^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) #include <dirent.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #include <errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) #include <inttypes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <regex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include "callchain.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include "debug.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include "dso.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include "env.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "event.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include "evsel.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "hist.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "machine.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "map.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "map_symbol.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include "branch.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "mem-events.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "srcline.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "symbol.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include "sort.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include "strlist.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "target.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include "thread.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "util.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include "vdso.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <stdbool.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <sys/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <sys/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include "unwind.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include "linux/hash.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include "asm/bug.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include "bpf-event.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <internal/lib.h> // page_size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include "cgroup.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <linux/ctype.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <symbol/kallsyms.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include <linux/mman.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include <linux/zalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static struct dso *machine__kernel_dso(struct machine *machine)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return machine->vmlinux_map->dso;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static void dsos__init(struct dsos *dsos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) INIT_LIST_HEAD(&dsos->head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) dsos->root = RB_ROOT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) init_rwsem(&dsos->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) static void machine__threads_init(struct machine *machine)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) for (i = 0; i < THREADS__TABLE_SIZE; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct threads *threads = &machine->threads[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) threads->entries = RB_ROOT_CACHED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) init_rwsem(&threads->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) threads->nr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) INIT_LIST_HEAD(&threads->dead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) threads->last_match = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static int machine__set_mmap_name(struct machine *machine)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (machine__is_host(machine))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) machine->mmap_name = strdup("[kernel.kallsyms]");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) else if (machine__is_default_guest(machine))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) machine->mmap_name = strdup("[guest.kernel.kallsyms]");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) else if (asprintf(&machine->mmap_name, "[guest.kernel.kallsyms.%d]",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) machine->pid) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) machine->mmap_name = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return machine->mmap_name ? 0 : -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) int machine__init(struct machine *machine, const char *root_dir, pid_t pid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) int err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) memset(machine, 0, sizeof(*machine));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) maps__init(&machine->kmaps, machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) RB_CLEAR_NODE(&machine->rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) dsos__init(&machine->dsos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) machine__threads_init(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) machine->vdso_info = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) machine->env = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) machine->pid = pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) machine->id_hdr_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) machine->kptr_restrict_warned = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) machine->comm_exec = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) machine->kernel_start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) machine->vmlinux_map = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) machine->root_dir = strdup(root_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (machine->root_dir == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (machine__set_mmap_name(machine))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (pid != HOST_KERNEL_ID) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) struct thread *thread = machine__findnew_thread(machine, -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) char comm[64];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) if (thread == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) snprintf(comm, sizeof(comm), "[guest/%d]", pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) thread__set_comm(thread, comm, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) thread__put(thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) machine->current_tid = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) zfree(&machine->root_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) zfree(&machine->mmap_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) struct machine *machine__new_host(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) struct machine *machine = malloc(sizeof(*machine));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (machine != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) machine__init(machine, "", HOST_KERNEL_ID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (machine__create_kernel_maps(machine) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) goto out_delete;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return machine;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) out_delete:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) free(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) struct machine *machine__new_kallsyms(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) struct machine *machine = machine__new_host();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * FIXME:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) * 1) We should switch to machine__load_kallsyms(), i.e. not explicitly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * ask for not using the kcore parsing code, once this one is fixed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) * to create a map per module.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) if (machine && machine__load_kallsyms(machine, "/proc/kallsyms") <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) machine__delete(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) machine = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) return machine;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) static void dsos__purge(struct dsos *dsos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) struct dso *pos, *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) down_write(&dsos->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) list_for_each_entry_safe(pos, n, &dsos->head, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) RB_CLEAR_NODE(&pos->rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) pos->root = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) list_del_init(&pos->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) dso__put(pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) up_write(&dsos->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) static void dsos__exit(struct dsos *dsos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) dsos__purge(dsos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) exit_rwsem(&dsos->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) void machine__delete_threads(struct machine *machine)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) struct rb_node *nd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) for (i = 0; i < THREADS__TABLE_SIZE; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) struct threads *threads = &machine->threads[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) down_write(&threads->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) nd = rb_first_cached(&threads->entries);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) while (nd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) struct thread *t = rb_entry(nd, struct thread, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) nd = rb_next(nd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) __machine__remove_thread(machine, t, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) up_write(&threads->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) void machine__exit(struct machine *machine)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) if (machine == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) machine__destroy_kernel_maps(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) maps__exit(&machine->kmaps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) dsos__exit(&machine->dsos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) machine__exit_vdso(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) zfree(&machine->root_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) zfree(&machine->mmap_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) zfree(&machine->current_tid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) for (i = 0; i < THREADS__TABLE_SIZE; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) struct threads *threads = &machine->threads[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) struct thread *thread, *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) * Forget about the dead, at this point whatever threads were
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * left in the dead lists better have a reference count taken
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) * by who is using them, and then, when they drop those references
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) * and it finally hits zero, thread__put() will check and see that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) * its not in the dead threads list and will not try to remove it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) * from there, just calling thread__delete() straight away.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) list_for_each_entry_safe(thread, n, &threads->dead, node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) list_del_init(&thread->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) exit_rwsem(&threads->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) void machine__delete(struct machine *machine)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) if (machine) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) machine__exit(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) free(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) void machines__init(struct machines *machines)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) machine__init(&machines->host, "", HOST_KERNEL_ID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) machines->guests = RB_ROOT_CACHED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) void machines__exit(struct machines *machines)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) machine__exit(&machines->host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) /* XXX exit guest */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) struct machine *machines__add(struct machines *machines, pid_t pid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) const char *root_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) struct rb_node **p = &machines->guests.rb_root.rb_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) struct rb_node *parent = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) struct machine *pos, *machine = malloc(sizeof(*machine));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) bool leftmost = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) if (machine == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (machine__init(machine, root_dir, pid) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) free(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) while (*p != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) parent = *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) pos = rb_entry(parent, struct machine, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) if (pid < pos->pid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) p = &(*p)->rb_left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) p = &(*p)->rb_right;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) leftmost = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) rb_link_node(&machine->rb_node, parent, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) rb_insert_color_cached(&machine->rb_node, &machines->guests, leftmost);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) return machine;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) void machines__set_comm_exec(struct machines *machines, bool comm_exec)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) struct rb_node *nd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) machines->host.comm_exec = comm_exec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) struct machine *machine = rb_entry(nd, struct machine, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) machine->comm_exec = comm_exec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) struct machine *machines__find(struct machines *machines, pid_t pid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) struct rb_node **p = &machines->guests.rb_root.rb_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) struct rb_node *parent = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) struct machine *machine;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) struct machine *default_machine = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) if (pid == HOST_KERNEL_ID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) return &machines->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) while (*p != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) parent = *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) machine = rb_entry(parent, struct machine, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if (pid < machine->pid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) p = &(*p)->rb_left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) else if (pid > machine->pid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) p = &(*p)->rb_right;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) return machine;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) if (!machine->pid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) default_machine = machine;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) return default_machine;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) struct machine *machines__findnew(struct machines *machines, pid_t pid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) char path[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) const char *root_dir = "";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) struct machine *machine = machines__find(machines, pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) if (machine && (machine->pid == pid))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) if ((pid != HOST_KERNEL_ID) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) (pid != DEFAULT_GUEST_KERNEL_ID) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) (symbol_conf.guestmount)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) sprintf(path, "%s/%d", symbol_conf.guestmount, pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if (access(path, R_OK)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) static struct strlist *seen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) if (!seen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) seen = strlist__new(NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) if (!strlist__has_entry(seen, path)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) pr_err("Can't access file %s\n", path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) strlist__add(seen, path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) machine = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) root_dir = path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) machine = machines__add(machines, pid, root_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) return machine;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) void machines__process_guests(struct machines *machines,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) machine__process_t process, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) struct rb_node *nd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) struct machine *pos = rb_entry(nd, struct machine, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) process(pos, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) struct rb_node *node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) struct machine *machine;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) machines->host.id_hdr_size = id_hdr_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) for (node = rb_first_cached(&machines->guests); node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) node = rb_next(node)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) machine = rb_entry(node, struct machine, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) machine->id_hdr_size = id_hdr_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) static void machine__update_thread_pid(struct machine *machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) struct thread *th, pid_t pid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) struct thread *leader;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) if (pid == th->pid_ || pid == -1 || th->pid_ != -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) th->pid_ = pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) if (th->pid_ == th->tid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) leader = __machine__findnew_thread(machine, th->pid_, th->pid_);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) if (!leader)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) if (!leader->maps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) leader->maps = maps__new(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) if (!leader->maps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) if (th->maps == leader->maps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) if (th->maps) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) * Maps are created from MMAP events which provide the pid and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) * tid. Consequently there never should be any maps on a thread
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) * with an unknown pid. Just print an error if there are.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) if (!maps__empty(th->maps))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) pr_err("Discarding thread maps for %d:%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) th->pid_, th->tid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) maps__put(th->maps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) th->maps = maps__get(leader->maps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) out_put:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) thread__put(leader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) out_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) goto out_put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) * Front-end cache - TID lookups come in blocks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) * so most of the time we dont have to look up
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) * the full rbtree:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) static struct thread*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) __threads__get_last_match(struct threads *threads, struct machine *machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) int pid, int tid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) struct thread *th;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) th = threads->last_match;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) if (th != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) if (th->tid == tid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) machine__update_thread_pid(machine, th, pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) return thread__get(th);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) threads->last_match = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) static struct thread*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) threads__get_last_match(struct threads *threads, struct machine *machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) int pid, int tid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) struct thread *th = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) if (perf_singlethreaded)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) th = __threads__get_last_match(threads, machine, pid, tid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) return th;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) __threads__set_last_match(struct threads *threads, struct thread *th)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) threads->last_match = th;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) threads__set_last_match(struct threads *threads, struct thread *th)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) if (perf_singlethreaded)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) __threads__set_last_match(threads, th);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) * Caller must eventually drop thread->refcnt returned with a successful
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) * lookup/new thread inserted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) static struct thread *____machine__findnew_thread(struct machine *machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) struct threads *threads,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) pid_t pid, pid_t tid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) bool create)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) struct rb_node **p = &threads->entries.rb_root.rb_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) struct rb_node *parent = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) struct thread *th;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) bool leftmost = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) th = threads__get_last_match(threads, machine, pid, tid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) if (th)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) return th;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) while (*p != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) parent = *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) th = rb_entry(parent, struct thread, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) if (th->tid == tid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) threads__set_last_match(threads, th);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) machine__update_thread_pid(machine, th, pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) return thread__get(th);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) if (tid < th->tid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) p = &(*p)->rb_left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) p = &(*p)->rb_right;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) leftmost = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) if (!create)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) th = thread__new(pid, tid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) if (th != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) rb_link_node(&th->rb_node, parent, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) rb_insert_color_cached(&th->rb_node, &threads->entries, leftmost);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) * We have to initialize maps separately after rb tree is updated.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) * The reason is that we call machine__findnew_thread
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) * within thread__init_maps to find the thread
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) * leader and that would screwed the rb tree.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) if (thread__init_maps(th, machine)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) rb_erase_cached(&th->rb_node, &threads->entries);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) RB_CLEAR_NODE(&th->rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) thread__put(th);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) * It is now in the rbtree, get a ref
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) thread__get(th);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) threads__set_last_match(threads, th);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) ++threads->nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) return th;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) return ____machine__findnew_thread(machine, machine__threads(machine, tid), pid, tid, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) struct thread *machine__findnew_thread(struct machine *machine, pid_t pid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) pid_t tid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) struct threads *threads = machine__threads(machine, tid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) struct thread *th;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) down_write(&threads->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) th = __machine__findnew_thread(machine, pid, tid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) up_write(&threads->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) return th;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) struct thread *machine__find_thread(struct machine *machine, pid_t pid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) pid_t tid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) struct threads *threads = machine__threads(machine, tid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) struct thread *th;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) down_read(&threads->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) th = ____machine__findnew_thread(machine, threads, pid, tid, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) up_read(&threads->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) return th;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) struct comm *machine__thread_exec_comm(struct machine *machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) struct thread *thread)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) if (machine->comm_exec)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) return thread__exec_comm(thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) return thread__comm(thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) int machine__process_comm_event(struct machine *machine, union perf_event *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) struct perf_sample *sample)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) struct thread *thread = machine__findnew_thread(machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) event->comm.pid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) event->comm.tid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) if (exec)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) machine->comm_exec = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) if (dump_trace)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) perf_event__fprintf_comm(event, stdout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) if (thread == NULL ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) __thread__set_comm(thread, event->comm.comm, sample->time, exec)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) err = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) thread__put(thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) int machine__process_namespaces_event(struct machine *machine __maybe_unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) union perf_event *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) struct perf_sample *sample __maybe_unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) struct thread *thread = machine__findnew_thread(machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) event->namespaces.pid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) event->namespaces.tid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) WARN_ONCE(event->namespaces.nr_namespaces > NR_NAMESPACES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) "\nWARNING: kernel seems to support more namespaces than perf"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) " tool.\nTry updating the perf tool..\n\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) WARN_ONCE(event->namespaces.nr_namespaces < NR_NAMESPACES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) "\nWARNING: perf tool seems to support more namespaces than"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) " the kernel.\nTry updating the kernel..\n\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) if (dump_trace)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) perf_event__fprintf_namespaces(event, stdout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) if (thread == NULL ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) thread__set_namespaces(thread, sample->time, &event->namespaces)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) dump_printf("problem processing PERF_RECORD_NAMESPACES, skipping event.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) err = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) thread__put(thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) int machine__process_cgroup_event(struct machine *machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) union perf_event *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) struct perf_sample *sample __maybe_unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) struct cgroup *cgrp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) if (dump_trace)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) perf_event__fprintf_cgroup(event, stdout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) cgrp = cgroup__findnew(machine->env, event->cgroup.id, event->cgroup.path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) if (cgrp == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) int machine__process_lost_event(struct machine *machine __maybe_unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) union perf_event *event, struct perf_sample *sample __maybe_unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) dump_printf(": id:%" PRI_lu64 ": lost:%" PRI_lu64 "\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) event->lost.id, event->lost.lost);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) int machine__process_lost_samples_event(struct machine *machine __maybe_unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) union perf_event *event, struct perf_sample *sample)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) dump_printf(": id:%" PRIu64 ": lost samples :%" PRI_lu64 "\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) sample->id, event->lost_samples.lost);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) static struct dso *machine__findnew_module_dso(struct machine *machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) struct kmod_path *m,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) const char *filename)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) struct dso *dso;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) down_write(&machine->dsos.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) dso = __dsos__find(&machine->dsos, m->name, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) if (!dso) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) dso = __dsos__addnew(&machine->dsos, m->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) if (dso == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) dso__set_module_info(dso, m, machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) dso__set_long_name(dso, strdup(filename), true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) dso->kernel = DSO_SPACE__KERNEL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) dso__get(dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) up_write(&machine->dsos.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) return dso;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) int machine__process_aux_event(struct machine *machine __maybe_unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) union perf_event *event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) if (dump_trace)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) perf_event__fprintf_aux(event, stdout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) int machine__process_itrace_start_event(struct machine *machine __maybe_unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) union perf_event *event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) if (dump_trace)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) perf_event__fprintf_itrace_start(event, stdout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) int machine__process_switch_event(struct machine *machine __maybe_unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) union perf_event *event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) if (dump_trace)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) perf_event__fprintf_switch(event, stdout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) static int machine__process_ksymbol_register(struct machine *machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) union perf_event *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) struct perf_sample *sample __maybe_unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) struct symbol *sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) struct map *map = maps__find(&machine->kmaps, event->ksymbol.addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) if (!map) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) struct dso *dso = dso__new(event->ksymbol.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) if (dso) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) dso->kernel = DSO_SPACE__KERNEL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) map = map__new2(0, dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) if (!dso || !map) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) dso__put(dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) if (event->ksymbol.ksym_type == PERF_RECORD_KSYMBOL_TYPE_OOL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) map->dso->binary_type = DSO_BINARY_TYPE__OOL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) map->dso->data.file_size = event->ksymbol.len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) dso__set_loaded(map->dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) map->start = event->ksymbol.addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) map->end = map->start + event->ksymbol.len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) maps__insert(&machine->kmaps, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) dso__set_loaded(dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) if (is_bpf_image(event->ksymbol.name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) dso->binary_type = DSO_BINARY_TYPE__BPF_IMAGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) dso__set_long_name(dso, "", false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) sym = symbol__new(map->map_ip(map, map->start),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) event->ksymbol.len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) 0, 0, event->ksymbol.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) if (!sym)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) dso__insert_symbol(map->dso, sym);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) static int machine__process_ksymbol_unregister(struct machine *machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) union perf_event *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) struct perf_sample *sample __maybe_unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) struct symbol *sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) struct map *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) map = maps__find(&machine->kmaps, event->ksymbol.addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) if (!map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) if (map != machine->vmlinux_map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) maps__remove(&machine->kmaps, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) sym = dso__find_symbol(map->dso, map->map_ip(map, map->start));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) if (sym)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) dso__delete_symbol(map->dso, sym);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) int machine__process_ksymbol(struct machine *machine __maybe_unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) union perf_event *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) struct perf_sample *sample)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) if (dump_trace)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) perf_event__fprintf_ksymbol(event, stdout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) if (event->ksymbol.flags & PERF_RECORD_KSYMBOL_FLAGS_UNREGISTER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) return machine__process_ksymbol_unregister(machine, event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) sample);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) return machine__process_ksymbol_register(machine, event, sample);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) int machine__process_text_poke(struct machine *machine, union perf_event *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) struct perf_sample *sample __maybe_unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) struct map *map = maps__find(&machine->kmaps, event->text_poke.addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) if (dump_trace)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) perf_event__fprintf_text_poke(event, machine, stdout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) if (!event->text_poke.new_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) if (cpumode != PERF_RECORD_MISC_KERNEL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) pr_debug("%s: unsupported cpumode - ignoring\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) if (map && map->dso) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) u8 *new_bytes = event->text_poke.bytes + event->text_poke.old_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) * Kernel maps might be changed when loading symbols so loading
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) * must be done prior to using kernel maps.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) map__load(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) ret = dso__data_write_cache_addr(map->dso, map, machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) event->text_poke.addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) new_bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) event->text_poke.new_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) if (ret != event->text_poke.new_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) pr_debug("Failed to write kernel text poke at %#" PRI_lx64 "\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) event->text_poke.addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) pr_debug("Failed to find kernel text poke address map for %#" PRI_lx64 "\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) event->text_poke.addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) static struct map *machine__addnew_module_map(struct machine *machine, u64 start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) const char *filename)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) struct map *map = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) struct kmod_path m;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) struct dso *dso;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) if (kmod_path__parse_name(&m, filename))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) dso = machine__findnew_module_dso(machine, &m, filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) if (dso == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) map = map__new2(start, dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) if (map == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) maps__insert(&machine->kmaps, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) /* Put the map here because maps__insert alread got it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) map__put(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) /* put the dso here, corresponding to machine__findnew_module_dso */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) dso__put(dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) zfree(&m.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) return map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) size_t machines__fprintf_dsos(struct machines *machines, FILE *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) struct rb_node *nd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) size_t ret = __dsos__fprintf(&machines->host.dsos.head, fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) struct machine *pos = rb_entry(nd, struct machine, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) ret += __dsos__fprintf(&pos->dsos.head, fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) bool (skip)(struct dso *dso, int parm), int parm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) return __dsos__fprintf_buildid(&m->dsos.head, fp, skip, parm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) bool (skip)(struct dso *dso, int parm), int parm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) struct rb_node *nd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) struct machine *pos = rb_entry(nd, struct machine, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) size_t printed = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) struct dso *kdso = machine__kernel_dso(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) if (kdso->has_build_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) char filename[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) if (dso__build_id_filename(kdso, filename, sizeof(filename),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) false))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) printed += fprintf(fp, "[0] %s\n", filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) for (i = 0; i < vmlinux_path__nr_entries; ++i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) printed += fprintf(fp, "[%d] %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) i + kdso->has_build_id, vmlinux_path[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) return printed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) size_t machine__fprintf(struct machine *machine, FILE *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) struct rb_node *nd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) size_t ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) for (i = 0; i < THREADS__TABLE_SIZE; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) struct threads *threads = &machine->threads[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) down_read(&threads->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) ret = fprintf(fp, "Threads: %u\n", threads->nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) for (nd = rb_first_cached(&threads->entries); nd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) nd = rb_next(nd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) struct thread *pos = rb_entry(nd, struct thread, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) ret += thread__fprintf(pos, fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) up_read(&threads->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) static struct dso *machine__get_kernel(struct machine *machine)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) const char *vmlinux_name = machine->mmap_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) struct dso *kernel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) if (machine__is_host(machine)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) if (symbol_conf.vmlinux_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) vmlinux_name = symbol_conf.vmlinux_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) kernel = machine__findnew_kernel(machine, vmlinux_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) "[kernel]", DSO_SPACE__KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) if (symbol_conf.default_guest_vmlinux_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) vmlinux_name = symbol_conf.default_guest_vmlinux_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) kernel = machine__findnew_kernel(machine, vmlinux_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) "[guest.kernel]",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) DSO_SPACE__KERNEL_GUEST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) if (kernel != NULL && (!kernel->has_build_id))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) dso__read_running_kernel_build_id(kernel, machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) return kernel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) struct process_args {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) u64 start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) void machine__get_kallsyms_filename(struct machine *machine, char *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) size_t bufsz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) if (machine__is_default_guest(machine))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) /* Figure out the start address of kernel map from /proc/kallsyms.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) * Returns the name of the start symbol in *symbol_name. Pass in NULL as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) * symbol_name if it's not that important.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) static int machine__get_running_kernel_start(struct machine *machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) const char **symbol_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) u64 *start, u64 *end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) char filename[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) int i, err = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) u64 addr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) machine__get_kallsyms_filename(machine, filename, PATH_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) if (symbol__restricted_filename(filename, "/proc/kallsyms"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) err = kallsyms__get_function_start(filename, name, &addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) if (symbol_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) *symbol_name = name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) *start = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) err = kallsyms__get_function_start(filename, "_etext", &addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) *end = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) int machine__create_extra_kernel_map(struct machine *machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) struct dso *kernel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) struct extra_kernel_map *xm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) struct kmap *kmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) struct map *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) map = map__new2(xm->start, kernel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) if (!map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) map->end = xm->end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) map->pgoff = xm->pgoff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) kmap = map__kmap(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) strlcpy(kmap->name, xm->name, KMAP_NAME_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) maps__insert(&machine->kmaps, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) pr_debug2("Added extra kernel map %s %" PRIx64 "-%" PRIx64 "\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) kmap->name, map->start, map->end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) map__put(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) static u64 find_entry_trampoline(struct dso *dso)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) /* Duplicates are removed so lookup all aliases */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) const char *syms[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) "_entry_trampoline",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) "__entry_trampoline_start",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) "entry_SYSCALL_64_trampoline",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) struct symbol *sym = dso__first_symbol(dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) for (; sym; sym = dso__next_symbol(sym)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) if (sym->binding != STB_GLOBAL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) for (i = 0; i < ARRAY_SIZE(syms); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) if (!strcmp(sym->name, syms[i]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) return sym->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) * These values can be used for kernels that do not have symbols for the entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) * trampolines in kallsyms.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) #define X86_64_CPU_ENTRY_AREA_PER_CPU 0xfffffe0000000000ULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) #define X86_64_CPU_ENTRY_AREA_SIZE 0x2c000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) #define X86_64_ENTRY_TRAMPOLINE 0x6000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) /* Map x86_64 PTI entry trampolines */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) int machine__map_x86_64_entry_trampolines(struct machine *machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) struct dso *kernel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) struct maps *kmaps = &machine->kmaps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) int nr_cpus_avail, cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) bool found = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) struct map *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) u64 pgoff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) * In the vmlinux case, pgoff is a virtual address which must now be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) * mapped to a vmlinux offset.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) maps__for_each_entry(kmaps, map) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) struct kmap *kmap = __map__kmap(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) struct map *dest_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) if (!kmap || !is_entry_trampoline(kmap->name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) dest_map = maps__find(kmaps, map->pgoff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) if (dest_map != map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) map->pgoff = dest_map->map_ip(dest_map, map->pgoff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) found = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) if (found || machine->trampolines_mapped)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) pgoff = find_entry_trampoline(kernel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) if (!pgoff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) nr_cpus_avail = machine__nr_cpus_avail(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) /* Add a 1 page map for each CPU's entry trampoline */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) for (cpu = 0; cpu < nr_cpus_avail; cpu++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) u64 va = X86_64_CPU_ENTRY_AREA_PER_CPU +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) cpu * X86_64_CPU_ENTRY_AREA_SIZE +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) X86_64_ENTRY_TRAMPOLINE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) struct extra_kernel_map xm = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) .start = va,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) .end = va + page_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) .pgoff = pgoff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) strlcpy(xm.name, ENTRY_TRAMPOLINE_NAME, KMAP_NAME_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) if (machine__create_extra_kernel_map(machine, kernel, &xm) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) machine->trampolines_mapped = nr_cpus_avail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) int __weak machine__create_extra_kernel_maps(struct machine *machine __maybe_unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) struct dso *kernel __maybe_unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) __machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) /* In case of renewal the kernel map, destroy previous one */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) machine__destroy_kernel_maps(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) machine->vmlinux_map = map__new2(0, kernel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) if (machine->vmlinux_map == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) machine->vmlinux_map->map_ip = machine->vmlinux_map->unmap_ip = identity__map_ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) maps__insert(&machine->kmaps, machine->vmlinux_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) void machine__destroy_kernel_maps(struct machine *machine)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) struct kmap *kmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) struct map *map = machine__kernel_map(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) if (map == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) kmap = map__kmap(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) maps__remove(&machine->kmaps, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) if (kmap && kmap->ref_reloc_sym) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) zfree((char **)&kmap->ref_reloc_sym->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) zfree(&kmap->ref_reloc_sym);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) map__zput(machine->vmlinux_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) int machines__create_guest_kernel_maps(struct machines *machines)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) struct dirent **namelist = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) int i, items = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) char path[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) pid_t pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) char *endp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) if (symbol_conf.default_guest_vmlinux_name ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) symbol_conf.default_guest_modules ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) symbol_conf.default_guest_kallsyms) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) if (symbol_conf.guestmount) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) if (items <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) for (i = 0; i < items; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) if (!isdigit(namelist[i]->d_name[0])) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) /* Filter out . and .. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) if ((*endp != '\0') ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) (endp == namelist[i]->d_name) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) (errno == ERANGE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) pr_debug("invalid directory (%s). Skipping.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) namelist[i]->d_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) sprintf(path, "%s/%s/proc/kallsyms",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) symbol_conf.guestmount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) namelist[i]->d_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) ret = access(path, R_OK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) pr_debug("Can't access file %s\n", path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) goto failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) machines__create_kernel_maps(machines, pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) free(namelist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) void machines__destroy_kernel_maps(struct machines *machines)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) struct rb_node *next = rb_first_cached(&machines->guests);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) machine__destroy_kernel_maps(&machines->host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) while (next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) struct machine *pos = rb_entry(next, struct machine, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) next = rb_next(&pos->rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) rb_erase_cached(&pos->rb_node, &machines->guests);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) machine__delete(pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) int machines__create_kernel_maps(struct machines *machines, pid_t pid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) struct machine *machine = machines__findnew(machines, pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) if (machine == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) return machine__create_kernel_maps(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) int machine__load_kallsyms(struct machine *machine, const char *filename)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) struct map *map = machine__kernel_map(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) int ret = __dso__load_kallsyms(map->dso, filename, map, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) if (ret > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) dso__set_loaded(map->dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) * Since /proc/kallsyms will have multiple sessions for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) * kernel, with modules between them, fixup the end of all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) * sections.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) maps__fixup_end(&machine->kmaps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) int machine__load_vmlinux_path(struct machine *machine)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) struct map *map = machine__kernel_map(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) int ret = dso__load_vmlinux_path(map->dso, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) if (ret > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) dso__set_loaded(map->dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) static char *get_kernel_version(const char *root_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) char version[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) FILE *file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) char *name, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) const char *prefix = "Linux version ";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) sprintf(version, "%s/proc/version", root_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) file = fopen(version, "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) if (!file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) tmp = fgets(version, sizeof(version), file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) fclose(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) if (!tmp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) name = strstr(version, prefix);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) if (!name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) name += strlen(prefix);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) tmp = strchr(name, ' ');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) if (tmp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) *tmp = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330) return strdup(name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) static bool is_kmod_dso(struct dso *dso)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) static int maps__set_module_path(struct maps *maps, const char *path, struct kmod_path *m)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) char *long_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) struct map *map = maps__find_by_name(maps, m->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) if (map == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) long_name = strdup(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) if (long_name == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) dso__set_long_name(map->dso, long_name, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) dso__kernel_module_get_build_id(map->dso, "");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) * Full name could reveal us kmod compression, so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) * we need to update the symtab_type if needed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) if (m->comp && is_kmod_dso(map->dso)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) map->dso->symtab_type++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) map->dso->comp = m->comp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) static int maps__set_modules_path_dir(struct maps *maps, const char *dir_name, int depth)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) struct dirent *dent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) DIR *dir = opendir(dir_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) if (!dir) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) while ((dent = readdir(dir)) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) char path[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) struct stat st;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) /*sshfs might return bad dent->d_type, so we have to stat*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) if (stat(path, &st))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) if (S_ISDIR(st.st_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) if (!strcmp(dent->d_name, ".") ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) !strcmp(dent->d_name, ".."))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) /* Do not follow top-level source and build symlinks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) if (depth == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) if (!strcmp(dent->d_name, "source") ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) !strcmp(dent->d_name, "build"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) ret = maps__set_modules_path_dir(maps, path, depth + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) struct kmod_path m;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) ret = kmod_path__parse_name(&m, dent->d_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) if (m.kmod)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) ret = maps__set_module_path(maps, path, &m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) zfree(&m.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) closedir(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) static int machine__set_modules_path(struct machine *machine)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) char *version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) char modules_path[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) version = get_kernel_version(machine->root_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) if (!version)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) machine->root_dir, version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) free(version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) return maps__set_modules_path_dir(&machine->kmaps, modules_path, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) int __weak arch__fix_module_text_start(u64 *start __maybe_unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) u64 *size __maybe_unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) const char *name __maybe_unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) static int machine__create_module(void *arg, const char *name, u64 start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446) u64 size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) struct machine *machine = arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) struct map *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) if (arch__fix_module_text_start(&start, &size, name) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454) map = machine__addnew_module_map(machine, start, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) if (map == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457) map->end = start + size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) dso__kernel_module_get_build_id(map->dso, machine->root_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) static int machine__create_modules(struct machine *machine)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) const char *modules;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) char path[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) if (machine__is_default_guest(machine)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) modules = symbol_conf.default_guest_modules;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472) snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) modules = path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) if (symbol__restricted_filename(modules, "/proc/modules"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) if (modules__parse(modules, machine, machine__create_module))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) if (!machine__set_modules_path(machine))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485) pr_debug("Problems setting modules path maps, continuing anyway...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) static void machine__set_kernel_mmap(struct machine *machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) u64 start, u64 end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) machine->vmlinux_map->start = start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) machine->vmlinux_map->end = end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) * Be a bit paranoid here, some perf.data file came with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) * a zero sized synthesized MMAP event for the kernel.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) if (start == 0 && end == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) machine->vmlinux_map->end = ~0ULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503) static void machine__update_kernel_mmap(struct machine *machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504) u64 start, u64 end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) struct map *map = machine__kernel_map(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) map__get(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509) maps__remove(&machine->kmaps, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) machine__set_kernel_mmap(machine, start, end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) maps__insert(&machine->kmaps, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) map__put(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517) int machine__create_kernel_maps(struct machine *machine)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519) struct dso *kernel = machine__get_kernel(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520) const char *name = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) struct map *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522) u64 start = 0, end = ~0ULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) if (kernel == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) ret = __machine__create_kernel_maps(machine, kernel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) goto out_put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) if (symbol_conf.use_modules && machine__create_modules(machine) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) if (machine__is_host(machine))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) pr_debug("Problems creating module maps, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535) "continuing anyway...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537) pr_debug("Problems creating module maps for guest %d, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538) "continuing anyway...\n", machine->pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) if (!machine__get_running_kernel_start(machine, &name, &start, &end)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542) if (name &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543) map__set_kallsyms_ref_reloc_sym(machine->vmlinux_map, name, start)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) machine__destroy_kernel_maps(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) ret = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) goto out_put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550) * we have a real start address now, so re-order the kmaps
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) * assume it's the last in the kmaps
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) machine__update_kernel_mmap(machine, start, end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556) if (machine__create_extra_kernel_maps(machine, kernel))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) pr_debug("Problems creating extra kernel maps, continuing anyway...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) if (end == ~0ULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) /* update end address of the kernel map using adjacent module address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) map = map__next(machine__kernel_map(machine));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) if (map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) machine__set_kernel_mmap(machine, start, map->start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) out_put:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) dso__put(kernel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) static bool machine__uses_kcore(struct machine *machine)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573) struct dso *dso;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) list_for_each_entry(dso, &machine->dsos.head, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) if (dso__is_kcore(dso))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) static bool perf_event__is_extra_kernel_mmap(struct machine *machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) union perf_event *event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) return machine__is(machine, "x86_64") &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) is_entry_trampoline(event->mmap.filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) static int machine__process_extra_kernel_map(struct machine *machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) union perf_event *event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) struct dso *kernel = machine__kernel_dso(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) struct extra_kernel_map xm = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) .start = event->mmap.start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) .end = event->mmap.start + event->mmap.len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597) .pgoff = event->mmap.pgoff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) if (kernel == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) strlcpy(xm.name, event->mmap.filename, KMAP_NAME_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) return machine__create_extra_kernel_map(machine, kernel, &xm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) static int machine__process_kernel_mmap_event(struct machine *machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) union perf_event *event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) struct map *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) enum dso_space_type dso_space;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) bool is_kernel_mmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) /* If we have maps from kcore then we do not need or want any others */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616) if (machine__uses_kcore(machine))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) if (machine__is_host(machine))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) dso_space = DSO_SPACE__KERNEL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) dso_space = DSO_SPACE__KERNEL_GUEST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) is_kernel_mmap = memcmp(event->mmap.filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) machine->mmap_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) strlen(machine->mmap_name) - 1) == 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) if (event->mmap.filename[0] == '/' ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629) map = machine__addnew_module_map(machine, event->mmap.start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) event->mmap.filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631) if (map == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) goto out_problem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) map->end = map->start + event->mmap.len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635) } else if (is_kernel_mmap) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) const char *symbol_name = (event->mmap.filename +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) strlen(machine->mmap_name));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) * Should be there already, from the build-id table in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) * the header.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) struct dso *kernel = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) struct dso *dso;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) down_read(&machine->dsos.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) list_for_each_entry(dso, &machine->dsos.head, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) * The cpumode passed to is_kernel_module is not the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651) * cpumode of *this* event. If we insist on passing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) * correct cpumode to is_kernel_module, we should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653) * record the cpumode when we adding this dso to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) * linked list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) * However we don't really need passing correct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657) * cpumode. We know the correct cpumode must be kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) * mode (if not, we should not link it onto kernel_dsos
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659) * list).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661) * Therefore, we pass PERF_RECORD_MISC_CPUMODE_UNKNOWN.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) * is_kernel_module() treats it as a kernel cpumode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665) if (!dso->kernel ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666) is_kernel_module(dso->long_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667) PERF_RECORD_MISC_CPUMODE_UNKNOWN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671) kernel = dso;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675) up_read(&machine->dsos.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677) if (kernel == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678) kernel = machine__findnew_dso(machine, machine->mmap_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679) if (kernel == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680) goto out_problem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682) kernel->kernel = dso_space;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683) if (__machine__create_kernel_maps(machine, kernel) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684) dso__put(kernel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685) goto out_problem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688) if (strstr(kernel->long_name, "vmlinux"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689) dso__set_short_name(kernel, "[kernel.vmlinux]", false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691) machine__update_kernel_mmap(machine, event->mmap.start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692) event->mmap.start + event->mmap.len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695) * Avoid using a zero address (kptr_restrict) for the ref reloc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696) * symbol. Effectively having zero here means that at record
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697) * time /proc/sys/kernel/kptr_restrict was non zero.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699) if (event->mmap.pgoff != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700) map__set_kallsyms_ref_reloc_sym(machine->vmlinux_map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701) symbol_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702) event->mmap.pgoff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705) if (machine__is_default_guest(machine)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707) * preload dso of guest kernel and modules
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) dso__load(kernel, machine__kernel_map(machine));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711) } else if (perf_event__is_extra_kernel_mmap(machine, event)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712) return machine__process_extra_kernel_map(machine, event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715) out_problem:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1717) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1719) int machine__process_mmap2_event(struct machine *machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1720) union perf_event *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1721) struct perf_sample *sample)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1722) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1723) struct thread *thread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1724) struct map *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1725) struct dso_id dso_id = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1726) .maj = event->mmap2.maj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1727) .min = event->mmap2.min,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1728) .ino = event->mmap2.ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1729) .ino_generation = event->mmap2.ino_generation,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1730) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1731) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1732)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1733) if (dump_trace)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1734) perf_event__fprintf_mmap2(event, stdout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1736) if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1737) sample->cpumode == PERF_RECORD_MISC_KERNEL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1738) ret = machine__process_kernel_mmap_event(machine, event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1739) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1740) goto out_problem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1741) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1742) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1744) thread = machine__findnew_thread(machine, event->mmap2.pid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1745) event->mmap2.tid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1746) if (thread == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1747) goto out_problem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1748)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1749) map = map__new(machine, event->mmap2.start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1750) event->mmap2.len, event->mmap2.pgoff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1751) &dso_id, event->mmap2.prot,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1752) event->mmap2.flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1753) event->mmap2.filename, thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1755) if (map == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1756) goto out_problem_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1757)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1758) ret = thread__insert_map(thread, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1759) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1760) goto out_problem_insert;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1761)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1762) thread__put(thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1763) map__put(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1764) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1765)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1766) out_problem_insert:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1767) map__put(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1768) out_problem_map:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1769) thread__put(thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1770) out_problem:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1771) dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1772) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1773) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1774)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1775) int machine__process_mmap_event(struct machine *machine, union perf_event *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1776) struct perf_sample *sample)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1777) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1778) struct thread *thread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1779) struct map *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1780) u32 prot = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1781) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1782)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1783) if (dump_trace)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1784) perf_event__fprintf_mmap(event, stdout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1785)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1786) if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1787) sample->cpumode == PERF_RECORD_MISC_KERNEL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1788) ret = machine__process_kernel_mmap_event(machine, event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1789) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1790) goto out_problem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1791) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1792) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1793)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1794) thread = machine__findnew_thread(machine, event->mmap.pid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1795) event->mmap.tid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1796) if (thread == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1797) goto out_problem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1798)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1799) if (!(event->header.misc & PERF_RECORD_MISC_MMAP_DATA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1800) prot = PROT_EXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1802) map = map__new(machine, event->mmap.start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1803) event->mmap.len, event->mmap.pgoff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1804) NULL, prot, 0, event->mmap.filename, thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1805)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1806) if (map == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1807) goto out_problem_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1808)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1809) ret = thread__insert_map(thread, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1810) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1811) goto out_problem_insert;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1812)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1813) thread__put(thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1814) map__put(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1815) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1816)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1817) out_problem_insert:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1818) map__put(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1819) out_problem_map:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1820) thread__put(thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1821) out_problem:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1822) dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1823) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1824) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1825)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1826) static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1827) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1828) struct threads *threads = machine__threads(machine, th->tid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1829)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1830) if (threads->last_match == th)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1831) threads__set_last_match(threads, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1832)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1833) if (lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1834) down_write(&threads->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1835)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1836) BUG_ON(refcount_read(&th->refcnt) == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1837)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1838) rb_erase_cached(&th->rb_node, &threads->entries);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1839) RB_CLEAR_NODE(&th->rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1840) --threads->nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1841) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1842) * Move it first to the dead_threads list, then drop the reference,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1843) * if this is the last reference, then the thread__delete destructor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1844) * will be called and we will remove it from the dead_threads list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1845) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1846) list_add_tail(&th->node, &threads->dead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1847)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1848) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1849) * We need to do the put here because if this is the last refcount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1850) * then we will be touching the threads->dead head when removing the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1851) * thread.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1852) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1853) thread__put(th);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1854)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1855) if (lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1856) up_write(&threads->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1857) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1858)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1859) void machine__remove_thread(struct machine *machine, struct thread *th)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1860) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1861) return __machine__remove_thread(machine, th, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1862) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1863)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1864) int machine__process_fork_event(struct machine *machine, union perf_event *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1865) struct perf_sample *sample)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1866) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1867) struct thread *thread = machine__find_thread(machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1868) event->fork.pid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1869) event->fork.tid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1870) struct thread *parent = machine__findnew_thread(machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1871) event->fork.ppid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1872) event->fork.ptid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1873) bool do_maps_clone = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1874) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1875)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1876) if (dump_trace)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1877) perf_event__fprintf_task(event, stdout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1878)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1879) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1880) * There may be an existing thread that is not actually the parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1881) * either because we are processing events out of order, or because the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1882) * (fork) event that would have removed the thread was lost. Assume the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1883) * latter case and continue on as best we can.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1884) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1885) if (parent->pid_ != (pid_t)event->fork.ppid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1886) dump_printf("removing erroneous parent thread %d/%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1887) parent->pid_, parent->tid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1888) machine__remove_thread(machine, parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1889) thread__put(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1890) parent = machine__findnew_thread(machine, event->fork.ppid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1891) event->fork.ptid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1892) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1893)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1894) /* if a thread currently exists for the thread id remove it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1895) if (thread != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1896) machine__remove_thread(machine, thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1897) thread__put(thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1898) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1899)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1900) thread = machine__findnew_thread(machine, event->fork.pid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1901) event->fork.tid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1902) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1903) * When synthesizing FORK events, we are trying to create thread
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1904) * objects for the already running tasks on the machine.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1905) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1906) * Normally, for a kernel FORK event, we want to clone the parent's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1907) * maps because that is what the kernel just did.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1908) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1909) * But when synthesizing, this should not be done. If we do, we end up
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1910) * with overlapping maps as we process the sythesized MMAP2 events that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1911) * get delivered shortly thereafter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1912) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1913) * Use the FORK event misc flags in an internal way to signal this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1914) * situation, so we can elide the map clone when appropriate.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1915) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1916) if (event->fork.header.misc & PERF_RECORD_MISC_FORK_EXEC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1917) do_maps_clone = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1918)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1919) if (thread == NULL || parent == NULL ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1920) thread__fork(thread, parent, sample->time, do_maps_clone) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1921) dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1922) err = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1923) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1924) thread__put(thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1925) thread__put(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1926)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1927) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1928) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1929)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1930) int machine__process_exit_event(struct machine *machine, union perf_event *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1931) struct perf_sample *sample __maybe_unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1932) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1933) struct thread *thread = machine__find_thread(machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1934) event->fork.pid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1935) event->fork.tid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1936)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1937) if (dump_trace)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1938) perf_event__fprintf_task(event, stdout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1939)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1940) if (thread != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1941) thread__exited(thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1942) thread__put(thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1943) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1944)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1945) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1946) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1947)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1948) int machine__process_event(struct machine *machine, union perf_event *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1949) struct perf_sample *sample)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1950) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1951) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1952)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1953) switch (event->header.type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1954) case PERF_RECORD_COMM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1955) ret = machine__process_comm_event(machine, event, sample); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1956) case PERF_RECORD_MMAP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1957) ret = machine__process_mmap_event(machine, event, sample); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1958) case PERF_RECORD_NAMESPACES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1959) ret = machine__process_namespaces_event(machine, event, sample); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1960) case PERF_RECORD_CGROUP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1961) ret = machine__process_cgroup_event(machine, event, sample); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1962) case PERF_RECORD_MMAP2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1963) ret = machine__process_mmap2_event(machine, event, sample); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1964) case PERF_RECORD_FORK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1965) ret = machine__process_fork_event(machine, event, sample); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1966) case PERF_RECORD_EXIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1967) ret = machine__process_exit_event(machine, event, sample); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1968) case PERF_RECORD_LOST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1969) ret = machine__process_lost_event(machine, event, sample); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1970) case PERF_RECORD_AUX:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1971) ret = machine__process_aux_event(machine, event); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1972) case PERF_RECORD_ITRACE_START:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1973) ret = machine__process_itrace_start_event(machine, event); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1974) case PERF_RECORD_LOST_SAMPLES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1975) ret = machine__process_lost_samples_event(machine, event, sample); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1976) case PERF_RECORD_SWITCH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1977) case PERF_RECORD_SWITCH_CPU_WIDE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1978) ret = machine__process_switch_event(machine, event); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1979) case PERF_RECORD_KSYMBOL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1980) ret = machine__process_ksymbol(machine, event, sample); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1981) case PERF_RECORD_BPF_EVENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1982) ret = machine__process_bpf(machine, event, sample); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1983) case PERF_RECORD_TEXT_POKE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1984) ret = machine__process_text_poke(machine, event, sample); break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1985) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1986) ret = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1987) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1988) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1989)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1990) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1991) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1992)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1993) static bool symbol__match_regex(struct symbol *sym, regex_t *regex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1994) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1995) if (!regexec(regex, sym->name, 0, NULL, 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1996) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1997) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1998) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1999)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2000) static void ip__resolve_ams(struct thread *thread,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2001) struct addr_map_symbol *ams,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2002) u64 ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2003) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2004) struct addr_location al;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2005)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2006) memset(&al, 0, sizeof(al));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2007) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2008) * We cannot use the header.misc hint to determine whether a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2009) * branch stack address is user, kernel, guest, hypervisor.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2010) * Branches may straddle the kernel/user/hypervisor boundaries.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2011) * Thus, we have to try consecutively until we find a match
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2012) * or else, the symbol is unknown
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2013) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2014) thread__find_cpumode_addr_location(thread, ip, &al);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2015)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2016) ams->addr = ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2017) ams->al_addr = al.addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2018) ams->ms.maps = al.maps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2019) ams->ms.sym = al.sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2020) ams->ms.map = al.map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2021) ams->phys_addr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2022) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2023)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2024) static void ip__resolve_data(struct thread *thread,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2025) u8 m, struct addr_map_symbol *ams,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2026) u64 addr, u64 phys_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2027) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2028) struct addr_location al;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2029)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2030) memset(&al, 0, sizeof(al));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2031)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2032) thread__find_symbol(thread, m, addr, &al);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2033)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2034) ams->addr = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2035) ams->al_addr = al.addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2036) ams->ms.maps = al.maps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2037) ams->ms.sym = al.sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2038) ams->ms.map = al.map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2039) ams->phys_addr = phys_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2040) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2041)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2042) struct mem_info *sample__resolve_mem(struct perf_sample *sample,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2043) struct addr_location *al)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2044) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2045) struct mem_info *mi = mem_info__new();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2046)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2047) if (!mi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2048) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2049)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2050) ip__resolve_ams(al->thread, &mi->iaddr, sample->ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2051) ip__resolve_data(al->thread, al->cpumode, &mi->daddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2052) sample->addr, sample->phys_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2053) mi->data_src.val = sample->data_src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2054)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2055) return mi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2056) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2057)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2058) static char *callchain_srcline(struct map_symbol *ms, u64 ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2059) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2060) struct map *map = ms->map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2061) char *srcline = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2062)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2063) if (!map || callchain_param.key == CCKEY_FUNCTION)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2064) return srcline;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2065)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2066) srcline = srcline__tree_find(&map->dso->srclines, ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2067) if (!srcline) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2068) bool show_sym = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2069) bool show_addr = callchain_param.key == CCKEY_ADDRESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2070)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2071) srcline = get_srcline(map->dso, map__rip_2objdump(map, ip),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2072) ms->sym, show_sym, show_addr, ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2073) srcline__tree_insert(&map->dso->srclines, ip, srcline);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2074) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2075)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2076) return srcline;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2077) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2078)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2079) struct iterations {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2080) int nr_loop_iter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2081) u64 cycles;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2082) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2083)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2084) static int add_callchain_ip(struct thread *thread,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2085) struct callchain_cursor *cursor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2086) struct symbol **parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2087) struct addr_location *root_al,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2088) u8 *cpumode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2089) u64 ip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2090) bool branch,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2091) struct branch_flags *flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2092) struct iterations *iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2093) u64 branch_from)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2094) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2095) struct map_symbol ms;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2096) struct addr_location al;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2097) int nr_loop_iter = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2098) u64 iter_cycles = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2099) const char *srcline = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2101) al.filtered = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2102) al.sym = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2103) al.srcline = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2104) if (!cpumode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2105) thread__find_cpumode_addr_location(thread, ip, &al);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2106) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2107) if (ip >= PERF_CONTEXT_MAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2108) switch (ip) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2109) case PERF_CONTEXT_HV:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2110) *cpumode = PERF_RECORD_MISC_HYPERVISOR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2111) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2112) case PERF_CONTEXT_KERNEL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2113) *cpumode = PERF_RECORD_MISC_KERNEL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2114) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2115) case PERF_CONTEXT_USER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2116) *cpumode = PERF_RECORD_MISC_USER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2117) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2118) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2119) pr_debug("invalid callchain context: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2120) "%"PRId64"\n", (s64) ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2121) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2122) * It seems the callchain is corrupted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2123) * Discard all.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2124) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2125) callchain_cursor_reset(cursor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2126) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2128) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2130) thread__find_symbol(thread, *cpumode, ip, &al);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2133) if (al.sym != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2134) if (perf_hpp_list.parent && !*parent &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2135) symbol__match_regex(al.sym, &parent_regex))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2136) *parent = al.sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2137) else if (have_ignore_callees && root_al &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2138) symbol__match_regex(al.sym, &ignore_callees_regex)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2139) /* Treat this symbol as the root,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2140) forgetting its callees. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2141) *root_al = al;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2142) callchain_cursor_reset(cursor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2146) if (symbol_conf.hide_unresolved && al.sym == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2147) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2149) if (iter) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2150) nr_loop_iter = iter->nr_loop_iter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2151) iter_cycles = iter->cycles;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2154) ms.maps = al.maps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2155) ms.map = al.map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2156) ms.sym = al.sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2157) srcline = callchain_srcline(&ms, al.addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2158) return callchain_cursor_append(cursor, ip, &ms,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2159) branch, flags, nr_loop_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2160) iter_cycles, branch_from, srcline);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2163) struct branch_info *sample__resolve_bstack(struct perf_sample *sample,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2164) struct addr_location *al)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2166) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2167) const struct branch_stack *bs = sample->branch_stack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2168) struct branch_entry *entries = perf_sample__branch_entries(sample);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2169) struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2171) if (!bi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2172) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2174) for (i = 0; i < bs->nr; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2175) ip__resolve_ams(al->thread, &bi[i].to, entries[i].to);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2176) ip__resolve_ams(al->thread, &bi[i].from, entries[i].from);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2177) bi[i].flags = entries[i].flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2179) return bi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2182) static void save_iterations(struct iterations *iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2183) struct branch_entry *be, int nr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2184) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2185) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2187) iter->nr_loop_iter++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2188) iter->cycles = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2190) for (i = 0; i < nr; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2191) iter->cycles += be[i].flags.cycles;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2194) #define CHASHSZ 127
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2195) #define CHASHBITS 7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2196) #define NO_ENTRY 0xff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2198) #define PERF_MAX_BRANCH_DEPTH 127
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2200) /* Remove loops. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2201) static int remove_loops(struct branch_entry *l, int nr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2202) struct iterations *iter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2203) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2204) int i, j, off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2205) unsigned char chash[CHASHSZ];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2207) memset(chash, NO_ENTRY, sizeof(chash));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2209) BUG_ON(PERF_MAX_BRANCH_DEPTH > 255);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2211) for (i = 0; i < nr; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2212) int h = hash_64(l[i].from, CHASHBITS) % CHASHSZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2214) /* no collision handling for now */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2215) if (chash[h] == NO_ENTRY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2216) chash[h] = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2217) } else if (l[chash[h]].from == l[i].from) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2218) bool is_loop = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2219) /* check if it is a real loop */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2220) off = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2221) for (j = chash[h]; j < i && i + off < nr; j++, off++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2222) if (l[j].from != l[i + off].from) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2223) is_loop = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2224) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2226) if (is_loop) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2227) j = nr - (i + off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2228) if (j > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2229) save_iterations(iter + i + off,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2230) l + i, off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2232) memmove(iter + i, iter + i + off,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2233) j * sizeof(*iter));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2235) memmove(l + i, l + i + off,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2236) j * sizeof(*l));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2239) nr -= off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2243) return nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2246) static int lbr_callchain_add_kernel_ip(struct thread *thread,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2247) struct callchain_cursor *cursor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2248) struct perf_sample *sample,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2249) struct symbol **parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2250) struct addr_location *root_al,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2251) u64 branch_from,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2252) bool callee, int end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2253) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2254) struct ip_callchain *chain = sample->callchain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2255) u8 cpumode = PERF_RECORD_MISC_USER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2256) int err, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2258) if (callee) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2259) for (i = 0; i < end + 1; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2260) err = add_callchain_ip(thread, cursor, parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2261) root_al, &cpumode, chain->ips[i],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2262) false, NULL, NULL, branch_from);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2263) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2264) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2266) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2269) for (i = end; i >= 0; i--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2270) err = add_callchain_ip(thread, cursor, parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2271) root_al, &cpumode, chain->ips[i],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2272) false, NULL, NULL, branch_from);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2273) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2274) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2277) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2280) static void save_lbr_cursor_node(struct thread *thread,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2281) struct callchain_cursor *cursor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2282) int idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2283) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2284) struct lbr_stitch *lbr_stitch = thread->lbr_stitch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2286) if (!lbr_stitch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2287) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2289) if (cursor->pos == cursor->nr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2290) lbr_stitch->prev_lbr_cursor[idx].valid = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2291) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2292) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2294) if (!cursor->curr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2295) cursor->curr = cursor->first;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2296) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2297) cursor->curr = cursor->curr->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2298) memcpy(&lbr_stitch->prev_lbr_cursor[idx], cursor->curr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2299) sizeof(struct callchain_cursor_node));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2301) lbr_stitch->prev_lbr_cursor[idx].valid = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2302) cursor->pos++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2305) static int lbr_callchain_add_lbr_ip(struct thread *thread,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2306) struct callchain_cursor *cursor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2307) struct perf_sample *sample,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2308) struct symbol **parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2309) struct addr_location *root_al,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2310) u64 *branch_from,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2311) bool callee)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2312) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2313) struct branch_stack *lbr_stack = sample->branch_stack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2314) struct branch_entry *entries = perf_sample__branch_entries(sample);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2315) u8 cpumode = PERF_RECORD_MISC_USER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2316) int lbr_nr = lbr_stack->nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2317) struct branch_flags *flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2318) int err, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2319) u64 ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2321) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2322) * The curr and pos are not used in writing session. They are cleared
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2323) * in callchain_cursor_commit() when the writing session is closed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2324) * Using curr and pos to track the current cursor node.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2325) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2326) if (thread->lbr_stitch) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2327) cursor->curr = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2328) cursor->pos = cursor->nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2329) if (cursor->nr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2330) cursor->curr = cursor->first;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2331) for (i = 0; i < (int)(cursor->nr - 1); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2332) cursor->curr = cursor->curr->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2333) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2334) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2336) if (callee) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2337) /* Add LBR ip from first entries.to */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2338) ip = entries[0].to;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2339) flags = &entries[0].flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2340) *branch_from = entries[0].from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2341) err = add_callchain_ip(thread, cursor, parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2342) root_al, &cpumode, ip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2343) true, flags, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2344) *branch_from);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2345) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2346) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2348) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2349) * The number of cursor node increases.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2350) * Move the current cursor node.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2351) * But does not need to save current cursor node for entry 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2352) * It's impossible to stitch the whole LBRs of previous sample.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2353) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2354) if (thread->lbr_stitch && (cursor->pos != cursor->nr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2355) if (!cursor->curr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2356) cursor->curr = cursor->first;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2357) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2358) cursor->curr = cursor->curr->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2359) cursor->pos++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2362) /* Add LBR ip from entries.from one by one. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2363) for (i = 0; i < lbr_nr; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2364) ip = entries[i].from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2365) flags = &entries[i].flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2366) err = add_callchain_ip(thread, cursor, parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2367) root_al, &cpumode, ip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2368) true, flags, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2369) *branch_from);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2370) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2371) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2372) save_lbr_cursor_node(thread, cursor, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2373) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2374) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2375) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2377) /* Add LBR ip from entries.from one by one. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2378) for (i = lbr_nr - 1; i >= 0; i--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2379) ip = entries[i].from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2380) flags = &entries[i].flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2381) err = add_callchain_ip(thread, cursor, parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2382) root_al, &cpumode, ip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2383) true, flags, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2384) *branch_from);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2385) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2386) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2387) save_lbr_cursor_node(thread, cursor, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2388) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2390) /* Add LBR ip from first entries.to */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2391) ip = entries[0].to;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2392) flags = &entries[0].flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2393) *branch_from = entries[0].from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2394) err = add_callchain_ip(thread, cursor, parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2395) root_al, &cpumode, ip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2396) true, flags, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2397) *branch_from);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2398) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2399) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2401) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2402) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2404) static int lbr_callchain_add_stitched_lbr_ip(struct thread *thread,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2405) struct callchain_cursor *cursor)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2406) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2407) struct lbr_stitch *lbr_stitch = thread->lbr_stitch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2408) struct callchain_cursor_node *cnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2409) struct stitch_list *stitch_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2410) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2412) list_for_each_entry(stitch_node, &lbr_stitch->lists, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2413) cnode = &stitch_node->cursor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2415) err = callchain_cursor_append(cursor, cnode->ip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2416) &cnode->ms,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2417) cnode->branch,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2418) &cnode->branch_flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2419) cnode->nr_loop_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2420) cnode->iter_cycles,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2421) cnode->branch_from,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2422) cnode->srcline);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2423) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2424) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2425) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2426) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2427) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2429) static struct stitch_list *get_stitch_node(struct thread *thread)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2430) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2431) struct lbr_stitch *lbr_stitch = thread->lbr_stitch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2432) struct stitch_list *stitch_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2434) if (!list_empty(&lbr_stitch->free_lists)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2435) stitch_node = list_first_entry(&lbr_stitch->free_lists,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2436) struct stitch_list, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2437) list_del(&stitch_node->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2439) return stitch_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2440) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2442) return malloc(sizeof(struct stitch_list));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2443) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2445) static bool has_stitched_lbr(struct thread *thread,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2446) struct perf_sample *cur,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2447) struct perf_sample *prev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2448) unsigned int max_lbr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2449) bool callee)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2450) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2451) struct branch_stack *cur_stack = cur->branch_stack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2452) struct branch_entry *cur_entries = perf_sample__branch_entries(cur);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2453) struct branch_stack *prev_stack = prev->branch_stack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2454) struct branch_entry *prev_entries = perf_sample__branch_entries(prev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2455) struct lbr_stitch *lbr_stitch = thread->lbr_stitch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2456) int i, j, nr_identical_branches = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2457) struct stitch_list *stitch_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2458) u64 cur_base, distance;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2460) if (!cur_stack || !prev_stack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2461) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2463) /* Find the physical index of the base-of-stack for current sample. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2464) cur_base = max_lbr - cur_stack->nr + cur_stack->hw_idx + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2466) distance = (prev_stack->hw_idx > cur_base) ? (prev_stack->hw_idx - cur_base) :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2467) (max_lbr + prev_stack->hw_idx - cur_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2468) /* Previous sample has shorter stack. Nothing can be stitched. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2469) if (distance + 1 > prev_stack->nr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2470) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2472) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2473) * Check if there are identical LBRs between two samples.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2474) * Identicall LBRs must have same from, to and flags values. Also,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2475) * they have to be saved in the same LBR registers (same physical
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2476) * index).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2477) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2478) * Starts from the base-of-stack of current sample.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2479) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2480) for (i = distance, j = cur_stack->nr - 1; (i >= 0) && (j >= 0); i--, j--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2481) if ((prev_entries[i].from != cur_entries[j].from) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2482) (prev_entries[i].to != cur_entries[j].to) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2483) (prev_entries[i].flags.value != cur_entries[j].flags.value))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2484) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2485) nr_identical_branches++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2486) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2488) if (!nr_identical_branches)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2489) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2491) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2492) * Save the LBRs between the base-of-stack of previous sample
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2493) * and the base-of-stack of current sample into lbr_stitch->lists.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2494) * These LBRs will be stitched later.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2495) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2496) for (i = prev_stack->nr - 1; i > (int)distance; i--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2498) if (!lbr_stitch->prev_lbr_cursor[i].valid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2499) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2501) stitch_node = get_stitch_node(thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2502) if (!stitch_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2503) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2505) memcpy(&stitch_node->cursor, &lbr_stitch->prev_lbr_cursor[i],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2506) sizeof(struct callchain_cursor_node));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2508) if (callee)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2509) list_add(&stitch_node->node, &lbr_stitch->lists);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2510) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2511) list_add_tail(&stitch_node->node, &lbr_stitch->lists);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2512) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2513)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2514) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2515) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2517) static bool alloc_lbr_stitch(struct thread *thread, unsigned int max_lbr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2518) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2519) if (thread->lbr_stitch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2520) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2522) thread->lbr_stitch = zalloc(sizeof(*thread->lbr_stitch));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2523) if (!thread->lbr_stitch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2524) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2525)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2526) thread->lbr_stitch->prev_lbr_cursor = calloc(max_lbr + 1, sizeof(struct callchain_cursor_node));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2527) if (!thread->lbr_stitch->prev_lbr_cursor)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2528) goto free_lbr_stitch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2530) INIT_LIST_HEAD(&thread->lbr_stitch->lists);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2531) INIT_LIST_HEAD(&thread->lbr_stitch->free_lists);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2533) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2535) free_lbr_stitch:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2536) zfree(&thread->lbr_stitch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2537) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2538) pr_warning("Failed to allocate space for stitched LBRs. Disable LBR stitch\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2539) thread->lbr_stitch_enable = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2540) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2541) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2543) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2544) * Recolve LBR callstack chain sample
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2545) * Return:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2546) * 1 on success get LBR callchain information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2547) * 0 no available LBR callchain information, should try fp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2548) * negative error code on other errors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2549) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2550) static int resolve_lbr_callchain_sample(struct thread *thread,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2551) struct callchain_cursor *cursor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2552) struct perf_sample *sample,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2553) struct symbol **parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2554) struct addr_location *root_al,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2555) int max_stack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2556) unsigned int max_lbr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2557) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2558) bool callee = (callchain_param.order == ORDER_CALLEE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2559) struct ip_callchain *chain = sample->callchain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2560) int chain_nr = min(max_stack, (int)chain->nr), i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2561) struct lbr_stitch *lbr_stitch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2562) bool stitched_lbr = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2563) u64 branch_from = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2564) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2566) for (i = 0; i < chain_nr; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2567) if (chain->ips[i] == PERF_CONTEXT_USER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2568) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2569) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2571) /* LBR only affects the user callchain */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2572) if (i == chain_nr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2573) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2575) if (thread->lbr_stitch_enable && !sample->no_hw_idx &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2576) (max_lbr > 0) && alloc_lbr_stitch(thread, max_lbr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2577) lbr_stitch = thread->lbr_stitch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2579) stitched_lbr = has_stitched_lbr(thread, sample,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2580) &lbr_stitch->prev_sample,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2581) max_lbr, callee);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2582)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2583) if (!stitched_lbr && !list_empty(&lbr_stitch->lists)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2584) list_replace_init(&lbr_stitch->lists,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2585) &lbr_stitch->free_lists);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2586) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2587) memcpy(&lbr_stitch->prev_sample, sample, sizeof(*sample));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2588) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2590) if (callee) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2591) /* Add kernel ip */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2592) err = lbr_callchain_add_kernel_ip(thread, cursor, sample,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2593) parent, root_al, branch_from,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2594) true, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2595) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2596) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2598) err = lbr_callchain_add_lbr_ip(thread, cursor, sample, parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2599) root_al, &branch_from, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2600) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2601) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2603) if (stitched_lbr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2604) err = lbr_callchain_add_stitched_lbr_ip(thread, cursor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2605) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2606) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2607) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2609) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2610) if (stitched_lbr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2611) err = lbr_callchain_add_stitched_lbr_ip(thread, cursor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2612) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2613) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2614) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2615) err = lbr_callchain_add_lbr_ip(thread, cursor, sample, parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2616) root_al, &branch_from, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2617) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2618) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2619)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2620) /* Add kernel ip */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2621) err = lbr_callchain_add_kernel_ip(thread, cursor, sample,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2622) parent, root_al, branch_from,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2623) false, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2624) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2625) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2626) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2627) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2629) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2630) return (err < 0) ? err : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2631) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2632)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2633) static int find_prev_cpumode(struct ip_callchain *chain, struct thread *thread,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2634) struct callchain_cursor *cursor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2635) struct symbol **parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2636) struct addr_location *root_al,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2637) u8 *cpumode, int ent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2638) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2639) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2641) while (--ent >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2642) u64 ip = chain->ips[ent];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2644) if (ip >= PERF_CONTEXT_MAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2645) err = add_callchain_ip(thread, cursor, parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2646) root_al, cpumode, ip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2647) false, NULL, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2648) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2649) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2650) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2651) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2652) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2653)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2654) static int thread__resolve_callchain_sample(struct thread *thread,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2655) struct callchain_cursor *cursor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2656) struct evsel *evsel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2657) struct perf_sample *sample,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2658) struct symbol **parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2659) struct addr_location *root_al,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2660) int max_stack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2661) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2662) struct branch_stack *branch = sample->branch_stack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2663) struct branch_entry *entries = perf_sample__branch_entries(sample);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2664) struct ip_callchain *chain = sample->callchain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2665) int chain_nr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2666) u8 cpumode = PERF_RECORD_MISC_USER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2667) int i, j, err, nr_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2668) int skip_idx = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2669) int first_call = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2670)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2671) if (chain)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2672) chain_nr = chain->nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2674) if (evsel__has_branch_callstack(evsel)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2675) struct perf_env *env = evsel__env(evsel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2676)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2677) err = resolve_lbr_callchain_sample(thread, cursor, sample, parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2678) root_al, max_stack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2679) !env ? 0 : env->max_branches);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2680) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2681) return (err < 0) ? err : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2682) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2683)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2684) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2685) * Based on DWARF debug information, some architectures skip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2686) * a callchain entry saved by the kernel.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2687) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2688) skip_idx = arch_skip_callchain_idx(thread, chain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2690) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2691) * Add branches to call stack for easier browsing. This gives
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2692) * more context for a sample than just the callers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2693) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2694) * This uses individual histograms of paths compared to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2695) * aggregated histograms the normal LBR mode uses.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2696) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2697) * Limitations for now:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2698) * - No extra filters
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2699) * - No annotations (should annotate somehow)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2700) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2701)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2702) if (branch && callchain_param.branch_callstack) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2703) int nr = min(max_stack, (int)branch->nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2704) struct branch_entry be[nr];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2705) struct iterations iter[nr];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2706)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2707) if (branch->nr > PERF_MAX_BRANCH_DEPTH) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2708) pr_warning("corrupted branch chain. skipping...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2709) goto check_calls;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2710) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2711)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2712) for (i = 0; i < nr; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2713) if (callchain_param.order == ORDER_CALLEE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2714) be[i] = entries[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2716) if (chain == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2717) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2719) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2720) * Check for overlap into the callchain.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2721) * The return address is one off compared to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2722) * the branch entry. To adjust for this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2723) * assume the calling instruction is not longer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2724) * than 8 bytes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2725) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2726) if (i == skip_idx ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2727) chain->ips[first_call] >= PERF_CONTEXT_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2728) first_call++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2729) else if (be[i].from < chain->ips[first_call] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2730) be[i].from >= chain->ips[first_call] - 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2731) first_call++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2732) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2733) be[i] = entries[branch->nr - i - 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2734) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2736) memset(iter, 0, sizeof(struct iterations) * nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2737) nr = remove_loops(be, nr, iter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2738)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2739) for (i = 0; i < nr; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2740) err = add_callchain_ip(thread, cursor, parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2741) root_al,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2742) NULL, be[i].to,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2743) true, &be[i].flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2744) NULL, be[i].from);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2745)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2746) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2747) err = add_callchain_ip(thread, cursor, parent, root_al,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2748) NULL, be[i].from,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2749) true, &be[i].flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2750) &iter[i], 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2751) if (err == -EINVAL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2752) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2753) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2754) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2755) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2756)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2757) if (chain_nr == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2758) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2759)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2760) chain_nr -= nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2761) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2762)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2763) check_calls:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2764) if (chain && callchain_param.order != ORDER_CALLEE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2765) err = find_prev_cpumode(chain, thread, cursor, parent, root_al,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2766) &cpumode, chain->nr - first_call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2767) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2768) return (err < 0) ? err : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2769) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2770) for (i = first_call, nr_entries = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2771) i < chain_nr && nr_entries < max_stack; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2772) u64 ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2773)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2774) if (callchain_param.order == ORDER_CALLEE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2775) j = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2776) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2777) j = chain->nr - i - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2778)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2779) #ifdef HAVE_SKIP_CALLCHAIN_IDX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2780) if (j == skip_idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2781) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2782) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2783) ip = chain->ips[j];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2784) if (ip < PERF_CONTEXT_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2785) ++nr_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2786) else if (callchain_param.order != ORDER_CALLEE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2787) err = find_prev_cpumode(chain, thread, cursor, parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2788) root_al, &cpumode, j);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2789) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2790) return (err < 0) ? err : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2791) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2792) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2793)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2794) err = add_callchain_ip(thread, cursor, parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2795) root_al, &cpumode, ip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2796) false, NULL, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2797)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2798) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2799) return (err < 0) ? err : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2800) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2802) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2803) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2804)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2805) static int append_inlines(struct callchain_cursor *cursor, struct map_symbol *ms, u64 ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2806) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2807) struct symbol *sym = ms->sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2808) struct map *map = ms->map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2809) struct inline_node *inline_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2810) struct inline_list *ilist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2811) u64 addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2812) int ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2813)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2814) if (!symbol_conf.inline_name || !map || !sym)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2815) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2816)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2817) addr = map__map_ip(map, ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2818) addr = map__rip_2objdump(map, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2819)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2820) inline_node = inlines__tree_find(&map->dso->inlined_nodes, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2821) if (!inline_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2822) inline_node = dso__parse_addr_inlines(map->dso, addr, sym);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2823) if (!inline_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2824) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2825) inlines__tree_insert(&map->dso->inlined_nodes, inline_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2826) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2827)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2828) list_for_each_entry(ilist, &inline_node->val, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2829) struct map_symbol ilist_ms = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2830) .maps = ms->maps,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2831) .map = map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2832) .sym = ilist->symbol,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2833) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2834) ret = callchain_cursor_append(cursor, ip, &ilist_ms, false,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2835) NULL, 0, 0, 0, ilist->srcline);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2836)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2837) if (ret != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2838) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2839) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2840)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2841) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2842) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2843)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2844) static int unwind_entry(struct unwind_entry *entry, void *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2845) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2846) struct callchain_cursor *cursor = arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2847) const char *srcline = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2848) u64 addr = entry->ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2849)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2850) if (symbol_conf.hide_unresolved && entry->ms.sym == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2851) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2852)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2853) if (append_inlines(cursor, &entry->ms, entry->ip) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2854) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2855)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2856) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2857) * Convert entry->ip from a virtual address to an offset in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2858) * its corresponding binary.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2859) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2860) if (entry->ms.map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2861) addr = map__map_ip(entry->ms.map, entry->ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2862)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2863) srcline = callchain_srcline(&entry->ms, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2864) return callchain_cursor_append(cursor, entry->ip, &entry->ms,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2865) false, NULL, 0, 0, 0, srcline);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2866) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2867)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2868) static int thread__resolve_callchain_unwind(struct thread *thread,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2869) struct callchain_cursor *cursor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2870) struct evsel *evsel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2871) struct perf_sample *sample,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2872) int max_stack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2873) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2874) /* Can we do dwarf post unwind? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2875) if (!((evsel->core.attr.sample_type & PERF_SAMPLE_REGS_USER) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2876) (evsel->core.attr.sample_type & PERF_SAMPLE_STACK_USER)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2877) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2878)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2879) /* Bail out if nothing was captured. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2880) if ((!sample->user_regs.regs) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2881) (!sample->user_stack.size))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2882) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2883)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2884) return unwind__get_entries(unwind_entry, cursor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2885) thread, sample, max_stack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2886) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2887)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2888) int thread__resolve_callchain(struct thread *thread,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2889) struct callchain_cursor *cursor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2890) struct evsel *evsel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2891) struct perf_sample *sample,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2892) struct symbol **parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2893) struct addr_location *root_al,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2894) int max_stack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2895) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2896) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2897)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2898) callchain_cursor_reset(cursor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2899)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2900) if (callchain_param.order == ORDER_CALLEE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2901) ret = thread__resolve_callchain_sample(thread, cursor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2902) evsel, sample,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2903) parent, root_al,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2904) max_stack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2905) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2906) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2907) ret = thread__resolve_callchain_unwind(thread, cursor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2908) evsel, sample,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2909) max_stack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2910) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2911) ret = thread__resolve_callchain_unwind(thread, cursor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2912) evsel, sample,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2913) max_stack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2914) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2915) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2916) ret = thread__resolve_callchain_sample(thread, cursor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2917) evsel, sample,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2918) parent, root_al,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2919) max_stack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2920) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2921)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2922) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2923) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2924)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2925) int machine__for_each_thread(struct machine *machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2926) int (*fn)(struct thread *thread, void *p),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2927) void *priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2928) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2929) struct threads *threads;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2930) struct rb_node *nd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2931) struct thread *thread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2932) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2933) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2934)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2935) for (i = 0; i < THREADS__TABLE_SIZE; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2936) threads = &machine->threads[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2937) for (nd = rb_first_cached(&threads->entries); nd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2938) nd = rb_next(nd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2939) thread = rb_entry(nd, struct thread, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2940) rc = fn(thread, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2941) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2942) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2943) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2944)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2945) list_for_each_entry(thread, &threads->dead, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2946) rc = fn(thread, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2947) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2948) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2949) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2950) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2951) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2952) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2953)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2954) int machines__for_each_thread(struct machines *machines,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2955) int (*fn)(struct thread *thread, void *p),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2956) void *priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2957) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2958) struct rb_node *nd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2959) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2960)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2961) rc = machine__for_each_thread(&machines->host, fn, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2962) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2963) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2964)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2965) for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2966) struct machine *machine = rb_entry(nd, struct machine, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2967)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2968) rc = machine__for_each_thread(machine, fn, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2969) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2970) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2971) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2972) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2973) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2974)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2975) pid_t machine__get_current_tid(struct machine *machine, int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2976) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2977) int nr_cpus = min(machine->env->nr_cpus_avail, MAX_NR_CPUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2978)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2979) if (cpu < 0 || cpu >= nr_cpus || !machine->current_tid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2980) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2981)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2982) return machine->current_tid[cpu];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2983) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2984)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2985) int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2986) pid_t tid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2987) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2988) struct thread *thread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2989) int nr_cpus = min(machine->env->nr_cpus_avail, MAX_NR_CPUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2990)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2991) if (cpu < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2992) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2993)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2994) if (!machine->current_tid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2995) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2996)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2997) machine->current_tid = calloc(nr_cpus, sizeof(pid_t));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2998) if (!machine->current_tid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2999) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3000) for (i = 0; i < nr_cpus; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3001) machine->current_tid[i] = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3002) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3003)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3004) if (cpu >= nr_cpus) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3005) pr_err("Requested CPU %d too large. ", cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3006) pr_err("Consider raising MAX_NR_CPUS\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3007) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3008) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3009)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3010) machine->current_tid[cpu] = tid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3011)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3012) thread = machine__findnew_thread(machine, pid, tid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3013) if (!thread)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3014) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3015)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3016) thread->cpu = cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3017) thread__put(thread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3018)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3019) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3020) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3021)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3022) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3023) * Compares the raw arch string. N.B. see instead perf_env__arch() if a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3024) * normalized arch is needed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3025) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3026) bool machine__is(struct machine *machine, const char *arch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3027) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3028) return machine && !strcmp(perf_env__raw_arch(machine->env), arch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3029) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3030)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3031) int machine__nr_cpus_avail(struct machine *machine)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3032) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3033) return machine ? perf_env__nr_cpus_avail(machine->env) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3034) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3035)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3036) int machine__get_kernel_start(struct machine *machine)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3037) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3038) struct map *map = machine__kernel_map(machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3039) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3040)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3041) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3042) * The only addresses above 2^63 are kernel addresses of a 64-bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3043) * kernel. Note that addresses are unsigned so that on a 32-bit system
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3044) * all addresses including kernel addresses are less than 2^32. In
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3045) * that case (32-bit system), if the kernel mapping is unknown, all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3046) * addresses will be assumed to be in user space - see
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3047) * machine__kernel_ip().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3048) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3049) machine->kernel_start = 1ULL << 63;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3050) if (map) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3051) err = map__load(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3052) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3053) * On x86_64, PTI entry trampolines are less than the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3054) * start of kernel text, but still above 2^63. So leave
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3055) * kernel_start = 1ULL << 63 for x86_64.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3056) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3057) if (!err && !machine__is(machine, "x86_64"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3058) machine->kernel_start = map->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3059) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3060) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3061) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3062)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3063) u8 machine__addr_cpumode(struct machine *machine, u8 cpumode, u64 addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3064) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3065) u8 addr_cpumode = cpumode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3066) bool kernel_ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3067)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3068) if (!machine->single_address_space)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3069) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3070)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3071) kernel_ip = machine__kernel_ip(machine, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3072) switch (cpumode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3073) case PERF_RECORD_MISC_KERNEL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3074) case PERF_RECORD_MISC_USER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3075) addr_cpumode = kernel_ip ? PERF_RECORD_MISC_KERNEL :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3076) PERF_RECORD_MISC_USER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3077) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3078) case PERF_RECORD_MISC_GUEST_KERNEL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3079) case PERF_RECORD_MISC_GUEST_USER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3080) addr_cpumode = kernel_ip ? PERF_RECORD_MISC_GUEST_KERNEL :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3081) PERF_RECORD_MISC_GUEST_USER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3082) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3083) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3084) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3085) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3086) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3087) return addr_cpumode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3088) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3089)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3090) struct dso *machine__findnew_dso_id(struct machine *machine, const char *filename, struct dso_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3091) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3092) return dsos__findnew_id(&machine->dsos, filename, id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3093) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3094)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3095) struct dso *machine__findnew_dso(struct machine *machine, const char *filename)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3096) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3097) return machine__findnew_dso_id(machine, filename, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3098) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3099)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3100) char *machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3102) struct machine *machine = vmachine;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3103) struct map *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3104) struct symbol *sym = machine__find_kernel_symbol(machine, *addrp, &map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3106) if (sym == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3107) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3109) *modp = __map__is_kmodule(map) ? (char *)map->dso->short_name : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3110) *addrp = map->unmap_ip(map, sym->start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3111) return sym->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3114) int machine__for_each_dso(struct machine *machine, machine__dso_t fn, void *priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3116) struct dso *pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3117) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3119) list_for_each_entry(pos, &machine->dsos.head, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3120) if (fn(pos, machine, priv))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3121) err = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3123) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3124) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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