Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0-only 
 
#include "util/debug.h"
#include "util/dso.h"
#include "util/event.h"
#include "util/evlist.h"
#include "util/machine.h"
#include "util/map.h"
#include "util/map_symbol.h"
#include "util/branch.h"
#include "util/memswap.h"
#include "util/namespaces.h"
#include "util/session.h"
#include "util/stat.h"
#include "util/symbol.h"
#include "util/synthetic-events.h"
#include "util/target.h"
#include "util/time-utils.h"
#include "util/cgroup.h"
#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/zalloc.h>
#include <linux/perf_event.h>
#include <asm/bug.h>
#include <perf/evsel.h>
#include <internal/cpumap.h>
#include <perf/cpumap.h>
#include <internal/lib.h> // page_size
#include <internal/threadmap.h>
#include <perf/threadmap.h>
#include <symbol/kallsyms.h>
#include <dirent.h>
#include <errno.h>
#include <inttypes.h>
#include <stdio.h>
#include <string.h>
#include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
#include <api/fs/fs.h>
#include <api/io.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
 
#define DEFAULT_PROC_MAP_PARSE_TIMEOUT 500
 
unsigned int proc_map_timeout = DEFAULT_PROC_MAP_PARSE_TIMEOUT;
 
int perf_tool__process_synth_event(struct perf_tool *tool,
<------><------><------><------>   union perf_event *event,
<------><------><------><------>   struct machine *machine,
<------><------><------><------>   perf_event__handler_t process)
{
<------>struct perf_sample synth_sample = {
<------><------>.pid	   = -1,
<------><------>.tid	   = -1,
<------><------>.time	   = -1,
<------><------>.stream_id = -1,
<------><------>.cpu	   = -1,
<------><------>.period	   = 1,
<------><------>.cpumode   = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
<------>};
 
<------>return process(tool, event, &synth_sample, machine);
};
 
/*
 * Assumes that the first 4095 bytes of /proc/pid/stat contains
 * the comm, tgid and ppid.
 */
static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
<------><------><------><------>    pid_t *tgid, pid_t *ppid)
{
<------>char bf[4096];
<------>int fd;
<------>size_t size = 0;
<------>ssize_t n;
<------>char *name, *tgids, *ppids;
 
<------>*tgid = -1;
<------>*ppid = -1;
 
<------>snprintf(bf, sizeof(bf), "/proc/%d/status", pid);
 
<------>fd = open(bf, O_RDONLY);
<------>if (fd < 0) {
<------><------>pr_debug("couldn't open %s\n", bf);
<------><------>return -1;
<------>}
 
<------>n = read(fd, bf, sizeof(bf) - 1);
<------>close(fd);
<------>if (n <= 0) {
<------><------>pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
<------><------><------>   pid);
<------><------>return -1;
<------>}
<------>bf[n] = '\0';
 
<------>name = strstr(bf, "Name:");
<------>tgids = strstr(bf, "Tgid:");
<------>ppids = strstr(bf, "PPid:");
 
<------>if (name) {
<------><------>char *nl;
 
<------><------>name = skip_spaces(name + 5);  /* strlen("Name:") */
<------><------>nl = strchr(name, '\n');
<------><------>if (nl)
<------><------><------>*nl = '\0';
 
<------><------>size = strlen(name);
<------><------>if (size >= len)
<------><------><------>size = len - 1;
<------><------>memcpy(comm, name, size);
<------><------>comm[size] = '\0';
<------>} else {
<------><------>pr_debug("Name: string not found for pid %d\n", pid);
<------>}
 
<------>if (tgids) {
<------><------>tgids += 5;  /* strlen("Tgid:") */
<------><------>*tgid = atoi(tgids);
<------>} else {
<------><------>pr_debug("Tgid: string not found for pid %d\n", pid);
<------>}
 
<------>if (ppids) {
<------><------>ppids += 5;  /* strlen("PPid:") */
<------><------>*ppid = atoi(ppids);
<------>} else {
<------><------>pr_debug("PPid: string not found for pid %d\n", pid);
<------>}
 
<------>return 0;
}
 
static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
<------><------><------><------>    struct machine *machine,
<------><------><------><------>    pid_t *tgid, pid_t *ppid)
{
<------>size_t size;
 
<------>*ppid = -1;
 
<------>memset(&event->comm, 0, sizeof(event->comm));
 
<------>if (machine__is_host(machine)) {
<------><------>if (perf_event__get_comm_ids(pid, event->comm.comm,
<------><------><------><------><------>     sizeof(event->comm.comm),
<------><------><------><------><------>     tgid, ppid) != 0) {
<------><------><------>return -1;
<------><------>}
<------>} else {
<------><------>*tgid = machine->pid;
<------>}
 
<------>if (*tgid < 0)
<------><------>return -1;
 
<------>event->comm.pid = *tgid;
<------>event->comm.header.type = PERF_RECORD_COMM;
 
<------>size = strlen(event->comm.comm) + 1;
<------>size = PERF_ALIGN(size, sizeof(u64));
<------>memset(event->comm.comm + size, 0, machine->id_hdr_size);
<------>event->comm.header.size = (sizeof(event->comm) -
<------><------><------><------>(sizeof(event->comm.comm) - size) +
<------><------><------><------>machine->id_hdr_size);
<------>event->comm.tid = pid;
 
<------>return 0;
}
 
pid_t perf_event__synthesize_comm(struct perf_tool *tool,
<------><------><------><------><------> union perf_event *event, pid_t pid,
<------><------><------><------><------> perf_event__handler_t process,
<------><------><------><------><------> struct machine *machine)
{
<------>pid_t tgid, ppid;
 
<------>if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
<------><------>return -1;
 
<------>if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
<------><------>return -1;
 
<------>return tgid;
}
 
static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
<------><------><------><------><------> struct perf_ns_link_info *ns_link_info)
{
<------>struct stat64 st;
<------>char proc_ns[128];
 
<------>sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
<------>if (stat64(proc_ns, &st) == 0) {
<------><------>ns_link_info->dev = st.st_dev;
<------><------>ns_link_info->ino = st.st_ino;
<------>}
}
 
int perf_event__synthesize_namespaces(struct perf_tool *tool,
<------><------><------><------>      union perf_event *event,
<------><------><------><------>      pid_t pid, pid_t tgid,
<------><------><------><------>      perf_event__handler_t process,
<------><------><------><------>      struct machine *machine)
{
<------>u32 idx;
<------>struct perf_ns_link_info *ns_link_info;
 
<------>if (!tool || !tool->namespace_events)
<------><------>return 0;
 
<------>memset(&event->namespaces, 0, (sizeof(event->namespaces) +
<------>       (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
<------>       machine->id_hdr_size));
 
<------>event->namespaces.pid = tgid;
<------>event->namespaces.tid = pid;
 
<------>event->namespaces.nr_namespaces = NR_NAMESPACES;
 
<------>ns_link_info = event->namespaces.link_info;
 
<------>for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
<------><------>perf_event__get_ns_link_info(pid, perf_ns__name(idx),
<------><------><------><------><------>     &ns_link_info[idx]);
 
<------>event->namespaces.header.type = PERF_RECORD_NAMESPACES;
 
<------>event->namespaces.header.size = (sizeof(event->namespaces) +
<------><------><------>(NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
<------><------><------>machine->id_hdr_size);
 
<------>if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
<------><------>return -1;
 
<------>return 0;
}
 
static int perf_event__synthesize_fork(struct perf_tool *tool,
<------><------><------><------>       union perf_event *event,
<------><------><------><------>       pid_t pid, pid_t tgid, pid_t ppid,
<------><------><------><------>       perf_event__handler_t process,
<------><------><------><------>       struct machine *machine)
{
<------>memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
 
<------>/*
<------> * for main thread set parent to ppid from status file. For other
<------> * threads set parent pid to main thread. ie., assume main thread
<------> * spawns all threads in a process
<------>*/
<------>if (tgid == pid) {
<------><------>event->fork.ppid = ppid;
<------><------>event->fork.ptid = ppid;
<------>} else {
<------><------>event->fork.ppid = tgid;
<------><------>event->fork.ptid = tgid;
<------>}
<------>event->fork.pid  = tgid;
<------>event->fork.tid  = pid;
<------>event->fork.header.type = PERF_RECORD_FORK;
<------>event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC;
 
<------>event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
 
<------>if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
<------><------>return -1;
 
<------>return 0;
}
 
static bool read_proc_maps_line(struct io *io, __u64 *start, __u64 *end,
<------><------><------><------>u32 *prot, u32 *flags, __u64 *offset,
<------><------><------><------>u32 *maj, u32 *min,
<------><------><------><------>__u64 *inode,
<------><------><------><------>ssize_t pathname_size, char *pathname)
{
<------>__u64 temp;
<------>int ch;
<------>char *start_pathname = pathname;
 
<------>if (io__get_hex(io, start) != '-')
<------><------>return false;
<------>if (io__get_hex(io, end) != ' ')
<------><------>return false;
 
<------>/* map protection and flags bits */
<------>*prot = 0;
<------>ch = io__get_char(io);
<------>if (ch == 'r')
<------><------>*prot |= PROT_READ;
<------>else if (ch != '-')
<------><------>return false;
<------>ch = io__get_char(io);
<------>if (ch == 'w')
<------><------>*prot |= PROT_WRITE;
<------>else if (ch != '-')
<------><------>return false;
<------>ch = io__get_char(io);
<------>if (ch == 'x')
<------><------>*prot |= PROT_EXEC;
<------>else if (ch != '-')
<------><------>return false;
<------>ch = io__get_char(io);
<------>if (ch == 's')
<------><------>*flags = MAP_SHARED;
<------>else if (ch == 'p')
<------><------>*flags = MAP_PRIVATE;
<------>else
<------><------>return false;
<------>if (io__get_char(io) != ' ')
<------><------>return false;
 
<------>if (io__get_hex(io, offset) != ' ')
<------><------>return false;
 
<------>if (io__get_hex(io, &temp) != ':')
<------><------>return false;
<------>*maj = temp;
<------>if (io__get_hex(io, &temp) != ' ')
<------><------>return false;
<------>*min = temp;
 
<------>ch = io__get_dec(io, inode);
<------>if (ch != ' ') {
<------><------>*pathname = '\0';
<------><------>return ch == '\n';
<------>}
<------>do {
<------><------>ch = io__get_char(io);
<------>} while (ch == ' ');
<------>while (true) {
<------><------>if (ch < 0)
<------><------><------>return false;
<------><------>if (ch == '\0' || ch == '\n' ||
<------><------>    (pathname + 1 - start_pathname) >= pathname_size) {
<------><------><------>*pathname = '\0';
<------><------><------>return true;
<------><------>}
<------><------>*pathname++ = ch;
<------><------>ch = io__get_char(io);
<------>}
}
 
int perf_event__synthesize_mmap_events(struct perf_tool *tool,
<------><------><------><------>       union perf_event *event,
<------><------><------><------>       pid_t pid, pid_t tgid,
<------><------><------><------>       perf_event__handler_t process,
<------><------><------><------>       struct machine *machine,
<------><------><------><------>       bool mmap_data)
{
<------>unsigned long long t;
<------>char bf[BUFSIZ];
<------>struct io io;
<------>bool truncation = false;
<------>unsigned long long timeout = proc_map_timeout * 1000000ULL;
<------>int rc = 0;
<------>const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
<------>int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
 
<------>if (machine__is_default_guest(machine))
<------><------>return 0;
 
<------>snprintf(bf, sizeof(bf), "%s/proc/%d/task/%d/maps",
<------><------>machine->root_dir, pid, pid);
 
<------>io.fd = open(bf, O_RDONLY, 0);
<------>if (io.fd < 0) {
<------><------>/*
<------><------> * We raced with a task exiting - just return:
<------><------> */
<------><------>pr_debug("couldn't open %s\n", bf);
<------><------>return -1;
<------>}
<------>io__init(&io, io.fd, bf, sizeof(bf));
 
<------>event->header.type = PERF_RECORD_MMAP2;
<------>t = rdclock();
 
<------>while (!io.eof) {
<------><------>static const char anonstr[] = "//anon";
<------><------>size_t size, aligned_size;
 
<------><------>/* ensure null termination since stack will be reused. */
<------><------>event->mmap2.filename[0] = '\0';
 
<------><------>/* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
<------><------>if (!read_proc_maps_line(&io,
<------><------><------><------><------>&event->mmap2.start,
<------><------><------><------><------>&event->mmap2.len,
<------><------><------><------><------>&event->mmap2.prot,
<------><------><------><------><------>&event->mmap2.flags,
<------><------><------><------><------>&event->mmap2.pgoff,
<------><------><------><------><------>&event->mmap2.maj,
<------><------><------><------><------>&event->mmap2.min,
<------><------><------><------><------>&event->mmap2.ino,
<------><------><------><------><------>sizeof(event->mmap2.filename),
<------><------><------><------><------>event->mmap2.filename))
<------><------><------>continue;
 
<------><------>if ((rdclock() - t) > timeout) {
<------><------><------>pr_warning("Reading %s/proc/%d/task/%d/maps time out. "
<------><------><------><------>   "You may want to increase "
<------><------><------><------>   "the time limit by --proc-map-timeout\n",
<------><------><------><------>   machine->root_dir, pid, pid);
<------><------><------>truncation = true;
<------><------><------>goto out;
<------><------>}
 
<------><------>event->mmap2.ino_generation = 0;
 
<------><------>/*
<------><------> * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
<------><------> */
<------><------>if (machine__is_host(machine))
<------><------><------>event->header.misc = PERF_RECORD_MISC_USER;
<------><------>else
<------><------><------>event->header.misc = PERF_RECORD_MISC_GUEST_USER;
 
<------><------>if ((event->mmap2.prot & PROT_EXEC) == 0) {
<------><------><------>if (!mmap_data || (event->mmap2.prot & PROT_READ) == 0)
<------><------><------><------>continue;
 
<------><------><------>event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
<------><------>}
 
out:
<------><------>if (truncation)
<------><------><------>event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
 
<------><------>if (!strcmp(event->mmap2.filename, ""))
<------><------><------>strcpy(event->mmap2.filename, anonstr);
 
<------><------>if (hugetlbfs_mnt_len &&
<------><------>    !strncmp(event->mmap2.filename, hugetlbfs_mnt,
<------><------><------>     hugetlbfs_mnt_len)) {
<------><------><------>strcpy(event->mmap2.filename, anonstr);
<------><------><------>event->mmap2.flags |= MAP_HUGETLB;
<------><------>}
 
<------><------>size = strlen(event->mmap2.filename) + 1;
<------><------>aligned_size = PERF_ALIGN(size, sizeof(u64));
<------><------>event->mmap2.len -= event->mmap.start;
<------><------>event->mmap2.header.size = (sizeof(event->mmap2) -
<------><------><------><------><------>(sizeof(event->mmap2.filename) - aligned_size));
<------><------>memset(event->mmap2.filename + size, 0, machine->id_hdr_size +
<------><------><------>(aligned_size - size));
<------><------>event->mmap2.header.size += machine->id_hdr_size;
<------><------>event->mmap2.pid = tgid;
<------><------>event->mmap2.tid = pid;
 
<------><------>if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
<------><------><------>rc = -1;
<------><------><------>break;
<------><------>}
 
<------><------>if (truncation)
<------><------><------>break;
<------>}
 
<------>close(io.fd);
<------>return rc;
}
 
#ifdef HAVE_FILE_HANDLE
static int perf_event__synthesize_cgroup(struct perf_tool *tool,
<------><------><------><------><------> union perf_event *event,
<------><------><------><------><------> char *path, size_t mount_len,
<------><------><------><------><------> perf_event__handler_t process,
<------><------><------><------><------> struct machine *machine)
{
<------>size_t event_size = sizeof(event->cgroup) - sizeof(event->cgroup.path);
<------>size_t path_len = strlen(path) - mount_len + 1;
<------>struct {
<------><------>struct file_handle fh;
<------><------>uint64_t cgroup_id;
<------>} handle;
<------>int mount_id;
 
<------>while (path_len % sizeof(u64))
<------><------>path[mount_len + path_len++] = '\0';
 
<------>memset(&event->cgroup, 0, event_size);
 
<------>event->cgroup.header.type = PERF_RECORD_CGROUP;
<------>event->cgroup.header.size = event_size + path_len + machine->id_hdr_size;
 
<------>handle.fh.handle_bytes = sizeof(handle.cgroup_id);
<------>if (name_to_handle_at(AT_FDCWD, path, &handle.fh, &mount_id, 0) < 0) {
<------><------>pr_debug("stat failed: %s\n", path);
<------><------>return -1;
<------>}
 
<------>event->cgroup.id = handle.cgroup_id;
<------>strncpy(event->cgroup.path, path + mount_len, path_len);
<------>memset(event->cgroup.path + path_len, 0, machine->id_hdr_size);
 
<------>if (perf_tool__process_synth_event(tool, event, machine, process) < 0) {
<------><------>pr_debug("process synth event failed\n");
<------><------>return -1;
<------>}
 
<------>return 0;
}
 
static int perf_event__walk_cgroup_tree(struct perf_tool *tool,
<------><------><------><------><------>union perf_event *event,
<------><------><------><------><------>char *path, size_t mount_len,
<------><------><------><------><------>perf_event__handler_t process,
<------><------><------><------><------>struct machine *machine)
{
<------>size_t pos = strlen(path);
<------>DIR *d;
<------>struct dirent *dent;
<------>int ret = 0;
 
<------>if (perf_event__synthesize_cgroup(tool, event, path, mount_len,
<------><------><------><------><------>  process, machine) < 0)
<------><------>return -1;
 
<------>d = opendir(path);
<------>if (d == NULL) {
<------><------>pr_debug("failed to open directory: %s\n", path);
<------><------>return -1;
<------>}
 
<------>while ((dent = readdir(d)) != NULL) {
<------><------>if (dent->d_type != DT_DIR)
<------><------><------>continue;
<------><------>if (!strcmp(dent->d_name, ".") ||
<------><------>    !strcmp(dent->d_name, ".."))
<------><------><------>continue;
 
<------><------>/* any sane path should be less than PATH_MAX */
<------><------>if (strlen(path) + strlen(dent->d_name) + 1 >= PATH_MAX)
<------><------><------>continue;
 
<------><------>if (path[pos - 1] != '/')
<------><------><------>strcat(path, "/");
<------><------>strcat(path, dent->d_name);
 
<------><------>ret = perf_event__walk_cgroup_tree(tool, event, path,
<------><------><------><------><------><------>   mount_len, process, machine);
<------><------>if (ret < 0)
<------><------><------>break;
 
<------><------>path[pos] = '\0';
<------>}
 
<------>closedir(d);
<------>return ret;
}
 
int perf_event__synthesize_cgroups(struct perf_tool *tool,
<------><------><------><------>   perf_event__handler_t process,
<------><------><------><------>   struct machine *machine)
{
<------>union perf_event event;
<------>char cgrp_root[PATH_MAX];
<------>size_t mount_len;  /* length of mount point in the path */
 
<------>if (!tool || !tool->cgroup_events)
<------><------>return 0;
 
<------>if (cgroupfs_find_mountpoint(cgrp_root, PATH_MAX, "perf_event") < 0) {
<------><------>pr_debug("cannot find cgroup mount point\n");
<------><------>return -1;
<------>}
 
<------>mount_len = strlen(cgrp_root);
<------>/* make sure the path starts with a slash (after mount point) */
<------>strcat(cgrp_root, "/");
 
<------>if (perf_event__walk_cgroup_tree(tool, &event, cgrp_root, mount_len,
<------><------><------><------><------> process, machine) < 0)
<------><------>return -1;
 
<------>return 0;
}
#else
int perf_event__synthesize_cgroups(struct perf_tool *tool __maybe_unused,
<------><------><------><------>   perf_event__handler_t process __maybe_unused,
<------><------><------><------>   struct machine *machine __maybe_unused)
{
<------>return -1;
}
#endif
 
int perf_event__synthesize_modules(struct perf_tool *tool, perf_event__handler_t process,
<------><------><------><------>   struct machine *machine)
{
<------>int rc = 0;
<------>struct map *pos;
<------>struct maps *maps = machine__kernel_maps(machine);
<------>union perf_event *event = zalloc((sizeof(event->mmap) +
<------><------><------><------><------>  machine->id_hdr_size));
<------>if (event == NULL) {
<------><------>pr_debug("Not enough memory synthesizing mmap event "
<------><------><------> "for kernel modules\n");
<------><------>return -1;
<------>}
 
<------>event->header.type = PERF_RECORD_MMAP;
 
<------>/*
<------> * kernel uses 0 for user space maps, see kernel/perf_event.c
<------> * __perf_event_mmap
<------> */
<------>if (machine__is_host(machine))
<------><------>event->header.misc = PERF_RECORD_MISC_KERNEL;
<------>else
<------><------>event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 
<------>maps__for_each_entry(maps, pos) {
<------><------>size_t size;
 
<------><------>if (!__map__is_kmodule(pos))
<------><------><------>continue;
 
<------><------>size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
<------><------>event->mmap.header.type = PERF_RECORD_MMAP;
<------><------>event->mmap.header.size = (sizeof(event->mmap) -
<------><------><------><------>        (sizeof(event->mmap.filename) - size));
<------><------>memset(event->mmap.filename + size, 0, machine->id_hdr_size);
<------><------>event->mmap.header.size += machine->id_hdr_size;
<------><------>event->mmap.start = pos->start;
<------><------>event->mmap.len   = pos->end - pos->start;
<------><------>event->mmap.pid   = machine->pid;
 
<------><------>memcpy(event->mmap.filename, pos->dso->long_name,
<------><------>       pos->dso->long_name_len + 1);
<------><------>if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
<------><------><------>rc = -1;
<------><------><------>break;
<------><------>}
<------>}
 
<------>free(event);
<------>return rc;
}
 
static int __event__synthesize_thread(union perf_event *comm_event,
<------><------><------><------>      union perf_event *mmap_event,
<------><------><------><------>      union perf_event *fork_event,
<------><------><------><------>      union perf_event *namespaces_event,
<------><------><------><------>      pid_t pid, int full, perf_event__handler_t process,
<------><------><------><------>      struct perf_tool *tool, struct machine *machine, bool mmap_data)
{
<------>char filename[PATH_MAX];
<------>DIR *tasks;
<------>struct dirent *dirent;
<------>pid_t tgid, ppid;
<------>int rc = 0;
 
<------>/* special case: only send one comm event using passed in pid */
<------>if (!full) {
<------><------>tgid = perf_event__synthesize_comm(tool, comm_event, pid,
<------><------><------><------><------><------>   process, machine);
 
<------><------>if (tgid == -1)
<------><------><------>return -1;
 
<------><------>if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
<------><------><------><------><------><------>      tgid, process, machine) < 0)
<------><------><------>return -1;
 
<------><------>/*
<------><------> * send mmap only for thread group leader
<------><------> * see thread__init_maps()
<------><------> */
<------><------>if (pid == tgid &&
<------><------>    perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
<------><------><------><------><------><------>       process, machine, mmap_data))
<------><------><------>return -1;
 
<------><------>return 0;
<------>}
 
<------>if (machine__is_default_guest(machine))
<------><------>return 0;
 
<------>snprintf(filename, sizeof(filename), "%s/proc/%d/task",
<------><------> machine->root_dir, pid);
 
<------>tasks = opendir(filename);
<------>if (tasks == NULL) {
<------><------>pr_debug("couldn't open %s\n", filename);
<------><------>return 0;
<------>}
 
<------>while ((dirent = readdir(tasks)) != NULL) {
<------><------>char *end;
<------><------>pid_t _pid;
 
<------><------>_pid = strtol(dirent->d_name, &end, 10);
<------><------>if (*end)
<------><------><------>continue;
 
<------><------>rc = -1;
<------><------>if (perf_event__prepare_comm(comm_event, _pid, machine,
<------><------><------><------><------>     &tgid, &ppid) != 0)
<------><------><------>break;
 
<------><------>if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
<------><------><------><------><------><------>ppid, process, machine) < 0)
<------><------><------>break;
 
<------><------>if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
<------><------><------><------><------><------>      tgid, process, machine) < 0)
<------><------><------>break;
 
<------><------>/*
<------><------> * Send the prepared comm event
<------><------> */
<------><------>if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
<------><------><------>break;
 
<------><------>rc = 0;
<------><------>if (_pid == pid) {
<------><------><------>/* process the parent's maps too */
<------><------><------>rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
<------><------><------><------><------><------>process, machine, mmap_data);
<------><------><------>if (rc)
<------><------><------><------>break;
<------><------>}
<------>}
 
<------>closedir(tasks);
<------>return rc;
}
 
int perf_event__synthesize_thread_map(struct perf_tool *tool,
<------><------><------><------>      struct perf_thread_map *threads,
<------><------><------><------>      perf_event__handler_t process,
<------><------><------><------>      struct machine *machine,
<------><------><------><------>      bool mmap_data)
{
<------>union perf_event *comm_event, *mmap_event, *fork_event;
<------>union perf_event *namespaces_event;
<------>int err = -1, thread, j;
 
<------>comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
<------>if (comm_event == NULL)
<------><------>goto out;
 
<------>mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
<------>if (mmap_event == NULL)
<------><------>goto out_free_comm;
 
<------>fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
<------>if (fork_event == NULL)
<------><------>goto out_free_mmap;
 
<------>namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
<------><------><------><------>  (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
<------><------><------><------>  machine->id_hdr_size);
<------>if (namespaces_event == NULL)
<------><------>goto out_free_fork;
 
<------>err = 0;
<------>for (thread = 0; thread < threads->nr; ++thread) {
<------><------>if (__event__synthesize_thread(comm_event, mmap_event,
<------><------><------><------><------>       fork_event, namespaces_event,
<------><------><------><------><------>       perf_thread_map__pid(threads, thread), 0,
<------><------><------><------><------>       process, tool, machine,
<------><------><------><------><------>       mmap_data)) {
<------><------><------>err = -1;
<------><------><------>break;
<------><------>}
 
<------><------>/*
<------><------> * comm.pid is set to thread group id by
<------><------> * perf_event__synthesize_comm
<------><------> */
<------><------>if ((int) comm_event->comm.pid != perf_thread_map__pid(threads, thread)) {
<------><------><------>bool need_leader = true;
 
<------><------><------>/* is thread group leader in thread_map? */
<------><------><------>for (j = 0; j < threads->nr; ++j) {
<------><------><------><------>if ((int) comm_event->comm.pid == perf_thread_map__pid(threads, j)) {
<------><------><------><------><------>need_leader = false;
<------><------><------><------><------>break;
<------><------><------><------>}
<------><------><------>}
 
<------><------><------>/* if not, generate events for it */
<------><------><------>if (need_leader &&
<------><------><------>    __event__synthesize_thread(comm_event, mmap_event,
<------><------><------><------><------><------>       fork_event, namespaces_event,
<------><------><------><------><------><------>       comm_event->comm.pid, 0,
<------><------><------><------><------><------>       process, tool, machine,
<------><------><------><------><------><------>       mmap_data)) {
<------><------><------><------>err = -1;
<------><------><------><------>break;
<------><------><------>}
<------><------>}
<------>}
<------>free(namespaces_event);
out_free_fork:
<------>free(fork_event);
out_free_mmap:
<------>free(mmap_event);
out_free_comm:
<------>free(comm_event);
out:
<------>return err;
}
 
static int __perf_event__synthesize_threads(struct perf_tool *tool,
<------><------><------><------><------>    perf_event__handler_t process,
<------><------><------><------><------>    struct machine *machine,
<------><------><------><------><------>    bool mmap_data,
<------><------><------><------><------>    struct dirent **dirent,
<------><------><------><------><------>    int start,
<------><------><------><------><------>    int num)
{
<------>union perf_event *comm_event, *mmap_event, *fork_event;
<------>union perf_event *namespaces_event;
<------>int err = -1;
<------>char *end;
<------>pid_t pid;
<------>int i;
 
<------>comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
<------>if (comm_event == NULL)
<------><------>goto out;
 
<------>mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
<------>if (mmap_event == NULL)
<------><------>goto out_free_comm;
 
<------>fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
<------>if (fork_event == NULL)
<------><------>goto out_free_mmap;
 
<------>namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
<------><------><------><------>  (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
<------><------><------><------>  machine->id_hdr_size);
<------>if (namespaces_event == NULL)
<------><------>goto out_free_fork;
 
<------>for (i = start; i < start + num; i++) {
<------><------>if (!isdigit(dirent[i]->d_name[0]))
<------><------><------>continue;
 
<------><------>pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
<------><------>/* only interested in proper numerical dirents */
<------><------>if (*end)
<------><------><------>continue;
<------><------>/*
<------><------> * We may race with exiting thread, so don't stop just because
<------><------> * one thread couldn't be synthesized.
<------><------> */
<------><------>__event__synthesize_thread(comm_event, mmap_event, fork_event,
<------><------><------><------><------>   namespaces_event, pid, 1, process,
<------><------><------><------><------>   tool, machine, mmap_data);
<------>}
<------>err = 0;
 
<------>free(namespaces_event);
out_free_fork:
<------>free(fork_event);
out_free_mmap:
<------>free(mmap_event);
out_free_comm:
<------>free(comm_event);
out:
<------>return err;
}
 
struct synthesize_threads_arg {
<------>struct perf_tool *tool;
<------>perf_event__handler_t process;
<------>struct machine *machine;
<------>bool mmap_data;
<------>struct dirent **dirent;
<------>int num;
<------>int start;
};
 
static void *synthesize_threads_worker(void *arg)
{
<------>struct synthesize_threads_arg *args = arg;
 
<------>__perf_event__synthesize_threads(args->tool, args->process,
<------><------><------><------><------> args->machine, args->mmap_data,
<------><------><------><------><------> args->dirent,
<------><------><------><------><------> args->start, args->num);
<------>return NULL;
}
 
int perf_event__synthesize_threads(struct perf_tool *tool,
<------><------><------><------>   perf_event__handler_t process,
<------><------><------><------>   struct machine *machine,
<------><------><------><------>   bool mmap_data,
<------><------><------><------>   unsigned int nr_threads_synthesize)
{
<------>struct synthesize_threads_arg *args = NULL;
<------>pthread_t *synthesize_threads = NULL;
<------>char proc_path[PATH_MAX];
<------>struct dirent **dirent;
<------>int num_per_thread;
<------>int m, n, i, j;
<------>int thread_nr;
<------>int base = 0;
<------>int err = -1;
 
 
<------>if (machine__is_default_guest(machine))
<------><------>return 0;
 
<------>snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
<------>n = scandir(proc_path, &dirent, 0, alphasort);
<------>if (n < 0)
<------><------>return err;
 
<------>if (nr_threads_synthesize == UINT_MAX)
<------><------>thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
<------>else
<------><------>thread_nr = nr_threads_synthesize;
 
<------>if (thread_nr <= 1) {
<------><------>err = __perf_event__synthesize_threads(tool, process,
<------><------><------><------><------><------>       machine, mmap_data,
<------><------><------><------><------><------>       dirent, base, n);
<------><------>goto free_dirent;
<------>}
<------>if (thread_nr > n)
<------><------>thread_nr = n;
 
<------>synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
<------>if (synthesize_threads == NULL)
<------><------>goto free_dirent;
 
<------>args = calloc(sizeof(*args), thread_nr);
<------>if (args == NULL)
<------><------>goto free_threads;
 
<------>num_per_thread = n / thread_nr;
<------>m = n % thread_nr;
<------>for (i = 0; i < thread_nr; i++) {
<------><------>args[i].tool = tool;
<------><------>args[i].process = process;
<------><------>args[i].machine = machine;
<------><------>args[i].mmap_data = mmap_data;
<------><------>args[i].dirent = dirent;
<------>}
<------>for (i = 0; i < m; i++) {
<------><------>args[i].num = num_per_thread + 1;
<------><------>args[i].start = i * args[i].num;
<------>}
<------>if (i != 0)
<------><------>base = args[i-1].start + args[i-1].num;
<------>for (j = i; j < thread_nr; j++) {
<------><------>args[j].num = num_per_thread;
<------><------>args[j].start = base + (j - i) * args[i].num;
<------>}
 
<------>for (i = 0; i < thread_nr; i++) {
<------><------>if (pthread_create(&synthesize_threads[i], NULL,
<------><------><------><------>   synthesize_threads_worker, &args[i]))
<------><------><------>goto out_join;
<------>}
<------>err = 0;
out_join:
<------>for (i = 0; i < thread_nr; i++)
<------><------>pthread_join(synthesize_threads[i], NULL);
<------>free(args);
free_threads:
<------>free(synthesize_threads);
free_dirent:
<------>for (i = 0; i < n; i++)
<------><------>zfree(&dirent[i]);
<------>free(dirent);
 
<------>return err;
}
 
int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused,
<------><------><------><------><------>      perf_event__handler_t process __maybe_unused,
<------><------><------><------><------>      struct machine *machine __maybe_unused)
{
<------>return 0;
}
 
static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
<------><------><------><------><------><------>perf_event__handler_t process,
<------><------><------><------><------><------>struct machine *machine)
{
<------>size_t size;
<------>struct map *map = machine__kernel_map(machine);
<------>struct kmap *kmap;
<------>int err;
<------>union perf_event *event;
 
<------>if (map == NULL)
<------><------>return -1;
 
<------>kmap = map__kmap(map);
<------>if (!kmap->ref_reloc_sym)
<------><------>return -1;
 
<------>/*
<------> * We should get this from /sys/kernel/sections/.text, but till that is
<------> * available use this, and after it is use this as a fallback for older
<------> * kernels.
<------> */
<------>event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
<------>if (event == NULL) {
<------><------>pr_debug("Not enough memory synthesizing mmap event "
<------><------><------> "for kernel modules\n");
<------><------>return -1;
<------>}
 
<------>if (machine__is_host(machine)) {
<------><------>/*
<------><------> * kernel uses PERF_RECORD_MISC_USER for user space maps,
<------><------> * see kernel/perf_event.c __perf_event_mmap
<------><------> */
<------><------>event->header.misc = PERF_RECORD_MISC_KERNEL;
<------>} else {
<------><------>event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
<------>}
 
<------>size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
<------><------><------>"%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
<------>size = PERF_ALIGN(size, sizeof(u64));
<------>event->mmap.header.type = PERF_RECORD_MMAP;
<------>event->mmap.header.size = (sizeof(event->mmap) -
<------><------><------>(sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
<------>event->mmap.pgoff = kmap->ref_reloc_sym->addr;
<------>event->mmap.start = map->start;
<------>event->mmap.len   = map->end - event->mmap.start;
<------>event->mmap.pid   = machine->pid;
 
<------>err = perf_tool__process_synth_event(tool, event, machine, process);
<------>free(event);
 
<------>return err;
}
 
int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
<------><------><------><------>       perf_event__handler_t process,
<------><------><------><------>       struct machine *machine)
{
<------>int err;
 
<------>err = __perf_event__synthesize_kernel_mmap(tool, process, machine);
<------>if (err < 0)
<------><------>return err;
 
<------>return perf_event__synthesize_extra_kmaps(tool, process, machine);
}
 
int perf_event__synthesize_thread_map2(struct perf_tool *tool,
<------><------><------><------>      struct perf_thread_map *threads,
<------><------><------><------>      perf_event__handler_t process,
<------><------><------><------>      struct machine *machine)
{
<------>union perf_event *event;
<------>int i, err, size;
 
<------>size  = sizeof(event->thread_map);
<------>size +=	threads->nr * sizeof(event->thread_map.entries[0]);
 
<------>event = zalloc(size);
<------>if (!event)
<------><------>return -ENOMEM;
 
<------>event->header.type = PERF_RECORD_THREAD_MAP;
<------>event->header.size = size;
<------>event->thread_map.nr = threads->nr;
 
<------>for (i = 0; i < threads->nr; i++) {
<------><------>struct perf_record_thread_map_entry *entry = &event->thread_map.entries[i];
<------><------>char *comm = perf_thread_map__comm(threads, i);
 
<------><------>if (!comm)
<------><------><------>comm = (char *) "";
 
<------><------>entry->pid = perf_thread_map__pid(threads, i);
<------><------>strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
<------>}
 
<------>err = process(tool, event, NULL, machine);
 
<------>free(event);
<------>return err;
}
 
static void synthesize_cpus(struct cpu_map_entries *cpus,
<------><------><------>    struct perf_cpu_map *map)
{
<------>int i;
 
<------>cpus->nr = map->nr;
 
<------>for (i = 0; i < map->nr; i++)
<------><------>cpus->cpu[i] = map->map[i];
}
 
static void synthesize_mask(struct perf_record_record_cpu_map *mask,
<------><------><------>    struct perf_cpu_map *map, int max)
{
<------>int i;
 
<------>mask->nr = BITS_TO_LONGS(max);
<------>mask->long_size = sizeof(long);
 
<------>for (i = 0; i < map->nr; i++)
<------><------>set_bit(map->map[i], mask->mask);
}
 
static size_t cpus_size(struct perf_cpu_map *map)
{
<------>return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
}
 
static size_t mask_size(struct perf_cpu_map *map, int *max)
{
<------>int i;
 
<------>*max = 0;
 
<------>for (i = 0; i < map->nr; i++) {
<------><------>/* bit possition of the cpu is + 1 */
<------><------>int bit = map->map[i] + 1;
 
<------><------>if (bit > *max)
<------><------><------>*max = bit;
<------>}
 
<------>return sizeof(struct perf_record_record_cpu_map) + BITS_TO_LONGS(*max) * sizeof(long);
}
 
void *cpu_map_data__alloc(struct perf_cpu_map *map, size_t *size, u16 *type, int *max)
{
<------>size_t size_cpus, size_mask;
<------>bool is_dummy = perf_cpu_map__empty(map);
 
<------>/*
<------> * Both array and mask data have variable size based
<------> * on the number of cpus and their actual values.
<------> * The size of the 'struct perf_record_cpu_map_data' is:
<------> *
<------> *   array = size of 'struct cpu_map_entries' +
<------> *           number of cpus * sizeof(u64)
<------> *
<------> *   mask  = size of 'struct perf_record_record_cpu_map' +
<------> *           maximum cpu bit converted to size of longs
<------> *
<------> * and finaly + the size of 'struct perf_record_cpu_map_data'.
<------> */
<------>size_cpus = cpus_size(map);
<------>size_mask = mask_size(map, max);
 
<------>if (is_dummy || (size_cpus < size_mask)) {
<------><------>*size += size_cpus;
<------><------>*type  = PERF_CPU_MAP__CPUS;
<------>} else {
<------><------>*size += size_mask;
<------><------>*type  = PERF_CPU_MAP__MASK;
<------>}
 
<------>*size += sizeof(struct perf_record_cpu_map_data);
<------>*size = PERF_ALIGN(*size, sizeof(u64));
<------>return zalloc(*size);
}
 
void cpu_map_data__synthesize(struct perf_record_cpu_map_data *data, struct perf_cpu_map *map,
<------><------><------>      u16 type, int max)
{
<------>data->type = type;
 
<------>switch (type) {
<------>case PERF_CPU_MAP__CPUS:
<------><------>synthesize_cpus((struct cpu_map_entries *) data->data, map);
<------><------>break;
<------>case PERF_CPU_MAP__MASK:
<------><------>synthesize_mask((struct perf_record_record_cpu_map *)data->data, map, max);
<------>default:
<------><------>break;
<------>}
}
 
static struct perf_record_cpu_map *cpu_map_event__new(struct perf_cpu_map *map)
{
<------>size_t size = sizeof(struct perf_record_cpu_map);
<------>struct perf_record_cpu_map *event;
<------>int max;
<------>u16 type;
 
<------>event = cpu_map_data__alloc(map, &size, &type, &max);
<------>if (!event)
<------><------>return NULL;
 
<------>event->header.type = PERF_RECORD_CPU_MAP;
<------>event->header.size = size;
<------>event->data.type   = type;
 
<------>cpu_map_data__synthesize(&event->data, map, type, max);
<------>return event;
}
 
int perf_event__synthesize_cpu_map(struct perf_tool *tool,
<------><------><------><------>   struct perf_cpu_map *map,
<------><------><------><------>   perf_event__handler_t process,
<------><------><------><------>   struct machine *machine)
{
<------>struct perf_record_cpu_map *event;
<------>int err;
 
<------>event = cpu_map_event__new(map);
<------>if (!event)
<------><------>return -ENOMEM;
 
<------>err = process(tool, (union perf_event *) event, NULL, machine);
 
<------>free(event);
<------>return err;
}
 
int perf_event__synthesize_stat_config(struct perf_tool *tool,
<------><------><------><------>       struct perf_stat_config *config,
<------><------><------><------>       perf_event__handler_t process,
<------><------><------><------>       struct machine *machine)
{
<------>struct perf_record_stat_config *event;
<------>int size, i = 0, err;
 
<------>size  = sizeof(*event);
<------>size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
 
<------>event = zalloc(size);
<------>if (!event)
<------><------>return -ENOMEM;
 
<------>event->header.type = PERF_RECORD_STAT_CONFIG;
<------>event->header.size = size;
<------>event->nr          = PERF_STAT_CONFIG_TERM__MAX;
 
#define ADD(__term, __val)					\
<------>event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term;	\
<------>event->data[i].val = __val;				\
<------>i++;
 
<------>ADD(AGGR_MODE,	config->aggr_mode)
<------>ADD(INTERVAL,	config->interval)
<------>ADD(SCALE,	config->scale)
 
<------>WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
<------><------>  "stat config terms unbalanced\n");
#undef ADD
 
<------>err = process(tool, (union perf_event *) event, NULL, machine);
 
<------>free(event);
<------>return err;
}
 
int perf_event__synthesize_stat(struct perf_tool *tool,
<------><------><------><------>u32 cpu, u32 thread, u64 id,
<------><------><------><------>struct perf_counts_values *count,
<------><------><------><------>perf_event__handler_t process,
<------><------><------><------>struct machine *machine)
{
<------>struct perf_record_stat event;
 
<------>event.header.type = PERF_RECORD_STAT;
<------>event.header.size = sizeof(event);
<------>event.header.misc = 0;
 
<------>event.id        = id;
<------>event.cpu       = cpu;
<------>event.thread    = thread;
<------>event.val       = count->val;
<------>event.ena       = count->ena;
<------>event.run       = count->run;
 
<------>return process(tool, (union perf_event *) &event, NULL, machine);
}
 
int perf_event__synthesize_stat_round(struct perf_tool *tool,
<------><------><------><------>      u64 evtime, u64 type,
<------><------><------><------>      perf_event__handler_t process,
<------><------><------><------>      struct machine *machine)
{
<------>struct perf_record_stat_round event;
 
<------>event.header.type = PERF_RECORD_STAT_ROUND;
<------>event.header.size = sizeof(event);
<------>event.header.misc = 0;
 
<------>event.time = evtime;
<------>event.type = type;
 
<------>return process(tool, (union perf_event *) &event, NULL, machine);
}
 
size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type, u64 read_format)
{
<------>size_t sz, result = sizeof(struct perf_record_sample);
 
<------>if (type & PERF_SAMPLE_IDENTIFIER)
<------><------>result += sizeof(u64);
 
<------>if (type & PERF_SAMPLE_IP)
<------><------>result += sizeof(u64);
 
<------>if (type & PERF_SAMPLE_TID)
<------><------>result += sizeof(u64);
 
<------>if (type & PERF_SAMPLE_TIME)
<------><------>result += sizeof(u64);
 
<------>if (type & PERF_SAMPLE_ADDR)
<------><------>result += sizeof(u64);
 
<------>if (type & PERF_SAMPLE_ID)
<------><------>result += sizeof(u64);
 
<------>if (type & PERF_SAMPLE_STREAM_ID)
<------><------>result += sizeof(u64);
 
<------>if (type & PERF_SAMPLE_CPU)
<------><------>result += sizeof(u64);
 
<------>if (type & PERF_SAMPLE_PERIOD)
<------><------>result += sizeof(u64);
 
<------>if (type & PERF_SAMPLE_READ) {
<------><------>result += sizeof(u64);
<------><------>if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
<------><------><------>result += sizeof(u64);
<------><------>if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
<------><------><------>result += sizeof(u64);
<------><------>/* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
<------><------>if (read_format & PERF_FORMAT_GROUP) {
<------><------><------>sz = sample->read.group.nr *
<------><------><------>     sizeof(struct sample_read_value);
<------><------><------>result += sz;
<------><------>} else {
<------><------><------>result += sizeof(u64);
<------><------>}
<------>}
 
<------>if (type & PERF_SAMPLE_CALLCHAIN) {
<------><------>sz = (sample->callchain->nr + 1) * sizeof(u64);
<------><------>result += sz;
<------>}
 
<------>if (type & PERF_SAMPLE_RAW) {
<------><------>result += sizeof(u32);
<------><------>result += sample->raw_size;
<------>}
 
<------>if (type & PERF_SAMPLE_BRANCH_STACK) {
<------><------>sz = sample->branch_stack->nr * sizeof(struct branch_entry);
<------><------>/* nr, hw_idx */
<------><------>sz += 2 * sizeof(u64);
<------><------>result += sz;
<------>}
 
<------>if (type & PERF_SAMPLE_REGS_USER) {
<------><------>if (sample->user_regs.abi) {
<------><------><------>result += sizeof(u64);
<------><------><------>sz = hweight64(sample->user_regs.mask) * sizeof(u64);
<------><------><------>result += sz;
<------><------>} else {
<------><------><------>result += sizeof(u64);
<------><------>}
<------>}
 
<------>if (type & PERF_SAMPLE_STACK_USER) {
<------><------>sz = sample->user_stack.size;
<------><------>result += sizeof(u64);
<------><------>if (sz) {
<------><------><------>result += sz;
<------><------><------>result += sizeof(u64);
<------><------>}
<------>}
 
<------>if (type & PERF_SAMPLE_WEIGHT)
<------><------>result += sizeof(u64);
 
<------>if (type & PERF_SAMPLE_DATA_SRC)
<------><------>result += sizeof(u64);
 
<------>if (type & PERF_SAMPLE_TRANSACTION)
<------><------>result += sizeof(u64);
 
<------>if (type & PERF_SAMPLE_REGS_INTR) {
<------><------>if (sample->intr_regs.abi) {
<------><------><------>result += sizeof(u64);
<------><------><------>sz = hweight64(sample->intr_regs.mask) * sizeof(u64);
<------><------><------>result += sz;
<------><------>} else {
<------><------><------>result += sizeof(u64);
<------><------>}
<------>}
 
<------>if (type & PERF_SAMPLE_PHYS_ADDR)
<------><------>result += sizeof(u64);
 
<------>if (type & PERF_SAMPLE_CGROUP)
<------><------>result += sizeof(u64);
 
<------>if (type & PERF_SAMPLE_AUX) {
<------><------>result += sizeof(u64);
<------><------>result += sample->aux_sample.size;
<------>}
 
<------>return result;
}
 
int perf_event__synthesize_sample(union perf_event *event, u64 type, u64 read_format,
<------><------><------><------>  const struct perf_sample *sample)
{
<------>__u64 *array;
<------>size_t sz;
<------>/*
<------> * used for cross-endian analysis. See git commit 65014ab3
<------> * for why this goofiness is needed.
<------> */
<------>union u64_swap u;
 
<------>array = event->sample.array;
 
<------>if (type & PERF_SAMPLE_IDENTIFIER) {
<------><------>*array = sample->id;
<------><------>array++;
<------>}
 
<------>if (type & PERF_SAMPLE_IP) {
<------><------>*array = sample->ip;
<------><------>array++;
<------>}
 
<------>if (type & PERF_SAMPLE_TID) {
<------><------>u.val32[0] = sample->pid;
<------><------>u.val32[1] = sample->tid;
<------><------>*array = u.val64;
<------><------>array++;
<------>}
 
<------>if (type & PERF_SAMPLE_TIME) {
<------><------>*array = sample->time;
<------><------>array++;
<------>}
 
<------>if (type & PERF_SAMPLE_ADDR) {
<------><------>*array = sample->addr;
<------><------>array++;
<------>}
 
<------>if (type & PERF_SAMPLE_ID) {
<------><------>*array = sample->id;
<------><------>array++;
<------>}
 
<------>if (type & PERF_SAMPLE_STREAM_ID) {
<------><------>*array = sample->stream_id;
<------><------>array++;
<------>}
 
<------>if (type & PERF_SAMPLE_CPU) {
<------><------>u.val32[0] = sample->cpu;
<------><------>u.val32[1] = 0;
<------><------>*array = u.val64;
<------><------>array++;
<------>}
 
<------>if (type & PERF_SAMPLE_PERIOD) {
<------><------>*array = sample->period;
<------><------>array++;
<------>}
 
<------>if (type & PERF_SAMPLE_READ) {
<------><------>if (read_format & PERF_FORMAT_GROUP)
<------><------><------>*array = sample->read.group.nr;
<------><------>else
<------><------><------>*array = sample->read.one.value;
<------><------>array++;
 
<------><------>if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
<------><------><------>*array = sample->read.time_enabled;
<------><------><------>array++;
<------><------>}
 
<------><------>if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
<------><------><------>*array = sample->read.time_running;
<------><------><------>array++;
<------><------>}
 
<------><------>/* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
<------><------>if (read_format & PERF_FORMAT_GROUP) {
<------><------><------>sz = sample->read.group.nr *
<------><------><------>     sizeof(struct sample_read_value);
<------><------><------>memcpy(array, sample->read.group.values, sz);
<------><------><------>array = (void *)array + sz;
<------><------>} else {
<------><------><------>*array = sample->read.one.id;
<------><------><------>array++;
<------><------>}
<------>}
 
<------>if (type & PERF_SAMPLE_CALLCHAIN) {
<------><------>sz = (sample->callchain->nr + 1) * sizeof(u64);
<------><------>memcpy(array, sample->callchain, sz);
<------><------>array = (void *)array + sz;
<------>}
 
<------>if (type & PERF_SAMPLE_RAW) {
<------><------>u.val32[0] = sample->raw_size;
<------><------>*array = u.val64;
<------><------>array = (void *)array + sizeof(u32);
 
<------><------>memcpy(array, sample->raw_data, sample->raw_size);
<------><------>array = (void *)array + sample->raw_size;
<------>}
 
<------>if (type & PERF_SAMPLE_BRANCH_STACK) {
<------><------>sz = sample->branch_stack->nr * sizeof(struct branch_entry);
<------><------>/* nr, hw_idx */
<------><------>sz += 2 * sizeof(u64);
<------><------>memcpy(array, sample->branch_stack, sz);
<------><------>array = (void *)array + sz;
<------>}
 
<------>if (type & PERF_SAMPLE_REGS_USER) {
<------><------>if (sample->user_regs.abi) {
<------><------><------>*array++ = sample->user_regs.abi;
<------><------><------>sz = hweight64(sample->user_regs.mask) * sizeof(u64);
<------><------><------>memcpy(array, sample->user_regs.regs, sz);
<------><------><------>array = (void *)array + sz;
<------><------>} else {
<------><------><------>*array++ = 0;
<------><------>}
<------>}
 
<------>if (type & PERF_SAMPLE_STACK_USER) {
<------><------>sz = sample->user_stack.size;
<------><------>*array++ = sz;
<------><------>if (sz) {
<------><------><------>memcpy(array, sample->user_stack.data, sz);
<------><------><------>array = (void *)array + sz;
<------><------><------>*array++ = sz;
<------><------>}
<------>}
 
<------>if (type & PERF_SAMPLE_WEIGHT) {
<------><------>*array = sample->weight;
<------><------>array++;
<------>}
 
<------>if (type & PERF_SAMPLE_DATA_SRC) {
<------><------>*array = sample->data_src;
<------><------>array++;
<------>}
 
<------>if (type & PERF_SAMPLE_TRANSACTION) {
<------><------>*array = sample->transaction;
<------><------>array++;
<------>}
 
<------>if (type & PERF_SAMPLE_REGS_INTR) {
<------><------>if (sample->intr_regs.abi) {
<------><------><------>*array++ = sample->intr_regs.abi;
<------><------><------>sz = hweight64(sample->intr_regs.mask) * sizeof(u64);
<------><------><------>memcpy(array, sample->intr_regs.regs, sz);
<------><------><------>array = (void *)array + sz;
<------><------>} else {
<------><------><------>*array++ = 0;
<------><------>}
<------>}
 
<------>if (type & PERF_SAMPLE_PHYS_ADDR) {
<------><------>*array = sample->phys_addr;
<------><------>array++;
<------>}
 
<------>if (type & PERF_SAMPLE_CGROUP) {
<------><------>*array = sample->cgroup;
<------><------>array++;
<------>}
 
<------>if (type & PERF_SAMPLE_AUX) {
<------><------>sz = sample->aux_sample.size;
<------><------>*array++ = sz;
<------><------>memcpy(array, sample->aux_sample.data, sz);
<------><------>array = (void *)array + sz;
<------>}
 
<------>return 0;
}
 
int perf_event__synthesize_id_index(struct perf_tool *tool, perf_event__handler_t process,
<------><------><------><------>    struct evlist *evlist, struct machine *machine)
{
<------>union perf_event *ev;
<------>struct evsel *evsel;
<------>size_t nr = 0, i = 0, sz, max_nr, n;
<------>int err;
 
<------>pr_debug2("Synthesizing id index\n");
 
<------>max_nr = (UINT16_MAX - sizeof(struct perf_record_id_index)) /
<------><------> sizeof(struct id_index_entry);
 
<------>evlist__for_each_entry(evlist, evsel)
<------><------>nr += evsel->core.ids;
 
<------>n = nr > max_nr ? max_nr : nr;
<------>sz = sizeof(struct perf_record_id_index) + n * sizeof(struct id_index_entry);
<------>ev = zalloc(sz);
<------>if (!ev)
<------><------>return -ENOMEM;
 
<------>ev->id_index.header.type = PERF_RECORD_ID_INDEX;
<------>ev->id_index.header.size = sz;
<------>ev->id_index.nr = n;
 
<------>evlist__for_each_entry(evlist, evsel) {
<------><------>u32 j;
 
<------><------>for (j = 0; j < evsel->core.ids; j++) {
<------><------><------>struct id_index_entry *e;
<------><------><------>struct perf_sample_id *sid;
 
<------><------><------>if (i >= n) {
<------><------><------><------>err = process(tool, ev, NULL, machine);
<------><------><------><------>if (err)
<------><------><------><------><------>goto out_err;
<------><------><------><------>nr -= n;
<------><------><------><------>i = 0;
<------><------><------>}
 
<------><------><------>e = &ev->id_index.entries[i++];
 
<------><------><------>e->id = evsel->core.id[j];
 
<------><------><------>sid = perf_evlist__id2sid(evlist, e->id);
<------><------><------>if (!sid) {
<------><------><------><------>free(ev);
<------><------><------><------>return -ENOENT;
<------><------><------>}
 
<------><------><------>e->idx = sid->idx;
<------><------><------>e->cpu = sid->cpu;
<------><------><------>e->tid = sid->tid;
<------><------>}
<------>}
 
<------>sz = sizeof(struct perf_record_id_index) + nr * sizeof(struct id_index_entry);
<------>ev->id_index.header.size = sz;
<------>ev->id_index.nr = nr;
 
<------>err = process(tool, ev, NULL, machine);
out_err:
<------>free(ev);
 
<------>return err;
}
 
int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
<------><------><------><------>  struct target *target, struct perf_thread_map *threads,
<------><------><------><------>  perf_event__handler_t process, bool data_mmap,
<------><------><------><------>  unsigned int nr_threads_synthesize)
{
<------>if (target__has_task(target))
<------><------>return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap);
<------>else if (target__has_cpu(target))
<------><------>return perf_event__synthesize_threads(tool, process,
<------><------><------><------><------><------>      machine, data_mmap,
<------><------><------><------><------><------>      nr_threads_synthesize);
<------>/* command specified */
<------>return 0;
}
 
int machine__synthesize_threads(struct machine *machine, struct target *target,
<------><------><------><------>struct perf_thread_map *threads, bool data_mmap,
<------><------><------><------>unsigned int nr_threads_synthesize)
{
<------>return __machine__synthesize_threads(machine, NULL, target, threads,
<------><------><------><------><------>     perf_event__process, data_mmap,
<------><------><------><------><------>     nr_threads_synthesize);
}
 
static struct perf_record_event_update *event_update_event__new(size_t size, u64 type, u64 id)
{
<------>struct perf_record_event_update *ev;
 
<------>size += sizeof(*ev);
<------>size  = PERF_ALIGN(size, sizeof(u64));
 
<------>ev = zalloc(size);
<------>if (ev) {
<------><------>ev->header.type = PERF_RECORD_EVENT_UPDATE;
<------><------>ev->header.size = (u16)size;
<------><------>ev->type	= type;
<------><------>ev->id		= id;
<------>}
<------>return ev;
}
 
int perf_event__synthesize_event_update_unit(struct perf_tool *tool, struct evsel *evsel,
<------><------><------><------><------>     perf_event__handler_t process)
{
<------>size_t size = strlen(evsel->unit);
<------>struct perf_record_event_update *ev;
<------>int err;
 
<------>ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->core.id[0]);
<------>if (ev == NULL)
<------><------>return -ENOMEM;
 
<------>strlcpy(ev->data, evsel->unit, size + 1);
<------>err = process(tool, (union perf_event *)ev, NULL, NULL);
<------>free(ev);
<------>return err;
}
 
int perf_event__synthesize_event_update_scale(struct perf_tool *tool, struct evsel *evsel,
<------><------><------><------><------>      perf_event__handler_t process)
{
<------>struct perf_record_event_update *ev;
<------>struct perf_record_event_update_scale *ev_data;
<------>int err;
 
<------>ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->core.id[0]);
<------>if (ev == NULL)
<------><------>return -ENOMEM;
 
<------>ev_data = (struct perf_record_event_update_scale *)ev->data;
<------>ev_data->scale = evsel->scale;
<------>err = process(tool, (union perf_event *)ev, NULL, NULL);
<------>free(ev);
<------>return err;
}
 
int perf_event__synthesize_event_update_name(struct perf_tool *tool, struct evsel *evsel,
<------><------><------><------><------>     perf_event__handler_t process)
{
<------>struct perf_record_event_update *ev;
<------>size_t len = strlen(evsel->name);
<------>int err;
 
<------>ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->core.id[0]);
<------>if (ev == NULL)
<------><------>return -ENOMEM;
 
<------>strlcpy(ev->data, evsel->name, len + 1);
<------>err = process(tool, (union perf_event *)ev, NULL, NULL);
<------>free(ev);
<------>return err;
}
 
int perf_event__synthesize_event_update_cpus(struct perf_tool *tool, struct evsel *evsel,
<------><------><------><------><------>     perf_event__handler_t process)
{
<------>size_t size = sizeof(struct perf_record_event_update);
<------>struct perf_record_event_update *ev;
<------>int max, err;
<------>u16 type;
 
<------>if (!evsel->core.own_cpus)
<------><------>return 0;
 
<------>ev = cpu_map_data__alloc(evsel->core.own_cpus, &size, &type, &max);
<------>if (!ev)
<------><------>return -ENOMEM;
 
<------>ev->header.type = PERF_RECORD_EVENT_UPDATE;
<------>ev->header.size = (u16)size;
<------>ev->type	= PERF_EVENT_UPDATE__CPUS;
<------>ev->id		= evsel->core.id[0];
 
<------>cpu_map_data__synthesize((struct perf_record_cpu_map_data *)ev->data,
<------><------><------><------> evsel->core.own_cpus, type, max);
 
<------>err = process(tool, (union perf_event *)ev, NULL, NULL);
<------>free(ev);
<------>return err;
}
 
int perf_event__synthesize_attrs(struct perf_tool *tool, struct evlist *evlist,
<------><------><------><------> perf_event__handler_t process)
{
<------>struct evsel *evsel;
<------>int err = 0;
 
<------>evlist__for_each_entry(evlist, evsel) {
<------><------>err = perf_event__synthesize_attr(tool, &evsel->core.attr, evsel->core.ids,
<------><------><------><------><------><------>  evsel->core.id, process);
<------><------>if (err) {
<------><------><------>pr_debug("failed to create perf header attribute\n");
<------><------><------>return err;
<------><------>}
<------>}
 
<------>return err;
}
 
static bool has_unit(struct evsel *evsel)
{
<------>return evsel->unit && *evsel->unit;
}
 
static bool has_scale(struct evsel *evsel)
{
<------>return evsel->scale != 1;
}
 
int perf_event__synthesize_extra_attr(struct perf_tool *tool, struct evlist *evsel_list,
<------><------><------><------>      perf_event__handler_t process, bool is_pipe)
{
<------>struct evsel *evsel;
<------>int err;
 
<------>/*
<------> * Synthesize other events stuff not carried within
<------> * attr event - unit, scale, name
<------> */
<------>evlist__for_each_entry(evsel_list, evsel) {
<------><------>if (!evsel->supported)
<------><------><------>continue;
 
<------><------>/*
<------><------> * Synthesize unit and scale only if it's defined.
<------><------> */
<------><------>if (has_unit(evsel)) {
<------><------><------>err = perf_event__synthesize_event_update_unit(tool, evsel, process);
<------><------><------>if (err < 0) {
<------><------><------><------>pr_err("Couldn't synthesize evsel unit.\n");
<------><------><------><------>return err;
<------><------><------>}
<------><------>}
 
<------><------>if (has_scale(evsel)) {
<------><------><------>err = perf_event__synthesize_event_update_scale(tool, evsel, process);
<------><------><------>if (err < 0) {
<------><------><------><------>pr_err("Couldn't synthesize evsel evsel.\n");
<------><------><------><------>return err;
<------><------><------>}
<------><------>}
 
<------><------>if (evsel->core.own_cpus) {
<------><------><------>err = perf_event__synthesize_event_update_cpus(tool, evsel, process);
<------><------><------>if (err < 0) {
<------><------><------><------>pr_err("Couldn't synthesize evsel cpus.\n");
<------><------><------><------>return err;
<------><------><------>}
<------><------>}
 
<------><------>/*
<------><------> * Name is needed only for pipe output,
<------><------> * perf.data carries event names.
<------><------> */
<------><------>if (is_pipe) {
<------><------><------>err = perf_event__synthesize_event_update_name(tool, evsel, process);
<------><------><------>if (err < 0) {
<------><------><------><------>pr_err("Couldn't synthesize evsel name.\n");
<------><------><------><------>return err;
<------><------><------>}
<------><------>}
<------>}
<------>return 0;
}
 
int perf_event__synthesize_attr(struct perf_tool *tool, struct perf_event_attr *attr,
<------><------><------><------>u32 ids, u64 *id, perf_event__handler_t process)
{
<------>union perf_event *ev;
<------>size_t size;
<------>int err;
 
<------>size = sizeof(struct perf_event_attr);
<------>size = PERF_ALIGN(size, sizeof(u64));
<------>size += sizeof(struct perf_event_header);
<------>size += ids * sizeof(u64);
 
<------>ev = zalloc(size);
 
<------>if (ev == NULL)
<------><------>return -ENOMEM;
 
<------>ev->attr.attr = *attr;
<------>memcpy(ev->attr.id, id, ids * sizeof(u64));
 
<------>ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
<------>ev->attr.header.size = (u16)size;
 
<------>if (ev->attr.header.size == size)
<------><------>err = process(tool, ev, NULL, NULL);
<------>else
<------><------>err = -E2BIG;
 
<------>free(ev);
 
<------>return err;
}
 
int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, struct evlist *evlist,
<------><------><------><------><------>perf_event__handler_t process)
{
<------>union perf_event ev;
<------>struct tracing_data *tdata;
<------>ssize_t size = 0, aligned_size = 0, padding;
<------>struct feat_fd ff;
 
<------>/*
<------> * We are going to store the size of the data followed
<------> * by the data contents. Since the fd descriptor is a pipe,
<------> * we cannot seek back to store the size of the data once
<------> * we know it. Instead we:
<------> *
<------> * - write the tracing data to the temp file
<------> * - get/write the data size to pipe
<------> * - write the tracing data from the temp file
<------> *   to the pipe
<------> */
<------>tdata = tracing_data_get(&evlist->core.entries, fd, true);
<------>if (!tdata)
<------><------>return -1;
 
<------>memset(&ev, 0, sizeof(ev));
 
<------>ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
<------>size = tdata->size;
<------>aligned_size = PERF_ALIGN(size, sizeof(u64));
<------>padding = aligned_size - size;
<------>ev.tracing_data.header.size = sizeof(ev.tracing_data);
<------>ev.tracing_data.size = aligned_size;
 
<------>process(tool, &ev, NULL, NULL);
 
<------>/*
<------> * The put function will copy all the tracing data
<------> * stored in temp file to the pipe.
<------> */
<------>tracing_data_put(tdata);
 
<------>ff = (struct feat_fd){ .fd = fd };
<------>if (write_padded(&ff, NULL, 0, padding))
<------><------>return -1;
 
<------>return aligned_size;
}
 
int perf_event__synthesize_build_id(struct perf_tool *tool, struct dso *pos, u16 misc,
<------><------><------><------>    perf_event__handler_t process, struct machine *machine)
{
<------>union perf_event ev;
<------>size_t len;
 
<------>if (!pos->hit)
<------><------>return 0;
 
<------>memset(&ev, 0, sizeof(ev));
 
<------>len = pos->long_name_len + 1;
<------>len = PERF_ALIGN(len, NAME_ALIGN);
<------>memcpy(&ev.build_id.build_id, pos->bid.data, sizeof(pos->bid.data));
<------>ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
<------>ev.build_id.header.misc = misc;
<------>ev.build_id.pid = machine->pid;
<------>ev.build_id.header.size = sizeof(ev.build_id) + len;
<------>memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
 
<------>return process(tool, &ev, NULL, machine);
}
 
int perf_event__synthesize_stat_events(struct perf_stat_config *config, struct perf_tool *tool,
<------><------><------><------>       struct evlist *evlist, perf_event__handler_t process, bool attrs)
{
<------>int err;
 
<------>if (attrs) {
<------><------>err = perf_event__synthesize_attrs(tool, evlist, process);
<------><------>if (err < 0) {
<------><------><------>pr_err("Couldn't synthesize attrs.\n");
<------><------><------>return err;
<------><------>}
<------>}
 
<------>err = perf_event__synthesize_extra_attr(tool, evlist, process, attrs);
<------>err = perf_event__synthesize_thread_map2(tool, evlist->core.threads, process, NULL);
<------>if (err < 0) {
<------><------>pr_err("Couldn't synthesize thread map.\n");
<------><------>return err;
<------>}
 
<------>err = perf_event__synthesize_cpu_map(tool, evlist->core.cpus, process, NULL);
<------>if (err < 0) {
<------><------>pr_err("Couldn't synthesize thread map.\n");
<------><------>return err;
<------>}
 
<------>err = perf_event__synthesize_stat_config(tool, config, process, NULL);
<------>if (err < 0) {
<------><------>pr_err("Couldn't synthesize config.\n");
<------><------>return err;
<------>}
 
<------>return 0;
}
 
extern const struct perf_header_feature_ops feat_ops[HEADER_LAST_FEATURE];
 
int perf_event__synthesize_features(struct perf_tool *tool, struct perf_session *session,
<------><------><------><------>    struct evlist *evlist, perf_event__handler_t process)
{
<------>struct perf_header *header = &session->header;
<------>struct perf_record_header_feature *fe;
<------>struct feat_fd ff;
<------>size_t sz, sz_hdr;
<------>int feat, ret;
 
<------>sz_hdr = sizeof(fe->header);
<------>sz = sizeof(union perf_event);
<------>/* get a nice alignment */
<------>sz = PERF_ALIGN(sz, page_size);
 
<------>memset(&ff, 0, sizeof(ff));
 
<------>ff.buf = malloc(sz);
<------>if (!ff.buf)
<------><------>return -ENOMEM;
 
<------>ff.size = sz - sz_hdr;
<------>ff.ph = &session->header;
 
<------>for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
<------><------>if (!feat_ops[feat].synthesize) {
<------><------><------>pr_debug("No record header feature for header :%d\n", feat);
<------><------><------>continue;
<------><------>}
 
<------><------>ff.offset = sizeof(*fe);
 
<------><------>ret = feat_ops[feat].write(&ff, evlist);
<------><------>if (ret || ff.offset <= (ssize_t)sizeof(*fe)) {
<------><------><------>pr_debug("Error writing feature\n");
<------><------><------>continue;
<------><------>}
<------><------>/* ff.buf may have changed due to realloc in do_write() */
<------><------>fe = ff.buf;
<------><------>memset(fe, 0, sizeof(*fe));
 
<------><------>fe->feat_id = feat;
<------><------>fe->header.type = PERF_RECORD_HEADER_FEATURE;
<------><------>fe->header.size = ff.offset;
 
<------><------>ret = process(tool, ff.buf, NULL, NULL);
<------><------>if (ret) {
<------><------><------>free(ff.buf);
<------><------><------>return ret;
<------><------>}
<------>}
 
<------>/* Send HEADER_LAST_FEATURE mark. */
<------>fe = ff.buf;
<------>fe->feat_id     = HEADER_LAST_FEATURE;
<------>fe->header.type = PERF_RECORD_HEADER_FEATURE;
<------>fe->header.size = sizeof(*fe);
 
<------>ret = process(tool, ff.buf, NULL, NULL);
 
<------>free(ff.buf);
<------>return ret;
}