^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * probe-finder.c : C expression to kprobe event converter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Written by Masami Hiramatsu <mhiramat@redhat.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <inttypes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <sys/utsname.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <sys/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <sys/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <stdarg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <dwarf-regs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/zalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "event.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include "dso.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "debug.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include "intlist.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include "strbuf.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include "strlist.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include "symbol.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include "probe-finder.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include "probe-file.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include "string2.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #ifdef HAVE_DEBUGINFOD_SUPPORT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <elfutils/debuginfod.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) /* Kprobe tracer basic type is up to u64 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define MAX_BASIC_TYPE_BITS 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /* Dwarf FL wrappers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static char *debuginfo_path; /* Currently dummy */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static const Dwfl_Callbacks offline_callbacks = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) .find_debuginfo = dwfl_standard_find_debuginfo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) .debuginfo_path = &debuginfo_path,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) .section_address = dwfl_offline_section_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) /* We use this table for core files too. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) .find_elf = dwfl_build_id_find_elf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) /* Get a Dwarf from offline image */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static int debuginfo__init_offline_dwarf(struct debuginfo *dbg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) const char *path)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) GElf_Addr dummy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) int fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) fd = open(path, O_RDONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (fd < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) dbg->dwfl = dwfl_begin(&offline_callbacks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (!dbg->dwfl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) dwfl_report_begin(dbg->dwfl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) dbg->mod = dwfl_report_offline(dbg->dwfl, "", "", fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (!dbg->mod)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) dbg->dbg = dwfl_module_getdwarf(dbg->mod, &dbg->bias);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (!dbg->dbg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) dwfl_module_build_id(dbg->mod, &dbg->build_id, &dummy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) dwfl_report_end(dbg->dwfl, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (dbg->dwfl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) dwfl_end(dbg->dwfl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) close(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) memset(dbg, 0, sizeof(*dbg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static struct debuginfo *__debuginfo__new(const char *path)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) struct debuginfo *dbg = zalloc(sizeof(*dbg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (!dbg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if (debuginfo__init_offline_dwarf(dbg, path) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) zfree(&dbg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (dbg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) pr_debug("Open Debuginfo file: %s\n", path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return dbg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) enum dso_binary_type distro_dwarf_types[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) DSO_BINARY_TYPE__FEDORA_DEBUGINFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) DSO_BINARY_TYPE__UBUNTU_DEBUGINFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) DSO_BINARY_TYPE__BUILDID_DEBUGINFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) DSO_BINARY_TYPE__NOT_FOUND,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) struct debuginfo *debuginfo__new(const char *path)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) enum dso_binary_type *type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) char buf[PATH_MAX], nil = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) struct dso *dso;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct debuginfo *dinfo = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) /* Try to open distro debuginfo files */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) dso = dso__new(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if (!dso)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) for (type = distro_dwarf_types;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) !dinfo && *type != DSO_BINARY_TYPE__NOT_FOUND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) type++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (dso__read_binary_type_filename(dso, *type, &nil,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) buf, PATH_MAX) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) dinfo = __debuginfo__new(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) dso__put(dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) /* if failed to open all distro debuginfo, open given binary */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return dinfo ? : __debuginfo__new(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) void debuginfo__delete(struct debuginfo *dbg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (dbg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (dbg->dwfl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) dwfl_end(dbg->dwfl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) free(dbg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) * Probe finder related functions
^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) static struct probe_trace_arg_ref *alloc_trace_arg_ref(long offs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) struct probe_trace_arg_ref *ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) ref = zalloc(sizeof(struct probe_trace_arg_ref));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if (ref != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) ref->offset = offs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) * Convert a location into trace_arg.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * If tvar == NULL, this just checks variable can be converted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) * If fentry == true and vr_die is a parameter, do huristic search
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) * for the location fuzzed by function entry mcount.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) static int convert_variable_location(Dwarf_Die *vr_die, Dwarf_Addr addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) Dwarf_Op *fb_ops, Dwarf_Die *sp_die,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) unsigned int machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) struct probe_trace_arg *tvar)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) Dwarf_Attribute attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) Dwarf_Addr tmp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) Dwarf_Op *op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) size_t nops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) unsigned int regn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) Dwarf_Word offs = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) bool ref = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) const char *regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) int ret, ret2 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if (dwarf_attr(vr_die, DW_AT_external, &attr) != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) goto static_var;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) /* Constant value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (dwarf_attr(vr_die, DW_AT_const_value, &attr) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) immediate_value_is_supported()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) Dwarf_Sword snum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if (!tvar)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) dwarf_formsdata(&attr, &snum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) ret = asprintf(&tvar->value, "\\%ld", (long)snum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) return ret < 0 ? -ENOMEM : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) /* TODO: handle more than 1 exprs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) if (dwarf_attr(vr_die, DW_AT_location, &attr) == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) return -EINVAL; /* Broken DIE ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) if (dwarf_getlocation_addr(&attr, addr, &op, &nops, 1) <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) ret = dwarf_entrypc(sp_die, &tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) if (probe_conf.show_location_range &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) (dwarf_tag(vr_die) == DW_TAG_variable)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) ret2 = -ERANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) } else if (addr != tmp ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) dwarf_tag(vr_die) != DW_TAG_formal_parameter) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) ret = dwarf_highpc(sp_die, &tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) * This is fuzzed by fentry mcount. We try to find the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) * parameter location at the earliest address.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) for (addr += 1; addr <= tmp; addr++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) if (dwarf_getlocation_addr(&attr, addr, &op,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) &nops, 1) > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) goto found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) found:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (nops == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) /* TODO: Support const_value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) if (op->atom == DW_OP_addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) static_var:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (!tvar)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) return ret2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) /* Static variables on memory (not stack), make @varname */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) ret = strlen(dwarf_diename(vr_die));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) tvar->value = zalloc(ret + 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) if (tvar->value == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) snprintf(tvar->value, ret + 2, "@%s", dwarf_diename(vr_die));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) tvar->ref = alloc_trace_arg_ref((long)offs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) if (tvar->ref == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) return ret2;
^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) /* If this is based on frame buffer, set the offset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) if (op->atom == DW_OP_fbreg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) if (fb_ops == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) return -ENOTSUP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) ref = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) offs = op->number;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) op = &fb_ops[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) if (op->atom >= DW_OP_breg0 && op->atom <= DW_OP_breg31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) regn = op->atom - DW_OP_breg0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) offs += op->number;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) ref = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) } else if (op->atom >= DW_OP_reg0 && op->atom <= DW_OP_reg31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) regn = op->atom - DW_OP_reg0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) } else if (op->atom == DW_OP_bregx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) regn = op->number;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) offs += op->number2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) ref = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) } else if (op->atom == DW_OP_regx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) regn = op->number;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) pr_debug("DW_OP %x is not supported.\n", op->atom);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) return -ENOTSUP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) if (!tvar)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) return ret2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) regs = get_dwarf_regstr(regn, machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) if (!regs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) /* This should be a bug in DWARF or this tool */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) pr_warning("Mapping for the register number %u "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) "missing on this architecture.\n", regn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) return -ENOTSUP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) tvar->value = strdup(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) if (tvar->value == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) if (ref) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) tvar->ref = alloc_trace_arg_ref((long)offs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) if (tvar->ref == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) return ret2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) #define BYTES_TO_BITS(nb) ((nb) * BITS_PER_LONG / sizeof(long))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) static int convert_variable_type(Dwarf_Die *vr_die,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) struct probe_trace_arg *tvar,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) const char *cast, bool user_access)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) struct probe_trace_arg_ref **ref_ptr = &tvar->ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) Dwarf_Die type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) char buf[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) char sbuf[STRERR_BUFSIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) int bsize, boffs, total;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) char prefix;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) /* TODO: check all types */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) if (cast && strcmp(cast, "string") != 0 && strcmp(cast, "ustring") &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) strcmp(cast, "x") != 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) strcmp(cast, "s") != 0 && strcmp(cast, "u") != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) /* Non string type is OK */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) /* and respect signedness/hexadecimal cast */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) tvar->type = strdup(cast);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) return (tvar->type == NULL) ? -ENOMEM : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) bsize = dwarf_bitsize(vr_die);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) if (bsize > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) /* This is a bitfield */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) boffs = dwarf_bitoffset(vr_die);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) total = dwarf_bytesize(vr_die);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) if (boffs < 0 || total < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) ret = snprintf(buf, 16, "b%d@%d/%zd", bsize, boffs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) BYTES_TO_BITS(total));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) goto formatted;
^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) if (die_get_real_type(vr_die, &type) == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) pr_warning("Failed to get a type information of %s.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) dwarf_diename(vr_die));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) pr_debug("%s type is %s.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) dwarf_diename(vr_die), dwarf_diename(&type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) if (cast && (!strcmp(cast, "string") || !strcmp(cast, "ustring"))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) /* String type */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) ret = dwarf_tag(&type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) if (ret != DW_TAG_pointer_type &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) ret != DW_TAG_array_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) pr_warning("Failed to cast into string: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) "%s(%s) is not a pointer nor array.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) dwarf_diename(vr_die), dwarf_diename(&type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) if (die_get_real_type(&type, &type) == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) pr_warning("Failed to get a type"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) " information.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) if (ret == DW_TAG_pointer_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) while (*ref_ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) ref_ptr = &(*ref_ptr)->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) /* Add new reference with offset +0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) *ref_ptr = zalloc(sizeof(struct probe_trace_arg_ref));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) if (*ref_ptr == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) pr_warning("Out of memory error\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) (*ref_ptr)->user_access = user_access;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) if (!die_compare_name(&type, "char") &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) !die_compare_name(&type, "unsigned char")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) pr_warning("Failed to cast into string: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) "%s is not (unsigned) char *.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) dwarf_diename(vr_die));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) tvar->type = strdup(cast);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) return (tvar->type == NULL) ? -ENOMEM : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) if (cast && (strcmp(cast, "u") == 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) prefix = 'u';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) else if (cast && (strcmp(cast, "s") == 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) prefix = 's';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) else if (cast && (strcmp(cast, "x") == 0) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) probe_type_is_available(PROBE_TYPE_X))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) prefix = 'x';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) prefix = die_is_signed_type(&type) ? 's' :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) probe_type_is_available(PROBE_TYPE_X) ? 'x' : 'u';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) ret = dwarf_bytesize(&type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) if (ret <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) /* No size ... try to use default type */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) ret = BYTES_TO_BITS(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) /* Check the bitwidth */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) if (ret > MAX_BASIC_TYPE_BITS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) pr_info("%s exceeds max-bitwidth. Cut down to %d bits.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) dwarf_diename(&type), MAX_BASIC_TYPE_BITS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) ret = MAX_BASIC_TYPE_BITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) ret = snprintf(buf, 16, "%c%d", prefix, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) formatted:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) if (ret < 0 || ret >= 16) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) if (ret >= 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) ret = -E2BIG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) pr_warning("Failed to convert variable type: %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) str_error_r(-ret, sbuf, sizeof(sbuf)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) tvar->type = strdup(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) if (tvar->type == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) static int convert_variable_fields(Dwarf_Die *vr_die, const char *varname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) struct perf_probe_arg_field *field,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) struct probe_trace_arg_ref **ref_ptr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) Dwarf_Die *die_mem, bool user_access)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) struct probe_trace_arg_ref *ref = *ref_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) Dwarf_Die type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) Dwarf_Word offs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) int ret, tag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) pr_debug("converting %s in %s\n", field->name, varname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) if (die_get_real_type(vr_die, &type) == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) pr_warning("Failed to get the type of %s.\n", varname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) pr_debug2("Var real type: %s (%x)\n", dwarf_diename(&type),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) (unsigned)dwarf_dieoffset(&type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) tag = dwarf_tag(&type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) if (field->name[0] == '[' &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) (tag == DW_TAG_array_type || tag == DW_TAG_pointer_type)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) /* Save original type for next field or type */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) memcpy(die_mem, &type, sizeof(*die_mem));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) /* Get the type of this array */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) if (die_get_real_type(&type, &type) == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) pr_warning("Failed to get the type of %s.\n", varname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) pr_debug2("Array real type: %s (%x)\n", dwarf_diename(&type),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) (unsigned)dwarf_dieoffset(&type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) if (tag == DW_TAG_pointer_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) ref = zalloc(sizeof(struct probe_trace_arg_ref));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) if (ref == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) if (*ref_ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) (*ref_ptr)->next = ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) *ref_ptr = ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) ref->offset += dwarf_bytesize(&type) * field->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) ref->user_access = user_access;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) goto next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) } else if (tag == DW_TAG_pointer_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) /* Check the pointer and dereference */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) if (!field->ref) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) pr_err("Semantic error: %s must be referred by '->'\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) field->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) /* Get the type pointed by this pointer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) if (die_get_real_type(&type, &type) == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) pr_warning("Failed to get the type of %s.\n", varname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) /* Verify it is a data structure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) tag = dwarf_tag(&type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) if (tag != DW_TAG_structure_type && tag != DW_TAG_union_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) pr_warning("%s is not a data structure nor a union.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) varname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) ref = zalloc(sizeof(struct probe_trace_arg_ref));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) if (ref == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) if (*ref_ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) (*ref_ptr)->next = ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) *ref_ptr = ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) /* Verify it is a data structure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) if (tag != DW_TAG_structure_type && tag != DW_TAG_union_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) pr_warning("%s is not a data structure nor a union.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) varname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) if (field->name[0] == '[') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) pr_err("Semantic error: %s is not a pointer"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) " nor array.\n", varname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) /* While prcessing unnamed field, we don't care about this */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) if (field->ref && dwarf_diename(vr_die)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) pr_err("Semantic error: %s must be referred by '.'\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) field->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) if (!ref) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) pr_warning("Structure on a register is not "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) "supported yet.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) return -ENOTSUP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) if (die_find_member(&type, field->name, die_mem) == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) pr_warning("%s(type:%s) has no member %s.\n", varname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) dwarf_diename(&type), field->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) return -EINVAL;
^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) /* Get the offset of the field */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) if (tag == DW_TAG_union_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) offs = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) ret = die_get_data_member_location(die_mem, &offs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) pr_warning("Failed to get the offset of %s.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) field->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) ref->offset += (long)offs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) ref->user_access = user_access;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) /* If this member is unnamed, we need to reuse this field */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) if (!dwarf_diename(die_mem))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) return convert_variable_fields(die_mem, varname, field,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) &ref, die_mem, user_access);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) next:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) /* Converting next field */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) if (field->next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) return convert_variable_fields(die_mem, field->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) field->next, &ref, die_mem, user_access);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) static void print_var_not_found(const char *varname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) pr_err("Failed to find the location of the '%s' variable at this address.\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) " Perhaps it has been optimized out.\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) " Use -V with the --range option to show '%s' location range.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) varname, varname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) /* Show a variables in kprobe event format */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) static int convert_variable(Dwarf_Die *vr_die, struct probe_finder *pf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) Dwarf_Die die_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) pr_debug("Converting variable %s into trace event.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) dwarf_diename(vr_die));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) ret = convert_variable_location(vr_die, pf->addr, pf->fb_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) &pf->sp_die, pf->machine, pf->tvar);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) if (ret == -ENOENT && pf->skip_empty_arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) /* This can be found in other place. skip it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) if (ret == -ENOENT || ret == -EINVAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) print_var_not_found(pf->pvar->var);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) } else if (ret == -ENOTSUP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) pr_err("Sorry, we don't support this variable location yet.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) else if (ret == 0 && pf->pvar->field) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) ret = convert_variable_fields(vr_die, pf->pvar->var,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) pf->pvar->field, &pf->tvar->ref,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) &die_mem, pf->pvar->user_access);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) vr_die = &die_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) if (ret == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) ret = convert_variable_type(vr_die, pf->tvar, pf->pvar->type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) pf->pvar->user_access);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) /* *expr will be cached in libdw. Don't free it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) /* Find a variable in a scope DIE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) static int find_variable(Dwarf_Die *sc_die, struct probe_finder *pf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) Dwarf_Die vr_die;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) char *buf, *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) /* Copy raw parameters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) if (!is_c_varname(pf->pvar->var))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) return copy_to_probe_trace_arg(pf->tvar, pf->pvar);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) if (pf->pvar->name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) pf->tvar->name = strdup(pf->pvar->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) buf = synthesize_perf_probe_arg(pf->pvar);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) if (!buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) ptr = strchr(buf, ':'); /* Change type separator to _ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) if (ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) *ptr = '_';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) pf->tvar->name = buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) if (pf->tvar->name == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) pr_debug("Searching '%s' variable in context.\n", pf->pvar->var);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) /* Search child die for local variables and parameters. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) if (!die_find_variable_at(sc_die, pf->pvar->var, pf->addr, &vr_die)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) /* Search again in global variables */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) if (!die_find_variable_at(&pf->cu_die, pf->pvar->var,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) 0, &vr_die)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) if (pf->skip_empty_arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) pr_warning("Failed to find '%s' in this function.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) pf->pvar->var);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) ret = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) if (ret >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) ret = convert_variable(&vr_die, pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) /* Convert subprogram DIE to trace point */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) static int convert_to_trace_point(Dwarf_Die *sp_die, Dwfl_Module *mod,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) Dwarf_Addr paddr, bool retprobe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) const char *function,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) struct probe_trace_point *tp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) Dwarf_Addr eaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) GElf_Sym sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) const char *symbol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) /* Verify the address is correct */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) if (!dwarf_haspc(sp_die, paddr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) pr_warning("Specified offset is out of %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) dwarf_diename(sp_die));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) if (dwarf_entrypc(sp_die, &eaddr) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) /* If the DIE has entrypc, use it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) symbol = dwarf_diename(sp_die);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) /* Try to get actual symbol name and address from symtab */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) symbol = dwfl_module_addrsym(mod, paddr, &sym, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) eaddr = sym.st_value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) if (!symbol) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) pr_warning("Failed to find symbol at 0x%lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) (unsigned long)paddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) tp->offset = (unsigned long)(paddr - eaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) tp->address = (unsigned long)paddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) tp->symbol = strdup(symbol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) if (!tp->symbol)
^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 probe must be on the head of a subprogram */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) if (retprobe) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) if (eaddr != paddr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) pr_warning("Failed to find \"%s%%return\",\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) " because %s is an inlined function and"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) " has no return point.\n", function,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) function);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) tp->retprobe = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) /* Call probe_finder callback with scope DIE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) static int call_probe_finder(Dwarf_Die *sc_die, struct probe_finder *pf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) Dwarf_Attribute fb_attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) Dwarf_Frame *frame = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) size_t nops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) if (!sc_die) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) pr_err("Caller must pass a scope DIE. Program error.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) /* If not a real subprogram, find a real one */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) if (!die_is_func_def(sc_die)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) if (!die_find_realfunc(&pf->cu_die, pf->addr, &pf->sp_die)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) if (die_find_tailfunc(&pf->cu_die, pf->addr, &pf->sp_die)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) pr_warning("Ignoring tail call from %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) dwarf_diename(&pf->sp_die));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) pr_warning("Failed to find probe point in any "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) "functions.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) memcpy(&pf->sp_die, sc_die, sizeof(Dwarf_Die));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) /* Get the frame base attribute/ops from subprogram */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) dwarf_attr(&pf->sp_die, DW_AT_frame_base, &fb_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) ret = dwarf_getlocation_addr(&fb_attr, pf->addr, &pf->fb_ops, &nops, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) if (ret <= 0 || nops == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) pf->fb_ops = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) #if _ELFUTILS_PREREQ(0, 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) } else if (nops == 1 && pf->fb_ops[0].atom == DW_OP_call_frame_cfa &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) (pf->cfi_eh != NULL || pf->cfi_dbg != NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) if ((dwarf_cfi_addrframe(pf->cfi_eh, pf->addr, &frame) != 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) (dwarf_cfi_addrframe(pf->cfi_dbg, pf->addr, &frame) != 0)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) dwarf_frame_cfa(frame, &pf->fb_ops, &nops) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) pr_warning("Failed to get call frame on 0x%jx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) (uintmax_t)pf->addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) free(frame);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) /* Call finder's callback handler */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) ret = pf->callback(sc_die, pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) /* Since *pf->fb_ops can be a part of frame. we should free it here. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) free(frame);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) pf->fb_ops = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) struct find_scope_param {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) const char *function;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) const char *file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) int line;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) int diff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) Dwarf_Die *die_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) bool found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) static int find_best_scope_cb(Dwarf_Die *fn_die, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) struct find_scope_param *fsp = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) const char *file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) int lno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) /* Skip if declared file name does not match */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) if (fsp->file) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) file = dwarf_decl_file(fn_die);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) if (!file || strcmp(fsp->file, file) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) /* If the function name is given, that's what user expects */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) if (fsp->function) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) if (die_match_name(fn_die, fsp->function)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) memcpy(fsp->die_mem, fn_die, sizeof(Dwarf_Die));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) fsp->found = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) /* With the line number, find the nearest declared DIE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) dwarf_decl_line(fn_die, &lno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) if (lno < fsp->line && fsp->diff > fsp->line - lno) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) /* Keep a candidate and continue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) fsp->diff = fsp->line - lno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) memcpy(fsp->die_mem, fn_die, sizeof(Dwarf_Die));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) fsp->found = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) }
^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) /* Return innermost DIE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) static int find_inner_scope_cb(Dwarf_Die *fn_die, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) struct find_scope_param *fsp = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) memcpy(fsp->die_mem, fn_die, sizeof(Dwarf_Die));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) fsp->found = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) /* Find an appropriate scope fits to given conditions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) static Dwarf_Die *find_best_scope(struct probe_finder *pf, Dwarf_Die *die_mem)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) struct find_scope_param fsp = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) .function = pf->pev->point.function,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) .file = pf->fname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) .line = pf->lno,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) .diff = INT_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) .die_mem = die_mem,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) .found = false,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) ret = cu_walk_functions_at(&pf->cu_die, pf->addr, find_best_scope_cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) &fsp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) if (!ret && !fsp.found)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) cu_walk_functions_at(&pf->cu_die, pf->addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) find_inner_scope_cb, &fsp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) return fsp.found ? die_mem : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) static int verify_representive_line(struct probe_finder *pf, const char *fname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) int lineno, Dwarf_Addr addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) const char *__fname, *__func = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) Dwarf_Die die_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) int __lineno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) /* Verify line number and address by reverse search */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) if (cu_find_lineinfo(&pf->cu_die, addr, &__fname, &__lineno) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) pr_debug2("Reversed line: %s:%d\n", __fname, __lineno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) if (strcmp(fname, __fname) || lineno == __lineno)
^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) pr_warning("This line is sharing the address with other lines.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) if (pf->pev->point.function) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) /* Find best match function name and lines */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) pf->addr = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) if (find_best_scope(pf, &die_mem)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) && die_match_name(&die_mem, pf->pev->point.function)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) && dwarf_decl_line(&die_mem, &lineno) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) __func = dwarf_diename(&die_mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) __lineno -= lineno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) pr_warning("Please try to probe at %s:%d instead.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) __func ? : __fname, __lineno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) static int probe_point_line_walker(const char *fname, int lineno,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) Dwarf_Addr addr, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) struct probe_finder *pf = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) Dwarf_Die *sc_die, die_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) if (lineno != pf->lno || strtailcmp(fname, pf->fname) != 0)
^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) if (verify_representive_line(pf, fname, lineno, addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) pf->addr = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) sc_die = find_best_scope(pf, &die_mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) if (!sc_die) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) pr_warning("Failed to find scope of probe point.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) ret = call_probe_finder(sc_die, pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) /* Continue if no error, because the line will be in inline function */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) return ret < 0 ? ret : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) /* Find probe point from its line number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) static int find_probe_point_by_line(struct probe_finder *pf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) return die_walk_lines(&pf->cu_die, probe_point_line_walker, pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) /* Find lines which match lazy pattern */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) static int find_lazy_match_lines(struct intlist *list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) const char *fname, const char *pat)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) FILE *fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) char *line = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) size_t line_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) ssize_t len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) int count = 0, linenum = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) char sbuf[STRERR_BUFSIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) fp = fopen(fname, "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) if (!fp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) pr_warning("Failed to open %s: %s\n", fname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) str_error_r(errno, sbuf, sizeof(sbuf)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) return -errno;
^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) while ((len = getline(&line, &line_len, fp)) > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) if (line[len - 1] == '\n')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) line[len - 1] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) if (strlazymatch(line, pat)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) intlist__add(list, linenum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) linenum++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) if (ferror(fp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) count = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) free(line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) fclose(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) if (count == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) pr_debug("No matched lines found in %s.\n", fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) return count;
^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) static int probe_point_lazy_walker(const char *fname, int lineno,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) Dwarf_Addr addr, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) struct probe_finder *pf = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) Dwarf_Die *sc_die, die_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) if (!intlist__has_entry(pf->lcache, lineno) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) strtailcmp(fname, pf->fname) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) pr_debug("Probe line found: line:%d addr:0x%llx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) lineno, (unsigned long long)addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) pf->addr = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) pf->lno = lineno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) sc_die = find_best_scope(pf, &die_mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) if (!sc_die) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) pr_warning("Failed to find scope of probe point.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) ret = call_probe_finder(sc_die, pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) * Continue if no error, because the lazy pattern will match
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) * to other lines
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) return ret < 0 ? ret : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) /* Find probe points from lazy pattern */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) static int find_probe_point_lazy(Dwarf_Die *sp_die, struct probe_finder *pf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) struct build_id bid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) char sbuild_id[SBUILD_ID_SIZE] = "";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) char *fpath;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) if (intlist__empty(pf->lcache)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) const char *comp_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) comp_dir = cu_get_comp_dir(&pf->cu_die);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) if (pf->dbg->build_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) build_id__init(&bid, pf->dbg->build_id, BUILD_ID_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) build_id__sprintf(&bid, sbuild_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) ret = find_source_path(pf->fname, sbuild_id, comp_dir, &fpath);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) pr_warning("Failed to find source file path.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) /* Matching lazy line pattern */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) ret = find_lazy_match_lines(pf->lcache, fpath,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) pf->pev->point.lazy_line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) free(fpath);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) if (ret <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) return die_walk_lines(sp_die, probe_point_lazy_walker, pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) static void skip_prologue(Dwarf_Die *sp_die, struct probe_finder *pf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) struct perf_probe_point *pp = &pf->pev->point;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) /* Not uprobe? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) if (!pf->pev->uprobes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) /* Compiled with optimization? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) if (die_is_optimized_target(&pf->cu_die))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) /* Don't know entrypc? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) if (!pf->addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) /* Only FUNC and FUNC@SRC are eligible. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) if (!pp->function || pp->line || pp->retprobe || pp->lazy_line ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) pp->offset || pp->abs_address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) /* Not interested in func parameter? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) if (!perf_probe_with_var(pf->pev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) pr_info("Target program is compiled without optimization. Skipping prologue.\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) "Probe on address 0x%" PRIx64 " to force probing at the function entry.\n\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) pf->addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) die_skip_prologue(sp_die, &pf->cu_die, &pf->addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) static int probe_point_inline_cb(Dwarf_Die *in_die, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) struct probe_finder *pf = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) struct perf_probe_point *pp = &pf->pev->point;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) Dwarf_Addr addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) if (pp->lazy_line)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) ret = find_probe_point_lazy(in_die, pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) /* Get probe address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) if (die_entrypc(in_die, &addr) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) pr_warning("Failed to get entry address of %s.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) dwarf_diename(in_die));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) if (addr == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) pr_debug("%s has no valid entry address. skipped.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) dwarf_diename(in_die));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) pf->addr = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) pf->addr += pp->offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) pr_debug("found inline addr: 0x%jx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) (uintmax_t)pf->addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) ret = call_probe_finder(in_die, pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) /* Callback parameter with return value for libdw */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) struct dwarf_callback_param {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) void *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) /* Search function from function name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) static int probe_point_search_cb(Dwarf_Die *sp_die, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) struct dwarf_callback_param *param = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) struct probe_finder *pf = param->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) struct perf_probe_point *pp = &pf->pev->point;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) /* Check tag and diename */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) if (!die_is_func_def(sp_die) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) !die_match_name(sp_die, pp->function))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) return DWARF_CB_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) /* Check declared file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) if (pp->file && strtailcmp(pp->file, dwarf_decl_file(sp_die)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) return DWARF_CB_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) pr_debug("Matched function: %s [%lx]\n", dwarf_diename(sp_die),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) (unsigned long)dwarf_dieoffset(sp_die));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) pf->fname = dwarf_decl_file(sp_die);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) if (pp->line) { /* Function relative line */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) dwarf_decl_line(sp_die, &pf->lno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) pf->lno += pp->line;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) param->retval = find_probe_point_by_line(pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) } else if (die_is_func_instance(sp_die)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) /* Instances always have the entry address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) die_entrypc(sp_die, &pf->addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) /* But in some case the entry address is 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) if (pf->addr == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) pr_debug("%s has no entry PC. Skipped\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) dwarf_diename(sp_die));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) param->retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) /* Real function */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) } else if (pp->lazy_line)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) param->retval = find_probe_point_lazy(sp_die, pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) skip_prologue(sp_die, pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) pf->addr += pp->offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) /* TODO: Check the address in this function */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) param->retval = call_probe_finder(sp_die, pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) } else if (!probe_conf.no_inlines) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) /* Inlined function: search instances */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) param->retval = die_walk_instances(sp_die,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) probe_point_inline_cb, (void *)pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) /* This could be a non-existed inline definition */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) if (param->retval == -ENOENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) param->retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) /* We need to find other candidates */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) if (strisglob(pp->function) && param->retval >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) param->retval = 0; /* We have to clear the result */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) return DWARF_CB_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) return DWARF_CB_ABORT; /* Exit; no same symbol in this CU. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) static int find_probe_point_by_func(struct probe_finder *pf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) struct dwarf_callback_param _param = {.data = (void *)pf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) .retval = 0};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) dwarf_getfuncs(&pf->cu_die, probe_point_search_cb, &_param, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) return _param.retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) struct pubname_callback_param {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) char *function;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) char *file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) Dwarf_Die *cu_die;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) Dwarf_Die *sp_die;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) int found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) static int pubname_search_cb(Dwarf *dbg, Dwarf_Global *gl, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) struct pubname_callback_param *param = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) if (dwarf_offdie(dbg, gl->die_offset, param->sp_die)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) if (dwarf_tag(param->sp_die) != DW_TAG_subprogram)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) return DWARF_CB_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) if (die_match_name(param->sp_die, param->function)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) if (!dwarf_offdie(dbg, gl->cu_offset, param->cu_die))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) return DWARF_CB_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) if (param->file &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) strtailcmp(param->file, dwarf_decl_file(param->sp_die)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) return DWARF_CB_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) param->found = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) return DWARF_CB_ABORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) return DWARF_CB_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) static int debuginfo__find_probe_location(struct debuginfo *dbg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) struct probe_finder *pf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) struct perf_probe_point *pp = &pf->pev->point;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) Dwarf_Off off, noff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) size_t cuhl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) Dwarf_Die *diep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) off = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) pf->lcache = intlist__new(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) if (!pf->lcache)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) /* Fastpath: lookup by function name from .debug_pubnames section */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) if (pp->function && !strisglob(pp->function)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) struct pubname_callback_param pubname_param = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) .function = pp->function,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) .file = pp->file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) .cu_die = &pf->cu_die,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) .sp_die = &pf->sp_die,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) .found = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) struct dwarf_callback_param probe_param = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) .data = pf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) dwarf_getpubnames(dbg->dbg, pubname_search_cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) &pubname_param, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) if (pubname_param.found) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) ret = probe_point_search_cb(&pf->sp_die, &probe_param);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) goto found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) /* Loop on CUs (Compilation Unit) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) while (!dwarf_nextcu(dbg->dbg, off, &noff, &cuhl, NULL, NULL, NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) /* Get the DIE(Debugging Information Entry) of this CU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) diep = dwarf_offdie(dbg->dbg, off + cuhl, &pf->cu_die);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) if (!diep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) /* Check if target file is included. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) if (pp->file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) pf->fname = cu_find_realpath(&pf->cu_die, pp->file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) pf->fname = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) if (!pp->file || pf->fname) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) if (pp->function)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) ret = find_probe_point_by_func(pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) else if (pp->lazy_line)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) ret = find_probe_point_lazy(&pf->cu_die, pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) pf->lno = pp->line;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) ret = find_probe_point_by_line(pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) off = noff;
^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) found:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) intlist__delete(pf->lcache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) pf->lcache = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) /* Find probe points from debuginfo */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) static int debuginfo__find_probes(struct debuginfo *dbg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) struct probe_finder *pf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) Elf *elf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) GElf_Ehdr ehdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) if (pf->cfi_eh || pf->cfi_dbg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) return debuginfo__find_probe_location(dbg, pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) /* Get the call frame information from this dwarf */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) elf = dwarf_getelf(dbg->dbg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) if (elf == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) if (gelf_getehdr(elf, &ehdr) == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) pf->machine = ehdr.e_machine;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) #if _ELFUTILS_PREREQ(0, 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) GElf_Shdr shdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) if (elf_section_by_name(elf, &ehdr, &shdr, ".eh_frame", NULL) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) shdr.sh_type == SHT_PROGBITS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) pf->cfi_eh = dwarf_getcfi_elf(elf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) pf->cfi_dbg = dwarf_getcfi(dbg->dbg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) } while (0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) ret = debuginfo__find_probe_location(dbg, pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) struct local_vars_finder {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) struct probe_finder *pf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) struct perf_probe_arg *args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) bool vars;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) int max_args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) int nargs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) /* Collect available variables in this scope */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) static int copy_variables_cb(Dwarf_Die *die_mem, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) struct local_vars_finder *vf = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) struct probe_finder *pf = vf->pf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) int tag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) tag = dwarf_tag(die_mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) if (tag == DW_TAG_formal_parameter ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) (tag == DW_TAG_variable && vf->vars)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) if (convert_variable_location(die_mem, vf->pf->addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) vf->pf->fb_ops, &pf->sp_die,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) pf->machine, NULL) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) vf->args[vf->nargs].var = (char *)dwarf_diename(die_mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) if (vf->args[vf->nargs].var == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) vf->ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) return DIE_FIND_CB_END;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) pr_debug(" %s", vf->args[vf->nargs].var);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) vf->nargs++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) if (dwarf_haspc(die_mem, vf->pf->addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) return DIE_FIND_CB_CONTINUE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) return DIE_FIND_CB_SIBLING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) static int expand_probe_args(Dwarf_Die *sc_die, struct probe_finder *pf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) struct perf_probe_arg *args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) Dwarf_Die die_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) int n = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) struct local_vars_finder vf = {.pf = pf, .args = args, .vars = false,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) .max_args = MAX_PROBE_ARGS, .ret = 0};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) for (i = 0; i < pf->pev->nargs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) /* var never be NULL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) if (strcmp(pf->pev->args[i].var, PROBE_ARG_VARS) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) vf.vars = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) else if (strcmp(pf->pev->args[i].var, PROBE_ARG_PARAMS) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) /* Copy normal argument */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) args[n] = pf->pev->args[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) n++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) pr_debug("Expanding %s into:", pf->pev->args[i].var);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) vf.nargs = n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) /* Special local variables */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) die_find_child(sc_die, copy_variables_cb, (void *)&vf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) &die_mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) pr_debug(" (%d)\n", vf.nargs - n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) if (vf.ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) return vf.ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) n = vf.nargs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) return n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) static bool trace_event_finder_overlap(struct trace_event_finder *tf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) for (i = 0; i < tf->ntevs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) if (tf->pf.addr == tf->tevs[i].point.address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) /* Add a found probe point into trace event list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) static int add_probe_trace_event(Dwarf_Die *sc_die, struct probe_finder *pf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) struct trace_event_finder *tf =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) container_of(pf, struct trace_event_finder, pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) struct perf_probe_point *pp = &pf->pev->point;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) struct probe_trace_event *tev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) struct perf_probe_arg *args = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) int ret, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) * For some reason (e.g. different column assigned to same address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) * This callback can be called with the address which already passed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) * Ignore it first.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) if (trace_event_finder_overlap(tf))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) /* Check number of tevs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) if (tf->ntevs == tf->max_tevs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) pr_warning("Too many( > %d) probe point found.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) tf->max_tevs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) return -ERANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) tev = &tf->tevs[tf->ntevs++];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) /* Trace point should be converted from subprogram DIE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) ret = convert_to_trace_point(&pf->sp_die, tf->mod, pf->addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) pp->retprobe, pp->function, &tev->point);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) tev->point.realname = strdup(dwarf_diename(sc_die));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) if (!tev->point.realname) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) pr_debug("Probe point found: %s+%lu\n", tev->point.symbol,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) tev->point.offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) /* Expand special probe argument if exist */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) args = zalloc(sizeof(struct perf_probe_arg) * MAX_PROBE_ARGS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) if (args == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) ret = expand_probe_args(sc_die, pf, args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) tev->nargs = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) if (tev->args == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) /* Find each argument */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) for (i = 0; i < tev->nargs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) pf->pvar = &args[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) pf->tvar = &tev->args[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) /* Variable should be found from scope DIE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) ret = find_variable(sc_die, pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407) if (ret != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) end:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) clear_probe_trace_event(tev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) tf->ntevs--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) free(args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) static int fill_empty_trace_arg(struct perf_probe_event *pev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) struct probe_trace_event *tevs, int ntevs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) char **valp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) char *type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) int i, j, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) if (!ntevs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) for (i = 0; i < pev->nargs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) type = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) for (j = 0; j < ntevs; j++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) if (tevs[j].args[i].value) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) type = tevs[j].args[i].type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) if (j == ntevs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) print_var_not_found(pev->args[i].var);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) for (j = 0; j < ntevs; j++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) valp = &tevs[j].args[i].value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) if (*valp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) ret = asprintf(valp, "\\%lx", probe_conf.magic_num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450) /* Note that type can be NULL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) if (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) tevs[j].args[i].type = strdup(type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) if (!tevs[j].args[i].type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) /* Find probe_trace_events specified by perf_probe_event from debuginfo */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) int debuginfo__find_trace_events(struct debuginfo *dbg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463) struct perf_probe_event *pev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) struct probe_trace_event **tevs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) struct trace_event_finder tf = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) .pf = {.pev = pev, .dbg = dbg, .callback = add_probe_trace_event},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468) .max_tevs = probe_conf.max_probes, .mod = dbg->mod};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) int ret, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) /* Allocate result tevs array */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472) *tevs = zalloc(sizeof(struct probe_trace_event) * tf.max_tevs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) if (*tevs == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) tf.tevs = *tevs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) tf.ntevs = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) if (pev->nargs != 0 && immediate_value_is_supported())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) tf.pf.skip_empty_arg = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) ret = debuginfo__find_probes(dbg, &tf.pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) if (ret >= 0 && tf.pf.skip_empty_arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) ret = fill_empty_trace_arg(pev, tf.tevs, tf.ntevs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486) if (ret < 0 || tf.ntevs == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487) for (i = 0; i < tf.ntevs; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) clear_probe_trace_event(&tf.tevs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) zfree(tevs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) return (ret < 0) ? ret : tf.ntevs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) /* Collect available variables in this scope */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) static int collect_variables_cb(Dwarf_Die *die_mem, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) struct available_var_finder *af = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) struct variable_list *vl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501) struct strbuf buf = STRBUF_INIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) int tag, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504) vl = &af->vls[af->nvls - 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) tag = dwarf_tag(die_mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) if (tag == DW_TAG_formal_parameter ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) tag == DW_TAG_variable) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509) ret = convert_variable_location(die_mem, af->pf.addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510) af->pf.fb_ops, &af->pf.sp_die,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) af->pf.machine, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) if (ret == 0 || ret == -ERANGE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) int ret2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) bool externs = !af->child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) if (strbuf_init(&buf, 64) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519) if (probe_conf.show_location_range) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520) if (!externs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) ret2 = strbuf_add(&buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522) ret ? "[INV]\t" : "[VAL]\t", 6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) ret2 = strbuf_add(&buf, "[EXT]\t", 6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) if (ret2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529) ret2 = die_get_varname(die_mem, &buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) if (!ret2 && probe_conf.show_location_range &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) !externs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) if (strbuf_addch(&buf, '\t') < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535) ret2 = die_get_var_range(&af->pf.sp_die,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) die_mem, &buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539) pr_debug("Add new var: %s\n", buf.buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) if (ret2 == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) strlist__add(vl->vars,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542) strbuf_detach(&buf, NULL));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) strbuf_release(&buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) if (af->child && dwarf_haspc(die_mem, af->pf.addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) return DIE_FIND_CB_CONTINUE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) return DIE_FIND_CB_SIBLING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) strbuf_release(&buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) pr_debug("Error in strbuf\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) return DIE_FIND_CB_END;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) static bool available_var_finder_overlap(struct available_var_finder *af)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) for (i = 0; i < af->nvls; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) if (af->pf.addr == af->vls[i].point.address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) /* Add a found vars into available variables list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) static int add_available_vars(Dwarf_Die *sc_die, struct probe_finder *pf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573) struct available_var_finder *af =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574) container_of(pf, struct available_var_finder, pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) struct perf_probe_point *pp = &pf->pev->point;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) struct variable_list *vl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) Dwarf_Die die_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581) * For some reason (e.g. different column assigned to same address),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) * this callback can be called with the address which already passed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) * Ignore it first.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) if (available_var_finder_overlap(af))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) /* Check number of tevs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) if (af->nvls == af->max_vls) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) pr_warning("Too many( > %d) probe point found.\n", af->max_vls);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) return -ERANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) vl = &af->vls[af->nvls++];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) /* Trace point should be converted from subprogram DIE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) ret = convert_to_trace_point(&pf->sp_die, af->mod, pf->addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597) pp->retprobe, pp->function, &vl->point);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) pr_debug("Probe point found: %s+%lu\n", vl->point.symbol,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) vl->point.offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) /* Find local variables */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) vl->vars = strlist__new(NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) if (vl->vars == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) af->child = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) die_find_child(sc_die, collect_variables_cb, (void *)af, &die_mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) /* Find external variables */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) if (!probe_conf.show_ext_vars)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) /* Don't need to search child DIE for external vars. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) af->child = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616) die_find_child(&pf->cu_die, collect_variables_cb, (void *)af, &die_mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) if (strlist__empty(vl->vars)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) strlist__delete(vl->vars);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621) vl->vars = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) * Find available variables at given probe point
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629) * Return the number of found probe points. Return 0 if there is no
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) * matched probe point. Return <0 if an error occurs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) int debuginfo__find_available_vars_at(struct debuginfo *dbg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633) struct perf_probe_event *pev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) struct variable_list **vls)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) struct available_var_finder af = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) .pf = {.pev = pev, .dbg = dbg, .callback = add_available_vars},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) .mod = dbg->mod,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) .max_vls = probe_conf.max_probes};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) /* Allocate result vls array */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) *vls = zalloc(sizeof(struct variable_list) * af.max_vls);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644) if (*vls == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) af.vls = *vls;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648) af.nvls = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) ret = debuginfo__find_probes(dbg, &af.pf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) /* Free vlist for error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653) while (af.nvls--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) zfree(&af.vls[af.nvls].point.symbol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655) strlist__delete(af.vls[af.nvls].vars);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657) zfree(vls);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661) return (ret < 0) ? ret : af.nvls;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664) /* For the kernel module, we need a special code to get a DIE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665) int debuginfo__get_text_offset(struct debuginfo *dbg, Dwarf_Addr *offs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666) bool adjust_offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668) int n, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669) Elf32_Word shndx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670) Elf_Scn *scn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671) Elf *elf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672) GElf_Shdr mem, *shdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673) const char *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675) elf = dwfl_module_getelf(dbg->mod, &dbg->bias);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676) if (!elf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679) /* Get the number of relocations */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680) n = dwfl_module_relocations(dbg->mod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681) if (n < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683) /* Search the relocation related .text section */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684) for (i = 0; i < n; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685) p = dwfl_module_relocation_info(dbg->mod, i, &shndx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686) if (strcmp(p, ".text") == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687) /* OK, get the section header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688) scn = elf_getscn(elf, shndx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689) if (!scn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691) shdr = gelf_getshdr(scn, &mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692) if (!shdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694) *offs = shdr->sh_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695) if (adjust_offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696) *offs -= shdr->sh_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702) /* Reverse search */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703) int debuginfo__find_probe_point(struct debuginfo *dbg, unsigned long addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704) struct perf_probe_point *ppt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706) Dwarf_Die cudie, spdie, indie;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707) Dwarf_Addr _addr = 0, baseaddr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708) const char *fname = NULL, *func = NULL, *basefunc = NULL, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) int baseline = 0, lineno = 0, ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711) /* We always need to relocate the address for aranges */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712) if (debuginfo__get_text_offset(dbg, &baseaddr, false) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713) addr += baseaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714) /* Find cu die */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715) if (!dwarf_addrdie(dbg->dbg, (Dwarf_Addr)addr, &cudie)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716) pr_warning("Failed to find debug information for address %lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1717) addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1718) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1719) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1720) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1721)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1722) /* Find a corresponding line (filename and lineno) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1723) cu_find_lineinfo(&cudie, addr, &fname, &lineno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1724) /* Don't care whether it failed or not */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1725)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1726) /* Find a corresponding function (name, baseline and baseaddr) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1727) if (die_find_realfunc(&cudie, (Dwarf_Addr)addr, &spdie)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1728) /* Get function entry information */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1729) func = basefunc = dwarf_diename(&spdie);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1730) if (!func ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1731) die_entrypc(&spdie, &baseaddr) != 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1732) dwarf_decl_line(&spdie, &baseline) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1733) lineno = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1734) goto post;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1735) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1736)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1737) fname = dwarf_decl_file(&spdie);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1738) if (addr == (unsigned long)baseaddr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1739) /* Function entry - Relative line number is 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1740) lineno = baseline;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1741) goto post;
^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) /* Track down the inline functions step by step */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1745) while (die_find_top_inlinefunc(&spdie, (Dwarf_Addr)addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1746) &indie)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1747) /* There is an inline function */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1748) if (die_entrypc(&indie, &_addr) == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1749) _addr == addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1750) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1751) * addr is at an inline function entry.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1752) * In this case, lineno should be the call-site
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1753) * line number. (overwrite lineinfo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1754) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1755) lineno = die_get_call_lineno(&indie);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1756) fname = die_get_call_file(&indie);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1757) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1758) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1759) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1760) * addr is in an inline function body.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1761) * Since lineno points one of the lines
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1762) * of the inline function, baseline should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1763) * be the entry line of the inline function.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1764) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1765) tmp = dwarf_diename(&indie);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1766) if (!tmp ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1767) dwarf_decl_line(&indie, &baseline) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1768) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1769) func = tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1770) spdie = indie;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1771) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1772) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1773) /* Verify the lineno and baseline are in a same file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1774) tmp = dwarf_decl_file(&spdie);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1775) if (!tmp || strcmp(tmp, fname) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1776) lineno = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1777) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1778)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1779) post:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1780) /* Make a relative line number or an offset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1781) if (lineno)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1782) ppt->line = lineno - baseline;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1783) else if (basefunc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1784) ppt->offset = addr - (unsigned long)baseaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1785) func = basefunc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1786) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1787)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1788) /* Duplicate strings */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1789) if (func) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1790) ppt->function = strdup(func);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1791) if (ppt->function == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1792) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1793) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1794) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1795) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1796) if (fname) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1797) ppt->file = strdup(fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1798) if (ppt->file == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1799) zfree(&ppt->function);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1800) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1801) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1802) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1803) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1804) end:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1805) if (ret == 0 && (fname || func))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1806) ret = 1; /* Found a point */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1807) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1808) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1809)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1810) /* Add a line and store the src path */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1811) static int line_range_add_line(const char *src, unsigned int lineno,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1812) struct line_range *lr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1813) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1814) /* Copy source path */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1815) if (!lr->path) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1816) lr->path = strdup(src);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1817) if (lr->path == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1818) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1819) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1820) return intlist__add(lr->line_list, lineno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1821) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1822)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1823) static int line_range_walk_cb(const char *fname, int lineno,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1824) Dwarf_Addr addr __maybe_unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1825) void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1826) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1827) struct line_finder *lf = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1828) const char *__fname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1829) int __lineno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1830) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1831)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1832) if ((strtailcmp(fname, lf->fname) != 0) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1833) (lf->lno_s > lineno || lf->lno_e < lineno))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1834) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1835)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1836) /* Make sure this line can be reversable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1837) if (cu_find_lineinfo(&lf->cu_die, addr, &__fname, &__lineno) > 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1838) && (lineno != __lineno || strcmp(fname, __fname)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1839) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1840)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1841) err = line_range_add_line(fname, lineno, lf->lr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1842) if (err < 0 && err != -EEXIST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1843) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1844)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1845) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1846) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1847)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1848) /* Find line range from its line number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1849) static int find_line_range_by_line(Dwarf_Die *sp_die, struct line_finder *lf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1850) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1851) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1852)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1853) ret = die_walk_lines(sp_die ?: &lf->cu_die, line_range_walk_cb, lf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1854)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1855) /* Update status */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1856) if (ret >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1857) if (!intlist__empty(lf->lr->line_list))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1858) ret = lf->found = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1859) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1860) ret = 0; /* Lines are not found */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1861) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1862) zfree(&lf->lr->path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1863) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1864) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1865) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1866)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1867) static int line_range_inline_cb(Dwarf_Die *in_die, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1868) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1869) int ret = find_line_range_by_line(in_die, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1870)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1871) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1872) * We have to check all instances of inlined function, because
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1873) * some execution paths can be optimized out depends on the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1874) * function argument of instances. However, if an error occurs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1875) * it should be handled by the caller.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1876) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1877) return ret < 0 ? ret : 0;
^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) /* Search function definition from function name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1881) static int line_range_search_cb(Dwarf_Die *sp_die, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1882) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1883) struct dwarf_callback_param *param = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1884) struct line_finder *lf = param->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1885) struct line_range *lr = lf->lr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1886)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1887) /* Check declared file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1888) if (lr->file && strtailcmp(lr->file, dwarf_decl_file(sp_die)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1889) return DWARF_CB_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1890)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1891) if (die_match_name(sp_die, lr->function) && die_is_func_def(sp_die)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1892) lf->fname = dwarf_decl_file(sp_die);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1893) dwarf_decl_line(sp_die, &lr->offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1894) pr_debug("fname: %s, lineno:%d\n", lf->fname, lr->offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1895) lf->lno_s = lr->offset + lr->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1896) if (lf->lno_s < 0) /* Overflow */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1897) lf->lno_s = INT_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1898) lf->lno_e = lr->offset + lr->end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1899) if (lf->lno_e < 0) /* Overflow */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1900) lf->lno_e = INT_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1901) pr_debug("New line range: %d to %d\n", lf->lno_s, lf->lno_e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1902) lr->start = lf->lno_s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1903) lr->end = lf->lno_e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1904) if (!die_is_func_instance(sp_die))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1905) param->retval = die_walk_instances(sp_die,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1906) line_range_inline_cb, lf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1907) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1908) param->retval = find_line_range_by_line(sp_die, lf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1909) return DWARF_CB_ABORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1910) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1911) return DWARF_CB_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1912) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1913)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1914) static int find_line_range_by_func(struct line_finder *lf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1915) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1916) struct dwarf_callback_param param = {.data = (void *)lf, .retval = 0};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1917) dwarf_getfuncs(&lf->cu_die, line_range_search_cb, ¶m, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1918) return param.retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1919) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1920)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1921) int debuginfo__find_line_range(struct debuginfo *dbg, struct line_range *lr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1922) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1923) struct line_finder lf = {.lr = lr, .found = 0};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1924) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1925) Dwarf_Off off = 0, noff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1926) size_t cuhl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1927) Dwarf_Die *diep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1928) const char *comp_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1929)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1930) /* Fastpath: lookup by function name from .debug_pubnames section */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1931) if (lr->function) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1932) struct pubname_callback_param pubname_param = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1933) .function = lr->function, .file = lr->file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1934) .cu_die = &lf.cu_die, .sp_die = &lf.sp_die, .found = 0};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1935) struct dwarf_callback_param line_range_param = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1936) .data = (void *)&lf, .retval = 0};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1937)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1938) dwarf_getpubnames(dbg->dbg, pubname_search_cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1939) &pubname_param, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1940) if (pubname_param.found) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1941) line_range_search_cb(&lf.sp_die, &line_range_param);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1942) if (lf.found)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1943) goto found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1944) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1945) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1946)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1947) /* Loop on CUs (Compilation Unit) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1948) while (!lf.found && ret >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1949) if (dwarf_nextcu(dbg->dbg, off, &noff, &cuhl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1950) NULL, NULL, NULL) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1951) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1952)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1953) /* Get the DIE(Debugging Information Entry) of this CU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1954) diep = dwarf_offdie(dbg->dbg, off + cuhl, &lf.cu_die);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1955) if (!diep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1956) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1957)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1958) /* Check if target file is included. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1959) if (lr->file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1960) lf.fname = cu_find_realpath(&lf.cu_die, lr->file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1961) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1962) lf.fname = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1963)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1964) if (!lr->file || lf.fname) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1965) if (lr->function)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1966) ret = find_line_range_by_func(&lf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1967) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1968) lf.lno_s = lr->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1969) lf.lno_e = lr->end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1970) ret = find_line_range_by_line(NULL, &lf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1971) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1972) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1973) off = noff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1974) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1975)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1976) found:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1977) /* Store comp_dir */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1978) if (lf.found) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1979) comp_dir = cu_get_comp_dir(&lf.cu_die);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1980) if (comp_dir) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1981) lr->comp_dir = strdup(comp_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1982) if (!lr->comp_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1983) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1984) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1985) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1986)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1987) pr_debug("path: %s\n", lr->path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1988) return (ret < 0) ? ret : lf.found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1989) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1990)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1991) #ifdef HAVE_DEBUGINFOD_SUPPORT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1992) /* debuginfod doesn't require the comp_dir but buildid is required */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1993) static int get_source_from_debuginfod(const char *raw_path,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1994) const char *sbuild_id, char **new_path)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1995) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1996) debuginfod_client *c = debuginfod_begin();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1997) const char *p = raw_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1998) int fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1999)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2000) if (!c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2001) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2002)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2003) fd = debuginfod_find_source(c, (const unsigned char *)sbuild_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2004) 0, p, new_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2005) pr_debug("Search %s from debuginfod -> %d\n", p, fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2006) if (fd >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2007) close(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2008) debuginfod_end(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2009) if (fd < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2010) pr_debug("Failed to find %s in debuginfod (%s)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2011) raw_path, sbuild_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2012) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2013) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2014) pr_debug("Got a source %s\n", *new_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2015)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2016) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2017) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2018) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2019) static inline int get_source_from_debuginfod(const char *raw_path __maybe_unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2020) const char *sbuild_id __maybe_unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2021) char **new_path __maybe_unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2022) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2023) return -ENOTSUP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2024) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2025) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2026) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2027) * Find a src file from a DWARF tag path. Prepend optional source path prefix
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2028) * and chop off leading directories that do not exist. Result is passed back as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2029) * a newly allocated path on success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2030) * Return 0 if file was found and readable, -errno otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2031) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2032) int find_source_path(const char *raw_path, const char *sbuild_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2033) const char *comp_dir, char **new_path)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2034) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2035) const char *prefix = symbol_conf.source_prefix;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2036)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2037) if (sbuild_id && !prefix) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2038) if (!get_source_from_debuginfod(raw_path, sbuild_id, new_path))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2039) return 0;
^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) if (!prefix) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2043) if (raw_path[0] != '/' && comp_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2044) /* If not an absolute path, try to use comp_dir */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2045) prefix = comp_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2046) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2047) if (access(raw_path, R_OK) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2048) *new_path = strdup(raw_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2049) return *new_path ? 0 : -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2050) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2051) return -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2052) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2053) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2054)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2055) *new_path = malloc((strlen(prefix) + strlen(raw_path) + 2));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2056) if (!*new_path)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2057) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2058)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2059) for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2060) sprintf(*new_path, "%s/%s", prefix, raw_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2061)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2062) if (access(*new_path, R_OK) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2063) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2064)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2065) if (!symbol_conf.source_prefix) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2066) /* In case of searching comp_dir, don't retry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2067) zfree(new_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2068) return -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2069) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2070)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2071) switch (errno) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2072) case ENAMETOOLONG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2073) case ENOENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2074) case EROFS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2075) case EFAULT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2076) raw_path = strchr(++raw_path, '/');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2077) if (!raw_path) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2078) zfree(new_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2079) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2080) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2081) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2082)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2083) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2084) zfree(new_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2085) return -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2086) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2087) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2088) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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