From b7a16eac5e679fb5f531b9eeff7db7952303e77d Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Wed, 27 May 2009 13:35:35 +0200 Subject: perf_counter: tools: /usr/lib/debug%s.debug support Some distros seem to store debuginfo in weird places. Signed-off-by: Peter Zijlstra Cc: Mike Galbraith Cc: Paul Mackerras Cc: Corey Ashford Cc: Marcelo Tosatti Cc: Arnaldo Carvalho de Melo Cc: Thomas Gleixner Cc: John Kacur LKML-Reference: Signed-off-by: Ingo Molnar --- Documentation/perf_counter/builtin-report.c | 94 +++++++++++++++++++++++------ 1 file changed, 76 insertions(+), 18 deletions(-) diff --git a/Documentation/perf_counter/builtin-report.c b/Documentation/perf_counter/builtin-report.c index 6265bedcd93..a9ff49a4ede 100644 --- a/Documentation/perf_counter/builtin-report.c +++ b/Documentation/perf_counter/builtin-report.c @@ -190,7 +190,8 @@ static inline int elf_sym__is_function(const GElf_Sym *sym) { return elf_sym__type(sym) == STT_FUNC && sym->st_name != 0 && - sym->st_shndx != SHN_UNDEF; + sym->st_shndx != SHN_UNDEF && + sym->st_size != 0; } static inline const char *elf_sym__name(const GElf_Sym *sym, @@ -222,11 +223,11 @@ static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, return sec; } -static int dso__load(struct dso *self) +static int dso__load_sym(struct dso *self, int fd, char *name) { Elf_Data *symstrs; uint32_t nr_syms; - int fd, err = -1; + int err = -1; uint32_t index; GElf_Ehdr ehdr; GElf_Shdr shdr; @@ -234,16 +235,12 @@ static int dso__load(struct dso *self) GElf_Sym sym; Elf_Scn *sec; Elf *elf; - - - fd = open(self->name, O_RDONLY); - if (fd == -1) - return -1; + int nr = 0; elf = elf_begin(fd, ELF_C_READ_MMAP, NULL); if (elf == NULL) { fprintf(stderr, "%s: cannot read %s ELF file.\n", - __func__, self->name); + __func__, name); goto out_close; } @@ -292,16 +289,63 @@ static int dso__load(struct dso *self) goto out_elf_end; dso__insert_symbol(self, f); + + nr++; } - err = 0; + err = nr; out_elf_end: elf_end(elf); out_close: - close(fd); return err; } +static int dso__load(struct dso *self) +{ + int size = strlen(self->name) + sizeof("/usr/lib/debug%s.debug"); + char *name = malloc(size); + int variant = 0; + int ret = -1; + int fd; + + if (!name) + return -1; + +more: + do { + switch (variant) { + case 0: /* Fedora */ + snprintf(name, size, "/usr/lib/debug%s.debug", self->name); + break; + case 1: /* Ubuntu */ + snprintf(name, size, "/usr/lib/debug%s", self->name); + break; + case 2: /* Sane people */ + snprintf(name, size, "%s", self->name); + break; + + default: + goto out; + } + variant++; + + fd = open(name, O_RDONLY); + } while (fd < 0); + + ret = dso__load_sym(self, fd, name); + close(fd); + + /* + * Some people seem to have debuginfo files _WITHOUT_ debug info!?!? + */ + if (!ret) + goto more; + +out: + free(name); + return ret; +} + static size_t dso__fprintf(struct dso *self, FILE *fp) { size_t ret = fprintf(fp, "dso: %s\n", self->name); @@ -336,11 +380,23 @@ static struct dso *dsos__find(const char *name) static struct dso *dsos__findnew(const char *name) { struct dso *dso = dsos__find(name); + int nr; if (dso == NULL) { dso = dso__new(name); - if (dso != NULL && dso__load(dso) < 0) + if (!dso) + goto out_delete_dso; + + nr = dso__load(dso); + if (nr < 0) { + fprintf(stderr, "Failed to open: %s\n", name); goto out_delete_dso; + } + if (!nr) { + fprintf(stderr, + "Failed to find debug symbols for: %s, maybe install a debug package?\n", + name); + } dsos__add(dso); } @@ -547,9 +603,9 @@ symhist__fprintf(struct symhist *self, uint64_t total_samples, FILE *fp) size_t ret; if (total_samples) - ret = fprintf(fp, "%5.2f", (self->count * 100.0) / total_samples); + ret = fprintf(fp, "%5.2f%% ", (self->count * 100.0) / total_samples); else - ret = fprintf(fp, "%12d", self->count); + ret = fprintf(fp, "%12d ", self->count); ret += fprintf(fp, "%14s [%c] ", thread__name(self->thread, bf, sizeof(bf)), @@ -922,10 +978,12 @@ more: } default: { broken_event: - fprintf(stderr, "%p [%p]: skipping unknown header type: %d\n", - (void *)(offset + head), - (void *)(long)(event->header.size), - event->header.type); + if (dump_trace) + fprintf(stderr, "%p [%p]: skipping unknown header type: %d\n", + (void *)(offset + head), + (void *)(long)(event->header.size), + event->header.type); + total_unknown++; /* -- cgit v1.2.3