diff options
author | Frederic Weisbecker <fweisbec@gmail.com> | 2009-09-23 23:08:43 +0200 |
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committer | Frederic Weisbecker <fweisbec@gmail.com> | 2009-09-23 23:08:43 +0200 |
commit | d7a4b414eed51f1653bb05ebe84122bf9a7ae18b (patch) | |
tree | bd6603a0c27de4c138a1767871897e9cd3e1a1d2 /tools/perf/util/symbol.c | |
parent | 1f0ab40976460bc4673fa204ce917a725185d8f2 (diff) | |
parent | a724eada8c2a7b62463b73ccf73fd0bb6e928aeb (diff) |
Merge commit 'linus/master' into tracing/kprobes
Conflicts:
kernel/trace/Makefile
kernel/trace/trace.h
kernel/trace/trace_event_types.h
kernel/trace/trace_export.c
Merge reason:
Sync with latest significant tracing core changes.
Diffstat (limited to 'tools/perf/util/symbol.c')
-rw-r--r-- | tools/perf/util/symbol.c | 199 |
1 files changed, 149 insertions, 50 deletions
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 5c0f42e6b33..fd3d9c8e90f 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -3,6 +3,8 @@ #include "string.h" #include "symbol.h" +#include "debug.h" + #include <libelf.h> #include <gelf.h> #include <elf.h> @@ -21,7 +23,7 @@ enum dso_origin { static struct symbol *symbol__new(u64 start, u64 len, const char *name, unsigned int priv_size, - u64 obj_start, int verbose) + u64 obj_start, int v) { size_t namelen = strlen(name) + 1; struct symbol *self = calloc(1, priv_size + sizeof(*self) + namelen); @@ -29,7 +31,7 @@ static struct symbol *symbol__new(u64 start, u64 len, if (!self) return NULL; - if (verbose >= 2) + if (v >= 2) printf("new symbol: %016Lx [%08lx]: %s, hist: %p, obj_start: %p\n", (u64)start, (unsigned long)len, name, self->hist, (void *)(unsigned long)obj_start); @@ -156,7 +158,7 @@ size_t dso__fprintf(struct dso *self, FILE *fp) return ret; } -static int dso__load_kallsyms(struct dso *self, symbol_filter_t filter, int verbose) +static int dso__load_kallsyms(struct dso *self, symbol_filter_t filter, int v) { struct rb_node *nd, *prevnd; char *line = NULL; @@ -198,7 +200,7 @@ static int dso__load_kallsyms(struct dso *self, symbol_filter_t filter, int verb * Well fix up the end later, when we have all sorted. */ sym = symbol__new(start, 0xdead, line + len + 2, - self->sym_priv_size, 0, verbose); + self->sym_priv_size, 0, v); if (sym == NULL) goto out_delete_line; @@ -239,7 +241,7 @@ out_failure: return -1; } -static int dso__load_perf_map(struct dso *self, symbol_filter_t filter, int verbose) +static int dso__load_perf_map(struct dso *self, symbol_filter_t filter, int v) { char *line = NULL; size_t n; @@ -277,7 +279,7 @@ static int dso__load_perf_map(struct dso *self, symbol_filter_t filter, int verb continue; sym = symbol__new(start, size, line + len, - self->sym_priv_size, start, verbose); + self->sym_priv_size, start, v); if (sym == NULL) goto out_delete_line; @@ -305,13 +307,13 @@ out_failure: * elf_symtab__for_each_symbol - iterate thru all the symbols * * @self: struct elf_symtab instance to iterate - * @index: uint32_t index + * @idx: uint32_t idx * @sym: GElf_Sym iterator */ -#define elf_symtab__for_each_symbol(syms, nr_syms, index, sym) \ - for (index = 0, gelf_getsym(syms, index, &sym);\ - index < nr_syms; \ - index++, gelf_getsym(syms, index, &sym)) +#define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \ + for (idx = 0, gelf_getsym(syms, idx, &sym);\ + idx < nr_syms; \ + idx++, gelf_getsym(syms, idx, &sym)) static inline uint8_t elf_sym__type(const GElf_Sym *sym) { @@ -354,7 +356,7 @@ static inline const char *elf_sym__name(const GElf_Sym *sym, static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, GElf_Shdr *shp, const char *name, - size_t *index) + size_t *idx) { Elf_Scn *sec = NULL; size_t cnt = 1; @@ -365,8 +367,8 @@ static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, gelf_getshdr(sec, shp); str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); if (!strcmp(name, str)) { - if (index) - *index = cnt; + if (idx) + *idx = cnt; break; } ++cnt; @@ -392,7 +394,7 @@ static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, * And always look at the original dso, not at debuginfo packages, that * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS). */ -static int dso__synthesize_plt_symbols(struct dso *self, int verbose) +static int dso__synthesize_plt_symbols(struct dso *self, int v) { uint32_t nr_rel_entries, idx; GElf_Sym sym; @@ -442,7 +444,7 @@ static int dso__synthesize_plt_symbols(struct dso *self, int verbose) goto out_elf_end; /* - * Fetch the relocation section to find the indexes to the GOT + * Fetch the relocation section to find the idxes to the GOT * and the symbols in the .dynsym they refer to. */ reldata = elf_getdata(scn_plt_rel, NULL); @@ -476,7 +478,7 @@ static int dso__synthesize_plt_symbols(struct dso *self, int verbose) "%s@plt", elf_sym__name(&sym, symstrs)); f = symbol__new(plt_offset, shdr_plt.sh_entsize, - sympltname, self->sym_priv_size, 0, verbose); + sympltname, self->sym_priv_size, 0, v); if (!f) goto out_elf_end; @@ -494,7 +496,7 @@ static int dso__synthesize_plt_symbols(struct dso *self, int verbose) "%s@plt", elf_sym__name(&sym, symstrs)); f = symbol__new(plt_offset, shdr_plt.sh_entsize, - sympltname, self->sym_priv_size, 0, verbose); + sympltname, self->sym_priv_size, 0, v); if (!f) goto out_elf_end; @@ -518,12 +520,12 @@ out: } static int dso__load_sym(struct dso *self, int fd, const char *name, - symbol_filter_t filter, int verbose, struct module *mod) + symbol_filter_t filter, int v, struct module *mod) { Elf_Data *symstrs, *secstrs; uint32_t nr_syms; int err = -1; - uint32_t index; + uint32_t idx; GElf_Ehdr ehdr; GElf_Shdr shdr; Elf_Data *syms; @@ -534,14 +536,14 @@ static int dso__load_sym(struct dso *self, int fd, const char *name, elf = elf_begin(fd, ELF_C_READ_MMAP, NULL); if (elf == NULL) { - if (verbose) + if (v) fprintf(stderr, "%s: cannot read %s ELF file.\n", __func__, name); goto out_close; } if (gelf_getehdr(elf, &ehdr) == NULL) { - if (verbose) + if (v) fprintf(stderr, "%s: cannot get elf header.\n", __func__); goto out_elf_end; } @@ -583,9 +585,9 @@ static int dso__load_sym(struct dso *self, int fd, const char *name, NULL) != NULL); } else self->adjust_symbols = 0; - elf_symtab__for_each_symbol(syms, nr_syms, index, sym) { + elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) { struct symbol *f; - const char *name; + const char *elf_name; char *demangled; u64 obj_start; struct section *section = NULL; @@ -608,7 +610,7 @@ static int dso__load_sym(struct dso *self, int fd, const char *name, obj_start = sym.st_value; if (self->adjust_symbols) { - if (verbose >= 2) + if (v >= 2) printf("adjusting symbol: st_value: %Lx sh_addr: %Lx sh_offset: %Lx\n", (u64)sym.st_value, (u64)shdr.sh_addr, (u64)shdr.sh_offset); @@ -630,13 +632,13 @@ static int dso__load_sym(struct dso *self, int fd, const char *name, * DWARF DW_compile_unit has this, but we don't always have access * to it... */ - name = elf_sym__name(&sym, symstrs); - demangled = bfd_demangle(NULL, name, DMGL_PARAMS | DMGL_ANSI); + elf_name = elf_sym__name(&sym, symstrs); + demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); if (demangled != NULL) - name = demangled; + elf_name = demangled; - f = symbol__new(sym.st_value, sym.st_size, name, - self->sym_priv_size, obj_start, verbose); + f = symbol__new(sym.st_value, sym.st_size, elf_name, + self->sym_priv_size, obj_start, v); free(demangled); if (!f) goto out_elf_end; @@ -659,7 +661,7 @@ out_close: #define BUILD_ID_SIZE 128 -static char *dso__read_build_id(struct dso *self, int verbose) +static char *dso__read_build_id(struct dso *self, int v) { int i; GElf_Ehdr ehdr; @@ -676,14 +678,14 @@ static char *dso__read_build_id(struct dso *self, int verbose) elf = elf_begin(fd, ELF_C_READ_MMAP, NULL); if (elf == NULL) { - if (verbose) + if (v) fprintf(stderr, "%s: cannot read %s ELF file.\n", __func__, self->name); goto out_close; } if (gelf_getehdr(elf, &ehdr) == NULL) { - if (verbose) + if (v) fprintf(stderr, "%s: cannot get elf header.\n", __func__); goto out_elf_end; } @@ -706,7 +708,7 @@ static char *dso__read_build_id(struct dso *self, int verbose) ++raw; bid += 2; } - if (verbose >= 2) + if (v >= 2) printf("%s(%s): %s\n", __func__, self->name, build_id); out_elf_end: elf_end(elf); @@ -732,7 +734,7 @@ char dso__symtab_origin(const struct dso *self) return origin[self->origin]; } -int dso__load(struct dso *self, symbol_filter_t filter, int verbose) +int dso__load(struct dso *self, symbol_filter_t filter, int v) { int size = PATH_MAX; char *name = malloc(size), *build_id = NULL; @@ -745,7 +747,7 @@ int dso__load(struct dso *self, symbol_filter_t filter, int verbose) self->adjust_symbols = 0; if (strncmp(self->name, "/tmp/perf-", 10) == 0) { - ret = dso__load_perf_map(self, filter, verbose); + ret = dso__load_perf_map(self, filter, v); self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT : DSO__ORIG_NOT_FOUND; return ret; @@ -764,7 +766,7 @@ more: snprintf(name, size, "/usr/lib/debug%s", self->name); break; case DSO__ORIG_BUILDID: - build_id = dso__read_build_id(self, verbose); + build_id = dso__read_build_id(self, v); if (build_id != NULL) { snprintf(name, size, "/usr/lib/debug/.build-id/%.2s/%s.debug", @@ -785,7 +787,7 @@ more: fd = open(name, O_RDONLY); } while (fd < 0); - ret = dso__load_sym(self, fd, name, filter, verbose, NULL); + ret = dso__load_sym(self, fd, name, filter, v, NULL); close(fd); /* @@ -795,7 +797,7 @@ more: goto more; if (ret > 0) { - int nr_plt = dso__synthesize_plt_symbols(self, verbose); + int nr_plt = dso__synthesize_plt_symbols(self, v); if (nr_plt > 0) ret += nr_plt; } @@ -807,7 +809,7 @@ out: } static int dso__load_module(struct dso *self, struct mod_dso *mods, const char *name, - symbol_filter_t filter, int verbose) + symbol_filter_t filter, int v) { struct module *mod = mod_dso__find_module(mods, name); int err = 0, fd; @@ -820,13 +822,13 @@ static int dso__load_module(struct dso *self, struct mod_dso *mods, const char * if (fd < 0) return err; - err = dso__load_sym(self, fd, name, filter, verbose, mod); + err = dso__load_sym(self, fd, name, filter, v, mod); close(fd); return err; } -int dso__load_modules(struct dso *self, symbol_filter_t filter, int verbose) +int dso__load_modules(struct dso *self, symbol_filter_t filter, int v) { struct mod_dso *mods = mod_dso__new_dso("modules"); struct module *pos; @@ -844,7 +846,7 @@ int dso__load_modules(struct dso *self, symbol_filter_t filter, int verbose) next = rb_first(&mods->mods); while (next) { pos = rb_entry(next, struct module, rb_node); - err = dso__load_module(self, mods, pos->name, filter, verbose); + err = dso__load_module(self, mods, pos->name, filter, v); if (err < 0) break; @@ -887,14 +889,14 @@ static inline void dso__fill_symbol_holes(struct dso *self) } static int dso__load_vmlinux(struct dso *self, const char *vmlinux, - symbol_filter_t filter, int verbose) + symbol_filter_t filter, int v) { int err, fd = open(vmlinux, O_RDONLY); if (fd < 0) return -1; - err = dso__load_sym(self, fd, vmlinux, filter, verbose, NULL); + err = dso__load_sym(self, fd, vmlinux, filter, v, NULL); if (err > 0) dso__fill_symbol_holes(self); @@ -905,18 +907,18 @@ static int dso__load_vmlinux(struct dso *self, const char *vmlinux, } int dso__load_kernel(struct dso *self, const char *vmlinux, - symbol_filter_t filter, int verbose, int modules) + symbol_filter_t filter, int v, int use_modules) { int err = -1; if (vmlinux) { - err = dso__load_vmlinux(self, vmlinux, filter, verbose); - if (err > 0 && modules) - err = dso__load_modules(self, filter, verbose); + err = dso__load_vmlinux(self, vmlinux, filter, v); + if (err > 0 && use_modules) + err = dso__load_modules(self, filter, v); } if (err <= 0) - err = dso__load_kallsyms(self, filter, verbose); + err = dso__load_kallsyms(self, filter, v); if (err > 0) self->origin = DSO__ORIG_KERNEL; @@ -924,6 +926,103 @@ int dso__load_kernel(struct dso *self, const char *vmlinux, return err; } +LIST_HEAD(dsos); +struct dso *kernel_dso; +struct dso *vdso; +struct dso *hypervisor_dso; + +const char *vmlinux_name = "vmlinux"; +int modules; + +static void dsos__add(struct dso *dso) +{ + list_add_tail(&dso->node, &dsos); +} + +static struct dso *dsos__find(const char *name) +{ + struct dso *pos; + + list_for_each_entry(pos, &dsos, node) + if (strcmp(pos->name, name) == 0) + return pos; + return NULL; +} + +struct dso *dsos__findnew(const char *name) +{ + struct dso *dso = dsos__find(name); + int nr; + + if (dso) + return dso; + + dso = dso__new(name, 0); + if (!dso) + goto out_delete_dso; + + nr = dso__load(dso, NULL, verbose); + if (nr < 0) { + eprintf("Failed to open: %s\n", name); + goto out_delete_dso; + } + if (!nr) + eprintf("No symbols found in: %s, maybe install a debug package?\n", name); + + dsos__add(dso); + + return dso; + +out_delete_dso: + dso__delete(dso); + return NULL; +} + +void dsos__fprintf(FILE *fp) +{ + struct dso *pos; + + list_for_each_entry(pos, &dsos, node) + dso__fprintf(pos, fp); +} + +static struct symbol *vdso__find_symbol(struct dso *dso, u64 ip) +{ + return dso__find_symbol(dso, ip); +} + +int load_kernel(void) +{ + int err; + + kernel_dso = dso__new("[kernel]", 0); + if (!kernel_dso) + return -1; + + err = dso__load_kernel(kernel_dso, vmlinux_name, NULL, verbose, modules); + if (err <= 0) { + dso__delete(kernel_dso); + kernel_dso = NULL; + } else + dsos__add(kernel_dso); + + vdso = dso__new("[vdso]", 0); + if (!vdso) + return -1; + + vdso->find_symbol = vdso__find_symbol; + + dsos__add(vdso); + + hypervisor_dso = dso__new("[hypervisor]", 0); + if (!hypervisor_dso) + return -1; + dsos__add(hypervisor_dso); + + return err; +} + + void symbol__init(void) { elf_version(EV_CURRENT); |