diff options
Diffstat (limited to 'tools/perf/util/symbol.c')
-rw-r--r-- | tools/perf/util/symbol.c | 1356 |
1 files changed, 1049 insertions, 307 deletions
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 226f44a2357d..d3d9fed74f1d 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -2,14 +2,20 @@ #include "../perf.h" #include "string.h" #include "symbol.h" +#include "thread.h" #include "debug.h" +#include <asm/bug.h> #include <libelf.h> #include <gelf.h> #include <elf.h> +#include <limits.h> +#include <sys/utsname.h> -const char *sym_hist_filter; +#ifndef NT_GNU_BUILD_ID +#define NT_GNU_BUILD_ID 3 +#endif enum dso_origin { DSO__ORIG_KERNEL = 0, @@ -18,94 +24,209 @@ enum dso_origin { DSO__ORIG_UBUNTU, DSO__ORIG_BUILDID, DSO__ORIG_DSO, + DSO__ORIG_KMODULE, DSO__ORIG_NOT_FOUND, }; -static struct symbol *symbol__new(u64 start, u64 len, - const char *name, unsigned int priv_size, - u64 obj_start, int v) +static void dsos__add(struct list_head *head, struct dso *dso); +static struct map *map__new2(u64 start, struct dso *dso, enum map_type type); +static int dso__load_kernel_sym(struct dso *self, struct map *map, + struct map_groups *mg, symbol_filter_t filter); +unsigned int symbol__priv_size; +static int vmlinux_path__nr_entries; +static char **vmlinux_path; + +static struct symbol_conf symbol_conf__defaults = { + .use_modules = true, + .try_vmlinux_path = true, +}; + +static struct map_groups kmaps_mem; +struct map_groups *kmaps = &kmaps_mem; + +bool dso__loaded(const struct dso *self, enum map_type type) { - size_t namelen = strlen(name) + 1; - struct symbol *self = calloc(1, priv_size + sizeof(*self) + namelen); + return self->loaded & (1 << type); +} - if (!self) - return NULL; +bool dso__sorted_by_name(const struct dso *self, enum map_type type) +{ + return self->sorted_by_name & (1 << type); +} - 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); +static void dso__set_loaded(struct dso *self, enum map_type type) +{ + self->loaded |= (1 << type); +} - self->obj_start= obj_start; - self->hist = NULL; - self->hist_sum = 0; +static void dso__set_sorted_by_name(struct dso *self, enum map_type type) +{ + self->sorted_by_name |= (1 << type); +} - if (sym_hist_filter && !strcmp(name, sym_hist_filter)) - self->hist = calloc(sizeof(u64), len); +static bool symbol_type__is_a(char symbol_type, enum map_type map_type) +{ + switch (map_type) { + case MAP__FUNCTION: + return symbol_type == 'T' || symbol_type == 'W'; + case MAP__VARIABLE: + return symbol_type == 'D' || symbol_type == 'd'; + default: + return false; + } +} + +static void symbols__fixup_end(struct rb_root *self) +{ + struct rb_node *nd, *prevnd = rb_first(self); + struct symbol *curr, *prev; - if (priv_size) { - memset(self, 0, priv_size); - self = ((void *)self) + priv_size; + if (prevnd == NULL) + return; + + curr = rb_entry(prevnd, struct symbol, rb_node); + + for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { + prev = curr; + curr = rb_entry(nd, struct symbol, rb_node); + + if (prev->end == prev->start) + prev->end = curr->start - 1; } + + /* Last entry */ + if (curr->end == curr->start) + curr->end = roundup(curr->start, 4096); +} + +static void __map_groups__fixup_end(struct map_groups *self, enum map_type type) +{ + struct map *prev, *curr; + struct rb_node *nd, *prevnd = rb_first(&self->maps[type]); + + if (prevnd == NULL) + return; + + curr = rb_entry(prevnd, struct map, rb_node); + + for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { + prev = curr; + curr = rb_entry(nd, struct map, rb_node); + prev->end = curr->start - 1; + } + + /* + * We still haven't the actual symbols, so guess the + * last map final address. + */ + curr->end = ~0UL; +} + +static void map_groups__fixup_end(struct map_groups *self) +{ + int i; + for (i = 0; i < MAP__NR_TYPES; ++i) + __map_groups__fixup_end(self, i); +} + +static struct symbol *symbol__new(u64 start, u64 len, const char *name) +{ + size_t namelen = strlen(name) + 1; + struct symbol *self = zalloc(symbol__priv_size + + sizeof(*self) + namelen); + if (self == NULL) + return NULL; + + if (symbol__priv_size) + self = ((void *)self) + symbol__priv_size; + self->start = start; self->end = len ? start + len - 1 : start; + + pr_debug3("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end); + memcpy(self->name, name, namelen); return self; } -static void symbol__delete(struct symbol *self, unsigned int priv_size) +static void symbol__delete(struct symbol *self) { - free(((void *)self) - priv_size); + free(((void *)self) - symbol__priv_size); } static size_t symbol__fprintf(struct symbol *self, FILE *fp) { - if (!self->module) - return fprintf(fp, " %llx-%llx %s\n", + return fprintf(fp, " %llx-%llx %s\n", self->start, self->end, self->name); - else - return fprintf(fp, " %llx-%llx %s \t[%s]\n", - self->start, self->end, self->name, self->module->name); } -struct dso *dso__new(const char *name, unsigned int sym_priv_size) +static void dso__set_long_name(struct dso *self, char *name) +{ + if (name == NULL) + return; + self->long_name = name; + self->long_name_len = strlen(name); +} + +static void dso__set_basename(struct dso *self) +{ + self->short_name = basename(self->long_name); +} + +struct dso *dso__new(const char *name) { struct dso *self = malloc(sizeof(*self) + strlen(name) + 1); if (self != NULL) { + int i; strcpy(self->name, name); - self->syms = RB_ROOT; - self->sym_priv_size = sym_priv_size; - self->find_symbol = dso__find_symbol; + dso__set_long_name(self, self->name); + self->short_name = self->name; + for (i = 0; i < MAP__NR_TYPES; ++i) + self->symbols[i] = self->symbol_names[i] = RB_ROOT; self->slen_calculated = 0; self->origin = DSO__ORIG_NOT_FOUND; + self->loaded = 0; + self->sorted_by_name = 0; + self->has_build_id = 0; } return self; } -static void dso__delete_symbols(struct dso *self) +static void symbols__delete(struct rb_root *self) { struct symbol *pos; - struct rb_node *next = rb_first(&self->syms); + struct rb_node *next = rb_first(self); while (next) { pos = rb_entry(next, struct symbol, rb_node); next = rb_next(&pos->rb_node); - rb_erase(&pos->rb_node, &self->syms); - symbol__delete(pos, self->sym_priv_size); + rb_erase(&pos->rb_node, self); + symbol__delete(pos); } } void dso__delete(struct dso *self) { - dso__delete_symbols(self); + int i; + for (i = 0; i < MAP__NR_TYPES; ++i) + symbols__delete(&self->symbols[i]); + if (self->long_name != self->name) + free(self->long_name); free(self); } -static void dso__insert_symbol(struct dso *self, struct symbol *sym) +void dso__set_build_id(struct dso *self, void *build_id) +{ + memcpy(self->build_id, build_id, sizeof(self->build_id)); + self->has_build_id = 1; +} + +static void symbols__insert(struct rb_root *self, struct symbol *sym) { - struct rb_node **p = &self->syms.rb_node; + struct rb_node **p = &self->rb_node; struct rb_node *parent = NULL; const u64 ip = sym->start; struct symbol *s; @@ -119,17 +240,17 @@ static void dso__insert_symbol(struct dso *self, struct symbol *sym) p = &(*p)->rb_right; } rb_link_node(&sym->rb_node, parent, p); - rb_insert_color(&sym->rb_node, &self->syms); + rb_insert_color(&sym->rb_node, self); } -struct symbol *dso__find_symbol(struct dso *self, u64 ip) +static struct symbol *symbols__find(struct rb_root *self, u64 ip) { struct rb_node *n; if (self == NULL) return NULL; - n = self->syms.rb_node; + n = self->rb_node; while (n) { struct symbol *s = rb_entry(n, struct symbol, rb_node); @@ -145,12 +266,116 @@ struct symbol *dso__find_symbol(struct dso *self, u64 ip) return NULL; } -size_t dso__fprintf(struct dso *self, FILE *fp) +struct symbol_name_rb_node { + struct rb_node rb_node; + struct symbol sym; +}; + +static void symbols__insert_by_name(struct rb_root *self, struct symbol *sym) { - size_t ret = fprintf(fp, "dso: %s\n", self->name); + struct rb_node **p = &self->rb_node; + struct rb_node *parent = NULL; + struct symbol_name_rb_node *symn = ((void *)sym) - sizeof(*parent), *s; + + while (*p != NULL) { + parent = *p; + s = rb_entry(parent, struct symbol_name_rb_node, rb_node); + if (strcmp(sym->name, s->sym.name) < 0) + p = &(*p)->rb_left; + else + p = &(*p)->rb_right; + } + rb_link_node(&symn->rb_node, parent, p); + rb_insert_color(&symn->rb_node, self); +} +static void symbols__sort_by_name(struct rb_root *self, struct rb_root *source) +{ struct rb_node *nd; - for (nd = rb_first(&self->syms); nd; nd = rb_next(nd)) { + + for (nd = rb_first(source); nd; nd = rb_next(nd)) { + struct symbol *pos = rb_entry(nd, struct symbol, rb_node); + symbols__insert_by_name(self, pos); + } +} + +static struct symbol *symbols__find_by_name(struct rb_root *self, const char *name) +{ + struct rb_node *n; + + if (self == NULL) + return NULL; + + n = self->rb_node; + + while (n) { + struct symbol_name_rb_node *s; + int cmp; + + s = rb_entry(n, struct symbol_name_rb_node, rb_node); + cmp = strcmp(name, s->sym.name); + + if (cmp < 0) + n = n->rb_left; + else if (cmp > 0) + n = n->rb_right; + else + return &s->sym; + } + + return NULL; +} + +struct symbol *dso__find_symbol(struct dso *self, + enum map_type type, u64 addr) +{ + return symbols__find(&self->symbols[type], addr); +} + +struct symbol *dso__find_symbol_by_name(struct dso *self, enum map_type type, + const char *name) +{ + return symbols__find_by_name(&self->symbol_names[type], name); +} + +void dso__sort_by_name(struct dso *self, enum map_type type) +{ + dso__set_sorted_by_name(self, type); + return symbols__sort_by_name(&self->symbol_names[type], + &self->symbols[type]); +} + +int build_id__sprintf(u8 *self, int len, char *bf) +{ + char *bid = bf; + u8 *raw = self; + int i; + + for (i = 0; i < len; ++i) { + sprintf(bid, "%02x", *raw); + ++raw; + bid += 2; + } + + return raw - self; +} + +size_t dso__fprintf_buildid(struct dso *self, FILE *fp) +{ + char sbuild_id[BUILD_ID_SIZE * 2 + 1]; + + build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id); + return fprintf(fp, "%s", sbuild_id); +} + +size_t dso__fprintf(struct dso *self, enum map_type type, FILE *fp) +{ + struct rb_node *nd; + size_t ret = fprintf(fp, "dso: %s (", self->short_name); + + ret += dso__fprintf_buildid(self, fp); + ret += fprintf(fp, ")\n"); + for (nd = rb_first(&self->symbols[type]); nd; nd = rb_next(nd)) { struct symbol *pos = rb_entry(nd, struct symbol, rb_node); ret += symbol__fprintf(pos, fp); } @@ -158,13 +383,17 @@ size_t dso__fprintf(struct dso *self, FILE *fp) return ret; } -static int dso__load_kallsyms(struct dso *self, symbol_filter_t filter, int v) +/* + * Loads the function entries in /proc/kallsyms into kernel_map->dso, + * so that we can in the next step set the symbol ->end address and then + * call kernel_maps__split_kallsyms. + */ +static int dso__load_all_kallsyms(struct dso *self, struct map *map) { - struct rb_node *nd, *prevnd; char *line = NULL; size_t n; + struct rb_root *root = &self->symbols[map->type]; FILE *file = fopen("/proc/kallsyms", "r"); - int count = 0; if (file == NULL) goto out_failure; @@ -174,6 +403,7 @@ static int dso__load_kallsyms(struct dso *self, symbol_filter_t filter, int v) struct symbol *sym; int line_len, len; char symbol_type; + char *symbol_name; line_len = getline(&line, &n, file); if (line_len < 0) @@ -191,49 +421,28 @@ static int dso__load_kallsyms(struct dso *self, symbol_filter_t filter, int v) continue; symbol_type = toupper(line[len]); - /* - * We're interested only in code ('T'ext) - */ - if (symbol_type != 'T' && symbol_type != 'W') + if (!symbol_type__is_a(symbol_type, map->type)) continue; + + symbol_name = line + len + 2; /* - * Well fix up the end later, when we have all sorted. + * Will fix up the end later, when we have all symbols sorted. */ - sym = symbol__new(start, 0xdead, line + len + 2, - self->sym_priv_size, 0, v); + sym = symbol__new(start, 0, symbol_name); if (sym == NULL) goto out_delete_line; - - if (filter && filter(self, sym)) - symbol__delete(sym, self->sym_priv_size); - else { - dso__insert_symbol(self, sym); - count++; - } - } - - /* - * Now that we have all sorted out, just set the ->end of all - * symbols - */ - prevnd = rb_first(&self->syms); - - if (prevnd == NULL) - goto out_delete_line; - - for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { - struct symbol *prev = rb_entry(prevnd, struct symbol, rb_node), - *curr = rb_entry(nd, struct symbol, rb_node); - - prev->end = curr->start - 1; - prevnd = nd; + /* + * We will pass the symbols to the filter later, in + * map__split_kallsyms, when we have split the maps per module + */ + symbols__insert(root, sym); } free(line); fclose(file); - return count; + return 0; out_delete_line: free(line); @@ -241,14 +450,114 @@ out_failure: return -1; } -static int dso__load_perf_map(struct dso *self, symbol_filter_t filter, int v) +/* + * Split the symbols into maps, making sure there are no overlaps, i.e. the + * kernel range is broken in several maps, named [kernel].N, as we don't have + * the original ELF section names vmlinux have. + */ +static int dso__split_kallsyms(struct dso *self, struct map *map, + struct map_groups *mg, symbol_filter_t filter) +{ + struct map *curr_map = map; + struct symbol *pos; + int count = 0; + struct rb_root *root = &self->symbols[map->type]; + struct rb_node *next = rb_first(root); + int kernel_range = 0; + + while (next) { + char *module; + + pos = rb_entry(next, struct symbol, rb_node); + next = rb_next(&pos->rb_node); + + module = strchr(pos->name, '\t'); + if (module) { + if (!mg->use_modules) + goto discard_symbol; + + *module++ = '\0'; + + if (strcmp(self->name, module)) { + curr_map = map_groups__find_by_name(mg, map->type, module); + if (curr_map == NULL) { + pr_debug("/proc/{kallsyms,modules} " + "inconsistency!\n"); + return -1; + } + } + /* + * So that we look just like we get from .ko files, + * i.e. not prelinked, relative to map->start. + */ + pos->start = curr_map->map_ip(curr_map, pos->start); + pos->end = curr_map->map_ip(curr_map, pos->end); + } else if (curr_map != map) { + char dso_name[PATH_MAX]; + struct dso *dso; + + snprintf(dso_name, sizeof(dso_name), "[kernel].%d", + kernel_range++); + + dso = dso__new(dso_name); + if (dso == NULL) + return -1; + + curr_map = map__new2(pos->start, dso, map->type); + if (map == NULL) { + dso__delete(dso); + return -1; + } + + curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; + map_groups__insert(mg, curr_map); + ++kernel_range; + } + + if (filter && filter(curr_map, pos)) { +discard_symbol: rb_erase(&pos->rb_node, root); + symbol__delete(pos); + } else { + if (curr_map != map) { + rb_erase(&pos->rb_node, root); + symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); + } + count++; + } + } + + return count; +} + + +static int dso__load_kallsyms(struct dso *self, struct map *map, + struct map_groups *mg, symbol_filter_t filter) +{ + if (dso__load_all_kallsyms(self, map) < 0) + return -1; + + symbols__fixup_end(&self->symbols[map->type]); + self->origin = DSO__ORIG_KERNEL; + + return dso__split_kallsyms(self, map, mg, filter); +} + +size_t kernel_maps__fprintf(FILE *fp) +{ + size_t printed = fprintf(fp, "Kernel maps:\n"); + printed += map_groups__fprintf_maps(kmaps, fp); + return printed + fprintf(fp, "END kernel maps\n"); +} + +static int dso__load_perf_map(struct dso *self, struct map *map, + symbol_filter_t filter) { char *line = NULL; size_t n; FILE *file; int nr_syms = 0; - file = fopen(self->name, "r"); + file = fopen(self->long_name, "r"); if (file == NULL) goto out_failure; @@ -278,16 +587,15 @@ static int dso__load_perf_map(struct dso *self, symbol_filter_t filter, int v) if (len + 2 >= line_len) continue; - sym = symbol__new(start, size, line + len, - self->sym_priv_size, start, v); + sym = symbol__new(start, size, line + len); if (sym == NULL) goto out_delete_line; - if (filter && filter(self, sym)) - symbol__delete(sym, self->sym_priv_size); + if (filter && filter(map, sym)) + symbol__delete(sym); else { - dso__insert_symbol(self, sym); + symbols__insert(&self->symbols[map->type], sym); nr_syms++; } } @@ -327,6 +635,13 @@ static inline int elf_sym__is_function(const GElf_Sym *sym) sym->st_shndx != SHN_UNDEF; } +static inline bool elf_sym__is_object(const GElf_Sym *sym) +{ + return elf_sym__type(sym) == STT_OBJECT && + sym->st_name != 0 && + sym->st_shndx != SHN_UNDEF; +} + static inline int elf_sym__is_label(const GElf_Sym *sym) { return elf_sym__type(sym) == STT_NOTYPE && @@ -347,6 +662,12 @@ static inline int elf_sec__is_text(const GElf_Shdr *shdr, return strstr(elf_sec__name(shdr, secstrs), "text") != NULL; } +static inline bool elf_sec__is_data(const GElf_Shdr *shdr, + const Elf_Data *secstrs) +{ + return strstr(elf_sec__name(shdr, secstrs), "data") != NULL; +} + static inline const char *elf_sym__name(const GElf_Sym *sym, const Elf_Data *symstrs) { @@ -393,7 +714,8 @@ 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 v) +static int dso__synthesize_plt_symbols(struct dso *self, struct map *map, + symbol_filter_t filter) { uint32_t nr_rel_entries, idx; GElf_Sym sym; @@ -409,7 +731,7 @@ static int dso__synthesize_plt_symbols(struct dso *self, int v) Elf *elf; int nr = 0, symidx, fd, err = 0; - fd = open(self->name, O_RDONLY); + fd = open(self->long_name, O_RDONLY); if (fd < 0) goto out; @@ -477,12 +799,16 @@ static int dso__synthesize_plt_symbols(struct dso *self, int v) "%s@plt", elf_sym__name(&sym, symstrs)); f = symbol__new(plt_offset, shdr_plt.sh_entsize, - sympltname, self->sym_priv_size, 0, v); + sympltname); if (!f) goto out_elf_end; - dso__insert_symbol(self, f); - ++nr; + if (filter && filter(map, f)) + symbol__delete(f); + else { + symbols__insert(&self->symbols[map->type], f); + ++nr; + } } } else if (shdr_rel_plt.sh_type == SHT_REL) { GElf_Rel pos_mem, *pos; @@ -495,12 +821,16 @@ static int dso__synthesize_plt_symbols(struct dso *self, int v) "%s@plt", elf_sym__name(&sym, symstrs)); f = symbol__new(plt_offset, shdr_plt.sh_entsize, - sympltname, self->sym_priv_size, 0, v); + sympltname); if (!f) goto out_elf_end; - dso__insert_symbol(self, f); - ++nr; + if (filter && filter(map, f)) + symbol__delete(f); + else { + symbols__insert(&self->symbols[map->type], f); + ++nr; + } } } @@ -513,14 +843,42 @@ out_close: if (err == 0) return nr; out: - fprintf(stderr, "%s: problems reading %s PLT info.\n", - __func__, self->name); + pr_warning("%s: problems reading %s PLT info.\n", + __func__, self->long_name); return 0; } -static int dso__load_sym(struct dso *self, int fd, const char *name, - symbol_filter_t filter, int v, struct module *mod) +static bool elf_sym__is_a(GElf_Sym *self, enum map_type type) +{ + switch (type) { + case MAP__FUNCTION: + return elf_sym__is_function(self); + case MAP__VARIABLE: + return elf_sym__is_object(self); + default: + return false; + } +} + +static bool elf_sec__is_a(GElf_Shdr *self, Elf_Data *secstrs, enum map_type type) { + switch (type) { + case MAP__FUNCTION: + return elf_sec__is_text(self, secstrs); + case MAP__VARIABLE: + return elf_sec__is_data(self, secstrs); + default: + return false; + } +} + +static int dso__load_sym(struct dso *self, struct map *map, + struct map_groups *mg, const char *name, int fd, + symbol_filter_t filter, int kernel, int kmodule) +{ + struct map *curr_map = map; + struct dso *curr_dso = self; + size_t dso_name_len = strlen(self->short_name); Elf_Data *symstrs, *secstrs; uint32_t nr_syms; int err = -1; @@ -531,19 +889,16 @@ static int dso__load_sym(struct dso *self, int fd, const char *name, GElf_Sym sym; Elf_Scn *sec, *sec_strndx; Elf *elf; - int nr = 0, kernel = !strcmp("[kernel]", self->name); + int nr = 0; elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); if (elf == NULL) { - if (v) - fprintf(stderr, "%s: cannot read %s ELF file.\n", - __func__, name); + pr_err("%s: cannot read %s ELF file.\n", __func__, name); goto out_close; } if (gelf_getehdr(elf, &ehdr) == NULL) { - if (v) - fprintf(stderr, "%s: cannot get elf header.\n", __func__); + pr_err("%s: cannot get elf header.\n", __func__); goto out_elf_end; } @@ -587,13 +942,11 @@ static int dso__load_sym(struct dso *self, int fd, const char *name, elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) { struct symbol *f; const char *elf_name; - char *demangled; - u64 obj_start; - struct section *section = NULL; + char *demangled = NULL; int is_label = elf_sym__is_label(&sym); const char *section_name; - if (!is_label && !elf_sym__is_function(&sym)) + if (!is_label && !elf_sym__is_a(&sym, map->type)) continue; sec = elf_getscn(elf, sym.st_shndx); @@ -602,55 +955,88 @@ static int dso__load_sym(struct dso *self, int fd, const char *name, gelf_getshdr(sec, &shdr); - if (is_label && !elf_sec__is_text(&shdr, secstrs)) + if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type)) continue; + elf_name = elf_sym__name(&sym, symstrs); section_name = elf_sec__name(&shdr, secstrs); - obj_start = sym.st_value; - if (self->adjust_symbols) { - 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); + if (kernel || kmodule) { + char dso_name[PATH_MAX]; - sym.st_value -= shdr.sh_addr - shdr.sh_offset; - } + if (strcmp(section_name, + curr_dso->short_name + dso_name_len) == 0) + goto new_symbol; - if (mod) { - section = mod->sections->find_section(mod->sections, section_name); - if (section) - sym.st_value += section->vma; - else { - fprintf(stderr, "dso__load_sym() module %s lookup of %s failed\n", - mod->name, section_name); - goto out_elf_end; + if (strcmp(section_name, ".text") == 0) { + curr_map = map; + curr_dso = self; + goto new_symbol; } + + snprintf(dso_name, sizeof(dso_name), + "%s%s", self->short_name, section_name); + + curr_map = map_groups__find_by_name(mg, map->type, dso_name); + if (curr_map == NULL) { + u64 start = sym.st_value; + + if (kmodule) + start += map->start + shdr.sh_offset; + + curr_dso = dso__new(dso_name); + if (curr_dso == NULL) + goto out_elf_end; + curr_map = map__new2(start, curr_dso, + MAP__FUNCTION); + if (curr_map == NULL) { + dso__delete(curr_dso); + goto out_elf_end; + } + curr_map->map_ip = identity__map_ip; + curr_map->unmap_ip = identity__map_ip; + curr_dso->origin = DSO__ORIG_KERNEL; + map_groups__insert(kmaps, curr_map); + dsos__add(&dsos__kernel, curr_dso); + } else + curr_dso = curr_map->dso; + + goto new_symbol; + } + + if (curr_dso->adjust_symbols) { + pr_debug2("adjusting symbol: st_value: %Lx sh_addr: " + "%Lx sh_offset: %Lx\n", (u64)sym.st_value, + (u64)shdr.sh_addr, (u64)shdr.sh_offset); + sym.st_value -= shdr.sh_addr - shdr.sh_offset; } /* * We need to figure out if the object was created from C++ sources * DWARF DW_compile_unit has this, but we don't always have access * to it... */ - elf_name = elf_sym__name(&sym, symstrs); demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); if (demangled != NULL) elf_name = demangled; - - f = symbol__new(sym.st_value, sym.st_size, elf_name, - self->sym_priv_size, obj_start, v); +new_symbol: + f = symbol__new(sym.st_value, sym.st_size, elf_name); free(demangled); if (!f) goto out_elf_end; - if (filter && filter(self, f)) - symbol__delete(f, self->sym_priv_size); + if (filter && filter(curr_map, f)) + symbol__delete(f); else { - f->module = mod; - dso__insert_symbol(self, f); + symbols__insert(&curr_dso->symbols[curr_map->type], f); nr++; } } + /* + * For misannotated, zeroed, ASM function sizes. + */ + if (nr > 0) + symbols__fixup_end(&self->symbols[map->type]); err = nr; out_elf_end: elf_end(elf); @@ -658,63 +1044,154 @@ out_close: return err; } -#define BUILD_ID_SIZE 128 +static bool dso__build_id_equal(const struct dso *self, u8 *build_id) +{ + return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0; +} -static char *dso__read_build_id(struct dso *self, int v) +static bool __dsos__read_build_ids(struct list_head *head) { - int i; + bool have_build_id = false; + struct dso *pos; + + list_for_each_entry(pos, head, node) + if (filename__read_build_id(pos->long_name, pos->build_id, + sizeof(pos->build_id)) > 0) { + have_build_id = true; + pos->has_build_id = true; + } + + return have_build_id; +} + +bool dsos__read_build_ids(void) +{ + bool kbuildids = __dsos__read_build_ids(&dsos__kernel), + ubuildids = __dsos__read_build_ids(&dsos__user); + return kbuildids || ubuildids; +} + +/* + * Align offset to 4 bytes as needed for note name and descriptor data. + */ +#define NOTE_ALIGN(n) (((n) + 3) & -4U) + +int filename__read_build_id(const char *filename, void *bf, size_t size) +{ + int fd, err = -1; GElf_Ehdr ehdr; GElf_Shdr shdr; - Elf_Data *build_id_data; + Elf_Data *data; Elf_Scn *sec; - char *build_id = NULL, *bid; - unsigned char *raw; + Elf_Kind ek; + void *ptr; Elf *elf; - int fd = open(self->name, O_RDONLY); + if (size < BUILD_ID_SIZE) + goto out; + + fd = open(filename, O_RDONLY); if (fd < 0) goto out; elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); if (elf == NULL) { - if (v) - fprintf(stderr, "%s: cannot read %s ELF file.\n", - __func__, self->name); + pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); goto out_close; } + ek = elf_kind(elf); + if (ek != ELF_K_ELF) + goto out_elf_end; + if (gelf_getehdr(elf, &ehdr) == NULL) { - if (v) - fprintf(stderr, "%s: cannot get elf header.\n", __func__); + pr_err("%s: cannot get elf header.\n", __func__); goto out_elf_end; } - sec = elf_section_by_name(elf, &ehdr, &shdr, ".note.gnu.build-id", NULL); - if (sec == NULL) - goto out_elf_end; + sec = elf_section_by_name(elf, &ehdr, &shdr, + ".note.gnu.build-id", NULL); + if (sec == NULL) { + sec = elf_section_by_name(elf, &ehdr, &shdr, + ".notes", NULL); + if (sec == NULL) + goto out_elf_end; + } - build_id_data = elf_getdata(sec, NULL); - if (build_id_data == NULL) + data = elf_getdata(sec, NULL); + if (data == NULL) goto out_elf_end; - build_id = malloc(BUILD_ID_SIZE); - if (build_id == NULL) - goto out_elf_end; - raw = build_id_data->d_buf + 16; - bid = build_id; - for (i = 0; i < 20; ++i) { - sprintf(bid, "%02x", *raw); - ++raw; - bid += 2; + ptr = data->d_buf; + while (ptr < (data->d_buf + data->d_size)) { + GElf_Nhdr *nhdr = ptr; + int namesz = NOTE_ALIGN(nhdr->n_namesz), + descsz = NOTE_ALIGN(nhdr->n_descsz); + const char *name; + + ptr += sizeof(*nhdr); + name = ptr; + ptr += namesz; + if (nhdr->n_type == NT_GNU_BUILD_ID && + nhdr->n_namesz == sizeof("GNU")) { + if (memcmp(name, "GNU", sizeof("GNU")) == 0) { + memcpy(bf, ptr, BUILD_ID_SIZE); + err = BUILD_ID_SIZE; + break; + } + } + ptr += descsz; } - if (v >= 2) - printf("%s(%s): %s\n", __func__, self->name, build_id); out_elf_end: elf_end(elf); out_close: close(fd); out: - return build_id; + return err; +} + +int sysfs__read_build_id(const char *filename, void *build_id, size_t size) +{ + int fd, err = -1; + + if (size < BUILD_ID_SIZE) + goto out; + + fd = open(filename, O_RDONLY); + if (fd < 0) + goto out; + + while (1) { + char bf[BUFSIZ]; + GElf_Nhdr nhdr; + int namesz, descsz; + + if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr)) + break; + + namesz = NOTE_ALIGN(nhdr.n_namesz); + descsz = NOTE_ALIGN(nhdr.n_descsz); + if (nhdr.n_type == NT_GNU_BUILD_ID && + nhdr.n_namesz == sizeof("GNU")) { + if (read(fd, bf, namesz) != namesz) + break; + if (memcmp(bf, "GNU", sizeof("GNU")) == 0) { + if (read(fd, build_id, + BUILD_ID_SIZE) == BUILD_ID_SIZE) { + err = 0; + break; + } + } else if (read(fd, bf, descsz) != descsz) + break; + } else { + int n = namesz + descsz; + if (read(fd, bf, n) != n) + break; + } + } + close(fd); +out: + return err; } char dso__symtab_origin(const struct dso *self) @@ -726,6 +1203,7 @@ char dso__symtab_origin(const struct dso *self) [DSO__ORIG_UBUNTU] = 'u', [DSO__ORIG_BUILDID] = 'b', [DSO__ORIG_DSO] = 'd', + [DSO__ORIG_KMODULE] = 'K', }; if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND) @@ -733,20 +1211,27 @@ char dso__symtab_origin(const struct dso *self) return origin[self->origin]; } -int dso__load(struct dso *self, symbol_filter_t filter, int v) +int dso__load(struct dso *self, struct map *map, symbol_filter_t filter) { int size = PATH_MAX; - char *name = malloc(size), *build_id = NULL; + char *name; + u8 build_id[BUILD_ID_SIZE]; int ret = -1; int fd; + dso__set_loaded(self, map->type); + + if (self->kernel) + return dso__load_kernel_sym(self, map, kmaps, filter); + + name = malloc(size); if (!name) return -1; self->adjust_symbols = 0; if (strncmp(self->name, "/tmp/perf-", 10) == 0) { - ret = dso__load_perf_map(self, filter, v); + ret = dso__load_perf_map(self, map, filter); self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT : DSO__ORIG_NOT_FOUND; return ret; @@ -759,34 +1244,50 @@ more: self->origin++; switch (self->origin) { case DSO__ORIG_FEDORA: - snprintf(name, size, "/usr/lib/debug%s.debug", self->name); + snprintf(name, size, "/usr/lib/debug%s.debug", + self->long_name); break; case DSO__ORIG_UBUNTU: - snprintf(name, size, "/usr/lib/debug%s", self->name); + snprintf(name, size, "/usr/lib/debug%s", + self->long_name); break; case DSO__ORIG_BUILDID: - build_id = dso__read_build_id(self, v); - if (build_id != NULL) { + if (filename__read_build_id(self->long_name, build_id, + sizeof(build_id))) { + char build_id_hex[BUILD_ID_SIZE * 2 + 1]; + + build_id__sprintf(build_id, sizeof(build_id), + build_id_hex); snprintf(name, size, "/usr/lib/debug/.build-id/%.2s/%s.debug", - build_id, build_id + 2); - free(build_id); + build_id_hex, build_id_hex + 2); + if (self->has_build_id) + goto compare_build_id; break; } self->origin++; /* Fall thru */ case DSO__ORIG_DSO: - snprintf(name, size, "%s", self->name); + snprintf(name, size, "%s", self->long_name); break; default: goto out; } + if (self->has_build_id) { + if (filename__read_build_id(name, build_id, + sizeof(build_id)) < 0) + goto more; +compare_build_id: + if (!dso__build_id_equal(self, build_id)) + goto more; + } + fd = open(name, O_RDONLY); } while (fd < 0); - ret = dso__load_sym(self, fd, name, filter, v, NULL); + ret = dso__load_sym(self, map, NULL, name, fd, filter, 0, 0); close(fd); /* @@ -796,7 +1297,7 @@ more: goto more; if (ret > 0) { - int nr_plt = dso__synthesize_plt_symbols(self, v); + int nr_plt = dso__synthesize_plt_symbols(self, map, filter); if (nr_plt > 0) ret += nr_plt; } @@ -807,151 +1308,281 @@ out: return ret; } -static int dso__load_module(struct dso *self, struct mod_dso *mods, const char *name, - symbol_filter_t filter, int v) +struct map *map_groups__find_by_name(struct map_groups *self, + enum map_type type, const char *name) { - struct module *mod = mod_dso__find_module(mods, name); - int err = 0, fd; + struct rb_node *nd; + + for (nd = rb_first(&self->maps[type]); nd; nd = rb_next(nd)) { + struct map *map = rb_entry(nd, struct map, rb_node); - if (mod == NULL || !mod->active) - return err; + if (map->dso && strcmp(map->dso->name, name) == 0) + return map; + } - fd = open(mod->path, O_RDONLY); + return NULL; +} - if (fd < 0) - return err; +static int dsos__set_modules_path_dir(char *dirname) +{ + struct dirent *dent; + DIR *dir = opendir(dirname); - err = dso__load_sym(self, fd, name, filter, v, mod); - close(fd); + if (!dir) { + pr_debug("%s: cannot open %s dir\n", __func__, dirname); + return -1; + } - return err; + while ((dent = readdir(dir)) != NULL) { + char path[PATH_MAX]; + + if (dent->d_type == DT_DIR) { + if (!strcmp(dent->d_name, ".") || + !strcmp(dent->d_name, "..")) + continue; + + snprintf(path, sizeof(path), "%s/%s", + dirname, dent->d_name); + if (dsos__set_modules_path_dir(path) < 0) + goto failure; + } else { + char *dot = strrchr(dent->d_name, '.'), + dso_name[PATH_MAX]; + struct map *map; + char *long_name; + + if (dot == NULL || strcmp(dot, ".ko")) + continue; + snprintf(dso_name, sizeof(dso_name), "[%.*s]", + (int)(dot - dent->d_name), dent->d_name); + + strxfrchar(dso_name, '-', '_'); + map = map_groups__find_by_name(kmaps, MAP__FUNCTION, dso_name); + if (map == NULL) + continue; + + snprintf(path, sizeof(path), "%s/%s", + dirname, dent->d_name); + + long_name = strdup(path); + if (long_name == NULL) + goto failure; + dso__set_long_name(map->dso, long_name); + } + } + + return 0; +failure: + closedir(dir); + return -1; } -int dso__load_modules(struct dso *self, symbol_filter_t filter, int v) +static int dsos__set_modules_path(void) { - struct mod_dso *mods = mod_dso__new_dso("modules"); - struct module *pos; - struct rb_node *next; - int err, count = 0; + struct utsname uts; + char modules_path[PATH_MAX]; - err = mod_dso__load_modules(mods); + if (uname(&uts) < 0) + return -1; - if (err <= 0) - return err; + snprintf(modules_path, sizeof(modules_path), "/lib/modules/%s/kernel", + uts.release); - /* - * Iterate over modules, and load active symbols. - */ - next = rb_first(&mods->mods); - while (next) { - pos = rb_entry(next, struct module, rb_node); - err = dso__load_module(self, mods, pos->name, filter, v); - - if (err < 0) - break; + return dsos__set_modules_path_dir(modules_path); +} - next = rb_next(&pos->rb_node); - count += err; - } +/* + * Constructor variant for modules (where we know from /proc/modules where + * they are loaded) and for vmlinux, where only after we load all the + * symbols we'll know where it starts and ends. + */ +static struct map *map__new2(u64 start, struct dso *dso, enum map_type type) +{ + struct map *self = malloc(sizeof(*self)); - if (err < 0) { - mod_dso__delete_modules(mods); - mod_dso__delete_self(mods); - return err; + if (self != NULL) { + /* + * ->end will be filled after we load all the symbols + */ + map__init(self, type, start, 0, 0, dso); } - return count; + return self; } -static inline void dso__fill_symbol_holes(struct dso *self) +static int map_groups__create_module_maps(struct map_groups *self) { - struct symbol *prev = NULL; - struct rb_node *nd; + char *line = NULL; + size_t n; + FILE *file = fopen("/proc/modules", "r"); + struct map *map; - for (nd = rb_last(&self->syms); nd; nd = rb_prev(nd)) { - struct symbol *pos = rb_entry(nd, struct symbol, rb_node); + if (file == NULL) + return -1; + + while (!feof(file)) { + char name[PATH_MAX]; + u64 start; + struct dso *dso; + char *sep; + int line_len; - if (prev) { - u64 hole = 0; - int alias = pos->start == prev->start; + line_len = getline(&line, &n, file); + if (line_len < 0) + break; - if (!alias) - hole = prev->start - pos->end - 1; + if (!line) + goto out_failure; - if (hole || alias) { - if (alias) - pos->end = prev->end; - else if (hole) - pos->end = prev->start - 1; - } + line[--line_len] = '\0'; /* \n */ + + sep = strrchr(line, 'x'); + if (sep == NULL) + continue; + + hex2u64(sep + 1, &start); + + sep = strchr(line, ' '); + if (sep == NULL) + continue; + + *sep = '\0'; + + snprintf(name, sizeof(name), "[%s]", line); + dso = dso__new(name); + + if (dso == NULL) + goto out_delete_line; + + map = map__new2(start, dso, MAP__FUNCTION); + if (map == NULL) { + dso__delete(dso); + goto out_delete_line; } - prev = pos; + + snprintf(name, sizeof(name), + "/sys/module/%s/notes/.note.gnu.build-id", line); + if (sysfs__read_build_id(name, dso->build_id, + sizeof(dso->build_id)) == 0) + dso->has_build_id = true; + + dso->origin = DSO__ORIG_KMODULE; + map_groups__insert(self, map); + dsos__add(&dsos__kernel, dso); } + + free(line); + fclose(file); + + return dsos__set_modules_path(); + +out_delete_line: + free(line); +out_failure: + return -1; } -static int dso__load_vmlinux(struct dso *self, const char *vmlinux, - symbol_filter_t filter, int v) +static int dso__load_vmlinux(struct dso *self, struct map *map, + struct map_groups *mg, + const char *vmlinux, symbol_filter_t filter) { - int err, fd = open(vmlinux, O_RDONLY); + int err = -1, fd; - if (fd < 0) - return -1; + if (self->has_build_id) { + u8 build_id[BUILD_ID_SIZE]; - err = dso__load_sym(self, fd, vmlinux, filter, v, NULL); + if (filename__read_build_id(vmlinux, build_id, + sizeof(build_id)) < 0) { + pr_debug("No build_id in %s, ignoring it\n", vmlinux); + return -1; + } + if (!dso__build_id_equal(self, build_id)) { + char expected_build_id[BUILD_ID_SIZE * 2 + 1], + vmlinux_build_id[BUILD_ID_SIZE * 2 + 1]; + + build_id__sprintf(self->build_id, + sizeof(self->build_id), + expected_build_id); + build_id__sprintf(build_id, sizeof(build_id), + vmlinux_build_id); + pr_debug("build_id in %s is %s while expected is %s, " + "ignoring it\n", vmlinux, vmlinux_build_id, + expected_build_id); + return -1; + } + } - if (err > 0) - dso__fill_symbol_holes(self); + fd = open(vmlinux, O_RDONLY); + if (fd < 0) + return -1; + dso__set_loaded(self, map->type); + err = dso__load_sym(self, map, mg, self->long_name, fd, filter, 1, 0); close(fd); return err; } -int dso__load_kernel(struct dso *self, const char *vmlinux, - symbol_filter_t filter, int v, int use_modules) +static int dso__load_kernel_sym(struct dso *self, struct map *map, + struct map_groups *mg, symbol_filter_t filter) { - int err = -1; - - if (vmlinux) { - err = dso__load_vmlinux(self, vmlinux, filter, v); - if (err > 0 && use_modules) { - int syms = dso__load_modules(self, filter, v); - - if (syms < 0) { - fprintf(stderr, "dso__load_modules failed!\n"); - return syms; + int err; + bool is_kallsyms; + + if (vmlinux_path != NULL) { + int i; + pr_debug("Looking at the vmlinux_path (%d entries long)\n", + vmlinux_path__nr_entries); + for (i = 0; i < vmlinux_path__nr_entries; ++i) { + err = dso__load_vmlinux(self, map, mg, + vmlinux_path[i], filter); + if (err > 0) { + pr_debug("Using %s for symbols\n", + vmlinux_path[i]); + dso__set_long_name(self, + strdup(vmlinux_path[i])); + goto out_fixup; } - err += syms; } } - if (err <= 0) - err = dso__load_kallsyms(self, filter, v); + is_kallsyms = self->long_name[0] == '['; + if (is_kallsyms) + goto do_kallsyms; - if (err > 0) - self->origin = DSO__ORIG_KERNEL; + err = dso__load_vmlinux(self, map, mg, self->long_name, filter); + if (err <= 0) { + pr_info("The file %s cannot be used, " + "trying to use /proc/kallsyms...", self->long_name); +do_kallsyms: + err = dso__load_kallsyms(self, map, mg, filter); + if (err > 0 && !is_kallsyms) + dso__set_long_name(self, strdup("[kernel.kallsyms]")); + } + + if (err > 0) { +out_fixup: + map__fixup_start(map); + map__fixup_end(map); + } return err; } -LIST_HEAD(dsos); -struct dso *kernel_dso; -struct dso *vdso; -struct dso *hypervisor_dso; - -const char *vmlinux_name = "vmlinux"; -int modules; +LIST_HEAD(dsos__user); +LIST_HEAD(dsos__kernel); +struct dso *vdso; -static void dsos__add(struct dso *dso) +static void dsos__add(struct list_head *head, struct dso *dso) { - list_add_tail(&dso->node, &dsos); + list_add_tail(&dso->node, head); } -static struct dso *dsos__find(const char *name) +static struct dso *dsos__find(struct list_head *head, const char *name) { struct dso *pos; - list_for_each_entry(pos, &dsos, node) + list_for_each_entry(pos, head, node) if (strcmp(pos->name, name) == 0) return pos; return NULL; @@ -959,79 +1590,190 @@ static struct dso *dsos__find(const char *name) struct dso *dsos__findnew(const char *name) { - struct dso *dso = dsos__find(name); - int nr; + struct dso *dso = dsos__find(&dsos__user, name); - 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 (!dso) { + dso = dso__new(name); + if (dso != NULL) { + dsos__add(&dsos__user, dso); + dso__set_basename(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; +static void __dsos__fprintf(struct list_head *head, FILE *fp) +{ + struct dso *pos; + + list_for_each_entry(pos, head, node) { + int i; + for (i = 0; i < MAP__NR_TYPES; ++i) + dso__fprintf(pos, i, fp); + } } void dsos__fprintf(FILE *fp) { + __dsos__fprintf(&dsos__kernel, fp); + __dsos__fprintf(&dsos__user, fp); +} + +static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp) +{ struct dso *pos; + size_t ret = 0; - list_for_each_entry(pos, &dsos, node) - dso__fprintf(pos, fp); + list_for_each_entry(pos, head, node) { + ret += dso__fprintf_buildid(pos, fp); + ret += fprintf(fp, " %s\n", pos->long_name); + } + return ret; } -static struct symbol *vdso__find_symbol(struct dso *dso, u64 ip) +size_t dsos__fprintf_buildid(FILE *fp) { - return dso__find_symbol(dso, ip); + return (__dsos__fprintf_buildid(&dsos__kernel, fp) + + __dsos__fprintf_buildid(&dsos__user, fp)); } -int load_kernel(void) +static struct dso *dsos__create_kernel( const char *vmlinux) { - int err; + struct dso *kernel = dso__new(vmlinux ?: "[kernel.kallsyms]"); + + if (kernel == NULL) + return NULL; + + kernel->short_name = "[kernel]"; + kernel->kernel = 1; - kernel_dso = dso__new("[kernel]", 0); - if (!kernel_dso) + vdso = dso__new("[vdso]"); + if (vdso == NULL) + goto out_delete_kernel_dso; + dso__set_loaded(vdso, MAP__FUNCTION); + + if (sysfs__read_build_id("/sys/kernel/notes", kernel->build_id, + sizeof(kernel->build_id)) == 0) + kernel->has_build_id = true; + + dsos__add(&dsos__kernel, kernel); + dsos__add(&dsos__user, vdso); + + return kernel; + +out_delete_kernel_dso: + dso__delete(kernel); + return NULL; +} + +static int map_groups__create_kernel_maps(struct map_groups *self, const char *vmlinux) +{ + struct map *functions, *variables; + struct dso *kernel = dsos__create_kernel(vmlinux); + + if (kernel == NULL) 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); + functions = map__new2(0, kernel, MAP__FUNCTION); + if (functions == NULL) + return -1; - vdso = dso__new("[vdso]", 0); - if (!vdso) + variables = map__new2(0, kernel, MAP__VARIABLE); + if (variables == NULL) { + map__delete(functions); return -1; + } + + functions->map_ip = functions->unmap_ip = + variables->map_ip = variables->unmap_ip = identity__map_ip; + map_groups__insert(self, functions); + map_groups__insert(self, variables); - vdso->find_symbol = vdso__find_symbol; + return 0; +} - dsos__add(vdso); +static void vmlinux_path__exit(void) +{ + while (--vmlinux_path__nr_entries >= 0) { + free(vmlinux_path[vmlinux_path__nr_entries]); + vmlinux_path[vmlinux_path__nr_entries] = NULL; + } - hypervisor_dso = dso__new("[hypervisor]", 0); - if (!hypervisor_dso) + free(vmlinux_path); + vmlinux_path = NULL; +} + +static int vmlinux_path__init(void) +{ + struct utsname uts; + char bf[PATH_MAX]; + + if (uname(&uts) < 0) return -1; - dsos__add(hypervisor_dso); - return err; -} + vmlinux_path = malloc(sizeof(char *) * 5); + if (vmlinux_path == NULL) + return -1; + + vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); + if (vmlinux_path[vmlinux_path__nr_entries] == NULL) + goto out_fail; + ++vmlinux_path__nr_entries; + vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); + if (vmlinux_path[vmlinux_path__nr_entries] == NULL) + goto out_fail; + ++vmlinux_path__nr_entries; + snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); + vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); + if (vmlinux_path[vmlinux_path__nr_entries] == NULL) + goto out_fail; + ++vmlinux_path__nr_entries; + snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); + vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); + if (vmlinux_path[vmlinux_path__nr_entries] == NULL) + goto out_fail; + ++vmlinux_path__nr_entries; + snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", + uts.release); + vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); + if (vmlinux_path[vmlinux_path__nr_entries] == NULL) + goto out_fail; + ++vmlinux_path__nr_entries; + + return 0; +out_fail: + vmlinux_path__exit(); + return -1; +} -void symbol__init(void) +int symbol__init(struct symbol_conf *conf) { + const struct symbol_conf *pconf = conf ?: &symbol_conf__defaults; + elf_version(EV_CURRENT); + symbol__priv_size = pconf->priv_size; + if (pconf->sort_by_name) + symbol__priv_size += (sizeof(struct symbol_name_rb_node) - + sizeof(struct symbol)); + map_groups__init(kmaps); + + if (pconf->try_vmlinux_path && vmlinux_path__init() < 0) + return -1; + + if (map_groups__create_kernel_maps(kmaps, pconf->vmlinux_name) < 0) { + vmlinux_path__exit(); + return -1; + } + + kmaps->use_modules = pconf->use_modules; + if (pconf->use_modules && map_groups__create_module_maps(kmaps) < 0) + pr_debug("Failed to load list of modules in use, " + "continuing...\n"); + /* + * Now that we have all the maps created, just set the ->end of them: + */ + map_groups__fixup_end(kmaps); + return 0; } |