/* * builtin-annotate.c * * Builtin annotate command: Analyze the perf.data input file, * look up and read DSOs and symbol information and display * a histogram of results, along various sorting keys. */ #include "builtin.h" #include "util/util.h" #include "util/color.h" #include <linux/list.h> #include "util/cache.h" #include <linux/rbtree.h> #include "util/symbol.h" #include "util/string.h" #include "perf.h" #include "util/debug.h" #include "util/event.h" #include "util/parse-options.h" #include "util/parse-events.h" #include "util/thread.h" #include "util/sort.h" #include "util/hist.h" #include "util/session.h" static char const *input_name = "perf.data"; static int force; static int full_paths; static int print_line; struct sym_hist { u64 sum; u64 ip[0]; }; struct sym_ext { struct rb_node node; double percent; char *path; }; struct sym_priv { struct sym_hist *hist; struct sym_ext *ext; }; static const char *sym_hist_filter; static int symbol_filter(struct map *map __used, struct symbol *sym) { if (sym_hist_filter == NULL || strcmp(sym->name, sym_hist_filter) == 0) { struct sym_priv *priv = symbol__priv(sym); const int size = (sizeof(*priv->hist) + (sym->end - sym->start) * sizeof(u64)); priv->hist = malloc(size); if (priv->hist) memset(priv->hist, 0, size); return 0; } /* * FIXME: We should really filter it out, as we don't want to go thru symbols * we're not interested, and if a DSO ends up with no symbols, delete it too, * but right now the kernel loading routines in symbol.c bail out if no symbols * are found, fix it later. */ return 0; } /* * collect histogram counts */ static void hist_hit(struct hist_entry *he, u64 ip) { unsigned int sym_size, offset; struct symbol *sym = he->sym; struct sym_priv *priv; struct sym_hist *h; he->count++; if (!sym || !he->map) return; priv = symbol__priv(sym); if (!priv->hist) return; sym_size = sym->end - sym->start; offset = ip - sym->start; if (verbose) fprintf(stderr, "%s: ip=%Lx\n", __func__, he->map->unmap_ip(he->map, ip)); if (offset >= sym_size) return; h = priv->hist; h->sum++; h->ip[offset]++; if (verbose >= 3) printf("%p %s: count++ [ip: %p, %08Lx] => %Ld\n", (void *)(unsigned long)he->sym->start, he->sym->name, (void *)(unsigned long)ip, ip - he->sym->start, h->ip[offset]); } static int perf_session__add_hist_entry(struct perf_session *self, struct addr_location *al, u64 count) { bool hit; struct hist_entry *he = __perf_session__add_hist_entry(self, al, NULL, count, &hit); if (he == NULL) return -ENOMEM; hist_hit(he, al->addr); return 0; } static int process_sample_event(event_t *event, struct perf_session *session) { struct addr_location al; dump_printf("(IP, %d): %d: %p\n", event->header.misc, event->ip.pid, (void *)(long)event->ip.ip); if (event__preprocess_sample(event, session, &al, symbol_filter) < 0) { fprintf(stderr, "problem processing %d event, skipping it.\n", event->header.type); return -1; } if (!al.filtered && perf_session__add_hist_entry(session, &al, 1)) { fprintf(stderr, "problem incrementing symbol count, " "skipping event\n"); return -1; } return 0; } static int parse_line(FILE *file, struct hist_entry *he, u64 len) { struct symbol *sym = he->sym; char *line = NULL, *tmp, *tmp2; static const char *prev_line; static const char *prev_color; unsigned int offset; size_t line_len; u64 start; s64 line_ip; int ret; char *c; if (getline(&line, &line_len, file) < 0) return -1; if (!line) return -1; c = strchr(line, '\n'); if (c) *c = 0; line_ip = -1; offset = 0; ret = -2; /* * Strip leading spaces: */ tmp = line; while (*tmp) { if (*tmp != ' ') break; tmp++; } if (*tmp) { /* * Parse hexa addresses followed by ':' */ line_ip = strtoull(tmp, &tmp2, 16); if (*tmp2 != ':') line_ip = -1; } start = he->map->unmap_ip(he->map, sym->start); if (line_ip != -1) { const char *path = NULL; unsigned int hits = 0; double percent = 0.0; const char *color; struct sym_priv *priv = symbol__priv(sym); struct sym_ext *sym_ext = priv->ext; struct sym_hist *h = priv->hist; offset = line_ip - start; if (offset < len) hits = h->ip[offset]; if (offset < len && sym_ext) { path = sym_ext[offset].path; percent = sym_ext[offset].percent; } else if (h->sum) percent = 100.0 * hits / h->sum; color = get_percent_color(percent); /* * Also color the filename and line if needed, with * the same color than the percentage. Don't print it * twice for close colored ip with the same filename:line */ if (path) { if (!prev_line || strcmp(prev_line, path) || color != prev_color) { color_fprintf(stdout, color, " %s", path); prev_line = path; prev_color = color; } } color_fprintf(stdout, color, " %7.2f", percent); printf(" : "); color_fprintf(stdout, PERF_COLOR_BLUE, "%s\n", line); } else { if (!*line) printf(" :\n"); else printf(" : %s\n", line); } return 0; } static struct rb_root root_sym_ext; static void insert_source_line(struct sym_ext *sym_ext) { struct sym_ext *iter; struct rb_node **p = &root_sym_ext.rb_node; struct rb_node *parent = NULL; while (*p != NULL) { parent = *p; iter = rb_entry(parent, struct sym_ext, node); if (sym_ext->percent > iter->percent) p = &(*p)->rb_left; else p = &(*p)->rb_right; } rb_link_node(&sym_ext->node, parent, p); rb_insert_color(&sym_ext->node, &root_sym_ext); } static void free_source_line(struct hist_entry *he, int len) { struct sym_priv *priv = symbol__priv(he->sym); struct sym_ext *sym_ext = priv->ext; int i; if (!sym_ext) return; for (i = 0; i < len; i++) free(sym_ext[i].path); free(sym_ext); priv->ext = NULL; root_sym_ext = RB_ROOT; } /* Get the filename:line for the colored entries */ static void get_source_line(struct hist_entry *he, int len, const char *filename) { struct symbol *sym = he->sym; u64 start; int i; char cmd[PATH_MAX * 2]; struct sym_ext *sym_ext; struct sym_priv *priv = symbol__priv(sym); struct sym_hist *h = priv->hist; if (!h->sum) return; sym_ext = priv->ext = calloc(len, sizeof(struct sym_ext)); if (!priv->ext) return; start = he->map->unmap_ip(he->map, sym->start); for (i = 0; i < len; i++) { char *path = NULL; size_t line_len; u64 offset; FILE *fp; sym_ext[i].percent = 100.0 * h->ip[i] / h->sum; if (sym_ext[i].percent <= 0.5) continue; offset = start + i; sprintf(cmd, "addr2line -e %s %016llx", filename, offset); fp = popen(cmd, "r"); if (!fp) continue; if (getline(&path, &line_len, fp) < 0 || !line_len) goto next; sym_ext[i].path = malloc(sizeof(char) * line_len + 1); if (!sym_ext[i].path) goto next; strcpy(sym_ext[i].path, path); insert_source_line(&sym_ext[i]); next: pclose(fp); } } static void print_summary(const char *filename) { struct sym_ext *sym_ext; struct rb_node *node; printf("\nSorted summary for file %s\n", filename); printf("----------------------------------------------\n\n"); if (RB_EMPTY_ROOT(&root_sym_ext)) { printf(" Nothing higher than %1.1f%%\n", MIN_GREEN); return; } node = rb_first(&root_sym_ext); while (node) { double percent; const char *color; char *path; sym_ext = rb_entry(node, struct sym_ext, node); percent = sym_ext->percent; color = get_percent_color(percent); path = sym_ext->path; color_fprintf(stdout, color, " %7.2f %s", percent, path); node = rb_next(node); } } static void annotate_sym(struct hist_entry *he) { struct map *map = he->map; struct dso *dso = map->dso; struct symbol *sym = he->sym; const char *filename = dso->long_name, *d_filename; u64 len; char command[PATH_MAX*2]; FILE *file; if (!filename) return; if (verbose) fprintf(stderr, "%s: filename=%s, sym=%s, start=%Lx, end=%Lx\n", __func__, filename, sym->name, map->unmap_ip(map, sym->start), map->unmap_ip(map, sym->end)); if (full_paths) d_filename = filename; else d_filename = basename(filename); len = sym->end - sym->start; if (print_line) { get_source_line(he, len, filename); print_summary(filename); } printf("\n\n------------------------------------------------\n"); printf(" Percent | Source code & Disassembly of %s\n", d_filename); printf("------------------------------------------------\n"); if (verbose >= 2) printf("annotating [%p] %30s : [%p] %30s\n", dso, dso->long_name, sym, sym->name); sprintf(command, "objdump --start-address=0x%016Lx --stop-address=0x%016Lx -dS %s|grep -v %s", map->unmap_ip(map, sym->start), map->unmap_ip(map, sym->end), filename, filename); if (verbose >= 3) printf("doing: %s\n", command); file = popen(command, "r"); if (!file) return; while (!feof(file)) { if (parse_line(file, he, len) < 0) break; } pclose(file); if (print_line) free_source_line(he, len); } static void perf_session__find_annotations(struct perf_session *self) { struct rb_node *nd; for (nd = rb_first(&self->hists); nd; nd = rb_next(nd)) { struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node); struct sym_priv *priv; if (he->sym == NULL) continue; priv = symbol__priv(he->sym); if (priv->hist == NULL) continue; annotate_sym(he); /* * Since we have a hist_entry per IP for the same symbol, free * he->sym->hist to signal we already processed this symbol. */ free(priv->hist); priv->hist = NULL; } } static struct perf_event_ops event_ops = { .process_sample_event = process_sample_event, .process_mmap_event = event__process_mmap, .process_comm_event = event__process_comm, .process_fork_event = event__process_task, }; static int __cmd_annotate(void) { int ret; struct perf_session *session; session = perf_session__new(input_name, O_RDONLY, force); if (session == NULL) return -ENOMEM; ret = perf_session__process_events(session, &event_ops); if (ret) goto out_delete; if (dump_trace) { event__print_totals(); goto out_delete; } if (verbose > 3) perf_session__fprintf(session, stdout); if (verbose > 2) dsos__fprintf(stdout); perf_session__collapse_resort(session); perf_session__output_resort(session, session->event_total[0]); perf_session__find_annotations(session); out_delete: perf_session__delete(session); return ret; } static const char * const annotate_usage[] = { "perf annotate [<options>] <command>", NULL }; static const struct option options[] = { OPT_STRING('i', "input", &input_name, "file", "input file name"), OPT_STRING('s', "symbol", &sym_hist_filter, "symbol", "symbol to annotate"), OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), OPT_BOOLEAN('v', "verbose", &verbose, "be more verbose (show symbol address, etc)"), OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, "dump raw trace in ASCII"), OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name, "file", "vmlinux pathname"), OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules, "load module symbols - WARNING: use only with -k and LIVE kernel"), OPT_BOOLEAN('l', "print-line", &print_line, "print matching source lines (may be slow)"), OPT_BOOLEAN('P', "full-paths", &full_paths, "Don't shorten the displayed pathnames"), OPT_END() }; int cmd_annotate(int argc, const char **argv, const char *prefix __used) { argc = parse_options(argc, argv, options, annotate_usage, 0); symbol_conf.priv_size = sizeof(struct sym_priv); symbol_conf.try_vmlinux_path = true; if (symbol__init() < 0) return -1; setup_sorting(annotate_usage, options); if (argc) { /* * Special case: if there's an argument left then assume tha * it's a symbol filter: */ if (argc > 1) usage_with_options(annotate_usage, options); sym_hist_filter = argv[0]; } setup_pager(); if (field_sep && *field_sep == '.') { fputs("'.' is the only non valid --field-separator argument\n", stderr); exit(129); } return __cmd_annotate(); }