diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-07-22 11:41:56 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-07-22 11:41:56 -0700 |
commit | 3c3301083e3bea4d14c597106c7b20b4b85fc03d (patch) | |
tree | 6eabdd073bdc27eb3f0dd999ea946955afca18bf /tools | |
parent | 612e900c286a9535cc17da5171b0d8dcf8f3a12f (diff) | |
parent | 0fdc7e67dd312986e30b861adff48732bd33eb3f (diff) | |
download | kernel_samsung_aries-3c3301083e3bea4d14c597106c7b20b4b85fc03d.zip kernel_samsung_aries-3c3301083e3bea4d14c597106c7b20b4b85fc03d.tar.gz kernel_samsung_aries-3c3301083e3bea4d14c597106c7b20b4b85fc03d.tar.bz2 |
Merge branch 'perf-counters-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/peterz/linux-2.6-perf
* 'perf-counters-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/peterz/linux-2.6-perf: (31 commits)
perf_counter tools: Give perf top inherit option
perf_counter tools: Fix vmlinux symbol generation breakage
perf_counter: Detect debugfs location
perf_counter: Add tracepoint support to perf list, perf stat
perf symbol: C++ demangling
perf: avoid structure size confusion by using a fixed size
perf_counter: Fix throttle/unthrottle event logging
perf_counter: Improve perf stat and perf record option parsing
perf_counter: PERF_SAMPLE_ID and inherited counters
perf_counter: Plug more stack leaks
perf: Fix stack data leak
perf_counter: Remove unused variables
perf_counter: Make call graph option consistent
perf_counter: Add perf record option to log addresses
perf_counter: Log vfork as a fork event
perf_counter: Synthesize VDSO mmap event
perf_counter: Make sure we dont leak kernel memory to userspace
perf_counter tools: Fix index boundary check
perf_counter: Fix the tracepoint channel to perfcounters
perf_counter, x86: Extend perf_counter Pentium M support
...
Diffstat (limited to 'tools')
-rw-r--r-- | tools/perf/Documentation/perf-report.txt | 15 | ||||
-rw-r--r-- | tools/perf/Makefile | 2 | ||||
-rw-r--r-- | tools/perf/builtin-annotate.c | 24 | ||||
-rw-r--r-- | tools/perf/builtin-record.c | 13 | ||||
-rw-r--r-- | tools/perf/builtin-report.c | 255 | ||||
-rw-r--r-- | tools/perf/builtin-stat.c | 3 | ||||
-rw-r--r-- | tools/perf/builtin-top.c | 6 | ||||
-rw-r--r-- | tools/perf/perf.c | 77 | ||||
-rw-r--r-- | tools/perf/perf.h | 8 | ||||
-rw-r--r-- | tools/perf/util/cache.h | 1 | ||||
-rw-r--r-- | tools/perf/util/header.h | 2 | ||||
-rw-r--r-- | tools/perf/util/include/linux/kernel.h | 8 | ||||
-rw-r--r-- | tools/perf/util/parse-events.c | 182 | ||||
-rw-r--r-- | tools/perf/util/parse-events.h | 5 | ||||
-rw-r--r-- | tools/perf/util/string.h | 3 | ||||
-rw-r--r-- | tools/perf/util/strlist.c | 20 | ||||
-rw-r--r-- | tools/perf/util/strlist.h | 11 | ||||
-rw-r--r-- | tools/perf/util/symbol.c | 145 | ||||
-rw-r--r-- | tools/perf/util/symbol.h | 1 | ||||
-rw-r--r-- | tools/perf/util/util.h | 2 |
20 files changed, 616 insertions, 167 deletions
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt index 8aa3f8c..e72e931 100644 --- a/tools/perf/Documentation/perf-report.txt +++ b/tools/perf/Documentation/perf-report.txt @@ -24,6 +24,9 @@ OPTIONS --dsos=:: Only consider symbols in these dsos. CSV that understands file://filename entries. +-n +--show-nr-samples + Show the number of samples for each symbol -C:: --comms=:: Only consider symbols in these comms. CSV that understands @@ -33,6 +36,18 @@ OPTIONS Only consider these symbols. CSV that understands file://filename entries. +-w:: +--field-width=:: + Force each column width to the provided list, for large terminal + readability. + +-t:: +--field-separator=:: + + Use a special separator character and don't pad with spaces, replacing + all occurances of this separator in symbol names (and other output) + with a '.' character, that thus it's the only non valid separator. + SEE ALSO -------- linkperf:perf-stat[1] diff --git a/tools/perf/Makefile b/tools/perf/Makefile index 7822b3d..a5e9b87 100644 --- a/tools/perf/Makefile +++ b/tools/perf/Makefile @@ -345,7 +345,7 @@ BUILTIN_OBJS += builtin-stat.o BUILTIN_OBJS += builtin-top.o PERFLIBS = $(LIB_FILE) -EXTLIBS = +EXTLIBS = -lbfd # # Platform specific tweaks diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c index 5f9eefe..1dba568 100644 --- a/tools/perf/builtin-annotate.c +++ b/tools/perf/builtin-annotate.c @@ -74,20 +74,12 @@ struct fork_event { u32 pid, ppid; }; -struct period_event { - struct perf_event_header header; - u64 time; - u64 id; - u64 sample_period; -}; - typedef union event_union { struct perf_event_header header; struct ip_event ip; struct mmap_event mmap; struct comm_event comm; struct fork_event fork; - struct period_event period; } event_t; @@ -998,19 +990,6 @@ process_fork_event(event_t *event, unsigned long offset, unsigned long head) } static int -process_period_event(event_t *event, unsigned long offset, unsigned long head) -{ - dprintf("%p [%p]: PERF_EVENT_PERIOD: time:%Ld, id:%Ld: period:%Ld\n", - (void *)(offset + head), - (void *)(long)(event->header.size), - event->period.time, - event->period.id, - event->period.sample_period); - - return 0; -} - -static int process_event(event_t *event, unsigned long offset, unsigned long head) { switch (event->header.type) { @@ -1025,9 +1004,6 @@ process_event(event_t *event, unsigned long offset, unsigned long head) case PERF_EVENT_FORK: return process_fork_event(event, offset, head); - - case PERF_EVENT_PERIOD: - return process_period_event(event, offset, head); /* * We dont process them right now but they are fine: */ diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 4ef78a5..6da0992 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -43,6 +43,7 @@ static int call_graph = 0; static int verbose = 0; static int inherit_stat = 0; static int no_samples = 0; +static int sample_address = 0; static long samples; static struct timeval last_read; @@ -313,6 +314,10 @@ static void pid_synthesize_mmap_samples(pid_t pid) if (*pbf == 'x') { /* vm_exec */ char *execname = strchr(bf, '/'); + /* Catch VDSO */ + if (execname == NULL) + execname = strstr(bf, "[vdso]"); + if (execname == NULL) continue; @@ -401,6 +406,9 @@ static void create_counter(int counter, int cpu, pid_t pid) if (inherit_stat) attr->inherit_stat = 1; + if (sample_address) + attr->sample_type |= PERF_SAMPLE_ADDR; + if (call_graph) attr->sample_type |= PERF_SAMPLE_CALLCHAIN; @@ -645,6 +653,8 @@ static const struct option options[] = { "be more verbose (show counter open errors, etc)"), OPT_BOOLEAN('s', "stat", &inherit_stat, "per thread counts"), + OPT_BOOLEAN('d', "data", &sample_address, + "Sample addresses"), OPT_BOOLEAN('n', "no-samples", &no_samples, "don't sample"), OPT_END() @@ -654,7 +664,8 @@ int cmd_record(int argc, const char **argv, const char *prefix __used) { int counter; - argc = parse_options(argc, argv, options, record_usage, 0); + argc = parse_options(argc, argv, options, record_usage, + PARSE_OPT_STOP_AT_NON_OPTION); if (!argc && target_pid == -1 && !system_wide) usage_with_options(record_usage, options); diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index 4e5cc26..b20a4b6 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -33,8 +33,10 @@ static char *vmlinux = NULL; static char default_sort_order[] = "comm,dso"; static char *sort_order = default_sort_order; -static char *dso_list_str, *comm_list_str, *sym_list_str; +static char *dso_list_str, *comm_list_str, *sym_list_str, + *col_width_list_str; static struct strlist *dso_list, *comm_list, *sym_list; +static char *field_sep; static int input; static int show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV; @@ -49,6 +51,7 @@ static int verbose; static int modules; static int full_paths; +static int show_nr_samples; static unsigned long page_size; static unsigned long mmap_window = 32; @@ -98,13 +101,6 @@ struct fork_event { u32 pid, ppid; }; -struct period_event { - struct perf_event_header header; - u64 time; - u64 id; - u64 sample_period; -}; - struct lost_event { struct perf_event_header header; u64 id; @@ -124,11 +120,37 @@ typedef union event_union { struct mmap_event mmap; struct comm_event comm; struct fork_event fork; - struct period_event period; struct lost_event lost; struct read_event read; } event_t; +static int repsep_fprintf(FILE *fp, const char *fmt, ...) +{ + int n; + va_list ap; + + va_start(ap, fmt); + if (!field_sep) + n = vfprintf(fp, fmt, ap); + else { + char *bf = NULL; + n = vasprintf(&bf, fmt, ap); + if (n > 0) { + char *sep = bf; + while (1) { + sep = strchr(sep, *field_sep); + if (sep == NULL) + break; + *sep = '.'; + } + } + fputs(bf, fp); + free(bf); + } + va_end(ap); + return n; +} + static LIST_HEAD(dsos); static struct dso *kernel_dso; static struct dso *vdso; @@ -360,12 +382,28 @@ static struct thread *thread__new(pid_t pid) return self; } +static unsigned int dsos__col_width, + comms__col_width, + threads__col_width; + static int thread__set_comm(struct thread *self, const char *comm) { if (self->comm) free(self->comm); self->comm = strdup(comm); - return self->comm ? 0 : -ENOMEM; + if (!self->comm) + return -ENOMEM; + + if (!col_width_list_str && !field_sep && + (!comm_list || strlist__has_entry(comm_list, comm))) { + unsigned int slen = strlen(comm); + if (slen > comms__col_width) { + comms__col_width = slen; + threads__col_width = slen + 6; + } + } + + return 0; } static size_t thread__fprintf(struct thread *self, FILE *fp) @@ -536,7 +574,9 @@ struct sort_entry { int64_t (*cmp)(struct hist_entry *, struct hist_entry *); int64_t (*collapse)(struct hist_entry *, struct hist_entry *); - size_t (*print)(FILE *fp, struct hist_entry *); + size_t (*print)(FILE *fp, struct hist_entry *, unsigned int width); + unsigned int *width; + bool elide; }; static int64_t cmp_null(void *l, void *r) @@ -558,15 +598,17 @@ sort__thread_cmp(struct hist_entry *left, struct hist_entry *right) } static size_t -sort__thread_print(FILE *fp, struct hist_entry *self) +sort__thread_print(FILE *fp, struct hist_entry *self, unsigned int width) { - return fprintf(fp, "%16s:%5d", self->thread->comm ?: "", self->thread->pid); + return repsep_fprintf(fp, "%*s:%5d", width - 6, + self->thread->comm ?: "", self->thread->pid); } static struct sort_entry sort_thread = { - .header = " Command: Pid", + .header = "Command: Pid", .cmp = sort__thread_cmp, .print = sort__thread_print, + .width = &threads__col_width, }; /* --sort comm */ @@ -590,16 +632,17 @@ sort__comm_collapse(struct hist_entry *left, struct hist_entry *right) } static size_t -sort__comm_print(FILE *fp, struct hist_entry *self) +sort__comm_print(FILE *fp, struct hist_entry *self, unsigned int width) { - return fprintf(fp, "%16s", self->thread->comm); + return repsep_fprintf(fp, "%*s", width, self->thread->comm); } static struct sort_entry sort_comm = { - .header = " Command", + .header = "Command", .cmp = sort__comm_cmp, .collapse = sort__comm_collapse, .print = sort__comm_print, + .width = &comms__col_width, }; /* --sort dso */ @@ -617,18 +660,19 @@ sort__dso_cmp(struct hist_entry *left, struct hist_entry *right) } static size_t -sort__dso_print(FILE *fp, struct hist_entry *self) +sort__dso_print(FILE *fp, struct hist_entry *self, unsigned int width) { if (self->dso) - return fprintf(fp, "%-25s", self->dso->name); + return repsep_fprintf(fp, "%-*s", width, self->dso->name); - return fprintf(fp, "%016llx ", (u64)self->ip); + return repsep_fprintf(fp, "%*llx", width, (u64)self->ip); } static struct sort_entry sort_dso = { - .header = "Shared Object ", + .header = "Shared Object", .cmp = sort__dso_cmp, .print = sort__dso_print, + .width = &dsos__col_width, }; /* --sort symbol */ @@ -648,22 +692,22 @@ sort__sym_cmp(struct hist_entry *left, struct hist_entry *right) } static size_t -sort__sym_print(FILE *fp, struct hist_entry *self) +sort__sym_print(FILE *fp, struct hist_entry *self, unsigned int width __used) { size_t ret = 0; if (verbose) - ret += fprintf(fp, "%#018llx ", (u64)self->ip); + ret += repsep_fprintf(fp, "%#018llx ", (u64)self->ip); + ret += repsep_fprintf(fp, "[%c] ", self->level); if (self->sym) { - ret += fprintf(fp, "[%c] %s", - self->dso == kernel_dso ? 'k' : - self->dso == hypervisor_dso ? 'h' : '.', self->sym->name); + ret += repsep_fprintf(fp, "%s", self->sym->name); if (self->sym->module) - ret += fprintf(fp, "\t[%s]", self->sym->module->name); + ret += repsep_fprintf(fp, "\t[%s]", + self->sym->module->name); } else { - ret += fprintf(fp, "%#016llx", (u64)self->ip); + ret += repsep_fprintf(fp, "%#016llx", (u64)self->ip); } return ret; @@ -690,19 +734,19 @@ sort__parent_cmp(struct hist_entry *left, struct hist_entry *right) } static size_t -sort__parent_print(FILE *fp, struct hist_entry *self) +sort__parent_print(FILE *fp, struct hist_entry *self, unsigned int width) { - size_t ret = 0; - - ret += fprintf(fp, "%-20s", self->parent ? self->parent->name : "[other]"); - - return ret; + return repsep_fprintf(fp, "%-*s", width, + self->parent ? self->parent->name : "[other]"); } +static unsigned int parent_symbol__col_width; + static struct sort_entry sort_parent = { - .header = "Parent symbol ", + .header = "Parent symbol", .cmp = sort__parent_cmp, .print = sort__parent_print, + .width = &parent_symbol__col_width, }; static int sort__need_collapse = 0; @@ -967,17 +1011,25 @@ hist_entry__fprintf(FILE *fp, struct hist_entry *self, u64 total_samples) return 0; if (total_samples) - ret = percent_color_fprintf(fp, " %6.2f%%", - (self->count * 100.0) / total_samples); + ret = percent_color_fprintf(fp, + field_sep ? "%.2f" : " %6.2f%%", + (self->count * 100.0) / total_samples); else - ret = fprintf(fp, "%12Ld ", self->count); + ret = fprintf(fp, field_sep ? "%lld" : "%12lld ", self->count); + + if (show_nr_samples) { + if (field_sep) + fprintf(fp, "%c%lld", *field_sep, self->count); + else + fprintf(fp, "%11lld", self->count); + } list_for_each_entry(se, &hist_entry__sort_list, list) { - if (exclude_other && (se == &sort_parent)) + if (se->elide) continue; - fprintf(fp, " "); - ret += se->print(fp, self); + fprintf(fp, "%s", field_sep ?: " "); + ret += se->print(fp, self, se->width ? *se->width : 0); } ret += fprintf(fp, "\n"); @@ -992,6 +1044,18 @@ hist_entry__fprintf(FILE *fp, struct hist_entry *self, u64 total_samples) * */ +static void dso__calc_col_width(struct dso *self) +{ + if (!col_width_list_str && !field_sep && + (!dso_list || strlist__has_entry(dso_list, self->name))) { + unsigned int slen = strlen(self->name); + if (slen > dsos__col_width) + dsos__col_width = slen; + } + + self->slen_calculated = 1; +} + static struct symbol * resolve_symbol(struct thread *thread, struct map **mapp, struct dso **dsop, u64 *ipp) @@ -1011,6 +1075,14 @@ resolve_symbol(struct thread *thread, struct map **mapp, map = thread__find_map(thread, ip); if (map != NULL) { + /* + * We have to do this here as we may have a dso + * with no symbol hit that has a name longer than + * the ones with symbols sampled. + */ + if (!sort_dso.elide && !map->dso->slen_calculated) + dso__calc_col_width(map->dso); + if (mapp) *mapp = map; got_map: @@ -1282,35 +1354,67 @@ static size_t output__fprintf(FILE *fp, u64 total_samples) struct sort_entry *se; struct rb_node *nd; size_t ret = 0; + unsigned int width; + char *col_width = col_width_list_str; - fprintf(fp, "\n"); - fprintf(fp, "#\n"); - fprintf(fp, "# (%Ld samples)\n", (u64)total_samples); + fprintf(fp, "# Samples: %Ld\n", (u64)total_samples); fprintf(fp, "#\n"); fprintf(fp, "# Overhead"); + if (show_nr_samples) { + if (field_sep) + fprintf(fp, "%cSamples", *field_sep); + else + fputs(" Samples ", fp); + } list_for_each_entry(se, &hist_entry__sort_list, list) { - if (exclude_other && (se == &sort_parent)) + if (se->elide) continue; - fprintf(fp, " %s", se->header); + if (field_sep) { + fprintf(fp, "%c%s", *field_sep, se->header); + continue; + } + width = strlen(se->header); + if (se->width) { + if (col_width_list_str) { + if (col_width) { + *se->width = atoi(col_width); + col_width = strchr(col_width, ','); + if (col_width) + ++col_width; + } + } + width = *se->width = max(*se->width, width); + } + fprintf(fp, " %*s", width, se->header); } fprintf(fp, "\n"); + if (field_sep) + goto print_entries; + fprintf(fp, "# ........"); + if (show_nr_samples) + fprintf(fp, " .........."); list_for_each_entry(se, &hist_entry__sort_list, list) { unsigned int i; - if (exclude_other && (se == &sort_parent)) + if (se->elide) continue; fprintf(fp, " "); - for (i = 0; i < strlen(se->header); i++) + if (se->width) + width = *se->width; + else + width = strlen(se->header); + for (i = 0; i < width; i++) fprintf(fp, "."); } fprintf(fp, "\n"); fprintf(fp, "#\n"); +print_entries: for (nd = rb_first(&output_hists); nd; nd = rb_next(nd)) { pos = rb_entry(nd, struct hist_entry, rb_node); ret += hist_entry__fprintf(fp, pos, total_samples); @@ -1524,19 +1628,6 @@ process_fork_event(event_t *event, unsigned long offset, unsigned long head) } static int -process_period_event(event_t *event, unsigned long offset, unsigned long head) -{ - dprintf("%p [%p]: PERF_EVENT_PERIOD: time:%Ld, id:%Ld: period:%Ld\n", - (void *)(offset + head), - (void *)(long)(event->header.size), - event->period.time, - event->period.id, - event->period.sample_period); - - return 0; -} - -static int process_lost_event(event_t *event, unsigned long offset, unsigned long head) { dprintf("%p [%p]: PERF_EVENT_LOST: id:%Ld: lost:%Ld\n", @@ -1617,9 +1708,6 @@ process_event(event_t *event, unsigned long offset, unsigned long head) case PERF_EVENT_FORK: return process_fork_event(event, offset, head); - case PERF_EVENT_PERIOD: - return process_period_event(event, offset, head); - case PERF_EVENT_LOST: return process_lost_event(event, offset, head); @@ -1883,6 +1971,8 @@ static const struct option options[] = { OPT_STRING('k', "vmlinux", &vmlinux, "file", "vmlinux pathname"), OPT_BOOLEAN('m', "modules", &modules, "load module symbols - WARNING: use only with -k and LIVE kernel"), + OPT_BOOLEAN('n', "show-nr-samples", &show_nr_samples, + "Show a column with the number of samples"), OPT_STRING('s', "sort", &sort_order, "key[,key2...]", "sort by key(s): pid, comm, dso, symbol, parent"), OPT_BOOLEAN('P', "full-paths", &full_paths, @@ -1891,15 +1981,21 @@ static const struct option options[] = { "regex filter to identify parent, see: '--sort parent'"), OPT_BOOLEAN('x', "exclude-other", &exclude_other, "Only display entries with parent-match"), - OPT_CALLBACK_DEFAULT('c', "callchain", NULL, "output_type,min_percent", + OPT_CALLBACK_DEFAULT('g', "call-graph", NULL, "output_type,min_percent", "Display callchains using output_type and min percent threshold. " - "Default: flat,0", &parse_callchain_opt, callchain_default_opt), + "Default: fractal,0.5", &parse_callchain_opt, callchain_default_opt), OPT_STRING('d', "dsos", &dso_list_str, "dso[,dso...]", "only consider symbols in these dsos"), OPT_STRING('C', "comms", &comm_list_str, "comm[,comm...]", "only consider symbols in these comms"), OPT_STRING('S', "symbols", &sym_list_str, "symbol[,symbol...]", "only consider these symbols"), + OPT_STRING('w', "column-widths", &col_width_list_str, + "width[,width...]", + "don't try to adjust column width, use these fixed values"), + OPT_STRING('t', "field-separator", &field_sep, "separator", + "separator for columns, no spaces will be added between " + "columns '.' is reserved."), OPT_END() }; @@ -1919,7 +2015,8 @@ static void setup_sorting(void) } static void setup_list(struct strlist **list, const char *list_str, - const char *list_name) + struct sort_entry *se, const char *list_name, + FILE *fp) { if (list_str) { *list = strlist__new(true, list_str); @@ -1928,6 +2025,11 @@ static void setup_list(struct strlist **list, const char *list_str, list_name); exit(129); } + if (strlist__nr_entries(*list) == 1) { + fprintf(fp, "# %s: %s\n", list_name, + strlist__entry(*list, 0)->s); + se->elide = true; + } } } @@ -1941,9 +2043,10 @@ int cmd_report(int argc, const char **argv, const char *prefix __used) setup_sorting(); - if (parent_pattern != default_parent_pattern) + if (parent_pattern != default_parent_pattern) { sort_dimension__add("parent"); - else + sort_parent.elide = 1; + } else exclude_other = 0; /* @@ -1952,11 +2055,17 @@ int cmd_report(int argc, const char **argv, const char *prefix __used) if (argc) usage_with_options(report_usage, options); - setup_list(&dso_list, dso_list_str, "dso"); - setup_list(&comm_list, comm_list_str, "comm"); - setup_list(&sym_list, sym_list_str, "symbol"); - setup_pager(); + setup_list(&dso_list, dso_list_str, &sort_dso, "dso", stdout); + setup_list(&comm_list, comm_list_str, &sort_comm, "comm", stdout); + setup_list(&sym_list, sym_list_str, &sort_sym, "symbol", stdout); + + if (field_sep && *field_sep == '.') { + fputs("'.' is the only non valid --field-separator argument\n", + stderr); + exit(129); + } + return __cmd_report(); } diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 27921a8..f9510ee 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -511,7 +511,8 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used) { int status; - argc = parse_options(argc, argv, options, stat_usage, 0); + argc = parse_options(argc, argv, options, stat_usage, + PARSE_OPT_STOP_AT_NON_OPTION); if (!argc) usage_with_options(stat_usage, options); if (run_count <= 0 || run_count > MAX_RUN) diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 95d5c0a..c0a4230 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -58,6 +58,7 @@ static u64 count_filter = 5; static int print_entries = 15; static int target_pid = -1; +static int inherit = 0; static int profile_cpu = -1; static int nr_cpus = 0; static unsigned int realtime_prio = 0; @@ -549,7 +550,7 @@ int group_fd; static void start_counter(int i, int counter) { struct perf_counter_attr *attr; - unsigned int cpu; + int cpu; cpu = profile_cpu; if (target_pid == -1 && profile_cpu == -1) @@ -559,6 +560,7 @@ static void start_counter(int i, int counter) attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID; attr->freq = freq; + attr->inherit = (cpu < 0) && inherit; try_again: fd[i][counter] = sys_perf_counter_open(attr, target_pid, cpu, group_fd, 0); @@ -685,6 +687,8 @@ static const struct option options[] = { "only display functions with more events than this"), OPT_BOOLEAN('g', "group", &group, "put the counters into a counter group"), + OPT_BOOLEAN('i', "inherit", &inherit, + "child tasks inherit counters"), OPT_STRING('s', "sym-filter", &sym_filter, "pattern", "only display symbols matchig this pattern"), OPT_BOOLEAN('z', "zero", &zero, diff --git a/tools/perf/perf.c b/tools/perf/perf.c index c565678..31982ad 100644 --- a/tools/perf/perf.c +++ b/tools/perf/perf.c @@ -12,6 +12,8 @@ #include "util/cache.h" #include "util/quote.h" #include "util/run-command.h" +#include "util/parse-events.h" +#include "util/string.h" const char perf_usage_string[] = "perf [--version] [--help] COMMAND [ARGS]"; @@ -25,6 +27,8 @@ struct pager_config { int val; }; +static char debugfs_mntpt[MAXPATHLEN]; + static int pager_command_config(const char *var, const char *value, void *data) { struct pager_config *c = data; @@ -56,6 +60,15 @@ static void commit_pager_choice(void) { } } +static void set_debugfs_path(void) +{ + char *path; + + path = getenv(PERF_DEBUGFS_ENVIRONMENT); + snprintf(debugfs_path, MAXPATHLEN, "%s/%s", path ?: debugfs_mntpt, + "tracing/events"); +} + static int handle_options(const char*** argv, int* argc, int* envchanged) { int handled = 0; @@ -122,6 +135,22 @@ static int handle_options(const char*** argv, int* argc, int* envchanged) setenv(PERF_WORK_TREE_ENVIRONMENT, cmd + 12, 1); if (envchanged) *envchanged = 1; + } else if (!strcmp(cmd, "--debugfs-dir")) { + if (*argc < 2) { + fprintf(stderr, "No directory given for --debugfs-dir.\n"); + usage(perf_usage_string); + } + strncpy(debugfs_mntpt, (*argv)[1], MAXPATHLEN); + debugfs_mntpt[MAXPATHLEN - 1] = '\0'; + if (envchanged) + *envchanged = 1; + (*argv)++; + (*argc)--; + } else if (!prefixcmp(cmd, "--debugfs-dir=")) { + strncpy(debugfs_mntpt, cmd + 14, MAXPATHLEN); + debugfs_mntpt[MAXPATHLEN - 1] = '\0'; + if (envchanged) + *envchanged = 1; } else { fprintf(stderr, "Unknown option: %s\n", cmd); usage(perf_usage_string); @@ -228,6 +257,7 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv) if (use_pager == -1 && p->option & USE_PAGER) use_pager = 1; commit_pager_choice(); + set_debugfs_path(); status = p->fn(argc, argv, prefix); if (status) @@ -346,6 +376,49 @@ static int run_argv(int *argcp, const char ***argv) return done_alias; } +/* mini /proc/mounts parser: searching for "^blah /mount/point debugfs" */ +static void get_debugfs_mntpt(void) +{ + FILE *file; + char fs_type[100]; + char debugfs[MAXPATHLEN]; + + /* + * try the standard location + */ + if (valid_debugfs_mount("/sys/kernel/debug/") == 0) { + strcpy(debugfs_mntpt, "/sys/kernel/debug/"); + return; + } + + /* + * try the sane location + */ + if (valid_debugfs_mount("/debug/") == 0) { + strcpy(debugfs_mntpt, "/debug/"); + return; + } + + /* + * give up and parse /proc/mounts + */ + file = fopen("/proc/mounts", "r"); + if (file == NULL) + return; + + while (fscanf(file, "%*s %" + STR(MAXPATHLEN) + "s %99s %*s %*d %*d\n", + debugfs, fs_type) == 2) { + if (strcmp(fs_type, "debugfs") == 0) + break; + } + fclose(file); + if (strcmp(fs_type, "debugfs") == 0) { + strncpy(debugfs_mntpt, debugfs, MAXPATHLEN); + debugfs_mntpt[MAXPATHLEN - 1] = '\0'; + } +} int main(int argc, const char **argv) { @@ -354,7 +427,8 @@ int main(int argc, const char **argv) cmd = perf_extract_argv0_path(argv[0]); if (!cmd) cmd = "perf-help"; - + /* get debugfs mount point from /proc/mounts */ + get_debugfs_mntpt(); /* * "perf-xxxx" is the same as "perf xxxx", but we obviously: * @@ -377,6 +451,7 @@ int main(int argc, const char **argv) argc--; handle_options(&argv, &argc, NULL); commit_pager_choice(); + set_debugfs_path(); if (argc > 0) { if (!prefixcmp(argv[0], "--")) argv[0] += 2; diff --git a/tools/perf/perf.h b/tools/perf/perf.h index 63e67cc..e5148e2 100644 --- a/tools/perf/perf.h +++ b/tools/perf/perf.h @@ -1,7 +1,13 @@ #ifndef _PERF_PERF_H #define _PERF_PERF_H -#if defined(__x86_64__) || defined(__i386__) +#if defined(__i386__) +#include "../../arch/x86/include/asm/unistd.h" +#define rmb() asm volatile("lock; addl $0,0(%%esp)" ::: "memory") +#define cpu_relax() asm volatile("rep; nop" ::: "memory"); +#endif + +#if defined(__x86_64__) #include "../../arch/x86/include/asm/unistd.h" #define rmb() asm volatile("lfence" ::: "memory") #define cpu_relax() asm volatile("rep; nop" ::: "memory"); diff --git a/tools/perf/util/cache.h b/tools/perf/util/cache.h index 161d5f4..4b50c41 100644 --- a/tools/perf/util/cache.h +++ b/tools/perf/util/cache.h @@ -18,6 +18,7 @@ #define PERFATTRIBUTES_FILE ".perfattributes" #define INFOATTRIBUTES_FILE "info/attributes" #define ATTRIBUTE_MACRO_PREFIX "[attr]" +#define PERF_DEBUGFS_ENVIRONMENT "PERF_DEBUGFS_DIR" typedef int (*config_fn_t)(const char *, const char *, void *); extern int perf_default_config(const char *, const char *, void *); diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h index b5ef53a..bf28044 100644 --- a/tools/perf/util/header.h +++ b/tools/perf/util/header.h @@ -16,7 +16,7 @@ struct perf_header { int frozen; int attrs, size; struct perf_header_attr **attr; - off_t attr_offset; + s64 attr_offset; u64 data_offset; u64 data_size; }; diff --git a/tools/perf/util/include/linux/kernel.h b/tools/perf/util/include/linux/kernel.h index 99c1b3d..a6b8739 100644 --- a/tools/perf/util/include/linux/kernel.h +++ b/tools/perf/util/include/linux/kernel.h @@ -18,4 +18,12 @@ (type *)((char *)__mptr - offsetof(type, member)); }) #endif +#ifndef max +#define max(x, y) ({ \ + typeof(x) _max1 = (x); \ + typeof(y) _max2 = (y); \ + (void) (&_max1 == &_max2); \ + _max1 > _max2 ? _max1 : _max2; }) +#endif + #endif diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 5184959..7bdad8d 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -5,6 +5,7 @@ #include "parse-events.h" #include "exec_cmd.h" #include "string.h" +#include "cache.h" extern char *strcasestr(const char *haystack, const char *needle); @@ -19,6 +20,8 @@ struct event_symbol { char *alias; }; +char debugfs_path[MAXPATHLEN]; + #define CHW(x) .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_##x #define CSW(x) .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_##x @@ -71,8 +74,8 @@ static char *sw_event_names[] = { #define MAX_ALIASES 8 static char *hw_cache[][MAX_ALIASES] = { - { "L1-d$", "l1-d", "l1d", "L1-data", }, - { "L1-i$", "l1-i", "l1i", "L1-instruction", }, + { "L1-dcache", "l1-d", "l1d", "L1-data", }, + { "L1-icache", "l1-i", "l1i", "L1-instruction", }, { "LLC", "L2" }, { "dTLB", "d-tlb", "Data-TLB", }, { "iTLB", "i-tlb", "Instruction-TLB", }, @@ -110,6 +113,88 @@ static unsigned long hw_cache_stat[C(MAX)] = { [C(BPU)] = (CACHE_READ), }; +#define for_each_subsystem(sys_dir, sys_dirent, sys_next, file, st) \ + while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next) \ + if (snprintf(file, MAXPATHLEN, "%s/%s", debugfs_path, \ + sys_dirent.d_name) && \ + (!stat(file, &st)) && (S_ISDIR(st.st_mode)) && \ + (strcmp(sys_dirent.d_name, ".")) && \ + (strcmp(sys_dirent.d_name, ".."))) + +#define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next, file, st) \ + while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next) \ + if (snprintf(file, MAXPATHLEN, "%s/%s/%s", debugfs_path, \ + sys_dirent.d_name, evt_dirent.d_name) && \ + (!stat(file, &st)) && (S_ISDIR(st.st_mode)) && \ + (strcmp(evt_dirent.d_name, ".")) && \ + (strcmp(evt_dirent.d_name, ".."))) + +#define MAX_EVENT_LENGTH 30 + +int valid_debugfs_mount(const char *debugfs) +{ + struct statfs st_fs; + + if (statfs(debugfs, &st_fs) < 0) + return -ENOENT; + else if (st_fs.f_type != (long) DEBUGFS_MAGIC) + return -ENOENT; + return 0; +} + +static char *tracepoint_id_to_name(u64 config) +{ + static char tracepoint_name[2 * MAX_EVENT_LENGTH]; + DIR *sys_dir, *evt_dir; + struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent; + struct stat st; + char id_buf[4]; + int fd; + u64 id; + char evt_path[MAXPATHLEN]; + + if (valid_debugfs_mount(debugfs_path)) + return "unkown"; + + sys_dir = opendir(debugfs_path); + if (!sys_dir) + goto cleanup; + + for_each_subsystem(sys_dir, sys_dirent, sys_next, evt_path, st) { + evt_dir = opendir(evt_path); + if (!evt_dir) + goto cleanup; + for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next, + evt_path, st) { + snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", + debugfs_path, sys_dirent.d_name, + evt_dirent.d_name); + fd = open(evt_path, O_RDONLY); + if (fd < 0) + continue; + if (read(fd, id_buf, sizeof(id_buf)) < 0) { + close(fd); + continue; + } + close(fd); + id = atoll(id_buf); + if (id == config) { + closedir(evt_dir); + closedir(sys_dir); + snprintf(tracepoint_name, 2 * MAX_EVENT_LENGTH, + "%s:%s", sys_dirent.d_name, + evt_dirent.d_name); + return tracepoint_name; + } + } + closedir(evt_dir); + } + +cleanup: + closedir(sys_dir); + return "unkown"; +} + static int is_cache_op_valid(u8 cache_type, u8 cache_op) { if (hw_cache_stat[cache_type] & COP(cache_op)) @@ -177,6 +262,9 @@ char *event_name(int counter) return sw_event_names[config]; return "unknown-software"; + case PERF_TYPE_TRACEPOINT: + return tracepoint_id_to_name(config); + default: break; } @@ -265,6 +353,53 @@ parse_generic_hw_event(const char **str, struct perf_counter_attr *attr) return 1; } +static int parse_tracepoint_event(const char **strp, + struct perf_counter_attr *attr) +{ + const char *evt_name; + char sys_name[MAX_EVENT_LENGTH]; + char id_buf[4]; + int fd; + unsigned int sys_length, evt_length; + u64 id; + char evt_path[MAXPATHLEN]; + + if (valid_debugfs_mount(debugfs_path)) + return 0; + + evt_name = strchr(*strp, ':'); + if (!evt_name) + return 0; + + sys_length = evt_name - *strp; + if (sys_length >= MAX_EVENT_LENGTH) + return 0; + + strncpy(sys_name, *strp, sys_length); + sys_name[sys_length] = '\0'; + evt_name = evt_name + 1; + evt_length = strlen(evt_name); + if (evt_length >= MAX_EVENT_LENGTH) + return 0; + + snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path, + sys_name, evt_name); + fd = open(evt_path, O_RDONLY); + if (fd < 0) + return 0; + + if (read(fd, id_buf, sizeof(id_buf)) < 0) { + close(fd); + return 0; + } + close(fd); + id = atoll(id_buf); + attr->config = id; + attr->type = PERF_TYPE_TRACEPOINT; + *strp = evt_name + evt_length; + return 1; +} + static int check_events(const char *str, unsigned int i) { int n; @@ -374,7 +509,8 @@ parse_event_modifier(const char **strp, struct perf_counter_attr *attr) */ static int parse_event_symbols(const char **str, struct perf_counter_attr *attr) { - if (!(parse_raw_event(str, attr) || + if (!(parse_tracepoint_event(str, attr) || + parse_raw_event(str, attr) || parse_numeric_event(str, attr) || parse_symbolic_event(str, attr) || parse_generic_hw_event(str, attr))) @@ -423,6 +559,42 @@ static const char * const event_type_descriptors[] = { }; /* + * Print the events from <debugfs_mount_point>/tracing/events + */ + +static void print_tracepoint_events(void) +{ + DIR *sys_dir, *evt_dir; + struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent; + struct stat st; + char evt_path[MAXPATHLEN]; + + if (valid_debugfs_mount(debugfs_path)) + return; + + sys_dir = opendir(debugfs_path); + if (!sys_dir) + goto cleanup; + + for_each_subsystem(sys_dir, sys_dirent, sys_next, evt_path, st) { + evt_dir = opendir(evt_path); + if (!evt_dir) + goto cleanup; + for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next, + evt_path, st) { + snprintf(evt_path, MAXPATHLEN, "%s:%s", + sys_dirent.d_name, evt_dirent.d_name); + fprintf(stderr, " %-40s [%s]\n", evt_path, + event_type_descriptors[PERF_TYPE_TRACEPOINT+1]); + } + closedir(evt_dir); + } + +cleanup: + closedir(sys_dir); +} + +/* * Print the help text for the event symbols: */ void print_events(void) @@ -436,7 +608,7 @@ void print_events(void) for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) { type = syms->type + 1; - if (type > ARRAY_SIZE(event_type_descriptors)) + if (type >= ARRAY_SIZE(event_type_descriptors)) type = 0; if (type != prev_type) @@ -472,5 +644,7 @@ void print_events(void) "rNNN"); fprintf(stderr, "\n"); + print_tracepoint_events(); + exit(129); } diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h index e3d5529..1ea5d09 100644 --- a/tools/perf/util/parse-events.h +++ b/tools/perf/util/parse-events.h @@ -3,6 +3,8 @@ * Parse symbolic events/counts passed in as options: */ +struct option; + extern int nr_counters; extern struct perf_counter_attr attrs[MAX_COUNTERS]; @@ -15,3 +17,6 @@ extern int parse_events(const struct option *opt, const char *str, int unset); extern void print_events(void); +extern char debugfs_path[]; +extern int valid_debugfs_mount(const char *debugfs); + diff --git a/tools/perf/util/string.h b/tools/perf/util/string.h index 3dca2f6..bf39dfa 100644 --- a/tools/perf/util/string.h +++ b/tools/perf/util/string.h @@ -5,4 +5,7 @@ int hex2u64(const char *ptr, u64 *val); +#define _STR(x) #x +#define STR(x) _STR(x) + #endif diff --git a/tools/perf/util/strlist.c b/tools/perf/util/strlist.c index 025a78e..7ad3817 100644 --- a/tools/perf/util/strlist.c +++ b/tools/perf/util/strlist.c @@ -64,6 +64,7 @@ int strlist__add(struct strlist *self, const char *new_entry) rb_link_node(&sn->rb_node, parent, p); rb_insert_color(&sn->rb_node, &self->entries); + ++self->nr_entries; return 0; } @@ -155,8 +156,9 @@ struct strlist *strlist__new(bool dupstr, const char *slist) struct strlist *self = malloc(sizeof(*self)); if (self != NULL) { - self->entries = RB_ROOT; - self->dupstr = dupstr; + self->entries = RB_ROOT; + self->dupstr = dupstr; + self->nr_entries = 0; if (slist && strlist__parse_list(self, slist) != 0) goto out_error; } @@ -182,3 +184,17 @@ void strlist__delete(struct strlist *self) free(self); } } + +struct str_node *strlist__entry(const struct strlist *self, unsigned int idx) +{ + struct rb_node *nd; + + for (nd = rb_first(&self->entries); nd; nd = rb_next(nd)) { + struct str_node *pos = rb_entry(nd, struct str_node, rb_node); + + if (!idx--) + return pos; + } + + return NULL; +} diff --git a/tools/perf/util/strlist.h b/tools/perf/util/strlist.h index 2fdcfee..921818e 100644 --- a/tools/perf/util/strlist.h +++ b/tools/perf/util/strlist.h @@ -11,7 +11,8 @@ struct str_node { struct strlist { struct rb_root entries; - bool dupstr; + unsigned int nr_entries; + bool dupstr; }; struct strlist *strlist__new(bool dupstr, const char *slist); @@ -21,11 +22,17 @@ void strlist__remove(struct strlist *self, struct str_node *sn); int strlist__load(struct strlist *self, const char *filename); int strlist__add(struct strlist *self, const char *str); +struct str_node *strlist__entry(const struct strlist *self, unsigned int idx); bool strlist__has_entry(struct strlist *self, const char *entry); static inline bool strlist__empty(const struct strlist *self) { - return rb_first(&self->entries) == NULL; + return self->nr_entries == 0; +} + +static inline unsigned int strlist__nr_entries(const struct strlist *self) +{ + return self->nr_entries; } int strlist__parse_list(struct strlist *self, const char *s); diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 4683b67..2810605 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -6,9 +6,15 @@ #include <libelf.h> #include <gelf.h> #include <elf.h> +#include <bfd.h> const char *sym_hist_filter; +#ifndef DMGL_PARAMS +#define DMGL_PARAMS (1 << 0) /* Include function args */ +#define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */ +#endif + static struct symbol *symbol__new(u64 start, u64 len, const char *name, unsigned int priv_size, u64 obj_start, int verbose) @@ -65,6 +71,7 @@ struct dso *dso__new(const char *name, unsigned int sym_priv_size) self->syms = RB_ROOT; self->sym_priv_size = sym_priv_size; self->find_symbol = dso__find_symbol; + self->slen_calculated = 0; } return self; @@ -373,36 +380,61 @@ static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, idx < nr_entries; \ ++idx, pos = gelf_getrela(reldata, idx, &pos_mem)) -static int dso__synthesize_plt_symbols(struct dso *self, Elf *elf, - GElf_Ehdr *ehdr, Elf_Scn *scn_dynsym, - GElf_Shdr *shdr_dynsym, - size_t dynsym_idx, int verbose) +/* + * We need to check if we have a .dynsym, so that we can handle the + * .plt, synthesizing its symbols, that aren't on the symtabs (be it + * .dynsym or .symtab). + * 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) { uint32_t nr_rel_entries, idx; GElf_Sym sym; u64 plt_offset; GElf_Shdr shdr_plt; struct symbol *f; - GElf_Shdr shdr_rel_plt; + GElf_Shdr shdr_rel_plt, shdr_dynsym; Elf_Data *reldata, *syms, *symstrs; - Elf_Scn *scn_plt_rel, *scn_symstrs; + Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym; + size_t dynsym_idx; + GElf_Ehdr ehdr; char sympltname[1024]; - int nr = 0, symidx; + Elf *elf; + int nr = 0, symidx, fd, err = 0; + + fd = open(self->name, O_RDONLY); + if (fd < 0) + goto out; + + elf = elf_begin(fd, ELF_C_READ_MMAP, NULL); + if (elf == NULL) + goto out_close; + + if (gelf_getehdr(elf, &ehdr) == NULL) + goto out_elf_end; + + scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym, + ".dynsym", &dynsym_idx); + if (scn_dynsym == NULL) + goto out_elf_end; - scn_plt_rel = elf_section_by_name(elf, ehdr, &shdr_rel_plt, + scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, ".rela.plt", NULL); if (scn_plt_rel == NULL) { - scn_plt_rel = elf_section_by_name(elf, ehdr, &shdr_rel_plt, + scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, ".rel.plt", NULL); if (scn_plt_rel == NULL) - return 0; + goto out_elf_end; } + err = -1; + if (shdr_rel_plt.sh_link != dynsym_idx) - return 0; + goto out_elf_end; - if (elf_section_by_name(elf, ehdr, &shdr_plt, ".plt", NULL) == NULL) - return 0; + if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL) + goto out_elf_end; /* * Fetch the relocation section to find the indexes to the GOT @@ -410,19 +442,19 @@ static int dso__synthesize_plt_symbols(struct dso *self, Elf *elf, */ reldata = elf_getdata(scn_plt_rel, NULL); if (reldata == NULL) - return -1; + goto out_elf_end; syms = elf_getdata(scn_dynsym, NULL); if (syms == NULL) - return -1; + goto out_elf_end; - scn_symstrs = elf_getscn(elf, shdr_dynsym->sh_link); + scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link); if (scn_symstrs == NULL) - return -1; + goto out_elf_end; symstrs = elf_getdata(scn_symstrs, NULL); if (symstrs == NULL) - return -1; + goto out_elf_end; nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; plt_offset = shdr_plt.sh_offset; @@ -441,7 +473,7 @@ static int dso__synthesize_plt_symbols(struct dso *self, Elf *elf, f = symbol__new(plt_offset, shdr_plt.sh_entsize, sympltname, self->sym_priv_size, 0, verbose); if (!f) - return -1; + goto out_elf_end; dso__insert_symbol(self, f); ++nr; @@ -459,19 +491,25 @@ static int dso__synthesize_plt_symbols(struct dso *self, Elf *elf, f = symbol__new(plt_offset, shdr_plt.sh_entsize, sympltname, self->sym_priv_size, 0, verbose); if (!f) - return -1; + goto out_elf_end; dso__insert_symbol(self, f); ++nr; } - } else { - /* - * TODO: There are still one more shdr_rel_plt.sh_type - * I have to investigate, but probably should be ignored. - */ } - return nr; + err = 0; +out_elf_end: + elf_end(elf); +out_close: + close(fd); + + if (err == 0) + return nr; +out: + fprintf(stderr, "%s: problems reading %s PLT info.\n", + __func__, self->name); + return 0; } static int dso__load_sym(struct dso *self, int fd, const char *name, @@ -485,10 +523,9 @@ static int dso__load_sym(struct dso *self, int fd, const char *name, GElf_Shdr shdr; Elf_Data *syms; GElf_Sym sym; - Elf_Scn *sec, *sec_dynsym, *sec_strndx; + Elf_Scn *sec, *sec_strndx; Elf *elf; - size_t dynsym_idx; - int nr = 0; + int nr = 0, kernel = !strcmp("[kernel]", self->name); elf = elf_begin(fd, ELF_C_READ_MMAP, NULL); if (elf == NULL) { @@ -504,32 +541,11 @@ static int dso__load_sym(struct dso *self, int fd, const char *name, goto out_elf_end; } - /* - * We need to check if we have a .dynsym, so that we can handle the - * .plt, synthesizing its symbols, that aren't on the symtabs (be it - * .dynsym or .symtab) - */ - sec_dynsym = elf_section_by_name(elf, &ehdr, &shdr, - ".dynsym", &dynsym_idx); - if (sec_dynsym != NULL) { - nr = dso__synthesize_plt_symbols(self, elf, &ehdr, - sec_dynsym, &shdr, - dynsym_idx, verbose); - if (nr < 0) - goto out_elf_end; - } - - /* - * But if we have a full .symtab (that is a superset of .dynsym) we - * should add the symbols not in the .dynsyn - */ sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL); if (sec == NULL) { - if (sec_dynsym == NULL) + sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL); + if (sec == NULL) goto out_elf_end; - - sec = sec_dynsym; - gelf_getshdr(sec, &shdr); } syms = elf_getdata(sec, NULL); @@ -555,12 +571,17 @@ static int dso__load_sym(struct dso *self, int fd, const char *name, nr_syms = shdr.sh_size / shdr.sh_entsize; memset(&sym, 0, sizeof(sym)); - self->adjust_symbols = (ehdr.e_type == ET_EXEC || + if (!kernel) { + self->adjust_symbols = (ehdr.e_type == ET_EXEC || elf_section_by_name(elf, &ehdr, &shdr, ".gnu.prelink_undo", NULL) != NULL); + } else self->adjust_symbols = 0; + elf_symtab__for_each_symbol(syms, nr_syms, index, sym) { struct symbol *f; + const char *name; + char *demangled; u64 obj_start; struct section *section = NULL; int is_label = elf_sym__is_label(&sym); @@ -599,10 +620,19 @@ static int dso__load_sym(struct dso *self, int fd, const char *name, goto out_elf_end; } } + /* + * 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... + */ + name = elf_sym__name(&sym, symstrs); + demangled = bfd_demangle(NULL, name, DMGL_PARAMS | DMGL_ANSI); + if (demangled != NULL) + name = demangled; - f = symbol__new(sym.st_value, sym.st_size, - elf_sym__name(&sym, symstrs), + f = symbol__new(sym.st_value, sym.st_size, name, self->sym_priv_size, obj_start, verbose); + free(demangled); if (!f) goto out_elf_end; @@ -668,6 +698,11 @@ more: if (!ret) goto more; + if (ret > 0) { + int nr_plt = dso__synthesize_plt_symbols(self, verbose); + if (nr_plt > 0) + ret += nr_plt; + } out: free(name); return ret; diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h index 7918cff..2f92b21 100644 --- a/tools/perf/util/symbol.h +++ b/tools/perf/util/symbol.h @@ -25,6 +25,7 @@ struct dso { struct symbol *(*find_symbol)(struct dso *, u64 ip); unsigned int sym_priv_size; unsigned char adjust_symbols; + unsigned char slen_calculated; char name[0]; }; diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h index b4be607..68fe157 100644 --- a/tools/perf/util/util.h +++ b/tools/perf/util/util.h @@ -50,6 +50,7 @@ #include <unistd.h> #include <stdio.h> #include <sys/stat.h> +#include <sys/statfs.h> #include <fcntl.h> #include <stddef.h> #include <stdlib.h> @@ -80,6 +81,7 @@ #include <netdb.h> #include <pwd.h> #include <inttypes.h> +#include "../../../include/linux/magic.h" #ifndef NO_ICONV #include <iconv.h> |