From b36f19d572151abb987ce308a3e066b977a2146f Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Thu, 20 May 2010 12:15:33 -0300 Subject: perf annotate: Use build-ids to find the right DSO MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit We were still using the pathname found on the MMAP event, that could not be the one we used when recording, so use the build-id cache for that, only falling back to use the pathname in the MMAP event if no build-ids are available. With this we now also are able to do secure, seamless offline annotation. Example: [root@doppio linux-2.6-tip]# perf report -g none -v 2> /dev/null | head -10 8.12% Xorg /usr/lib64/libpixman-1.so.0.14.0 0x0000000000026d02 B [.] pixman_rasterize_edges 4.68% firefox /usr/lib64/xulrunner-1.9.1/libxul.so 0x00000000005dbdba B [.] 0x000000005dbdba 3.70% swapper /lib/modules/2.6.34-rc6/build/vmlinux 0xffffffff81022cea ! [k] read_hpet 2.96% init /lib/modules/2.6.34-rc6/build/vmlinux 0xffffffff81022cea ! [k] read_hpet 2.73% swapper /lib/modules/2.6.34-rc6/build/vmlinux 0xffffffff8100a738 ! [k] mwait_idle_with_hints [root@doppio linux-2.6-tip]# perf annotate -v pixman_rasterize_edges 2>&1 | grep Executing Executing: objdump --start-address=0x000000371ce26670 --stop-address=0x000000371ce2709f -dS /root/.debug/.build-id/bd/6ac5199137aaeb279f864717d8d061477466c1|grep -v /root/.debug/.build-id/bd/6ac5199137aaeb279f864717d8d061477466c1|expand [root@doppio linux-2.6-tip]# perf buildid-list | grep libpixman-1.so.0.14.0 bd6ac5199137aaeb279f864717d8d061477466c1 /usr/lib64/libpixman-1.so.0.14.0 [root@doppio linux-2.6-tip]# Reported-by: Stephane Eranian Cc: Frédéric Weisbecker Cc: Mike Galbraith Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Tom Zanussi LKML-Reference: Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/build-id.c | 22 ++++++++++++++++++++++ tools/perf/util/build-id.h | 2 ++ tools/perf/util/callchain.c | 1 + tools/perf/util/callchain.h | 1 - tools/perf/util/hist.c | 34 ++++++++++++++++++++++++++-------- tools/perf/util/symbol.c | 12 +++--------- 6 files changed, 54 insertions(+), 18 deletions(-) diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c index 0f60a3906808..70c5cf87d020 100644 --- a/tools/perf/util/build-id.c +++ b/tools/perf/util/build-id.c @@ -6,6 +6,8 @@ * Copyright (C) 2009, 2010 Red Hat Inc. * Copyright (C) 2009, 2010 Arnaldo Carvalho de Melo */ +#include "util.h" +#include #include "build-id.h" #include "event.h" #include "symbol.h" @@ -37,3 +39,23 @@ struct perf_event_ops build_id__mark_dso_hit_ops = { .mmap = event__process_mmap, .fork = event__process_task, }; + +char *dso__build_id_filename(struct dso *self, char *bf, size_t size) +{ + char build_id_hex[BUILD_ID_SIZE * 2 + 1]; + const char *home; + + if (!self->has_build_id) + return NULL; + + build_id__sprintf(self->build_id, sizeof(self->build_id), build_id_hex); + home = getenv("HOME"); + if (bf == NULL) { + if (asprintf(&bf, "%s/%s/.build-id/%.2s/%s", home, + DEBUG_CACHE_DIR, build_id_hex, build_id_hex + 2) < 0) + return NULL; + } else + snprintf(bf, size, "%s/%s/.build-id/%.2s/%s", home, + DEBUG_CACHE_DIR, build_id_hex, build_id_hex + 2); + return bf; +} diff --git a/tools/perf/util/build-id.h b/tools/perf/util/build-id.h index 1d981d63cf9a..5dafb00eaa06 100644 --- a/tools/perf/util/build-id.h +++ b/tools/perf/util/build-id.h @@ -5,4 +5,6 @@ extern struct perf_event_ops build_id__mark_dso_hit_ops; +char *dso__build_id_filename(struct dso *self, char *bf, size_t size); + #endif diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c index 21a52e0a4435..62b69ad4aa73 100644 --- a/tools/perf/util/callchain.c +++ b/tools/perf/util/callchain.c @@ -15,6 +15,7 @@ #include #include +#include "util.h" #include "callchain.h" bool ip_callchain__valid(struct ip_callchain *chain, event_t *event) diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h index 1cba1f5504e7..1ca73e4a2723 100644 --- a/tools/perf/util/callchain.h +++ b/tools/perf/util/callchain.h @@ -5,7 +5,6 @@ #include #include #include "event.h" -#include "util.h" #include "symbol.h" enum chain_mode { diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c index 9a71c94f057a..739c39fd0ade 100644 --- a/tools/perf/util/hist.c +++ b/tools/perf/util/hist.c @@ -1,3 +1,4 @@ +#include "build-id.h" #include "util.h" #include "hist.h" #include "session.h" @@ -988,22 +989,35 @@ int hist_entry__annotate(struct hist_entry *self, struct list_head *head) struct symbol *sym = self->ms.sym; struct map *map = self->ms.map; struct dso *dso = map->dso; - const char *filename = dso->long_name; + char *filename = dso__build_id_filename(dso, NULL, 0); char command[PATH_MAX * 2]; FILE *file; + int err = -1; u64 len; - if (!filename) - return -1; + if (filename == NULL) { + if (dso->has_build_id) { + pr_err("Can't annotate %s: not enough memory\n", + sym->name); + return -1; + } + /* + * If we don't have build-ids, well, lets hope that this + * DSO is the same as when 'perf record' ran. + */ + filename = dso->long_name; + } if (dso->origin == DSO__ORIG_KERNEL) { - if (dso->annotate_warned) - return 0; + if (dso->annotate_warned) { + err = 0; + goto out_free_filename; + } dso->annotate_warned = 1; pr_err("Can't annotate %s: No vmlinux file was found in the " "path:\n", sym->name); vmlinux_path__fprintf(stderr); - return -1; + goto out_free_filename; } pr_debug("%s: filename=%s, sym=%s, start=%#Lx, end=%#Lx\n", __func__, @@ -1025,14 +1039,18 @@ int hist_entry__annotate(struct hist_entry *self, struct list_head *head) file = popen(command, "r"); if (!file) - return -1; + goto out_free_filename; while (!feof(file)) if (hist_entry__parse_objdump_line(self, file, head) < 0) break; pclose(file); - return 0; + err = 0; +out_free_filename: + if (dso->has_build_id) + free(filename); + return err; } void hists__inc_nr_events(struct hists *self, u32 type) diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 96bff0e54863..aaa51ba147df 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -11,6 +11,7 @@ #include #include #include +#include "build-id.h" #include "symbol.h" #include "strlist.h" @@ -1293,7 +1294,6 @@ int dso__load(struct dso *self, struct map *map, symbol_filter_t filter) int size = PATH_MAX; char *name; u8 build_id[BUILD_ID_SIZE]; - char build_id_hex[BUILD_ID_SIZE * 2 + 1]; int ret = -1; int fd; struct machine *machine; @@ -1325,15 +1325,8 @@ int dso__load(struct dso *self, struct map *map, symbol_filter_t filter) } self->origin = DSO__ORIG_BUILD_ID_CACHE; - - if (self->has_build_id) { - build_id__sprintf(self->build_id, sizeof(self->build_id), - build_id_hex); - snprintf(name, size, "%s/%s/.build-id/%.2s/%s", - getenv("HOME"), DEBUG_CACHE_DIR, - build_id_hex, build_id_hex + 2); + if (dso__build_id_filename(self, name, size) != NULL) goto open_file; - } more: do { self->origin++; @@ -1349,6 +1342,7 @@ more: case DSO__ORIG_BUILDID: 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, -- cgit v1.2.1