Adding --buildid-mmap option to enable build id in mmap2 events. It will only work if there's kernel support for that and it disables build id cache (implies --no-buildid).
It's also possible to enable it permanently via config option in ~.perfconfig file: [record] build-id=mmap Also added build_id bit in the verbose output for perf_event_attr: # perf record --buildid-mmap -vv ... perf_event_attr: type 1 size 120 ... build_id 1 Adding also missing text_poke bit. Signed-off-by: Jiri Olsa <jo...@kernel.org> --- tools/perf/Documentation/perf-config.txt | 3 ++- tools/perf/Documentation/perf-record.txt | 3 +++ tools/perf/builtin-record.c | 20 ++++++++++++++++++++ tools/perf/util/evsel.c | 10 ++++++---- tools/perf/util/perf_api_probe.c | 10 ++++++++++ tools/perf/util/perf_api_probe.h | 1 + tools/perf/util/perf_event_attr_fprintf.c | 2 ++ tools/perf/util/record.h | 1 + 8 files changed, 45 insertions(+), 5 deletions(-) diff --git a/tools/perf/Documentation/perf-config.txt b/tools/perf/Documentation/perf-config.txt index 15fad32b9885..66a697ed9655 100644 --- a/tools/perf/Documentation/perf-config.txt +++ b/tools/perf/Documentation/perf-config.txt @@ -559,11 +559,12 @@ kmem.*:: record.*:: record.build-id:: - This option can be 'cache', 'no-cache' or 'skip'. + This option can be 'cache', 'no-cache', 'skip' or 'mmap'. 'cache' is to post-process data and save/update the binaries into the build-id cache (in ~/.debug). This is the default. But if this option is 'no-cache', it will not update the build-id cache. 'skip' skips post-processing and does not update the cache. + 'mmap' skips post-processing and reads build-ids from MMAP events. record.call-graph:: This is identical to 'call-graph.record-mode', except it is diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 768888b9326a..1bcf51e24979 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -482,6 +482,9 @@ Specify vmlinux path which has debuginfo. --buildid-all:: Record build-id of all DSOs regardless whether it's actually hit or not. +--buildid-mmap:: +Record build ids in mmap2 events, disables build id cache (implies --no-buildid). + --aio[=n]:: Use <n> control blocks in asynchronous (Posix AIO) trace writing mode (default: 1, max: 4). Asynchronous mode is supported only when linking Perf tool with libc library diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index adf311d15d3d..47bae9d82d43 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -102,6 +102,7 @@ struct record { bool no_buildid_cache; bool no_buildid_cache_set; bool buildid_all; + bool buildid_mmap; bool timestamp_filename; bool timestamp_boundary; struct switch_output switch_output; @@ -2139,6 +2140,8 @@ static int perf_record_config(const char *var, const char *value, void *cb) rec->no_buildid_cache = true; else if (!strcmp(value, "skip")) rec->no_buildid = true; + else if (!strcmp(value, "mmap")) + rec->buildid_mmap = true; else return -1; return 0; @@ -2554,6 +2557,8 @@ static struct option __record_options[] = { "file", "vmlinux pathname"), OPT_BOOLEAN(0, "buildid-all", &record.buildid_all, "Record build-id of all DSOs regardless of hits"), + OPT_BOOLEAN(0, "buildid-mmap", &record.buildid_mmap, + "Record build-id in map events"), OPT_BOOLEAN(0, "timestamp-filename", &record.timestamp_filename, "append timestamp to output filename"), OPT_BOOLEAN(0, "timestamp-boundary", &record.timestamp_boundary, @@ -2657,6 +2662,21 @@ int cmd_record(int argc, const char **argv) } + if (rec->buildid_mmap) { + if (!perf_can_record_build_id()) { + pr_err("Failed: no support to record build id in mmap events, update your kernel.\n"); + err = -EINVAL; + goto out_opts; + } + pr_debug("Enabling build id in mmap2 events.\n"); + /* Enable mmap build id synthesizing. */ + symbol_conf.buildid_mmap2 = true; + /* Enable perf_event_attr::build_id bit. */ + rec->opts.build_id = true; + /* Disable build id cache. */ + rec->no_buildid = true; + } + if (rec->opts.kcore) rec->data.is_dir = true; diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 1cad6051d8b0..749d806ee1d1 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -1170,10 +1170,12 @@ void evsel__config(struct evsel *evsel, struct record_opts *opts, if (opts->sample_weight) evsel__set_sample_bit(evsel, WEIGHT); - attr->task = track; - attr->mmap = track; - attr->mmap2 = track && !perf_missing_features.mmap2; - attr->comm = track; + attr->task = track; + attr->mmap = track; + attr->mmap2 = track && !perf_missing_features.mmap2; + attr->comm = track; + attr->build_id = track && opts->build_id; + /* * ksymbol is tracked separately with text poke because it needs to be * system wide and enabled immediately. diff --git a/tools/perf/util/perf_api_probe.c b/tools/perf/util/perf_api_probe.c index 3840d02f0f7b..829af17a0867 100644 --- a/tools/perf/util/perf_api_probe.c +++ b/tools/perf/util/perf_api_probe.c @@ -98,6 +98,11 @@ static void perf_probe_text_poke(struct evsel *evsel) evsel->core.attr.text_poke = 1; } +static void perf_probe_build_id(struct evsel *evsel) +{ + evsel->core.attr.build_id = 1; +} + bool perf_can_sample_identifier(void) { return perf_probe_api(perf_probe_sample_identifier); @@ -172,3 +177,8 @@ bool perf_can_aux_sample(void) return true; } + +bool perf_can_record_build_id(void) +{ + return perf_probe_api(perf_probe_build_id); +} diff --git a/tools/perf/util/perf_api_probe.h b/tools/perf/util/perf_api_probe.h index d5506a983a94..f12ca55f509a 100644 --- a/tools/perf/util/perf_api_probe.h +++ b/tools/perf/util/perf_api_probe.h @@ -11,5 +11,6 @@ bool perf_can_record_cpu_wide(void); bool perf_can_record_switch_events(void); bool perf_can_record_text_poke_events(void); bool perf_can_sample_identifier(void); +bool perf_can_record_build_id(void); #endif // __PERF_API_PROBE_H diff --git a/tools/perf/util/perf_event_attr_fprintf.c b/tools/perf/util/perf_event_attr_fprintf.c index e67a227c0ce7..656a7fddfc26 100644 --- a/tools/perf/util/perf_event_attr_fprintf.c +++ b/tools/perf/util/perf_event_attr_fprintf.c @@ -134,6 +134,8 @@ int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr, PRINT_ATTRf(bpf_event, p_unsigned); PRINT_ATTRf(aux_output, p_unsigned); PRINT_ATTRf(cgroup, p_unsigned); + PRINT_ATTRf(text_poke, p_unsigned); + PRINT_ATTRf(build_id, p_unsigned); PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events, p_unsigned); PRINT_ATTRf(bp_type, p_unsigned); diff --git a/tools/perf/util/record.h b/tools/perf/util/record.h index 266760ac9143..609e706f4282 100644 --- a/tools/perf/util/record.h +++ b/tools/perf/util/record.h @@ -49,6 +49,7 @@ struct record_opts { bool no_bpf_event; bool kcore; bool text_poke; + bool build_id; unsigned int freq; unsigned int mmap_pages; unsigned int auxtrace_mmap_pages; -- 2.26.2