diff options
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/Documentation/perf-inject.txt | 7 | ||||
| -rw-r--r-- | tools/perf/builtin-inject.c | 85 |
2 files changed, 91 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-inject.txt b/tools/perf/Documentation/perf-inject.txt index ffc293fdf61d..70e2ac3cc91a 100644 --- a/tools/perf/Documentation/perf-inject.txt +++ b/tools/perf/Documentation/perf-inject.txt @@ -27,9 +27,14 @@ OPTIONS --build-ids:: Inject build-ids into the output stream ---buildid-all: +--buildid-all:: Inject build-ids of all DSOs into the output stream +--known-build-ids=:: + Override build-ids to inject using these comma-separated pairs of + build-id and path. Understands file://filename to read these pairs + from a file, which can be generated with perf buildid-list. + -v:: --verbose:: Be more verbose. diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c index 2a0f992ca0be..8ec955402488 100644 --- a/tools/perf/builtin-inject.c +++ b/tools/perf/builtin-inject.c @@ -21,6 +21,7 @@ #include "util/data.h" #include "util/auxtrace.h" #include "util/jit.h" +#include "util/string2.h" #include "util/symbol.h" #include "util/synthetic-events.h" #include "util/thread.h" @@ -38,6 +39,7 @@ #include <linux/string.h> #include <linux/zalloc.h> #include <linux/hash.h> +#include <ctype.h> #include <errno.h> #include <signal.h> #include <inttypes.h> @@ -123,6 +125,7 @@ struct perf_inject { char event_copy[PERF_SAMPLE_MAX_SIZE]; struct perf_file_section secs[HEADER_FEAT_BITS]; struct guest_session guest_session; + struct strlist *known_build_ids; }; struct event_entry { @@ -634,9 +637,73 @@ static int dso__read_build_id(struct dso *dso) return dso->has_build_id ? 0 : -1; } +static struct strlist *perf_inject__parse_known_build_ids( + const char *known_build_ids_string) +{ + struct str_node *pos, *tmp; + struct strlist *known_build_ids; + int bid_len; + + known_build_ids = strlist__new(known_build_ids_string, NULL); + if (known_build_ids == NULL) + return NULL; + strlist__for_each_entry_safe(pos, tmp, known_build_ids) { + const char *build_id, *dso_name; + + build_id = skip_spaces(pos->s); + dso_name = strchr(build_id, ' '); + if (dso_name == NULL) { + strlist__remove(known_build_ids, pos); + continue; + } + bid_len = dso_name - pos->s; + dso_name = skip_spaces(dso_name); + if (bid_len % 2 != 0 || bid_len >= SBUILD_ID_SIZE) { + strlist__remove(known_build_ids, pos); + continue; + } + for (int ix = 0; 2 * ix + 1 < bid_len; ++ix) { + if (!isxdigit(build_id[2 * ix]) || + !isxdigit(build_id[2 * ix + 1])) { + strlist__remove(known_build_ids, pos); + break; + } + } + } + return known_build_ids; +} + +static bool perf_inject__lookup_known_build_id(struct perf_inject *inject, + struct dso *dso) +{ + struct str_node *pos; + int bid_len; + + strlist__for_each_entry(pos, inject->known_build_ids) { + const char *build_id, *dso_name; + + build_id = skip_spaces(pos->s); + dso_name = strchr(build_id, ' '); + bid_len = dso_name - pos->s; + dso_name = skip_spaces(dso_name); + if (strcmp(dso->long_name, dso_name)) + continue; + for (int ix = 0; 2 * ix + 1 < bid_len; ++ix) { + dso->bid.data[ix] = (hex(build_id[2 * ix]) << 4 | + hex(build_id[2 * ix + 1])); + } + dso->bid.size = bid_len / 2; + dso->has_build_id = 1; + return true; + } + return false; +} + static int dso__inject_build_id(struct dso *dso, struct perf_tool *tool, struct machine *machine, u8 cpumode, u32 flags) { + struct perf_inject *inject = container_of(tool, struct perf_inject, + tool); int err; if (is_anon_memory(dso->long_name) || flags & MAP_HUGETLB) @@ -644,6 +711,10 @@ static int dso__inject_build_id(struct dso *dso, struct perf_tool *tool, if (is_no_dso_memory(dso->long_name)) return 0; + if (inject->known_build_ids != NULL && + perf_inject__lookup_known_build_id(inject, dso)) + return 1; + if (dso__read_build_id(dso) < 0) { pr_debug("no build_id found for %s\n", dso->long_name); return -1; @@ -2112,12 +2183,16 @@ int cmd_inject(int argc, const char **argv) }; int ret; bool repipe = true; + const char *known_build_ids = NULL; struct option options[] = { OPT_BOOLEAN('b', "build-ids", &inject.build_ids, "Inject build-ids into the output stream"), OPT_BOOLEAN(0, "buildid-all", &inject.build_id_all, "Inject build-ids of all DSOs into the output stream"), + OPT_STRING(0, "known-build-ids", &known_build_ids, + "buildid path [,buildid path...]", + "build-ids to use for given paths"), OPT_STRING('i', "input", &inject.input_name, "file", "input file name"), OPT_STRING('o', "output", &inject.output.path, "file", @@ -2257,6 +2332,15 @@ int cmd_inject(int argc, const char **argv) */ inject.tool.ordered_events = true; inject.tool.ordering_requires_timestamps = true; + if (known_build_ids != NULL) { + inject.known_build_ids = + perf_inject__parse_known_build_ids(known_build_ids); + + if (inject.known_build_ids == NULL) { + pr_err("Couldn't parse known build ids.\n"); + goto out_delete; + } + } } if (inject.sched_stat) { @@ -2285,6 +2369,7 @@ int cmd_inject(int argc, const char **argv) guest_session__exit(&inject.guest_session); out_delete: + strlist__delete(inject.known_build_ids); zstd_fini(&(inject.session->zstd_data)); perf_session__delete(inject.session); out_close_output: |