diff options
Diffstat (limited to 'tools/perf/util/probe-event.c')
| -rw-r--r-- | tools/perf/util/probe-event.c | 48 |
1 files changed, 44 insertions, 4 deletions
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index 65a1c8252270..076527b639bd 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -429,6 +429,41 @@ static struct debuginfo *open_debuginfo(const char *module, bool silent) return ret; } +/* For caching the last debuginfo */ +static struct debuginfo *debuginfo_cache; +static char *debuginfo_cache_path; + +static struct debuginfo *debuginfo_cache__open(const char *module, bool silent) +{ + if ((debuginfo_cache_path && !strcmp(debuginfo_cache_path, module)) || + (!debuginfo_cache_path && !module && debuginfo_cache)) + goto out; + + /* Copy module path */ + free(debuginfo_cache_path); + if (module) { + debuginfo_cache_path = strdup(module); + if (!debuginfo_cache_path) { + debuginfo__delete(debuginfo_cache); + debuginfo_cache = NULL; + goto out; + } + } + + debuginfo_cache = open_debuginfo(module, silent); + if (!debuginfo_cache) + zfree(&debuginfo_cache_path); +out: + return debuginfo_cache; +} + +static void debuginfo_cache__exit(void) +{ + debuginfo__delete(debuginfo_cache); + debuginfo_cache = NULL; + zfree(&debuginfo_cache_path); +} + static int get_text_start_address(const char *exec, unsigned long *address) { @@ -490,12 +525,11 @@ static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp, pr_debug("try to find information at %" PRIx64 " in %s\n", addr, tp->module ? : "kernel"); - dinfo = open_debuginfo(tp->module, verbose == 0); - if (dinfo) { + dinfo = debuginfo_cache__open(tp->module, verbose == 0); + if (dinfo) ret = debuginfo__find_probe_point(dinfo, (unsigned long)addr, pp); - debuginfo__delete(dinfo); - } else + else ret = -ENOENT; if (ret > 0) { @@ -930,6 +964,10 @@ out: #else /* !HAVE_DWARF_SUPPORT */ +static void debuginfo_cache__exit(void) +{ +} + static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp __maybe_unused, struct perf_probe_point *pp __maybe_unused, @@ -2266,6 +2304,8 @@ next: break; } strlist__delete(rawlist); + /* Cleanup cached debuginfo if needed */ + debuginfo_cache__exit(); return ret; } |