diff options
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/Documentation/perf-probe.txt | 8 | ||||
| -rw-r--r-- | tools/perf/builtin-probe.c | 43 |
2 files changed, 46 insertions, 5 deletions
diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt index fb673be..b715cb7 100644 --- a/tools/perf/Documentation/perf-probe.txt +++ b/tools/perf/Documentation/perf-probe.txt @@ -104,6 +104,10 @@ OPTIONS Specify path to the executable or shared library file for user space tracing. Can also be used with --funcs option. +In absence of -m/-x options, perf probe checks if the first argument after +the options is an absolute path name. If its an absolute path, perf probe +uses it as a target module/target user space binary to probe. + PROBE SYNTAX ------------ Probe points are defined by following syntax. @@ -190,11 +194,11 @@ Delete all probes on schedule(). Add probes at zfree() function on /bin/zsh - ./perf probe -x /bin/zsh zfree + ./perf probe -x /bin/zsh zfree or ./perf probe /bin/zsh zfree Add probes at malloc() function on libc - ./perf probe -x /lib/libc.so.6 malloc + ./perf probe -x /lib/libc.so.6 malloc or ./perf probe /lib/libc.so.6 malloc SEE ALSO -------- diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c index ee3d84a..e215ae6 100644 --- a/tools/perf/builtin-probe.c +++ b/tools/perf/builtin-probe.c @@ -85,21 +85,58 @@ static int parse_probe_event(const char *str) return ret; } +static int set_target(const char *ptr) +{ + int found = 0; + const char *buf; + + /* + * The first argument after options can be an absolute path + * to an executable / library or kernel module. + * + * TODO: Support relative path, and $PATH, $LD_LIBRARY_PATH, + * short module name. + */ + if (!params.target && ptr && *ptr == '/') { + params.target = ptr; + found = 1; + buf = ptr + (strlen(ptr) - 3); + + if (strcmp(buf, ".ko")) + params.uprobes = true; + + } + + return found; +} + static int parse_probe_event_argv(int argc, const char **argv) { - int i, len, ret; + int i, len, ret, found_target; char *buf; + found_target = set_target(argv[0]); + if (found_target && argc == 1) + return 0; + /* Bind up rest arguments */ len = 0; - for (i = 0; i < argc; i++) + for (i = 0; i < argc; i++) { + if (i == 0 && found_target) + continue; + len += strlen(argv[i]) + 1; + } buf = zalloc(len + 1); if (buf == NULL) return -ENOMEM; len = 0; - for (i = 0; i < argc; i++) + for (i = 0; i < argc; i++) { + if (i == 0 && found_target) + continue; + len += sprintf(&buf[len], "%s ", argv[i]); + } params.mod_events = true; ret = parse_probe_event(buf); free(buf); |