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author | Masami Hiramatsu <mhiramat@redhat.com> | 2009-12-15 16:32:18 +0100 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2009-12-15 20:22:03 +0100 |
commit | af663d75a64d2cc3f18bdb8a29ff4650b9417c16 (patch) | |
tree | fbbad1152eb42f561cc8b186b8bb38aabc1e1d94 /tools/perf/util/probe-event.c | |
parent | perf probe: Add glob matching support on --del (diff) | |
download | linux-af663d75a64d2cc3f18bdb8a29ff4650b9417c16.tar.xz linux-af663d75a64d2cc3f18bdb8a29ff4650b9417c16.zip |
perf probe: Support event name for --add option
Support event name syntax for --add option. This allows
users to specify event name for each new event.
The --add syntax is:
perf probe --add '[EVENT=]SRC:LINE ARGS'
or
perf probe --add '[EVENT=]FUNC[+OFFS|%return|:RLN][@SRC] ARGS'
e.g.
./perf probe --add myprobe1=schedule
Note: currently group name is not supported yet, because it
can cause name-space confliction with other tracepoint/
hw-breakpoint events.
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20091215153218.17436.84675.stgit@dhcp-100-2-132.bos.redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/util/probe-event.c')
-rw-r--r-- | tools/perf/util/probe-event.c | 74 |
1 files changed, 45 insertions, 29 deletions
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index 5e99e52b0179..3b4cf456165c 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -69,10 +69,23 @@ static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp) char c, nc = 0; /* * <Syntax> - * perf probe SRC:LN - * perf probe FUNC[+OFFS|%return][@SRC] + * perf probe [EVENT=]SRC:LN + * perf probe [EVENT=]FUNC[+OFFS|%return][@SRC] + * + * TODO:Group name support */ + ptr = strchr(arg, '='); + if (ptr) { /* Event name */ + *ptr = '\0'; + tmp = ptr + 1; + ptr = strchr(arg, ':'); + if (ptr) /* Group name is not supported yet. */ + semantic_error("Group name is not supported yet."); + pp->event = strdup(arg); + arg = tmp; + } + ptr = strpbrk(arg, ":+@%"); if (ptr) { nc = *ptr; @@ -188,8 +201,7 @@ void parse_perf_probe_event(const char *str, struct probe_point *pp, } /* Parse kprobe_events event into struct probe_point */ -void parse_trace_kprobe_event(const char *str, char **group, char **event, - struct probe_point *pp) +void parse_trace_kprobe_event(const char *str, struct probe_point *pp) { char pr; char *p; @@ -205,18 +217,17 @@ void parse_trace_kprobe_event(const char *str, char **group, char **event, /* Scan event and group name. */ ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]", - &pr, (float *)(void *)group, (float *)(void *)event); + &pr, (float *)(void *)&pp->group, + (float *)(void *)&pp->event); if (ret != 3) semantic_error("Failed to parse event name: %s", argv[0]); - pr_debug("Group:%s Event:%s probe:%c\n", *group, *event, pr); - - if (!pp) - goto end; + pr_debug("Group:%s Event:%s probe:%c\n", pp->group, pp->event, pr); pp->retprobe = (pr == 'r'); /* Scan function name and offset */ - ret = sscanf(argv[1], "%a[^+]+%d", (float *)(void *)&pp->function, &pp->offset); + ret = sscanf(argv[1], "%a[^+]+%d", (float *)(void *)&pp->function, + &pp->offset); if (ret == 1) pp->offset = 0; @@ -235,7 +246,6 @@ void parse_trace_kprobe_event(const char *str, char **group, char **event, die("Failed to copy argument."); } -end: argv_free(argv); } @@ -368,6 +378,10 @@ static void clear_probe_point(struct probe_point *pp) { int i; + if (pp->event) + free(pp->event); + if (pp->group) + free(pp->group); if (pp->function) free(pp->function); if (pp->file) @@ -382,13 +396,13 @@ static void clear_probe_point(struct probe_point *pp) } /* Show an event */ -static void show_perf_probe_event(const char *group, const char *event, - const char *place, struct probe_point *pp) +static void show_perf_probe_event(const char *event, const char *place, + struct probe_point *pp) { int i, ret; char buf[128]; - ret = e_snprintf(buf, 128, "%s:%s", group, event); + ret = e_snprintf(buf, 128, "%s:%s", pp->group, event); if (ret < 0) die("Failed to copy event: %s", strerror(-ret)); printf(" %-40s (on %s", buf, place); @@ -405,7 +419,6 @@ static void show_perf_probe_event(const char *group, const char *event, void show_perf_probe_events(void) { int fd, nr; - char *group, *event; struct probe_point pp; struct strlist *rawlist; struct str_node *ent; @@ -415,16 +428,14 @@ void show_perf_probe_events(void) close(fd); strlist__for_each(ent, rawlist) { - parse_trace_kprobe_event(ent->s, &group, &event, &pp); + parse_trace_kprobe_event(ent->s, &pp); /* Synthesize only event probe point */ nr = pp.nr_args; pp.nr_args = 0; synthesize_perf_probe_event(&pp); pp.nr_args = nr; /* Show an event */ - show_perf_probe_event(group, event, pp.probes[0], &pp); - free(group); - free(event); + show_perf_probe_event(pp.event, pp.probes[0], &pp); clear_probe_point(&pp); } @@ -434,24 +445,25 @@ void show_perf_probe_events(void) /* Get current perf-probe event names */ static struct strlist *get_perf_event_names(int fd, bool include_group) { - char *group, *event; char buf[128]; struct strlist *sl, *rawlist; struct str_node *ent; + struct probe_point pp; + memset(&pp, 0, sizeof(pp)); rawlist = get_trace_kprobe_event_rawlist(fd); sl = strlist__new(true, NULL); strlist__for_each(ent, rawlist) { - parse_trace_kprobe_event(ent->s, &group, &event, NULL); + parse_trace_kprobe_event(ent->s, &pp); if (include_group) { - if (e_snprintf(buf, 128, "%s:%s", group, event) < 0) + if (e_snprintf(buf, 128, "%s:%s", pp.group, + pp.event) < 0) die("Failed to copy group:event name."); strlist__add(sl, buf); } else - strlist__add(sl, event); - free(group); - free(event); + strlist__add(sl, pp.event); + clear_probe_point(&pp); } strlist__delete(rawlist); @@ -507,19 +519,23 @@ void add_trace_kprobe_events(struct probe_point *probes, int nr_probes) for (j = 0; j < nr_probes; j++) { pp = probes + j; + if (!pp->event) + pp->event = strdup(pp->function); + if (!pp->group) + pp->group = strdup(PERFPROBE_GROUP); + DIE_IF(!pp->event || !pp->group); for (i = 0; i < pp->found; i++) { /* Get an unused new event name */ - get_new_event_name(event, 64, pp->function, namelist); + get_new_event_name(event, 64, pp->event, namelist); snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s\n", pp->retprobe ? 'r' : 'p', - PERFPROBE_GROUP, event, + pp->group, event, pp->probes[i]); write_trace_kprobe_event(fd, buf); printf("Added new event:\n"); /* Get the first parameter (probe-point) */ sscanf(pp->probes[i], "%s", buf); - show_perf_probe_event(PERFPROBE_GROUP, event, - buf, pp); + show_perf_probe_event(event, buf, pp); /* Add added event name to namelist */ strlist__add(namelist, event); } |