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perf tools: fix event parsing of comma-separated tracepoint events 

There are number of issues that prevent the use of multiple tracepoint events
being specified in a -e/--event switch, separated by commas.

For example, perf stat -e irq:irq_handler_entry,irq:irq_handler_exit ...  fails
because the tracepoint event parsing code doesn't recognize the comma separator
properly.

This patch corrects those issues.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Julia Lawall <julia@diku.dk>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Reported-by: Michael Ellerman <michaele@au1.ibm.com>
LKML-Reference: <1291156021-17711-1-git-send-email-cjashfor@linux.vnet.ibm.com>
Signed-off-by: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Corey Ashford 2010-11-30 14:27:01 -08:00 committed by Arnaldo Carvalho de Melo
parent 3e8e24f2fc
commit 4c635a4e04
1 changed files with 8 additions and 4 deletions
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12
tools/perf/util/parse-events.c
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@ -434,7 +434,7 @@ parse_single_tracepoint_event(char *sys_name,
id = atoll(id_buf);
attr->config = id;
attr->type = PERF_TYPE_TRACEPOINT;
*strp = evt_name + evt_length;
*strp += strlen(sys_name) + evt_length + 1; /* + 1 for the ':' */
attr->sample_type |= PERF_SAMPLE_RAW;
attr->sample_type |= PERF_SAMPLE_TIME;
@ -495,7 +495,7 @@ static enum event_result parse_tracepoint_event(const char **strp,
struct perf_event_attr *attr)
{
const char *evt_name;
char *flags;
char *flags = NULL, *comma_loc;
char sys_name[MAX_EVENT_LENGTH];
unsigned int sys_length, evt_length;
@ -514,6 +514,11 @@ static enum event_result parse_tracepoint_event(const char **strp,
sys_name[sys_length] = '\0';
evt_name = evt_name + 1;
comma_loc = strchr(evt_name, ',');
if (comma_loc) {
/* take the event name up to the comma */
evt_name = strndup(evt_name, comma_loc - evt_name);
}
flags = strchr(evt_name, ':');
if (flags) {
/* split it out: */
@ -524,9 +529,8 @@ static enum event_result parse_tracepoint_event(const char **strp,
evt_length = strlen(evt_name);
if (evt_length >= MAX_EVENT_LENGTH)
return EVT_FAILED;
if (strpbrk(evt_name, "*?")) {
*strp = evt_name + evt_length;
*strp += strlen(sys_name) + evt_length;
return parse_multiple_tracepoint_event(sys_name, evt_name,
flags);
} else