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perf utils: Use a define for the maximum length of a trace event 

As per Ingo's review: use a #define rather than an open coded constant
for the maximum length of a trace event for storing in the perf.data file.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: fweisbec@gmail.com
Cc: peterz@infradead.org
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <20090919133630.10533d3e@infradead.org>
[ add a few comments to nearby functions ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arjan van de Ven 2009-09-19 13:36:30 +02:00 committed by Ingo Molnar
parent 151750cec5
commit ec60a3fe47
1 changed files with 7 additions and 7 deletions
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14
tools/perf/util/header.c
View File

@ -7,9 +7,8 @@
#include "header.h"
/*
*
* Create new perf.data header attribute:
*/
struct perf_header_attr *perf_header_attr__new(struct perf_counter_attr *attr)
{
struct perf_header_attr *self = malloc(sizeof(*self));
@ -43,9 +42,8 @@ void perf_header_attr__add_id(struct perf_header_attr *self, u64 id)
}
/*
*
* Create new perf.data header:
*/
struct perf_header *perf_header__new(void)
{
struct perf_header *self = malloc(sizeof(*self));
@ -86,9 +84,11 @@ void perf_header__add_attr(struct perf_header *self,
self->attr[pos] = attr;
}
#define MAX_EVENT_NAME 64
struct perf_trace_event_type {
u64 event_id;
char name[64];
char name[MAX_EVENT_NAME];
};
static int event_count;
@ -96,7 +96,7 @@ static struct perf_trace_event_type *events;
void perf_header__push_event(u64 id, const char *name)
{
if (strlen(name) > 64)
if (strlen(name) > MAX_EVENT_NAME)
printf("Event %s will be truncated\n", name);
if (!events) {
@ -110,7 +110,7 @@ void perf_header__push_event(u64 id, const char *name)
}
memset(&events[event_count], 0, sizeof(struct perf_trace_event_type));
events[event_count].event_id = id;
strncpy(events[event_count].name, name, 63);
strncpy(events[event_count].name, name, MAX_EVENT_NAME - 1);
event_count++;
}