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Fix: perf ust: check close return value
[lttng-ust.git]
/
liblttng-ust
/
lttng-context-perf-counters.c
diff --git
a/liblttng-ust/lttng-context-perf-counters.c
b/liblttng-ust/lttng-context-perf-counters.c
index d6bd41cc9e20a170dc73f5d76d473781cdd1e737..99691c067f23a421ceee6f5f07f883b68b543e03 100644
(file)
--- a/
liblttng-ust/lttng-context-perf-counters.c
+++ b/
liblttng-ust/lttng-context-perf-counters.c
@@
-134,7
+134,7
@@
static
struct perf_event_mmap_page *setup_perf(struct perf_event_attr *attr)
{
void *perf_addr;
struct perf_event_mmap_page *setup_perf(struct perf_event_attr *attr)
{
void *perf_addr;
- int fd;
+ int fd
, ret
;
fd = sys_perf_event_open(attr, 0, -1, -1, 0);
if (fd < 0)
fd = sys_perf_event_open(attr, 0, -1, -1, 0);
if (fd < 0)
@@
-144,7
+144,10
@@
struct perf_event_mmap_page *setup_perf(struct perf_event_attr *attr)
PROT_READ, MAP_SHARED, fd, 0);
if (perf_addr == MAP_FAILED)
return NULL;
PROT_READ, MAP_SHARED, fd, 0);
if (perf_addr == MAP_FAILED)
return NULL;
- close(fd);
+ ret = close(fd);
+ if (ret) {
+ perror("Error closing LTTng-UST perf memory mapping FD");
+ }
return perf_addr;
}
return perf_addr;
}
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