perf tools: Use O_LARGEFILE to open perf data file
Open perf data file with O_LARGEFILE flag since its size is
easily larger that 2G.
For example:
# rm -rf perf.data
# ./perf kmem record sleep 300
[ perf record: Woken up 0 times to write data ]
[ perf record: Captured and wrote 3142.147 MB perf.data
(~137282513 samples) ]
# ll -h perf.data
-rw------- 1 root root 3.1G .....
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <4B68F32A.9040203@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 2bb2bdb..ed3efd7 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1,3 +1,6 @@
+#define _LARGEFILE64_SOURCE
+#define _FILE_OFFSET_BITS 64
+
#include <sys/types.h>
#include <byteswap.h>
#include <unistd.h>
@@ -382,7 +385,7 @@
sec_size = sizeof(*feat_sec) * nr_sections;
sec_start = self->data_offset + self->data_size;
- lseek(fd, sec_start + sec_size, SEEK_SET);
+ lseek64(fd, sec_start + sec_size, SEEK_SET);
if (perf_header__has_feat(self, HEADER_TRACE_INFO)) {
struct perf_file_section *trace_sec;
@@ -390,9 +393,9 @@
trace_sec = &feat_sec[idx++];
/* Write trace info */
- trace_sec->offset = lseek(fd, 0, SEEK_CUR);
+ trace_sec->offset = lseek64(fd, 0, SEEK_CUR);
read_tracing_data(fd, attrs, nr_counters);
- trace_sec->size = lseek(fd, 0, SEEK_CUR) - trace_sec->offset;
+ trace_sec->size = lseek64(fd, 0, SEEK_CUR) - trace_sec->offset;
}
@@ -402,17 +405,18 @@
buildid_sec = &feat_sec[idx++];
/* Write build-ids */
- buildid_sec->offset = lseek(fd, 0, SEEK_CUR);
+ buildid_sec->offset = lseek64(fd, 0, SEEK_CUR);
err = dsos__write_buildid_table(fd);
if (err < 0) {
pr_debug("failed to write buildid table\n");
goto out_free;
}
- buildid_sec->size = lseek(fd, 0, SEEK_CUR) - buildid_sec->offset;
+ buildid_sec->size = lseek64(fd, 0, SEEK_CUR) -
+ buildid_sec->offset;
dsos__cache_build_ids();
}
- lseek(fd, sec_start, SEEK_SET);
+ lseek64(fd, sec_start, SEEK_SET);
err = do_write(fd, feat_sec, sec_size);
if (err < 0)
pr_debug("failed to write feature section\n");
@@ -506,7 +510,7 @@
pr_debug("failed to write perf header\n");
return err;
}
- lseek(fd, self->data_offset + self->data_size, SEEK_SET);
+ lseek64(fd, self->data_offset + self->data_size, SEEK_SET);
self->frozen = 1;
return 0;
@@ -560,7 +564,7 @@
sec_size = sizeof(*feat_sec) * nr_sections;
- lseek(fd, self->data_offset + self->data_size, SEEK_SET);
+ lseek64(fd, self->data_offset + self->data_size, SEEK_SET);
if (perf_header__getbuffer64(self, fd, feat_sec, sec_size))
goto out_free;
@@ -634,7 +638,7 @@
struct perf_header *ph,
int feat, int fd)
{
- if (lseek(fd, self->offset, SEEK_SET) < 0) {
+ if (lseek64(fd, self->offset, SEEK_SET) < 0) {
pr_debug("Failed to lseek to %Ld offset for feature %d, "
"continuing...\n", self->offset, feat);
return 0;