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authorNamhyung Kim <namhyung.kim@lge.com>2013-03-21 11:18:48 +0400
committerArnaldo Carvalho de Melo <acme@redhat.com>2013-03-21 20:30:52 +0400
commit3dce2ce3cc40ece2562a5a83e879b4bfb451476c (patch)
treeb066d350c037448be3e4b33866caea190f4f00be /tools
parent7f42b9505aee3fa9cb465a670989e3d426a1f3f2 (diff)
downloadlinux-3dce2ce3cc40ece2562a5a83e879b4bfb451476c.tar.xz
perf tools: Handle failure case in trace_report()
If pevent allocation in read_trace_init() fails, trace_report() will return -1 and *ppevent is set to NULL. Its callers should check this case and handle it properly. This is also a preparation for the removal of *die() calls. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/1363850332-25297-6-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/util/header.c9
-rw-r--r--tools/perf/util/trace-event-read.c41
2 files changed, 31 insertions, 19 deletions
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 79e48c726938..326068a593a5 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1670,8 +1670,8 @@ static int process_tracing_data(struct perf_file_section *section __maybe_unused
struct perf_header *ph __maybe_unused,
int fd, void *data)
{
- trace_report(fd, data, false);
- return 0;
+ ssize_t ret = trace_report(fd, data, false);
+ return ret < 0 ? -1 : 0;
}
static int process_build_id(struct perf_file_section *section,
@@ -2750,6 +2750,11 @@ static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel,
if (evsel->tp_format)
return 0;
+ if (pevent == NULL) {
+ pr_debug("broken or missing trace data\n");
+ return -1;
+ }
+
event = pevent_find_event(pevent, evsel->attr.config);
if (event == NULL)
return -1;
diff --git a/tools/perf/util/trace-event-read.c b/tools/perf/util/trace-event-read.c
index 8c8181aa286a..ba752d765ac3 100644
--- a/tools/perf/util/trace-event-read.c
+++ b/tools/perf/util/trace-event-read.c
@@ -291,7 +291,10 @@ ssize_t trace_report(int fd, struct pevent **ppevent, bool __repipe)
int show_version = 0;
int show_funcs = 0;
int show_printk = 0;
- ssize_t size;
+ ssize_t size = -1;
+ struct pevent *pevent;
+
+ *ppevent = NULL;
calc_data_size = 1;
repipe = __repipe;
@@ -315,34 +318,38 @@ ssize_t trace_report(int fd, struct pevent **ppevent, bool __repipe)
file_bigendian = buf[0];
host_bigendian = bigendian();
- *ppevent = read_trace_init(file_bigendian, host_bigendian);
- if (*ppevent == NULL)
- die("read_trace_init failed");
+ pevent = read_trace_init(file_bigendian, host_bigendian);
+ if (pevent == NULL) {
+ pr_debug("read_trace_init failed");
+ goto out;
+ }
read_or_die(buf, 1);
long_size = buf[0];
- page_size = read4(*ppevent);
-
- read_header_files(*ppevent);
+ page_size = read4(pevent);
- read_ftrace_files(*ppevent);
- read_event_files(*ppevent);
- read_proc_kallsyms(*ppevent);
- read_ftrace_printk(*ppevent);
+ read_header_files(pevent);
+ read_ftrace_files(pevent);
+ read_event_files(pevent);
+ read_proc_kallsyms(pevent);
+ read_ftrace_printk(pevent);
size = calc_data_size - 1;
calc_data_size = 0;
repipe = false;
if (show_funcs) {
- pevent_print_funcs(*ppevent);
- return size;
- }
- if (show_printk) {
- pevent_print_printk(*ppevent);
- return size;
+ pevent_print_funcs(pevent);
+ } else if (show_printk) {
+ pevent_print_printk(pevent);
}
+ *ppevent = pevent;
+ pevent = NULL;
+
+out:
+ if (pevent)
+ pevent_free(pevent);
return size;
}