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perf util: Add more debug message on failure path

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It's helpful for debugging on tracing features.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jeremy Eder <jeder@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>,
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/n/tip-rjysr9ljiesymgk4qblteaty@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim
2013-04-18 21:24:16 +09:00
committed by Arnaldo Carvalho de Melo
parent cd4ceb6343
commit a7619aef6d
2 changed files with 43 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
tools/perf/util/header.c
View File

@@ -2803,8 +2803,10 @@ static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel,
} }
event = pevent_find_event(pevent, evsel->attr.config); event = pevent_find_event(pevent, evsel->attr.config);
if (event == NULL) if (event == NULL) {
pr_debug("cannot find event format for %d\n", (int)evsel->attr.config);
return -1; return -1;
}
if (!evsel->name) { if (!evsel->name) {
snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name); snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name);

61
tools/perf/util/trace-event-read.c
View File

@@ -260,39 +260,53 @@ static int read_header_files(struct pevent *pevent)
static int read_ftrace_file(struct pevent *pevent, unsigned long long size) static int read_ftrace_file(struct pevent *pevent, unsigned long long size)
{ {
int ret;
char *buf; char *buf;
buf = malloc(size); buf = malloc(size);
if (buf == NULL) if (buf == NULL) {
return -1; pr_debug("memory allocation failure\n");
if (do_read(buf, size) < 0) {
free(buf);
return -1; return -1;
} }
parse_ftrace_file(pevent, buf, size); ret = do_read(buf, size);
if (ret < 0) {
pr_debug("error reading ftrace file.\n");
goto out;
}
ret = parse_ftrace_file(pevent, buf, size);
if (ret < 0)
pr_debug("error parsing ftrace file.\n");
out:
free(buf); free(buf);
return 0; return ret;
} }
static int read_event_file(struct pevent *pevent, char *sys, static int read_event_file(struct pevent *pevent, char *sys,
unsigned long long size) unsigned long long size)
{ {
int ret;
char *buf; char *buf;
buf = malloc(size); buf = malloc(size);
if (buf == NULL) if (buf == NULL) {
return -1; pr_debug("memory allocation failure\n");
if (do_read(buf, size) < 0) {
free(buf);
return -1; return -1;
} }
parse_event_file(pevent, buf, size, sys); ret = do_read(buf, size);
if (ret < 0) {
free(buf); free(buf);
return 0; goto out;
}
ret = parse_event_file(pevent, buf, size, sys);
if (ret < 0)
pr_debug("error parsing event file.\n");
out:
free(buf);
return ret;
} }
static int read_ftrace_files(struct pevent *pevent) static int read_ftrace_files(struct pevent *pevent)
@@ -345,6 +359,7 @@ static int read_saved_cmdline(struct pevent *pevent)
{ {
unsigned long long size; unsigned long long size;
char *buf; char *buf;
int ret;
/* it can have 0 size */ /* it can have 0 size */
size = read8(pevent); size = read8(pevent);
@@ -352,18 +367,22 @@ static int read_saved_cmdline(struct pevent *pevent)
return 0; return 0;
buf = malloc(size + 1); buf = malloc(size + 1);
if (buf == NULL) if (buf == NULL) {
return -1; pr_debug("memory allocation failure\n");
if (do_read(buf, size) < 0) {
free(buf);
return -1; return -1;
} }
parse_saved_cmdline(pevent, buf, size); ret = do_read(buf, size);
if (ret < 0) {
pr_debug("error reading saved cmdlines\n");
goto out;
}
parse_saved_cmdline(pevent, buf, size);
ret = 0;
out:
free(buf); free(buf);
return 0; return ret;
} }
ssize_t trace_report(int fd, struct trace_event *tevent, bool __repipe) ssize_t trace_report(int fd, struct trace_event *tevent, bool __repipe)