Commit-ID: a7619aef6dca913d830675dd914ca6fe7241a730 Gitweb: http://git.kernel.org/tip/a7619aef6dca913d830675dd914ca6fe7241a730 Author: Namhyung Kim <namhyung....@lge.com> AuthorDate: Thu, 18 Apr 2013 21:24:16 +0900 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Thu, 26 Jan 2017 11:43:00 -0300
perf util: Add more debug message on failure path It's helpful for debugging on tracing features. Signed-off-by: Namhyung Kim <namhy...@kernel.org> Tested-by: Masami Hiramatsu <mhira...@kernel.org> Cc: Frederic Weisbecker <fweis...@gmail.com> Cc: Jeremy Eder <je...@redhat.com> Cc: Jiri Olsa <jo...@redhat.com>, Cc: Paul Mackerras <pau...@samba.org> Cc: Peter Zijlstra <a.p.zijls...@chello.nl> Cc: Stephane Eranian <eran...@google.com> Cc: Steven Rostedt <rost...@goodmis.org> Link: http://lkml.kernel.org/n/tip-rjysr9ljiesymgk4qblte...@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/util/header.c | 4 ++- tools/perf/util/trace-event-read.c | 53 ++++++++++++++++++++++++++------------ 2 files changed, 39 insertions(+), 18 deletions(-) diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index 00fd8a8..c567d9f 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -2803,8 +2803,10 @@ static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel, } 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; + } if (!evsel->name) { snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name); diff --git a/tools/perf/util/trace-event-read.c b/tools/perf/util/trace-event-read.c index 61c7162..2742015 100644 --- a/tools/perf/util/trace-event-read.c +++ b/tools/perf/util/trace-event-read.c @@ -260,39 +260,53 @@ static int read_header_files(struct pevent *pevent) static int read_ftrace_file(struct pevent *pevent, unsigned long long size) { + int ret; char *buf; buf = malloc(size); - if (buf == NULL) + if (buf == NULL) { + pr_debug("memory allocation failure\n"); return -1; + } - if (do_read(buf, size) < 0) { - free(buf); - return -1; + ret = do_read(buf, size); + if (ret < 0) { + pr_debug("error reading ftrace file.\n"); + goto out; } - parse_ftrace_file(pevent, buf, size); + ret = parse_ftrace_file(pevent, buf, size); + if (ret < 0) + pr_debug("error parsing ftrace file.\n"); +out: free(buf); - return 0; + return ret; } static int read_event_file(struct pevent *pevent, char *sys, unsigned long long size) { + int ret; char *buf; buf = malloc(size); - if (buf == NULL) + if (buf == NULL) { + pr_debug("memory allocation failure\n"); return -1; + } - if (do_read(buf, size) < 0) { + ret = do_read(buf, size); + if (ret < 0) { free(buf); - return -1; + goto out; } - parse_event_file(pevent, buf, size, sys); + ret = parse_event_file(pevent, buf, size, sys); + if (ret < 0) + pr_debug("error parsing event file.\n"); +out: free(buf); - return 0; + return ret; } static int read_ftrace_files(struct pevent *pevent) @@ -345,6 +359,7 @@ static int read_saved_cmdline(struct pevent *pevent) { unsigned long long size; char *buf; + int ret; /* it can have 0 size */ size = read8(pevent); @@ -352,18 +367,22 @@ static int read_saved_cmdline(struct pevent *pevent) return 0; buf = malloc(size + 1); - if (buf == NULL) + if (buf == NULL) { + pr_debug("memory allocation failure\n"); return -1; + } - if (do_read(buf, size) < 0) { - free(buf); - return -1; + 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); - return 0; + return ret; } ssize_t trace_report(int fd, struct trace_event *tevent, bool __repipe)
