Messages in this thread Patch in this message | | | From | Namhyung Kim <> | Subject | [PATCH 15/15] perf ftrace: Add a signal handler for SIGSEGV | Date | Tue, 14 May 2013 19:13:59 +0900 |
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From: Namhyung Kim <namhyung.kim@lge.com>
It's for debugging purpose.
Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> --- tools/perf/builtin-ftrace.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c index 6d69bf411314..76bbbf294ec6 100644 --- a/tools/perf/builtin-ftrace.c +++ b/tools/perf/builtin-ftrace.c @@ -41,6 +41,13 @@ struct perf_ftrace { static bool done; +static void sig_exit(int sig) +{ + psignal(sig, "perf"); + signal(sig, SIG_DFL); + raise(sig); +} + static void sig_handler(int sig __maybe_unused) { done = true; @@ -228,6 +235,7 @@ static int do_ftrace_live(struct perf_ftrace *ftrace) signal(SIGUSR1, sig_handler); signal(SIGCHLD, sig_handler); signal(SIGPIPE, sig_handler); + signal(SIGSEGV, sig_exit); if (setup_tracing_files(ftrace) < 0) goto out_reset; @@ -602,6 +610,7 @@ static int do_ftrace_record(struct perf_ftrace *ftrace) signal(SIGINT, sig_handler); signal(SIGUSR1, sig_handler); signal(SIGCHLD, sig_handler); + signal(SIGSEGV, sig_exit); if (setup_tracing_files(ftrace) < 0) goto out_reset; @@ -1100,6 +1109,8 @@ static int do_ftrace_show(struct perf_ftrace *ftrace) }, }; + signal(SIGSEGV, sig_exit); + scnprintf(buf, sizeof(buf), "%s.dir/perf.header", ftrace->dirname); session = perf_session__new(buf, O_RDONLY, false, false, &show.tool); @@ -1271,6 +1282,8 @@ static int do_ftrace_report(struct perf_ftrace *ftrace) struct machine *machine; struct dso *dso; + signal(SIGSEGV, sig_exit); + scnprintf(buf, sizeof(buf), "%s.dir/perf.header", ftrace->dirname); session = perf_session__new(buf, O_RDONLY, false, false, &report.tool); -- 1.7.11.7
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