perf top: Stop using exit()
Just return to the perf main() routine so that an unified exit path can be followed and resources released, helping in finding memory leaks. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-ro8oeodo96490nrhcph57atr@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -68,6 +68,8 @@
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#include <linux/unistd.h>
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#include <linux/types.h>
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static volatile int done;
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static void perf_top__update_print_entries(struct perf_top *top)
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{
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if (top->print_entries > 9)
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@ -431,8 +433,10 @@ static int perf_top__key_mapped(struct perf_top *top, int c)
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return 0;
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}
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static void perf_top__handle_keypress(struct perf_top *top, int c)
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static bool perf_top__handle_keypress(struct perf_top *top, int c)
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{
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bool ret = true;
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if (!perf_top__key_mapped(top, c)) {
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struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
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struct termios tc, save;
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@ -453,7 +457,7 @@ static void perf_top__handle_keypress(struct perf_top *top, int c)
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tcsetattr(0, TCSAFLUSH, &save);
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if (!perf_top__key_mapped(top, c))
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return;
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return ret;
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}
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switch (c) {
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@ -515,7 +519,8 @@ static void perf_top__handle_keypress(struct perf_top *top, int c)
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printf("exiting.\n");
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if (top->dump_symtab)
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perf_session__fprintf_dsos(top->session, stderr);
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exit(0);
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ret = false;
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break;
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case 's':
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perf_top__prompt_symbol(top, "Enter details symbol");
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break;
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@ -538,6 +543,8 @@ static void perf_top__handle_keypress(struct perf_top *top, int c)
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default:
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break;
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}
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return ret;
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}
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static void perf_top__sort_new_samples(void *arg)
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@ -579,8 +586,7 @@ static void *display_thread_tui(void *arg)
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perf_evlist__tui_browse_hists(top->evlist, help, &hbt,
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&top->session->header.env);
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exit_browser(0);
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exit(0);
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done = 1;
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return NULL;
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}
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@ -604,7 +610,7 @@ repeat:
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/* trash return*/
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getc(stdin);
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while (1) {
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while (!done) {
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perf_top__print_sym_table(top);
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/*
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* Either timeout expired or we got an EINTR due to SIGWINCH,
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@ -618,15 +624,14 @@ repeat:
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continue;
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/* Fall trhu */
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default:
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goto process_hotkey;
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}
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}
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process_hotkey:
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c = getc(stdin);
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tcsetattr(0, TCSAFLUSH, &save);
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perf_top__handle_keypress(top, c);
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if (perf_top__handle_keypress(top, c))
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goto repeat;
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done = 1;
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}
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}
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return NULL;
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}
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@ -705,7 +710,7 @@ static void perf_event__process_sample(struct perf_tool *tool,
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}
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if (!machine) {
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pr_err("%u unprocessable samples recorded.\n",
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pr_err("%u unprocessable samples recorded.\r",
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top->session->stats.nr_unprocessable_samples++);
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return;
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}
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@ -868,7 +873,7 @@ static void perf_top__mmap_read(struct perf_top *top)
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perf_top__mmap_read_idx(top, i);
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}
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static void perf_top__start_counters(struct perf_top *top)
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static int perf_top__start_counters(struct perf_top *top)
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{
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char msg[512];
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struct perf_evsel *counter;
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@ -900,11 +905,10 @@ try_again:
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goto out_err;
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}
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return;
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return 0;
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out_err:
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exit_browser(0);
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exit(0);
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return -1;
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}
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static int perf_top__setup_sample_type(struct perf_top *top)
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@ -948,7 +952,11 @@ static int __cmd_top(struct perf_top *top)
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else
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perf_event__synthesize_threads(&top->tool, perf_event__process,
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&top->session->machines.host);
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perf_top__start_counters(top);
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ret = perf_top__start_counters(top);
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if (ret)
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goto out_delete;
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top->session->evlist = top->evlist;
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perf_session__set_id_hdr_size(top->session);
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@ -968,10 +976,11 @@ static int __cmd_top(struct perf_top *top)
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perf_top__mmap_read(top);
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ret = -1;
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if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
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display_thread), top)) {
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ui__error("Could not create display thread.\n");
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exit(-1);
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goto out_delete;
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}
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if (top->realtime_prio) {
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@ -980,11 +989,11 @@ static int __cmd_top(struct perf_top *top)
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param.sched_priority = top->realtime_prio;
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if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
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ui__error("Could not set realtime priority.\n");
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exit(-1);
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goto out_delete;
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}
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}
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while (1) {
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while (!done) {
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u64 hits = top->samples;
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perf_top__mmap_read(top);
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@ -993,11 +1002,12 @@ static int __cmd_top(struct perf_top *top)
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ret = poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
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}
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ret = 0;
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out_delete:
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perf_session__delete(top->session);
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top->session = NULL;
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return 0;
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return ret;
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}
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static int
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