perf debug: Move debug initialization earlier

This avoids segfaults during option handlers that use pr_err. For
example, "perf --debug nopager list" segfaults before this change.

Fixes: 8abceacff87d (perf debug: Add debug_set_file function)
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20210519164447.2672030-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 20cb91e..2f6b671 100644 (file)
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -443,6 +443,8 @@ int main(int argc, const char **argv)
        const char *cmd;
        char sbuf[STRERR_BUFSIZE];
 
+       perf_debug_setup();
+
        /* libsubcmd init */
        exec_cmd_init("perf", PREFIX, PERF_EXEC_PATH, EXEC_PATH_ENVIRONMENT);
        pager_init(PERF_PAGER_ENVIRONMENT);
@@ -531,8 +533,6 @@ int main(int argc, const char **argv)
         */
        pthread__block_sigwinch();
 
-       perf_debug_setup();
-
        while (1) {
                static int done_help;