Merge tag 'perf-core-for-mingo-20160226' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

User visible changes:

 - Show extra line telling no entries below --percent-limit are
   at that --hierarchy level (Namhyung Kim)

 - 'perf report/top --hierarchy' assorted alignment fixes (Namhyung Kim)

 - Handle empty print fmts in 'perf script -s' i.e. when running
   python or perl scripts (Taeung Song)

 - Improve support for bpf-output events in 'perf trace' (Wang Nan)

 - Fix parsing of pmu events with empty list of modifiers, this
   cures a perf/core-only regression where '-e intel_pt//' got
   broken (Arnaldo Carvalho de Melo)

Infrastructure changes:

 - Improve missing OpenJDK devel files error message in jvmti
   Makefile (Stephane Eranian)

 - Remove duplicated code and needless script_spec__findnew() (Taeung Song)

 - Bring perf_default_config to the very beginning at main(), removing
   the need for each subcommand to do this (Wang Nan)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 10 insertions, 6 deletions

diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 144047c396f0..aaee0a782747 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -454,11 +454,12 @@ static void handle_internal_command(int argc, const char **argv)
 
 static void execv_dashed_external(const char **argv)
 {
-	struct strbuf cmd = STRBUF_INIT;
+	char *cmd;
 	const char *tmp;
 	int status;
 
-	strbuf_addf(&cmd, "perf-%s", argv[0]);
+	if (asprintf(&cmd, "perf-%s", argv[0]) < 0)
+		goto do_die;
 
 	/*
 	 * argv[0] must be the perf command, but the argv array
@@ -467,7 +468,7 @@ static void execv_dashed_external(const char **argv)
 	 * restore it on error.
 	 */
 	tmp = argv[0];
-	argv[0] = cmd.buf;
+	argv[0] = cmd;
 
 	/*
 	 * if we fail because the command is not found, it is
@@ -475,15 +476,16 @@ static void execv_dashed_external(const char **argv)
 	 */
 	status = run_command_v_opt(argv, 0);
 	if (status != -ERR_RUN_COMMAND_EXEC) {
-		if (IS_RUN_COMMAND_ERR(status))
+		if (IS_RUN_COMMAND_ERR(status)) {
+do_die:
 			die("unable to run '%s'", argv[0]);
+		}
 		exit(-status);
 	}
 	errno = ENOENT; /* as if we called execvp */
 
 	argv[0] = tmp;
-
-	strbuf_release(&cmd);
+	zfree(&cmd);
 }
 
 static int run_argv(int *argcp, const char ***argv)
@@ -546,6 +548,8 @@ int main(int argc, const char **argv)
 
 	srandom(time(NULL));
 
+	perf_config(perf_default_config, NULL);
+
 	/* get debugfs/tracefs mount point from /proc/mounts */
 	tracing_path_mount();