trace2: avoid emitting 'def_param' set more than once

During nested alias expansion it is possible for "trace2_cmd_list_config()" and "trace2_cmd_list_env_vars()" to be called more than once. This causes a full set of 'def_param' events to be emitted each time. Let's avoid that. Add code to those two functions to only emit them once. Signed-off-by: Jeff Hostetler <[email protected]> Signed-off-by: Junio C Hamano <[email protected]>
git-for-windows · Mar 21, 2024 · cc026b2 · cc026b2
1 parent 4e9f006
commit cc026b2
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diff --git a/t/t0211-trace2-perf.sh b/t/t0211-trace2-perf.sh
@@ -470,7 +470,7 @@ test_expect_success 'expect def_params during shell alias expansion' '
 	grep "d1|main|def_param|.*|ENV_PROP_FOO:blue" actual
 '
 
-test_expect_failure 'expect def_params during nested git alias expansion' '
+test_expect_success 'expect def_params during nested git alias expansion' '
 	test_when_finished "rm prop.perf actual" &&
 
 	test_config_global "trace2.configParams" "cfg.prop.*" &&

diff --git a/trace2.c b/trace2.c
@@ -464,17 +464,29 @@ void trace2_cmd_alias_fl(const char *file, int line, const char *alias,
 
 void trace2_cmd_list_config_fl(const char *file, int line)
 {
+	static int emitted = 0;
+
 	if (!trace2_enabled)
 		return;
 
+	if (emitted)
+		return;
+	emitted = 1;
+
 	tr2_cfg_list_config_fl(file, line);
 }
 
 void trace2_cmd_list_env_vars_fl(const char *file, int line)
 {
+	static int emitted = 0;
+
 	if (!trace2_enabled)
 		return;
 
+	if (emitted)
+		return;
+	emitted = 1;
+
 	tr2_list_env_vars_fl(file, line);
 }