trace2: emit 'def_param' set with 'cmd_name' event

Some commands do not cause a set of 'def_param' events to be emitted.
This includes "git-remote-https", "git-http-fetch", and various
"query" commands, like "git --man-path".

Since all of these commands do emit a 'cmd_name' event, add code to
the "trace2_cmd_name()" function to generate the set of 'def_param'
events.

Remove explicit calls to "trace2_cmd_list_config()" and
"trace2_cmd_list_env_vars()" in git.c since they are no longer needed.

Reviewed-by: Josh Steadmon <[email protected]>
Signed-off-by: Jeff Hostetler <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

git.c

@@ -377,8 +377,6 @@ static int handle_alias(int *argcp, const char ***argv)
 			strvec_pushv(&child.args, (*argv) + 1);
 
 			trace2_cmd_alias(alias_command, child.args.v);
-			trace2_cmd_list_config();
-			trace2_cmd_list_env_vars();
 			trace2_cmd_name("_run_shell_alias_");
 
 			ret = run_command(&child);
@@ -415,8 +413,6 @@ static int handle_alias(int *argcp, const char ***argv)
 		COPY_ARRAY(new_argv + count, *argv + 1, *argcp);
 
 		trace2_cmd_alias(alias_command, new_argv);
-		trace2_cmd_list_config();
-		trace2_cmd_list_env_vars();
 
 		*argv = new_argv;
 		*argcp += count - 1;
@@ -534,8 +530,6 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
 
 	trace_argv_printf(argv, "trace: built-in: git");
 	trace2_cmd_name(p->cmd);
-	trace2_cmd_list_config();
-	trace2_cmd_list_env_vars();
 
 	validate_cache_entries(the_repository->index);
 	exit_code = status = p->fn(argc, argv, prefix);

t/t0211-trace2-perf.sh

@@ -320,7 +320,7 @@ test_expect_success 'expect def_params for normal builtin command' '
 # Representative query command dispatched in handle_options()
 # in git.c
 #
-test_expect_failure 'expect def_params for query command' '
+test_expect_success 'expect def_params for query command' '
 	try_simple "git --man-path" "_query_"
 '
 
@@ -337,7 +337,7 @@ test_expect_failure 'expect def_params for query command' '
 # remote-curl.c rather than git.c.  Confirm that we get def_param
 # events from both layers.
 #
-test_expect_failure 'expect def_params for remote-curl and _run_dashed_' '
+test_expect_success 'expect def_params for remote-curl and _run_dashed_' '
 	test_when_finished "rm prop.perf actual" &&
 
 	test_config_global "trace2.configParams" "cfg.prop.*" &&
@@ -366,7 +366,7 @@ test_expect_failure 'expect def_params for remote-curl and _run_dashed_' '
 # an executable built from http-fetch.c.  Confirm that we get
 # def_param events from both layers.
 #
-test_expect_failure 'expect def_params for http-fetch and _run_dashed_' '
+test_expect_success 'expect def_params for http-fetch and _run_dashed_' '
 	test_when_finished "rm prop.perf actual" &&
 
 	test_config_global "trace2.configParams" "cfg.prop.*" &&

trace2.c

@@ -433,6 +433,9 @@ void trace2_cmd_name_fl(const char *file, int line, const char *name)
 	for_each_wanted_builtin (j, tgt_j)
 		if (tgt_j->pfn_command_name_fl)
 			tgt_j->pfn_command_name_fl(file, line, name, hierarchy);
+
+	trace2_cmd_list_config();
+	trace2_cmd_list_env_vars();
 }
 
 void trace2_cmd_mode_fl(const char *file, int line, const char *mode)