From: Ingo Molnar <mingo@elte.hu>
Date: Wed, 1 Dec 2010 08:18:12 +0000 (+0100)
Subject: Merge branch 'perf/rename' into perf/core
X-Git-Tag: MMI-PSA29.97-13-9~20972^2~87
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b3d006c0e745bfd2dab4984ffe3279d5cf4e926a;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git

Merge branch 'perf/rename' into perf/core

Merge reason: This is an older commit under testing that was not pushed yet - merge it.

Also fix up the merge in command-list.txt.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Tom Zanussi <tzanussi@gmail.com>
---

b3d006c0e745bfd2dab4984ffe3279d5cf4e926a
diff --cc tools/perf/builtin-script.c
index 000000000000,492d19d86534..4539551ab40e
mode 000000,100644..100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@@ -1,0 -1,826 +1,843 @@@
+ #include "builtin.h"
+ 
+ #include "perf.h"
+ #include "util/cache.h"
+ #include "util/debug.h"
+ #include "util/exec_cmd.h"
+ #include "util/header.h"
+ #include "util/parse-options.h"
+ #include "util/session.h"
+ #include "util/symbol.h"
+ #include "util/thread.h"
+ #include "util/trace-event.h"
+ #include "util/parse-options.h"
+ #include "util/util.h"
+ 
+ static char const		*script_name;
+ static char const		*generate_script_lang;
+ static bool			debug_mode;
+ static u64			last_timestamp;
+ static u64			nr_unordered;
+ extern const struct option	record_options[];
+ 
+ static int default_start_script(const char *script __unused,
+ 				int argc __unused,
+ 				const char **argv __unused)
+ {
+ 	return 0;
+ }
+ 
+ static int default_stop_script(void)
+ {
+ 	return 0;
+ }
+ 
+ static int default_generate_script(const char *outfile __unused)
+ {
+ 	return 0;
+ }
+ 
+ static struct scripting_ops default_scripting_ops = {
+ 	.start_script		= default_start_script,
+ 	.stop_script		= default_stop_script,
+ 	.process_event		= print_event,
+ 	.generate_script	= default_generate_script,
+ };
+ 
+ static struct scripting_ops	*scripting_ops;
+ 
+ static void setup_scripting(void)
+ {
+ 	setup_perl_scripting();
+ 	setup_python_scripting();
+ 
+ 	scripting_ops = &default_scripting_ops;
+ }
+ 
+ static int cleanup_scripting(void)
+ {
+ 	pr_debug("\nperf script stopped\n");
+ 
+ 	return scripting_ops->stop_script();
+ }
+ 
+ static char const		*input_name = "perf.data";
+ 
+ static int process_sample_event(event_t *event, struct perf_session *session)
+ {
+ 	struct sample_data data;
+ 	struct thread *thread;
+ 
+ 	memset(&data, 0, sizeof(data));
+ 	data.time = -1;
+ 	data.cpu = -1;
+ 	data.period = 1;
+ 
+ 	event__parse_sample(event, session->sample_type, &data);
+ 
+ 	dump_printf("(IP, %d): %d/%d: %#Lx period: %Ld\n", event->header.misc,
+ 		    data.pid, data.tid, data.ip, data.period);
+ 
+ 	thread = perf_session__findnew(session, event->ip.pid);
+ 	if (thread == NULL) {
+ 		pr_debug("problem processing %d event, skipping it.\n",
+ 			 event->header.type);
+ 		return -1;
+ 	}
+ 
+ 	if (session->sample_type & PERF_SAMPLE_RAW) {
+ 		if (debug_mode) {
+ 			if (data.time < last_timestamp) {
+ 				pr_err("Samples misordered, previous: %llu "
+ 					"this: %llu\n", last_timestamp,
+ 					data.time);
+ 				nr_unordered++;
+ 			}
+ 			last_timestamp = data.time;
+ 			return 0;
+ 		}
+ 		/*
+ 		 * FIXME: better resolve from pid from the struct trace_entry
+ 		 * field, although it should be the same than this perf
+ 		 * event pid
+ 		 */
+ 		scripting_ops->process_event(data.cpu, data.raw_data,
+ 					     data.raw_size,
+ 					     data.time, thread->comm);
+ 	}
+ 
+ 	session->hists.stats.total_period += data.period;
+ 	return 0;
+ }
+ 
+ static u64 nr_lost;
+ 
+ static int process_lost_event(event_t *event, struct perf_session *session __used)
+ {
+ 	nr_lost += event->lost.lost;
+ 
+ 	return 0;
+ }
+ 
+ static struct perf_event_ops event_ops = {
+ 	.sample	= process_sample_event,
+ 	.comm	= event__process_comm,
+ 	.attr	= event__process_attr,
+ 	.event_type = event__process_event_type,
+ 	.tracing_data = event__process_tracing_data,
+ 	.build_id = event__process_build_id,
+ 	.lost = process_lost_event,
+ 	.ordered_samples = true,
+ };
+ 
+ extern volatile int session_done;
+ 
+ static void sig_handler(int sig __unused)
+ {
+ 	session_done = 1;
+ }
+ 
+ static int __cmd_script(struct perf_session *session)
+ {
+ 	int ret;
+ 
+ 	signal(SIGINT, sig_handler);
+ 
+ 	ret = perf_session__process_events(session, &event_ops);
+ 
+ 	if (debug_mode) {
+ 		pr_err("Misordered timestamps: %llu\n", nr_unordered);
+ 		pr_err("Lost events: %llu\n", nr_lost);
+ 	}
+ 
+ 	return ret;
+ }
+ 
+ struct script_spec {
+ 	struct list_head	node;
+ 	struct scripting_ops	*ops;
+ 	char			spec[0];
+ };
+ 
+ LIST_HEAD(script_specs);
+ 
+ static struct script_spec *script_spec__new(const char *spec,
+ 					    struct scripting_ops *ops)
+ {
+ 	struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);
+ 
+ 	if (s != NULL) {
+ 		strcpy(s->spec, spec);
+ 		s->ops = ops;
+ 	}
+ 
+ 	return s;
+ }
+ 
+ static void script_spec__delete(struct script_spec *s)
+ {
+ 	free(s->spec);
+ 	free(s);
+ }
+ 
+ static void script_spec__add(struct script_spec *s)
+ {
+ 	list_add_tail(&s->node, &script_specs);
+ }
+ 
+ static struct script_spec *script_spec__find(const char *spec)
+ {
+ 	struct script_spec *s;
+ 
+ 	list_for_each_entry(s, &script_specs, node)
+ 		if (strcasecmp(s->spec, spec) == 0)
+ 			return s;
+ 	return NULL;
+ }
+ 
+ static struct script_spec *script_spec__findnew(const char *spec,
+ 						struct scripting_ops *ops)
+ {
+ 	struct script_spec *s = script_spec__find(spec);
+ 
+ 	if (s)
+ 		return s;
+ 
+ 	s = script_spec__new(spec, ops);
+ 	if (!s)
+ 		goto out_delete_spec;
+ 
+ 	script_spec__add(s);
+ 
+ 	return s;
+ 
+ out_delete_spec:
+ 	script_spec__delete(s);
+ 
+ 	return NULL;
+ }
+ 
+ int script_spec_register(const char *spec, struct scripting_ops *ops)
+ {
+ 	struct script_spec *s;
+ 
+ 	s = script_spec__find(spec);
+ 	if (s)
+ 		return -1;
+ 
+ 	s = script_spec__findnew(spec, ops);
+ 	if (!s)
+ 		return -1;
+ 
+ 	return 0;
+ }
+ 
+ static struct scripting_ops *script_spec__lookup(const char *spec)
+ {
+ 	struct script_spec *s = script_spec__find(spec);
+ 	if (!s)
+ 		return NULL;
+ 
+ 	return s->ops;
+ }
+ 
+ static void list_available_languages(void)
+ {
+ 	struct script_spec *s;
+ 
+ 	fprintf(stderr, "\n");
+ 	fprintf(stderr, "Scripting language extensions (used in "
+ 		"perf script -s [spec:]script.[spec]):\n\n");
+ 
+ 	list_for_each_entry(s, &script_specs, node)
+ 		fprintf(stderr, "  %-42s [%s]\n", s->spec, s->ops->name);
+ 
+ 	fprintf(stderr, "\n");
+ }
+ 
+ static int parse_scriptname(const struct option *opt __used,
+ 			    const char *str, int unset __used)
+ {
+ 	char spec[PATH_MAX];
+ 	const char *script, *ext;
+ 	int len;
+ 
+ 	if (strcmp(str, "lang") == 0) {
+ 		list_available_languages();
+ 		exit(0);
+ 	}
+ 
+ 	script = strchr(str, ':');
+ 	if (script) {
+ 		len = script - str;
+ 		if (len >= PATH_MAX) {
+ 			fprintf(stderr, "invalid language specifier");
+ 			return -1;
+ 		}
+ 		strncpy(spec, str, len);
+ 		spec[len] = '\0';
+ 		scripting_ops = script_spec__lookup(spec);
+ 		if (!scripting_ops) {
+ 			fprintf(stderr, "invalid language specifier");
+ 			return -1;
+ 		}
+ 		script++;
+ 	} else {
+ 		script = str;
+ 		ext = strrchr(script, '.');
+ 		if (!ext) {
+ 			fprintf(stderr, "invalid script extension");
+ 			return -1;
+ 		}
+ 		scripting_ops = script_spec__lookup(++ext);
+ 		if (!scripting_ops) {
+ 			fprintf(stderr, "invalid script extension");
+ 			return -1;
+ 		}
+ 	}
+ 
+ 	script_name = strdup(script);
+ 
+ 	return 0;
+ }
+ 
 -#define for_each_lang(scripts_dir, lang_dirent, lang_next)		\
++/* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */
++static int is_directory(const char *base_path, const struct dirent *dent)
++{
++	char path[PATH_MAX];
++	struct stat st;
++
++	sprintf(path, "%s/%s", base_path, dent->d_name);
++	if (stat(path, &st))
++		return 0;
++
++	return S_ISDIR(st.st_mode);
++}
++
++#define for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next)\
+ 	while (!readdir_r(scripts_dir, &lang_dirent, &lang_next) &&	\
+ 	       lang_next)						\
 -		if (lang_dirent.d_type == DT_DIR &&			\
++		if ((lang_dirent.d_type == DT_DIR ||			\
++		     (lang_dirent.d_type == DT_UNKNOWN &&		\
++		      is_directory(scripts_path, &lang_dirent))) &&	\
+ 		    (strcmp(lang_dirent.d_name, ".")) &&		\
+ 		    (strcmp(lang_dirent.d_name, "..")))
+ 
 -#define for_each_script(lang_dir, script_dirent, script_next)		\
++#define for_each_script(lang_path, lang_dir, script_dirent, script_next)\
+ 	while (!readdir_r(lang_dir, &script_dirent, &script_next) &&	\
+ 	       script_next)						\
 -		if (script_dirent.d_type != DT_DIR)
++		if (script_dirent.d_type != DT_DIR &&			\
++		    (script_dirent.d_type != DT_UNKNOWN ||		\
++		     !is_directory(lang_path, &script_dirent)))
+ 
+ 
+ #define RECORD_SUFFIX			"-record"
+ #define REPORT_SUFFIX			"-report"
+ 
+ struct script_desc {
+ 	struct list_head	node;
+ 	char			*name;
+ 	char			*half_liner;
+ 	char			*args;
+ };
+ 
+ LIST_HEAD(script_descs);
+ 
+ static struct script_desc *script_desc__new(const char *name)
+ {
+ 	struct script_desc *s = zalloc(sizeof(*s));
+ 
+ 	if (s != NULL && name)
+ 		s->name = strdup(name);
+ 
+ 	return s;
+ }
+ 
+ static void script_desc__delete(struct script_desc *s)
+ {
+ 	free(s->name);
+ 	free(s->half_liner);
+ 	free(s->args);
+ 	free(s);
+ }
+ 
+ static void script_desc__add(struct script_desc *s)
+ {
+ 	list_add_tail(&s->node, &script_descs);
+ }
+ 
+ static struct script_desc *script_desc__find(const char *name)
+ {
+ 	struct script_desc *s;
+ 
+ 	list_for_each_entry(s, &script_descs, node)
+ 		if (strcasecmp(s->name, name) == 0)
+ 			return s;
+ 	return NULL;
+ }
+ 
+ static struct script_desc *script_desc__findnew(const char *name)
+ {
+ 	struct script_desc *s = script_desc__find(name);
+ 
+ 	if (s)
+ 		return s;
+ 
+ 	s = script_desc__new(name);
+ 	if (!s)
+ 		goto out_delete_desc;
+ 
+ 	script_desc__add(s);
+ 
+ 	return s;
+ 
+ out_delete_desc:
+ 	script_desc__delete(s);
+ 
+ 	return NULL;
+ }
+ 
+ static char *ends_with(char *str, const char *suffix)
+ {
+ 	size_t suffix_len = strlen(suffix);
+ 	char *p = str;
+ 
+ 	if (strlen(str) > suffix_len) {
+ 		p = str + strlen(str) - suffix_len;
+ 		if (!strncmp(p, suffix, suffix_len))
+ 			return p;
+ 	}
+ 
+ 	return NULL;
+ }
+ 
+ static char *ltrim(char *str)
+ {
+ 	int len = strlen(str);
+ 
+ 	while (len && isspace(*str)) {
+ 		len--;
+ 		str++;
+ 	}
+ 
+ 	return str;
+ }
+ 
+ static int read_script_info(struct script_desc *desc, const char *filename)
+ {
+ 	char line[BUFSIZ], *p;
+ 	FILE *fp;
+ 
+ 	fp = fopen(filename, "r");
+ 	if (!fp)
+ 		return -1;
+ 
+ 	while (fgets(line, sizeof(line), fp)) {
+ 		p = ltrim(line);
+ 		if (strlen(p) == 0)
+ 			continue;
+ 		if (*p != '#')
+ 			continue;
+ 		p++;
+ 		if (strlen(p) && *p == '!')
+ 			continue;
+ 
+ 		p = ltrim(p);
+ 		if (strlen(p) && p[strlen(p) - 1] == '\n')
+ 			p[strlen(p) - 1] = '\0';
+ 
+ 		if (!strncmp(p, "description:", strlen("description:"))) {
+ 			p += strlen("description:");
+ 			desc->half_liner = strdup(ltrim(p));
+ 			continue;
+ 		}
+ 
+ 		if (!strncmp(p, "args:", strlen("args:"))) {
+ 			p += strlen("args:");
+ 			desc->args = strdup(ltrim(p));
+ 			continue;
+ 		}
+ 	}
+ 
+ 	fclose(fp);
+ 
+ 	return 0;
+ }
+ 
+ static int list_available_scripts(const struct option *opt __used,
+ 				  const char *s __used, int unset __used)
+ {
+ 	struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
+ 	char scripts_path[MAXPATHLEN];
+ 	DIR *scripts_dir, *lang_dir;
+ 	char script_path[MAXPATHLEN];
+ 	char lang_path[MAXPATHLEN];
+ 	struct script_desc *desc;
+ 	char first_half[BUFSIZ];
+ 	char *script_root;
+ 	char *str;
+ 
+ 	snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
+ 
+ 	scripts_dir = opendir(scripts_path);
+ 	if (!scripts_dir)
+ 		return -1;
+ 
 -	for_each_lang(scripts_dir, lang_dirent, lang_next) {
++	for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
+ 		snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
+ 			 lang_dirent.d_name);
+ 		lang_dir = opendir(lang_path);
+ 		if (!lang_dir)
+ 			continue;
+ 
 -		for_each_script(lang_dir, script_dirent, script_next) {
++		for_each_script(lang_path, lang_dir, script_dirent, script_next) {
+ 			script_root = strdup(script_dirent.d_name);
+ 			str = ends_with(script_root, REPORT_SUFFIX);
+ 			if (str) {
+ 				*str = '\0';
+ 				desc = script_desc__findnew(script_root);
+ 				snprintf(script_path, MAXPATHLEN, "%s/%s",
+ 					 lang_path, script_dirent.d_name);
+ 				read_script_info(desc, script_path);
+ 			}
+ 			free(script_root);
+ 		}
+ 	}
+ 
+ 	fprintf(stdout, "List of available trace scripts:\n");
+ 	list_for_each_entry(desc, &script_descs, node) {
+ 		sprintf(first_half, "%s %s", desc->name,
+ 			desc->args ? desc->args : "");
+ 		fprintf(stdout, "  %-36s %s\n", first_half,
+ 			desc->half_liner ? desc->half_liner : "");
+ 	}
+ 
+ 	exit(0);
+ }
+ 
+ static char *get_script_path(const char *script_root, const char *suffix)
+ {
+ 	struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
+ 	char scripts_path[MAXPATHLEN];
+ 	char script_path[MAXPATHLEN];
+ 	DIR *scripts_dir, *lang_dir;
+ 	char lang_path[MAXPATHLEN];
+ 	char *str, *__script_root;
+ 	char *path = NULL;
+ 
+ 	snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
+ 
+ 	scripts_dir = opendir(scripts_path);
+ 	if (!scripts_dir)
+ 		return NULL;
+ 
 -	for_each_lang(scripts_dir, lang_dirent, lang_next) {
++	for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
+ 		snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
+ 			 lang_dirent.d_name);
+ 		lang_dir = opendir(lang_path);
+ 		if (!lang_dir)
+ 			continue;
+ 
 -		for_each_script(lang_dir, script_dirent, script_next) {
++		for_each_script(lang_path, lang_dir, script_dirent, script_next) {
+ 			__script_root = strdup(script_dirent.d_name);
+ 			str = ends_with(__script_root, suffix);
+ 			if (str) {
+ 				*str = '\0';
+ 				if (strcmp(__script_root, script_root))
+ 					continue;
+ 				snprintf(script_path, MAXPATHLEN, "%s/%s",
+ 					 lang_path, script_dirent.d_name);
+ 				path = strdup(script_path);
+ 				free(__script_root);
+ 				break;
+ 			}
+ 			free(__script_root);
+ 		}
+ 	}
+ 
+ 	return path;
+ }
+ 
+ static bool is_top_script(const char *script_path)
+ {
+ 	return ends_with((char *)script_path, "top") == NULL ? false : true;
+ }
+ 
+ static int has_required_arg(char *script_path)
+ {
+ 	struct script_desc *desc;
+ 	int n_args = 0;
+ 	char *p;
+ 
+ 	desc = script_desc__new(NULL);
+ 
+ 	if (read_script_info(desc, script_path))
+ 		goto out;
+ 
+ 	if (!desc->args)
+ 		goto out;
+ 
+ 	for (p = desc->args; *p; p++)
+ 		if (*p == '<')
+ 			n_args++;
+ out:
+ 	script_desc__delete(desc);
+ 
+ 	return n_args;
+ }
+ 
+ static const char * const script_usage[] = {
+ 	"perf script [<options>]",
+ 	"perf script [<options>] record <script> [<record-options>] <command>",
+ 	"perf script [<options>] report <script> [script-args]",
+ 	"perf script [<options>] <script> [<record-options>] <command>",
+ 	"perf script [<options>] <top-script> [script-args]",
+ 	NULL
+ };
+ 
+ static const struct option options[] = {
+ 	OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+ 		    "dump raw trace in ASCII"),
+ 	OPT_INCR('v', "verbose", &verbose,
+ 		    "be more verbose (show symbol address, etc)"),
+ 	OPT_BOOLEAN('L', "Latency", &latency_format,
+ 		    "show latency attributes (irqs/preemption disabled, etc)"),
+ 	OPT_CALLBACK_NOOPT('l', "list", NULL, NULL, "list available scripts",
+ 			   list_available_scripts),
+ 	OPT_CALLBACK('s', "script", NULL, "name",
+ 		     "script file name (lang:script name, script name, or *)",
+ 		     parse_scriptname),
+ 	OPT_STRING('g', "gen-script", &generate_script_lang, "lang",
+ 		   "generate perf-script.xx script in specified language"),
+ 	OPT_STRING('i', "input", &input_name, "file",
+ 		    "input file name"),
+ 	OPT_BOOLEAN('d', "debug-mode", &debug_mode,
+ 		   "do various checks like samples ordering and lost events"),
+ 
+ 	OPT_END()
+ };
+ 
+ static bool have_cmd(int argc, const char **argv)
+ {
+ 	char **__argv = malloc(sizeof(const char *) * argc);
+ 
+ 	if (!__argv)
+ 		die("malloc");
+ 	memcpy(__argv, argv, sizeof(const char *) * argc);
+ 	argc = parse_options(argc, (const char **)__argv, record_options,
+ 			     NULL, PARSE_OPT_STOP_AT_NON_OPTION);
+ 	free(__argv);
+ 
+ 	return argc != 0;
+ }
+ 
+ int cmd_script(int argc, const char **argv, const char *prefix __used)
+ {
+ 	char *rec_script_path = NULL;
+ 	char *rep_script_path = NULL;
+ 	struct perf_session *session;
+ 	char *script_path = NULL;
+ 	const char **__argv;
+ 	bool system_wide;
+ 	int i, j, err;
+ 
+ 	setup_scripting();
+ 
+ 	argc = parse_options(argc, argv, options, script_usage,
+ 			     PARSE_OPT_STOP_AT_NON_OPTION);
+ 
+ 	if (argc > 1 && !strncmp(argv[0], "rec", strlen("rec"))) {
+ 		rec_script_path = get_script_path(argv[1], RECORD_SUFFIX);
+ 		if (!rec_script_path)
+ 			return cmd_record(argc, argv, NULL);
+ 	}
+ 
+ 	if (argc > 1 && !strncmp(argv[0], "rep", strlen("rep"))) {
+ 		rep_script_path = get_script_path(argv[1], REPORT_SUFFIX);
+ 		if (!rep_script_path) {
+ 			fprintf(stderr,
+ 				"Please specify a valid report script"
+ 				"(see 'perf script -l' for listing)\n");
+ 			return -1;
+ 		}
+ 	}
+ 
+ 	/* make sure PERF_EXEC_PATH is set for scripts */
+ 	perf_set_argv_exec_path(perf_exec_path());
+ 
+ 	if (argc && !script_name && !rec_script_path && !rep_script_path) {
+ 		int live_pipe[2];
+ 		int rep_args;
+ 		pid_t pid;
+ 
+ 		rec_script_path = get_script_path(argv[0], RECORD_SUFFIX);
+ 		rep_script_path = get_script_path(argv[0], REPORT_SUFFIX);
+ 
+ 		if (!rec_script_path && !rep_script_path) {
+ 			fprintf(stderr, " Couldn't find script %s\n\n See perf"
+ 				" script -l for available scripts.\n", argv[0]);
+ 			usage_with_options(script_usage, options);
+ 		}
+ 
+ 		if (is_top_script(argv[0])) {
+ 			rep_args = argc - 1;
+ 		} else {
+ 			int rec_args;
+ 
+ 			rep_args = has_required_arg(rep_script_path);
+ 			rec_args = (argc - 1) - rep_args;
+ 			if (rec_args < 0) {
+ 				fprintf(stderr, " %s script requires options."
+ 					"\n\n See perf script -l for available "
+ 					"scripts and options.\n", argv[0]);
+ 				usage_with_options(script_usage, options);
+ 			}
+ 		}
+ 
+ 		if (pipe(live_pipe) < 0) {
+ 			perror("failed to create pipe");
+ 			exit(-1);
+ 		}
+ 
+ 		pid = fork();
+ 		if (pid < 0) {
+ 			perror("failed to fork");
+ 			exit(-1);
+ 		}
+ 
+ 		if (!pid) {
+ 			system_wide = true;
+ 			j = 0;
+ 
+ 			dup2(live_pipe[1], 1);
+ 			close(live_pipe[0]);
+ 
+ 			if (!is_top_script(argv[0]))
+ 				system_wide = !have_cmd(argc - rep_args,
+ 							&argv[rep_args]);
+ 
+ 			__argv = malloc((argc + 6) * sizeof(const char *));
+ 			if (!__argv)
+ 				die("malloc");
+ 
+ 			__argv[j++] = "/bin/sh";
+ 			__argv[j++] = rec_script_path;
+ 			if (system_wide)
+ 				__argv[j++] = "-a";
+ 			__argv[j++] = "-q";
+ 			__argv[j++] = "-o";
+ 			__argv[j++] = "-";
+ 			for (i = rep_args + 1; i < argc; i++)
+ 				__argv[j++] = argv[i];
+ 			__argv[j++] = NULL;
+ 
+ 			execvp("/bin/sh", (char **)__argv);
+ 			free(__argv);
+ 			exit(-1);
+ 		}
+ 
+ 		dup2(live_pipe[0], 0);
+ 		close(live_pipe[1]);
+ 
+ 		__argv = malloc((argc + 4) * sizeof(const char *));
+ 		if (!__argv)
+ 			die("malloc");
+ 		j = 0;
+ 		__argv[j++] = "/bin/sh";
+ 		__argv[j++] = rep_script_path;
+ 		for (i = 1; i < rep_args + 1; i++)
+ 			__argv[j++] = argv[i];
+ 		__argv[j++] = "-i";
+ 		__argv[j++] = "-";
+ 		__argv[j++] = NULL;
+ 
+ 		execvp("/bin/sh", (char **)__argv);
+ 		free(__argv);
+ 		exit(-1);
+ 	}
+ 
+ 	if (rec_script_path)
+ 		script_path = rec_script_path;
+ 	if (rep_script_path)
+ 		script_path = rep_script_path;
+ 
+ 	if (script_path) {
+ 		system_wide = false;
+ 		j = 0;
+ 
+ 		if (rec_script_path)
+ 			system_wide = !have_cmd(argc - 1, &argv[1]);
+ 
+ 		__argv = malloc((argc + 2) * sizeof(const char *));
+ 		if (!__argv)
+ 			die("malloc");
+ 		__argv[j++] = "/bin/sh";
+ 		__argv[j++] = script_path;
+ 		if (system_wide)
+ 			__argv[j++] = "-a";
+ 		for (i = 2; i < argc; i++)
+ 			__argv[j++] = argv[i];
+ 		__argv[j++] = NULL;
+ 
+ 		execvp("/bin/sh", (char **)__argv);
+ 		free(__argv);
+ 		exit(-1);
+ 	}
+ 
+ 	if (symbol__init() < 0)
+ 		return -1;
+ 	if (!script_name)
+ 		setup_pager();
+ 
+ 	session = perf_session__new(input_name, O_RDONLY, 0, false);
+ 	if (session == NULL)
+ 		return -ENOMEM;
+ 
+ 	if (strcmp(input_name, "-") &&
+ 	    !perf_session__has_traces(session, "record -R"))
+ 		return -EINVAL;
+ 
+ 	if (generate_script_lang) {
+ 		struct stat perf_stat;
+ 
+ 		int input = open(input_name, O_RDONLY);
+ 		if (input < 0) {
+ 			perror("failed to open file");
+ 			exit(-1);
+ 		}
+ 
+ 		err = fstat(input, &perf_stat);
+ 		if (err < 0) {
+ 			perror("failed to stat file");
+ 			exit(-1);
+ 		}
+ 
+ 		if (!perf_stat.st_size) {
+ 			fprintf(stderr, "zero-sized file, nothing to do!\n");
+ 			exit(0);
+ 		}
+ 
+ 		scripting_ops = script_spec__lookup(generate_script_lang);
+ 		if (!scripting_ops) {
+ 			fprintf(stderr, "invalid language specifier");
+ 			return -1;
+ 		}
+ 
+ 		err = scripting_ops->generate_script("perf-script");
+ 		goto out;
+ 	}
+ 
+ 	if (script_name) {
+ 		err = scripting_ops->start_script(script_name, argc, argv);
+ 		if (err)
+ 			goto out;
+ 		pr_debug("perf script started with script %s\n\n", script_name);
+ 	}
+ 
+ 	err = __cmd_script(session);
+ 
+ 	perf_session__delete(session);
+ 	cleanup_scripting();
+ out:
+ 	return err;
+ }
diff --cc tools/perf/command-list.txt
index 949d77fc0b97,949d77fc0b97..16b5088cf8f4
--- a/tools/perf/command-list.txt
+++ b/tools/perf/command-list.txt
@@@ -16,7 -16,7 +16,7 @@@ perf-report			mainporcelain commo
  perf-stat			mainporcelain common
  perf-timechart			mainporcelain common
  perf-top			mainporcelain common
--perf-trace			mainporcelain common
++perf-script			mainporcelain common
  perf-probe			mainporcelain common
  perf-kmem			mainporcelain common
  perf-lock			mainporcelain common