X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=tools%2Fperf%2Fbuiltin-trace.c;h=dddf3f01b5ab3c91db25611ac4a2ed6c5adcf064;hb=3be2264be3c00865116f997dc53ebcc90fe7fc4b;hp=0c5e4f72f2bae827ee0456f7362aff1f0ad20a91;hpb=d4c3768faaae70cdcffc3a5e296bd99edfa7ddb2;p=safe%2Fjmp%2Flinux-2.6

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 0c5e4f7..dddf3f0 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -5,259 +5,525 @@
 #include "util/symbol.h"
 #include "util/thread.h"
 #include "util/header.h"
+#include "util/exec_cmd.h"
+#include "util/trace-event.h"
+#include "util/session.h"
 
-#include "util/parse-options.h"
+static char const		*script_name;
+static char const		*generate_script_lang;
+static bool			debug_ordering;
+static u64			last_timestamp;
 
-#include "perf.h"
-#include "util/debug.h"
+static int default_start_script(const char *script __unused,
+				int argc __unused,
+				const char **argv __unused)
+{
+	return 0;
+}
 
-#include "util/trace-event.h"
+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)
+{
+	/* make sure PERF_EXEC_PATH is set for scripts */
+	perf_set_argv_exec_path(perf_exec_path());
 
-static char		const *input_name = "perf.data";
-static int		input;
-static unsigned long	page_size;
-static unsigned long	mmap_window = 32;
+	setup_perl_scripting();
+	setup_python_scripting();
 
-static unsigned long	total = 0;
-static unsigned long	total_comm = 0;
+	scripting_ops = &default_scripting_ops;
+}
+
+static int cleanup_scripting(void)
+{
+	pr_debug("\nperf trace script stopped\n");
+
+	return scripting_ops->stop_script();
+}
 
-static struct rb_root	threads;
-static struct thread	*last_match;
+#include "util/parse-options.h"
 
-static struct perf_header *header;
-static u64		sample_type;
+#include "perf.h"
+#include "util/debug.h"
+
+#include "util/trace-event.h"
+#include "util/exec_cmd.h"
 
+static char const		*input_name = "perf.data";
 
-static int
-process_comm_event(event_t *event, unsigned long offset, unsigned long head)
+static int process_sample_event(event_t *event, struct perf_session *session)
 {
+	struct sample_data data;
 	struct thread *thread;
 
-	thread = threads__findnew(event->comm.pid, &threads, &last_match);
+	memset(&data, 0, sizeof(data));
+	data.time = -1;
+	data.cpu = -1;
+	data.period = 1;
 
-	dump_printf("%p [%p]: PERF_RECORD_COMM: %s:%d\n",
-		(void *)(offset + head),
-		(void *)(long)(event->header.size),
-		event->comm.comm, event->comm.pid);
+	event__parse_sample(event, session->sample_type, &data);
 
-	if (thread == NULL ||
-	    thread__set_comm(thread, event->comm.comm)) {
-		dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
+	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;
 	}
-	total_comm++;
 
+	if (session->sample_type & PERF_SAMPLE_RAW) {
+		if (debug_ordering) {
+			if (data.time < last_timestamp) {
+				pr_err("Samples misordered, previous: %llu "
+					"this: %llu\n", last_timestamp,
+					data.time);
+			}
+			last_timestamp = data.time;
+		}
+		/*
+		 * 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 int
-process_sample_event(event_t *event, unsigned long offset, unsigned long head)
+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,
+	.ordered_samples = true,
+};
+
+extern volatile int session_done;
+
+static void sig_handler(int sig __unused)
+{
+	session_done = 1;
+}
+
+static int __cmd_trace(struct perf_session *session)
 {
-	char level;
-	int show = 0;
-	struct dso *dso = NULL;
-	struct thread *thread;
-	u64 ip = event->ip.ip;
-	u64 timestamp = -1;
-	u32 cpu = -1;
-	u64 period = 1;
-	void *more_data = event->ip.__more_data;
-	int cpumode;
-
-	thread = threads__findnew(event->ip.pid, &threads, &last_match);
-
-	if (sample_type & PERF_SAMPLE_TIME) {
-		timestamp = *(u64 *)more_data;
-		more_data += sizeof(u64);
-	}
+	signal(SIGINT, sig_handler);
 
-	if (sample_type & PERF_SAMPLE_CPU) {
-		cpu = *(u32 *)more_data;
-		more_data += sizeof(u32);
-		more_data += sizeof(u32); /* reserved */
-	}
+	return perf_session__process_events(session, &event_ops);
+}
 
-	if (sample_type & PERF_SAMPLE_PERIOD) {
-		period = *(u64 *)more_data;
-		more_data += sizeof(u64);
-	}
+struct script_spec {
+	struct list_head	node;
+	struct scripting_ops	*ops;
+	char			spec[0];
+};
 
-	dump_printf("%p [%p]: PERF_RECORD_SAMPLE (IP, %d): %d/%d: %p period: %Ld\n",
-		(void *)(offset + head),
-		(void *)(long)(event->header.size),
-		event->header.misc,
-		event->ip.pid, event->ip.tid,
-		(void *)(long)ip,
-		(long long)period);
+LIST_HEAD(script_specs);
 
-	dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
+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 (thread == NULL) {
-		eprintf("problem processing %d event, skipping it.\n",
-			event->header.type);
-		return -1;
+	if (s != NULL) {
+		strcpy(s->spec, spec);
+		s->ops = ops;
 	}
 
-	cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
+	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;
 
-	if (cpumode == PERF_RECORD_MISC_KERNEL) {
-		show = SHOW_KERNEL;
-		level = 'k';
+	list_for_each_entry(s, &script_specs, node)
+		if (strcasecmp(s->spec, spec) == 0)
+			return s;
+	return NULL;
+}
 
-		dso = kernel_dso;
+static struct script_spec *script_spec__findnew(const char *spec,
+						struct scripting_ops *ops)
+{
+	struct script_spec *s = script_spec__find(spec);
 
-		dump_printf(" ...... dso: %s\n", dso->name);
+	if (s)
+		return s;
 
-	} else if (cpumode == PERF_RECORD_MISC_USER) {
+	s = script_spec__new(spec, ops);
+	if (!s)
+		goto out_delete_spec;
 
-		show = SHOW_USER;
-		level = '.';
+	script_spec__add(s);
 
-	} else {
-		show = SHOW_HV;
-		level = 'H';
+	return s;
 
-		dso = hypervisor_dso;
+out_delete_spec:
+	script_spec__delete(s);
 
-		dump_printf(" ...... dso: [hypervisor]\n");
-	}
+	return NULL;
+}
 
-	if (sample_type & PERF_SAMPLE_RAW) {
-		struct {
-			u32 size;
-			char data[0];
-		} *raw = more_data;
+int script_spec_register(const char *spec, struct scripting_ops *ops)
+{
+	struct script_spec *s;
 
-		/*
-		 * FIXME: better resolve from pid from the struct trace_entry
-		 * field, although it should be the same than this perf
-		 * event pid
-		 */
-		print_event(cpu, raw->data, raw->size, timestamp, thread->comm);
-	}
-	total += period;
+	s = script_spec__find(spec);
+	if (s)
+		return -1;
+
+	s = script_spec__findnew(spec, ops);
+	if (!s)
+		return -1;
 
 	return 0;
 }
 
-static int
-process_event(event_t *event, unsigned long offset, unsigned long head)
+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)
 {
-	trace_event(event);
+	struct script_spec *s;
 
-	switch (event->header.type) {
-	case PERF_RECORD_MMAP ... PERF_RECORD_LOST:
-		return 0;
+	fprintf(stderr, "\n");
+	fprintf(stderr, "Scripting language extensions (used in "
+		"perf trace -s [spec:]script.[spec]):\n\n");
 
-	case PERF_RECORD_COMM:
-		return process_comm_event(event, offset, head);
+	list_for_each_entry(s, &script_specs, node)
+		fprintf(stderr, "  %-42s [%s]\n", s->spec, s->ops->name);
 
-	case PERF_RECORD_EXIT ... PERF_RECORD_READ:
-		return 0;
+	fprintf(stderr, "\n");
+}
 
-	case PERF_RECORD_SAMPLE:
-		return process_sample_event(event, offset, head);
+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;
 
-	case PERF_RECORD_MAX:
-	default:
-		return -1;
+	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 = strchr(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;
 }
 
-static int __cmd_trace(void)
+#define for_each_lang(scripts_dir, lang_dirent, lang_next)		\
+	while (!readdir_r(scripts_dir, &lang_dirent, &lang_next) &&	\
+	       lang_next)						\
+		if (lang_dirent.d_type == DT_DIR &&			\
+		    (strcmp(lang_dirent.d_name, ".")) &&		\
+		    (strcmp(lang_dirent.d_name, "..")))
+
+#define for_each_script(lang_dir, script_dirent, script_next)		\
+	while (!readdir_r(lang_dir, &script_dirent, &script_next) &&	\
+	       script_next)						\
+		if (script_dirent.d_type != DT_DIR)
+
+
+#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)
 {
-	int ret, rc = EXIT_FAILURE;
-	unsigned long offset = 0;
-	unsigned long head = 0;
-	struct stat perf_stat;
-	event_t *event;
-	uint32_t size;
-	char *buf;
-
-	trace_report();
-	register_idle_thread(&threads, &last_match);
-
-	input = open(input_name, O_RDONLY);
-	if (input < 0) {
-		perror("failed to open file");
-		exit(-1);
-	}
+	struct script_desc *s = zalloc(sizeof(*s));
 
-	ret = fstat(input, &perf_stat);
-	if (ret < 0) {
-		perror("failed to stat file");
-		exit(-1);
-	}
+	if (s != NULL)
+		s->name = strdup(name);
 
-	if (!perf_stat.st_size) {
-		fprintf(stderr, "zero-sized file, nothing to do!\n");
-		exit(0);
-	}
-	header = perf_header__read(input);
-	head = header->data_offset;
-	sample_type = perf_header__sample_type(header);
+	return s;
+}
+
+static void script_desc__delete(struct script_desc *s)
+{
+	free(s->name);
+	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;
 
-	if (!(sample_type & PERF_SAMPLE_RAW))
-		die("No trace sample to read. Did you call perf record "
-		    "without -R?");
+out_delete_desc:
+	script_desc__delete(s);
 
-	if (load_kernel() < 0) {
-		perror("failed to load kernel symbols");
-		return EXIT_FAILURE;
+	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;
 	}
 
-remap:
-	buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
-			   MAP_SHARED, input, offset);
-	if (buf == MAP_FAILED) {
-		perror("failed to mmap file");
-		exit(-1);
+	return NULL;
+}
+
+static char *ltrim(char *str)
+{
+	int len = strlen(str);
+
+	while (len && isspace(*str)) {
+		len--;
+		str++;
 	}
 
-more:
-	event = (event_t *)(buf + head);
+	return str;
+}
 
-	if (head + event->header.size >= page_size * mmap_window) {
-		unsigned long shift = page_size * (head / page_size);
-		int res;
+static int read_script_info(struct script_desc *desc, const char *filename)
+{
+	char line[BUFSIZ], *p;
+	FILE *fp;
 
-		res = munmap(buf, page_size * mmap_window);
-		assert(res == 0);
+	fp = fopen(filename, "r");
+	if (!fp)
+		return -1;
 
-		offset += shift;
-		head -= shift;
-		goto remap;
+	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;
+		}
 	}
 
-	size = event->header.size;
-
-	if (!size || process_event(event, offset, head) < 0) {
+	fclose(fp);
 
-		/*
-		 * assume we lost track of the stream, check alignment, and
-		 * increment a single u64 in the hope to catch on again 'soon'.
-		 */
+	return 0;
+}
 
-		if (unlikely(head & 7))
-			head &= ~7ULL;
+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;
 
-		size = 8;
+	for_each_lang(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) {
+			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);
+		}
 	}
 
-	head += size;
+	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 : "");
+	}
 
-	if (offset + head < (unsigned long)perf_stat.st_size)
-		goto more;
+	exit(0);
+}
 
-	rc = EXIT_SUCCESS;
-	close(input);
+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) {
+		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) {
+			__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 rc;
+	return path;
 }
 
-static const char * const annotate_usage[] = {
+static const char * const trace_usage[] = {
 	"perf trace [<options>] <command>",
 	NULL
 };
@@ -265,27 +531,187 @@ static const char * const annotate_usage[] = {
 static const struct option options[] = {
 	OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
 		    "dump raw trace in ASCII"),
-	OPT_BOOLEAN('v', "verbose", &verbose,
+	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-trace.xx script in specified language"),
+	OPT_STRING('i', "input", &input_name, "file",
+		    "input file name"),
+	OPT_BOOLEAN('d', "debug-ordering", &debug_ordering,
+		   "check that samples time ordering is monotonic"),
+
 	OPT_END()
 };
 
 int cmd_trace(int argc, const char **argv, const char *prefix __used)
 {
-	symbol__init();
-	page_size = getpagesize();
+	struct perf_session *session;
+	const char *suffix = NULL;
+	const char **__argv;
+	char *script_path;
+	int i, err;
+
+	if (argc >= 2 && strncmp(argv[1], "rec", strlen("rec")) == 0) {
+		if (argc < 3) {
+			fprintf(stderr,
+				"Please specify a record script\n");
+			return -1;
+		}
+		suffix = RECORD_SUFFIX;
+	}
 
-	argc = parse_options(argc, argv, options, annotate_usage, 0);
-	if (argc) {
-		/*
-		 * Special case: if there's an argument left then assume tha
-		 * it's a symbol filter:
-		 */
-		if (argc > 1)
-			usage_with_options(annotate_usage, options);
+	if (argc >= 2 && strncmp(argv[1], "rep", strlen("rep")) == 0) {
+		if (argc < 3) {
+			fprintf(stderr,
+				"Please specify a report script\n");
+			return -1;
+		}
+		suffix = REPORT_SUFFIX;
+	}
+
+	if (!suffix && argc >= 2 && strncmp(argv[1], "-", strlen("-")) != 0) {
+		char *record_script_path, *report_script_path;
+		int live_pipe[2];
+		pid_t pid;
+
+		record_script_path = get_script_path(argv[1], RECORD_SUFFIX);
+		if (!record_script_path) {
+			fprintf(stderr, "record script not found\n");
+			return -1;
+		}
+
+		report_script_path = get_script_path(argv[1], REPORT_SUFFIX);
+		if (!report_script_path) {
+			fprintf(stderr, "report script not found\n");
+			return -1;
+		}
+
+		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) {
+			dup2(live_pipe[1], 1);
+			close(live_pipe[0]);
+
+			__argv = malloc(5 * sizeof(const char *));
+			__argv[0] = "/bin/sh";
+			__argv[1] = record_script_path;
+			__argv[2] = "-o";
+			__argv[3] = "-";
+			__argv[4] = NULL;
+
+			execvp("/bin/sh", (char **)__argv);
+			exit(-1);
+		}
+
+		dup2(live_pipe[0], 0);
+		close(live_pipe[1]);
+
+		__argv = malloc((argc + 3) * sizeof(const char *));
+		__argv[0] = "/bin/sh";
+		__argv[1] = report_script_path;
+		for (i = 2; i < argc; i++)
+			__argv[i] = argv[i];
+		__argv[i++] = "-i";
+		__argv[i++] = "-";
+		__argv[i++] = NULL;
+
+		execvp("/bin/sh", (char **)__argv);
+		exit(-1);
+	}
+
+	if (suffix) {
+		script_path = get_script_path(argv[2], suffix);
+		if (!script_path) {
+			fprintf(stderr, "script not found\n");
+			return -1;
+		}
+
+		__argv = malloc((argc + 1) * sizeof(const char *));
+		__argv[0] = "/bin/sh";
+		__argv[1] = script_path;
+		for (i = 3; i < argc; i++)
+			__argv[i - 1] = argv[i];
+		__argv[argc - 1] = NULL;
+
+		execvp("/bin/sh", (char **)__argv);
+		exit(-1);
+	}
+
+	setup_scripting();
+
+	argc = parse_options(argc, argv, options, trace_usage,
+			     PARSE_OPT_STOP_AT_NON_OPTION);
+
+	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-trace");
+		goto out;
+	}
+
+	if (script_name) {
+		err = scripting_ops->start_script(script_name, argc, argv);
+		if (err)
+			goto out;
+		pr_debug("perf trace started with script %s\n\n", script_name);
 	}
 
-	setup_pager();
+	err = __cmd_trace(session);
 
-	return __cmd_trace();
+	perf_session__delete(session);
+	cleanup_scripting();
+out:
+	return err;
 }