builtin-script.c 32.9 KB
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#include "builtin.h"

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#include "perf.h"
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#include "util/cache.h"
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#include "util/debug.h"
#include "util/exec_cmd.h"
#include "util/header.h"
#include "util/parse-options.h"
#include "util/session.h"
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#include "util/tool.h"
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#include "util/symbol.h"
#include "util/thread.h"
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#include "util/trace-event.h"
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#include "util/util.h"
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#include "util/evlist.h"
#include "util/evsel.h"
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#include <linux/bitmap.h>
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static char const		*script_name;
static char const		*generate_script_lang;
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static bool			debug_mode;
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static u64			last_timestamp;
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static u64			nr_unordered;
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extern const struct option	record_options[];
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static bool			no_callchain;
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static bool			show_full_info;
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static bool			system_wide;
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static const char		*cpu_list;
static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
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enum perf_output_field {
	PERF_OUTPUT_COMM            = 1U << 0,
	PERF_OUTPUT_TID             = 1U << 1,
	PERF_OUTPUT_PID             = 1U << 2,
	PERF_OUTPUT_TIME            = 1U << 3,
	PERF_OUTPUT_CPU             = 1U << 4,
	PERF_OUTPUT_EVNAME          = 1U << 5,
	PERF_OUTPUT_TRACE           = 1U << 6,
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	PERF_OUTPUT_IP              = 1U << 7,
	PERF_OUTPUT_SYM             = 1U << 8,
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	PERF_OUTPUT_DSO             = 1U << 9,
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	PERF_OUTPUT_ADDR            = 1U << 10,
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	PERF_OUTPUT_SYMOFFSET       = 1U << 11,
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};

struct output_option {
	const char *str;
	enum perf_output_field field;
} all_output_options[] = {
	{.str = "comm",  .field = PERF_OUTPUT_COMM},
	{.str = "tid",   .field = PERF_OUTPUT_TID},
	{.str = "pid",   .field = PERF_OUTPUT_PID},
	{.str = "time",  .field = PERF_OUTPUT_TIME},
	{.str = "cpu",   .field = PERF_OUTPUT_CPU},
	{.str = "event", .field = PERF_OUTPUT_EVNAME},
	{.str = "trace", .field = PERF_OUTPUT_TRACE},
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	{.str = "ip",    .field = PERF_OUTPUT_IP},
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	{.str = "sym",   .field = PERF_OUTPUT_SYM},
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	{.str = "dso",   .field = PERF_OUTPUT_DSO},
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	{.str = "addr",  .field = PERF_OUTPUT_ADDR},
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	{.str = "symoff", .field = PERF_OUTPUT_SYMOFFSET},
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};

/* default set to maintain compatibility with current format */
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static struct {
	bool user_set;
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	bool wildcard_set;
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	u64 fields;
	u64 invalid_fields;
} output[PERF_TYPE_MAX] = {

	[PERF_TYPE_HARDWARE] = {
		.user_set = false,

		.fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
			      PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
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			      PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
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				  PERF_OUTPUT_SYM | PERF_OUTPUT_DSO,
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		.invalid_fields = PERF_OUTPUT_TRACE,
	},

	[PERF_TYPE_SOFTWARE] = {
		.user_set = false,

		.fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
			      PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
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			      PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
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				  PERF_OUTPUT_SYM | PERF_OUTPUT_DSO,
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		.invalid_fields = PERF_OUTPUT_TRACE,
	},

	[PERF_TYPE_TRACEPOINT] = {
		.user_set = false,

		.fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
				  PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
				  PERF_OUTPUT_EVNAME | PERF_OUTPUT_TRACE,
	},
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	[PERF_TYPE_RAW] = {
		.user_set = false,

		.fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
			      PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
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			      PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
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				  PERF_OUTPUT_SYM | PERF_OUTPUT_DSO,
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		.invalid_fields = PERF_OUTPUT_TRACE,
	},
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};
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static bool output_set_by_user(void)
{
	int j;
	for (j = 0; j < PERF_TYPE_MAX; ++j) {
		if (output[j].user_set)
			return true;
	}
	return false;
}
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static const char *output_field2str(enum perf_output_field field)
{
	int i, imax = ARRAY_SIZE(all_output_options);
	const char *str = "";

	for (i = 0; i < imax; ++i) {
		if (all_output_options[i].field == field) {
			str = all_output_options[i].str;
			break;
		}
	}
	return str;
}

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#define PRINT_FIELD(x)  (output[attr->type].fields & PERF_OUTPUT_##x)
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static int perf_evsel__check_stype(struct perf_evsel *evsel,
				   u64 sample_type, const char *sample_msg,
				   enum perf_output_field field)
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{
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	struct perf_event_attr *attr = &evsel->attr;
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	int type = attr->type;
	const char *evname;

	if (attr->sample_type & sample_type)
		return 0;

	if (output[type].user_set) {
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		evname = perf_evsel__name(evsel);
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		pr_err("Samples for '%s' event do not have %s attribute set. "
		       "Cannot print '%s' field.\n",
		       evname, sample_msg, output_field2str(field));
		return -1;
	}

	/* user did not ask for it explicitly so remove from the default list */
	output[type].fields &= ~field;
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	evname = perf_evsel__name(evsel);
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	pr_debug("Samples for '%s' event do not have %s attribute set. "
		 "Skipping '%s' field.\n",
		 evname, sample_msg, output_field2str(field));

	return 0;
}

static int perf_evsel__check_attr(struct perf_evsel *evsel,
				  struct perf_session *session)
{
	struct perf_event_attr *attr = &evsel->attr;

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	if (PRINT_FIELD(TRACE) &&
		!perf_session__has_traces(session, "record -R"))
		return -EINVAL;

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	if (PRINT_FIELD(IP)) {
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		if (perf_evsel__check_stype(evsel, PERF_SAMPLE_IP, "IP",
					    PERF_OUTPUT_IP))
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			return -EINVAL;
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		if (!no_callchain &&
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		    !(attr->sample_type & PERF_SAMPLE_CALLCHAIN))
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			symbol_conf.use_callchain = false;
	}
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	if (PRINT_FIELD(ADDR) &&
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		perf_evsel__check_stype(evsel, PERF_SAMPLE_ADDR, "ADDR",
					PERF_OUTPUT_ADDR))
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		return -EINVAL;

	if (PRINT_FIELD(SYM) && !PRINT_FIELD(IP) && !PRINT_FIELD(ADDR)) {
		pr_err("Display of symbols requested but neither sample IP nor "
			   "sample address\nis selected. Hence, no addresses to convert "
		       "to symbols.\n");
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		return -EINVAL;
	}
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	if (PRINT_FIELD(SYMOFFSET) && !PRINT_FIELD(SYM)) {
		pr_err("Display of offsets requested but symbol is not"
		       "selected.\n");
		return -EINVAL;
	}
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	if (PRINT_FIELD(DSO) && !PRINT_FIELD(IP) && !PRINT_FIELD(ADDR)) {
		pr_err("Display of DSO requested but neither sample IP nor "
			   "sample address\nis selected. Hence, no addresses to convert "
		       "to DSO.\n");
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		return -EINVAL;
	}
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	if ((PRINT_FIELD(PID) || PRINT_FIELD(TID)) &&
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		perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID",
					PERF_OUTPUT_TID|PERF_OUTPUT_PID))
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		return -EINVAL;

	if (PRINT_FIELD(TIME) &&
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		perf_evsel__check_stype(evsel, PERF_SAMPLE_TIME, "TIME",
					PERF_OUTPUT_TIME))
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		return -EINVAL;

	if (PRINT_FIELD(CPU) &&
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		perf_evsel__check_stype(evsel, PERF_SAMPLE_CPU, "CPU",
					PERF_OUTPUT_CPU))
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		return -EINVAL;
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	return 0;
}

/*
 * verify all user requested events exist and the samples
 * have the expected data
 */
static int perf_session__check_output_opt(struct perf_session *session)
{
	int j;
	struct perf_evsel *evsel;

	for (j = 0; j < PERF_TYPE_MAX; ++j) {
		evsel = perf_session__find_first_evtype(session, j);

		/*
		 * even if fields is set to 0 (ie., show nothing) event must
		 * exist if user explicitly includes it on the command line
		 */
		if (!evsel && output[j].user_set && !output[j].wildcard_set) {
			pr_err("%s events do not exist. "
			       "Remove corresponding -f option to proceed.\n",
			       event_type(j));
			return -1;
		}

		if (evsel && output[j].fields &&
			perf_evsel__check_attr(evsel, session))
			return -1;
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	}

	return 0;
}
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static void print_sample_start(struct perf_sample *sample,
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			       struct thread *thread,
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			       struct perf_evsel *evsel)
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{
	int type;
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	struct perf_event_attr *attr = &evsel->attr;
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	struct event_format *event;
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	const char *evname = NULL;
	unsigned long secs;
	unsigned long usecs;
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	unsigned long long nsecs;

	if (PRINT_FIELD(COMM)) {
		if (latency_format)
			printf("%8.8s ", thread->comm);
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		else if (PRINT_FIELD(IP) && symbol_conf.use_callchain)
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			printf("%s ", thread->comm);
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		else
			printf("%16s ", thread->comm);
	}
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	if (PRINT_FIELD(PID) && PRINT_FIELD(TID))
		printf("%5d/%-5d ", sample->pid, sample->tid);
	else if (PRINT_FIELD(PID))
		printf("%5d ", sample->pid);
	else if (PRINT_FIELD(TID))
		printf("%5d ", sample->tid);

	if (PRINT_FIELD(CPU)) {
		if (latency_format)
			printf("%3d ", sample->cpu);
		else
			printf("[%03d] ", sample->cpu);
	}
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	if (PRINT_FIELD(TIME)) {
		nsecs = sample->time;
		secs = nsecs / NSECS_PER_SEC;
		nsecs -= secs * NSECS_PER_SEC;
		usecs = nsecs / NSECS_PER_USEC;
		printf("%5lu.%06lu: ", secs, usecs);
	}
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	if (PRINT_FIELD(EVNAME)) {
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		if (attr->type == PERF_TYPE_TRACEPOINT) {
			type = trace_parse_common_type(sample->raw_data);
			event = trace_find_event(type);
			if (event)
				evname = event->name;
		} else
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			evname = perf_evsel__name(evsel);
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		printf("%s: ", evname ? evname : "[unknown]");
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	}
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}

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static bool is_bts_event(struct perf_event_attr *attr)
{
	return ((attr->type == PERF_TYPE_HARDWARE) &&
		(attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
		(attr->sample_period == 1));
}

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static bool sample_addr_correlates_sym(struct perf_event_attr *attr)
{
	if ((attr->type == PERF_TYPE_SOFTWARE) &&
	    ((attr->config == PERF_COUNT_SW_PAGE_FAULTS) ||
	     (attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN) ||
	     (attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)))
		return true;

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	if (is_bts_event(attr))
		return true;

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	return false;
}

static void print_sample_addr(union perf_event *event,
			  struct perf_sample *sample,
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			  struct machine *machine,
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			  struct thread *thread,
			  struct perf_event_attr *attr)
{
	struct addr_location al;
	u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;

	printf("%16" PRIx64, sample->addr);

	if (!sample_addr_correlates_sym(attr))
		return;

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	thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
			      sample->addr, &al);
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	if (!al.map)
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		thread__find_addr_map(thread, machine, cpumode, MAP__VARIABLE,
				      sample->addr, &al);
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	al.cpu = sample->cpu;
	al.sym = NULL;

	if (al.map)
		al.sym = map__find_symbol(al.map, al.addr, NULL);

	if (PRINT_FIELD(SYM)) {
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		printf(" ");
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		if (PRINT_FIELD(SYMOFFSET))
			symbol__fprintf_symname_offs(al.sym, &al, stdout);
		else
			symbol__fprintf_symname(al.sym, stdout);
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	}

	if (PRINT_FIELD(DSO)) {
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		printf(" (");
		map__fprintf_dsoname(al.map, stdout);
		printf(")");
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	}
}

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static void print_sample_bts(union perf_event *event,
			     struct perf_sample *sample,
			     struct perf_evsel *evsel,
			     struct machine *machine,
			     struct thread *thread)
{
	struct perf_event_attr *attr = &evsel->attr;

	/* print branch_from information */
	if (PRINT_FIELD(IP)) {
		if (!symbol_conf.use_callchain)
			printf(" ");
		else
			printf("\n");
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		perf_event__print_ip(event, sample, machine,
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				     PRINT_FIELD(SYM), PRINT_FIELD(DSO),
				     PRINT_FIELD(SYMOFFSET));
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	}

	printf(" => ");

	/* print branch_to information */
	if (PRINT_FIELD(ADDR))
		print_sample_addr(event, sample, machine, thread, attr);

	printf("\n");
}

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static void process_event(union perf_event *event __unused,
			  struct perf_sample *sample,
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			  struct perf_evsel *evsel,
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			  struct machine *machine,
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			  struct thread *thread)
{
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	struct perf_event_attr *attr = &evsel->attr;
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	if (output[attr->type].fields == 0)
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		return;

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	print_sample_start(sample, thread, evsel);
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	if (is_bts_event(attr)) {
		print_sample_bts(event, sample, evsel, machine, thread);
		return;
	}

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	if (PRINT_FIELD(TRACE))
		print_trace_event(sample->cpu, sample->raw_data,
				  sample->raw_size);

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	if (PRINT_FIELD(ADDR))
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		print_sample_addr(event, sample, machine, thread, attr);
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	if (PRINT_FIELD(IP)) {
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		if (!symbol_conf.use_callchain)
			printf(" ");
		else
			printf("\n");
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		perf_event__print_ip(event, sample, machine,
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				     PRINT_FIELD(SYM), PRINT_FIELD(DSO),
				     PRINT_FIELD(SYMOFFSET));
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	}

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	printf("\n");
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}

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static int default_start_script(const char *script __unused,
				int argc __unused,
				const char **argv __unused)
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{
	return 0;
}

static int default_stop_script(void)
{
	return 0;
}

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static int default_generate_script(const char *outfile __unused)
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{
	return 0;
}

static struct scripting_ops default_scripting_ops = {
	.start_script		= default_start_script,
	.stop_script		= default_stop_script,
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	.process_event		= process_event,
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	.generate_script	= default_generate_script,
};

static struct scripting_ops	*scripting_ops;

static void setup_scripting(void)
{
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	setup_perl_scripting();
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	setup_python_scripting();
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	scripting_ops = &default_scripting_ops;
}

static int cleanup_scripting(void)
{
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	pr_debug("\nperf script stopped\n");
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	return scripting_ops->stop_script();
}

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static const char *input_name;
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static int process_sample_event(struct perf_tool *tool __used,
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				union perf_event *event,
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				struct perf_sample *sample,
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				struct perf_evsel *evsel,
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				struct machine *machine)
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{
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	struct addr_location al;
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	struct thread *thread = machine__findnew_thread(machine, event->ip.tid);
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	if (thread == NULL) {
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		pr_debug("problem processing %d event, skipping it.\n",
			 event->header.type);
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		return -1;
	}

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	if (debug_mode) {
		if (sample->time < last_timestamp) {
			pr_err("Samples misordered, previous: %" PRIu64
				" this: %" PRIu64 "\n", last_timestamp,
				sample->time);
			nr_unordered++;
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		}
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		last_timestamp = sample->time;
		return 0;
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	}
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	if (perf_event__preprocess_sample(event, machine, &al, sample, 0) < 0) {
		pr_err("problem processing %d event, skipping it.\n",
		       event->header.type);
		return -1;
	}

	if (al.filtered)
		return 0;

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	if (cpu_list && !test_bit(sample->cpu, cpu_bitmap))
		return 0;

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	scripting_ops->process_event(event, sample, evsel, machine, thread);
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	evsel->hists.stats.total_period += sample->period;
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	return 0;
}

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static struct perf_tool perf_script = {
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	.sample		 = process_sample_event,
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	.mmap		 = perf_event__process_mmap,
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	.comm		 = perf_event__process_comm,
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	.exit		 = perf_event__process_task,
	.fork		 = perf_event__process_task,
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	.attr		 = perf_event__process_attr,
	.event_type	 = perf_event__process_event_type,
	.tracing_data	 = perf_event__process_tracing_data,
	.build_id	 = perf_event__process_build_id,
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	.ordered_samples = true,
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	.ordering_requires_timestamps = true,
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};

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extern volatile int session_done;

static void sig_handler(int sig __unused)
{
	session_done = 1;
}

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static int __cmd_script(struct perf_session *session)
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{
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	int ret;

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	signal(SIGINT, sig_handler);

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	ret = perf_session__process_events(session, &perf_script);
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	if (debug_mode)
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		pr_err("Misordered timestamps: %" PRIu64 "\n", nr_unordered);
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	return ret;
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}

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struct script_spec {
	struct list_head	node;
	struct scripting_ops	*ops;
	char			spec[0];
};

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static LIST_HEAD(script_specs);
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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__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)
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		return NULL;
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	script_spec__add(s);

	return s;
}

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 "
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		"perf script -s [spec:]script.[spec]):\n\n");
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	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;

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	if (strcmp(str, "lang") == 0) {
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		list_available_languages();
666
		exit(0);
T
Tom Zanussi 已提交
667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685
	}

	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;
686
		ext = strrchr(script, '.');
T
Tom Zanussi 已提交
687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702
		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;
}

703 704 705 706 707
static int parse_output_fields(const struct option *opt __used,
			    const char *arg, int unset __used)
{
	char *tok;
	int i, imax = sizeof(all_output_options) / sizeof(struct output_option);
708
	int j;
709 710
	int rc = 0;
	char *str = strdup(arg);
711
	int type = -1;
712 713 714 715

	if (!str)
		return -ENOMEM;

716 717 718
	/* first word can state for which event type the user is specifying
	 * the fields. If no type exists, the specified fields apply to all
	 * event types found in the file minus the invalid fields for a type.
719
	 */
720 721 722 723 724 725 726 727 728 729
	tok = strchr(str, ':');
	if (tok) {
		*tok = '\0';
		tok++;
		if (!strcmp(str, "hw"))
			type = PERF_TYPE_HARDWARE;
		else if (!strcmp(str, "sw"))
			type = PERF_TYPE_SOFTWARE;
		else if (!strcmp(str, "trace"))
			type = PERF_TYPE_TRACEPOINT;
730 731
		else if (!strcmp(str, "raw"))
			type = PERF_TYPE_RAW;
732 733
		else {
			fprintf(stderr, "Invalid event type in field string.\n");
734 735
			rc = -EINVAL;
			goto out;
736 737 738 739 740 741 742 743
		}

		if (output[type].user_set)
			pr_warning("Overriding previous field request for %s events.\n",
				   event_type(type));

		output[type].fields = 0;
		output[type].user_set = true;
744
		output[type].wildcard_set = false;
745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760

	} else {
		tok = str;
		if (strlen(str) == 0) {
			fprintf(stderr,
				"Cannot set fields to 'none' for all event types.\n");
			rc = -EINVAL;
			goto out;
		}

		if (output_set_by_user())
			pr_warning("Overriding previous field request for all events.\n");

		for (j = 0; j < PERF_TYPE_MAX; ++j) {
			output[j].fields = 0;
			output[j].user_set = true;
761
			output[j].wildcard_set = true;
762
		}
763 764
	}

765 766
	tok = strtok(tok, ",");
	while (tok) {
767
		for (i = 0; i < imax; ++i) {
768
			if (strcmp(tok, all_output_options[i].str) == 0)
769 770 771
				break;
		}
		if (i == imax) {
772
			fprintf(stderr, "Invalid field requested.\n");
773
			rc = -EINVAL;
774
			goto out;
775 776
		}

777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799
		if (type == -1) {
			/* add user option to all events types for
			 * which it is valid
			 */
			for (j = 0; j < PERF_TYPE_MAX; ++j) {
				if (output[j].invalid_fields & all_output_options[i].field) {
					pr_warning("\'%s\' not valid for %s events. Ignoring.\n",
						   all_output_options[i].str, event_type(j));
				} else
					output[j].fields |= all_output_options[i].field;
			}
		} else {
			if (output[type].invalid_fields & all_output_options[i].field) {
				fprintf(stderr, "\'%s\' not valid for %s events.\n",
					 all_output_options[i].str, event_type(type));

				rc = -EINVAL;
				goto out;
			}
			output[type].fields |= all_output_options[i].field;
		}

		tok = strtok(NULL, ",");
800 801
	}

802 803 804 805 806 807
	if (type >= 0) {
		if (output[type].fields == 0) {
			pr_debug("No fields requested for %s type. "
				 "Events will not be displayed.\n", event_type(type));
		}
	}
808

809
out:
810 811 812 813
	free(str);
	return rc;
}

814 815 816 817 818 819 820 821 822 823 824 825 826 827
/* 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)\
828 829
	while (!readdir_r(scripts_dir, &lang_dirent, &lang_next) &&	\
	       lang_next)						\
830 831 832
		if ((lang_dirent.d_type == DT_DIR ||			\
		     (lang_dirent.d_type == DT_UNKNOWN &&		\
		      is_directory(scripts_path, &lang_dirent))) &&	\
833 834 835
		    (strcmp(lang_dirent.d_name, ".")) &&		\
		    (strcmp(lang_dirent.d_name, "..")))

836
#define for_each_script(lang_path, lang_dir, script_dirent, script_next)\
837 838
	while (!readdir_r(lang_dir, &script_dirent, &script_next) &&	\
	       script_next)						\
839 840 841
		if (script_dirent.d_type != DT_DIR &&			\
		    (script_dirent.d_type != DT_UNKNOWN ||		\
		     !is_directory(lang_path, &script_dirent)))
842 843 844 845 846 847 848 849 850 851 852 853


#define RECORD_SUFFIX			"-record"
#define REPORT_SUFFIX			"-report"

struct script_desc {
	struct list_head	node;
	char			*name;
	char			*half_liner;
	char			*args;
};

854
static LIST_HEAD(script_descs);
855 856 857 858 859

static struct script_desc *script_desc__new(const char *name)
{
	struct script_desc *s = zalloc(sizeof(*s));

860
	if (s != NULL && name)
861 862 863 864 865 866 867 868
		s->name = strdup(name);

	return s;
}

static void script_desc__delete(struct script_desc *s)
{
	free(s->name);
869 870
	free(s->half_liner);
	free(s->args);
871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909
	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;
}

910
static const char *ends_with(const char *str, const char *suffix)
911 912
{
	size_t suffix_len = strlen(suffix);
913
	const char *p = str;
914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976

	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;
}

977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994
static char *get_script_root(struct dirent *script_dirent, const char *suffix)
{
	char *script_root, *str;

	script_root = strdup(script_dirent->d_name);
	if (!script_root)
		return NULL;

	str = (char *)ends_with(script_root, suffix);
	if (!str) {
		free(script_root);
		return NULL;
	}

	*str = '\0';
	return script_root;
}

995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012
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;

	snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());

	scripts_dir = opendir(scripts_path);
	if (!scripts_dir)
		return -1;

1013
	for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
1014 1015 1016 1017 1018 1019
		snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
			 lang_dirent.d_name);
		lang_dir = opendir(lang_path);
		if (!lang_dir)
			continue;

1020
		for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1021 1022
			script_root = get_script_root(&script_dirent, REPORT_SUFFIX);
			if (script_root) {
1023 1024 1025 1026
				desc = script_desc__findnew(script_root);
				snprintf(script_path, MAXPATHLEN, "%s/%s",
					 lang_path, script_dirent.d_name);
				read_script_info(desc, script_path);
1027
				free(script_root);
1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042
			}
		}
	}

	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);
}

1043 1044 1045 1046 1047 1048 1049
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];
1050
	char *__script_root;
1051 1052 1053 1054 1055 1056 1057

	snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());

	scripts_dir = opendir(scripts_path);
	if (!scripts_dir)
		return NULL;

1058
	for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
1059 1060 1061 1062 1063 1064
		snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
			 lang_dirent.d_name);
		lang_dir = opendir(lang_path);
		if (!lang_dir)
			continue;

1065
		for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1066 1067 1068
			__script_root = get_script_root(&script_dirent, suffix);
			if (__script_root && !strcmp(script_root, __script_root)) {
				free(__script_root);
1069 1070
				closedir(lang_dir);
				closedir(scripts_dir);
1071 1072
				snprintf(script_path, MAXPATHLEN, "%s/%s",
					 lang_path, script_dirent.d_name);
1073
				return strdup(script_path);
1074 1075 1076
			}
			free(__script_root);
		}
1077
		closedir(lang_dir);
1078
	}
1079
	closedir(scripts_dir);
1080

1081
	return NULL;
1082 1083
}

1084 1085
static bool is_top_script(const char *script_path)
{
1086
	return ends_with(script_path, "top") == NULL ? false : true;
1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111
}

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;
}

1112 1113 1114 1115 1116 1117
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]",
F
Frederic Weisbecker 已提交
1118 1119 1120 1121 1122 1123
	NULL
};

static const struct option options[] = {
	OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
		    "dump raw trace in ASCII"),
1124
	OPT_INCR('v', "verbose", &verbose,
F
Frederic Weisbecker 已提交
1125
		    "be more verbose (show symbol address, etc)"),
1126
	OPT_BOOLEAN('L', "Latency", &latency_format,
1127
		    "show latency attributes (irqs/preemption disabled, etc)"),
1128 1129
	OPT_CALLBACK_NOOPT('l', "list", NULL, NULL, "list available scripts",
			   list_available_scripts),
T
Tom Zanussi 已提交
1130 1131 1132 1133
	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",
1134
		   "generate perf-script.xx script in specified language"),
1135 1136
	OPT_STRING('i', "input", &input_name, "file",
		    "input file name"),
1137 1138
	OPT_BOOLEAN('d', "debug-mode", &debug_mode,
		   "do various checks like samples ordering and lost events"),
1139 1140 1141 1142 1143 1144 1145 1146
	OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
		   "file", "vmlinux pathname"),
	OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
		   "file", "kallsyms pathname"),
	OPT_BOOLEAN('G', "hide-call-graph", &no_callchain,
		    "When printing symbols do not display call chain"),
	OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
		    "Look for files with symbols relative to this directory"),
1147
	OPT_CALLBACK('f', "fields", NULL, "str",
1148 1149 1150 1151
		     "comma separated output fields prepend with 'type:'. "
		     "Valid types: hw,sw,trace,raw. "
		     "Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,"
		     "addr,symoff",
1152
		     parse_output_fields),
1153 1154
	OPT_BOOLEAN('a', "all-cpus", &system_wide,
		     "system-wide collection from all CPUs"),
1155
	OPT_STRING('C', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
1156 1157
	OPT_STRING('c', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
		   "only display events for these comms"),
1158 1159
	OPT_BOOLEAN('I', "show-info", &show_full_info,
		    "display extended information from perf.data file"),
1160 1161 1162
	OPT_BOOLEAN('\0', "show-kernel-path", &symbol_conf.show_kernel_path,
		    "Show the path of [kernel.kallsyms]"),

1163
	OPT_END()
F
Frederic Weisbecker 已提交
1164 1165
};

1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179
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;
}

1180
int cmd_script(int argc, const char **argv, const char *prefix __used)
F
Frederic Weisbecker 已提交
1181
{
1182 1183
	char *rec_script_path = NULL;
	char *rep_script_path = NULL;
1184
	struct perf_session *session;
1185
	char *script_path = NULL;
1186
	const char **__argv;
1187
	int i, j, err;
1188

1189 1190
	setup_scripting();

1191
	argc = parse_options(argc, argv, options, script_usage,
1192 1193 1194 1195 1196 1197
			     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);
1198 1199
	}

1200 1201 1202
	if (argc > 1 && !strncmp(argv[0], "rep", strlen("rep"))) {
		rep_script_path = get_script_path(argv[1], REPORT_SUFFIX);
		if (!rep_script_path) {
1203
			fprintf(stderr,
1204
				"Please specify a valid report script"
1205
				"(see 'perf script -l' for listing)\n");
1206 1207 1208 1209
			return -1;
		}
	}

1210 1211 1212
	/* make sure PERF_EXEC_PATH is set for scripts */
	perf_set_argv_exec_path(perf_exec_path());

1213
	if (argc && !script_name && !rec_script_path && !rep_script_path) {
1214
		int live_pipe[2];
1215
		int rep_args;
1216 1217
		pid_t pid;

1218 1219 1220 1221 1222
		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"
1223 1224
				" script -l for available scripts.\n", argv[0]);
			usage_with_options(script_usage, options);
1225 1226
		}

1227 1228 1229 1230 1231 1232 1233 1234 1235
		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."
1236
					"\n\n See perf script -l for available "
1237
					"scripts and options.\n", argv[0]);
1238
				usage_with_options(script_usage, options);
1239
			}
1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253
		}

		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) {
1254 1255
			j = 0;

1256 1257 1258
			dup2(live_pipe[1], 1);
			close(live_pipe[0]);

1259 1260 1261
			if (is_top_script(argv[0])) {
				system_wide = true;
			} else if (!system_wide) {
1262 1263
				system_wide = !have_cmd(argc - rep_args,
							&argv[rep_args]);
1264
			}
1265 1266

			__argv = malloc((argc + 6) * sizeof(const char *));
1267 1268 1269
			if (!__argv)
				die("malloc");

1270 1271 1272 1273 1274 1275 1276 1277 1278 1279
			__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;
1280 1281

			execvp("/bin/sh", (char **)__argv);
1282
			free(__argv);
1283 1284 1285 1286 1287 1288
			exit(-1);
		}

		dup2(live_pipe[0], 0);
		close(live_pipe[1]);

1289
		__argv = malloc((argc + 4) * sizeof(const char *));
1290 1291
		if (!__argv)
			die("malloc");
1292 1293 1294 1295 1296 1297 1298 1299
		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;
1300 1301

		execvp("/bin/sh", (char **)__argv);
1302
		free(__argv);
1303 1304 1305
		exit(-1);
	}

1306 1307 1308 1309
	if (rec_script_path)
		script_path = rec_script_path;
	if (rep_script_path)
		script_path = rep_script_path;
1310

1311 1312
	if (script_path) {
		j = 0;
1313

1314 1315 1316
		if (!rec_script_path)
			system_wide = false;
		else if (!system_wide)
1317
			system_wide = !have_cmd(argc - 1, &argv[1]);
1318

1319
		__argv = malloc((argc + 2) * sizeof(const char *));
1320 1321
		if (!__argv)
			die("malloc");
1322 1323 1324 1325
		__argv[j++] = "/bin/sh";
		__argv[j++] = script_path;
		if (system_wide)
			__argv[j++] = "-a";
1326
		for (i = 2; i < argc; i++)
1327 1328
			__argv[j++] = argv[i];
		__argv[j++] = NULL;
1329 1330

		execvp("/bin/sh", (char **)__argv);
1331
		free(__argv);
1332 1333
		exit(-1);
	}
T
Tom Zanussi 已提交
1334

1335 1336
	if (symbol__init() < 0)
		return -1;
1337 1338
	if (!script_name)
		setup_pager();
F
Frederic Weisbecker 已提交
1339

1340
	session = perf_session__new(input_name, O_RDONLY, 0, false, &perf_script);
1341 1342 1343
	if (session == NULL)
		return -ENOMEM;

1344 1345 1346 1347 1348
	if (cpu_list) {
		if (perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap))
			return -1;
	}

1349 1350
	perf_session__fprintf_info(session, stdout, show_full_info);

1351
	if (!no_callchain)
1352 1353 1354 1355
		symbol_conf.use_callchain = true;
	else
		symbol_conf.use_callchain = false;

T
Tom Zanussi 已提交
1356 1357
	if (generate_script_lang) {
		struct stat perf_stat;
1358 1359
		int input;

1360
		if (output_set_by_user()) {
1361 1362 1363 1364
			fprintf(stderr,
				"custom fields not supported for generated scripts");
			return -1;
		}
T
Tom Zanussi 已提交
1365

1366
		input = open(session->filename, O_RDONLY);	/* input_name */
T
Tom Zanussi 已提交
1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388
		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;
		}

1389
		err = scripting_ops->generate_script("perf-script");
T
Tom Zanussi 已提交
1390 1391 1392 1393
		goto out;
	}

	if (script_name) {
1394
		err = scripting_ops->start_script(script_name, argc, argv);
T
Tom Zanussi 已提交
1395 1396
		if (err)
			goto out;
1397
		pr_debug("perf script started with script %s\n\n", script_name);
T
Tom Zanussi 已提交
1398 1399
	}

1400 1401 1402 1403 1404

	err = perf_session__check_output_opt(session);
	if (err < 0)
		goto out;

1405
	err = __cmd_script(session);
T
Tom Zanussi 已提交
1406

1407
	perf_session__delete(session);
T
Tom Zanussi 已提交
1408 1409 1410
	cleanup_scripting();
out:
	return err;
F
Frederic Weisbecker 已提交
1411
}