builtin-script.c 33.1 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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{
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	struct perf_event_attr *attr = &evsel->attr;
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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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		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_evsel__print_ip(evsel, 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, struct perf_sample *sample,
			  struct perf_evsel *evsel, struct machine *machine,
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			  struct addr_location *al)
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{
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	struct perf_event_attr *attr = &evsel->attr;
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	struct thread *thread = al->thread;
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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))
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		event_format__print(evsel->tp_format, 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_evsel__print_ip(evsel, 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(struct pevent *pevent __unused,
				   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, &al);
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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 = {
	.sample		 = process_sample_event,
	.mmap		 = perf_event__process_mmap,
	.comm		 = perf_event__process_comm,
	.exit		 = perf_event__process_task,
	.fork		 = perf_event__process_task,
	.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,
	.ordered_samples = true,
	.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();
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		exit(0);
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	}

	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;
676
		ext = strrchr(script, '.');
T
Tom Zanussi 已提交
677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692
		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;
}

693 694 695 696 697
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);
698
	int j;
699 700
	int rc = 0;
	char *str = strdup(arg);
701
	int type = -1;
702 703 704 705

	if (!str)
		return -ENOMEM;

706 707 708
	/* 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.
709
	 */
710 711 712 713 714 715 716 717 718 719
	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;
720 721
		else if (!strcmp(str, "raw"))
			type = PERF_TYPE_RAW;
722 723
		else {
			fprintf(stderr, "Invalid event type in field string.\n");
724 725
			rc = -EINVAL;
			goto out;
726 727 728 729 730 731 732 733
		}

		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;
734
		output[type].wildcard_set = false;
735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750

	} 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;
751
			output[j].wildcard_set = true;
752
		}
753 754
	}

755 756
	tok = strtok(tok, ",");
	while (tok) {
757
		for (i = 0; i < imax; ++i) {
758
			if (strcmp(tok, all_output_options[i].str) == 0)
759 760 761
				break;
		}
		if (i == imax) {
762
			fprintf(stderr, "Invalid field requested.\n");
763
			rc = -EINVAL;
764
			goto out;
765 766
		}

767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789
		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, ",");
790 791
	}

792 793 794 795 796 797
	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));
		}
	}
798

799
out:
800 801 802 803
	free(str);
	return rc;
}

804 805 806 807 808 809 810 811 812 813 814 815 816 817
/* 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)\
818 819
	while (!readdir_r(scripts_dir, &lang_dirent, &lang_next) &&	\
	       lang_next)						\
820 821 822
		if ((lang_dirent.d_type == DT_DIR ||			\
		     (lang_dirent.d_type == DT_UNKNOWN &&		\
		      is_directory(scripts_path, &lang_dirent))) &&	\
823 824 825
		    (strcmp(lang_dirent.d_name, ".")) &&		\
		    (strcmp(lang_dirent.d_name, "..")))

826
#define for_each_script(lang_path, lang_dir, script_dirent, script_next)\
827 828
	while (!readdir_r(lang_dir, &script_dirent, &script_next) &&	\
	       script_next)						\
829 830 831
		if (script_dirent.d_type != DT_DIR &&			\
		    (script_dirent.d_type != DT_UNKNOWN ||		\
		     !is_directory(lang_path, &script_dirent)))
832 833 834 835 836 837 838 839 840 841 842 843


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

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

844
static LIST_HEAD(script_descs);
845 846 847 848 849

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

850
	if (s != NULL && name)
851 852 853 854 855 856 857 858
		s->name = strdup(name);

	return s;
}

static void script_desc__delete(struct script_desc *s)
{
	free(s->name);
859 860
	free(s->half_liner);
	free(s->args);
861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899
	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;
}

900
static const char *ends_with(const char *str, const char *suffix)
901 902
{
	size_t suffix_len = strlen(suffix);
903
	const char *p = str;
904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966

	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;
}

967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984
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;
}

985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002
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;

1003
	for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
1004 1005 1006 1007 1008 1009
		snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
			 lang_dirent.d_name);
		lang_dir = opendir(lang_path);
		if (!lang_dir)
			continue;

1010
		for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1011 1012
			script_root = get_script_root(&script_dirent, REPORT_SUFFIX);
			if (script_root) {
1013 1014 1015 1016
				desc = script_desc__findnew(script_root);
				snprintf(script_path, MAXPATHLEN, "%s/%s",
					 lang_path, script_dirent.d_name);
				read_script_info(desc, script_path);
1017
				free(script_root);
1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032
			}
		}
	}

	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);
}

1033 1034 1035 1036 1037 1038 1039
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];
1040
	char *__script_root;
1041 1042 1043 1044 1045 1046 1047

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

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

1048
	for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
1049 1050 1051 1052 1053 1054
		snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
			 lang_dirent.d_name);
		lang_dir = opendir(lang_path);
		if (!lang_dir)
			continue;

1055
		for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1056 1057 1058
			__script_root = get_script_root(&script_dirent, suffix);
			if (__script_root && !strcmp(script_root, __script_root)) {
				free(__script_root);
1059 1060
				closedir(lang_dir);
				closedir(scripts_dir);
1061 1062
				snprintf(script_path, MAXPATHLEN, "%s/%s",
					 lang_path, script_dirent.d_name);
1063
				return strdup(script_path);
1064 1065 1066
			}
			free(__script_root);
		}
1067
		closedir(lang_dir);
1068
	}
1069
	closedir(scripts_dir);
1070

1071
	return NULL;
1072 1073
}

1074 1075
static bool is_top_script(const char *script_path)
{
1076
	return ends_with(script_path, "top") == NULL ? false : true;
1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101
}

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;
}

1102 1103 1104 1105 1106 1107
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
1108 1109 1110 1111 1112 1113
	NULL
};

static const struct option options[] = {
	OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
		    "dump raw trace in ASCII"),
1114
	OPT_INCR('v', "verbose", &verbose,
F
Frederic Weisbecker 已提交
1115
		    "be more verbose (show symbol address, etc)"),
1116
	OPT_BOOLEAN('L', "Latency", &latency_format,
1117
		    "show latency attributes (irqs/preemption disabled, etc)"),
1118 1119
	OPT_CALLBACK_NOOPT('l', "list", NULL, NULL, "list available scripts",
			   list_available_scripts),
T
Tom Zanussi 已提交
1120 1121 1122 1123
	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",
1124
		   "generate perf-script.xx script in specified language"),
1125 1126
	OPT_STRING('i', "input", &input_name, "file",
		    "input file name"),
1127 1128
	OPT_BOOLEAN('d', "debug-mode", &debug_mode,
		   "do various checks like samples ordering and lost events"),
1129 1130 1131 1132 1133 1134 1135 1136
	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"),
1137
	OPT_CALLBACK('f', "fields", NULL, "str",
1138 1139 1140 1141
		     "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",
1142
		     parse_output_fields),
1143 1144
	OPT_BOOLEAN('a', "all-cpus", &system_wide,
		     "system-wide collection from all CPUs"),
1145
	OPT_STRING('C', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
1146 1147
	OPT_STRING('c', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
		   "only display events for these comms"),
1148 1149
	OPT_BOOLEAN('I', "show-info", &show_full_info,
		    "display extended information from perf.data file"),
1150 1151 1152
	OPT_BOOLEAN('\0', "show-kernel-path", &symbol_conf.show_kernel_path,
		    "Show the path of [kernel.kallsyms]"),

1153
	OPT_END()
F
Frederic Weisbecker 已提交
1154 1155
};

1156
static int have_cmd(int argc, const char **argv)
1157 1158 1159
{
	char **__argv = malloc(sizeof(const char *) * argc);

1160 1161 1162 1163 1164
	if (!__argv) {
		pr_err("malloc failed\n");
		return -1;
	}

1165 1166 1167 1168 1169
	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);

1170 1171 1172
	system_wide = (argc == 0);

	return 0;
1173 1174
}

1175
int cmd_script(int argc, const char **argv, const char *prefix __used)
F
Frederic Weisbecker 已提交
1176
{
1177 1178
	char *rec_script_path = NULL;
	char *rep_script_path = NULL;
1179
	struct perf_session *session;
1180
	char *script_path = NULL;
1181
	const char **__argv;
1182
	int i, j, err;
1183

1184 1185
	setup_scripting();

1186
	argc = parse_options(argc, argv, options, script_usage,
1187 1188 1189 1190 1191 1192
			     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);
1193 1194
	}

1195 1196 1197
	if (argc > 1 && !strncmp(argv[0], "rep", strlen("rep"))) {
		rep_script_path = get_script_path(argv[1], REPORT_SUFFIX);
		if (!rep_script_path) {
1198
			fprintf(stderr,
1199
				"Please specify a valid report script"
1200
				"(see 'perf script -l' for listing)\n");
1201 1202 1203 1204
			return -1;
		}
	}

1205 1206 1207
	/* make sure PERF_EXEC_PATH is set for scripts */
	perf_set_argv_exec_path(perf_exec_path());

1208
	if (argc && !script_name && !rec_script_path && !rep_script_path) {
1209
		int live_pipe[2];
1210
		int rep_args;
1211 1212
		pid_t pid;

1213 1214 1215 1216 1217
		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"
1218 1219
				" script -l for available scripts.\n", argv[0]);
			usage_with_options(script_usage, options);
1220 1221
		}

1222 1223 1224 1225 1226 1227 1228 1229 1230
		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."
1231
					"\n\n See perf script -l for available "
1232
					"scripts and options.\n", argv[0]);
1233
				usage_with_options(script_usage, options);
1234
			}
1235 1236 1237 1238
		}

		if (pipe(live_pipe) < 0) {
			perror("failed to create pipe");
1239
			return -1;
1240 1241 1242 1243 1244
		}

		pid = fork();
		if (pid < 0) {
			perror("failed to fork");
1245
			return -1;
1246 1247 1248
		}

		if (!pid) {
1249 1250
			j = 0;

1251 1252 1253
			dup2(live_pipe[1], 1);
			close(live_pipe[0]);

1254 1255 1256
			if (is_top_script(argv[0])) {
				system_wide = true;
			} else if (!system_wide) {
1257 1258 1259 1260
				if (have_cmd(argc - rep_args, &argv[rep_args]) != 0) {
					err = -1;
					goto out;
				}
1261
			}
1262 1263

			__argv = malloc((argc + 6) * sizeof(const char *));
1264 1265 1266 1267 1268
			if (!__argv) {
				pr_err("malloc failed\n");
				err = -ENOMEM;
				goto out;
			}
1269

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 1292 1293 1294 1295
		if (!__argv) {
			pr_err("malloc failed\n");
			err = -ENOMEM;
			goto out;
		}

1296 1297 1298 1299 1300 1301 1302 1303
		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;
1304 1305

		execvp("/bin/sh", (char **)__argv);
1306
		free(__argv);
1307 1308 1309
		exit(-1);
	}

1310 1311 1312 1313
	if (rec_script_path)
		script_path = rec_script_path;
	if (rep_script_path)
		script_path = rep_script_path;
1314

1315 1316
	if (script_path) {
		j = 0;
1317

1318 1319
		if (!rec_script_path)
			system_wide = false;
1320 1321 1322 1323 1324 1325
		else if (!system_wide) {
			if (have_cmd(argc - 1, &argv[1]) != 0) {
				err = -1;
				goto out;
			}
		}
1326

1327
		__argv = malloc((argc + 2) * sizeof(const char *));
1328 1329 1330 1331 1332 1333
		if (!__argv) {
			pr_err("malloc failed\n");
			err = -ENOMEM;
			goto out;
		}

1334 1335 1336 1337
		__argv[j++] = "/bin/sh";
		__argv[j++] = script_path;
		if (system_wide)
			__argv[j++] = "-a";
1338
		for (i = 2; i < argc; i++)
1339 1340
			__argv[j++] = argv[i];
		__argv[j++] = NULL;
1341 1342

		execvp("/bin/sh", (char **)__argv);
1343
		free(__argv);
1344 1345
		exit(-1);
	}
T
Tom Zanussi 已提交
1346

1347 1348
	if (symbol__init() < 0)
		return -1;
1349 1350
	if (!script_name)
		setup_pager();
F
Frederic Weisbecker 已提交
1351

1352
	session = perf_session__new(input_name, O_RDONLY, 0, false,
1353
				    &perf_script);
1354 1355 1356
	if (session == NULL)
		return -ENOMEM;

1357 1358 1359 1360 1361
	if (cpu_list) {
		if (perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap))
			return -1;
	}

1362 1363
	perf_session__fprintf_info(session, stdout, show_full_info);

1364
	if (!no_callchain)
1365 1366 1367 1368
		symbol_conf.use_callchain = true;
	else
		symbol_conf.use_callchain = false;

T
Tom Zanussi 已提交
1369 1370
	if (generate_script_lang) {
		struct stat perf_stat;
1371 1372
		int input;

1373
		if (output_set_by_user()) {
1374 1375 1376 1377
			fprintf(stderr,
				"custom fields not supported for generated scripts");
			return -1;
		}
T
Tom Zanussi 已提交
1378

1379
		input = open(session->filename, O_RDONLY);	/* input_name */
T
Tom Zanussi 已提交
1380 1381
		if (input < 0) {
			perror("failed to open file");
1382
			return -1;
T
Tom Zanussi 已提交
1383 1384 1385 1386 1387
		}

		err = fstat(input, &perf_stat);
		if (err < 0) {
			perror("failed to stat file");
1388
			return -1;
T
Tom Zanussi 已提交
1389 1390 1391 1392
		}

		if (!perf_stat.st_size) {
			fprintf(stderr, "zero-sized file, nothing to do!\n");
1393
			return 0;
T
Tom Zanussi 已提交
1394 1395 1396 1397 1398 1399 1400 1401
		}

		scripting_ops = script_spec__lookup(generate_script_lang);
		if (!scripting_ops) {
			fprintf(stderr, "invalid language specifier");
			return -1;
		}

1402 1403
		err = scripting_ops->generate_script(session->pevent,
						     "perf-script");
T
Tom Zanussi 已提交
1404 1405 1406 1407
		goto out;
	}

	if (script_name) {
1408
		err = scripting_ops->start_script(script_name, argc, argv);
T
Tom Zanussi 已提交
1409 1410
		if (err)
			goto out;
1411
		pr_debug("perf script started with script %s\n\n", script_name);
T
Tom Zanussi 已提交
1412 1413
	}

1414 1415 1416 1417 1418

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

1419
	err = __cmd_script(session);
T
Tom Zanussi 已提交
1420

1421
	perf_session__delete(session);
T
Tom Zanussi 已提交
1422 1423 1424
	cleanup_scripting();
out:
	return err;
F
Frederic Weisbecker 已提交
1425
}