builtin-script.c 34.7 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 "util/sort.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			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 __maybe_unused,
				int argc __maybe_unused,
				const char **argv __maybe_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 __maybe_unused,
				   const char *outfile __maybe_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 int process_sample_event(struct perf_tool *tool __maybe_unused,
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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;

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static void sig_handler(int sig __maybe_unused)
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{
	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");
}

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static int parse_scriptname(const struct option *opt __maybe_unused,
			    const char *str, int unset __maybe_unused)
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{
	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;
674
		ext = strrchr(script, '.');
T
Tom Zanussi 已提交
675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690
		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;
}

691 692
static int parse_output_fields(const struct option *opt __maybe_unused,
			    const char *arg, int unset __maybe_unused)
693 694 695
{
	char *tok;
	int i, imax = sizeof(all_output_options) / sizeof(struct output_option);
696
	int j;
697 698
	int rc = 0;
	char *str = strdup(arg);
699
	int type = -1;
700 701 702 703

	if (!str)
		return -ENOMEM;

704 705 706
	/* 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.
707
	 */
708 709 710 711 712 713 714 715 716 717
	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;
718 719
		else if (!strcmp(str, "raw"))
			type = PERF_TYPE_RAW;
720 721
		else {
			fprintf(stderr, "Invalid event type in field string.\n");
722 723
			rc = -EINVAL;
			goto out;
724 725 726 727 728 729 730 731
		}

		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;
732
		output[type].wildcard_set = false;
733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748

	} 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;
749
			output[j].wildcard_set = true;
750
		}
751 752
	}

753 754
	tok = strtok(tok, ",");
	while (tok) {
755
		for (i = 0; i < imax; ++i) {
756
			if (strcmp(tok, all_output_options[i].str) == 0)
757 758 759
				break;
		}
		if (i == imax) {
760
			fprintf(stderr, "Invalid field requested.\n");
761
			rc = -EINVAL;
762
			goto out;
763 764
		}

765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787
		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, ",");
788 789
	}

790 791 792 793 794 795
	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));
		}
	}
796

797
out:
798 799 800 801
	free(str);
	return rc;
}

802 803 804 805 806 807 808 809 810 811 812 813 814 815
/* 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)\
816 817
	while (!readdir_r(scripts_dir, &lang_dirent, &lang_next) &&	\
	       lang_next)						\
818 819 820
		if ((lang_dirent.d_type == DT_DIR ||			\
		     (lang_dirent.d_type == DT_UNKNOWN &&		\
		      is_directory(scripts_path, &lang_dirent))) &&	\
821 822 823
		    (strcmp(lang_dirent.d_name, ".")) &&		\
		    (strcmp(lang_dirent.d_name, "..")))

824
#define for_each_script(lang_path, lang_dir, script_dirent, script_next)\
825 826
	while (!readdir_r(lang_dir, &script_dirent, &script_next) &&	\
	       script_next)						\
827 828 829
		if (script_dirent.d_type != DT_DIR &&			\
		    (script_dirent.d_type != DT_UNKNOWN ||		\
		     !is_directory(lang_path, &script_dirent)))
830 831 832 833 834 835 836 837 838 839 840 841


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

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

842
static LIST_HEAD(script_descs);
843 844 845 846 847

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

848
	if (s != NULL && name)
849 850 851 852 853 854 855 856
		s->name = strdup(name);

	return s;
}

static void script_desc__delete(struct script_desc *s)
{
	free(s->name);
857 858
	free(s->half_liner);
	free(s->args);
859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897
	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;
}

898
static const char *ends_with(const char *str, const char *suffix)
899 900
{
	size_t suffix_len = strlen(suffix);
901
	const char *p = str;
902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964

	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;
}

965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982
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;
}

983 984 985
static int list_available_scripts(const struct option *opt __maybe_unused,
				  const char *s __maybe_unused,
				  int unset __maybe_unused)
986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001
{
	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;

1002
	for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
1003 1004 1005 1006 1007 1008
		snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
			 lang_dirent.d_name);
		lang_dir = opendir(lang_path);
		if (!lang_dir)
			continue;

1009
		for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1010 1011
			script_root = get_script_root(&script_dirent, REPORT_SUFFIX);
			if (script_root) {
1012 1013 1014 1015
				desc = script_desc__findnew(script_root);
				snprintf(script_path, MAXPATHLEN, "%s/%s",
					 lang_path, script_dirent.d_name);
				read_script_info(desc, script_path);
1016
				free(script_root);
1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031
			}
		}
	}

	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);
}

1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086
/*
 * Return -1 if none is found, otherwise the actual scripts number.
 *
 * Currently the only user of this function is the script browser, which
 * will list all statically runnable scripts, select one, execute it and
 * show the output in a perf browser.
 */
int find_scripts(char **scripts_array, char **scripts_path_array)
{
	struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
	char scripts_path[MAXPATHLEN];
	DIR *scripts_dir, *lang_dir;
	char lang_path[MAXPATHLEN];
	char *temp;
	int i = 0;

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

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

	for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
		snprintf(lang_path, MAXPATHLEN, "%s/%s", scripts_path,
			 lang_dirent.d_name);
#ifdef NO_LIBPERL
		if (strstr(lang_path, "perl"))
			continue;
#endif
#ifdef NO_LIBPYTHON
		if (strstr(lang_path, "python"))
			continue;
#endif

		lang_dir = opendir(lang_path);
		if (!lang_dir)
			continue;

		for_each_script(lang_path, lang_dir, script_dirent, script_next) {
			/* Skip those real time scripts: xxxtop.p[yl] */
			if (strstr(script_dirent.d_name, "top."))
				continue;
			sprintf(scripts_path_array[i], "%s/%s", lang_path,
				script_dirent.d_name);
			temp = strchr(script_dirent.d_name, '.');
			snprintf(scripts_array[i],
				(temp - script_dirent.d_name) + 1,
				"%s", script_dirent.d_name);
			i++;
		}
	}

	return i;
}

1087 1088 1089 1090 1091 1092 1093
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];
1094
	char *__script_root;
1095 1096 1097 1098 1099 1100 1101

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

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

1102
	for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
1103 1104 1105 1106 1107 1108
		snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
			 lang_dirent.d_name);
		lang_dir = opendir(lang_path);
		if (!lang_dir)
			continue;

1109
		for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1110 1111 1112
			__script_root = get_script_root(&script_dirent, suffix);
			if (__script_root && !strcmp(script_root, __script_root)) {
				free(__script_root);
1113 1114
				closedir(lang_dir);
				closedir(scripts_dir);
1115 1116
				snprintf(script_path, MAXPATHLEN, "%s/%s",
					 lang_path, script_dirent.d_name);
1117
				return strdup(script_path);
1118 1119 1120
			}
			free(__script_root);
		}
1121
		closedir(lang_dir);
1122
	}
1123
	closedir(scripts_dir);
1124

1125
	return NULL;
1126 1127
}

1128 1129
static bool is_top_script(const char *script_path)
{
1130
	return ends_with(script_path, "top") == NULL ? false : true;
1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155
}

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;
}

1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168
static int have_cmd(int argc, const char **argv)
{
	char **__argv = malloc(sizeof(const char *) * argc);

	if (!__argv) {
		pr_err("malloc failed\n");
		return -1;
	}

	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);
F
Frederic Weisbecker 已提交
1169

1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185
	system_wide = (argc == 0);

	return 0;
}

int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
{
	bool show_full_info = false;
	const char *input_name = NULL;
	char *rec_script_path = NULL;
	char *rep_script_path = NULL;
	struct perf_session *session;
	char *script_path = NULL;
	const char **__argv;
	int i, j, err;
	const struct option options[] = {
F
Frederic Weisbecker 已提交
1186 1187
	OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
		    "dump raw trace in ASCII"),
1188
	OPT_INCR('v', "verbose", &verbose,
1189
		 "be more verbose (show symbol address, etc)"),
1190
	OPT_BOOLEAN('L', "Latency", &latency_format,
1191
		    "show latency attributes (irqs/preemption disabled, etc)"),
1192 1193
	OPT_CALLBACK_NOOPT('l', "list", NULL, NULL, "list available scripts",
			   list_available_scripts),
T
Tom Zanussi 已提交
1194 1195 1196 1197
	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",
1198
		   "generate perf-script.xx script in specified language"),
1199
	OPT_STRING('i', "input", &input_name, "file", "input file name"),
1200 1201
	OPT_BOOLEAN('d', "debug-mode", &debug_mode,
		   "do various checks like samples ordering and lost events"),
1202 1203 1204 1205 1206 1207 1208 1209
	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"),
1210
	OPT_CALLBACK('f', "fields", NULL, "str",
1211 1212 1213
		     "comma separated output fields prepend with 'type:'. "
		     "Valid types: hw,sw,trace,raw. "
		     "Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,"
1214
		     "addr,symoff", parse_output_fields),
1215
	OPT_BOOLEAN('a', "all-cpus", &system_wide,
1216
		    "system-wide collection from all CPUs"),
1217 1218
	OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
		   "only consider these symbols"),
1219
	OPT_STRING('C', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
1220 1221
	OPT_STRING('c', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
		   "only display events for these comms"),
1222 1223
	OPT_BOOLEAN('I', "show-info", &show_full_info,
		    "display extended information from perf.data file"),
1224 1225
	OPT_BOOLEAN('\0', "show-kernel-path", &symbol_conf.show_kernel_path,
		    "Show the path of [kernel.kallsyms]"),
1226
	OPT_END()
1227 1228 1229 1230 1231 1232 1233 1234 1235
	};
	const char * const script_usage[] = {
		"perf script [<options>]",
		"perf script [<options>] record <script> [<record-options>] <command>",
		"perf script [<options>] report <script> [script-args]",
		"perf script [<options>] <script> [<record-options>] <command>",
		"perf script [<options>] <top-script> [script-args]",
		NULL
	};
1236

1237 1238
	setup_scripting();

1239
	argc = parse_options(argc, argv, options, script_usage,
1240 1241 1242 1243 1244 1245
			     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);
1246 1247
	}

1248 1249 1250
	if (argc > 1 && !strncmp(argv[0], "rep", strlen("rep"))) {
		rep_script_path = get_script_path(argv[1], REPORT_SUFFIX);
		if (!rep_script_path) {
1251
			fprintf(stderr,
1252
				"Please specify a valid report script"
1253
				"(see 'perf script -l' for listing)\n");
1254 1255 1256 1257
			return -1;
		}
	}

1258 1259 1260
	/* make sure PERF_EXEC_PATH is set for scripts */
	perf_set_argv_exec_path(perf_exec_path());

1261
	if (argc && !script_name && !rec_script_path && !rep_script_path) {
1262
		int live_pipe[2];
1263
		int rep_args;
1264 1265
		pid_t pid;

1266 1267 1268 1269 1270
		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"
1271 1272
				" script -l for available scripts.\n", argv[0]);
			usage_with_options(script_usage, options);
1273 1274
		}

1275 1276 1277 1278 1279 1280 1281 1282 1283
		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."
1284
					"\n\n See perf script -l for available "
1285
					"scripts and options.\n", argv[0]);
1286
				usage_with_options(script_usage, options);
1287
			}
1288 1289 1290 1291
		}

		if (pipe(live_pipe) < 0) {
			perror("failed to create pipe");
1292
			return -1;
1293 1294 1295 1296 1297
		}

		pid = fork();
		if (pid < 0) {
			perror("failed to fork");
1298
			return -1;
1299 1300 1301
		}

		if (!pid) {
1302 1303
			j = 0;

1304 1305 1306
			dup2(live_pipe[1], 1);
			close(live_pipe[0]);

1307 1308 1309
			if (is_top_script(argv[0])) {
				system_wide = true;
			} else if (!system_wide) {
1310 1311 1312 1313
				if (have_cmd(argc - rep_args, &argv[rep_args]) != 0) {
					err = -1;
					goto out;
				}
1314
			}
1315 1316

			__argv = malloc((argc + 6) * sizeof(const char *));
1317 1318 1319 1320 1321
			if (!__argv) {
				pr_err("malloc failed\n");
				err = -ENOMEM;
				goto out;
			}
1322

1323 1324 1325 1326 1327 1328 1329 1330 1331 1332
			__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;
1333 1334

			execvp("/bin/sh", (char **)__argv);
1335
			free(__argv);
1336 1337 1338 1339 1340 1341
			exit(-1);
		}

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

1342
		__argv = malloc((argc + 4) * sizeof(const char *));
1343 1344 1345 1346 1347 1348
		if (!__argv) {
			pr_err("malloc failed\n");
			err = -ENOMEM;
			goto out;
		}

1349 1350 1351 1352 1353 1354 1355 1356
		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;
1357 1358

		execvp("/bin/sh", (char **)__argv);
1359
		free(__argv);
1360 1361 1362
		exit(-1);
	}

1363 1364 1365 1366
	if (rec_script_path)
		script_path = rec_script_path;
	if (rep_script_path)
		script_path = rep_script_path;
1367

1368 1369
	if (script_path) {
		j = 0;
1370

1371 1372
		if (!rec_script_path)
			system_wide = false;
1373 1374 1375 1376 1377 1378
		else if (!system_wide) {
			if (have_cmd(argc - 1, &argv[1]) != 0) {
				err = -1;
				goto out;
			}
		}
1379

1380
		__argv = malloc((argc + 2) * sizeof(const char *));
1381 1382 1383 1384 1385 1386
		if (!__argv) {
			pr_err("malloc failed\n");
			err = -ENOMEM;
			goto out;
		}

1387 1388 1389 1390
		__argv[j++] = "/bin/sh";
		__argv[j++] = script_path;
		if (system_wide)
			__argv[j++] = "-a";
1391
		for (i = 2; i < argc; i++)
1392 1393
			__argv[j++] = argv[i];
		__argv[j++] = NULL;
1394 1395

		execvp("/bin/sh", (char **)__argv);
1396
		free(__argv);
1397 1398
		exit(-1);
	}
T
Tom Zanussi 已提交
1399

1400 1401
	if (symbol__init() < 0)
		return -1;
1402 1403
	if (!script_name)
		setup_pager();
F
Frederic Weisbecker 已提交
1404

1405
	session = perf_session__new(input_name, O_RDONLY, 0, false,
1406
				    &perf_script);
1407 1408 1409
	if (session == NULL)
		return -ENOMEM;

1410 1411 1412 1413 1414
	if (cpu_list) {
		if (perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap))
			return -1;
	}

1415 1416
	perf_session__fprintf_info(session, stdout, show_full_info);

1417
	if (!no_callchain)
1418 1419 1420 1421
		symbol_conf.use_callchain = true;
	else
		symbol_conf.use_callchain = false;

T
Tom Zanussi 已提交
1422 1423
	if (generate_script_lang) {
		struct stat perf_stat;
1424 1425
		int input;

1426
		if (output_set_by_user()) {
1427 1428 1429 1430
			fprintf(stderr,
				"custom fields not supported for generated scripts");
			return -1;
		}
T
Tom Zanussi 已提交
1431

1432
		input = open(session->filename, O_RDONLY);	/* input_name */
T
Tom Zanussi 已提交
1433 1434
		if (input < 0) {
			perror("failed to open file");
1435
			return -1;
T
Tom Zanussi 已提交
1436 1437 1438 1439 1440
		}

		err = fstat(input, &perf_stat);
		if (err < 0) {
			perror("failed to stat file");
1441
			return -1;
T
Tom Zanussi 已提交
1442 1443 1444 1445
		}

		if (!perf_stat.st_size) {
			fprintf(stderr, "zero-sized file, nothing to do!\n");
1446
			return 0;
T
Tom Zanussi 已提交
1447 1448 1449 1450 1451 1452 1453 1454
		}

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

1455 1456
		err = scripting_ops->generate_script(session->pevent,
						     "perf-script");
T
Tom Zanussi 已提交
1457 1458 1459 1460
		goto out;
	}

	if (script_name) {
1461
		err = scripting_ops->start_script(script_name, argc, argv);
T
Tom Zanussi 已提交
1462 1463
		if (err)
			goto out;
1464
		pr_debug("perf script started with script %s\n\n", script_name);
T
Tom Zanussi 已提交
1465 1466
	}

1467 1468 1469 1470 1471

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

1472
	err = __cmd_script(session);
T
Tom Zanussi 已提交
1473

1474
	perf_session__delete(session);
T
Tom Zanussi 已提交
1475 1476 1477
	cleanup_scripting();
out:
	return err;
F
Frederic Weisbecker 已提交
1478
}