path: root/tools/perf/util/event.c

#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <linux/compiler.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <perf/cpumap.h>
#include <perf/event.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
#include <linux/perf_event.h>
#include <linux/zalloc.h>
#include "cpumap.h"
#include "dso.h"
#include "event.h"
#include "debug.h"
#include "hist.h"
#include "machine.h"
#include "sort.h"
#include "string2.h"
#include "strlist.h"
#include "thread.h"
#include "thread_map.h"
#include "time-utils.h"
#include <linux/ctype.h>
#include "map.h"
#include "util/namespaces.h"
#include "symbol.h"
#include "symbol/kallsyms.h"
#include "asm/bug.h"
#include "stat.h"
#include "session.h"
#include "bpf-event.h"
#include "print_binary.h"
#include "tool.h"
#include "util.h"

static const char *perf_event__names[] = {
	[0]					= "TOTAL",
	[PERF_RECORD_MMAP]			= "MMAP",
	[PERF_RECORD_MMAP2]			= "MMAP2",
	[PERF_RECORD_LOST]			= "LOST",
	[PERF_RECORD_COMM]			= "COMM",
	[PERF_RECORD_EXIT]			= "EXIT",
	[PERF_RECORD_THROTTLE]			= "THROTTLE",
	[PERF_RECORD_UNTHROTTLE]		= "UNTHROTTLE",
	[PERF_RECORD_FORK]			= "FORK",
	[PERF_RECORD_READ]			= "READ",
	[PERF_RECORD_SAMPLE]			= "SAMPLE",
	[PERF_RECORD_AUX]			= "AUX",
	[PERF_RECORD_ITRACE_START]		= "ITRACE_START",
	[PERF_RECORD_LOST_SAMPLES]		= "LOST_SAMPLES",
	[PERF_RECORD_SWITCH]			= "SWITCH",
	[PERF_RECORD_SWITCH_CPU_WIDE]		= "SWITCH_CPU_WIDE",
	[PERF_RECORD_NAMESPACES]		= "NAMESPACES",
	[PERF_RECORD_KSYMBOL]			= "KSYMBOL",
	[PERF_RECORD_BPF_EVENT]			= "BPF_EVENT",
	[PERF_RECORD_CGROUP]			= "CGROUP",
	[PERF_RECORD_TEXT_POKE]			= "TEXT_POKE",
	[PERF_RECORD_AUX_OUTPUT_HW_ID]		= "AUX_OUTPUT_HW_ID",
	[PERF_RECORD_CALLCHAIN_DEFERRED]	= "CALLCHAIN_DEFERRED",
	[PERF_RECORD_HEADER_ATTR]		= "ATTR",
	[PERF_RECORD_HEADER_EVENT_TYPE]		= "EVENT_TYPE",
	[PERF_RECORD_HEADER_TRACING_DATA]	= "TRACING_DATA",
	[PERF_RECORD_HEADER_BUILD_ID]		= "BUILD_ID",
	[PERF_RECORD_FINISHED_ROUND]		= "FINISHED_ROUND",
	[PERF_RECORD_ID_INDEX]			= "ID_INDEX",
	[PERF_RECORD_AUXTRACE_INFO]		= "AUXTRACE_INFO",
	[PERF_RECORD_AUXTRACE]			= "AUXTRACE",
	[PERF_RECORD_AUXTRACE_ERROR]		= "AUXTRACE_ERROR",
	[PERF_RECORD_THREAD_MAP]		= "THREAD_MAP",
	[PERF_RECORD_CPU_MAP]			= "CPU_MAP",
	[PERF_RECORD_STAT_CONFIG]		= "STAT_CONFIG",
	[PERF_RECORD_STAT]			= "STAT",
	[PERF_RECORD_STAT_ROUND]		= "STAT_ROUND",
	[PERF_RECORD_EVENT_UPDATE]		= "EVENT_UPDATE",
	[PERF_RECORD_TIME_CONV]			= "TIME_CONV",
	[PERF_RECORD_HEADER_FEATURE]		= "FEATURE",
	[PERF_RECORD_COMPRESSED]		= "COMPRESSED",
	[PERF_RECORD_FINISHED_INIT]		= "FINISHED_INIT",
	[PERF_RECORD_COMPRESSED2]		= "COMPRESSED2",
	[PERF_RECORD_BPF_METADATA]		= "BPF_METADATA",
};

const char *perf_event__name(unsigned int id)
{
	if (id >= ARRAY_SIZE(perf_event__names))
		return "INVALID";
	if (!perf_event__names[id])
		return "UNKNOWN";
	return perf_event__names[id];
}

struct process_symbol_args {
	const char *name;
	u64	   start;
};

static int find_func_symbol_cb(void *arg, const char *name, char type,
			       u64 start)
{
	struct process_symbol_args *args = arg;

	/*
	 * Must be a function or at least an alias, as in PARISC64, where "_text" is
	 * an 'A' to the same address as "_stext".
	 */
	if (!(kallsyms__is_function(type) ||
	      type == 'A') || strcmp(name, args->name))
		return 0;

	args->start = start;
	return 1;
}

static int find_any_symbol_cb(void *arg, const char *name,
			      char type __maybe_unused, u64 start)
{
	struct process_symbol_args *args = arg;

	if (strcmp(name, args->name))
		return 0;

	args->start = start;
	return 1;
}

int kallsyms__get_function_start(const char *kallsyms_filename,
				 const char *symbol_name, u64 *addr)
{
	struct process_symbol_args args = { .name = symbol_name, };

	if (kallsyms__parse(kallsyms_filename, &args, find_func_symbol_cb) <= 0)
		return -1;

	*addr = args.start;
	return 0;
}

int kallsyms__get_symbol_start(const char *kallsyms_filename,
			       const char *symbol_name, u64 *addr)
{
	struct process_symbol_args args = { .name = symbol_name, };

	if (kallsyms__parse(kallsyms_filename, &args