session.c 60.2 KB
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#include <linux/kernel.h>
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#include <traceevent/event-parse.h>
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#include <byteswap.h>
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#include <unistd.h>
#include <sys/types.h>
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#include <sys/mman.h>
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#include "evlist.h"
#include "evsel.h"
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#include "session.h"
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#include "tool.h"
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#include "sort.h"
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#include "util.h"
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#include "cpumap.h"
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#include "perf_regs.h"
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#include "asm/bug.h"
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#include "auxtrace.h"
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#include "thread-stack.h"
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#include "stat.h"
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static int perf_session__deliver_event(struct perf_session *session,
				       union perf_event *event,
				       struct perf_sample *sample,
				       struct perf_tool *tool,
				       u64 file_offset);
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static int perf_session__open(struct perf_session *session)
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{
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	struct perf_data_file *file = session->file;
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	if (perf_session__read_header(session) < 0) {
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		pr_err("incompatible file format (rerun with -v to learn more)\n");
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		return -1;
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	}

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	if (perf_data_file__is_pipe(file))
		return 0;

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	if (perf_header__has_feat(&session->header, HEADER_STAT))
		return 0;

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	if (!perf_evlist__valid_sample_type(session->evlist)) {
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		pr_err("non matching sample_type\n");
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		return -1;
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	}

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	if (!perf_evlist__valid_sample_id_all(session->evlist)) {
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		pr_err("non matching sample_id_all\n");
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		return -1;
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	}

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	if (!perf_evlist__valid_read_format(session->evlist)) {
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		pr_err("non matching read_format\n");
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		return -1;
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	}

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	return 0;
}

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void perf_session__set_id_hdr_size(struct perf_session *session)
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{
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	u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);

	machines__set_id_hdr_size(&session->machines, id_hdr_size);
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}

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int perf_session__create_kernel_maps(struct perf_session *session)
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{
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	int ret = machine__create_kernel_maps(&session->machines.host);
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	if (ret >= 0)
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		ret = machines__create_guest_kernel_maps(&session->machines);
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	return ret;
}

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static void perf_session__destroy_kernel_maps(struct perf_session *session)
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{
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	machines__destroy_kernel_maps(&session->machines);
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}

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static bool perf_session__has_comm_exec(struct perf_session *session)
{
	struct perf_evsel *evsel;

	evlist__for_each(session->evlist, evsel) {
		if (evsel->attr.comm_exec)
			return true;
	}

	return false;
}

static void perf_session__set_comm_exec(struct perf_session *session)
{
	bool comm_exec = perf_session__has_comm_exec(session);

	machines__set_comm_exec(&session->machines, comm_exec);
}

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static int ordered_events__deliver_event(struct ordered_events *oe,
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					 struct ordered_event *event)
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{
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	struct perf_sample sample;
	struct perf_session *session = container_of(oe, struct perf_session,
						    ordered_events);
	int ret = perf_evlist__parse_sample(session->evlist, event->event, &sample);

	if (ret) {
		pr_err("Can't parse sample, err = %d\n", ret);
		return ret;
	}

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	return perf_session__deliver_event(session, event->event, &sample,
					   session->tool, event->file_offset);
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}

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struct perf_session *perf_session__new(struct perf_data_file *file,
				       bool repipe, struct perf_tool *tool)
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{
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	struct perf_session *session = zalloc(sizeof(*session));
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	if (!session)
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		goto out;

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	session->repipe = repipe;
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	session->tool   = tool;
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	INIT_LIST_HEAD(&session->auxtrace_index);
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	machines__init(&session->machines);
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	ordered_events__init(&session->ordered_events, ordered_events__deliver_event);
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	if (file) {
		if (perf_data_file__open(file))
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			goto out_delete;
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		session->file = file;
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		if (perf_data_file__is_read(file)) {
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			if (perf_session__open(session) < 0)
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				goto out_close;

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			perf_session__set_id_hdr_size(session);
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			perf_session__set_comm_exec(session);
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		}
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	} else  {
		session->machines.host.env = &perf_env;
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	}

	if (!file || perf_data_file__is_write(file)) {
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		/*
		 * In O_RDONLY mode this will be performed when reading the
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		 * kernel MMAP event, in perf_event__process_mmap().
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		 */
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		if (perf_session__create_kernel_maps(session) < 0)
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			pr_warning("Cannot read kernel map\n");
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	}
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	if (tool && tool->ordering_requires_timestamps &&
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	    tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
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		dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
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		tool->ordered_events = false;
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	}
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	return session;
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 out_close:
	perf_data_file__close(file);
 out_delete:
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	perf_session__delete(session);
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 out:
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	return NULL;
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}

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static void perf_session__delete_threads(struct perf_session *session)
{
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	machine__delete_threads(&session->machines.host);
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}

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void perf_session__delete(struct perf_session *session)
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{
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	auxtrace__free(session);
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	auxtrace_index__free(&session->auxtrace_index);
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	perf_session__destroy_kernel_maps(session);
	perf_session__delete_threads(session);
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	perf_env__exit(&session->header.env);
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	machines__exit(&session->machines);
	if (session->file)
		perf_data_file__close(session->file);
	free(session);
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}
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static int process_event_synth_tracing_data_stub(struct perf_tool *tool
						 __maybe_unused,
						 union perf_event *event
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						 __maybe_unused,
						 struct perf_session *session
						__maybe_unused)
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{
	dump_printf(": unhandled!\n");
	return 0;
}

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static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
					 union perf_event *event __maybe_unused,
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					 struct perf_evlist **pevlist
					 __maybe_unused)
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{
	dump_printf(": unhandled!\n");
	return 0;
}

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static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
						 union perf_event *event __maybe_unused,
						 struct perf_evlist **pevlist
						 __maybe_unused)
{
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	if (dump_trace)
		perf_event__fprintf_event_update(event, stdout);

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	dump_printf(": unhandled!\n");
	return 0;
}

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static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
				     union perf_event *event __maybe_unused,
				     struct perf_sample *sample __maybe_unused,
				     struct perf_evsel *evsel __maybe_unused,
				     struct machine *machine __maybe_unused)
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{
	dump_printf(": unhandled!\n");
	return 0;
}

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static int process_event_stub(struct perf_tool *tool __maybe_unused,
			      union perf_event *event __maybe_unused,
			      struct perf_sample *sample __maybe_unused,
			      struct machine *machine __maybe_unused)
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{
	dump_printf(": unhandled!\n");
	return 0;
}

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static int process_build_id_stub(struct perf_tool *tool __maybe_unused,
				 union perf_event *event __maybe_unused,
				 struct perf_session *session __maybe_unused)
{
	dump_printf(": unhandled!\n");
	return 0;
}

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static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
				       union perf_event *event __maybe_unused,
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				       struct ordered_events *oe __maybe_unused)
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{
	dump_printf(": unhandled!\n");
	return 0;
}

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static int process_finished_round(struct perf_tool *tool,
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				  union perf_event *event,
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				  struct ordered_events *oe);
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static int process_id_index_stub(struct perf_tool *tool __maybe_unused,
				 union perf_event *event __maybe_unused,
				 struct perf_session *perf_session
				 __maybe_unused)
{
	dump_printf(": unhandled!\n");
	return 0;
}

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static int process_event_auxtrace_info_stub(struct perf_tool *tool __maybe_unused,
				union perf_event *event __maybe_unused,
				struct perf_session *session __maybe_unused)
{
	dump_printf(": unhandled!\n");
	return 0;
}

static int skipn(int fd, off_t n)
{
	char buf[4096];
	ssize_t ret;

	while (n > 0) {
		ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
		if (ret <= 0)
			return ret;
		n -= ret;
	}

	return 0;
}

static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused,
				       union perf_event *event,
				       struct perf_session *session
				       __maybe_unused)
{
	dump_printf(": unhandled!\n");
	if (perf_data_file__is_pipe(session->file))
		skipn(perf_data_file__fd(session->file), event->auxtrace.size);
	return event->auxtrace.size;
}

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static
int process_event_auxtrace_error_stub(struct perf_tool *tool __maybe_unused,
				      union perf_event *event __maybe_unused,
				      struct perf_session *session __maybe_unused)
{
	dump_printf(": unhandled!\n");
	return 0;
}

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static
int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused,
				  union perf_event *event __maybe_unused,
				  struct perf_session *session __maybe_unused)
{
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	if (dump_trace)
		perf_event__fprintf_thread_map(event, stdout);

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	dump_printf(": unhandled!\n");
	return 0;
}

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static
int process_event_cpu_map_stub(struct perf_tool *tool __maybe_unused,
			       union perf_event *event __maybe_unused,
			       struct perf_session *session __maybe_unused)
{
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	if (dump_trace)
		perf_event__fprintf_cpu_map(event, stdout);

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	dump_printf(": unhandled!\n");
	return 0;
}

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static
int process_event_stat_config_stub(struct perf_tool *tool __maybe_unused,
				   union perf_event *event __maybe_unused,
				   struct perf_session *session __maybe_unused)
{
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	if (dump_trace)
		perf_event__fprintf_stat_config(event, stdout);

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	dump_printf(": unhandled!\n");
	return 0;
}

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static int process_stat_stub(struct perf_tool *tool __maybe_unused,
			     union perf_event *event __maybe_unused,
			     struct perf_session *perf_session
			     __maybe_unused)
{
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	if (dump_trace)
		perf_event__fprintf_stat(event, stdout);

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	dump_printf(": unhandled!\n");
	return 0;
}

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static int process_stat_round_stub(struct perf_tool *tool __maybe_unused,
				   union perf_event *event __maybe_unused,
				   struct perf_session *perf_session
				   __maybe_unused)
{
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	if (dump_trace)
		perf_event__fprintf_stat_round(event, stdout);

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	dump_printf(": unhandled!\n");
	return 0;
}

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void perf_tool__fill_defaults(struct perf_tool *tool)
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{
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	if (tool->sample == NULL)
		tool->sample = process_event_sample_stub;
	if (tool->mmap == NULL)
		tool->mmap = process_event_stub;
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	if (tool->mmap2 == NULL)
		tool->mmap2 = process_event_stub;
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	if (tool->comm == NULL)
		tool->comm = process_event_stub;
	if (tool->fork == NULL)
		tool->fork = process_event_stub;
	if (tool->exit == NULL)
		tool->exit = process_event_stub;
	if (tool->lost == NULL)
		tool->lost = perf_event__process_lost;
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	if (tool->lost_samples == NULL)
		tool->lost_samples = perf_event__process_lost_samples;
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	if (tool->aux == NULL)
		tool->aux = perf_event__process_aux;
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	if (tool->itrace_start == NULL)
		tool->itrace_start = perf_event__process_itrace_start;
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	if (tool->context_switch == NULL)
		tool->context_switch = perf_event__process_switch;
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	if (tool->read == NULL)
		tool->read = process_event_sample_stub;
	if (tool->throttle == NULL)
		tool->throttle = process_event_stub;
	if (tool->unthrottle == NULL)
		tool->unthrottle = process_event_stub;
	if (tool->attr == NULL)
		tool->attr = process_event_synth_attr_stub;
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	if (tool->event_update == NULL)
		tool->event_update = process_event_synth_event_update_stub;
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	if (tool->tracing_data == NULL)
		tool->tracing_data = process_event_synth_tracing_data_stub;
	if (tool->build_id == NULL)
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		tool->build_id = process_build_id_stub;
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	if (tool->finished_round == NULL) {
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		if (tool->ordered_events)
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			tool->finished_round = process_finished_round;
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		else
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			tool->finished_round = process_finished_round_stub;
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	}
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	if (tool->id_index == NULL)
		tool->id_index = process_id_index_stub;
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	if (tool->auxtrace_info == NULL)
		tool->auxtrace_info = process_event_auxtrace_info_stub;
	if (tool->auxtrace == NULL)
		tool->auxtrace = process_event_auxtrace_stub;
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	if (tool->auxtrace_error == NULL)
		tool->auxtrace_error = process_event_auxtrace_error_stub;
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	if (tool->thread_map == NULL)
		tool->thread_map = process_event_thread_map_stub;
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	if (tool->cpu_map == NULL)
		tool->cpu_map = process_event_cpu_map_stub;
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	if (tool->stat_config == NULL)
		tool->stat_config = process_event_stat_config_stub;
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	if (tool->stat == NULL)
		tool->stat = process_stat_stub;
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	if (tool->stat_round == NULL)
		tool->stat_round = process_stat_round_stub;
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}
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static void swap_sample_id_all(union perf_event *event, void *data)
{
	void *end = (void *) event + event->header.size;
	int size = end - data;

	BUG_ON(size % sizeof(u64));
	mem_bswap_64(data, size);
}

static void perf_event__all64_swap(union perf_event *event,
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				   bool sample_id_all __maybe_unused)
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{
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	struct perf_event_header *hdr = &event->header;
	mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
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}

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static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
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{
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	event->comm.pid = bswap_32(event->comm.pid);
	event->comm.tid = bswap_32(event->comm.tid);
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	if (sample_id_all) {
		void *data = &event->comm.comm;

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		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
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		swap_sample_id_all(event, data);
	}
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}

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static void perf_event__mmap_swap(union perf_event *event,
				  bool sample_id_all)
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{
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	event->mmap.pid	  = bswap_32(event->mmap.pid);
	event->mmap.tid	  = bswap_32(event->mmap.tid);
	event->mmap.start = bswap_64(event->mmap.start);
	event->mmap.len	  = bswap_64(event->mmap.len);
	event->mmap.pgoff = bswap_64(event->mmap.pgoff);
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	if (sample_id_all) {
		void *data = &event->mmap.filename;

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		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
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		swap_sample_id_all(event, data);
	}
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}

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static void perf_event__mmap2_swap(union perf_event *event,
				  bool sample_id_all)
{
	event->mmap2.pid   = bswap_32(event->mmap2.pid);
	event->mmap2.tid   = bswap_32(event->mmap2.tid);
	event->mmap2.start = bswap_64(event->mmap2.start);
	event->mmap2.len   = bswap_64(event->mmap2.len);
	event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
	event->mmap2.maj   = bswap_32(event->mmap2.maj);
	event->mmap2.min   = bswap_32(event->mmap2.min);
	event->mmap2.ino   = bswap_64(event->mmap2.ino);

	if (sample_id_all) {
		void *data = &event->mmap2.filename;

		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
		swap_sample_id_all(event, data);
	}
}
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static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
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{
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	event->fork.pid	 = bswap_32(event->fork.pid);
	event->fork.tid	 = bswap_32(event->fork.tid);
	event->fork.ppid = bswap_32(event->fork.ppid);
	event->fork.ptid = bswap_32(event->fork.ptid);
	event->fork.time = bswap_64(event->fork.time);
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	if (sample_id_all)
		swap_sample_id_all(event, &event->fork + 1);
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}

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static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
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{
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	event->read.pid		 = bswap_32(event->read.pid);
	event->read.tid		 = bswap_32(event->read.tid);
	event->read.value	 = bswap_64(event->read.value);
	event->read.time_enabled = bswap_64(event->read.time_enabled);
	event->read.time_running = bswap_64(event->read.time_running);
	event->read.id		 = bswap_64(event->read.id);
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	if (sample_id_all)
		swap_sample_id_all(event, &event->read + 1);
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}

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static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
{
	event->aux.aux_offset = bswap_64(event->aux.aux_offset);
	event->aux.aux_size   = bswap_64(event->aux.aux_size);
	event->aux.flags      = bswap_64(event->aux.flags);

	if (sample_id_all)
		swap_sample_id_all(event, &event->aux + 1);
}

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static void perf_event__itrace_start_swap(union perf_event *event,
					  bool sample_id_all)
{
	event->itrace_start.pid	 = bswap_32(event->itrace_start.pid);
	event->itrace_start.tid	 = bswap_32(event->itrace_start.tid);

	if (sample_id_all)
		swap_sample_id_all(event, &event->itrace_start + 1);
}

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static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
{
	if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
		event->context_switch.next_prev_pid =
				bswap_32(event->context_switch.next_prev_pid);
		event->context_switch.next_prev_tid =
				bswap_32(event->context_switch.next_prev_tid);
	}

	if (sample_id_all)
		swap_sample_id_all(event, &event->context_switch + 1);
}

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static void perf_event__throttle_swap(union perf_event *event,
				      bool sample_id_all)
{
	event->throttle.time	  = bswap_64(event->throttle.time);
	event->throttle.id	  = bswap_64(event->throttle.id);
	event->throttle.stream_id = bswap_64(event->throttle.stream_id);

	if (sample_id_all)
		swap_sample_id_all(event, &event->throttle + 1);
}

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static u8 revbyte(u8 b)
{
	int rev = (b >> 4) | ((b & 0xf) << 4);
	rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
	rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
	return (u8) rev;
}

/*
 * XXX this is hack in attempt to carry flags bitfield
 * throught endian village. ABI says:
 *
 * Bit-fields are allocated from right to left (least to most significant)
 * on little-endian implementations and from left to right (most to least
 * significant) on big-endian implementations.
 *
 * The above seems to be byte specific, so we need to reverse each
 * byte of the bitfield. 'Internet' also says this might be implementation
 * specific and we probably need proper fix and carry perf_event_attr
 * bitfield flags in separate data file FEAT_ section. Thought this seems
 * to work for now.
 */
static void swap_bitfield(u8 *p, unsigned len)
{
	unsigned i;

	for (i = 0; i < len; i++) {
		*p = revbyte(*p);
		p++;
	}
}

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/* exported for swapping attributes in file header */
void perf_event__attr_swap(struct perf_event_attr *attr)
{
	attr->type		= bswap_32(attr->type);
	attr->size		= bswap_32(attr->size);
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#define bswap_safe(f, n) 					\
	(attr->size > (offsetof(struct perf_event_attr, f) + 	\
		       sizeof(attr->f) * (n)))
#define bswap_field(f, sz) 			\
do { 						\
	if (bswap_safe(f, 0))			\
		attr->f = bswap_##sz(attr->f);	\
} while(0)
#define bswap_field_32(f) bswap_field(f, 32)
#define bswap_field_64(f) bswap_field(f, 64)

	bswap_field_64(config);
	bswap_field_64(sample_period);
	bswap_field_64(sample_type);
	bswap_field_64(read_format);
	bswap_field_32(wakeup_events);
	bswap_field_32(bp_type);
	bswap_field_64(bp_addr);
	bswap_field_64(bp_len);
	bswap_field_64(branch_sample_type);
	bswap_field_64(sample_regs_user);
	bswap_field_32(sample_stack_user);
	bswap_field_32(aux_watermark);

	/*
	 * After read_format are bitfields. Check read_format because
	 * we are unable to use offsetof on bitfield.
	 */
	if (bswap_safe(read_format, 1))
		swap_bitfield((u8 *) (&attr->read_format + 1),
			      sizeof(u64));
#undef bswap_field_64
#undef bswap_field_32
#undef bswap_field
#undef bswap_safe
647 648
}

649
static void perf_event__hdr_attr_swap(union perf_event *event,
650
				      bool sample_id_all __maybe_unused)
651 652 653
{
	size_t size;

654
	perf_event__attr_swap(&event->attr.attr);
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656 657 658
	size = event->header.size;
	size -= (void *)&event->attr.id - (void *)event;
	mem_bswap_64(event->attr.id, size);
659 660
}

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static void perf_event__event_update_swap(union perf_event *event,
					  bool sample_id_all __maybe_unused)
{
	event->event_update.type = bswap_64(event->event_update.type);
	event->event_update.id   = bswap_64(event->event_update.id);
}

668
static void perf_event__event_type_swap(union perf_event *event,
669
					bool sample_id_all __maybe_unused)
670
{
671 672
	event->event_type.event_type.event_id =
		bswap_64(event->event_type.event_type.event_id);
673 674
}

675
static void perf_event__tracing_data_swap(union perf_event *event,
676
					  bool sample_id_all __maybe_unused)
677
{
678
	event->tracing_data.size = bswap_32(event->tracing_data.size);
679 680
}

681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703
static void perf_event__auxtrace_info_swap(union perf_event *event,
					   bool sample_id_all __maybe_unused)
{
	size_t size;

	event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);

	size = event->header.size;
	size -= (void *)&event->auxtrace_info.priv - (void *)event;
	mem_bswap_64(event->auxtrace_info.priv, size);
}

static void perf_event__auxtrace_swap(union perf_event *event,
				      bool sample_id_all __maybe_unused)
{
	event->auxtrace.size      = bswap_64(event->auxtrace.size);
	event->auxtrace.offset    = bswap_64(event->auxtrace.offset);
	event->auxtrace.reference = bswap_64(event->auxtrace.reference);
	event->auxtrace.idx       = bswap_32(event->auxtrace.idx);
	event->auxtrace.tid       = bswap_32(event->auxtrace.tid);
	event->auxtrace.cpu       = bswap_32(event->auxtrace.cpu);
}

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static void perf_event__auxtrace_error_swap(union perf_event *event,
					    bool sample_id_all __maybe_unused)
{
	event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
	event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
	event->auxtrace_error.cpu  = bswap_32(event->auxtrace_error.cpu);
	event->auxtrace_error.pid  = bswap_32(event->auxtrace_error.pid);
	event->auxtrace_error.tid  = bswap_32(event->auxtrace_error.tid);
	event->auxtrace_error.ip   = bswap_64(event->auxtrace_error.ip);
}

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static void perf_event__thread_map_swap(union perf_event *event,
					bool sample_id_all __maybe_unused)
{
	unsigned i;

	event->thread_map.nr = bswap_64(event->thread_map.nr);

	for (i = 0; i < event->thread_map.nr; i++)
		event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
}

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static void perf_event__cpu_map_swap(union perf_event *event,
				     bool sample_id_all __maybe_unused)
{
	struct cpu_map_data *data = &event->cpu_map.data;
	struct cpu_map_entries *cpus;
	struct cpu_map_mask *mask;
	unsigned i;

	data->type = bswap_64(data->type);

	switch (data->type) {
	case PERF_CPU_MAP__CPUS:
		cpus = (struct cpu_map_entries *)data->data;

		cpus->nr = bswap_16(cpus->nr);

		for (i = 0; i < cpus->nr; i++)
			cpus->cpu[i] = bswap_16(cpus->cpu[i]);
		break;
	case PERF_CPU_MAP__MASK:
		mask = (struct cpu_map_mask *) data->data;

		mask->nr = bswap_16(mask->nr);
		mask->long_size = bswap_16(mask->long_size);

		switch (mask->long_size) {
		case 4: mem_bswap_32(&mask->mask, mask->nr); break;
		case 8: mem_bswap_64(&mask->mask, mask->nr); break;
		default:
			pr_err("cpu_map swap: unsupported long size\n");
		}
	default:
		break;
	}
}

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static void perf_event__stat_config_swap(union perf_event *event,
					 bool sample_id_all __maybe_unused)
{
	u64 size;

	size  = event->stat_config.nr * sizeof(event->stat_config.data[0]);
	size += 1; /* nr item itself */
	mem_bswap_64(&event->stat_config.nr, size);
}

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static void perf_event__stat_swap(union perf_event *event,
				  bool sample_id_all __maybe_unused)
{
	event->stat.id     = bswap_64(event->stat.id);
	event->stat.thread = bswap_32(event->stat.thread);
	event->stat.cpu    = bswap_32(event->stat.cpu);
	event->stat.val    = bswap_64(event->stat.val);
	event->stat.ena    = bswap_64(event->stat.ena);
	event->stat.run    = bswap_64(event->stat.run);
}

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static void perf_event__stat_round_swap(union perf_event *event,
					bool sample_id_all __maybe_unused)
{
	event->stat_round.type = bswap_64(event->stat_round.type);
	event->stat_round.time = bswap_64(event->stat_round.time);
}

790 791
typedef void (*perf_event__swap_op)(union perf_event *event,
				    bool sample_id_all);
792

793 794
static perf_event__swap_op perf_event__swap_ops[] = {
	[PERF_RECORD_MMAP]		  = perf_event__mmap_swap,
795
	[PERF_RECORD_MMAP2]		  = perf_event__mmap2_swap,
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	[PERF_RECORD_COMM]		  = perf_event__comm_swap,
	[PERF_RECORD_FORK]		  = perf_event__task_swap,
	[PERF_RECORD_EXIT]		  = perf_event__task_swap,
	[PERF_RECORD_LOST]		  = perf_event__all64_swap,
	[PERF_RECORD_READ]		  = perf_event__read_swap,
801 802
	[PERF_RECORD_THROTTLE]		  = perf_event__throttle_swap,
	[PERF_RECORD_UNTHROTTLE]	  = perf_event__throttle_swap,
803
	[PERF_RECORD_SAMPLE]		  = perf_event__all64_swap,
804
	[PERF_RECORD_AUX]		  = perf_event__aux_swap,
805
	[PERF_RECORD_ITRACE_START]	  = perf_event__itrace_start_swap,
806
	[PERF_RECORD_LOST_SAMPLES]	  = perf_event__all64_swap,
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	[PERF_RECORD_SWITCH]		  = perf_event__switch_swap,
	[PERF_RECORD_SWITCH_CPU_WIDE]	  = perf_event__switch_swap,
809
	[PERF_RECORD_HEADER_ATTR]	  = perf_event__hdr_attr_swap,
810 811 812
	[PERF_RECORD_HEADER_EVENT_TYPE]	  = perf_event__event_type_swap,
	[PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
	[PERF_RECORD_HEADER_BUILD_ID]	  = NULL,
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	[PERF_RECORD_ID_INDEX]		  = perf_event__all64_swap,
814 815
	[PERF_RECORD_AUXTRACE_INFO]	  = perf_event__auxtrace_info_swap,
	[PERF_RECORD_AUXTRACE]		  = perf_event__auxtrace_swap,
816
	[PERF_RECORD_AUXTRACE_ERROR]	  = perf_event__auxtrace_error_swap,
817
	[PERF_RECORD_THREAD_MAP]	  = perf_event__thread_map_swap,
818
	[PERF_RECORD_CPU_MAP]		  = perf_event__cpu_map_swap,
819
	[PERF_RECORD_STAT_CONFIG]	  = perf_event__stat_config_swap,
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	[PERF_RECORD_STAT]		  = perf_event__stat_swap,
821
	[PERF_RECORD_STAT_ROUND]	  = perf_event__stat_round_swap,
822
	[PERF_RECORD_EVENT_UPDATE]	  = perf_event__event_update_swap,
823
	[PERF_RECORD_HEADER_MAX]	  = NULL,
824 825
};

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/*
 * When perf record finishes a pass on every buffers, it records this pseudo
 * event.
 * We record the max timestamp t found in the pass n.
 * Assuming these timestamps are monotonic across cpus, we know that if
 * a buffer still has events with timestamps below t, they will be all
 * available and then read in the pass n + 1.
 * Hence when we start to read the pass n + 2, we can safely flush every
 * events with timestamps below t.
 *
 *    ============ PASS n =================
 *       CPU 0         |   CPU 1
 *                     |
 *    cnt1 timestamps  |   cnt2 timestamps
 *          1          |         2
 *          2          |         3
 *          -          |         4  <--- max recorded
 *
 *    ============ PASS n + 1 ==============
 *       CPU 0         |   CPU 1
 *                     |
 *    cnt1 timestamps  |   cnt2 timestamps
 *          3          |         5
 *          4          |         6
 *          5          |         7 <---- max recorded
 *
 *      Flush every events below timestamp 4
 *
 *    ============ PASS n + 2 ==============
 *       CPU 0         |   CPU 1
 *                     |
 *    cnt1 timestamps  |   cnt2 timestamps
 *          6          |         8
 *          7          |         9
 *          -          |         10
 *
 *      Flush every events below timestamp 7
 *      etc...
 */
865
static int process_finished_round(struct perf_tool *tool __maybe_unused,
866
				  union perf_event *event __maybe_unused,
867
				  struct ordered_events *oe)
868
{
869 870
	if (dump_trace)
		fprintf(stdout, "\n");
871
	return ordered_events__flush(oe, OE_FLUSH__ROUND);
872 873
}

874 875
int perf_session__queue_event(struct perf_session *s, union perf_event *event,
			      struct perf_sample *sample, u64 file_offset)
876
{
877
	return ordered_events__queue(&s->ordered_events, event, sample, file_offset);
878
}
879

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static void callchain__lbr_callstack_printf(struct perf_sample *sample)
881
{
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	struct ip_callchain *callchain = sample->callchain;
	struct branch_stack *lbr_stack = sample->branch_stack;
	u64 kernel_callchain_nr = callchain->nr;
885
	unsigned int i;
886

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	for (i = 0; i < kernel_callchain_nr; i++) {
		if (callchain->ips[i] == PERF_CONTEXT_USER)
			break;
	}

	if ((i != kernel_callchain_nr) && lbr_stack->nr) {
		u64 total_nr;
		/*
		 * LBR callstack can only get user call chain,
		 * i is kernel call chain number,
		 * 1 is PERF_CONTEXT_USER.
		 *
		 * The user call chain is stored in LBR registers.
		 * LBR are pair registers. The caller is stored
		 * in "from" register, while the callee is stored
		 * in "to" register.
		 * For example, there is a call stack
		 * "A"->"B"->"C"->"D".
		 * The LBR registers will recorde like
		 * "C"->"D", "B"->"C", "A"->"B".
		 * So only the first "to" register and all "from"
		 * registers are needed to construct the whole stack.
		 */
		total_nr = i + 1 + lbr_stack->nr + 1;
		kernel_callchain_nr = i + 1;

		printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);

		for (i = 0; i < kernel_callchain_nr; i++)
			printf("..... %2d: %016" PRIx64 "\n",
			       i, callchain->ips[i]);

		printf("..... %2d: %016" PRIx64 "\n",
		       (int)(kernel_callchain_nr), lbr_stack->entries[0].to);
		for (i = 0; i < lbr_stack->nr; i++)
			printf("..... %2d: %016" PRIx64 "\n",
			       (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
	}
}

static void callchain__printf(struct perf_evsel *evsel,
			      struct perf_sample *sample)
{
	unsigned int i;
	struct ip_callchain *callchain = sample->callchain;

	if (has_branch_callstack(evsel))
		callchain__lbr_callstack_printf(sample);

	printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
937

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	for (i = 0; i < callchain->nr; i++)
939
		printf("..... %2d: %016" PRIx64 "\n",
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		       i, callchain->ips[i]);
941 942
}

943 944 945 946 947 948
static void branch_stack__printf(struct perf_sample *sample)
{
	uint64_t i;

	printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);

949 950 951 952 953 954 955 956 957 958 959 960
	for (i = 0; i < sample->branch_stack->nr; i++) {
		struct branch_entry *e = &sample->branch_stack->entries[i];

		printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
			i, e->from, e->to,
			e->flags.cycles,
			e->flags.mispred ? "M" : " ",
			e->flags.predicted ? "P" : " ",
			e->flags.abort ? "A" : " ",
			e->flags.in_tx ? "T" : " ",
			(unsigned)e->flags.reserved);
	}
961 962
}

963 964 965 966 967 968 969 970 971 972 973 974
static void regs_dump__printf(u64 mask, u64 *regs)
{
	unsigned rid, i = 0;

	for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
		u64 val = regs[i++];

		printf(".... %-5s 0x%" PRIx64 "\n",
		       perf_reg_name(rid), val);
	}
}

975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000
static const char *regs_abi[] = {
	[PERF_SAMPLE_REGS_ABI_NONE] = "none",
	[PERF_SAMPLE_REGS_ABI_32] = "32-bit",
	[PERF_SAMPLE_REGS_ABI_64] = "64-bit",
};

static inline const char *regs_dump_abi(struct regs_dump *d)
{
	if (d->abi > PERF_SAMPLE_REGS_ABI_64)
		return "unknown";

	return regs_abi[d->abi];
}

static void regs__printf(const char *type, struct regs_dump *regs)
{
	u64 mask = regs->mask;

	printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
	       type,
	       mask,
	       regs_dump_abi(regs));

	regs_dump__printf(mask, regs->regs);
}

1001
static void regs_user__printf(struct perf_sample *sample)
1002 1003 1004
{
	struct regs_dump *user_regs = &sample->user_regs;

1005 1006 1007 1008 1009 1010 1011 1012 1013 1014
	if (user_regs->regs)
		regs__printf("user", user_regs);
}

static void regs_intr__printf(struct perf_sample *sample)
{
	struct regs_dump *intr_regs = &sample->intr_regs;

	if (intr_regs->regs)
		regs__printf("intr", intr_regs);
1015 1016 1017 1018 1019 1020 1021 1022
}

static void stack_user__printf(struct stack_dump *dump)
{
	printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
	       dump->size, dump->offset);
}

1023
static void perf_evlist__print_tstamp(struct perf_evlist *evlist,
1024
				       union perf_event *event,
1025
				       struct perf_sample *sample)
1026
{
1027
	u64 sample_type = __perf_evlist__combined_sample_type(evlist);
1028

1029
	if (event->header.type != PERF_RECORD_SAMPLE &&
1030
	    !perf_evlist__sample_id_all(evlist)) {
1031 1032 1033 1034
		fputs("-1 -1 ", stdout);
		return;
	}

1035
	if ((sample_type & PERF_SAMPLE_CPU))
1036 1037
		printf("%u ", sample->cpu);

1038
	if (sample_type & PERF_SAMPLE_TIME)
1039
		printf("%" PRIu64 " ", sample->time);
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
static void sample_read__printf(struct perf_sample *sample, u64 read_format)
{
	printf("... sample_read:\n");

	if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
		printf("...... time enabled %016" PRIx64 "\n",
		       sample->read.time_enabled);

	if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
		printf("...... time running %016" PRIx64 "\n",
		       sample->read.time_running);

	if (read_format & PERF_FORMAT_GROUP) {
		u64 i;

		printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);

		for (i = 0; i < sample->read.group.nr; i++) {
			struct sample_read_value *value;

			value = &sample->read.group.values[i];
			printf("..... id %016" PRIx64
			       ", value %016" PRIx64 "\n",
			       value->id, value->value);
		}
	} else
		printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
			sample->read.one.id, sample->read.one.value);
}

1072
static void dump_event(struct perf_evlist *evlist, union perf_event *event,
1073
		       u64 file_offset, struct perf_sample *sample)
1074 1075 1076 1077
{
	if (!dump_trace)
		return;

1078 1079
	printf("\n%#" PRIx64 " [%#x]: event: %d\n",
	       file_offset, event->header.size, event->header.type);
1080 1081 1082 1083

	trace_event(event);

	if (sample)
1084
		perf_evlist__print_tstamp(evlist, event, sample);
1085

1086
	printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1087
	       event->header.size, perf_event__name(event->header.type));
1088 1089
}

1090
static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
1091
			struct perf_sample *sample)
1092
{
1093 1094
	u64 sample_type;

1095 1096 1097
	if (!dump_trace)
		return;

1098
	printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1099
	       event->header.misc, sample->pid, sample->tid, sample->ip,
1100
	       sample->period, sample->addr);
1101

1102
	sample_type = evsel->attr.sample_type;
1103 1104

	if (sample_type & PERF_SAMPLE_CALLCHAIN)
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		callchain__printf(evsel, sample);
1106

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	if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !has_branch_callstack(evsel))
1108
		branch_stack__printf(sample);
1109 1110

	if (sample_type & PERF_SAMPLE_REGS_USER)
1111
		regs_user__printf(sample);
1112

1113 1114 1115
	if (sample_type & PERF_SAMPLE_REGS_INTR)
		regs_intr__printf(sample);

1116 1117
	if (sample_type & PERF_SAMPLE_STACK_USER)
		stack_user__printf(&sample->user_stack);
1118 1119 1120

	if (sample_type & PERF_SAMPLE_WEIGHT)
		printf("... weight: %" PRIu64 "\n", sample->weight);
1121 1122 1123

	if (sample_type & PERF_SAMPLE_DATA_SRC)
		printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1124

1125 1126 1127
	if (sample_type & PERF_SAMPLE_TRANSACTION)
		printf("... transaction: %" PRIx64 "\n", sample->transaction);

1128 1129
	if (sample_type & PERF_SAMPLE_READ)
		sample_read__printf(sample, evsel->attr.read_format);
1130 1131
}

1132
static struct machine *machines__find_for_cpumode(struct machines *machines,
1133 1134
					       union perf_event *event,
					       struct perf_sample *sample)
1135 1136
{
	const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1137
	struct machine *machine;
1138

1139 1140 1141
	if (perf_guest &&
	    ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
	     (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1142 1143
		u32 pid;

1144 1145
		if (event->header.type == PERF_RECORD_MMAP
		    || event->header.type == PERF_RECORD_MMAP2)
1146 1147
			pid = event->mmap.pid;
		else
1148
			pid = sample->pid;
1149

1150
		machine = machines__find(machines, pid);
1151
		if (!machine)
1152
			machine = machines__find(machines, DEFAULT_GUEST_KERNEL_ID);
1153
		return machine;
1154
	}
1155

1156
	return &machines->host;
1157 1158
}

1159
static int deliver_sample_value(struct perf_evlist *evlist,
1160 1161 1162 1163 1164 1165
				struct perf_tool *tool,
				union perf_event *event,
				struct perf_sample *sample,
				struct sample_read_value *v,
				struct machine *machine)
{
1166
	struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1167 1168 1169 1170 1171 1172 1173 1174

	if (sid) {
		sample->id     = v->id;
		sample->period = v->value - sid->period;
		sid->period    = v->value;
	}

	if (!sid || sid->evsel == NULL) {
1175
		++evlist->stats.nr_unknown_id;
1176 1177 1178 1179 1180 1181
		return 0;
	}

	return tool->sample(tool, event, sample, sid->evsel, machine);
}

1182
static int deliver_sample_group(struct perf_evlist *evlist,
1183 1184 1185 1186 1187 1188 1189 1190 1191
				struct perf_tool *tool,
				union  perf_event *event,
				struct perf_sample *sample,
				struct machine *machine)
{
	int ret = -EINVAL;
	u64 i;

	for (i = 0; i < sample->read.group.nr; i++) {
1192
		ret = deliver_sample_value(evlist, tool, event, sample,
1193 1194 1195 1196 1197 1198 1199 1200 1201 1202
					   &sample->read.group.values[i],
					   machine);
		if (ret)
			break;
	}

	return ret;
}

static int
1203
 perf_evlist__deliver_sample(struct perf_evlist *evlist,
1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219
			     struct perf_tool *tool,
			     union  perf_event *event,
			     struct perf_sample *sample,
			     struct perf_evsel *evsel,
			     struct machine *machine)
{
	/* We know evsel != NULL. */
	u64 sample_type = evsel->attr.sample_type;
	u64 read_format = evsel->attr.read_format;

	/* Standard sample delievery. */
	if (!(sample_type & PERF_SAMPLE_READ))
		return tool->sample(tool, event, sample, evsel, machine);

	/* For PERF_SAMPLE_READ we have either single or group mode. */
	if (read_format & PERF_FORMAT_GROUP)
1220
		return deliver_sample_group(evlist, tool, event, sample,
1221 1222
					    machine);
	else
1223
		return deliver_sample_value(evlist, tool, event, sample,
1224 1225 1226
					    &sample->read.one, machine);
}

1227 1228 1229 1230 1231
static int machines__deliver_event(struct machines *machines,
				   struct perf_evlist *evlist,
				   union perf_event *event,
				   struct perf_sample *sample,
				   struct perf_tool *tool, u64 file_offset)
1232
{
1233
	struct perf_evsel *evsel;
1234
	struct machine *machine;
1235

1236
	dump_event(evlist, event, file_offset, sample);
1237

1238
	evsel = perf_evlist__id2evsel(evlist, sample->id);
1239

1240
	machine = machines__find_for_cpumode(machines, event, sample);
1241

1242 1243
	switch (event->header.type) {
	case PERF_RECORD_SAMPLE:
1244
		if (evsel == NULL) {
1245
			++evlist->stats.nr_unknown_id;
1246
			return 0;
1247
		}
1248
		dump_sample(evsel, event, sample);
1249
		if (machine == NULL) {
1250
			++evlist->stats.nr_unprocessable_samples;
1251
			return 0;
1252
		}
1253
		return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1254
	case PERF_RECORD_MMAP:
1255
		return tool->mmap(tool, event, sample, machine);
1256
	case PERF_RECORD_MMAP2:
1257 1258
		if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
			++evlist->stats.nr_proc_map_timeout;
1259
		return tool->mmap2(tool, event, sample, machine);
1260
	case PERF_RECORD_COMM:
1261
		return tool->comm(tool, event, sample, machine);
1262
	case PERF_RECORD_FORK:
1263
		return tool->fork(tool, event, sample, machine);
1264
	case PERF_RECORD_EXIT:
1265
		return tool->exit(tool, event, sample, machine);
1266
	case PERF_RECORD_LOST:
1267
		if (tool->lost == perf_event__process_lost)
1268
			evlist->stats.total_lost += event->lost.lost;
1269
		return tool->lost(tool, event, sample, machine);
1270 1271 1272 1273
	case PERF_RECORD_LOST_SAMPLES:
		if (tool->lost_samples == perf_event__process_lost_samples)
			evlist->stats.total_lost_samples += event->lost_samples.lost;
		return tool->lost_samples(tool, event, sample, machine);
1274
	case PERF_RECORD_READ:
1275
		return tool->read(tool, event, sample, evsel, machine);
1276
	case PERF_RECORD_THROTTLE:
1277
		return tool->throttle(tool, event, sample, machine);
1278
	case PERF_RECORD_UNTHROTTLE:
1279
		return tool->unthrottle(tool, event, sample, machine);
1280
	case PERF_RECORD_AUX:
1281 1282 1283
		if (tool->aux == perf_event__process_aux &&
		    (event->aux.flags & PERF_AUX_FLAG_TRUNCATED))
			evlist->stats.total_aux_lost += 1;
1284
		return tool->aux(tool, event, sample, machine);
1285 1286
	case PERF_RECORD_ITRACE_START:
		return tool->itrace_start(tool, event, sample, machine);
1287 1288 1289
	case PERF_RECORD_SWITCH:
	case PERF_RECORD_SWITCH_CPU_WIDE:
		return tool->context_switch(tool, event, sample, machine);
1290
	default:
1291
		++evlist->stats.nr_unknown_events;
1292 1293 1294 1295
		return -1;
	}
}

1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313
static int perf_session__deliver_event(struct perf_session *session,
				       union perf_event *event,
				       struct perf_sample *sample,
				       struct perf_tool *tool,
				       u64 file_offset)
{
	int ret;

	ret = auxtrace__process_event(session, event, sample, tool);
	if (ret < 0)
		return ret;
	if (ret > 0)
		return 0;

	return machines__deliver_event(&session->machines, session->evlist,
				       event, sample, tool, file_offset);
}

1314 1315 1316
static s64 perf_session__process_user_event(struct perf_session *session,
					    union perf_event *event,
					    u64 file_offset)
1317
{
1318
	struct ordered_events *oe = &session->ordered_events;
1319
	struct perf_tool *tool = session->tool;
1320
	int fd = perf_data_file__fd(session->file);
1321 1322
	int err;

1323
	dump_event(session->evlist, event, file_offset, NULL);
1324

1325
	/* These events are processed right away */
1326
	switch (event->header.type) {
1327
	case PERF_RECORD_HEADER_ATTR:
1328
		err = tool->attr(tool, event, &session->evlist);
1329
		if (err == 0) {
1330
			perf_session__set_id_hdr_size(session);
1331 1332
			perf_session__set_comm_exec(session);
		}
1333
		return err;
1334 1335
	case PERF_RECORD_EVENT_UPDATE:
		return tool->event_update(tool, event, &session->evlist);
1336 1337 1338 1339 1340 1341
	case PERF_RECORD_HEADER_EVENT_TYPE:
		/*
		 * Depreceated, but we need to handle it for sake
		 * of old data files create in pipe mode.
		 */
		return 0;
1342 1343
	case PERF_RECORD_HEADER_TRACING_DATA:
		/* setup for reading amidst mmap */
1344
		lseek(fd, file_offset, SEEK_SET);
1345
		return tool->tracing_data(tool, event, session);
1346
	case PERF_RECORD_HEADER_BUILD_ID:
1347
		return tool->build_id(tool, event, session);
1348
	case PERF_RECORD_FINISHED_ROUND:
1349
		return tool->finished_round(tool, event, oe);
A
Adrian Hunter 已提交
1350 1351
	case PERF_RECORD_ID_INDEX:
		return tool->id_index(tool, event, session);
1352 1353 1354 1355 1356 1357
	case PERF_RECORD_AUXTRACE_INFO:
		return tool->auxtrace_info(tool, event, session);
	case PERF_RECORD_AUXTRACE:
		/* setup for reading amidst mmap */
		lseek(fd, file_offset + event->header.size, SEEK_SET);
		return tool->auxtrace(tool, event, session);
1358
	case PERF_RECORD_AUXTRACE_ERROR:
1359
		perf_session__auxtrace_error_inc(session, event);
1360
		return tool->auxtrace_error(tool, event, session);
1361 1362
	case PERF_RECORD_THREAD_MAP:
		return tool->thread_map(tool, event, session);
1363 1364
	case PERF_RECORD_CPU_MAP:
		return tool->cpu_map(tool, event, session);
1365 1366
	case PERF_RECORD_STAT_CONFIG:
		return tool->stat_config(tool, event, session);
J
Jiri Olsa 已提交
1367 1368
	case PERF_RECORD_STAT:
		return tool->stat(tool, event, session);
1369 1370
	case PERF_RECORD_STAT_ROUND:
		return tool->stat_round(tool, event, session);
1371
	default:
1372
		return -EINVAL;
1373
	}
1374 1375
}

1376 1377
int perf_session__deliver_synth_event(struct perf_session *session,
				      union perf_event *event,
1378
				      struct perf_sample *sample)
1379
{
1380
	struct perf_evlist *evlist = session->evlist;
1381
	struct perf_tool *tool = session->tool;
1382 1383

	events_stats__inc(&evlist->stats, event->header.type);
1384 1385

	if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1386
		return perf_session__process_user_event(session, event, 0);
1387

1388
	return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1389 1390
}

1391 1392 1393 1394 1395 1396 1397 1398 1399
static void event_swap(union perf_event *event, bool sample_id_all)
{
	perf_event__swap_op swap;

	swap = perf_event__swap_ops[event->header.type];
	if (swap)
		swap(event, sample_id_all);
}

1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424
int perf_session__peek_event(struct perf_session *session, off_t file_offset,
			     void *buf, size_t buf_sz,
			     union perf_event **event_ptr,
			     struct perf_sample *sample)
{
	union perf_event *event;
	size_t hdr_sz, rest;
	int fd;

	if (session->one_mmap && !session->header.needs_swap) {
		event = file_offset - session->one_mmap_offset +
			session->one_mmap_addr;
		goto out_parse_sample;
	}

	if (perf_data_file__is_pipe(session->file))
		return -1;

	fd = perf_data_file__fd(session->file);
	hdr_sz = sizeof(struct perf_event_header);

	if (buf_sz < hdr_sz)
		return -1;

	if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1425
	    readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1426 1427 1428 1429 1430 1431 1432
		return -1;

	event = (union perf_event *)buf;

	if (session->header.needs_swap)
		perf_event_header__bswap(&event->header);

1433
	if (event->header.size < hdr_sz || event->header.size > buf_sz)
1434 1435 1436 1437
		return -1;

	rest = event->header.size - hdr_sz;

1438
	if (readn(fd, buf, rest) != (ssize_t)rest)
1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454
		return -1;

	if (session->header.needs_swap)
		event_swap(event, perf_evlist__sample_id_all(session->evlist));

out_parse_sample:

	if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
	    perf_evlist__parse_sample(session->evlist, event, sample))
		return -1;

	*event_ptr = event;

	return 0;
}

1455
static s64 perf_session__process_event(struct perf_session *session,
1456
				       union perf_event *event, u64 file_offset)
1457
{
1458
	struct perf_evlist *evlist = session->evlist;
1459
	struct perf_tool *tool = session->tool;
1460
	struct perf_sample sample;
1461 1462
	int ret;

1463
	if (session->header.needs_swap)
1464
		event_swap(event, perf_evlist__sample_id_all(evlist));
1465 1466 1467 1468

	if (event->header.type >= PERF_RECORD_HEADER_MAX)
		return -EINVAL;

1469
	events_stats__inc(&evlist->stats, event->header.type);
1470 1471

	if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1472
		return perf_session__process_user_event(session, event, file_offset);
1473

1474 1475 1476
	/*
	 * For all kernel events we get the sample data
	 */
1477
	ret = perf_evlist__parse_sample(evlist, event, &sample);
1478 1479
	if (ret)
		return ret;
1480

1481
	if (tool->ordered_events) {
1482
		ret = perf_session__queue_event(session, event, &sample, file_offset);
1483 1484 1485 1486
		if (ret != -ETIME)
			return ret;
	}

1487 1488
	return perf_session__deliver_event(session, event, &sample, tool,
					   file_offset);
1489 1490
}

1491
void perf_event_header__bswap(struct perf_event_header *hdr)
1492
{
1493 1494 1495
	hdr->type = bswap_32(hdr->type);
	hdr->misc = bswap_16(hdr->misc);
	hdr->size = bswap_16(hdr->size);
1496 1497
}

1498 1499
struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
{
1500
	return machine__findnew_thread(&session->machines.host, -1, pid);
1501 1502
}

1503
int perf_session__register_idle_thread(struct perf_session *session)
1504
{
1505
	struct thread *thread;
1506
	int err = 0;
1507

1508
	thread = machine__findnew_thread(&session->machines.host, 0, 0);
1509
	if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1510
		pr_err("problem inserting idle task.\n");
1511
		err = -1;
1512 1513
	}

1514 1515 1516
	/* machine__findnew_thread() got the thread, so put it */
	thread__put(thread);
	return err;
1517 1518
}

1519
static void perf_session__warn_about_errors(const struct perf_session *session)
1520
{
1521 1522 1523 1524
	const struct events_stats *stats = &session->evlist->stats;
	const struct ordered_events *oe = &session->ordered_events;

	if (session->tool->lost == perf_event__process_lost &&
1525
	    stats->nr_events[PERF_RECORD_LOST] != 0) {
1526 1527
		ui__warning("Processed %d events and lost %d chunks!\n\n"
			    "Check IO/CPU overload!\n\n",
1528 1529
			    stats->nr_events[0],
			    stats->nr_events[PERF_RECORD_LOST]);
1530 1531
	}

1532 1533 1534 1535 1536 1537
	if (session->tool->lost_samples == perf_event__process_lost_samples) {
		double drop_rate;

		drop_rate = (double)stats->total_lost_samples /
			    (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
		if (drop_rate > 0.05) {
1538
			ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n",
1539 1540 1541 1542 1543
				    stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
				    drop_rate * 100.0);
		}
	}

1544 1545 1546 1547 1548 1549 1550
	if (session->tool->aux == perf_event__process_aux &&
	    stats->total_aux_lost != 0) {
		ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
			    stats->total_aux_lost,
			    stats->nr_events[PERF_RECORD_AUX]);
	}

1551
	if (stats->nr_unknown_events != 0) {
1552 1553 1554 1555 1556
		ui__warning("Found %u unknown events!\n\n"
			    "Is this an older tool processing a perf.data "
			    "file generated by a more recent tool?\n\n"
			    "If that is not the case, consider "
			    "reporting to linux-kernel@vger.kernel.org.\n\n",
1557
			    stats->nr_unknown_events);
1558 1559
	}

1560
	if (stats->nr_unknown_id != 0) {
1561
		ui__warning("%u samples with id not present in the header\n",
1562
			    stats->nr_unknown_id);
1563 1564
	}

1565
	if (stats->nr_invalid_chains != 0) {
1566 1567 1568
		ui__warning("Found invalid callchains!\n\n"
			    "%u out of %u events were discarded for this reason.\n\n"
			    "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1569 1570
			    stats->nr_invalid_chains,
			    stats->nr_events[PERF_RECORD_SAMPLE]);
1571
	}
1572

1573
	if (stats->nr_unprocessable_samples != 0) {
1574 1575
		ui__warning("%u unprocessable samples recorded.\n"
			    "Do you have a KVM guest running and not using 'perf kvm'?\n",
1576
			    stats->nr_unprocessable_samples);
1577
	}
1578

1579 1580
	if (oe->nr_unordered_events != 0)
		ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1581 1582

	events_stats__auxtrace_error_warn(stats);
1583 1584 1585 1586 1587 1588

	if (stats->nr_proc_map_timeout != 0) {
		ui__warning("%d map information files for pre-existing threads were\n"
			    "not processed, if there are samples for addresses they\n"
			    "will not be resolved, you may find out which are these\n"
			    "threads by running with -v and redirecting the output\n"
1589 1590 1591
			    "to a file.\n"
			    "The time limit to process proc map is too short?\n"
			    "Increase it by --proc-map-timeout\n",
1592 1593
			    stats->nr_proc_map_timeout);
	}
1594 1595
}

1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608
static int perf_session__flush_thread_stack(struct thread *thread,
					    void *p __maybe_unused)
{
	return thread_stack__flush(thread);
}

static int perf_session__flush_thread_stacks(struct perf_session *session)
{
	return machines__for_each_thread(&session->machines,
					 perf_session__flush_thread_stack,
					 NULL);
}

1609 1610
volatile int session_done;

1611
static int __perf_session__process_pipe_events(struct perf_session *session)
1612
{
1613
	struct ordered_events *oe = &session->ordered_events;
1614
	struct perf_tool *tool = session->tool;
1615
	int fd = perf_data_file__fd(session->file);
1616 1617 1618
	union perf_event *event;
	uint32_t size, cur_size = 0;
	void *buf = NULL;
1619
	s64 skip = 0;
1620
	u64 head;
1621
	ssize_t err;
1622 1623
	void *p;

1624
	perf_tool__fill_defaults(tool);
1625 1626

	head = 0;
1627 1628 1629 1630 1631
	cur_size = sizeof(union perf_event);

	buf = malloc(cur_size);
	if (!buf)
		return -errno;
1632
more:
1633
	event = buf;
1634
	err = readn(fd, event, sizeof(struct perf_event_header));
1635 1636 1637 1638 1639 1640 1641 1642
	if (err <= 0) {
		if (err == 0)
			goto done;

		pr_err("failed to read event header\n");
		goto out_err;
	}

1643
	if (session->header.needs_swap)
1644
		perf_event_header__bswap(&event->header);
1645

1646
	size = event->header.size;
1647 1648 1649 1650
	if (size < sizeof(struct perf_event_header)) {
		pr_err("bad event header size\n");
		goto out_err;
	}
1651

1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662
	if (size > cur_size) {
		void *new = realloc(buf, size);
		if (!new) {
			pr_err("failed to allocate memory to read event\n");
			goto out_err;
		}
		buf = new;
		cur_size = size;
		event = buf;
	}
	p = event;
1663 1664
	p += sizeof(struct perf_event_header);

1665
	if (size - sizeof(struct perf_event_header)) {
1666
		err = readn(fd, p, size - sizeof(struct perf_event_header));
1667 1668 1669 1670 1671
		if (err <= 0) {
			if (err == 0) {
				pr_err("unexpected end of event stream\n");
				goto done;
			}
1672

1673 1674 1675
			pr_err("failed to read event data\n");
			goto out_err;
		}
1676 1677
	}

1678
	if ((skip = perf_session__process_event(session, event, head)) < 0) {
1679
		pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1680
		       head, event->header.size, event->header.type);
1681 1682
		err = -EINVAL;
		goto out_err;
1683 1684 1685 1686 1687 1688 1689 1690 1691 1692
	}

	head += size;

	if (skip > 0)
		head += skip;

	if (!session_done())
		goto more;
done:
1693
	/* do the final flush for ordered samples */
1694
	err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1695 1696 1697
	if (err)
		goto out_err;
	err = auxtrace__flush_events(session, tool);
1698 1699 1700
	if (err)
		goto out_err;
	err = perf_session__flush_thread_stacks(session);
1701
out_err:
1702
	free(buf);
1703
	perf_session__warn_about_errors(session);
1704
	ordered_events__free(&session->ordered_events);
1705
	auxtrace__free_events(session);
1706 1707 1708
	return err;
}

1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726
static union perf_event *
fetch_mmaped_event(struct perf_session *session,
		   u64 head, size_t mmap_size, char *buf)
{
	union perf_event *event;

	/*
	 * Ensure we have enough space remaining to read
	 * the size of the event in the headers.
	 */
	if (head + sizeof(event->header) > mmap_size)
		return NULL;

	event = (union perf_event *)(buf + head);

	if (session->header.needs_swap)
		perf_event_header__bswap(&event->header);

1727 1728 1729 1730
	if (head + event->header.size > mmap_size) {
		/* We're not fetching the event so swap back again */
		if (session->header.needs_swap)
			perf_event_header__bswap(&event->header);
1731
		return NULL;
1732
	}
1733 1734 1735 1736

	return event;
}

1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748
/*
 * On 64bit we can mmap the data file in one go. No need for tiny mmap
 * slices. On 32bit we use 32MB.
 */
#if BITS_PER_LONG == 64
#define MMAP_SIZE ULLONG_MAX
#define NUM_MMAPS 1
#else
#define MMAP_SIZE (32 * 1024 * 1024ULL)
#define NUM_MMAPS 128
#endif

1749 1750
static int __perf_session__process_events(struct perf_session *session,
					  u64 data_offset, u64 data_size,
1751
					  u64 file_size)
1752
{
1753
	struct ordered_events *oe = &session->ordered_events;
1754
	struct perf_tool *tool = session->tool;
1755
	int fd = perf_data_file__fd(session->file);
1756
	u64 head, page_offset, file_offset, file_pos, size;
1757
	int err, mmap_prot, mmap_flags, map_idx = 0;
1758
	size_t	mmap_size;
1759
	char *buf, *mmaps[NUM_MMAPS];
1760
	union perf_event *event;
1761
	struct ui_progress prog;
1762
	s64 skip;
1763

1764
	perf_tool__fill_defaults(tool);
1765

1766 1767 1768
	page_offset = page_size * (data_offset / page_size);
	file_offset = page_offset;
	head = data_offset - page_offset;
1769

1770 1771 1772 1773
	if (data_size == 0)
		goto out;

	if (data_offset + data_size < file_size)
1774 1775
		file_size = data_offset + data_size;

1776
	ui_progress__init(&prog, file_size, "Processing events...");
1777

1778
	mmap_size = MMAP_SIZE;
1779
	if (mmap_size > file_size) {
1780
		mmap_size = file_size;
1781 1782
		session->one_mmap = true;
	}
1783

1784 1785
	memset(mmaps, 0, sizeof(mmaps));

1786 1787 1788
	mmap_prot  = PROT_READ;
	mmap_flags = MAP_SHARED;

1789
	if (session->header.needs_swap) {
1790 1791 1792
		mmap_prot  |= PROT_WRITE;
		mmap_flags = MAP_PRIVATE;
	}
1793
remap:
1794
	buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1795
		   file_offset);
1796 1797 1798 1799 1800
	if (buf == MAP_FAILED) {
		pr_err("failed to mmap file\n");
		err = -errno;
		goto out_err;
	}
1801 1802
	mmaps[map_idx] = buf;
	map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1803
	file_pos = file_offset + head;
1804 1805 1806 1807
	if (session->one_mmap) {
		session->one_mmap_addr = buf;
		session->one_mmap_offset = file_offset;
	}
1808 1809

more:
1810 1811
	event = fetch_mmaped_event(session, head, mmap_size, buf);
	if (!event) {
1812 1813 1814 1815
		if (mmaps[map_idx]) {
			munmap(mmaps[map_idx], mmap_size);
			mmaps[map_idx] = NULL;
		}
1816

1817 1818 1819
		page_offset = page_size * (head / page_size);
		file_offset += page_offset;
		head -= page_offset;
1820 1821 1822 1823 1824
		goto remap;
	}

	size = event->header.size;

1825
	if (size < sizeof(struct perf_event_header) ||
1826
	    (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1827 1828 1829 1830 1831
		pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
		       file_offset + head, event->header.size,
		       event->header.type);
		err = -EINVAL;
		goto out_err;
1832 1833
	}

1834 1835 1836
	if (skip)
		size += skip;

1837
	head += size;
1838
	file_pos += size;
1839

1840
	ui_progress__update(&prog, size);
1841

1842
	if (session_done())
1843
		goto out;
1844

1845
	if (file_pos < file_size)
1846
		goto more;
1847

1848
out:
1849
	/* do the final flush for ordered samples */
1850
	err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1851 1852 1853
	if (err)
		goto out_err;
	err = auxtrace__flush_events(session, tool);
1854 1855 1856
	if (err)
		goto out_err;
	err = perf_session__flush_thread_stacks(session);
1857
out_err:
N
Namhyung Kim 已提交
1858
	ui_progress__finish();
1859
	perf_session__warn_about_errors(session);
1860
	ordered_events__free(&session->ordered_events);
1861
	auxtrace__free_events(session);
1862
	session->one_mmap = false;
1863 1864
	return err;
}
1865

1866
int perf_session__process_events(struct perf_session *session)
1867
{
1868
	u64 size = perf_data_file__size(session->file);
1869 1870
	int err;

1871
	if (perf_session__register_idle_thread(session) < 0)
1872 1873
		return -ENOMEM;

1874 1875 1876
	if (!perf_data_file__is_pipe(session->file))
		err = __perf_session__process_events(session,
						     session->header.data_offset,
1877
						     session->header.data_size, size);
1878
	else
1879
		err = __perf_session__process_pipe_events(session);
1880

1881 1882 1883
	return err;
}

1884
bool perf_session__has_traces(struct perf_session *session, const char *msg)
1885
{
1886 1887
	struct perf_evsel *evsel;

1888
	evlist__for_each(session->evlist, evsel) {
1889 1890
		if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
			return true;
1891 1892
	}

1893 1894
	pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
	return false;
1895
}
1896

1897 1898
int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
				     const char *symbol_name, u64 addr)
1899 1900
{
	char *bracket;
1901
	enum map_type i;
1902 1903 1904 1905 1906
	struct ref_reloc_sym *ref;

	ref = zalloc(sizeof(struct ref_reloc_sym));
	if (ref == NULL)
		return -ENOMEM;
1907

1908 1909 1910
	ref->name = strdup(symbol_name);
	if (ref->name == NULL) {
		free(ref);
1911
		return -ENOMEM;
1912
	}
1913

1914
	bracket = strchr(ref->name, ']');
1915 1916 1917
	if (bracket)
		*bracket = '\0';

1918
	ref->addr = addr;
1919 1920

	for (i = 0; i < MAP__NR_TYPES; ++i) {
1921
		struct kmap *kmap = map__kmap(maps[i]);
1922 1923 1924

		if (!kmap)
			continue;
1925
		kmap->ref_reloc_sym = ref;
1926 1927
	}

1928 1929
	return 0;
}
1930

1931
size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1932
{
1933
	return machines__fprintf_dsos(&session->machines, fp);
1934
}
1935

1936
size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1937
					  bool (skip)(struct dso *dso, int parm), int parm)
1938
{
1939
	return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1940
}
1941 1942 1943

size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
{
1944 1945 1946 1947 1948 1949
	size_t ret;
	const char *msg = "";

	if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
		msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";

1950
	ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
1951

1952
	ret += events_stats__fprintf(&session->evlist->stats, fp);
1953 1954
	return ret;
}
1955

1956 1957 1958 1959 1960 1961
size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
{
	/*
	 * FIXME: Here we have to actually print all the machines in this
	 * session, not just the host...
	 */
1962
	return machine__fprintf(&session->machines.host, fp);
1963 1964
}

1965 1966 1967 1968 1969
struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
					      unsigned int type)
{
	struct perf_evsel *pos;

1970
	evlist__for_each(session->evlist, pos) {
1971 1972 1973 1974 1975 1976
		if (pos->attr.type == type)
			return pos;
	}
	return NULL;
}

1977
void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1978
			  struct addr_location *al,
1979
			  unsigned int print_opts, unsigned int stack_depth)
1980 1981
{
	struct callchain_cursor_node *node;
1982 1983 1984 1985
	int print_ip = print_opts & PRINT_IP_OPT_IP;
	int print_sym = print_opts & PRINT_IP_OPT_SYM;
	int print_dso = print_opts & PRINT_IP_OPT_DSO;
	int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1986
	int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1987
	int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1988
	char s = print_oneline ? ' ' : '\t';
1989 1990

	if (symbol_conf.use_callchain && sample->callchain) {
1991
		struct addr_location node_al;
1992

1993 1994
		if (thread__resolve_callchain(al->thread, evsel,
					      sample, NULL, NULL,
1995
					      stack_depth) != 0) {
1996 1997 1998 1999
			if (verbose)
				error("Failed to resolve callchain. Skipping\n");
			return;
		}
2000
		callchain_cursor_commit(&callchain_cursor);
2001

2002 2003 2004
		if (print_symoffset)
			node_al = *al;

2005
		while (stack_depth) {
2006 2007
			u64 addr = 0;

2008
			node = callchain_cursor_current(&callchain_cursor);
2009 2010 2011
			if (!node)
				break;

2012 2013 2014
			if (node->sym && node->sym->ignore)
				goto next;

2015
			if (print_ip)
2016
				printf("%c%16" PRIx64, s, node->ip);
2017

2018 2019 2020
			if (node->map)
				addr = node->map->map_ip(node->map, node->ip);

2021
			if (print_sym) {
2022
				printf(" ");
2023
				if (print_symoffset) {
2024
					node_al.addr = addr;
2025 2026
					node_al.map  = node->map;
					symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
2027 2028
				} else
					symbol__fprintf_symname(node->sym, stdout);
2029
			}
2030

2031
			if (print_dso) {
2032
				printf(" (");
2033
				map__fprintf_dsoname(node->map, stdout);
2034
				printf(")");
2035
			}
2036

2037 2038 2039 2040
			if (print_srcline)
				map__fprintf_srcline(node->map, addr, "\n  ",
						     stdout);

2041 2042
			if (!print_oneline)
				printf("\n");
2043

2044
			stack_depth--;
2045 2046
next:
			callchain_cursor_advance(&callchain_cursor);
2047 2048 2049
		}

	} else {
2050
		if (al->sym && al->sym->ignore)
2051 2052
			return;

2053 2054 2055
		if (print_ip)
			printf("%16" PRIx64, sample->ip);

2056
		if (print_sym) {
2057
			printf(" ");
2058
			if (print_symoffset)
2059
				symbol__fprintf_symname_offs(al->sym, al,
2060 2061
							     stdout);
			else
2062
				symbol__fprintf_symname(al->sym, stdout);
2063 2064 2065
		}

		if (print_dso) {
2066
			printf(" (");
2067
			map__fprintf_dsoname(al->map, stdout);
2068
			printf(")");
2069
		}
2070 2071 2072

		if (print_srcline)
			map__fprintf_srcline(al->map, al->addr, "\n  ", stdout);
2073 2074
	}
}
2075 2076 2077 2078

int perf_session__cpu_bitmap(struct perf_session *session,
			     const char *cpu_list, unsigned long *cpu_bitmap)
{
2079
	int i, err = -1;
2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096
	struct cpu_map *map;

	for (i = 0; i < PERF_TYPE_MAX; ++i) {
		struct perf_evsel *evsel;

		evsel = perf_session__find_first_evtype(session, i);
		if (!evsel)
			continue;

		if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
			pr_err("File does not contain CPU events. "
			       "Remove -c option to proceed.\n");
			return -1;
		}
	}

	map = cpu_map__new(cpu_list);
2097 2098 2099 2100
	if (map == NULL) {
		pr_err("Invalid cpu_list\n");
		return -1;
	}
2101 2102 2103 2104 2105 2106 2107

	for (i = 0; i < map->nr; i++) {
		int cpu = map->map[i];

		if (cpu >= MAX_NR_CPUS) {
			pr_err("Requested CPU %d too large. "
			       "Consider raising MAX_NR_CPUS\n", cpu);
2108
			goto out_delete_map;
2109 2110 2111 2112 2113
		}

		set_bit(cpu, cpu_bitmap);
	}

2114 2115 2116
	err = 0;

out_delete_map:
2117
	cpu_map__put(map);
2118
	return err;
2119
}
2120 2121 2122 2123 2124

void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
				bool full)
{
	struct stat st;
2125
	int fd, ret;
2126 2127 2128 2129

	if (session == NULL || fp == NULL)
		return;

2130 2131
	fd = perf_data_file__fd(session->file);

2132
	ret = fstat(fd, &st);
2133 2134 2135 2136 2137 2138 2139 2140
	if (ret == -1)
		return;

	fprintf(fp, "# ========\n");
	fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
	perf_header__fprintf_info(session, fp, full);
	fprintf(fp, "# ========\n#\n");
}
2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151


int __perf_session__set_tracepoints_handlers(struct perf_session *session,
					     const struct perf_evsel_str_handler *assocs,
					     size_t nr_assocs)
{
	struct perf_evsel *evsel;
	size_t i;
	int err;

	for (i = 0; i < nr_assocs; i++) {
2152 2153 2154 2155 2156
		/*
		 * Adding a handler for an event not in the session,
		 * just ignore it.
		 */
		evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
2157
		if (evsel == NULL)
2158
			continue;
2159 2160

		err = -EEXIST;
2161
		if (evsel->handler != NULL)
2162
			goto out;
2163
		evsel->handler = assocs[i].handler;
2164 2165 2166 2167 2168 2169
	}

	err = 0;
out:
	return err;
}
A
Adrian Hunter 已提交
2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223

int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
				 union perf_event *event,
				 struct perf_session *session)
{
	struct perf_evlist *evlist = session->evlist;
	struct id_index_event *ie = &event->id_index;
	size_t i, nr, max_nr;

	max_nr = (ie->header.size - sizeof(struct id_index_event)) /
		 sizeof(struct id_index_entry);
	nr = ie->nr;
	if (nr > max_nr)
		return -EINVAL;

	if (dump_trace)
		fprintf(stdout, " nr: %zu\n", nr);

	for (i = 0; i < nr; i++) {
		struct id_index_entry *e = &ie->entries[i];
		struct perf_sample_id *sid;

		if (dump_trace) {
			fprintf(stdout,	" ... id: %"PRIu64, e->id);
			fprintf(stdout,	"  idx: %"PRIu64, e->idx);
			fprintf(stdout,	"  cpu: %"PRId64, e->cpu);
			fprintf(stdout,	"  tid: %"PRId64"\n", e->tid);
		}

		sid = perf_evlist__id2sid(evlist, e->id);
		if (!sid)
			return -ENOENT;
		sid->idx = e->idx;
		sid->cpu = e->cpu;
		sid->tid = e->tid;
	}
	return 0;
}

int perf_event__synthesize_id_index(struct perf_tool *tool,
				    perf_event__handler_t process,
				    struct perf_evlist *evlist,
				    struct machine *machine)
{
	union perf_event *ev;
	struct perf_evsel *evsel;
	size_t nr = 0, i = 0, sz, max_nr, n;
	int err;

	pr_debug2("Synthesizing id index\n");

	max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
		 sizeof(struct id_index_entry);

2224
	evlist__for_each(evlist, evsel)
A
Adrian Hunter 已提交
2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236
		nr += evsel->ids;

	n = nr > max_nr ? max_nr : nr;
	sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
	ev = zalloc(sz);
	if (!ev)
		return -ENOMEM;

	ev->id_index.header.type = PERF_RECORD_ID_INDEX;
	ev->id_index.header.size = sz;
	ev->id_index.nr = n;

2237
	evlist__for_each(evlist, evsel) {
A
Adrian Hunter 已提交
2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277
		u32 j;

		for (j = 0; j < evsel->ids; j++) {
			struct id_index_entry *e;
			struct perf_sample_id *sid;

			if (i >= n) {
				err = process(tool, ev, NULL, machine);
				if (err)
					goto out_err;
				nr -= n;
				i = 0;
			}

			e = &ev->id_index.entries[i++];

			e->id = evsel->id[j];

			sid = perf_evlist__id2sid(evlist, e->id);
			if (!sid) {
				free(ev);
				return -ENOENT;
			}

			e->idx = sid->idx;
			e->cpu = sid->cpu;
			e->tid = sid->tid;
		}
	}

	sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
	ev->id_index.header.size = sz;
	ev->id_index.nr = nr;

	err = process(tool, ev, NULL, machine);
out_err:
	free(ev);

	return err;
}