session.c 59.2 KB
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#include <inttypes.h>
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#include <linux/kernel.h>
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#include <traceevent/event-parse.h>
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#include <api/fs/fs.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;

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	evlist__for_each_entry(session->evlist, evsel) {
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		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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			/*
			 * set session attributes that are present in perf.data
			 * but not in pipe-mode.
			 */
			if (!file->is_pipe) {
				perf_session__set_id_hdr_size(session);
				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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	/*
	 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
	 * processed, so perf_evlist__sample_id_all is not meaningful here.
	 */
	if ((!file || !file->is_pipe) && 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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	if (session == NULL)
		return;
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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_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 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_op2_stub(struct perf_tool *tool __maybe_unused,
				  union perf_event *event __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_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_event_op2_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)
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		tool->id_index = process_event_op2_stub;
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	if (tool->auxtrace_info == NULL)
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		tool->auxtrace_info = process_event_op2_stub;
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	if (tool->auxtrace == NULL)
		tool->auxtrace = process_event_auxtrace_stub;
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	if (tool->auxtrace_error == NULL)
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		tool->auxtrace_error = process_event_op2_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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	if (tool->time_conv == NULL)
		tool->time_conv = process_event_op2_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
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 * through endian village. ABI says:
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 *
 * 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)
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#define bswap_field_16(f) bswap_field(f, 16)
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#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);
626
	bswap_field_16(sample_max_stack);
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	/*
	 * 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
639 640
}

641
static void perf_event__hdr_attr_swap(union perf_event *event,
642
				      bool sample_id_all __maybe_unused)
643 644 645
{
	size_t size;

646
	perf_event__attr_swap(&event->attr.attr);
647

648 649 650
	size = event->header.size;
	size -= (void *)&event->attr.id - (void *)event;
	mem_bswap_64(event->attr.id, size);
651 652
}

653 654 655 656 657 658 659
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);
}

660
static void perf_event__event_type_swap(union perf_event *event,
661
					bool sample_id_all __maybe_unused)
662
{
663 664
	event->event_type.event_type.event_id =
		bswap_64(event->event_type.event_type.event_id);
665 666
}

667
static void perf_event__tracing_data_swap(union perf_event *event,
668
					  bool sample_id_all __maybe_unused)
669
{
670
	event->tracing_data.size = bswap_32(event->tracing_data.size);
671 672
}

673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695
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);
}

696 697 698 699 700 701 702 703 704 705 706
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);
}

707 708 709 710 711 712 713 714 715 716 717
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;
	}
}

754 755 756 757 758 759 760 761 762 763
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);
}

775 776 777 778 779 780 781
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);
}

782 783
typedef void (*perf_event__swap_op)(union perf_event *event,
				    bool sample_id_all);
784

785 786
static perf_event__swap_op perf_event__swap_ops[] = {
	[PERF_RECORD_MMAP]		  = perf_event__mmap_swap,
787
	[PERF_RECORD_MMAP2]		  = perf_event__mmap2_swap,
788 789 790 791 792
	[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,
793 794
	[PERF_RECORD_THROTTLE]		  = perf_event__throttle_swap,
	[PERF_RECORD_UNTHROTTLE]	  = perf_event__throttle_swap,
795
	[PERF_RECORD_SAMPLE]		  = perf_event__all64_swap,
796
	[PERF_RECORD_AUX]		  = perf_event__aux_swap,
797
	[PERF_RECORD_ITRACE_START]	  = perf_event__itrace_start_swap,
798
	[PERF_RECORD_LOST_SAMPLES]	  = perf_event__all64_swap,
799 800
	[PERF_RECORD_SWITCH]		  = perf_event__switch_swap,
	[PERF_RECORD_SWITCH_CPU_WIDE]	  = perf_event__switch_swap,
801
	[PERF_RECORD_HEADER_ATTR]	  = perf_event__hdr_attr_swap,
802 803 804
	[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,
806 807
	[PERF_RECORD_AUXTRACE_INFO]	  = perf_event__auxtrace_info_swap,
	[PERF_RECORD_AUXTRACE]		  = perf_event__auxtrace_swap,
808
	[PERF_RECORD_AUXTRACE_ERROR]	  = perf_event__auxtrace_error_swap,
809
	[PERF_RECORD_THREAD_MAP]	  = perf_event__thread_map_swap,
810
	[PERF_RECORD_CPU_MAP]		  = perf_event__cpu_map_swap,
811
	[PERF_RECORD_STAT_CONFIG]	  = perf_event__stat_config_swap,
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	[PERF_RECORD_STAT]		  = perf_event__stat_swap,
813
	[PERF_RECORD_STAT_ROUND]	  = perf_event__stat_round_swap,
814
	[PERF_RECORD_EVENT_UPDATE]	  = perf_event__event_update_swap,
815
	[PERF_RECORD_TIME_CONV]		  = perf_event__all64_swap,
816
	[PERF_RECORD_HEADER_MAX]	  = NULL,
817 818
};

819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857
/*
 * 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...
 */
858
static int process_finished_round(struct perf_tool *tool __maybe_unused,
859
				  union perf_event *event __maybe_unused,
860
				  struct ordered_events *oe)
861
{
862 863
	if (dump_trace)
		fprintf(stdout, "\n");
864
	return ordered_events__flush(oe, OE_FLUSH__ROUND);
865 866
}

867 868
int perf_session__queue_event(struct perf_session *s, union perf_event *event,
			      struct perf_sample *sample, u64 file_offset)
869
{
870
	return ordered_events__queue(&s->ordered_events, event, sample, file_offset);
871
}
872

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static void callchain__lbr_callstack_printf(struct perf_sample *sample)
874
{
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875 876 877
	struct ip_callchain *callchain = sample->callchain;
	struct branch_stack *lbr_stack = sample->branch_stack;
	u64 kernel_callchain_nr = callchain->nr;
878
	unsigned int i;
879

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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;

926
	if (perf_evsel__has_branch_callstack(evsel))
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		callchain__lbr_callstack_printf(sample);

	printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
930

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931
	for (i = 0; i < callchain->nr; i++)
932
		printf("..... %2d: %016" PRIx64 "\n",
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		       i, callchain->ips[i]);
934 935
}

936 937 938 939 940 941
static void branch_stack__printf(struct perf_sample *sample)
{
	uint64_t i;

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

942 943 944 945 946
	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,
947
			(unsigned short)e->flags.cycles,
948 949 950 951 952 953
			e->flags.mispred ? "M" : " ",
			e->flags.predicted ? "P" : " ",
			e->flags.abort ? "A" : " ",
			e->flags.in_tx ? "T" : " ",
			(unsigned)e->flags.reserved);
	}
954 955
}

956 957 958 959 960 961 962 963 964 965 966 967
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);
	}
}

968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993
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);
}

994
static void regs_user__printf(struct perf_sample *sample)
995 996 997
{
	struct regs_dump *user_regs = &sample->user_regs;

998 999 1000 1001 1002 1003 1004 1005 1006 1007
	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);
1008 1009 1010 1011 1012 1013 1014 1015
}

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

1016
static void perf_evlist__print_tstamp(struct perf_evlist *evlist,
1017
				       union perf_event *event,
1018
				       struct perf_sample *sample)
1019
{
1020
	u64 sample_type = __perf_evlist__combined_sample_type(evlist);
1021

1022
	if (event->header.type != PERF_RECORD_SAMPLE &&
1023
	    !perf_evlist__sample_id_all(evlist)) {
1024 1025 1026 1027
		fputs("-1 -1 ", stdout);
		return;
	}

1028
	if ((sample_type & PERF_SAMPLE_CPU))
1029 1030
		printf("%u ", sample->cpu);

1031
	if (sample_type & PERF_SAMPLE_TIME)
1032
		printf("%" PRIu64 " ", sample->time);
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
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);
}

1065
static void dump_event(struct perf_evlist *evlist, union perf_event *event,
1066
		       u64 file_offset, struct perf_sample *sample)
1067 1068 1069 1070
{
	if (!dump_trace)
		return;

1071 1072
	printf("\n%#" PRIx64 " [%#x]: event: %d\n",
	       file_offset, event->header.size, event->header.type);
1073 1074 1075 1076

	trace_event(event);

	if (sample)
1077
		perf_evlist__print_tstamp(evlist, event, sample);
1078

1079
	printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1080
	       event->header.size, perf_event__name(event->header.type));
1081 1082
}

1083
static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
1084
			struct perf_sample *sample)
1085
{
1086 1087
	u64 sample_type;

1088 1089 1090
	if (!dump_trace)
		return;

1091
	printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1092
	       event->header.misc, sample->pid, sample->tid, sample->ip,
1093
	       sample->period, sample->addr);
1094

1095
	sample_type = evsel->attr.sample_type;
1096 1097

	if (sample_type & PERF_SAMPLE_CALLCHAIN)
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		callchain__printf(evsel, sample);
1099

1100
	if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !perf_evsel__has_branch_callstack(evsel))
1101
		branch_stack__printf(sample);
1102 1103

	if (sample_type & PERF_SAMPLE_REGS_USER)
1104
		regs_user__printf(sample);
1105

1106 1107 1108
	if (sample_type & PERF_SAMPLE_REGS_INTR)
		regs_intr__printf(sample);

1109 1110
	if (sample_type & PERF_SAMPLE_STACK_USER)
		stack_user__printf(&sample->user_stack);
1111 1112 1113

	if (sample_type & PERF_SAMPLE_WEIGHT)
		printf("... weight: %" PRIu64 "\n", sample->weight);
1114 1115 1116

	if (sample_type & PERF_SAMPLE_DATA_SRC)
		printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1117

1118 1119 1120
	if (sample_type & PERF_SAMPLE_TRANSACTION)
		printf("... transaction: %" PRIx64 "\n", sample->transaction);

1121 1122
	if (sample_type & PERF_SAMPLE_READ)
		sample_read__printf(sample, evsel->attr.read_format);
1123 1124
}

1125
static struct machine *machines__find_for_cpumode(struct machines *machines,
1126 1127
					       union perf_event *event,
					       struct perf_sample *sample)
1128
{
1129
	struct machine *machine;
1130

1131
	if (perf_guest &&
1132 1133
	    ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
	     (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1134 1135
		u32 pid;

1136 1137
		if (event->header.type == PERF_RECORD_MMAP
		    || event->header.type == PERF_RECORD_MMAP2)
1138 1139
			pid = event->mmap.pid;
		else
1140
			pid = sample->pid;
1141

1142
		machine = machines__find(machines, pid);
1143
		if (!machine)
1144
			machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
1145
		return machine;
1146
	}
1147

1148
	return &machines->host;
1149 1150
}

1151
static int deliver_sample_value(struct perf_evlist *evlist,
1152 1153 1154 1155 1156 1157
				struct perf_tool *tool,
				union perf_event *event,
				struct perf_sample *sample,
				struct sample_read_value *v,
				struct machine *machine)
{
1158
	struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1159 1160 1161 1162 1163 1164 1165 1166

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

	if (!sid || sid->evsel == NULL) {
1167
		++evlist->stats.nr_unknown_id;
1168 1169 1170 1171 1172 1173
		return 0;
	}

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

1174
static int deliver_sample_group(struct perf_evlist *evlist,
1175 1176 1177 1178 1179 1180 1181 1182 1183
				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++) {
1184
		ret = deliver_sample_value(evlist, tool, event, sample,
1185 1186 1187 1188 1189 1190 1191 1192 1193 1194
					   &sample->read.group.values[i],
					   machine);
		if (ret)
			break;
	}

	return ret;
}

static int
1195
 perf_evlist__deliver_sample(struct perf_evlist *evlist,
1196 1197 1198 1199 1200 1201 1202 1203 1204 1205
			     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;

1206
	/* Standard sample delivery. */
1207 1208 1209 1210 1211
	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)
1212
		return deliver_sample_group(evlist, tool, event, sample,
1213 1214
					    machine);
	else
1215
		return deliver_sample_value(evlist, tool, event, sample,
1216 1217 1218
					    &sample->read.one, machine);
}

1219 1220 1221 1222 1223
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)
1224
{
1225
	struct perf_evsel *evsel;
1226
	struct machine *machine;
1227

1228
	dump_event(evlist, event, file_offset, sample);
1229

1230
	evsel = perf_evlist__id2evsel(evlist, sample->id);
1231

1232
	machine = machines__find_for_cpumode(machines, event, sample);
1233

1234 1235
	switch (event->header.type) {
	case PERF_RECORD_SAMPLE:
1236
		if (evsel == NULL) {
1237
			++evlist->stats.nr_unknown_id;
1238
			return 0;
1239
		}
1240
		dump_sample(evsel, event, sample);
1241
		if (machine == NULL) {
1242
			++evlist->stats.nr_unprocessable_samples;
1243
			return 0;
1244
		}
1245
		return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1246
	case PERF_RECORD_MMAP:
1247
		return tool->mmap(tool, event, sample, machine);
1248
	case PERF_RECORD_MMAP2:
1249 1250
		if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
			++evlist->stats.nr_proc_map_timeout;
1251
		return tool->mmap2(tool, event, sample, machine);
1252
	case PERF_RECORD_COMM:
1253
		return tool->comm(tool, event, sample, machine);
1254 1255
	case PERF_RECORD_NAMESPACES:
		return tool->namespaces(tool, event, sample, machine);
1256
	case PERF_RECORD_FORK:
1257
		return tool->fork(tool, event, sample, machine);
1258
	case PERF_RECORD_EXIT:
1259
		return tool->exit(tool, event, sample, machine);
1260
	case PERF_RECORD_LOST:
1261
		if (tool->lost == perf_event__process_lost)
1262
			evlist->stats.total_lost += event->lost.lost;
1263
		return tool->lost(tool, event, sample, machine);
1264 1265 1266 1267
	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);
1268
	case PERF_RECORD_READ:
1269
		return tool->read(tool, event, sample, evsel, machine);
1270
	case PERF_RECORD_THROTTLE:
1271
		return tool->throttle(tool, event, sample, machine);
1272
	case PERF_RECORD_UNTHROTTLE:
1273
		return tool->unthrottle(tool, event, sample, machine);
1274
	case PERF_RECORD_AUX:
1275 1276 1277 1278 1279 1280
		if (tool->aux == perf_event__process_aux) {
			if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
				evlist->stats.total_aux_lost += 1;
			if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
				evlist->stats.total_aux_partial += 1;
		}
1281
		return tool->aux(tool, event, sample, machine);
1282 1283
	case PERF_RECORD_ITRACE_START:
		return tool->itrace_start(tool, event, sample, machine);
1284 1285 1286
	case PERF_RECORD_SWITCH:
	case PERF_RECORD_SWITCH_CPU_WIDE:
		return tool->context_switch(tool, event, sample, machine);
1287
	default:
1288
		++evlist->stats.nr_unknown_events;
1289 1290 1291 1292
		return -1;
	}
}

1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310
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);
}

1311 1312 1313
static s64 perf_session__process_user_event(struct perf_session *session,
					    union perf_event *event,
					    u64 file_offset)
1314
{
1315
	struct ordered_events *oe = &session->ordered_events;
1316
	struct perf_tool *tool = session->tool;
1317
	int fd = perf_data_file__fd(session->file);
1318 1319
	int err;

1320
	dump_event(session->evlist, event, file_offset, NULL);
1321

1322
	/* These events are processed right away */
1323
	switch (event->header.type) {
1324
	case PERF_RECORD_HEADER_ATTR:
1325
		err = tool->attr(tool, event, &session->evlist);
1326
		if (err == 0) {
1327
			perf_session__set_id_hdr_size(session);
1328 1329
			perf_session__set_comm_exec(session);
		}
1330
		return err;
1331 1332
	case PERF_RECORD_EVENT_UPDATE:
		return tool->event_update(tool, event, &session->evlist);
1333 1334 1335 1336 1337 1338
	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;
1339 1340
	case PERF_RECORD_HEADER_TRACING_DATA:
		/* setup for reading amidst mmap */
1341
		lseek(fd, file_offset, SEEK_SET);
1342
		return tool->tracing_data(tool, event, session);
1343
	case PERF_RECORD_HEADER_BUILD_ID:
1344
		return tool->build_id(tool, event, session);
1345
	case PERF_RECORD_FINISHED_ROUND:
1346
		return tool->finished_round(tool, event, oe);
A
Adrian Hunter 已提交
1347 1348
	case PERF_RECORD_ID_INDEX:
		return tool->id_index(tool, event, session);
1349 1350 1351 1352 1353 1354
	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);
1355
	case PERF_RECORD_AUXTRACE_ERROR:
1356
		perf_session__auxtrace_error_inc(session, event);
1357
		return tool->auxtrace_error(tool, event, session);
1358 1359
	case PERF_RECORD_THREAD_MAP:
		return tool->thread_map(tool, event, session);
1360 1361
	case PERF_RECORD_CPU_MAP:
		return tool->cpu_map(tool, event, session);
1362 1363
	case PERF_RECORD_STAT_CONFIG:
		return tool->stat_config(tool, event, session);
J
Jiri Olsa 已提交
1364 1365
	case PERF_RECORD_STAT:
		return tool->stat(tool, event, session);
1366 1367
	case PERF_RECORD_STAT_ROUND:
		return tool->stat_round(tool, event, session);
1368 1369 1370
	case PERF_RECORD_TIME_CONV:
		session->time_conv = event->time_conv;
		return tool->time_conv(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 1517 1518
	if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) {
		pr_err("problem inserting idle task.\n");
		err = -1;
	}

1519 1520 1521
	/* machine__findnew_thread() got the thread, so put it */
	thread__put(thread);
	return err;
1522 1523
}

1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541
static void
perf_session__warn_order(const struct perf_session *session)
{
	const struct ordered_events *oe = &session->ordered_events;
	struct perf_evsel *evsel;
	bool should_warn = true;

	evlist__for_each_entry(session->evlist, evsel) {
		if (evsel->attr.write_backward)
			should_warn = false;
	}

	if (!should_warn)
		return;
	if (oe->nr_unordered_events != 0)
		ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
}

1542
static void perf_session__warn_about_errors(const struct perf_session *session)
1543
{
1544 1545 1546
	const struct events_stats *stats = &session->evlist->stats;

	if (session->tool->lost == perf_event__process_lost &&
1547
	    stats->nr_events[PERF_RECORD_LOST] != 0) {
1548 1549
		ui__warning("Processed %d events and lost %d chunks!\n\n"
			    "Check IO/CPU overload!\n\n",
1550 1551
			    stats->nr_events[0],
			    stats->nr_events[PERF_RECORD_LOST]);
1552 1553
	}

1554 1555 1556 1557 1558 1559
	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) {
1560
			ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n",
1561 1562 1563 1564 1565
				    stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
				    drop_rate * 100.0);
		}
	}

1566 1567 1568 1569 1570 1571 1572
	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]);
	}

1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589
	if (session->tool->aux == perf_event__process_aux &&
	    stats->total_aux_partial != 0) {
		bool vmm_exclusive = false;

		(void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
		                       &vmm_exclusive);

		ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
		            "Are you running a KVM guest in the background?%s\n\n",
			    stats->total_aux_partial,
			    stats->nr_events[PERF_RECORD_AUX],
			    vmm_exclusive ?
			    "\nReloading kvm_intel module with vmm_exclusive=0\n"
			    "will reduce the gaps to only guest's timeslices." :
			    "");
	}

1590
	if (stats->nr_unknown_events != 0) {
1591 1592 1593 1594 1595
		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",
1596
			    stats->nr_unknown_events);
1597 1598
	}

1599
	if (stats->nr_unknown_id != 0) {
1600
		ui__warning("%u samples with id not present in the header\n",
1601
			    stats->nr_unknown_id);
1602 1603
	}

1604
	if (stats->nr_invalid_chains != 0) {
1605 1606 1607
		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",
1608 1609
			    stats->nr_invalid_chains,
			    stats->nr_events[PERF_RECORD_SAMPLE]);
1610
	}
1611

1612
	if (stats->nr_unprocessable_samples != 0) {
1613 1614
		ui__warning("%u unprocessable samples recorded.\n"
			    "Do you have a KVM guest running and not using 'perf kvm'?\n",
1615
			    stats->nr_unprocessable_samples);
1616
	}
1617

1618
	perf_session__warn_order(session);
1619 1620

	events_stats__auxtrace_error_warn(stats);
1621 1622 1623 1624 1625 1626

	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"
1627 1628 1629
			    "to a file.\n"
			    "The time limit to process proc map is too short?\n"
			    "Increase it by --proc-map-timeout\n",
1630 1631
			    stats->nr_proc_map_timeout);
	}
1632 1633
}

1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646
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);
}

1647 1648
volatile int session_done;

1649
static int __perf_session__process_pipe_events(struct perf_session *session)
1650
{
1651
	struct ordered_events *oe = &session->ordered_events;
1652
	struct perf_tool *tool = session->tool;
1653
	int fd = perf_data_file__fd(session->file);
1654 1655 1656
	union perf_event *event;
	uint32_t size, cur_size = 0;
	void *buf = NULL;
1657
	s64 skip = 0;
1658
	u64 head;
1659
	ssize_t err;
1660 1661
	void *p;

1662
	perf_tool__fill_defaults(tool);
1663 1664

	head = 0;
1665 1666 1667 1668 1669
	cur_size = sizeof(union perf_event);

	buf = malloc(cur_size);
	if (!buf)
		return -errno;
1670
	ordered_events__set_copy_on_queue(oe, true);
1671
more:
1672
	event = buf;
1673
	err = readn(fd, event, sizeof(struct perf_event_header));
1674 1675 1676 1677 1678 1679 1680 1681
	if (err <= 0) {
		if (err == 0)
			goto done;

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

1682
	if (session->header.needs_swap)
1683
		perf_event_header__bswap(&event->header);
1684

1685
	size = event->header.size;
1686 1687 1688 1689
	if (size < sizeof(struct perf_event_header)) {
		pr_err("bad event header size\n");
		goto out_err;
	}
1690

1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701
	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;
1702 1703
	p += sizeof(struct perf_event_header);

1704
	if (size - sizeof(struct perf_event_header)) {
1705
		err = readn(fd, p, size - sizeof(struct perf_event_header));
1706 1707 1708 1709 1710
		if (err <= 0) {
			if (err == 0) {
				pr_err("unexpected end of event stream\n");
				goto done;
			}
1711

1712 1713 1714
			pr_err("failed to read event data\n");
			goto out_err;
		}
1715 1716
	}

1717
	if ((skip = perf_session__process_event(session, event, head)) < 0) {
1718
		pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1719
		       head, event->header.size, event->header.type);
1720 1721
		err = -EINVAL;
		goto out_err;
1722 1723 1724 1725 1726 1727 1728 1729 1730 1731
	}

	head += size;

	if (skip > 0)
		head += skip;

	if (!session_done())
		goto more;
done:
1732
	/* do the final flush for ordered samples */
1733
	err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1734 1735 1736
	if (err)
		goto out_err;
	err = auxtrace__flush_events(session, tool);
1737 1738 1739
	if (err)
		goto out_err;
	err = perf_session__flush_thread_stacks(session);
1740
out_err:
1741
	free(buf);
1742
	perf_session__warn_about_errors(session);
1743
	ordered_events__free(&session->ordered_events);
1744
	auxtrace__free_events(session);
1745 1746 1747
	return err;
}

1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765
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);

1766 1767 1768 1769
	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);
1770
		return NULL;
1771
	}
1772 1773 1774 1775

	return event;
}

1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787
/*
 * 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

1788 1789
static int __perf_session__process_events(struct perf_session *session,
					  u64 data_offset, u64 data_size,
1790
					  u64 file_size)
1791
{
1792
	struct ordered_events *oe = &session->ordered_events;
1793
	struct perf_tool *tool = session->tool;
1794
	int fd = perf_data_file__fd(session->file);
1795
	u64 head, page_offset, file_offset, file_pos, size;
1796
	int err, mmap_prot, mmap_flags, map_idx = 0;
1797
	size_t	mmap_size;
1798
	char *buf, *mmaps[NUM_MMAPS];
1799
	union perf_event *event;
1800
	struct ui_progress prog;
1801
	s64 skip;
1802

1803
	perf_tool__fill_defaults(tool);
1804

1805 1806 1807
	page_offset = page_size * (data_offset / page_size);
	file_offset = page_offset;
	head = data_offset - page_offset;
1808

1809 1810 1811 1812
	if (data_size == 0)
		goto out;

	if (data_offset + data_size < file_size)
1813 1814
		file_size = data_offset + data_size;

1815
	ui_progress__init(&prog, file_size, "Processing events...");
1816

1817
	mmap_size = MMAP_SIZE;
1818
	if (mmap_size > file_size) {
1819
		mmap_size = file_size;
1820 1821
		session->one_mmap = true;
	}
1822

1823 1824
	memset(mmaps, 0, sizeof(mmaps));

1825 1826 1827
	mmap_prot  = PROT_READ;
	mmap_flags = MAP_SHARED;

1828
	if (session->header.needs_swap) {
1829 1830 1831
		mmap_prot  |= PROT_WRITE;
		mmap_flags = MAP_PRIVATE;
	}
1832
remap:
1833
	buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1834
		   file_offset);
1835 1836 1837 1838 1839
	if (buf == MAP_FAILED) {
		pr_err("failed to mmap file\n");
		err = -errno;
		goto out_err;
	}
1840 1841
	mmaps[map_idx] = buf;
	map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1842
	file_pos = file_offset + head;
1843 1844 1845 1846
	if (session->one_mmap) {
		session->one_mmap_addr = buf;
		session->one_mmap_offset = file_offset;
	}
1847 1848

more:
1849 1850
	event = fetch_mmaped_event(session, head, mmap_size, buf);
	if (!event) {
1851 1852 1853 1854
		if (mmaps[map_idx]) {
			munmap(mmaps[map_idx], mmap_size);
			mmaps[map_idx] = NULL;
		}
1855

1856 1857 1858
		page_offset = page_size * (head / page_size);
		file_offset += page_offset;
		head -= page_offset;
1859 1860 1861 1862 1863
		goto remap;
	}

	size = event->header.size;

1864
	if (size < sizeof(struct perf_event_header) ||
1865
	    (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1866 1867 1868 1869 1870
		pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
		       file_offset + head, event->header.size,
		       event->header.type);
		err = -EINVAL;
		goto out_err;
1871 1872
	}

1873 1874 1875
	if (skip)
		size += skip;

1876
	head += size;
1877
	file_pos += size;
1878

1879
	ui_progress__update(&prog, size);
1880

1881
	if (session_done())
1882
		goto out;
1883

1884
	if (file_pos < file_size)
1885
		goto more;
1886

1887
out:
1888
	/* do the final flush for ordered samples */
1889
	err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1890 1891 1892
	if (err)
		goto out_err;
	err = auxtrace__flush_events(session, tool);
1893 1894 1895
	if (err)
		goto out_err;
	err = perf_session__flush_thread_stacks(session);
1896
out_err:
N
Namhyung Kim 已提交
1897
	ui_progress__finish();
1898
	perf_session__warn_about_errors(session);
1899 1900 1901 1902 1903
	/*
	 * We may switching perf.data output, make ordered_events
	 * reusable.
	 */
	ordered_events__reinit(&session->ordered_events);
1904
	auxtrace__free_events(session);
1905
	session->one_mmap = false;
1906 1907
	return err;
}
1908

1909
int perf_session__process_events(struct perf_session *session)
1910
{
1911
	u64 size = perf_data_file__size(session->file);
1912 1913
	int err;

1914
	if (perf_session__register_idle_thread(session) < 0)
1915 1916
		return -ENOMEM;

1917 1918 1919
	if (!perf_data_file__is_pipe(session->file))
		err = __perf_session__process_events(session,
						     session->header.data_offset,
1920
						     session->header.data_size, size);
1921
	else
1922
		err = __perf_session__process_pipe_events(session);
1923

1924 1925 1926
	return err;
}

1927
bool perf_session__has_traces(struct perf_session *session, const char *msg)
1928
{
1929 1930
	struct perf_evsel *evsel;

1931
	evlist__for_each_entry(session->evlist, evsel) {
1932 1933
		if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
			return true;
1934 1935
	}

1936 1937
	pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
	return false;
1938
}
1939

1940 1941
int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
				     const char *symbol_name, u64 addr)
1942 1943
{
	char *bracket;
1944
	int i;
1945 1946 1947 1948 1949
	struct ref_reloc_sym *ref;

	ref = zalloc(sizeof(struct ref_reloc_sym));
	if (ref == NULL)
		return -ENOMEM;
1950

1951 1952 1953
	ref->name = strdup(symbol_name);
	if (ref->name == NULL) {
		free(ref);
1954
		return -ENOMEM;
1955
	}
1956

1957
	bracket = strchr(ref->name, ']');
1958 1959 1960
	if (bracket)
		*bracket = '\0';

1961
	ref->addr = addr;
1962 1963

	for (i = 0; i < MAP__NR_TYPES; ++i) {
1964
		struct kmap *kmap = map__kmap(maps[i]);
1965 1966 1967

		if (!kmap)
			continue;
1968
		kmap->ref_reloc_sym = ref;
1969 1970
	}

1971 1972
	return 0;
}
1973

1974
size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1975
{
1976
	return machines__fprintf_dsos(&session->machines, fp);
1977
}
1978

1979
size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1980
					  bool (skip)(struct dso *dso, int parm), int parm)
1981
{
1982
	return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1983
}
1984 1985 1986

size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
{
1987 1988 1989 1990 1991 1992
	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)";

1993
	ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
1994

1995
	ret += events_stats__fprintf(&session->evlist->stats, fp);
1996 1997
	return ret;
}
1998

1999 2000 2001 2002 2003 2004
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...
	 */
2005
	return machine__fprintf(&session->machines.host, fp);
2006 2007
}

2008 2009 2010 2011 2012
struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
					      unsigned int type)
{
	struct perf_evsel *pos;

2013
	evlist__for_each_entry(session->evlist, pos) {
2014 2015 2016 2017 2018 2019
		if (pos->attr.type == type)
			return pos;
	}
	return NULL;
}

2020 2021 2022
int perf_session__cpu_bitmap(struct perf_session *session,
			     const char *cpu_list, unsigned long *cpu_bitmap)
{
2023
	int i, err = -1;
2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040
	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);
2041 2042 2043 2044
	if (map == NULL) {
		pr_err("Invalid cpu_list\n");
		return -1;
	}
2045 2046 2047 2048 2049 2050 2051

	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);
2052
			goto out_delete_map;
2053 2054 2055 2056 2057
		}

		set_bit(cpu, cpu_bitmap);
	}

2058 2059 2060
	err = 0;

out_delete_map:
2061
	cpu_map__put(map);
2062
	return err;
2063
}
2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074

void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
				bool full)
{
	if (session == NULL || fp == NULL)
		return;

	fprintf(fp, "# ========\n");
	perf_header__fprintf_info(session, fp, full);
	fprintf(fp, "# ========\n#\n");
}
2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085


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++) {
2086 2087 2088 2089 2090
		/*
		 * 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);
2091
		if (evsel == NULL)
2092
			continue;
2093 2094

		err = -EEXIST;
2095
		if (evsel->handler != NULL)
2096
			goto out;
2097
		evsel->handler = assocs[i].handler;
2098 2099 2100 2101 2102 2103
	}

	err = 0;
out:
	return err;
}
A
Adrian Hunter 已提交
2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157

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);

2158
	evlist__for_each_entry(evlist, evsel)
A
Adrian Hunter 已提交
2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170
		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;

2171
	evlist__for_each_entry(evlist, evsel) {
A
Adrian Hunter 已提交
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
		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;
}