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Subject[PATCH 10/44] perf auxtrace: Add helpers for AUX area tracing errors
Date
Add functions to synthesize, count and print
AUX area tracing error events.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
tools/perf/util/auxtrace.c | 81 ++++++++++++++++++++++++++++++++++++++++++++++
tools/perf/util/auxtrace.h | 14 ++++++++
tools/perf/util/event.h | 6 ++++
tools/perf/util/session.c | 3 ++
4 files changed, 104 insertions(+)

diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c
index 1bec3e6..9073fe2 100644
--- a/tools/perf/util/auxtrace.c
+++ b/tools/perf/util/auxtrace.c
@@ -24,6 +24,7 @@
#include <linux/log2.h>

#include <stdlib.h>
+#include <stdio.h>
#include <string.h>
#include <errno.h>

@@ -36,6 +37,7 @@
#include "auxtrace.h"

#include "event.h"
+#include "session.h"
#include "debug.h"
#include "parse-options.h"

@@ -172,6 +174,28 @@ auxtrace_record__init(struct perf_evlist *evlist __maybe_unused, int *err)
return NULL;
}

+void auxtrace_synth_error(struct auxtrace_error_event *auxtrace_error, int type,
+ int code, int cpu, pid_t pid, pid_t tid, u64 ip,
+ const char *msg)
+{
+ size_t size;
+
+ memset(auxtrace_error, 0, sizeof(struct auxtrace_error_event));
+
+ auxtrace_error->header.type = PERF_RECORD_AUXTRACE_ERROR;
+ auxtrace_error->type = type;
+ auxtrace_error->code = code;
+ auxtrace_error->cpu = cpu;
+ auxtrace_error->pid = pid;
+ auxtrace_error->tid = tid;
+ auxtrace_error->ip = ip;
+ strlcpy(auxtrace_error->msg, msg, MAX_AUXTRACE_ERROR_MSG);
+
+ size = (void *)auxtrace_error->msg - (void *)auxtrace_error +
+ strlen(auxtrace_error->msg) + 1;
+ auxtrace_error->header.size = PERF_ALIGN(size, sizeof(u64));
+}
+
int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr,
struct perf_tool *tool,
struct perf_session *session,
@@ -331,6 +355,63 @@ out_err:
return -EINVAL;
}

+static const char * const auxtrace_error_type_name[] = {
+ [PERF_AUXTRACE_ERROR_ITRACE] = "instruction trace",
+};
+
+static const char *auxtrace_error_name(int type)
+{
+ const char *error_type_name = NULL;
+
+ if (type < PERF_AUXTRACE_ERROR_MAX)
+ error_type_name = auxtrace_error_type_name[type];
+ if (!error_type_name)
+ error_type_name = "unknown AUX";
+ return error_type_name;
+}
+
+size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp)
+{
+ struct auxtrace_error_event *e = &event->auxtrace_error;
+ int ret;
+
+ ret = fprintf(fp, " %s error type %u",
+ auxtrace_error_name(e->type), e->type);
+ ret += fprintf(fp, " cpu %d pid %d tid %d ip %#"PRIx64" code %u: %s\n",
+ e->cpu, e->pid, e->tid, e->ip, e->code, e->msg);
+ return ret;
+}
+
+void perf_session__auxtrace_error_inc(struct perf_session *session,
+ union perf_event *event)
+{
+ struct auxtrace_error_event *e = &event->auxtrace_error;
+
+ if (e->type < PERF_AUXTRACE_ERROR_MAX)
+ session->evlist->stats.nr_auxtrace_errors[e->type] += 1;
+}
+
+void events_stats__auxtrace_error_warn(const struct events_stats *stats)
+{
+ int i;
+
+ for (i = 0; i < PERF_AUXTRACE_ERROR_MAX; i++) {
+ if (!stats->nr_auxtrace_errors[i])
+ continue;
+ ui__warning("%u %s errors\n",
+ stats->nr_auxtrace_errors[i],
+ auxtrace_error_name(i));
+ }
+}
+
+int perf_event__process_auxtrace_error(struct perf_tool *tool __maybe_unused,
+ union perf_event *event,
+ struct perf_session *session __maybe_unused)
+{
+ perf_event__fprintf_auxtrace_error(event, stdout);
+ return 0;
+}
+
int auxtrace_mmap__read(struct auxtrace_mmap *mm, struct auxtrace_record *itr,
struct perf_tool *tool, process_auxtrace_t fn)
{
diff --git a/tools/perf/util/auxtrace.h b/tools/perf/util/auxtrace.h
index 6355315..bcfb928 100644
--- a/tools/perf/util/auxtrace.h
+++ b/tools/perf/util/auxtrace.h
@@ -23,6 +23,7 @@
#include <linux/types.h>

#include "../perf.h"
+#include "event.h"
#include "session.h"

union perf_event;
@@ -32,6 +33,7 @@ struct perf_tool;
struct option;
struct record_opts;
struct auxtrace_info_event;
+struct events_stats;

enum itrace_period_type {
PERF_ITRACE_PERIOD_INSTRUCTIONS,
@@ -222,14 +224,26 @@ int auxtrace_record__info_fill(struct auxtrace_record *itr,
void auxtrace_record__free(struct auxtrace_record *itr);
u64 auxtrace_record__reference(struct auxtrace_record *itr);

+void auxtrace_synth_error(struct auxtrace_error_event *auxtrace_error, int type,
+ int code, int cpu, pid_t pid, pid_t tid, u64 ip,
+ const char *msg);
+
int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr,
struct perf_tool *tool,
struct perf_session *session,
perf_event__handler_t process);
+int perf_event__process_auxtrace_error(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_session *session);
int itrace_parse_synth_opts(const struct option *opt, const char *str,
int unset);
void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts);

+size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp);
+void perf_session__auxtrace_error_inc(struct perf_session *session,
+ union perf_event *event);
+void events_stats__auxtrace_error_warn(const struct events_stats *stats);
+
static inline int auxtrace__process_event(struct perf_session *session,
union perf_event *event,
struct perf_sample *sample,
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 657dcfa..8ef3725 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -221,6 +221,11 @@ enum perf_user_event_type { /* above any possible kernel type */
PERF_RECORD_HEADER_MAX
};

+enum auxtrace_error_type {
+ PERF_AUXTRACE_ERROR_ITRACE = 1,
+ PERF_AUXTRACE_ERROR_MAX
+};
+
/*
* The kernel collects the number of events it couldn't send in a stretch and
* when possible sends this number in a PERF_RECORD_LOST event. The number of
@@ -245,6 +250,7 @@ struct events_stats {
u32 nr_invalid_chains;
u32 nr_unknown_id;
u32 nr_unprocessable_samples;
+ u32 nr_auxtrace_errors[PERF_AUXTRACE_ERROR_MAX];
};

struct attr_event {
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index cf9d678..b08bf15 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1093,6 +1093,7 @@ static s64 perf_session__process_user_event(struct perf_session *session,
lseek(fd, file_offset + event->header.size, SEEK_SET);
return tool->auxtrace(tool, event, session);
case PERF_RECORD_AUXTRACE_ERROR:
+ perf_session__auxtrace_error_inc(session, event);
return tool->auxtrace_error(tool, event, session);
default:
return -EINVAL;
@@ -1282,6 +1283,8 @@ static void perf_session__warn_about_errors(const struct perf_session *session)

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

volatile int session_done;
--
1.9.1


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