1 files changed, 79 insertions, 16 deletions

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 21fd573106ed..04e536ae4d88 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -28,6 +28,7 @@
 #include "debug.h"
 #include "trace-event.h"
 #include "stat.h"
+#include "util/parse-branch-options.h"
 
 static struct {
 	bool sample_id_all;
@@ -708,6 +709,14 @@ static void apply_config_terms(struct perf_evsel *evsel,
 		case PERF_EVSEL__CONFIG_TERM_CALLGRAPH:
 			callgraph_buf = term->val.callgraph;
 			break;
+		case PERF_EVSEL__CONFIG_TERM_BRANCH:
+			if (term->val.branch && strcmp(term->val.branch, "no")) {
+				perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
+				parse_branch_str(term->val.branch,
+						 &attr->branch_sample_type);
+			} else
+				perf_evsel__reset_sample_bit(evsel, BRANCH_STACK);
+			break;
 		case PERF_EVSEL__CONFIG_TERM_STACK_USER:
 			dump_size = term->val.stack_user;
 			break;
@@ -981,18 +990,19 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts,
 	 * it overloads any global configuration.
 	 */
 	apply_config_terms(evsel, opts);
+
+	evsel->ignore_missing_thread = opts->ignore_missing_thread;
 }
 
 static int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
 {
-	int cpu, thread;
-
 	if (evsel->system_wide)
 		nthreads = 1;
 
 	evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
 
 	if (evsel->fd) {
+		int cpu, thread;
 		for (cpu = 0; cpu < ncpus; cpu++) {
 			for (thread = 0; thread < nthreads; thread++) {
 				FD(evsel, cpu, thread) = -1;
@@ -1045,15 +1055,15 @@ int perf_evsel__set_filter(struct perf_evsel *evsel, const char *filter)
 	return -1;
 }
 
-int perf_evsel__append_filter(struct perf_evsel *evsel,
-			      const char *op, const char *filter)
+static int perf_evsel__append_filter(struct perf_evsel *evsel,
+				     const char *fmt, const char *filter)
 {
 	char *new_filter;
 
 	if (evsel->filter == NULL)
 		return perf_evsel__set_filter(evsel, filter);
 
-	if (asprintf(&new_filter,"(%s) %s (%s)", evsel->filter, op, filter) > 0) {
+	if (asprintf(&new_filter, fmt, evsel->filter, filter) > 0) {
 		free(evsel->filter);
 		evsel->filter = new_filter;
 		return 0;
@@ -1062,6 +1072,16 @@ int perf_evsel__append_filter(struct perf_evsel *evsel,
 	return -1;
 }
 
+int perf_evsel__append_tp_filter(struct perf_evsel *evsel, const char *filter)
+{
+	return perf_evsel__append_filter(evsel, "(%s) && (%s)", filter);
+}
+
+int perf_evsel__append_addr_filter(struct perf_evsel *evsel, const char *filter)
+{
+	return perf_evsel__append_filter(evsel, "%s,%s", filter);
+}
+
 int perf_evsel__enable(struct perf_evsel *evsel)
 {
 	int nthreads = thread_map__nr(evsel->threads);
@@ -1401,6 +1421,33 @@ static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
 	return fprintf(fp, "  %-32s %s\n", name, val);
 }
 
+static bool ignore_missing_thread(struct perf_evsel *evsel,
+				  struct thread_map *threads,
+				  int thread, int err)
+{
+	if (!evsel->ignore_missing_thread)
+		return false;
+
+	/* The system wide setup does not work with threads. */
+	if (evsel->system_wide)
+		return false;
+
+	/* The -ESRCH is perf event syscall errno for pid's not found. */
+	if (err != -ESRCH)
+		return false;
+
+	/* If there's only one thread, let it fail. */
+	if (threads->nr == 1)
+		return false;
+
+	if (thread_map__remove(threads, thread))
+		return false;
+
+	pr_warning("WARNING: Ignored open failure for pid %d\n",
+		   thread_map__pid(threads, thread));
+	return true;
+}
+
 static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
 			      struct thread_map *threads)
 {
@@ -1456,29 +1503,47 @@ retry_sample_id:
 	for (cpu = 0; cpu < cpus->nr; cpu++) {
 
 		for (thread = 0; thread < nthreads; thread++) {
-			int group_fd;
+			int fd, group_fd;
 
 			if (!evsel->cgrp && !evsel->system_wide)
 				pid = thread_map__pid(threads, thread);
 
 			group_fd = get_group_fd(evsel, cpu, thread);
 retry_open:
-			pr_debug2("sys_perf_event_open: pid %d  cpu %d  group_fd %d  flags %#lx\n",
+			pr_debug2("sys_perf_event_open: pid %d  cpu %d  group_fd %d  flags %#lx",
 				  pid, cpus->map[cpu], group_fd, flags);
 
-			FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr,
-								     pid,
-								     cpus->map[cpu],
-								     group_fd, flags);
-			if (FD(evsel, cpu, thread) < 0) {
+			fd = sys_perf_event_open(&evsel->attr, pid, cpus->map[cpu],
+						 group_fd, flags);
+
+			FD(evsel, cpu, thread) = fd;
+
+			if (fd < 0) {
 				err = -errno;
-				pr_debug2("sys_perf_event_open failed, error %d\n",
+
+				if (ignore_missing_thread(evsel, threads, thread, err)) {
+					/*
+					 * We just removed 1 thread, so take a step
+					 * back on thread index and lower the upper
+					 * nthreads limit.
+					 */
+					nthreads--;
+					thread--;
+
+					/* ... and pretend like nothing have happened. */
+					err = 0;
+					continue;
+				}
+
+				pr_debug2("\nsys_perf_event_open failed, error %d\n",
 					  err);
 				goto try_fallback;
 			}
 
+			pr_debug2(" = %d\n", fd);
+
 			if (evsel->bpf_fd >= 0) {
-				int evt_fd = FD(evsel, cpu, thread);
+				int evt_fd = fd;
 				int bpf_fd = evsel->bpf_fd;
 
 				err = ioctl(evt_fd,
@@ -1728,7 +1793,6 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
 	data->cpu = data->pid = data->tid = -1;
 	data->stream_id = data->id = data->time = -1ULL;
 	data->period = evsel->attr.sample_period;
-	data->weight = 0;
 	data->cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 
 	if (event->header.type != PERF_RECORD_SAMPLE) {
@@ -1935,7 +1999,6 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
 		}
 	}
 
-	data->weight = 0;
 	if (type & PERF_SAMPLE_WEIGHT) {
 		OVERFLOW_CHECK_u64(array);
 		data->weight = *array;