perf annotate: Move locking to struct annotation

Since we'll need it when implementing the live annotate TUI browser.

This also simplifies things a bit by having the list head for the source
code to be in the dynamicly allocated part of struct annotation, that
way we don't have to pass it around, it can be found from the struct
symbol that is passed everywhere.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 34 insertions, 33 deletions

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index b790673cb0a..7dbf22d096b 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -139,7 +139,7 @@ static void sig_winch_handler(int sig __used)
 static int parse_source(struct sym_entry *syme)
 {
 	struct symbol *sym;
-	struct sym_entry_source *source;
+	struct annotation *notes;
 	struct map *map;
 	int err = -1;
 
@@ -152,39 +152,35 @@ static int parse_source(struct sym_entry *syme)
 	/*
 	 * We can't annotate with just /proc/kallsyms
 	 */
-	if (map->dso->origin == DSO__ORIG_KERNEL)
+	if (map->dso->origin == DSO__ORIG_KERNEL) {
+		pr_err("Can't annotate %s: No vmlinux file was found in the "
+		       "path\n", sym->name);
+		sleep(1);
 		return -1;
-
-	if (syme->src == NULL) {
-		syme->src = zalloc(sizeof(*source));
-		if (syme->src == NULL)
-			return -1;
-		pthread_mutex_init(&syme->src->lock, NULL);
-		INIT_LIST_HEAD(&syme->src->head);
 	}
 
-	source = syme->src;
-
-	if (symbol__annotation(sym)->histograms != NULL) {
-		pthread_mutex_lock(&source->lock);
+	notes = symbol__annotation(sym);
+	if (notes->src != NULL) {
+		pthread_mutex_lock(&notes->lock);
 		goto out_assign;
 	}
 
-	pthread_mutex_lock(&source->lock);
+	pthread_mutex_lock(&notes->lock);
 
 	if (symbol__alloc_hist(sym, top.evlist->nr_entries) < 0) {
 		pr_err("Not enough memory for annotating '%s' symbol!\n",
 		       sym->name);
+		sleep(1);
 		goto out_unlock;
 	}
 
-	err = symbol__annotate(sym, syme->map, &source->head, 0);
+	err = symbol__annotate(sym, syme->map, 0);
 	if (err == 0) {
 out_assign:
 	sym_filter_entry = syme;
 	}
 out_unlock:
-	pthread_mutex_unlock(&source->lock);
+	pthread_mutex_unlock(&notes->lock);
 	return err;
 }
 
@@ -196,20 +192,27 @@ static void __zero_source_counters(struct sym_entry *syme)
 
 static void record_precise_ip(struct sym_entry *syme, int counter, u64 ip)
 {
+	struct annotation *notes;
+	struct symbol *sym;
+
 	if (syme != sym_filter_entry)
 		return;
 
-	if (pthread_mutex_trylock(&syme->src->lock))
+	sym = sym_entry__symbol(syme);
+	notes = symbol__annotation(sym);
+
+	if (pthread_mutex_trylock(&notes->lock))
 		return;
 
 	ip = syme->map->map_ip(syme->map, ip);
-	symbol__inc_addr_samples(sym_entry__symbol(syme), syme->map, counter, ip);
+	symbol__inc_addr_samples(sym, syme->map, counter, ip);
 
-	pthread_mutex_unlock(&syme->src->lock);
+	pthread_mutex_unlock(&notes->lock);
 }
 
 static void show_details(struct sym_entry *syme)
 {
+	struct annotation *notes;
 	struct symbol *symbol;
 	int more;
 
@@ -217,24 +220,26 @@ static void show_details(struct sym_entry *syme)
 		return;
 
 	symbol = sym_entry__symbol(syme);
-	if (!syme->src || symbol__annotation(symbol)->histograms == NULL)
-		return;
+	notes = symbol__annotation(symbol);
+
+	pthread_mutex_lock(&notes->lock);
+
+	if (notes->src == NULL)
+		goto out_unlock;
 
 	printf("Showing %s for %s\n", event_name(top.sym_evsel), symbol->name);
 	printf("  Events  Pcnt (>=%d%%)\n", sym_pcnt_filter);
 
-	pthread_mutex_lock(&syme->src->lock);
-	more = symbol__annotate_printf(symbol, syme->map, &syme->src->head,
-				       top.sym_evsel->idx, 0, sym_pcnt_filter,
-				       top.print_entries);
+	more = symbol__annotate_printf(symbol, syme->map, top.sym_evsel->idx,
+				       0, sym_pcnt_filter, top.print_entries);
 	if (top.zero)
 		symbol__annotate_zero_histogram(symbol, top.sym_evsel->idx);
 	else
-		symbol__annotate_decay_histogram(symbol, &syme->src->head,
-						 top.sym_evsel->idx);
-	pthread_mutex_unlock(&syme->src->lock);
+		symbol__annotate_decay_histogram(symbol, top.sym_evsel->idx);
 	if (more != 0)
 		printf("%d lines not displayed, maybe increase display entries [e]\n", more);
+out_unlock:
+	pthread_mutex_unlock(&notes->lock);
 }
 
 static const char		CONSOLE_CLEAR[] = "";
@@ -372,10 +377,8 @@ static void prompt_symbol(struct sym_entry **target, const char *msg)
 
 	/* zero counters of active symbol */
 	if (syme) {
-		pthread_mutex_lock(&syme->src->lock);
 		__zero_source_counters(syme);
 		*target = NULL;
-		pthread_mutex_unlock(&syme->src->lock);
 	}
 
 	fprintf(stdout, "\n%s: ", msg);
@@ -554,10 +557,8 @@ static void handle_keypress(struct perf_session *session, int c)
 			else {
 				struct sym_entry *syme = sym_filter_entry;
 
-				pthread_mutex_lock(&syme->src->lock);
 				sym_filter_entry = NULL;
 				__zero_source_counters(syme);
-				pthread_mutex_unlock(&syme->src->lock);
 			}
 			break;
 		case 'U':
@@ -653,7 +654,7 @@ static int symbol_filter(struct map *map, struct symbol *sym)
 
 	syme = symbol__priv(sym);
 	syme->map = map;
-	syme->src = NULL;
+	symbol__annotate_init(map, sym);
 
 	if (!sym_filter_entry && sym_filter && !strcmp(name, sym_filter)) {
 		/* schedule initial sym_filter_entry setup */