perf annotate: Initialize the priv are in symbol__new()

We need to initializa some fields (right now just a mutex) when we
allocate the per symbol annotation struct, so do it at the symbol
constructor instead of (ab)using the filter mechanism for that.

This way we remove one of the few cases we have for that symbol filter,
which will eventually led to removing it.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-cvz34avlz1lez888lob95390@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 24 insertions, 1 deletions

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 37e8d20ae03e..863d69c45b8a 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -9,6 +9,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <inttypes.h>
+#include "annotate.h"
 #include "build-id.h"
 #include "util.h"
 #include "debug.h"
@@ -235,8 +236,13 @@ struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name)
 	if (sym == NULL)
 		return NULL;
 
-	if (symbol_conf.priv_size)
+	if (symbol_conf.priv_size) {
+		if (symbol_conf.init_annotation) {
+			struct annotation *notes = (void *)sym;
+			pthread_mutex_init(&notes->lock, NULL);
+		}
 		sym = ((void *)sym) + symbol_conf.priv_size;
+	}
 
 	sym->start   = start;
 	sym->end     = len ? start + len : start;
@@ -1948,6 +1954,23 @@ static bool symbol__read_kptr_restrict(void)
 	return value;
 }
 
+int symbol__annotation_init(void)
+{
+	if (symbol_conf.initialized) {
+		pr_err("Annotation needs to be init before symbol__init()\n");
+		return -1;
+	}
+
+	if (symbol_conf.init_annotation) {
+		pr_warning("Annotation being initialized multiple times\n");
+		return 0;
+	}
+
+	symbol_conf.priv_size += sizeof(struct annotation);
+	symbol_conf.init_annotation = true;
+	return 0;
+}
+
 int symbol__init(struct perf_env *env)
 {
 	const char *symfs;