[Sanitizer] Make SuppressionContext a singleton class, residing in sanitizer_common.

Convert TSan and LSan to the new interface. More changes will follow:
1) "suppressions" should become a common runtime flag.
2) Code for parsing suppressions file should be moved to SuppressionContext::Init().

llvm-svn: 214334

1 files changed, 14 insertions, 0 deletions

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_suppressions.cc b/compiler-rt/lib/sanitizer_common/sanitizer_suppressions.cc
index 87ccf7fca22..aa04ec69f02 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_suppressions.cc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_suppressions.cc
@@ -16,6 +16,7 @@
 #include "sanitizer_allocator_internal.h"
 #include "sanitizer_common.h"
 #include "sanitizer_libc.h"
+#include "sanitizer_placement_new.h"
 
 namespace __sanitizer {
 
@@ -65,6 +66,19 @@ bool TemplateMatch(char *templ, const char *str) {
   return true;
 }
 
+ALIGNED(64) static char placeholder[sizeof(SuppressionContext)];
+static SuppressionContext *suppression_ctx = 0;
+
+SuppressionContext *SuppressionContext::Get() {
+  CHECK(suppression_ctx);
+  return suppression_ctx;
+}
+
+void SuppressionContext::Init() {
+  CHECK(!suppression_ctx);
+  suppression_ctx = new(placeholder) SuppressionContext;
+}
+
 bool SuppressionContext::Match(const char *str, SuppressionType type,
                                Suppression **s) {
   can_parse_ = false;