tsan: ignore interceptors coming from specified libraries

LibIgnore allows to ignore all interceptors called from a particular set
of dynamic libraries. LibIgnore remembers all "called_from_lib" suppressions
from the provided SuppressionContext; finds code ranges for the libraries;
and checks whether the provided PC value belongs to the code ranges.

Also make malloc and friends interceptors use SCOPED_INTERCEPTOR_RAW instead of
SCOPED_TSAN_INTERCEPTOR, because if they are called from an ignored lib,
then must call our internal allocator instead of libc malloc.

llvm-svn: 191897

1 files changed, 3 insertions, 2 deletions

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_suppressions.h b/compiler-rt/lib/sanitizer_common/sanitizer_suppressions.h
index e0b562e5825..92cb09365b5 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_suppressions.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_suppressions.h
@@ -25,6 +25,7 @@ enum SuppressionType {
   SuppressionThread,
   SuppressionSignal,
   SuppressionLeak,
+  SuppressionLib,
   SuppressionTypeCount
 };
 
@@ -40,7 +41,8 @@ class SuppressionContext {
   SuppressionContext() : suppressions_(1), can_parse_(true) {}
   void Parse(const char *str);
   bool Match(const char* str, SuppressionType type, Suppression **s);
-  uptr SuppressionCount();
+  uptr SuppressionCount() const;
+  const Suppression *SuppressionAt(uptr i) const;
   void GetMatched(InternalMmapVector<Suppression *> *matched);
 
  private:
@@ -52,7 +54,6 @@ class SuppressionContext {
 
 const char *SuppressionTypeString(SuppressionType t);
 
-// Exposed for testing.
 bool TemplateMatch(char *templ, const char *str);
 
 }  // namespace __sanitizer