libsanitizer merge from upstream r196090

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@205695 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 61 insertions, 0 deletions

diff --git a/libsanitizer/sanitizer_common/sanitizer_symbolizer.cc b/libsanitizer/sanitizer_common/sanitizer_symbolizer.cc
new file mode 100644
index 00000000000..f417b087ae2
--- /dev/null
+++ b/libsanitizer/sanitizer_common/sanitizer_symbolizer.cc
@@ -0,0 +1,61 @@
+//===-- sanitizer_symbolizer.cc -------------------------------------------===//
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is shared between AddressSanitizer and ThreadSanitizer
+// run-time libraries.
+//===----------------------------------------------------------------------===//
+
+#include "sanitizer_platform.h"
+#include "sanitizer_internal_defs.h"
+#include "sanitizer_placement_new.h"
+#include "sanitizer_symbolizer.h"
+
+namespace __sanitizer {
+
+Symbolizer *Symbolizer::symbolizer_;
+StaticSpinMutex Symbolizer::init_mu_;
+LowLevelAllocator Symbolizer::symbolizer_allocator_;
+
+Symbolizer *Symbolizer::GetOrNull() {
+  SpinMutexLock l(&init_mu_);
+  return symbolizer_;
+}
+
+Symbolizer *Symbolizer::Get() {
+  SpinMutexLock l(&init_mu_);
+  RAW_CHECK_MSG(symbolizer_ != 0, "Using uninitialized symbolizer!");
+  return symbolizer_;
+}
+
+Symbolizer *Symbolizer::Disable() {
+  CHECK_EQ(0, symbolizer_);
+  // Initialize a dummy symbolizer.
+  symbolizer_ = new(symbolizer_allocator_) Symbolizer;
+  return symbolizer_;
+}
+
+void Symbolizer::AddHooks(Symbolizer::StartSymbolizationHook start_hook,
+                          Symbolizer::EndSymbolizationHook end_hook) {
+  CHECK(start_hook_ == 0 && end_hook_ == 0);
+  start_hook_ = start_hook;
+  end_hook_ = end_hook;
+}
+
+Symbolizer::Symbolizer() : start_hook_(0), end_hook_(0) {}
+
+Symbolizer::SymbolizerScope::SymbolizerScope(const Symbolizer *sym)
+    : sym_(sym) {
+  if (sym_->start_hook_)
+    sym_->start_hook_();
+}
+
+Symbolizer::SymbolizerScope::~SymbolizerScope() {
+  if (sym_->end_hook_)
+    sym_->end_hook_();
+}
+
+}  // namespace __sanitizer