[Sanitizer] Call Windows unwinder 'slow' and share StackTrace::Unwind across all platforms. No functionality change.

llvm-svn: 194193

1 files changed, 32 insertions, 0 deletions

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace_libcdep.cc b/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace_libcdep.cc
new file mode 100644
index 00000000000..8ce0918ded9
--- /dev/null
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace_libcdep.cc
@@ -0,0 +1,32 @@
+//===-- sanitizer_stacktrace_libcdep.cc -----------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// 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_stacktrace.h"
+
+namespace __sanitizer {
+
+void StackTrace::Unwind(uptr max_depth, uptr pc, uptr bp, uptr stack_top,
+                        uptr stack_bottom, bool fast) {
+  // Check if fast unwind is available. Fast unwind is the only option on Mac.
+  if (!SANITIZER_CAN_FAST_UNWIND)
+    fast = false;
+  else if (SANITIZER_MAC)
+    fast = true;
+
+  if (!fast)
+    SlowUnwindStack(pc, max_depth);
+  else
+    FastUnwindStack(pc, bp, stack_top, stack_bottom, max_depth);
+}
+
+}  // namespace __sanitizer