Import the asan runtime library into GCC tree

This patch imports the runtime library in the GCC tree, ensures that
-lasan is passed to the linker when -faddress-sanitizer is used and
sets up the build system accordingly.

ChangeLog:

	* configure.ac: Add libsanitizer to target_libraries.
	* Makefile.def: Ditto.
	* configure: Regenerate.
	* Makefile.in: Regenerate.
	* libsanitizer: New directory for asan runtime.  Contains an empty
	tsan directory.

gcc/ChangeLog:

	* gcc.c (LINK_COMMAND_SPEC): Add -laddress-sanitizer to link
	command if -faddress-sanitizer is on.

libsanitizer:

	Initial checkin: migrate asan runtime from llvm.

From-SVN: r193441

1 files changed, 35 insertions, 0 deletions

diff --git a/libsanitizer/asan/asan_stack.cc b/libsanitizer/asan/asan_stack.cc
new file mode 100644
index 0000000..2531a7f
--- /dev/null
+++ b/libsanitizer/asan/asan_stack.cc
@@ -0,0 +1,35 @@
+//===-- asan_stack.cc -----------------------------------------------------===//
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of AddressSanitizer, an address sanity checker.
+//
+// Code for ASan stack trace.
+//===----------------------------------------------------------------------===//
+#include "asan_flags.h"
+#include "asan_stack.h"
+#include "sanitizer/asan_interface.h"
+
+namespace __asan {
+
+void PrintStack(StackTrace *stack) {
+  stack->PrintStack(stack->trace, stack->size, flags()->symbolize,
+                    flags()->strip_path_prefix, __asan_symbolize);
+}
+
+}  // namespace __asan
+
+// ------------------ Interface -------------- {{{1
+
+// Provide default implementation of __asan_symbolize that does nothing
+// and may be overriden by user if he wants to use his own symbolization.
+// ASan on Windows has its own implementation of this.
+#ifndef _WIN32
+SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE NOINLINE
+bool __asan_symbolize(const void *pc, char *out_buffer, int out_size) {
+  return false;
+}
+#endif