[msan] MemorySanitizer runtime.

Initial commit of the MemorySanitizer runtime library.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@169858 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 51 insertions, 0 deletions

diff --git a/lib/msan/msan_new_delete.cc b/lib/msan/msan_new_delete.cc
new file mode 100644
index 000000000..c4efe2ef7
--- /dev/null
+++ b/lib/msan/msan_new_delete.cc
@@ -0,0 +1,51 @@
+//===-- msan_new_delete.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 a part of MemorySanitizer.
+//
+// Interceptors for operators new and delete.
+//===----------------------------------------------------------------------===//
+
+#include "msan.h"
+
+#include <stddef.h>
+
+namespace __msan {
+// This function is a no-op. We need it to make sure that object file
+// with our replacements will actually be loaded from static MSan
+// run-time library at link-time.
+void ReplaceOperatorsNewAndDelete() { }
+}
+
+using namespace __msan;  // NOLINT
+
+// Fake std::nothrow_t to avoid including <new>.
+namespace std {
+  struct nothrow_t {};
+}  // namespace std
+
+
+#define OPERATOR_NEW_BODY \
+  GET_MALLOC_STACK_TRACE; \
+  return MsanReallocate(&stack, 0, size, sizeof(u64), false)
+
+void *operator new(size_t size) { OPERATOR_NEW_BODY; }
+void *operator new[](size_t size) { OPERATOR_NEW_BODY; }
+void *operator new(size_t size, std::nothrow_t const&) { OPERATOR_NEW_BODY; }
+void *operator new[](size_t size, std::nothrow_t const&) { OPERATOR_NEW_BODY; }
+
+#define OPERATOR_DELETE_BODY \
+  if (ptr) MsanDeallocate(ptr)
+
+void operator delete(void *ptr) { OPERATOR_DELETE_BODY; }
+void operator delete[](void *ptr) { OPERATOR_DELETE_BODY; }
+void operator delete(void *ptr, std::nothrow_t const&) { OPERATOR_DELETE_BODY; }
+void operator delete[](void *ptr, std::nothrow_t const&) {
+  OPERATOR_DELETE_BODY;
+}