vendor/compiler-rt/compiler-rt-trunk-r375505vendor/compiler-rt

1 files changed, 108 insertions, 0 deletions

diff --git a/lib/msan/msan_new_delete.cpp b/lib/msan/msan_new_delete.cpp
new file mode 100644
index 000000000000..d4e95c0f6513
--- /dev/null
+++ b/lib/msan/msan_new_delete.cpp
@@ -0,0 +1,108 @@
+//===-- msan_new_delete.cpp -----------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of MemorySanitizer.
+//
+// Interceptors for operators new and delete.
+//===----------------------------------------------------------------------===//
+
+#include "msan.h"
+#include "interception/interception.h"
+#include "sanitizer_common/sanitizer_allocator.h"
+#include "sanitizer_common/sanitizer_allocator_report.h"
+
+#if MSAN_REPLACE_OPERATORS_NEW_AND_DELETE
+
+#include <stddef.h>
+
+using namespace __msan;
+
+// Fake std::nothrow_t and std::align_val_t to avoid including <new>.
+namespace std {
+  struct nothrow_t {};
+  enum class align_val_t: size_t {};
+}  // namespace std
+
+
+// TODO(alekseys): throw std::bad_alloc instead of dying on OOM.
+#define OPERATOR_NEW_BODY(nothrow) \
+  GET_MALLOC_STACK_TRACE; \
+  void *res = msan_malloc(size, &stack);\
+  if (!nothrow && UNLIKELY(!res)) ReportOutOfMemory(size, &stack);\
+  return res
+#define OPERATOR_NEW_BODY_ALIGN(nothrow) \
+  GET_MALLOC_STACK_TRACE;\
+  void *res = msan_memalign((uptr)align, size, &stack);\
+  if (!nothrow && UNLIKELY(!res)) ReportOutOfMemory(size, &stack);\
+  return res;
+
+INTERCEPTOR_ATTRIBUTE
+void *operator new(size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); }
+INTERCEPTOR_ATTRIBUTE
+void *operator new[](size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); }
+INTERCEPTOR_ATTRIBUTE
+void *operator new(size_t size, std::nothrow_t const&) {
+  OPERATOR_NEW_BODY(true /*nothrow*/);
+}
+INTERCEPTOR_ATTRIBUTE
+void *operator new[](size_t size, std::nothrow_t const&) {
+  OPERATOR_NEW_BODY(true /*nothrow*/);
+}
+INTERCEPTOR_ATTRIBUTE
+void *operator new(size_t size, std::align_val_t align)
+{ OPERATOR_NEW_BODY_ALIGN(false /*nothrow*/); }
+INTERCEPTOR_ATTRIBUTE
+void *operator new[](size_t size, std::align_val_t align)
+{ OPERATOR_NEW_BODY_ALIGN(false /*nothrow*/); }
+INTERCEPTOR_ATTRIBUTE
+void *operator new(size_t size, std::align_val_t align, std::nothrow_t const&)
+{ OPERATOR_NEW_BODY_ALIGN(true /*nothrow*/); }
+INTERCEPTOR_ATTRIBUTE
+void *operator new[](size_t size, std::align_val_t align, std::nothrow_t const&)
+{ OPERATOR_NEW_BODY_ALIGN(true /*nothrow*/); }
+
+#define OPERATOR_DELETE_BODY \
+  GET_MALLOC_STACK_TRACE; \
+  if (ptr) MsanDeallocate(&stack, ptr)
+
+INTERCEPTOR_ATTRIBUTE
+void operator delete(void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; }
+INTERCEPTOR_ATTRIBUTE
+void operator delete[](void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; }
+INTERCEPTOR_ATTRIBUTE
+void operator delete(void *ptr, std::nothrow_t const&) { OPERATOR_DELETE_BODY; }
+INTERCEPTOR_ATTRIBUTE
+void operator delete[](void *ptr, std::nothrow_t const&) {
+  OPERATOR_DELETE_BODY;
+}
+INTERCEPTOR_ATTRIBUTE
+void operator delete(void *ptr, size_t size) NOEXCEPT { OPERATOR_DELETE_BODY; }
+INTERCEPTOR_ATTRIBUTE
+void operator delete[](void *ptr, size_t size) NOEXCEPT
+{ OPERATOR_DELETE_BODY; }
+INTERCEPTOR_ATTRIBUTE
+void operator delete(void *ptr, std::align_val_t align) NOEXCEPT
+{ OPERATOR_DELETE_BODY; }
+INTERCEPTOR_ATTRIBUTE
+void operator delete[](void *ptr, std::align_val_t align) NOEXCEPT
+{ OPERATOR_DELETE_BODY; }
+INTERCEPTOR_ATTRIBUTE
+void operator delete(void *ptr, std::align_val_t align, std::nothrow_t const&)
+{ OPERATOR_DELETE_BODY; }
+INTERCEPTOR_ATTRIBUTE
+void operator delete[](void *ptr, std::align_val_t align, std::nothrow_t const&)
+{ OPERATOR_DELETE_BODY; }
+INTERCEPTOR_ATTRIBUTE
+void operator delete(void *ptr, size_t size, std::align_val_t align) NOEXCEPT
+{ OPERATOR_DELETE_BODY; }
+INTERCEPTOR_ATTRIBUTE
+void operator delete[](void *ptr, size_t size, std::align_val_t align) NOEXCEPT
+{ OPERATOR_DELETE_BODY; }
+
+
+#endif // MSAN_REPLACE_OPERATORS_NEW_AND_DELETE