1 files changed, 106 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/asan/asan_interceptors_memintrinsics.cpp b/contrib/llvm-project/compiler-rt/lib/asan/asan_interceptors_memintrinsics.cpp
new file mode 100644
index 000000000000..bdf328f89206
--- /dev/null
+++ b/contrib/llvm-project/compiler-rt/lib/asan/asan_interceptors_memintrinsics.cpp
@@ -0,0 +1,106 @@
+//===-- asan_interceptors_memintrinsics.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 AddressSanitizer, an address sanity checker.
+//
+// ASan versions of memcpy, memmove, and memset.
+//===---------------------------------------------------------------------===//
+
+#define SANITIZER_COMMON_NO_REDEFINE_BUILTINS
+
+#include "asan_interceptors_memintrinsics.h"
+
+#include "asan_interceptors.h"
+#include "asan_report.h"
+#include "asan_stack.h"
+#include "asan_suppressions.h"
+
+using namespace __asan;
+
+// memcpy is called during __asan_init() from the internals of printf(...).
+// We do not treat memcpy with to==from as a bug.
+// See http://llvm.org/bugs/show_bug.cgi?id=11763.
+#define ASAN_MEMCPY_IMPL(ctx, to, from, size)                 \
+  do {                                                        \
+    if (LIKELY(replace_intrin_cached)) {                      \
+      if (LIKELY(to != from)) {                               \
+        CHECK_RANGES_OVERLAP("memcpy", to, size, from, size); \
+      }                                                       \
+      ASAN_READ_RANGE(ctx, from, size);                       \
+      ASAN_WRITE_RANGE(ctx, to, size);                        \
+    } else if (UNLIKELY(!AsanInited())) {                     \
+      return internal_memcpy(to, from, size);                 \
+    }                                                         \
+    return REAL(memcpy)(to, from, size);                      \
+  } while (0)
+
+// memset is called inside Printf.
+#define ASAN_MEMSET_IMPL(ctx, block, c, size) \
+  do {                                        \
+    if (LIKELY(replace_intrin_cached)) {      \
+      ASAN_WRITE_RANGE(ctx, block, size);     \
+    } else if (UNLIKELY(!AsanInited())) {     \
+      return internal_memset(block, c, size); \
+    }                                         \
+    return REAL(memset)(block, c, size);      \
+  } while (0)
+
+#define ASAN_MEMMOVE_IMPL(ctx, to, from, size) \
+  do {                                         \
+    if (LIKELY(replace_intrin_cached)) {       \
+      ASAN_READ_RANGE(ctx, from, size);        \
+      ASAN_WRITE_RANGE(ctx, to, size);         \
+    }                                          \
+    return internal_memmove(to, from, size);   \
+  } while (0)
+
+void *__asan_memcpy(void *to, const void *from, uptr size) {
+  ASAN_MEMCPY_IMPL(nullptr, to, from, size);
+}
+
+void *__asan_memset(void *block, int c, uptr size) {
+  ASAN_MEMSET_IMPL(nullptr, block, c, size);
+}
+
+void *__asan_memmove(void *to, const void *from, uptr size) {
+  ASAN_MEMMOVE_IMPL(nullptr, to, from, size);
+}
+
+#if SANITIZER_FUCHSIA
+
+// Fuchsia doesn't use sanitizer_common_interceptors.inc, but
+// the only things there it wants are these three.  Just define them
+// as aliases here rather than repeating the contents.
+
+extern "C" decltype(__asan_memcpy) memcpy[[gnu::alias("__asan_memcpy")]];
+extern "C" decltype(__asan_memmove) memmove[[gnu::alias("__asan_memmove")]];
+extern "C" decltype(__asan_memset) memset[[gnu::alias("__asan_memset")]];
+
+#else  // SANITIZER_FUCHSIA
+
+#define COMMON_INTERCEPTOR_MEMMOVE_IMPL(ctx, to, from, size) \
+  do {                                                       \
+    ASAN_INTERCEPTOR_ENTER(ctx, memmove);                    \
+    ASAN_MEMMOVE_IMPL(ctx, to, from, size);                  \
+  } while (false)
+
+#define COMMON_INTERCEPTOR_MEMCPY_IMPL(ctx, to, from, size) \
+  do {                                                      \
+    ASAN_INTERCEPTOR_ENTER(ctx, memcpy);                    \
+    ASAN_MEMCPY_IMPL(ctx, to, from, size);                  \
+  } while (false)
+
+#define COMMON_INTERCEPTOR_MEMSET_IMPL(ctx, block, c, size) \
+  do {                                                      \
+    ASAN_INTERCEPTOR_ENTER(ctx, memset);                    \
+    ASAN_MEMSET_IMPL(ctx, block, c, size);                  \
+  } while (false)
+
+#include "sanitizer_common/sanitizer_common_interceptors_memintrinsics.inc"
+
+#endif  // SANITIZER_FUCHSIA