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-rw-r--r--lib/hwasan/hwasan_poisoning.cc36
1 files changed, 36 insertions, 0 deletions
diff --git a/lib/hwasan/hwasan_poisoning.cc b/lib/hwasan/hwasan_poisoning.cc
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+//===-- hwasan_poisoning.cc ---------------------------------------*- C++ -*-===//
+//
+// 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 HWAddressSanitizer.
+//
+//===----------------------------------------------------------------------===//
+
+#include "hwasan_poisoning.h"
+
+#include "interception/interception.h"
+#include "sanitizer_common/sanitizer_common.h"
+
+namespace __hwasan {
+
+uptr TagMemoryAligned(uptr p, uptr size, tag_t tag) {
+ CHECK(IsAligned(p, kShadowAlignment));
+ CHECK(IsAligned(size, kShadowAlignment));
+ uptr shadow_start = MEM_TO_SHADOW(p);
+ uptr shadow_size = MEM_TO_SHADOW_OFFSET(size);
+ internal_memset((void *)shadow_start, tag, shadow_size);
+ return AddTagToPointer(p, tag);
+}
+
+uptr TagMemory(uptr p, uptr size, tag_t tag) {
+ uptr start = RoundDownTo(p, kShadowAlignment);
+ uptr end = RoundUpTo(p + size, kShadowAlignment);
+ return TagMemoryAligned(start, end - start, tag);
+}
+
+} // namespace __hwasan