1 files changed, 64 insertions, 0 deletions
diff --git a/deps/v8/src/execution/isolate-utils-inl.h b/deps/v8/src/execution/isolate-utils-inl.h
new file mode 100644
index 0000000000..6095970a31
--- /dev/null
+++ b/deps/v8/src/execution/isolate-utils-inl.h
@@ -0,0 +1,64 @@
+// Copyright 2019 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef V8_EXECUTION_ISOLATE_UTILS_INL_H_
+#define V8_EXECUTION_ISOLATE_UTILS_INL_H_
+
+#include "src/execution/isolate-utils.h"
+
+#include "src/common/ptr-compr-inl.h"
+#include "src/execution/isolate.h"
+#include "src/heap/heap-write-barrier-inl.h"
+
+namespace v8 {
+namespace internal {
+
+inline Isolate* GetIsolateForPtrCompr(HeapObject object) {
+#ifdef V8_COMPRESS_POINTERS
+  return Isolate::FromRoot(GetIsolateRoot(object.ptr()));
+#else
+  return nullptr;
+#endif  // V8_COMPRESS_POINTERS
+}
+
+V8_INLINE Heap* GetHeapFromWritableObject(HeapObject object) {
+#ifdef V8_COMPRESS_POINTERS
+  return GetIsolateFromWritableObject(object)->heap();
+#else
+  heap_internals::MemoryChunk* chunk =
+      heap_internals::MemoryChunk::FromHeapObject(object);
+  return chunk->GetHeap();
+#endif  // V8_COMPRESS_POINTERS
+}
+
+V8_INLINE Isolate* GetIsolateFromWritableObject(HeapObject object) {
+#ifdef V8_COMPRESS_POINTERS
+  Isolate* isolate = Isolate::FromRoot(GetIsolateRoot(object.ptr()));
+  DCHECK_NOT_NULL(isolate);
+  return isolate;
+#else
+  return Isolate::FromHeap(GetHeapFromWritableObject(object));
+#endif  // V8_COMPRESS_POINTERS
+}
+
+V8_INLINE bool GetIsolateFromHeapObject(HeapObject object, Isolate** isolate) {
+#ifdef V8_COMPRESS_POINTERS
+  *isolate = GetIsolateFromWritableObject(object);
+  return true;
+#else
+  heap_internals::MemoryChunk* chunk =
+      heap_internals::MemoryChunk::FromHeapObject(object);
+  if (chunk->InReadOnlySpace()) {
+    *isolate = nullptr;
+    return false;
+  }
+  *isolate = Isolate::FromHeap(chunk->GetHeap());
+  return true;
+#endif  // V8_COMPRESS_POINTERS
+}
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_EXECUTION_ISOLATE_UTILS_INL_H_