1 files changed, 46 insertions, 0 deletions
diff --git a/deps/v8/test/common/assembler-tester.h b/deps/v8/test/common/assembler-tester.h
new file mode 100644
index 00000000000..0291e48efb5
--- /dev/null
+++ b/deps/v8/test/common/assembler-tester.h
@@ -0,0 +1,46 @@
+// Copyright 2018 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_TEST_COMMON_ASSEMBLER_TESTER_H_
+#define V8_TEST_COMMON_ASSEMBLER_TESTER_H_
+
+#include "src/assembler.h"
+
+namespace v8 {
+namespace internal {
+
+static inline uint8_t* AllocateAssemblerBuffer(
+    size_t* allocated,
+    size_t requested = v8::internal::AssemblerBase::kMinimalBufferSize,
+    void* address = nullptr) {
+  size_t page_size = v8::internal::AllocatePageSize();
+  size_t alloc_size = RoundUp(requested, page_size);
+  void* result = v8::internal::AllocatePages(
+      address, alloc_size, page_size, v8::PageAllocator::kReadWriteExecute);
+  CHECK(result);
+  *allocated = alloc_size;
+  return static_cast<uint8_t*>(result);
+}
+
+static inline void MakeAssemblerBufferExecutable(uint8_t* buffer,
+                                                 size_t allocated) {
+  bool result = v8::internal::SetPermissions(buffer, allocated,
+                                             v8::PageAllocator::kReadExecute);
+  CHECK(result);
+
+  // Flush the instruction cache as part of making the buffer executable.
+  Assembler::FlushICache(buffer, allocated);
+}
+
+static inline void MakeAssemblerBufferWritable(uint8_t* buffer,
+                                               size_t allocated) {
+  bool result = v8::internal::SetPermissions(buffer, allocated,
+                                             v8::PageAllocator::kReadWrite);
+  CHECK(result);
+}
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_TEST_COMMON_ASSEMBLER_TESTER_H_