859b2d77c6
Since we switched to C++14 now, we can use {std::make_unique} instead
of our own {base::make_unique} from {template-utils.h}.
R=mstarzinger@chromium.org, yangguo@chromium.org
Bug: v8:9687
No-Try: true
Change-Id: I660eb30038bbb079cee93c7861cd87ccd134f01b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1789300
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63642}
84 lines
2.8 KiB
C++
84 lines
2.8 KiB
C++
// Copyright 2018 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_TEST_COMMON_ASSEMBLER_TESTER_H_
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#define V8_TEST_COMMON_ASSEMBLER_TESTER_H_
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#include "src/codegen/assembler.h"
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#include "src/codegen/code-desc.h"
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namespace v8 {
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namespace internal {
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class TestingAssemblerBuffer : public AssemblerBuffer {
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public:
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TestingAssemblerBuffer(size_t requested, void* address) {
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size_t page_size = v8::internal::AllocatePageSize();
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size_t alloc_size = RoundUp(requested, page_size);
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CHECK_GE(kMaxInt, alloc_size);
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size_ = static_cast<int>(alloc_size);
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buffer_ = static_cast<byte*>(AllocatePages(GetPlatformPageAllocator(),
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address, alloc_size, page_size,
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v8::PageAllocator::kReadWrite));
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CHECK_NOT_NULL(buffer_);
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}
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~TestingAssemblerBuffer() {
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CHECK(FreePages(GetPlatformPageAllocator(), buffer_, size_));
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}
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byte* start() const override { return buffer_; }
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int size() const override { return size_; }
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std::unique_ptr<AssemblerBuffer> Grow(int new_size) override {
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FATAL("Cannot grow TestingAssemblerBuffer");
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}
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std::unique_ptr<AssemblerBuffer> CreateView() const {
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return ExternalAssemblerBuffer(buffer_, size_);
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}
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void MakeExecutable() {
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// Flush the instruction cache as part of making the buffer executable.
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// Note: we do this before setting permissions to ReadExecute because on
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// some older ARM kernels there is a bug which causes an access error on
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// cache flush instructions to trigger access error on non-writable memory.
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// See https://bugs.chromium.org/p/v8/issues/detail?id=8157
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FlushInstructionCache(buffer_, size_);
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bool result = SetPermissions(GetPlatformPageAllocator(), buffer_, size_,
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v8::PageAllocator::kReadExecute);
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CHECK(result);
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}
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void MakeWritable() {
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bool result = SetPermissions(GetPlatformPageAllocator(), buffer_, size_,
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v8::PageAllocator::kReadWrite);
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CHECK(result);
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}
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// TODO(wasm): Only needed for the "test-jump-table-assembler.cc" tests.
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void MakeWritableAndExecutable() {
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bool result = SetPermissions(GetPlatformPageAllocator(), buffer_, size_,
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v8::PageAllocator::kReadWriteExecute);
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CHECK(result);
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}
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private:
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byte* buffer_;
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int size_;
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};
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static inline std::unique_ptr<TestingAssemblerBuffer> AllocateAssemblerBuffer(
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size_t requested = v8::internal::AssemblerBase::kMinimalBufferSize,
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void* address = nullptr) {
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return std::make_unique<TestingAssemblerBuffer>(requested, address);
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}
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} // namespace internal
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} // namespace v8
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#endif // V8_TEST_COMMON_ASSEMBLER_TESTER_H_
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