53b0c62436
R=ulan@chromium.org Change-Id: Ib2eb33688517324884c4172560387242c71094fb Reviewed-on: https://chromium-review.googlesource.com/c/1342518 Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Michael Starzinger <mstarzinger@chromium.org> Cr-Commit-Position: refs/heads/master@{#57627}
59 lines
2.3 KiB
C++
59 lines
2.3 KiB
C++
// 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 = AllocatePages(GetPlatformPageAllocator(), address, alloc_size,
|
|
page_size, v8::PageAllocator::kReadWrite);
|
|
CHECK(result);
|
|
*allocated = alloc_size;
|
|
return static_cast<uint8_t*>(result);
|
|
}
|
|
|
|
static inline void MakeAssemblerBufferExecutable(uint8_t* buffer,
|
|
size_t allocated) {
|
|
// Flush the instruction cache as part of making the buffer executable.
|
|
// Note: we do this before setting permissions to ReadExecute because on
|
|
// some older Arm64 kernels there is a bug which causes an access error on
|
|
// cache flush instructions to trigger access error on non-writable memory.
|
|
// See https://bugs.chromium.org/p/v8/issues/detail?id=8157
|
|
Assembler::FlushICache(buffer, allocated);
|
|
|
|
bool result = SetPermissions(GetPlatformPageAllocator(), buffer, allocated,
|
|
v8::PageAllocator::kReadExecute);
|
|
CHECK(result);
|
|
}
|
|
|
|
static inline void MakeAssemblerBufferWritable(uint8_t* buffer,
|
|
size_t allocated) {
|
|
bool result = SetPermissions(GetPlatformPageAllocator(), buffer, allocated,
|
|
v8::PageAllocator::kReadWrite);
|
|
CHECK(result);
|
|
}
|
|
|
|
// TODO(wasm): Only needed for the "test-jump-table-assembler.cc" tests.
|
|
static inline void MakeAssemblerBufferWritableAndExecutable(uint8_t* buffer,
|
|
size_t allocated) {
|
|
bool result = SetPermissions(GetPlatformPageAllocator(), buffer, allocated,
|
|
v8::PageAllocator::kReadWriteExecute);
|
|
CHECK(result);
|
|
}
|
|
|
|
} // namespace internal
|
|
} // namespace v8
|
|
|
|
#endif // V8_TEST_COMMON_ASSEMBLER_TESTER_H_
|