chromium/v8/test/cctest/test-icache.cc

// 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.

#include "src/codegen/assembler-inl.h"
#include "src/codegen/macro-assembler-inl.h"
#include "src/execution/simulator.h"
#include "src/handles/handles-inl.h"
#include "test/cctest/cctest.h"
#include "test/common/assembler-tester.h"

#if V8_ENABLE_WEBASSEMBLY
#include "src/wasm/code-space-access.h"
#endif  // V8_ENABLE_WEBASSEMBLY

namespace v8 {
namespace internal {
namespace test_icache {

F0;

#define __ …

static constexpr int kNumInstr = …;
static constexpr int kNumIterations = …;
static constexpr int kBufferSize = …;

static void FloodWithInc(Isolate* isolate, TestingAssemblerBuffer* buffer) { … }

static void FloodWithNop(Isolate* isolate, TestingAssemblerBuffer* buffer) { … }

// Order of operation for this test case:
//   exec -> perm(RW) -> patch -> flush -> perm(RX) -> exec
TEST(TestFlushICacheOfWritable) { … }

#if V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_ARM64
// Note that this order of operations is not supported on ARM32/64 because on
// some older ARM32/64 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
//
// Also note that this requires {kBufferSize == 8 * KB} to reproduce.
//
// The order of operations in V8 is akin to {TestFlushICacheOfWritable} above.
// It is hence OK to disable the below test on some architectures. Only the
// above test case should remain enabled on all architectures.
#define CONDITIONAL_TEST …
#else
#define CONDITIONAL_TEST …
#endif

// Order of operation for this test case:
//   exec -> perm(RW) -> patch -> perm(RX) -> flush -> exec
CONDITIONAL_TEST(TestFlushICacheOfExecutable) { … }

#undef CONDITIONAL_TEST

#if V8_ENABLE_WEBASSEMBLY
// Order of operation for this test case:
//   perm(RWX) -> exec -> patch -> flush -> exec
TEST(TestFlushICacheOfWritableAndExecutable) { … }
#endif  // V8_ENABLE_WEBASSEMBLY

#undef __

}  // namespace test_icache
}  // namespace internal
}  // namespace v8