a8b04431a8
This reverts commit b1dd828707.
Reason for revert: Breaking fuschia build https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Fuchsia%20-%20builder/13592/overview
Original change's description:
> [builtins] Remap builtins on Linux
>
> This is a CL similar to
> https://chromium-review.googlesource.com/c/v8/v8/+/3553006, but on Linux
> rather than macOS. The goal is to allow builtins to use short builtin
> calls without paying a memory cost, by remapping rather than copying
> them.
>
> However, while macOS has a system call making this easier, on Linux we
> don't have one on most kernels. There is the recently-introduced
> mremap(MREMAP_DONTUNMMAP), which is available in 5.7, but only works on
> anonymous mappings until 5.13, which is too recent for most Android
> devices.
>
> Instead, we open() the file containing the builtins, and mmap() it at
> the desired location.
>
> Change-Id: I4524f349948b8f48c4536cf392a1cd179662a6cc
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3570426
> Reviewed-by: Igor Sheludko <ishell@chromium.org>
> Reviewed-by: Jakob Linke <jgruber@chromium.org>
> Commit-Queue: Benoit Lize <lizeb@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#80022}
Change-Id: I0093fe84216f8c8fd1a8691c53817e578d92fa40
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3594009
Auto-Submit: Shu-yu Guo <syg@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Owners-Override: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80028}
135 lines
3.8 KiB
C++
135 lines
3.8 KiB
C++
// Copyright 2014 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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#include "src/base/platform/platform.h"
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#include <cstring>
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#include "testing/gtest/include/gtest/gtest.h"
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#if V8_OS_WIN
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#include <windows.h>
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#endif
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namespace v8 {
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namespace base {
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TEST(OS, GetCurrentProcessId) {
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#if V8_OS_POSIX
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EXPECT_EQ(static_cast<int>(getpid()), OS::GetCurrentProcessId());
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#endif
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#if V8_OS_WIN
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EXPECT_EQ(static_cast<int>(::GetCurrentProcessId()),
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OS::GetCurrentProcessId());
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#endif
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}
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TEST(OS, RemapPages) {
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if constexpr (OS::IsRemapPageSupported()) {
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size_t size = base::OS::AllocatePageSize();
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// Data to be remapped, filled with data.
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void* data = OS::Allocate(nullptr, size, base::OS::AllocatePageSize(),
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OS::MemoryPermission::kReadWrite);
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ASSERT_TRUE(data);
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memset(data, 0xab, size);
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// Target mapping.
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void* remapped_data =
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OS::Allocate(nullptr, size, base::OS::AllocatePageSize(),
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OS::MemoryPermission::kReadWrite);
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ASSERT_TRUE(remapped_data);
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EXPECT_TRUE(OS::RemapPages(data, size, remapped_data,
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OS::MemoryPermission::kReadExecute));
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EXPECT_EQ(0, memcmp(remapped_data, data, size));
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OS::Free(data, size);
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OS::Free(remapped_data, size);
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}
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}
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namespace {
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class ThreadLocalStorageTest : public Thread, public ::testing::Test {
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public:
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ThreadLocalStorageTest() : Thread(Options("ThreadLocalStorageTest")) {
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for (size_t i = 0; i < arraysize(keys_); ++i) {
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keys_[i] = Thread::CreateThreadLocalKey();
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}
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}
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~ThreadLocalStorageTest() override {
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for (size_t i = 0; i < arraysize(keys_); ++i) {
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Thread::DeleteThreadLocalKey(keys_[i]);
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}
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}
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void Run() final {
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for (size_t i = 0; i < arraysize(keys_); i++) {
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CHECK(!Thread::HasThreadLocal(keys_[i]));
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}
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for (size_t i = 0; i < arraysize(keys_); i++) {
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Thread::SetThreadLocal(keys_[i], GetValue(i));
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}
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for (size_t i = 0; i < arraysize(keys_); i++) {
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CHECK(Thread::HasThreadLocal(keys_[i]));
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}
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for (size_t i = 0; i < arraysize(keys_); i++) {
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CHECK_EQ(GetValue(i), Thread::GetThreadLocal(keys_[i]));
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CHECK_EQ(GetValue(i), Thread::GetExistingThreadLocal(keys_[i]));
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}
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for (size_t i = 0; i < arraysize(keys_); i++) {
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Thread::SetThreadLocal(keys_[i], GetValue(arraysize(keys_) - i - 1));
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}
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for (size_t i = 0; i < arraysize(keys_); i++) {
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CHECK(Thread::HasThreadLocal(keys_[i]));
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}
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for (size_t i = 0; i < arraysize(keys_); i++) {
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CHECK_EQ(GetValue(arraysize(keys_) - i - 1),
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Thread::GetThreadLocal(keys_[i]));
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CHECK_EQ(GetValue(arraysize(keys_) - i - 1),
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Thread::GetExistingThreadLocal(keys_[i]));
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}
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}
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private:
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static void* GetValue(size_t x) {
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return bit_cast<void*>(static_cast<uintptr_t>(x + 1));
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}
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// Older versions of Android have fewer TLS slots (nominally 64, but the
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// system uses "about 5 of them" itself).
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Thread::LocalStorageKey keys_[32];
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};
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} // namespace
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TEST_F(ThreadLocalStorageTest, DoTest) {
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Run();
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CHECK(Start());
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Join();
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}
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TEST(StackTest, GetStackStart) { EXPECT_NE(nullptr, Stack::GetStackStart()); }
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TEST(StackTest, GetCurrentStackPosition) {
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EXPECT_NE(nullptr, Stack::GetCurrentStackPosition());
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}
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#if !V8_OS_FUCHSIA
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TEST(StackTest, StackVariableInBounds) {
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void* dummy;
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ASSERT_GT(static_cast<void*>(Stack::GetStackStart()),
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Stack::GetCurrentStackPosition());
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EXPECT_GT(static_cast<void*>(Stack::GetStackStart()),
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Stack::GetRealStackAddressForSlot(&dummy));
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EXPECT_LT(static_cast<void*>(Stack::GetCurrentStackPosition()),
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Stack::GetRealStackAddressForSlot(&dummy));
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}
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#endif // !V8_OS_FUCHSIA
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} // namespace base
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} // namespace v8
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