mirror of
https://github.com/dart-lang/sdk
synced 2024-09-16 02:07:06 +00:00
5cec85d5ce
Fixes the standalone embedder's ELF loader using the VM's compressed heap after Dart_Cleanup. This removes the last non-test layering violation of runtime/bin files including runtime/vm files. TEST=ci Bug: https://github.com/dart-lang/sdk/issues/46810 Bug: https://github.com/dart-lang/sdk/issues/46880 Change-Id: I6c430ae61c057016f7cd56188879a9ccb3699d30 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/209847 Commit-Queue: Ryan Macnak <rmacnak@google.com> Reviewed-by: Alexander Aprelev <aam@google.com>
80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
// Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "platform/globals.h"
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#if defined(DART_HOST_OS_WINDOWS)
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#include "bin/virtual_memory.h"
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#include "platform/assert.h"
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#include "platform/utils.h"
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namespace dart {
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namespace bin {
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uword VirtualMemory::page_size_ = 0;
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intptr_t VirtualMemory::CalculatePageSize() {
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SYSTEM_INFO info;
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GetSystemInfo(&info);
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const intptr_t page_size = info.dwPageSize;
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ASSERT(page_size != 0);
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ASSERT(Utils::IsPowerOfTwo(page_size));
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return page_size;
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}
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VirtualMemory* VirtualMemory::Allocate(intptr_t size,
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bool is_executable,
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const char* name) {
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ASSERT(Utils::IsAligned(size, PageSize()));
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int prot = is_executable ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE;
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void* address = VirtualAlloc(nullptr, size, MEM_RESERVE | MEM_COMMIT, prot);
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if (address == nullptr) {
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return nullptr;
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}
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return new VirtualMemory(address, size);
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}
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VirtualMemory::~VirtualMemory() {
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if (address_ != nullptr) {
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if (VirtualFree(address_, 0, MEM_RELEASE) == 0) {
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FATAL("VirtualFree failed: Error code %d\n", GetLastError());
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}
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}
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}
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void VirtualMemory::Protect(void* address, intptr_t size, Protection mode) {
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uword start_address = reinterpret_cast<uword>(address);
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uword end_address = start_address + size;
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uword page_address = Utils::RoundDown(start_address, PageSize());
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DWORD prot = 0;
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switch (mode) {
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case kNoAccess:
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prot = PAGE_NOACCESS;
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break;
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case kReadOnly:
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prot = PAGE_READONLY;
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break;
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case kReadWrite:
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prot = PAGE_READWRITE;
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break;
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case kReadExecute:
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prot = PAGE_EXECUTE_READ;
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break;
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case kReadWriteExecute:
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prot = PAGE_EXECUTE_READWRITE;
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break;
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}
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DWORD old_prot = 0;
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if (VirtualProtect(reinterpret_cast<void*>(page_address),
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end_address - page_address, prot, &old_prot) == 0) {
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FATAL("VirtualProtect failed %d\n", GetLastError());
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}
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}
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} // namespace bin
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} // namespace dart
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#endif // defined(DART_HOST_OS_WINDOWS)
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