mirror of
https://github.com/mozilla/gecko-dev.git
synced 2025-11-04 10:18:41 +02:00
44c4164368
This patch splits `nsAvailableMemoryWatcher` into 1) an nsISupports-derived class `nsAvailableMemoryWatcherBase` and 2) a platform-specific class `nsAvailableMemoryWatcher`, taking out the 2) part as a new file AvailableMemoryWatcherWin.cpp without any change. Test cases for `nsAvailableMemoryWatcher` will be added by a subsequent patch. Differential Revision: https://phabricator.services.mozilla.com/D117669
105 lines
2.9 KiB
C++
105 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "mozilla/MemoryInfo.h"
|
|
|
|
#include "mozilla/DebugOnly.h"
|
|
|
|
#include <algorithm>
|
|
#include <windows.h>
|
|
|
|
namespace mozilla {
|
|
|
|
/* static */
|
|
MemoryInfo MemoryInfo::Get(const void* aPtr, size_t aSize) {
|
|
MemoryInfo result;
|
|
|
|
result.mStart = uintptr_t(aPtr);
|
|
const char* ptr = reinterpret_cast<const char*>(aPtr);
|
|
const char* end = ptr + aSize;
|
|
DebugOnly<void*> base = nullptr;
|
|
while (ptr < end) {
|
|
MEMORY_BASIC_INFORMATION basicInfo;
|
|
if (!VirtualQuery(ptr, &basicInfo, sizeof(basicInfo))) {
|
|
break;
|
|
}
|
|
|
|
MOZ_ASSERT_IF(base, base == basicInfo.AllocationBase);
|
|
base = basicInfo.AllocationBase;
|
|
|
|
size_t regionSize =
|
|
std::min(size_t(basicInfo.RegionSize), size_t(end - ptr));
|
|
|
|
if (basicInfo.State == MEM_COMMIT) {
|
|
result.mCommitted += regionSize;
|
|
} else if (basicInfo.State == MEM_RESERVE) {
|
|
result.mReserved += regionSize;
|
|
} else if (basicInfo.State == MEM_FREE) {
|
|
result.mFree += regionSize;
|
|
} else {
|
|
MOZ_ASSERT_UNREACHABLE("Unexpected region state");
|
|
}
|
|
result.mSize += regionSize;
|
|
ptr += regionSize;
|
|
|
|
if (result.mType.isEmpty()) {
|
|
if (basicInfo.Type & MEM_IMAGE) {
|
|
result.mType += PageType::Image;
|
|
}
|
|
if (basicInfo.Type & MEM_MAPPED) {
|
|
result.mType += PageType::Mapped;
|
|
}
|
|
if (basicInfo.Type & MEM_PRIVATE) {
|
|
result.mType += PageType::Private;
|
|
}
|
|
|
|
// The first 8 bits of AllocationProtect are an enum. The remaining bits
|
|
// are flags.
|
|
switch (basicInfo.AllocationProtect & 0xff) {
|
|
case PAGE_EXECUTE_WRITECOPY:
|
|
result.mPerms += Perm::CopyOnWrite;
|
|
[[fallthrough]];
|
|
case PAGE_EXECUTE_READWRITE:
|
|
result.mPerms += Perm::Write;
|
|
[[fallthrough]];
|
|
case PAGE_EXECUTE_READ:
|
|
result.mPerms += Perm::Read;
|
|
[[fallthrough]];
|
|
case PAGE_EXECUTE:
|
|
result.mPerms += Perm::Execute;
|
|
break;
|
|
|
|
case PAGE_WRITECOPY:
|
|
result.mPerms += Perm::CopyOnWrite;
|
|
[[fallthrough]];
|
|
case PAGE_READWRITE:
|
|
result.mPerms += Perm::Write;
|
|
[[fallthrough]];
|
|
case PAGE_READONLY:
|
|
result.mPerms += Perm::Read;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (basicInfo.AllocationProtect & PAGE_GUARD) {
|
|
result.mPerms += Perm::Guard;
|
|
}
|
|
if (basicInfo.AllocationProtect & PAGE_NOCACHE) {
|
|
result.mPerms += Perm::NoCache;
|
|
}
|
|
if (basicInfo.AllocationProtect & PAGE_WRITECOMBINE) {
|
|
result.mPerms += Perm::WriteCombine;
|
|
}
|
|
}
|
|
}
|
|
|
|
result.mEnd = uintptr_t(ptr);
|
|
return result;
|
|
}
|
|
|
|
} // namespace mozilla
|