mirror of
https://github.com/chromium/crashpad.git
synced 2024-12-29 00:32:35 +08:00
ccd5ec6404
Sadly this code did not survive a collision with the real world. In probing for the environment block there's a MEM_COMMIT region followed directly by a MEM_RESERVE region (past the end of the environment block). Update region checker to correctly treat MEM_RESERVE as inaccessible. R=mark@chromium.org BUG=crashpad:20, crashpad:46, crashpad:59 Review URL: https://codereview.chromium.org/1370063005 .
525 lines
17 KiB
C++
525 lines
17 KiB
C++
// Copyright 2015 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "util/win/process_info.h"
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#include <imagehlp.h>
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#include <intrin.h>
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#include <wchar.h>
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#include "base/files/file_path.h"
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#include "base/memory/scoped_ptr.h"
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#include "build/build_config.h"
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#include "gtest/gtest.h"
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#include "test/paths.h"
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#include "test/win/child_launcher.h"
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#include "util/file/file_io.h"
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#include "util/misc/uuid.h"
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#include "util/win/scoped_handle.h"
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namespace crashpad {
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namespace test {
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namespace {
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const wchar_t kNtdllName[] = L"\\ntdll.dll";
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time_t GetTimestampForModule(HMODULE module) {
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char filename[MAX_PATH];
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// `char` and GetModuleFileNameA because ImageLoad is ANSI only.
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if (!GetModuleFileNameA(module, filename, arraysize(filename)))
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return 0;
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LOADED_IMAGE* loaded_image = ImageLoad(filename, nullptr);
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return loaded_image->FileHeader->FileHeader.TimeDateStamp;
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}
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bool IsProcessWow64(HANDLE process_handle) {
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static decltype(IsWow64Process)* is_wow64_process =
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reinterpret_cast<decltype(IsWow64Process)*>(
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GetProcAddress(LoadLibrary(L"kernel32.dll"), "IsWow64Process"));
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if (!is_wow64_process)
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return false;
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BOOL is_wow64;
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if (!is_wow64_process(process_handle, &is_wow64)) {
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PLOG(ERROR) << "IsWow64Process";
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return false;
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}
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return is_wow64;
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}
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void VerifyAddressInInCodePage(const ProcessInfo& process_info,
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WinVMAddress code_address) {
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// Make sure the child code address is an code page address with the right
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// information.
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const std::vector<ProcessInfo::MemoryInfo>& memory_info =
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process_info.MemoryInformation();
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bool found_region = false;
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for (const auto& mi : memory_info) {
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if (mi.base_address <= code_address &&
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mi.base_address + mi.region_size > code_address) {
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EXPECT_EQ(MEM_COMMIT, mi.state);
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EXPECT_EQ(PAGE_EXECUTE_READ, mi.protect);
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EXPECT_EQ(MEM_IMAGE, mi.type);
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EXPECT_FALSE(found_region);
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found_region = true;
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}
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}
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EXPECT_TRUE(found_region);
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}
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TEST(ProcessInfo, Self) {
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ProcessInfo process_info;
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ASSERT_TRUE(process_info.Initialize(GetCurrentProcess()));
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EXPECT_EQ(GetCurrentProcessId(), process_info.ProcessID());
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EXPECT_GT(process_info.ParentProcessID(), 0u);
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#if defined(ARCH_CPU_64_BITS)
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EXPECT_TRUE(process_info.Is64Bit());
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EXPECT_FALSE(process_info.IsWow64());
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#else
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EXPECT_FALSE(process_info.Is64Bit());
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if (IsProcessWow64(GetCurrentProcess()))
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EXPECT_TRUE(process_info.IsWow64());
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else
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EXPECT_FALSE(process_info.IsWow64());
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#endif
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std::wstring command_line;
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EXPECT_TRUE(process_info.CommandLine(&command_line));
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EXPECT_EQ(std::wstring(GetCommandLine()), command_line);
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std::vector<ProcessInfo::Module> modules;
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EXPECT_TRUE(process_info.Modules(&modules));
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ASSERT_GE(modules.size(), 2u);
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const wchar_t kSelfName[] = L"\\crashpad_util_test.exe";
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ASSERT_GE(modules[0].name.size(), wcslen(kSelfName));
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EXPECT_EQ(kSelfName,
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modules[0].name.substr(modules[0].name.size() - wcslen(kSelfName)));
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ASSERT_GE(modules[1].name.size(), wcslen(kNtdllName));
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EXPECT_EQ(
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kNtdllName,
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modules[1].name.substr(modules[1].name.size() - wcslen(kNtdllName)));
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EXPECT_EQ(modules[0].dll_base,
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reinterpret_cast<uintptr_t>(GetModuleHandle(nullptr)));
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EXPECT_EQ(modules[1].dll_base,
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reinterpret_cast<uintptr_t>(GetModuleHandle(L"ntdll.dll")));
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EXPECT_GT(modules[0].size, 0);
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EXPECT_GT(modules[1].size, 0);
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EXPECT_EQ(modules[0].timestamp,
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GetTimestampForModule(GetModuleHandle(nullptr)));
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// System modules are forced to particular stamps and the file header values
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// don't match the on-disk times. Just make sure we got some data here.
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EXPECT_GT(modules[1].timestamp, 0);
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// Find something we know is a code address and confirm expected memory
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// information settings.
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VerifyAddressInInCodePage(process_info,
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reinterpret_cast<WinVMAddress>(_ReturnAddress()));
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}
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void TestOtherProcess(const base::string16& directory_modification) {
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ProcessInfo process_info;
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UUID done_uuid(UUID::InitializeWithNewTag{});
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ScopedKernelHANDLE done(
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CreateEvent(nullptr, true, false, done_uuid.ToString16().c_str()));
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ASSERT_TRUE(done.get());
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base::FilePath test_executable = Paths::Executable();
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std::wstring child_test_executable =
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test_executable.DirName()
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.Append(directory_modification)
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.Append(test_executable.BaseName().RemoveFinalExtension().value() +
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L"_process_info_test_child.exe")
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.value();
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std::wstring args;
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AppendCommandLineArgument(done_uuid.ToString16(), &args);
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ChildLauncher child(child_test_executable, args);
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child.Start();
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// The child sends us a code address we can look up in the memory map.
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WinVMAddress code_address;
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CheckedReadFile(
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child.stdout_read_handle(), &code_address, sizeof(code_address));
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ASSERT_TRUE(process_info.Initialize(child.process_handle()));
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// Tell the test it's OK to shut down now that we've read our data.
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EXPECT_TRUE(SetEvent(done.get()));
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std::vector<ProcessInfo::Module> modules;
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EXPECT_TRUE(process_info.Modules(&modules));
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ASSERT_GE(modules.size(), 3u);
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std::wstring child_name = L"\\crashpad_util_test_process_info_test_child.exe";
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ASSERT_GE(modules[0].name.size(), child_name.size());
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EXPECT_EQ(child_name,
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modules[0].name.substr(modules[0].name.size() - child_name.size()));
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ASSERT_GE(modules[1].name.size(), wcslen(kNtdllName));
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EXPECT_EQ(
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kNtdllName,
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modules[1].name.substr(modules[1].name.size() - wcslen(kNtdllName)));
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// lz32.dll is an uncommonly-used-but-always-available module that the test
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// binary manually loads.
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const wchar_t kLz32dllName[] = L"\\lz32.dll";
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ASSERT_GE(modules.back().name.size(), wcslen(kLz32dllName));
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EXPECT_EQ(kLz32dllName,
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modules.back().name.substr(modules.back().name.size() -
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wcslen(kLz32dllName)));
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VerifyAddressInInCodePage(process_info, code_address);
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}
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TEST(ProcessInfo, OtherProcess) {
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TestOtherProcess(FILE_PATH_LITERAL("."));
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}
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#if defined(ARCH_CPU_64_BITS)
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TEST(ProcessInfo, OtherProcessWOW64) {
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#ifndef NDEBUG
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TestOtherProcess(FILE_PATH_LITERAL("..\\..\\out\\Debug"));
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#else
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TestOtherProcess(FILE_PATH_LITERAL("..\\..\\out\\Release"));
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#endif
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}
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#endif // ARCH_CPU_64_BITS
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TEST(ProcessInfo, AccessibleRangesNone) {
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std::vector<ProcessInfo::MemoryInfo> memory_info;
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MEMORY_BASIC_INFORMATION mbi = {0};
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mbi.BaseAddress = 0;
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mbi.RegionSize = 10;
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mbi.State = MEM_FREE;
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memory_info.push_back(ProcessInfo::MemoryInfo(mbi));
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std::vector<CheckedRange<WinVMAddress, WinVMSize>> result =
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GetReadableRangesOfMemoryMap(CheckedRange<WinVMAddress, WinVMSize>(2, 4),
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memory_info);
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EXPECT_TRUE(result.empty());
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}
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TEST(ProcessInfo, AccessibleRangesOneInside) {
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std::vector<ProcessInfo::MemoryInfo> memory_info;
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MEMORY_BASIC_INFORMATION mbi = {0};
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mbi.BaseAddress = 0;
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mbi.RegionSize = 10;
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mbi.State = MEM_COMMIT;
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memory_info.push_back(ProcessInfo::MemoryInfo(mbi));
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std::vector<CheckedRange<WinVMAddress, WinVMSize>> result =
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GetReadableRangesOfMemoryMap(CheckedRange<WinVMAddress, WinVMSize>(2, 4),
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memory_info);
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ASSERT_EQ(1u, result.size());
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EXPECT_EQ(2, result[0].base());
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EXPECT_EQ(4, result[0].size());
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}
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TEST(ProcessInfo, AccessibleRangesOneTruncatedSize) {
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std::vector<ProcessInfo::MemoryInfo> memory_info;
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MEMORY_BASIC_INFORMATION mbi = {0};
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mbi.BaseAddress = 0;
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mbi.RegionSize = 10;
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mbi.State = MEM_COMMIT;
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memory_info.push_back(ProcessInfo::MemoryInfo(mbi));
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mbi.BaseAddress = reinterpret_cast<void*>(10);
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mbi.RegionSize = 20;
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mbi.State = MEM_FREE;
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memory_info.push_back(ProcessInfo::MemoryInfo(mbi));
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std::vector<CheckedRange<WinVMAddress, WinVMSize>> result =
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GetReadableRangesOfMemoryMap(CheckedRange<WinVMAddress, WinVMSize>(5, 10),
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memory_info);
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ASSERT_EQ(1u, result.size());
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EXPECT_EQ(5, result[0].base());
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EXPECT_EQ(5, result[0].size());
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}
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TEST(ProcessInfo, AccessibleRangesOneMovedStart) {
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std::vector<ProcessInfo::MemoryInfo> memory_info;
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MEMORY_BASIC_INFORMATION mbi = {0};
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mbi.BaseAddress = 0;
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mbi.RegionSize = 10;
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mbi.State = MEM_FREE;
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memory_info.push_back(ProcessInfo::MemoryInfo(mbi));
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mbi.BaseAddress = reinterpret_cast<void*>(10);
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mbi.RegionSize = 20;
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mbi.State = MEM_COMMIT;
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memory_info.push_back(ProcessInfo::MemoryInfo(mbi));
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std::vector<CheckedRange<WinVMAddress, WinVMSize>> result =
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GetReadableRangesOfMemoryMap(CheckedRange<WinVMAddress, WinVMSize>(5, 10),
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memory_info);
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ASSERT_EQ(1u, result.size());
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EXPECT_EQ(10, result[0].base());
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EXPECT_EQ(5, result[0].size());
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}
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TEST(ProcessInfo, ReserveIsInaccessible) {
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std::vector<ProcessInfo::MemoryInfo> memory_info;
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MEMORY_BASIC_INFORMATION mbi = {0};
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mbi.BaseAddress = 0;
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mbi.RegionSize = 10;
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mbi.State = MEM_RESERVE;
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memory_info.push_back(ProcessInfo::MemoryInfo(mbi));
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mbi.BaseAddress = reinterpret_cast<void*>(10);
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mbi.RegionSize = 20;
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mbi.State = MEM_COMMIT;
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memory_info.push_back(ProcessInfo::MemoryInfo(mbi));
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std::vector<CheckedRange<WinVMAddress, WinVMSize>> result =
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GetReadableRangesOfMemoryMap(CheckedRange<WinVMAddress, WinVMSize>(5, 10),
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memory_info);
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ASSERT_EQ(1u, result.size());
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EXPECT_EQ(10, result[0].base());
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EXPECT_EQ(5, result[0].size());
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}
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TEST(ProcessInfo, PageGuardIsInaccessible) {
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std::vector<ProcessInfo::MemoryInfo> memory_info;
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MEMORY_BASIC_INFORMATION mbi = {0};
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mbi.BaseAddress = 0;
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mbi.RegionSize = 10;
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mbi.State = MEM_COMMIT;
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mbi.Protect = PAGE_GUARD;
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memory_info.push_back(ProcessInfo::MemoryInfo(mbi));
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mbi.BaseAddress = reinterpret_cast<void*>(10);
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mbi.RegionSize = 20;
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mbi.State = MEM_COMMIT;
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mbi.Protect = 0;
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memory_info.push_back(ProcessInfo::MemoryInfo(mbi));
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std::vector<CheckedRange<WinVMAddress, WinVMSize>> result =
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GetReadableRangesOfMemoryMap(CheckedRange<WinVMAddress, WinVMSize>(5, 10),
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memory_info);
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ASSERT_EQ(1u, result.size());
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EXPECT_EQ(10, result[0].base());
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EXPECT_EQ(5, result[0].size());
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}
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TEST(ProcessInfo, PageNoAccessIsInaccessible) {
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std::vector<ProcessInfo::MemoryInfo> memory_info;
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MEMORY_BASIC_INFORMATION mbi = {0};
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mbi.BaseAddress = 0;
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mbi.RegionSize = 10;
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mbi.State = MEM_COMMIT;
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mbi.Protect = PAGE_NOACCESS;
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memory_info.push_back(ProcessInfo::MemoryInfo(mbi));
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mbi.BaseAddress = reinterpret_cast<void*>(10);
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mbi.RegionSize = 20;
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mbi.State = MEM_COMMIT;
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mbi.Protect = 0;
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memory_info.push_back(ProcessInfo::MemoryInfo(mbi));
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std::vector<CheckedRange<WinVMAddress, WinVMSize>> result =
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GetReadableRangesOfMemoryMap(CheckedRange<WinVMAddress, WinVMSize>(5, 10),
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memory_info);
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ASSERT_EQ(1u, result.size());
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EXPECT_EQ(10, result[0].base());
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EXPECT_EQ(5, result[0].size());
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}
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TEST(ProcessInfo, AccessibleRangesCoalesced) {
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std::vector<ProcessInfo::MemoryInfo> memory_info;
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MEMORY_BASIC_INFORMATION mbi = {0};
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mbi.BaseAddress = 0;
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mbi.RegionSize = 10;
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mbi.State = MEM_FREE;
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memory_info.push_back(ProcessInfo::MemoryInfo(mbi));
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mbi.BaseAddress = reinterpret_cast<void*>(10);
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mbi.RegionSize = 2;
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mbi.State = MEM_COMMIT;
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memory_info.push_back(ProcessInfo::MemoryInfo(mbi));
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mbi.BaseAddress = reinterpret_cast<void*>(12);
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mbi.RegionSize = 5;
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mbi.State = MEM_COMMIT;
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memory_info.push_back(ProcessInfo::MemoryInfo(mbi));
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std::vector<CheckedRange<WinVMAddress, WinVMSize>> result =
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GetReadableRangesOfMemoryMap(CheckedRange<WinVMAddress, WinVMSize>(11, 4),
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memory_info);
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ASSERT_EQ(1u, result.size());
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EXPECT_EQ(11, result[0].base());
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EXPECT_EQ(4, result[0].size());
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}
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TEST(ProcessInfo, AccessibleRangesMiddleUnavailable) {
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std::vector<ProcessInfo::MemoryInfo> memory_info;
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MEMORY_BASIC_INFORMATION mbi = {0};
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mbi.BaseAddress = 0;
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mbi.RegionSize = 10;
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mbi.State = MEM_COMMIT;
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memory_info.push_back(ProcessInfo::MemoryInfo(mbi));
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mbi.BaseAddress = reinterpret_cast<void*>(10);
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mbi.RegionSize = 5;
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mbi.State = MEM_FREE;
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memory_info.push_back(ProcessInfo::MemoryInfo(mbi));
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mbi.BaseAddress = reinterpret_cast<void*>(15);
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mbi.RegionSize = 100;
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mbi.State = MEM_COMMIT;
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memory_info.push_back(ProcessInfo::MemoryInfo(mbi));
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std::vector<CheckedRange<WinVMAddress, WinVMSize>> result =
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GetReadableRangesOfMemoryMap(CheckedRange<WinVMAddress, WinVMSize>(5, 45),
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memory_info);
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ASSERT_EQ(2u, result.size());
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EXPECT_EQ(5, result[0].base());
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EXPECT_EQ(5, result[0].size());
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EXPECT_EQ(15, result[1].base());
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EXPECT_EQ(35, result[1].size());
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}
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TEST(ProcessInfo, RequestedBeforeMap) {
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std::vector<ProcessInfo::MemoryInfo> memory_info;
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MEMORY_BASIC_INFORMATION mbi = {0};
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mbi.BaseAddress = reinterpret_cast<void*>(10);
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mbi.RegionSize = 10;
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mbi.State = MEM_COMMIT;
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memory_info.push_back(ProcessInfo::MemoryInfo(mbi));
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std::vector<CheckedRange<WinVMAddress, WinVMSize>> result =
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GetReadableRangesOfMemoryMap(CheckedRange<WinVMAddress, WinVMSize>(5, 10),
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memory_info);
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ASSERT_EQ(1u, result.size());
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EXPECT_EQ(10, result[0].base());
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EXPECT_EQ(5, result[0].size());
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}
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TEST(ProcessInfo, RequestedAfterMap) {
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std::vector<ProcessInfo::MemoryInfo> memory_info;
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MEMORY_BASIC_INFORMATION mbi = {0};
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mbi.BaseAddress = reinterpret_cast<void*>(10);
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mbi.RegionSize = 10;
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mbi.State = MEM_COMMIT;
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memory_info.push_back(ProcessInfo::MemoryInfo(mbi));
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std::vector<CheckedRange<WinVMAddress, WinVMSize>> result =
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GetReadableRangesOfMemoryMap(
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CheckedRange<WinVMAddress, WinVMSize>(15, 100), memory_info);
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ASSERT_EQ(1u, result.size());
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EXPECT_EQ(15, result[0].base());
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EXPECT_EQ(5, result[0].size());
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}
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TEST(ProcessInfo, ReadableRanges) {
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SYSTEM_INFO system_info;
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GetSystemInfo(&system_info);
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const size_t kBlockSize = system_info.dwPageSize;
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// Allocate 6 pages, and then commit the second, fourth, and fifth, and mark
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// two as committed, but PAGE_NOACCESS, so we have a setup like this:
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// 0 1 2 3 4 5
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// +-----------------------------------------------+
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// | ????? | | xxxxx | | | ????? |
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// +-----------------------------------------------+
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|
void* reserve_region =
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|
VirtualAlloc(nullptr, kBlockSize * 6, MEM_RESERVE, PAGE_READWRITE);
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ASSERT_TRUE(reserve_region);
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|
uintptr_t reserved_as_int = reinterpret_cast<uintptr_t>(reserve_region);
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|
void* readable1 =
|
|
VirtualAlloc(reinterpret_cast<void*>(reserved_as_int + kBlockSize),
|
|
kBlockSize,
|
|
MEM_COMMIT,
|
|
PAGE_READWRITE);
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|
ASSERT_TRUE(readable1);
|
|
void* readable2 =
|
|
VirtualAlloc(reinterpret_cast<void*>(reserved_as_int + (kBlockSize * 3)),
|
|
kBlockSize * 2,
|
|
MEM_COMMIT,
|
|
PAGE_READWRITE);
|
|
ASSERT_TRUE(readable2);
|
|
|
|
void* no_access =
|
|
VirtualAlloc(reinterpret_cast<void*>(reserved_as_int + (kBlockSize * 2)),
|
|
kBlockSize,
|
|
MEM_COMMIT,
|
|
PAGE_NOACCESS);
|
|
ASSERT_TRUE(no_access);
|
|
|
|
HANDLE current_process = GetCurrentProcess();
|
|
ProcessInfo info;
|
|
info.Initialize(current_process);
|
|
auto ranges = info.GetReadableRanges(
|
|
CheckedRange<WinVMAddress, WinVMSize>(reserved_as_int, kBlockSize * 6));
|
|
|
|
ASSERT_EQ(2u, ranges.size());
|
|
EXPECT_EQ(reserved_as_int + kBlockSize, ranges[0].base());
|
|
EXPECT_EQ(kBlockSize, ranges[0].size());
|
|
EXPECT_EQ(reserved_as_int + (kBlockSize * 3), ranges[1].base());
|
|
EXPECT_EQ(kBlockSize * 2, ranges[1].size());
|
|
|
|
// Also make sure what we think we can read corresponds with what we can
|
|
// actually read.
|
|
scoped_ptr<unsigned char[]> into(new unsigned char[kBlockSize * 6]);
|
|
SIZE_T bytes_read;
|
|
|
|
EXPECT_TRUE(ReadProcessMemory(
|
|
current_process, readable1, into.get(), kBlockSize, &bytes_read));
|
|
EXPECT_EQ(kBlockSize, bytes_read);
|
|
|
|
EXPECT_TRUE(ReadProcessMemory(
|
|
current_process, readable2, into.get(), kBlockSize * 2, &bytes_read));
|
|
EXPECT_EQ(kBlockSize * 2, bytes_read);
|
|
|
|
EXPECT_FALSE(ReadProcessMemory(
|
|
current_process, no_access, into.get(), kBlockSize, &bytes_read));
|
|
EXPECT_FALSE(ReadProcessMemory(
|
|
current_process, reserve_region, into.get(), kBlockSize, &bytes_read));
|
|
EXPECT_FALSE(ReadProcessMemory(current_process,
|
|
reserve_region,
|
|
into.get(),
|
|
kBlockSize * 6,
|
|
&bytes_read));
|
|
}
|
|
|
|
} // namespace
|
|
} // namespace test
|
|
} // namespace crashpad
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