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// Copyright (c) 2011 The Chromium 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 "base/stringprintf.h"
#include "base/win/scoped_handle.h"
#include "sandbox/src/handle_closer_agent.h"
#include "sandbox/src/sandbox.h"
#include "sandbox/src/sandbox_factory.h"
#include "sandbox/src/target_services.h"
#include "sandbox/tests/common/controller.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
const wchar_t *kFileExtensions[] = { L".1", L".2", L".3", L".4" };
// Returns a handle to a unique marker file that can be retrieved between runs.
HANDLE GetMarkerFile(const wchar_t *extension) {
wchar_t path_buffer[MAX_PATH + 1];
CHECK(::GetTempPath(MAX_PATH, path_buffer));
string16 marker_path = path_buffer;
marker_path += L"\\sbox_marker_";
// Generate a unique value from the exe's size and timestamp.
CHECK(::GetModuleFileName(NULL, path_buffer, MAX_PATH));
base::win::ScopedHandle module(::CreateFile(path_buffer,
FILE_READ_ATTRIBUTES, FILE_SHARE_READ, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL));
CHECK(module.IsValid());
FILETIME timestamp;
CHECK(::GetFileTime(module, ×tamp, NULL, NULL));
marker_path += base::StringPrintf(L"%08x%08x%08x",
::GetFileSize(module, NULL),
timestamp.dwLowDateTime,
timestamp.dwHighDateTime);
marker_path += extension;
// Make the file delete-on-close so cleanup is automatic.
return CreateFile(marker_path.c_str(), FILE_ALL_ACCESS,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
NULL, OPEN_ALWAYS, FILE_FLAG_DELETE_ON_CLOSE, NULL);
}
// Used by the thread pool tests.
HANDLE finish_event;
const int kWaitCount = 20;
} // namespace
namespace sandbox {
// Checks for the presence of a list of files (in object path form).
// Format: CheckForFileHandle (Y|N) \path\to\file1 [\path\to\file2 ...]
// - Y or N depending if the file should exist or not.
SBOX_TESTS_COMMAND int CheckForFileHandles(int argc, wchar_t **argv) {
if (argc < 2)
return SBOX_TEST_FAILED_TO_RUN_TEST;
bool should_find = argv[0][0] == L'Y';
if (argv[0][1] != L'\0' || !should_find && argv[0][0] != L'N')
return SBOX_TEST_FAILED_TO_RUN_TEST;
static int state = BEFORE_INIT;
switch (state++) {
case BEFORE_INIT:
// Create a unique marker file that is open while the test is running.
// The handles leak, but it will be closed by the test or on exit.
for (int i = 0; i < arraysize(kFileExtensions); ++i)
EXPECT_NE(GetMarkerFile(kFileExtensions[i]), INVALID_HANDLE_VALUE);
return SBOX_TEST_SUCCEEDED;
case AFTER_REVERT: {
// Brute force the handle table to find what we're looking for.
DWORD handle_count = UINT_MAX;
const int kInvalidHandleThreshold = 100;
const size_t kHandleOffset = sizeof(HANDLE);
HANDLE handle = NULL;
int invalid_count = 0;
string16 handle_name;
if (!::GetProcessHandleCount(::GetCurrentProcess(), &handle_count))
return SBOX_TEST_FAILED_TO_RUN_TEST;
while (handle_count && invalid_count < kInvalidHandleThreshold) {
reinterpret_cast<size_t&>(handle) += kHandleOffset;
if (GetHandleName(handle, &handle_name)) {
for (int i = 1; i < argc; ++i) {
if (handle_name == argv[i])
return should_find ? SBOX_TEST_SUCCEEDED : SBOX_TEST_FAILED;
}
--handle_count;
} else {
++invalid_count;
}
}
return should_find ? SBOX_TEST_FAILED : SBOX_TEST_SUCCEEDED;
}
default: // Do nothing.
break;
}
return SBOX_TEST_SUCCEEDED;
}
TEST(HandleCloserTest, CheckForMarkerFiles) {
TestRunner runner;
runner.SetTimeout(2000);
runner.SetTestState(EVERY_STATE);
sandbox::TargetPolicy* policy = runner.GetPolicy();
string16 command = string16(L"CheckForFileHandles Y");
for (int i = 0; i < arraysize(kFileExtensions); ++i) {
string16 handle_name;
base::win::ScopedHandle marker(GetMarkerFile(kFileExtensions[i]));
CHECK(marker.IsValid());
CHECK(sandbox::GetHandleName(marker, &handle_name));
command += (L" ");
command += handle_name;
}
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(command.c_str())) <<
"Failed: " << command;
}
TEST(HandleCloserTest, CloseMarkerFiles) {
TestRunner runner;
runner.SetTimeout(2000);
runner.SetTestState(EVERY_STATE);
sandbox::TargetPolicy* policy = runner.GetPolicy();
string16 command = string16(L"CheckForFileHandles N");
for (int i = 0; i < arraysize(kFileExtensions); ++i) {
string16 handle_name;
base::win::ScopedHandle marker(GetMarkerFile(kFileExtensions[i]));
CHECK(marker.IsValid());
CHECK(sandbox::GetHandleName(marker, &handle_name));
CHECK_EQ(policy->AddKernelObjectToClose(L"File", handle_name.c_str()),
SBOX_ALL_OK);
command += (L" ");
command += handle_name;
}
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(command.c_str())) <<
"Failed: " << command;
}
void WINAPI ThreadPoolTask(void* event, BOOLEAN timeout) {
static volatile LONG waiters_remaining = kWaitCount;
CHECK(!timeout);
CHECK(::CloseHandle(event));
if (::InterlockedDecrement(&waiters_remaining) == 0)
CHECK(::SetEvent(finish_event));
}
// Run a thread pool inside a sandbox without a CSRSS connection.
SBOX_TESTS_COMMAND int RunThreadPool(int argc, wchar_t **argv) {
HANDLE wait_list[20];
CHECK(finish_event = ::CreateEvent(NULL, TRUE, FALSE, NULL));
// Set up a bunch of waiters.
HANDLE pool = NULL;
for (int i = 0; i < kWaitCount; ++i) {
HANDLE event = ::CreateEvent(NULL, TRUE, FALSE, NULL);
CHECK(event);
CHECK(::RegisterWaitForSingleObject(&pool, event, ThreadPoolTask, event,
INFINITE, WT_EXECUTEONLYONCE));
wait_list[i] = event;
}
// Signal all the waiters.
for (int i = 0; i < kWaitCount; ++i)
CHECK(::SetEvent(wait_list[i]));
CHECK_EQ(::WaitForSingleObject(finish_event, INFINITE), WAIT_OBJECT_0);
CHECK(::CloseHandle(finish_event));
return SBOX_TEST_SUCCEEDED;
}
TEST(HandleCloserTest, RunThreadPool) {
TestRunner runner;
runner.SetTimeout(2000);
runner.SetTestState(AFTER_REVERT);
sandbox::TargetPolicy* policy = runner.GetPolicy();
// Sever the CSRSS connection by closing ALPC ports inside the sandbox.
CHECK_EQ(policy->AddKernelObjectToClose(L"ALPC Port", NULL), SBOX_ALL_OK);
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(L"RunThreadPool"));
}
} // namespace sandbox
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