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content / browser / utility_process_host_browsertest.cc [blame]
// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/utility_process_host.h"
#include <string_view>
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/memory/read_only_shared_memory_region.h"
#include "base/memory/unsafe_shared_memory_region.h"
#include "base/memory/writable_shared_memory_region.h"
#include "base/notreached.h"
#include "base/run_loop.h"
#include "base/strings/utf_string_conversions.h"
#include "base/test/scoped_feature_list.h"
#include "build/build_config.h"
#include "content/browser/child_process_launcher.h"
#include "content/browser/utility_sandbox_delegate.h"
#include "content/common/features.h"
#include "content/public/browser/browser_child_process_observer.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/child_process_data.h"
#include "content/public/browser/child_process_termination_info.h"
#include "content/public/common/content_client.h"
#include "content/public/common/content_features.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/zygote/zygote_buildflags.h"
#include "content/public/test/browser_test.h"
#include "content/public/test/content_browser_test.h"
#include "content/public/test/content_browser_test_utils.h"
#include "content/public/test/test_service.mojom.h"
#include "mojo/core/embedder/embedder.h"
#include "mojo/public/cpp/bindings/remote.h"
#if BUILDFLAG(IS_MAC) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
#include <sys/wait.h>
#endif
#if BUILDFLAG(IS_WIN)
#include <windows.h>
#include "sandbox/policy/mojom/sandbox.mojom.h"
#include "sandbox/win/src/sandbox_types.h"
#endif // BUILDFLAG(IS_WIN)
#if BUILDFLAG(USE_ZYGOTE)
#include "content/common/zygote/zygote_handle_impl_linux.h"
#include "content/public/common/zygote/zygote_handle.h"
#endif
#if BUILDFLAG(IS_MAC)
#include "base/apple/mach_port_rendezvous.h"
#endif
namespace content {
namespace {
const char kTestProcessName[] = "test_process";
constexpr std::string_view kTestMessage{"hello from shared memory"};
} // namespace
class UtilityProcessHostBrowserTest : public BrowserChildProcessObserver,
public ContentBrowserTest {
public:
void SetUpOnMainThread() override {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
BrowserChildProcessObserver::Add(this);
host_ = new UtilityProcessHost(); // Owned by a global list.
host_->SetName(u"TestProcess");
host_->SetMetricsName(kTestProcessName);
}
void TearDownOnMainThread() override {
// `host_` is about to be deleted during BrowserMainRunnerImpl::Shutdown().
host_ = nullptr;
}
void SetExpectFailLaunch() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
expect_failed_launch_ = true;
#if BUILDFLAG(IS_WIN)
// The Windows sandbox does not like the child process being a different
// process, so launch unsandboxed for the purpose of this test.
host_->SetSandboxType(sandbox::mojom::Sandbox::kNoSandbox);
#endif
// Simulate a catastrophic launch failure for all child processes by
// making the path to the process non-existent.
base::CommandLine::ForCurrentProcess()->AppendSwitchPath(
switches::kBrowserSubprocessPath,
base::FilePath(FILE_PATH_LITERAL("non_existent_path")));
}
void SetElevated() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
#if BUILDFLAG(IS_WIN)
host_->SetSandboxType(
sandbox::mojom::Sandbox::kNoSandboxAndElevatedPrivileges);
#else
NOTREACHED_IN_MIGRATION();
#endif
}
// After `service_` is bound, `run_test` is invoked, and then the RunLoop will
// run.
void RunUtilityProcess(base::OnceClosure run_test) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
base::RunLoop run_loop;
done_closure_ =
base::BindOnce(&UtilityProcessHostBrowserTest::DoneRunning,
base::Unretained(this), run_loop.QuitClosure());
EXPECT_TRUE(host_->Start());
host_->GetChildProcess()->BindServiceInterface(
service_.BindNewPipeAndPassReceiver());
std::move(run_test).Run();
run_loop.Run();
}
void RunCrashImmediatelyTest() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
expect_crashed_ = true;
service_->DoCrashImmediately(base::BindOnce(
&UtilityProcessHostBrowserTest::OnSomething, base::Unretained(this)));
}
void RunSharedMemoryHandleTest() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
// Verify that shared memory handles can be transferred to and from the
// elevated process. This is only supported with MojoIpcz enabled.
DCHECK(mojo::core::IsMojoIpczEnabled());
auto region = base::WritableSharedMemoryRegion::Create(kTestMessage.size());
auto mapping = region.Map();
memcpy(mapping.memory(), kTestMessage.data(), kTestMessage.size());
service_->CloneSharedMemoryContents(
base::WritableSharedMemoryRegion::ConvertToReadOnly(std::move(region)),
base::BindOnce(&UtilityProcessHostBrowserTest::OnMemoryCloneReceived,
base::Unretained(this)));
}
void RunBasicPingPongTest() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
service_->DoSomething(base::BindOnce(
&UtilityProcessHostBrowserTest::OnSomething, base::Unretained(this)));
}
#if BUILDFLAG(IS_POSIX) && !BUILDFLAG(IS_MAC)
void RunFileDescriptorStoreTest(base::ScopedFD read_fd) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
service_->WriteToPreloadedPipe();
char buf[4];
ASSERT_TRUE(base::ReadFromFD(read_fd.get(), buf));
std::string_view msg(buf, sizeof(buf));
ASSERT_EQ(msg, "test");
OnSomething();
}
#endif // BUILDFLAG(IS_POSIX) && !BUILDFLAG(IS_MAC)
protected:
void DoneRunning(base::OnceClosure quit_closure) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
BrowserChildProcessObserver::Remove(this);
base::CommandLine::ForCurrentProcess()->RemoveSwitch(
switches::kBrowserSubprocessPath);
EXPECT_EQ(expect_crashed_, has_crashed_);
EXPECT_EQ(expect_failed_launch_, has_failed_launch_);
std::move(quit_closure).Run();
}
void ResetService() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
service_.reset();
}
void OnSomething() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
// If service crashes then this never gets called.
ASSERT_EQ(false, expect_crashed_);
ResetService();
GetUIThreadTaskRunner({})->PostTask(FROM_HERE, std::move(done_closure_));
}
void OnMemoryCloneReceived(base::UnsafeSharedMemoryRegion region) {
auto mapping = region.Map();
ASSERT_EQ(kTestMessage.size(), mapping.size());
EXPECT_EQ(kTestMessage,
std::string_view(static_cast<const char*>(mapping.memory()),
kTestMessage.size()));
ResetService();
GetUIThreadTaskRunner({})->PostTask(FROM_HERE, std::move(done_closure_));
}
raw_ptr<UtilityProcessHost, AcrossTasksDanglingUntriaged> host_;
mojo::Remote<mojom::TestService> service_;
base::OnceClosure done_closure_;
bool expect_crashed_ = false;
bool expect_failed_launch_ = false;
// Access on UI thread.
bool has_crashed_ = false;
bool has_failed_launch_ = false;
private:
// content::BrowserChildProcessObserver implementation:
void BrowserChildProcessKilled(
const ChildProcessData& data,
const ChildProcessTerminationInfo& info) override {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
#if BUILDFLAG(IS_ANDROID)
// Android does not send crash notifications but sends kills. See comment in
// browser_child_process_observer.h.
BrowserChildProcessCrashed(data, info);
#else
FAIL() << "Killed notifications should only happen on Android.";
#endif
}
void BrowserChildProcessCrashed(
const ChildProcessData& data,
const ChildProcessTerminationInfo& info) override {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
#if BUILDFLAG(IS_WIN)
// See crbug.com/40861868#comment17. There are two implementations of the
// DoCrashImmediately mojo interface, which causes official build to return
// a different exit_code.
#if defined(OFFICIAL_BUILD)
EXPECT_EQ(STATUS_STACK_BUFFER_OVERRUN, static_cast<DWORD>(info.exit_code));
#else
EXPECT_EQ(EXCEPTION_BREAKPOINT, static_cast<DWORD>(info.exit_code));
#endif // defined(OFFICIAL_BUILD)
#elif BUILDFLAG(IS_MAC) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
EXPECT_TRUE(WIFSIGNALED(info.exit_code));
#if defined(OFFICIAL_BUILD)
EXPECT_EQ(SIGTRAP, WTERMSIG(info.exit_code));
#else // defined(OFFICIAL_BUILD)
EXPECT_EQ(SIGABRT, WTERMSIG(info.exit_code));
#endif // defined(OFFICIAL_BUILD)
#endif // BUILDFLAG(IS_MAC) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
EXPECT_EQ(kTestProcessName, data.metrics_name);
EXPECT_EQ(false, has_crashed_);
has_crashed_ = true;
ResetService();
std::move(done_closure_).Run();
}
void BrowserChildProcessLaunchFailed(
const ChildProcessData& data,
const ChildProcessTerminationInfo& info) override {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
EXPECT_EQ(info.status, base::TERMINATION_STATUS_LAUNCH_FAILED);
#if BUILDFLAG(IS_WIN)
// On Windows, the sandbox code handles all non-elevated process launches.
EXPECT_EQ(sandbox::SBOX_ERROR_CANNOT_LAUNCH_UNSANDBOXED_PROCESS,
info.exit_code);
// File not found because subprocess called 'non_existent_path.exe' does not
// exist.
EXPECT_EQ(DWORD{ERROR_FILE_NOT_FOUND}, info.last_error);
#else
EXPECT_EQ(LAUNCH_RESULT_FAILURE, info.exit_code);
#endif
EXPECT_EQ(kTestProcessName, data.metrics_name);
has_failed_launch_ = true;
ResetService();
std::move(done_closure_).Run();
}
};
IN_PROC_BROWSER_TEST_F(UtilityProcessHostBrowserTest, LaunchProcess) {
RunUtilityProcess(
base::BindOnce(&UtilityProcessHostBrowserTest::RunBasicPingPongTest,
base::Unretained(this)));
}
#if BUILDFLAG(IS_POSIX) && !BUILDFLAG(IS_MAC)
// TODO(crbug.com/40253015): Re-enable this test on Android when
// `files_to_preload` is actually fixed there.
// TODO(crbug.com/41484083): Re-enable this test on ChromeOS.
#if BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_CHROMEOS)
#define MAYBE_FileDescriptorStore DISABLED_FileDescriptorStore
#else
#define MAYBE_FileDescriptorStore FileDescriptorStore
#endif
IN_PROC_BROWSER_TEST_F(UtilityProcessHostBrowserTest,
MAYBE_FileDescriptorStore) {
// Tests whether base::FileDescriptorStore works in content by passing it a
// file descriptor for a pipe on launch. This test ensures the process is
// launched without a zygote.
#if BUILDFLAG(USE_ZYGOTE)
host_->SetZygoteForTesting(nullptr);
#endif
base::ScopedFD read_fd;
base::ScopedFD write_fd;
ASSERT_TRUE(base::CreatePipe(&read_fd, &write_fd));
host_->AddFileToPreload(mojom::kTestPipeKey, std::move(write_fd));
RunUtilityProcess(
base::BindOnce(&UtilityProcessHostBrowserTest::RunFileDescriptorStoreTest,
base::Unretained(this), std::move(read_fd)));
}
#endif // BUILDFLAG(IS_POSIX) && !BUILDFLAG(IS_MAC)
#if BUILDFLAG(IS_POSIX) && !BUILDFLAG(IS_MAC) && BUILDFLAG(USE_ZYGOTE)
IN_PROC_BROWSER_TEST_F(UtilityProcessHostBrowserTest,
FileDescriptorStoreWithUnsandboxedZygote) {
// Tests whether base::FileDescriptorStore works in content by passing it a
// file descriptor for a pipe on launch. This test ensures the process is
// launched with the unsandboxed zygote.
host_->SetZygoteForTesting(GetUnsandboxedZygote());
base::ScopedFD read_fd, write_fd;
ASSERT_TRUE(base::CreatePipe(&read_fd, &write_fd));
host_->AddFileToPreload(mojom::kTestPipeKey, std::move(write_fd));
RunUtilityProcess(
base::BindOnce(&UtilityProcessHostBrowserTest::RunFileDescriptorStoreTest,
base::Unretained(this), std::move(read_fd)));
}
IN_PROC_BROWSER_TEST_F(UtilityProcessHostBrowserTest,
FileDescriptorStoreWithGenericZygote) {
// Tests whether base::FileDescriptorStore works in content by passing it a
// file descriptor for a pipe on launch. This test ensures the process is
// launched with the generic zygote.
host_->SetZygoteForTesting(GetGenericZygote());
base::ScopedFD read_fd, write_fd;
ASSERT_TRUE(base::CreatePipe(&read_fd, &write_fd));
host_->AddFileToPreload(mojom::kTestPipeKey, std::move(write_fd));
RunUtilityProcess(
base::BindOnce(&UtilityProcessHostBrowserTest::RunFileDescriptorStoreTest,
base::Unretained(this), std::move(read_fd)));
}
#endif // BUILDFLAG(IS_POSIX) && !BUILDFLAG(IS_MAC) &&
// BUILDFLAG(USE_ZYGOTE)
// Disabled because it crashes on android-arm64-tests:
// https://crbug.com/1358585.
// TODO(crbug.com/41484083): Re-enable this test on ChromeOS.
#if !(BUILDFLAG(IS_ANDROID) && defined(ARCH_CPU_ARM64))
#if (BUILDFLAG(IS_LINUX) && defined(ARCH_CPU_X86_64)) || BUILDFLAG(IS_CHROMEOS)
#define MAYBE_LaunchProcessAndCrash DISABLED_LaunchProcessAndCrash
#else
#define MAYBE_LaunchProcessAndCrash LaunchProcessAndCrash
#endif
IN_PROC_BROWSER_TEST_F(UtilityProcessHostBrowserTest,
MAYBE_LaunchProcessAndCrash) {
RunUtilityProcess(
base::BindOnce(&UtilityProcessHostBrowserTest::RunCrashImmediatelyTest,
base::Unretained(this)));
}
#endif
// This test won't work as-is on POSIX platforms, where fork()+exec() is used to
// launch child processes, failure does not happen until exec(), therefore the
// test will see a valid child process followed by a
// TERMINATION_STATUS_ABNORMAL_TERMINATION of the forked process. However,
// posix_spawn() is used on macOS.
// See also ServiceProcessLauncherTest.FailToLaunchProcess.
#if !BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_MAC)
IN_PROC_BROWSER_TEST_F(UtilityProcessHostBrowserTest, FailToLaunchProcess) {
SetExpectFailLaunch();
// If the ping-pong test completes, the test will fail because that means the
// process did not fail to launch.
RunUtilityProcess(
base::BindOnce(&UtilityProcessHostBrowserTest::RunBasicPingPongTest,
base::Unretained(this)));
}
#endif // !BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_MAC)
#if BUILDFLAG(IS_WIN)
IN_PROC_BROWSER_TEST_F(UtilityProcessHostBrowserTest, LaunchElevatedProcess) {
SetElevated();
RunUtilityProcess(
mojo::core::IsMojoIpczEnabled()
? base::BindOnce(
&UtilityProcessHostBrowserTest::RunSharedMemoryHandleTest,
base::Unretained(this))
: base::BindOnce(&UtilityProcessHostBrowserTest::RunBasicPingPongTest,
base::Unretained(this)));
}
// Disabled because currently this causes a WER dialog to appear.
IN_PROC_BROWSER_TEST_F(UtilityProcessHostBrowserTest,
DISABLED_LaunchElevatedProcessAndCrash) {
SetElevated();
RunUtilityProcess(
base::BindOnce(&UtilityProcessHostBrowserTest::RunCrashImmediatelyTest,
base::Unretained(this)));
}
#endif // BUILDFLAG(IS_WIN)
#if BUILDFLAG(IS_MAC)
// Ensure that the network service launches and can establish Mojo IPC
// connections when peer requirements are being enforced. Since browser tests
// are run in an unsigned process this will exercise most of the mechanism, but
// code signature validation will be skipped.
class NetworkServiceProcessIdentityTest : public UtilityProcessHostBrowserTest {
public:
void SetUp() override {
scoped_feature_list_.InitWithFeatures(
{base::kMachPortRendezvousEnforcePeerRequirements,
features::kValidateNetworkServiceProcessIdentity},
{});
UtilityProcessHostBrowserTest::SetUp();
}
private:
base::test::ScopedFeatureList scoped_feature_list_;
};
IN_PROC_BROWSER_TEST_F(NetworkServiceProcessIdentityTest, LaunchService) {
// The process requirement is applied to the network service based on its
// sandbox type.
host_->SetSandboxType(sandbox::mojom::Sandbox::kNetwork);
RunUtilityProcess(
base::BindOnce(&UtilityProcessHostBrowserTest::RunBasicPingPongTest,
base::Unretained(this)));
}
#endif
} // namespace content