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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/metrics/content/content_stability_metrics_provider.h"
#include <string>
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/functional/callback.h"
#include "base/metrics/histogram.h"
#include "base/test/metrics/histogram_tester.h"
#include "base/test/scoped_feature_list.h"
#include "build/build_config.h"
#include "components/metrics/content/extensions_helper.h"
#include "components/prefs/testing_pref_service.h"
#include "components/variations/hashing.h"
#include "content/public/browser/browser_child_process_observer.h"
#include "content/public/browser/child_process_data.h"
#include "content/public/browser/child_process_termination_info.h"
#include "content/public/browser/service_process_host.h"
#include "content/public/common/content_features.h"
#include "content/public/common/content_switches.h"
#include "content/public/test/browser_test.h"
#include "content/public/test/browser_test_base.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 "sandbox/policy/mojom/sandbox.mojom.h"
#if BUILDFLAG(IS_WIN)
#include <windows.h>
#include "sandbox/win/src/sandbox_types.h"
#endif
namespace content {
template <>
sandbox::mojom::Sandbox GetServiceSandboxType<content::mojom::TestService>() {
// On Windows, the sandbox does not like having a different binary name
// 'non_existent_path' from the browser process, so set no sandbox here.
#if BUILDFLAG(IS_WIN)
return sandbox::mojom::Sandbox::kNoSandbox;
#else
return sandbox::mojom::Sandbox::kService;
#endif
}
} // namespace content
namespace metrics {
class ContentStabilityProviderBrowserTest
: public content::ContentBrowserTest,
content::BrowserChildProcessObserver {
public:
ContentStabilityProviderBrowserTest() {
feature_list_.InitAndDisableFeature(
features::kSpareRendererForSitePerProcess);
}
// Either the process launched, or did not launch. Both cause the run_loop to
// terminate.
void BrowserChildProcessLaunchFailed(
const content::ChildProcessData& data,
const content::ChildProcessTerminationInfo& info) override {
if (data.metrics_name == content::mojom::TestService::Name_)
std::move(done_closure_).Run();
}
void BrowserChildProcessLaunchedAndConnected(
const content::ChildProcessData& data) override {
if (data.metrics_name == content::mojom::TestService::Name_)
std::move(done_closure_).Run();
}
protected:
void AddObserver() { content::BrowserChildProcessObserver::Add(this); }
void RemoveObserver() { content::BrowserChildProcessObserver::Remove(this); }
base::OnceClosure done_closure_;
TestingPrefServiceSimple prefs_;
base::test::ScopedFeatureList feature_list_;
};
IN_PROC_BROWSER_TEST_F(ContentStabilityProviderBrowserTest,
FailedUtilityProcessLaunches) {
base::RunLoop run_loop;
done_closure_ = run_loop.QuitClosure();
AddObserver();
ContentStabilityMetricsProvider provider(&prefs_, nullptr);
base::HistogramTester histogram_tester;
// Simulate a catastrophic utility process launch failure by specifying a bad
// path.
base::CommandLine::ForCurrentProcess()->AppendSwitchPath(
switches::kBrowserSubprocessPath,
base::FilePath(FILE_PATH_LITERAL("non_existent_path")));
mojo::Remote<content::mojom::TestService> test_service;
content::ServiceProcessHost::Launch(
test_service.BindNewPipeAndPassReceiver());
// run_loop runs until either the process launches or fails to launch.
run_loop.Run();
RemoveObserver();
histogram_tester.ExpectUniqueSample(
"ChildProcess.LaunchFailed.UtilityProcessHash",
variations::HashName(content::mojom::TestService::Name_), 1);
#if BUILDFLAG(IS_WIN)
int expected_error_code =
sandbox::SBOX_ERROR_CANNOT_LAUNCH_UNSANDBOXED_PROCESS;
#else
int expected_error_code =
1003; // content::LaunchResultCode::LAUNCH_RESULT_FAILURE.
#endif
histogram_tester.ExpectUniqueSample(
"ChildProcess.LaunchFailed.UtilityProcessErrorCode", expected_error_code,
1);
#if BUILDFLAG(IS_WIN)
// Last Error is only recorded on Windows.
histogram_tester.ExpectUniqueSample("ChildProcess.LaunchFailed.WinLastError",
DWORD{ERROR_FILE_NOT_FOUND}, 1);
#endif
}
// Class to execute a closure after we observer a renderer process launch or
// launch failure.
class RenderProcessCreationObserver
: content::RenderProcessHostCreationObserver {
public:
RenderProcessCreationObserver(base::OnceClosure done_closure)
: done_closure_(std::move(done_closure)) {}
~RenderProcessCreationObserver() override = default;
void OnRenderProcessHostCreated(
content::RenderProcessHost* process_host) override {
if (done_closure_) {
std::move(done_closure_).Run();
}
}
void OnRenderProcessHostCreationFailed(
content::RenderProcessHost* host,
const content::ChildProcessTerminationInfo& info) override {
ASSERT_EQ(base::TERMINATION_STATUS_LAUNCH_FAILED, info.status);
if (done_closure_) {
std::move(done_closure_).Run();
}
}
private:
base::OnceClosure done_closure_;
};
IN_PROC_BROWSER_TEST_F(ContentStabilityProviderBrowserTest,
FailedRendererProcessLaunches) {
base::RunLoop run_loop;
ContentStabilityMetricsProvider provider(&prefs_, nullptr);
base::HistogramTester histogram_tester;
{
RenderProcessCreationObserver renderer_observer(run_loop.QuitClosure());
// Simulate a catastrophic renderer process launch failure by specifying a
// bad path.
base::CommandLine::ForCurrentProcess()->AppendSwitchPath(
switches::kBrowserSubprocessPath,
base::FilePath(FILE_PATH_LITERAL("non_existent_path")));
ASSERT_FALSE(content::NavigateToURL(shell(), GURL("about:blank")));
// run_loop runs until either the process launches or fails to launch.
run_loop.Run();
}
histogram_tester.ExpectUniqueSample(
"BrowserRenderProcessHost.ChildLaunchFailures",
1 /* CoarseRendererType::kRenderer */, 1);
#if BUILDFLAG(IS_WIN)
int expected_error_code = sandbox::SBOX_ERROR_CREATE_PROCESS;
#else
int expected_error_code =
1003; // content::LaunchResultCode::LAUNCH_RESULT_FAILURE.
#endif
histogram_tester.ExpectUniqueSample(
"BrowserRenderProcessHost.ChildLaunchFailureCodes", expected_error_code,
1);
histogram_tester.ExpectBucketCount(
"Stability.Counts2", StabilityEventType::kRendererFailedLaunch, 1);
}
} // namespace metrics
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