1 // Copyright 2021 The Chromium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "components/metrics/content/content_stability_metrics_provider.h"
6
7 #include <string>
8
9 #include "base/command_line.h"
10 #include "base/files/file_path.h"
11 #include "base/functional/callback.h"
12 #include "base/metrics/histogram.h"
13 #include "base/test/metrics/histogram_tester.h"
14 #include "build/build_config.h"
15 #include "components/metrics/content/extensions_helper.h"
16 #include "components/prefs/testing_pref_service.h"
17 #include "components/variations/hashing.h"
18 #include "content/public/browser/browser_child_process_observer.h"
19 #include "content/public/browser/child_process_data.h"
20 #include "content/public/browser/service_process_host.h"
21 #include "content/public/common/content_switches.h"
22 #include "content/public/test/browser_test.h"
23 #include "content/public/test/browser_test_base.h"
24 #include "content/public/test/content_browser_test.h"
25 #include "content/public/test/content_browser_test_utils.h"
26 #include "content/public/test/test_service.mojom.h"
27 #include "sandbox/policy/mojom/sandbox.mojom.h"
28
29 #if BUILDFLAG(IS_WIN)
30 #include <windows.h>
31
32 #include "sandbox/win/src/sandbox_types.h"
33 #endif
34
35 namespace content {
36
37 template <>
GetServiceSandboxType()38 sandbox::mojom::Sandbox GetServiceSandboxType<content::mojom::TestService>() {
39 // On Windows, the sandbox does not like having a different binary name
40 // 'non_existent_path' from the browser process, so set no sandbox here.
41 #if BUILDFLAG(IS_WIN)
42 return sandbox::mojom::Sandbox::kNoSandbox;
43 #else
44 return sandbox::mojom::Sandbox::kService;
45 #endif
46 }
47
48 } // namespace content
49
50 namespace metrics {
51
52 class ContentStabilityProviderBrowserTest
53 : public content::ContentBrowserTest,
54 content::BrowserChildProcessObserver {
55 public:
56 // Either the process launched, or did not launch. Both cause the run_loop to
57 // terminate.
BrowserChildProcessLaunchFailed(const content::ChildProcessData & data,const content::ChildProcessTerminationInfo & info)58 void BrowserChildProcessLaunchFailed(
59 const content::ChildProcessData& data,
60 const content::ChildProcessTerminationInfo& info) override {
61 if (data.metrics_name == content::mojom::TestService::Name_)
62 std::move(done_closure_).Run();
63 }
64
BrowserChildProcessLaunchedAndConnected(const content::ChildProcessData & data)65 void BrowserChildProcessLaunchedAndConnected(
66 const content::ChildProcessData& data) override {
67 if (data.metrics_name == content::mojom::TestService::Name_)
68 std::move(done_closure_).Run();
69 }
70
71 protected:
AddObserver()72 void AddObserver() { content::BrowserChildProcessObserver::Add(this); }
73
RemoveObserver()74 void RemoveObserver() { content::BrowserChildProcessObserver::Remove(this); }
75
76 base::OnceClosure done_closure_;
77 TestingPrefServiceSimple prefs_;
78 };
79
IN_PROC_BROWSER_TEST_F(ContentStabilityProviderBrowserTest,FailedUtilityProcessLaunches)80 IN_PROC_BROWSER_TEST_F(ContentStabilityProviderBrowserTest,
81 FailedUtilityProcessLaunches) {
82 base::RunLoop run_loop;
83 done_closure_ = run_loop.QuitClosure();
84 AddObserver();
85
86 ContentStabilityMetricsProvider provider(&prefs_, nullptr);
87 base::HistogramTester histogram_tester;
88
89 // Simulate a catastrophic utility process launch failure by specifying a bad
90 // path.
91 base::CommandLine::ForCurrentProcess()->AppendSwitchPath(
92 switches::kBrowserSubprocessPath,
93 base::FilePath(FILE_PATH_LITERAL("non_existent_path")));
94 mojo::Remote<content::mojom::TestService> test_service;
95 content::ServiceProcessHost::Launch(
96 test_service.BindNewPipeAndPassReceiver());
97
98 // run_loop runs until either the process launches or fails to launch.
99 run_loop.Run();
100
101 RemoveObserver();
102
103 histogram_tester.ExpectUniqueSample(
104 "ChildProcess.LaunchFailed.UtilityProcessHash",
105 variations::HashName(content::mojom::TestService::Name_), 1);
106 #if BUILDFLAG(IS_WIN)
107 int expected_error_code =
108 sandbox::SBOX_ERROR_CANNOT_LAUNCH_UNSANDBOXED_PROCESS;
109 #else
110 int expected_error_code =
111 1003; // content::LaunchResultCode::LAUNCH_RESULT_FAILURE.
112 #endif
113 histogram_tester.ExpectUniqueSample(
114 "ChildProcess.LaunchFailed.UtilityProcessErrorCode", expected_error_code,
115 1);
116
117 #if BUILDFLAG(IS_WIN)
118 // Last Error is only recorded on Windows.
119 histogram_tester.ExpectUniqueSample("ChildProcess.LaunchFailed.WinLastError",
120 DWORD{ERROR_FILE_NOT_FOUND}, 1);
121 #endif
122 }
123
124 } // namespace metrics
125