1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #import "components/crash/app/breakpad_mac.h"
7 #include <CoreFoundation/CoreFoundation.h>
8 #import <Foundation/Foundation.h>
10 #include "base/auto_reset.h"
11 #include "base/base_switches.h"
12 #import "base/basictypes.h"
13 #include "base/command_line.h"
14 #include "base/debug/crash_logging.h"
15 #include "base/debug/dump_without_crashing.h"
16 #include "base/files/file_path.h"
17 #include "base/files/file_util.h"
18 #import "base/logging.h"
19 #include "base/mac/bundle_locations.h"
20 #include "base/mac/mac_util.h"
21 #include "base/mac/scoped_cftyperef.h"
22 #import "base/mac/scoped_nsautorelease_pool.h"
23 #include "base/strings/sys_string_conversions.h"
24 #include "base/threading/platform_thread.h"
25 #include "base/threading/thread_restrictions.h"
26 #import "breakpad/src/client/mac/Framework/Breakpad.h"
27 #include "components/crash/app/crash_reporter_client.h"
29 using crash_reporter::GetCrashReporterClient;
35 BreakpadRef gBreakpadRef = NULL;
37 void SetCrashKeyValue(NSString* key, NSString* value) {
38 // Comment repeated from header to prevent confusion:
39 // IMPORTANT: On OS X, the key/value pairs are sent to the crash server
40 // out of bounds and not recorded on disk in the minidump, this means
41 // that if you look at the minidump file locally you won't see them!
42 if (gBreakpadRef == NULL) {
46 BreakpadAddUploadParameter(gBreakpadRef, key, value);
49 void ClearCrashKeyValue(NSString* key) {
50 if (gBreakpadRef == NULL) {
54 BreakpadRemoveUploadParameter(gBreakpadRef, key);
57 void SetCrashKeyValueImpl(const base::StringPiece& key,
58 const base::StringPiece& value) {
59 SetCrashKeyValue(base::SysUTF8ToNSString(key.as_string()),
60 base::SysUTF8ToNSString(value.as_string()));
63 void ClearCrashKeyValueImpl(const base::StringPiece& key) {
64 ClearCrashKeyValue(base::SysUTF8ToNSString(key.as_string()));
67 bool FatalMessageHandler(int severity, const char* file, int line,
68 size_t message_start, const std::string& str) {
69 // Do not handle non-FATAL.
70 if (severity != logging::LOG_FATAL)
73 // In case of OOM condition, this code could be reentered when
74 // constructing and storing the key. Using a static is not
75 // thread-safe, but if multiple threads are in the process of a
76 // fatal crash at the same time, this should work.
77 static bool guarded = false;
81 base::AutoReset<bool> guard(&guarded, true);
83 // Only log last path component. This matches logging.cc.
85 const char* slash = strrchr(file, '/');
90 NSString* fatal_key = @"LOG_FATAL";
91 NSString* fatal_value =
92 [NSString stringWithFormat:@"%s:%d: %s",
93 file, line, str.c_str() + message_start];
94 SetCrashKeyValue(fatal_key, fatal_value);
96 // Rather than including the code to force the crash here, allow the
101 // BreakpadGenerateAndSendReport() does not report the current
102 // thread. This class can be used to spin up a thread to run it.
103 class DumpHelper : public base::PlatformThread::Delegate {
105 static void DumpWithoutCrashing() {
107 base::PlatformThreadHandle handle;
108 if (base::PlatformThread::Create(0, &dumper, &handle)) {
109 // The entire point of this is to block so that the correct
111 base::ThreadRestrictions::ScopedAllowIO allow_io;
112 base::PlatformThread::Join(handle);
119 void ThreadMain() override {
120 base::PlatformThread::SetName("CrDumpHelper");
121 BreakpadGenerateAndSendReport(gBreakpadRef);
124 DISALLOW_COPY_AND_ASSIGN(DumpHelper);
127 void SIGABRTHandler(int signal) {
128 // The OSX abort() (link below) masks all signals for the process,
129 // and all except SIGABRT for the thread. SIGABRT will be masked
130 // when the SIGABRT is sent, which means at this point only SIGKILL
131 // and SIGSTOP can be delivered. Unmask others so that the code
132 // below crashes as desired.
134 // http://www.opensource.apple.com/source/Libc/Libc-825.26/stdlib/FreeBSD/abort.c
137 sigaddset(&mask, signal);
138 pthread_sigmask(SIG_SETMASK, &mask, NULL);
140 // Most interesting operations are not safe in a signal handler, just crash.
141 char* volatile death_ptr = NULL;
147 bool IsCrashReporterEnabled() {
148 return gBreakpadRef != NULL;
151 // Only called for a branded build of Chrome.app.
152 void InitCrashReporter(const std::string& process_type) {
153 DCHECK(!gBreakpadRef);
154 base::mac::ScopedNSAutoreleasePool autorelease_pool;
156 // Check whether crash reporting should be enabled. If enterprise
157 // configuration management controls crash reporting, it takes precedence.
158 // Otherwise, check whether the user has consented to stats and crash
159 // reporting. The browser process can make this determination directly.
160 // Helper processes may not have access to the disk or to the same data as
161 // the browser process, so the browser passes the decision to them on the
163 NSBundle* main_bundle = base::mac::FrameworkBundle();
164 bool is_browser = !base::mac::IsBackgroundOnlyProcess();
165 bool enable_breakpad = false;
166 CommandLine* command_line = CommandLine::ForCurrentProcess();
169 // Since the configuration management infrastructure is possibly not
170 // initialized when this code runs, read the policy preference directly.
171 if (!GetCrashReporterClient()->ReportingIsEnforcedByPolicy(
173 // Controlled by the user. The crash reporter may be enabled by
174 // preference or through an environment variable, but the kDisableBreakpad
175 // switch overrides both.
176 enable_breakpad = GetCrashReporterClient()->GetCollectStatsConsent() ||
177 GetCrashReporterClient()->IsRunningUnattended();
178 enable_breakpad &= !command_line->HasSwitch(switches::kDisableBreakpad);
181 // This is a helper process, check the command line switch.
182 enable_breakpad = command_line->HasSwitch(switches::kEnableCrashReporter);
185 if (!enable_breakpad) {
186 VLOG_IF(1, is_browser) << "Breakpad disabled";
190 // Tell Breakpad where crash_inspector and crash_report_sender are.
191 NSString* resource_path = [main_bundle resourcePath];
192 NSString *inspector_location =
193 [resource_path stringByAppendingPathComponent:@"crash_inspector"];
194 NSString *reporter_bundle_location =
195 [resource_path stringByAppendingPathComponent:@"crash_report_sender.app"];
196 NSString *reporter_location =
197 [[NSBundle bundleWithPath:reporter_bundle_location] executablePath];
199 if (!inspector_location || !reporter_location) {
200 VLOG_IF(1, is_browser && base::mac::AmIBundled()) << "Breakpad disabled";
204 NSDictionary* info_dictionary = [main_bundle infoDictionary];
205 NSMutableDictionary *breakpad_config =
206 [[info_dictionary mutableCopy] autorelease];
207 [breakpad_config setObject:inspector_location
208 forKey:@BREAKPAD_INSPECTOR_LOCATION];
209 [breakpad_config setObject:reporter_location
210 forKey:@BREAKPAD_REPORTER_EXE_LOCATION];
212 // In the main application (the browser process), crashes can be passed to
213 // the system's Crash Reporter. This allows the system to notify the user
214 // when the application crashes, and provide the user with the option to
217 [breakpad_config setObject:@"NO" forKey:@BREAKPAD_SEND_AND_EXIT];
219 base::FilePath dir_crash_dumps;
220 GetCrashReporterClient()->GetCrashDumpLocation(&dir_crash_dumps);
221 [breakpad_config setObject:base::SysUTF8ToNSString(dir_crash_dumps.value())
222 forKey:@BREAKPAD_DUMP_DIRECTORY];
224 // Temporarily run Breakpad in-process on 10.10 and later because APIs that
225 // it depends on got broken (http://crbug.com/386208).
226 // This can catch crashes in the browser process only.
227 if (is_browser && base::mac::IsOSYosemiteOrLater()) {
228 [breakpad_config setObject:[NSNumber numberWithBool:YES]
229 forKey:@BREAKPAD_IN_PROCESS];
232 // Initialize Breakpad.
233 gBreakpadRef = BreakpadCreate(breakpad_config);
235 LOG_IF(ERROR, base::mac::AmIBundled()) << "Breakpad initializaiton failed";
239 // Initialize the scoped crash key system.
240 base::debug::SetCrashKeyReportingFunctions(&SetCrashKeyValueImpl,
241 &ClearCrashKeyValueImpl);
242 GetCrashReporterClient()->RegisterCrashKeys();
244 // Set Breakpad metadata values. These values are added to Info.plist during
245 // the branded Google Chrome.app build.
246 SetCrashKeyValue(@"ver", [info_dictionary objectForKey:@BREAKPAD_VERSION]);
247 SetCrashKeyValue(@"prod", [info_dictionary objectForKey:@BREAKPAD_PRODUCT]);
248 SetCrashKeyValue(@"plat", @"OS X");
251 // Get the guid from the command line switch.
252 std::string client_guid =
253 command_line->GetSwitchValueASCII(switches::kEnableCrashReporter);
254 GetCrashReporterClient()->SetCrashReporterClientIdFromGUID(client_guid);
257 logging::SetLogMessageHandler(&FatalMessageHandler);
258 base::debug::SetDumpWithoutCrashingFunction(&DumpHelper::DumpWithoutCrashing);
260 // abort() sends SIGABRT, which breakpad does not intercept.
261 // Register a signal handler to crash in a way breakpad will
263 struct sigaction sigact;
264 memset(&sigact, 0, sizeof(sigact));
265 sigact.sa_handler = SIGABRTHandler;
266 CHECK(0 == sigaction(SIGABRT, &sigact, NULL));
269 void InitCrashProcessInfo(const std::string& process_type_switch) {
270 if (gBreakpadRef == NULL) {
274 // Determine the process type.
275 NSString* process_type = @"browser";
276 if (!process_type_switch.empty()) {
277 process_type = base::SysUTF8ToNSString(process_type_switch);
280 GetCrashReporterClient()->InstallAdditionalFilters(gBreakpadRef);
282 // Store process type in crash dump.
283 SetCrashKeyValue(@"ptype", process_type);
285 NSString* pid_value =
286 [NSString stringWithFormat:@"%d", static_cast<unsigned int>(getpid())];
287 SetCrashKeyValue(@"pid", pid_value);
290 } // namespace breakpad