comparison: src/crashCatcher.cc
src/crashCatcher.cc
- changeset 848
- 68410477c8bb
- parent 844
- 11587d419d2f
- child 855
- e16f1587ef44
equal
deleted
inserted
replaced
| 847:274a7fac44fc | 848:68410477c8bb |
|---|---|
| 27 #ifdef Q_OS_LINUX | 27 #ifdef Q_OS_LINUX |
| 28 # include <sys/prctl.h> | 28 # include <sys/prctl.h> |
| 29 #endif | 29 #endif |
| 30 | 30 |
| 31 // Is the crash catcher active now? | 31 // Is the crash catcher active now? |
| 32 static bool g_crashCatcherActive = false; | 32 static bool IsCrashCatcherActive = false; |
| 33 | 33 |
| 34 // If an assertion failed, what was it? | 34 // If an assertion failed, what was it? |
| 35 static QString g_assertionFailure; | 35 static QString AssertionFailureText; |
| 36 | 36 |
| 37 // List of signals to catch and crash on | 37 // List of signals to catch and crash on |
| 38 static QList<int> g_signalsToCatch ({ | 38 static QList<int> SignalsToCatch ({ |
| 39 SIGSEGV, // segmentation fault | 39 SIGSEGV, // segmentation fault |
| 40 SIGABRT, // abort() calls | 40 SIGABRT, // abort() calls |
| 41 SIGFPE, // floating point exceptions (e.g. division by zero) | 41 SIGFPE, // floating point exceptions (e.g. division by zero) |
| 42 SIGILL, // illegal instructions | 42 SIGILL, // illegal instructions |
| 43 }); | 43 }); |
| 44 | 44 |
| 45 // ------------------------------------------------------------------------------------------------- | |
| 45 // | 46 // |
| 46 // Removes the signal handler from SIGABRT and then aborts. | 47 // Removes the signal handler from SIGABRT and then aborts. |
| 47 // | 48 // |
| 48 static void finalAbort() | 49 static void FinalAbort() |
| 49 { | 50 { |
| 50 struct sigaction sighandler; | 51 struct sigaction sighandler; |
| 51 sighandler.sa_handler = SIG_DFL; | 52 sighandler.sa_handler = SIG_DFL; |
| 52 sighandler.sa_flags = 0; | 53 sighandler.sa_flags = 0; |
| 53 sigaction (SIGABRT, &sighandler, 0); | 54 sigaction (SIGABRT, &sighandler, 0); |
| 54 abort(); | 55 abort(); |
| 55 } | 56 } |
| 56 | 57 |
| 57 // ============================================================================= | 58 // ------------------------------------------------------------------------------------------------- |
| 58 // | 59 // |
| 59 static void handleCrash (int sig) | 60 static void HandleCrash (int sig) |
| 60 { | 61 { |
| 61 printf ("!! Caught signal %d, launching gdb\n", sig); | 62 printf ("!! Caught signal %d, launching gdb\n", sig); |
| 62 | 63 |
| 63 if (g_crashCatcherActive) | 64 if (IsCrashCatcherActive) |
| 64 { | 65 { |
| 65 printf ("Caught signal while crash catcher is active! Execution cannot continue.\n"); | 66 printf ("Caught signal while crash catcher is active! Execution cannot continue.\n"); |
| 66 finalAbort(); | 67 FinalAbort(); |
| 67 } | 68 } |
| 68 | 69 |
| 69 const pid_t pid = getpid(); | 70 pid_t const pid (getpid()); |
| 70 QProcess proc; | 71 QProcess proc; |
| 71 QTemporaryFile commandsFile; | 72 QTemporaryFile commandsFile; |
| 72 | 73 |
| 73 g_crashCatcherActive = true; | 74 IsCrashCatcherActive = true; |
| 74 | 75 |
| 75 if (commandsFile.open()) | 76 if (commandsFile.open()) |
| 76 { | 77 { |
| 77 commandsFile.write (format ("attach %1\n", pid).toLocal8Bit()); | 78 commandsFile.write (format ("attach %1\n", pid).toLocal8Bit()); |
| 78 commandsFile.write (QString ("backtrace full\n").toLocal8Bit()); | 79 commandsFile.write (QString ("backtrace full\n").toLocal8Bit()); |
| 89 #ifdef Q_OS_LINUX | 90 #ifdef Q_OS_LINUX |
| 90 prctl (PR_SET_PTRACER, proc.pid(), 0, 0, 0); | 91 prctl (PR_SET_PTRACER, proc.pid(), 0, 0, 0); |
| 91 #endif | 92 #endif |
| 92 | 93 |
| 93 proc.waitForFinished (1000); | 94 proc.waitForFinished (1000); |
| 94 QString output = QString (proc.readAllStandardOutput()); | 95 QString output (proc.readAllStandardOutput()); |
| 95 QString err = QString (proc.readAllStandardError()); | 96 QString err (proc.readAllStandardError()); |
| 96 QFile f (UNIXNAME "-crash.log"); | 97 QFile f (UNIXNAME "-crash.log"); |
| 97 | 98 |
| 98 if (f.open (QIODevice::WriteOnly)) | 99 if (f.open (QIODevice::WriteOnly)) |
| 99 { | 100 { |
| 100 fprint (f, format ("=== Program crashed with signal %1 ===\n\n%2" | 101 fprint (f, format ("=== Program crashed with signal %1 ===\n\n%2" |
| 101 "GDB stdout:\n%3\n" | 102 "GDB stdout:\n%3\nGDB stderr:\n%4\n", sig, |
| 102 "GDB stderr:\n%4\n", | 103 (not AssertionFailureText.isEmpty()) ? AssertionFailureText + "\n\n" : "", |
| 103 sig, (not g_assertionFailure.isEmpty()) ? g_assertionFailure + "\n\n" : "", output, err)); | 104 output, err)); |
| 104 f.close(); | 105 f.close(); |
| 105 } | 106 } |
| 106 | 107 |
| 107 if (g_assertionFailure.isEmpty()) | 108 if (not AssertionFailureText.isEmpty()) |
| 108 { | 109 printf ("Assertion failed: \"%s\".\n", qPrintable (AssertionFailureText)); |
| 109 printf ("Crashlog written to " UNIXNAME "-crash.log. Aborting.\n"); | |
| 110 } | |
| 111 else | |
| 112 { | |
| 113 printf ("Assertion failed: \"%s\". Backtrace written to " UNIXNAME "-crash.log.\n", | |
| 114 qPrintable (g_assertionFailure)); | |
| 115 } | |
| 116 | 110 |
| 117 finalAbort(); | 111 printf ("Backtrace written to " UNIXNAME "-crash.log. Aborting.\n"); |
| 112 FinalAbort(); | |
| 118 } | 113 } |
| 119 | 114 |
| 115 // ------------------------------------------------------------------------------------------------- | |
| 120 // | 116 // |
| 121 // Initializes the crash catcher. | 117 // Initializes the crash catcher. |
| 122 // | 118 // |
| 123 void initCrashCatcher() | 119 void InitCrashCatcher() |
| 124 { | 120 { |
| 125 struct sigaction sighandler; | 121 struct sigaction sighandler; |
| 126 sighandler.sa_handler = &handleCrash; | 122 sighandler.sa_handler = &HandleCrash; |
| 127 sighandler.sa_flags = 0; | 123 sighandler.sa_flags = 0; |
| 128 sigemptyset (&sighandler.sa_mask); | 124 sigemptyset (&sighandler.sa_mask); |
| 129 | 125 |
| 130 for (int sig : g_signalsToCatch) | 126 for (int sig : SignalsToCatch) |
| 131 { | 127 { |
| 132 if (sigaction (sig, &sighandler, null) == -1) | 128 if (sigaction (sig, &sighandler, null) == -1) |
| 133 { | 129 { |
| 134 fprint (stderr, "Couldn't set signal handler %1: %2", sig, strerror (errno)); | 130 fprint (stderr, "Couldn't set signal handler %1: %2", sig, strerror (errno)); |
| 135 g_signalsToCatch.removeOne (sig); | 131 SignalsToCatch.removeOne (sig); |
| 136 } | 132 } |
| 137 } | 133 } |
| 138 | 134 |
| 139 print ("Crash catcher hooked to signals: %1\n", g_signalsToCatch); | 135 print ("Crash catcher hooked to signals: %1\n", SignalsToCatch); |
| 140 } | 136 } |
| 141 | 137 |
| 142 #endif // #ifdef __unix__ | 138 #endif // #ifdef __unix__ |
| 143 | 139 |
| 144 // ============================================================================= | 140 // ------------------------------------------------------------------------------------------------- |
| 145 // | 141 // |
| 146 // This function must be readily available in both Windows and Linux. We display | 142 // This function catches an assertion failure. It must be readily available in both Windows and |
| 147 // the bomb box straight in Windows while in Linux we let abort() trigger the | 143 // Linux. We display the bomb box straight in Windows while in Linux we let abort() trigger |
| 148 // signal handler, which will cause the usual bomb box with GDB diagnostics. | 144 // the signal handler, which will cause the usual bomb box with GDB diagnostics. Said prompt will |
| 149 // Said prompt will embed the assertion failure information. | 145 // embed the assertion failure information. |
| 150 // | 146 // |
| 151 void assertionFailure (const char* file, int line, const char* funcname, const char* expr) | 147 void assertionFailure (const char* file, int line, const char* funcname, const char* expr) |
| 152 { | 148 { |
| 153 #ifdef __unix__ | 149 #ifdef __unix__ |
| 154 g_assertionFailure = format ("%1:%2: %3: %4", file, line, funcname, expr); | 150 AssertionFailureText = format ("%1:%2: %3: %4", file, line, funcname, expr); |
| 155 #else | 151 #else |
| 156 bombBox (format ( | 152 bombBox (format ( |
| 157 "<p><b>File</b>: <tt>%1</tt><br />" | 153 "<p><b>File</b>: <tt>%1</tt><br />" |
| 158 "<b>Line</b>: <tt>%2</tt><br />" | 154 "<b>Line</b>: <tt>%2</tt><br />" |
| 159 "<b>Function:</b> <tt>%3</tt></p>" | 155 "<b>Function:</b> <tt>%3</tt></p>" |
