Sun, 22 Jun 2014 14:51:41 +0300
- transitioned from git to hg
- changed updaterevision.c to the one from Zandronum as it works with hg (things need revising though..)
/* * LDForge: LDraw parts authoring CAD * Copyright (C) 2013, 2014 Santeri Piippo * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #ifdef __unix__ #include <QProcess> #include <QTemporaryFile> #include <unistd.h> #include <signal.h> #include "crashCatcher.h" #ifdef Q_OS_LINUX # include <sys/prctl.h> #endif // Is the crash catcher active now? static bool g_crashCatcherActive = false; // If an assertion failed, what was it? static QString g_assertionFailure; // List of signals to catch and crash on static QList<int> g_signalsToCatch ({ SIGSEGV, // segmentation fault SIGABRT, // abort() calls SIGFPE, // floating point exceptions (e.g. division by zero) SIGILL, // illegal instructions }); // // Removes the signal handler from SIGABRT and then aborts. // static void finalAbort() { struct sigaction sighandler; sighandler.sa_handler = SIG_DFL; sighandler.sa_flags = 0; sigaction (SIGABRT, &sighandler, 0); abort(); } // ============================================================================= // static void handleCrash (int sig) { printf ("!! Caught signal %d, launching gdb\n", sig); if (g_crashCatcherActive) { printf ("Caught signal while crash catcher is active! Execution cannot continue.\n"); finalAbort(); } const pid_t pid = getpid(); QProcess proc; QTemporaryFile commandsFile; g_crashCatcherActive = true; if (commandsFile.open()) { commandsFile.write (format ("attach %1\n", pid).toLocal8Bit()); commandsFile.write (QString ("backtrace full\n").toLocal8Bit()); commandsFile.write (QString ("detach\n").toLocal8Bit()); commandsFile.write (QString ("quit").toLocal8Bit()); commandsFile.close(); } proc.start ("gdb", {"-x", commandsFile.fileName()}); // Linux doesn't allow ptrace to be used on anything but direct child processes // so we need to use prctl to register an exception to this to allow GDB attach to us. // We need to do this now and no earlier because only now we actually know GDB's PID. #ifdef Q_OS_LINUX prctl (PR_SET_PTRACER, proc.pid(), 0, 0, 0); #endif proc.waitForFinished (1000); QString output = QString (proc.readAllStandardOutput()); QString err = QString (proc.readAllStandardError()); QFile f (UNIXNAME "-crash.log"); if (f.open (QIODevice::WriteOnly)) { fprint (f, format ("=== Program crashed with signal %1 ===\n\n%2" "GDB stdout:\n%3\n" "GDB stderr:\n%4\n", sig, (not g_assertionFailure.isEmpty()) ? g_assertionFailure + "\n\n" : "", output, err)); f.close(); } if (g_assertionFailure.isEmpty()) { printf ("Crashlog written to " UNIXNAME "-crash.log. Aborting.\n"); } else { printf ("Assertion failed: \"%s\". Backtrace written to " UNIXNAME "-crash.log.\n", qPrintable (g_assertionFailure)); } finalAbort(); } // // Initializes the crash catcher. // void initCrashCatcher() { struct sigaction sighandler; sighandler.sa_handler = &handleCrash; sighandler.sa_flags = 0; sigemptyset (&sighandler.sa_mask); for (int sig : g_signalsToCatch) { if (sigaction (sig, &sighandler, null) == -1) { fprint (stderr, "Couldn't set signal handler %1: %2", sig, strerror (errno)); g_signalsToCatch.removeOne (sig); } } print ("Crash catcher hooked to signals: %1\n", g_signalsToCatch); } #endif // #ifdef __unix__ // ============================================================================= // // This function must be readily available in both Windows and Linux. We display // the bomb box straight in Windows while in Linux we let abort() trigger the // signal handler, which will cause the usual bomb box with GDB diagnostics. // Said prompt will embed the assertion failure information. // void assertionFailure (const char* file, int line, const char* funcname, const char* expr) { #ifdef __unix__ g_assertionFailure = format ("%1:%2: %3: %4", file, line, funcname, expr); #else bombBox (format ( "<p><b>File</b>: <tt>%1</tt><br />" "<b>Line</b>: <tt>%2</tt><br />" "<b>Function:</b> <tt>%3</tt></p>" "<p>Assertion <b><tt>`%4'</tt></b> failed.</p>", file, line, funcname, expr)); #endif abort(); }