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/*******************************************************************\ |
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|
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Copyright (C) 2004 Joseph Coffland |
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|
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This program is free software; you can redistribute it and/or |
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modify it under the terms of the GNU General Public License |
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as published by the Free Software Foundation; either version 2 |
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of the License, or (at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
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02111-1307, USA. |
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|
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For information regarding this software email |
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jcofflan@users.sourceforge.net |
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|
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\*******************************************************************/ |
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|
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#include <protomol/base/Exception.h> |
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|
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#ifdef HAVE_DEBUGGER |
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#include <protomol/debug/Debugger.h> |
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#include <protomol/debug/Process.h> |
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#include <protomol/type/String.h> |
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|
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#include <sys/time.h> |
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#include <sys/resource.h> |
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#include <unistd.h> |
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#include <sys/types.h> |
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#include <sys/wait.h> |
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#include <sys/stat.h> |
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#include <fcntl.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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|
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#include <sstream> |
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|
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using namespace std; |
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using namespace ProtoMol; |
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|
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string Debugger::executableName; |
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int Debugger::numTraces = 0; |
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bool Debugger::traceFiltering = true; |
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int Debugger::maxTraces = 10; |
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|
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void Debugger::initStackTrace(string executableName) { |
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Debugger::executableName = executableName; |
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Exception::enableStackTraces = true; |
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} |
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|
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bool Debugger::printStackTrace(ostream &stream) { |
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trace_t trace; |
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bool retVal = getStackTrace(trace); |
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|
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trace_t::iterator it; |
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for (it = trace.begin(); it != trace.end(); it++) |
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stream << *it << endl; |
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|
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return retVal; |
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} |
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|
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#define BUF_SIZE 2048 |
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|
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bool Debugger::_getStackTrace(trace_t &trace) { |
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if (executableName == "") { |
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trace.push_back("Stack Trace Error: Stack dumper not initialized!"); |
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return false; |
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} |
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|
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numTraces++; |
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if (maxTraces && numTraces > maxTraces) { |
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trace.push_back("Stack Trace Error: Exceeded maxTraces of " + |
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String(maxTraces)); |
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return false; |
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} |
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|
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// Spawn gdb process |
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int argc = 0; |
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const char *argv[5]; |
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|
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argv[argc++] = "gdb"; |
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argv[argc++] = (char *)executableName.c_str(); |
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String pid(getpid()); |
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argv[argc++] = (char *)pid.c_str(); |
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argv[argc] = 0; |
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|
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try { |
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Process debugProc; |
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Pipe *inPipe = debugProc.getChildPipe(Process::TO_CHILD, 0); |
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Pipe *outPipe = debugProc.getChildPipe(Process::FROM_CHILD, 1); |
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Pipe *errPipe = debugProc.getChildPipe(Process::FROM_CHILD, 2); |
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|
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// Run gdb commands |
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string debugCmd = |
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string("set width ") + String(BUF_SIZE - 1) + "\nwhere\nquit\n"; |
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ssize_t size = |
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write(inPipe->getInFD(), debugCmd.c_str(), debugCmd.length()); |
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size = size; |
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|
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// Execute debugger process |
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debugProc.exec((char **)argv); |
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|
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// Read output |
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FILE *out = fdopen(outPipe->getOutFD(), "r"); |
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FILE *err = fdopen(errPipe->getOutFD(), "r"); |
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if (!out || !err) { |
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trace.push_back("Stack Trace Error: Opening debugger output streams!"); |
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|
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return false; |
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} |
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|
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char buf[BUF_SIZE + 1]; |
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int offset = 0; |
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int count = 0; |
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while (fgets(buf, BUF_SIZE, out)) |
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if (buf[0] == '#') { |
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if (traceFiltering) { |
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count++; |
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|
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if (strstr(buf, "Debugger::") || |
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strstr(buf, "Exception::init") || |
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strstr(buf, "Exception (")) { |
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offset = count; |
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trace.clear(); |
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continue; |
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} |
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} |
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|
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int line = atoi(&buf[1]) - offset; |
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char *start = strchr(buf, ' '); |
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int len = strlen(buf); |
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|
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if (buf[len - 1] == '\n' || buf[len - 1] == '\r') buf[len - 1] = 0; |
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trace.push_back(string("#") + String(line) + start); |
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} |
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|
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#ifdef DEBUGGER_PRINT_ERROR_STREAM |
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while (fgets(buf, BUF_SIZE, err)) { |
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int len = strlen(buf); |
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if (buf[len - 1] == '\n' || buf[len - 1] == '\r') buf[len - 1] = 0; |
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if (buf[0] != 0) trace.push_back(buf); |
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} |
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#endif |
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|
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|
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// Clean up |
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fclose(out); |
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fclose(err); |
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|
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debugProc.wait(); |
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if (debugProc.getReturnCode()) { |
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trace.push_back("Stack Trace Error: gdb returned an error."); |
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|
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return false; |
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} |
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|
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return true; |
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} catch (const Exception &e) { |
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trace.push_back(string("Stack Trace Error: ") + e.getMessage()); |
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} |
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|
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return false; |
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} |
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|
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bool Debugger::getStackTrace(trace_t &trace) { |
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static bool inStackTrace = false; |
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bool ret; |
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|
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if (inStackTrace) { |
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trace.push_back("Stack Trace Error: Already in stack trace!"); |
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return false; |
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} |
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|
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inStackTrace = true; |
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|
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try { |
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ret = _getStackTrace(trace); |
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} catch (...) { |
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inStackTrace = false; |
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throw; |
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} |
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inStackTrace = false; |
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|
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return ret; |
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} |
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#endif // HAVE_DEBUGGER |
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|
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#ifdef DEBUGGER_TEST |
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#include <iostream> |
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|
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void b(int x) { |
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THROW("Test cause!"); |
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} |
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|
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void a(char *x) { |
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try { |
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b(10); |
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} catch (const Exception &e) { |
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THROWC("Test exception!", e); |
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} |
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} |
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|
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int main(int argc, char *argv[]) { |
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Debugger::initStackTrace(argv[0]); |
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|
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try { |
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a("test"); |
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} catch (const Exception &e) { |
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cerr << "Exception: " << e << endl; |
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} |
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|
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return 0; |
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} |
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|
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#endif // DEBUGGER_TEST |
