kopia lustrzana https://github.com/jamescoxon/dl-fldigi
179 wiersze
4.1 KiB
C++
179 wiersze
4.1 KiB
C++
// ----------------------------------------------------------------------------
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// stacktrace.cxx: portable stack trace and error handlers
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//
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// Copyright (C) 2007-2009
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// Stelios Bounanos, M0GLD
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//
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// This file is part of fldigi.
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//
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// fldigi is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 3 of the License, or
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// (at your option) any later version.
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//
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// fldigi 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, see <http://www.gnu.org/licenses/>.
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// ----------------------------------------------------------------------------
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#include <config.h>
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#ifdef __MINGW32__
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# include "compat.h"
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#endif
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#include <unistd.h>
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#if HAVE_DBG_STACK
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# include <fstream>
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#endif
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#include <iostream>
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#include <cstdio>
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#include <cstdlib>
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#include <csignal>
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#ifdef BUILD_FLDIGI
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# include "main.h"
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#else
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# include "flarq.h"
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#endif
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using namespace std;
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static volatile sig_atomic_t signum = 0;
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#if !HAVE_DBG_STACK
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static void pstack(int fd, unsigned skip = 0);
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#else
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static void pstack(ostream& out, unsigned skip = 0);
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#endif
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void diediedie(void)
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{
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#ifndef __MINGW32__
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// If this environment variable is set, creates a core dump.
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if( getenv("FLDIGI_COREDUMP") )
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{
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signal(SIGSEGV, SIG_DFL);
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kill(getpid(), SIGSEGV);
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}
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#endif
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static bool print_trace = true;
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if (!print_trace)
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exit(128 + (signum ? signum : SIGABRT));
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#define CRASH_HEADER "\nAborting " PACKAGE_TARNAME " due to a fatal error.\n" \
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"Please report this to: " PACKAGE_BUGREPORT \
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"\nor file a bug report at: " PACKAGE_NEWBUG \
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"\n\n****** Stack trace:\n"
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#ifndef __MINGW32__
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if (isatty(STDERR_FILENO))
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#endif
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{
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if (signum)
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cerr << "\nCaught signal " << signum;
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cerr << CRASH_HEADER;
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#if !HAVE_DBG_STACK
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pstack(STDERR_FILENO);
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#else
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pstack(cerr);
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#endif
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extern string version_text, build_text;
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cerr << "\n****** Version information:\n" << version_text
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<< "\n****** Build information:\n" << build_text;
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string stfname;
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#ifdef BUILD_FLDIGI
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stfname.assign(HomeDir).append("stacktrace.txt");
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#else
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stfname = Logfile;
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#endif
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#if !HAVE_DBG_STACK
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FILE* stfile = fopen(stfname.c_str(), "w");
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if (stfile) {
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pstack(fileno(stfile), 1);
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fprintf(stfile, "%s\n****** Version information:\n%s\n****** Build information:%s\n",
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CRASH_HEADER, version_text.c_str(), build_text.c_str());
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}
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#else
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ofstream stfile(stfname.c_str());
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if (stfile) {
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stfile << CRASH_HEADER;
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pstack(stfile, 1);
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stfile << "\n****** Version information:\n" << version_text;
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stfile << "\n****** Build information:\n" << build_text;
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}
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#endif
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}
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print_trace = false;
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exit(128 + (signum ? signum : SIGABRT));
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}
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#if !HAVE_DBG_STACK
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# if HAVE_EXECINFO_H
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# include <execinfo.h>
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# define MAX_STACK_FRAMES 64
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void pstack(int fd, unsigned skip)
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{
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void* stack[MAX_STACK_FRAMES];
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++skip;
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backtrace_symbols_fd(stack + skip, backtrace(stack, MAX_STACK_FRAMES) - skip, fd);
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}
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# else
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void pstack(int fd, unsigned skip) { }
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# endif
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#else
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# include <algorithm>
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# include <iterator>
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# include "stack.h"
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static void pstack(ostream& out, unsigned skip)
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{
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dbg::stack s;
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dbg::stack::const_iterator start = s.begin(), end = s.end();
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while (skip-- && ++start != end);
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copy(start, end, ostream_iterator<dbg::stack_frame>(out, "\n"));
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}
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#endif
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void pstack_maybe(void)
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{
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static bool trace = getenv("FLDIGI_TRACE_LOCKS");
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if (trace)
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#if !HAVE_DBG_STACK
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pstack(STDERR_FILENO, 1);
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#else
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pstack(cerr, 1);
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#endif
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}
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void handle_unexpected(void)
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{
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cerr << "Uncaught exception. Not again!\n";
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abort();
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}
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// this may not give us anything useful, but we can try...
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void handle_signal(int s)
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{
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if (s != SIGUSR2) {
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signum = s;
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diediedie();
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}
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}
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