1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
/*
* Copyright (C) 2014 Aaron Seigo <aseigo@kde.org>
*
* 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 2 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, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <QCoreApplication>
#include <QLockFile>
#include <QDir>
#include <signal.h>
#include <execinfo.h>
#include <csignal>
#include <iostream>
#include <cstdlib>
#include <cxxabi.h>
#include <dlfcn.h>
#include <ostream>
#include <sstream>
#include <thread>
#include <chrono>
#include <unistd.h>
#include "listener.h"
#include "log.h"
#include "test.h"
#include "definitions.h"
SINK_DEBUG_AREA("main")
static Listener *listener = nullptr;
//Print a demangled stacktrace
void printStacktrace()
{
int skip = 1;
void *callstack[128];
const int nMaxFrames = sizeof(callstack) / sizeof(callstack[0]);
char buf[1024];
int nFrames = backtrace(callstack, nMaxFrames);
char **symbols = backtrace_symbols(callstack, nFrames);
std::ostringstream trace_buf;
for (int i = skip; i < nFrames; i++) {
// printf("%s\n", symbols[i]);
Dl_info info;
if (dladdr(callstack[i], &info) && info.dli_sname) {
char *demangled = NULL;
int status = -1;
if (info.dli_sname[0] == '_') {
demangled = abi::__cxa_demangle(info.dli_sname, NULL, 0, &status);
}
snprintf(buf, sizeof(buf), "%-3d %*p %s + %zd\n",
i, int(2 + sizeof(void*) * 2), callstack[i],
status == 0 ? demangled :
info.dli_sname == 0 ? symbols[i] : info.dli_sname,
(char *)callstack[i] - (char *)info.dli_saddr);
free(demangled);
} else {
snprintf(buf, sizeof(buf), "%-3d %*p %s\n",
i, int(2 + sizeof(void*) * 2), callstack[i], symbols[i]);
}
trace_buf << buf;
}
free(symbols);
if (nFrames == nMaxFrames) {
trace_buf << "[truncated]\n";
}
std::cerr << trace_buf.str();
}
static int sCounter = 0;
void crashHandler(int signal)
{
//Guard against crashing in here
if (sCounter > 1) {
std::_Exit(EXIT_FAILURE);
}
sCounter++;
if (signal == SIGABRT) {
std::cerr << "SIGABRT received\n";
} else if (signal == SIGSEGV) {
std::cerr << "SIGSEV received\n";
} else {
std::cerr << "Unexpected signal " << signal << " received\n";
}
printStacktrace();
//Get the word out that we're going down
listener->emergencyAbortAllConnections();
std::cout << "Sleeping for 10s to attach a debugger: gdb attach " << getpid();
std::this_thread::sleep_for(std::chrono::seconds(10));
// std::system("exec gdb -p \"$PPID\" -ex \"thread apply all bt\"");
// This only works if we actually have xterm and X11 available
// std::system("exec xterm -e gdb -p \"$PPID\"");
std::_Exit(EXIT_FAILURE);
}
void terminateHandler()
{
std::exception_ptr exptr = std::current_exception();
if (exptr != 0)
{
// the only useful feature of std::exception_ptr is that it can be rethrown...
try {
std::rethrow_exception(exptr);
} catch (std::exception &ex) {
std::fprintf(stderr, "Terminated due to exception: %s\n", ex.what());
} catch (...) {
std::fprintf(stderr, "Terminated due to unknown exception\n");
}
} else {
std::fprintf(stderr, "Terminated due to unknown reason :(\n");
}
std::abort();
}
int main(int argc, char *argv[])
{
// For crashes
std::signal(SIGSEGV, crashHandler);
std::signal(SIGABRT, crashHandler);
std::set_terminate(terminateHandler);
QCoreApplication app(argc, argv);
app.setQuitLockEnabled(false);
QByteArrayList arguments;
for (int i = 0; i < argc; i++) {
arguments << argv[i];
}
if (arguments.contains("--test")) {
SinkLog() << "Running in test-mode";
arguments.removeAll("--test");
Sink::Test::setTestModeEnabled(true);
}
if (arguments.count() < 3) {
SinkWarning() << "Not enough args passed, no resource loaded.";
return app.exec();
}
const QByteArray instanceIdentifier = arguments.at(1);
const QByteArray resourceType = arguments.at(2);
app.setApplicationName(instanceIdentifier);
Sink::Log::setPrimaryComponent(instanceIdentifier);
SinkLog() << "Starting: " << instanceIdentifier << resourceType;
QDir{}.mkpath(Sink::resourceStorageLocation(instanceIdentifier));
QLockFile lockfile(Sink::resourceStorageLocation(instanceIdentifier) + "/resource.lock");
lockfile.setStaleLockTime(500);
if (!lockfile.tryLock(0)) {
SinkWarning() << "Failed to acquire exclusive lock on socket.";
return -1;
}
listener = new Listener(instanceIdentifier, resourceType, &app);
QObject::connect(&app, &QCoreApplication::aboutToQuit, listener, &Listener::closeAllConnections);
QObject::connect(listener, &Listener::noClients, &app, &QCoreApplication::quit);
auto ret = app.exec();
SinkLog() << "Exiting: " << instanceIdentifier;
return ret;
}
|
