Crash Stack:
Exception Type: SIGSEGV
Exception Codes: SEGV_ACCERR at 0x0000cdd42a07c738
Thread 97 Name: BDH_Thread:0x2821c7cc0
Thread 97 Crashed:
0 CoreFoundation 0x00000001813e3cfc __CFGetNonObjCTypeID + 88
1 CoreFoundation 0x000000018140896c _CFRunLoopSourceSignal + 28
2 Foundation 0x0000000182b54484 _performQueueDequeue + 464
3 Foundation 0x0000000182b3dd9c ___NSThreadPerformPerform + 104
4 CoreFoundation 0x0000000181476210 ___CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24
5 CoreFoundation 0x0000000181486238 ___CFRunLoopDoSource0 + 204
6 CoreFoundation 0x00000001813c963c ___CFRunLoopDoSources0 + 356
7 CoreFoundation 0x00000001813cea08 ___CFRunLoopRun + 768
3 CoreFoundation 0x00000001813e1d7c _CFRunLoopRunSpecific + 572
4 CoreFoundation 0x000000018145c260 _CFRunLoopRun + 60
10 QQ 0x00000001047810bc -[BDHUploadManager(Private) runRequests](BDHUploadManager+private.mm:41)
7 Foundation 0x0000000182b66efc ___NSThread__start__ + 792
4 libsystem_pthread.dylib 0x00000001db3873a4 __pthread_start + 116
5 libsystem_pthread.dylib 0x00000001db3859fc _thread_start + 8
Thread 97 crashed with ARM 64 Thread State:
x0: 0x0000cdd42a07c730 x1: 0x000000019c8800cc x2: 000000000000000000 x3: 0x0000000000000001
x4: 0x0000000000000010 x5: 0x0000000000000002 x6: 0x0000000280e3d800 x7: 0x00000000ffffffec
x8: 0x0000cdd42a07c738 x9: 0x0000000000000013 x10: 0x000000019fb06278 x11: 0x03e700019fb06279
x12: 0x0000000000dd2980 x13: 0x000021a1f29ce831 x14: 0x0000000000000001 x15: 0x00000001f29ce830
x16: 0x00000001f29ce830 x17: 0x00000001813d0c80 x18: 000000000000000000 x19: 0x0000cdd42a07c730
x20: 0x00000001f82d7900 x21: 0x0000000200000003 x22: 0x00000002837e8b70 x23: 0x0000000000000002
x24: 0x00000002821c7cc0 x25: 000000000000000000 x26: 0x00000001f82d7920 x27: 0x00000002821c7d80
80 fp: 0x000000016d23dbc0 lr: 0x000000018140896c _CFRunLoopSourceSignal + 28
0 pc: 0x00000001813e3cfc __CFGetNonObjCTypeID + 88
The Code:
[self performSelector:@selector(updateBDHConfigThread:)
onThread:[BDHUploadManager instance].uploadThread
withObject:dict
waitUntilDone:NO];
- (NSThread *)uploadThread {
if (!_uploadThread) {
_uploadThread = [[NSThread alloc] initWithTarget:self selector:@selector(runRequests) object:nil];
NSString* strThreadName = [NSString stringWithFormat:@"BDH_Thread:%p", _uploadThread];
[_uploadThread setName:strThreadName];
[_uploadThread setThreadPriority:0.6];
[_uploadThread start];
}
return _uploadThread;
}
- (void)runRequests {
CFRunLoopSourceContext context = {0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL};
CFRunLoopSourceRef source = CFRunLoopSourceCreate(kCFAllocatorDefault, 0, &context);
CFRunLoopAddSource(CFRunLoopGetCurrent(), source, kCFRunLoopDefaultMode);
while (YES)
{
@autoreleasepool
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
CFRunLoopRun();
[pool release];
}
}
}
Initial analysis：
The crash occurs when accessing an address in a x8 register , which should point to a CFRunloopSource object。
The difficulty is that I cannot reproduce it, but there are many reports from online users, so I need help !
