How to track EXC_BAD_ACCESS (SIGSEGV) error?
I got this crash when debugging my project using Xcode, but I cannot find the way to resolve this issue. The app itself didn't force close, but my xcode stop debugging when this problem showing.
I've tested on another mac (same Xcode version) and it do same thing (debugger crash, xcode stop the running scheme, but program still working well)
[edit] Crashed at thread 9... It says RPC Packet thread for client tid.
Did somebody knows how to fix this LLDB issues?
Process: lldb-rpc-server [26238]
Path: /Applications/Xcode.app/Contents/SharedFrameworks/LLDBRPC.framework/Versions/A/Resources/lldb-rpc-server
Identifier: lldb-rpc-server
Version: 2
Code Type: X86-64 (Native)
Parent Process: Xcode [25226]
Responsible: lldb-rpc-server [26238]
User ID: 502
Date/Time: 2019-01-07 13:59:04.891 +0700
OS Version: Mac OS X 10.14.2 (18C54)
Report Version: 12
Anonymous UUID: DFDE5FA9-F39E-DDB4-691F-47C516638843
Sleep/Wake UUID: 09F2CF9F-64A5-4E4A-8E46-1D9DA965A8C6
Time Awake Since Boot: 21000 seconds
Time Since Wake: 2300 seconds
System Integrity Protection: enabled
Crashed Thread: 8 RPC packet thread for client tid 00051d9b (335259)
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000282f26cb8
Exception Note: EXC_CORPSE_NOTIFY
Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Terminating Process: exc handler [26238]
VM Regions Near 0x282f26cb8:
mapped file 000000018261f000-0000000182628000 [ 36K] rw-/rwx SM=COW Object_id=eafb807
-->
STACK GUARD 000070000d9fe000-000070000d9ff000 [ 4K] ---/rwx SM=NUL stack guard for thread 1
Thread 0:: Connection::RunLoop() packet reading thread Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x00007fff63408e5e read + 10
1 lldb-rpc-server 0x0000000108dd0f37 rpc_common::RPCConnectionSocket::Read(std::__1::basic_string<unsigned char, std::__1::char_traits<unsigned char>, std::__1::allocator<unsigned char> >&, bool) + 173
2 lldb-rpc-server 0x0000000108dd7ab7 rpc_common::Connection::ReceivePacket(rpc_common::RPCPacket&) + 149
3 lldb-rpc-server 0x0000000108dd75c0 rpc_common::Connection::RunLoop() + 152
4 lldb-rpc-server 0x0000000108e19bfe main + 494
5 libdyld.dylib 0x00007fff632cded9 start + 1
Thread 1:: RPC packet thread for client tid 00051d27 (335143)
0 libsystem_kernel.dylib 0x00007fff6340a7de __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x00007fff634c4593 _pthread_cond_wait + 724
2 libc++.1.dylib 0x00007fff609a3bda std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&) + 18
3 lldb-rpc-server 0x0000000108ddadb5 Packets::ReadThread() + 321
4 lldb-rpc-server 0x0000000108ddac6f Packets::RunReadThread(void*) + 9
5 libsystem_pthread.dylib 0x00007fff634c1305 _pthread_body + 126
6 libsystem_pthread.dylib 0x00007fff634c426f _pthread_start + 70
7 libsystem_pthread.dylib 0x00007fff634c0415 thread_start + 13
Thread 2:: lldb.debugger.io-handler
0 libsystem_kernel.dylib 0x00007fff63408122 __read_nocancel + 10
1 libsystem_c.dylib 0x00007fff6335c87b _sread + 16
2 libsystem_c.dylib 0x00007fff6335bed1 __srefill1 + 24
3 libsystem_c.dylib 0x00007fff63355824 fgets + 98
4 com.apple.LLDB.framework 0x000000010d1b1c75 lldb_private::IOHandlerEditline::GetLine(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&, bool&) + 405
5 com.apple.LLDB.framework 0x000000010d1b210d lldb_private::IOHandlerEditline::Run() + 153
6 com.apple.LLDB.framework 0x000000010d075ad2 lldb_private::Debugger::ExecuteIOHandlers() + 68
7 com.apple.LLDB.framework 0x000000010d0787ba lldb_private::Debugger::IOHandlerThread(void*) + 14
8 com.apple.LLDB.framework 0x000000010d2bf3ef lldb_private::HostNativeThreadBase::ThreadCreateTrampoline(void*) + 105
9 libsystem_pthread.dylib 0x00007fff634c1305 _pthread_body + 126
10 libsystem_pthread.dylib 0x00007fff634c426f _pthread_start + 70
11 libsystem_pthread.dylib 0x00007fff634c0415 thread_start + 13
Thread 3:
0 libsystem_pthread.dylib 0x00007fff634c03f8 start_wqthread + 0
1 ??? 0x0000000054485244 0 + 1414025796
Thread 4:
0 libsystem_kernel.dylib 0x00007fff6340717a mach_msg_trap + 10
1 libsystem_kernel.dylib 0x00007fff634076d0 mach_msg + 60
2 com.apple.CoreFoundation 0x00007fff3608d0c2 __CFRunLoopServiceMachPort + 337
3 com.apple.CoreFoundation 0x00007fff3608c611 __CFRunLoopRun + 1654
4 com.apple.CoreFoundation 0x00007fff3608bd48 CFRunLoopRunSpecific + 463
5 com.apple.CoreFoundation 0x00007fff3608bb54 CFRunLoopRun + 40
6 com.apple.DebugSymbols 0x00007fff4b5d909b SpotlightQueryThread(void*) + 475
7 libsystem_pthread.dylib 0x00007fff634c1305 _pthread_body + 126
8 libsystem_pthread.dylib 0x00007fff634c426f _pthread_start + 70
9 libsystem_pthread.dylib 0x00007fff634c0415 thread_start + 13
Thread 5:: <lldb.process.gdb-remote.async>
0 libsystem_kernel.dylib 0x00007fff6340a7de __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x00007fff634c4593 _pthread_cond_wait + 724
2 libc++.1.dylib 0x00007fff609a3bda std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&) + 18
3 com.apple.LLDB.framework 0x000000010d087d71 lldb_private::Listener::GetEventInternal(lldb_private::Timeout<std::__1::ratio<1l, 1000000l> > const&, lldb_private::Broadcaster*, lldb_private::ConstString const*, unsigned int, unsigned int, std::__1::shared_ptr<lldb_private::Event>&) + 195
4 com.apple.LLDB.framework 0x000000010d088019 lldb_private::Listener::GetEvent(std::__1::shared_ptr<lldb_private::Event>&, lldb_private::Timeout<std::__1::ratio<1l, 1000000l> > const&) + 33
5 com.apple.LLDB.framework 0x000000010d20f181 lldb_private::process_gdb_remote::ProcessGDBRemote::AsyncThread(void*) + 281
6 com.apple.LLDB.framework 0x000000010d2bf3ef lldb_private::HostNativeThreadBase::ThreadCreateTrampoline(void*) + 105
7 libsystem_pthread.dylib 0x00007fff634c1305 _pthread_body + 126
8 libsystem_pthread.dylib 0x00007fff634c426f _pthread_start + 70
9 libsystem_pthread.dylib 0x00007fff634c0415 thread_start + 13
Thread 6:: <lldb.process.internal-state(pid=0)>
0 libsystem_kernel.dylib 0x00007fff6340a7de __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x00007fff634c4593 _pthread_cond_wait + 724
2 libc++.1.dylib 0x00007fff609a3bda std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&) + 18
3 com.apple.LLDB.framework 0x000000010d087d71 lldb_private::Listener::GetEventInternal(lldb_private::Timeout<std::__1::ratio<1l, 1000000l> > const&, lldb_private::Broadcaster*, lldb_private::ConstString const*, unsigned int, unsigned int, std::__1::shared_ptr<lldb_private::Event>&) + 195
4 com.apple.LLDB.framework 0x000000010d088019 lldb_private::Listener::GetEvent(std::__1::shared_ptr<lldb_private::Event>&, lldb_private::Timeout<std::__1::ratio<1l, 1000000l> > const&) + 33
5 com.apple.LLDB.framework 0x000000010d2ec3c1 lldb_private::Process::RunPrivateStateThread(bool) + 189
6 com.apple.LLDB.framework 0x000000010d2ebea6 lldb_private::Process::PrivateStateThread(void*) + 22
7 com.apple.LLDB.framework 0x000000010d2bf3ef lldb_private::HostNativeThreadBase::ThreadCreateTrampoline(void*) + 105
8 libsystem_pthread.dylib 0x00007fff634c1305 _pthread_body + 126
9 libsystem_pthread.dylib 0x00007fff634c426f _pthread_start + 70
10 libsystem_pthread.dylib 0x00007fff634c0415 thread_start + 13
Thread 7:: RPC packet thread for client tid 0004f416 (324630)
0 libsystem_kernel.dylib 0x00007fff6340a7de __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x00007fff634c4593 _pthread_cond_wait + 724
2 libc++.1.dylib 0x00007fff609a3bda std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&) + 18
3 lldb-rpc-server 0x0000000108ddadb5 Packets::ReadThread() + 321
4 lldb-rpc-server 0x0000000108ddac6f Packets::RunReadThread(void*) + 9
5 libsystem_pthread.dylib 0x00007fff634c1305 _pthread_body + 126
6 libsystem_pthread.dylib 0x00007fff634c426f _pthread_start + 70
7 libsystem_pthread.dylib 0x00007fff634c0415 thread_start + 13
Thread 8 Crashed:: RPC packet thread for client tid 00051d9b (335259)
0 libsystem_platform.dylib 0x00007fff634b5d89 _platform_memmove$VARIANT$Haswell + 169
1 com.apple.LLDB.framework 0x000000010d0db549 lldb_private::Value::GetValueAsData(lldb_private::ExecutionContext*, lldb_private::DataExtractor&, unsigned int, lldb_private::Module*) + 1549
2 com.apple.LLDB.framework 0x000000010d0e8778 lldb_private::ValueObjectChild::UpdateValue() + 1100
3 com.apple.LLDB.framework 0x000000010d0dd23a lldb_private::ValueObject::UpdateValueIfNeeded(bool) + 646
4 com.apple.LLDB.framework 0x000000010d0de59d lldb_private::ValueObject::ResolveValue(lldb_private::Scalar&) + 43
5 com.apple.LLDB.framework 0x000000010d0e110d lldb_private::ValueObject::GetValueAsUnsigned(unsigned long long, bool*) + 75
6 com.apple.LLDB.framework 0x000000010d3e9750 lldb_private::formatters::swift::Data_SummaryProvider(lldb_private::ValueObject&, lldb_private::Stream&, lldb_private::TypeSummaryOptions const&) + 192
7 com.apple.LLDB.framework 0x000000010d4e375c lldb_private::CXXFunctionSummaryFormat::FormatObject(lldb_private::ValueObject*, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&, lldb_private::TypeSummaryOptions const&) + 98
8 com.apple.LLDB.framework 0x000000010d0df30a lldb_private::ValueObject::GetSummaryAsCString(lldb_private::TypeSummaryImpl*, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&, lldb_private::TypeSummaryOptions const&) + 202
9 com.apple.LLDB.framework 0x000000010d0df404 lldb_private::ValueObject::GetSummaryAsCString(lldb::LanguageType) + 200
10 com.apple.LLDB.framework 0x000000010d244837 lldb_private::formatters::swift::SwiftOptionalSummaryProvider::FormatObject(lldb_private::ValueObject*, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&, lldb_private::TypeSummaryOptions const&) + 85
11 com.apple.LLDB.framework 0x000000010d0df30a lldb_private::ValueObject::GetSummaryAsCString(lldb_private::TypeSummaryImpl*, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&, lldb_private::TypeSummaryOptions const&) + 202
12 com.apple.LLDB.framework 0x000000010d0df404 lldb_private::ValueObject::GetSummaryAsCString(lldb::LanguageType) + 200
13 com.apple.LLDB.framework 0x000000010a1889e8 lldb::SBValue::GetSummary() + 72
14 lldb-rpc-server 0x0000000108e15a5f rpc_server::_ZN4lldb7SBValue10GetSummaryEv::HandleRPCCall(rpc_common::Connection&, rpc_common::RPCStream&, rpc_common::RPCStream&) + 35
15 lldb-rpc-server 0x0000000108dd673f rpc_common::Connection::PrivateHandleRPCPacket(rpc_common::RPCPacket&, rpc_common::RPCPacket&, bool&) + 469
16 lldb-rpc-server 0x0000000108dd74e0 rpc_common::Connection::HandleRPCPacket(rpc_common::RPCPacket&) + 62
17 lldb-rpc-server 0x0000000108ddaf12 Packets::ProcessPackets() + 256
18 lldb-rpc-server 0x0000000108ddad95 Packets::ReadThread() + 289
19 lldb-rpc-server 0x0000000108ddac6f Packets::RunReadThread(void*) + 9
20 libsystem_pthread.dylib 0x00007fff634c1305 _pthread_body + 126
21 libsystem_pthread.dylib 0x00007fff634c426f _pthread_start + 70
22 libsystem_pthread.dylib 0x00007fff634c0415 thread_start + 13
Thread 9:: RPC packet thread for client tid 00051c0a (334858)
0 libsystem_kernel.dylib 0x00007fff6340a7de __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x00007fff634c4593 _pthread_cond_wait + 724
2 libc++.1.dylib 0x00007fff609a3bda std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&) + 18
3 lldb-rpc-server 0x0000000108ddadb5 Packets::ReadThread() + 321
4 lldb-rpc-server 0x0000000108ddac6f Packets::RunReadThread(void*) + 9
5 libsystem_pthread.dylib 0x00007fff634c1305 _pthread_body + 126
6 libsystem_pthread.dylib 0x00007fff634c426f _pthread_start + 70
7 libsystem_pthread.dylib 0x00007fff634c0415 thread_start + 13
Thread 10:: RPC packet thread for client tid 00051da9 (335273)
0 libsystem_kernel.dylib 0x00007fff6340a7de __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x00007fff634c4593 _pthread_cond_wait + 724
2 libc++.1.dylib 0x00007fff609a3bda std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&) + 18
3 lldb-rpc-server 0x0000000108ddadb5 Packets::ReadThread() + 321
4 lldb-rpc-server 0x0000000108ddac6f Packets::RunReadThread(void*) + 9
5 libsystem_pthread.dylib 0x00007fff634c1305 _pthread_body + 126
6 libsystem_pthread.dylib 0x00007fff634c426f _pthread_start + 70
7 libsystem_pthread.dylib 0x00007fff634c0415 thread_start + 13
Thread 11:: RPC packet thread for client tid 00051ef3 (335603)
0 libsystem_kernel.dylib 0x00007fff6340a7de __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x00007fff634c4593 _pthread_cond_wait + 724
2 libc++.1.dylib 0x00007fff609a3bda std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&) + 18
3 lldb-rpc-server 0x0000000108ddadb5 Packets::ReadThread() + 321
4 lldb-rpc-server 0x0000000108ddac6f Packets::RunReadThread(void*) + 9
5 libsystem_pthread.dylib 0x00007fff634c1305 _pthread_body + 126
6 libsystem_pthread.dylib 0x00007fff634c426f _pthread_start + 70
7 libsystem_pthread.dylib 0x00007fff634c0415 thread_start + 13
Thread 12:: RPC packet thread for client tid 00051ef4 (335604)
0 libsystem_kernel.dylib 0x00007fff6340a7de __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x00007fff634c4593 _pthread_cond_wait + 724
2 libc++.1.dylib 0x00007fff609a3bda std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&) + 18
3 lldb-rpc-server 0x0000000108ddadb5 Packets::ReadThread() + 321
4 lldb-rpc-server 0x0000000108ddac6f Packets::RunReadThread(void*) + 9
5 libsystem_pthread.dylib 0x00007fff634c1305 _pthread_body + 126
6 libsystem_pthread.dylib 0x00007fff634c426f _pthread_start + 70
7 libsystem_pthread.dylib 0x00007fff634c0415 thread_start + 13
Thread 13:: RPC packet thread for client tid 0005219b (336283)
0 libsystem_kernel.dylib 0x00007fff6340a7de __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x00007fff634c4593 _pthread_cond_wait + 724
2 libc++.1.dylib 0x00007fff609a3bda std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&) + 18
3 lldb-rpc-server 0x0000000108ddadb5 Packets::ReadThread() + 321
4 lldb-rpc-server 0x0000000108ddac6f Packets::RunReadThread(void*) + 9
5 libsystem_pthread.dylib 0x00007fff634c1305 _pthread_body + 126
6 libsystem_pthread.dylib 0x00007fff634c426f _pthread_start + 70
7 libsystem_pthread.dylib 0x00007fff634c0415 thread_start + 13
Thread 8 crashed with X86 Thread State (64-bit):
rax: 0x00007f9a0adb3f80 rbx: 0x00007f9a0adb3f80 rcx: 0x0000000000000008 rdx: 0x0000000000000000
rdi: 0x00007f9a0adb3f80 rsi: 0x0000000282f26cb8 rbp: 0x0000700010393470 rsp: 0x0000700010393470
r8: 0x0000000000000000 r9: 0x0000000000000009 r10: 0x0000000000000001 r11: 0x00007f9787e8d2c8
r12: 0x0000000000000008 r13: 0x0000000000000000 r14: 0x00007f9a087296a8 r15: 0x00007000103935d0
rip: 0x00007fff634b5d89 rfl: 0x0000000000010246 cr2: 0x0000000282f26cb8
Logical CPU: 3
Error Code: 0x00000004
Trap Number: 14
External Modification Summary:
Calls made by other processes targeting this process:
task_for_pid: 0
thread_create: 0
thread_set_state: 0
Calls made by this process:
task_for_pid: 0
thread_create: 0
thread_set_state: 0
Calls made by all processes on this machine:
task_for_pid: 12059
thread_create: 0
thread_set_state: 0
VM Region Summary:
ReadOnly portion of Libraries: Total=413.7M resident=0K(0%) swapped_out_or_unallocated=413.7M(100%)
Writable regions: Total=1.3G written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=1.3G(100%)
VIRTUAL REGION
REGION TYPE SIZE COUNT (non-coalesced)
=========== ======= =======
Activity Tracing 256K 2
Dispatch continuations 8192K 2
Kernel Alloc Once 8K 2
MALLOC 1.2G 388
MALLOC guard page 16K 5
MALLOC_LARGE (reserved) 2088K 3 reserved VM address space (unallocated)
STACK GUARD 56.1M 15
Stack 90.0M 60
VM_ALLOCATE 7756K 21
VM_ALLOCATE (reserved) 2816K 12 reserved VM address space (unallocated)
__DATA 20.7M 207
__FONT_DATA 4K 2
__LINKEDIT 233.0M 18
__TEXT 180.7M 207
__UNICODE 564K 2
mapped file 1.2G 1307
shared memory 592K 7
=========== ======= =======
TOTAL 3.0G 2243
TOTAL, minus reserved VM space 3.0G 2243
Ricardo Milos0 Answers
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