We’ve started seeing sporadic but regular crashes from _Unwind_Resume in a
Foundation tool. The crashing thread is:
> Thread 0 Crashed: Dispatch queue: com.apple.main-thread
> 0 libSystem.B.dylib 0x00007fff87e363d6 __kill + 10
> 1 libSystem.B.dylib 0x00007fff87ed6972 abort + 83
> 2 libSystem.B.dylib 0x00007fff87e56972 _Unwind_Resume + 66
> 3 com.apple.CoreFoundation 0x00007fff86e43a91 CFRunLoopRunSpecific
> + 1153
> 4 com.apple.CoreFoundation 0x00007fff86e435d6 CFRunLoopRun + 70
> 5 net.decimus.Synk.Engine 0x00000001000014bb main + 615
> 6 net.decimus.Synk.Engine 0x000000010000124c start + 52
The other threads aren’t doing anything noteworthy and are just sitting idle,
but I’ll include the whole crash log below for completeness.
It’s obviously involved with exception handling, perhaps an uncaught exception,
except that we’re not getting any of the usual information in the crash log
that we typically do with an Obj-C exception. From my web searches, I suspect
something C++ is the culprit, but because we have zero C++ code of our own in
this binary, I have no idea where the problem could be or how to do anything
about it.
Any suggestions on how to track this down and fix it, or work around it if it’s
a system bug? Or has anybody seen this before and already know what the issue
is?
Thanks,
Benjamin Rister
Full crash log:
Process: Synk Engine [676]
Path: /Library/Synk/bin/Synk Engine.app/Contents/MacOS/Synk Engine
Identifier: Synk Engine
Version: ??? (???)
Code Type: X86-64 (Native)
Parent Process: launchd [1]
Date/Time: 2010-08-24 10:24:15.095 +0800
OS Version: Mac OS X 10.6.4 (10F569)
Report Version: 6
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Application Specific Information:
abort() called
objc[676]: garbage collection is ON
Thread 0 Crashed: Dispatch queue: com.apple.main-thread
0 libSystem.B.dylib 0x00007fff87e363d6 __kill + 10
1 libSystem.B.dylib 0x00007fff87ed6972 abort + 83
2 libSystem.B.dylib 0x00007fff87e56972 _Unwind_Resume + 66
3 com.apple.CoreFoundation 0x00007fff86e43a91 CFRunLoopRunSpecific
+ 1153
4 com.apple.CoreFoundation 0x00007fff86e435d6 CFRunLoopRun + 70
5 net.decimus.Synk.Engine 0x00000001000014bb main + 615
6 net.decimus.Synk.Engine 0x000000010000124c start + 52
Thread 1: Dispatch queue: com.apple.libdispatch-manager
0 libSystem.B.dylib 0x00007fff87e0108a kevent + 10
1 libSystem.B.dylib 0x00007fff87e02f5d _dispatch_mgr_invoke
+ 154
2 libSystem.B.dylib 0x00007fff87e02c34
_dispatch_queue_invoke + 185
3 libSystem.B.dylib 0x00007fff87e0275e
_dispatch_worker_thread2 + 252
4 libSystem.B.dylib 0x00007fff87e02088 _pthread_wqthread +
353
5 libSystem.B.dylib 0x00007fff87e01f25 start_wqthread + 13
Thread 2:
0 libSystem.B.dylib 0x00007fff87de82fa mach_msg_trap + 10
1 libSystem.B.dylib 0x00007fff87de896d mach_msg + 59
2 com.apple.CoreFoundation 0x00007fff86e443c2 __CFRunLoopRun + 1698
3 com.apple.CoreFoundation 0x00007fff86e4384f CFRunLoopRunSpecific
+ 575
4 com.apple.Foundation 0x00007fff85073a18
-[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 270
5 net.decimus.Synk.Engine 0x0000000100021c41 -[EngineServer main]
+ 111
6 com.apple.Foundation 0x00007fff85038e8d __NSThread__main__ +
1429
7 libSystem.B.dylib 0x00007fff87e21456 _pthread_start + 331
8 libSystem.B.dylib 0x00007fff87e21309 thread_start + 13
Thread 3:
0 libSystem.B.dylib 0x00007fff87e2bdce select$DARWIN_EXTSN
+ 10
1 com.apple.CoreFoundation 0x00007fff86e65e92 __CFSocketManager +
818
2 libSystem.B.dylib 0x00007fff87e21456 _pthread_start + 331
3 libSystem.B.dylib 0x00007fff87e21309 thread_start + 13
Thread 4:
0 libSystem.B.dylib 0x00007fff87e01eaa __workq_kernreturn +
10
1 libSystem.B.dylib 0x00007fff87e022bc _pthread_wqthread +
917
2 libSystem.B.dylib 0x00007fff87e01f25 start_wqthread + 13
Thread 5:
Thread 0 crashed with X86 Thread State (64-bit):
rax: 0x0000000000000000 rbx: 0x0000000100225c50 rcx: 0x00007fff5fbff7c8
rdx: 0x0000000000000000
rdi: 0x00000000000002a4 rsi: 0x0000000000000006 rbp: 0x00007fff5fbff7e0
rsp: 0x00007fff5fbff7c8
r8: 0x0000000000000000 r9: 0x0000000000000001 r10: 0x00007fff87e32412
r11: 0x0000000000000206
r12: 0x00007fff5fbff7f0 r13: 0x0000000100225c50 r14: 0x0000000200016db0
r15: 0x0000000000000000
rip: 0x00007fff87e363d6 rfl: 0x0000000000000206 cr2: 0x00007fff70e5d2bb
Binary Images:
0x100000000 - 0x10008cfff +net.decimus.Synk.Engine 7.0b1 (3)
<5E824075-A6CB-D78D-1996-922C1B51F546> /Library/Synk/bin/Synk
Engine.app/Contents/MacOS/Synk Engine
0x7fff5fc00000 - 0x7fff5fc3bdef dyld 132.1 (???)
<B536F2F1-9DF1-3B6C-1C2C-9075EA219A06> /usr/lib/dyld
0x7fff8002a000 - 0x7fff800cafff com.apple.LaunchServices 362.1 (362.1)
<4529EF9C-45C7-E2E3-6726-4A5AD382566D>
/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/LaunchServices
0x7fff80702000 - 0x7fff807bbfff libsqlite3.dylib 9.6.0 (compatibility
9.0.0) <5A15E12A-AE8F-1A36-BBC7-564E7D7AD0FB> /usr/lib/libsqlite3.dylib
0x7fff81152000 - 0x7fff81168fef libbsm.0.dylib ??? (???)
<83676D2E-23CD-45CD-BE5C-35FCFFBBBDBB> /usr/lib/libbsm.0.dylib
0x7fff811c9000 - 0x7fff812e0fef libxml2.2.dylib 10.3.0 (compatibility
10.0.0) <7DC5239F-CD6A-820C-7C66-C528D7E27649> /usr/lib/libxml2.2.dylib
0x7fff8137a000 - 0x7fff813bbfff com.apple.SystemConfiguration 1.10.2
(1.10.2) <BC27BDD4-9CC8-9AF0-B4C2-DD50FD751CBF>
/System/Library/Frameworks/SystemConfiguration.framework/Versions/A/SystemConfiguration
0x7fff8141a000 - 0x7fff81420ff7 com.apple.DiskArbitration 2.3 (2.3)
<857F6E43-1EF4-7D53-351B-10DE0A8F992A>
/System/Library/Frameworks/DiskArbitration.framework/Versions/A/DiskArbitration
0x7fff8247c000 - 0x7fff82539ff7 com.apple.CoreServices.OSServices 357
(357) <718F0719-DC9F-E392-7C64-9D7DFE3D02E2>
/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/OSServices.framework/Versions/A/OSServices
0x7fff8253a000 - 0x7fff82575fff com.apple.AE 496.4 (496.4)
<64C27EC8-FC7F-EA6B-9435-9A3452425915>
/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/AE.framework/Versions/A/AE
0x7fff827f5000 - 0x7fff828abfff libobjc.A.dylib 227.0.0 (compatibility
1.0.0) <B1F5CDC0-96BD-C7C0-BEAA-1E2259DDE067> /usr/lib/libobjc.A.dylib
0x7fff82ca0000 - 0x7fff82fd3fe7 com.apple.CoreServices.CarbonCore
861.13 (861.13) <BC2F9B4E-D305-D717-D97E-EC78C7DE9EE9>
/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CarbonCore.framework/Versions/A/CarbonCore
0x7fff834b6000 - 0x7fff834baff7 libmathCommon.A.dylib 315.0.0
(compatibility 1.0.0) <95718673-FEEE-B6ED-B127-BCDBDB60D4E5>
/usr/lib/system/libmathCommon.A.dylib
0x7fff83d21000 - 0x7fff83d6dfff libauto.dylib ??? (???)
<205CE82B-3DE0-4A9D-CEB9-F6A3DDA22ED4> /usr/lib/libauto.dylib
0x7fff8462f000 - 0x7fff8465aff7 libxslt.1.dylib 3.24.0 (compatibility
3.0.0) <87A0B228-B24A-C426-C3FB-B40D7258DD49> /usr/lib/libxslt.1.dylib
0x7fff8465b000 - 0x7fff8465bff7 com.apple.CoreServices 44 (44)
<210A4C56-BECB-E3E4-B6EE-7EC53E02265D>
/System/Library/Frameworks/CoreServices.framework/Versions/A/CoreServices
0x7fff8465c000 - 0x7fff8466aff7 libkxld.dylib ??? (???)
<EE840168-1F67-6219-8BA3-C46039BCC8B3> /usr/lib/system/libkxld.dylib
0x7fff84a81000 - 0x7fff84aa9fff com.apple.DictionaryServices 1.1.1
(1.1.1) <403E9BF2-EC47-1D32-E4B1-3D624AAA5BBD>
/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/DictionaryServices.framework/Versions/A/DictionaryServices
0x7fff84d3a000 - 0x7fff84d4bff7 libz.1.dylib 1.2.3 (compatibility
1.0.0) <FB5EE53A-0534-0FFA-B2ED-486609433717> /usr/lib/libz.1.dylib
0x7fff84d4c000 - 0x7fff84dc9fef libstdc++.6.dylib 7.9.0 (compatibility
7.0.0) <35ECA411-2C08-FD7D-11B1-1B7A04921A5C> /usr/lib/libstdc++.6.dylib
0x7fff84f56000 - 0x7fff85026ff7 com.apple.CFNetwork 454.9.7 (454.9.7)
<AA6EB690-6CCF-603D-AAC2-35B9E05D1593>
/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CFNetwork.framework/Versions/A/CFNetwork
0x7fff85028000 - 0x7fff852a9fef com.apple.Foundation 6.6.3 (751.29)
<DAEDB589-9F59-9556-CF8D-07556317937B>
/System/Library/Frameworks/Foundation.framework/Versions/C/Foundation
0x7fff852b3000 - 0x7fff852c2fff com.apple.NetFS 3.2.1 (3.2.1)
<3FC302C9-A5C6-A9CA-08CE-435AD05499F1>
/System/Library/Frameworks/NetFS.framework/Versions/A/NetFS
0x7fff86df8000 - 0x7fff86f6dff7 com.apple.CoreFoundation 6.6.3
(550.29) <48810602-63C3-994D-E563-DD02B16E76E1>
/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
0x7fff874a9000 - 0x7fff875e7fff com.apple.CoreData 102.1 (251)
<782F29CA-ACC7-4A77-5772-52FBE2CEFB5E>
/System/Library/Frameworks/CoreData.framework/Versions/A/CoreData
0x7fff878e5000 - 0x7fff87943ff7 com.apple.framework.IOKit 2.0 (???)
<010C3398-7363-8F4B-719C-263867F15F63>
/System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
0x7fff87de7000 - 0x7fff87fa7fef libSystem.B.dylib 125.2.0
(compatibility 1.0.0) <95E02DD0-ADEA-745B-E7FA-ABA064E4658C>
/usr/lib/libSystem.B.dylib
0x7fff883c7000 - 0x7fff8864dff7 com.apple.security 6.1.1 (37594)
<5EDDC08C-C95B-2D24-E1D2-D30D233AB065>
/System/Library/Frameworks/Security.framework/Versions/A/Security
0x7fff8864e000 - 0x7fff886defff com.apple.SearchKit 1.3.0 (1.3.0)
<3403E658-A54E-A79A-12EB-E090E8743984>
/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/SearchKit.framework/Versions/A/SearchKit
0x7fff886df000 - 0x7fff88729ff7 com.apple.Metadata 10.6.3 (507.10)
<641395B7-FF2C-B94C-965A-CE6A0830645F>
/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/Metadata.framework/Versions/A/Metadata
0x7fff88e70000 - 0x7fff8902efff libicucore.A.dylib 40.0.0
(compatibility 1.0.0) <0E53A4A6-AC06-1B61-2285-248F534EE356>
/usr/lib/libicucore.A.dylib
0x7fffffe00000 - 0x7fffffe01fff libSystem.B.dylib ??? (???)
<95E02DD0-ADEA-745B-E7FA-ABA064E4658C> /usr/lib/libSystem.B.dylib
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