Bug 11212 - MT5202 duplicate symbols problem
Summary: MT5202 duplicate symbols problem
Status: RESOLVED FIXED
Alias: None
Product: iOS
Classification: Xamarin
Component: Pre-release ()
Version: 6.3.x
Hardware: Macintosh Mac OS
: --- normal
Target Milestone: Untriaged
Assignee: Zoltan Varga
URL:
Depends on:
Blocks:
 
Reported: 2013-03-17 11:21 UTC by Simon Hu
Modified: 2013-03-20 02:05 UTC (History)
2 users (show)

Tags:
Is this bug a regression?: ---
Last known good build:


Attachments
Sample to reproduce the problem in XS prerelease (3.29 MB, application/zip)
2013-03-17 11:21 UTC, Simon Hu
Details


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Status:
RESOLVED FIXED

Description Simon Hu 2013-03-17 11:21:26 UTC
Created attachment 3637 [details]
Sample to reproduce the problem in XS prerelease

While use XS prerelease to open old project which created under stable version using some binding. without any modification just make a build using release->device profile, it will cause the MT5202 problem, but with release->simulator profile, every thing fine.
There's no problem while create any new project using same binding.
Comment 1 Sebastien Pouliot 2013-03-18 08:16:31 UTC
ref: http://forums.xamarin.com/discussion/2359/strange-mt5202-problem#latest

Zoltan, this looks like #11076 but there not much details about it. Is there a workaround for this ?
Comment 2 Zoltan Varga 2013-03-18 10:32:04 UTC
It only seems to happen with specific circumstances, like a specific gcc/clang version or specific compiler flags, I couldn't figure it out.
The workaround is to disable LLVM.
Comment 3 Simon Hu 2013-03-19 04:41:29 UTC
Update to new beta test of Xamarin.iOS 6.3.1

The MT5202 gone. but while using release->device profile, I must disable the LLVM optimize. Or else press the unzip button will halt the program.

Below is the crash log of the program:

Incident Identifier: DAD61401-4542-4C01-8AEC-5FE22A63F0E7
CrashReporter Key:   78db12db157f35429726211f53c5b9512fec1969
Hardware Model:      iPhone5,2
Process:         TestApp [3205]
Path:            /var/mobile/Applications/1D31881F-EB49-4CC7-B035-6D98FF8D25CB/ZipArchiveSample.app/TestApp
Identifier:      TestApp
Version:         ??? (???)
Code Type:       ARM (Native)
Parent Process:  launchd [1]

Date/Time:       2013-03-19 16:37:17.449 +0800
OS Version:      iOS 6.1.2 (10B146)
Report Version:  104

Exception Type:  00000020
Exception Codes: 0x000000008badf00d
Highlighted Thread:  0

Application Specific Information:
TestApp[3205] has active assertions beyond permitted time: 
{(
    <BKProcessAssertion: 0x1e56bb60> identifier: Suspending process: TestApp[3205] permittedBackgroundDuration: 10.000000 reason: suspend owner pid:26 preventSuspend  preventThrottleDownCPU  preventThrottleDownUI 
)}

Elapsed total CPU time (seconds): 8.090 (user 8.090, system 0.000), 52% CPU 
Elapsed application CPU time (seconds): 7.739, 50% CPU

Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0:
0   TestApp                       	0x0011ccda 0x1000 + 1162458
1   TestApp                       	0x001bbb94 0x1000 + 1813396
2   TestApp                       	0x0016b890 0x1000 + 1484944
3   TestApp                       	0x00177b72 0x1000 + 1534834
4   TestApp                       	0x0017674a 0x1000 + 1529674
5   TestApp                       	0x000d8170 0x1000 + 881008
6   TestApp                       	0x000b8f00 0x1000 + 753408
7   TestApp                       	0x0017cbce 0x1000 + 1555406
8   TestApp                       	0x00181b9c 0x1000 + 1575836
9   TestApp                       	0x00113256 0x1000 + 1122902
10  UIKit                         	0x34c3a082 -[UIApplication sendAction:to:from:forEvent:] + 66
11  UIKit                         	0x34c3a036 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 26
12  UIKit                         	0x34c3a010 -[UIControl sendAction:to:forEvent:] + 40
13  UIKit                         	0x34c398c6 -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 498
14  UIKit                         	0x34c39db4 -[UIControl touchesEnded:withEvent:] + 484
15  UIKit                         	0x34b625f4 -[UIWindow _sendTouchesForEvent:] + 520
16  UIKit                         	0x34b4f8dc -[UIApplication sendEvent:] + 376
17  UIKit                         	0x34b4f1ea _UIApplicationHandleEvent + 6194
18  GraphicsServices              	0x368665f4 _PurpleEventCallback + 588
19  GraphicsServices              	0x36866222 PurpleEventCallback + 30
20  CoreFoundation                	0x32d153e4 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 32
21  CoreFoundation                	0x32d15386 __CFRunLoopDoSource1 + 134
22  CoreFoundation                	0x32d1420a __CFRunLoopRun + 1378
23  CoreFoundation                	0x32c87238 CFRunLoopRunSpecific + 352
24  CoreFoundation                	0x32c870c4 CFRunLoopRunInMode + 100
25  GraphicsServices              	0x36865336 GSEventRunModal + 70
26  UIKit                         	0x34ba32b4 UIApplicationMain + 1116
27  TestApp                       	0x00028314 0x1000 + 160532
28  TestApp                       	0x00007f88 0x1000 + 28552
29  TestApp                       	0x000b8f00 0x1000 + 753408
30  TestApp                       	0x0017cbce 0x1000 + 1555406
31  TestApp                       	0x00181b9c 0x1000 + 1575836
32  TestApp                       	0x001847fe 0x1000 + 1587198
33  TestApp                       	0x00184a52 0x1000 + 1587794
34  TestApp                       	0x0014bbca 0x1000 + 1354698
35  TestApp                       	0x001d5ae8 0x1000 + 1919720
36  libdyld.dylib                 	0x3ae5eb1c start + 0

Thread 1 name:  Dispatch queue: com.apple.libdispatch-manager
Thread 1:
0   libsystem_kernel.dylib        	0x3af155d0 kevent64 + 24
1   libdispatch.dylib             	0x3ae50d22 _dispatch_mgr_invoke + 806
2   libdispatch.dylib             	0x3ae4c374 _dispatch_mgr_thread + 32

Thread 2 name:  WebThread
Thread 2:
0   libsystem_kernel.dylib        	0x3af14e30 mach_msg_trap + 20
1   libsystem_kernel.dylib        	0x3af14fd0 mach_msg + 48
2   CoreFoundation                	0x32d152b6 __CFRunLoopServiceMachPort + 126
3   CoreFoundation                	0x32d1402c __CFRunLoopRun + 900
4   CoreFoundation                	0x32c87238 CFRunLoopRunSpecific + 352
5   CoreFoundation                	0x32c870c4 CFRunLoopRunInMode + 100
6   WebCore                       	0x38c86390 RunWebThread(void*) + 440
7   libsystem_c.dylib             	0x3ae7e0de _pthread_start + 306
8   libsystem_c.dylib             	0x3ae7dfa4 thread_start + 4

Unknown thread crashed with unknown flavor: 5, state_count: 1

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0x3ae13000 - 0x3ae49fff  libcorecrypto.dylib armv7s  <a15c807dcb003ad69810546a578774d9> /usr/lib/system/libcorecrypto.dylib
0x3ae4a000 - 0x3ae5afff  libdispatch.dylib armv7s  <247a388103633e17b24be038eac612c0> /usr/lib/system/libdispatch.dylib
0x3ae5b000 - 0x3ae5cfff  libdnsinfo.dylib armv7s  <f873dd712561350096b9452bf1fc4078> /usr/lib/system/libdnsinfo.dylib
0x3ae5d000 - 0x3ae5efff  libdyld.dylib armv7s  <15676e2ee1423f598907ff49fcede85b> /usr/lib/system/libdyld.dylib
0x3ae5f000 - 0x3ae5ffff  libkeymgr.dylib armv7s  <b0a1a911d4853feba44133e9ce499bc9> /usr/lib/system/libkeymgr.dylib
0x3ae60000 - 0x3ae65fff  liblaunch.dylib armv7s  <69dd64aba1413e75967cd4ad0afa2c15> /usr/lib/system/liblaunch.dylib
0x3ae66000 - 0x3ae69fff  libmacho.dylib armv7s  <5905b311c6fb376388e56a991bb3193d> /usr/lib/system/libmacho.dylib
0x3ae6a000 - 0x3ae6bfff  libremovefile.dylib armv7s  <b40e964d7c563296b38625bc7082d6a8> /usr/lib/system/libremovefile.dylib
0x3ae6c000 - 0x3ae6cfff  libsystem_blocks.dylib armv7s  <77a9976b82b73796a0bbc9783929a1e7> /usr/lib/system/libsystem_blocks.dylib
0x3ae6d000 - 0x3aef3fff  libsystem_c.dylib armv7s  <11bcf1060ec63c8b909a452e6f79be08> /usr/lib/system/libsystem_c.dylib
0x3aef4000 - 0x3aefafff  libsystem_dnssd.dylib armv7s  <94fab309ed9b35cdbc075cdda221bc70> /usr/lib/system/libsystem_dnssd.dylib
0x3aefb000 - 0x3af13fff  libsystem_info.dylib armv7s  <195d8eeb7c3f31bd916c0b5611abc0e7> /usr/lib/system/libsystem_info.dylib
0x3af14000 - 0x3af2afff  libsystem_kernel.dylib armv7s  <79bea3ebfda132baba8f5b0ad6ab95f5> /usr/lib/system/libsystem_kernel.dylib
0x3af2b000 - 0x3af47fff  libsystem_m.dylib armv7s  <faafc8292d4935c4a78233e1d0879e13> /usr/lib/system/libsystem_m.dylib
0x3af48000 - 0x3af56fff  libsystem_network.dylib armv7s  <137f48e279a83d7496659c8e3d3729d4> /usr/lib/system/libsystem_network.dylib
0x3af57000 - 0x3af5efff  libsystem_notify.dylib armv7s  <df14146497cb3fa0a002eedbed49da65> /usr/lib/system/libsystem_notify.dylib
0x3af5f000 - 0x3af60fff  libsystem_sandbox.dylib armv7s  <85e91e99abc03db88eddc665424090b4> /usr/lib/system/libsystem_sandbox.dylib
0x3af61000 - 0x3af61fff  libunwind.dylib armv7s  <3b7ec561dbec3a199f09ea08a64e76ee> /usr/lib/system/libunwind.dylib
0x3af62000 - 0x3af77fff  libxpc.dylib armv7s  <0562a59bdf8d3f7783e93f35d7e724a8> /usr/lib/system/libxpc.dylib
Comment 4 Sebastien Pouliot 2013-03-19 08:58:48 UTC
> Exception Codes: 0x000000008badf00d

The `8badfood` code means that the iOS watchdog killed the application. 

That often (but not always) occurs when starting the application (the +/- 20 seconds you have to start an app and give back control to iOS). A common case is having a debugger breakpoint in that code.

That does not sounds like your case as LLVM does not support debugging. Maybe the code entered an infinite loop - which would also cause the watchdog to kill it at some point.
Comment 5 Zoltan Varga 2013-03-19 23:55:05 UTC
Fixed in master, the fix will be in the next 3.0 prelease.
Comment 6 Simon Hu 2013-03-20 02:05:05 UTC
Allright, wait for the next version.