Use ssh to run ios-sim will cause segmentation fault:10

[CiaoWood]

Hello,
We are using Jenkins to run CI tests, which will use ssh to run ios-sim. Locally, ios-sim can be run successfully, but in ssh mode, it will show an segmentation fault:10 error. This will only happen in Xcode6, and when we are trying to launch iOS8 device. Could someone please take a look? Thanks in advance.

[j2ali]

I am having a similar issue with Xcode6 and iOS8 simulator except I get

Segmentation fault: 11 ios-sim launch

Here is my log

/bin/sh -c /Users/jali/jenkins/workspace/LogicTest/build/Wattpad.build/Testing-iphonesimulator/WattpadLogicTests.build/Script-79A05A6418B5476800E8405E.sh
sh: line 1: 22591 Segmentation fault: 11  ios-sim launch "/Users/jali/jenkins/workspace/CurrentBuildOutput/Wattpad.app" --setenv DYLD_INSERT_LIBRARIES="/../../Library/PrivateFrameworks/IDEBundleInjection.framework/IDEBundleInjection" --setenv XCInjectBundle="/Users/jali/jenkins/workspace/CurrentBuildOutput/WattpadLogicTests.xctest" --setenv XCInjectBundleInto="/Users/jali/jenkins/workspace/CurrentBuildOutput/Wattpad.app/Wattpad" --args -XCTest All /Users/jali/jenkins/workspace/CurrentBuildOutput/WattpadLogicTests.xctest > /Users/jali/jenkins/workspace/CurrentBuildOutput/ios_sim.out 2>&1

[j2ali]

@CiaoWood

I resolved the problem by making the jenkins slave war file run as a LaunchAgent instead of a LaunchDaemon

[CiaoWood]

@j2ali

Did you mean starts a slave by launching an agent program through JNLP?

[shazron]

#101 merged, new version should be uploaded soon

[shazron]

ios-sim 3.0 is out on npm. Xcode 6 only. Try it out.

[CiaoWood]

I have tried ios-sim 3.0, it still show Segmentation fault: 11

[smarcum720]

I'm seeing the same thing. ios-sim 3.0 works fine in a normal session but gives a segfault when run over ssh.

[thunderweasel]

Having the same issue with the 3.0 version. Verbose output is:

App Spec: <DTiPhoneSimulatorApplicationSpecifier 0x7fef027073e0> specified by app path /Users/pivotal/jenkins-slave/jenkins-slave/workspace/iOS_Specs_iPhone/tracker-ios/build/Debug-iphonesimulator/UISpecs.app
SDK Root: <DTiPhoneSimulatorSystemRoot 0x7fef02704f90> path=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk
Creating named pipe at `/var/folders/sg/gr8s5kh94kl8r7wltndzp2qm0000gn/T//ios-sim-stderr-pipe-1411509326'
Creating named pipe at `/var/folders/sg/gr8s5kh94kl8r7wltndzp2qm0000gn/T//ios-sim-stdout-pipe-1411509326'
using device family iphone
Segmentation fault: 11

[CiaoWood]

I found the Xcode6 do not have a DVTiPhoneSimulatorRemoteClient.framework, is it possible to have any relation with this?

[CiaoWood]

It seems the ios-sim crashes during the launching. Here is the crash log:

Process: ios-sim [50842]
Path: /Users/USER/*/ios-sim
Identifier: ios-sim
Version: ???
Code Type: X86-64 (Native)
Parent Process: bash [50836]
Responsible: ios-sim [50842]
User ID: 505

Date/Time: 2014-09-25 16:32:24.713 +0800
OS Version: Mac OS X 10.9.4 (13E28)
Report Version: 11
Anonymous UUID: 5B93D748-34D7-6F3C-0F9C-68C529331A9F

Crashed Thread: 0 Dispatch queue: com.apple.main-thread

Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000018

VM Regions Near 0x18:
-->
__TEXT 000000010129e000-00000001012a7000 [ 36K] r-x/rwx SM=COW /Users/USER/*

Application Specific Information:
objc_msgSend() selector name: respondsToSelector:

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libobjc.A.dylib 0x00007fff90856097 objc_msgSend + 23
1 com.apple.CoreFoundation 0x00007fff92d6a9ad __CFCopyFormattingDescription + 269
2 com.apple.CoreFoundation 0x00007fff92d68a39 __CFStringAppendFormatCore + 6649
3 com.apple.CoreFoundation 0x00007fff92d8ea71 CFStringCreateWithFormatAndArguments + 113
4 ios-sim 0x00000001012a1a60 nsvfprintf + 34 (nsprintf.m:11)
5 ios-sim 0x00000001012a1bf5 nsprintf + 164 (nsprintf.m:37)
6 ios-sim 0x00000001012a06b6 -[iPhoneSimulator launchApp:withFamily:uuid:environment:stdoutPath:stderrPath:timeout:args:] + 1688 (iPhoneSimulator.m:463)
7 ios-sim 0x00000001012a174d -[iPhoneSimulator runWithArgc:argv:] + 2909 (iPhoneSimulator.m:742)
8 ios-sim 0x00000001012a1a0b main + 101 (main.m:23)
9 ios-sim 0x000000010129ee18 start + 52

Thread 1:: Dispatch queue: com.apple.libdispatch-manager
0 libsystem_kernel.dylib 0x00007fff8f9ab662 kevent64 + 10
1 libdispatch.dylib 0x00007fff8a1fb421 _dispatch_mgr_invoke + 239
2 libdispatch.dylib 0x00007fff8a1fb136 _dispatch_mgr_thread + 52

Thread 2:
0 libsystem_kernel.dylib 0x00007fff8f9aae6a __workq_kernreturn + 10
1 libsystem_pthread.dylib 0x00007fff90c9df08 _pthread_wqthread + 330
2 libsystem_pthread.dylib 0x00007fff90ca0fb9 start_wqthread + 13

Thread 3:
0 libsystem_kernel.dylib 0x00007fff8f9aae6a __workq_kernreturn + 10
1 libsystem_pthread.dylib 0x00007fff90c9df08 _pthread_wqthread + 330
2 libsystem_pthread.dylib 0x00007fff90ca0fb9 start_wqthread + 13

Thread 4:
0 libsystem_kernel.dylib 0x00007fff8f9aae6a __workq_kernreturn + 10
1 libsystem_pthread.dylib 0x00007fff90c9df08 _pthread_wqthread + 330
2 libsystem_pthread.dylib 0x00007fff90ca0fb9 start_wqthread + 13

Thread 0 crashed with X86 Thread State (64-bit):
rax: 0x00007fd2a944a9b0 rbx: 0x00007fff90856169 rcx: 0x00007fff9227d08f rdx: 0x00007fd2a944a9b0
rdi: 0x00007fff90856169 rsi: 0x00007fff9227d08f rbp: 0x00007fff5e95fc30 rsp: 0x00007fff5e95fc08
r8: 0x0000000000000000 r9: 0x0000000000000f60 r10: 0x00007fff9227d08f r11: 0x0000000000000000
r12: 0x00007fff5e960010 r13: 0x00007fff5e9607b0 r14: 0x0000000000000000 r15: 0x00007fff5e960010
rip: 0x00007fff90856097 rfl: 0x0000000000010206 cr2: 0x0000000000000018

Logical CPU: 0
Error Code: 0x00000004
Trap Number: 14

[mdeletrain]

I think this issue can be merged with #119

Here is what I wrote about it :
I've got the exact same problem on Mavericks using XCode 6, but only when I start the ios-sim from a ssh shell (whether an instance of the simulator is already running or not) or from an instance of Jenkins started from a LaunchAgent.

Looking at the code in iPhoneSimulator.m, there are 3 issues :

• Line 463, the call to nsprintf does not check if error is nil or not, which causes the crash
• Line 376 the error variable is not initialized to nil
• The call to [session requestStartWithConfig:config timeout:timeout error:&error] exits returning false and without setting the error variable

Then the fix has two steps :

• Add missing check and initialization
• Find why calling [session requestStartWithConfig:config timeout:timeout error:&error] fails without error

Hope that helps !

[mdeletrain]

@CiaoWood : I thought missing DVTiPhoneSimulatorRemoteClient.framework was the culprit, but the call in iPhoneSimulator.m line 456 :

session = [[[[self FindClassByName:@"DVTiPhoneSimulatorSession"] alloc] init] autorelease];

Does indeed return a non-nil object...

[michmerr]

I'm seeing what might be the same, or a related, issue when running 3.0 in a Jenkins job. The command works from the command line, but within the Jenkins job it fails, returning result code 139 immediately after "using device family iphone".

[info based on old logs removed]

Once I added null value checks, I found that it's returning a non-nil session object and is not setting the error value (confirming what mdeletrain found). So, with nil checking I get a simple failure rather than the 139 result code.

[shazron]

http://openradar.io/18321293

From here: http://status.travis-ci.com/incidents/y9pysslbxb79 they suggest "Due to a permissions change in iOS 8/Xcode 6, the iOS simulator is no longer starting when launched by a process that is run from SSHd. This issue has been reported to Apple but is unlikely to be fixed anytime soon. You can read more about it here: http://openradar.io/18321293"

[finthamoussu]

Just to let you know a workaround that works for me, you can call ios-sim from Apple Script over ssh like this: osascript -e 'tell application "Terminal" to do script "ios-sim ..."'. Hope this helps.