Bug 209903 - kdeinit4 4.3.2 (macports / snow leopard) crash
Summary: kdeinit4 4.3.2 (macports / snow leopard) crash
Alias: None
Product: kdelibs
Classification: Unclassified
Component: kdeinit (show other bugs)
Version: 4.3
Platform: Compiled Sources macOS
: NOR crash (vote)
Target Milestone: ---
Assignee: kdelibs bugs
Depends on:
Reported: 2009-10-08 20:28 UTC by Joseph Wenninger
Modified: 2011-02-15 02:05 UTC (History)
5 users (show)

See Also:
Latest Commit:
Version Fixed In:

Patch to work around kdeinit4 crash (1.59 KB, patch)
2009-10-13 13:23 UTC, Jeremy Lainé
Also avoid crashing when loading libraries (5.16 KB, patch)
2009-10-14 19:37 UTC, Jeremy Lainé

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Description Joseph Wenninger 2009-10-08 20:28:03 UTC
Version:            (using Devel)
OS:                OS X
Installed from:    Compiled sources

Process:         kdeinit4 [42916]
Path:            /Applications/MacPorts/KDE4/kdeinit4.app/Contents/MacOS/kdeinit4
Identifier:      kdeinit4
Version:         ??? (???)
Code Type:       X86-64 (Native)
Parent Process:  kdeinit4 [42695]

Date/Time:       2009-10-08 20:01:30.938 +0200
OS Version:      Mac OS X 10.6.1 (10B504)
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

Thread 0 Crashed:  Dispatch queue: com.apple.main-thread
0   libSystem.B.dylib             	0x00007fff80af1ff6 __kill + 10
1   libSystem.B.dylib             	0x00007fff80b93072 abort + 83
2   ...ple.CoreServices.CarbonCore	0x00007fff87ae89c5 SCSessionUniverseClientDeath + 0
3   ...ple.CoreServices.CarbonCore	0x00007fff87a25d34 _SCSessionUniverseByUIDAcquireAndLock + 70
4   ...ple.CoreServices.CarbonCore	0x00007fff87a254f7 FSNodeStorageGetAndLockCurrentUniverse + 188
5   ...ple.CoreServices.CarbonCore	0x00007fff87a2c2f6 FileIDTreeGetVRefNumForDevice + 39
6   ...ple.CoreServices.CarbonCore	0x00007fff87a2c261 FSMount::FSMount(unsigned int, FSMountNumberType, short*) + 73
7   ...ple.CoreServices.CarbonCore	0x00007fff87a2a931 PathGetObjectInfo(char const*, unsigned int, unsigned int, short*, unsigned int*, unsigned int*, char*, unsigned int*, unsigned char*) + 296
8   ...ple.CoreServices.CarbonCore	0x00007fff87a2a760 FSPathMakeRefInternal(unsigned char const*, unsigned int, unsigned int, FSRef*, unsigned char*) + 114
9   com.apple.CoreFoundation      	0x00007fff8182133d _CFGetFSRefFromURL + 829
10  com.apple.CoreFoundation      	0x00007fff81820ff0 CFURLGetFSRef + 48
11  ...ple.CoreServices.CarbonCore	0x00007fff87a36808 GetUserDomainRootRef + 152
12  ...ple.CoreServices.CarbonCore	0x00007fff87a3668c GetDomainRootRef + 762
13  ...ple.CoreServices.CarbonCore	0x00007fff87a35fce ResolveSpecialFolder + 135
14  ...ple.CoreServices.CarbonCore	0x00007fff87a3557e FindFolderGuts + 648
15  ...ple.CoreServices.CarbonCore	0x00007fff87a4c747 ResolveRelativeFolder + 60
16  ...ple.CoreServices.CarbonCore	0x00007fff87a355ba FindFolderGuts + 708
17  ...ple.CoreServices.CarbonCore	0x00007fff87a352f3 FlndFolderGuts + 32
18  ...ple.CoreServices.CarbonCore	0x00007fff87a35280 FSFindFolder + 108
19  QtGui                         	0x00000001017acbca QDesktopServices::storageLocation(QDesktopServices::StandardLocation) + 106
20  libkdeui.5.dylib              	0x0000000100d577b1 KGlobalSettings::documentPath() + 33
21                                	0x0000000100007efe launch(int, char const*, char const*, char const*, int, char const*, bool, char const*, bool, char const*) + 1294
22                                	0x000000010000b911 main + 3057
23                                	0x0000000100006458 start + 52
Comment 1 Dario Andres 2009-10-08 23:20:07 UTC
Mh, it looks like a Qt issue.
- What are your Qt4 and KDE versions? (svn/git branch/revision) 
Comment 2 Joseph Wenninger 2009-10-09 13:38:47 UTC
"port search qt4-mac" tells 
cutecom-qt4-mac @0.20.0 (comms)
    Graphical serial terminal

qt4-mac @4.5.2 (aqua)
    Qt Tool Kit (Native Aqua Version)

qt4-mac-devel @4.5.0 (aqua)
    Qt Tool Kit (Native Aqua Version)

qt designer works though.

I've installed qt4 and qtcreator (from dmg images in parallel)
Comment 3 Jeremy Lainé 2009-10-13 13:23:10 UTC
Created attachment 37552 [details]
Patch to work around kdeinit4 crash

I have been able to work around kdeinit4 crashing using the attached patch. Basically as of OS/X 10.6 there are a number of functions which you can no longer call between the moment you fork() and the moment you exec().

However, this does not make kdeinit4 functional: the child process it spawns, most notably klauncher seem to be broken. klauncher does not seem to be able to connect to DBus when run by kdeinit4, where as it connects to DBus just fine if I invoke it manually (with --fd=<SOME_FD>).
Comment 4 Michaël Lhomme 2009-10-13 23:16:33 UTC
Same problem for me with Snow Leopard, Qt 4.5.2, DBus 1.2.16 and kdelibs 4.3.2
Comment 5 Jeremy Lainé 2009-10-14 19:37:48 UTC
Created attachment 37580 [details]
Also avoid crashing when loading libraries

My initial patch only avoided a crash when launching a program. It did not avoid a crash when a library is loaded and it's "kdemain()" invoked. The attached patch introduces a "kdeinit4_helper" executable which does the actual function call. That way the kdeinit4 process does its exec(), keeping OS/X happy.

This patch needs some fine tuning as platforms other than OS/X do not need this hack.
Comment 6 David Faure 2009-11-13 23:44:56 UTC
I would much rather see mac and windows use the same code path in kinit/klauncher (launching apps directly rather than via fork+exec), to avoid a 3rd code path to maintain.
Something like http://www.davidfaure.fr/2009/klauncher_mac.diff

For the launching of kioslaves I had suggested something like

Apparently these patches don't fully work; I couldn't test them myself (no mac here). Just "proofs of concepts".
Comment 7 Till Adam 2011-02-09 18:12:50 UTC
Fixed in master and 4.6 with 19f4bf0c212a28e79ef9b8d0cb35068951e58a85 based on David's ideas.
Comment 8 David Faure 2011-02-15 02:05:42 UTC
Git commit cb0e915925fc8a854c31b416b33f43e794f11119 by David Faure. on behalf of Till Adam
Committed on 06/02/2011 at 20:48.
Pushed by dfaure into branch 'KDE/4.6'.

Make the KProcess mode for KIO also usable on OSX and use it.

On OSX, as of 10.6, one cannot fork with out exec'ing, more or less,
which makes the way kdeinit works problematic. In order not to introduce
yet another code path, this makes the so far Windows specific way of
handling kio processes via KProcess, instead of kdeinit available
more generically and uses it on OSX as well. This is based on
proof of concept patches by David Faure.

CCBUG: 209903
(cherry picked from commit 19f4bf0c212a28e79ef9b8d0cb35068951e58a85)

M  +10   -3    kinit/kioslave.cpp     
M  +39   -18   kinit/klauncher.cpp     
M  +7    -7    kinit/klauncher.h     
M  +3    -3    kinit/klauncher_main.cpp