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Re: XCode 3.1 frequently hangs

Subject: Re: XCode 3.1 frequently hangs
From: Aaron Burghardt <email@hidden>
Date: Wed, 30 Jul 2008 06:42:33 -0400
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Before you uninstall/reinstall, I have another suggestion. Since it is hanging on an lstat() call, it appears to be an issue that can be diagnosed at the file system level. Try using fs_usage to determine the path that is the problem, using my Terminal example below. WIth fs_usage running, recreate the symptom. When Xcode hangs, go back to the Terminal window and see what the last file path is. Since fs_usage is reporting the amount of time spent in the system call, I expect the lstat() that is causing the hang won't have returned yet. In that case, the menu command View -> Clear Scrollback will clear the Terminal window, and when the call does return, it should be at the top of the Terminal window buffer. The last numeric column is the time spent in the system call, so that will help determine which lstat() is the problem.

Also, looking at the backtrace, it appears Xcode is indexing the file you just edited. Can you comment out any single #include and affect the symptom?

# Get Xcode's PID $ ps aux | grep Xcode.app aburgh 48965 0.0 4.6 774920 191568 ?? S Mon09AM 20:33.92 /Developer/Applications/Xcode.app/Contents/MacOS/Xcode - psn_0_684199 aburgh 58869 0.0 0.0 599780 468 s005 R+ 6:01AM 0:00.00 grep Xcode.app

# Use the PID to limit fs_usage's output $ sudo fs_usage -f filesys 48965 | grep lstat 06:08:10 lstat k/System/Library/Frameworks/ IOKit.framework/Versions/A/Headers/usb/IOUSBLib.h 0.000021 Xcode 06:08:10 lstat /Volumes/test/MyProject/usbtest- Info.plist 0.000015 Xcode 06:08:10 lstat /Volumes/test/ MyProject 0.000004 Xcode 06:08:10 lstat sers/aburgh/Desktop/Another USB Notification Example/USBNotificationExample.c 0.000010 Xcode 06:08:10 lstat /System/Library/Frameworks/IOKit.framework/ Versions/A/Headers/IOCFPlugIn.h 0.000011 Xcode 06:08:10 lstat /System/Library/Frameworks/IOKit.framework/ Versions/A/Headers/IOReturn.h 0.000009 Xcode

Aaron

On Jul 30, 2008, at 12:16 AM, Larry Emdur wrote:

On Tue, Jul 29, 2008 at 1:18 PM, Andrew Pontious <email@hidden> wrote:
On Jul 26, 2008, at 1:35 PM, Larry Emdur wrote:
The most interesting part of the sample is this:
1070 -[XCInvocationQueue _processInvocationsInThreadSlotNumber:] 1070 -[XCInvocationQueue _processNextInvocationInThreadSlotNumber:] 1070 -[NSInvocation invoke] 1070 __invoking___ 1070 -[PBXProjectIndex _indexBackground:] 1070 -[PBXDevKitIndexingEngine indexFileAtAbsolutePath:withSettings:] 1070 ObjcParse::ObjcParse(TokenStream*, ParseErrorStream*, ObjcActions*, int) 1070 ObjcParse::nextToken() 1070 Cpp::nextToken() 1070 Cpp::nextToken0() 1070 Cpp::header(Token*, TokenType) 1070 Cpp::sysStream(char const*, TokenType, signed char) 1070 PBXIndexCppActions::getSystemPathForHeader(char const*, char*) 1070 - [NSString(TSPathUtilities) PBX_stringByResolvingSymlinksInPath] 1070 - [NSString(NSPathUtilities) _stringByResolvingSymlinksInPathUsingCache:] 1070 lstat 1070 lstat

It is 100% reproducible. I never saw this with xcode v3.0.
This code generally hasn't changed between 3.0 and 3.1.
Can you try 3.0 on the same machine with the same projects, and see if it reoccurs?
Sure, where can I download 3.0?
Is your source code accessed over a network?
No, it is all local (on a single disk)
Thanks,
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Follow-Ups:
- Re: XCode 3.1 frequently hangs
  - From: Andrew Pontious <email@hidden>

References:
	>Re: XCode 3.1 frequently hangs (From: Greg Guerin <email@hidden>)
	>Re: XCode 3.1 frequently hangs (From: Larry Emdur <email@hidden>)
	>Re: XCode 3.1 frequently hangs (From: Andrew Pontious <email@hidden>)
	>Re: XCode 3.1 frequently hangs (From: "Larry Emdur" <email@hidden>)

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