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dyld error with Guard Malloc and LLDB
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dyld error with Guard Malloc and LLDB

  • Subject: dyld error with Guard Malloc and LLDB
  • From: Tony McDaniel <email@hidden>
  • Date: Wed, 22 Jun 2011 19:42:28 -0400
I noticed an odd glitch today with Xcode 4. If I have LLDB set as the debugger and enable Guard Malloc, I get an error in the console:
dyld: could not load inserted library:
but no library is listed.

Searching on Google indicated that this was a problem with libgmalloc.dylib. Setting the debugger to use GDB, everything works as expected, with no errors.

Following a suggestion on Google, I ran 'ps alxwwe | grep flowsolver' to find the environment variables in use for the process. I'm including both sets (LLDB and GDB) here:

LLDB:
501 42997 42996 0 31 0 2425532 208 - SX ?? 0:00.00 /Users/tony/Documents/School/ENCM5910_Flow Solver/flowsolver/build/Debug/flowsolver 13-node.ugrid DYLD_INSERT_LIBRARIES=/usr/lib/libgmalloc.dylib: DYLD_FRAMEWORK_PATH=/Users/tony/Documents/School/ENCM5910_Flow Solver/flowsolver/build/Debug NSUnbufferedIO=YES DYLD_LIBRARY_PATH=/Users/tony/Documents/School/ENCM5910_Flow Solver/flowsolver/build/Debug/Developer/Library/Xcode/PrivatePlugIns/DebuggerFoundation.ideplugin/Contents/Resources/DebuggerIntrospectionSupport.dylib PWD=/Users/tony/Documents/School/ENCM5910_Flow Solver/flowsolver/build/Debug

GDB:
501 43052 43044 0 31 0 2426988 584 - SX ?? 0:01.62 /Users/tony/Documents/School/ENCM5910_Flow Solver/flowsolver/build/Debug/flowsolver 13-node.ugrid SHELL=/bin/bash TMPDIR=/var/folders/MW/MW0csM3KFw4x7EFi7QjDXU+++TI/-Tmp-/ Apple_PubSub_Socket_Render=/tmp/launch-UF8O1w/Render USER=tony COMMAND_MODE=unix2003 SSH_AUTH_SOCK=/tmp/launch-jn1NyW/Listeners __CF_USER_TEXT_ENCODING=0x1F5:0:0 PATH=/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin PWD=/Users/tony/Documents/School/ENCM5910_Flow Solver/flowsolver/build/Debug SHLVL=0 HOME=/Users/tony PYTHONPATH=/Developer/Library/PrivateFrameworks/LLDB.framework/Versions/A/Resources/Python:/Developer/Library/PrivateFrameworks/LLDB.framework/Versions/A LOGNAME=tony DISPLAY=/tmp/launch-lAyAY8/org.x:0 LINES=24 COLUMNS=80 NSUnbufferedIO=YES DYLD_LIBRARY_PATH=/Users/tony/Documents/School/ENCM5910_Flow Solver/flowsolver/build/Debug DYLD_INSERT_LIBRARIES=/usr/lib/libgmalloc.dylib DYLD_FRAMEWORK_PATH=/Users/tony/Documents/School/ENCM5910_Flow Solver/flowsolver/build/Debug

One thing I noticed: In the LLDB info, /usr/lib/libgmalloc.dylib ends in a colon, which I believe would indicate that another location should be listed afterward. Also, the entry for DYLD_LIBRARY_PATH has a / between Debug and Developer, instead of a colon.

This is a fairly recent install of Xcode 4 on a new quad core MacBook Pro. Everything is up to date, Xcode 4.0.2, MacOS X 10.6.7.
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