What might this gdb output mean?

Question

Trying to create my first iPhone app that would play back audio. When I try to set up playback, messages like these appear in gdb:

=shlibs-removed,shlib-info=[num="54",name="AudioIPCPlugIn",kind="B",dyld-addr="0x2c2000",reason="dyld",requested-state="E",state="E",path="/System/Library/Extensions/AudioIPCDriver.kext/Contents/ Resources/AudioIPCPlugIn.bundle/Contents/MacOS/AudioIPCPlugIn", description="/System/Library/Extensions/AudioIPCDriver.kext/Contents/Resources/ AudioIPCPlugIn.bundle/Contents/MacOS/AudioIPCPlugIn",loaded_addr="0x2c2000",slide="0x2c2000",prefix=""]

=shlibs-removed,shlib-info=[num="55",name="AppleHDAHALPlugIn",kind="B",dyld-addr="0x2cb000",reason="dyld",requested-state="E",state="E",path="/System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/ AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn", description="/System/Library/Extensions/AppleHDA.kext/Contents/PlugIns/ AppleHDAHALPlugIn.bundle/Contents/MacOS/AppleHDAHALPlugIn",loaded_addr="0x2cb000", slide="0x2cb000",prefix=""]

Not being familiar with gdb, I'm interested to know in general what sort of problems these types of messages might refer to.

Answer 1

AFAIK, those are information message about unloaded dynamic libraries, i don't think it denotes any problem or error.

Answer 2

Those are informational messages from the system which let you know when a dynamic library gets unloaded from your executable. I presume that they occur in this case because you are perhaps doing a bit too much destructing (ie, unloading bundles, etc.) when you try to shut down your app's connection to CoreAudio.