Re: Expanding "this" kills my application
Re: Expanding "this" kills my application
- Subject: Re: Expanding "this" kills my application
- From: Jim Ingham <email@hidden>
- Date: Thu, 6 Dec 2007 13:36:46 -0800
You app may have "disappeared" because gdb crashed. Usually you will
see some banner to that effect in the Xcode UI, but maybe something
else overwrote that before you got a chance to see it.
Check in ~/Library/Logs/CrashReporter
for a gdb-{i386,powerpc}-apple-darwin log file with a current date.
If you find that, then apparently printing some ivar of this is
causing gdb to crash. If so, please file a bug with the crash log.
Jim
On Dec 6, 2007, at 11:40 AM, Laurence Harris wrote:
On Dec 5, 2007, at 6:04 PM, Chris Espinosa wrote:
On Dec 5, 2007, at 2:49 PM, Laurence Harris wrote:
I'm trying to track down a problem in my application running in
Leopard. I get to a point where I stop in the debugger and I want
to view the member variables of the current object. I click the
disclosure triangle for "this," and about two seconds later my
application disappears. This is consistent. Any ideas?
Turn off Data Formatters, first. If that makes your app
survivable, that narrows it down.
It doesn't. No difference.
Check to see whether there's anything in Console.app's
CrashReporter folder under your app's name. If there are
backtraces there it may help us figure out what is actually crashing.
Nothing for these crashes, it just disappears. I'm trying to track
down a crash in PlotIconRef, which appears to be the result of a bad
IconRef. It just started in Leopard, and I don't know if it's a
problem Leopard has exposed in my application or if it's a bug in
Leopard, so I'm stopping on a breakpoint before my code that gets
the IconRef is called.
Larry
In order to get access to your app's data values, Xcode's data
formatters run in your app's process space, so they're subject to
all the vagaries of any running code. You could have a bug that's
smashing the data formatters. You could have a bad value for a
local variable or argument that causes some underlying routine to
crash when trying to interpret it (data formatters need to be as
fast as possible, so they're not terrifically hardened against bad
values).
Chris
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