execution doesn't halt at breakpoints when debugging custom executable
execution doesn't halt at breakpoints when debugging custom executable
- Subject: execution doesn't halt at breakpoints when debugging custom executable
- From: "Martin S. Boswell" <email@hidden>
- Date: Fri, 30 Mar 2007 10:36:20 -0700
Xcode Users,
I'm trying to debug a custom executable for a vanilla C command-line
tool that is compiled with a makefile. The problem is that execution
does not halt/pause at breakpoints.
Although the problem originated in a different source set, for the
purposes of solving this problem, I'm trying to get this to work on a
very simple 10 line C file (at bottom). Using Mac OS X 10.4.9, Xcode
2.4.1 on a PowerMac G5 2x2.7 (same behavior on 2 other similar
machines).
When I follow the very simple procedure, execution does not halt at
the breakpoints - although "sound out and auto-continue" does work.
That is, I get the audio alert, but if I un-check the auto-continue
checkbox in the Breakpoint window, it will not pause. These are the
steps I take:
1) create a new empty project
2) add the executable to the Executables section of the Project
window
(see http://developer.apple.com/documentation/DeveloperTools/
Conceptual/XcodeUserGuide/Contents/Resources/en.lproj/
06_01_db_executable/chapter_39_section_4.html)
OK, now I should be able to set standard breakpoints to pause
execution. I set regular breakpoints and execution does not pause.
In the test program below, when execution reaches the scanf and waits
for input, I can click the pause button and examine source,
variables, etc. Breakpoints on any lines will not halt execution.
If I follow the same procedure on a 10.3.9 machine running Xcode 1.1,
it works fine, i.e. execution pauses at the breakpoints.
So, I've been unable to find any references to this problem
anywhere. Am I missing something? Is this a known problem? Any
other ideas? Thanks for taking the time to consider this.
- Martin
--
Martin S. Boswell
Center for Functional Imaging
Lawrence Berkeley National Laboratory
One Cyclotron Road, MS55R0121
Berkeley, CA 94720
email@hidden
Phone: (510) 486-6187
Fax: (510) 486-4768
-----------------------
Makefile:
all:
cc -g -O0 ron.c -o ron
-----------------------
ron.c file:
# include <stdio.h>
int main () {
int x = 14 ;
int y = 1 ;
int z ;
printf("line 1\n") ;
printf("line2\n") ;
printf("Enter Z: ") ;
scanf("%d", &z ) ;
printf("X value: %d, Y value: %d, Z value: %d\n", x, y, z) ;
return 0 ;
}
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