Re: Setting watchpoints in GDB
Re: Setting watchpoints in GDB
- Subject: Re: Setting watchpoints in GDB
- From: Paul Sargent <email@hidden>
- Date: Sun, 24 Oct 2004 23:59:12 +0100
On 24 Oct 2004, at 20:53, Jonas Maebe wrote:
On 24 okt 2004, at 18:42, Paul Sargent wrote:
So I thought I'd set a watchpoint on the pointer stored in my class. Looking through the whole of the Xcode UI and the Xcode documentation I can see no mention of watchpoints. So, after hitting a breakpoint in my init routine, I set one up using the gdb console command 'watch <expression>', then hit continue. At which point my Cocoa app just freezes, and I'm unable to interrupt execution using the pause button in Xcode. The only thing to do is to kill the process.
The most reliable way to work with watchpoints in gdb (on any platform) is (in my experience):
p &<expression>
watch *(int*)<value printed as result of previous command>
Otherwise you get problems with variables going out of scope etc. Change "(int*)" to whatever the type of the data you are watching.
I really wasn't expecting that to work but it did. Thanks
Thing is..... OMG how slow is it? It says it's adding a hardware watchpoint. If that's hardware.....!!!!! I have a feeling what I was seeing before as a hang was just a
very slow running program.
Anyway, it did the job.
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