I solved the problem that I posted to this list yesterday. But I am not sure if it's my mistake or a bug in swarm. The problem was that I didn't have a +createBegin method for a subclass who has a member variable. Only the superclass (the Intermediary class) has the +createBegin method. I solved the problem by moving the member variable from the subclass to the superclass. I guess I can solve the problem by add a +createBegin method for all subclass too, instead of moving the member variable. I'll try that.
Hi everyone:
I've been using Swarm for sometime. However I hit a problem that I couldn't solve recently. I hope that somebody here can help me with it. I am running Swarm-2.2 the latest release under Windows XP. My program crashes and the crash seems to be related to malloc. I am sure that it's not because of insufficient memory. First here's the error message that I got from gdb:
Program received signal SIGSEGV, Segmentation fault.
0x0040131d in +[Intermediary createBegin:] (self=0x411440, _cmd=0x411f48,
aZone=0x107430a8) at intermediary.m:14
The crash happens at this statement:
obj->last_update_time = SSC_START_UPDATE_TIME;
where obj is of type Intermediary*, last_update_time is of type int, and SSC_START_UPDATE_TIME is a constant.
Using gdb I also found the memory for obj->last_update_time is not accessible. The reason that I think the crash is related to malloc is that at the time of crashing, I got the following stack from insight:
...
+[Intermediary createBegin:]
malloc
Also, my program used to crash at some malloc statements written by myself. Then I tried xmalloc, allocBlock. Still the program crashed at these statements. I thought I would avoid the problem by not using dynamic memory allocation and used static arrays instead. But, apparently, the prolem is still there. By the way, my Intermediary class contains a lot of member variables, maybe 50 of them. Does that matter?
Any help will be appreciated. Lots of thanks in advance.
Yifeng
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