Weblogic segmentation fault on AIX

Question

My client has managed to find a bug in the JVM - version 1.4 for AIX. A coredump is available on request. The error is given by weblogic below:
JVMDG217: Dump Handler is Processing Signal 11 - Please Wait.
JVMDG303: JVM Requesting Java core file
JVMDG304: Java core file written to /weblogic/user_projects/domains/mccdomain/javacore71260.1131115420.txt
JVMDG215: Dump Handler has Processed Exception Signal 11.
/weblogic/user_projects/domains/mccdomain/startWebLogic.sh[67]: 71260 Segmentation fault(coredump)
java full version "J2RE 1.4.2 IBM AIX build ca142sr1a-20050209"
Thanks and Regards
Joseph.

Answer 1

Sorry, I misunderstood the original question. I thought it was the C compiler (not the C++ compiler) that you were using. The problem you're seeing (I believe) is due to the fact that you're trying to modify static data. The initialization of the character pointer variable 's' creates a pointer to read only (static) data. When you try to change that data with the assignment, you get a segmentation violation.
If, instead, you were to initialize the 's' variable as follows:
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
main() {
   char* r ;
   char s[] = "NONE,SITE,PANEL";
/*   char *s = "NONE,SITE,PANEL"; */
   if(r = strchr(s, ',' )) {
      *r = '\0' ; //segmentation fault here, how to solve
}The program would work as expected. This is because 's' now points at writeable data. You can see this by compiling the source into assembly with the -S option:
% CC -S forum.cc
% cat forum.s
.section ".data",#alloc,#write
.LI5:
.ascii "NONE,SITE,PANEL\000"