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Monday, May 12th 2008, 10:48am
RE: How do I rectify this segmentation fault
probably accessing a uninitialized pointer
you could, for instance, obtain such an error with
or
or
or ... many other erronous code
compile with debug
verify a core file is generated
if not, parameter your Linux (I don't remember exactly where)
- /etc/sysctl.conf
kernel.core_pattern
kernel.core_uses_pid
- ~/.bashrc
ulimit -c unlimited
rerun
after crash run: kdbg|gdb yourApp generatedCoreFile
you will obtain a call stack, be abble to move in this call stack and to examine variables at crash time
you could, for instance, obtain such an error with
|
Source code |
1 2 3 |
int * a = NULL; // ... *a = 0; |
or
|
|
Source code |
1 2 3 4 5 |
int * a = new int; // ... delete a; // ... *a = 0; |
or
|
|
Source code |
1 2 3 |
int * a = new int [10]; // ... a[12] = 0; |
or ... many other erronous code
compile with debug
verify a core file is generated
if not, parameter your Linux (I don't remember exactly where)
- /etc/sysctl.conf
kernel.core_pattern
kernel.core_uses_pid
- ~/.bashrc
ulimit -c unlimited
rerun
after crash run: kdbg|gdb yourApp generatedCoreFile
you will obtain a call stack, be abble to move in this call stack and to examine variables at crash time
Nicolas
This post has been edited 5 times, last edit by "Nicolas SOUCHON" (May 12th 2008, 11:49am)