I am using "Purify 126.96.36.199-008 070813 Linux (32-bit)" on CentOS and facing a peculiar problem. However, no issues seen if Purify is not used.
I noticed that, two global data structures are allocated overlapping memory due to which SW crashes whenever it tries to access these data structures. We have verified the addresses & size of these data-structures using readelf utility & also by printing the values immediately after entering in the main function.
I further notice multiple such linker warnings. Not sure - if these warnings are linked with above issue. If yes, then how to resolve it? Note that, no such warnings are seen when Purify is not used.
/usr/bin/ld: Warning: alignment 4 of symbol `gtt_mtpsap_list' in /tmp/data18092common_defs0_pure_p9_c0_108130844_32.o is smaller than 32 in /home/omkar/trunk/lib/libnsn_sgw_sccp_pure_p9_c0_108130844_32.a(gt_glob.o
Request you to share your feedback on the same.
-Thanks & Rgds
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3 replies Latest Post - 2012-10-31T22:00:47Z by SystemAdmin
Pinned topic Overlapping Memory Allocation for global data structures in C
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Updated on 2012-10-31T22:00:47Z at 2012-10-31T22:00:47Z by SystemAdmin
Re: Overlapping Memory Allocation for global data structures in C2012-10-30T16:53:26Z in response to SystemAdminHi Avadh,
Purify 188.8.131.52-008 dates back to 2007 and likely does not work on the version
of CentOS that you are using. See attached release notes for the version of
Purify that you are using. Notice that your version of Purify only supports
up to RHEL 5. (This would probably be equivalent to CentOS 5). Also, Purify
184.108.40.206-008 only supports up to gcc/g++ 4.2.
What OS version and compiler are you using?
Re: Overlapping Memory Allocation for global data structures in C2012-10-31T07:13:23Z in response to SystemAdminHi Don,
OS/compiler/Kernel versions from the machine is provided below:
Linux version: CentOS release 5.5 (Final)
GCC version: gcc version 4.1.2 20080704 (Red Hat 4.1.2-48)
Kernel version: 2.6.18-194.el5xen
We checked the document provided by you and as per it
- Supported version for gcc is 4.2 (gcc version at my m/c is an earlier one)
- RHEL 5 supported (As my m/c hosts centOS 5.5 - so this should be fine)
So, do you suspect gcc version to be an issue?
-Thanks & Rgds
Re: Overlapping Memory Allocation for global data structures in C2012-10-31T22:00:47Z in response to SystemAdminHi Avadh,
You will need to use PurifyPlus 220.127.116.11-002 (released 10/12/10) or
higher on Red Hat Enterprise Linux 5.5 (and/or CentOS 5.5). Older
releases will not work on RHEL/CentOS 5.5.