topic Re: ERROR MESSAGE : Cannot access memory at address 0x3f 5d0268; Language : C++ in Operating System - HP-UX

ERROR MESSAGE : Cannot access memory at address 0x3f 5d0268; Language : C++

arun kumar v — Tue, 03 Dec 2002 06:39:00 GMT

Hi wizards,

We have a Wireless application [GSM] in which we have wriiten the code in C++ Lang on a HP-UX 10.20 platform and the Target HP Hardware is N-Class servers.

It's been reported that our application is coring sometimes.

And from the gdb traces, we see a line as:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
"Cannot access memory at address 0x3f 5d0268" and then it gets killed in malloc...

Please help me out in this regard.

Thanks in Advance,
Arun Kumar
Bangalore, INDIA.

Re: ERROR MESSAGE : Cannot access memory at address 0x3f 5d0268; Language : C++

Eugeny Brychkov — Tue, 03 Dec 2002 08:06:42 GMT

Arun,
are you sure you have 1GB of the main memory and at this location (0x3f5d0268=1,063,060,072) server does not have memory hole, ROM or any other locked area? If your server is out-of-memory then consider (at least try) to add more
Eugeny

Re: ERROR MESSAGE : Cannot access memory at address 0x3f 5d0268; Language : C++

Adam J Markiewicz — Tue, 03 Dec 2002 13:05:53 GMT

Hi.

What does exactly backtrace of the stack, when your process gets killed inside malloc? What signal kills the process?

If it's from malloc my first guess is that you corrupt memory somewhere. Try to use a tool to trace memory allocations and overwriting. Perheps you are using freed memory, or write after / before allocated block, corrupting malloc's free list.

Good luck

Adam