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

[arun kumar v]

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.

[Eugeny Brychkov]

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

[Adam J Markiewicz]

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