Can anyone tell me what this error means?

Professor_Smith · November 2014

Hello,

Can anyone tell me what this error means, in relation to running a Battlefield 1942 Dedicated Server using Linux?

./start.sh: using dynamically linked binary

*** glibc detected *** ./bf1942_lnxded: munmap_chunk(): invalid pointer: 0x09ea9fa8 ***

======= Backtrace: =========

/lib/i386-linux-gnu/i686/cmov/libc.so.6(+0x70c91)[0xf7570c91]

/lib/i386-linux-gnu/i686/cmov/libc.so.6(+0x71f0e)[0xf7571f0e]

./bf1942_lnxded[0x834882c]

./bf1942_lnxded[0x826e94a]

./bf1942_lnxded[0x82c825f]

./bf1942_lnxded[0x8360517]

./bf1942_lnxded[0x83ed5aa]

./bf1942_lnxded[0x83f0fca]

./bf1942_lnxded[0x83f3b7d]

./bf1942_lnxded[0x80620ab]

./bf1942_lnxded[0x8062cae]

./bf1942_lnxded[0x8138ea6]

./bf1942_lnxded[0x813a582]

./bf1942_lnxded[0x80cb3f7]

./bf1942_lnxded[0x80c594b]

./bf1942_lnxded[0x80c270c]

./bf1942_lnxded[0x80577e5]

/lib/i386-linux-gnu/i686/cmov/libc.so.6(__libc_start_main+0xe6)[0xf7516e46]

./bf1942_lnxded(_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c+0x55)[0x8052ad1]

-------------------------------------------------------------------------------------------

The server is running debian 7 in a xen environment and other c++ based servers run fine.

Thank You,

Joshua

Professor Smith

saqman2060 · November 2014

I like questions like this. I hope someone who is more an expert in program debugging can jump in and help.

Did some research, and, it appears that this pointer "0x09ea9fa8" is pointing to something that cannot be used. It could be memory, or, a location to some other function that the system can't access.

Here is some explanation of dynamically linked libraries:

http://en.wikipedia.org/wiki/Dynamic_linker

Someone experienced a similar issue:

http://stackoverflow.com/questions/20297524/c-free-invalid-pointer

Here, a person was told of a debugger they could use to process this error:

http://stackoverflow.com/questions/151268/how-to-force-abort-on-glibc-detected-free-invalid-pointer

Here is my educational guess. The dynamically linked library "glibc" is being used on this program ./bf1945_Inxded that has this header, munmap_chunk() that is using a bad pointer to either memory or another function. More than likely, it is pointing to a memory location that should not be used.

You have to find what that pointer is and fix it. Try using the debug tool to debug it.
http://valgrind.org/

Can anyone tell me what this error means?

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