Getting more info about a heap corruption

[Roger Phillips <heidegg@hotmail.com>]

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Greetings,

currently I'm analysing a number of heap corruptions in a large application which usually results in a coredump and one of these malloc_printerr :

https://elixir.bootlin.com/glibc/glibc-2.31/source/malloc/malloc.c#L3744
malloc.c - malloc/malloc.c - Glibc source code (glibc-2.31) - Bootlin<https://elixir.bootlin.com/glibc/glibc-2.31/source/malloc/malloc.c#L3744>
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Problem is that variables needed for this check like victim, bck and next are optimized out and thus not accessible in gdb. Only av and its contents are accessible. I cannot use asan binaries as it is a production test. Changing environment variables is possible though.

So can you tell me if there is any sort of debugging functionality in glibc-2.31 that will show me those missing variables or narrow down the corrupted chunk?

Regards