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Re: Seeking advice on writing a test [Re: [patch] Fix BZ 20419 -- stack overflow with huge PT_NOTE segment]
On 05/14/2018 01:31 AM, Paul Pluzhnikov wrote:
I wrote a program to generate DSO with that many Phdr[]s, and confirmed
that "ld.so --list foo.so" passes with default 8MiB stack, but crashes with
anything below 6600KiB with SIGSEGV due to stack overflow.
I think it's reasonable to expect "ld.so --list foo.so" to be able to run
successfully with 1MiB (or even 128K) stack.
Well, if those are LOAD segments, then with tight limits you will run
into VM limitations anyway. But I see your point.
My generator program is mostly machine independent, except it needs to set
e_ident[EI_DATA] and e_machine appropriately.
The easiest approach is to put this program and the test into
sysdeps/x86_64 and make this x86_64-only test. Would that be acceptable?
It should be a generic test is possible.
Could you read the required values from the ELF header of the current
executable?
Thanks,
Florian