[LLVMdev] [PATCH] Add the disable_aslr option that will disable the address space layout randomization under AddressSanitizer on 10.6

Kostya Serebryany kcc at google.com
Fri Dec 9 11:02:51 PST 2011


Question to MacOS gurus: is there a way to disable ASLR (address space
layout randomization) on Darwin at link time
instead of doing setenv("DYLD_NO_PIE", "1", 1); and reexec?



On Fri, Dec 9, 2011 at 4:28 AM, Alexander Potapenko <glider at google.com>wrote:

> The attached patch introduces the disable_aslr option (off by default)
> and the corresponding AsanDisableAslr function that should disable the
> address space randomization.
> This is now implemented for Mac OS 10.6 only.
> In order to do this we add DYLD_NO_PIE=1 to the env and restart the
> program.
> Next steps to be done are:
>  -- check for MH_PIE bit -- if it is 0, we don't need to disable anything;
>  -- use posix_spawnattr_setflags() to set the _POSIX_SPAWN_DISABLE_ASLR on
> 10.7
>  -- disable ASLR on Linux, if needed.
> --
> Alexander Potapenko
> Software Engineer
> Google Moscow
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