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Re: [PATCH] Support -z initfirst for multiple shared libraries

On 04/29/2016 04:11 AM, Kostya Serebryany wrote:




I'm myself pretty sure that people would generally prefer to avoid
reimplementing parts of Glibc (symbol resolver in particular). Let's see
if
Kostya has something to say.




Hm? To say about what? :)
We almost never use asan as a DSO on Linux, so we don't get any problems
like this.



Just to clarify: you mean you don't ASan DSO dependencies (libc,
libpthread, librt, etc.) to be initialized before ASan initialization (i.e.
__asan_init) runs? In that case the OP's patch would work for ASan DSO.

No, I mean that we don't use asan.so, only asan.a, which calls __asan_init

from the pre-init array.
Right but preinit gets called prior to library ctors which means that __asan_init indeed does not depend on libc initializers to be completed. 

-Y
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