On 2015-09-18 11:43, ponce wrote:
Much success.
Not only did this work, it worked (around) right away!
Final patch here:
https://github.com/p0nce/dplug/commit/7dc6385ebb8147cc53cfe69bfd54e41f5341e158
The way it behaves is that the runtime uses a function to register the a
callback which is called by the dynamic linker each time an image
(dynamic library/exectuable) is loaded.
When the callback points to a function that itself is located in a
dynamic library it will cause dlopen to crash if the dynamic library has
been unloaded because the callback is not valid anymore.
For some reason it's not possible to unregister a callback.
When "dyld_register_image_state_change_handler" is used instead, it pins
the dynamic library which contains the callback and it's actually never
unloaded, even though dlclose is called.
So when dyld_register_image_state_change_handler is called from you're
plugin it pins the dynamic library and the callback register in the
runtime will still be valid.
--
/Jacob Carlborg
