On Mon, Aug 18, 2014 at 7:33 AM, Henri Kemppainen <[email protected]> wrote:
> Hi, I encountered this problem while trying an application that uses SDL2. > It turns out that SDL2 opens, closes, and reopens some shared objects from > the X11 sets. And doing that in the specific order it does, one of the > eventual dlopen calls will crash. Here's a minimal test case: ... > There are some other combinations of shared objects that will also result > in > the same crash. It can be worked around by changing the order in which > they > are opened or closed (changing both works too). Nothing in the man page > suggests to me that the order should be critical, so this looks like a bug. > Yep. I might dig deeper once I find the time, but perhaps someone already > familiar with the code might want to take a look at it before I waste a > week on it ;-) > The issue is the change in ld.so/library_subr.c rev 1.34. If you back that change out, the crash disappears. The problem is that no one makes changes to the linkages inside ld.so out of boredom: there was some previous program that crashed without that change, but the details weren't documented or preserved in a regress/ program. I've made a couple stabs at reproducing the original program so that we can be sure to keep it fixed when fixing this, but haven't been able to pin down a case where the committed change solved the problem. If you can figure that out, I would gladly buy you a beer or three. Elsewise we're reaching the point where we back that change out and wait for someone complain... :-( Philip Guenther
