2013/12/5 Fanael Linithien <[email protected]>: > I came up with a patch that fixes the issue for me. > > The patch replaces the global critical section with a spinlock. > Critical sections require explicit initialization before use, which in > this case is not possible: register_frame_ctor (from libgcc), which > runs BEFORE enter_global_cs, tries to lock a mutex, which requires a > spinlock, which needs to be initialized in static_spin_init, which > tries to enter the global critical section, which is not initialized. > The result is a segfault somewhere in ntdll. > > register_frame_ctor has constructor priority of 0, so setting the > priority of global_spin_ctor wouldn't cut it. > > > I'm not sure what is the official way to send patches, so I'm posting it here.
Nice catch. This describes at least the runtime-failure we got reported. Did you tested regressions for this patch? The only thing about using memory-based spinlocking is that we might introduce race-condtion. So we should at least verify for this. Kai ------------------------------------------------------------------------------ Sponsored by Intel(R) XDK Develop, test and display web and hybrid apps with a single code base. Download it for free now! http://pubads.g.doubleclick.net/gampad/clk?id=111408631&iu=/4140/ostg.clktrk _______________________________________________ Mingw-w64-public mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mingw-w64-public
