Nicholas Sherlock <n.sherlock@xxxxxxxxx> writes:
> I'm using GCC 3.4.4 on Cygwin on Windows XP. The following program:
>
> #include <pthread.h>
>
> int main() {
> pthread_t thread;
>
> void * task(void * arg) {
> return NULL;
> }
>
> pthread_create(&thread, NULL, task, NULL);
> pthread_join(thread, NULL);
>
> return 0;
> }
>
> only runs if DEP (Prevention of code execution on data pages) is
> turned off in Windows settings. I get a segfault if DEP is turned
> on. Is this a GCC problem, or a Cygwin problem?
On targets which require extra effort to enable stack execution, gcc
is supposed to enable it when it builds a trampoline for a nested
function. So in that sense it is a gcc problem.
I think this problem is fixed in the mainline gcc sources. At least,
I see support for calling VirtualProtect on a trampoline.
Ian
