Re: C++ stack unwinding

Just to be more clear: I'd like stack unwinding to take place in *all* 
spawned threads, ideally without another set of bookkeeping state that's 
separate from what st already has to manage internally, and without 
requiring the user to use another API above ST (and only that API).

The closest solution I've come to so far involves creating another API 
on top of ST that will wrap all st_* calls (blocking ones in particular) 
in wrappers that throw exceptions on an error.  I then also wrap 
st_thread_create() in a wrapper that puts the new thread into a global 
list of threads, and also wraps the target function in a wrapper that 
calls st_thread_interrupt() on all other threads in the global list 
whenever an uncaught exception is thrown.

Yang Zhang wrote:
> The following simple C++ program does not end up calling the destructor 
> because the stack does not get unwound for the threads that aren't part 
> of the thread from which SIGABRT is called (by the uncaught exception). 
>  Is there a simple way to get stack unwinding to happen properly? Thanks 
> in advance.
> 
> #include <exception>
> #include <iostream>
> #include <st.h>
> using namespace std;
> 
> class cleanup {
>   public:
>     ~cleanup() { cout << "clean up" << endl; }
> };
> 
> void *f(void *) {
>   throw exception();
>   return NULL;
> }
> 
> int main() {
>   cleanup c;
>   st_init();
>   st_thread_t t = st_thread_create(&f, (void*)"abc", 1, 0);
>   st_thread_join(t, NULL);
>   return 0;
> }
> 


-- 
Yang Zhang
http://www.mit.edu/~y_z/

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