Checking threads on ppc - Pike-devel

25 Nov 2003


      When ppc machine code is used, this program won't terminate:
int do_work = 1, rounds;
void work() {
      while (do_work) {
    rounds++;
      }
    }
int main() {
      for (int i = 0; i < 5; i++)
    Thread.thread_create (work);
      sleep (10);
      do_work = 0;
      sleep (1);
      werror ("rounds: %d\n", rounds);
    }
The reason is that it uses OPCODE_INLINE_BRANCH and doesn't generate
the appropriate calls to check_threads_etc() on backward jumps after
branch opcodes. (Normally the opcodes do that themselves since they
have the address to jump to.)