Re: [Qemu-devel] longjmp in qemu

[Xin Tong]

anyone cares to answer. I appreciate it.

Thanks

Xin


On Sat, Jan 28, 2012 at 5:17 PM, Xin Tong <address@hidden> wrote:
> I am investigating what longjmp is used for in qemu.
>
> longjmp is used in a couple of places.
>
> 1.
>  void cpu_loop_exit(void)
> {
>     env->current_tb = NULL;
>     longjmp(env->jmp_env, 1);
> }
>
> cpu_loop_exit is called when there is an interrupt_request or exit_request
> pending
>
> 2.
> void cpu_resume_from_signal(CPUState *env1, void *puc)
> {
>    ...
>    longjmp(env->jmp_env, 1);
> }
>
> cpu_resume_from_signal is called in a couple of places, each of which
> suggests something faulty has happened. my guess is that it will get call
> when exceptions have occurred in the code cache. Am I right ?
>
>
> Thanks
>
>
> Xin
>
>
>