void __testcancel()
{
if (!libc.has_thread_pointer) return;
pthread_t self = __pthread_self();
if (self->cancel && !self->canceldisable)
__cancel();
}
long (__syscall_cp)(syscall_arg_t nr,
syscall_arg_t u, syscall_arg_t v, syscall_arg_t w,
syscall_arg_t x, syscall_arg_t y, syscall_arg_t z)
{
pthread_t self;
long r;
if (!libc.has_thread_pointer || (self = __pthread_self())->canceldisable)
return __syscall(nr, u, v, w, x, y, z);
r = __syscall_cp_asm(&self->cancel, nr, u, v, w, x, y, z);
if (r==-EINTR && nr!=SYS_close && self->cancel && !self->canceldisable)
__cancel();
return r;
}
static void cancel_handler(int sig, siginfo_t *si, void *ctx)
{
pthread_t self = __pthread_self();
ucontext_t *uc = ctx;
const char *ip = ((char **)&uc->uc_mcontext)[CANCEL_REG_IP];
extern const char __cp_begin[1], __cp_end[1];
if (!self->cancel || self->canceldisable) return;
_sigaddset(&uc->uc_sigmask, SIGCANCEL);
if (self->cancelasync || ip >= __cp_begin && ip < __cp_end) {
self->canceldisable = 1;
pthread_sigmask(SIG_SETMASK, &uc->uc_sigmask, 0);
__cancel();
}
__syscall(SYS_tgkill, self->pid, self->tid, SIGCANCEL);
}
static void cancel_handler(int sig, siginfo_t *si, void *ctx)
{
pthread_t self = __pthread_self();
ucontext_t *uc = ctx;
uintptr_t sp = ((uintptr_t *)&uc->uc_mcontext)[CANCEL_REG_SP];
uintptr_t ip = ((uintptr_t *)&uc->uc_mcontext)[CANCEL_REG_IP];
if (!self->cancel || self->canceldisable) return;
_sigaddset(&uc->uc_sigmask, SIGCANCEL);
if (self->cancelasync || sp == self->cp_sp && ip <= self->cp_ip) {
self->canceldisable = 1;
pthread_sigmask(SIG_SETMASK, &uc->uc_sigmask, 0);
__cancel();
}
if (self->cp_sp)
__syscall(SYS_tgkill, self->pid, self->tid, SIGCANCEL);
}
long (__syscall_cp)(long nr, long u, long v, long w, long x, long y, long z)
{
pthread_t self;
uintptr_t old_sp, old_ip;
long r;
if (!libc.main_thread || (self = __pthread_self())->canceldisable)
return __syscall(nr, u, v, w, x, y, z);
old_sp = self->cp_sp;
old_ip = self->cp_ip;
self->cp_sp = 0;
self->cp_ip = 0;
r = __syscall_cp_asm(&self->cp_sp, nr, u, v, w, x, y, z);
self->cp_ip = old_ip;
self->cp_sp = old_sp;
if (r==-EINTR && nr!=SYS_close && self->cancel && !self->canceldisable)
__cancel();
return r;
}
void __testcancel()
{
pthread_t self = pthread_self();
if (self->cancel && !self->canceldisable)
__cancel();
}
