void
syscall_cgocallback ()
{
M *mp;
mp = runtime_m ();
if (mp == NULL)
{
runtime_needm ();
mp = runtime_m ();
mp->dropextram = true;
}
runtime_exitsyscall (0);
if (runtime_m ()->ncgo == 0)
{
/* The C call to Go came from a thread not currently running any
Go. In the case of -buildmode=c-archive or c-shared, this
call may be coming in before package initialization is
complete. Wait until it is. */
chanrecv1 (NULL, runtime_main_init_done, NULL);
}
mp = runtime_m ();
if (mp->needextram)
{
mp->needextram = 0;
runtime_newextram ();
}
}
void
_cgo_panic (const char *p)
{
intgo len;
unsigned char *data;
String *ps;
Eface e;
const struct __go_type_descriptor *td;
runtime_exitsyscall (0);
len = __builtin_strlen (p);
data = alloc_saved (len);
__builtin_memcpy (data, p, len);
ps = alloc_saved (sizeof *ps);
ps->str = data;
ps->len = len;
td = &string_type_descriptor;
memcpy(&e._type, &td, sizeof td); /* This is a const_cast. */
e.data = ps;
/* We don't call runtime_entersyscall here, because normally what
will happen is that we will walk up the stack to a Go deferred
function that calls recover. However, this will do the wrong
thing if this panic is recovered and the stack unwinding is
caught by a C++ exception handler. It might be possible to
handle this by calling runtime_entersyscall in the personality
function in go-unwind.c. FIXME. */
__go_panic (e);
}
void *
_cgo_allocate (size_t n)
{
void *ret;
runtime_exitsyscall (0);
ret = alloc_saved (n);
runtime_entersyscall (0);
return ret;
}
void
syscall_cgocalldone ()
{
G* g;
g = runtime_g ();
__go_assert (g != NULL);
--g->ncgo;
if (g->ncgo == 0)
{
/* We are going back to Go, and we are not in a recursive call.
Let the garbage collector clean up any unreferenced
memory. */
g->cgomal = NULL;
}
/* If we are invoked because the C function called _cgo_panic, then
_cgo_panic will already have exited syscall mode. */
if (g->status == Gsyscall)
runtime_exitsyscall ();
}
void
runtime_testing_exitsyscall()
{
runtime_exitsyscall();
}
void
syscall_cgocallback ()
{
runtime_exitsyscall ();
}
