void
x_cgo_init(G *g, void (*setg)(void*))
{
pthread_attr_t attr;
size_t size;
void *handle;
setg_gcc = setg;
pthread_attr_init(&attr);
pthread_attr_getstacksize(&attr, &size);
g->stackguard = (uintptr)&attr - size + 4096;
pthread_attr_destroy(&attr);
// Locate symbol for the system pthread_create function.
handle = dlopen("libpthread.so", RTLD_LAZY);
if(handle == NULL) {
fprintf(stderr, "dlopen: failed to load libpthread: %s\n", dlerror());
abort();
}
sys_pthread_create = dlsym(handle, "pthread_create");
if(sys_pthread_create == NULL) {
fprintf(stderr, "dlsym: failed to find pthread_create: %s\n", dlerror());
abort();
}
dlclose(handle);
tcb_fixup(1);
}
static void*
threadentry(void *v)
{
ThreadStart ts;
tcb_fixup(0);
ts = *(ThreadStart*)v;
free(v);
ts.g->stackbase = (uintptr)&ts;
/*
* _cgo_sys_thread_start set stackguard to stack size;
* change to actual guard pointer.
*/
ts.g->stackguard = (uintptr)&ts - ts.g->stackguard + 4096;
/*
* Set specific keys.
*/
setg_gcc((void*)ts.g);
crosscall_386(ts.fn);
return nil;
}
static void *
thread_start_wrapper(void *arg)
{
struct thread_args args = *(struct thread_args *)arg;
free(arg);
tcb_fixup(0);
return args.func(args.arg);
}
static void*
threadentry(void *v)
{
ThreadStart ts;
tcb_fixup(0);
ts = *(ThreadStart*)v;
free(v);
/*
* Set specific keys.
*/
setg_gcc((void*)ts.g);
crosscall_amd64(ts.fn);
return nil;
}
void
x_cgo_init(G *g, void (*setg)(void*))
{
pthread_attr_t attr;
size_t size;
setg_gcc = setg;
pthread_attr_init(&attr);
pthread_attr_getstacksize(&attr, &size);
g->stacklo = (uintptr)&attr - size + 4096;
pthread_attr_destroy(&attr);
if(pthread_once(&init_pthread_wrapper_once, init_pthread_wrapper) != 0) {
fprintf(stderr, "runtime/cgo: failed to initialize pthread_create wrapper\n");
abort();
}
tcb_fixup(1);
}
