int
__go_empty_interface_compare (struct __go_empty_interface left,
struct __go_empty_interface right)
{
const struct __go_type_descriptor *left_descriptor;
left_descriptor = left.__type_descriptor;
if (((uintptr_t) left_descriptor & reflectFlags) != 0
|| ((uintptr_t) right.__type_descriptor & reflectFlags) != 0)
__go_panic_msg ("invalid interface value");
if (left_descriptor == NULL && right.__type_descriptor == NULL)
return 0;
if (left_descriptor == NULL || right.__type_descriptor == NULL)
return 1;
if (!__go_type_descriptors_equal (left_descriptor,
right.__type_descriptor))
return 1;
if (__go_is_pointer_type (left_descriptor))
return left.__object == right.__object ? 0 : 1;
if (!left_descriptor->__equalfn (left.__object, right.__object,
left_descriptor->__size))
return 1;
return 0;
}
uint64_t
__go_receive_small_closed (struct __go_channel *channel, _Bool for_select,
_Bool *received)
{
uintptr_t element_size;
uint64_t ret;
if (channel == NULL)
__go_panic_msg ("receive from nil channel");
element_size = channel->element_type->__size;
__go_assert (element_size <= sizeof (uint64_t));
if (!__go_receive_acquire (channel, for_select))
{
if (received != NULL)
*received = 0;
return 0;
}
ret = channel->data[channel->next_fetch];
__go_receive_release (channel);
if (received != NULL)
*received = 1;
return ret;
}
void
__go_builtin_close (struct __go_channel *channel)
{
int i;
i = pthread_mutex_lock (&channel->lock);
__go_assert (i == 0);
while (channel->selected_for_send)
{
i = pthread_cond_wait (&channel->cond, &channel->lock);
__go_assert (i == 0);
}
if (channel->is_closed)
{
i = pthread_mutex_unlock (&channel->lock);
__go_assert (i == 0);
__go_panic_msg ("close of closed channel");
}
channel->is_closed = 1;
i = pthread_cond_broadcast (&channel->cond);
__go_assert (i == 0);
__go_unlock_and_notify_selects (channel);
}
void
__go_runtime_error (int i)
{
switch (i)
{
case SLICE_INDEX_OUT_OF_BOUNDS:
case ARRAY_INDEX_OUT_OF_BOUNDS:
case STRING_INDEX_OUT_OF_BOUNDS:
__go_panic_msg ("index out of range");
case SLICE_SLICE_OUT_OF_BOUNDS:
case ARRAY_SLICE_OUT_OF_BOUNDS:
case STRING_SLICE_OUT_OF_BOUNDS:
__go_panic_msg ("slice bounds out of range");
case NIL_DEREFERENCE:
__go_panic_msg ("nil pointer dereference");
case MAKE_SLICE_OUT_OF_BOUNDS:
__go_panic_msg ("make slice len or cap out of range");
case MAKE_MAP_OUT_OF_BOUNDS:
__go_panic_msg ("make map len out of range");
case MAKE_CHAN_OUT_OF_BOUNDS:
__go_panic_msg ("make chan len out of range");
default:
__go_panic_msg ("unknown runtime error");
}
}
void
__go_send_acquire (struct __go_channel *channel, _Bool for_select)
{
int i;
i = pthread_mutex_lock (&channel->lock);
__go_assert (i == 0);
while (1)
{
if (channel->is_closed)
{
if (for_select)
channel->selected_for_send = 0;
i = pthread_mutex_unlock (&channel->lock);
__go_assert (i == 0);
__go_panic_msg ("send on closed channel");
}
/* If somebody else has the channel locked for sending, we have
to wait. If FOR_SELECT is true, then we are the one with the
lock. */
if (!channel->selected_for_send || for_select)
{
if (channel->num_entries == 0)
{
/* This is a synchronous channel. If nobody else is
waiting to send, we grab the channel and tell the
caller to send the data. We will then wait for a
receiver. */
if (!channel->waiting_to_send)
{
__go_assert (channel->next_store == 0);
return;
}
}
else
{
/* If there is room on the channel, we are OK. */
if ((channel->next_store + 1) % channel->num_entries
!= channel->next_fetch)
return;
}
}
/* Wait for something to change, then loop around and try
again. */
i = pthread_cond_wait (&channel->cond, &channel->lock);
__go_assert (i == 0);
}
}
void
__go_send_small (struct __go_channel *channel, uint64_t val, _Bool for_select)
{
if (channel == NULL)
__go_panic_msg ("send to nil channel");
__go_assert (channel->element_size <= sizeof (uint64_t));
__go_send_acquire (channel, for_select);
channel->data[channel->next_store] = val;
__go_send_release (channel);
}
struct __go_string
__go_string_slice (struct __go_string s, int start, int end)
{
int len;
struct __go_string ret;
len = s.__length;
if (end == -1)
end = len;
if (start > len || end < start || end > len)
__go_panic_msg ("string index out of bounds");
ret.__data = s.__data + start;
ret.__length = end - start;
return ret;
}
void
__go_send_big (struct __go_channel* channel, const void *val, _Bool for_select)
{
uintptr_t element_size;
size_t alloc_size;
size_t offset;
if (channel == NULL)
__go_panic_msg ("send to nil channel");
element_size = channel->element_type->__size;
alloc_size = (element_size + sizeof (uint64_t) - 1) / sizeof (uint64_t);
__go_send_acquire (channel, for_select);
offset = channel->next_store * alloc_size;
__builtin_memcpy (&channel->data[offset], val, element_size);
__go_send_release (channel);
}
struct __go_map *
__go_new_map (const struct __go_map_descriptor *descriptor, uintptr_t entries)
{
struct __go_map *ret;
if ((uintptr_t) (int) entries != entries)
__go_panic_msg ("map size out of range");
if (entries == 0)
entries = 5;
else
entries = __go_map_next_prime (entries);
ret = (struct __go_map *) __go_alloc (sizeof (struct __go_map));
ret->__descriptor = descriptor;
ret->__element_count = 0;
ret->__bucket_count = entries;
ret->__buckets = (void **) __go_alloc (entries * sizeof (void *));
__builtin_memset (ret->__buckets, 0, entries * sizeof (void *));
return ret;
}
void
mapassign (struct __go_map_type *mt, uintptr_t m, uintptr_t key_i,
uintptr_t val_i, _Bool pres)
{
struct __go_map *map = (struct __go_map *) m;
const struct __go_type_descriptor *key_descriptor;
void *key;
__go_assert (mt->__common.__code == GO_MAP);
if (map == NULL)
__go_panic_msg ("assignment to entry in nil map");
key_descriptor = mt->__key_type;
if (__go_is_pointer_type (key_descriptor))
key = &key_i;
else
key = (void *) key_i;
if (!pres)
__go_map_delete (map, key);
else
{
void *p;
const struct __go_type_descriptor *val_descriptor;
void *pv;
p = __go_map_index (map, key, 1);
val_descriptor = mt->__val_type;
if (__go_is_pointer_type (val_descriptor))
pv = &val_i;
else
pv = (void *) val_i;
__builtin_memcpy (p, pv, val_descriptor->__size);
}
}
_Bool
__go_send_nonblocking_acquire (struct __go_channel *channel)
{
int i;
_Bool has_space;
i = pthread_mutex_lock (&channel->lock);
__go_assert (i == 0);
while (channel->selected_for_send)
{
i = pthread_cond_wait (&channel->cond, &channel->lock);
__go_assert (i == 0);
}
if (channel->is_closed)
{
i = pthread_mutex_unlock (&channel->lock);
__go_assert (i == 0);
__go_panic_msg ("send on closed channel");
}
if (channel->num_entries > 0)
has_space = ((channel->next_store + 1) % channel->num_entries
!= channel->next_fetch);
else
{
/* This is a synchronous channel. If somebody is current
sending, then we can't send. Otherwise, see if somebody is
waiting to receive, or see if we can synch with a select. */
if (channel->waiting_to_send)
{
/* Some other goroutine is currently sending on this
channel, which means that we can't. */
has_space = 0;
}
else if (channel->waiting_to_receive)
{
/* Some other goroutine is waiting to receive a value, so we
can send directly to them. */
has_space = 1;
}
else if (__go_synch_with_select (channel, 1))
{
/* We found a select waiting to receive data, so we can send
to that. */
__go_broadcast_to_select (channel);
has_space = 1;
}
else
{
/* Otherwise, we can't send, because nobody is waiting to
receive. */
has_space = 0;
}
if (has_space)
{
channel->waiting_to_send = 1;
__go_assert (channel->next_store == 0);
}
}
if (!has_space)
{
i = pthread_mutex_unlock (&channel->lock);
__go_assert (i == 0);
return 0;
}
return 1;
}
static void
sighandler (int sig)
{
const char *msg;
int i;
if (sig == SIGPROF)
{
/* FIXME. */
runtime_sigprof (0, 0, nil);
return;
}
/* FIXME: Should check siginfo for more information when
available. */
msg = NULL;
switch (sig)
{
#ifdef SIGBUS
case SIGBUS:
msg = "invalid memory address or nil pointer dereference";
break;
#endif
#ifdef SIGFPE
case SIGFPE:
msg = "integer divide by zero or floating point error";
break;
#endif
#ifdef SIGSEGV
case SIGSEGV:
msg = "invalid memory address or nil pointer dereference";
break;
#endif
default:
break;
}
if (msg != NULL)
{
sigset_t clear;
if (__sync_bool_compare_and_swap (&m->mallocing, 1, 1))
{
fprintf (stderr, "caught signal while mallocing: %s\n", msg);
__go_assert (0);
}
/* The signal handler blocked signals; unblock them. */
i = sigfillset (&clear);
__go_assert (i == 0);
i = sigprocmask (SIG_UNBLOCK, &clear, NULL);
__go_assert (i == 0);
__go_panic_msg (msg);
}
if (__go_sigsend (sig))
return;
for (i = 0; signals[i].sig != -1; ++i)
{
if (signals[i].sig == sig)
{
struct sigaction sa;
if (signals[i].ignore)
return;
memset (&sa, 0, sizeof sa);
sa.sa_handler = SIG_DFL;
i = sigemptyset (&sa.sa_mask);
__go_assert (i == 0);
if (sigaction (sig, &sa, NULL) != 0)
abort ();
raise (sig);
exit (2);
}
}
abort ();
}
