#define TLS_VECTOR_OFFSET_10_9 0xb0
#define TLS_VECTOR_OFFSET_10_11 0x100
+
+/* This is 2 slots less than the known low */
+#define TLS_PROBE_LOW_WATERMARK 0x40
+/* This is 28 slots above the know high, which is more than the known high-low*/
+#define TLS_PROBE_HIGH_WATERMARK 0x120
+
+
static int tls_vector_offset;
void *
kern_return_t
mono_mach_arch_get_thread_state (thread_port_t thread, thread_state_t state, mach_msg_type_number_t *count)
{
+#if defined(HOST_WATCHOS)
+ g_error ("thread_get_state() is not supported by this platform");
+#else
x86_thread_state32_t *arch_state = (x86_thread_state32_t *) state;
kern_return_t ret;
*count = x86_THREAD_STATE32_COUNT;
-
ret = thread_get_state (thread, x86_THREAD_STATE32, (thread_state_t) arch_state, count);
return ret;
+#endif
}
kern_return_t
mono_mach_arch_set_thread_state (thread_port_t thread, thread_state_t state, mach_msg_type_number_t count)
{
+#if defined(HOST_WATCHOS)
+ g_error ("thread_set_state() is not supported by this platform");
+#else
return thread_set_state (thread, x86_THREAD_STATE32, state, count);
+#endif
}
void *
*/
intptr_t *p = (intptr_t *) thread;
intptr_t **tsd = (intptr_t **) ((char*)p + tls_vector_offset);
+ g_assert (tls_vector_offset != -1);
return (void *) &tsd [key];
}
void
mono_mach_init (pthread_key_t key)
{
+ int i;
void *old_value = pthread_getspecific (key);
void *canary = (void*)0xDEADBEEFu;
if (mono_mach_arch_get_tls_value_from_thread (pthread_self (), key) == canary)
goto ok;
- g_error ("could not discover the mach TLS offset");
+ /*Fallback to scanning a large range of offsets*/
+ for (i = TLS_PROBE_LOW_WATERMARK; i <= TLS_PROBE_HIGH_WATERMARK; i += 4) {
+ tls_vector_offset = i;
+ if (mono_mach_arch_get_tls_value_from_thread (pthread_self (), key) == canary) {
+ g_warning ("Found new TLS offset at %d", i);
+ goto ok;
+ }
+ }
+
+ tls_vector_offset = -1;
+ g_warning ("could not discover the mach TLS offset");
ok:
pthread_setspecific (key, old_value);
}