259
260 _external_suspend = 0x20000000U, // thread is asked to self suspend
261 _ext_suspended = 0x40000000U, // thread has self-suspended
262 _deopt_suspend = 0x10000000U, // thread needs to self suspend for deopt
263
264 _has_async_exception = 0x00000001U, // there is a pending async exception
265 _critical_native_unlock = 0x00000002U, // Must call back to unlock JNI critical lock
266
267 _trace_flag = 0x00000004U // call tracing backend
268 };
269
270 // various suspension related flags - atomically updated
271 // overloaded for async exception checking in check_special_condition_for_native_trans.
272 volatile uint32_t _suspend_flags;
273
274 private:
275 int _num_nested_signal;
276
277 DEBUG_ONLY(bool _suspendible_thread;)
278
279 public:
280 void enter_signal_handler() { _num_nested_signal++; }
281 void leave_signal_handler() { _num_nested_signal--; }
282 bool is_inside_signal_handler() const { return _num_nested_signal > 0; }
283
284 #ifdef ASSERT
285 void set_suspendible_thread() {
286 _suspendible_thread = true;
287 }
288
289 void clear_suspendible_thread() {
290 _suspendible_thread = false;
291 }
292
293 bool is_suspendible_thread() { return _suspendible_thread; }
294 #endif
295
296 private:
297 // Active_handles points to a block of handles
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259
260 _external_suspend = 0x20000000U, // thread is asked to self suspend
261 _ext_suspended = 0x40000000U, // thread has self-suspended
262 _deopt_suspend = 0x10000000U, // thread needs to self suspend for deopt
263
264 _has_async_exception = 0x00000001U, // there is a pending async exception
265 _critical_native_unlock = 0x00000002U, // Must call back to unlock JNI critical lock
266
267 _trace_flag = 0x00000004U // call tracing backend
268 };
269
270 // various suspension related flags - atomically updated
271 // overloaded for async exception checking in check_special_condition_for_native_trans.
272 volatile uint32_t _suspend_flags;
273
274 private:
275 int _num_nested_signal;
276
277 DEBUG_ONLY(bool _suspendible_thread;)
278
279 bool _in_nmethod_entry_barrier;
280
281 public:
282 bool in_nmethod_entry_barrier() const { return _in_nmethod_entry_barrier; }
283 void set_is_in_nmethod_entry_barrier(bool value) { _in_nmethod_entry_barrier = value; }
284
285 public:
286 void enter_signal_handler() { _num_nested_signal++; }
287 void leave_signal_handler() { _num_nested_signal--; }
288 bool is_inside_signal_handler() const { return _num_nested_signal > 0; }
289
290 #ifdef ASSERT
291 void set_suspendible_thread() {
292 _suspendible_thread = true;
293 }
294
295 void clear_suspendible_thread() {
296 _suspendible_thread = false;
297 }
298
299 bool is_suspendible_thread() { return _suspendible_thread; }
300 #endif
301
302 private:
303 // Active_handles points to a block of handles
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