189 protected:
190 enum SuspendFlags {
191 // NOTE: avoid using the sign-bit as cc generates different test code
192 // when the sign-bit is used, and sometimes incorrectly - see CR 6398077
193
194 _external_suspend = 0x20000000U, // thread is asked to self suspend
195 _ext_suspended = 0x40000000U, // thread has self-suspended
196 _deopt_suspend = 0x10000000U, // thread needs to self suspend for deopt
197
198 _has_async_exception = 0x00000001U, // there is a pending async exception
199 _critical_native_unlock = 0x00000002U // Must call back to unlock JNI critical lock
200 };
201
202 // various suspension related flags - atomically updated
203 // overloaded for async exception checking in check_special_condition_for_native_trans.
204 volatile uint32_t _suspend_flags;
205
206 private:
207 int _num_nested_signal;
208
209 public:
210 void enter_signal_handler() { _num_nested_signal++; }
211 void leave_signal_handler() { _num_nested_signal--; }
212 bool is_inside_signal_handler() const { return _num_nested_signal > 0; }
213
214 private:
215 // Active_handles points to a block of handles
216 JNIHandleBlock* _active_handles;
217
218 // One-element thread local free list
219 JNIHandleBlock* _free_handle_block;
220
221 // Point to the last handle mark
222 HandleMark* _last_handle_mark;
223
224 // The parity of the last strong_roots iteration in which this thread was
225 // claimed as a task.
226 jint _oops_do_parity;
227
228 public:
229 void set_last_handle_mark(HandleMark* mark) { _last_handle_mark = mark; }
230 HandleMark* last_handle_mark() const { return _last_handle_mark; }
231 private:
232
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189 protected:
190 enum SuspendFlags {
191 // NOTE: avoid using the sign-bit as cc generates different test code
192 // when the sign-bit is used, and sometimes incorrectly - see CR 6398077
193
194 _external_suspend = 0x20000000U, // thread is asked to self suspend
195 _ext_suspended = 0x40000000U, // thread has self-suspended
196 _deopt_suspend = 0x10000000U, // thread needs to self suspend for deopt
197
198 _has_async_exception = 0x00000001U, // there is a pending async exception
199 _critical_native_unlock = 0x00000002U // Must call back to unlock JNI critical lock
200 };
201
202 // various suspension related flags - atomically updated
203 // overloaded for async exception checking in check_special_condition_for_native_trans.
204 volatile uint32_t _suspend_flags;
205
206 private:
207 int _num_nested_signal;
208
209 DEBUG_ONLY(bool _suspendible_thread;)
210
211 public:
212 void enter_signal_handler() { _num_nested_signal++; }
213 void leave_signal_handler() { _num_nested_signal--; }
214 bool is_inside_signal_handler() const { return _num_nested_signal > 0; }
215
216 #ifdef ASSERT
217 void set_suspendible_thread() {
218 _suspendible_thread = true;
219 }
220
221 void clear_suspendible_thread() {
222 _suspendible_thread = false;
223 }
224
225 bool is_suspendible_thread() { return _suspendible_thread; }
226 #endif
227
228 private:
229 // Active_handles points to a block of handles
230 JNIHandleBlock* _active_handles;
231
232 // One-element thread local free list
233 JNIHandleBlock* _free_handle_block;
234
235 // Point to the last handle mark
236 HandleMark* _last_handle_mark;
237
238 // The parity of the last strong_roots iteration in which this thread was
239 // claimed as a task.
240 jint _oops_do_parity;
241
242 public:
243 void set_last_handle_mark(HandleMark* mark) { _last_handle_mark = mark; }
244 HandleMark* last_handle_mark() const { return _last_handle_mark; }
245 private:
246
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