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src/hotspot/share/runtime/thread.hpp

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   1 /*
   2  * Copyright (c) 1997, 2020, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *


1301   void set_terminated(TerminatedTypes t);
1302   // special for Threads::remove() which is static:
1303   void set_terminated_value();
1304   void block_if_vm_exited();
1305 
1306   bool doing_unsafe_access()                     { return _doing_unsafe_access; }
1307   void set_doing_unsafe_access(bool val)         { _doing_unsafe_access = val; }
1308 
1309   bool do_not_unlock_if_synchronized()             { return _do_not_unlock_if_synchronized; }
1310   void set_do_not_unlock_if_synchronized(bool val) { _do_not_unlock_if_synchronized = val; }
1311 
1312   inline void set_polling_page_release(void* poll_value);
1313   inline void set_polling_page(void* poll_value);
1314   inline volatile void* get_polling_page();
1315 
1316  private:
1317   // Support for thread handshake operations
1318   HandshakeState _handshake;
1319  public:
1320   void set_handshake_operation(HandshakeOperation* op) {
1321     _handshake.set_operation(op);
1322   }
1323 
1324   bool has_handshake() const {
1325     return _handshake.has_operation();
1326   }
1327 
1328   void handshake_process_by_self() {
1329     _handshake.process_by_self();
1330   }
1331 
1332   bool handshake_try_process(HandshakeOperation* op) {
1333     return _handshake.try_process(op);
1334   }
1335 
1336 #ifdef ASSERT
1337   Thread* get_active_handshaker() const {
1338     return _handshake.get_active_handshaker();
1339   }
1340 #endif
1341 
1342   // Suspend/resume support for JavaThread
1343  private:
1344   inline void set_ext_suspended();
1345   inline void clear_ext_suspended();
1346 
1347  public:
1348   void java_suspend(); // higher-level suspension logic called by the public APIs
1349   void java_resume();  // higher-level resume logic called by the public APIs
1350   int  java_suspend_self(); // low-level self-suspension mechanics
1351 
1352  private:
1353   // mid-level wrapper around java_suspend_self to set up correct state and
1354   // check for a pending safepoint at the end
1355   void java_suspend_self_with_safepoint_check();
1356 
1357  public:
1358   void check_and_wait_while_suspended() {


   1 /*
   2  * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *


1301   void set_terminated(TerminatedTypes t);
1302   // special for Threads::remove() which is static:
1303   void set_terminated_value();
1304   void block_if_vm_exited();
1305 
1306   bool doing_unsafe_access()                     { return _doing_unsafe_access; }
1307   void set_doing_unsafe_access(bool val)         { _doing_unsafe_access = val; }
1308 
1309   bool do_not_unlock_if_synchronized()             { return _do_not_unlock_if_synchronized; }
1310   void set_do_not_unlock_if_synchronized(bool val) { _do_not_unlock_if_synchronized = val; }
1311 
1312   inline void set_polling_page_release(void* poll_value);
1313   inline void set_polling_page(void* poll_value);
1314   inline volatile void* get_polling_page();
1315 
1316  private:
1317   // Support for thread handshake operations
1318   HandshakeState _handshake;
1319  public:
1320   void set_handshake_operation(HandshakeOperation* op) {
1321     _handshake.set_operation(this, op);
1322   }
1323 
1324   bool has_handshake() const {
1325     return _handshake.has_operation();
1326   }
1327 
1328   void handshake_process_by_self() {
1329     _handshake.process_by_self(this);
1330   }
1331 
1332   bool handshake_try_process_by_vmThread() {
1333     return _handshake.try_process_by_vmThread(this);
1334   }
1335 
1336 #ifdef ASSERT
1337   bool is_vmthread_processing_handshake() const {
1338     return _handshake.is_vmthread_processing_handshake();
1339   }
1340 #endif
1341 
1342   // Suspend/resume support for JavaThread
1343  private:
1344   inline void set_ext_suspended();
1345   inline void clear_ext_suspended();
1346 
1347  public:
1348   void java_suspend(); // higher-level suspension logic called by the public APIs
1349   void java_resume();  // higher-level resume logic called by the public APIs
1350   int  java_suspend_self(); // low-level self-suspension mechanics
1351 
1352  private:
1353   // mid-level wrapper around java_suspend_self to set up correct state and
1354   // check for a pending safepoint at the end
1355   void java_suspend_self_with_safepoint_check();
1356 
1357  public:
1358   void check_and_wait_while_suspended() {


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