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  *
  23  */
  24 
  25 #include "incls/_precompiled.incl"
  26 #include "incls/_javaCalls.cpp.incl"
























  27 
  28 // -----------------------------------------------------
  29 // Implementation of JavaCallWrapper
  30 
  31 JavaCallWrapper::JavaCallWrapper(methodHandle callee_method, Handle receiver, JavaValue* result, TRAPS) {
  32   JavaThread* thread = (JavaThread *)THREAD;
  33   bool clear_pending_exception = true;
  34 
  35   guarantee(thread->is_Java_thread(), "crucial check - the VM thread cannot and must not escape to Java code");
  36   assert(!thread->owns_locks(), "must release all locks when leaving VM");
  37   guarantee(!thread->is_Compiler_thread(), "cannot make java calls from the compiler");
  38   _result   = result;
  39 
  40   // Allocate handle block for Java code. This must be done before we change thread_state to _thread_in_Java_or_stub,
  41   // since it can potentially block.
  42   JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
  43 
  44   // After this, we are official in JavaCode. This needs to be done before we change any of the thread local
  45   // info, since we cannot find oops before the new information is set up completely.
  46   ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_Java);

   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  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "classfile/systemDictionary.hpp"
  27 #include "classfile/vmSymbols.hpp"
  28 #include "code/nmethod.hpp"
  29 #include "compiler/compileBroker.hpp"
  30 #include "interpreter/interpreter.hpp"
  31 #include "interpreter/linkResolver.hpp"
  32 #include "memory/universe.inline.hpp"
  33 #include "oops/oop.inline.hpp"
  34 #include "prims/jniCheck.hpp"
  35 #include "runtime/compilationPolicy.hpp"
  36 #include "runtime/handles.inline.hpp"
  37 #include "runtime/interfaceSupport.hpp"
  38 #include "runtime/javaCalls.hpp"
  39 #include "runtime/mutexLocker.hpp"
  40 #include "runtime/signature.hpp"
  41 #include "runtime/stubRoutines.hpp"
  42 #ifdef TARGET_OS_FAMILY_linux
  43 # include "thread_linux.inline.hpp"
  44 #endif
  45 #ifdef TARGET_OS_FAMILY_solaris
  46 # include "thread_solaris.inline.hpp"
  47 #endif
  48 #ifdef TARGET_OS_FAMILY_windows
  49 # include "thread_windows.inline.hpp"
  50 #endif
  51 
  52 // -----------------------------------------------------
  53 // Implementation of JavaCallWrapper
  54 
  55 JavaCallWrapper::JavaCallWrapper(methodHandle callee_method, Handle receiver, JavaValue* result, TRAPS) {
  56   JavaThread* thread = (JavaThread *)THREAD;
  57   bool clear_pending_exception = true;
  58 
  59   guarantee(thread->is_Java_thread(), "crucial check - the VM thread cannot and must not escape to Java code");
  60   assert(!thread->owns_locks(), "must release all locks when leaving VM");
  61   guarantee(!thread->is_Compiler_thread(), "cannot make java calls from the compiler");
  62   _result   = result;
  63 
  64   // Allocate handle block for Java code. This must be done before we change thread_state to _thread_in_Java_or_stub,
  65   // since it can potentially block.
  66   JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
  67 
  68   // After this, we are official in JavaCode. This needs to be done before we change any of the thread local
  69   // info, since we cannot find oops before the new information is set up completely.
  70   ThreadStateTransition::transition(thread, _thread_in_vm, _thread_in_Java);