src/share/vm/runtime/javaCalls.hpp - platform/external/jetbrains/jdk8u_hotspot - Git at Google

 /*
  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */

 #ifndef SHARE_VM_RUNTIME_JAVACALLS_HPP
 #define SHARE_VM_RUNTIME_JAVACALLS_HPP

 #include "memory/allocation.hpp"
 #include "oops/method.hpp"
 #include "runtime/handles.hpp"
 #include "runtime/javaFrameAnchor.hpp"
 #include "runtime/thread.inline.hpp"
 #include "runtime/vmThread.hpp"
 #ifdef TARGET_ARCH_x86
 # include "jniTypes_x86.hpp"
 #endif
 #ifdef TARGET_ARCH_sparc
 # include "jniTypes_sparc.hpp"
 #endif
 #ifdef TARGET_ARCH_zero
 # include "jniTypes_zero.hpp"
 #endif
 #ifdef TARGET_ARCH_arm
 # include "jniTypes_arm.hpp"
 #endif
 #ifdef TARGET_ARCH_ppc
 # include "jniTypes_ppc.hpp"
 #endif

 // A JavaCallWrapper is constructed before each JavaCall and destructed after the call.
 // Its purpose is to allocate/deallocate a new handle block and to save/restore the last
 // Java fp/sp. A pointer to the JavaCallWrapper is stored on the stack.

 class JavaCallWrapper: StackObj {
   friend class VMStructs;
  private:
   JavaThread*      _thread;                 // the thread to which this call belongs
   JNIHandleBlock*  _handles;                // the saved handle block
   Method*          _callee_method;          // to be able to collect arguments if entry frame is top frame
   oop              _receiver;               // the receiver of the call (if a non-static call)

   JavaFrameAnchor  _anchor;                 // last thread anchor state that we must restore

   JavaValue*       _result;                 // result value

  public:
   // Construction/destruction
    JavaCallWrapper(methodHandle callee_method, Handle receiver, JavaValue* result, TRAPS);
   ~JavaCallWrapper();

   // Accessors
   JavaThread*      thread() const           { return _thread; }
   JNIHandleBlock*  handles() const          { return _handles; }

   JavaFrameAnchor* anchor(void)             { return &_anchor; }

   JavaValue*       result() const           { return _result; }
   // GC support
   Method*          callee_method()          { return _callee_method; }
   oop              receiver()               { return _receiver; }
   void             oops_do(OopClosure* f);

   bool             is_first_frame() const   { return _anchor.last_Java_sp() == NULL; }

 };


 // Encapsulates arguments to a JavaCall (faster, safer, and more convenient than using var-args)
 class JavaCallArguments : public StackObj {
  private:
   enum Constants {
    _default_size = 8    // Must be at least # of arguments in JavaCalls methods
   };

   intptr_t    _value_buffer [_default_size + 1];
   bool        _is_oop_buffer[_default_size + 1];

   intptr_t*   _value;
   bool*       _is_oop;
   int         _size;
   int         _max_size;
   bool        _start_at_zero;      // Support late setting of receiver

   void initialize() {
     // Starts at first element to support set_receiver.
     _value    = &_value_buffer[1];
     _is_oop   = &_is_oop_buffer[1];

     _max_size = _default_size;
     _size = 0;
     _start_at_zero = false;
   }

  public:
   JavaCallArguments() { initialize(); }

   JavaCallArguments(Handle receiver) {
     initialize();
     push_oop(receiver);
   }

   JavaCallArguments(int max_size) {
     if (max_size > _default_size) {
       _value  = NEW_RESOURCE_ARRAY(intptr_t, max_size + 1);
       _is_oop = NEW_RESOURCE_ARRAY(bool, max_size + 1);

       // Reserve room for potential receiver in value and is_oop
       _value++; _is_oop++;

       _max_size = max_size;
       _size = 0;
       _start_at_zero = false;
     } else {
       initialize();
     }
   }

   inline void push_oop(Handle h)    { _is_oop[_size] = true;
                                JNITypes::put_obj((oop)h.raw_value(), _value, _size); }

   inline void push_int(int i)       { _is_oop[_size] = false;
                                JNITypes::put_int(i, _value, _size); }

   inline void push_double(double d) { _is_oop[_size] = false; _is_oop[_size + 1] = false;
                                JNITypes::put_double(d, _value, _size); }

   inline void push_long(jlong l)    { _is_oop[_size] = false; _is_oop[_size + 1] = false;
                                JNITypes::put_long(l, _value, _size); }

   inline void push_float(float f)   { _is_oop[_size] = false;
                                JNITypes::put_float(f, _value, _size); }

   // receiver
   Handle receiver() {
     assert(_size > 0, "must at least be one argument");
     assert(_is_oop[0], "first argument must be an oop");
     assert(_value[0] != 0, "receiver must be not-null");
     return Handle((oop*)_value[0], false);
   }

   void set_receiver(Handle h) {
     assert(_start_at_zero == false, "can only be called once");
     _start_at_zero = true;
     _is_oop--;
     _value--;
     _size++;
     _is_oop[0] = true;
     _value[0] = (intptr_t)h.raw_value();
   }

   // Converts all Handles to oops, and returns a reference to parameter vector
   intptr_t* parameters() ;
   int   size_of_parameters() const { return _size; }

   // Verify that pushed arguments fits a given method
   void verify(methodHandle method, BasicType return_type, Thread *thread);
 };

 // All calls to Java have to go via JavaCalls. Sets up the stack frame
 // and makes sure that the last_Java_frame pointers are chained correctly.
 //

 class JavaCalls: AllStatic {
   static void call_helper(JavaValue* result, methodHandle* method, JavaCallArguments* args, TRAPS);
  public:
   // Optimized Constuctor call
   static void call_default_constructor(JavaThread* thread, methodHandle method, Handle receiver, TRAPS);

   // call_special
   // ------------
   // The receiver must be first oop in argument list
   static void call_special(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS);

   static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS); // No args
   static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS);
   static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS);

   // virtual call
   // ------------

   // The receiver must be first oop in argument list
   static void call_virtual(JavaValue* result, KlassHandle spec_klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS);

   static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, Symbol* name, Symbol* signature, TRAPS); // No args
   static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS);
   static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS);

   // Static call
   // -----------
   static void call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS);

   static void call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS);
   static void call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS);
   static void call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS);

   // Low-level interface
   static void call(JavaValue* result, methodHandle method, JavaCallArguments* args, TRAPS);
 };

 #endif // SHARE_VM_RUNTIME_JAVACALLS_HPP
	/*
	* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*
	*/

	#ifndef SHARE_VM_RUNTIME_JAVACALLS_HPP
	#define SHARE_VM_RUNTIME_JAVACALLS_HPP

	#include "memory/allocation.hpp"
	#include "oops/method.hpp"
	#include "runtime/handles.hpp"
	#include "runtime/javaFrameAnchor.hpp"
	#include "runtime/thread.inline.hpp"
	#include "runtime/vmThread.hpp"
	#ifdef TARGET_ARCH_x86
	# include "jniTypes_x86.hpp"
	#endif
	#ifdef TARGET_ARCH_sparc
	# include "jniTypes_sparc.hpp"
	#endif
	#ifdef TARGET_ARCH_zero
	# include "jniTypes_zero.hpp"
	#endif
	#ifdef TARGET_ARCH_arm
	# include "jniTypes_arm.hpp"
	#endif
	#ifdef TARGET_ARCH_ppc
	# include "jniTypes_ppc.hpp"
	#endif

	// A JavaCallWrapper is constructed before each JavaCall and destructed after the call.
	// Its purpose is to allocate/deallocate a new handle block and to save/restore the last
	// Java fp/sp. A pointer to the JavaCallWrapper is stored on the stack.

	class JavaCallWrapper: StackObj {
	friend class VMStructs;
	private:
	JavaThread* _thread; // the thread to which this call belongs
	JNIHandleBlock* _handles; // the saved handle block
	Method* _callee_method; // to be able to collect arguments if entry frame is top frame
	oop _receiver; // the receiver of the call (if a non-static call)

	JavaFrameAnchor _anchor; // last thread anchor state that we must restore

	JavaValue* _result; // result value

	public:
	// Construction/destruction
	JavaCallWrapper(methodHandle callee_method, Handle receiver, JavaValue* result, TRAPS);
	~JavaCallWrapper();

	// Accessors
	JavaThread* thread() const { return _thread; }
	JNIHandleBlock* handles() const { return _handles; }

	JavaFrameAnchor* anchor(void) { return &_anchor; }

	JavaValue* result() const { return _result; }
	// GC support
	Method* callee_method() { return _callee_method; }
	oop receiver() { return _receiver; }
	void oops_do(OopClosure* f);

	bool is_first_frame() const { return _anchor.last_Java_sp() == NULL; }

	};


	// Encapsulates arguments to a JavaCall (faster, safer, and more convenient than using var-args)
	class JavaCallArguments : public StackObj {
	private:
	enum Constants {
	_default_size = 8 // Must be at least # of arguments in JavaCalls methods
	};

	intptr_t _value_buffer [_default_size + 1];
	bool _is_oop_buffer[_default_size + 1];

	intptr_t* _value;
	bool* _is_oop;
	int _size;
	int _max_size;
	bool _start_at_zero; // Support late setting of receiver

	void initialize() {
	// Starts at first element to support set_receiver.
	_value = &_value_buffer[1];
	_is_oop = &_is_oop_buffer[1];

	_max_size = _default_size;
	_size = 0;
	_start_at_zero = false;
	}

	public:
	JavaCallArguments() { initialize(); }

	JavaCallArguments(Handle receiver) {
	initialize();
	push_oop(receiver);
	}

	JavaCallArguments(int max_size) {
	if (max_size > _default_size) {
	_value = NEW_RESOURCE_ARRAY(intptr_t, max_size + 1);
	_is_oop = NEW_RESOURCE_ARRAY(bool, max_size + 1);

	// Reserve room for potential receiver in value and is_oop
	_value++; _is_oop++;

	_max_size = max_size;
	_size = 0;
	_start_at_zero = false;
	} else {
	initialize();
	}
	}

	inline void push_oop(Handle h) { _is_oop[_size] = true;
	JNITypes::put_obj((oop)h.raw_value(), _value, _size); }

	inline void push_int(int i) { _is_oop[_size] = false;
	JNITypes::put_int(i, _value, _size); }

	inline void push_double(double d) { _is_oop[_size] = false; _is_oop[_size + 1] = false;
	JNITypes::put_double(d, _value, _size); }

	inline void push_long(jlong l) { _is_oop[_size] = false; _is_oop[_size + 1] = false;
	JNITypes::put_long(l, _value, _size); }

	inline void push_float(float f) { _is_oop[_size] = false;
	JNITypes::put_float(f, _value, _size); }

	// receiver
	Handle receiver() {
	assert(_size > 0, "must at least be one argument");
	assert(_is_oop[0], "first argument must be an oop");
	assert(_value[0] != 0, "receiver must be not-null");
	return Handle((oop*)_value[0], false);
	}

	void set_receiver(Handle h) {
	assert(_start_at_zero == false, "can only be called once");
	_start_at_zero = true;
	_is_oop--;
	_value--;
	_size++;
	_is_oop[0] = true;
	_value[0] = (intptr_t)h.raw_value();
	}

	// Converts all Handles to oops, and returns a reference to parameter vector
	intptr_t* parameters() ;
	int size_of_parameters() const { return _size; }

	// Verify that pushed arguments fits a given method
	void verify(methodHandle method, BasicType return_type, Thread *thread);
	};

	// All calls to Java have to go via JavaCalls. Sets up the stack frame
	// and makes sure that the last_Java_frame pointers are chained correctly.
	//

	class JavaCalls: AllStatic {
	static void call_helper(JavaValue* result, methodHandle* method, JavaCallArguments* args, TRAPS);
	public:
	// Optimized Constuctor call
	static void call_default_constructor(JavaThread* thread, methodHandle method, Handle receiver, TRAPS);

	// call_special
	// ------------
	// The receiver must be first oop in argument list
	static void call_special(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS);

	static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS); // No args
	static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS);
	static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS);

	// virtual call
	// ------------

	// The receiver must be first oop in argument list
	static void call_virtual(JavaValue* result, KlassHandle spec_klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS);

	static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, Symbol* name, Symbol* signature, TRAPS); // No args
	static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS);
	static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS);

	// Static call
	// -----------
	static void call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS);

	static void call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS);
	static void call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS);
	static void call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS);

	// Low-level interface
	static void call(JavaValue* result, methodHandle method, JavaCallArguments* args, TRAPS);
	};

	#endif // SHARE_VM_RUNTIME_JAVACALLS_HPP