duke@435: /* duke@435: * Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved. duke@435: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. duke@435: * duke@435: * This code is free software; you can redistribute it and/or modify it duke@435: * under the terms of the GNU General Public License version 2 only, as duke@435: * published by the Free Software Foundation. duke@435: * duke@435: * This code is distributed in the hope that it will be useful, but WITHOUT duke@435: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or duke@435: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License duke@435: * version 2 for more details (a copy is included in the LICENSE file that duke@435: * accompanied this code). duke@435: * duke@435: * You should have received a copy of the GNU General Public License version duke@435: * 2 along with this work; if not, write to the Free Software Foundation, duke@435: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. duke@435: * duke@435: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, duke@435: * CA 95054 USA or visit www.sun.com if you need additional information or duke@435: * have any questions. duke@435: * duke@435: */ duke@435: duke@435: // A JavaCallWrapper is constructed before each JavaCall and destructed after the call. duke@435: // Its purpose is to allocate/deallocate a new handle block and to save/restore the last duke@435: // Java fp/sp. A pointer to the JavaCallWrapper is stored on the stack. duke@435: duke@435: class JavaCallWrapper: StackObj { duke@435: friend class VMStructs; duke@435: private: duke@435: JavaThread* _thread; // the thread to which this call belongs duke@435: JNIHandleBlock* _handles; // the saved handle block duke@435: methodOop _callee_method; // to be able to collect arguments if entry frame is top frame duke@435: oop _receiver; // the receiver of the call (if a non-static call) duke@435: duke@435: JavaFrameAnchor _anchor; // last thread anchor state that we must restore duke@435: duke@435: JavaValue* _result; // result value duke@435: duke@435: public: duke@435: // Construction/destruction duke@435: JavaCallWrapper(methodHandle callee_method, Handle receiver, JavaValue* result, TRAPS); duke@435: ~JavaCallWrapper(); duke@435: duke@435: // Accessors duke@435: JavaThread* thread() const { return _thread; } duke@435: JNIHandleBlock* handles() const { return _handles; } duke@435: duke@435: JavaFrameAnchor* anchor(void) { return &_anchor; } duke@435: duke@435: JavaValue* result() const { return _result; } duke@435: // GC support duke@435: methodOop callee_method() { return _callee_method; } duke@435: oop receiver() { return _receiver; } duke@435: void oops_do(OopClosure* f); duke@435: duke@435: }; duke@435: duke@435: duke@435: // Encapsulates arguments to a JavaCall (faster, safer, and more convenient than using var-args) duke@435: class JavaCallArguments : public StackObj { duke@435: private: duke@435: enum Constants { duke@435: _default_size = 8 // Must be at least # of arguments in JavaCalls methods duke@435: }; duke@435: duke@435: intptr_t _value_buffer [_default_size + 1]; duke@435: intptr_t _parameter_buffer [_default_size*2 + 1]; duke@435: bool _is_oop_buffer[_default_size + 1]; duke@435: duke@435: intptr_t* _value; duke@435: intptr_t* _parameters; duke@435: bool* _is_oop; duke@435: int _size; duke@435: int _max_size; duke@435: bool _start_at_zero; // Support late setting of receiver duke@435: duke@435: void initialize() { duke@435: // Starts at first element to support set_receiver. duke@435: _value = &_value_buffer[1]; duke@435: _is_oop = &_is_oop_buffer[1]; duke@435: duke@435: _parameters = &_parameter_buffer[0]; duke@435: _max_size = _default_size; duke@435: _size = 0; duke@435: _start_at_zero = false; duke@435: } duke@435: duke@435: public: duke@435: JavaCallArguments() { initialize(); } duke@435: duke@435: JavaCallArguments(Handle receiver) { duke@435: initialize(); duke@435: push_oop(receiver); duke@435: } duke@435: duke@435: JavaCallArguments(int max_size) { duke@435: if (max_size > _default_size) { duke@435: _value = NEW_RESOURCE_ARRAY(intptr_t, max_size + 1); duke@435: _is_oop = NEW_RESOURCE_ARRAY(bool, max_size + 1); duke@435: if (TaggedStackInterpreter) { duke@435: _parameters = NEW_RESOURCE_ARRAY(intptr_t, max_size*2 + 1); duke@435: } duke@435: // Reserve room for potential receiver in value and is_oop duke@435: _value++; _is_oop++; duke@435: _max_size = max_size; duke@435: _size = 0; duke@435: _start_at_zero = false; duke@435: } else { duke@435: initialize(); duke@435: } duke@435: } duke@435: duke@435: inline void push_oop(Handle h) { _is_oop[_size] = true; duke@435: JNITypes::put_obj((oop)h.raw_value(), _value, _size); } duke@435: duke@435: inline void push_int(int i) { _is_oop[_size] = false; duke@435: JNITypes::put_int(i, _value, _size); } duke@435: duke@435: inline void push_double(double d) { _is_oop[_size] = false; _is_oop[_size + 1] = false; duke@435: JNITypes::put_double(d, _value, _size); } duke@435: duke@435: inline void push_long(jlong l) { _is_oop[_size] = false; _is_oop[_size + 1] = false; duke@435: JNITypes::put_long(l, _value, _size); } duke@435: duke@435: inline void push_float(float f) { _is_oop[_size] = false; duke@435: JNITypes::put_float(f, _value, _size); } duke@435: duke@435: // receiver duke@435: Handle receiver() { duke@435: assert(_size > 0, "must at least be one argument"); duke@435: assert(_is_oop[0], "first argument must be an oop"); duke@435: assert(_value[0] != 0, "receiver must be not-null"); duke@435: return Handle((oop*)_value[0], false); duke@435: } duke@435: duke@435: void set_receiver(Handle h) { duke@435: assert(_start_at_zero == false, "can only be called once"); duke@435: _start_at_zero = true; duke@435: _is_oop--; duke@435: _value--; duke@435: _size++; duke@435: _is_oop[0] = true; duke@435: _value[0] = (intptr_t)h.raw_value(); duke@435: } duke@435: duke@435: // Converts all Handles to oops, and returns a reference to parameter vector duke@435: intptr_t* parameters() ; duke@435: int size_of_parameters() const { return _size; } duke@435: duke@435: // Verify that pushed arguments fits a given method duke@435: void verify(methodHandle method, BasicType return_type, Thread *thread) PRODUCT_RETURN; duke@435: }; duke@435: duke@435: // All calls to Java have to go via JavaCalls. Sets up the stack frame duke@435: // and makes sure that the last_Java_frame pointers are chained correctly. duke@435: // duke@435: duke@435: class JavaCalls: AllStatic { duke@435: static void call_helper(JavaValue* result, methodHandle* method, JavaCallArguments* args, TRAPS); duke@435: public: duke@435: // Optimized Constuctor call duke@435: static void call_default_constructor(JavaThread* thread, methodHandle method, Handle receiver, TRAPS); duke@435: duke@435: // call_special duke@435: // ------------ duke@435: // The receiver must be first oop in argument list duke@435: static void call_special(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS); duke@435: duke@435: static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS); // No args duke@435: static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS); duke@435: static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, Handle arg2, TRAPS); duke@435: duke@435: // virtual call duke@435: // ------------ duke@435: duke@435: // The receiver must be first oop in argument list duke@435: static void call_virtual(JavaValue* result, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS); duke@435: duke@435: static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, TRAPS); // No args duke@435: static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS); duke@435: static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, Handle arg1, Handle arg2, TRAPS); duke@435: duke@435: // Static call duke@435: // ----------- duke@435: static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS); duke@435: duke@435: static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS); duke@435: static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS); duke@435: static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, Handle arg2, TRAPS); duke@435: duke@435: // Low-level interface duke@435: static void call(JavaValue* result, methodHandle method, JavaCallArguments* args, TRAPS); duke@435: };