diff -r 000000000000 -r a61af66fc99e src/share/vm/runtime/javaCalls.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/runtime/javaCalls.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,195 @@ +/* + * Copyright 1997-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +// 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 + methodOop _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 + methodOop callee_method() { return _callee_method; } + oop receiver() { return _receiver; } + void oops_do(OopClosure* f); + +}; + + +// 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]; + intptr_t _parameter_buffer [_default_size*2 + 1]; + bool _is_oop_buffer[_default_size + 1]; + + intptr_t* _value; + intptr_t* _parameters; + 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]; + + _parameters = &_parameter_buffer[0]; + _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); + if (TaggedStackInterpreter) { + _parameters = NEW_RESOURCE_ARRAY(intptr_t, max_size*2 + 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) PRODUCT_RETURN; +}; + +// 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, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS); + + static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS); // No args + static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS); + static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle 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, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS); + + static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, TRAPS); // No args + static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS); + static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, Handle arg1, Handle arg2, TRAPS); + + // Static call + // ----------- + static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS); + + static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS); + static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS); + static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, Handle arg2, TRAPS); + + // Low-level interface + static void call(JavaValue* result, methodHandle method, JavaCallArguments* args, TRAPS); +};