1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/runtime/javaCalls.hpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,195 @@
1.4 +/*
1.5 + * Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +// A JavaCallWrapper is constructed before each JavaCall and destructed after the call.
1.29 +// Its purpose is to allocate/deallocate a new handle block and to save/restore the last
1.30 +// Java fp/sp. A pointer to the JavaCallWrapper is stored on the stack.
1.31 +
1.32 +class JavaCallWrapper: StackObj {
1.33 + friend class VMStructs;
1.34 + private:
1.35 + JavaThread* _thread; // the thread to which this call belongs
1.36 + JNIHandleBlock* _handles; // the saved handle block
1.37 + methodOop _callee_method; // to be able to collect arguments if entry frame is top frame
1.38 + oop _receiver; // the receiver of the call (if a non-static call)
1.39 +
1.40 + JavaFrameAnchor _anchor; // last thread anchor state that we must restore
1.41 +
1.42 + JavaValue* _result; // result value
1.43 +
1.44 + public:
1.45 + // Construction/destruction
1.46 + JavaCallWrapper(methodHandle callee_method, Handle receiver, JavaValue* result, TRAPS);
1.47 + ~JavaCallWrapper();
1.48 +
1.49 + // Accessors
1.50 + JavaThread* thread() const { return _thread; }
1.51 + JNIHandleBlock* handles() const { return _handles; }
1.52 +
1.53 + JavaFrameAnchor* anchor(void) { return &_anchor; }
1.54 +
1.55 + JavaValue* result() const { return _result; }
1.56 + // GC support
1.57 + methodOop callee_method() { return _callee_method; }
1.58 + oop receiver() { return _receiver; }
1.59 + void oops_do(OopClosure* f);
1.60 +
1.61 +};
1.62 +
1.63 +
1.64 +// Encapsulates arguments to a JavaCall (faster, safer, and more convenient than using var-args)
1.65 +class JavaCallArguments : public StackObj {
1.66 + private:
1.67 + enum Constants {
1.68 + _default_size = 8 // Must be at least # of arguments in JavaCalls methods
1.69 + };
1.70 +
1.71 + intptr_t _value_buffer [_default_size + 1];
1.72 + intptr_t _parameter_buffer [_default_size*2 + 1];
1.73 + bool _is_oop_buffer[_default_size + 1];
1.74 +
1.75 + intptr_t* _value;
1.76 + intptr_t* _parameters;
1.77 + bool* _is_oop;
1.78 + int _size;
1.79 + int _max_size;
1.80 + bool _start_at_zero; // Support late setting of receiver
1.81 +
1.82 + void initialize() {
1.83 + // Starts at first element to support set_receiver.
1.84 + _value = &_value_buffer[1];
1.85 + _is_oop = &_is_oop_buffer[1];
1.86 +
1.87 + _parameters = &_parameter_buffer[0];
1.88 + _max_size = _default_size;
1.89 + _size = 0;
1.90 + _start_at_zero = false;
1.91 + }
1.92 +
1.93 + public:
1.94 + JavaCallArguments() { initialize(); }
1.95 +
1.96 + JavaCallArguments(Handle receiver) {
1.97 + initialize();
1.98 + push_oop(receiver);
1.99 + }
1.100 +
1.101 + JavaCallArguments(int max_size) {
1.102 + if (max_size > _default_size) {
1.103 + _value = NEW_RESOURCE_ARRAY(intptr_t, max_size + 1);
1.104 + _is_oop = NEW_RESOURCE_ARRAY(bool, max_size + 1);
1.105 + if (TaggedStackInterpreter) {
1.106 + _parameters = NEW_RESOURCE_ARRAY(intptr_t, max_size*2 + 1);
1.107 + }
1.108 + // Reserve room for potential receiver in value and is_oop
1.109 + _value++; _is_oop++;
1.110 + _max_size = max_size;
1.111 + _size = 0;
1.112 + _start_at_zero = false;
1.113 + } else {
1.114 + initialize();
1.115 + }
1.116 + }
1.117 +
1.118 + inline void push_oop(Handle h) { _is_oop[_size] = true;
1.119 + JNITypes::put_obj((oop)h.raw_value(), _value, _size); }
1.120 +
1.121 + inline void push_int(int i) { _is_oop[_size] = false;
1.122 + JNITypes::put_int(i, _value, _size); }
1.123 +
1.124 + inline void push_double(double d) { _is_oop[_size] = false; _is_oop[_size + 1] = false;
1.125 + JNITypes::put_double(d, _value, _size); }
1.126 +
1.127 + inline void push_long(jlong l) { _is_oop[_size] = false; _is_oop[_size + 1] = false;
1.128 + JNITypes::put_long(l, _value, _size); }
1.129 +
1.130 + inline void push_float(float f) { _is_oop[_size] = false;
1.131 + JNITypes::put_float(f, _value, _size); }
1.132 +
1.133 + // receiver
1.134 + Handle receiver() {
1.135 + assert(_size > 0, "must at least be one argument");
1.136 + assert(_is_oop[0], "first argument must be an oop");
1.137 + assert(_value[0] != 0, "receiver must be not-null");
1.138 + return Handle((oop*)_value[0], false);
1.139 + }
1.140 +
1.141 + void set_receiver(Handle h) {
1.142 + assert(_start_at_zero == false, "can only be called once");
1.143 + _start_at_zero = true;
1.144 + _is_oop--;
1.145 + _value--;
1.146 + _size++;
1.147 + _is_oop[0] = true;
1.148 + _value[0] = (intptr_t)h.raw_value();
1.149 + }
1.150 +
1.151 + // Converts all Handles to oops, and returns a reference to parameter vector
1.152 + intptr_t* parameters() ;
1.153 + int size_of_parameters() const { return _size; }
1.154 +
1.155 + // Verify that pushed arguments fits a given method
1.156 + void verify(methodHandle method, BasicType return_type, Thread *thread) PRODUCT_RETURN;
1.157 +};
1.158 +
1.159 +// All calls to Java have to go via JavaCalls. Sets up the stack frame
1.160 +// and makes sure that the last_Java_frame pointers are chained correctly.
1.161 +//
1.162 +
1.163 +class JavaCalls: AllStatic {
1.164 + static void call_helper(JavaValue* result, methodHandle* method, JavaCallArguments* args, TRAPS);
1.165 + public:
1.166 + // Optimized Constuctor call
1.167 + static void call_default_constructor(JavaThread* thread, methodHandle method, Handle receiver, TRAPS);
1.168 +
1.169 + // call_special
1.170 + // ------------
1.171 + // The receiver must be first oop in argument list
1.172 + static void call_special(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS);
1.173 +
1.174 + static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS); // No args
1.175 + static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS);
1.176 + static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, Handle arg2, TRAPS);
1.177 +
1.178 + // virtual call
1.179 + // ------------
1.180 +
1.181 + // The receiver must be first oop in argument list
1.182 + static void call_virtual(JavaValue* result, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS);
1.183 +
1.184 + static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, TRAPS); // No args
1.185 + static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS);
1.186 + static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, Handle arg1, Handle arg2, TRAPS);
1.187 +
1.188 + // Static call
1.189 + // -----------
1.190 + static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS);
1.191 +
1.192 + static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS);
1.193 + static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS);
1.194 + static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, Handle arg2, TRAPS);
1.195 +
1.196 + // Low-level interface
1.197 + static void call(JavaValue* result, methodHandle method, JavaCallArguments* args, TRAPS);
1.198 +};
