J. Duke | 8153779 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | // A JavaCallWrapper is constructed before each JavaCall and destructed after the call. |
| 26 | // Its purpose is to allocate/deallocate a new handle block and to save/restore the last |
| 27 | // Java fp/sp. A pointer to the JavaCallWrapper is stored on the stack. |
| 28 | |
| 29 | class JavaCallWrapper: StackObj { |
| 30 | friend class VMStructs; |
| 31 | private: |
| 32 | JavaThread* _thread; // the thread to which this call belongs |
| 33 | JNIHandleBlock* _handles; // the saved handle block |
| 34 | methodOop _callee_method; // to be able to collect arguments if entry frame is top frame |
| 35 | oop _receiver; // the receiver of the call (if a non-static call) |
| 36 | |
| 37 | JavaFrameAnchor _anchor; // last thread anchor state that we must restore |
| 38 | |
| 39 | JavaValue* _result; // result value |
| 40 | |
| 41 | public: |
| 42 | // Construction/destruction |
| 43 | JavaCallWrapper(methodHandle callee_method, Handle receiver, JavaValue* result, TRAPS); |
| 44 | ~JavaCallWrapper(); |
| 45 | |
| 46 | // Accessors |
| 47 | JavaThread* thread() const { return _thread; } |
| 48 | JNIHandleBlock* handles() const { return _handles; } |
| 49 | |
| 50 | JavaFrameAnchor* anchor(void) { return &_anchor; } |
| 51 | |
| 52 | JavaValue* result() const { return _result; } |
| 53 | // GC support |
| 54 | methodOop callee_method() { return _callee_method; } |
| 55 | oop receiver() { return _receiver; } |
| 56 | void oops_do(OopClosure* f); |
| 57 | |
| 58 | }; |
| 59 | |
| 60 | |
| 61 | // Encapsulates arguments to a JavaCall (faster, safer, and more convenient than using var-args) |
| 62 | class JavaCallArguments : public StackObj { |
| 63 | private: |
| 64 | enum Constants { |
| 65 | _default_size = 8 // Must be at least # of arguments in JavaCalls methods |
| 66 | }; |
| 67 | |
| 68 | intptr_t _value_buffer [_default_size + 1]; |
| 69 | intptr_t _parameter_buffer [_default_size*2 + 1]; |
| 70 | bool _is_oop_buffer[_default_size + 1]; |
| 71 | |
| 72 | intptr_t* _value; |
| 73 | intptr_t* _parameters; |
| 74 | bool* _is_oop; |
| 75 | int _size; |
| 76 | int _max_size; |
| 77 | bool _start_at_zero; // Support late setting of receiver |
| 78 | |
| 79 | void initialize() { |
| 80 | // Starts at first element to support set_receiver. |
| 81 | _value = &_value_buffer[1]; |
| 82 | _is_oop = &_is_oop_buffer[1]; |
| 83 | |
| 84 | _parameters = &_parameter_buffer[0]; |
| 85 | _max_size = _default_size; |
| 86 | _size = 0; |
| 87 | _start_at_zero = false; |
| 88 | } |
| 89 | |
| 90 | public: |
| 91 | JavaCallArguments() { initialize(); } |
| 92 | |
| 93 | JavaCallArguments(Handle receiver) { |
| 94 | initialize(); |
| 95 | push_oop(receiver); |
| 96 | } |
| 97 | |
| 98 | JavaCallArguments(int max_size) { |
| 99 | if (max_size > _default_size) { |
| 100 | _value = NEW_RESOURCE_ARRAY(intptr_t, max_size + 1); |
| 101 | _is_oop = NEW_RESOURCE_ARRAY(bool, max_size + 1); |
| 102 | if (TaggedStackInterpreter) { |
| 103 | _parameters = NEW_RESOURCE_ARRAY(intptr_t, max_size*2 + 1); |
| 104 | } |
| 105 | // Reserve room for potential receiver in value and is_oop |
| 106 | _value++; _is_oop++; |
| 107 | _max_size = max_size; |
| 108 | _size = 0; |
| 109 | _start_at_zero = false; |
| 110 | } else { |
| 111 | initialize(); |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | inline void push_oop(Handle h) { _is_oop[_size] = true; |
| 116 | JNITypes::put_obj((oop)h.raw_value(), _value, _size); } |
| 117 | |
| 118 | inline void push_int(int i) { _is_oop[_size] = false; |
| 119 | JNITypes::put_int(i, _value, _size); } |
| 120 | |
| 121 | inline void push_double(double d) { _is_oop[_size] = false; _is_oop[_size + 1] = false; |
| 122 | JNITypes::put_double(d, _value, _size); } |
| 123 | |
| 124 | inline void push_long(jlong l) { _is_oop[_size] = false; _is_oop[_size + 1] = false; |
| 125 | JNITypes::put_long(l, _value, _size); } |
| 126 | |
| 127 | inline void push_float(float f) { _is_oop[_size] = false; |
| 128 | JNITypes::put_float(f, _value, _size); } |
| 129 | |
| 130 | // receiver |
| 131 | Handle receiver() { |
| 132 | assert(_size > 0, "must at least be one argument"); |
| 133 | assert(_is_oop[0], "first argument must be an oop"); |
| 134 | assert(_value[0] != 0, "receiver must be not-null"); |
| 135 | return Handle((oop*)_value[0], false); |
| 136 | } |
| 137 | |
| 138 | void set_receiver(Handle h) { |
| 139 | assert(_start_at_zero == false, "can only be called once"); |
| 140 | _start_at_zero = true; |
| 141 | _is_oop--; |
| 142 | _value--; |
| 143 | _size++; |
| 144 | _is_oop[0] = true; |
| 145 | _value[0] = (intptr_t)h.raw_value(); |
| 146 | } |
| 147 | |
| 148 | // Converts all Handles to oops, and returns a reference to parameter vector |
| 149 | intptr_t* parameters() ; |
| 150 | int size_of_parameters() const { return _size; } |
| 151 | |
| 152 | // Verify that pushed arguments fits a given method |
| 153 | void verify(methodHandle method, BasicType return_type, Thread *thread) PRODUCT_RETURN; |
| 154 | }; |
| 155 | |
| 156 | // All calls to Java have to go via JavaCalls. Sets up the stack frame |
| 157 | // and makes sure that the last_Java_frame pointers are chained correctly. |
| 158 | // |
| 159 | |
| 160 | class JavaCalls: AllStatic { |
| 161 | static void call_helper(JavaValue* result, methodHandle* method, JavaCallArguments* args, TRAPS); |
| 162 | public: |
| 163 | // Optimized Constuctor call |
| 164 | static void call_default_constructor(JavaThread* thread, methodHandle method, Handle receiver, TRAPS); |
| 165 | |
| 166 | // call_special |
| 167 | // ------------ |
| 168 | // The receiver must be first oop in argument list |
| 169 | static void call_special(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS); |
| 170 | |
| 171 | static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS); // No args |
| 172 | static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS); |
| 173 | static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, Handle arg2, TRAPS); |
| 174 | |
| 175 | // virtual call |
| 176 | // ------------ |
| 177 | |
| 178 | // The receiver must be first oop in argument list |
| 179 | static void call_virtual(JavaValue* result, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS); |
| 180 | |
| 181 | static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, TRAPS); // No args |
| 182 | static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS); |
| 183 | static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, Handle arg1, Handle arg2, TRAPS); |
| 184 | |
| 185 | // Static call |
| 186 | // ----------- |
| 187 | static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS); |
| 188 | |
| 189 | static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS); |
| 190 | static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS); |
| 191 | static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, Handle arg2, TRAPS); |
| 192 | |
| 193 | // Low-level interface |
| 194 | static void call(JavaValue* result, methodHandle method, JavaCallArguments* args, TRAPS); |
| 195 | }; |