86 bool is_first_frame() const { return _anchor.last_Java_sp() == NULL; } 87 88 }; 89 90 91 // Encapsulates arguments to a JavaCall (faster, safer, and more convenient than using var-args) 92 class JavaCallArguments : public StackObj { 93 private: 94 enum Constants { 95 _default_size = 8 // Must be at least # of arguments in JavaCalls methods 96 }; 97 98 intptr_t _value_buffer [_default_size + 1]; 99 bool _is_oop_buffer[_default_size + 1]; 100 101 intptr_t* _value; 102 bool* _is_oop; 103 int _size; 104 int _max_size; 105 bool _start_at_zero; // Support late setting of receiver 106 107 void initialize() { 108 // Starts at first element to support set_receiver. 109 _value = &_value_buffer[1]; 110 _is_oop = &_is_oop_buffer[1]; 111 112 _max_size = _default_size; 113 _size = 0; 114 _start_at_zero = false; 115 } 116 117 public: 118 JavaCallArguments() { initialize(); } 119 120 JavaCallArguments(Handle receiver) { 121 initialize(); 122 push_oop(receiver); 123 } 124 125 JavaCallArguments(int max_size) { 126 if (max_size > _default_size) { 127 _value = NEW_RESOURCE_ARRAY(intptr_t, max_size + 1); 128 _is_oop = NEW_RESOURCE_ARRAY(bool, max_size + 1); 129 130 // Reserve room for potential receiver in value and is_oop 131 _value++; _is_oop++; 132 133 _max_size = max_size; 134 _size = 0; 135 _start_at_zero = false; 136 } else { 137 initialize(); 138 } 139 } 140 141 inline void push_oop(Handle h) { _is_oop[_size] = true; 142 JNITypes::put_obj((oop)h.raw_value(), _value, _size); } 143 144 inline void push_int(int i) { _is_oop[_size] = false; 145 JNITypes::put_int(i, _value, _size); } 146 147 inline void push_double(double d) { _is_oop[_size] = false; _is_oop[_size + 1] = false; 148 JNITypes::put_double(d, _value, _size); } 149 150 inline void push_long(jlong l) { _is_oop[_size] = false; _is_oop[_size + 1] = false; 151 JNITypes::put_long(l, _value, _size); } 152 153 inline void push_float(float f) { _is_oop[_size] = false; 154 JNITypes::put_float(f, _value, _size); } 155 156 // receiver 157 Handle receiver() { 158 assert(_size > 0, "must at least be one argument"); 159 assert(_is_oop[0], "first argument must be an oop"); 160 assert(_value[0] != 0, "receiver must be not-null"); | 86 bool is_first_frame() const { return _anchor.last_Java_sp() == NULL; } 87 88 }; 89 90 91 // Encapsulates arguments to a JavaCall (faster, safer, and more convenient than using var-args) 92 class JavaCallArguments : public StackObj { 93 private: 94 enum Constants { 95 _default_size = 8 // Must be at least # of arguments in JavaCalls methods 96 }; 97 98 intptr_t _value_buffer [_default_size + 1]; 99 bool _is_oop_buffer[_default_size + 1]; 100 101 intptr_t* _value; 102 bool* _is_oop; 103 int _size; 104 int _max_size; 105 bool _start_at_zero; // Support late setting of receiver 106 JVMCI_ONLY(nmethod* _alternative_target;) // Nmethod that should be called instead of normal target 107 108 void initialize() { 109 // Starts at first element to support set_receiver. 110 _value = &_value_buffer[1]; 111 _is_oop = &_is_oop_buffer[1]; 112 113 _max_size = _default_size; 114 _size = 0; 115 _start_at_zero = false; 116 JVMCI_ONLY(_alternative_target = NULL;) 117 } 118 119 public: 120 JavaCallArguments() { initialize(); } 121 122 JavaCallArguments(Handle receiver) { 123 initialize(); 124 push_oop(receiver); 125 } 126 127 JavaCallArguments(int max_size) { 128 if (max_size > _default_size) { 129 _value = NEW_RESOURCE_ARRAY(intptr_t, max_size + 1); 130 _is_oop = NEW_RESOURCE_ARRAY(bool, max_size + 1); 131 132 // Reserve room for potential receiver in value and is_oop 133 _value++; _is_oop++; 134 135 _max_size = max_size; 136 _size = 0; 137 _start_at_zero = false; 138 JVMCI_ONLY(_alternative_target = NULL;) 139 } else { 140 initialize(); 141 } 142 } 143 144 #if INCLUDE_JVMCI 145 void set_alternative_target(nmethod* target) { 146 _alternative_target = target; 147 } 148 149 nmethod* alternative_target() { 150 return _alternative_target; 151 } 152 #endif 153 154 inline void push_oop(Handle h) { _is_oop[_size] = true; 155 JNITypes::put_obj((oop)h.raw_value(), _value, _size); } 156 157 inline void push_int(int i) { _is_oop[_size] = false; 158 JNITypes::put_int(i, _value, _size); } 159 160 inline void push_double(double d) { _is_oop[_size] = false; _is_oop[_size + 1] = false; 161 JNITypes::put_double(d, _value, _size); } 162 163 inline void push_long(jlong l) { _is_oop[_size] = false; _is_oop[_size + 1] = false; 164 JNITypes::put_long(l, _value, _size); } 165 166 inline void push_float(float f) { _is_oop[_size] = false; 167 JNITypes::put_float(f, _value, _size); } 168 169 // receiver 170 Handle receiver() { 171 assert(_size > 0, "must at least be one argument"); 172 assert(_is_oop[0], "first argument must be an oop"); 173 assert(_value[0] != 0, "receiver must be not-null"); |