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1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 #ifndef SHARE_VM_RUNTIME_JAVACALLS_HPP |
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26 #define SHARE_VM_RUNTIME_JAVACALLS_HPP |
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27 |
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28 #include "memory/allocation.hpp" |
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29 #include "oops/method.hpp" |
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30 #include "runtime/handles.hpp" |
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31 #include "runtime/javaFrameAnchor.hpp" |
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32 #include "runtime/thread.inline.hpp" |
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33 #include "runtime/vmThread.hpp" |
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34 #ifdef TARGET_ARCH_x86 |
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35 # include "jniTypes_x86.hpp" |
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36 #endif |
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37 #ifdef TARGET_ARCH_sparc |
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38 # include "jniTypes_sparc.hpp" |
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39 #endif |
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40 #ifdef TARGET_ARCH_zero |
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41 # include "jniTypes_zero.hpp" |
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42 #endif |
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43 #ifdef TARGET_ARCH_arm |
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44 # include "jniTypes_arm.hpp" |
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45 #endif |
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46 #ifdef TARGET_ARCH_ppc |
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47 # include "jniTypes_ppc.hpp" |
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48 #endif |
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49 |
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50 // A JavaCallWrapper is constructed before each JavaCall and destructed after the call. |
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51 // Its purpose is to allocate/deallocate a new handle block and to save/restore the last |
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52 // Java fp/sp. A pointer to the JavaCallWrapper is stored on the stack. |
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53 |
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54 class JavaCallWrapper: StackObj { |
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55 friend class VMStructs; |
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56 private: |
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57 JavaThread* _thread; // the thread to which this call belongs |
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58 JNIHandleBlock* _handles; // the saved handle block |
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59 Method* _callee_method; // to be able to collect arguments if entry frame is top frame |
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60 oop _receiver; // the receiver of the call (if a non-static call) |
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61 |
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62 JavaFrameAnchor _anchor; // last thread anchor state that we must restore |
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63 |
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64 JavaValue* _result; // result value |
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65 |
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66 public: |
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67 // Construction/destruction |
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68 JavaCallWrapper(methodHandle callee_method, Handle receiver, JavaValue* result, TRAPS); |
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69 ~JavaCallWrapper(); |
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70 |
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71 // Accessors |
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72 JavaThread* thread() const { return _thread; } |
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73 JNIHandleBlock* handles() const { return _handles; } |
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74 |
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75 JavaFrameAnchor* anchor(void) { return &_anchor; } |
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76 |
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77 JavaValue* result() const { return _result; } |
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78 // GC support |
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79 Method* callee_method() { return _callee_method; } |
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80 oop receiver() { return _receiver; } |
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81 void oops_do(OopClosure* f); |
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82 |
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83 bool is_first_frame() const { return _anchor.last_Java_sp() == NULL; } |
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84 |
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85 }; |
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86 |
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87 |
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88 // Encapsulates arguments to a JavaCall (faster, safer, and more convenient than using var-args) |
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89 class JavaCallArguments : public StackObj { |
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90 private: |
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91 enum Constants { |
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92 _default_size = 8 // Must be at least # of arguments in JavaCalls methods |
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93 }; |
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94 |
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95 intptr_t _value_buffer [_default_size + 1]; |
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96 bool _is_oop_buffer[_default_size + 1]; |
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97 |
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98 intptr_t* _value; |
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99 bool* _is_oop; |
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100 int _size; |
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101 int _max_size; |
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102 bool _start_at_zero; // Support late setting of receiver |
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103 |
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104 void initialize() { |
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105 // Starts at first element to support set_receiver. |
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106 _value = &_value_buffer[1]; |
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107 _is_oop = &_is_oop_buffer[1]; |
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108 |
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109 _max_size = _default_size; |
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110 _size = 0; |
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111 _start_at_zero = false; |
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112 } |
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113 |
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114 public: |
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115 JavaCallArguments() { initialize(); } |
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116 |
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117 JavaCallArguments(Handle receiver) { |
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118 initialize(); |
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119 push_oop(receiver); |
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120 } |
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121 |
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122 JavaCallArguments(int max_size) { |
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123 if (max_size > _default_size) { |
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124 _value = NEW_RESOURCE_ARRAY(intptr_t, max_size + 1); |
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125 _is_oop = NEW_RESOURCE_ARRAY(bool, max_size + 1); |
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126 |
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127 // Reserve room for potential receiver in value and is_oop |
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128 _value++; _is_oop++; |
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129 |
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130 _max_size = max_size; |
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131 _size = 0; |
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132 _start_at_zero = false; |
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133 } else { |
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134 initialize(); |
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135 } |
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136 } |
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137 |
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138 inline void push_oop(Handle h) { _is_oop[_size] = true; |
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139 JNITypes::put_obj((oop)h.raw_value(), _value, _size); } |
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140 |
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141 inline void push_int(int i) { _is_oop[_size] = false; |
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142 JNITypes::put_int(i, _value, _size); } |
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143 |
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144 inline void push_double(double d) { _is_oop[_size] = false; _is_oop[_size + 1] = false; |
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145 JNITypes::put_double(d, _value, _size); } |
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146 |
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147 inline void push_long(jlong l) { _is_oop[_size] = false; _is_oop[_size + 1] = false; |
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148 JNITypes::put_long(l, _value, _size); } |
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149 |
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150 inline void push_float(float f) { _is_oop[_size] = false; |
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151 JNITypes::put_float(f, _value, _size); } |
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152 |
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153 // receiver |
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154 Handle receiver() { |
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155 assert(_size > 0, "must at least be one argument"); |
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156 assert(_is_oop[0], "first argument must be an oop"); |
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157 assert(_value[0] != 0, "receiver must be not-null"); |
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158 return Handle((oop*)_value[0], false); |
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159 } |
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160 |
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161 void set_receiver(Handle h) { |
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162 assert(_start_at_zero == false, "can only be called once"); |
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163 _start_at_zero = true; |
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164 _is_oop--; |
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165 _value--; |
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166 _size++; |
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167 _is_oop[0] = true; |
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168 _value[0] = (intptr_t)h.raw_value(); |
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169 } |
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170 |
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171 // Converts all Handles to oops, and returns a reference to parameter vector |
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172 intptr_t* parameters() ; |
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173 int size_of_parameters() const { return _size; } |
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174 |
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175 // Verify that pushed arguments fits a given method |
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176 void verify(methodHandle method, BasicType return_type, Thread *thread); |
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177 }; |
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178 |
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179 // All calls to Java have to go via JavaCalls. Sets up the stack frame |
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180 // and makes sure that the last_Java_frame pointers are chained correctly. |
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181 // |
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182 |
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183 class JavaCalls: AllStatic { |
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184 static void call_helper(JavaValue* result, methodHandle* method, JavaCallArguments* args, TRAPS); |
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185 public: |
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186 // Optimized Constuctor call |
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187 static void call_default_constructor(JavaThread* thread, methodHandle method, Handle receiver, TRAPS); |
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188 |
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189 // call_special |
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190 // ------------ |
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191 // The receiver must be first oop in argument list |
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192 static void call_special(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS); |
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193 |
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194 static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS); // No args |
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195 static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS); |
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196 static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS); |
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197 |
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198 // virtual call |
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199 // ------------ |
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200 |
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201 // The receiver must be first oop in argument list |
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202 static void call_virtual(JavaValue* result, KlassHandle spec_klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS); |
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203 |
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204 static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, Symbol* name, Symbol* signature, TRAPS); // No args |
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205 static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS); |
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206 static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS); |
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207 |
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208 // Static call |
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209 // ----------- |
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210 static void call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, JavaCallArguments* args, TRAPS); |
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211 |
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212 static void call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, TRAPS); |
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213 static void call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, TRAPS); |
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214 static void call_static(JavaValue* result, KlassHandle klass, Symbol* name, Symbol* signature, Handle arg1, Handle arg2, TRAPS); |
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215 |
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216 // Low-level interface |
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217 static void call(JavaValue* result, methodHandle method, JavaCallArguments* args, TRAPS); |
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218 }; |
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219 |
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220 #endif // SHARE_VM_RUNTIME_JAVACALLS_HPP |