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1 /* |
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2 * Copyright 1999-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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20 * CA 95054 USA or visit www.sun.com if you need additional information or |
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21 * have any questions. |
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22 * |
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23 */ |
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24 |
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25 class ciMethodBlocks; |
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26 class MethodLiveness; |
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27 class BitMap; |
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28 class Arena; |
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29 class BCEscapeAnalyzer; |
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30 |
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31 |
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32 // ciMethod |
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33 // |
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34 // This class represents a methodOop in the HotSpot virtual |
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35 // machine. |
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36 class ciMethod : public ciObject { |
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37 friend class CompileBroker; |
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38 CI_PACKAGE_ACCESS |
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39 friend class ciEnv; |
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40 friend class ciExceptionHandlerStream; |
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41 |
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42 private: |
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43 // General method information. |
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44 ciFlags _flags; |
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45 ciSymbol* _name; |
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46 ciInstanceKlass* _holder; |
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47 ciSignature* _signature; |
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48 ciMethodData* _method_data; |
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49 BCEscapeAnalyzer* _bcea; |
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50 ciMethodBlocks* _method_blocks; |
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51 |
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52 // Code attributes. |
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53 int _code_size; |
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54 int _max_stack; |
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55 int _max_locals; |
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56 vmIntrinsics::ID _intrinsic_id; |
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57 int _handler_count; |
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58 int _interpreter_invocation_count; |
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59 int _interpreter_throwout_count; |
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60 |
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61 bool _uses_monitors; |
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62 bool _balanced_monitors; |
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63 bool _is_compilable; |
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64 bool _can_be_statically_bound; |
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65 |
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66 // Lazy fields, filled in on demand |
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67 address _code; |
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68 ciExceptionHandler** _exception_handlers; |
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69 |
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70 // Optional liveness analyzer. |
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71 MethodLiveness* _liveness; |
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72 #ifdef COMPILER2 |
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73 ciTypeFlow* _flow; |
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74 #endif |
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75 |
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76 ciMethod(methodHandle h_m); |
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77 ciMethod(ciInstanceKlass* holder, ciSymbol* name, ciSymbol* signature); |
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78 |
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79 methodOop get_methodOop() const { |
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80 methodOop m = (methodOop)get_oop(); |
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81 assert(m != NULL, "illegal use of unloaded method"); |
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82 return m; |
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83 } |
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84 |
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85 oop loader() const { return _holder->loader(); } |
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86 |
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87 const char* type_string() { return "ciMethod"; } |
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88 |
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89 void print_impl(outputStream* st); |
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90 |
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91 void load_code(); |
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92 |
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93 void check_is_loaded() const { assert(is_loaded(), "not loaded"); } |
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94 |
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95 void build_method_data(methodHandle h_m); |
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96 |
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97 void code_at_put(int bci, Bytecodes::Code code) { |
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98 Bytecodes::check(code); |
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99 assert(0 <= bci && bci < code_size(), "valid bci"); |
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100 address bcp = _code + bci; |
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101 *bcp = code; |
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102 } |
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103 |
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104 public: |
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105 // Basic method information. |
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106 ciFlags flags() const { check_is_loaded(); return _flags; } |
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107 ciSymbol* name() const { return _name; } |
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108 ciInstanceKlass* holder() const { return _holder; } |
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109 ciMethodData* method_data(); |
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110 |
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111 // Signature information. |
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112 ciSignature* signature() const { return _signature; } |
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113 ciType* return_type() const { return _signature->return_type(); } |
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114 int arg_size_no_receiver() const { return _signature->size(); } |
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115 int arg_size() const { return _signature->size() + (_flags.is_static() ? 0 : 1); } |
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116 |
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117 // Method code and related information. |
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118 address code() { if (_code == NULL) load_code(); return _code; } |
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119 int code_size() const { check_is_loaded(); return _code_size; } |
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120 int max_stack() const { check_is_loaded(); return _max_stack; } |
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121 int max_locals() const { check_is_loaded(); return _max_locals; } |
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122 vmIntrinsics::ID intrinsic_id() const { check_is_loaded(); return _intrinsic_id; } |
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123 bool has_exception_handlers() const { check_is_loaded(); return _handler_count > 0; } |
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124 int exception_table_length() const { check_is_loaded(); return _handler_count; } |
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125 int interpreter_invocation_count() const { check_is_loaded(); return _interpreter_invocation_count; } |
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126 int interpreter_throwout_count() const { check_is_loaded(); return _interpreter_throwout_count; } |
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127 |
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128 Bytecodes::Code java_code_at_bci(int bci) { |
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129 address bcp = code() + bci; |
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130 return Bytecodes::java_code_at(bcp); |
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131 } |
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132 BCEscapeAnalyzer *get_bcea(); |
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133 ciMethodBlocks *get_method_blocks(); |
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134 |
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135 bool has_linenumber_table() const; // length unknown until decompression |
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136 u_char* compressed_linenumber_table() const; // not preserved by gc |
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137 |
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138 int line_number_from_bci(int bci) const; |
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139 |
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140 // Runtime information. |
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141 int vtable_index(); |
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142 address native_entry(); |
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143 address interpreter_entry(); |
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144 |
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145 // Analysis and profiling. |
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146 // |
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147 // Usage note: liveness_at_bci and init_vars should be wrapped in ResourceMarks. |
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148 bool uses_monitors() const { return _uses_monitors; } // this one should go away, it has a misleading name |
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149 bool has_monitor_bytecodes() const { return _uses_monitors; } |
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150 bool has_balanced_monitors(); |
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151 |
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152 MethodLivenessResult liveness_at_bci(int bci); |
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153 |
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154 // Get the interpreters viewpoint on oop liveness. MethodLiveness is |
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155 // conservative in the sense that it may consider locals to be live which |
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156 // cannot be live, like in the case where a local could contain an oop or |
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157 // a primitive along different paths. In that case the local must be |
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158 // dead when those paths merge. Since the interpreter's viewpoint is |
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159 // used when gc'ing an interpreter frame we need to use its viewpoint |
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160 // during OSR when loading the locals. |
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161 |
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162 BitMap live_local_oops_at_bci(int bci); |
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163 |
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164 #ifdef COMPILER1 |
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165 const BitMap bci_block_start(); |
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166 #endif |
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167 |
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168 ciTypeFlow* get_flow_analysis(); |
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169 ciTypeFlow* get_osr_flow_analysis(int osr_bci); // alternate entry point |
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170 ciCallProfile call_profile_at_bci(int bci); |
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171 int interpreter_call_site_count(int bci); |
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172 |
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173 // Given a certain calling environment, find the monomorphic target |
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174 // for the call. Return NULL if the call is not monomorphic in |
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175 // its calling environment. |
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176 ciMethod* find_monomorphic_target(ciInstanceKlass* caller, |
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177 ciInstanceKlass* callee_holder, |
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178 ciInstanceKlass* actual_receiver); |
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179 |
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180 // Given a known receiver klass, find the target for the call. |
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181 // Return NULL if the call has no target or is abstract. |
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182 ciMethod* resolve_invoke(ciKlass* caller, ciKlass* exact_receiver); |
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183 |
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184 // Find the proper vtable index to invoke this method. |
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185 int resolve_vtable_index(ciKlass* caller, ciKlass* receiver); |
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186 |
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187 // Compilation directives |
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188 bool will_link(ciKlass* accessing_klass, |
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189 ciKlass* declared_method_holder, |
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190 Bytecodes::Code bc); |
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191 bool should_exclude(); |
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192 bool should_inline(); |
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193 bool should_not_inline(); |
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194 bool should_print_assembly(); |
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195 bool break_at_execute(); |
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196 bool has_option(const char *option); |
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197 bool can_be_compiled(); |
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198 bool can_be_osr_compiled(int entry_bci); |
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199 void set_not_compilable(); |
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200 bool has_compiled_code(); |
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201 int instructions_size(); |
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202 void log_nmethod_identity(xmlStream* log); |
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203 bool is_not_reached(int bci); |
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204 bool was_executed_more_than(int times); |
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205 bool has_unloaded_classes_in_signature(); |
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206 bool is_klass_loaded(int refinfo_index, bool must_be_resolved) const; |
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207 bool check_call(int refinfo_index, bool is_static) const; |
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208 void build_method_data(); // make sure it exists in the VM also |
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209 int scale_count(int count, float prof_factor = 1.); // make MDO count commensurate with IIC |
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210 |
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211 // What kind of ciObject is this? |
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212 bool is_method() { return true; } |
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213 |
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214 // Java access flags |
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215 bool is_public () const { return flags().is_public(); } |
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216 bool is_private () const { return flags().is_private(); } |
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217 bool is_protected () const { return flags().is_protected(); } |
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218 bool is_static () const { return flags().is_static(); } |
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219 bool is_final () const { return flags().is_final(); } |
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220 bool is_synchronized() const { return flags().is_synchronized(); } |
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221 bool is_native () const { return flags().is_native(); } |
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222 bool is_interface () const { return flags().is_interface(); } |
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223 bool is_abstract () const { return flags().is_abstract(); } |
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224 bool is_strict () const { return flags().is_strict(); } |
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225 |
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226 // Other flags |
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227 bool is_empty_method() const; |
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228 bool is_vanilla_constructor() const; |
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229 bool is_final_method() const { return is_final() || holder()->is_final(); } |
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230 bool has_loops () const; |
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231 bool has_jsrs () const; |
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232 bool is_accessor () const; |
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233 bool is_initializer () const; |
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234 bool can_be_statically_bound() const { return _can_be_statically_bound; } |
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235 |
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236 // Print the bytecodes of this method. |
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237 void print_codes_on(outputStream* st); |
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238 void print_codes() { |
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239 print_codes_on(tty); |
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240 } |
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241 void print_codes_on(int from, int to, outputStream* st); |
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242 |
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243 // Print the name of this method in various incarnations. |
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244 void print_name(outputStream* st = tty); |
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245 void print_short_name(outputStream* st = tty); |
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246 }; |