0
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1 /*
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2 * Copyright 1997-2007 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 // A methodOop represents a Java method.
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26 //
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27 // Memory layout (each line represents a word). Note that most applications load thousands of methods,
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28 // so keeping the size of this structure small has a big impact on footprint.
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29 //
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30 // We put all oops and method_size first for better gc cache locality.
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31 //
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32 // The actual bytecodes are inlined after the end of the methodOopDesc struct.
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33 //
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34 // There are bits in the access_flags telling whether inlined tables are present.
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35 // Note that accessing the line number and local variable tables is not performance critical at all.
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36 // Accessing the checked exceptions table is used by reflection, so we put that last to make access
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37 // to it fast.
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38 //
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39 // The line number table is compressed and inlined following the byte codes. It is found as the first
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40 // byte following the byte codes. The checked exceptions table and the local variable table are inlined
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41 // after the line number table, and indexed from the end of the method. We do not compress the checked
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42 // exceptions table since the average length is less than 2, and do not bother to compress the local
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43 // variable table either since it is mostly absent.
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44 //
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45 // Note that native_function and signature_handler has to be at fixed offsets (required by the interpreter)
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46 //
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47 // |------------------------------------------------------|
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48 // | header |
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49 // | klass |
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50 // |------------------------------------------------------|
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51 // | constMethodOop (oop) |
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52 // | constants (oop) |
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53 // |------------------------------------------------------|
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54 // | methodData (oop) |
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55 // | interp_invocation_count |
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56 // |------------------------------------------------------|
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57 // | access_flags |
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58 // | vtable_index |
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59 // |------------------------------------------------------|
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60 // | result_index (C++ interpreter only) |
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61 // |------------------------------------------------------|
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62 // | method_size | max_stack |
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63 // | max_locals | size_of_parameters |
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64 // |------------------------------------------------------|
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65 // | intrinsic_id, highest_tier | (unused) |
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66 // |------------------------------------------------------|
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67 // | throwout_count | num_breakpoints |
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68 // |------------------------------------------------------|
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69 // | invocation_counter |
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70 // | backedge_counter |
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71 // |------------------------------------------------------|
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72 // | code (pointer) |
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73 // | i2i (pointer) |
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74 // | adapter (pointer) |
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75 // | from_compiled_entry (pointer) |
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76 // | from_interpreted_entry (pointer) |
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77 // |------------------------------------------------------|
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78 // | native_function (present only if native) |
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79 // | signature_handler (present only if native) |
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80 // |------------------------------------------------------|
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81
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82
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83 class CheckedExceptionElement;
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84 class LocalVariableTableElement;
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85 class AdapterHandlerEntry;
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86
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87 class methodDataOopDesc;
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88
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89 class methodOopDesc : public oopDesc {
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90 friend class methodKlass;
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91 friend class VMStructs;
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92 private:
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93 constMethodOop _constMethod; // Method read-only data.
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94 constantPoolOop _constants; // Constant pool
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95 methodDataOop _method_data;
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96 int _interpreter_invocation_count; // Count of times invoked
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97 AccessFlags _access_flags; // Access flags
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98 int _vtable_index; // vtable index of this method (see VtableIndexFlag)
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99 // note: can have vtables with >2**16 elements (because of inheritance)
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100 #ifdef CC_INTERP
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101 int _result_index; // C++ interpreter needs for converting results to/from stack
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102 #endif
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103 u2 _method_size; // size of this object
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104 u2 _max_stack; // Maximum number of entries on the expression stack
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105 u2 _max_locals; // Number of local variables used by this method
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106 u2 _size_of_parameters; // size of the parameter block (receiver + arguments) in words
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107 u1 _intrinsic_id_cache; // Cache for intrinsic_id; 0 or 1+vmInt::ID
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108 u1 _highest_tier_compile; // Highest compile level this method has ever seen.
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109 u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting
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110 u2 _number_of_breakpoints; // fullspeed debugging support
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111 InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations
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112 InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations
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113 #ifndef PRODUCT
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114 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging)
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115 #endif
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116 // Entry point for calling both from and to the interpreter.
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117 address _i2i_entry; // All-args-on-stack calling convention
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118 // Adapter blob (i2c/c2i) for this methodOop. Set once when method is linked.
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119 AdapterHandlerEntry* _adapter;
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120 // Entry point for calling from compiled code, to compiled code if it exists
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121 // or else the interpreter.
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122 volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry()
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123 // The entry point for calling both from and to compiled code is
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124 // "_code->entry_point()". Because of tiered compilation and de-opt, this
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125 // field can come and go. It can transition from NULL to not-null at any
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126 // time (whenever a compile completes). It can transition from not-null to
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127 // NULL only at safepoints (because of a de-opt).
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128 nmethod* volatile _code; // Points to the corresponding piece of native code
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129 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry
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130
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131 public:
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132 // accessors for instance variables
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133 constMethodOop constMethod() const { return _constMethod; }
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134 void set_constMethod(constMethodOop xconst) { oop_store_without_check((oop*)&_constMethod, (oop)xconst); }
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135
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136
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137 static address make_adapters(methodHandle mh, TRAPS);
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138 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); }
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139 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); }
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140
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141 // access flag
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142 AccessFlags access_flags() const { return _access_flags; }
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143 void set_access_flags(AccessFlags flags) { _access_flags = flags; }
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144
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145 // name
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146 symbolOop name() const { return _constants->symbol_at(name_index()); }
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147 int name_index() const { return constMethod()->name_index(); }
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148 void set_name_index(int index) { constMethod()->set_name_index(index); }
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149
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150 // signature
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151 symbolOop signature() const { return _constants->symbol_at(signature_index()); }
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152 int signature_index() const { return constMethod()->signature_index(); }
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153 void set_signature_index(int index) { constMethod()->set_signature_index(index); }
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154
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155 // generics support
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156 symbolOop generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? _constants->symbol_at(idx) : (symbolOop)NULL); }
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157 int generic_signature_index() const { return constMethod()->generic_signature_index(); }
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158 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); }
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159
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160 // annotations support
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161 typeArrayOop annotations() const { return instanceKlass::cast(method_holder())->get_method_annotations_of(method_idnum()); }
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162 typeArrayOop parameter_annotations() const { return instanceKlass::cast(method_holder())->get_method_parameter_annotations_of(method_idnum()); }
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163 typeArrayOop annotation_default() const { return instanceKlass::cast(method_holder())->get_method_default_annotations_of(method_idnum()); }
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164
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165 #ifdef CC_INTERP
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166 void set_result_index(BasicType type);
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167 int result_index() { return _result_index; }
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168 #endif
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169
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170 // Helper routine: get klass name + "." + method name + signature as
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171 // C string, for the purpose of providing more useful NoSuchMethodErrors
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172 // and fatal error handling. The string is allocated in resource
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173 // area if a buffer is not provided by the caller.
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174 char* name_and_sig_as_C_string();
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175 char* name_and_sig_as_C_string(char* buf, int size);
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176
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177 // Static routine in the situations we don't have a methodOop
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178 static char* name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature);
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179 static char* name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature, char* buf, int size);
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180
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181 // JVMTI breakpoints
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182 Bytecodes::Code orig_bytecode_at(int bci);
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183 void set_orig_bytecode_at(int bci, Bytecodes::Code code);
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184 void set_breakpoint(int bci);
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185 void clear_breakpoint(int bci);
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186 void clear_all_breakpoints();
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187 // Tracking number of breakpoints, for fullspeed debugging.
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188 // Only mutated by VM thread.
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189 u2 number_of_breakpoints() const { return _number_of_breakpoints; }
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190 void incr_number_of_breakpoints() { ++_number_of_breakpoints; }
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191 void decr_number_of_breakpoints() { --_number_of_breakpoints; }
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192 // Initialization only
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193 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; }
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194
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195 // index into instanceKlass methods() array
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196 u2 method_idnum() const { return constMethod()->method_idnum(); }
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197 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); }
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198
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199 // code size
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200 int code_size() const { return constMethod()->code_size(); }
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201
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202 // method size
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203 int method_size() const { return _method_size; }
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204 void set_method_size(int size) {
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205 assert(0 <= size && size < (1 << 16), "invalid method size");
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206 _method_size = size;
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207 }
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208
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209 // constant pool for klassOop holding this method
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210 constantPoolOop constants() const { return _constants; }
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211 void set_constants(constantPoolOop c) { oop_store_without_check((oop*)&_constants, c); }
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212
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213 // max stack
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214 int max_stack() const { return _max_stack; }
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215 void set_max_stack(int size) { _max_stack = size; }
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216
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217 // max locals
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218 int max_locals() const { return _max_locals; }
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219 void set_max_locals(int size) { _max_locals = size; }
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220 int highest_tier_compile() { return _highest_tier_compile;}
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221 void set_highest_tier_compile(int level) { _highest_tier_compile = level;}
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222
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223 void clear_intrinsic_id_cache() { _intrinsic_id_cache = 0; }
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224
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225 // Count of times method was exited via exception while interpreting
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226 void interpreter_throwout_increment() {
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227 if (_interpreter_throwout_count < 65534) {
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228 _interpreter_throwout_count++;
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229 }
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230 }
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231
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232 int interpreter_throwout_count() const { return _interpreter_throwout_count; }
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233 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; }
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234
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235 // size of parameters
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236 int size_of_parameters() const { return _size_of_parameters; }
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237
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238 bool has_stackmap_table() const {
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239 return constMethod()->has_stackmap_table();
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240 }
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241
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242 typeArrayOop stackmap_data() const {
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243 return constMethod()->stackmap_data();
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244 }
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245
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246 // exception handler table
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247 typeArrayOop exception_table() const
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248 { return constMethod()->exception_table(); }
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249 void set_exception_table(typeArrayOop e)
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250 { constMethod()->set_exception_table(e); }
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251 bool has_exception_handler() const
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252 { return constMethod()->has_exception_handler(); }
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253
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254 // Finds the first entry point bci of an exception handler for an
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255 // exception of klass ex_klass thrown at throw_bci. A value of NULL
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256 // for ex_klass indicates that the exception klass is not known; in
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257 // this case it matches any constraint class. Returns -1 if the
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258 // exception cannot be handled in this method. The handler
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259 // constraint classes are loaded if necessary. Note that this may
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260 // throw an exception if loading of the constraint classes causes
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261 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError.
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262 // If an exception is thrown, returns the bci of the
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263 // exception handler which caused the exception to be thrown, which
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264 // is needed for proper retries. See, for example,
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265 // InterpreterRuntime::exception_handler_for_exception.
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266 int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS);
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267
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268 // method data access
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269 methodDataOop method_data() const {
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270 return _method_data;
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271 }
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272 void set_method_data(methodDataOop data) {
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273 oop_store_without_check((oop*)&_method_data, (oop)data);
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274 }
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275
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276 // invocation counter
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277 InvocationCounter* invocation_counter() { return &_invocation_counter; }
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278 InvocationCounter* backedge_counter() { return &_backedge_counter; }
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279 int invocation_count() const { return _invocation_counter.count(); }
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280 int backedge_count() const { return _backedge_counter.count(); }
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281 bool was_executed_more_than(int n) const;
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282 bool was_never_executed() const { return !was_executed_more_than(0); }
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283
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284 static void build_interpreter_method_data(methodHandle method, TRAPS);
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285
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286 int interpreter_invocation_count() const { return _interpreter_invocation_count; }
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287 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; }
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288 int increment_interpreter_invocation_count() { return ++_interpreter_invocation_count; }
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289
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290 #ifndef PRODUCT
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291 int compiled_invocation_count() const { return _compiled_invocation_count; }
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292 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; }
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293 #endif // not PRODUCT
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294
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295 // Clear (non-shared space) pointers which could not be relevent
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296 // if this (shared) method were mapped into another JVM.
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297 void remove_unshareable_info();
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298
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299 // nmethod/verified compiler entry
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300 address verified_code_entry();
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301 bool check_code() const; // Not inline to avoid circular ref
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302 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); }
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303 void clear_code(); // Clear out any compiled code
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304 void set_code(methodHandle mh, nmethod* code);
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305 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; }
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306 address get_i2c_entry();
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307 address get_c2i_entry();
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308 address get_c2i_unverified_entry();
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309 AdapterHandlerEntry* adapter() { return _adapter; }
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310 // setup entry points
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311 void link_method(methodHandle method, TRAPS);
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312 // clear entry points. Used by sharing code
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313 void unlink_method();
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314
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315 // vtable index
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316 enum VtableIndexFlag {
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317 // Valid vtable indexes are non-negative (>= 0).
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318 // These few negative values are used as sentinels.
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319 invalid_vtable_index = -4, // distinct from any valid vtable index
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320 garbage_vtable_index = -3, // not yet linked; no vtable layout yet
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321 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch
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322 // 6330203 Note: Do not use -1, which was overloaded with many meanings.
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323 };
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324 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; })
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325 int vtable_index() const { assert(valid_vtable_index(), "");
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326 return _vtable_index; }
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327 void set_vtable_index(int index) { _vtable_index = index; }
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328
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329 // interpreter entry
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330 address interpreter_entry() const { return _i2i_entry; }
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331 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry
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332 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; }
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333 int interpreter_kind(void) {
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334 return constMethod()->interpreter_kind();
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335 }
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336 void set_interpreter_kind();
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337 void set_interpreter_kind(int kind) {
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338 constMethod()->set_interpreter_kind(kind);
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339 }
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340
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341 // native function (used for native methods only)
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342 enum {
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343 native_bind_event_is_interesting = true
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344 };
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345 address native_function() const { return *(native_function_addr()); }
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346 // Must specify a real function (not NULL).
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347 // Use clear_native_function() to unregister.
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348 void set_native_function(address function, bool post_event_flag);
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349 bool has_native_function() const;
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350 void clear_native_function();
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351
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352 // signature handler (used for native methods only)
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353 address signature_handler() const { return *(signature_handler_addr()); }
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354 void set_signature_handler(address handler);
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355
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356 // Interpreter oopmap support
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357 void mask_for(int bci, InterpreterOopMap* mask);
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358
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359 #ifndef PRODUCT
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360 // operations on invocation counter
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361 void print_invocation_count() const;
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362 #endif
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363
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364 // byte codes
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365 address code_base() const { return constMethod()->code_base(); }
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366 bool contains(address bcp) const { return constMethod()->contains(bcp); }
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367
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368 // prints byte codes
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369 void print_codes() const { print_codes_on(tty); }
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370 void print_codes_on(outputStream* st) const PRODUCT_RETURN;
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371 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN;
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372
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373 // checked exceptions
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374 int checked_exceptions_length() const
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375 { return constMethod()->checked_exceptions_length(); }
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376 CheckedExceptionElement* checked_exceptions_start() const
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377 { return constMethod()->checked_exceptions_start(); }
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378
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379 // localvariable table
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380 bool has_localvariable_table() const
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381 { return constMethod()->has_localvariable_table(); }
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382 int localvariable_table_length() const
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383 { return constMethod()->localvariable_table_length(); }
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384 LocalVariableTableElement* localvariable_table_start() const
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385 { return constMethod()->localvariable_table_start(); }
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386
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387 bool has_linenumber_table() const
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388 { return constMethod()->has_linenumber_table(); }
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389 u_char* compressed_linenumber_table() const
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390 { return constMethod()->compressed_linenumber_table(); }
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391
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392 // method holder (the klassOop holding this method)
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393 klassOop method_holder() const { return _constants->pool_holder(); }
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394
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395 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments)
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396 symbolOop klass_name() const; // returns the name of the method holder
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397 BasicType result_type() const; // type of the method result
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398 int result_type_index() const; // type index of the method result
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399 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); }
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400 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); }
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401
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402 // Checked exceptions thrown by this method (resolved to mirrors)
|
|
403 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); }
|
|
404
|
|
405 // Access flags
|
|
406 bool is_public() const { return access_flags().is_public(); }
|
|
407 bool is_private() const { return access_flags().is_private(); }
|
|
408 bool is_protected() const { return access_flags().is_protected(); }
|
|
409 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); }
|
|
410 bool is_static() const { return access_flags().is_static(); }
|
|
411 bool is_final() const { return access_flags().is_final(); }
|
|
412 bool is_synchronized() const { return access_flags().is_synchronized();}
|
|
413 bool is_native() const { return access_flags().is_native(); }
|
|
414 bool is_abstract() const { return access_flags().is_abstract(); }
|
|
415 bool is_strict() const { return access_flags().is_strict(); }
|
|
416 bool is_synthetic() const { return access_flags().is_synthetic(); }
|
|
417
|
|
418 // returns true if contains only return operation
|
|
419 bool is_empty_method() const;
|
|
420
|
|
421 // returns true if this is a vanilla constructor
|
|
422 bool is_vanilla_constructor() const;
|
|
423
|
|
424 // checks method and its method holder
|
|
425 bool is_final_method() const;
|
|
426 bool is_strict_method() const;
|
|
427
|
|
428 // true if method needs no dynamic dispatch (final and/or no vtable entry)
|
|
429 bool can_be_statically_bound() const;
|
|
430
|
|
431 // returns true if the method has any backward branches.
|
|
432 bool has_loops() {
|
|
433 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag();
|
|
434 };
|
|
435
|
|
436 bool compute_has_loops_flag();
|
|
437
|
|
438 bool has_jsrs() {
|
|
439 return access_flags().has_jsrs();
|
|
440 };
|
|
441 void set_has_jsrs() {
|
|
442 _access_flags.set_has_jsrs();
|
|
443 }
|
|
444
|
|
445 // returns true if the method has any monitors.
|
|
446 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); }
|
|
447 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); }
|
|
448
|
|
449 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); }
|
|
450
|
|
451 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes
|
|
452 // propererly nest in the method. It might return false, even though they actually nest properly, since the info.
|
|
453 // has not been computed yet.
|
|
454 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); }
|
|
455 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); }
|
|
456
|
|
457 // returns true if the method is an accessor function (setter/getter).
|
|
458 bool is_accessor() const;
|
|
459
|
|
460 // returns true if the method is an initializer (<init> or <clinit>).
|
|
461 bool is_initializer() const;
|
|
462
|
|
463 // compiled code support
|
|
464 // NOTE: code() is inherently racy as deopt can be clearing code
|
|
465 // simultaneously. Use with caution.
|
|
466 bool has_compiled_code() const { return code() != NULL; }
|
|
467
|
|
468 // sizing
|
|
469 static int object_size(bool is_native);
|
|
470 static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; }
|
|
471 int object_size() const { return method_size(); }
|
|
472
|
|
473 bool object_is_parsable() const { return method_size() > 0; }
|
|
474
|
|
475 // interpreter support
|
|
476 static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); }
|
|
477 static ByteSize constants_offset() { return byte_offset_of(methodOopDesc, _constants ); }
|
|
478 static ByteSize access_flags_offset() { return byte_offset_of(methodOopDesc, _access_flags ); }
|
|
479 #ifdef CC_INTERP
|
|
480 static ByteSize result_index_offset() { return byte_offset_of(methodOopDesc, _result_index ); }
|
|
481 #endif /* CC_INTERP */
|
|
482 static ByteSize size_of_locals_offset() { return byte_offset_of(methodOopDesc, _max_locals ); }
|
|
483 static ByteSize size_of_parameters_offset() { return byte_offset_of(methodOopDesc, _size_of_parameters); }
|
|
484 static ByteSize from_compiled_offset() { return byte_offset_of(methodOopDesc, _from_compiled_entry); }
|
|
485 static ByteSize code_offset() { return byte_offset_of(methodOopDesc, _code); }
|
|
486 static ByteSize invocation_counter_offset() { return byte_offset_of(methodOopDesc, _invocation_counter); }
|
|
487 static ByteSize backedge_counter_offset() { return byte_offset_of(methodOopDesc, _backedge_counter); }
|
|
488 static ByteSize method_data_offset() {
|
|
489 return byte_offset_of(methodOopDesc, _method_data);
|
|
490 }
|
|
491 static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); }
|
|
492 #ifndef PRODUCT
|
|
493 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); }
|
|
494 #endif // not PRODUCT
|
|
495 static ByteSize native_function_offset() { return in_ByteSize(sizeof(methodOopDesc)); }
|
|
496 static ByteSize from_interpreted_offset() { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); }
|
|
497 static ByteSize interpreter_entry_offset() { return byte_offset_of(methodOopDesc, _i2i_entry ); }
|
|
498 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(methodOopDesc) + wordSize); }
|
|
499 static ByteSize max_stack_offset() { return byte_offset_of(methodOopDesc, _max_stack ); }
|
|
500
|
|
501 // for code generation
|
|
502 static int method_data_offset_in_bytes() { return offset_of(methodOopDesc, _method_data); }
|
|
503 static int interpreter_invocation_counter_offset_in_bytes()
|
|
504 { return offset_of(methodOopDesc, _interpreter_invocation_count); }
|
|
505
|
|
506 // Static methods that are used to implement member methods where an exposed this pointer
|
|
507 // is needed due to possible GCs
|
|
508 static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS);
|
|
509
|
|
510 // Returns the byte code index from the byte code pointer
|
|
511 int bci_from(address bcp) const;
|
|
512 address bcp_from(int bci) const;
|
|
513 int validate_bci_from_bcx(intptr_t bcx) const;
|
|
514
|
|
515 // Returns the line number for a bci if debugging information for the method is prowided,
|
|
516 // -1 is returned otherwise.
|
|
517 int line_number_from_bci(int bci) const;
|
|
518
|
|
519 // Reflection support
|
|
520 bool is_overridden_in(klassOop k) const;
|
|
521
|
|
522 // RedefineClasses() support:
|
|
523 bool is_old() const { return access_flags().is_old(); }
|
|
524 void set_is_old() { _access_flags.set_is_old(); }
|
|
525 bool is_obsolete() const { return access_flags().is_obsolete(); }
|
|
526 void set_is_obsolete() { _access_flags.set_is_obsolete(); }
|
|
527
|
|
528 // JVMTI Native method prefixing support:
|
|
529 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); }
|
|
530 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); }
|
|
531
|
|
532 // Rewriting support
|
|
533 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length,
|
|
534 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS);
|
|
535
|
|
536 // Get this method's jmethodID -- allocate if it doesn't exist
|
|
537 jmethodID jmethod_id() { methodHandle this_h(this);
|
|
538 return instanceKlass::jmethod_id_for_impl(method_holder(), this_h); }
|
|
539
|
|
540 // Lookup the jmethodID for this method. Return NULL if not found.
|
|
541 // NOTE that this function can be called from a signal handler
|
|
542 // (see AsyncGetCallTrace support for Forte Analyzer) and this
|
|
543 // needs to be async-safe. No allocation should be done and
|
|
544 // so handles are not used to avoid deadlock.
|
|
545 jmethodID find_jmethod_id_or_null() { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); }
|
|
546
|
|
547 // JNI static invoke cached itable index accessors
|
|
548 int cached_itable_index() { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); }
|
|
549 void set_cached_itable_index(int index) { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); }
|
|
550
|
|
551 // Support for inlining of intrinsic methods
|
|
552 vmIntrinsics::ID intrinsic_id() const { // returns zero if not an intrinsic
|
|
553 const u1& cache = _intrinsic_id_cache;
|
|
554 if (cache != 0) {
|
|
555 return (vmIntrinsics::ID)(cache - 1);
|
|
556 } else {
|
|
557 vmIntrinsics::ID id = compute_intrinsic_id();
|
|
558 *(u1*)&cache = ((u1) id) + 1; // force the cache to be non-const
|
|
559 vmIntrinsics::verify_method(id, (methodOop) this);
|
|
560 assert((vmIntrinsics::ID)(cache - 1) == id, "proper conversion");
|
|
561 return id;
|
|
562 }
|
|
563 }
|
|
564
|
|
565 // On-stack replacement support
|
|
566 bool has_osr_nmethod() { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci) != NULL; }
|
|
567 nmethod* lookup_osr_nmethod_for(int bci) { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci); }
|
|
568
|
|
569 // Inline cache support
|
|
570 void cleanup_inline_caches();
|
|
571
|
|
572 // Find if klass for method is loaded
|
|
573 bool is_klass_loaded_by_klass_index(int klass_index) const;
|
|
574 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const;
|
|
575
|
|
576 // Indicates whether compilation failed earlier for this method, or
|
|
577 // whether it is not compilable for another reason like having a
|
|
578 // breakpoint set in it.
|
|
579 bool is_not_compilable(int comp_level = CompLevel_highest_tier) const;
|
|
580 void set_not_compilable(int comp_level = CompLevel_highest_tier);
|
|
581
|
|
582 bool is_not_osr_compilable() const { return is_not_compilable() || access_flags().is_not_osr_compilable(); }
|
|
583 void set_not_osr_compilable() { _access_flags.set_not_osr_compilable(); }
|
|
584
|
|
585 bool is_not_tier1_compilable() const { return access_flags().is_not_tier1_compilable(); }
|
|
586 void set_not_tier1_compilable() { _access_flags.set_not_tier1_compilable(); }
|
|
587
|
|
588 // Background compilation support
|
|
589 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); }
|
|
590 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); }
|
|
591 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); }
|
|
592
|
|
593 static methodOop method_from_bcp(address bcp);
|
|
594
|
|
595 // Resolve all classes in signature, return 'true' if successful
|
|
596 static bool load_signature_classes(methodHandle m, TRAPS);
|
|
597
|
|
598 // Return if true if not all classes references in signature, including return type, has been loaded
|
|
599 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS);
|
|
600
|
|
601 // Printing
|
|
602 void print_short_name(outputStream* st) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM
|
|
603 void print_name(outputStream* st) PRODUCT_RETURN; // prints as "virtual void foo(int)"
|
|
604
|
|
605 // Helper routine used for method sorting
|
|
606 static void sort_methods(objArrayOop methods,
|
|
607 objArrayOop methods_annotations,
|
|
608 objArrayOop methods_parameter_annotations,
|
|
609 objArrayOop methods_default_annotations,
|
|
610 bool idempotent = false);
|
|
611
|
|
612 // size of parameters
|
|
613 void set_size_of_parameters(int size) { _size_of_parameters = size; }
|
|
614 private:
|
|
615
|
|
616 // Helper routine for intrinsic_id().
|
|
617 vmIntrinsics::ID compute_intrinsic_id() const;
|
|
618
|
|
619 // Inlined elements
|
|
620 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); }
|
|
621 address* signature_handler_addr() const { return native_function_addr() + 1; }
|
|
622
|
|
623 // Garbage collection support
|
|
624 oop* adr_constMethod() const { return (oop*)&_constMethod; }
|
|
625 oop* adr_constants() const { return (oop*)&_constants; }
|
|
626 oop* adr_method_data() const { return (oop*)&_method_data; }
|
|
627 };
|
|
628
|
|
629
|
|
630 // Utility class for compressing line number tables
|
|
631
|
|
632 class CompressedLineNumberWriteStream: public CompressedWriteStream {
|
|
633 private:
|
|
634 int _bci;
|
|
635 int _line;
|
|
636 public:
|
|
637 // Constructor
|
|
638 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {}
|
|
639 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {}
|
|
640
|
|
641 // Write (bci, line number) pair to stream
|
|
642 void write_pair_regular(int bci_delta, int line_delta);
|
|
643
|
|
644 inline void write_pair_inline(int bci, int line) {
|
|
645 int bci_delta = bci - _bci;
|
|
646 int line_delta = line - _line;
|
|
647 _bci = bci;
|
|
648 _line = line;
|
|
649 // Skip (0,0) deltas - they do not add information and conflict with terminator.
|
|
650 if (bci_delta == 0 && line_delta == 0) return;
|
|
651 // Check if bci is 5-bit and line number 3-bit unsigned.
|
|
652 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) {
|
|
653 // Compress into single byte.
|
|
654 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta;
|
|
655 // Check that value doesn't match escape character.
|
|
656 if (value != 0xFF) {
|
|
657 write_byte(value);
|
|
658 return;
|
|
659 }
|
|
660 }
|
|
661 write_pair_regular(bci_delta, line_delta);
|
|
662 }
|
|
663
|
|
664 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair.
|
|
665 // Disabling optimization doesn't work for methods in header files
|
|
666 // so we force it to call through the non-optimized version in the .cpp.
|
|
667 // It's gross, but it's the only way we can ensure that all callers are
|
|
668 // fixed. MSC_VER is defined in build/windows/makefiles/compile.make.
|
|
669 #if defined(_M_AMD64) && MSC_VER >= 1400
|
|
670 void write_pair(int bci, int line);
|
|
671 #else
|
|
672 void write_pair(int bci, int line) { write_pair_inline(bci, line); }
|
|
673 #endif
|
|
674
|
|
675 // Write end-of-stream marker
|
|
676 void write_terminator() { write_byte(0); }
|
|
677 };
|
|
678
|
|
679
|
|
680 // Utility class for decompressing line number tables
|
|
681
|
|
682 class CompressedLineNumberReadStream: public CompressedReadStream {
|
|
683 private:
|
|
684 int _bci;
|
|
685 int _line;
|
|
686 public:
|
|
687 // Constructor
|
|
688 CompressedLineNumberReadStream(u_char* buffer);
|
|
689 // Read (bci, line number) pair from stream. Returns false at end-of-stream.
|
|
690 bool read_pair();
|
|
691 // Accessing bci and line number (after calling read_pair)
|
|
692 int bci() const { return _bci; }
|
|
693 int line() const { return _line; }
|
|
694 };
|
|
695
|
|
696
|
|
697 /// Fast Breakpoints.
|
|
698
|
|
699 // If this structure gets more complicated (because bpts get numerous),
|
|
700 // move it into its own header.
|
|
701
|
|
702 // There is presently no provision for concurrent access
|
|
703 // to breakpoint lists, which is only OK for JVMTI because
|
|
704 // breakpoints are written only at safepoints, and are read
|
|
705 // concurrently only outside of safepoints.
|
|
706
|
|
707 class BreakpointInfo : public CHeapObj {
|
|
708 friend class VMStructs;
|
|
709 private:
|
|
710 Bytecodes::Code _orig_bytecode;
|
|
711 int _bci;
|
|
712 u2 _name_index; // of method
|
|
713 u2 _signature_index; // of method
|
|
714 BreakpointInfo* _next; // simple storage allocation
|
|
715
|
|
716 public:
|
|
717 BreakpointInfo(methodOop m, int bci);
|
|
718
|
|
719 // accessors
|
|
720 Bytecodes::Code orig_bytecode() { return _orig_bytecode; }
|
|
721 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; }
|
|
722 int bci() { return _bci; }
|
|
723
|
|
724 BreakpointInfo* next() const { return _next; }
|
|
725 void set_next(BreakpointInfo* n) { _next = n; }
|
|
726
|
|
727 // helps for searchers
|
|
728 bool match(methodOop m, int bci) {
|
|
729 return bci == _bci && match(m);
|
|
730 }
|
|
731
|
|
732 bool match(methodOop m) {
|
|
733 return _name_index == m->name_index() &&
|
|
734 _signature_index == m->signature_index();
|
|
735 }
|
|
736
|
|
737 void set(methodOop method);
|
|
738 void clear(methodOop method);
|
|
739 };
|