Mercurial > hg > truffle
annotate src/share/vm/oops/method.hpp @ 7176:59c790074993
8003635: NPG: AsynchGetCallTrace broken by Method* virtual call
Summary: Make metaspace::contains be lock free and used to see if something is in metaspace, also compare Method* with vtbl pointer.
Reviewed-by: dholmes, sspitsyn, dcubed, jmasa
| author | coleenp |
|---|---|
| date | Wed, 28 Nov 2012 17:50:21 -0500 |
| parents | 18fb7da42534 |
| children | 5505fbbae3d3 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
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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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_OOPS_METHODOOP_HPP |
| 26 #define SHARE_VM_OOPS_METHODOOP_HPP | |
| 27 | |
| 28 #include "classfile/vmSymbols.hpp" | |
| 29 #include "code/compressedStream.hpp" | |
| 30 #include "compiler/oopMap.hpp" | |
| 31 #include "interpreter/invocationCounter.hpp" | |
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32 #include "oops/annotations.hpp" |
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33 #include "oops/constantPool.hpp" |
| 1972 | 34 #include "oops/instanceKlass.hpp" |
| 35 #include "oops/oop.hpp" | |
| 36 #include "oops/typeArrayOop.hpp" | |
| 37 #include "utilities/accessFlags.hpp" | |
| 38 #include "utilities/growableArray.hpp" | |
| 39 | |
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40 // A Method* represents a Java method. |
| 0 | 41 // |
| 42 // Memory layout (each line represents a word). Note that most applications load thousands of methods, | |
| 43 // so keeping the size of this structure small has a big impact on footprint. | |
| 44 // | |
| 45 // We put all oops and method_size first for better gc cache locality. | |
| 46 // | |
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47 // The actual bytecodes are inlined after the end of the Method struct. |
| 0 | 48 // |
| 49 // There are bits in the access_flags telling whether inlined tables are present. | |
| 50 // Note that accessing the line number and local variable tables is not performance critical at all. | |
| 51 // Accessing the checked exceptions table is used by reflection, so we put that last to make access | |
| 52 // to it fast. | |
| 53 // | |
| 54 // The line number table is compressed and inlined following the byte codes. It is found as the first | |
| 55 // byte following the byte codes. The checked exceptions table and the local variable table are inlined | |
| 56 // after the line number table, and indexed from the end of the method. We do not compress the checked | |
| 57 // exceptions table since the average length is less than 2, and do not bother to compress the local | |
| 58 // variable table either since it is mostly absent. | |
| 59 // | |
| 60 // Note that native_function and signature_handler has to be at fixed offsets (required by the interpreter) | |
| 61 // | |
| 62 // |------------------------------------------------------| | |
| 63 // | header | | |
| 64 // | klass | | |
| 65 // |------------------------------------------------------| | |
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66 // | ConstMethod* (oop) | |
| 0 | 67 // |------------------------------------------------------| |
| 68 // | methodData (oop) | | |
| 69 // | interp_invocation_count | | |
| 70 // |------------------------------------------------------| | |
| 71 // | access_flags | | |
| 72 // | vtable_index | | |
| 73 // |------------------------------------------------------| | |
| 74 // | result_index (C++ interpreter only) | | |
| 75 // |------------------------------------------------------| | |
| 76 // | method_size | max_stack | | |
| 77 // | max_locals | size_of_parameters | | |
| 78 // |------------------------------------------------------| | |
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79 // |intrinsic_id| flags | throwout_count | |
| 0 | 80 // |------------------------------------------------------| |
| 1783 | 81 // | num_breakpoints | (unused) | |
| 0 | 82 // |------------------------------------------------------| |
| 83 // | invocation_counter | | |
| 84 // | backedge_counter | | |
| 85 // |------------------------------------------------------| | |
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86 // | prev_time (tiered only, 64 bit wide) | |
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87 // | | |
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88 // |------------------------------------------------------| |
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89 // | rate (tiered) | |
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90 // |------------------------------------------------------| |
| 0 | 91 // | code (pointer) | |
| 92 // | i2i (pointer) | | |
| 93 // | adapter (pointer) | | |
| 94 // | from_compiled_entry (pointer) | | |
| 95 // | from_interpreted_entry (pointer) | | |
| 96 // |------------------------------------------------------| | |
| 97 // | native_function (present only if native) | | |
| 98 // | signature_handler (present only if native) | | |
| 99 // |------------------------------------------------------| | |
| 100 | |
| 101 | |
| 102 class CheckedExceptionElement; | |
| 103 class LocalVariableTableElement; | |
| 104 class AdapterHandlerEntry; | |
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105 class MethodData; |
| 6934 | 106 class ConstMethod; |
| 0 | 107 |
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108 class Method : public Metadata { |
| 0 | 109 friend class VMStructs; |
| 110 private: | |
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111 ConstMethod* _constMethod; // Method read-only data. |
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112 MethodData* _method_data; |
| 1783 | 113 int _interpreter_invocation_count; // Count of times invoked (reused as prev_event_count in tiered) |
| 0 | 114 AccessFlags _access_flags; // Access flags |
| 115 int _vtable_index; // vtable index of this method (see VtableIndexFlag) | |
| 116 // note: can have vtables with >2**16 elements (because of inheritance) | |
| 117 #ifdef CC_INTERP | |
| 118 int _result_index; // C++ interpreter needs for converting results to/from stack | |
| 119 #endif | |
| 120 u2 _method_size; // size of this object | |
| 121 u2 _max_stack; // Maximum number of entries on the expression stack | |
| 122 u2 _max_locals; // Number of local variables used by this method | |
| 123 u2 _size_of_parameters; // size of the parameter block (receiver + arguments) in words | |
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124 u1 _intrinsic_id; // vmSymbols::intrinsic_id (0 == _none) |
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125 u1 _jfr_towrite : 1, // Flags |
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126 _force_inline : 1, |
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127 _hidden : 1, |
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128 _dont_inline : 1, |
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129 : 4; |
| 0 | 130 u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting |
| 131 u2 _number_of_breakpoints; // fullspeed debugging support | |
| 132 InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations | |
| 133 InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations | |
| 1783 | 134 |
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135 #ifdef TIERED |
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136 jlong _prev_time; // Previous time the rate was acquired |
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137 float _rate; // Events (invocation and backedge counter increments) per millisecond |
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138 #endif |
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139 |
| 0 | 140 #ifndef PRODUCT |
| 141 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging) | |
| 142 #endif | |
| 143 // Entry point for calling both from and to the interpreter. | |
| 144 address _i2i_entry; // All-args-on-stack calling convention | |
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145 // Adapter blob (i2c/c2i) for this Method*. Set once when method is linked. |
| 0 | 146 AdapterHandlerEntry* _adapter; |
| 147 // Entry point for calling from compiled code, to compiled code if it exists | |
| 148 // or else the interpreter. | |
| 149 volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry() | |
| 150 // The entry point for calling both from and to compiled code is | |
| 151 // "_code->entry_point()". Because of tiered compilation and de-opt, this | |
| 152 // field can come and go. It can transition from NULL to not-null at any | |
| 153 // time (whenever a compile completes). It can transition from not-null to | |
| 154 // NULL only at safepoints (because of a de-opt). | |
| 155 nmethod* volatile _code; // Points to the corresponding piece of native code | |
| 156 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry | |
| 157 | |
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158 // Constructor |
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159 Method(ConstMethod* xconst, AccessFlags access_flags, int size); |
| 0 | 160 public: |
| 6934 | 161 |
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162 static Method* allocate(ClassLoaderData* loader_data, |
| 6934 | 163 int byte_code_size, |
| 164 AccessFlags access_flags, | |
| 165 int compressed_line_number_size, | |
| 166 int localvariable_table_length, | |
| 167 int exception_table_length, | |
| 168 int checked_exceptions_length, | |
| 169 ConstMethod::MethodType method_type, | |
| 170 TRAPS); | |
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171 |
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172 // CDS and vtbl checking can create an empty Method to get vtbl pointer. |
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173 Method(){} |
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174 |
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175 // The Method vtable is restored by this call when the Method is in the |
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176 // shared archive. See patch_klass_vtables() in metaspaceShared.cpp for |
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177 // all the gory details. SA, dtrace and pstack helpers distinguish metadata |
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178 // by their vtable. |
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179 void restore_vtable() { guarantee(is_method(), "vtable restored by this call"); } |
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180 bool is_method() const volatile { return true; } |
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181 |
| 0 | 182 // accessors for instance variables |
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183 |
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184 ConstMethod* constMethod() const { return _constMethod; } |
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185 void set_constMethod(ConstMethod* xconst) { _constMethod = xconst; } |
| 0 | 186 |
| 187 | |
| 188 static address make_adapters(methodHandle mh, TRAPS); | |
| 189 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); } | |
| 190 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); } | |
| 191 | |
| 192 // access flag | |
| 193 AccessFlags access_flags() const { return _access_flags; } | |
| 194 void set_access_flags(AccessFlags flags) { _access_flags = flags; } | |
| 195 | |
| 196 // name | |
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197 Symbol* name() const { return constants()->symbol_at(name_index()); } |
| 0 | 198 int name_index() const { return constMethod()->name_index(); } |
| 199 void set_name_index(int index) { constMethod()->set_name_index(index); } | |
| 200 | |
| 201 // signature | |
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202 Symbol* signature() const { return constants()->symbol_at(signature_index()); } |
| 0 | 203 int signature_index() const { return constMethod()->signature_index(); } |
| 204 void set_signature_index(int index) { constMethod()->set_signature_index(index); } | |
| 205 | |
| 206 // generics support | |
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207 Symbol* generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? constants()->symbol_at(idx) : (Symbol*)NULL); } |
| 0 | 208 int generic_signature_index() const { return constMethod()->generic_signature_index(); } |
| 209 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); } | |
| 210 | |
| 211 // annotations support | |
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212 AnnotationArray* annotations() const { |
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213 InstanceKlass* ik = method_holder(); |
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214 if (ik->annotations() == NULL) { |
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215 return NULL; |
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216 } |
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217 return ik->annotations()->get_method_annotations_of(method_idnum()); |
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218 } |
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219 AnnotationArray* parameter_annotations() const { |
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220 InstanceKlass* ik = method_holder(); |
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221 if (ik->annotations() == NULL) { |
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222 return NULL; |
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223 } |
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224 return ik->annotations()->get_method_parameter_annotations_of(method_idnum()); |
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225 } |
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226 AnnotationArray* annotation_default() const { |
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227 InstanceKlass* ik = method_holder(); |
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228 if (ik->annotations() == NULL) { |
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229 return NULL; |
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230 } |
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231 return ik->annotations()->get_method_default_annotations_of(method_idnum()); |
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232 } |
| 0 | 233 |
| 234 #ifdef CC_INTERP | |
| 235 void set_result_index(BasicType type); | |
| 236 int result_index() { return _result_index; } | |
| 237 #endif | |
| 238 | |
| 239 // Helper routine: get klass name + "." + method name + signature as | |
| 240 // C string, for the purpose of providing more useful NoSuchMethodErrors | |
| 241 // and fatal error handling. The string is allocated in resource | |
| 242 // area if a buffer is not provided by the caller. | |
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243 char* name_and_sig_as_C_string() const; |
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244 char* name_and_sig_as_C_string(char* buf, int size) const; |
| 0 | 245 |
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246 // Static routine in the situations we don't have a Method* |
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247 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature); |
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248 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size); |
| 0 | 249 |
| 2142 | 250 Bytecodes::Code java_code_at(int bci) const { |
| 251 return Bytecodes::java_code_at(this, bcp_from(bci)); | |
| 252 } | |
| 253 Bytecodes::Code code_at(int bci) const { | |
| 254 return Bytecodes::code_at(this, bcp_from(bci)); | |
| 255 } | |
| 256 | |
| 0 | 257 // JVMTI breakpoints |
| 2142 | 258 Bytecodes::Code orig_bytecode_at(int bci) const; |
| 0 | 259 void set_orig_bytecode_at(int bci, Bytecodes::Code code); |
| 260 void set_breakpoint(int bci); | |
| 261 void clear_breakpoint(int bci); | |
| 262 void clear_all_breakpoints(); | |
| 263 // Tracking number of breakpoints, for fullspeed debugging. | |
| 264 // Only mutated by VM thread. | |
| 265 u2 number_of_breakpoints() const { return _number_of_breakpoints; } | |
| 266 void incr_number_of_breakpoints() { ++_number_of_breakpoints; } | |
| 267 void decr_number_of_breakpoints() { --_number_of_breakpoints; } | |
| 268 // Initialization only | |
| 269 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; } | |
| 270 | |
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271 // index into InstanceKlass methods() array |
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272 // note: also used by jfr |
| 0 | 273 u2 method_idnum() const { return constMethod()->method_idnum(); } |
| 274 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); } | |
| 275 | |
| 276 // code size | |
| 277 int code_size() const { return constMethod()->code_size(); } | |
| 278 | |
| 279 // method size | |
| 280 int method_size() const { return _method_size; } | |
| 281 void set_method_size(int size) { | |
| 282 assert(0 <= size && size < (1 << 16), "invalid method size"); | |
| 283 _method_size = size; | |
| 284 } | |
| 285 | |
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286 // constant pool for Klass* holding this method |
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287 ConstantPool* constants() const { return constMethod()->constants(); } |
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288 void set_constants(ConstantPool* c) { constMethod()->set_constants(c); } |
| 0 | 289 |
| 290 // max stack | |
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291 // return original max stack size for method verification |
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292 int verifier_max_stack() const { return _max_stack; } |
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293 int max_stack() const { return _max_stack + extra_stack_entries(); } |
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294 void set_max_stack(int size) { _max_stack = size; } |
| 0 | 295 |
| 296 // max locals | |
| 297 int max_locals() const { return _max_locals; } | |
| 298 void set_max_locals(int size) { _max_locals = size; } | |
| 1783 | 299 |
| 300 int highest_comp_level() const; | |
| 301 void set_highest_comp_level(int level); | |
| 302 int highest_osr_comp_level() const; | |
| 303 void set_highest_osr_comp_level(int level); | |
| 0 | 304 |
| 305 // Count of times method was exited via exception while interpreting | |
| 306 void interpreter_throwout_increment() { | |
| 307 if (_interpreter_throwout_count < 65534) { | |
| 308 _interpreter_throwout_count++; | |
| 309 } | |
| 310 } | |
| 311 | |
| 312 int interpreter_throwout_count() const { return _interpreter_throwout_count; } | |
| 313 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; } | |
| 314 | |
| 315 // size of parameters | |
| 316 int size_of_parameters() const { return _size_of_parameters; } | |
| 317 | |
| 318 bool has_stackmap_table() const { | |
| 319 return constMethod()->has_stackmap_table(); | |
| 320 } | |
| 321 | |
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322 Array<u1>* stackmap_data() const { |
| 0 | 323 return constMethod()->stackmap_data(); |
| 324 } | |
| 325 | |
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326 void set_stackmap_data(Array<u1>* sd) { |
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327 constMethod()->set_stackmap_data(sd); |
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328 } |
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329 |
| 0 | 330 // exception handler table |
| 331 bool has_exception_handler() const | |
| 332 { return constMethod()->has_exception_handler(); } | |
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333 int exception_table_length() const |
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334 { return constMethod()->exception_table_length(); } |
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335 ExceptionTableElement* exception_table_start() const |
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336 { return constMethod()->exception_table_start(); } |
| 0 | 337 |
| 338 // Finds the first entry point bci of an exception handler for an | |
| 339 // exception of klass ex_klass thrown at throw_bci. A value of NULL | |
| 340 // for ex_klass indicates that the exception klass is not known; in | |
| 341 // this case it matches any constraint class. Returns -1 if the | |
| 342 // exception cannot be handled in this method. The handler | |
| 343 // constraint classes are loaded if necessary. Note that this may | |
| 344 // throw an exception if loading of the constraint classes causes | |
| 345 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError. | |
| 346 // If an exception is thrown, returns the bci of the | |
| 347 // exception handler which caused the exception to be thrown, which | |
| 348 // is needed for proper retries. See, for example, | |
| 349 // InterpreterRuntime::exception_handler_for_exception. | |
| 350 int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS); | |
| 351 | |
| 352 // method data access | |
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353 MethodData* method_data() const { |
| 0 | 354 return _method_data; |
| 355 } | |
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356 void set_method_data(MethodData* data) { |
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357 _method_data = data; |
| 0 | 358 } |
| 359 | |
| 360 // invocation counter | |
| 1783 | 361 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
| 362 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
| 363 | |
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364 #ifdef TIERED |
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365 // We are reusing interpreter_invocation_count as a holder for the previous event count! |
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366 // We can do that since interpreter_invocation_count is not used in tiered. |
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367 int prev_event_count() const { return _interpreter_invocation_count; } |
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368 void set_prev_event_count(int count) { _interpreter_invocation_count = count; } |
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369 jlong prev_time() const { return _prev_time; } |
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370 void set_prev_time(jlong time) { _prev_time = time; } |
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371 float rate() const { return _rate; } |
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372 void set_rate(float rate) { _rate = rate; } |
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373 #endif |
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374 |
| 1783 | 375 int invocation_count(); |
| 376 int backedge_count(); | |
| 377 | |
| 378 bool was_executed_more_than(int n); | |
| 379 bool was_never_executed() { return !was_executed_more_than(0); } | |
| 0 | 380 |
| 381 static void build_interpreter_method_data(methodHandle method, TRAPS); | |
| 382 | |
| 1783 | 383 int interpreter_invocation_count() { |
| 384 if (TieredCompilation) return invocation_count(); | |
| 385 else return _interpreter_invocation_count; | |
| 386 } | |
| 0 | 387 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; } |
| 1783 | 388 int increment_interpreter_invocation_count() { |
| 389 if (TieredCompilation) ShouldNotReachHere(); | |
| 390 return ++_interpreter_invocation_count; | |
| 391 } | |
| 0 | 392 |
| 393 #ifndef PRODUCT | |
| 1783 | 394 int compiled_invocation_count() const { return _compiled_invocation_count; } |
| 0 | 395 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; } |
| 396 #endif // not PRODUCT | |
| 397 | |
| 605 | 398 // Clear (non-shared space) pointers which could not be relevant |
| 0 | 399 // if this (shared) method were mapped into another JVM. |
| 400 void remove_unshareable_info(); | |
| 401 | |
| 402 // nmethod/verified compiler entry | |
| 403 address verified_code_entry(); | |
| 404 bool check_code() const; // Not inline to avoid circular ref | |
| 405 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); } | |
| 406 void clear_code(); // Clear out any compiled code | |
| 1202 | 407 static void set_code(methodHandle mh, nmethod* code); |
| 0 | 408 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; } |
| 409 address get_i2c_entry(); | |
| 410 address get_c2i_entry(); | |
| 411 address get_c2i_unverified_entry(); | |
| 412 AdapterHandlerEntry* adapter() { return _adapter; } | |
| 413 // setup entry points | |
| 414 void link_method(methodHandle method, TRAPS); | |
| 415 // clear entry points. Used by sharing code | |
| 416 void unlink_method(); | |
| 417 | |
| 418 // vtable index | |
| 419 enum VtableIndexFlag { | |
| 420 // Valid vtable indexes are non-negative (>= 0). | |
| 421 // These few negative values are used as sentinels. | |
| 710 | 422 highest_unused_vtable_index_value = -5, |
| 0 | 423 invalid_vtable_index = -4, // distinct from any valid vtable index |
| 424 garbage_vtable_index = -3, // not yet linked; no vtable layout yet | |
| 425 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch | |
| 426 // 6330203 Note: Do not use -1, which was overloaded with many meanings. | |
| 427 }; | |
| 428 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; }) | |
| 429 int vtable_index() const { assert(valid_vtable_index(), ""); | |
| 430 return _vtable_index; } | |
| 431 void set_vtable_index(int index) { _vtable_index = index; } | |
| 432 | |
| 433 // interpreter entry | |
| 434 address interpreter_entry() const { return _i2i_entry; } | |
| 435 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry | |
| 436 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; } | |
| 437 int interpreter_kind(void) { | |
| 438 return constMethod()->interpreter_kind(); | |
| 439 } | |
| 440 void set_interpreter_kind(); | |
| 441 void set_interpreter_kind(int kind) { | |
| 442 constMethod()->set_interpreter_kind(kind); | |
| 443 } | |
| 444 | |
| 445 // native function (used for native methods only) | |
| 446 enum { | |
| 447 native_bind_event_is_interesting = true | |
| 448 }; | |
| 449 address native_function() const { return *(native_function_addr()); } | |
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450 address critical_native_function(); |
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451 |
| 0 | 452 // Must specify a real function (not NULL). |
| 453 // Use clear_native_function() to unregister. | |
| 454 void set_native_function(address function, bool post_event_flag); | |
| 455 bool has_native_function() const; | |
| 456 void clear_native_function(); | |
| 457 | |
| 458 // signature handler (used for native methods only) | |
| 459 address signature_handler() const { return *(signature_handler_addr()); } | |
| 460 void set_signature_handler(address handler); | |
| 461 | |
| 462 // Interpreter oopmap support | |
| 463 void mask_for(int bci, InterpreterOopMap* mask); | |
| 464 | |
| 465 #ifndef PRODUCT | |
| 466 // operations on invocation counter | |
| 1783 | 467 void print_invocation_count(); |
| 0 | 468 #endif |
| 469 | |
| 470 // byte codes | |
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471 void set_code(address code) { return constMethod()->set_code(code); } |
| 0 | 472 address code_base() const { return constMethod()->code_base(); } |
| 473 bool contains(address bcp) const { return constMethod()->contains(bcp); } | |
| 474 | |
| 475 // prints byte codes | |
| 476 void print_codes() const { print_codes_on(tty); } | |
| 477 void print_codes_on(outputStream* st) const PRODUCT_RETURN; | |
| 478 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN; | |
| 479 | |
| 480 // checked exceptions | |
| 481 int checked_exceptions_length() const | |
| 482 { return constMethod()->checked_exceptions_length(); } | |
| 483 CheckedExceptionElement* checked_exceptions_start() const | |
| 484 { return constMethod()->checked_exceptions_start(); } | |
| 485 | |
| 486 // localvariable table | |
| 487 bool has_localvariable_table() const | |
| 488 { return constMethod()->has_localvariable_table(); } | |
| 489 int localvariable_table_length() const | |
| 490 { return constMethod()->localvariable_table_length(); } | |
| 491 LocalVariableTableElement* localvariable_table_start() const | |
| 492 { return constMethod()->localvariable_table_start(); } | |
| 493 | |
| 494 bool has_linenumber_table() const | |
| 495 { return constMethod()->has_linenumber_table(); } | |
| 496 u_char* compressed_linenumber_table() const | |
| 497 { return constMethod()->compressed_linenumber_table(); } | |
| 498 | |
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499 // method holder (the Klass* holding this method) |
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500 InstanceKlass* method_holder() const { return constants()->pool_holder(); } |
| 0 | 501 |
| 502 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments) | |
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503 Symbol* klass_name() const; // returns the name of the method holder |
| 0 | 504 BasicType result_type() const; // type of the method result |
| 505 int result_type_index() const; // type index of the method result | |
| 506 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); } | |
| 507 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); } | |
| 508 | |
| 509 // Checked exceptions thrown by this method (resolved to mirrors) | |
| 510 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); } | |
| 511 | |
| 512 // Access flags | |
| 513 bool is_public() const { return access_flags().is_public(); } | |
| 514 bool is_private() const { return access_flags().is_private(); } | |
| 515 bool is_protected() const { return access_flags().is_protected(); } | |
| 516 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } | |
| 517 bool is_static() const { return access_flags().is_static(); } | |
| 518 bool is_final() const { return access_flags().is_final(); } | |
| 519 bool is_synchronized() const { return access_flags().is_synchronized();} | |
| 520 bool is_native() const { return access_flags().is_native(); } | |
| 521 bool is_abstract() const { return access_flags().is_abstract(); } | |
| 522 bool is_strict() const { return access_flags().is_strict(); } | |
| 523 bool is_synthetic() const { return access_flags().is_synthetic(); } | |
| 524 | |
| 525 // returns true if contains only return operation | |
| 526 bool is_empty_method() const; | |
| 527 | |
| 528 // returns true if this is a vanilla constructor | |
| 529 bool is_vanilla_constructor() const; | |
| 530 | |
| 531 // checks method and its method holder | |
| 532 bool is_final_method() const; | |
| 533 bool is_strict_method() const; | |
| 534 | |
| 535 // true if method needs no dynamic dispatch (final and/or no vtable entry) | |
| 536 bool can_be_statically_bound() const; | |
| 537 | |
| 538 // returns true if the method has any backward branches. | |
| 539 bool has_loops() { | |
| 540 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag(); | |
| 541 }; | |
| 542 | |
| 543 bool compute_has_loops_flag(); | |
| 544 | |
| 545 bool has_jsrs() { | |
| 546 return access_flags().has_jsrs(); | |
| 547 }; | |
| 548 void set_has_jsrs() { | |
| 549 _access_flags.set_has_jsrs(); | |
| 550 } | |
| 551 | |
| 552 // returns true if the method has any monitors. | |
| 553 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); } | |
| 554 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); } | |
| 555 | |
| 556 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); } | |
| 557 | |
| 558 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes | |
| 559 // propererly nest in the method. It might return false, even though they actually nest properly, since the info. | |
| 560 // has not been computed yet. | |
| 561 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); } | |
| 562 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); } | |
| 563 | |
| 564 // returns true if the method is an accessor function (setter/getter). | |
| 565 bool is_accessor() const; | |
| 566 | |
| 567 // returns true if the method is an initializer (<init> or <clinit>). | |
| 568 bool is_initializer() const; | |
| 569 | |
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570 // returns true if the method is static OR if the classfile version < 51 |
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571 bool has_valid_initializer_flags() const; |
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572 |
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573 // returns true if the method name is <clinit> and the method has |
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574 // valid static initializer flags. |
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575 bool is_static_initializer() const; |
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576 |
| 0 | 577 // compiled code support |
| 578 // NOTE: code() is inherently racy as deopt can be clearing code | |
| 579 // simultaneously. Use with caution. | |
| 580 bool has_compiled_code() const { return code() != NULL; } | |
| 581 | |
| 582 // sizing | |
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583 static int header_size() { return sizeof(Method)/HeapWordSize; } |
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584 static int size(bool is_native); |
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585 int size() const { return method_size(); } |
| 0 | 586 |
| 587 // interpreter support | |
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588 static ByteSize const_offset() { return byte_offset_of(Method, _constMethod ); } |
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589 static ByteSize access_flags_offset() { return byte_offset_of(Method, _access_flags ); } |
| 0 | 590 #ifdef CC_INTERP |
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591 static ByteSize result_index_offset() { return byte_offset_of(Method, _result_index ); } |
| 0 | 592 #endif /* CC_INTERP */ |
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593 static ByteSize size_of_locals_offset() { return byte_offset_of(Method, _max_locals ); } |
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594 static ByteSize size_of_parameters_offset() { return byte_offset_of(Method, _size_of_parameters); } |
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595 static ByteSize from_compiled_offset() { return byte_offset_of(Method, _from_compiled_entry); } |
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596 static ByteSize code_offset() { return byte_offset_of(Method, _code); } |
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597 static ByteSize invocation_counter_offset() { return byte_offset_of(Method, _invocation_counter); } |
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598 static ByteSize backedge_counter_offset() { return byte_offset_of(Method, _backedge_counter); } |
| 0 | 599 static ByteSize method_data_offset() { |
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600 return byte_offset_of(Method, _method_data); |
| 0 | 601 } |
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602 static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(Method, _interpreter_invocation_count); } |
| 0 | 603 #ifndef PRODUCT |
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604 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(Method, _compiled_invocation_count); } |
| 0 | 605 #endif // not PRODUCT |
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606 static ByteSize native_function_offset() { return in_ByteSize(sizeof(Method)); } |
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607 static ByteSize from_interpreted_offset() { return byte_offset_of(Method, _from_interpreted_entry ); } |
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608 static ByteSize interpreter_entry_offset() { return byte_offset_of(Method, _i2i_entry ); } |
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609 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(Method) + wordSize); } |
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610 static ByteSize max_stack_offset() { return byte_offset_of(Method, _max_stack ); } |
| 0 | 611 |
| 612 // for code generation | |
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613 static int method_data_offset_in_bytes() { return offset_of(Method, _method_data); } |
| 0 | 614 static int interpreter_invocation_counter_offset_in_bytes() |
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615 { return offset_of(Method, _interpreter_invocation_count); } |
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616 static int intrinsic_id_offset_in_bytes() { return offset_of(Method, _intrinsic_id); } |
|
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617 static int intrinsic_id_size_in_bytes() { return sizeof(u1); } |
| 0 | 618 |
| 619 // Static methods that are used to implement member methods where an exposed this pointer | |
| 620 // is needed due to possible GCs | |
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621 static objArrayHandle resolved_checked_exceptions_impl(Method* this_oop, TRAPS); |
| 0 | 622 |
| 623 // Returns the byte code index from the byte code pointer | |
| 624 int bci_from(address bcp) const; | |
| 625 address bcp_from(int bci) const; | |
| 626 int validate_bci_from_bcx(intptr_t bcx) const; | |
| 627 | |
| 628 // Returns the line number for a bci if debugging information for the method is prowided, | |
| 629 // -1 is returned otherwise. | |
| 630 int line_number_from_bci(int bci) const; | |
| 631 | |
| 632 // Reflection support | |
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633 bool is_overridden_in(Klass* k) const; |
| 0 | 634 |
| 710 | 635 // JSR 292 support |
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636 bool is_method_handle_intrinsic() const; // MethodHandles::is_signature_polymorphic_intrinsic(intrinsic_id) |
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637 bool is_compiled_lambda_form() const; // intrinsic_id() == vmIntrinsics::_compiledLambdaForm |
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638 bool has_member_arg() const; // intrinsic_id() == vmIntrinsics::_linkToSpecial, etc. |
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639 static methodHandle make_method_handle_intrinsic(vmIntrinsics::ID iid, // _invokeBasic, _linkToVirtual |
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640 Symbol* signature, //anything at all |
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641 TRAPS); |
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642 static Klass* check_non_bcp_klass(Klass* klass); |
| 710 | 643 // these operate only on invoke methods: |
| 644 // presize interpreter frames for extra interpreter stack entries, if needed | |
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645 // method handles want to be able to push a few extra values (e.g., a bound receiver), and |
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646 // invokedynamic sometimes needs to push a bootstrap method, call site, and arglist, |
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647 // all without checking for a stack overflow |
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648 static int extra_stack_entries() { return EnableInvokeDynamic ? 2 : 0; } |
| 710 | 649 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize() |
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650 |
| 0 | 651 // RedefineClasses() support: |
| 652 bool is_old() const { return access_flags().is_old(); } | |
| 653 void set_is_old() { _access_flags.set_is_old(); } | |
| 654 bool is_obsolete() const { return access_flags().is_obsolete(); } | |
| 655 void set_is_obsolete() { _access_flags.set_is_obsolete(); } | |
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656 bool on_stack() const { return access_flags().on_stack(); } |
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657 void set_on_stack(const bool value); |
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658 |
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659 // see the definition in Method*.cpp for the gory details |
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660 bool should_not_be_cached() const; |
| 0 | 661 |
| 662 // JVMTI Native method prefixing support: | |
| 663 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); } | |
| 664 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); } | |
| 665 | |
| 666 // Rewriting support | |
| 667 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, | |
| 668 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS); | |
| 669 | |
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670 // jmethodID handling |
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671 // Because the useful life-span of a jmethodID cannot be determined, |
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672 // once created they are never reclaimed. The methods to which they refer, |
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673 // however, can be GC'ed away if the class is unloaded or if the method is |
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674 // made obsolete or deleted -- in these cases, the jmethodID |
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675 // refers to NULL (as is the case for any weak reference). |
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676 static jmethodID make_jmethod_id(ClassLoaderData* loader_data, Method* mh); |
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677 static void destroy_jmethod_id(ClassLoaderData* loader_data, jmethodID mid); |
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678 |
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679 // Use resolve_jmethod_id() in situations where the caller is expected |
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680 // to provide a valid jmethodID; the only sanity checks are in asserts; |
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681 // result guaranteed not to be NULL. |
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682 inline static Method* resolve_jmethod_id(jmethodID mid) { |
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683 assert(mid != NULL, "JNI method id should not be null"); |
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684 return *((Method**)mid); |
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685 } |
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686 |
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687 // Use checked_resolve_jmethod_id() in situations where the caller |
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688 // should provide a valid jmethodID, but might not. NULL is returned |
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689 // when the jmethodID does not refer to a valid method. |
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690 static Method* checked_resolve_jmethod_id(jmethodID mid); |
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691 |
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692 static void change_method_associated_with_jmethod_id(jmethodID old_jmid_ptr, Method* new_method); |
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693 static bool is_method_id(jmethodID mid); |
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694 |
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695 // Clear methods |
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696 static void clear_jmethod_ids(ClassLoaderData* loader_data); |
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697 static void print_jmethod_ids(ClassLoaderData* loader_data, outputStream* out) PRODUCT_RETURN; |
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698 |
| 0 | 699 // Get this method's jmethodID -- allocate if it doesn't exist |
| 700 jmethodID jmethod_id() { methodHandle this_h(this); | |
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701 return InstanceKlass::get_jmethod_id(method_holder(), this_h); } |
| 0 | 702 |
| 703 // Lookup the jmethodID for this method. Return NULL if not found. | |
| 704 // NOTE that this function can be called from a signal handler | |
| 705 // (see AsyncGetCallTrace support for Forte Analyzer) and this | |
| 706 // needs to be async-safe. No allocation should be done and | |
| 707 // so handles are not used to avoid deadlock. | |
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708 jmethodID find_jmethod_id_or_null() { return method_holder()->jmethod_id_or_null(this); } |
| 0 | 709 |
| 710 // JNI static invoke cached itable index accessors | |
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711 int cached_itable_index() { return method_holder()->cached_itable_index(method_idnum()); } |
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712 void set_cached_itable_index(int index) { method_holder()->set_cached_itable_index(method_idnum(), index); } |
| 0 | 713 |
| 714 // Support for inlining of intrinsic methods | |
|
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715 vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; } |
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716 void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; } |
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717 |
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718 // Helper routines for intrinsic_id() and vmIntrinsics::method(). |
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719 void init_intrinsic_id(); // updates from _none if a match |
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720 static vmSymbols::SID klass_id_for_intrinsics(Klass* holder); |
| 0 | 721 |
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722 bool jfr_towrite() { return _jfr_towrite; } |
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723 void set_jfr_towrite(bool towrite) { _jfr_towrite = towrite; } |
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724 |
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725 bool force_inline() { return _force_inline; } |
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726 void set_force_inline(bool x) { _force_inline = x; } |
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727 bool dont_inline() { return _dont_inline; } |
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728 void set_dont_inline(bool x) { _dont_inline = x; } |
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729 bool is_hidden() { return _hidden; } |
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730 void set_hidden(bool x) { _hidden = x; } |
| 6934 | 731 ConstMethod::MethodType method_type() const { |
| 732 return _constMethod->method_type(); | |
| 733 } | |
| 734 bool is_overpass() const { return method_type() == ConstMethod::OVERPASS; } | |
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735 |
| 0 | 736 // On-stack replacement support |
| 1783 | 737 bool has_osr_nmethod(int level, bool match_level) { |
|
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738 return method_holder()->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL; |
| 1783 | 739 } |
| 740 | |
| 741 nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) { | |
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742 return method_holder()->lookup_osr_nmethod(this, bci, level, match_level); |
| 1783 | 743 } |
| 0 | 744 |
| 745 // Inline cache support | |
| 746 void cleanup_inline_caches(); | |
| 747 | |
| 748 // Find if klass for method is loaded | |
| 749 bool is_klass_loaded_by_klass_index(int klass_index) const; | |
| 750 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const; | |
| 751 | |
| 752 // Indicates whether compilation failed earlier for this method, or | |
| 753 // whether it is not compilable for another reason like having a | |
| 754 // breakpoint set in it. | |
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755 bool is_not_compilable(int comp_level = CompLevel_any) const; |
| 1783 | 756 void set_not_compilable(int comp_level = CompLevel_all, bool report = true); |
| 757 void set_not_compilable_quietly(int comp_level = CompLevel_all) { | |
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758 set_not_compilable(comp_level, false); |
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759 } |
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760 bool is_not_osr_compilable(int comp_level = CompLevel_any) const; |
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761 void set_not_osr_compilable(int comp_level = CompLevel_all, bool report = true); |
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762 void set_not_osr_compilable_quietly(int comp_level = CompLevel_all) { |
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763 set_not_osr_compilable(comp_level, false); |
| 1783 | 764 } |
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765 |
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766 private: |
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767 void print_made_not_compilable(int comp_level, bool is_osr, bool report); |
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768 |
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769 public: |
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770 bool is_not_c1_compilable() const { return access_flags().is_not_c1_compilable(); } |
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771 void set_not_c1_compilable() { _access_flags.set_not_c1_compilable(); } |
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772 bool is_not_c2_compilable() const { return access_flags().is_not_c2_compilable(); } |
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773 void set_not_c2_compilable() { _access_flags.set_not_c2_compilable(); } |
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774 |
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775 bool is_not_c1_osr_compilable() const { return is_not_c1_compilable(); } // don't waste an accessFlags bit |
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776 void set_not_c1_osr_compilable() { set_not_c1_compilable(); } // don't waste an accessFlags bit |
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777 bool is_not_c2_osr_compilable() const { return access_flags().is_not_c2_osr_compilable(); } |
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778 void set_not_c2_osr_compilable() { _access_flags.set_not_c2_osr_compilable(); } |
| 0 | 779 |
| 780 // Background compilation support | |
| 1783 | 781 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); } |
| 782 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); } | |
| 783 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); } | |
| 0 | 784 |
| 785 // Resolve all classes in signature, return 'true' if successful | |
| 786 static bool load_signature_classes(methodHandle m, TRAPS); | |
| 787 | |
| 788 // Return if true if not all classes references in signature, including return type, has been loaded | |
| 789 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS); | |
| 790 | |
| 791 // Printing | |
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792 void print_short_name(outputStream* st = tty) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM |
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793 void print_name(outputStream* st = tty) PRODUCT_RETURN; // prints as "virtual void foo(int)" |
| 0 | 794 |
| 795 // Helper routine used for method sorting | |
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796 static void sort_methods(Array<Method*>* methods, |
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797 Array<AnnotationArray*>* methods_annotations, |
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798 Array<AnnotationArray*>* methods_parameter_annotations, |
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799 Array<AnnotationArray*>* methods_default_annotations, |
| 0 | 800 bool idempotent = false); |
| 801 | |
| 802 // size of parameters | |
| 803 void set_size_of_parameters(int size) { _size_of_parameters = size; } | |
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804 |
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805 // Deallocation function for redefine classes or if an error occurs |
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806 void deallocate_contents(ClassLoaderData* loader_data); |
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807 |
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808 // Printing |
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809 #ifndef PRODUCT |
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810 void print_on(outputStream* st) const; |
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811 #endif |
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812 void print_value_on(outputStream* st) const; |
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813 |
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814 const char* internal_name() const { return "{method}"; } |
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815 |
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816 // Check for valid method pointer |
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817 bool is_valid_method() const; |
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818 |
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819 // Verify |
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820 void verify() { verify_on(tty); } |
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821 void verify_on(outputStream* st); |
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822 |
| 0 | 823 private: |
| 824 | |
| 825 // Inlined elements | |
| 826 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); } | |
| 827 address* signature_handler_addr() const { return native_function_addr() + 1; } | |
| 828 }; | |
| 829 | |
| 830 | |
| 831 // Utility class for compressing line number tables | |
| 832 | |
| 833 class CompressedLineNumberWriteStream: public CompressedWriteStream { | |
| 834 private: | |
| 835 int _bci; | |
| 836 int _line; | |
| 837 public: | |
| 838 // Constructor | |
| 839 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {} | |
| 840 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {} | |
| 841 | |
| 842 // Write (bci, line number) pair to stream | |
| 843 void write_pair_regular(int bci_delta, int line_delta); | |
| 844 | |
| 845 inline void write_pair_inline(int bci, int line) { | |
| 846 int bci_delta = bci - _bci; | |
| 847 int line_delta = line - _line; | |
| 848 _bci = bci; | |
| 849 _line = line; | |
| 850 // Skip (0,0) deltas - they do not add information and conflict with terminator. | |
| 851 if (bci_delta == 0 && line_delta == 0) return; | |
| 852 // Check if bci is 5-bit and line number 3-bit unsigned. | |
| 853 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) { | |
| 854 // Compress into single byte. | |
| 855 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta; | |
| 856 // Check that value doesn't match escape character. | |
| 857 if (value != 0xFF) { | |
| 858 write_byte(value); | |
| 859 return; | |
| 860 } | |
| 861 } | |
| 862 write_pair_regular(bci_delta, line_delta); | |
| 863 } | |
| 864 | |
| 865 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair. | |
| 866 // Disabling optimization doesn't work for methods in header files | |
| 867 // so we force it to call through the non-optimized version in the .cpp. | |
| 868 // It's gross, but it's the only way we can ensure that all callers are | |
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869 // fixed. _MSC_VER is defined by the windows compiler |
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870 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
| 0 | 871 void write_pair(int bci, int line); |
| 872 #else | |
| 873 void write_pair(int bci, int line) { write_pair_inline(bci, line); } | |
| 874 #endif | |
| 875 | |
| 876 // Write end-of-stream marker | |
| 877 void write_terminator() { write_byte(0); } | |
| 878 }; | |
| 879 | |
| 880 | |
| 881 // Utility class for decompressing line number tables | |
| 882 | |
| 883 class CompressedLineNumberReadStream: public CompressedReadStream { | |
| 884 private: | |
| 885 int _bci; | |
| 886 int _line; | |
| 887 public: | |
| 888 // Constructor | |
| 889 CompressedLineNumberReadStream(u_char* buffer); | |
| 890 // Read (bci, line number) pair from stream. Returns false at end-of-stream. | |
| 891 bool read_pair(); | |
| 892 // Accessing bci and line number (after calling read_pair) | |
| 893 int bci() const { return _bci; } | |
| 894 int line() const { return _line; } | |
| 895 }; | |
| 896 | |
| 897 | |
| 898 /// Fast Breakpoints. | |
| 899 | |
| 900 // If this structure gets more complicated (because bpts get numerous), | |
| 901 // move it into its own header. | |
| 902 | |
| 903 // There is presently no provision for concurrent access | |
| 904 // to breakpoint lists, which is only OK for JVMTI because | |
| 905 // breakpoints are written only at safepoints, and are read | |
| 906 // concurrently only outside of safepoints. | |
| 907 | |
| 6197 | 908 class BreakpointInfo : public CHeapObj<mtClass> { |
| 0 | 909 friend class VMStructs; |
| 910 private: | |
| 911 Bytecodes::Code _orig_bytecode; | |
| 912 int _bci; | |
| 913 u2 _name_index; // of method | |
| 914 u2 _signature_index; // of method | |
| 915 BreakpointInfo* _next; // simple storage allocation | |
| 916 | |
| 917 public: | |
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918 BreakpointInfo(Method* m, int bci); |
| 0 | 919 |
| 920 // accessors | |
| 921 Bytecodes::Code orig_bytecode() { return _orig_bytecode; } | |
| 922 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; } | |
| 923 int bci() { return _bci; } | |
| 924 | |
| 925 BreakpointInfo* next() const { return _next; } | |
| 926 void set_next(BreakpointInfo* n) { _next = n; } | |
| 927 | |
| 928 // helps for searchers | |
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929 bool match(const Method* m, int bci) { |
| 0 | 930 return bci == _bci && match(m); |
| 931 } | |
| 932 | |
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933 bool match(const Method* m) { |
| 0 | 934 return _name_index == m->name_index() && |
| 935 _signature_index == m->signature_index(); | |
| 936 } | |
| 937 | |
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938 void set(Method* method); |
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939 void clear(Method* method); |
| 0 | 940 }; |
| 1972 | 941 |
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942 // Utility class for access exception handlers |
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943 class ExceptionTable : public StackObj { |
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944 private: |
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945 ExceptionTableElement* _table; |
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946 u2 _length; |
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947 |
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948 public: |
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949 ExceptionTable(Method* m) { |
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950 if (m->has_exception_handler()) { |
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951 _table = m->exception_table_start(); |
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952 _length = m->exception_table_length(); |
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953 } else { |
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954 _table = NULL; |
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955 _length = 0; |
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956 } |
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957 } |
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958 |
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959 int length() const { |
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960 return _length; |
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961 } |
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962 |
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963 u2 start_pc(int idx) const { |
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964 assert(idx < _length, "out of bounds"); |
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965 return _table[idx].start_pc; |
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966 } |
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967 |
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968 void set_start_pc(int idx, u2 value) { |
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969 assert(idx < _length, "out of bounds"); |
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970 _table[idx].start_pc = value; |
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971 } |
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972 |
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973 u2 end_pc(int idx) const { |
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974 assert(idx < _length, "out of bounds"); |
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975 return _table[idx].end_pc; |
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976 } |
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977 |
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978 void set_end_pc(int idx, u2 value) { |
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979 assert(idx < _length, "out of bounds"); |
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980 _table[idx].end_pc = value; |
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981 } |
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982 |
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983 u2 handler_pc(int idx) const { |
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984 assert(idx < _length, "out of bounds"); |
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985 return _table[idx].handler_pc; |
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986 } |
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987 |
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988 void set_handler_pc(int idx, u2 value) { |
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989 assert(idx < _length, "out of bounds"); |
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990 _table[idx].handler_pc = value; |
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991 } |
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992 |
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993 u2 catch_type_index(int idx) const { |
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994 assert(idx < _length, "out of bounds"); |
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995 return _table[idx].catch_type_index; |
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996 } |
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997 |
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998 void set_catch_type_index(int idx, u2 value) { |
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999 assert(idx < _length, "out of bounds"); |
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1000 _table[idx].catch_type_index = value; |
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1001 } |
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1002 }; |
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1003 |
| 1972 | 1004 #endif // SHARE_VM_OOPS_METHODOOP_HPP |