Mercurial > hg > truffle
annotate src/share/vm/oops/method.hpp @ 12355:cefad50507d8
Merge with hs25-b53
| author | Gilles Duboscq <duboscq@ssw.jku.at> |
|---|---|
| date | Fri, 11 Oct 2013 10:38:03 +0200 |
| parents | 836a62f43af9 b2e698d2276c |
| children | 359f7e70ae7f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 7956 | 2 * Copyright (c) 1997, 2013, 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" |
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34 #include "oops/methodCounters.hpp" |
| 1972 | 35 #include "oops/instanceKlass.hpp" |
| 36 #include "oops/oop.hpp" | |
| 37 #include "oops/typeArrayOop.hpp" | |
| 38 #include "utilities/accessFlags.hpp" | |
| 39 #include "utilities/growableArray.hpp" | |
| 40 | |
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41 // A Method* represents a Java method. |
| 0 | 42 // |
| 43 // Memory layout (each line represents a word). Note that most applications load thousands of methods, | |
| 44 // so keeping the size of this structure small has a big impact on footprint. | |
| 45 // | |
| 46 // We put all oops and method_size first for better gc cache locality. | |
| 47 // | |
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48 // The actual bytecodes are inlined after the end of the Method struct. |
| 0 | 49 // |
| 50 // There are bits in the access_flags telling whether inlined tables are present. | |
| 51 // Note that accessing the line number and local variable tables is not performance critical at all. | |
| 52 // Accessing the checked exceptions table is used by reflection, so we put that last to make access | |
| 53 // to it fast. | |
| 54 // | |
| 55 // The line number table is compressed and inlined following the byte codes. It is found as the first | |
| 56 // byte following the byte codes. The checked exceptions table and the local variable table are inlined | |
| 57 // after the line number table, and indexed from the end of the method. We do not compress the checked | |
| 58 // exceptions table since the average length is less than 2, and do not bother to compress the local | |
| 59 // variable table either since it is mostly absent. | |
| 60 // | |
| 61 // Note that native_function and signature_handler has to be at fixed offsets (required by the interpreter) | |
| 62 // | |
| 63 // |------------------------------------------------------| | |
| 64 // | header | | |
| 65 // | klass | | |
| 66 // |------------------------------------------------------| | |
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67 // | ConstMethod* (oop) | |
| 0 | 68 // |------------------------------------------------------| |
| 69 // | methodData (oop) | | |
| 10233 | 70 // | methodCounters | |
| 0 | 71 // |------------------------------------------------------| |
| 72 // | access_flags | | |
| 73 // | vtable_index | | |
| 74 // |------------------------------------------------------| | |
| 75 // | result_index (C++ interpreter only) | | |
| 76 // |------------------------------------------------------| | |
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77 // | method_size | intrinsic_id| flags | |
| 0 | 78 // |------------------------------------------------------| |
| 79 // | code (pointer) | | |
| 80 // | i2i (pointer) | | |
| 81 // | adapter (pointer) | | |
| 82 // | from_compiled_entry (pointer) | | |
| 83 // | from_interpreted_entry (pointer) | | |
| 84 // |------------------------------------------------------| | |
| 85 // | native_function (present only if native) | | |
| 86 // | signature_handler (present only if native) | | |
| 87 // |------------------------------------------------------| | |
| 88 | |
| 89 | |
| 90 class CheckedExceptionElement; | |
| 91 class LocalVariableTableElement; | |
| 92 class AdapterHandlerEntry; | |
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93 class MethodData; |
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94 class MethodCounters; |
| 6934 | 95 class ConstMethod; |
| 8031 | 96 class InlineTableSizes; |
| 7956 | 97 class KlassSizeStats; |
| 0 | 98 |
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99 class Method : public Metadata { |
| 0 | 100 friend class VMStructs; |
| 101 private: | |
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102 ConstMethod* _constMethod; // Method read-only data. |
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103 MethodData* _method_data; |
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104 MethodCounters* _method_counters; |
| 0 | 105 AccessFlags _access_flags; // Access flags |
| 106 int _vtable_index; // vtable index of this method (see VtableIndexFlag) | |
| 107 // note: can have vtables with >2**16 elements (because of inheritance) | |
| 108 #ifdef CC_INTERP | |
| 109 int _result_index; // C++ interpreter needs for converting results to/from stack | |
| 110 #endif | |
| 111 u2 _method_size; // size of this object | |
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112 u1 _intrinsic_id; // vmSymbols::intrinsic_id (0 == _none) |
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113 u1 _jfr_towrite : 1, // Flags |
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114 _caller_sensitive : 1, |
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115 _force_inline : 1, |
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116 _hidden : 1, |
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117 _dont_inline : 1, |
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118 : 3; |
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119 |
| 0 | 120 #ifndef PRODUCT |
| 121 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging) | |
| 122 #endif | |
| 123 // Entry point for calling both from and to the interpreter. | |
| 124 address _i2i_entry; // All-args-on-stack calling convention | |
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125 // Adapter blob (i2c/c2i) for this Method*. Set once when method is linked. |
| 0 | 126 AdapterHandlerEntry* _adapter; |
| 127 // Entry point for calling from compiled code, to compiled code if it exists | |
| 128 // or else the interpreter. | |
| 129 volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry() | |
| 130 // The entry point for calling both from and to compiled code is | |
| 131 // "_code->entry_point()". Because of tiered compilation and de-opt, this | |
| 132 // field can come and go. It can transition from NULL to not-null at any | |
| 133 // time (whenever a compile completes). It can transition from not-null to | |
| 134 // NULL only at safepoints (because of a de-opt). | |
| 135 nmethod* volatile _code; // Points to the corresponding piece of native code | |
| 136 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry | |
| 137 | |
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138 // Constructor |
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139 Method(ConstMethod* xconst, AccessFlags access_flags, int size); |
| 0 | 140 public: |
| 6934 | 141 |
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142 static Method* allocate(ClassLoaderData* loader_data, |
| 6934 | 143 int byte_code_size, |
| 144 AccessFlags access_flags, | |
| 8031 | 145 InlineTableSizes* sizes, |
| 6934 | 146 ConstMethod::MethodType method_type, |
| 147 TRAPS); | |
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148 |
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149 // CDS and vtbl checking can create an empty Method to get vtbl pointer. |
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150 Method(){} |
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151 |
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152 // The Method vtable is restored by this call when the Method is in the |
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153 // shared archive. See patch_klass_vtables() in metaspaceShared.cpp for |
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154 // all the gory details. SA, dtrace and pstack helpers distinguish metadata |
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155 // by their vtable. |
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156 void restore_vtable() { guarantee(is_method(), "vtable restored by this call"); } |
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157 bool is_method() const volatile { return true; } |
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158 |
| 0 | 159 // accessors for instance variables |
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160 |
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161 ConstMethod* constMethod() const { return _constMethod; } |
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162 void set_constMethod(ConstMethod* xconst) { _constMethod = xconst; } |
| 0 | 163 |
| 164 | |
| 165 static address make_adapters(methodHandle mh, TRAPS); | |
| 166 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); } | |
| 167 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); } | |
| 168 | |
| 169 // access flag | |
| 170 AccessFlags access_flags() const { return _access_flags; } | |
| 171 void set_access_flags(AccessFlags flags) { _access_flags = flags; } | |
| 172 | |
| 173 // name | |
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174 Symbol* name() const { return constants()->symbol_at(name_index()); } |
| 0 | 175 int name_index() const { return constMethod()->name_index(); } |
| 176 void set_name_index(int index) { constMethod()->set_name_index(index); } | |
| 177 | |
| 178 // signature | |
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179 Symbol* signature() const { return constants()->symbol_at(signature_index()); } |
| 0 | 180 int signature_index() const { return constMethod()->signature_index(); } |
| 181 void set_signature_index(int index) { constMethod()->set_signature_index(index); } | |
| 182 | |
| 183 // generics support | |
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184 Symbol* generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? constants()->symbol_at(idx) : (Symbol*)NULL); } |
| 0 | 185 int generic_signature_index() const { return constMethod()->generic_signature_index(); } |
| 186 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); } | |
| 187 | |
| 188 // annotations support | |
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189 AnnotationArray* annotations() const { |
| 8031 | 190 return constMethod()->method_annotations(); |
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191 } |
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192 AnnotationArray* parameter_annotations() const { |
| 8031 | 193 return constMethod()->parameter_annotations(); |
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194 } |
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195 AnnotationArray* annotation_default() const { |
| 8031 | 196 return constMethod()->default_annotations(); |
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197 } |
| 8031 | 198 AnnotationArray* type_annotations() const { |
| 199 return constMethod()->type_annotations(); | |
| 200 } | |
| 0 | 201 |
| 202 #ifdef CC_INTERP | |
| 203 void set_result_index(BasicType type); | |
| 204 int result_index() { return _result_index; } | |
| 205 #endif | |
| 206 | |
| 207 // Helper routine: get klass name + "." + method name + signature as | |
| 208 // C string, for the purpose of providing more useful NoSuchMethodErrors | |
| 209 // and fatal error handling. The string is allocated in resource | |
| 210 // area if a buffer is not provided by the caller. | |
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211 char* name_and_sig_as_C_string() const; |
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212 char* name_and_sig_as_C_string(char* buf, int size) const; |
| 0 | 213 |
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214 // Static routine in the situations we don't have a Method* |
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215 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature); |
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216 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size); |
| 0 | 217 |
| 2142 | 218 Bytecodes::Code java_code_at(int bci) const { |
| 219 return Bytecodes::java_code_at(this, bcp_from(bci)); | |
| 220 } | |
| 221 Bytecodes::Code code_at(int bci) const { | |
| 222 return Bytecodes::code_at(this, bcp_from(bci)); | |
| 223 } | |
| 224 | |
| 0 | 225 // JVMTI breakpoints |
| 2142 | 226 Bytecodes::Code orig_bytecode_at(int bci) const; |
| 0 | 227 void set_orig_bytecode_at(int bci, Bytecodes::Code code); |
| 228 void set_breakpoint(int bci); | |
| 229 void clear_breakpoint(int bci); | |
| 230 void clear_all_breakpoints(); | |
| 231 // Tracking number of breakpoints, for fullspeed debugging. | |
| 232 // Only mutated by VM thread. | |
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233 u2 number_of_breakpoints() const { |
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234 if (method_counters() == NULL) { |
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235 return 0; |
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236 } else { |
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237 return method_counters()->number_of_breakpoints(); |
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238 } |
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239 } |
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240 void incr_number_of_breakpoints(TRAPS) { |
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241 MethodCounters* mcs = get_method_counters(CHECK); |
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242 if (mcs != NULL) { |
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243 mcs->incr_number_of_breakpoints(); |
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244 } |
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245 } |
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246 void decr_number_of_breakpoints(TRAPS) { |
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247 MethodCounters* mcs = get_method_counters(CHECK); |
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248 if (mcs != NULL) { |
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249 mcs->decr_number_of_breakpoints(); |
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250 } |
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251 } |
| 0 | 252 // Initialization only |
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253 void clear_number_of_breakpoints() { |
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254 if (method_counters() != NULL) { |
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255 method_counters()->clear_number_of_breakpoints(); |
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256 } |
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257 } |
| 0 | 258 |
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259 // index into InstanceKlass methods() array |
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260 // note: also used by jfr |
| 0 | 261 u2 method_idnum() const { return constMethod()->method_idnum(); } |
| 262 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); } | |
| 263 | |
| 264 // code size | |
| 265 int code_size() const { return constMethod()->code_size(); } | |
| 266 | |
| 267 // method size | |
| 268 int method_size() const { return _method_size; } | |
| 269 void set_method_size(int size) { | |
| 270 assert(0 <= size && size < (1 << 16), "invalid method size"); | |
| 271 _method_size = size; | |
| 272 } | |
| 273 | |
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274 // constant pool for Klass* holding this method |
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275 ConstantPool* constants() const { return constMethod()->constants(); } |
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276 void set_constants(ConstantPool* c) { constMethod()->set_constants(c); } |
| 0 | 277 |
| 278 // max stack | |
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279 // return original max stack size for method verification |
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280 int verifier_max_stack() const { return constMethod()->max_stack(); } |
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281 int max_stack() const { return constMethod()->max_stack() + extra_stack_entries(); } |
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282 void set_max_stack(int size) { constMethod()->set_max_stack(size); } |
| 0 | 283 |
| 284 // max locals | |
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285 int max_locals() const { return constMethod()->max_locals(); } |
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286 void set_max_locals(int size) { constMethod()->set_max_locals(size); } |
| 1783 | 287 |
| 288 int highest_comp_level() const; | |
| 289 void set_highest_comp_level(int level); | |
| 290 int highest_osr_comp_level() const; | |
| 291 void set_highest_osr_comp_level(int level); | |
| 0 | 292 |
| 293 // Count of times method was exited via exception while interpreting | |
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294 void interpreter_throwout_increment(TRAPS) { |
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295 MethodCounters* mcs = get_method_counters(CHECK); |
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296 if (mcs != NULL) { |
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297 mcs->interpreter_throwout_increment(); |
| 0 | 298 } |
| 299 } | |
| 300 | |
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301 int interpreter_throwout_count() const { |
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302 if (method_counters() == NULL) { |
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303 return 0; |
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304 } else { |
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305 return method_counters()->interpreter_throwout_count(); |
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306 } |
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307 } |
| 0 | 308 |
| 309 // size of parameters | |
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310 int size_of_parameters() const { return constMethod()->size_of_parameters(); } |
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311 void set_size_of_parameters(int size) { constMethod()->set_size_of_parameters(size); } |
| 0 | 312 |
| 313 bool has_stackmap_table() const { | |
| 314 return constMethod()->has_stackmap_table(); | |
| 315 } | |
| 316 | |
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317 Array<u1>* stackmap_data() const { |
| 0 | 318 return constMethod()->stackmap_data(); |
| 319 } | |
| 320 | |
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321 void set_stackmap_data(Array<u1>* sd) { |
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322 constMethod()->set_stackmap_data(sd); |
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323 } |
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324 |
| 0 | 325 // exception handler table |
| 326 bool has_exception_handler() const | |
| 327 { return constMethod()->has_exception_handler(); } | |
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328 int exception_table_length() const |
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329 { return constMethod()->exception_table_length(); } |
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330 ExceptionTableElement* exception_table_start() const |
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331 { return constMethod()->exception_table_start(); } |
| 0 | 332 |
| 333 // Finds the first entry point bci of an exception handler for an | |
| 334 // exception of klass ex_klass thrown at throw_bci. A value of NULL | |
| 335 // for ex_klass indicates that the exception klass is not known; in | |
| 336 // this case it matches any constraint class. Returns -1 if the | |
| 337 // exception cannot be handled in this method. The handler | |
| 338 // constraint classes are loaded if necessary. Note that this may | |
| 339 // throw an exception if loading of the constraint classes causes | |
| 340 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError. | |
| 341 // If an exception is thrown, returns the bci of the | |
| 342 // exception handler which caused the exception to be thrown, which | |
| 343 // is needed for proper retries. See, for example, | |
| 344 // InterpreterRuntime::exception_handler_for_exception. | |
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345 static int fast_exception_handler_bci_for(methodHandle mh, KlassHandle ex_klass, int throw_bci, TRAPS); |
| 0 | 346 |
| 347 // method data access | |
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348 MethodData* method_data() const { |
| 0 | 349 return _method_data; |
| 350 } | |
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351 |
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352 void set_method_data(MethodData* data) { |
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353 _method_data = data; |
| 0 | 354 } |
| 355 | |
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356 MethodCounters* method_counters() const { |
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357 return _method_counters; |
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358 } |
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359 |
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360 |
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361 void set_method_counters(MethodCounters* counters) { |
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362 _method_counters = counters; |
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363 } |
| 1783 | 364 |
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365 #ifdef TIERED |
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366 // We are reusing interpreter_invocation_count as a holder for the previous event count! |
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367 // We can do that since interpreter_invocation_count is not used in tiered. |
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368 int prev_event_count() const { |
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369 if (method_counters() == NULL) { |
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370 return 0; |
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371 } else { |
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372 return method_counters()->interpreter_invocation_count(); |
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373 } |
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374 } |
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375 void set_prev_event_count(int count, TRAPS) { |
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376 MethodCounters* mcs = get_method_counters(CHECK); |
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377 if (mcs != NULL) { |
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378 mcs->set_interpreter_invocation_count(count); |
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379 } |
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380 } |
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381 jlong prev_time() const { |
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382 return method_counters() == NULL ? 0 : method_counters()->prev_time(); |
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383 } |
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384 void set_prev_time(jlong time, TRAPS) { |
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385 MethodCounters* mcs = get_method_counters(CHECK); |
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386 if (mcs != NULL) { |
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387 mcs->set_prev_time(time); |
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388 } |
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389 } |
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390 float rate() const { |
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391 return method_counters() == NULL ? 0 : method_counters()->rate(); |
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392 } |
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393 void set_rate(float rate, TRAPS) { |
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394 MethodCounters* mcs = get_method_counters(CHECK); |
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395 if (mcs != NULL) { |
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396 mcs->set_rate(rate); |
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397 } |
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398 } |
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399 #endif |
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400 |
| 1783 | 401 int invocation_count(); |
| 402 int backedge_count(); | |
| 403 | |
| 404 bool was_executed_more_than(int n); | |
| 405 bool was_never_executed() { return !was_executed_more_than(0); } | |
| 0 | 406 |
| 407 static void build_interpreter_method_data(methodHandle method, TRAPS); | |
| 408 | |
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409 static MethodCounters* build_method_counters(Method* m, TRAPS); |
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410 |
| 1783 | 411 int interpreter_invocation_count() { |
| 412 if (TieredCompilation) return invocation_count(); | |
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413 else return (method_counters() == NULL) ? 0 : |
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414 method_counters()->interpreter_invocation_count(); |
| 1783 | 415 } |
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416 int increment_interpreter_invocation_count(TRAPS) { |
| 1783 | 417 if (TieredCompilation) ShouldNotReachHere(); |
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418 MethodCounters* mcs = get_method_counters(CHECK_0); |
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419 return (mcs == NULL) ? 0 : mcs->increment_interpreter_invocation_count(); |
| 1783 | 420 } |
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421 |
| 0 | 422 #ifndef PRODUCT |
| 1783 | 423 int compiled_invocation_count() const { return _compiled_invocation_count; } |
| 0 | 424 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; } |
| 425 #endif // not PRODUCT | |
| 426 | |
| 605 | 427 // Clear (non-shared space) pointers which could not be relevant |
| 0 | 428 // if this (shared) method were mapped into another JVM. |
| 429 void remove_unshareable_info(); | |
| 430 | |
| 431 // nmethod/verified compiler entry | |
| 432 address verified_code_entry(); | |
| 433 bool check_code() const; // Not inline to avoid circular ref | |
| 434 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); } | |
| 435 void clear_code(); // Clear out any compiled code | |
| 1202 | 436 static void set_code(methodHandle mh, nmethod* code); |
| 0 | 437 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; } |
| 438 address get_i2c_entry(); | |
| 439 address get_c2i_entry(); | |
| 440 address get_c2i_unverified_entry(); | |
| 441 AdapterHandlerEntry* adapter() { return _adapter; } | |
| 442 // setup entry points | |
| 443 void link_method(methodHandle method, TRAPS); | |
| 444 // clear entry points. Used by sharing code | |
| 445 void unlink_method(); | |
| 446 | |
| 447 // vtable index | |
| 448 enum VtableIndexFlag { | |
| 449 // Valid vtable indexes are non-negative (>= 0). | |
| 450 // These few negative values are used as sentinels. | |
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451 itable_index_max = -10, // first itable index, growing downward |
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452 pending_itable_index = -9, // itable index will be assigned |
| 0 | 453 invalid_vtable_index = -4, // distinct from any valid vtable index |
| 454 garbage_vtable_index = -3, // not yet linked; no vtable layout yet | |
| 455 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch | |
| 456 // 6330203 Note: Do not use -1, which was overloaded with many meanings. | |
| 457 }; | |
| 458 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; }) | |
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459 bool has_vtable_index() const { return _vtable_index >= 0; } |
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460 int vtable_index() const { return _vtable_index; } |
| 0 | 461 void set_vtable_index(int index) { _vtable_index = index; } |
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462 DEBUG_ONLY(bool valid_itable_index() const { return _vtable_index <= pending_itable_index; }) |
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463 bool has_itable_index() const { return _vtable_index <= itable_index_max; } |
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464 int itable_index() const { assert(valid_itable_index(), ""); |
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465 return itable_index_max - _vtable_index; } |
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466 void set_itable_index(int index) { _vtable_index = itable_index_max - index; assert(valid_itable_index(), ""); } |
| 0 | 467 |
| 468 // interpreter entry | |
| 469 address interpreter_entry() const { return _i2i_entry; } | |
| 470 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry | |
| 471 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; } | |
| 472 | |
| 473 // native function (used for native methods only) | |
| 474 enum { | |
| 475 native_bind_event_is_interesting = true | |
| 476 }; | |
| 477 address native_function() const { return *(native_function_addr()); } | |
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478 address critical_native_function(); |
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479 |
| 0 | 480 // Must specify a real function (not NULL). |
| 481 // Use clear_native_function() to unregister. | |
| 482 void set_native_function(address function, bool post_event_flag); | |
| 483 bool has_native_function() const; | |
| 484 void clear_native_function(); | |
| 485 | |
| 486 // signature handler (used for native methods only) | |
| 487 address signature_handler() const { return *(signature_handler_addr()); } | |
| 488 void set_signature_handler(address handler); | |
| 489 | |
| 490 // Interpreter oopmap support | |
| 491 void mask_for(int bci, InterpreterOopMap* mask); | |
| 492 | |
| 493 #ifndef PRODUCT | |
| 494 // operations on invocation counter | |
| 1783 | 495 void print_invocation_count(); |
| 0 | 496 #endif |
| 497 | |
| 498 // byte codes | |
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499 void set_code(address code) { return constMethod()->set_code(code); } |
| 0 | 500 address code_base() const { return constMethod()->code_base(); } |
| 501 bool contains(address bcp) const { return constMethod()->contains(bcp); } | |
| 502 | |
| 503 // prints byte codes | |
| 504 void print_codes() const { print_codes_on(tty); } | |
| 505 void print_codes_on(outputStream* st) const PRODUCT_RETURN; | |
| 506 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN; | |
| 507 | |
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508 // method parameters |
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509 bool has_method_parameters() const |
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510 { return constMethod()->has_method_parameters(); } |
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511 int method_parameters_length() const |
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512 { return constMethod()->method_parameters_length(); } |
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513 MethodParametersElement* method_parameters_start() const |
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514 { return constMethod()->method_parameters_start(); } |
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515 |
| 0 | 516 // checked exceptions |
| 517 int checked_exceptions_length() const | |
| 518 { return constMethod()->checked_exceptions_length(); } | |
| 519 CheckedExceptionElement* checked_exceptions_start() const | |
| 520 { return constMethod()->checked_exceptions_start(); } | |
| 521 | |
| 522 // localvariable table | |
| 523 bool has_localvariable_table() const | |
| 524 { return constMethod()->has_localvariable_table(); } | |
| 525 int localvariable_table_length() const | |
| 526 { return constMethod()->localvariable_table_length(); } | |
| 527 LocalVariableTableElement* localvariable_table_start() const | |
| 528 { return constMethod()->localvariable_table_start(); } | |
| 529 | |
| 530 bool has_linenumber_table() const | |
| 531 { return constMethod()->has_linenumber_table(); } | |
| 532 u_char* compressed_linenumber_table() const | |
| 533 { return constMethod()->compressed_linenumber_table(); } | |
| 534 | |
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535 // method holder (the Klass* holding this method) |
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536 InstanceKlass* method_holder() const { return constants()->pool_holder(); } |
| 0 | 537 |
| 538 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments) | |
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539 Symbol* klass_name() const; // returns the name of the method holder |
| 0 | 540 BasicType result_type() const; // type of the method result |
| 541 int result_type_index() const; // type index of the method result | |
| 542 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); } | |
| 543 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); } | |
| 544 | |
| 545 // Checked exceptions thrown by this method (resolved to mirrors) | |
| 546 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); } | |
| 547 | |
| 548 // Access flags | |
| 549 bool is_public() const { return access_flags().is_public(); } | |
| 550 bool is_private() const { return access_flags().is_private(); } | |
| 551 bool is_protected() const { return access_flags().is_protected(); } | |
| 552 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } | |
| 553 bool is_static() const { return access_flags().is_static(); } | |
| 554 bool is_final() const { return access_flags().is_final(); } | |
| 555 bool is_synchronized() const { return access_flags().is_synchronized();} | |
| 556 bool is_native() const { return access_flags().is_native(); } | |
| 557 bool is_abstract() const { return access_flags().is_abstract(); } | |
| 558 bool is_strict() const { return access_flags().is_strict(); } | |
| 559 bool is_synthetic() const { return access_flags().is_synthetic(); } | |
| 560 | |
| 561 // returns true if contains only return operation | |
| 562 bool is_empty_method() const; | |
| 563 | |
| 564 // returns true if this is a vanilla constructor | |
| 565 bool is_vanilla_constructor() const; | |
| 566 | |
| 567 // checks method and its method holder | |
| 568 bool is_final_method() const; | |
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569 bool is_final_method(AccessFlags class_access_flags) const; |
| 0 | 570 |
| 571 // true if method needs no dynamic dispatch (final and/or no vtable entry) | |
| 572 bool can_be_statically_bound() const; | |
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573 bool can_be_statically_bound(AccessFlags class_access_flags) const; |
| 0 | 574 |
| 575 // returns true if the method has any backward branches. | |
| 576 bool has_loops() { | |
| 577 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag(); | |
| 578 }; | |
| 579 | |
| 580 bool compute_has_loops_flag(); | |
| 581 | |
| 582 bool has_jsrs() { | |
| 583 return access_flags().has_jsrs(); | |
| 584 }; | |
| 585 void set_has_jsrs() { | |
| 586 _access_flags.set_has_jsrs(); | |
| 587 } | |
| 588 | |
| 589 // returns true if the method has any monitors. | |
| 590 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); } | |
| 591 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); } | |
| 592 | |
| 593 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); } | |
| 594 | |
| 595 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes | |
| 596 // propererly nest in the method. It might return false, even though they actually nest properly, since the info. | |
| 597 // has not been computed yet. | |
| 598 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); } | |
| 599 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); } | |
| 600 | |
| 601 // returns true if the method is an accessor function (setter/getter). | |
| 602 bool is_accessor() const; | |
| 603 | |
| 604 // returns true if the method is an initializer (<init> or <clinit>). | |
| 605 bool is_initializer() const; | |
| 606 | |
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607 // returns true if the method is static OR if the classfile version < 51 |
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608 bool has_valid_initializer_flags() const; |
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609 |
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610 // returns true if the method name is <clinit> and the method has |
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611 // valid static initializer flags. |
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612 bool is_static_initializer() const; |
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613 |
| 0 | 614 // compiled code support |
| 615 // NOTE: code() is inherently racy as deopt can be clearing code | |
| 616 // simultaneously. Use with caution. | |
| 617 bool has_compiled_code() const { return code() != NULL; } | |
| 618 | |
| 619 // sizing | |
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620 static int header_size() { return sizeof(Method)/HeapWordSize; } |
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621 static int size(bool is_native); |
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622 int size() const { return method_size(); } |
| 7956 | 623 #if INCLUDE_SERVICES |
| 624 void collect_statistics(KlassSizeStats *sz) const; | |
| 625 #endif | |
| 0 | 626 |
| 627 // interpreter support | |
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628 static ByteSize const_offset() { return byte_offset_of(Method, _constMethod ); } |
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629 static ByteSize access_flags_offset() { return byte_offset_of(Method, _access_flags ); } |
| 0 | 630 #ifdef CC_INTERP |
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631 static ByteSize result_index_offset() { return byte_offset_of(Method, _result_index ); } |
| 0 | 632 #endif /* CC_INTERP */ |
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633 static ByteSize from_compiled_offset() { return byte_offset_of(Method, _from_compiled_entry); } |
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634 static ByteSize code_offset() { return byte_offset_of(Method, _code); } |
| 0 | 635 static ByteSize method_data_offset() { |
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636 return byte_offset_of(Method, _method_data); |
| 0 | 637 } |
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638 static ByteSize method_counters_offset() { |
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639 return byte_offset_of(Method, _method_counters); |
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640 } |
| 0 | 641 #ifndef PRODUCT |
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642 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(Method, _compiled_invocation_count); } |
| 0 | 643 #endif // not PRODUCT |
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644 static ByteSize native_function_offset() { return in_ByteSize(sizeof(Method)); } |
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645 static ByteSize from_interpreted_offset() { return byte_offset_of(Method, _from_interpreted_entry ); } |
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646 static ByteSize interpreter_entry_offset() { return byte_offset_of(Method, _i2i_entry ); } |
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647 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(Method) + wordSize); } |
| 0 | 648 |
| 649 // for code generation | |
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650 static int method_data_offset_in_bytes() { return offset_of(Method, _method_data); } |
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651 static int intrinsic_id_offset_in_bytes() { return offset_of(Method, _intrinsic_id); } |
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652 static int intrinsic_id_size_in_bytes() { return sizeof(u1); } |
| 0 | 653 |
| 654 // Static methods that are used to implement member methods where an exposed this pointer | |
| 655 // is needed due to possible GCs | |
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656 static objArrayHandle resolved_checked_exceptions_impl(Method* this_oop, TRAPS); |
| 0 | 657 |
| 658 // Returns the byte code index from the byte code pointer | |
| 659 int bci_from(address bcp) const; | |
| 660 address bcp_from(int bci) const; | |
| 661 int validate_bci_from_bcx(intptr_t bcx) const; | |
| 662 | |
| 663 // Returns the line number for a bci if debugging information for the method is prowided, | |
| 664 // -1 is returned otherwise. | |
| 665 int line_number_from_bci(int bci) const; | |
| 666 | |
| 667 // Reflection support | |
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668 bool is_overridden_in(Klass* k) const; |
| 0 | 669 |
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670 // Stack walking support |
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671 bool is_ignored_by_security_stack_walk() const; |
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672 |
| 710 | 673 // JSR 292 support |
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674 bool is_method_handle_intrinsic() const; // MethodHandles::is_signature_polymorphic_intrinsic(intrinsic_id) |
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675 bool is_compiled_lambda_form() const; // intrinsic_id() == vmIntrinsics::_compiledLambdaForm |
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676 bool has_member_arg() const; // intrinsic_id() == vmIntrinsics::_linkToSpecial, etc. |
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677 static methodHandle make_method_handle_intrinsic(vmIntrinsics::ID iid, // _invokeBasic, _linkToVirtual |
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678 Symbol* signature, //anything at all |
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679 TRAPS); |
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680 static Klass* check_non_bcp_klass(Klass* klass); |
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681 |
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682 // How many extra stack entries for invokedynamic when it's enabled |
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683 static const int extra_stack_entries_for_jsr292 = 1; |
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684 |
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685 // this operates only on invoke methods: |
| 710 | 686 // presize interpreter frames for extra interpreter stack entries, if needed |
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687 // Account for the extra appendix argument for invokehandle/invokedynamic |
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688 static int extra_stack_entries() { return EnableInvokeDynamic ? extra_stack_entries_for_jsr292 : 0; } |
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689 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize |
|
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690 |
| 0 | 691 // RedefineClasses() support: |
| 692 bool is_old() const { return access_flags().is_old(); } | |
| 693 void set_is_old() { _access_flags.set_is_old(); } | |
| 694 bool is_obsolete() const { return access_flags().is_obsolete(); } | |
| 695 void set_is_obsolete() { _access_flags.set_is_obsolete(); } | |
|
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696 bool on_stack() const { return access_flags().on_stack(); } |
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697 void set_on_stack(const bool value); |
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698 |
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699 // see the definition in Method*.cpp for the gory details |
|
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700 bool should_not_be_cached() const; |
| 0 | 701 |
| 702 // JVMTI Native method prefixing support: | |
| 703 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); } | |
| 704 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); } | |
| 705 | |
| 706 // Rewriting support | |
| 707 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, | |
| 708 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS); | |
| 709 | |
|
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710 // jmethodID handling |
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711 // Because the useful life-span of a jmethodID cannot be determined, |
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712 // once created they are never reclaimed. The methods to which they refer, |
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713 // however, can be GC'ed away if the class is unloaded or if the method is |
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714 // made obsolete or deleted -- in these cases, the jmethodID |
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715 // refers to NULL (as is the case for any weak reference). |
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716 static jmethodID make_jmethod_id(ClassLoaderData* loader_data, Method* mh); |
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717 static void destroy_jmethod_id(ClassLoaderData* loader_data, jmethodID mid); |
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718 |
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719 // Use resolve_jmethod_id() in situations where the caller is expected |
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720 // to provide a valid jmethodID; the only sanity checks are in asserts; |
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721 // result guaranteed not to be NULL. |
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722 inline static Method* resolve_jmethod_id(jmethodID mid) { |
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723 assert(mid != NULL, "JNI method id should not be null"); |
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724 return *((Method**)mid); |
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725 } |
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726 |
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727 // Use checked_resolve_jmethod_id() in situations where the caller |
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728 // should provide a valid jmethodID, but might not. NULL is returned |
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729 // when the jmethodID does not refer to a valid method. |
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730 static Method* checked_resolve_jmethod_id(jmethodID mid); |
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731 |
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732 static void change_method_associated_with_jmethod_id(jmethodID old_jmid_ptr, Method* new_method); |
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733 static bool is_method_id(jmethodID mid); |
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734 |
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735 // Clear methods |
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736 static void clear_jmethod_ids(ClassLoaderData* loader_data); |
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737 static void print_jmethod_ids(ClassLoaderData* loader_data, outputStream* out) PRODUCT_RETURN; |
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738 |
| 0 | 739 // Get this method's jmethodID -- allocate if it doesn't exist |
| 740 jmethodID jmethod_id() { methodHandle this_h(this); | |
|
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741 return InstanceKlass::get_jmethod_id(method_holder(), this_h); } |
| 0 | 742 |
| 743 // Lookup the jmethodID for this method. Return NULL if not found. | |
| 744 // NOTE that this function can be called from a signal handler | |
| 745 // (see AsyncGetCallTrace support for Forte Analyzer) and this | |
| 746 // needs to be async-safe. No allocation should be done and | |
| 747 // so handles are not used to avoid deadlock. | |
|
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748 jmethodID find_jmethod_id_or_null() { return method_holder()->jmethod_id_or_null(this); } |
| 0 | 749 |
| 750 // Support for inlining of intrinsic methods | |
|
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751 vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; } |
|
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752 void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; } |
|
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753 |
|
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754 // Helper routines for intrinsic_id() and vmIntrinsics::method(). |
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755 void init_intrinsic_id(); // updates from _none if a match |
|
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756 static vmSymbols::SID klass_id_for_intrinsics(Klass* holder); |
| 0 | 757 |
|
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758 bool jfr_towrite() { return _jfr_towrite; } |
|
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759 void set_jfr_towrite(bool x) { _jfr_towrite = x; } |
|
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760 bool caller_sensitive() { return _caller_sensitive; } |
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761 void set_caller_sensitive(bool x) { _caller_sensitive = x; } |
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762 bool force_inline() { return _force_inline; } |
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763 void set_force_inline(bool x) { _force_inline = x; } |
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764 bool dont_inline() { return _dont_inline; } |
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765 void set_dont_inline(bool x) { _dont_inline = x; } |
|
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766 bool is_hidden() { return _hidden; } |
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767 void set_hidden(bool x) { _hidden = x; } |
| 6934 | 768 ConstMethod::MethodType method_type() const { |
| 769 return _constMethod->method_type(); | |
| 770 } | |
| 771 bool is_overpass() const { return method_type() == ConstMethod::OVERPASS; } | |
|
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772 |
| 0 | 773 // On-stack replacement support |
| 1783 | 774 bool has_osr_nmethod(int level, bool match_level) { |
|
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775 return method_holder()->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL; |
| 1783 | 776 } |
| 777 | |
| 778 nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) { | |
|
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779 return method_holder()->lookup_osr_nmethod(this, bci, level, match_level); |
| 1783 | 780 } |
| 0 | 781 |
| 782 // Inline cache support | |
| 783 void cleanup_inline_caches(); | |
| 784 | |
| 785 // Find if klass for method is loaded | |
| 786 bool is_klass_loaded_by_klass_index(int klass_index) const; | |
| 787 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const; | |
| 788 | |
| 789 // Indicates whether compilation failed earlier for this method, or | |
| 790 // whether it is not compilable for another reason like having a | |
| 791 // breakpoint set in it. | |
|
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792 bool is_not_compilable(int comp_level = CompLevel_any) const; |
| 7998 | 793 void set_not_compilable(int comp_level = CompLevel_all, bool report = true, const char* reason = NULL); |
| 1783 | 794 void set_not_compilable_quietly(int comp_level = CompLevel_all) { |
|
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795 set_not_compilable(comp_level, false); |
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796 } |
|
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|
797 bool is_not_osr_compilable(int comp_level = CompLevel_any) const; |
| 7998 | 798 void set_not_osr_compilable(int comp_level = CompLevel_all, bool report = true, const char* reason = NULL); |
|
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799 void set_not_osr_compilable_quietly(int comp_level = CompLevel_all) { |
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800 set_not_osr_compilable(comp_level, false); |
| 1783 | 801 } |
|
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802 bool is_always_compilable() const; |
|
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803 |
|
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804 private: |
| 7998 | 805 void print_made_not_compilable(int comp_level, bool is_osr, bool report, const char* reason); |
|
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|
806 |
|
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807 MethodCounters* get_method_counters(TRAPS) { |
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808 if (_method_counters == NULL) { |
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809 build_method_counters(this, CHECK_AND_CLEAR_NULL); |
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810 } |
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811 return _method_counters; |
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812 } |
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813 |
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814 public: |
|
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815 bool is_not_c1_compilable() const { return access_flags().is_not_c1_compilable(); } |
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816 void set_not_c1_compilable() { _access_flags.set_not_c1_compilable(); } |
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817 void clear_not_c1_compilable() { _access_flags.clear_not_c1_compilable(); } |
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818 bool is_not_c2_compilable() const { return access_flags().is_not_c2_compilable(); } |
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819 void set_not_c2_compilable() { _access_flags.set_not_c2_compilable(); } |
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820 void clear_not_c2_compilable() { _access_flags.clear_not_c2_compilable(); } |
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821 |
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822 bool is_not_c1_osr_compilable() const { return is_not_c1_compilable(); } // don't waste an accessFlags bit |
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823 void set_not_c1_osr_compilable() { set_not_c1_compilable(); } // don't waste an accessFlags bit |
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824 void clear_not_c1_osr_compilable() { clear_not_c1_compilable(); } // don't waste an accessFlags bit |
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825 bool is_not_c2_osr_compilable() const { return access_flags().is_not_c2_osr_compilable(); } |
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826 void set_not_c2_osr_compilable() { _access_flags.set_not_c2_osr_compilable(); } |
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827 void clear_not_c2_osr_compilable() { _access_flags.clear_not_c2_osr_compilable(); } |
| 0 | 828 |
| 829 // Background compilation support | |
| 1783 | 830 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); } |
| 831 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); } | |
| 832 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); } | |
| 0 | 833 |
| 834 // Resolve all classes in signature, return 'true' if successful | |
| 835 static bool load_signature_classes(methodHandle m, TRAPS); | |
| 836 | |
| 837 // Return if true if not all classes references in signature, including return type, has been loaded | |
| 838 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS); | |
| 839 | |
| 840 // Printing | |
|
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841 void print_short_name(outputStream* st = tty); // prints as klassname::methodname; Exposed so field engineers can debug VM |
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842 #if INCLUDE_JVMTI |
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843 void print_name(outputStream* st = tty); // prints as "virtual void foo(int)"; exposed for TraceRedefineClasses |
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844 #else |
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845 void print_name(outputStream* st = tty) PRODUCT_RETURN; // prints as "virtual void foo(int)" |
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846 #endif |
| 0 | 847 |
| 848 // Helper routine used for method sorting | |
| 8031 | 849 static void sort_methods(Array<Method*>* methods, bool idempotent = false); |
| 0 | 850 |
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851 // Deallocation function for redefine classes or if an error occurs |
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852 void deallocate_contents(ClassLoaderData* loader_data); |
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853 |
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854 // Printing |
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855 #ifndef PRODUCT |
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856 void print_on(outputStream* st) const; |
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857 #endif |
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858 void print_value_on(outputStream* st) const; |
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859 |
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860 const char* internal_name() const { return "{method}"; } |
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861 |
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862 // Check for valid method pointer |
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863 bool is_valid_method() const; |
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864 |
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865 // Verify |
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866 void verify() { verify_on(tty); } |
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867 void verify_on(outputStream* st); |
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868 |
| 0 | 869 private: |
| 870 | |
| 871 // Inlined elements | |
| 872 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); } | |
| 873 address* signature_handler_addr() const { return native_function_addr() + 1; } | |
| 874 }; | |
| 875 | |
| 876 | |
| 877 // Utility class for compressing line number tables | |
| 878 | |
| 879 class CompressedLineNumberWriteStream: public CompressedWriteStream { | |
| 880 private: | |
| 881 int _bci; | |
| 882 int _line; | |
| 883 public: | |
| 884 // Constructor | |
| 885 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {} | |
| 886 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {} | |
| 887 | |
| 888 // Write (bci, line number) pair to stream | |
| 889 void write_pair_regular(int bci_delta, int line_delta); | |
| 890 | |
| 891 inline void write_pair_inline(int bci, int line) { | |
| 892 int bci_delta = bci - _bci; | |
| 893 int line_delta = line - _line; | |
| 894 _bci = bci; | |
| 895 _line = line; | |
| 896 // Skip (0,0) deltas - they do not add information and conflict with terminator. | |
| 897 if (bci_delta == 0 && line_delta == 0) return; | |
| 898 // Check if bci is 5-bit and line number 3-bit unsigned. | |
| 899 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) { | |
| 900 // Compress into single byte. | |
| 901 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta; | |
| 902 // Check that value doesn't match escape character. | |
| 903 if (value != 0xFF) { | |
| 904 write_byte(value); | |
| 905 return; | |
| 906 } | |
| 907 } | |
| 908 write_pair_regular(bci_delta, line_delta); | |
| 909 } | |
| 910 | |
| 911 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair. | |
| 912 // Disabling optimization doesn't work for methods in header files | |
| 913 // so we force it to call through the non-optimized version in the .cpp. | |
| 914 // It's gross, but it's the only way we can ensure that all callers are | |
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915 // fixed. _MSC_VER is defined by the windows compiler |
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916 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
| 0 | 917 void write_pair(int bci, int line); |
| 918 #else | |
| 919 void write_pair(int bci, int line) { write_pair_inline(bci, line); } | |
| 920 #endif | |
| 921 | |
| 922 // Write end-of-stream marker | |
| 923 void write_terminator() { write_byte(0); } | |
| 924 }; | |
| 925 | |
| 926 | |
| 927 // Utility class for decompressing line number tables | |
| 928 | |
| 929 class CompressedLineNumberReadStream: public CompressedReadStream { | |
| 930 private: | |
| 931 int _bci; | |
| 932 int _line; | |
| 933 public: | |
| 934 // Constructor | |
| 935 CompressedLineNumberReadStream(u_char* buffer); | |
| 936 // Read (bci, line number) pair from stream. Returns false at end-of-stream. | |
| 937 bool read_pair(); | |
| 938 // Accessing bci and line number (after calling read_pair) | |
| 939 int bci() const { return _bci; } | |
| 940 int line() const { return _line; } | |
| 941 }; | |
| 942 | |
| 943 | |
| 944 /// Fast Breakpoints. | |
| 945 | |
| 946 // If this structure gets more complicated (because bpts get numerous), | |
| 947 // move it into its own header. | |
| 948 | |
| 949 // There is presently no provision for concurrent access | |
| 950 // to breakpoint lists, which is only OK for JVMTI because | |
| 951 // breakpoints are written only at safepoints, and are read | |
| 952 // concurrently only outside of safepoints. | |
| 953 | |
| 6197 | 954 class BreakpointInfo : public CHeapObj<mtClass> { |
| 0 | 955 friend class VMStructs; |
| 956 private: | |
| 957 Bytecodes::Code _orig_bytecode; | |
| 958 int _bci; | |
| 959 u2 _name_index; // of method | |
| 960 u2 _signature_index; // of method | |
| 961 BreakpointInfo* _next; // simple storage allocation | |
| 962 | |
| 963 public: | |
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964 BreakpointInfo(Method* m, int bci); |
| 0 | 965 |
| 966 // accessors | |
| 967 Bytecodes::Code orig_bytecode() { return _orig_bytecode; } | |
| 968 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; } | |
| 969 int bci() { return _bci; } | |
| 970 | |
| 971 BreakpointInfo* next() const { return _next; } | |
| 972 void set_next(BreakpointInfo* n) { _next = n; } | |
| 973 | |
| 974 // helps for searchers | |
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975 bool match(const Method* m, int bci) { |
| 0 | 976 return bci == _bci && match(m); |
| 977 } | |
| 978 | |
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979 bool match(const Method* m) { |
| 0 | 980 return _name_index == m->name_index() && |
| 981 _signature_index == m->signature_index(); | |
| 982 } | |
| 983 | |
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984 void set(Method* method); |
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985 void clear(Method* method); |
| 0 | 986 }; |
| 1972 | 987 |
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988 // Utility class for access exception handlers |
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989 class ExceptionTable : public StackObj { |
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990 private: |
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991 ExceptionTableElement* _table; |
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992 u2 _length; |
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993 |
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994 public: |
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995 ExceptionTable(const Method* m) { |
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996 if (m->has_exception_handler()) { |
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997 _table = m->exception_table_start(); |
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998 _length = m->exception_table_length(); |
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999 } else { |
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1000 _table = NULL; |
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1001 _length = 0; |
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1002 } |
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1003 } |
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1004 |
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1005 int length() const { |
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1006 return _length; |
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1007 } |
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1008 |
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1009 u2 start_pc(int idx) const { |
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1010 assert(idx < _length, "out of bounds"); |
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1011 return _table[idx].start_pc; |
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1012 } |
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1013 |
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1014 void set_start_pc(int idx, u2 value) { |
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1015 assert(idx < _length, "out of bounds"); |
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1016 _table[idx].start_pc = value; |
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1017 } |
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1018 |
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1019 u2 end_pc(int idx) const { |
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1020 assert(idx < _length, "out of bounds"); |
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1021 return _table[idx].end_pc; |
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1022 } |
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1023 |
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1024 void set_end_pc(int idx, u2 value) { |
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1025 assert(idx < _length, "out of bounds"); |
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1026 _table[idx].end_pc = value; |
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1027 } |
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1028 |
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1029 u2 handler_pc(int idx) const { |
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1030 assert(idx < _length, "out of bounds"); |
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1031 return _table[idx].handler_pc; |
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1032 } |
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1033 |
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1034 void set_handler_pc(int idx, u2 value) { |
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1035 assert(idx < _length, "out of bounds"); |
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1036 _table[idx].handler_pc = value; |
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1037 } |
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1038 |
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1039 u2 catch_type_index(int idx) const { |
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1040 assert(idx < _length, "out of bounds"); |
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1041 return _table[idx].catch_type_index; |
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1042 } |
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1043 |
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1044 void set_catch_type_index(int idx, u2 value) { |
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1045 assert(idx < _length, "out of bounds"); |
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1046 _table[idx].catch_type_index = value; |
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1047 } |
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1048 }; |
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1049 |
| 1972 | 1050 #endif // SHARE_VM_OOPS_METHODOOP_HPP |