Mercurial > hg > truffle
annotate src/share/vm/oops/methodOop.hpp @ 6123:2fe087c3e814
7172967: Eliminate constMethod's _method backpointer to methodOop.
Summary: Eliminate constMethod's _method backpointer to methodOop, and move the _constant field from methodOop to constMethod.
Reviewed-by: roland, bdelsart, kamg
| author | jiangli |
|---|---|
| date | Wed, 06 Jun 2012 14:33:43 -0400 |
| parents | 0382d2b469b2 |
| children | eba1d5bce9e8 |
| 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" | |
| 32 #include "oops/constMethodOop.hpp" | |
| 33 #include "oops/constantPoolOop.hpp" | |
| 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 | |
| 0 | 40 // A methodOop represents a Java method. |
| 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 // | |
| 47 // The actual bytecodes are inlined after the end of the methodOopDesc struct. | |
| 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 // |------------------------------------------------------| | |
| 66 // | constMethodOop (oop) | | |
| 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; | |
| 105 class methodDataOopDesc; | |
| 106 | |
| 107 class methodOopDesc : public oopDesc { | |
| 108 friend class methodKlass; | |
| 109 friend class VMStructs; | |
| 110 private: | |
| 111 constMethodOop _constMethod; // Method read-only data. | |
| 112 methodDataOop _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 : 7; |
| 0 | 127 u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting |
| 128 u2 _number_of_breakpoints; // fullspeed debugging support | |
| 129 InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations | |
| 130 InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations | |
| 1783 | 131 |
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132 #ifdef TIERED |
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133 jlong _prev_time; // Previous time the rate was acquired |
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134 float _rate; // Events (invocation and backedge counter increments) per millisecond |
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135 #endif |
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136 |
| 0 | 137 #ifndef PRODUCT |
| 138 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging) | |
| 139 #endif | |
| 140 // Entry point for calling both from and to the interpreter. | |
| 141 address _i2i_entry; // All-args-on-stack calling convention | |
| 142 // Adapter blob (i2c/c2i) for this methodOop. Set once when method is linked. | |
| 143 AdapterHandlerEntry* _adapter; | |
| 144 // Entry point for calling from compiled code, to compiled code if it exists | |
| 145 // or else the interpreter. | |
| 146 volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry() | |
| 147 // The entry point for calling both from and to compiled code is | |
| 148 // "_code->entry_point()". Because of tiered compilation and de-opt, this | |
| 149 // field can come and go. It can transition from NULL to not-null at any | |
| 150 // time (whenever a compile completes). It can transition from not-null to | |
| 151 // NULL only at safepoints (because of a de-opt). | |
| 152 nmethod* volatile _code; // Points to the corresponding piece of native code | |
| 153 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry | |
| 154 | |
| 155 public: | |
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156 |
| 0 | 157 // accessors for instance variables |
| 158 constMethodOop constMethod() const { return _constMethod; } | |
| 159 void set_constMethod(constMethodOop xconst) { oop_store_without_check((oop*)&_constMethod, (oop)xconst); } | |
| 160 | |
| 161 | |
| 162 static address make_adapters(methodHandle mh, TRAPS); | |
| 163 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); } | |
| 164 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); } | |
| 165 | |
| 166 // access flag | |
| 167 AccessFlags access_flags() const { return _access_flags; } | |
| 168 void set_access_flags(AccessFlags flags) { _access_flags = flags; } | |
| 169 | |
| 170 // name | |
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171 Symbol* name() const { return constants()->symbol_at(name_index()); } |
| 0 | 172 int name_index() const { return constMethod()->name_index(); } |
| 173 void set_name_index(int index) { constMethod()->set_name_index(index); } | |
| 174 | |
| 175 // signature | |
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176 Symbol* signature() const { return constants()->symbol_at(signature_index()); } |
| 0 | 177 int signature_index() const { return constMethod()->signature_index(); } |
| 178 void set_signature_index(int index) { constMethod()->set_signature_index(index); } | |
| 179 | |
| 180 // generics support | |
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181 Symbol* generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? constants()->symbol_at(idx) : (Symbol*)NULL); } |
| 0 | 182 int generic_signature_index() const { return constMethod()->generic_signature_index(); } |
| 183 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); } | |
| 184 | |
| 185 // annotations support | |
| 186 typeArrayOop annotations() const { return instanceKlass::cast(method_holder())->get_method_annotations_of(method_idnum()); } | |
| 187 typeArrayOop parameter_annotations() const { return instanceKlass::cast(method_holder())->get_method_parameter_annotations_of(method_idnum()); } | |
| 188 typeArrayOop annotation_default() const { return instanceKlass::cast(method_holder())->get_method_default_annotations_of(method_idnum()); } | |
| 189 | |
| 190 #ifdef CC_INTERP | |
| 191 void set_result_index(BasicType type); | |
| 192 int result_index() { return _result_index; } | |
| 193 #endif | |
| 194 | |
| 195 // Helper routine: get klass name + "." + method name + signature as | |
| 196 // C string, for the purpose of providing more useful NoSuchMethodErrors | |
| 197 // and fatal error handling. The string is allocated in resource | |
| 198 // area if a buffer is not provided by the caller. | |
| 199 char* name_and_sig_as_C_string(); | |
| 200 char* name_and_sig_as_C_string(char* buf, int size); | |
| 201 | |
| 202 // Static routine in the situations we don't have a methodOop | |
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203 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature); |
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204 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size); |
| 0 | 205 |
| 2142 | 206 Bytecodes::Code java_code_at(int bci) const { |
| 207 return Bytecodes::java_code_at(this, bcp_from(bci)); | |
| 208 } | |
| 209 Bytecodes::Code code_at(int bci) const { | |
| 210 return Bytecodes::code_at(this, bcp_from(bci)); | |
| 211 } | |
| 212 | |
| 0 | 213 // JVMTI breakpoints |
| 2142 | 214 Bytecodes::Code orig_bytecode_at(int bci) const; |
| 0 | 215 void set_orig_bytecode_at(int bci, Bytecodes::Code code); |
| 216 void set_breakpoint(int bci); | |
| 217 void clear_breakpoint(int bci); | |
| 218 void clear_all_breakpoints(); | |
| 219 // Tracking number of breakpoints, for fullspeed debugging. | |
| 220 // Only mutated by VM thread. | |
| 221 u2 number_of_breakpoints() const { return _number_of_breakpoints; } | |
| 222 void incr_number_of_breakpoints() { ++_number_of_breakpoints; } | |
| 223 void decr_number_of_breakpoints() { --_number_of_breakpoints; } | |
| 224 // Initialization only | |
| 225 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; } | |
| 226 | |
| 227 // index into instanceKlass methods() array | |
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228 // note: also used by jfr |
| 0 | 229 u2 method_idnum() const { return constMethod()->method_idnum(); } |
| 230 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); } | |
| 231 | |
| 232 // code size | |
| 233 int code_size() const { return constMethod()->code_size(); } | |
| 234 | |
| 235 // method size | |
| 236 int method_size() const { return _method_size; } | |
| 237 void set_method_size(int size) { | |
| 238 assert(0 <= size && size < (1 << 16), "invalid method size"); | |
| 239 _method_size = size; | |
| 240 } | |
| 241 | |
| 242 // constant pool for klassOop holding this method | |
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243 constantPoolOop constants() const { return constMethod()->constants(); } |
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244 void set_constants(constantPoolOop c) { constMethod()->set_constants(c); } |
| 0 | 245 |
| 246 // max stack | |
| 247 int max_stack() const { return _max_stack; } | |
| 248 void set_max_stack(int size) { _max_stack = size; } | |
| 249 | |
| 250 // max locals | |
| 251 int max_locals() const { return _max_locals; } | |
| 252 void set_max_locals(int size) { _max_locals = size; } | |
| 1783 | 253 |
| 254 int highest_comp_level() const; | |
| 255 void set_highest_comp_level(int level); | |
| 256 int highest_osr_comp_level() const; | |
| 257 void set_highest_osr_comp_level(int level); | |
| 0 | 258 |
| 259 // Count of times method was exited via exception while interpreting | |
| 260 void interpreter_throwout_increment() { | |
| 261 if (_interpreter_throwout_count < 65534) { | |
| 262 _interpreter_throwout_count++; | |
| 263 } | |
| 264 } | |
| 265 | |
| 266 int interpreter_throwout_count() const { return _interpreter_throwout_count; } | |
| 267 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; } | |
| 268 | |
| 269 // size of parameters | |
| 270 int size_of_parameters() const { return _size_of_parameters; } | |
| 271 | |
| 272 bool has_stackmap_table() const { | |
| 273 return constMethod()->has_stackmap_table(); | |
| 274 } | |
| 275 | |
| 276 typeArrayOop stackmap_data() const { | |
| 277 return constMethod()->stackmap_data(); | |
| 278 } | |
| 279 | |
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280 void set_stackmap_data(typeArrayOop sd) { |
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281 constMethod()->set_stackmap_data(sd); |
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282 } |
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283 |
| 0 | 284 // exception handler table |
| 285 typeArrayOop exception_table() const | |
| 286 { return constMethod()->exception_table(); } | |
| 287 void set_exception_table(typeArrayOop e) | |
| 288 { constMethod()->set_exception_table(e); } | |
| 289 bool has_exception_handler() const | |
| 290 { return constMethod()->has_exception_handler(); } | |
| 291 | |
| 292 // Finds the first entry point bci of an exception handler for an | |
| 293 // exception of klass ex_klass thrown at throw_bci. A value of NULL | |
| 294 // for ex_klass indicates that the exception klass is not known; in | |
| 295 // this case it matches any constraint class. Returns -1 if the | |
| 296 // exception cannot be handled in this method. The handler | |
| 297 // constraint classes are loaded if necessary. Note that this may | |
| 298 // throw an exception if loading of the constraint classes causes | |
| 299 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError. | |
| 300 // If an exception is thrown, returns the bci of the | |
| 301 // exception handler which caused the exception to be thrown, which | |
| 302 // is needed for proper retries. See, for example, | |
| 303 // InterpreterRuntime::exception_handler_for_exception. | |
| 304 int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS); | |
| 305 | |
| 306 // method data access | |
| 307 methodDataOop method_data() const { | |
| 308 return _method_data; | |
| 309 } | |
| 310 void set_method_data(methodDataOop data) { | |
| 311 oop_store_without_check((oop*)&_method_data, (oop)data); | |
| 312 } | |
| 313 | |
| 314 // invocation counter | |
| 1783 | 315 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
| 316 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
| 317 | |
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318 #ifdef TIERED |
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319 // We are reusing interpreter_invocation_count as a holder for the previous event count! |
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320 // We can do that since interpreter_invocation_count is not used in tiered. |
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321 int prev_event_count() const { return _interpreter_invocation_count; } |
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322 void set_prev_event_count(int count) { _interpreter_invocation_count = count; } |
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323 jlong prev_time() const { return _prev_time; } |
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324 void set_prev_time(jlong time) { _prev_time = time; } |
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325 float rate() const { return _rate; } |
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326 void set_rate(float rate) { _rate = rate; } |
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327 #endif |
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328 |
| 1783 | 329 int invocation_count(); |
| 330 int backedge_count(); | |
| 331 | |
| 332 bool was_executed_more_than(int n); | |
| 333 bool was_never_executed() { return !was_executed_more_than(0); } | |
| 0 | 334 |
| 335 static void build_interpreter_method_data(methodHandle method, TRAPS); | |
| 336 | |
| 1783 | 337 int interpreter_invocation_count() { |
| 338 if (TieredCompilation) return invocation_count(); | |
| 339 else return _interpreter_invocation_count; | |
| 340 } | |
| 0 | 341 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; } |
| 1783 | 342 int increment_interpreter_invocation_count() { |
| 343 if (TieredCompilation) ShouldNotReachHere(); | |
| 344 return ++_interpreter_invocation_count; | |
| 345 } | |
| 0 | 346 |
| 347 #ifndef PRODUCT | |
| 1783 | 348 int compiled_invocation_count() const { return _compiled_invocation_count; } |
| 0 | 349 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; } |
| 350 #endif // not PRODUCT | |
| 351 | |
| 605 | 352 // Clear (non-shared space) pointers which could not be relevant |
| 0 | 353 // if this (shared) method were mapped into another JVM. |
| 354 void remove_unshareable_info(); | |
| 355 | |
| 356 // nmethod/verified compiler entry | |
| 357 address verified_code_entry(); | |
| 358 bool check_code() const; // Not inline to avoid circular ref | |
| 359 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); } | |
| 360 void clear_code(); // Clear out any compiled code | |
| 1202 | 361 static void set_code(methodHandle mh, nmethod* code); |
| 0 | 362 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; } |
| 363 address get_i2c_entry(); | |
| 364 address get_c2i_entry(); | |
| 365 address get_c2i_unverified_entry(); | |
| 366 AdapterHandlerEntry* adapter() { return _adapter; } | |
| 367 // setup entry points | |
| 368 void link_method(methodHandle method, TRAPS); | |
| 369 // clear entry points. Used by sharing code | |
| 370 void unlink_method(); | |
| 371 | |
| 372 // vtable index | |
| 373 enum VtableIndexFlag { | |
| 374 // Valid vtable indexes are non-negative (>= 0). | |
| 375 // These few negative values are used as sentinels. | |
| 710 | 376 highest_unused_vtable_index_value = -5, |
| 0 | 377 invalid_vtable_index = -4, // distinct from any valid vtable index |
| 378 garbage_vtable_index = -3, // not yet linked; no vtable layout yet | |
| 379 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch | |
| 380 // 6330203 Note: Do not use -1, which was overloaded with many meanings. | |
| 381 }; | |
| 382 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; }) | |
| 383 int vtable_index() const { assert(valid_vtable_index(), ""); | |
| 384 return _vtable_index; } | |
| 385 void set_vtable_index(int index) { _vtable_index = index; } | |
| 386 | |
| 387 // interpreter entry | |
| 388 address interpreter_entry() const { return _i2i_entry; } | |
| 389 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry | |
| 390 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; } | |
| 391 int interpreter_kind(void) { | |
| 392 return constMethod()->interpreter_kind(); | |
| 393 } | |
| 394 void set_interpreter_kind(); | |
| 395 void set_interpreter_kind(int kind) { | |
| 396 constMethod()->set_interpreter_kind(kind); | |
| 397 } | |
| 398 | |
| 399 // native function (used for native methods only) | |
| 400 enum { | |
| 401 native_bind_event_is_interesting = true | |
| 402 }; | |
| 403 address native_function() const { return *(native_function_addr()); } | |
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404 address critical_native_function(); |
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405 |
| 0 | 406 // Must specify a real function (not NULL). |
| 407 // Use clear_native_function() to unregister. | |
| 408 void set_native_function(address function, bool post_event_flag); | |
| 409 bool has_native_function() const; | |
| 410 void clear_native_function(); | |
| 411 | |
| 412 // signature handler (used for native methods only) | |
| 413 address signature_handler() const { return *(signature_handler_addr()); } | |
| 414 void set_signature_handler(address handler); | |
| 415 | |
| 416 // Interpreter oopmap support | |
| 417 void mask_for(int bci, InterpreterOopMap* mask); | |
| 418 | |
| 419 #ifndef PRODUCT | |
| 420 // operations on invocation counter | |
| 1783 | 421 void print_invocation_count(); |
| 0 | 422 #endif |
| 423 | |
| 424 // byte codes | |
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425 void set_code(address code) { return constMethod()->set_code(code); } |
| 0 | 426 address code_base() const { return constMethod()->code_base(); } |
| 427 bool contains(address bcp) const { return constMethod()->contains(bcp); } | |
| 428 | |
| 429 // prints byte codes | |
| 430 void print_codes() const { print_codes_on(tty); } | |
| 431 void print_codes_on(outputStream* st) const PRODUCT_RETURN; | |
| 432 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN; | |
| 433 | |
| 434 // checked exceptions | |
| 435 int checked_exceptions_length() const | |
| 436 { return constMethod()->checked_exceptions_length(); } | |
| 437 CheckedExceptionElement* checked_exceptions_start() const | |
| 438 { return constMethod()->checked_exceptions_start(); } | |
| 439 | |
| 440 // localvariable table | |
| 441 bool has_localvariable_table() const | |
| 442 { return constMethod()->has_localvariable_table(); } | |
| 443 int localvariable_table_length() const | |
| 444 { return constMethod()->localvariable_table_length(); } | |
| 445 LocalVariableTableElement* localvariable_table_start() const | |
| 446 { return constMethod()->localvariable_table_start(); } | |
| 447 | |
| 448 bool has_linenumber_table() const | |
| 449 { return constMethod()->has_linenumber_table(); } | |
| 450 u_char* compressed_linenumber_table() const | |
| 451 { return constMethod()->compressed_linenumber_table(); } | |
| 452 | |
| 453 // method holder (the klassOop holding this method) | |
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454 klassOop method_holder() const { return constants()->pool_holder(); } |
| 0 | 455 |
| 456 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments) | |
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457 Symbol* klass_name() const; // returns the name of the method holder |
| 0 | 458 BasicType result_type() const; // type of the method result |
| 459 int result_type_index() const; // type index of the method result | |
| 460 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); } | |
| 461 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); } | |
| 462 | |
| 463 // Checked exceptions thrown by this method (resolved to mirrors) | |
| 464 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); } | |
| 465 | |
| 466 // Access flags | |
| 467 bool is_public() const { return access_flags().is_public(); } | |
| 468 bool is_private() const { return access_flags().is_private(); } | |
| 469 bool is_protected() const { return access_flags().is_protected(); } | |
| 470 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } | |
| 471 bool is_static() const { return access_flags().is_static(); } | |
| 472 bool is_final() const { return access_flags().is_final(); } | |
| 473 bool is_synchronized() const { return access_flags().is_synchronized();} | |
| 474 bool is_native() const { return access_flags().is_native(); } | |
| 475 bool is_abstract() const { return access_flags().is_abstract(); } | |
| 476 bool is_strict() const { return access_flags().is_strict(); } | |
| 477 bool is_synthetic() const { return access_flags().is_synthetic(); } | |
| 478 | |
| 479 // returns true if contains only return operation | |
| 480 bool is_empty_method() const; | |
| 481 | |
| 482 // returns true if this is a vanilla constructor | |
| 483 bool is_vanilla_constructor() const; | |
| 484 | |
| 485 // checks method and its method holder | |
| 486 bool is_final_method() const; | |
| 487 bool is_strict_method() const; | |
| 488 | |
| 489 // true if method needs no dynamic dispatch (final and/or no vtable entry) | |
| 490 bool can_be_statically_bound() const; | |
| 491 | |
| 492 // returns true if the method has any backward branches. | |
| 493 bool has_loops() { | |
| 494 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag(); | |
| 495 }; | |
| 496 | |
| 497 bool compute_has_loops_flag(); | |
| 498 | |
| 499 bool has_jsrs() { | |
| 500 return access_flags().has_jsrs(); | |
| 501 }; | |
| 502 void set_has_jsrs() { | |
| 503 _access_flags.set_has_jsrs(); | |
| 504 } | |
| 505 | |
| 506 // returns true if the method has any monitors. | |
| 507 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); } | |
| 508 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); } | |
| 509 | |
| 510 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); } | |
| 511 | |
| 512 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes | |
| 513 // propererly nest in the method. It might return false, even though they actually nest properly, since the info. | |
| 514 // has not been computed yet. | |
| 515 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); } | |
| 516 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); } | |
| 517 | |
| 518 // returns true if the method is an accessor function (setter/getter). | |
| 519 bool is_accessor() const; | |
| 520 | |
| 521 // returns true if the method is an initializer (<init> or <clinit>). | |
| 522 bool is_initializer() const; | |
| 523 | |
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524 // returns true if the method is static OR if the classfile version < 51 |
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525 bool has_valid_initializer_flags() const; |
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526 |
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527 // returns true if the method name is <clinit> and the method has |
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528 // valid static initializer flags. |
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529 bool is_static_initializer() const; |
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530 |
| 0 | 531 // compiled code support |
| 532 // NOTE: code() is inherently racy as deopt can be clearing code | |
| 533 // simultaneously. Use with caution. | |
| 534 bool has_compiled_code() const { return code() != NULL; } | |
| 535 | |
| 536 // sizing | |
| 537 static int object_size(bool is_native); | |
| 538 static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; } | |
| 539 int object_size() const { return method_size(); } | |
| 540 | |
| 541 bool object_is_parsable() const { return method_size() > 0; } | |
| 542 | |
| 543 // interpreter support | |
| 544 static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); } | |
| 545 static ByteSize access_flags_offset() { return byte_offset_of(methodOopDesc, _access_flags ); } | |
| 546 #ifdef CC_INTERP | |
| 547 static ByteSize result_index_offset() { return byte_offset_of(methodOopDesc, _result_index ); } | |
| 548 #endif /* CC_INTERP */ | |
| 549 static ByteSize size_of_locals_offset() { return byte_offset_of(methodOopDesc, _max_locals ); } | |
| 550 static ByteSize size_of_parameters_offset() { return byte_offset_of(methodOopDesc, _size_of_parameters); } | |
| 551 static ByteSize from_compiled_offset() { return byte_offset_of(methodOopDesc, _from_compiled_entry); } | |
| 552 static ByteSize code_offset() { return byte_offset_of(methodOopDesc, _code); } | |
| 553 static ByteSize invocation_counter_offset() { return byte_offset_of(methodOopDesc, _invocation_counter); } | |
| 554 static ByteSize backedge_counter_offset() { return byte_offset_of(methodOopDesc, _backedge_counter); } | |
| 555 static ByteSize method_data_offset() { | |
| 556 return byte_offset_of(methodOopDesc, _method_data); | |
| 557 } | |
| 558 static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); } | |
| 559 #ifndef PRODUCT | |
| 560 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); } | |
| 561 #endif // not PRODUCT | |
| 562 static ByteSize native_function_offset() { return in_ByteSize(sizeof(methodOopDesc)); } | |
| 563 static ByteSize from_interpreted_offset() { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); } | |
| 564 static ByteSize interpreter_entry_offset() { return byte_offset_of(methodOopDesc, _i2i_entry ); } | |
| 565 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(methodOopDesc) + wordSize); } | |
| 566 static ByteSize max_stack_offset() { return byte_offset_of(methodOopDesc, _max_stack ); } | |
| 567 | |
| 568 // for code generation | |
| 569 static int method_data_offset_in_bytes() { return offset_of(methodOopDesc, _method_data); } | |
| 570 static int interpreter_invocation_counter_offset_in_bytes() | |
| 571 { return offset_of(methodOopDesc, _interpreter_invocation_count); } | |
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572 static int intrinsic_id_offset_in_bytes() { return offset_of(methodOopDesc, _intrinsic_id); } |
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573 static int intrinsic_id_size_in_bytes() { return sizeof(u1); } |
| 0 | 574 |
| 575 // Static methods that are used to implement member methods where an exposed this pointer | |
| 576 // is needed due to possible GCs | |
| 577 static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS); | |
| 578 | |
| 579 // Returns the byte code index from the byte code pointer | |
| 580 int bci_from(address bcp) const; | |
| 581 address bcp_from(int bci) const; | |
| 582 int validate_bci_from_bcx(intptr_t bcx) const; | |
| 583 | |
| 584 // Returns the line number for a bci if debugging information for the method is prowided, | |
| 585 // -1 is returned otherwise. | |
| 586 int line_number_from_bci(int bci) const; | |
| 587 | |
| 588 // Reflection support | |
| 589 bool is_overridden_in(klassOop k) const; | |
| 590 | |
| 710 | 591 // JSR 292 support |
| 592 bool is_method_handle_invoke() const { return access_flags().is_method_handle_invoke(); } | |
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593 static bool is_method_handle_invoke_name(vmSymbols::SID name_sid); |
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594 static bool is_method_handle_invoke_name(Symbol* name) { |
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595 return is_method_handle_invoke_name(vmSymbols::find_sid(name)); |
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596 } |
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597 // Tests if this method is an internal adapter frame from the |
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598 // MethodHandleCompiler. |
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599 bool is_method_handle_adapter() const; |
| 710 | 600 static methodHandle make_invoke_method(KlassHandle holder, |
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601 Symbol* name, //invokeExact or invokeGeneric |
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602 Symbol* signature, //anything at all |
| 710 | 603 Handle method_type, |
| 604 TRAPS); | |
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605 static klassOop check_non_bcp_klass(klassOop klass); |
| 710 | 606 // these operate only on invoke methods: |
| 607 oop method_handle_type() const; | |
| 608 static jint* method_type_offsets_chain(); // series of pointer-offsets, terminated by -1 | |
| 609 // presize interpreter frames for extra interpreter stack entries, if needed | |
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610 // method handles want to be able to push a few extra values (e.g., a bound receiver), and |
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611 // invokedynamic sometimes needs to push a bootstrap method, call site, and arglist, |
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612 // all without checking for a stack overflow |
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613 static int extra_stack_entries() { return EnableInvokeDynamic ? (int) MethodHandlePushLimit + 3 : 0; } |
| 710 | 614 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize() |
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615 |
| 0 | 616 // RedefineClasses() support: |
| 617 bool is_old() const { return access_flags().is_old(); } | |
| 618 void set_is_old() { _access_flags.set_is_old(); } | |
| 619 bool is_obsolete() const { return access_flags().is_obsolete(); } | |
| 620 void set_is_obsolete() { _access_flags.set_is_obsolete(); } | |
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621 // see the definition in methodOop.cpp for the gory details |
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622 bool should_not_be_cached() const; |
| 0 | 623 |
| 624 // JVMTI Native method prefixing support: | |
| 625 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); } | |
| 626 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); } | |
| 627 | |
| 628 // Rewriting support | |
| 629 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, | |
| 630 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS); | |
| 631 | |
| 632 // Get this method's jmethodID -- allocate if it doesn't exist | |
| 633 jmethodID jmethod_id() { methodHandle this_h(this); | |
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634 return instanceKlass::get_jmethod_id(method_holder(), this_h); } |
| 0 | 635 |
| 636 // Lookup the jmethodID for this method. Return NULL if not found. | |
| 637 // NOTE that this function can be called from a signal handler | |
| 638 // (see AsyncGetCallTrace support for Forte Analyzer) and this | |
| 639 // needs to be async-safe. No allocation should be done and | |
| 640 // so handles are not used to avoid deadlock. | |
| 641 jmethodID find_jmethod_id_or_null() { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); } | |
| 642 | |
| 643 // JNI static invoke cached itable index accessors | |
| 644 int cached_itable_index() { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); } | |
| 645 void set_cached_itable_index(int index) { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); } | |
| 646 | |
| 647 // Support for inlining of intrinsic methods | |
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648 vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; } |
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649 void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; } |
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650 |
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651 // Helper routines for intrinsic_id() and vmIntrinsics::method(). |
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652 void init_intrinsic_id(); // updates from _none if a match |
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653 static vmSymbols::SID klass_id_for_intrinsics(klassOop holder); |
| 0 | 654 |
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655 bool jfr_towrite() { return _jfr_towrite; } |
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656 void set_jfr_towrite(bool towrite) { _jfr_towrite = towrite; } |
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657 |
| 0 | 658 // On-stack replacement support |
| 1783 | 659 bool has_osr_nmethod(int level, bool match_level) { |
| 660 return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL; | |
| 661 } | |
| 662 | |
| 663 nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) { | |
| 664 return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci, level, match_level); | |
| 665 } | |
| 0 | 666 |
| 667 // Inline cache support | |
| 668 void cleanup_inline_caches(); | |
| 669 | |
| 670 // Find if klass for method is loaded | |
| 671 bool is_klass_loaded_by_klass_index(int klass_index) const; | |
| 672 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const; | |
| 673 | |
| 674 // Indicates whether compilation failed earlier for this method, or | |
| 675 // whether it is not compilable for another reason like having a | |
| 676 // breakpoint set in it. | |
| 1783 | 677 bool is_not_compilable(int comp_level = CompLevel_any) const; |
| 678 void set_not_compilable(int comp_level = CompLevel_all, bool report = true); | |
| 679 void set_not_compilable_quietly(int comp_level = CompLevel_all) { | |
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680 set_not_compilable(comp_level, false); |
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681 } |
| 1783 | 682 bool is_not_osr_compilable(int comp_level = CompLevel_any) const { |
| 683 return is_not_compilable(comp_level) || access_flags().is_not_osr_compilable(); | |
| 684 } | |
| 685 void set_not_osr_compilable() { _access_flags.set_not_osr_compilable(); } | |
| 686 bool is_not_c1_compilable() const { return access_flags().is_not_c1_compilable(); } | |
| 687 void set_not_c1_compilable() { _access_flags.set_not_c1_compilable(); } | |
| 688 bool is_not_c2_compilable() const { return access_flags().is_not_c2_compilable(); } | |
| 689 void set_not_c2_compilable() { _access_flags.set_not_c2_compilable(); } | |
| 0 | 690 |
| 691 // Background compilation support | |
| 1783 | 692 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); } |
| 693 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); } | |
| 694 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); } | |
| 0 | 695 |
| 696 // Resolve all classes in signature, return 'true' if successful | |
| 697 static bool load_signature_classes(methodHandle m, TRAPS); | |
| 698 | |
| 699 // Return if true if not all classes references in signature, including return type, has been loaded | |
| 700 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS); | |
| 701 | |
| 702 // Printing | |
| 703 void print_short_name(outputStream* st) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM | |
| 704 void print_name(outputStream* st) PRODUCT_RETURN; // prints as "virtual void foo(int)" | |
| 705 | |
| 706 // Helper routine used for method sorting | |
| 707 static void sort_methods(objArrayOop methods, | |
| 708 objArrayOop methods_annotations, | |
| 709 objArrayOop methods_parameter_annotations, | |
| 710 objArrayOop methods_default_annotations, | |
| 711 bool idempotent = false); | |
| 712 | |
| 713 // size of parameters | |
| 714 void set_size_of_parameters(int size) { _size_of_parameters = size; } | |
| 715 private: | |
| 716 | |
| 717 // Inlined elements | |
| 718 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); } | |
| 719 address* signature_handler_addr() const { return native_function_addr() + 1; } | |
| 720 | |
| 721 // Garbage collection support | |
| 722 oop* adr_constMethod() const { return (oop*)&_constMethod; } | |
| 723 oop* adr_method_data() const { return (oop*)&_method_data; } | |
| 724 }; | |
| 725 | |
| 726 | |
| 727 // Utility class for compressing line number tables | |
| 728 | |
| 729 class CompressedLineNumberWriteStream: public CompressedWriteStream { | |
| 730 private: | |
| 731 int _bci; | |
| 732 int _line; | |
| 733 public: | |
| 734 // Constructor | |
| 735 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {} | |
| 736 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {} | |
| 737 | |
| 738 // Write (bci, line number) pair to stream | |
| 739 void write_pair_regular(int bci_delta, int line_delta); | |
| 740 | |
| 741 inline void write_pair_inline(int bci, int line) { | |
| 742 int bci_delta = bci - _bci; | |
| 743 int line_delta = line - _line; | |
| 744 _bci = bci; | |
| 745 _line = line; | |
| 746 // Skip (0,0) deltas - they do not add information and conflict with terminator. | |
| 747 if (bci_delta == 0 && line_delta == 0) return; | |
| 748 // Check if bci is 5-bit and line number 3-bit unsigned. | |
| 749 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) { | |
| 750 // Compress into single byte. | |
| 751 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta; | |
| 752 // Check that value doesn't match escape character. | |
| 753 if (value != 0xFF) { | |
| 754 write_byte(value); | |
| 755 return; | |
| 756 } | |
| 757 } | |
| 758 write_pair_regular(bci_delta, line_delta); | |
| 759 } | |
| 760 | |
| 761 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair. | |
| 762 // Disabling optimization doesn't work for methods in header files | |
| 763 // so we force it to call through the non-optimized version in the .cpp. | |
| 764 // It's gross, but it's the only way we can ensure that all callers are | |
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765 // fixed. _MSC_VER is defined by the windows compiler |
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766 #if defined(_M_AMD64) && _MSC_VER >= 1400 |
| 0 | 767 void write_pair(int bci, int line); |
| 768 #else | |
| 769 void write_pair(int bci, int line) { write_pair_inline(bci, line); } | |
| 770 #endif | |
| 771 | |
| 772 // Write end-of-stream marker | |
| 773 void write_terminator() { write_byte(0); } | |
| 774 }; | |
| 775 | |
| 776 | |
| 777 // Utility class for decompressing line number tables | |
| 778 | |
| 779 class CompressedLineNumberReadStream: public CompressedReadStream { | |
| 780 private: | |
| 781 int _bci; | |
| 782 int _line; | |
| 783 public: | |
| 784 // Constructor | |
| 785 CompressedLineNumberReadStream(u_char* buffer); | |
| 786 // Read (bci, line number) pair from stream. Returns false at end-of-stream. | |
| 787 bool read_pair(); | |
| 788 // Accessing bci and line number (after calling read_pair) | |
| 789 int bci() const { return _bci; } | |
| 790 int line() const { return _line; } | |
| 791 }; | |
| 792 | |
| 793 | |
| 794 /// Fast Breakpoints. | |
| 795 | |
| 796 // If this structure gets more complicated (because bpts get numerous), | |
| 797 // move it into its own header. | |
| 798 | |
| 799 // There is presently no provision for concurrent access | |
| 800 // to breakpoint lists, which is only OK for JVMTI because | |
| 801 // breakpoints are written only at safepoints, and are read | |
| 802 // concurrently only outside of safepoints. | |
| 803 | |
| 804 class BreakpointInfo : public CHeapObj { | |
| 805 friend class VMStructs; | |
| 806 private: | |
| 807 Bytecodes::Code _orig_bytecode; | |
| 808 int _bci; | |
| 809 u2 _name_index; // of method | |
| 810 u2 _signature_index; // of method | |
| 811 BreakpointInfo* _next; // simple storage allocation | |
| 812 | |
| 813 public: | |
| 814 BreakpointInfo(methodOop m, int bci); | |
| 815 | |
| 816 // accessors | |
| 817 Bytecodes::Code orig_bytecode() { return _orig_bytecode; } | |
| 818 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; } | |
| 819 int bci() { return _bci; } | |
| 820 | |
| 821 BreakpointInfo* next() const { return _next; } | |
| 822 void set_next(BreakpointInfo* n) { _next = n; } | |
| 823 | |
| 824 // helps for searchers | |
| 2142 | 825 bool match(const methodOopDesc* m, int bci) { |
| 0 | 826 return bci == _bci && match(m); |
| 827 } | |
| 828 | |
| 2142 | 829 bool match(const methodOopDesc* m) { |
| 0 | 830 return _name_index == m->name_index() && |
| 831 _signature_index == m->signature_index(); | |
| 832 } | |
| 833 | |
| 834 void set(methodOop method); | |
| 835 void clear(methodOop method); | |
| 836 }; | |
| 1972 | 837 |
| 838 #endif // SHARE_VM_OOPS_METHODOOP_HPP |