Mercurial > hg > truffle
annotate src/share/vm/oops/methodOop.hpp @ 628:7bb995fbd3c0
Merge
| author | trims |
|---|---|
| date | Thu, 12 Mar 2009 18:16:36 -0700 |
| parents | 0fbdb4381b99 98cb887364d3 |
| children | e5b0439ef4ae |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 579 | 2 * Copyright 1997-2009 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 // A methodOop represents a Java method. | |
| 26 // | |
| 27 // Memory layout (each line represents a word). Note that most applications load thousands of methods, | |
| 28 // so keeping the size of this structure small has a big impact on footprint. | |
| 29 // | |
| 30 // We put all oops and method_size first for better gc cache locality. | |
| 31 // | |
| 32 // The actual bytecodes are inlined after the end of the methodOopDesc struct. | |
| 33 // | |
| 34 // There are bits in the access_flags telling whether inlined tables are present. | |
| 35 // Note that accessing the line number and local variable tables is not performance critical at all. | |
| 36 // Accessing the checked exceptions table is used by reflection, so we put that last to make access | |
| 37 // to it fast. | |
| 38 // | |
| 39 // The line number table is compressed and inlined following the byte codes. It is found as the first | |
| 40 // byte following the byte codes. The checked exceptions table and the local variable table are inlined | |
| 41 // after the line number table, and indexed from the end of the method. We do not compress the checked | |
| 42 // exceptions table since the average length is less than 2, and do not bother to compress the local | |
| 43 // variable table either since it is mostly absent. | |
| 44 // | |
| 45 // Note that native_function and signature_handler has to be at fixed offsets (required by the interpreter) | |
| 46 // | |
| 47 // |------------------------------------------------------| | |
| 48 // | header | | |
| 49 // | klass | | |
| 50 // |------------------------------------------------------| | |
| 51 // | constMethodOop (oop) | | |
| 52 // | constants (oop) | | |
| 53 // |------------------------------------------------------| | |
| 54 // | methodData (oop) | | |
| 55 // | interp_invocation_count | | |
| 56 // |------------------------------------------------------| | |
| 57 // | access_flags | | |
| 58 // | vtable_index | | |
| 59 // |------------------------------------------------------| | |
| 60 // | result_index (C++ interpreter only) | | |
| 61 // |------------------------------------------------------| | |
| 62 // | method_size | max_stack | | |
| 63 // | max_locals | size_of_parameters | | |
| 64 // |------------------------------------------------------| | |
| 65 // | intrinsic_id, highest_tier | (unused) | | |
| 66 // |------------------------------------------------------| | |
| 67 // | throwout_count | num_breakpoints | | |
| 68 // |------------------------------------------------------| | |
| 69 // | invocation_counter | | |
| 70 // | backedge_counter | | |
| 71 // |------------------------------------------------------| | |
| 72 // | code (pointer) | | |
| 73 // | i2i (pointer) | | |
| 74 // | adapter (pointer) | | |
| 75 // | from_compiled_entry (pointer) | | |
| 76 // | from_interpreted_entry (pointer) | | |
| 77 // |------------------------------------------------------| | |
| 78 // | native_function (present only if native) | | |
| 79 // | signature_handler (present only if native) | | |
| 80 // |------------------------------------------------------| | |
| 81 | |
| 82 | |
| 83 class CheckedExceptionElement; | |
| 84 class LocalVariableTableElement; | |
| 85 class AdapterHandlerEntry; | |
| 86 | |
| 87 class methodDataOopDesc; | |
| 88 | |
| 89 class methodOopDesc : public oopDesc { | |
| 90 friend class methodKlass; | |
| 91 friend class VMStructs; | |
| 92 private: | |
| 93 constMethodOop _constMethod; // Method read-only data. | |
| 94 constantPoolOop _constants; // Constant pool | |
| 95 methodDataOop _method_data; | |
| 96 int _interpreter_invocation_count; // Count of times invoked | |
| 97 AccessFlags _access_flags; // Access flags | |
| 98 int _vtable_index; // vtable index of this method (see VtableIndexFlag) | |
| 99 // note: can have vtables with >2**16 elements (because of inheritance) | |
| 100 #ifdef CC_INTERP | |
| 101 int _result_index; // C++ interpreter needs for converting results to/from stack | |
| 102 #endif | |
| 103 u2 _method_size; // size of this object | |
| 104 u2 _max_stack; // Maximum number of entries on the expression stack | |
| 105 u2 _max_locals; // Number of local variables used by this method | |
| 106 u2 _size_of_parameters; // size of the parameter block (receiver + arguments) in words | |
| 107 u1 _intrinsic_id_cache; // Cache for intrinsic_id; 0 or 1+vmInt::ID | |
| 108 u1 _highest_tier_compile; // Highest compile level this method has ever seen. | |
| 109 u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting | |
| 110 u2 _number_of_breakpoints; // fullspeed debugging support | |
| 111 InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations | |
| 112 InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations | |
| 113 #ifndef PRODUCT | |
| 114 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging) | |
| 115 #endif | |
| 116 // Entry point for calling both from and to the interpreter. | |
| 117 address _i2i_entry; // All-args-on-stack calling convention | |
| 118 // Adapter blob (i2c/c2i) for this methodOop. Set once when method is linked. | |
| 119 AdapterHandlerEntry* _adapter; | |
| 120 // Entry point for calling from compiled code, to compiled code if it exists | |
| 121 // or else the interpreter. | |
| 122 volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry() | |
| 123 // The entry point for calling both from and to compiled code is | |
| 124 // "_code->entry_point()". Because of tiered compilation and de-opt, this | |
| 125 // field can come and go. It can transition from NULL to not-null at any | |
| 126 // time (whenever a compile completes). It can transition from not-null to | |
| 127 // NULL only at safepoints (because of a de-opt). | |
| 128 nmethod* volatile _code; // Points to the corresponding piece of native code | |
| 129 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry | |
| 130 | |
| 131 public: | |
|
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132 |
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133 static const bool IsUnsafeConc = false; |
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134 static const bool IsSafeConc = true; |
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135 |
| 0 | 136 // accessors for instance variables |
| 137 constMethodOop constMethod() const { return _constMethod; } | |
| 138 void set_constMethod(constMethodOop xconst) { oop_store_without_check((oop*)&_constMethod, (oop)xconst); } | |
| 139 | |
| 140 | |
| 141 static address make_adapters(methodHandle mh, TRAPS); | |
| 142 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); } | |
| 143 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); } | |
| 144 | |
| 145 // access flag | |
| 146 AccessFlags access_flags() const { return _access_flags; } | |
| 147 void set_access_flags(AccessFlags flags) { _access_flags = flags; } | |
| 148 | |
| 149 // name | |
| 150 symbolOop name() const { return _constants->symbol_at(name_index()); } | |
| 151 int name_index() const { return constMethod()->name_index(); } | |
| 152 void set_name_index(int index) { constMethod()->set_name_index(index); } | |
| 153 | |
| 154 // signature | |
| 155 symbolOop signature() const { return _constants->symbol_at(signature_index()); } | |
| 156 int signature_index() const { return constMethod()->signature_index(); } | |
| 157 void set_signature_index(int index) { constMethod()->set_signature_index(index); } | |
| 158 | |
| 159 // generics support | |
| 160 symbolOop generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? _constants->symbol_at(idx) : (symbolOop)NULL); } | |
| 161 int generic_signature_index() const { return constMethod()->generic_signature_index(); } | |
| 162 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); } | |
| 163 | |
| 164 // annotations support | |
| 165 typeArrayOop annotations() const { return instanceKlass::cast(method_holder())->get_method_annotations_of(method_idnum()); } | |
| 166 typeArrayOop parameter_annotations() const { return instanceKlass::cast(method_holder())->get_method_parameter_annotations_of(method_idnum()); } | |
| 167 typeArrayOop annotation_default() const { return instanceKlass::cast(method_holder())->get_method_default_annotations_of(method_idnum()); } | |
| 168 | |
| 169 #ifdef CC_INTERP | |
| 170 void set_result_index(BasicType type); | |
| 171 int result_index() { return _result_index; } | |
| 172 #endif | |
| 173 | |
| 174 // Helper routine: get klass name + "." + method name + signature as | |
| 175 // C string, for the purpose of providing more useful NoSuchMethodErrors | |
| 176 // and fatal error handling. The string is allocated in resource | |
| 177 // area if a buffer is not provided by the caller. | |
| 178 char* name_and_sig_as_C_string(); | |
| 179 char* name_and_sig_as_C_string(char* buf, int size); | |
| 180 | |
| 181 // Static routine in the situations we don't have a methodOop | |
| 182 static char* name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature); | |
| 183 static char* name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature, char* buf, int size); | |
| 184 | |
| 185 // JVMTI breakpoints | |
| 186 Bytecodes::Code orig_bytecode_at(int bci); | |
| 187 void set_orig_bytecode_at(int bci, Bytecodes::Code code); | |
| 188 void set_breakpoint(int bci); | |
| 189 void clear_breakpoint(int bci); | |
| 190 void clear_all_breakpoints(); | |
| 191 // Tracking number of breakpoints, for fullspeed debugging. | |
| 192 // Only mutated by VM thread. | |
| 193 u2 number_of_breakpoints() const { return _number_of_breakpoints; } | |
| 194 void incr_number_of_breakpoints() { ++_number_of_breakpoints; } | |
| 195 void decr_number_of_breakpoints() { --_number_of_breakpoints; } | |
| 196 // Initialization only | |
| 197 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; } | |
| 198 | |
| 199 // index into instanceKlass methods() array | |
| 200 u2 method_idnum() const { return constMethod()->method_idnum(); } | |
| 201 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); } | |
| 202 | |
| 203 // code size | |
| 204 int code_size() const { return constMethod()->code_size(); } | |
| 205 | |
| 206 // method size | |
| 207 int method_size() const { return _method_size; } | |
| 208 void set_method_size(int size) { | |
| 209 assert(0 <= size && size < (1 << 16), "invalid method size"); | |
| 210 _method_size = size; | |
| 211 } | |
| 212 | |
| 213 // constant pool for klassOop holding this method | |
| 214 constantPoolOop constants() const { return _constants; } | |
| 215 void set_constants(constantPoolOop c) { oop_store_without_check((oop*)&_constants, c); } | |
| 216 | |
| 217 // max stack | |
| 218 int max_stack() const { return _max_stack; } | |
| 219 void set_max_stack(int size) { _max_stack = size; } | |
| 220 | |
| 221 // max locals | |
| 222 int max_locals() const { return _max_locals; } | |
| 223 void set_max_locals(int size) { _max_locals = size; } | |
| 224 int highest_tier_compile() { return _highest_tier_compile;} | |
| 225 void set_highest_tier_compile(int level) { _highest_tier_compile = level;} | |
| 226 | |
| 227 void clear_intrinsic_id_cache() { _intrinsic_id_cache = 0; } | |
| 228 | |
| 229 // Count of times method was exited via exception while interpreting | |
| 230 void interpreter_throwout_increment() { | |
| 231 if (_interpreter_throwout_count < 65534) { | |
| 232 _interpreter_throwout_count++; | |
| 233 } | |
| 234 } | |
| 235 | |
| 236 int interpreter_throwout_count() const { return _interpreter_throwout_count; } | |
| 237 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; } | |
| 238 | |
| 239 // size of parameters | |
| 240 int size_of_parameters() const { return _size_of_parameters; } | |
| 241 | |
| 242 bool has_stackmap_table() const { | |
| 243 return constMethod()->has_stackmap_table(); | |
| 244 } | |
| 245 | |
| 246 typeArrayOop stackmap_data() const { | |
| 247 return constMethod()->stackmap_data(); | |
| 248 } | |
| 249 | |
| 250 // exception handler table | |
| 251 typeArrayOop exception_table() const | |
| 252 { return constMethod()->exception_table(); } | |
| 253 void set_exception_table(typeArrayOop e) | |
| 254 { constMethod()->set_exception_table(e); } | |
| 255 bool has_exception_handler() const | |
| 256 { return constMethod()->has_exception_handler(); } | |
| 257 | |
| 258 // Finds the first entry point bci of an exception handler for an | |
| 259 // exception of klass ex_klass thrown at throw_bci. A value of NULL | |
| 260 // for ex_klass indicates that the exception klass is not known; in | |
| 261 // this case it matches any constraint class. Returns -1 if the | |
| 262 // exception cannot be handled in this method. The handler | |
| 263 // constraint classes are loaded if necessary. Note that this may | |
| 264 // throw an exception if loading of the constraint classes causes | |
| 265 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError. | |
| 266 // If an exception is thrown, returns the bci of the | |
| 267 // exception handler which caused the exception to be thrown, which | |
| 268 // is needed for proper retries. See, for example, | |
| 269 // InterpreterRuntime::exception_handler_for_exception. | |
| 270 int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS); | |
| 271 | |
| 272 // method data access | |
| 273 methodDataOop method_data() const { | |
| 274 return _method_data; | |
| 275 } | |
| 276 void set_method_data(methodDataOop data) { | |
| 277 oop_store_without_check((oop*)&_method_data, (oop)data); | |
| 278 } | |
| 279 | |
| 280 // invocation counter | |
| 281 InvocationCounter* invocation_counter() { return &_invocation_counter; } | |
| 282 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
| 283 int invocation_count() const { return _invocation_counter.count(); } | |
| 284 int backedge_count() const { return _backedge_counter.count(); } | |
| 285 bool was_executed_more_than(int n) const; | |
| 286 bool was_never_executed() const { return !was_executed_more_than(0); } | |
| 287 | |
| 288 static void build_interpreter_method_data(methodHandle method, TRAPS); | |
| 289 | |
| 290 int interpreter_invocation_count() const { return _interpreter_invocation_count; } | |
| 291 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; } | |
| 292 int increment_interpreter_invocation_count() { return ++_interpreter_invocation_count; } | |
| 293 | |
| 294 #ifndef PRODUCT | |
| 295 int compiled_invocation_count() const { return _compiled_invocation_count; } | |
| 296 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; } | |
| 297 #endif // not PRODUCT | |
| 298 | |
| 605 | 299 // Clear (non-shared space) pointers which could not be relevant |
| 0 | 300 // if this (shared) method were mapped into another JVM. |
| 301 void remove_unshareable_info(); | |
| 302 | |
| 303 // nmethod/verified compiler entry | |
| 304 address verified_code_entry(); | |
| 305 bool check_code() const; // Not inline to avoid circular ref | |
| 306 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); } | |
| 307 void clear_code(); // Clear out any compiled code | |
| 308 void set_code(methodHandle mh, nmethod* code); | |
| 309 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; } | |
| 310 address get_i2c_entry(); | |
| 311 address get_c2i_entry(); | |
| 312 address get_c2i_unverified_entry(); | |
| 313 AdapterHandlerEntry* adapter() { return _adapter; } | |
| 314 // setup entry points | |
| 315 void link_method(methodHandle method, TRAPS); | |
| 316 // clear entry points. Used by sharing code | |
| 317 void unlink_method(); | |
| 318 | |
| 319 // vtable index | |
| 320 enum VtableIndexFlag { | |
| 321 // Valid vtable indexes are non-negative (>= 0). | |
| 322 // These few negative values are used as sentinels. | |
| 323 invalid_vtable_index = -4, // distinct from any valid vtable index | |
| 324 garbage_vtable_index = -3, // not yet linked; no vtable layout yet | |
| 325 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch | |
| 326 // 6330203 Note: Do not use -1, which was overloaded with many meanings. | |
| 327 }; | |
| 328 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; }) | |
| 329 int vtable_index() const { assert(valid_vtable_index(), ""); | |
| 330 return _vtable_index; } | |
| 331 void set_vtable_index(int index) { _vtable_index = index; } | |
| 332 | |
| 333 // interpreter entry | |
| 334 address interpreter_entry() const { return _i2i_entry; } | |
| 335 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry | |
| 336 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; } | |
| 337 int interpreter_kind(void) { | |
| 338 return constMethod()->interpreter_kind(); | |
| 339 } | |
| 340 void set_interpreter_kind(); | |
| 341 void set_interpreter_kind(int kind) { | |
| 342 constMethod()->set_interpreter_kind(kind); | |
| 343 } | |
| 344 | |
| 345 // native function (used for native methods only) | |
| 346 enum { | |
| 347 native_bind_event_is_interesting = true | |
| 348 }; | |
| 349 address native_function() const { return *(native_function_addr()); } | |
| 350 // Must specify a real function (not NULL). | |
| 351 // Use clear_native_function() to unregister. | |
| 352 void set_native_function(address function, bool post_event_flag); | |
| 353 bool has_native_function() const; | |
| 354 void clear_native_function(); | |
| 355 | |
| 356 // signature handler (used for native methods only) | |
| 357 address signature_handler() const { return *(signature_handler_addr()); } | |
| 358 void set_signature_handler(address handler); | |
| 359 | |
| 360 // Interpreter oopmap support | |
| 361 void mask_for(int bci, InterpreterOopMap* mask); | |
| 362 | |
| 363 #ifndef PRODUCT | |
| 364 // operations on invocation counter | |
| 365 void print_invocation_count() const; | |
| 366 #endif | |
| 367 | |
| 368 // byte codes | |
| 369 address code_base() const { return constMethod()->code_base(); } | |
| 370 bool contains(address bcp) const { return constMethod()->contains(bcp); } | |
| 371 | |
| 372 // prints byte codes | |
| 373 void print_codes() const { print_codes_on(tty); } | |
| 374 void print_codes_on(outputStream* st) const PRODUCT_RETURN; | |
| 375 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN; | |
| 376 | |
| 377 // checked exceptions | |
| 378 int checked_exceptions_length() const | |
| 379 { return constMethod()->checked_exceptions_length(); } | |
| 380 CheckedExceptionElement* checked_exceptions_start() const | |
| 381 { return constMethod()->checked_exceptions_start(); } | |
| 382 | |
| 383 // localvariable table | |
| 384 bool has_localvariable_table() const | |
| 385 { return constMethod()->has_localvariable_table(); } | |
| 386 int localvariable_table_length() const | |
| 387 { return constMethod()->localvariable_table_length(); } | |
| 388 LocalVariableTableElement* localvariable_table_start() const | |
| 389 { return constMethod()->localvariable_table_start(); } | |
| 390 | |
| 391 bool has_linenumber_table() const | |
| 392 { return constMethod()->has_linenumber_table(); } | |
| 393 u_char* compressed_linenumber_table() const | |
| 394 { return constMethod()->compressed_linenumber_table(); } | |
| 395 | |
| 396 // method holder (the klassOop holding this method) | |
| 397 klassOop method_holder() const { return _constants->pool_holder(); } | |
| 398 | |
| 399 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments) | |
| 400 symbolOop klass_name() const; // returns the name of the method holder | |
| 401 BasicType result_type() const; // type of the method result | |
| 402 int result_type_index() const; // type index of the method result | |
| 403 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); } | |
| 404 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); } | |
| 405 | |
| 406 // Checked exceptions thrown by this method (resolved to mirrors) | |
| 407 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); } | |
| 408 | |
| 409 // Access flags | |
| 410 bool is_public() const { return access_flags().is_public(); } | |
| 411 bool is_private() const { return access_flags().is_private(); } | |
| 412 bool is_protected() const { return access_flags().is_protected(); } | |
| 413 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); } | |
| 414 bool is_static() const { return access_flags().is_static(); } | |
| 415 bool is_final() const { return access_flags().is_final(); } | |
| 416 bool is_synchronized() const { return access_flags().is_synchronized();} | |
| 417 bool is_native() const { return access_flags().is_native(); } | |
| 418 bool is_abstract() const { return access_flags().is_abstract(); } | |
| 419 bool is_strict() const { return access_flags().is_strict(); } | |
| 420 bool is_synthetic() const { return access_flags().is_synthetic(); } | |
| 421 | |
| 422 // returns true if contains only return operation | |
| 423 bool is_empty_method() const; | |
| 424 | |
| 425 // returns true if this is a vanilla constructor | |
| 426 bool is_vanilla_constructor() const; | |
| 427 | |
| 428 // checks method and its method holder | |
| 429 bool is_final_method() const; | |
| 430 bool is_strict_method() const; | |
| 431 | |
| 432 // true if method needs no dynamic dispatch (final and/or no vtable entry) | |
| 433 bool can_be_statically_bound() const; | |
| 434 | |
| 435 // returns true if the method has any backward branches. | |
| 436 bool has_loops() { | |
| 437 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag(); | |
| 438 }; | |
| 439 | |
| 440 bool compute_has_loops_flag(); | |
| 441 | |
| 442 bool has_jsrs() { | |
| 443 return access_flags().has_jsrs(); | |
| 444 }; | |
| 445 void set_has_jsrs() { | |
| 446 _access_flags.set_has_jsrs(); | |
| 447 } | |
| 448 | |
| 449 // returns true if the method has any monitors. | |
| 450 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); } | |
| 451 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); } | |
| 452 | |
| 453 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); } | |
| 454 | |
| 455 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes | |
| 456 // propererly nest in the method. It might return false, even though they actually nest properly, since the info. | |
| 457 // has not been computed yet. | |
| 458 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); } | |
| 459 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); } | |
| 460 | |
| 461 // returns true if the method is an accessor function (setter/getter). | |
| 462 bool is_accessor() const; | |
| 463 | |
| 464 // returns true if the method is an initializer (<init> or <clinit>). | |
| 465 bool is_initializer() const; | |
| 466 | |
| 467 // compiled code support | |
| 468 // NOTE: code() is inherently racy as deopt can be clearing code | |
| 469 // simultaneously. Use with caution. | |
| 470 bool has_compiled_code() const { return code() != NULL; } | |
| 471 | |
| 472 // sizing | |
| 473 static int object_size(bool is_native); | |
| 474 static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; } | |
| 475 int object_size() const { return method_size(); } | |
| 476 | |
| 477 bool object_is_parsable() const { return method_size() > 0; } | |
| 478 | |
| 479 // interpreter support | |
| 480 static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); } | |
| 481 static ByteSize constants_offset() { return byte_offset_of(methodOopDesc, _constants ); } | |
| 482 static ByteSize access_flags_offset() { return byte_offset_of(methodOopDesc, _access_flags ); } | |
| 483 #ifdef CC_INTERP | |
| 484 static ByteSize result_index_offset() { return byte_offset_of(methodOopDesc, _result_index ); } | |
| 485 #endif /* CC_INTERP */ | |
| 486 static ByteSize size_of_locals_offset() { return byte_offset_of(methodOopDesc, _max_locals ); } | |
| 487 static ByteSize size_of_parameters_offset() { return byte_offset_of(methodOopDesc, _size_of_parameters); } | |
| 488 static ByteSize from_compiled_offset() { return byte_offset_of(methodOopDesc, _from_compiled_entry); } | |
| 489 static ByteSize code_offset() { return byte_offset_of(methodOopDesc, _code); } | |
| 490 static ByteSize invocation_counter_offset() { return byte_offset_of(methodOopDesc, _invocation_counter); } | |
| 491 static ByteSize backedge_counter_offset() { return byte_offset_of(methodOopDesc, _backedge_counter); } | |
| 492 static ByteSize method_data_offset() { | |
| 493 return byte_offset_of(methodOopDesc, _method_data); | |
| 494 } | |
| 495 static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); } | |
| 496 #ifndef PRODUCT | |
| 497 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); } | |
| 498 #endif // not PRODUCT | |
| 499 static ByteSize native_function_offset() { return in_ByteSize(sizeof(methodOopDesc)); } | |
| 500 static ByteSize from_interpreted_offset() { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); } | |
| 501 static ByteSize interpreter_entry_offset() { return byte_offset_of(methodOopDesc, _i2i_entry ); } | |
| 502 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(methodOopDesc) + wordSize); } | |
| 503 static ByteSize max_stack_offset() { return byte_offset_of(methodOopDesc, _max_stack ); } | |
| 504 | |
| 505 // for code generation | |
| 506 static int method_data_offset_in_bytes() { return offset_of(methodOopDesc, _method_data); } | |
| 507 static int interpreter_invocation_counter_offset_in_bytes() | |
| 508 { return offset_of(methodOopDesc, _interpreter_invocation_count); } | |
| 509 | |
| 510 // Static methods that are used to implement member methods where an exposed this pointer | |
| 511 // is needed due to possible GCs | |
| 512 static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS); | |
| 513 | |
| 514 // Returns the byte code index from the byte code pointer | |
| 515 int bci_from(address bcp) const; | |
| 516 address bcp_from(int bci) const; | |
| 517 int validate_bci_from_bcx(intptr_t bcx) const; | |
| 518 | |
| 519 // Returns the line number for a bci if debugging information for the method is prowided, | |
| 520 // -1 is returned otherwise. | |
| 521 int line_number_from_bci(int bci) const; | |
| 522 | |
| 523 // Reflection support | |
| 524 bool is_overridden_in(klassOop k) const; | |
| 525 | |
| 526 // RedefineClasses() support: | |
| 527 bool is_old() const { return access_flags().is_old(); } | |
| 528 void set_is_old() { _access_flags.set_is_old(); } | |
| 529 bool is_obsolete() const { return access_flags().is_obsolete(); } | |
| 530 void set_is_obsolete() { _access_flags.set_is_obsolete(); } | |
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531 // see the definition in methodOop.cpp for the gory details |
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532 bool should_not_be_cached() const; |
| 0 | 533 |
| 534 // JVMTI Native method prefixing support: | |
| 535 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); } | |
| 536 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); } | |
| 537 | |
| 538 // Rewriting support | |
| 539 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length, | |
| 540 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS); | |
| 541 | |
| 542 // Get this method's jmethodID -- allocate if it doesn't exist | |
| 543 jmethodID jmethod_id() { methodHandle this_h(this); | |
| 544 return instanceKlass::jmethod_id_for_impl(method_holder(), this_h); } | |
| 545 | |
| 546 // Lookup the jmethodID for this method. Return NULL if not found. | |
| 547 // NOTE that this function can be called from a signal handler | |
| 548 // (see AsyncGetCallTrace support for Forte Analyzer) and this | |
| 549 // needs to be async-safe. No allocation should be done and | |
| 550 // so handles are not used to avoid deadlock. | |
| 551 jmethodID find_jmethod_id_or_null() { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); } | |
| 552 | |
| 553 // JNI static invoke cached itable index accessors | |
| 554 int cached_itable_index() { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); } | |
| 555 void set_cached_itable_index(int index) { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); } | |
| 556 | |
| 557 // Support for inlining of intrinsic methods | |
| 558 vmIntrinsics::ID intrinsic_id() const { // returns zero if not an intrinsic | |
| 559 const u1& cache = _intrinsic_id_cache; | |
| 560 if (cache != 0) { | |
| 561 return (vmIntrinsics::ID)(cache - 1); | |
| 562 } else { | |
| 563 vmIntrinsics::ID id = compute_intrinsic_id(); | |
| 564 *(u1*)&cache = ((u1) id) + 1; // force the cache to be non-const | |
| 565 vmIntrinsics::verify_method(id, (methodOop) this); | |
| 566 assert((vmIntrinsics::ID)(cache - 1) == id, "proper conversion"); | |
| 567 return id; | |
| 568 } | |
| 569 } | |
| 570 | |
| 571 // On-stack replacement support | |
| 572 bool has_osr_nmethod() { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci) != NULL; } | |
| 573 nmethod* lookup_osr_nmethod_for(int bci) { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci); } | |
| 574 | |
| 575 // Inline cache support | |
| 576 void cleanup_inline_caches(); | |
| 577 | |
| 578 // Find if klass for method is loaded | |
| 579 bool is_klass_loaded_by_klass_index(int klass_index) const; | |
| 580 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const; | |
| 581 | |
| 582 // Indicates whether compilation failed earlier for this method, or | |
| 583 // whether it is not compilable for another reason like having a | |
| 584 // breakpoint set in it. | |
| 585 bool is_not_compilable(int comp_level = CompLevel_highest_tier) const; | |
| 586 void set_not_compilable(int comp_level = CompLevel_highest_tier); | |
| 587 | |
| 588 bool is_not_osr_compilable() const { return is_not_compilable() || access_flags().is_not_osr_compilable(); } | |
| 589 void set_not_osr_compilable() { _access_flags.set_not_osr_compilable(); } | |
| 590 | |
| 591 bool is_not_tier1_compilable() const { return access_flags().is_not_tier1_compilable(); } | |
| 592 void set_not_tier1_compilable() { _access_flags.set_not_tier1_compilable(); } | |
| 593 | |
| 594 // Background compilation support | |
| 595 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); } | |
| 596 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); } | |
| 597 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); } | |
| 598 | |
| 599 static methodOop method_from_bcp(address bcp); | |
| 600 | |
| 601 // Resolve all classes in signature, return 'true' if successful | |
| 602 static bool load_signature_classes(methodHandle m, TRAPS); | |
| 603 | |
| 604 // Return if true if not all classes references in signature, including return type, has been loaded | |
| 605 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS); | |
| 606 | |
| 607 // Printing | |
| 608 void print_short_name(outputStream* st) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM | |
| 609 void print_name(outputStream* st) PRODUCT_RETURN; // prints as "virtual void foo(int)" | |
| 610 | |
| 611 // Helper routine used for method sorting | |
| 612 static void sort_methods(objArrayOop methods, | |
| 613 objArrayOop methods_annotations, | |
| 614 objArrayOop methods_parameter_annotations, | |
| 615 objArrayOop methods_default_annotations, | |
| 616 bool idempotent = false); | |
| 617 | |
| 618 // size of parameters | |
| 619 void set_size_of_parameters(int size) { _size_of_parameters = size; } | |
| 620 private: | |
| 621 | |
| 622 // Helper routine for intrinsic_id(). | |
| 623 vmIntrinsics::ID compute_intrinsic_id() const; | |
| 624 | |
| 625 // Inlined elements | |
| 626 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); } | |
| 627 address* signature_handler_addr() const { return native_function_addr() + 1; } | |
| 628 | |
| 629 // Garbage collection support | |
| 630 oop* adr_constMethod() const { return (oop*)&_constMethod; } | |
| 631 oop* adr_constants() const { return (oop*)&_constants; } | |
| 632 oop* adr_method_data() const { return (oop*)&_method_data; } | |
| 633 }; | |
| 634 | |
| 635 | |
| 636 // Utility class for compressing line number tables | |
| 637 | |
| 638 class CompressedLineNumberWriteStream: public CompressedWriteStream { | |
| 639 private: | |
| 640 int _bci; | |
| 641 int _line; | |
| 642 public: | |
| 643 // Constructor | |
| 644 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {} | |
| 645 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {} | |
| 646 | |
| 647 // Write (bci, line number) pair to stream | |
| 648 void write_pair_regular(int bci_delta, int line_delta); | |
| 649 | |
| 650 inline void write_pair_inline(int bci, int line) { | |
| 651 int bci_delta = bci - _bci; | |
| 652 int line_delta = line - _line; | |
| 653 _bci = bci; | |
| 654 _line = line; | |
| 655 // Skip (0,0) deltas - they do not add information and conflict with terminator. | |
| 656 if (bci_delta == 0 && line_delta == 0) return; | |
| 657 // Check if bci is 5-bit and line number 3-bit unsigned. | |
| 658 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) { | |
| 659 // Compress into single byte. | |
| 660 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta; | |
| 661 // Check that value doesn't match escape character. | |
| 662 if (value != 0xFF) { | |
| 663 write_byte(value); | |
| 664 return; | |
| 665 } | |
| 666 } | |
| 667 write_pair_regular(bci_delta, line_delta); | |
| 668 } | |
| 669 | |
| 670 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair. | |
| 671 // Disabling optimization doesn't work for methods in header files | |
| 672 // so we force it to call through the non-optimized version in the .cpp. | |
| 673 // It's gross, but it's the only way we can ensure that all callers are | |
| 674 // fixed. MSC_VER is defined in build/windows/makefiles/compile.make. | |
| 675 #if defined(_M_AMD64) && MSC_VER >= 1400 | |
| 676 void write_pair(int bci, int line); | |
| 677 #else | |
| 678 void write_pair(int bci, int line) { write_pair_inline(bci, line); } | |
| 679 #endif | |
| 680 | |
| 681 // Write end-of-stream marker | |
| 682 void write_terminator() { write_byte(0); } | |
| 683 }; | |
| 684 | |
| 685 | |
| 686 // Utility class for decompressing line number tables | |
| 687 | |
| 688 class CompressedLineNumberReadStream: public CompressedReadStream { | |
| 689 private: | |
| 690 int _bci; | |
| 691 int _line; | |
| 692 public: | |
| 693 // Constructor | |
| 694 CompressedLineNumberReadStream(u_char* buffer); | |
| 695 // Read (bci, line number) pair from stream. Returns false at end-of-stream. | |
| 696 bool read_pair(); | |
| 697 // Accessing bci and line number (after calling read_pair) | |
| 698 int bci() const { return _bci; } | |
| 699 int line() const { return _line; } | |
| 700 }; | |
| 701 | |
| 702 | |
| 703 /// Fast Breakpoints. | |
| 704 | |
| 705 // If this structure gets more complicated (because bpts get numerous), | |
| 706 // move it into its own header. | |
| 707 | |
| 708 // There is presently no provision for concurrent access | |
| 709 // to breakpoint lists, which is only OK for JVMTI because | |
| 710 // breakpoints are written only at safepoints, and are read | |
| 711 // concurrently only outside of safepoints. | |
| 712 | |
| 713 class BreakpointInfo : public CHeapObj { | |
| 714 friend class VMStructs; | |
| 715 private: | |
| 716 Bytecodes::Code _orig_bytecode; | |
| 717 int _bci; | |
| 718 u2 _name_index; // of method | |
| 719 u2 _signature_index; // of method | |
| 720 BreakpointInfo* _next; // simple storage allocation | |
| 721 | |
| 722 public: | |
| 723 BreakpointInfo(methodOop m, int bci); | |
| 724 | |
| 725 // accessors | |
| 726 Bytecodes::Code orig_bytecode() { return _orig_bytecode; } | |
| 727 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; } | |
| 728 int bci() { return _bci; } | |
| 729 | |
| 730 BreakpointInfo* next() const { return _next; } | |
| 731 void set_next(BreakpointInfo* n) { _next = n; } | |
| 732 | |
| 733 // helps for searchers | |
| 734 bool match(methodOop m, int bci) { | |
| 735 return bci == _bci && match(m); | |
| 736 } | |
| 737 | |
| 738 bool match(methodOop m) { | |
| 739 return _name_index == m->name_index() && | |
| 740 _signature_index == m->signature_index(); | |
| 741 } | |
| 742 | |
| 743 void set(methodOop method); | |
| 744 void clear(methodOop method); | |
| 745 }; |