annotate src/share/vm/oops/methodOop.hpp @ 2181:dbad0519a1c4

6845426: non-static <clinit> method with no args is called during the class initialization process Summary: Only call <clinit> with ACC_STATIC for classfiles with version > 50 Reviewed-by: acorn, dholmes, coleenp
author kamg
date Fri, 04 Mar 2011 14:40:46 -0500
parents f77b3ec064b0
children 799d8ccf63cf
rev   line source
duke@0 1 /*
never@2027 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
duke@0 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@0 4 *
duke@0 5 * This code is free software; you can redistribute it and/or modify it
duke@0 6 * under the terms of the GNU General Public License version 2 only, as
duke@0 7 * published by the Free Software Foundation.
duke@0 8 *
duke@0 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@0 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@0 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@0 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@0 13 * accompanied this code).
duke@0 14 *
duke@0 15 * You should have received a copy of the GNU General Public License version
duke@0 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@0 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@0 18 *
trims@1472 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1472 20 * or visit www.oracle.com if you need additional information or have any
trims@1472 21 * questions.
duke@0 22 *
duke@0 23 */
duke@0 24
stefank@1879 25 #ifndef SHARE_VM_OOPS_METHODOOP_HPP
stefank@1879 26 #define SHARE_VM_OOPS_METHODOOP_HPP
stefank@1879 27
stefank@1879 28 #include "classfile/vmSymbols.hpp"
stefank@1879 29 #include "code/compressedStream.hpp"
stefank@1879 30 #include "compiler/oopMap.hpp"
stefank@1879 31 #include "interpreter/invocationCounter.hpp"
stefank@1879 32 #include "oops/constMethodOop.hpp"
stefank@1879 33 #include "oops/constantPoolOop.hpp"
stefank@1879 34 #include "oops/instanceKlass.hpp"
stefank@1879 35 #include "oops/oop.hpp"
stefank@1879 36 #include "oops/typeArrayOop.hpp"
stefank@1879 37 #include "utilities/accessFlags.hpp"
stefank@1879 38 #include "utilities/growableArray.hpp"
stefank@1879 39
duke@0 40 // A methodOop represents a Java method.
duke@0 41 //
duke@0 42 // Memory layout (each line represents a word). Note that most applications load thousands of methods,
duke@0 43 // so keeping the size of this structure small has a big impact on footprint.
duke@0 44 //
duke@0 45 // We put all oops and method_size first for better gc cache locality.
duke@0 46 //
duke@0 47 // The actual bytecodes are inlined after the end of the methodOopDesc struct.
duke@0 48 //
duke@0 49 // There are bits in the access_flags telling whether inlined tables are present.
duke@0 50 // Note that accessing the line number and local variable tables is not performance critical at all.
duke@0 51 // Accessing the checked exceptions table is used by reflection, so we put that last to make access
duke@0 52 // to it fast.
duke@0 53 //
duke@0 54 // The line number table is compressed and inlined following the byte codes. It is found as the first
duke@0 55 // byte following the byte codes. The checked exceptions table and the local variable table are inlined
duke@0 56 // after the line number table, and indexed from the end of the method. We do not compress the checked
duke@0 57 // exceptions table since the average length is less than 2, and do not bother to compress the local
duke@0 58 // variable table either since it is mostly absent.
duke@0 59 //
duke@0 60 // Note that native_function and signature_handler has to be at fixed offsets (required by the interpreter)
duke@0 61 //
duke@0 62 // |------------------------------------------------------|
duke@0 63 // | header |
duke@0 64 // | klass |
duke@0 65 // |------------------------------------------------------|
duke@0 66 // | constMethodOop (oop) |
duke@0 67 // | constants (oop) |
duke@0 68 // |------------------------------------------------------|
duke@0 69 // | methodData (oop) |
duke@0 70 // | interp_invocation_count |
duke@0 71 // |------------------------------------------------------|
duke@0 72 // | access_flags |
duke@0 73 // | vtable_index |
duke@0 74 // |------------------------------------------------------|
duke@0 75 // | result_index (C++ interpreter only) |
duke@0 76 // |------------------------------------------------------|
duke@0 77 // | method_size | max_stack |
duke@0 78 // | max_locals | size_of_parameters |
duke@0 79 // |------------------------------------------------------|
iveresov@1703 80 // | intrinsic_id, (unused) | throwout_count |
duke@0 81 // |------------------------------------------------------|
iveresov@1703 82 // | num_breakpoints | (unused) |
duke@0 83 // |------------------------------------------------------|
duke@0 84 // | invocation_counter |
duke@0 85 // | backedge_counter |
duke@0 86 // |------------------------------------------------------|
duke@0 87 // | code (pointer) |
duke@0 88 // | i2i (pointer) |
duke@0 89 // | adapter (pointer) |
duke@0 90 // | from_compiled_entry (pointer) |
duke@0 91 // | from_interpreted_entry (pointer) |
duke@0 92 // |------------------------------------------------------|
duke@0 93 // | native_function (present only if native) |
duke@0 94 // | signature_handler (present only if native) |
duke@0 95 // |------------------------------------------------------|
duke@0 96
duke@0 97
duke@0 98 class CheckedExceptionElement;
duke@0 99 class LocalVariableTableElement;
duke@0 100 class AdapterHandlerEntry;
duke@0 101 class methodDataOopDesc;
duke@0 102
duke@0 103 class methodOopDesc : public oopDesc {
duke@0 104 friend class methodKlass;
duke@0 105 friend class VMStructs;
duke@0 106 private:
duke@0 107 constMethodOop _constMethod; // Method read-only data.
duke@0 108 constantPoolOop _constants; // Constant pool
duke@0 109 methodDataOop _method_data;
iveresov@1703 110 int _interpreter_invocation_count; // Count of times invoked (reused as prev_event_count in tiered)
duke@0 111 AccessFlags _access_flags; // Access flags
duke@0 112 int _vtable_index; // vtable index of this method (see VtableIndexFlag)
duke@0 113 // note: can have vtables with >2**16 elements (because of inheritance)
duke@0 114 #ifdef CC_INTERP
duke@0 115 int _result_index; // C++ interpreter needs for converting results to/from stack
duke@0 116 #endif
duke@0 117 u2 _method_size; // size of this object
duke@0 118 u2 _max_stack; // Maximum number of entries on the expression stack
duke@0 119 u2 _max_locals; // Number of local variables used by this method
duke@0 120 u2 _size_of_parameters; // size of the parameter block (receiver + arguments) in words
jrose@856 121 u1 _intrinsic_id; // vmSymbols::intrinsic_id (0 == _none)
duke@0 122 u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting
duke@0 123 u2 _number_of_breakpoints; // fullspeed debugging support
duke@0 124 InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations
duke@0 125 InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations
iveresov@1703 126
duke@0 127 #ifndef PRODUCT
duke@0 128 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging)
duke@0 129 #endif
duke@0 130 // Entry point for calling both from and to the interpreter.
duke@0 131 address _i2i_entry; // All-args-on-stack calling convention
duke@0 132 // Adapter blob (i2c/c2i) for this methodOop. Set once when method is linked.
duke@0 133 AdapterHandlerEntry* _adapter;
duke@0 134 // Entry point for calling from compiled code, to compiled code if it exists
duke@0 135 // or else the interpreter.
duke@0 136 volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry()
duke@0 137 // The entry point for calling both from and to compiled code is
duke@0 138 // "_code->entry_point()". Because of tiered compilation and de-opt, this
duke@0 139 // field can come and go. It can transition from NULL to not-null at any
duke@0 140 // time (whenever a compile completes). It can transition from not-null to
duke@0 141 // NULL only at safepoints (because of a de-opt).
duke@0 142 nmethod* volatile _code; // Points to the corresponding piece of native code
duke@0 143 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry
duke@0 144
duke@0 145 public:
jmasa@518 146
duke@0 147 // accessors for instance variables
duke@0 148 constMethodOop constMethod() const { return _constMethod; }
duke@0 149 void set_constMethod(constMethodOop xconst) { oop_store_without_check((oop*)&_constMethod, (oop)xconst); }
duke@0 150
duke@0 151
duke@0 152 static address make_adapters(methodHandle mh, TRAPS);
duke@0 153 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); }
duke@0 154 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); }
duke@0 155
duke@0 156 // access flag
duke@0 157 AccessFlags access_flags() const { return _access_flags; }
duke@0 158 void set_access_flags(AccessFlags flags) { _access_flags = flags; }
duke@0 159
duke@0 160 // name
coleenp@2062 161 Symbol* name() const { return _constants->symbol_at(name_index()); }
duke@0 162 int name_index() const { return constMethod()->name_index(); }
duke@0 163 void set_name_index(int index) { constMethod()->set_name_index(index); }
duke@0 164
duke@0 165 // signature
coleenp@2062 166 Symbol* signature() const { return _constants->symbol_at(signature_index()); }
duke@0 167 int signature_index() const { return constMethod()->signature_index(); }
duke@0 168 void set_signature_index(int index) { constMethod()->set_signature_index(index); }
duke@0 169
duke@0 170 // generics support
coleenp@2062 171 Symbol* generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? _constants->symbol_at(idx) : (Symbol*)NULL); }
duke@0 172 int generic_signature_index() const { return constMethod()->generic_signature_index(); }
duke@0 173 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); }
duke@0 174
duke@0 175 // annotations support
duke@0 176 typeArrayOop annotations() const { return instanceKlass::cast(method_holder())->get_method_annotations_of(method_idnum()); }
duke@0 177 typeArrayOop parameter_annotations() const { return instanceKlass::cast(method_holder())->get_method_parameter_annotations_of(method_idnum()); }
duke@0 178 typeArrayOop annotation_default() const { return instanceKlass::cast(method_holder())->get_method_default_annotations_of(method_idnum()); }
duke@0 179
duke@0 180 #ifdef CC_INTERP
duke@0 181 void set_result_index(BasicType type);
duke@0 182 int result_index() { return _result_index; }
duke@0 183 #endif
duke@0 184
duke@0 185 // Helper routine: get klass name + "." + method name + signature as
duke@0 186 // C string, for the purpose of providing more useful NoSuchMethodErrors
duke@0 187 // and fatal error handling. The string is allocated in resource
duke@0 188 // area if a buffer is not provided by the caller.
duke@0 189 char* name_and_sig_as_C_string();
duke@0 190 char* name_and_sig_as_C_string(char* buf, int size);
duke@0 191
duke@0 192 // Static routine in the situations we don't have a methodOop
coleenp@2062 193 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature);
coleenp@2062 194 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size);
duke@0 195
never@2027 196 Bytecodes::Code java_code_at(int bci) const {
never@2027 197 return Bytecodes::java_code_at(this, bcp_from(bci));
never@2027 198 }
never@2027 199 Bytecodes::Code code_at(int bci) const {
never@2027 200 return Bytecodes::code_at(this, bcp_from(bci));
never@2027 201 }
never@2027 202
duke@0 203 // JVMTI breakpoints
never@2027 204 Bytecodes::Code orig_bytecode_at(int bci) const;
duke@0 205 void set_orig_bytecode_at(int bci, Bytecodes::Code code);
duke@0 206 void set_breakpoint(int bci);
duke@0 207 void clear_breakpoint(int bci);
duke@0 208 void clear_all_breakpoints();
duke@0 209 // Tracking number of breakpoints, for fullspeed debugging.
duke@0 210 // Only mutated by VM thread.
duke@0 211 u2 number_of_breakpoints() const { return _number_of_breakpoints; }
duke@0 212 void incr_number_of_breakpoints() { ++_number_of_breakpoints; }
duke@0 213 void decr_number_of_breakpoints() { --_number_of_breakpoints; }
duke@0 214 // Initialization only
duke@0 215 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; }
duke@0 216
duke@0 217 // index into instanceKlass methods() array
duke@0 218 u2 method_idnum() const { return constMethod()->method_idnum(); }
duke@0 219 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); }
duke@0 220
duke@0 221 // code size
duke@0 222 int code_size() const { return constMethod()->code_size(); }
duke@0 223
duke@0 224 // method size
duke@0 225 int method_size() const { return _method_size; }
duke@0 226 void set_method_size(int size) {
duke@0 227 assert(0 <= size && size < (1 << 16), "invalid method size");
duke@0 228 _method_size = size;
duke@0 229 }
duke@0 230
duke@0 231 // constant pool for klassOop holding this method
duke@0 232 constantPoolOop constants() const { return _constants; }
duke@0 233 void set_constants(constantPoolOop c) { oop_store_without_check((oop*)&_constants, c); }
duke@0 234
duke@0 235 // max stack
duke@0 236 int max_stack() const { return _max_stack; }
duke@0 237 void set_max_stack(int size) { _max_stack = size; }
duke@0 238
duke@0 239 // max locals
duke@0 240 int max_locals() const { return _max_locals; }
duke@0 241 void set_max_locals(int size) { _max_locals = size; }
iveresov@1703 242
iveresov@1703 243 int highest_comp_level() const;
iveresov@1703 244 void set_highest_comp_level(int level);
iveresov@1703 245 int highest_osr_comp_level() const;
iveresov@1703 246 void set_highest_osr_comp_level(int level);
duke@0 247
duke@0 248 // Count of times method was exited via exception while interpreting
duke@0 249 void interpreter_throwout_increment() {
duke@0 250 if (_interpreter_throwout_count < 65534) {
duke@0 251 _interpreter_throwout_count++;
duke@0 252 }
duke@0 253 }
duke@0 254
duke@0 255 int interpreter_throwout_count() const { return _interpreter_throwout_count; }
duke@0 256 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; }
duke@0 257
duke@0 258 // size of parameters
duke@0 259 int size_of_parameters() const { return _size_of_parameters; }
duke@0 260
duke@0 261 bool has_stackmap_table() const {
duke@0 262 return constMethod()->has_stackmap_table();
duke@0 263 }
duke@0 264
duke@0 265 typeArrayOop stackmap_data() const {
duke@0 266 return constMethod()->stackmap_data();
duke@0 267 }
duke@0 268
kamg@1797 269 void set_stackmap_data(typeArrayOop sd) {
kamg@1797 270 constMethod()->set_stackmap_data(sd);
kamg@1797 271 }
kamg@1797 272
duke@0 273 // exception handler table
duke@0 274 typeArrayOop exception_table() const
duke@0 275 { return constMethod()->exception_table(); }
duke@0 276 void set_exception_table(typeArrayOop e)
duke@0 277 { constMethod()->set_exception_table(e); }
duke@0 278 bool has_exception_handler() const
duke@0 279 { return constMethod()->has_exception_handler(); }
duke@0 280
duke@0 281 // Finds the first entry point bci of an exception handler for an
duke@0 282 // exception of klass ex_klass thrown at throw_bci. A value of NULL
duke@0 283 // for ex_klass indicates that the exception klass is not known; in
duke@0 284 // this case it matches any constraint class. Returns -1 if the
duke@0 285 // exception cannot be handled in this method. The handler
duke@0 286 // constraint classes are loaded if necessary. Note that this may
duke@0 287 // throw an exception if loading of the constraint classes causes
duke@0 288 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError.
duke@0 289 // If an exception is thrown, returns the bci of the
duke@0 290 // exception handler which caused the exception to be thrown, which
duke@0 291 // is needed for proper retries. See, for example,
duke@0 292 // InterpreterRuntime::exception_handler_for_exception.
duke@0 293 int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS);
duke@0 294
duke@0 295 // method data access
duke@0 296 methodDataOop method_data() const {
duke@0 297 return _method_data;
duke@0 298 }
duke@0 299 void set_method_data(methodDataOop data) {
duke@0 300 oop_store_without_check((oop*)&_method_data, (oop)data);
duke@0 301 }
duke@0 302
duke@0 303 // invocation counter
iveresov@1703 304 InvocationCounter* invocation_counter() { return &_invocation_counter; }
iveresov@1703 305 InvocationCounter* backedge_counter() { return &_backedge_counter; }
iveresov@1703 306
iveresov@1703 307 int invocation_count();
iveresov@1703 308 int backedge_count();
iveresov@1703 309
iveresov@1703 310 bool was_executed_more_than(int n);
iveresov@1703 311 bool was_never_executed() { return !was_executed_more_than(0); }
duke@0 312
duke@0 313 static void build_interpreter_method_data(methodHandle method, TRAPS);
duke@0 314
iveresov@1703 315 int interpreter_invocation_count() {
iveresov@1703 316 if (TieredCompilation) return invocation_count();
iveresov@1703 317 else return _interpreter_invocation_count;
iveresov@1703 318 }
duke@0 319 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; }
iveresov@1703 320 int increment_interpreter_invocation_count() {
iveresov@1703 321 if (TieredCompilation) ShouldNotReachHere();
iveresov@1703 322 return ++_interpreter_invocation_count;
iveresov@1703 323 }
duke@0 324
duke@0 325 #ifndef PRODUCT
iveresov@1703 326 int compiled_invocation_count() const { return _compiled_invocation_count; }
duke@0 327 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; }
duke@0 328 #endif // not PRODUCT
duke@0 329
twisti@605 330 // Clear (non-shared space) pointers which could not be relevant
duke@0 331 // if this (shared) method were mapped into another JVM.
duke@0 332 void remove_unshareable_info();
duke@0 333
duke@0 334 // nmethod/verified compiler entry
duke@0 335 address verified_code_entry();
duke@0 336 bool check_code() const; // Not inline to avoid circular ref
duke@0 337 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); }
duke@0 338 void clear_code(); // Clear out any compiled code
kvn@1202 339 static void set_code(methodHandle mh, nmethod* code);
duke@0 340 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; }
duke@0 341 address get_i2c_entry();
duke@0 342 address get_c2i_entry();
duke@0 343 address get_c2i_unverified_entry();
duke@0 344 AdapterHandlerEntry* adapter() { return _adapter; }
duke@0 345 // setup entry points
duke@0 346 void link_method(methodHandle method, TRAPS);
duke@0 347 // clear entry points. Used by sharing code
duke@0 348 void unlink_method();
duke@0 349
duke@0 350 // vtable index
duke@0 351 enum VtableIndexFlag {
duke@0 352 // Valid vtable indexes are non-negative (>= 0).
duke@0 353 // These few negative values are used as sentinels.
jrose@710 354 highest_unused_vtable_index_value = -5,
duke@0 355 invalid_vtable_index = -4, // distinct from any valid vtable index
duke@0 356 garbage_vtable_index = -3, // not yet linked; no vtable layout yet
duke@0 357 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch
duke@0 358 // 6330203 Note: Do not use -1, which was overloaded with many meanings.
duke@0 359 };
duke@0 360 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; })
duke@0 361 int vtable_index() const { assert(valid_vtable_index(), "");
duke@0 362 return _vtable_index; }
duke@0 363 void set_vtable_index(int index) { _vtable_index = index; }
duke@0 364
duke@0 365 // interpreter entry
duke@0 366 address interpreter_entry() const { return _i2i_entry; }
duke@0 367 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry
duke@0 368 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; }
duke@0 369 int interpreter_kind(void) {
duke@0 370 return constMethod()->interpreter_kind();
duke@0 371 }
duke@0 372 void set_interpreter_kind();
duke@0 373 void set_interpreter_kind(int kind) {
duke@0 374 constMethod()->set_interpreter_kind(kind);
duke@0 375 }
duke@0 376
duke@0 377 // native function (used for native methods only)
duke@0 378 enum {
duke@0 379 native_bind_event_is_interesting = true
duke@0 380 };
duke@0 381 address native_function() const { return *(native_function_addr()); }
duke@0 382 // Must specify a real function (not NULL).
duke@0 383 // Use clear_native_function() to unregister.
duke@0 384 void set_native_function(address function, bool post_event_flag);
duke@0 385 bool has_native_function() const;
duke@0 386 void clear_native_function();
duke@0 387
duke@0 388 // signature handler (used for native methods only)
duke@0 389 address signature_handler() const { return *(signature_handler_addr()); }
duke@0 390 void set_signature_handler(address handler);
duke@0 391
duke@0 392 // Interpreter oopmap support
duke@0 393 void mask_for(int bci, InterpreterOopMap* mask);
duke@0 394
duke@0 395 #ifndef PRODUCT
duke@0 396 // operations on invocation counter
iveresov@1703 397 void print_invocation_count();
duke@0 398 #endif
duke@0 399
duke@0 400 // byte codes
twisti@1138 401 void set_code(address code) { return constMethod()->set_code(code); }
duke@0 402 address code_base() const { return constMethod()->code_base(); }
duke@0 403 bool contains(address bcp) const { return constMethod()->contains(bcp); }
duke@0 404
duke@0 405 // prints byte codes
duke@0 406 void print_codes() const { print_codes_on(tty); }
duke@0 407 void print_codes_on(outputStream* st) const PRODUCT_RETURN;
duke@0 408 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN;
duke@0 409
duke@0 410 // checked exceptions
duke@0 411 int checked_exceptions_length() const
duke@0 412 { return constMethod()->checked_exceptions_length(); }
duke@0 413 CheckedExceptionElement* checked_exceptions_start() const
duke@0 414 { return constMethod()->checked_exceptions_start(); }
duke@0 415
duke@0 416 // localvariable table
duke@0 417 bool has_localvariable_table() const
duke@0 418 { return constMethod()->has_localvariable_table(); }
duke@0 419 int localvariable_table_length() const
duke@0 420 { return constMethod()->localvariable_table_length(); }
duke@0 421 LocalVariableTableElement* localvariable_table_start() const
duke@0 422 { return constMethod()->localvariable_table_start(); }
duke@0 423
duke@0 424 bool has_linenumber_table() const
duke@0 425 { return constMethod()->has_linenumber_table(); }
duke@0 426 u_char* compressed_linenumber_table() const
duke@0 427 { return constMethod()->compressed_linenumber_table(); }
duke@0 428
duke@0 429 // method holder (the klassOop holding this method)
duke@0 430 klassOop method_holder() const { return _constants->pool_holder(); }
duke@0 431
duke@0 432 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments)
coleenp@2062 433 Symbol* klass_name() const; // returns the name of the method holder
duke@0 434 BasicType result_type() const; // type of the method result
duke@0 435 int result_type_index() const; // type index of the method result
duke@0 436 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); }
duke@0 437 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); }
duke@0 438
duke@0 439 // Checked exceptions thrown by this method (resolved to mirrors)
duke@0 440 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); }
duke@0 441
duke@0 442 // Access flags
duke@0 443 bool is_public() const { return access_flags().is_public(); }
duke@0 444 bool is_private() const { return access_flags().is_private(); }
duke@0 445 bool is_protected() const { return access_flags().is_protected(); }
duke@0 446 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); }
duke@0 447 bool is_static() const { return access_flags().is_static(); }
duke@0 448 bool is_final() const { return access_flags().is_final(); }
duke@0 449 bool is_synchronized() const { return access_flags().is_synchronized();}
duke@0 450 bool is_native() const { return access_flags().is_native(); }
duke@0 451 bool is_abstract() const { return access_flags().is_abstract(); }
duke@0 452 bool is_strict() const { return access_flags().is_strict(); }
duke@0 453 bool is_synthetic() const { return access_flags().is_synthetic(); }
duke@0 454
duke@0 455 // returns true if contains only return operation
duke@0 456 bool is_empty_method() const;
duke@0 457
duke@0 458 // returns true if this is a vanilla constructor
duke@0 459 bool is_vanilla_constructor() const;
duke@0 460
duke@0 461 // checks method and its method holder
duke@0 462 bool is_final_method() const;
duke@0 463 bool is_strict_method() const;
duke@0 464
duke@0 465 // true if method needs no dynamic dispatch (final and/or no vtable entry)
duke@0 466 bool can_be_statically_bound() const;
duke@0 467
duke@0 468 // returns true if the method has any backward branches.
duke@0 469 bool has_loops() {
duke@0 470 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag();
duke@0 471 };
duke@0 472
duke@0 473 bool compute_has_loops_flag();
duke@0 474
duke@0 475 bool has_jsrs() {
duke@0 476 return access_flags().has_jsrs();
duke@0 477 };
duke@0 478 void set_has_jsrs() {
duke@0 479 _access_flags.set_has_jsrs();
duke@0 480 }
duke@0 481
duke@0 482 // returns true if the method has any monitors.
duke@0 483 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); }
duke@0 484 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); }
duke@0 485
duke@0 486 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); }
duke@0 487
duke@0 488 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes
duke@0 489 // propererly nest in the method. It might return false, even though they actually nest properly, since the info.
duke@0 490 // has not been computed yet.
duke@0 491 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); }
duke@0 492 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); }
duke@0 493
duke@0 494 // returns true if the method is an accessor function (setter/getter).
duke@0 495 bool is_accessor() const;
duke@0 496
duke@0 497 // returns true if the method is an initializer (<init> or <clinit>).
duke@0 498 bool is_initializer() const;
duke@0 499
kamg@2181 500 // returns true if the method is static OR if the classfile version < 51
kamg@2181 501 bool has_valid_initializer_flags() const;
kamg@2181 502
kamg@2181 503 // returns true if the method name is <clinit> and the method has
kamg@2181 504 // valid static initializer flags.
kamg@2181 505 bool is_static_initializer() const;
kamg@2181 506
duke@0 507 // compiled code support
duke@0 508 // NOTE: code() is inherently racy as deopt can be clearing code
duke@0 509 // simultaneously. Use with caution.
duke@0 510 bool has_compiled_code() const { return code() != NULL; }
duke@0 511
duke@0 512 // sizing
duke@0 513 static int object_size(bool is_native);
duke@0 514 static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; }
duke@0 515 int object_size() const { return method_size(); }
duke@0 516
duke@0 517 bool object_is_parsable() const { return method_size() > 0; }
duke@0 518
duke@0 519 // interpreter support
duke@0 520 static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); }
duke@0 521 static ByteSize constants_offset() { return byte_offset_of(methodOopDesc, _constants ); }
duke@0 522 static ByteSize access_flags_offset() { return byte_offset_of(methodOopDesc, _access_flags ); }
duke@0 523 #ifdef CC_INTERP
duke@0 524 static ByteSize result_index_offset() { return byte_offset_of(methodOopDesc, _result_index ); }
duke@0 525 #endif /* CC_INTERP */
duke@0 526 static ByteSize size_of_locals_offset() { return byte_offset_of(methodOopDesc, _max_locals ); }
duke@0 527 static ByteSize size_of_parameters_offset() { return byte_offset_of(methodOopDesc, _size_of_parameters); }
duke@0 528 static ByteSize from_compiled_offset() { return byte_offset_of(methodOopDesc, _from_compiled_entry); }
duke@0 529 static ByteSize code_offset() { return byte_offset_of(methodOopDesc, _code); }
duke@0 530 static ByteSize invocation_counter_offset() { return byte_offset_of(methodOopDesc, _invocation_counter); }
duke@0 531 static ByteSize backedge_counter_offset() { return byte_offset_of(methodOopDesc, _backedge_counter); }
duke@0 532 static ByteSize method_data_offset() {
duke@0 533 return byte_offset_of(methodOopDesc, _method_data);
duke@0 534 }
duke@0 535 static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); }
duke@0 536 #ifndef PRODUCT
duke@0 537 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); }
duke@0 538 #endif // not PRODUCT
duke@0 539 static ByteSize native_function_offset() { return in_ByteSize(sizeof(methodOopDesc)); }
duke@0 540 static ByteSize from_interpreted_offset() { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); }
duke@0 541 static ByteSize interpreter_entry_offset() { return byte_offset_of(methodOopDesc, _i2i_entry ); }
duke@0 542 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(methodOopDesc) + wordSize); }
duke@0 543 static ByteSize max_stack_offset() { return byte_offset_of(methodOopDesc, _max_stack ); }
duke@0 544
duke@0 545 // for code generation
duke@0 546 static int method_data_offset_in_bytes() { return offset_of(methodOopDesc, _method_data); }
duke@0 547 static int interpreter_invocation_counter_offset_in_bytes()
duke@0 548 { return offset_of(methodOopDesc, _interpreter_invocation_count); }
jrose@1713 549 static int intrinsic_id_offset_in_bytes() { return offset_of(methodOopDesc, _intrinsic_id); }
jrose@1713 550 static int intrinsic_id_size_in_bytes() { return sizeof(u1); }
duke@0 551
duke@0 552 // Static methods that are used to implement member methods where an exposed this pointer
duke@0 553 // is needed due to possible GCs
duke@0 554 static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS);
duke@0 555
duke@0 556 // Returns the byte code index from the byte code pointer
duke@0 557 int bci_from(address bcp) const;
duke@0 558 address bcp_from(int bci) const;
duke@0 559 int validate_bci_from_bcx(intptr_t bcx) const;
duke@0 560
duke@0 561 // Returns the line number for a bci if debugging information for the method is prowided,
duke@0 562 // -1 is returned otherwise.
duke@0 563 int line_number_from_bci(int bci) const;
duke@0 564
duke@0 565 // Reflection support
duke@0 566 bool is_overridden_in(klassOop k) const;
duke@0 567
jrose@710 568 // JSR 292 support
jrose@710 569 bool is_method_handle_invoke() const { return access_flags().is_method_handle_invoke(); }
jrose@1427 570 static bool is_method_handle_invoke_name(vmSymbols::SID name_sid);
coleenp@2062 571 static bool is_method_handle_invoke_name(Symbol* name) {
jrose@1427 572 return is_method_handle_invoke_name(vmSymbols::find_sid(name));
jrose@1427 573 }
twisti@1152 574 // Tests if this method is an internal adapter frame from the
twisti@1152 575 // MethodHandleCompiler.
twisti@1152 576 bool is_method_handle_adapter() const;
jrose@710 577 static methodHandle make_invoke_method(KlassHandle holder,
coleenp@2062 578 Symbol* name, //invokeExact or invokeGeneric
coleenp@2062 579 Symbol* signature, //anything at all
jrose@710 580 Handle method_type,
jrose@710 581 TRAPS);
jrose@710 582 // these operate only on invoke methods:
jrose@710 583 oop method_handle_type() const;
jrose@710 584 static jint* method_type_offsets_chain(); // series of pointer-offsets, terminated by -1
jrose@710 585 // presize interpreter frames for extra interpreter stack entries, if needed
jrose@726 586 // method handles want to be able to push a few extra values (e.g., a bound receiver), and
jrose@726 587 // invokedynamic sometimes needs to push a bootstrap method, call site, and arglist,
jrose@726 588 // all without checking for a stack overflow
jrose@726 589 static int extra_stack_entries() { return (EnableMethodHandles ? (int)MethodHandlePushLimit : 0) + (EnableInvokeDynamic ? 3 : 0); }
jrose@710 590 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize()
twisti@1152 591
duke@0 592 // RedefineClasses() support:
duke@0 593 bool is_old() const { return access_flags().is_old(); }
duke@0 594 void set_is_old() { _access_flags.set_is_old(); }
duke@0 595 bool is_obsolete() const { return access_flags().is_obsolete(); }
duke@0 596 void set_is_obsolete() { _access_flags.set_is_obsolete(); }
dcubed@48 597 // see the definition in methodOop.cpp for the gory details
dcubed@48 598 bool should_not_be_cached() const;
duke@0 599
duke@0 600 // JVMTI Native method prefixing support:
duke@0 601 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); }
duke@0 602 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); }
duke@0 603
duke@0 604 // Rewriting support
duke@0 605 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length,
duke@0 606 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS);
duke@0 607
duke@0 608 // Get this method's jmethodID -- allocate if it doesn't exist
duke@0 609 jmethodID jmethod_id() { methodHandle this_h(this);
dcubed@977 610 return instanceKlass::get_jmethod_id(method_holder(), this_h); }
duke@0 611
duke@0 612 // Lookup the jmethodID for this method. Return NULL if not found.
duke@0 613 // NOTE that this function can be called from a signal handler
duke@0 614 // (see AsyncGetCallTrace support for Forte Analyzer) and this
duke@0 615 // needs to be async-safe. No allocation should be done and
duke@0 616 // so handles are not used to avoid deadlock.
duke@0 617 jmethodID find_jmethod_id_or_null() { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); }
duke@0 618
duke@0 619 // JNI static invoke cached itable index accessors
duke@0 620 int cached_itable_index() { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); }
duke@0 621 void set_cached_itable_index(int index) { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); }
duke@0 622
duke@0 623 // Support for inlining of intrinsic methods
jrose@856 624 vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; }
jrose@856 625 void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; }
jrose@856 626
jrose@856 627 // Helper routines for intrinsic_id() and vmIntrinsics::method().
jrose@856 628 void init_intrinsic_id(); // updates from _none if a match
jrose@856 629 static vmSymbols::SID klass_id_for_intrinsics(klassOop holder);
duke@0 630
duke@0 631 // On-stack replacement support
iveresov@1703 632 bool has_osr_nmethod(int level, bool match_level) {
iveresov@1703 633 return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL;
iveresov@1703 634 }
iveresov@1703 635
iveresov@1703 636 nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) {
iveresov@1703 637 return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci, level, match_level);
iveresov@1703 638 }
duke@0 639
duke@0 640 // Inline cache support
duke@0 641 void cleanup_inline_caches();
duke@0 642
duke@0 643 // Find if klass for method is loaded
duke@0 644 bool is_klass_loaded_by_klass_index(int klass_index) const;
duke@0 645 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const;
duke@0 646
duke@0 647 // Indicates whether compilation failed earlier for this method, or
duke@0 648 // whether it is not compilable for another reason like having a
duke@0 649 // breakpoint set in it.
iveresov@1703 650 bool is_not_compilable(int comp_level = CompLevel_any) const;
iveresov@1703 651 void set_not_compilable(int comp_level = CompLevel_all, bool report = true);
iveresov@1703 652 void set_not_compilable_quietly(int comp_level = CompLevel_all) {
kvn@1208 653 set_not_compilable(comp_level, false);
kvn@1208 654 }
iveresov@1703 655 bool is_not_osr_compilable(int comp_level = CompLevel_any) const {
iveresov@1703 656 return is_not_compilable(comp_level) || access_flags().is_not_osr_compilable();
iveresov@1703 657 }
iveresov@1703 658 void set_not_osr_compilable() { _access_flags.set_not_osr_compilable(); }
iveresov@1703 659 bool is_not_c1_compilable() const { return access_flags().is_not_c1_compilable(); }
iveresov@1703 660 void set_not_c1_compilable() { _access_flags.set_not_c1_compilable(); }
iveresov@1703 661 bool is_not_c2_compilable() const { return access_flags().is_not_c2_compilable(); }
iveresov@1703 662 void set_not_c2_compilable() { _access_flags.set_not_c2_compilable(); }
duke@0 663
duke@0 664 // Background compilation support
iveresov@1703 665 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); }
iveresov@1703 666 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); }
iveresov@1703 667 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); }
duke@0 668
duke@0 669 // Resolve all classes in signature, return 'true' if successful
duke@0 670 static bool load_signature_classes(methodHandle m, TRAPS);
duke@0 671
duke@0 672 // Return if true if not all classes references in signature, including return type, has been loaded
duke@0 673 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS);
duke@0 674
duke@0 675 // Printing
duke@0 676 void print_short_name(outputStream* st) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM
duke@0 677 void print_name(outputStream* st) PRODUCT_RETURN; // prints as "virtual void foo(int)"
duke@0 678
duke@0 679 // Helper routine used for method sorting
duke@0 680 static void sort_methods(objArrayOop methods,
duke@0 681 objArrayOop methods_annotations,
duke@0 682 objArrayOop methods_parameter_annotations,
duke@0 683 objArrayOop methods_default_annotations,
duke@0 684 bool idempotent = false);
duke@0 685
duke@0 686 // size of parameters
duke@0 687 void set_size_of_parameters(int size) { _size_of_parameters = size; }
duke@0 688 private:
duke@0 689
duke@0 690 // Inlined elements
duke@0 691 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); }
duke@0 692 address* signature_handler_addr() const { return native_function_addr() + 1; }
duke@0 693
duke@0 694 // Garbage collection support
duke@0 695 oop* adr_constMethod() const { return (oop*)&_constMethod; }
duke@0 696 oop* adr_constants() const { return (oop*)&_constants; }
duke@0 697 oop* adr_method_data() const { return (oop*)&_method_data; }
duke@0 698 };
duke@0 699
duke@0 700
duke@0 701 // Utility class for compressing line number tables
duke@0 702
duke@0 703 class CompressedLineNumberWriteStream: public CompressedWriteStream {
duke@0 704 private:
duke@0 705 int _bci;
duke@0 706 int _line;
duke@0 707 public:
duke@0 708 // Constructor
duke@0 709 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {}
duke@0 710 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {}
duke@0 711
duke@0 712 // Write (bci, line number) pair to stream
duke@0 713 void write_pair_regular(int bci_delta, int line_delta);
duke@0 714
duke@0 715 inline void write_pair_inline(int bci, int line) {
duke@0 716 int bci_delta = bci - _bci;
duke@0 717 int line_delta = line - _line;
duke@0 718 _bci = bci;
duke@0 719 _line = line;
duke@0 720 // Skip (0,0) deltas - they do not add information and conflict with terminator.
duke@0 721 if (bci_delta == 0 && line_delta == 0) return;
duke@0 722 // Check if bci is 5-bit and line number 3-bit unsigned.
duke@0 723 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) {
duke@0 724 // Compress into single byte.
duke@0 725 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta;
duke@0 726 // Check that value doesn't match escape character.
duke@0 727 if (value != 0xFF) {
duke@0 728 write_byte(value);
duke@0 729 return;
duke@0 730 }
duke@0 731 }
duke@0 732 write_pair_regular(bci_delta, line_delta);
duke@0 733 }
duke@0 734
duke@0 735 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair.
duke@0 736 // Disabling optimization doesn't work for methods in header files
duke@0 737 // so we force it to call through the non-optimized version in the .cpp.
duke@0 738 // It's gross, but it's the only way we can ensure that all callers are
sla@2105 739 // fixed. _MSC_VER is defined by the windows compiler
sla@2105 740 #if defined(_M_AMD64) && _MSC_VER >= 1400
duke@0 741 void write_pair(int bci, int line);
duke@0 742 #else
duke@0 743 void write_pair(int bci, int line) { write_pair_inline(bci, line); }
duke@0 744 #endif
duke@0 745
duke@0 746 // Write end-of-stream marker
duke@0 747 void write_terminator() { write_byte(0); }
duke@0 748 };
duke@0 749
duke@0 750
duke@0 751 // Utility class for decompressing line number tables
duke@0 752
duke@0 753 class CompressedLineNumberReadStream: public CompressedReadStream {
duke@0 754 private:
duke@0 755 int _bci;
duke@0 756 int _line;
duke@0 757 public:
duke@0 758 // Constructor
duke@0 759 CompressedLineNumberReadStream(u_char* buffer);
duke@0 760 // Read (bci, line number) pair from stream. Returns false at end-of-stream.
duke@0 761 bool read_pair();
duke@0 762 // Accessing bci and line number (after calling read_pair)
duke@0 763 int bci() const { return _bci; }
duke@0 764 int line() const { return _line; }
duke@0 765 };
duke@0 766
duke@0 767
duke@0 768 /// Fast Breakpoints.
duke@0 769
duke@0 770 // If this structure gets more complicated (because bpts get numerous),
duke@0 771 // move it into its own header.
duke@0 772
duke@0 773 // There is presently no provision for concurrent access
duke@0 774 // to breakpoint lists, which is only OK for JVMTI because
duke@0 775 // breakpoints are written only at safepoints, and are read
duke@0 776 // concurrently only outside of safepoints.
duke@0 777
duke@0 778 class BreakpointInfo : public CHeapObj {
duke@0 779 friend class VMStructs;
duke@0 780 private:
duke@0 781 Bytecodes::Code _orig_bytecode;
duke@0 782 int _bci;
duke@0 783 u2 _name_index; // of method
duke@0 784 u2 _signature_index; // of method
duke@0 785 BreakpointInfo* _next; // simple storage allocation
duke@0 786
duke@0 787 public:
duke@0 788 BreakpointInfo(methodOop m, int bci);
duke@0 789
duke@0 790 // accessors
duke@0 791 Bytecodes::Code orig_bytecode() { return _orig_bytecode; }
duke@0 792 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; }
duke@0 793 int bci() { return _bci; }
duke@0 794
duke@0 795 BreakpointInfo* next() const { return _next; }
duke@0 796 void set_next(BreakpointInfo* n) { _next = n; }
duke@0 797
duke@0 798 // helps for searchers
never@2027 799 bool match(const methodOopDesc* m, int bci) {
duke@0 800 return bci == _bci && match(m);
duke@0 801 }
duke@0 802
never@2027 803 bool match(const methodOopDesc* m) {
duke@0 804 return _name_index == m->name_index() &&
duke@0 805 _signature_index == m->signature_index();
duke@0 806 }
duke@0 807
duke@0 808 void set(methodOop method);
duke@0 809 void clear(methodOop method);
duke@0 810 };
stefank@1879 811
stefank@1879 812 #endif // SHARE_VM_OOPS_METHODOOP_HPP