annotate src/share/vm/oops/methodOop.hpp @ 710:e5b0439ef4ae

6655638: dynamic languages need method handles Summary: initial implementation, with known omissions (x86/64, sparc, compiler optim., c-oops, C++ interp.) Reviewed-by: kvn, twisti, never
author jrose
date Wed, 08 Apr 2009 10:56:49 -0700
parents 7bb995fbd3c0
children be93aad57795
rev   line source
duke@0 1 /*
xdono@579 2 * Copyright 1997-2009 Sun Microsystems, Inc. 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 *
duke@0 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@0 20 * CA 95054 USA or visit www.sun.com if you need additional information or
duke@0 21 * have any questions.
duke@0 22 *
duke@0 23 */
duke@0 24
duke@0 25 // A methodOop represents a Java method.
duke@0 26 //
duke@0 27 // Memory layout (each line represents a word). Note that most applications load thousands of methods,
duke@0 28 // so keeping the size of this structure small has a big impact on footprint.
duke@0 29 //
duke@0 30 // We put all oops and method_size first for better gc cache locality.
duke@0 31 //
duke@0 32 // The actual bytecodes are inlined after the end of the methodOopDesc struct.
duke@0 33 //
duke@0 34 // There are bits in the access_flags telling whether inlined tables are present.
duke@0 35 // Note that accessing the line number and local variable tables is not performance critical at all.
duke@0 36 // Accessing the checked exceptions table is used by reflection, so we put that last to make access
duke@0 37 // to it fast.
duke@0 38 //
duke@0 39 // The line number table is compressed and inlined following the byte codes. It is found as the first
duke@0 40 // byte following the byte codes. The checked exceptions table and the local variable table are inlined
duke@0 41 // after the line number table, and indexed from the end of the method. We do not compress the checked
duke@0 42 // exceptions table since the average length is less than 2, and do not bother to compress the local
duke@0 43 // variable table either since it is mostly absent.
duke@0 44 //
duke@0 45 // Note that native_function and signature_handler has to be at fixed offsets (required by the interpreter)
duke@0 46 //
duke@0 47 // |------------------------------------------------------|
duke@0 48 // | header |
duke@0 49 // | klass |
duke@0 50 // |------------------------------------------------------|
duke@0 51 // | constMethodOop (oop) |
duke@0 52 // | constants (oop) |
duke@0 53 // |------------------------------------------------------|
duke@0 54 // | methodData (oop) |
duke@0 55 // | interp_invocation_count |
duke@0 56 // |------------------------------------------------------|
duke@0 57 // | access_flags |
duke@0 58 // | vtable_index |
duke@0 59 // |------------------------------------------------------|
duke@0 60 // | result_index (C++ interpreter only) |
duke@0 61 // |------------------------------------------------------|
duke@0 62 // | method_size | max_stack |
duke@0 63 // | max_locals | size_of_parameters |
duke@0 64 // |------------------------------------------------------|
duke@0 65 // | intrinsic_id, highest_tier | (unused) |
duke@0 66 // |------------------------------------------------------|
duke@0 67 // | throwout_count | num_breakpoints |
duke@0 68 // |------------------------------------------------------|
duke@0 69 // | invocation_counter |
duke@0 70 // | backedge_counter |
duke@0 71 // |------------------------------------------------------|
duke@0 72 // | code (pointer) |
duke@0 73 // | i2i (pointer) |
duke@0 74 // | adapter (pointer) |
duke@0 75 // | from_compiled_entry (pointer) |
duke@0 76 // | from_interpreted_entry (pointer) |
duke@0 77 // |------------------------------------------------------|
duke@0 78 // | native_function (present only if native) |
duke@0 79 // | signature_handler (present only if native) |
duke@0 80 // |------------------------------------------------------|
duke@0 81
duke@0 82
duke@0 83 class CheckedExceptionElement;
duke@0 84 class LocalVariableTableElement;
duke@0 85 class AdapterHandlerEntry;
duke@0 86
duke@0 87 class methodDataOopDesc;
duke@0 88
duke@0 89 class methodOopDesc : public oopDesc {
duke@0 90 friend class methodKlass;
duke@0 91 friend class VMStructs;
duke@0 92 private:
duke@0 93 constMethodOop _constMethod; // Method read-only data.
duke@0 94 constantPoolOop _constants; // Constant pool
duke@0 95 methodDataOop _method_data;
duke@0 96 int _interpreter_invocation_count; // Count of times invoked
duke@0 97 AccessFlags _access_flags; // Access flags
duke@0 98 int _vtable_index; // vtable index of this method (see VtableIndexFlag)
duke@0 99 // note: can have vtables with >2**16 elements (because of inheritance)
duke@0 100 #ifdef CC_INTERP
duke@0 101 int _result_index; // C++ interpreter needs for converting results to/from stack
duke@0 102 #endif
duke@0 103 u2 _method_size; // size of this object
duke@0 104 u2 _max_stack; // Maximum number of entries on the expression stack
duke@0 105 u2 _max_locals; // Number of local variables used by this method
duke@0 106 u2 _size_of_parameters; // size of the parameter block (receiver + arguments) in words
duke@0 107 u1 _intrinsic_id_cache; // Cache for intrinsic_id; 0 or 1+vmInt::ID
duke@0 108 u1 _highest_tier_compile; // Highest compile level this method has ever seen.
duke@0 109 u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting
duke@0 110 u2 _number_of_breakpoints; // fullspeed debugging support
duke@0 111 InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations
duke@0 112 InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations
duke@0 113 #ifndef PRODUCT
duke@0 114 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging)
duke@0 115 #endif
duke@0 116 // Entry point for calling both from and to the interpreter.
duke@0 117 address _i2i_entry; // All-args-on-stack calling convention
duke@0 118 // Adapter blob (i2c/c2i) for this methodOop. Set once when method is linked.
duke@0 119 AdapterHandlerEntry* _adapter;
duke@0 120 // Entry point for calling from compiled code, to compiled code if it exists
duke@0 121 // or else the interpreter.
duke@0 122 volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry()
duke@0 123 // The entry point for calling both from and to compiled code is
duke@0 124 // "_code->entry_point()". Because of tiered compilation and de-opt, this
duke@0 125 // field can come and go. It can transition from NULL to not-null at any
duke@0 126 // time (whenever a compile completes). It can transition from not-null to
duke@0 127 // NULL only at safepoints (because of a de-opt).
duke@0 128 nmethod* volatile _code; // Points to the corresponding piece of native code
duke@0 129 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry
duke@0 130
duke@0 131 public:
jmasa@518 132
jmasa@518 133 static const bool IsUnsafeConc = false;
jmasa@518 134 static const bool IsSafeConc = true;
jmasa@518 135
duke@0 136 // accessors for instance variables
duke@0 137 constMethodOop constMethod() const { return _constMethod; }
duke@0 138 void set_constMethod(constMethodOop xconst) { oop_store_without_check((oop*)&_constMethod, (oop)xconst); }
duke@0 139
duke@0 140
duke@0 141 static address make_adapters(methodHandle mh, TRAPS);
duke@0 142 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); }
duke@0 143 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); }
duke@0 144
duke@0 145 // access flag
duke@0 146 AccessFlags access_flags() const { return _access_flags; }
duke@0 147 void set_access_flags(AccessFlags flags) { _access_flags = flags; }
duke@0 148
duke@0 149 // name
duke@0 150 symbolOop name() const { return _constants->symbol_at(name_index()); }
duke@0 151 int name_index() const { return constMethod()->name_index(); }
duke@0 152 void set_name_index(int index) { constMethod()->set_name_index(index); }
duke@0 153
duke@0 154 // signature
duke@0 155 symbolOop signature() const { return _constants->symbol_at(signature_index()); }
duke@0 156 int signature_index() const { return constMethod()->signature_index(); }
duke@0 157 void set_signature_index(int index) { constMethod()->set_signature_index(index); }
duke@0 158
duke@0 159 // generics support
duke@0 160 symbolOop generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? _constants->symbol_at(idx) : (symbolOop)NULL); }
duke@0 161 int generic_signature_index() const { return constMethod()->generic_signature_index(); }
duke@0 162 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); }
duke@0 163
duke@0 164 // annotations support
duke@0 165 typeArrayOop annotations() const { return instanceKlass::cast(method_holder())->get_method_annotations_of(method_idnum()); }
duke@0 166 typeArrayOop parameter_annotations() const { return instanceKlass::cast(method_holder())->get_method_parameter_annotations_of(method_idnum()); }
duke@0 167 typeArrayOop annotation_default() const { return instanceKlass::cast(method_holder())->get_method_default_annotations_of(method_idnum()); }
duke@0 168
duke@0 169 #ifdef CC_INTERP
duke@0 170 void set_result_index(BasicType type);
duke@0 171 int result_index() { return _result_index; }
duke@0 172 #endif
duke@0 173
duke@0 174 // Helper routine: get klass name + "." + method name + signature as
duke@0 175 // C string, for the purpose of providing more useful NoSuchMethodErrors
duke@0 176 // and fatal error handling. The string is allocated in resource
duke@0 177 // area if a buffer is not provided by the caller.
duke@0 178 char* name_and_sig_as_C_string();
duke@0 179 char* name_and_sig_as_C_string(char* buf, int size);
duke@0 180
duke@0 181 // Static routine in the situations we don't have a methodOop
duke@0 182 static char* name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature);
duke@0 183 static char* name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature, char* buf, int size);
duke@0 184
duke@0 185 // JVMTI breakpoints
duke@0 186 Bytecodes::Code orig_bytecode_at(int bci);
duke@0 187 void set_orig_bytecode_at(int bci, Bytecodes::Code code);
duke@0 188 void set_breakpoint(int bci);
duke@0 189 void clear_breakpoint(int bci);
duke@0 190 void clear_all_breakpoints();
duke@0 191 // Tracking number of breakpoints, for fullspeed debugging.
duke@0 192 // Only mutated by VM thread.
duke@0 193 u2 number_of_breakpoints() const { return _number_of_breakpoints; }
duke@0 194 void incr_number_of_breakpoints() { ++_number_of_breakpoints; }
duke@0 195 void decr_number_of_breakpoints() { --_number_of_breakpoints; }
duke@0 196 // Initialization only
duke@0 197 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; }
duke@0 198
duke@0 199 // index into instanceKlass methods() array
duke@0 200 u2 method_idnum() const { return constMethod()->method_idnum(); }
duke@0 201 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); }
duke@0 202
duke@0 203 // code size
duke@0 204 int code_size() const { return constMethod()->code_size(); }
duke@0 205
duke@0 206 // method size
duke@0 207 int method_size() const { return _method_size; }
duke@0 208 void set_method_size(int size) {
duke@0 209 assert(0 <= size && size < (1 << 16), "invalid method size");
duke@0 210 _method_size = size;
duke@0 211 }
duke@0 212
duke@0 213 // constant pool for klassOop holding this method
duke@0 214 constantPoolOop constants() const { return _constants; }
duke@0 215 void set_constants(constantPoolOop c) { oop_store_without_check((oop*)&_constants, c); }
duke@0 216
duke@0 217 // max stack
duke@0 218 int max_stack() const { return _max_stack; }
duke@0 219 void set_max_stack(int size) { _max_stack = size; }
duke@0 220
duke@0 221 // max locals
duke@0 222 int max_locals() const { return _max_locals; }
duke@0 223 void set_max_locals(int size) { _max_locals = size; }
duke@0 224 int highest_tier_compile() { return _highest_tier_compile;}
duke@0 225 void set_highest_tier_compile(int level) { _highest_tier_compile = level;}
duke@0 226
duke@0 227 void clear_intrinsic_id_cache() { _intrinsic_id_cache = 0; }
duke@0 228
duke@0 229 // Count of times method was exited via exception while interpreting
duke@0 230 void interpreter_throwout_increment() {
duke@0 231 if (_interpreter_throwout_count < 65534) {
duke@0 232 _interpreter_throwout_count++;
duke@0 233 }
duke@0 234 }
duke@0 235
duke@0 236 int interpreter_throwout_count() const { return _interpreter_throwout_count; }
duke@0 237 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; }
duke@0 238
duke@0 239 // size of parameters
duke@0 240 int size_of_parameters() const { return _size_of_parameters; }
duke@0 241
duke@0 242 bool has_stackmap_table() const {
duke@0 243 return constMethod()->has_stackmap_table();
duke@0 244 }
duke@0 245
duke@0 246 typeArrayOop stackmap_data() const {
duke@0 247 return constMethod()->stackmap_data();
duke@0 248 }
duke@0 249
duke@0 250 // exception handler table
duke@0 251 typeArrayOop exception_table() const
duke@0 252 { return constMethod()->exception_table(); }
duke@0 253 void set_exception_table(typeArrayOop e)
duke@0 254 { constMethod()->set_exception_table(e); }
duke@0 255 bool has_exception_handler() const
duke@0 256 { return constMethod()->has_exception_handler(); }
duke@0 257
duke@0 258 // Finds the first entry point bci of an exception handler for an
duke@0 259 // exception of klass ex_klass thrown at throw_bci. A value of NULL
duke@0 260 // for ex_klass indicates that the exception klass is not known; in
duke@0 261 // this case it matches any constraint class. Returns -1 if the
duke@0 262 // exception cannot be handled in this method. The handler
duke@0 263 // constraint classes are loaded if necessary. Note that this may
duke@0 264 // throw an exception if loading of the constraint classes causes
duke@0 265 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError.
duke@0 266 // If an exception is thrown, returns the bci of the
duke@0 267 // exception handler which caused the exception to be thrown, which
duke@0 268 // is needed for proper retries. See, for example,
duke@0 269 // InterpreterRuntime::exception_handler_for_exception.
duke@0 270 int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS);
duke@0 271
duke@0 272 // method data access
duke@0 273 methodDataOop method_data() const {
duke@0 274 return _method_data;
duke@0 275 }
duke@0 276 void set_method_data(methodDataOop data) {
duke@0 277 oop_store_without_check((oop*)&_method_data, (oop)data);
duke@0 278 }
duke@0 279
duke@0 280 // invocation counter
duke@0 281 InvocationCounter* invocation_counter() { return &_invocation_counter; }
duke@0 282 InvocationCounter* backedge_counter() { return &_backedge_counter; }
duke@0 283 int invocation_count() const { return _invocation_counter.count(); }
duke@0 284 int backedge_count() const { return _backedge_counter.count(); }
duke@0 285 bool was_executed_more_than(int n) const;
duke@0 286 bool was_never_executed() const { return !was_executed_more_than(0); }
duke@0 287
duke@0 288 static void build_interpreter_method_data(methodHandle method, TRAPS);
duke@0 289
duke@0 290 int interpreter_invocation_count() const { return _interpreter_invocation_count; }
duke@0 291 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; }
duke@0 292 int increment_interpreter_invocation_count() { return ++_interpreter_invocation_count; }
duke@0 293
duke@0 294 #ifndef PRODUCT
duke@0 295 int compiled_invocation_count() const { return _compiled_invocation_count; }
duke@0 296 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; }
duke@0 297 #endif // not PRODUCT
duke@0 298
twisti@605 299 // Clear (non-shared space) pointers which could not be relevant
duke@0 300 // if this (shared) method were mapped into another JVM.
duke@0 301 void remove_unshareable_info();
duke@0 302
duke@0 303 // nmethod/verified compiler entry
duke@0 304 address verified_code_entry();
duke@0 305 bool check_code() const; // Not inline to avoid circular ref
duke@0 306 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); }
duke@0 307 void clear_code(); // Clear out any compiled code
duke@0 308 void set_code(methodHandle mh, nmethod* code);
duke@0 309 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; }
duke@0 310 address get_i2c_entry();
duke@0 311 address get_c2i_entry();
duke@0 312 address get_c2i_unverified_entry();
duke@0 313 AdapterHandlerEntry* adapter() { return _adapter; }
duke@0 314 // setup entry points
duke@0 315 void link_method(methodHandle method, TRAPS);
duke@0 316 // clear entry points. Used by sharing code
duke@0 317 void unlink_method();
duke@0 318
duke@0 319 // vtable index
duke@0 320 enum VtableIndexFlag {
duke@0 321 // Valid vtable indexes are non-negative (>= 0).
duke@0 322 // These few negative values are used as sentinels.
jrose@710 323 highest_unused_vtable_index_value = -5,
duke@0 324 invalid_vtable_index = -4, // distinct from any valid vtable index
duke@0 325 garbage_vtable_index = -3, // not yet linked; no vtable layout yet
duke@0 326 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch
duke@0 327 // 6330203 Note: Do not use -1, which was overloaded with many meanings.
duke@0 328 };
duke@0 329 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; })
duke@0 330 int vtable_index() const { assert(valid_vtable_index(), "");
duke@0 331 return _vtable_index; }
duke@0 332 void set_vtable_index(int index) { _vtable_index = index; }
duke@0 333
duke@0 334 // interpreter entry
duke@0 335 address interpreter_entry() const { return _i2i_entry; }
duke@0 336 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry
duke@0 337 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; }
duke@0 338 int interpreter_kind(void) {
duke@0 339 return constMethod()->interpreter_kind();
duke@0 340 }
duke@0 341 void set_interpreter_kind();
duke@0 342 void set_interpreter_kind(int kind) {
duke@0 343 constMethod()->set_interpreter_kind(kind);
duke@0 344 }
duke@0 345
duke@0 346 // native function (used for native methods only)
duke@0 347 enum {
duke@0 348 native_bind_event_is_interesting = true
duke@0 349 };
duke@0 350 address native_function() const { return *(native_function_addr()); }
duke@0 351 // Must specify a real function (not NULL).
duke@0 352 // Use clear_native_function() to unregister.
duke@0 353 void set_native_function(address function, bool post_event_flag);
duke@0 354 bool has_native_function() const;
duke@0 355 void clear_native_function();
duke@0 356
duke@0 357 // signature handler (used for native methods only)
duke@0 358 address signature_handler() const { return *(signature_handler_addr()); }
duke@0 359 void set_signature_handler(address handler);
duke@0 360
duke@0 361 // Interpreter oopmap support
duke@0 362 void mask_for(int bci, InterpreterOopMap* mask);
duke@0 363
duke@0 364 #ifndef PRODUCT
duke@0 365 // operations on invocation counter
duke@0 366 void print_invocation_count() const;
duke@0 367 #endif
duke@0 368
duke@0 369 // byte codes
duke@0 370 address code_base() const { return constMethod()->code_base(); }
duke@0 371 bool contains(address bcp) const { return constMethod()->contains(bcp); }
duke@0 372
duke@0 373 // prints byte codes
duke@0 374 void print_codes() const { print_codes_on(tty); }
duke@0 375 void print_codes_on(outputStream* st) const PRODUCT_RETURN;
duke@0 376 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN;
duke@0 377
duke@0 378 // checked exceptions
duke@0 379 int checked_exceptions_length() const
duke@0 380 { return constMethod()->checked_exceptions_length(); }
duke@0 381 CheckedExceptionElement* checked_exceptions_start() const
duke@0 382 { return constMethod()->checked_exceptions_start(); }
duke@0 383
duke@0 384 // localvariable table
duke@0 385 bool has_localvariable_table() const
duke@0 386 { return constMethod()->has_localvariable_table(); }
duke@0 387 int localvariable_table_length() const
duke@0 388 { return constMethod()->localvariable_table_length(); }
duke@0 389 LocalVariableTableElement* localvariable_table_start() const
duke@0 390 { return constMethod()->localvariable_table_start(); }
duke@0 391
duke@0 392 bool has_linenumber_table() const
duke@0 393 { return constMethod()->has_linenumber_table(); }
duke@0 394 u_char* compressed_linenumber_table() const
duke@0 395 { return constMethod()->compressed_linenumber_table(); }
duke@0 396
duke@0 397 // method holder (the klassOop holding this method)
duke@0 398 klassOop method_holder() const { return _constants->pool_holder(); }
duke@0 399
duke@0 400 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments)
duke@0 401 symbolOop klass_name() const; // returns the name of the method holder
duke@0 402 BasicType result_type() const; // type of the method result
duke@0 403 int result_type_index() const; // type index of the method result
duke@0 404 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); }
duke@0 405 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); }
duke@0 406
duke@0 407 // Checked exceptions thrown by this method (resolved to mirrors)
duke@0 408 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); }
duke@0 409
duke@0 410 // Access flags
duke@0 411 bool is_public() const { return access_flags().is_public(); }
duke@0 412 bool is_private() const { return access_flags().is_private(); }
duke@0 413 bool is_protected() const { return access_flags().is_protected(); }
duke@0 414 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); }
duke@0 415 bool is_static() const { return access_flags().is_static(); }
duke@0 416 bool is_final() const { return access_flags().is_final(); }
duke@0 417 bool is_synchronized() const { return access_flags().is_synchronized();}
duke@0 418 bool is_native() const { return access_flags().is_native(); }
duke@0 419 bool is_abstract() const { return access_flags().is_abstract(); }
duke@0 420 bool is_strict() const { return access_flags().is_strict(); }
duke@0 421 bool is_synthetic() const { return access_flags().is_synthetic(); }
duke@0 422
duke@0 423 // returns true if contains only return operation
duke@0 424 bool is_empty_method() const;
duke@0 425
duke@0 426 // returns true if this is a vanilla constructor
duke@0 427 bool is_vanilla_constructor() const;
duke@0 428
duke@0 429 // checks method and its method holder
duke@0 430 bool is_final_method() const;
duke@0 431 bool is_strict_method() const;
duke@0 432
duke@0 433 // true if method needs no dynamic dispatch (final and/or no vtable entry)
duke@0 434 bool can_be_statically_bound() const;
duke@0 435
duke@0 436 // returns true if the method has any backward branches.
duke@0 437 bool has_loops() {
duke@0 438 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag();
duke@0 439 };
duke@0 440
duke@0 441 bool compute_has_loops_flag();
duke@0 442
duke@0 443 bool has_jsrs() {
duke@0 444 return access_flags().has_jsrs();
duke@0 445 };
duke@0 446 void set_has_jsrs() {
duke@0 447 _access_flags.set_has_jsrs();
duke@0 448 }
duke@0 449
duke@0 450 // returns true if the method has any monitors.
duke@0 451 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); }
duke@0 452 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); }
duke@0 453
duke@0 454 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); }
duke@0 455
duke@0 456 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes
duke@0 457 // propererly nest in the method. It might return false, even though they actually nest properly, since the info.
duke@0 458 // has not been computed yet.
duke@0 459 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); }
duke@0 460 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); }
duke@0 461
duke@0 462 // returns true if the method is an accessor function (setter/getter).
duke@0 463 bool is_accessor() const;
duke@0 464
duke@0 465 // returns true if the method is an initializer (<init> or <clinit>).
duke@0 466 bool is_initializer() const;
duke@0 467
duke@0 468 // compiled code support
duke@0 469 // NOTE: code() is inherently racy as deopt can be clearing code
duke@0 470 // simultaneously. Use with caution.
duke@0 471 bool has_compiled_code() const { return code() != NULL; }
duke@0 472
duke@0 473 // sizing
duke@0 474 static int object_size(bool is_native);
duke@0 475 static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; }
duke@0 476 int object_size() const { return method_size(); }
duke@0 477
duke@0 478 bool object_is_parsable() const { return method_size() > 0; }
duke@0 479
duke@0 480 // interpreter support
duke@0 481 static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); }
duke@0 482 static ByteSize constants_offset() { return byte_offset_of(methodOopDesc, _constants ); }
duke@0 483 static ByteSize access_flags_offset() { return byte_offset_of(methodOopDesc, _access_flags ); }
duke@0 484 #ifdef CC_INTERP
duke@0 485 static ByteSize result_index_offset() { return byte_offset_of(methodOopDesc, _result_index ); }
duke@0 486 #endif /* CC_INTERP */
duke@0 487 static ByteSize size_of_locals_offset() { return byte_offset_of(methodOopDesc, _max_locals ); }
duke@0 488 static ByteSize size_of_parameters_offset() { return byte_offset_of(methodOopDesc, _size_of_parameters); }
duke@0 489 static ByteSize from_compiled_offset() { return byte_offset_of(methodOopDesc, _from_compiled_entry); }
duke@0 490 static ByteSize code_offset() { return byte_offset_of(methodOopDesc, _code); }
duke@0 491 static ByteSize invocation_counter_offset() { return byte_offset_of(methodOopDesc, _invocation_counter); }
duke@0 492 static ByteSize backedge_counter_offset() { return byte_offset_of(methodOopDesc, _backedge_counter); }
duke@0 493 static ByteSize method_data_offset() {
duke@0 494 return byte_offset_of(methodOopDesc, _method_data);
duke@0 495 }
duke@0 496 static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); }
duke@0 497 #ifndef PRODUCT
duke@0 498 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); }
duke@0 499 #endif // not PRODUCT
duke@0 500 static ByteSize native_function_offset() { return in_ByteSize(sizeof(methodOopDesc)); }
duke@0 501 static ByteSize from_interpreted_offset() { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); }
duke@0 502 static ByteSize interpreter_entry_offset() { return byte_offset_of(methodOopDesc, _i2i_entry ); }
duke@0 503 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(methodOopDesc) + wordSize); }
duke@0 504 static ByteSize max_stack_offset() { return byte_offset_of(methodOopDesc, _max_stack ); }
duke@0 505
duke@0 506 // for code generation
duke@0 507 static int method_data_offset_in_bytes() { return offset_of(methodOopDesc, _method_data); }
duke@0 508 static int interpreter_invocation_counter_offset_in_bytes()
duke@0 509 { return offset_of(methodOopDesc, _interpreter_invocation_count); }
duke@0 510
duke@0 511 // Static methods that are used to implement member methods where an exposed this pointer
duke@0 512 // is needed due to possible GCs
duke@0 513 static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS);
duke@0 514
duke@0 515 // Returns the byte code index from the byte code pointer
duke@0 516 int bci_from(address bcp) const;
duke@0 517 address bcp_from(int bci) const;
duke@0 518 int validate_bci_from_bcx(intptr_t bcx) const;
duke@0 519
duke@0 520 // Returns the line number for a bci if debugging information for the method is prowided,
duke@0 521 // -1 is returned otherwise.
duke@0 522 int line_number_from_bci(int bci) const;
duke@0 523
duke@0 524 // Reflection support
duke@0 525 bool is_overridden_in(klassOop k) const;
duke@0 526
jrose@710 527 // JSR 292 support
jrose@710 528 bool is_method_handle_invoke() const { return access_flags().is_method_handle_invoke(); }
jrose@710 529 static methodHandle make_invoke_method(KlassHandle holder,
jrose@710 530 symbolHandle signature,
jrose@710 531 Handle method_type,
jrose@710 532 TRAPS);
jrose@710 533 // these operate only on invoke methods:
jrose@710 534 oop method_handle_type() const;
jrose@710 535 static jint* method_type_offsets_chain(); // series of pointer-offsets, terminated by -1
jrose@710 536 // presize interpreter frames for extra interpreter stack entries, if needed
jrose@710 537 static int extra_stack_entries() { return EnableMethodHandles ? (int)MethodHandlePushLimit : 0; }
jrose@710 538 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize()
duke@0 539 // RedefineClasses() support:
duke@0 540 bool is_old() const { return access_flags().is_old(); }
duke@0 541 void set_is_old() { _access_flags.set_is_old(); }
duke@0 542 bool is_obsolete() const { return access_flags().is_obsolete(); }
duke@0 543 void set_is_obsolete() { _access_flags.set_is_obsolete(); }
dcubed@48 544 // see the definition in methodOop.cpp for the gory details
dcubed@48 545 bool should_not_be_cached() const;
duke@0 546
duke@0 547 // JVMTI Native method prefixing support:
duke@0 548 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); }
duke@0 549 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); }
duke@0 550
duke@0 551 // Rewriting support
duke@0 552 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length,
duke@0 553 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS);
duke@0 554
duke@0 555 // Get this method's jmethodID -- allocate if it doesn't exist
duke@0 556 jmethodID jmethod_id() { methodHandle this_h(this);
duke@0 557 return instanceKlass::jmethod_id_for_impl(method_holder(), this_h); }
duke@0 558
duke@0 559 // Lookup the jmethodID for this method. Return NULL if not found.
duke@0 560 // NOTE that this function can be called from a signal handler
duke@0 561 // (see AsyncGetCallTrace support for Forte Analyzer) and this
duke@0 562 // needs to be async-safe. No allocation should be done and
duke@0 563 // so handles are not used to avoid deadlock.
duke@0 564 jmethodID find_jmethod_id_or_null() { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); }
duke@0 565
duke@0 566 // JNI static invoke cached itable index accessors
duke@0 567 int cached_itable_index() { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); }
duke@0 568 void set_cached_itable_index(int index) { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); }
duke@0 569
duke@0 570 // Support for inlining of intrinsic methods
duke@0 571 vmIntrinsics::ID intrinsic_id() const { // returns zero if not an intrinsic
duke@0 572 const u1& cache = _intrinsic_id_cache;
duke@0 573 if (cache != 0) {
duke@0 574 return (vmIntrinsics::ID)(cache - 1);
duke@0 575 } else {
duke@0 576 vmIntrinsics::ID id = compute_intrinsic_id();
duke@0 577 *(u1*)&cache = ((u1) id) + 1; // force the cache to be non-const
duke@0 578 vmIntrinsics::verify_method(id, (methodOop) this);
duke@0 579 assert((vmIntrinsics::ID)(cache - 1) == id, "proper conversion");
duke@0 580 return id;
duke@0 581 }
duke@0 582 }
duke@0 583
duke@0 584 // On-stack replacement support
duke@0 585 bool has_osr_nmethod() { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci) != NULL; }
duke@0 586 nmethod* lookup_osr_nmethod_for(int bci) { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci); }
duke@0 587
duke@0 588 // Inline cache support
duke@0 589 void cleanup_inline_caches();
duke@0 590
duke@0 591 // Find if klass for method is loaded
duke@0 592 bool is_klass_loaded_by_klass_index(int klass_index) const;
duke@0 593 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const;
duke@0 594
duke@0 595 // Indicates whether compilation failed earlier for this method, or
duke@0 596 // whether it is not compilable for another reason like having a
duke@0 597 // breakpoint set in it.
duke@0 598 bool is_not_compilable(int comp_level = CompLevel_highest_tier) const;
duke@0 599 void set_not_compilable(int comp_level = CompLevel_highest_tier);
duke@0 600
duke@0 601 bool is_not_osr_compilable() const { return is_not_compilable() || access_flags().is_not_osr_compilable(); }
duke@0 602 void set_not_osr_compilable() { _access_flags.set_not_osr_compilable(); }
duke@0 603
duke@0 604 bool is_not_tier1_compilable() const { return access_flags().is_not_tier1_compilable(); }
duke@0 605 void set_not_tier1_compilable() { _access_flags.set_not_tier1_compilable(); }
duke@0 606
duke@0 607 // Background compilation support
duke@0 608 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); }
duke@0 609 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); }
duke@0 610 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); }
duke@0 611
duke@0 612 static methodOop method_from_bcp(address bcp);
duke@0 613
duke@0 614 // Resolve all classes in signature, return 'true' if successful
duke@0 615 static bool load_signature_classes(methodHandle m, TRAPS);
duke@0 616
duke@0 617 // Return if true if not all classes references in signature, including return type, has been loaded
duke@0 618 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS);
duke@0 619
duke@0 620 // Printing
duke@0 621 void print_short_name(outputStream* st) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM
duke@0 622 void print_name(outputStream* st) PRODUCT_RETURN; // prints as "virtual void foo(int)"
duke@0 623
duke@0 624 // Helper routine used for method sorting
duke@0 625 static void sort_methods(objArrayOop methods,
duke@0 626 objArrayOop methods_annotations,
duke@0 627 objArrayOop methods_parameter_annotations,
duke@0 628 objArrayOop methods_default_annotations,
duke@0 629 bool idempotent = false);
duke@0 630
duke@0 631 // size of parameters
duke@0 632 void set_size_of_parameters(int size) { _size_of_parameters = size; }
duke@0 633 private:
duke@0 634
duke@0 635 // Helper routine for intrinsic_id().
duke@0 636 vmIntrinsics::ID compute_intrinsic_id() const;
duke@0 637
duke@0 638 // Inlined elements
duke@0 639 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); }
duke@0 640 address* signature_handler_addr() const { return native_function_addr() + 1; }
duke@0 641
duke@0 642 // Garbage collection support
duke@0 643 oop* adr_constMethod() const { return (oop*)&_constMethod; }
duke@0 644 oop* adr_constants() const { return (oop*)&_constants; }
duke@0 645 oop* adr_method_data() const { return (oop*)&_method_data; }
duke@0 646 };
duke@0 647
duke@0 648
duke@0 649 // Utility class for compressing line number tables
duke@0 650
duke@0 651 class CompressedLineNumberWriteStream: public CompressedWriteStream {
duke@0 652 private:
duke@0 653 int _bci;
duke@0 654 int _line;
duke@0 655 public:
duke@0 656 // Constructor
duke@0 657 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {}
duke@0 658 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {}
duke@0 659
duke@0 660 // Write (bci, line number) pair to stream
duke@0 661 void write_pair_regular(int bci_delta, int line_delta);
duke@0 662
duke@0 663 inline void write_pair_inline(int bci, int line) {
duke@0 664 int bci_delta = bci - _bci;
duke@0 665 int line_delta = line - _line;
duke@0 666 _bci = bci;
duke@0 667 _line = line;
duke@0 668 // Skip (0,0) deltas - they do not add information and conflict with terminator.
duke@0 669 if (bci_delta == 0 && line_delta == 0) return;
duke@0 670 // Check if bci is 5-bit and line number 3-bit unsigned.
duke@0 671 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) {
duke@0 672 // Compress into single byte.
duke@0 673 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta;
duke@0 674 // Check that value doesn't match escape character.
duke@0 675 if (value != 0xFF) {
duke@0 676 write_byte(value);
duke@0 677 return;
duke@0 678 }
duke@0 679 }
duke@0 680 write_pair_regular(bci_delta, line_delta);
duke@0 681 }
duke@0 682
duke@0 683 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair.
duke@0 684 // Disabling optimization doesn't work for methods in header files
duke@0 685 // so we force it to call through the non-optimized version in the .cpp.
duke@0 686 // It's gross, but it's the only way we can ensure that all callers are
duke@0 687 // fixed. MSC_VER is defined in build/windows/makefiles/compile.make.
duke@0 688 #if defined(_M_AMD64) && MSC_VER >= 1400
duke@0 689 void write_pair(int bci, int line);
duke@0 690 #else
duke@0 691 void write_pair(int bci, int line) { write_pair_inline(bci, line); }
duke@0 692 #endif
duke@0 693
duke@0 694 // Write end-of-stream marker
duke@0 695 void write_terminator() { write_byte(0); }
duke@0 696 };
duke@0 697
duke@0 698
duke@0 699 // Utility class for decompressing line number tables
duke@0 700
duke@0 701 class CompressedLineNumberReadStream: public CompressedReadStream {
duke@0 702 private:
duke@0 703 int _bci;
duke@0 704 int _line;
duke@0 705 public:
duke@0 706 // Constructor
duke@0 707 CompressedLineNumberReadStream(u_char* buffer);
duke@0 708 // Read (bci, line number) pair from stream. Returns false at end-of-stream.
duke@0 709 bool read_pair();
duke@0 710 // Accessing bci and line number (after calling read_pair)
duke@0 711 int bci() const { return _bci; }
duke@0 712 int line() const { return _line; }
duke@0 713 };
duke@0 714
duke@0 715
duke@0 716 /// Fast Breakpoints.
duke@0 717
duke@0 718 // If this structure gets more complicated (because bpts get numerous),
duke@0 719 // move it into its own header.
duke@0 720
duke@0 721 // There is presently no provision for concurrent access
duke@0 722 // to breakpoint lists, which is only OK for JVMTI because
duke@0 723 // breakpoints are written only at safepoints, and are read
duke@0 724 // concurrently only outside of safepoints.
duke@0 725
duke@0 726 class BreakpointInfo : public CHeapObj {
duke@0 727 friend class VMStructs;
duke@0 728 private:
duke@0 729 Bytecodes::Code _orig_bytecode;
duke@0 730 int _bci;
duke@0 731 u2 _name_index; // of method
duke@0 732 u2 _signature_index; // of method
duke@0 733 BreakpointInfo* _next; // simple storage allocation
duke@0 734
duke@0 735 public:
duke@0 736 BreakpointInfo(methodOop m, int bci);
duke@0 737
duke@0 738 // accessors
duke@0 739 Bytecodes::Code orig_bytecode() { return _orig_bytecode; }
duke@0 740 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; }
duke@0 741 int bci() { return _bci; }
duke@0 742
duke@0 743 BreakpointInfo* next() const { return _next; }
duke@0 744 void set_next(BreakpointInfo* n) { _next = n; }
duke@0 745
duke@0 746 // helps for searchers
duke@0 747 bool match(methodOop m, int bci) {
duke@0 748 return bci == _bci && match(m);
duke@0 749 }
duke@0 750
duke@0 751 bool match(methodOop m) {
duke@0 752 return _name_index == m->name_index() &&
duke@0 753 _signature_index == m->signature_index();
duke@0 754 }
duke@0 755
duke@0 756 void set(methodOop method);
duke@0 757 void clear(methodOop method);
duke@0 758 };