annotate src/share/vm/oops/methodOop.hpp @ 1138:dd57230ba8fe

6893268: additional dynamic language related optimizations in C2 Summary: C2 needs some additional optimizations to be able to handle MethodHandle invokes and invokedynamic instructions at the best performance. Reviewed-by: kvn, never
author twisti
date Tue, 05 Jan 2010 15:21:25 +0100
parents 74a5db69c1fe
children cd37471eaecc
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
jrose@856 107 u1 _intrinsic_id; // vmSymbols::intrinsic_id (0 == _none)
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 // Count of times method was exited via exception while interpreting
duke@0 228 void interpreter_throwout_increment() {
duke@0 229 if (_interpreter_throwout_count < 65534) {
duke@0 230 _interpreter_throwout_count++;
duke@0 231 }
duke@0 232 }
duke@0 233
duke@0 234 int interpreter_throwout_count() const { return _interpreter_throwout_count; }
duke@0 235 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; }
duke@0 236
duke@0 237 // size of parameters
duke@0 238 int size_of_parameters() const { return _size_of_parameters; }
duke@0 239
duke@0 240 bool has_stackmap_table() const {
duke@0 241 return constMethod()->has_stackmap_table();
duke@0 242 }
duke@0 243
duke@0 244 typeArrayOop stackmap_data() const {
duke@0 245 return constMethod()->stackmap_data();
duke@0 246 }
duke@0 247
duke@0 248 // exception handler table
duke@0 249 typeArrayOop exception_table() const
duke@0 250 { return constMethod()->exception_table(); }
duke@0 251 void set_exception_table(typeArrayOop e)
duke@0 252 { constMethod()->set_exception_table(e); }
duke@0 253 bool has_exception_handler() const
duke@0 254 { return constMethod()->has_exception_handler(); }
duke@0 255
duke@0 256 // Finds the first entry point bci of an exception handler for an
duke@0 257 // exception of klass ex_klass thrown at throw_bci. A value of NULL
duke@0 258 // for ex_klass indicates that the exception klass is not known; in
duke@0 259 // this case it matches any constraint class. Returns -1 if the
duke@0 260 // exception cannot be handled in this method. The handler
duke@0 261 // constraint classes are loaded if necessary. Note that this may
duke@0 262 // throw an exception if loading of the constraint classes causes
duke@0 263 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError.
duke@0 264 // If an exception is thrown, returns the bci of the
duke@0 265 // exception handler which caused the exception to be thrown, which
duke@0 266 // is needed for proper retries. See, for example,
duke@0 267 // InterpreterRuntime::exception_handler_for_exception.
duke@0 268 int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS);
duke@0 269
duke@0 270 // method data access
duke@0 271 methodDataOop method_data() const {
duke@0 272 return _method_data;
duke@0 273 }
duke@0 274 void set_method_data(methodDataOop data) {
duke@0 275 oop_store_without_check((oop*)&_method_data, (oop)data);
duke@0 276 }
duke@0 277
duke@0 278 // invocation counter
duke@0 279 InvocationCounter* invocation_counter() { return &_invocation_counter; }
duke@0 280 InvocationCounter* backedge_counter() { return &_backedge_counter; }
duke@0 281 int invocation_count() const { return _invocation_counter.count(); }
duke@0 282 int backedge_count() const { return _backedge_counter.count(); }
duke@0 283 bool was_executed_more_than(int n) const;
duke@0 284 bool was_never_executed() const { return !was_executed_more_than(0); }
duke@0 285
duke@0 286 static void build_interpreter_method_data(methodHandle method, TRAPS);
duke@0 287
duke@0 288 int interpreter_invocation_count() const { return _interpreter_invocation_count; }
duke@0 289 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; }
duke@0 290 int increment_interpreter_invocation_count() { return ++_interpreter_invocation_count; }
duke@0 291
duke@0 292 #ifndef PRODUCT
duke@0 293 int compiled_invocation_count() const { return _compiled_invocation_count; }
duke@0 294 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; }
duke@0 295 #endif // not PRODUCT
duke@0 296
twisti@605 297 // Clear (non-shared space) pointers which could not be relevant
duke@0 298 // if this (shared) method were mapped into another JVM.
duke@0 299 void remove_unshareable_info();
duke@0 300
duke@0 301 // nmethod/verified compiler entry
duke@0 302 address verified_code_entry();
duke@0 303 bool check_code() const; // Not inline to avoid circular ref
duke@0 304 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); }
duke@0 305 void clear_code(); // Clear out any compiled code
duke@0 306 void set_code(methodHandle mh, nmethod* code);
duke@0 307 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; }
duke@0 308 address get_i2c_entry();
duke@0 309 address get_c2i_entry();
duke@0 310 address get_c2i_unverified_entry();
duke@0 311 AdapterHandlerEntry* adapter() { return _adapter; }
duke@0 312 // setup entry points
duke@0 313 void link_method(methodHandle method, TRAPS);
duke@0 314 // clear entry points. Used by sharing code
duke@0 315 void unlink_method();
duke@0 316
duke@0 317 // vtable index
duke@0 318 enum VtableIndexFlag {
duke@0 319 // Valid vtable indexes are non-negative (>= 0).
duke@0 320 // These few negative values are used as sentinels.
jrose@710 321 highest_unused_vtable_index_value = -5,
duke@0 322 invalid_vtable_index = -4, // distinct from any valid vtable index
duke@0 323 garbage_vtable_index = -3, // not yet linked; no vtable layout yet
duke@0 324 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch
duke@0 325 // 6330203 Note: Do not use -1, which was overloaded with many meanings.
duke@0 326 };
duke@0 327 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; })
duke@0 328 int vtable_index() const { assert(valid_vtable_index(), "");
duke@0 329 return _vtable_index; }
duke@0 330 void set_vtable_index(int index) { _vtable_index = index; }
duke@0 331
duke@0 332 // interpreter entry
duke@0 333 address interpreter_entry() const { return _i2i_entry; }
duke@0 334 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry
duke@0 335 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; }
duke@0 336 int interpreter_kind(void) {
duke@0 337 return constMethod()->interpreter_kind();
duke@0 338 }
duke@0 339 void set_interpreter_kind();
duke@0 340 void set_interpreter_kind(int kind) {
duke@0 341 constMethod()->set_interpreter_kind(kind);
duke@0 342 }
duke@0 343
duke@0 344 // native function (used for native methods only)
duke@0 345 enum {
duke@0 346 native_bind_event_is_interesting = true
duke@0 347 };
duke@0 348 address native_function() const { return *(native_function_addr()); }
duke@0 349 // Must specify a real function (not NULL).
duke@0 350 // Use clear_native_function() to unregister.
duke@0 351 void set_native_function(address function, bool post_event_flag);
duke@0 352 bool has_native_function() const;
duke@0 353 void clear_native_function();
duke@0 354
duke@0 355 // signature handler (used for native methods only)
duke@0 356 address signature_handler() const { return *(signature_handler_addr()); }
duke@0 357 void set_signature_handler(address handler);
duke@0 358
duke@0 359 // Interpreter oopmap support
duke@0 360 void mask_for(int bci, InterpreterOopMap* mask);
duke@0 361
duke@0 362 #ifndef PRODUCT
duke@0 363 // operations on invocation counter
duke@0 364 void print_invocation_count() const;
duke@0 365 #endif
duke@0 366
duke@0 367 // byte codes
twisti@1138 368 void set_code(address code) { return constMethod()->set_code(code); }
duke@0 369 address code_base() const { return constMethod()->code_base(); }
duke@0 370 bool contains(address bcp) const { return constMethod()->contains(bcp); }
duke@0 371
duke@0 372 // prints byte codes
duke@0 373 void print_codes() const { print_codes_on(tty); }
duke@0 374 void print_codes_on(outputStream* st) const PRODUCT_RETURN;
duke@0 375 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN;
duke@0 376
duke@0 377 // checked exceptions
duke@0 378 int checked_exceptions_length() const
duke@0 379 { return constMethod()->checked_exceptions_length(); }
duke@0 380 CheckedExceptionElement* checked_exceptions_start() const
duke@0 381 { return constMethod()->checked_exceptions_start(); }
duke@0 382
duke@0 383 // localvariable table
duke@0 384 bool has_localvariable_table() const
duke@0 385 { return constMethod()->has_localvariable_table(); }
duke@0 386 int localvariable_table_length() const
duke@0 387 { return constMethod()->localvariable_table_length(); }
duke@0 388 LocalVariableTableElement* localvariable_table_start() const
duke@0 389 { return constMethod()->localvariable_table_start(); }
duke@0 390
duke@0 391 bool has_linenumber_table() const
duke@0 392 { return constMethod()->has_linenumber_table(); }
duke@0 393 u_char* compressed_linenumber_table() const
duke@0 394 { return constMethod()->compressed_linenumber_table(); }
duke@0 395
duke@0 396 // method holder (the klassOop holding this method)
duke@0 397 klassOop method_holder() const { return _constants->pool_holder(); }
duke@0 398
duke@0 399 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments)
duke@0 400 symbolOop klass_name() const; // returns the name of the method holder
duke@0 401 BasicType result_type() const; // type of the method result
duke@0 402 int result_type_index() const; // type index of the method result
duke@0 403 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); }
duke@0 404 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); }
duke@0 405
duke@0 406 // Checked exceptions thrown by this method (resolved to mirrors)
duke@0 407 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); }
duke@0 408
duke@0 409 // Access flags
duke@0 410 bool is_public() const { return access_flags().is_public(); }
duke@0 411 bool is_private() const { return access_flags().is_private(); }
duke@0 412 bool is_protected() const { return access_flags().is_protected(); }
duke@0 413 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); }
duke@0 414 bool is_static() const { return access_flags().is_static(); }
duke@0 415 bool is_final() const { return access_flags().is_final(); }
duke@0 416 bool is_synchronized() const { return access_flags().is_synchronized();}
duke@0 417 bool is_native() const { return access_flags().is_native(); }
duke@0 418 bool is_abstract() const { return access_flags().is_abstract(); }
duke@0 419 bool is_strict() const { return access_flags().is_strict(); }
duke@0 420 bool is_synthetic() const { return access_flags().is_synthetic(); }
duke@0 421
duke@0 422 // returns true if contains only return operation
duke@0 423 bool is_empty_method() const;
duke@0 424
duke@0 425 // returns true if this is a vanilla constructor
duke@0 426 bool is_vanilla_constructor() const;
duke@0 427
duke@0 428 // checks method and its method holder
duke@0 429 bool is_final_method() const;
duke@0 430 bool is_strict_method() const;
duke@0 431
duke@0 432 // true if method needs no dynamic dispatch (final and/or no vtable entry)
duke@0 433 bool can_be_statically_bound() const;
duke@0 434
duke@0 435 // returns true if the method has any backward branches.
duke@0 436 bool has_loops() {
duke@0 437 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag();
duke@0 438 };
duke@0 439
duke@0 440 bool compute_has_loops_flag();
duke@0 441
duke@0 442 bool has_jsrs() {
duke@0 443 return access_flags().has_jsrs();
duke@0 444 };
duke@0 445 void set_has_jsrs() {
duke@0 446 _access_flags.set_has_jsrs();
duke@0 447 }
duke@0 448
duke@0 449 // returns true if the method has any monitors.
duke@0 450 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); }
duke@0 451 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); }
duke@0 452
duke@0 453 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); }
duke@0 454
duke@0 455 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes
duke@0 456 // propererly nest in the method. It might return false, even though they actually nest properly, since the info.
duke@0 457 // has not been computed yet.
duke@0 458 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); }
duke@0 459 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); }
duke@0 460
duke@0 461 // returns true if the method is an accessor function (setter/getter).
duke@0 462 bool is_accessor() const;
duke@0 463
duke@0 464 // returns true if the method is an initializer (<init> or <clinit>).
duke@0 465 bool is_initializer() const;
duke@0 466
duke@0 467 // compiled code support
duke@0 468 // NOTE: code() is inherently racy as deopt can be clearing code
duke@0 469 // simultaneously. Use with caution.
duke@0 470 bool has_compiled_code() const { return code() != NULL; }
duke@0 471
duke@0 472 // sizing
duke@0 473 static int object_size(bool is_native);
duke@0 474 static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; }
duke@0 475 int object_size() const { return method_size(); }
duke@0 476
duke@0 477 bool object_is_parsable() const { return method_size() > 0; }
duke@0 478
duke@0 479 // interpreter support
duke@0 480 static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); }
duke@0 481 static ByteSize constants_offset() { return byte_offset_of(methodOopDesc, _constants ); }
duke@0 482 static ByteSize access_flags_offset() { return byte_offset_of(methodOopDesc, _access_flags ); }
duke@0 483 #ifdef CC_INTERP
duke@0 484 static ByteSize result_index_offset() { return byte_offset_of(methodOopDesc, _result_index ); }
duke@0 485 #endif /* CC_INTERP */
duke@0 486 static ByteSize size_of_locals_offset() { return byte_offset_of(methodOopDesc, _max_locals ); }
duke@0 487 static ByteSize size_of_parameters_offset() { return byte_offset_of(methodOopDesc, _size_of_parameters); }
duke@0 488 static ByteSize from_compiled_offset() { return byte_offset_of(methodOopDesc, _from_compiled_entry); }
duke@0 489 static ByteSize code_offset() { return byte_offset_of(methodOopDesc, _code); }
duke@0 490 static ByteSize invocation_counter_offset() { return byte_offset_of(methodOopDesc, _invocation_counter); }
duke@0 491 static ByteSize backedge_counter_offset() { return byte_offset_of(methodOopDesc, _backedge_counter); }
duke@0 492 static ByteSize method_data_offset() {
duke@0 493 return byte_offset_of(methodOopDesc, _method_data);
duke@0 494 }
duke@0 495 static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); }
duke@0 496 #ifndef PRODUCT
duke@0 497 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); }
duke@0 498 #endif // not PRODUCT
duke@0 499 static ByteSize native_function_offset() { return in_ByteSize(sizeof(methodOopDesc)); }
duke@0 500 static ByteSize from_interpreted_offset() { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); }
duke@0 501 static ByteSize interpreter_entry_offset() { return byte_offset_of(methodOopDesc, _i2i_entry ); }
duke@0 502 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(methodOopDesc) + wordSize); }
duke@0 503 static ByteSize max_stack_offset() { return byte_offset_of(methodOopDesc, _max_stack ); }
duke@0 504
duke@0 505 // for code generation
duke@0 506 static int method_data_offset_in_bytes() { return offset_of(methodOopDesc, _method_data); }
duke@0 507 static int interpreter_invocation_counter_offset_in_bytes()
duke@0 508 { return offset_of(methodOopDesc, _interpreter_invocation_count); }
duke@0 509
duke@0 510 // Static methods that are used to implement member methods where an exposed this pointer
duke@0 511 // is needed due to possible GCs
duke@0 512 static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS);
duke@0 513
duke@0 514 // Returns the byte code index from the byte code pointer
duke@0 515 int bci_from(address bcp) const;
duke@0 516 address bcp_from(int bci) const;
duke@0 517 int validate_bci_from_bcx(intptr_t bcx) const;
duke@0 518
duke@0 519 // Returns the line number for a bci if debugging information for the method is prowided,
duke@0 520 // -1 is returned otherwise.
duke@0 521 int line_number_from_bci(int bci) const;
duke@0 522
duke@0 523 // Reflection support
duke@0 524 bool is_overridden_in(klassOop k) const;
duke@0 525
jrose@710 526 // JSR 292 support
jrose@710 527 bool is_method_handle_invoke() const { return access_flags().is_method_handle_invoke(); }
jrose@710 528 static methodHandle make_invoke_method(KlassHandle holder,
jrose@710 529 symbolHandle signature,
jrose@710 530 Handle method_type,
jrose@710 531 TRAPS);
jrose@710 532 // these operate only on invoke methods:
jrose@710 533 oop method_handle_type() const;
jrose@710 534 static jint* method_type_offsets_chain(); // series of pointer-offsets, terminated by -1
jrose@710 535 // presize interpreter frames for extra interpreter stack entries, if needed
jrose@726 536 // method handles want to be able to push a few extra values (e.g., a bound receiver), and
jrose@726 537 // invokedynamic sometimes needs to push a bootstrap method, call site, and arglist,
jrose@726 538 // all without checking for a stack overflow
jrose@726 539 static int extra_stack_entries() { return (EnableMethodHandles ? (int)MethodHandlePushLimit : 0) + (EnableInvokeDynamic ? 3 : 0); }
jrose@710 540 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize()
duke@0 541 // RedefineClasses() support:
duke@0 542 bool is_old() const { return access_flags().is_old(); }
duke@0 543 void set_is_old() { _access_flags.set_is_old(); }
duke@0 544 bool is_obsolete() const { return access_flags().is_obsolete(); }
duke@0 545 void set_is_obsolete() { _access_flags.set_is_obsolete(); }
dcubed@48 546 // see the definition in methodOop.cpp for the gory details
dcubed@48 547 bool should_not_be_cached() const;
duke@0 548
duke@0 549 // JVMTI Native method prefixing support:
duke@0 550 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); }
duke@0 551 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); }
duke@0 552
duke@0 553 // Rewriting support
duke@0 554 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length,
duke@0 555 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS);
duke@0 556
duke@0 557 // Get this method's jmethodID -- allocate if it doesn't exist
duke@0 558 jmethodID jmethod_id() { methodHandle this_h(this);
dcubed@977 559 return instanceKlass::get_jmethod_id(method_holder(), this_h); }
duke@0 560
duke@0 561 // Lookup the jmethodID for this method. Return NULL if not found.
duke@0 562 // NOTE that this function can be called from a signal handler
duke@0 563 // (see AsyncGetCallTrace support for Forte Analyzer) and this
duke@0 564 // needs to be async-safe. No allocation should be done and
duke@0 565 // so handles are not used to avoid deadlock.
duke@0 566 jmethodID find_jmethod_id_or_null() { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); }
duke@0 567
duke@0 568 // JNI static invoke cached itable index accessors
duke@0 569 int cached_itable_index() { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); }
duke@0 570 void set_cached_itable_index(int index) { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); }
duke@0 571
duke@0 572 // Support for inlining of intrinsic methods
jrose@856 573 vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; }
jrose@856 574 void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; }
jrose@856 575
jrose@856 576 // Helper routines for intrinsic_id() and vmIntrinsics::method().
jrose@856 577 void init_intrinsic_id(); // updates from _none if a match
jrose@856 578 static vmSymbols::SID klass_id_for_intrinsics(klassOop holder);
duke@0 579
duke@0 580 // On-stack replacement support
duke@0 581 bool has_osr_nmethod() { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci) != NULL; }
duke@0 582 nmethod* lookup_osr_nmethod_for(int bci) { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci); }
duke@0 583
duke@0 584 // Inline cache support
duke@0 585 void cleanup_inline_caches();
duke@0 586
duke@0 587 // Find if klass for method is loaded
duke@0 588 bool is_klass_loaded_by_klass_index(int klass_index) const;
duke@0 589 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const;
duke@0 590
duke@0 591 // Indicates whether compilation failed earlier for this method, or
duke@0 592 // whether it is not compilable for another reason like having a
duke@0 593 // breakpoint set in it.
duke@0 594 bool is_not_compilable(int comp_level = CompLevel_highest_tier) const;
duke@0 595 void set_not_compilable(int comp_level = CompLevel_highest_tier);
duke@0 596
duke@0 597 bool is_not_osr_compilable() const { return is_not_compilable() || access_flags().is_not_osr_compilable(); }
duke@0 598 void set_not_osr_compilable() { _access_flags.set_not_osr_compilable(); }
duke@0 599
duke@0 600 bool is_not_tier1_compilable() const { return access_flags().is_not_tier1_compilable(); }
duke@0 601 void set_not_tier1_compilable() { _access_flags.set_not_tier1_compilable(); }
duke@0 602
duke@0 603 // Background compilation support
duke@0 604 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); }
duke@0 605 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); }
duke@0 606 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); }
duke@0 607
duke@0 608 static methodOop method_from_bcp(address bcp);
duke@0 609
duke@0 610 // Resolve all classes in signature, return 'true' if successful
duke@0 611 static bool load_signature_classes(methodHandle m, TRAPS);
duke@0 612
duke@0 613 // Return if true if not all classes references in signature, including return type, has been loaded
duke@0 614 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS);
duke@0 615
duke@0 616 // Printing
duke@0 617 void print_short_name(outputStream* st) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM
duke@0 618 void print_name(outputStream* st) PRODUCT_RETURN; // prints as "virtual void foo(int)"
duke@0 619
duke@0 620 // Helper routine used for method sorting
duke@0 621 static void sort_methods(objArrayOop methods,
duke@0 622 objArrayOop methods_annotations,
duke@0 623 objArrayOop methods_parameter_annotations,
duke@0 624 objArrayOop methods_default_annotations,
duke@0 625 bool idempotent = false);
duke@0 626
duke@0 627 // size of parameters
duke@0 628 void set_size_of_parameters(int size) { _size_of_parameters = size; }
duke@0 629 private:
duke@0 630
duke@0 631 // Inlined elements
duke@0 632 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); }
duke@0 633 address* signature_handler_addr() const { return native_function_addr() + 1; }
duke@0 634
duke@0 635 // Garbage collection support
duke@0 636 oop* adr_constMethod() const { return (oop*)&_constMethod; }
duke@0 637 oop* adr_constants() const { return (oop*)&_constants; }
duke@0 638 oop* adr_method_data() const { return (oop*)&_method_data; }
duke@0 639 };
duke@0 640
duke@0 641
duke@0 642 // Utility class for compressing line number tables
duke@0 643
duke@0 644 class CompressedLineNumberWriteStream: public CompressedWriteStream {
duke@0 645 private:
duke@0 646 int _bci;
duke@0 647 int _line;
duke@0 648 public:
duke@0 649 // Constructor
duke@0 650 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {}
duke@0 651 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {}
duke@0 652
duke@0 653 // Write (bci, line number) pair to stream
duke@0 654 void write_pair_regular(int bci_delta, int line_delta);
duke@0 655
duke@0 656 inline void write_pair_inline(int bci, int line) {
duke@0 657 int bci_delta = bci - _bci;
duke@0 658 int line_delta = line - _line;
duke@0 659 _bci = bci;
duke@0 660 _line = line;
duke@0 661 // Skip (0,0) deltas - they do not add information and conflict with terminator.
duke@0 662 if (bci_delta == 0 && line_delta == 0) return;
duke@0 663 // Check if bci is 5-bit and line number 3-bit unsigned.
duke@0 664 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) {
duke@0 665 // Compress into single byte.
duke@0 666 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta;
duke@0 667 // Check that value doesn't match escape character.
duke@0 668 if (value != 0xFF) {
duke@0 669 write_byte(value);
duke@0 670 return;
duke@0 671 }
duke@0 672 }
duke@0 673 write_pair_regular(bci_delta, line_delta);
duke@0 674 }
duke@0 675
duke@0 676 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair.
duke@0 677 // Disabling optimization doesn't work for methods in header files
duke@0 678 // so we force it to call through the non-optimized version in the .cpp.
duke@0 679 // It's gross, but it's the only way we can ensure that all callers are
duke@0 680 // fixed. MSC_VER is defined in build/windows/makefiles/compile.make.
duke@0 681 #if defined(_M_AMD64) && MSC_VER >= 1400
duke@0 682 void write_pair(int bci, int line);
duke@0 683 #else
duke@0 684 void write_pair(int bci, int line) { write_pair_inline(bci, line); }
duke@0 685 #endif
duke@0 686
duke@0 687 // Write end-of-stream marker
duke@0 688 void write_terminator() { write_byte(0); }
duke@0 689 };
duke@0 690
duke@0 691
duke@0 692 // Utility class for decompressing line number tables
duke@0 693
duke@0 694 class CompressedLineNumberReadStream: public CompressedReadStream {
duke@0 695 private:
duke@0 696 int _bci;
duke@0 697 int _line;
duke@0 698 public:
duke@0 699 // Constructor
duke@0 700 CompressedLineNumberReadStream(u_char* buffer);
duke@0 701 // Read (bci, line number) pair from stream. Returns false at end-of-stream.
duke@0 702 bool read_pair();
duke@0 703 // Accessing bci and line number (after calling read_pair)
duke@0 704 int bci() const { return _bci; }
duke@0 705 int line() const { return _line; }
duke@0 706 };
duke@0 707
duke@0 708
duke@0 709 /// Fast Breakpoints.
duke@0 710
duke@0 711 // If this structure gets more complicated (because bpts get numerous),
duke@0 712 // move it into its own header.
duke@0 713
duke@0 714 // There is presently no provision for concurrent access
duke@0 715 // to breakpoint lists, which is only OK for JVMTI because
duke@0 716 // breakpoints are written only at safepoints, and are read
duke@0 717 // concurrently only outside of safepoints.
duke@0 718
duke@0 719 class BreakpointInfo : public CHeapObj {
duke@0 720 friend class VMStructs;
duke@0 721 private:
duke@0 722 Bytecodes::Code _orig_bytecode;
duke@0 723 int _bci;
duke@0 724 u2 _name_index; // of method
duke@0 725 u2 _signature_index; // of method
duke@0 726 BreakpointInfo* _next; // simple storage allocation
duke@0 727
duke@0 728 public:
duke@0 729 BreakpointInfo(methodOop m, int bci);
duke@0 730
duke@0 731 // accessors
duke@0 732 Bytecodes::Code orig_bytecode() { return _orig_bytecode; }
duke@0 733 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; }
duke@0 734 int bci() { return _bci; }
duke@0 735
duke@0 736 BreakpointInfo* next() const { return _next; }
duke@0 737 void set_next(BreakpointInfo* n) { _next = n; }
duke@0 738
duke@0 739 // helps for searchers
duke@0 740 bool match(methodOop m, int bci) {
duke@0 741 return bci == _bci && match(m);
duke@0 742 }
duke@0 743
duke@0 744 bool match(methodOop m) {
duke@0 745 return _name_index == m->name_index() &&
duke@0 746 _signature_index == m->signature_index();
duke@0 747 }
duke@0 748
duke@0 749 void set(methodOop method);
duke@0 750 void clear(methodOop method);
duke@0 751 };