annotate src/share/vm/oops/methodOop.hpp @ 3391:2fe087c3e814

7172967: Eliminate constMethod's _method backpointer to methodOop. Summary: Eliminate constMethod's _method backpointer to methodOop, and move the _constant field from methodOop to constMethod. Reviewed-by: roland, bdelsart, kamg
author jiangli
date Wed, 06 Jun 2012 14:33:43 -0400
parents 0382d2b469b2
children eba1d5bce9e8
rev   line source
duke@0 1 /*
never@3065 2 * Copyright (c) 1997, 2012, 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 // |------------------------------------------------------|
duke@0 68 // | methodData (oop) |
duke@0 69 // | interp_invocation_count |
duke@0 70 // |------------------------------------------------------|
duke@0 71 // | access_flags |
duke@0 72 // | vtable_index |
duke@0 73 // |------------------------------------------------------|
duke@0 74 // | result_index (C++ interpreter only) |
duke@0 75 // |------------------------------------------------------|
duke@0 76 // | method_size | max_stack |
duke@0 77 // | max_locals | size_of_parameters |
duke@0 78 // |------------------------------------------------------|
phh@2992 79 // |intrinsic_id| flags | throwout_count |
duke@0 80 // |------------------------------------------------------|
iveresov@1703 81 // | num_breakpoints | (unused) |
duke@0 82 // |------------------------------------------------------|
duke@0 83 // | invocation_counter |
duke@0 84 // | backedge_counter |
duke@0 85 // |------------------------------------------------------|
iveresov@2195 86 // | prev_time (tiered only, 64 bit wide) |
iveresov@2195 87 // | |
iveresov@2195 88 // |------------------------------------------------------|
iveresov@2195 89 // | rate (tiered) |
iveresov@2195 90 // |------------------------------------------------------|
duke@0 91 // | code (pointer) |
duke@0 92 // | i2i (pointer) |
duke@0 93 // | adapter (pointer) |
duke@0 94 // | from_compiled_entry (pointer) |
duke@0 95 // | from_interpreted_entry (pointer) |
duke@0 96 // |------------------------------------------------------|
duke@0 97 // | native_function (present only if native) |
duke@0 98 // | signature_handler (present only if native) |
duke@0 99 // |------------------------------------------------------|
duke@0 100
duke@0 101
duke@0 102 class CheckedExceptionElement;
duke@0 103 class LocalVariableTableElement;
duke@0 104 class AdapterHandlerEntry;
duke@0 105 class methodDataOopDesc;
duke@0 106
duke@0 107 class methodOopDesc : public oopDesc {
duke@0 108 friend class methodKlass;
duke@0 109 friend class VMStructs;
duke@0 110 private:
duke@0 111 constMethodOop _constMethod; // Method read-only data.
duke@0 112 methodDataOop _method_data;
iveresov@1703 113 int _interpreter_invocation_count; // Count of times invoked (reused as prev_event_count in tiered)
duke@0 114 AccessFlags _access_flags; // Access flags
duke@0 115 int _vtable_index; // vtable index of this method (see VtableIndexFlag)
duke@0 116 // note: can have vtables with >2**16 elements (because of inheritance)
duke@0 117 #ifdef CC_INTERP
duke@0 118 int _result_index; // C++ interpreter needs for converting results to/from stack
duke@0 119 #endif
duke@0 120 u2 _method_size; // size of this object
duke@0 121 u2 _max_stack; // Maximum number of entries on the expression stack
duke@0 122 u2 _max_locals; // Number of local variables used by this method
duke@0 123 u2 _size_of_parameters; // size of the parameter block (receiver + arguments) in words
jrose@856 124 u1 _intrinsic_id; // vmSymbols::intrinsic_id (0 == _none)
phh@2992 125 u1 _jfr_towrite : 1, // Flags
phh@2992 126 : 7;
duke@0 127 u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting
duke@0 128 u2 _number_of_breakpoints; // fullspeed debugging support
duke@0 129 InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations
duke@0 130 InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations
iveresov@1703 131
iveresov@2195 132 #ifdef TIERED
iveresov@2195 133 jlong _prev_time; // Previous time the rate was acquired
iveresov@2195 134 float _rate; // Events (invocation and backedge counter increments) per millisecond
iveresov@2195 135 #endif
iveresov@2195 136
duke@0 137 #ifndef PRODUCT
duke@0 138 int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging)
duke@0 139 #endif
duke@0 140 // Entry point for calling both from and to the interpreter.
duke@0 141 address _i2i_entry; // All-args-on-stack calling convention
duke@0 142 // Adapter blob (i2c/c2i) for this methodOop. Set once when method is linked.
duke@0 143 AdapterHandlerEntry* _adapter;
duke@0 144 // Entry point for calling from compiled code, to compiled code if it exists
duke@0 145 // or else the interpreter.
duke@0 146 volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry()
duke@0 147 // The entry point for calling both from and to compiled code is
duke@0 148 // "_code->entry_point()". Because of tiered compilation and de-opt, this
duke@0 149 // field can come and go. It can transition from NULL to not-null at any
duke@0 150 // time (whenever a compile completes). It can transition from not-null to
duke@0 151 // NULL only at safepoints (because of a de-opt).
duke@0 152 nmethod* volatile _code; // Points to the corresponding piece of native code
duke@0 153 volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry
duke@0 154
duke@0 155 public:
jmasa@518 156
duke@0 157 // accessors for instance variables
duke@0 158 constMethodOop constMethod() const { return _constMethod; }
duke@0 159 void set_constMethod(constMethodOop xconst) { oop_store_without_check((oop*)&_constMethod, (oop)xconst); }
duke@0 160
duke@0 161
duke@0 162 static address make_adapters(methodHandle mh, TRAPS);
duke@0 163 volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); }
duke@0 164 volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); }
duke@0 165
duke@0 166 // access flag
duke@0 167 AccessFlags access_flags() const { return _access_flags; }
duke@0 168 void set_access_flags(AccessFlags flags) { _access_flags = flags; }
duke@0 169
duke@0 170 // name
jiangli@3391 171 Symbol* name() const { return constants()->symbol_at(name_index()); }
duke@0 172 int name_index() const { return constMethod()->name_index(); }
duke@0 173 void set_name_index(int index) { constMethod()->set_name_index(index); }
duke@0 174
duke@0 175 // signature
jiangli@3391 176 Symbol* signature() const { return constants()->symbol_at(signature_index()); }
duke@0 177 int signature_index() const { return constMethod()->signature_index(); }
duke@0 178 void set_signature_index(int index) { constMethod()->set_signature_index(index); }
duke@0 179
duke@0 180 // generics support
jiangli@3391 181 Symbol* generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? constants()->symbol_at(idx) : (Symbol*)NULL); }
duke@0 182 int generic_signature_index() const { return constMethod()->generic_signature_index(); }
duke@0 183 void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); }
duke@0 184
duke@0 185 // annotations support
duke@0 186 typeArrayOop annotations() const { return instanceKlass::cast(method_holder())->get_method_annotations_of(method_idnum()); }
duke@0 187 typeArrayOop parameter_annotations() const { return instanceKlass::cast(method_holder())->get_method_parameter_annotations_of(method_idnum()); }
duke@0 188 typeArrayOop annotation_default() const { return instanceKlass::cast(method_holder())->get_method_default_annotations_of(method_idnum()); }
duke@0 189
duke@0 190 #ifdef CC_INTERP
duke@0 191 void set_result_index(BasicType type);
duke@0 192 int result_index() { return _result_index; }
duke@0 193 #endif
duke@0 194
duke@0 195 // Helper routine: get klass name + "." + method name + signature as
duke@0 196 // C string, for the purpose of providing more useful NoSuchMethodErrors
duke@0 197 // and fatal error handling. The string is allocated in resource
duke@0 198 // area if a buffer is not provided by the caller.
duke@0 199 char* name_and_sig_as_C_string();
duke@0 200 char* name_and_sig_as_C_string(char* buf, int size);
duke@0 201
duke@0 202 // Static routine in the situations we don't have a methodOop
coleenp@2062 203 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature);
coleenp@2062 204 static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size);
duke@0 205
never@2027 206 Bytecodes::Code java_code_at(int bci) const {
never@2027 207 return Bytecodes::java_code_at(this, bcp_from(bci));
never@2027 208 }
never@2027 209 Bytecodes::Code code_at(int bci) const {
never@2027 210 return Bytecodes::code_at(this, bcp_from(bci));
never@2027 211 }
never@2027 212
duke@0 213 // JVMTI breakpoints
never@2027 214 Bytecodes::Code orig_bytecode_at(int bci) const;
duke@0 215 void set_orig_bytecode_at(int bci, Bytecodes::Code code);
duke@0 216 void set_breakpoint(int bci);
duke@0 217 void clear_breakpoint(int bci);
duke@0 218 void clear_all_breakpoints();
duke@0 219 // Tracking number of breakpoints, for fullspeed debugging.
duke@0 220 // Only mutated by VM thread.
duke@0 221 u2 number_of_breakpoints() const { return _number_of_breakpoints; }
duke@0 222 void incr_number_of_breakpoints() { ++_number_of_breakpoints; }
duke@0 223 void decr_number_of_breakpoints() { --_number_of_breakpoints; }
duke@0 224 // Initialization only
duke@0 225 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; }
duke@0 226
duke@0 227 // index into instanceKlass methods() array
phh@2992 228 // note: also used by jfr
duke@0 229 u2 method_idnum() const { return constMethod()->method_idnum(); }
duke@0 230 void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); }
duke@0 231
duke@0 232 // code size
duke@0 233 int code_size() const { return constMethod()->code_size(); }
duke@0 234
duke@0 235 // method size
duke@0 236 int method_size() const { return _method_size; }
duke@0 237 void set_method_size(int size) {
duke@0 238 assert(0 <= size && size < (1 << 16), "invalid method size");
duke@0 239 _method_size = size;
duke@0 240 }
duke@0 241
duke@0 242 // constant pool for klassOop holding this method
jiangli@3391 243 constantPoolOop constants() const { return constMethod()->constants(); }
jiangli@3391 244 void set_constants(constantPoolOop c) { constMethod()->set_constants(c); }
duke@0 245
duke@0 246 // max stack
duke@0 247 int max_stack() const { return _max_stack; }
duke@0 248 void set_max_stack(int size) { _max_stack = size; }
duke@0 249
duke@0 250 // max locals
duke@0 251 int max_locals() const { return _max_locals; }
duke@0 252 void set_max_locals(int size) { _max_locals = size; }
iveresov@1703 253
iveresov@1703 254 int highest_comp_level() const;
iveresov@1703 255 void set_highest_comp_level(int level);
iveresov@1703 256 int highest_osr_comp_level() const;
iveresov@1703 257 void set_highest_osr_comp_level(int level);
duke@0 258
duke@0 259 // Count of times method was exited via exception while interpreting
duke@0 260 void interpreter_throwout_increment() {
duke@0 261 if (_interpreter_throwout_count < 65534) {
duke@0 262 _interpreter_throwout_count++;
duke@0 263 }
duke@0 264 }
duke@0 265
duke@0 266 int interpreter_throwout_count() const { return _interpreter_throwout_count; }
duke@0 267 void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; }
duke@0 268
duke@0 269 // size of parameters
duke@0 270 int size_of_parameters() const { return _size_of_parameters; }
duke@0 271
duke@0 272 bool has_stackmap_table() const {
duke@0 273 return constMethod()->has_stackmap_table();
duke@0 274 }
duke@0 275
duke@0 276 typeArrayOop stackmap_data() const {
duke@0 277 return constMethod()->stackmap_data();
duke@0 278 }
duke@0 279
kamg@1797 280 void set_stackmap_data(typeArrayOop sd) {
kamg@1797 281 constMethod()->set_stackmap_data(sd);
kamg@1797 282 }
kamg@1797 283
duke@0 284 // exception handler table
duke@0 285 typeArrayOop exception_table() const
duke@0 286 { return constMethod()->exception_table(); }
duke@0 287 void set_exception_table(typeArrayOop e)
duke@0 288 { constMethod()->set_exception_table(e); }
duke@0 289 bool has_exception_handler() const
duke@0 290 { return constMethod()->has_exception_handler(); }
duke@0 291
duke@0 292 // Finds the first entry point bci of an exception handler for an
duke@0 293 // exception of klass ex_klass thrown at throw_bci. A value of NULL
duke@0 294 // for ex_klass indicates that the exception klass is not known; in
duke@0 295 // this case it matches any constraint class. Returns -1 if the
duke@0 296 // exception cannot be handled in this method. The handler
duke@0 297 // constraint classes are loaded if necessary. Note that this may
duke@0 298 // throw an exception if loading of the constraint classes causes
duke@0 299 // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError.
duke@0 300 // If an exception is thrown, returns the bci of the
duke@0 301 // exception handler which caused the exception to be thrown, which
duke@0 302 // is needed for proper retries. See, for example,
duke@0 303 // InterpreterRuntime::exception_handler_for_exception.
duke@0 304 int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS);
duke@0 305
duke@0 306 // method data access
duke@0 307 methodDataOop method_data() const {
duke@0 308 return _method_data;
duke@0 309 }
duke@0 310 void set_method_data(methodDataOop data) {
duke@0 311 oop_store_without_check((oop*)&_method_data, (oop)data);
duke@0 312 }
duke@0 313
duke@0 314 // invocation counter
iveresov@1703 315 InvocationCounter* invocation_counter() { return &_invocation_counter; }
iveresov@1703 316 InvocationCounter* backedge_counter() { return &_backedge_counter; }
iveresov@1703 317
iveresov@2195 318 #ifdef TIERED
iveresov@2195 319 // We are reusing interpreter_invocation_count as a holder for the previous event count!
iveresov@2195 320 // We can do that since interpreter_invocation_count is not used in tiered.
iveresov@2195 321 int prev_event_count() const { return _interpreter_invocation_count; }
iveresov@2195 322 void set_prev_event_count(int count) { _interpreter_invocation_count = count; }
iveresov@2195 323 jlong prev_time() const { return _prev_time; }
iveresov@2195 324 void set_prev_time(jlong time) { _prev_time = time; }
iveresov@2195 325 float rate() const { return _rate; }
iveresov@2195 326 void set_rate(float rate) { _rate = rate; }
iveresov@2195 327 #endif
iveresov@2195 328
iveresov@1703 329 int invocation_count();
iveresov@1703 330 int backedge_count();
iveresov@1703 331
iveresov@1703 332 bool was_executed_more_than(int n);
iveresov@1703 333 bool was_never_executed() { return !was_executed_more_than(0); }
duke@0 334
duke@0 335 static void build_interpreter_method_data(methodHandle method, TRAPS);
duke@0 336
iveresov@1703 337 int interpreter_invocation_count() {
iveresov@1703 338 if (TieredCompilation) return invocation_count();
iveresov@1703 339 else return _interpreter_invocation_count;
iveresov@1703 340 }
duke@0 341 void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; }
iveresov@1703 342 int increment_interpreter_invocation_count() {
iveresov@1703 343 if (TieredCompilation) ShouldNotReachHere();
iveresov@1703 344 return ++_interpreter_invocation_count;
iveresov@1703 345 }
duke@0 346
duke@0 347 #ifndef PRODUCT
iveresov@1703 348 int compiled_invocation_count() const { return _compiled_invocation_count; }
duke@0 349 void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; }
duke@0 350 #endif // not PRODUCT
duke@0 351
twisti@605 352 // Clear (non-shared space) pointers which could not be relevant
duke@0 353 // if this (shared) method were mapped into another JVM.
duke@0 354 void remove_unshareable_info();
duke@0 355
duke@0 356 // nmethod/verified compiler entry
duke@0 357 address verified_code_entry();
duke@0 358 bool check_code() const; // Not inline to avoid circular ref
duke@0 359 nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); }
duke@0 360 void clear_code(); // Clear out any compiled code
kvn@1202 361 static void set_code(methodHandle mh, nmethod* code);
duke@0 362 void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; }
duke@0 363 address get_i2c_entry();
duke@0 364 address get_c2i_entry();
duke@0 365 address get_c2i_unverified_entry();
duke@0 366 AdapterHandlerEntry* adapter() { return _adapter; }
duke@0 367 // setup entry points
duke@0 368 void link_method(methodHandle method, TRAPS);
duke@0 369 // clear entry points. Used by sharing code
duke@0 370 void unlink_method();
duke@0 371
duke@0 372 // vtable index
duke@0 373 enum VtableIndexFlag {
duke@0 374 // Valid vtable indexes are non-negative (>= 0).
duke@0 375 // These few negative values are used as sentinels.
jrose@710 376 highest_unused_vtable_index_value = -5,
duke@0 377 invalid_vtable_index = -4, // distinct from any valid vtable index
duke@0 378 garbage_vtable_index = -3, // not yet linked; no vtable layout yet
duke@0 379 nonvirtual_vtable_index = -2 // there is no need for vtable dispatch
duke@0 380 // 6330203 Note: Do not use -1, which was overloaded with many meanings.
duke@0 381 };
duke@0 382 DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; })
duke@0 383 int vtable_index() const { assert(valid_vtable_index(), "");
duke@0 384 return _vtable_index; }
duke@0 385 void set_vtable_index(int index) { _vtable_index = index; }
duke@0 386
duke@0 387 // interpreter entry
duke@0 388 address interpreter_entry() const { return _i2i_entry; }
duke@0 389 // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry
duke@0 390 void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; }
duke@0 391 int interpreter_kind(void) {
duke@0 392 return constMethod()->interpreter_kind();
duke@0 393 }
duke@0 394 void set_interpreter_kind();
duke@0 395 void set_interpreter_kind(int kind) {
duke@0 396 constMethod()->set_interpreter_kind(kind);
duke@0 397 }
duke@0 398
duke@0 399 // native function (used for native methods only)
duke@0 400 enum {
duke@0 401 native_bind_event_is_interesting = true
duke@0 402 };
duke@0 403 address native_function() const { return *(native_function_addr()); }
never@3065 404 address critical_native_function();
never@3065 405
duke@0 406 // Must specify a real function (not NULL).
duke@0 407 // Use clear_native_function() to unregister.
duke@0 408 void set_native_function(address function, bool post_event_flag);
duke@0 409 bool has_native_function() const;
duke@0 410 void clear_native_function();
duke@0 411
duke@0 412 // signature handler (used for native methods only)
duke@0 413 address signature_handler() const { return *(signature_handler_addr()); }
duke@0 414 void set_signature_handler(address handler);
duke@0 415
duke@0 416 // Interpreter oopmap support
duke@0 417 void mask_for(int bci, InterpreterOopMap* mask);
duke@0 418
duke@0 419 #ifndef PRODUCT
duke@0 420 // operations on invocation counter
iveresov@1703 421 void print_invocation_count();
duke@0 422 #endif
duke@0 423
duke@0 424 // byte codes
twisti@1138 425 void set_code(address code) { return constMethod()->set_code(code); }
duke@0 426 address code_base() const { return constMethod()->code_base(); }
duke@0 427 bool contains(address bcp) const { return constMethod()->contains(bcp); }
duke@0 428
duke@0 429 // prints byte codes
duke@0 430 void print_codes() const { print_codes_on(tty); }
duke@0 431 void print_codes_on(outputStream* st) const PRODUCT_RETURN;
duke@0 432 void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN;
duke@0 433
duke@0 434 // checked exceptions
duke@0 435 int checked_exceptions_length() const
duke@0 436 { return constMethod()->checked_exceptions_length(); }
duke@0 437 CheckedExceptionElement* checked_exceptions_start() const
duke@0 438 { return constMethod()->checked_exceptions_start(); }
duke@0 439
duke@0 440 // localvariable table
duke@0 441 bool has_localvariable_table() const
duke@0 442 { return constMethod()->has_localvariable_table(); }
duke@0 443 int localvariable_table_length() const
duke@0 444 { return constMethod()->localvariable_table_length(); }
duke@0 445 LocalVariableTableElement* localvariable_table_start() const
duke@0 446 { return constMethod()->localvariable_table_start(); }
duke@0 447
duke@0 448 bool has_linenumber_table() const
duke@0 449 { return constMethod()->has_linenumber_table(); }
duke@0 450 u_char* compressed_linenumber_table() const
duke@0 451 { return constMethod()->compressed_linenumber_table(); }
duke@0 452
duke@0 453 // method holder (the klassOop holding this method)
jiangli@3391 454 klassOop method_holder() const { return constants()->pool_holder(); }
duke@0 455
duke@0 456 void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments)
coleenp@2062 457 Symbol* klass_name() const; // returns the name of the method holder
duke@0 458 BasicType result_type() const; // type of the method result
duke@0 459 int result_type_index() const; // type index of the method result
duke@0 460 bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); }
duke@0 461 bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); }
duke@0 462
duke@0 463 // Checked exceptions thrown by this method (resolved to mirrors)
duke@0 464 objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); }
duke@0 465
duke@0 466 // Access flags
duke@0 467 bool is_public() const { return access_flags().is_public(); }
duke@0 468 bool is_private() const { return access_flags().is_private(); }
duke@0 469 bool is_protected() const { return access_flags().is_protected(); }
duke@0 470 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); }
duke@0 471 bool is_static() const { return access_flags().is_static(); }
duke@0 472 bool is_final() const { return access_flags().is_final(); }
duke@0 473 bool is_synchronized() const { return access_flags().is_synchronized();}
duke@0 474 bool is_native() const { return access_flags().is_native(); }
duke@0 475 bool is_abstract() const { return access_flags().is_abstract(); }
duke@0 476 bool is_strict() const { return access_flags().is_strict(); }
duke@0 477 bool is_synthetic() const { return access_flags().is_synthetic(); }
duke@0 478
duke@0 479 // returns true if contains only return operation
duke@0 480 bool is_empty_method() const;
duke@0 481
duke@0 482 // returns true if this is a vanilla constructor
duke@0 483 bool is_vanilla_constructor() const;
duke@0 484
duke@0 485 // checks method and its method holder
duke@0 486 bool is_final_method() const;
duke@0 487 bool is_strict_method() const;
duke@0 488
duke@0 489 // true if method needs no dynamic dispatch (final and/or no vtable entry)
duke@0 490 bool can_be_statically_bound() const;
duke@0 491
duke@0 492 // returns true if the method has any backward branches.
duke@0 493 bool has_loops() {
duke@0 494 return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag();
duke@0 495 };
duke@0 496
duke@0 497 bool compute_has_loops_flag();
duke@0 498
duke@0 499 bool has_jsrs() {
duke@0 500 return access_flags().has_jsrs();
duke@0 501 };
duke@0 502 void set_has_jsrs() {
duke@0 503 _access_flags.set_has_jsrs();
duke@0 504 }
duke@0 505
duke@0 506 // returns true if the method has any monitors.
duke@0 507 bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); }
duke@0 508 bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); }
duke@0 509
duke@0 510 void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); }
duke@0 511
duke@0 512 // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes
duke@0 513 // propererly nest in the method. It might return false, even though they actually nest properly, since the info.
duke@0 514 // has not been computed yet.
duke@0 515 bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); }
duke@0 516 void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); }
duke@0 517
duke@0 518 // returns true if the method is an accessor function (setter/getter).
duke@0 519 bool is_accessor() const;
duke@0 520
duke@0 521 // returns true if the method is an initializer (<init> or <clinit>).
duke@0 522 bool is_initializer() const;
duke@0 523
kamg@2181 524 // returns true if the method is static OR if the classfile version < 51
kamg@2181 525 bool has_valid_initializer_flags() const;
kamg@2181 526
kamg@2181 527 // returns true if the method name is <clinit> and the method has
kamg@2181 528 // valid static initializer flags.
kamg@2181 529 bool is_static_initializer() const;
kamg@2181 530
duke@0 531 // compiled code support
duke@0 532 // NOTE: code() is inherently racy as deopt can be clearing code
duke@0 533 // simultaneously. Use with caution.
duke@0 534 bool has_compiled_code() const { return code() != NULL; }
duke@0 535
duke@0 536 // sizing
duke@0 537 static int object_size(bool is_native);
duke@0 538 static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; }
duke@0 539 int object_size() const { return method_size(); }
duke@0 540
duke@0 541 bool object_is_parsable() const { return method_size() > 0; }
duke@0 542
duke@0 543 // interpreter support
duke@0 544 static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); }
duke@0 545 static ByteSize access_flags_offset() { return byte_offset_of(methodOopDesc, _access_flags ); }
duke@0 546 #ifdef CC_INTERP
duke@0 547 static ByteSize result_index_offset() { return byte_offset_of(methodOopDesc, _result_index ); }
duke@0 548 #endif /* CC_INTERP */
duke@0 549 static ByteSize size_of_locals_offset() { return byte_offset_of(methodOopDesc, _max_locals ); }
duke@0 550 static ByteSize size_of_parameters_offset() { return byte_offset_of(methodOopDesc, _size_of_parameters); }
duke@0 551 static ByteSize from_compiled_offset() { return byte_offset_of(methodOopDesc, _from_compiled_entry); }
duke@0 552 static ByteSize code_offset() { return byte_offset_of(methodOopDesc, _code); }
duke@0 553 static ByteSize invocation_counter_offset() { return byte_offset_of(methodOopDesc, _invocation_counter); }
duke@0 554 static ByteSize backedge_counter_offset() { return byte_offset_of(methodOopDesc, _backedge_counter); }
duke@0 555 static ByteSize method_data_offset() {
duke@0 556 return byte_offset_of(methodOopDesc, _method_data);
duke@0 557 }
duke@0 558 static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); }
duke@0 559 #ifndef PRODUCT
duke@0 560 static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); }
duke@0 561 #endif // not PRODUCT
duke@0 562 static ByteSize native_function_offset() { return in_ByteSize(sizeof(methodOopDesc)); }
duke@0 563 static ByteSize from_interpreted_offset() { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); }
duke@0 564 static ByteSize interpreter_entry_offset() { return byte_offset_of(methodOopDesc, _i2i_entry ); }
duke@0 565 static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(methodOopDesc) + wordSize); }
duke@0 566 static ByteSize max_stack_offset() { return byte_offset_of(methodOopDesc, _max_stack ); }
duke@0 567
duke@0 568 // for code generation
duke@0 569 static int method_data_offset_in_bytes() { return offset_of(methodOopDesc, _method_data); }
duke@0 570 static int interpreter_invocation_counter_offset_in_bytes()
duke@0 571 { return offset_of(methodOopDesc, _interpreter_invocation_count); }
jrose@1713 572 static int intrinsic_id_offset_in_bytes() { return offset_of(methodOopDesc, _intrinsic_id); }
jrose@1713 573 static int intrinsic_id_size_in_bytes() { return sizeof(u1); }
duke@0 574
duke@0 575 // Static methods that are used to implement member methods where an exposed this pointer
duke@0 576 // is needed due to possible GCs
duke@0 577 static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS);
duke@0 578
duke@0 579 // Returns the byte code index from the byte code pointer
duke@0 580 int bci_from(address bcp) const;
duke@0 581 address bcp_from(int bci) const;
duke@0 582 int validate_bci_from_bcx(intptr_t bcx) const;
duke@0 583
duke@0 584 // Returns the line number for a bci if debugging information for the method is prowided,
duke@0 585 // -1 is returned otherwise.
duke@0 586 int line_number_from_bci(int bci) const;
duke@0 587
duke@0 588 // Reflection support
duke@0 589 bool is_overridden_in(klassOop k) const;
duke@0 590
jrose@710 591 // JSR 292 support
jrose@710 592 bool is_method_handle_invoke() const { return access_flags().is_method_handle_invoke(); }
jrose@1427 593 static bool is_method_handle_invoke_name(vmSymbols::SID name_sid);
coleenp@2062 594 static bool is_method_handle_invoke_name(Symbol* name) {
jrose@1427 595 return is_method_handle_invoke_name(vmSymbols::find_sid(name));
jrose@1427 596 }
twisti@1152 597 // Tests if this method is an internal adapter frame from the
twisti@1152 598 // MethodHandleCompiler.
twisti@1152 599 bool is_method_handle_adapter() const;
jrose@710 600 static methodHandle make_invoke_method(KlassHandle holder,
coleenp@2062 601 Symbol* name, //invokeExact or invokeGeneric
coleenp@2062 602 Symbol* signature, //anything at all
jrose@710 603 Handle method_type,
jrose@710 604 TRAPS);
jrose@2547 605 static klassOop check_non_bcp_klass(klassOop klass);
jrose@710 606 // these operate only on invoke methods:
jrose@710 607 oop method_handle_type() const;
jrose@710 608 static jint* method_type_offsets_chain(); // series of pointer-offsets, terminated by -1
jrose@710 609 // presize interpreter frames for extra interpreter stack entries, if needed
jrose@726 610 // method handles want to be able to push a few extra values (e.g., a bound receiver), and
jrose@726 611 // invokedynamic sometimes needs to push a bootstrap method, call site, and arglist,
jrose@726 612 // all without checking for a stack overflow
twisti@2263 613 static int extra_stack_entries() { return EnableInvokeDynamic ? (int) MethodHandlePushLimit + 3 : 0; }
jrose@710 614 static int extra_stack_words(); // = extra_stack_entries() * Interpreter::stackElementSize()
twisti@1152 615
duke@0 616 // RedefineClasses() support:
duke@0 617 bool is_old() const { return access_flags().is_old(); }
duke@0 618 void set_is_old() { _access_flags.set_is_old(); }
duke@0 619 bool is_obsolete() const { return access_flags().is_obsolete(); }
duke@0 620 void set_is_obsolete() { _access_flags.set_is_obsolete(); }
dcubed@48 621 // see the definition in methodOop.cpp for the gory details
dcubed@48 622 bool should_not_be_cached() const;
duke@0 623
duke@0 624 // JVMTI Native method prefixing support:
duke@0 625 bool is_prefixed_native() const { return access_flags().is_prefixed_native(); }
duke@0 626 void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); }
duke@0 627
duke@0 628 // Rewriting support
duke@0 629 static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length,
duke@0 630 u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS);
duke@0 631
duke@0 632 // Get this method's jmethodID -- allocate if it doesn't exist
duke@0 633 jmethodID jmethod_id() { methodHandle this_h(this);
dcubed@977 634 return instanceKlass::get_jmethod_id(method_holder(), this_h); }
duke@0 635
duke@0 636 // Lookup the jmethodID for this method. Return NULL if not found.
duke@0 637 // NOTE that this function can be called from a signal handler
duke@0 638 // (see AsyncGetCallTrace support for Forte Analyzer) and this
duke@0 639 // needs to be async-safe. No allocation should be done and
duke@0 640 // so handles are not used to avoid deadlock.
duke@0 641 jmethodID find_jmethod_id_or_null() { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); }
duke@0 642
duke@0 643 // JNI static invoke cached itable index accessors
duke@0 644 int cached_itable_index() { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); }
duke@0 645 void set_cached_itable_index(int index) { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); }
duke@0 646
duke@0 647 // Support for inlining of intrinsic methods
jrose@856 648 vmIntrinsics::ID intrinsic_id() const { return (vmIntrinsics::ID) _intrinsic_id; }
jrose@856 649 void set_intrinsic_id(vmIntrinsics::ID id) { _intrinsic_id = (u1) id; }
jrose@856 650
jrose@856 651 // Helper routines for intrinsic_id() and vmIntrinsics::method().
jrose@856 652 void init_intrinsic_id(); // updates from _none if a match
jrose@856 653 static vmSymbols::SID klass_id_for_intrinsics(klassOop holder);
duke@0 654
phh@2992 655 bool jfr_towrite() { return _jfr_towrite; }
phh@2992 656 void set_jfr_towrite(bool towrite) { _jfr_towrite = towrite; }
phh@2992 657
duke@0 658 // On-stack replacement support
iveresov@1703 659 bool has_osr_nmethod(int level, bool match_level) {
iveresov@1703 660 return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL;
iveresov@1703 661 }
iveresov@1703 662
iveresov@1703 663 nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) {
iveresov@1703 664 return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci, level, match_level);
iveresov@1703 665 }
duke@0 666
duke@0 667 // Inline cache support
duke@0 668 void cleanup_inline_caches();
duke@0 669
duke@0 670 // Find if klass for method is loaded
duke@0 671 bool is_klass_loaded_by_klass_index(int klass_index) const;
duke@0 672 bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const;
duke@0 673
duke@0 674 // Indicates whether compilation failed earlier for this method, or
duke@0 675 // whether it is not compilable for another reason like having a
duke@0 676 // breakpoint set in it.
iveresov@1703 677 bool is_not_compilable(int comp_level = CompLevel_any) const;
iveresov@1703 678 void set_not_compilable(int comp_level = CompLevel_all, bool report = true);
iveresov@1703 679 void set_not_compilable_quietly(int comp_level = CompLevel_all) {
kvn@1208 680 set_not_compilable(comp_level, false);
kvn@1208 681 }
iveresov@1703 682 bool is_not_osr_compilable(int comp_level = CompLevel_any) const {
iveresov@1703 683 return is_not_compilable(comp_level) || access_flags().is_not_osr_compilable();
iveresov@1703 684 }
iveresov@1703 685 void set_not_osr_compilable() { _access_flags.set_not_osr_compilable(); }
iveresov@1703 686 bool is_not_c1_compilable() const { return access_flags().is_not_c1_compilable(); }
iveresov@1703 687 void set_not_c1_compilable() { _access_flags.set_not_c1_compilable(); }
iveresov@1703 688 bool is_not_c2_compilable() const { return access_flags().is_not_c2_compilable(); }
iveresov@1703 689 void set_not_c2_compilable() { _access_flags.set_not_c2_compilable(); }
duke@0 690
duke@0 691 // Background compilation support
iveresov@1703 692 bool queued_for_compilation() const { return access_flags().queued_for_compilation(); }
iveresov@1703 693 void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); }
iveresov@1703 694 void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); }
duke@0 695
duke@0 696 // Resolve all classes in signature, return 'true' if successful
duke@0 697 static bool load_signature_classes(methodHandle m, TRAPS);
duke@0 698
duke@0 699 // Return if true if not all classes references in signature, including return type, has been loaded
duke@0 700 static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS);
duke@0 701
duke@0 702 // Printing
duke@0 703 void print_short_name(outputStream* st) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM
duke@0 704 void print_name(outputStream* st) PRODUCT_RETURN; // prints as "virtual void foo(int)"
duke@0 705
duke@0 706 // Helper routine used for method sorting
duke@0 707 static void sort_methods(objArrayOop methods,
duke@0 708 objArrayOop methods_annotations,
duke@0 709 objArrayOop methods_parameter_annotations,
duke@0 710 objArrayOop methods_default_annotations,
duke@0 711 bool idempotent = false);
duke@0 712
duke@0 713 // size of parameters
duke@0 714 void set_size_of_parameters(int size) { _size_of_parameters = size; }
duke@0 715 private:
duke@0 716
duke@0 717 // Inlined elements
duke@0 718 address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); }
duke@0 719 address* signature_handler_addr() const { return native_function_addr() + 1; }
duke@0 720
duke@0 721 // Garbage collection support
duke@0 722 oop* adr_constMethod() const { return (oop*)&_constMethod; }
duke@0 723 oop* adr_method_data() const { return (oop*)&_method_data; }
duke@0 724 };
duke@0 725
duke@0 726
duke@0 727 // Utility class for compressing line number tables
duke@0 728
duke@0 729 class CompressedLineNumberWriteStream: public CompressedWriteStream {
duke@0 730 private:
duke@0 731 int _bci;
duke@0 732 int _line;
duke@0 733 public:
duke@0 734 // Constructor
duke@0 735 CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {}
duke@0 736 CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {}
duke@0 737
duke@0 738 // Write (bci, line number) pair to stream
duke@0 739 void write_pair_regular(int bci_delta, int line_delta);
duke@0 740
duke@0 741 inline void write_pair_inline(int bci, int line) {
duke@0 742 int bci_delta = bci - _bci;
duke@0 743 int line_delta = line - _line;
duke@0 744 _bci = bci;
duke@0 745 _line = line;
duke@0 746 // Skip (0,0) deltas - they do not add information and conflict with terminator.
duke@0 747 if (bci_delta == 0 && line_delta == 0) return;
duke@0 748 // Check if bci is 5-bit and line number 3-bit unsigned.
duke@0 749 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) {
duke@0 750 // Compress into single byte.
duke@0 751 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta;
duke@0 752 // Check that value doesn't match escape character.
duke@0 753 if (value != 0xFF) {
duke@0 754 write_byte(value);
duke@0 755 return;
duke@0 756 }
duke@0 757 }
duke@0 758 write_pair_regular(bci_delta, line_delta);
duke@0 759 }
duke@0 760
duke@0 761 // Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair.
duke@0 762 // Disabling optimization doesn't work for methods in header files
duke@0 763 // so we force it to call through the non-optimized version in the .cpp.
duke@0 764 // It's gross, but it's the only way we can ensure that all callers are
sla@2105 765 // fixed. _MSC_VER is defined by the windows compiler
sla@2105 766 #if defined(_M_AMD64) && _MSC_VER >= 1400
duke@0 767 void write_pair(int bci, int line);
duke@0 768 #else
duke@0 769 void write_pair(int bci, int line) { write_pair_inline(bci, line); }
duke@0 770 #endif
duke@0 771
duke@0 772 // Write end-of-stream marker
duke@0 773 void write_terminator() { write_byte(0); }
duke@0 774 };
duke@0 775
duke@0 776
duke@0 777 // Utility class for decompressing line number tables
duke@0 778
duke@0 779 class CompressedLineNumberReadStream: public CompressedReadStream {
duke@0 780 private:
duke@0 781 int _bci;
duke@0 782 int _line;
duke@0 783 public:
duke@0 784 // Constructor
duke@0 785 CompressedLineNumberReadStream(u_char* buffer);
duke@0 786 // Read (bci, line number) pair from stream. Returns false at end-of-stream.
duke@0 787 bool read_pair();
duke@0 788 // Accessing bci and line number (after calling read_pair)
duke@0 789 int bci() const { return _bci; }
duke@0 790 int line() const { return _line; }
duke@0 791 };
duke@0 792
duke@0 793
duke@0 794 /// Fast Breakpoints.
duke@0 795
duke@0 796 // If this structure gets more complicated (because bpts get numerous),
duke@0 797 // move it into its own header.
duke@0 798
duke@0 799 // There is presently no provision for concurrent access
duke@0 800 // to breakpoint lists, which is only OK for JVMTI because
duke@0 801 // breakpoints are written only at safepoints, and are read
duke@0 802 // concurrently only outside of safepoints.
duke@0 803
duke@0 804 class BreakpointInfo : public CHeapObj {
duke@0 805 friend class VMStructs;
duke@0 806 private:
duke@0 807 Bytecodes::Code _orig_bytecode;
duke@0 808 int _bci;
duke@0 809 u2 _name_index; // of method
duke@0 810 u2 _signature_index; // of method
duke@0 811 BreakpointInfo* _next; // simple storage allocation
duke@0 812
duke@0 813 public:
duke@0 814 BreakpointInfo(methodOop m, int bci);
duke@0 815
duke@0 816 // accessors
duke@0 817 Bytecodes::Code orig_bytecode() { return _orig_bytecode; }
duke@0 818 void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; }
duke@0 819 int bci() { return _bci; }
duke@0 820
duke@0 821 BreakpointInfo* next() const { return _next; }
duke@0 822 void set_next(BreakpointInfo* n) { _next = n; }
duke@0 823
duke@0 824 // helps for searchers
never@2027 825 bool match(const methodOopDesc* m, int bci) {
duke@0 826 return bci == _bci && match(m);
duke@0 827 }
duke@0 828
never@2027 829 bool match(const methodOopDesc* m) {
duke@0 830 return _name_index == m->name_index() &&
duke@0 831 _signature_index == m->signature_index();
duke@0 832 }
duke@0 833
duke@0 834 void set(methodOop method);
duke@0 835 void clear(methodOop method);
duke@0 836 };
stefank@1879 837
stefank@1879 838 #endif // SHARE_VM_OOPS_METHODOOP_HPP