163 void set_flags(intx flags) { _flags = flags; }
164 void set_field_flags(TosState field_type, int option_bits, int field_index) {
165 assert((field_index & field_index_mask) == field_index, "field_index in range");
166 set_flags(make_flags(field_type, option_bits | (1 << is_field_entry_shift), field_index));
167 }
168 void set_method_flags(TosState return_type, int option_bits, int method_params) {
169 assert((method_params & parameter_size_mask) == method_params, "method_params in range");
170 set_flags(make_flags(return_type, option_bits, method_params));
171 }
172
173 public:
174 // specific bit definitions for the flags field:
175 // (Note: the interpreter must use these definitions to access the CP cache.)
176 enum {
177 // high order bits are the TosState corresponding to field type or method return type
178 tos_state_bits = 4,
179 tos_state_mask = right_n_bits(tos_state_bits),
180 tos_state_shift = BitsPerInt - tos_state_bits, // see verify_tos_state_shift below
181 // misc. option bits; can be any bit position in [16..27]
182 is_field_entry_shift = 26, // (F) is it a field or a method?
183 has_method_type_shift = 25, // (M) does the call site have a MethodType?
184 has_appendix_shift = 24, // (A) does the call site have an appendix argument?
185 is_forced_virtual_shift = 23, // (I) is the interface reference forced to virtual mode?
186 is_final_shift = 22, // (f) is the field or method final?
187 is_volatile_shift = 21, // (v) is the field volatile?
188 is_vfinal_shift = 20, // (vf) did the call resolve to a final method?
189 indy_resolution_failed_shift= 19, // (indy_rf) did call site specifier resolution fail ?
190 // low order bits give field index (for FieldInfo) or method parameter size:
191 field_index_bits = 16,
192 field_index_mask = right_n_bits(field_index_bits),
193 parameter_size_bits = 8, // subset of field_index_mask, range is 0..255
194 parameter_size_mask = right_n_bits(parameter_size_bits),
195 option_bits_mask = ~(((~0u) << tos_state_shift) | (field_index_mask | parameter_size_mask))
196 };
197
198 // specific bit definitions for the indices field:
199 enum {
200 cp_index_bits = 2*BitsPerByte,
201 cp_index_mask = right_n_bits(cp_index_bits),
202 bytecode_1_shift = cp_index_bits,
203 bytecode_1_mask = right_n_bits(BitsPerByte), // == (u1)0xFF
274 // null appendix, the argument is not passed at all.
275 //
276 // The appendix is *not* represented in the signature of the symbolic
277 // reference for the call site, but (if present) it *is* represented in
278 // the Method* bound to the site. This means that static and dynamic
279 // resolution logic needs to make slightly different assessments about the
280 // number and types of arguments.
281 void set_method_handle_common(
282 const constantPoolHandle& cpool, // holding constant pool (required for locking)
283 Bytecodes::Code invoke_code, // _invokehandle or _invokedynamic
284 const CallInfo &call_info // Call link information
285 );
286
287 // Return TRUE if resolution failed and this thread got to record the failure
288 // status. Return FALSE if another thread succeeded or failed in resolving
289 // the method and recorded the success or failure before this thread had a
290 // chance to record its failure.
291 bool save_and_throw_indy_exc(const constantPoolHandle& cpool, int cpool_index,
292 int index, constantTag tag, TRAPS);
293
294 // invokedynamic and invokehandle call sites have two entries in the
295 // resolved references array:
296 // appendix (at index+0)
297 // MethodType (at index+1)
298 enum {
299 _indy_resolved_references_appendix_offset = 0,
300 _indy_resolved_references_method_type_offset = 1,
301 _indy_resolved_references_entries
302 };
303
304 Method* method_if_resolved(const constantPoolHandle& cpool);
305 oop appendix_if_resolved(const constantPoolHandle& cpool);
306 oop method_type_if_resolved(const constantPoolHandle& cpool);
307
308 void set_parameter_size(int value);
309
310 // Which bytecode number (1 or 2) in the index field is valid for this bytecode?
311 // Returns -1 if neither is valid.
312 static int bytecode_number(Bytecodes::Code code) {
313 switch (code) {
314 case Bytecodes::_getstatic : // fall through
315 case Bytecodes::_getfield : // fall through
316 case Bytecodes::_invokespecial : // fall through
317 case Bytecodes::_invokestatic : // fall through
318 case Bytecodes::_invokehandle : // fall through
319 case Bytecodes::_invokedynamic : // fall through
320 case Bytecodes::_invokeinterface : return 1;
321 case Bytecodes::_putstatic : // fall through
322 case Bytecodes::_putfield : // fall through
323 case Bytecodes::_invokevirtual : return 2;
324 default : break;
325 }
326 return -1;
339 Method* f1_as_method() const;
340 Klass* f1_as_klass() const;
341 // Use the accessor f1() to acquire _f1's value. This is needed for
342 // example in BytecodeInterpreter::run(), where is_f1_null() is
343 // called to check if an invokedynamic call is resolved. This load
344 // of _f1 must be ordered with the loads performed by
345 // cache->main_entry_index().
346 bool is_f1_null() const; // classifies a CPC entry as unbound
347 int f2_as_index() const { assert(!is_vfinal(), ""); return (int) _f2; }
348 Method* f2_as_vfinal_method() const { assert(is_vfinal(), ""); return (Method*)_f2; }
349 Method* f2_as_interface_method() const;
350 intx flags_ord() const;
351 int field_index() const { assert(is_field_entry(), ""); return (_flags & field_index_mask); }
352 int parameter_size() const { assert(is_method_entry(), ""); return (_flags & parameter_size_mask); }
353 bool is_volatile() const { return (_flags & (1 << is_volatile_shift)) != 0; }
354 bool is_final() const { return (_flags & (1 << is_final_shift)) != 0; }
355 bool is_forced_virtual() const { return (_flags & (1 << is_forced_virtual_shift)) != 0; }
356 bool is_vfinal() const { return (_flags & (1 << is_vfinal_shift)) != 0; }
357 bool indy_resolution_failed() const;
358 bool has_appendix() const;
359 bool has_method_type() const;
360 bool is_method_entry() const { return (_flags & (1 << is_field_entry_shift)) == 0; }
361 bool is_field_entry() const { return (_flags & (1 << is_field_entry_shift)) != 0; }
362 bool is_long() const { return flag_state() == ltos; }
363 bool is_double() const { return flag_state() == dtos; }
364 TosState flag_state() const { assert((uint)number_of_states <= (uint)tos_state_mask+1, "");
365 return (TosState)((_flags >> tos_state_shift) & tos_state_mask); }
366 void set_indy_resolution_failed();
367
368 // Code generation support
369 static WordSize size() {
370 return in_WordSize(align_up((int)sizeof(ConstantPoolCacheEntry), wordSize) / wordSize);
371 }
372 static ByteSize size_in_bytes() { return in_ByteSize(sizeof(ConstantPoolCacheEntry)); }
373 static ByteSize indices_offset() { return byte_offset_of(ConstantPoolCacheEntry, _indices); }
374 static ByteSize f1_offset() { return byte_offset_of(ConstantPoolCacheEntry, _f1); }
375 static ByteSize f2_offset() { return byte_offset_of(ConstantPoolCacheEntry, _f2); }
376 static ByteSize flags_offset() { return byte_offset_of(ConstantPoolCacheEntry, _flags); }
377
378 #if INCLUDE_JVMTI
379 // RedefineClasses() API support:
426 // time when caching java heap object is supported.
427 CDS_JAVA_HEAP_ONLY(narrowOop _archived_references;)
428
429 // Sizing
430 debug_only(friend class ClassVerifier;)
431
432 // Constructor
433 ConstantPoolCache(int length,
434 const intStack& inverse_index_map,
435 const intStack& invokedynamic_inverse_index_map,
436 const intStack& invokedynamic_references_map);
437
438 // Initialization
439 void initialize(const intArray& inverse_index_map,
440 const intArray& invokedynamic_inverse_index_map,
441 const intArray& invokedynamic_references_map);
442 public:
443 static ConstantPoolCache* allocate(ClassLoaderData* loader_data,
444 const intStack& cp_cache_map,
445 const intStack& invokedynamic_cp_cache_map,
446 const intStack& invokedynamic_references_map, TRAPS);
447 bool is_constantPoolCache() const { return true; }
448
449 int length() const { return _length; }
450 void metaspace_pointers_do(MetaspaceClosure* it);
451 MetaspaceObj::Type type() const { return ConstantPoolCacheType; }
452
453 oop archived_references() NOT_CDS_JAVA_HEAP_RETURN_(NULL);
454 void set_archived_references(oop o) NOT_CDS_JAVA_HEAP_RETURN;
455
456 inline oop resolved_references();
457 void set_resolved_references(OopHandle s) { _resolved_references = s; }
458 Array<u2>* reference_map() const { return _reference_map; }
459 void set_reference_map(Array<u2>* o) { _reference_map = o; }
460
461 // Assembly code support
462 static int resolved_references_offset_in_bytes() { return offset_of(ConstantPoolCache, _resolved_references); }
463
464 // CDS support
465 void remove_unshareable_info();
466 void verify_just_initialized();
|
163 void set_flags(intx flags) { _flags = flags; }
164 void set_field_flags(TosState field_type, int option_bits, int field_index) {
165 assert((field_index & field_index_mask) == field_index, "field_index in range");
166 set_flags(make_flags(field_type, option_bits | (1 << is_field_entry_shift), field_index));
167 }
168 void set_method_flags(TosState return_type, int option_bits, int method_params) {
169 assert((method_params & parameter_size_mask) == method_params, "method_params in range");
170 set_flags(make_flags(return_type, option_bits, method_params));
171 }
172
173 public:
174 // specific bit definitions for the flags field:
175 // (Note: the interpreter must use these definitions to access the CP cache.)
176 enum {
177 // high order bits are the TosState corresponding to field type or method return type
178 tos_state_bits = 4,
179 tos_state_mask = right_n_bits(tos_state_bits),
180 tos_state_shift = BitsPerInt - tos_state_bits, // see verify_tos_state_shift below
181 // misc. option bits; can be any bit position in [16..27]
182 is_field_entry_shift = 26, // (F) is it a field or a method?
183 has_local_signature_shift = 25, // (M) does the call site have a per-site signature (sig-poly methods)?
184 has_appendix_shift = 24, // (A) does the call site have an appendix argument?
185 is_forced_virtual_shift = 23, // (I) is the interface reference forced to virtual mode?
186 is_final_shift = 22, // (f) is the field or method final?
187 is_volatile_shift = 21, // (v) is the field volatile?
188 is_vfinal_shift = 20, // (vf) did the call resolve to a final method?
189 indy_resolution_failed_shift= 19, // (indy_rf) did call site specifier resolution fail ?
190 // low order bits give field index (for FieldInfo) or method parameter size:
191 field_index_bits = 16,
192 field_index_mask = right_n_bits(field_index_bits),
193 parameter_size_bits = 8, // subset of field_index_mask, range is 0..255
194 parameter_size_mask = right_n_bits(parameter_size_bits),
195 option_bits_mask = ~(((~0u) << tos_state_shift) | (field_index_mask | parameter_size_mask))
196 };
197
198 // specific bit definitions for the indices field:
199 enum {
200 cp_index_bits = 2*BitsPerByte,
201 cp_index_mask = right_n_bits(cp_index_bits),
202 bytecode_1_shift = cp_index_bits,
203 bytecode_1_mask = right_n_bits(BitsPerByte), // == (u1)0xFF
274 // null appendix, the argument is not passed at all.
275 //
276 // The appendix is *not* represented in the signature of the symbolic
277 // reference for the call site, but (if present) it *is* represented in
278 // the Method* bound to the site. This means that static and dynamic
279 // resolution logic needs to make slightly different assessments about the
280 // number and types of arguments.
281 void set_method_handle_common(
282 const constantPoolHandle& cpool, // holding constant pool (required for locking)
283 Bytecodes::Code invoke_code, // _invokehandle or _invokedynamic
284 const CallInfo &call_info // Call link information
285 );
286
287 // Return TRUE if resolution failed and this thread got to record the failure
288 // status. Return FALSE if another thread succeeded or failed in resolving
289 // the method and recorded the success or failure before this thread had a
290 // chance to record its failure.
291 bool save_and_throw_indy_exc(const constantPoolHandle& cpool, int cpool_index,
292 int index, constantTag tag, TRAPS);
293
294 // invokedynamic and invokehandle call sites have an "appendix" item in the
295 // resolved references array:
296 Method* method_if_resolved(const constantPoolHandle& cpool);
297 oop appendix_if_resolved(const constantPoolHandle& cpool);
298
299 void set_parameter_size(int value);
300
301 // Which bytecode number (1 or 2) in the index field is valid for this bytecode?
302 // Returns -1 if neither is valid.
303 static int bytecode_number(Bytecodes::Code code) {
304 switch (code) {
305 case Bytecodes::_getstatic : // fall through
306 case Bytecodes::_getfield : // fall through
307 case Bytecodes::_invokespecial : // fall through
308 case Bytecodes::_invokestatic : // fall through
309 case Bytecodes::_invokehandle : // fall through
310 case Bytecodes::_invokedynamic : // fall through
311 case Bytecodes::_invokeinterface : return 1;
312 case Bytecodes::_putstatic : // fall through
313 case Bytecodes::_putfield : // fall through
314 case Bytecodes::_invokevirtual : return 2;
315 default : break;
316 }
317 return -1;
330 Method* f1_as_method() const;
331 Klass* f1_as_klass() const;
332 // Use the accessor f1() to acquire _f1's value. This is needed for
333 // example in BytecodeInterpreter::run(), where is_f1_null() is
334 // called to check if an invokedynamic call is resolved. This load
335 // of _f1 must be ordered with the loads performed by
336 // cache->main_entry_index().
337 bool is_f1_null() const; // classifies a CPC entry as unbound
338 int f2_as_index() const { assert(!is_vfinal(), ""); return (int) _f2; }
339 Method* f2_as_vfinal_method() const { assert(is_vfinal(), ""); return (Method*)_f2; }
340 Method* f2_as_interface_method() const;
341 intx flags_ord() const;
342 int field_index() const { assert(is_field_entry(), ""); return (_flags & field_index_mask); }
343 int parameter_size() const { assert(is_method_entry(), ""); return (_flags & parameter_size_mask); }
344 bool is_volatile() const { return (_flags & (1 << is_volatile_shift)) != 0; }
345 bool is_final() const { return (_flags & (1 << is_final_shift)) != 0; }
346 bool is_forced_virtual() const { return (_flags & (1 << is_forced_virtual_shift)) != 0; }
347 bool is_vfinal() const { return (_flags & (1 << is_vfinal_shift)) != 0; }
348 bool indy_resolution_failed() const;
349 bool has_appendix() const;
350 bool has_local_signature() const;
351 bool is_method_entry() const { return (_flags & (1 << is_field_entry_shift)) == 0; }
352 bool is_field_entry() const { return (_flags & (1 << is_field_entry_shift)) != 0; }
353 bool is_long() const { return flag_state() == ltos; }
354 bool is_double() const { return flag_state() == dtos; }
355 TosState flag_state() const { assert((uint)number_of_states <= (uint)tos_state_mask+1, "");
356 return (TosState)((_flags >> tos_state_shift) & tos_state_mask); }
357 void set_indy_resolution_failed();
358
359 // Code generation support
360 static WordSize size() {
361 return in_WordSize(align_up((int)sizeof(ConstantPoolCacheEntry), wordSize) / wordSize);
362 }
363 static ByteSize size_in_bytes() { return in_ByteSize(sizeof(ConstantPoolCacheEntry)); }
364 static ByteSize indices_offset() { return byte_offset_of(ConstantPoolCacheEntry, _indices); }
365 static ByteSize f1_offset() { return byte_offset_of(ConstantPoolCacheEntry, _f1); }
366 static ByteSize f2_offset() { return byte_offset_of(ConstantPoolCacheEntry, _f2); }
367 static ByteSize flags_offset() { return byte_offset_of(ConstantPoolCacheEntry, _flags); }
368
369 #if INCLUDE_JVMTI
370 // RedefineClasses() API support:
417 // time when caching java heap object is supported.
418 CDS_JAVA_HEAP_ONLY(narrowOop _archived_references;)
419
420 // Sizing
421 debug_only(friend class ClassVerifier;)
422
423 // Constructor
424 ConstantPoolCache(int length,
425 const intStack& inverse_index_map,
426 const intStack& invokedynamic_inverse_index_map,
427 const intStack& invokedynamic_references_map);
428
429 // Initialization
430 void initialize(const intArray& inverse_index_map,
431 const intArray& invokedynamic_inverse_index_map,
432 const intArray& invokedynamic_references_map);
433 public:
434 static ConstantPoolCache* allocate(ClassLoaderData* loader_data,
435 const intStack& cp_cache_map,
436 const intStack& invokedynamic_cp_cache_map,
437 const intStack& appendix_references_map, TRAPS);
438 bool is_constantPoolCache() const { return true; }
439
440 int length() const { return _length; }
441 void metaspace_pointers_do(MetaspaceClosure* it);
442 MetaspaceObj::Type type() const { return ConstantPoolCacheType; }
443
444 oop archived_references() NOT_CDS_JAVA_HEAP_RETURN_(NULL);
445 void set_archived_references(oop o) NOT_CDS_JAVA_HEAP_RETURN;
446
447 inline oop resolved_references();
448 void set_resolved_references(OopHandle s) { _resolved_references = s; }
449 Array<u2>* reference_map() const { return _reference_map; }
450 void set_reference_map(Array<u2>* o) { _reference_map = o; }
451
452 // Assembly code support
453 static int resolved_references_offset_in_bytes() { return offset_of(ConstantPoolCache, _resolved_references); }
454
455 // CDS support
456 void remove_unshareable_info();
457 void verify_just_initialized();
|