truffle: src/share/vm/ci/ciField.cpp annotate

annotate src/share/vm/ci/ciField.cpp @ 12264:b2e698d2276c

8014013: CallInfo structure no longer accurately reports the result of a LinkResolver operation Summary: Enhance method resolution and resulting data structures, plus some refactoring. Reviewed-by: twisti, acorn, jrose

author	drchase
date	Fri, 13 Sep 2013 22:38:02 -0400
parents	edb5ab0f3fe5
children	cefad50507d8 63a4eb8bcd23 00cf2b6f51b9

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
12264 b2e698d2276c 8014013: CallInfo structure no longer accurately reports the result of a LinkResolver operation drchase parents: 12190 diff changeset	2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
0 a61af66fc99e Initial load duke parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
a61af66fc99e Initial load duke parents: diff changeset	4 *
a61af66fc99e Initial load duke parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
a61af66fc99e Initial load duke parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
a61af66fc99e Initial load duke parents: diff changeset	7 * published by the Free Software Foundation.
a61af66fc99e Initial load duke parents: diff changeset	8 *
a61af66fc99e Initial load duke parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
a61af66fc99e Initial load duke parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a61af66fc99e Initial load duke parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a61af66fc99e Initial load duke parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
a61af66fc99e Initial load duke parents: diff changeset	13 * accompanied this code).
a61af66fc99e Initial load duke parents: diff changeset	14 *
a61af66fc99e Initial load duke parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
a61af66fc99e Initial load duke parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
a61af66fc99e Initial load duke parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
a61af66fc99e Initial load duke parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1173 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1173 diff changeset	20 * or visit www.oracle.com if you need additional information or have any
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1173 diff changeset	21 * questions.
0 a61af66fc99e Initial load duke parents: diff changeset	22 *
a61af66fc99e Initial load duke parents: diff changeset	23 */
a61af66fc99e Initial load duke parents: diff changeset	24
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1682 diff changeset	25 #include "precompiled.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1682 diff changeset	26 #include "ci/ciField.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1682 diff changeset	27 #include "ci/ciInstanceKlass.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1682 diff changeset	28 #include "ci/ciUtilities.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1682 diff changeset	29 #include "classfile/systemDictionary.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1682 diff changeset	30 #include "gc_interface/collectedHeap.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1682 diff changeset	31 #include "interpreter/linkResolver.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1682 diff changeset	32 #include "memory/universe.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1682 diff changeset	33 #include "oops/oop.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1682 diff changeset	34 #include "oops/oop.inline2.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1682 diff changeset	35 #include "runtime/fieldDescriptor.hpp"
0 a61af66fc99e Initial load duke parents: diff changeset	36
a61af66fc99e Initial load duke parents: diff changeset	37 // ciField
a61af66fc99e Initial load duke parents: diff changeset	38 //
a61af66fc99e Initial load duke parents: diff changeset	39 // This class represents the result of a field lookup in the VM.
a61af66fc99e Initial load duke parents: diff changeset	40 // The lookup may not succeed, in which case the information in
a61af66fc99e Initial load duke parents: diff changeset	41 // the ciField will be incomplete.
a61af66fc99e Initial load duke parents: diff changeset	42
a61af66fc99e Initial load duke parents: diff changeset	43 // The ciObjectFactory cannot create circular data structures in one query.
a61af66fc99e Initial load duke parents: diff changeset	44 // To avoid vicious circularities, we initialize ciField::_type to NULL
a61af66fc99e Initial load duke parents: diff changeset	45 // for reference types and derive it lazily from the ciField::_signature.
a61af66fc99e Initial load duke parents: diff changeset	46 // Primitive types are eagerly initialized, and basic layout queries
a61af66fc99e Initial load duke parents: diff changeset	47 // can succeed without initialization, using only the BasicType of the field.
a61af66fc99e Initial load duke parents: diff changeset	48
a61af66fc99e Initial load duke parents: diff changeset	49 // Notes on bootstrapping and shared CI objects: A field is shared if and
a61af66fc99e Initial load duke parents: diff changeset	50 // only if it is (a) non-static and (b) declared by a shared instance klass.
a61af66fc99e Initial load duke parents: diff changeset	51 // This allows non-static field lists to be cached on shared types.
a61af66fc99e Initial load duke parents: diff changeset	52 // Because the _type field is lazily initialized, however, there is a
a61af66fc99e Initial load duke parents: diff changeset	53 // special restriction that a shared field cannot cache an unshared type.
a61af66fc99e Initial load duke parents: diff changeset	54 // This puts a small performance penalty on shared fields with unshared
a61af66fc99e Initial load duke parents: diff changeset	55 // types, such as StackTraceElement[] Throwable.stackTrace.
a61af66fc99e Initial load duke parents: diff changeset	56 // (Throwable is shared because ClassCastException is shared, but
a61af66fc99e Initial load duke parents: diff changeset	57 // StackTraceElement is not presently shared.)
a61af66fc99e Initial load duke parents: diff changeset	58
a61af66fc99e Initial load duke parents: diff changeset	59 // It is not a vicious circularity for a ciField to recursively create
a61af66fc99e Initial load duke parents: diff changeset	60 // the ciSymbols necessary to represent its name and signature.
a61af66fc99e Initial load duke parents: diff changeset	61 // Therefore, these items are created eagerly, and the name and signature
a61af66fc99e Initial load duke parents: diff changeset	62 // of a shared field are themselves shared symbols. This somewhat
a61af66fc99e Initial load duke parents: diff changeset	63 // pollutes the set of shared CI objects: It grows from 50 to 93 items,
a61af66fc99e Initial load duke parents: diff changeset	64 // with all of the additional 43 being uninteresting shared ciSymbols.
a61af66fc99e Initial load duke parents: diff changeset	65 // This adds at most one step to the binary search, an amount which
a61af66fc99e Initial load duke parents: diff changeset	66 // decreases for complex compilation tasks.
a61af66fc99e Initial load duke parents: diff changeset	67
a61af66fc99e Initial load duke parents: diff changeset	68 // ------------------------------------------------------------------
a61af66fc99e Initial load duke parents: diff changeset	69 // ciField::ciField
6151 e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	70 ciField::ciField(ciInstanceKlass* klass, int index): _known_to_link_with_put(NULL), _known_to_link_with_get(NULL) {
0 a61af66fc99e Initial load duke parents: diff changeset	71 ASSERT_IN_VM;
a61af66fc99e Initial load duke parents: diff changeset	72 CompilerThread *thread = CompilerThread::current();
a61af66fc99e Initial load duke parents: diff changeset	73
a61af66fc99e Initial load duke parents: diff changeset	74 assert(ciObjectFactory::is_initialized(), "not a shared field");
a61af66fc99e Initial load duke parents: diff changeset	75
a61af66fc99e Initial load duke parents: diff changeset	76 assert(klass->get_instanceKlass()->is_linked(), "must be linked before using its constan-pool");
a61af66fc99e Initial load duke parents: diff changeset	77
a61af66fc99e Initial load duke parents: diff changeset	78 constantPoolHandle cpool(thread, klass->get_instanceKlass()->constants());
a61af66fc99e Initial load duke parents: diff changeset	79
a61af66fc99e Initial load duke parents: diff changeset	80 // Get the field's name, signature, and type.
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	81 Symbol* name = cpool->name_ref_at(index);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	82 _name = ciEnv::current(thread)->get_symbol(name);
0 a61af66fc99e Initial load duke parents: diff changeset	83
a61af66fc99e Initial load duke parents: diff changeset	84 int nt_index = cpool->name_and_type_ref_index_at(index);
a61af66fc99e Initial load duke parents: diff changeset	85 int sig_index = cpool->signature_ref_index_at(nt_index);
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	86 Symbol* signature = cpool->symbol_at(sig_index);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	87 _signature = ciEnv::current(thread)->get_symbol(signature);
0 a61af66fc99e Initial load duke parents: diff changeset	88
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	89 BasicType field_type = FieldType::basic_type(signature);
0 a61af66fc99e Initial load duke parents: diff changeset	90
a61af66fc99e Initial load duke parents: diff changeset	91 // If the field is a pointer type, get the klass of the
a61af66fc99e Initial load duke parents: diff changeset	92 // field.
a61af66fc99e Initial load duke parents: diff changeset	93 if (field_type == T_OBJECT \|\| field_type == T_ARRAY) {
a61af66fc99e Initial load duke parents: diff changeset	94 bool ignore;
a61af66fc99e Initial load duke parents: diff changeset	95 // This is not really a class reference; the index always refers to the
a61af66fc99e Initial load duke parents: diff changeset	96 // field's type signature, as a symbol. Linkage checks do not apply.
1138 dd57230ba8fe 6893268: additional dynamic language related optimizations in C2 twisti parents: 0 diff changeset	97 _type = ciEnv::current(thread)->get_klass_by_index(cpool, sig_index, ignore, klass);
0 a61af66fc99e Initial load duke parents: diff changeset	98 } else {
a61af66fc99e Initial load duke parents: diff changeset	99 _type = ciType::make(field_type);
a61af66fc99e Initial load duke parents: diff changeset	100 }
a61af66fc99e Initial load duke parents: diff changeset	101
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	102 _name = (ciSymbol*)ciEnv::current(thread)->get_symbol(name);
0 a61af66fc99e Initial load duke parents: diff changeset	103
a61af66fc99e Initial load duke parents: diff changeset	104 // Get the field's declared holder.
a61af66fc99e Initial load duke parents: diff changeset	105 //
a61af66fc99e Initial load duke parents: diff changeset	106 // Note: we actually create a ciInstanceKlass for this klass,
a61af66fc99e Initial load duke parents: diff changeset	107 // even though we may not need to.
a61af66fc99e Initial load duke parents: diff changeset	108 int holder_index = cpool->klass_ref_index_at(index);
a61af66fc99e Initial load duke parents: diff changeset	109 bool holder_is_accessible;
a61af66fc99e Initial load duke parents: diff changeset	110 ciInstanceKlass* declared_holder =
1138 dd57230ba8fe 6893268: additional dynamic language related optimizations in C2 twisti parents: 0 diff changeset	111 ciEnv::current(thread)->get_klass_by_index(cpool, holder_index,
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2 twisti parents: 0 diff changeset	112 holder_is_accessible,
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2 twisti parents: 0 diff changeset	113 klass)->as_instance_klass();
0 a61af66fc99e Initial load duke parents: diff changeset	114
a61af66fc99e Initial load duke parents: diff changeset	115 // The declared holder of this field may not have been loaded.
a61af66fc99e Initial load duke parents: diff changeset	116 // Bail out with partial field information.
a61af66fc99e Initial load duke parents: diff changeset	117 if (!holder_is_accessible) {
12264 b2e698d2276c 8014013: CallInfo structure no longer accurately reports the result of a LinkResolver operation drchase parents: 12190 diff changeset	118 // _type has already been set.
0 a61af66fc99e Initial load duke parents: diff changeset	119 // The default values for _flags and _constant_value will suffice.
a61af66fc99e Initial load duke parents: diff changeset	120 // We need values for _holder, _offset, and _is_constant,
a61af66fc99e Initial load duke parents: diff changeset	121 _holder = declared_holder;
a61af66fc99e Initial load duke parents: diff changeset	122 _offset = -1;
a61af66fc99e Initial load duke parents: diff changeset	123 _is_constant = false;
a61af66fc99e Initial load duke parents: diff changeset	124 return;
a61af66fc99e Initial load duke parents: diff changeset	125 }
a61af66fc99e Initial load duke parents: diff changeset	126
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6153 diff changeset	127 InstanceKlass* loaded_decl_holder = declared_holder->get_instanceKlass();
0 a61af66fc99e Initial load duke parents: diff changeset	128
a61af66fc99e Initial load duke parents: diff changeset	129 // Perform the field lookup.
a61af66fc99e Initial load duke parents: diff changeset	130 fieldDescriptor field_desc;
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6153 diff changeset	131 Klass* canonical_holder =
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	132 loaded_decl_holder->find_field(name, signature, &field_desc);
0 a61af66fc99e Initial load duke parents: diff changeset	133 if (canonical_holder == NULL) {
a61af66fc99e Initial load duke parents: diff changeset	134 // Field lookup failed. Will be detected by will_link.
a61af66fc99e Initial load duke parents: diff changeset	135 _holder = declared_holder;
a61af66fc99e Initial load duke parents: diff changeset	136 _offset = -1;
a61af66fc99e Initial load duke parents: diff changeset	137 _is_constant = false;
a61af66fc99e Initial load duke parents: diff changeset	138 return;
a61af66fc99e Initial load duke parents: diff changeset	139 }
a61af66fc99e Initial load duke parents: diff changeset	140
a61af66fc99e Initial load duke parents: diff changeset	141 assert(canonical_holder == field_desc.field_holder(), "just checking");
a61af66fc99e Initial load duke parents: diff changeset	142 initialize_from(&field_desc);
a61af66fc99e Initial load duke parents: diff changeset	143 }
a61af66fc99e Initial load duke parents: diff changeset	144
6151 e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	145 ciField::ciField(fieldDescriptor *fd): _known_to_link_with_put(NULL), _known_to_link_with_get(NULL) {
0 a61af66fc99e Initial load duke parents: diff changeset	146 ASSERT_IN_VM;
a61af66fc99e Initial load duke parents: diff changeset	147
a61af66fc99e Initial load duke parents: diff changeset	148 // Get the field's name, signature, and type.
a61af66fc99e Initial load duke parents: diff changeset	149 ciEnv* env = CURRENT_ENV;
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	150 _name = env->get_symbol(fd->name());
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	151 _signature = env->get_symbol(fd->signature());
0 a61af66fc99e Initial load duke parents: diff changeset	152
a61af66fc99e Initial load duke parents: diff changeset	153 BasicType field_type = fd->field_type();
a61af66fc99e Initial load duke parents: diff changeset	154
a61af66fc99e Initial load duke parents: diff changeset	155 // If the field is a pointer type, get the klass of the
a61af66fc99e Initial load duke parents: diff changeset	156 // field.
a61af66fc99e Initial load duke parents: diff changeset	157 if (field_type == T_OBJECT \|\| field_type == T_ARRAY) {
a61af66fc99e Initial load duke parents: diff changeset	158 _type = NULL; // must call compute_type on first access
a61af66fc99e Initial load duke parents: diff changeset	159 } else {
a61af66fc99e Initial load duke parents: diff changeset	160 _type = ciType::make(field_type);
a61af66fc99e Initial load duke parents: diff changeset	161 }
a61af66fc99e Initial load duke parents: diff changeset	162
a61af66fc99e Initial load duke parents: diff changeset	163 initialize_from(fd);
a61af66fc99e Initial load duke parents: diff changeset	164
a61af66fc99e Initial load duke parents: diff changeset	165 // Either (a) it is marked shared, or else (b) we are done bootstrapping.
a61af66fc99e Initial load duke parents: diff changeset	166 assert(is_shared() \|\| ciObjectFactory::is_initialized(),
a61af66fc99e Initial load duke parents: diff changeset	167 "bootstrap classes must not create & cache unshared fields");
a61af66fc99e Initial load duke parents: diff changeset	168 }
a61af66fc99e Initial load duke parents: diff changeset	169
1173 73b22f919c34 6912065: final fields in objects need to support inlining optimizations for JSR 292 jrose parents: 1142 diff changeset	170 static bool trust_final_non_static_fields(ciInstanceKlass* holder) {
73b22f919c34 6912065: final fields in objects need to support inlining optimizations for JSR 292 jrose parents: 1142 diff changeset	171 if (holder == NULL)
73b22f919c34 6912065: final fields in objects need to support inlining optimizations for JSR 292 jrose parents: 1142 diff changeset	172 return false;
73b22f919c34 6912065: final fields in objects need to support inlining optimizations for JSR 292 jrose parents: 1142 diff changeset	173 if (holder->name() == ciSymbol::java_lang_System())
73b22f919c34 6912065: final fields in objects need to support inlining optimizations for JSR 292 jrose parents: 1142 diff changeset	174 // Never trust strangely unstable finals: System.out, etc.
73b22f919c34 6912065: final fields in objects need to support inlining optimizations for JSR 292 jrose parents: 1142 diff changeset	175 return false;
73b22f919c34 6912065: final fields in objects need to support inlining optimizations for JSR 292 jrose parents: 1142 diff changeset	176 // Even if general trusting is disabled, trust system-built closures in these packages.
2357 8033953d67ff 7012648: move JSR 292 to package java.lang.invoke and adjust names jrose parents: 2261 diff changeset	177 if (holder->is_in_package("java/lang/invoke") \|\| holder->is_in_package("sun/invoke"))
1173 73b22f919c34 6912065: final fields in objects need to support inlining optimizations for JSR 292 jrose parents: 1142 diff changeset	178 return true;
73b22f919c34 6912065: final fields in objects need to support inlining optimizations for JSR 292 jrose parents: 1142 diff changeset	179 return TrustFinalNonStaticFields;
73b22f919c34 6912065: final fields in objects need to support inlining optimizations for JSR 292 jrose parents: 1142 diff changeset	180 }
73b22f919c34 6912065: final fields in objects need to support inlining optimizations for JSR 292 jrose parents: 1142 diff changeset	181
0 a61af66fc99e Initial load duke parents: diff changeset	182 void ciField::initialize_from(fieldDescriptor* fd) {
a61af66fc99e Initial load duke parents: diff changeset	183 // Get the flags, offset, and canonical holder of the field.
a61af66fc99e Initial load duke parents: diff changeset	184 _flags = ciFlags(fd->access_flags());
a61af66fc99e Initial load duke parents: diff changeset	185 _offset = fd->offset();
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6153 diff changeset	186 _holder = CURRENT_ENV->get_instance_klass(fd->field_holder());
0 a61af66fc99e Initial load duke parents: diff changeset	187
a61af66fc99e Initial load duke parents: diff changeset	188 // Check to see if the field is constant.
12190 edb5ab0f3fe5 8001107: @Stable annotation for constant folding of lazily evaluated variables vlivanov parents: 7421 diff changeset	189 bool is_final = this->is_final();
edb5ab0f3fe5 8001107: @Stable annotation for constant folding of lazily evaluated variables vlivanov parents: 7421 diff changeset	190 bool is_stable = FoldStableValues && this->is_stable();
edb5ab0f3fe5 8001107: @Stable annotation for constant folding of lazily evaluated variables vlivanov parents: 7421 diff changeset	191 if (_holder->is_initialized() && (is_final \|\| is_stable)) {
1138 dd57230ba8fe 6893268: additional dynamic language related optimizations in C2 twisti parents: 0 diff changeset	192 if (!this->is_static()) {
2357 8033953d67ff 7012648: move JSR 292 to package java.lang.invoke and adjust names jrose parents: 2261 diff changeset	193 // A field can be constant if it's a final static field or if
8033953d67ff 7012648: move JSR 292 to package java.lang.invoke and adjust names jrose parents: 2261 diff changeset	194 // it's a final non-static field of a trusted class (classes in
8033953d67ff 7012648: move JSR 292 to package java.lang.invoke and adjust names jrose parents: 2261 diff changeset	195 // java.lang.invoke and sun.invoke packages and subpackages).
12190 edb5ab0f3fe5 8001107: @Stable annotation for constant folding of lazily evaluated variables vlivanov parents: 7421 diff changeset	196 if (is_stable \|\| trust_final_non_static_fields(_holder)) {
1138 dd57230ba8fe 6893268: additional dynamic language related optimizations in C2 twisti parents: 0 diff changeset	197 _is_constant = true;
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2 twisti parents: 0 diff changeset	198 return;
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2 twisti parents: 0 diff changeset	199 }
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2 twisti parents: 0 diff changeset	200 _is_constant = false;
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2 twisti parents: 0 diff changeset	201 return;
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2 twisti parents: 0 diff changeset	202 }
dd57230ba8fe 6893268: additional dynamic language related optimizations in C2 twisti parents: 0 diff changeset	203
0 a61af66fc99e Initial load duke parents: diff changeset	204 // This field just may be constant. The only cases where it will
a61af66fc99e Initial load duke parents: diff changeset	205 // not be constant are:
a61af66fc99e Initial load duke parents: diff changeset	206 //
a61af66fc99e Initial load duke parents: diff changeset	207 // 1. The field holds a non-perm-space oop. The field is, strictly
a61af66fc99e Initial load duke parents: diff changeset	208 // speaking, constant but we cannot embed non-perm-space oops into
a61af66fc99e Initial load duke parents: diff changeset	209 // generated code. For the time being we need to consider the
a61af66fc99e Initial load duke parents: diff changeset	210 // field to be not constant.
a61af66fc99e Initial load duke parents: diff changeset	211 // 2. The field is a special static&final field whose value
a61af66fc99e Initial load duke parents: diff changeset	212 // may change. The three examples are java.lang.System.in,
a61af66fc99e Initial load duke parents: diff changeset	213 // java.lang.System.out, and java.lang.System.err.
a61af66fc99e Initial load duke parents: diff changeset	214
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6153 diff changeset	215 KlassHandle k = _holder->get_Klass();
1142 4ce7240d622c 6914300: ciEnv should export all well known classes never parents: 1138 diff changeset	216 assert( SystemDictionary::System_klass() != NULL, "Check once per vm");
2261 1957c1478794 7019819: bare oop in ciField never parents: 2177 diff changeset	217 if( k() == SystemDictionary::System_klass() ) {
0 a61af66fc99e Initial load duke parents: diff changeset	218 // Check offsets for case 2: System.in, System.out, or System.err
a61af66fc99e Initial load duke parents: diff changeset	219 if( _offset == java_lang_System::in_offset_in_bytes() \|\|
a61af66fc99e Initial load duke parents: diff changeset	220 _offset == java_lang_System::out_offset_in_bytes() \|\|
a61af66fc99e Initial load duke parents: diff changeset	221 _offset == java_lang_System::err_offset_in_bytes() ) {
a61af66fc99e Initial load duke parents: diff changeset	222 _is_constant = false;
a61af66fc99e Initial load duke parents: diff changeset	223 return;
a61af66fc99e Initial load duke parents: diff changeset	224 }
a61af66fc99e Initial load duke parents: diff changeset	225 }
a61af66fc99e Initial load duke parents: diff changeset	226
2376 c7f3d0b4570f 7017732: move static fields into Class to prepare for perm gen removal never parents: 2357 diff changeset	227 Handle mirror = k->java_mirror();
c7f3d0b4570f 7017732: move static fields into Class to prepare for perm gen removal never parents: 2357 diff changeset	228
0 a61af66fc99e Initial load duke parents: diff changeset	229 switch(type()->basic_type()) {
a61af66fc99e Initial load duke parents: diff changeset	230 case T_BYTE:
2376 c7f3d0b4570f 7017732: move static fields into Class to prepare for perm gen removal never parents: 2357 diff changeset	231 _constant_value = ciConstant(type()->basic_type(), mirror->byte_field(_offset));
0 a61af66fc99e Initial load duke parents: diff changeset	232 break;
a61af66fc99e Initial load duke parents: diff changeset	233 case T_CHAR:
2376 c7f3d0b4570f 7017732: move static fields into Class to prepare for perm gen removal never parents: 2357 diff changeset	234 _constant_value = ciConstant(type()->basic_type(), mirror->char_field(_offset));
0 a61af66fc99e Initial load duke parents: diff changeset	235 break;
a61af66fc99e Initial load duke parents: diff changeset	236 case T_SHORT:
2376 c7f3d0b4570f 7017732: move static fields into Class to prepare for perm gen removal never parents: 2357 diff changeset	237 _constant_value = ciConstant(type()->basic_type(), mirror->short_field(_offset));
0 a61af66fc99e Initial load duke parents: diff changeset	238 break;
a61af66fc99e Initial load duke parents: diff changeset	239 case T_BOOLEAN:
2376 c7f3d0b4570f 7017732: move static fields into Class to prepare for perm gen removal never parents: 2357 diff changeset	240 _constant_value = ciConstant(type()->basic_type(), mirror->bool_field(_offset));
0 a61af66fc99e Initial load duke parents: diff changeset	241 break;
a61af66fc99e Initial load duke parents: diff changeset	242 case T_INT:
2376 c7f3d0b4570f 7017732: move static fields into Class to prepare for perm gen removal never parents: 2357 diff changeset	243 _constant_value = ciConstant(type()->basic_type(), mirror->int_field(_offset));
0 a61af66fc99e Initial load duke parents: diff changeset	244 break;
a61af66fc99e Initial load duke parents: diff changeset	245 case T_FLOAT:
2376 c7f3d0b4570f 7017732: move static fields into Class to prepare for perm gen removal never parents: 2357 diff changeset	246 _constant_value = ciConstant(mirror->float_field(_offset));
0 a61af66fc99e Initial load duke parents: diff changeset	247 break;
a61af66fc99e Initial load duke parents: diff changeset	248 case T_DOUBLE:
2376 c7f3d0b4570f 7017732: move static fields into Class to prepare for perm gen removal never parents: 2357 diff changeset	249 _constant_value = ciConstant(mirror->double_field(_offset));
0 a61af66fc99e Initial load duke parents: diff changeset	250 break;
a61af66fc99e Initial load duke parents: diff changeset	251 case T_LONG:
2376 c7f3d0b4570f 7017732: move static fields into Class to prepare for perm gen removal never parents: 2357 diff changeset	252 _constant_value = ciConstant(mirror->long_field(_offset));
0 a61af66fc99e Initial load duke parents: diff changeset	253 break;
a61af66fc99e Initial load duke parents: diff changeset	254 case T_OBJECT:
a61af66fc99e Initial load duke parents: diff changeset	255 case T_ARRAY:
a61af66fc99e Initial load duke parents: diff changeset	256 {
2376 c7f3d0b4570f 7017732: move static fields into Class to prepare for perm gen removal never parents: 2357 diff changeset	257 oop o = mirror->obj_field(_offset);
0 a61af66fc99e Initial load duke parents: diff changeset	258
a61af66fc99e Initial load duke parents: diff changeset	259 // A field will be "constant" if it is known always to be
a61af66fc99e Initial load duke parents: diff changeset	260 // a non-null reference to an instance of a particular class,
a61af66fc99e Initial load duke parents: diff changeset	261 // or to a particular array. This can happen even if the instance
a61af66fc99e Initial load duke parents: diff changeset	262 // or array is not perm. In such a case, an "unloaded" ciArray
a61af66fc99e Initial load duke parents: diff changeset	263 // or ciInstance is created. The compiler may be able to use
a61af66fc99e Initial load duke parents: diff changeset	264 // information about the object's class (which is exact) or length.
a61af66fc99e Initial load duke parents: diff changeset	265
a61af66fc99e Initial load duke parents: diff changeset	266 if (o == NULL) {
a61af66fc99e Initial load duke parents: diff changeset	267 _constant_value = ciConstant(type()->basic_type(), ciNullObject::make());
a61af66fc99e Initial load duke parents: diff changeset	268 } else {
a61af66fc99e Initial load duke parents: diff changeset	269 _constant_value = ciConstant(type()->basic_type(), CURRENT_ENV->get_object(o));
a61af66fc99e Initial load duke parents: diff changeset	270 assert(_constant_value.as_object() == CURRENT_ENV->get_object(o), "check interning");
a61af66fc99e Initial load duke parents: diff changeset	271 }
a61af66fc99e Initial load duke parents: diff changeset	272 }
a61af66fc99e Initial load duke parents: diff changeset	273 }
12190 edb5ab0f3fe5 8001107: @Stable annotation for constant folding of lazily evaluated variables vlivanov parents: 7421 diff changeset	274 if (is_stable && _constant_value.is_null_or_zero()) {
edb5ab0f3fe5 8001107: @Stable annotation for constant folding of lazily evaluated variables vlivanov parents: 7421 diff changeset	275 // It is not a constant after all; treat it as uninitialized.
edb5ab0f3fe5 8001107: @Stable annotation for constant folding of lazily evaluated variables vlivanov parents: 7421 diff changeset	276 _is_constant = false;
edb5ab0f3fe5 8001107: @Stable annotation for constant folding of lazily evaluated variables vlivanov parents: 7421 diff changeset	277 } else {
edb5ab0f3fe5 8001107: @Stable annotation for constant folding of lazily evaluated variables vlivanov parents: 7421 diff changeset	278 _is_constant = true;
edb5ab0f3fe5 8001107: @Stable annotation for constant folding of lazily evaluated variables vlivanov parents: 7421 diff changeset	279 }
0 a61af66fc99e Initial load duke parents: diff changeset	280 } else {
a61af66fc99e Initial load duke parents: diff changeset	281 _is_constant = false;
a61af66fc99e Initial load duke parents: diff changeset	282 }
a61af66fc99e Initial load duke parents: diff changeset	283 }
a61af66fc99e Initial load duke parents: diff changeset	284
a61af66fc99e Initial load duke parents: diff changeset	285 // ------------------------------------------------------------------
a61af66fc99e Initial load duke parents: diff changeset	286 // ciField::compute_type
a61af66fc99e Initial load duke parents: diff changeset	287 //
a61af66fc99e Initial load duke parents: diff changeset	288 // Lazily compute the type, if it is an instance klass.
a61af66fc99e Initial load duke parents: diff changeset	289 ciType* ciField::compute_type() {
a61af66fc99e Initial load duke parents: diff changeset	290 GUARDED_VM_ENTRY(return compute_type_impl();)
a61af66fc99e Initial load duke parents: diff changeset	291 }
a61af66fc99e Initial load duke parents: diff changeset	292
a61af66fc99e Initial load duke parents: diff changeset	293 ciType* ciField::compute_type_impl() {
3785 ddd894528dbc 7056328: JSR 292 invocation sometimes fails in adapters for types not on boot class path jrose parents: 2376 diff changeset	294 ciKlass* type = CURRENT_ENV->get_klass_by_name_impl(_holder, constantPoolHandle(), _signature, false);
0 a61af66fc99e Initial load duke parents: diff changeset	295 if (!type->is_primitive_type() && is_shared()) {
a61af66fc99e Initial load duke parents: diff changeset	296 // We must not cache a pointer to an unshared type, in a shared field.
a61af66fc99e Initial load duke parents: diff changeset	297 bool type_is_also_shared = false;
a61af66fc99e Initial load duke parents: diff changeset	298 if (type->is_type_array_klass()) {
a61af66fc99e Initial load duke parents: diff changeset	299 type_is_also_shared = true; // int[] etc. are explicitly bootstrapped
a61af66fc99e Initial load duke parents: diff changeset	300 } else if (type->is_instance_klass()) {
a61af66fc99e Initial load duke parents: diff changeset	301 type_is_also_shared = type->as_instance_klass()->is_shared();
a61af66fc99e Initial load duke parents: diff changeset	302 } else {
a61af66fc99e Initial load duke parents: diff changeset	303 // Currently there is no 'shared' query for array types.
a61af66fc99e Initial load duke parents: diff changeset	304 type_is_also_shared = !ciObjectFactory::is_initialized();
a61af66fc99e Initial load duke parents: diff changeset	305 }
a61af66fc99e Initial load duke parents: diff changeset	306 if (!type_is_also_shared)
a61af66fc99e Initial load duke parents: diff changeset	307 return type; // Bummer.
a61af66fc99e Initial load duke parents: diff changeset	308 }
a61af66fc99e Initial load duke parents: diff changeset	309 _type = type;
a61af66fc99e Initial load duke parents: diff changeset	310 return type;
a61af66fc99e Initial load duke parents: diff changeset	311 }
a61af66fc99e Initial load duke parents: diff changeset	312
a61af66fc99e Initial load duke parents: diff changeset	313
a61af66fc99e Initial load duke parents: diff changeset	314 // ------------------------------------------------------------------
a61af66fc99e Initial load duke parents: diff changeset	315 // ciField::will_link
a61af66fc99e Initial load duke parents: diff changeset	316 //
a61af66fc99e Initial load duke parents: diff changeset	317 // Can a specific access to this field be made without causing
a61af66fc99e Initial load duke parents: diff changeset	318 // link errors?
a61af66fc99e Initial load duke parents: diff changeset	319 bool ciField::will_link(ciInstanceKlass* accessing_klass,
a61af66fc99e Initial load duke parents: diff changeset	320 Bytecodes::Code bc) {
a61af66fc99e Initial load duke parents: diff changeset	321 VM_ENTRY_MARK;
6151 e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	322 assert(bc == Bytecodes::_getstatic \|\| bc == Bytecodes::_putstatic \|\|
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	323 bc == Bytecodes::_getfield \|\| bc == Bytecodes::_putfield,
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	324 "unexpected bytecode");
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	325
0 a61af66fc99e Initial load duke parents: diff changeset	326 if (_offset == -1) {
a61af66fc99e Initial load duke parents: diff changeset	327 // at creation we couldn't link to our holder so we need to
a61af66fc99e Initial load duke parents: diff changeset	328 // maintain that stance, otherwise there's no safe way to use this
a61af66fc99e Initial load duke parents: diff changeset	329 // ciField.
a61af66fc99e Initial load duke parents: diff changeset	330 return false;
a61af66fc99e Initial load duke parents: diff changeset	331 }
a61af66fc99e Initial load duke parents: diff changeset	332
6151 e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	333 // Check for static/nonstatic mismatch
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	334 bool is_static = (bc == Bytecodes::_getstatic \|\| bc == Bytecodes::_putstatic);
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	335 if (is_static != this->is_static()) {
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	336 return false;
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	337 }
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	338
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	339 // Get and put can have different accessibility rules
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	340 bool is_put = (bc == Bytecodes::_putfield \|\| bc == Bytecodes::_putstatic);
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	341 if (is_put) {
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	342 if (_known_to_link_with_put == accessing_klass) {
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	343 return true;
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	344 }
6153 aa07e41a9f80 7160677: missing else in fix for 7152811 never parents: 6151 diff changeset	345 } else {
6151 e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	346 if (_known_to_link_with_get == accessing_klass) {
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	347 return true;
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	348 }
0 a61af66fc99e Initial load duke parents: diff changeset	349 }
a61af66fc99e Initial load duke parents: diff changeset	350
12264 b2e698d2276c 8014013: CallInfo structure no longer accurately reports the result of a LinkResolver operation drchase parents: 12190 diff changeset	351 fieldDescriptor result;
b2e698d2276c 8014013: CallInfo structure no longer accurately reports the result of a LinkResolver operation drchase parents: 12190 diff changeset	352 LinkResolver::resolve_field(result, _holder->get_instanceKlass(),
b2e698d2276c 8014013: CallInfo structure no longer accurately reports the result of a LinkResolver operation drchase parents: 12190 diff changeset	353 _name->get_symbol(), _signature->get_symbol(),
b2e698d2276c 8014013: CallInfo structure no longer accurately reports the result of a LinkResolver operation drchase parents: 12190 diff changeset	354 accessing_klass->get_Klass(), bc, true, false,
b2e698d2276c 8014013: CallInfo structure no longer accurately reports the result of a LinkResolver operation drchase parents: 12190 diff changeset	355 KILL_COMPILE_ON_FATAL_(false));
0 a61af66fc99e Initial load duke parents: diff changeset	356
a61af66fc99e Initial load duke parents: diff changeset	357 // update the hit-cache, unless there is a problem with memory scoping:
6151 e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	358 if (accessing_klass->is_shared() \|\| !is_shared()) {
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	359 if (is_put) {
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	360 _known_to_link_with_put = accessing_klass;
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	361 } else {
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	362 _known_to_link_with_get = accessing_klass;
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	363 }
e778c29768e6 7152811: Issues in client compiler never parents: 3785 diff changeset	364 }
0 a61af66fc99e Initial load duke parents: diff changeset	365
a61af66fc99e Initial load duke parents: diff changeset	366 return true;
a61af66fc99e Initial load duke parents: diff changeset	367 }
a61af66fc99e Initial load duke parents: diff changeset	368
a61af66fc99e Initial load duke parents: diff changeset	369 // ------------------------------------------------------------------
a61af66fc99e Initial load duke parents: diff changeset	370 // ciField::print
a61af66fc99e Initial load duke parents: diff changeset	371 void ciField::print() {
7421 ad5dd04754ee 8005031: Some cleanup in c2 to prepare for incremental inlining support roland parents: 6725 diff changeset	372 tty->print("<ciField name=");
0 a61af66fc99e Initial load duke parents: diff changeset	373 _holder->print_name();
a61af66fc99e Initial load duke parents: diff changeset	374 tty->print(".");
a61af66fc99e Initial load duke parents: diff changeset	375 _name->print_symbol();
7421 ad5dd04754ee 8005031: Some cleanup in c2 to prepare for incremental inlining support roland parents: 6725 diff changeset	376 tty->print(" signature=");
ad5dd04754ee 8005031: Some cleanup in c2 to prepare for incremental inlining support roland parents: 6725 diff changeset	377 _signature->print_symbol();
0 a61af66fc99e Initial load duke parents: diff changeset	378 tty->print(" offset=%d type=", _offset);
12190 edb5ab0f3fe5 8001107: @Stable annotation for constant folding of lazily evaluated variables vlivanov parents: 7421 diff changeset	379 if (_type != NULL)
edb5ab0f3fe5 8001107: @Stable annotation for constant folding of lazily evaluated variables vlivanov parents: 7421 diff changeset	380 _type->print_name();
edb5ab0f3fe5 8001107: @Stable annotation for constant folding of lazily evaluated variables vlivanov parents: 7421 diff changeset	381 else
edb5ab0f3fe5 8001107: @Stable annotation for constant folding of lazily evaluated variables vlivanov parents: 7421 diff changeset	382 tty->print("(reference)");
edb5ab0f3fe5 8001107: @Stable annotation for constant folding of lazily evaluated variables vlivanov parents: 7421 diff changeset	383 tty->print(" flags=%04x", flags().as_int());
0 a61af66fc99e Initial load duke parents: diff changeset	384 tty->print(" is_constant=%s", bool_to_str(_is_constant));
1682 e5dfb3ccb88b 6969569: assert(is_static() && is_constant()) failed: illegal call to constant_value() kvn parents: 1552 diff changeset	385 if (_is_constant && is_static()) {
0 a61af66fc99e Initial load duke parents: diff changeset	386 tty->print(" constant_value=");
a61af66fc99e Initial load duke parents: diff changeset	387 _constant_value.print();
a61af66fc99e Initial load duke parents: diff changeset	388 }
a61af66fc99e Initial load duke parents: diff changeset	389 tty->print(">");
a61af66fc99e Initial load duke parents: diff changeset	390 }
a61af66fc99e Initial load duke parents: diff changeset	391
a61af66fc99e Initial load duke parents: diff changeset	392 // ------------------------------------------------------------------
a61af66fc99e Initial load duke parents: diff changeset	393 // ciField::print_name_on
a61af66fc99e Initial load duke parents: diff changeset	394 //
a61af66fc99e Initial load duke parents: diff changeset	395 // Print the name of this field
a61af66fc99e Initial load duke parents: diff changeset	396 void ciField::print_name_on(outputStream* st) {
a61af66fc99e Initial load duke parents: diff changeset	397 name()->print_symbol_on(st);
a61af66fc99e Initial load duke parents: diff changeset	398 }

Mercurial > hg > truffle

annotate src/share/vm/ci/ciField.cpp @ 12264:b2e698d2276c