1 /* 2 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_CLASSFILE_JAVACLASSES_INLINE_HPP 26 #define SHARE_VM_CLASSFILE_JAVACLASSES_INLINE_HPP 27 28 #include "classfile/javaClasses.hpp" 29 #include "oops/access.inline.hpp" 30 #include "oops/oop.inline.hpp" 31 #include "oops/oopsHierarchy.hpp" 32 33 void java_lang_String::set_coder(oop string, jbyte coder) { 34 assert(initialized && (coder_offset > 0), "Must be initialized"); 35 string->byte_field_put(coder_offset, coder); 36 } 37 38 void java_lang_String::set_value_raw(oop string, typeArrayOop buffer) { 39 assert(initialized, "Must be initialized"); 40 string->obj_field_put_raw(value_offset, buffer); 41 } 42 void java_lang_String::set_value(oop string, typeArrayOop buffer) { 43 assert(initialized && (value_offset > 0), "Must be initialized"); 44 string->obj_field_put(value_offset, (oop)buffer); 45 } 46 void java_lang_String::set_hash(oop string, unsigned int hash) { 47 assert(initialized && (hash_offset > 0), "Must be initialized"); 48 string->int_field_put(hash_offset, hash); 49 } 50 51 // Accessors 52 typeArrayOop java_lang_String::value(oop java_string) { 53 assert(initialized && (value_offset > 0), "Must be initialized"); 54 assert(is_instance(java_string), "must be java_string"); 55 return (typeArrayOop) java_string->obj_field(value_offset); 56 } 57 typeArrayOop java_lang_String::value_no_keepalive(oop java_string) { 58 assert(initialized && (value_offset > 0), "Must be initialized"); 59 assert(is_instance(java_string), "must be java_string"); 60 return (typeArrayOop) java_string->obj_field_access<AS_NO_KEEPALIVE>(value_offset); 61 } 62 unsigned int java_lang_String::hash(oop java_string) { 63 assert(initialized && (hash_offset > 0), "Must be initialized"); 64 assert(is_instance(java_string), "must be java_string"); 65 return java_string->int_field(hash_offset); 66 } 67 bool java_lang_String::is_latin1(oop java_string) { 68 assert(initialized && (coder_offset > 0), "Must be initialized"); 69 assert(is_instance(java_string), "must be java_string"); 70 jbyte coder = java_string->byte_field(coder_offset); 71 assert(CompactStrings || coder == CODER_UTF16, "Must be UTF16 without CompactStrings"); 72 return coder == CODER_LATIN1; 73 } 74 int java_lang_String::length(oop java_string) { 75 assert(initialized, "Must be initialized"); 76 assert(is_instance(java_string), "must be java_string"); 77 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 78 if (value == NULL) { 79 return 0; 80 } 81 int arr_length = value->length(); 82 if (!is_latin1(java_string)) { 83 assert((arr_length & 1) == 0, "should be even for UTF16 string"); 84 arr_length >>= 1; // convert number of bytes to number of elements 85 } 86 return arr_length; 87 } 88 89 bool java_lang_String::is_instance_inlined(oop obj) { 90 return obj != NULL && obj->klass() == SystemDictionary::String_klass(); 91 } 92 93 // Accessors 94 oop java_lang_ref_Reference::referent(oop ref) { 95 return ref->obj_field(referent_offset); 96 } 97 void java_lang_ref_Reference::set_referent(oop ref, oop value) { 98 ref->obj_field_put(referent_offset, value); 99 } 100 void java_lang_ref_Reference::set_referent_raw(oop ref, oop value) { 101 ref->obj_field_put_raw(referent_offset, value); 102 } 103 HeapWord* java_lang_ref_Reference::referent_addr_raw(oop ref) { 104 return ref->obj_field_addr_raw<HeapWord>(referent_offset); 105 } 106 oop java_lang_ref_Reference::next(oop ref) { 107 return ref->obj_field(next_offset); 108 } 109 void java_lang_ref_Reference::set_next(oop ref, oop value) { 110 ref->obj_field_put(next_offset, value); 111 } 112 void java_lang_ref_Reference::set_next_raw(oop ref, oop value) { 113 ref->obj_field_put_raw(next_offset, value); 114 } 115 HeapWord* java_lang_ref_Reference::next_addr_raw(oop ref) { 116 return ref->obj_field_addr_raw<HeapWord>(next_offset); 117 } 118 oop java_lang_ref_Reference::discovered(oop ref) { 119 return ref->obj_field(discovered_offset); 120 } 121 void java_lang_ref_Reference::set_discovered(oop ref, oop value) { 122 ref->obj_field_put(discovered_offset, value); 123 } 124 void java_lang_ref_Reference::set_discovered_raw(oop ref, oop value) { 125 ref->obj_field_put_raw(discovered_offset, value); 126 } 127 HeapWord* java_lang_ref_Reference::discovered_addr_raw(oop ref) { 128 return ref->obj_field_addr_raw<HeapWord>(discovered_offset); 129 } 130 bool java_lang_ref_Reference::is_phantom(oop ref) { 131 return InstanceKlass::cast(ref->klass())->reference_type() == REF_PHANTOM; 132 } 133 134 inline void java_lang_invoke_CallSite::set_target_volatile(oop site, oop target) { 135 site->obj_field_put_volatile(_target_offset, target); 136 } 137 138 inline oop java_lang_invoke_CallSite::target(oop site) { 139 return site->obj_field(_target_offset); 140 } 141 142 inline void java_lang_invoke_CallSite::set_target(oop site, oop target) { 143 site->obj_field_put(_target_offset, target); 144 } 145 146 inline bool java_lang_invoke_CallSite::is_instance(oop obj) { 147 return obj != NULL && is_subclass(obj->klass()); 148 } 149 150 inline bool java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(oop obj) { 151 return obj != NULL && is_subclass(obj->klass()); 152 } 153 154 inline bool java_lang_invoke_MemberName::is_instance(oop obj) { 155 return obj != NULL && obj->klass() == SystemDictionary::MemberName_klass(); 156 } 157 158 inline bool java_lang_invoke_ResolvedMethodName::is_instance(oop obj) { 159 return obj != NULL && obj->klass() == SystemDictionary::ResolvedMethodName_klass(); 160 } 161 162 inline bool java_lang_invoke_MethodType::is_instance(oop obj) { 163 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass(); 164 } 165 166 inline bool java_lang_invoke_MethodHandle::is_instance(oop obj) { 167 return obj != NULL && is_subclass(obj->klass()); 168 } 169 170 inline bool java_lang_Class::is_instance(oop obj) { 171 return obj != NULL && obj->klass() == SystemDictionary::Class_klass(); 172 } 173 174 inline bool java_lang_invoke_DirectMethodHandle::is_instance(oop obj) { 175 return obj != NULL && is_subclass(obj->klass()); 176 } 177 178 inline bool java_lang_Module::is_instance(oop obj) { 179 return obj != NULL && obj->klass() == SystemDictionary::Module_klass(); 180 } 181 182 inline int Backtrace::merge_bci_and_version(int bci, int version) { 183 // only store u2 for version, checking for overflow. 184 if (version > USHRT_MAX || version < 0) version = USHRT_MAX; 185 assert((jushort)bci == bci, "bci should be short"); 186 return build_int_from_shorts(version, bci); 187 } 188 189 inline int Backtrace::merge_mid_and_cpref(int mid, int cpref) { 190 // only store u2 for mid and cpref, checking for overflow. 191 assert((jushort)mid == mid, "mid should be short"); 192 assert((jushort)cpref == cpref, "cpref should be short"); 193 return build_int_from_shorts(cpref, mid); 194 } 195 196 inline int Backtrace::bci_at(unsigned int merged) { 197 return extract_high_short_from_int(merged); 198 } 199 200 inline int Backtrace::version_at(unsigned int merged) { 201 return extract_low_short_from_int(merged); 202 } 203 204 inline int Backtrace::mid_at(unsigned int merged) { 205 return extract_high_short_from_int(merged); 206 } 207 208 inline int Backtrace::cpref_at(unsigned int merged) { 209 return extract_low_short_from_int(merged); 210 } 211 212 inline int Backtrace::get_line_number(const methodHandle& method, int bci) { 213 int line_number = 0; 214 if (method->is_native()) { 215 // Negative value different from -1 below, enabling Java code in 216 // class java.lang.StackTraceElement to distinguish "native" from 217 // "no LineNumberTable". JDK tests for -2. 218 line_number = -2; 219 } else { 220 // Returns -1 if no LineNumberTable, and otherwise actual line number 221 line_number = method->line_number_from_bci(bci); 222 if (line_number == -1 && ShowHiddenFrames) { 223 line_number = bci + 1000000; 224 } 225 } 226 return line_number; 227 } 228 229 inline Symbol* Backtrace::get_source_file_name(InstanceKlass* holder, int version) { 230 // RedefineClasses() currently permits redefine operations to 231 // happen in parallel using a "last one wins" philosophy. That 232 // spec laxness allows the constant pool entry associated with 233 // the source_file_name_index for any older constant pool version 234 // to be unstable so we shouldn't try to use it. 235 if (holder->constants()->version() != version) { 236 return NULL; 237 } else { 238 return holder->source_file_name(); 239 } 240 } 241 242 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_INLINE_HPP