src/hotspot/share/classfile/javaClasses.inline.hpp
author lfoltan
Mon, 21 Oct 2019 13:13:16 -0400
changeset 58722 cba8afa5cfed
parent 58177 4932dce35882
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child 59056 15936b142f86
permissions -rw-r--r--
8231844: Enhance type signature characters in classfile_constants.h and improve the JVM to use type signature characters more consistently Summary: Increase the use of type signature constants instead of hard coded characters within the JVM. Reviewed-by: coleenp, dholmes, fparain Contributed-by: lois.foltan@oracle.com, john.r.rose@oracle.com
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/*
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 * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef SHARE_CLASSFILE_JAVACLASSES_INLINE_HPP
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#define SHARE_CLASSFILE_JAVACLASSES_INLINE_HPP
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#include "classfile/javaClasses.hpp"
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#include "oops/access.inline.hpp"
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#include "oops/oop.inline.hpp"
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#include "oops/oopsHierarchy.hpp"
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void java_lang_String::set_coder(oop string, jbyte coder) {
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  assert(initialized && (coder_offset > 0), "Must be initialized");
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  string->byte_field_put(coder_offset, coder);
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}
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void java_lang_String::set_value_raw(oop string, typeArrayOop buffer) {
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  assert(initialized, "Must be initialized");
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  string->obj_field_put_raw(value_offset, buffer);
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}
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void java_lang_String::set_value(oop string, typeArrayOop buffer) {
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  assert(initialized && (value_offset > 0), "Must be initialized");
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  string->obj_field_put(value_offset, (oop)buffer);
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}
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bool java_lang_String::hash_is_set(oop java_string) {
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  assert(initialized && (hash_offset > 0) && (hashIsZero_offset > 0), "Must be initialized");
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  return java_string->int_field(hash_offset) != 0 || java_string->bool_field(hashIsZero_offset) != 0;
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}
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// Accessors
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bool java_lang_String::value_equals(typeArrayOop str_value1, typeArrayOop str_value2) {
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  return ((str_value1 == str_value2) ||
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          (str_value1->length() == str_value2->length() &&
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           (!memcmp(str_value1->base(T_BYTE),
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                    str_value2->base(T_BYTE),
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                    str_value2->length() * sizeof(jbyte)))));
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}
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typeArrayOop java_lang_String::value(oop java_string) {
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  assert(initialized && (value_offset > 0), "Must be initialized");
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  assert(is_instance(java_string), "must be java_string");
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  return (typeArrayOop) java_string->obj_field(value_offset);
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}
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typeArrayOop java_lang_String::value_no_keepalive(oop java_string) {
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  assert(initialized && (value_offset > 0), "Must be initialized");
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  assert(is_instance(java_string), "must be java_string");
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  return (typeArrayOop) java_string->obj_field_access<AS_NO_KEEPALIVE>(value_offset);
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}
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bool java_lang_String::is_latin1(oop java_string) {
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  assert(initialized && (coder_offset > 0), "Must be initialized");
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  assert(is_instance(java_string), "must be java_string");
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  jbyte coder = java_string->byte_field(coder_offset);
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  assert(CompactStrings || coder == CODER_UTF16, "Must be UTF16 without CompactStrings");
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  return coder == CODER_LATIN1;
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}
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int java_lang_String::length(oop java_string, typeArrayOop value) {
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  assert(initialized, "Must be initialized");
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  assert(is_instance(java_string), "must be java_string");
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  assert(value_equals(value, java_lang_String::value(java_string)),
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         "value must be equal to java_lang_String::value(java_string)");
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  if (value == NULL) {
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    return 0;
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  }
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  int arr_length = value->length();
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  if (!is_latin1(java_string)) {
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    assert((arr_length & 1) == 0, "should be even for UTF16 string");
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    arr_length >>= 1; // convert number of bytes to number of elements
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  }
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  return arr_length;
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}
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int java_lang_String::length(oop java_string) {
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  assert(initialized, "Must be initialized");
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  assert(is_instance(java_string), "must be java_string");
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  typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
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  return length(java_string, value);
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}
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bool java_lang_String::is_instance_inlined(oop obj) {
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  return obj != NULL && obj->klass() == SystemDictionary::String_klass();
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}
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// Accessors
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oop java_lang_ref_Reference::referent(oop ref) {
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  return ref->obj_field(referent_offset);
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}
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void java_lang_ref_Reference::set_referent(oop ref, oop value) {
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  ref->obj_field_put(referent_offset, value);
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}
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void java_lang_ref_Reference::set_referent_raw(oop ref, oop value) {
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  ref->obj_field_put_raw(referent_offset, value);
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}
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HeapWord* java_lang_ref_Reference::referent_addr_raw(oop ref) {
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  return ref->obj_field_addr_raw<HeapWord>(referent_offset);
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}
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oop java_lang_ref_Reference::next(oop ref) {
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  return ref->obj_field(next_offset);
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}
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void java_lang_ref_Reference::set_next(oop ref, oop value) {
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  ref->obj_field_put(next_offset, value);
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}
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void java_lang_ref_Reference::set_next_raw(oop ref, oop value) {
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  ref->obj_field_put_raw(next_offset, value);
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}
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HeapWord* java_lang_ref_Reference::next_addr_raw(oop ref) {
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  return ref->obj_field_addr_raw<HeapWord>(next_offset);
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}
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oop java_lang_ref_Reference::discovered(oop ref) {
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  return ref->obj_field(discovered_offset);
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}
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void java_lang_ref_Reference::set_discovered(oop ref, oop value) {
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  ref->obj_field_put(discovered_offset, value);
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}
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void java_lang_ref_Reference::set_discovered_raw(oop ref, oop value) {
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  ref->obj_field_put_raw(discovered_offset, value);
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}
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HeapWord* java_lang_ref_Reference::discovered_addr_raw(oop ref) {
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  return ref->obj_field_addr_raw<HeapWord>(discovered_offset);
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}
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bool java_lang_ref_Reference::is_final(oop ref) {
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  return InstanceKlass::cast(ref->klass())->reference_type() == REF_FINAL;
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}
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bool java_lang_ref_Reference::is_phantom(oop ref) {
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  return InstanceKlass::cast(ref->klass())->reference_type() == REF_PHANTOM;
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}
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inline void java_lang_invoke_CallSite::set_target_volatile(oop site, oop target) {
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  site->obj_field_put_volatile(_target_offset, target);
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}
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inline oop  java_lang_invoke_CallSite::target(oop site) {
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  return site->obj_field(_target_offset);
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}
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inline void java_lang_invoke_CallSite::set_target(oop site, oop target) {
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  site->obj_field_put(_target_offset, target);
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}
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inline bool java_lang_invoke_CallSite::is_instance(oop obj) {
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  return obj != NULL && is_subclass(obj->klass());
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}
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inline bool java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(oop obj) {
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  return obj != NULL && is_subclass(obj->klass());
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}
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inline bool java_lang_invoke_MemberName::is_instance(oop obj) {
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  return obj != NULL && obj->klass() == SystemDictionary::MemberName_klass();
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}
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inline bool java_lang_invoke_ResolvedMethodName::is_instance(oop obj) {
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  return obj != NULL && obj->klass() == SystemDictionary::ResolvedMethodName_klass();
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}
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inline bool java_lang_invoke_MethodType::is_instance(oop obj) {
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  return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
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}
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inline bool java_lang_invoke_MethodHandle::is_instance(oop obj) {
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  return obj != NULL && is_subclass(obj->klass());
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}
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inline bool java_lang_Class::is_instance(oop obj) {
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  return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
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}
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inline bool java_lang_Class::is_primitive(oop java_class) {
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  // should assert:
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  //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
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  bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
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#ifdef ASSERT
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  if (is_primitive) {
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    Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
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    assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
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        "Should be either the T_VOID primitive or a java primitive");
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  }
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#endif
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  return is_primitive;
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}
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inline int java_lang_Class::oop_size_raw(oop java_class) {
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  assert(_oop_size_offset != 0, "must be set");
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  int size = java_class->int_field_raw(_oop_size_offset);
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  assert(size > 0, "Oop size must be greater than zero, not %d", size);
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  return size;
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}
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inline bool java_lang_invoke_DirectMethodHandle::is_instance(oop obj) {
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  return obj != NULL && is_subclass(obj->klass());
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}
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inline bool java_lang_Module::is_instance(oop obj) {
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  return obj != NULL && obj->klass() == SystemDictionary::Module_klass();
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}
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inline int Backtrace::merge_bci_and_version(int bci, int version) {
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  // only store u2 for version, checking for overflow.
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  if (version > USHRT_MAX || version < 0) version = USHRT_MAX;
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  assert((jushort)bci == bci, "bci should be short");
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  return build_int_from_shorts(version, bci);
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}
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inline int Backtrace::merge_mid_and_cpref(int mid, int cpref) {
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  // only store u2 for mid and cpref, checking for overflow.
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  assert((jushort)mid == mid, "mid should be short");
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  assert((jushort)cpref == cpref, "cpref should be short");
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  return build_int_from_shorts(cpref, mid);
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}
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inline int Backtrace::bci_at(unsigned int merged) {
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  return extract_high_short_from_int(merged);
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}
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inline int Backtrace::version_at(unsigned int merged) {
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  return extract_low_short_from_int(merged);
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}
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inline int Backtrace::mid_at(unsigned int merged) {
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  return extract_high_short_from_int(merged);
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}
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inline int Backtrace::cpref_at(unsigned int merged) {
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  return extract_low_short_from_int(merged);
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}
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inline int Backtrace::get_line_number(const methodHandle& method, int bci) {
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  int line_number = 0;
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  if (method->is_native()) {
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    // Negative value different from -1 below, enabling Java code in
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    // class java.lang.StackTraceElement to distinguish "native" from
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    // "no LineNumberTable".  JDK tests for -2.
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    line_number = -2;
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  } else {
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    // Returns -1 if no LineNumberTable, and otherwise actual line number
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    line_number = method->line_number_from_bci(bci);
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  }
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  return line_number;
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}
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inline Symbol* Backtrace::get_source_file_name(InstanceKlass* holder, int version) {
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  // RedefineClasses() currently permits redefine operations to
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  // happen in parallel using a "last one wins" philosophy. That
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  // spec laxness allows the constant pool entry associated with
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  // the source_file_name_index for any older constant pool version
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  // to be unstable so we shouldn't try to use it.
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  if (holder->constants()->version() != version) {
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    return NULL;
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  } else {
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    return holder->source_file_name();
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  }
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}
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#endif // SHARE_CLASSFILE_JAVACLASSES_INLINE_HPP