src/hotspot/share/classfile/javaClasses.inline.hpp - toolchain/jdk/jdk21 - Git at Google

 /*
  * Copyright (c) 2015, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */

 #ifndef SHARE_CLASSFILE_JAVACLASSES_INLINE_HPP
 #define SHARE_CLASSFILE_JAVACLASSES_INLINE_HPP

 #include "classfile/javaClasses.hpp"

 #include "memory/referenceType.hpp"
 #include "oops/access.inline.hpp"
 #include "oops/instanceKlass.inline.hpp"
 #include "oops/method.hpp"
 #include "oops/oop.inline.hpp"
 #include "oops/oopsHierarchy.hpp"
 #include "oops/typeArrayOop.inline.hpp"

 void java_lang_String::set_coder(oop string, jbyte coder) {
   string->byte_field_put(_coder_offset, coder);
 }

 void java_lang_String::set_value_raw(oop string, typeArrayOop buffer) {
   string->obj_field_put_raw(_value_offset, buffer);
 }

 void java_lang_String::set_value(oop string, typeArrayOop buffer) {
   string->obj_field_put(_value_offset, buffer);
 }

 bool java_lang_String::hash_is_set(oop java_string) {
   return java_string->int_field(_hash_offset) != 0 || java_string->bool_field(_hashIsZero_offset) != 0;
 }

 // Accessors
 bool java_lang_String::value_equals(typeArrayOop str_value1, typeArrayOop str_value2) {
   return ((str_value1 == str_value2) ||
           (str_value1->length() == str_value2->length() &&
            (!memcmp(str_value1->base(T_BYTE),
                     str_value2->base(T_BYTE),
                     str_value2->length() * sizeof(jbyte)))));
 }

 typeArrayOop java_lang_String::value(oop java_string) {
   assert(is_instance(java_string), "must be java_string");
   return (typeArrayOop) java_string->obj_field(_value_offset);
 }

 typeArrayOop java_lang_String::value_no_keepalive(oop java_string) {
   assert(is_instance(java_string), "must be java_string");
   return (typeArrayOop) java_string->obj_field_access<AS_NO_KEEPALIVE>(_value_offset);
 }

 bool java_lang_String::is_latin1(oop java_string) {
   assert(is_instance(java_string), "must be java_string");
   jbyte coder = java_string->byte_field(_coder_offset);
   assert(CompactStrings || coder == CODER_UTF16, "Must be UTF16 without CompactStrings");
   return coder == CODER_LATIN1;
 }

 uint8_t* java_lang_String::flags_addr(oop java_string) {
   assert(_initialized, "Must be initialized");
   assert(is_instance(java_string), "Must be java string");
   return java_string->field_addr<uint8_t>(_flags_offset);
 }

 bool java_lang_String::is_flag_set(oop java_string, uint8_t flag_mask) {
   return (Atomic::load(flags_addr(java_string)) & flag_mask) != 0;
 }

 bool java_lang_String::deduplication_forbidden(oop java_string) {
   return is_flag_set(java_string, _deduplication_forbidden_mask);
 }

 bool java_lang_String::deduplication_requested(oop java_string) {
   return is_flag_set(java_string, _deduplication_requested_mask);
 }

 void java_lang_String::set_deduplication_forbidden(oop java_string) {
   test_and_set_flag(java_string, _deduplication_forbidden_mask);
 }

 bool java_lang_String::test_and_set_deduplication_requested(oop java_string) {
   return test_and_set_flag(java_string, _deduplication_requested_mask);
 }

 int java_lang_String::length(oop java_string, typeArrayOop value) {
   assert(_initialized, "Must be initialized");
   assert(is_instance(java_string), "must be java_string");
   assert(value_equals(value, java_lang_String::value(java_string)),
          "value must be equal to java_lang_String::value(java_string)");
   if (value == nullptr) {
     return 0;
   }
   int arr_length = value->length();
   if (!is_latin1(java_string)) {
     assert((arr_length & 1) == 0, "should be even for UTF16 string");
     arr_length >>= 1; // convert number of bytes to number of elements
   }
   return arr_length;
 }

 int java_lang_String::length(oop java_string) {
   assert(_initialized, "Must be initialized");
   assert(is_instance(java_string), "must be java_string");
   typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
   return length(java_string, value);
 }

 bool java_lang_String::is_instance(oop obj) {
   return obj != nullptr && obj->klass() == vmClasses::String_klass();
 }

 // Accessors

 oop java_lang_ref_Reference::weak_referent_no_keepalive(oop ref) {
   assert(java_lang_ref_Reference::is_weak(ref) || java_lang_ref_Reference::is_soft(ref), "must be Weak or Soft Reference");
   return ref->obj_field_access<ON_WEAK_OOP_REF | AS_NO_KEEPALIVE>(_referent_offset);
 }

 oop java_lang_ref_Reference::weak_referent(oop ref) {
   assert(java_lang_ref_Reference::is_weak(ref) || java_lang_ref_Reference::is_soft(ref), "must be Weak or Soft Reference");
   return ref->obj_field_access<ON_WEAK_OOP_REF>(_referent_offset);
 }

 oop java_lang_ref_Reference::phantom_referent_no_keepalive(oop ref) {
   assert(java_lang_ref_Reference::is_phantom(ref), "must be Phantom Reference");
   return ref->obj_field_access<ON_PHANTOM_OOP_REF | AS_NO_KEEPALIVE>(_referent_offset);
 }

 oop java_lang_ref_Reference::unknown_referent_no_keepalive(oop ref) {
   return ref->obj_field_access<ON_UNKNOWN_OOP_REF | AS_NO_KEEPALIVE>(_referent_offset);
 }

 void java_lang_ref_Reference::clear_referent(oop ref) {
   HeapAccess<ON_UNKNOWN_OOP_REF | AS_NO_KEEPALIVE>::oop_store_at(ref, _referent_offset, nullptr);
 }

 void java_lang_ref_Reference::clear_referent_raw(oop ref) {
   ref->obj_field_put_raw(_referent_offset, nullptr);
 }

 HeapWord* java_lang_ref_Reference::referent_addr_raw(oop ref) {
   return ref->field_addr<HeapWord>(_referent_offset);
 }

 oop java_lang_ref_Reference::next(oop ref) {
   return ref->obj_field(_next_offset);
 }

 void java_lang_ref_Reference::set_next(oop ref, oop value) {
   ref->obj_field_put(_next_offset, value);
 }

 void java_lang_ref_Reference::set_next_raw(oop ref, oop value) {
   ref->obj_field_put_raw(_next_offset, value);
 }

 HeapWord* java_lang_ref_Reference::next_addr_raw(oop ref) {
   return ref->field_addr<HeapWord>(_next_offset);
 }

 oop java_lang_ref_Reference::discovered(oop ref) {
   return ref->obj_field(_discovered_offset);
 }

 void java_lang_ref_Reference::set_discovered(oop ref, oop value) {
   ref->obj_field_put(_discovered_offset, value);
 }

 void java_lang_ref_Reference::set_discovered_raw(oop ref, oop value) {
   ref->obj_field_put_raw(_discovered_offset, value);
 }

 HeapWord* java_lang_ref_Reference::discovered_addr_raw(oop ref) {
   return ref->field_addr<HeapWord>(_discovered_offset);
 }

 bool java_lang_ref_Reference::is_final(oop ref) {
   return InstanceKlass::cast(ref->klass())->reference_type() == REF_FINAL;
 }

 bool java_lang_ref_Reference::is_phantom(oop ref) {
   return InstanceKlass::cast(ref->klass())->reference_type() == REF_PHANTOM;
 }

 bool java_lang_ref_Reference::is_weak(oop ref) {
   return InstanceKlass::cast(ref->klass())->reference_type() == REF_WEAK;
 }

 bool java_lang_ref_Reference::is_soft(oop ref) {
   return InstanceKlass::cast(ref->klass())->reference_type() == REF_SOFT;
 }

 inline oop java_lang_Thread::continuation(oop java_thread) {
   return java_thread->obj_field(_continuation_offset);
 }

 inline int64_t java_lang_Thread::thread_id(oop java_thread) {
   return java_thread->long_field(_tid_offset);
 }

 inline oop java_lang_VirtualThread::vthread_scope() {
   oop base = vmClasses::VirtualThread_klass()->static_field_base_raw();
   return base->obj_field(static_vthread_scope_offset);
 }

 #if INCLUDE_JFR
 inline u2 java_lang_Thread::jfr_epoch(oop ref) {
   return ref->short_field(_jfr_epoch_offset);
 }

 inline void java_lang_Thread::set_jfr_epoch(oop ref, u2 epoch) {
   ref->short_field_put(_jfr_epoch_offset, epoch);
 }
 #endif // INCLUDE_JFR


 inline void java_lang_invoke_CallSite::set_target_volatile(oop site, oop target) {
   site->obj_field_put_volatile(_target_offset, target);
 }

 inline oop  java_lang_invoke_CallSite::target(oop site) {
   return site->obj_field(_target_offset);
 }

 inline void java_lang_invoke_CallSite::set_target(oop site, oop target) {
   site->obj_field_put(_target_offset, target);
 }

 inline bool java_lang_invoke_CallSite::is_instance(oop obj) {
   return obj != nullptr && is_subclass(obj->klass());
 }

 inline jboolean java_lang_invoke_ConstantCallSite::is_frozen(oop site) {
   return site->bool_field(_is_frozen_offset);
 }

 inline bool java_lang_invoke_ConstantCallSite::is_instance(oop obj) {
   return obj != nullptr && is_subclass(obj->klass());
 }

 inline bool java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(oop obj) {
   return obj != nullptr && is_subclass(obj->klass());
 }

 inline bool java_lang_invoke_MemberName::is_instance(oop obj) {
   return obj != nullptr && obj->klass() == vmClasses::MemberName_klass();
 }

 inline bool java_lang_invoke_ResolvedMethodName::is_instance(oop obj) {
   return obj != nullptr && obj->klass() == vmClasses::ResolvedMethodName_klass();
 }

 inline bool java_lang_invoke_MethodType::is_instance(oop obj) {
   return obj != nullptr && obj->klass() == vmClasses::MethodType_klass();
 }

 inline bool java_lang_invoke_MethodHandle::is_instance(oop obj) {
   return obj != nullptr && is_subclass(obj->klass());
 }

 inline bool java_lang_Class::is_instance(oop obj) {
   return obj != nullptr && obj->klass() == vmClasses::Class_klass();
 }

 inline Klass* java_lang_Class::as_Klass(oop java_class) {
   //%note memory_2
   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
   Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
   assert(k == nullptr || k->is_klass(), "type check");
   return k;
 }

 inline bool java_lang_Class::is_primitive(oop java_class) {
   // should assert:
   //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
   bool is_primitive = (java_class->metadata_field(_klass_offset) == nullptr);

 #ifdef ASSERT
   if (is_primitive) {
     Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
     assert(k == nullptr || is_java_primitive(ArrayKlass::cast(k)->element_type()),
         "Should be either the T_VOID primitive or a java primitive");
   }
 #endif

   return is_primitive;
 }

 inline size_t java_lang_Class::oop_size(oop java_class) {
   assert(_oop_size_offset != 0, "must be set");
   int size = java_class->int_field(_oop_size_offset);
   assert(size > 0, "Oop size must be greater than zero, not %d", size);
   return size;
 }

 inline bool java_lang_invoke_DirectMethodHandle::is_instance(oop obj) {
   return obj != nullptr && is_subclass(obj->klass());
 }

 inline bool java_lang_Module::is_instance(oop obj) {
   return obj != nullptr && obj->klass() == vmClasses::Module_klass();
 }

 inline int Backtrace::merge_bci_and_version(int bci, int version) {
   // only store u2 for version, checking for overflow.
   if (version > USHRT_MAX || version < 0) version = USHRT_MAX;
   assert((jushort)bci == bci, "bci should be short");
   return build_int_from_shorts(version, bci);
 }

 inline int Backtrace::merge_mid_and_cpref(int mid, int cpref) {
   // only store u2 for mid and cpref, checking for overflow.
   assert((jushort)mid == mid, "mid should be short");
   assert((jushort)cpref == cpref, "cpref should be short");
   return build_int_from_shorts(cpref, mid);
 }

 inline int Backtrace::bci_at(unsigned int merged) {
   return extract_high_short_from_int(merged);
 }

 inline int Backtrace::version_at(unsigned int merged) {
   return extract_low_short_from_int(merged);
 }

 inline int Backtrace::mid_at(unsigned int merged) {
   return extract_high_short_from_int(merged);
 }

 inline int Backtrace::cpref_at(unsigned int merged) {
   return extract_low_short_from_int(merged);
 }

 inline int Backtrace::get_line_number(Method* method, int bci) {
   int line_number = 0;
   if (method->is_native()) {
     // Negative value different from -1 below, enabling Java code in
     // class java.lang.StackTraceElement to distinguish "native" from
     // "no LineNumberTable".  JDK tests for -2.
     line_number = -2;
   } else {
     // Returns -1 if no LineNumberTable, and otherwise actual line number
     line_number = method->line_number_from_bci(bci);
   }
   return line_number;
 }

 inline Symbol* Backtrace::get_source_file_name(InstanceKlass* holder, int version) {
   // RedefineClasses() currently permits redefine operations to
   // happen in parallel using a "last one wins" philosophy. That
   // spec laxness allows the constant pool entry associated with
   // the source_file_name_index for any older constant pool version
   // to be unstable so we shouldn't try to use it.
   if (holder->constants()->version() != version) {
     return nullptr;
   } else {
     return holder->source_file_name();
   }
 }

 #endif // SHARE_CLASSFILE_JAVACLASSES_INLINE_HPP
	/*
	* Copyright (c) 2015, 2023, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*
	*/

	#ifndef SHARE_CLASSFILE_JAVACLASSES_INLINE_HPP
	#define SHARE_CLASSFILE_JAVACLASSES_INLINE_HPP

	#include "classfile/javaClasses.hpp"

	#include "memory/referenceType.hpp"
	#include "oops/access.inline.hpp"
	#include "oops/instanceKlass.inline.hpp"
	#include "oops/method.hpp"
	#include "oops/oop.inline.hpp"
	#include "oops/oopsHierarchy.hpp"
	#include "oops/typeArrayOop.inline.hpp"

	void java_lang_String::set_coder(oop string, jbyte coder) {
	string->byte_field_put(_coder_offset, coder);
	}

	void java_lang_String::set_value_raw(oop string, typeArrayOop buffer) {
	string->obj_field_put_raw(_value_offset, buffer);
	}

	void java_lang_String::set_value(oop string, typeArrayOop buffer) {
	string->obj_field_put(_value_offset, buffer);
	}

	bool java_lang_String::hash_is_set(oop java_string) {
	return java_string->int_field(_hash_offset) != 0 \|\| java_string->bool_field(_hashIsZero_offset) != 0;
	}

	// Accessors
	bool java_lang_String::value_equals(typeArrayOop str_value1, typeArrayOop str_value2) {
	return ((str_value1 == str_value2) \|\|
	(str_value1->length() == str_value2->length() &&
	(!memcmp(str_value1->base(T_BYTE),
	str_value2->base(T_BYTE),
	str_value2->length() * sizeof(jbyte)))));
	}

	typeArrayOop java_lang_String::value(oop java_string) {
	assert(is_instance(java_string), "must be java_string");
	return (typeArrayOop) java_string->obj_field(_value_offset);
	}

	typeArrayOop java_lang_String::value_no_keepalive(oop java_string) {
	assert(is_instance(java_string), "must be java_string");
	return (typeArrayOop) java_string->obj_field_access<AS_NO_KEEPALIVE>(_value_offset);
	}

	bool java_lang_String::is_latin1(oop java_string) {
	assert(is_instance(java_string), "must be java_string");
	jbyte coder = java_string->byte_field(_coder_offset);
	assert(CompactStrings \|\| coder == CODER_UTF16, "Must be UTF16 without CompactStrings");
	return coder == CODER_LATIN1;
	}

	uint8_t* java_lang_String::flags_addr(oop java_string) {
	assert(_initialized, "Must be initialized");
	assert(is_instance(java_string), "Must be java string");
	return java_string->field_addr<uint8_t>(_flags_offset);
	}

	bool java_lang_String::is_flag_set(oop java_string, uint8_t flag_mask) {
	return (Atomic::load(flags_addr(java_string)) & flag_mask) != 0;
	}

	bool java_lang_String::deduplication_forbidden(oop java_string) {
	return is_flag_set(java_string, _deduplication_forbidden_mask);
	}

	bool java_lang_String::deduplication_requested(oop java_string) {
	return is_flag_set(java_string, _deduplication_requested_mask);
	}

	void java_lang_String::set_deduplication_forbidden(oop java_string) {
	test_and_set_flag(java_string, _deduplication_forbidden_mask);
	}

	bool java_lang_String::test_and_set_deduplication_requested(oop java_string) {
	return test_and_set_flag(java_string, _deduplication_requested_mask);
	}

	int java_lang_String::length(oop java_string, typeArrayOop value) {
	assert(_initialized, "Must be initialized");
	assert(is_instance(java_string), "must be java_string");
	assert(value_equals(value, java_lang_String::value(java_string)),
	"value must be equal to java_lang_String::value(java_string)");
	if (value == nullptr) {
	return 0;
	}
	int arr_length = value->length();
	if (!is_latin1(java_string)) {
	assert((arr_length & 1) == 0, "should be even for UTF16 string");
	arr_length >>= 1; // convert number of bytes to number of elements
	}
	return arr_length;
	}

	int java_lang_String::length(oop java_string) {
	assert(_initialized, "Must be initialized");
	assert(is_instance(java_string), "must be java_string");
	typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
	return length(java_string, value);
	}

	bool java_lang_String::is_instance(oop obj) {
	return obj != nullptr && obj->klass() == vmClasses::String_klass();
	}

	// Accessors

	oop java_lang_ref_Reference::weak_referent_no_keepalive(oop ref) {
	assert(java_lang_ref_Reference::is_weak(ref) \|\| java_lang_ref_Reference::is_soft(ref), "must be Weak or Soft Reference");
	return ref->obj_field_access<ON_WEAK_OOP_REF \| AS_NO_KEEPALIVE>(_referent_offset);
	}

	oop java_lang_ref_Reference::weak_referent(oop ref) {
	assert(java_lang_ref_Reference::is_weak(ref) \|\| java_lang_ref_Reference::is_soft(ref), "must be Weak or Soft Reference");
	return ref->obj_field_access<ON_WEAK_OOP_REF>(_referent_offset);
	}

	oop java_lang_ref_Reference::phantom_referent_no_keepalive(oop ref) {
	assert(java_lang_ref_Reference::is_phantom(ref), "must be Phantom Reference");
	return ref->obj_field_access<ON_PHANTOM_OOP_REF \| AS_NO_KEEPALIVE>(_referent_offset);
	}

	oop java_lang_ref_Reference::unknown_referent_no_keepalive(oop ref) {
	return ref->obj_field_access<ON_UNKNOWN_OOP_REF \| AS_NO_KEEPALIVE>(_referent_offset);
	}

	void java_lang_ref_Reference::clear_referent(oop ref) {
	HeapAccess<ON_UNKNOWN_OOP_REF \| AS_NO_KEEPALIVE>::oop_store_at(ref, _referent_offset, nullptr);
	}

	void java_lang_ref_Reference::clear_referent_raw(oop ref) {
	ref->obj_field_put_raw(_referent_offset, nullptr);
	}

	HeapWord* java_lang_ref_Reference::referent_addr_raw(oop ref) {
	return ref->field_addr<HeapWord>(_referent_offset);
	}

	oop java_lang_ref_Reference::next(oop ref) {
	return ref->obj_field(_next_offset);
	}

	void java_lang_ref_Reference::set_next(oop ref, oop value) {
	ref->obj_field_put(_next_offset, value);
	}

	void java_lang_ref_Reference::set_next_raw(oop ref, oop value) {
	ref->obj_field_put_raw(_next_offset, value);
	}

	HeapWord* java_lang_ref_Reference::next_addr_raw(oop ref) {
	return ref->field_addr<HeapWord>(_next_offset);
	}

	oop java_lang_ref_Reference::discovered(oop ref) {
	return ref->obj_field(_discovered_offset);
	}

	void java_lang_ref_Reference::set_discovered(oop ref, oop value) {
	ref->obj_field_put(_discovered_offset, value);
	}

	void java_lang_ref_Reference::set_discovered_raw(oop ref, oop value) {
	ref->obj_field_put_raw(_discovered_offset, value);
	}

	HeapWord* java_lang_ref_Reference::discovered_addr_raw(oop ref) {
	return ref->field_addr<HeapWord>(_discovered_offset);
	}

	bool java_lang_ref_Reference::is_final(oop ref) {
	return InstanceKlass::cast(ref->klass())->reference_type() == REF_FINAL;
	}

	bool java_lang_ref_Reference::is_phantom(oop ref) {
	return InstanceKlass::cast(ref->klass())->reference_type() == REF_PHANTOM;
	}

	bool java_lang_ref_Reference::is_weak(oop ref) {
	return InstanceKlass::cast(ref->klass())->reference_type() == REF_WEAK;
	}

	bool java_lang_ref_Reference::is_soft(oop ref) {
	return InstanceKlass::cast(ref->klass())->reference_type() == REF_SOFT;
	}

	inline oop java_lang_Thread::continuation(oop java_thread) {
	return java_thread->obj_field(_continuation_offset);
	}

	inline int64_t java_lang_Thread::thread_id(oop java_thread) {
	return java_thread->long_field(_tid_offset);
	}

	inline oop java_lang_VirtualThread::vthread_scope() {
	oop base = vmClasses::VirtualThread_klass()->static_field_base_raw();
	return base->obj_field(static_vthread_scope_offset);
	}

	#if INCLUDE_JFR
	inline u2 java_lang_Thread::jfr_epoch(oop ref) {
	return ref->short_field(_jfr_epoch_offset);
	}

	inline void java_lang_Thread::set_jfr_epoch(oop ref, u2 epoch) {
	ref->short_field_put(_jfr_epoch_offset, epoch);
	}
	#endif // INCLUDE_JFR


	inline void java_lang_invoke_CallSite::set_target_volatile(oop site, oop target) {
	site->obj_field_put_volatile(_target_offset, target);
	}

	inline oop java_lang_invoke_CallSite::target(oop site) {
	return site->obj_field(_target_offset);
	}

	inline void java_lang_invoke_CallSite::set_target(oop site, oop target) {
	site->obj_field_put(_target_offset, target);
	}

	inline bool java_lang_invoke_CallSite::is_instance(oop obj) {
	return obj != nullptr && is_subclass(obj->klass());
	}

	inline jboolean java_lang_invoke_ConstantCallSite::is_frozen(oop site) {
	return site->bool_field(_is_frozen_offset);
	}

	inline bool java_lang_invoke_ConstantCallSite::is_instance(oop obj) {
	return obj != nullptr && is_subclass(obj->klass());
	}

	inline bool java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(oop obj) {
	return obj != nullptr && is_subclass(obj->klass());
	}

	inline bool java_lang_invoke_MemberName::is_instance(oop obj) {
	return obj != nullptr && obj->klass() == vmClasses::MemberName_klass();
	}

	inline bool java_lang_invoke_ResolvedMethodName::is_instance(oop obj) {
	return obj != nullptr && obj->klass() == vmClasses::ResolvedMethodName_klass();
	}

	inline bool java_lang_invoke_MethodType::is_instance(oop obj) {
	return obj != nullptr && obj->klass() == vmClasses::MethodType_klass();
	}

	inline bool java_lang_invoke_MethodHandle::is_instance(oop obj) {
	return obj != nullptr && is_subclass(obj->klass());
	}

	inline bool java_lang_Class::is_instance(oop obj) {
	return obj != nullptr && obj->klass() == vmClasses::Class_klass();
	}

	inline Klass* java_lang_Class::as_Klass(oop java_class) {
	//%note memory_2
	assert(java_lang_Class::is_instance(java_class), "must be a Class object");
	Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
	assert(k == nullptr \|\| k->is_klass(), "type check");
	return k;
	}

	inline bool java_lang_Class::is_primitive(oop java_class) {
	// should assert:
	//assert(java_lang_Class::is_instance(java_class), "must be a Class object");
	bool is_primitive = (java_class->metadata_field(_klass_offset) == nullptr);

	#ifdef ASSERT
	if (is_primitive) {
	Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
	assert(k == nullptr \|\| is_java_primitive(ArrayKlass::cast(k)->element_type()),
	"Should be either the T_VOID primitive or a java primitive");
	}
	#endif

	return is_primitive;
	}

	inline size_t java_lang_Class::oop_size(oop java_class) {
	assert(_oop_size_offset != 0, "must be set");
	int size = java_class->int_field(_oop_size_offset);
	assert(size > 0, "Oop size must be greater than zero, not %d", size);
	return size;
	}

	inline bool java_lang_invoke_DirectMethodHandle::is_instance(oop obj) {
	return obj != nullptr && is_subclass(obj->klass());
	}

	inline bool java_lang_Module::is_instance(oop obj) {
	return obj != nullptr && obj->klass() == vmClasses::Module_klass();
	}

	inline int Backtrace::merge_bci_and_version(int bci, int version) {
	// only store u2 for version, checking for overflow.
	if (version > USHRT_MAX \|\| version < 0) version = USHRT_MAX;
	assert((jushort)bci == bci, "bci should be short");
	return build_int_from_shorts(version, bci);
	}

	inline int Backtrace::merge_mid_and_cpref(int mid, int cpref) {
	// only store u2 for mid and cpref, checking for overflow.
	assert((jushort)mid == mid, "mid should be short");
	assert((jushort)cpref == cpref, "cpref should be short");
	return build_int_from_shorts(cpref, mid);
	}

	inline int Backtrace::bci_at(unsigned int merged) {
	return extract_high_short_from_int(merged);
	}

	inline int Backtrace::version_at(unsigned int merged) {
	return extract_low_short_from_int(merged);
	}

	inline int Backtrace::mid_at(unsigned int merged) {
	return extract_high_short_from_int(merged);
	}

	inline int Backtrace::cpref_at(unsigned int merged) {
	return extract_low_short_from_int(merged);
	}

	inline int Backtrace::get_line_number(Method* method, int bci) {
	int line_number = 0;
	if (method->is_native()) {
	// Negative value different from -1 below, enabling Java code in
	// class java.lang.StackTraceElement to distinguish "native" from
	// "no LineNumberTable". JDK tests for -2.
	line_number = -2;
	} else {
	// Returns -1 if no LineNumberTable, and otherwise actual line number
	line_number = method->line_number_from_bci(bci);
	}
	return line_number;
	}

	inline Symbol* Backtrace::get_source_file_name(InstanceKlass* holder, int version) {
	// RedefineClasses() currently permits redefine operations to
	// happen in parallel using a "last one wins" philosophy. That
	// spec laxness allows the constant pool entry associated with
	// the source_file_name_index for any older constant pool version
	// to be unstable so we shouldn't try to use it.
	if (holder->constants()->version() != version) {
	return nullptr;
	} else {
	return holder->source_file_name();
	}
	}

	#endif // SHARE_CLASSFILE_JAVACLASSES_INLINE_HPP