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jdk-24/hotspot/src/share/vm/classfile/javaClasses.hpp

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/*
* Copyright (c) 1997, 2011, 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_VM_CLASSFILE_JAVACLASSES_HPP
#define SHARE_VM_CLASSFILE_JAVACLASSES_HPP
#include "classfile/systemDictionary.hpp"
#include "jvmtifiles/jvmti.h"
#include "oops/oop.hpp"
#include "runtime/os.hpp"
#include "utilities/utf8.hpp"
// Interface for manipulating the basic Java classes.
//
// All dependencies on layout of actual Java classes should be kept here.
// If the layout of any of the classes above changes the offsets must be adjusted.
//
// For most classes we hardwire the offsets for performance reasons. In certain
// cases (e.g. java.security.AccessControlContext) we compute the offsets at
// startup since the layout here differs between JDK1.2 and JDK1.3.
//
// Note that fields (static and non-static) are arranged with oops before non-oops
// on a per class basis. The offsets below have to reflect this ordering.
//
// When editing the layouts please update the check_offset verification code
// correspondingly. The names in the enums must be identical to the actual field
// names in order for the verification code to work.
// Interface to java.lang.String objects
class java_lang_String : AllStatic {
private:
enum {
hc_value_offset = 0,
hc_offset_offset = 1
//hc_count_offset = 2 -- not a word-scaled offset
//hc_hash_offset = 3 -- not a word-scaled offset
};
static int value_offset;
static int offset_offset;
static int count_offset;
static int hash_offset;
static Handle basic_create(int length, bool tenured, TRAPS);
static Handle basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS);
static void set_value( oop string, typeArrayOop buffer) { string->obj_field_put(value_offset, (oop)buffer); }
static void set_offset(oop string, int offset) { string->int_field_put(offset_offset, offset); }
static void set_count( oop string, int count) { string->int_field_put(count_offset, count); }
public:
// Instance creation
static Handle create_from_unicode(jchar* unicode, int len, TRAPS);
static Handle create_tenured_from_unicode(jchar* unicode, int len, TRAPS);
static oop create_oop_from_unicode(jchar* unicode, int len, TRAPS);
static Handle create_from_str(const char* utf8_str, TRAPS);
static oop create_oop_from_str(const char* utf8_str, TRAPS);
static Handle create_from_symbol(Symbol* symbol, TRAPS);
static Handle create_from_platform_dependent_str(const char* str, TRAPS);
static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
static int value_offset_in_bytes() { return value_offset; }
static int count_offset_in_bytes() { return count_offset; }
static int offset_offset_in_bytes() { return offset_offset; }
static int hash_offset_in_bytes() { return hash_offset; }
// Accessors
static typeArrayOop value(oop java_string) {
assert(is_instance(java_string), "must be java_string");
return (typeArrayOop) java_string->obj_field(value_offset);
}
static int offset(oop java_string) {
assert(is_instance(java_string), "must be java_string");
return java_string->int_field(offset_offset);
}
static int length(oop java_string) {
assert(is_instance(java_string), "must be java_string");
return java_string->int_field(count_offset);
}
static int utf8_length(oop java_string);
// String converters
static char* as_utf8_string(oop java_string);
static char* as_utf8_string(oop java_string, char* buf, int buflen);
static char* as_utf8_string(oop java_string, int start, int len);
static char* as_platform_dependent_str(Handle java_string, TRAPS);
static jchar* as_unicode_string(oop java_string, int& length);
// Compute the hash value for a java.lang.String object which would
// contain the characters passed in. This hash value is used for at
// least two purposes.
//
// (a) As the hash value used by the StringTable for bucket selection
// and comparison (stored in the HashtableEntry structures). This
// is used in the String.intern() method.
//
// (b) As the hash value used by the String object itself, in
// String.hashCode(). This value is normally calculate in Java code
// in the String.hashCode method(), but is precomputed for String
// objects in the shared archive file.
//
// For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
static unsigned int hash_string(jchar* s, int len) {
unsigned int h = 0;
while (len-- > 0) {
h = 31*h + (unsigned int) *s;
s++;
}
return h;
}
static unsigned int hash_string(oop java_string);
static bool equals(oop java_string, jchar* chars, int len);
// Conversion between '.' and '/' formats
static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
// Conversion
static Symbol* as_symbol(Handle java_string, TRAPS);
static Symbol* as_symbol_or_null(oop java_string);
// Testers
static bool is_instance(oop obj) {
return obj != NULL && obj->klass() == SystemDictionary::String_klass();
}
// Debugging
static void print(Handle java_string, outputStream* st);
friend class JavaClasses;
};
// Interface to java.lang.Class objects
class java_lang_Class : AllStatic {
friend class VMStructs;
private:
// The fake offsets are added by the class loader when java.lang.Class is loaded
enum {
hc_number_of_fake_oop_fields = 3,
hc_number_of_fake_int_fields = 2
};
static int klass_offset;
static int resolved_constructor_offset;
static int array_klass_offset;
static int number_of_fake_oop_fields;
static int oop_size_offset;
static int static_oop_field_count_offset;
static void compute_offsets();
static bool offsets_computed;
static int classRedefinedCount_offset;
static int parallelCapable_offset;
public:
// Instance creation
static oop create_mirror(KlassHandle k, TRAPS);
static void fixup_mirror(KlassHandle k, TRAPS);
static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
// Conversion
static klassOop as_klassOop(oop java_class);
static BasicType as_BasicType(oop java_class, klassOop* reference_klass = NULL);
static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
klassOop refk_oop = NULL;
BasicType result = as_BasicType(java_class, &refk_oop);
(*reference_klass) = KlassHandle(refk_oop);
return result;
}
static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
static void print_signature(oop java_class, outputStream *st);
// Testing
static bool is_instance(oop obj) {
return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
}
static bool is_primitive(oop java_class);
static BasicType primitive_type(oop java_class);
static oop primitive_mirror(BasicType t);
// JVM_NewInstance support
static methodOop resolved_constructor(oop java_class);
static void set_resolved_constructor(oop java_class, methodOop constructor);
// JVM_NewArray support
static klassOop array_klass(oop java_class);
static void set_array_klass(oop java_class, klassOop klass);
// compiler support for class operations
static int klass_offset_in_bytes() { return klass_offset; }
static int resolved_constructor_offset_in_bytes() { return resolved_constructor_offset; }
static int array_klass_offset_in_bytes() { return array_klass_offset; }
// Support for classRedefinedCount field
static int classRedefinedCount(oop the_class_mirror);
static void set_classRedefinedCount(oop the_class_mirror, int value);
// Support for parallelCapable field
static bool parallelCapable(oop the_class_mirror);
static int oop_size(oop java_class);
static void set_oop_size(oop java_class, int size);
static int static_oop_field_count(oop java_class);
static void set_static_oop_field_count(oop java_class, int size);
// Debugging
friend class JavaClasses;
friend class instanceKlass; // verification code accesses offsets
friend class ClassFileParser; // access to number_of_fake_fields
};
// Interface to java.lang.Thread objects
class java_lang_Thread : AllStatic {
private:
// Note that for this class the layout changed between JDK1.2 and JDK1.3,
// so we compute the offsets at startup rather than hard-wiring them.
static int _name_offset;
static int _group_offset;
static int _contextClassLoader_offset;
static int _inheritedAccessControlContext_offset;
static int _priority_offset;
static int _eetop_offset;
static int _daemon_offset;
static int _stillborn_offset;
static int _stackSize_offset;
static int _tid_offset;
static int _thread_status_offset;
static int _park_blocker_offset;
static int _park_event_offset ;
static void compute_offsets();
public:
// Instance creation
static oop create();
// Returns the JavaThread associated with the thread obj
static JavaThread* thread(oop java_thread);
// Set JavaThread for instance
static void set_thread(oop java_thread, JavaThread* thread);
// Name
static typeArrayOop name(oop java_thread);
static void set_name(oop java_thread, typeArrayOop name);
// Priority
static ThreadPriority priority(oop java_thread);
static void set_priority(oop java_thread, ThreadPriority priority);
// Thread group
static oop threadGroup(oop java_thread);
// Stillborn
static bool is_stillborn(oop java_thread);
static void set_stillborn(oop java_thread);
// Alive (NOTE: this is not really a field, but provides the correct
// definition without doing a Java call)
static bool is_alive(oop java_thread);
// Daemon
static bool is_daemon(oop java_thread);
static void set_daemon(oop java_thread);
// Context ClassLoader
static oop context_class_loader(oop java_thread);
// Control context
static oop inherited_access_control_context(oop java_thread);
// Stack size hint
static jlong stackSize(oop java_thread);
// Thread ID
static jlong thread_id(oop java_thread);
// Blocker object responsible for thread parking
static oop park_blocker(oop java_thread);
// Pointer to type-stable park handler, encoded as jlong.
// Should be set when apparently null
// For details, see unsafe.cpp Unsafe_Unpark
static jlong park_event(oop java_thread);
static bool set_park_event(oop java_thread, jlong ptr);
// Java Thread Status for JVMTI and M&M use.
// This thread status info is saved in threadStatus field of
// java.lang.Thread java class.
enum ThreadStatus {
NEW = 0,
RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running
JVMTI_THREAD_STATE_RUNNABLE,
SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep()
JVMTI_THREAD_STATE_WAITING +
JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
JVMTI_THREAD_STATE_SLEEPING,
IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait()
JVMTI_THREAD_STATE_WAITING +
JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long)
JVMTI_THREAD_STATE_WAITING +
JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park()
JVMTI_THREAD_STATE_WAITING +
JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
JVMTI_THREAD_STATE_PARKED,
PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long)
JVMTI_THREAD_STATE_WAITING +
JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
JVMTI_THREAD_STATE_PARKED,
BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block
JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
TERMINATED = JVMTI_THREAD_STATE_TERMINATED
};
// Write thread status info to threadStatus field of java.lang.Thread.
static void set_thread_status(oop java_thread_oop, ThreadStatus status);
// Read thread status info from threadStatus field of java.lang.Thread.
static ThreadStatus get_thread_status(oop java_thread_oop);
static const char* thread_status_name(oop java_thread_oop);
// Debugging
friend class JavaClasses;
};
// Interface to java.lang.ThreadGroup objects
class java_lang_ThreadGroup : AllStatic {
private:
static int _parent_offset;
static int _name_offset;
static int _threads_offset;
static int _groups_offset;
static int _maxPriority_offset;
static int _destroyed_offset;
static int _daemon_offset;
static int _vmAllowSuspension_offset;
static int _nthreads_offset;
static int _ngroups_offset;
static void compute_offsets();
public:
// parent ThreadGroup
static oop parent(oop java_thread_group);
// name
static typeArrayOop name(oop java_thread_group);
// ("name as oop" accessor is not necessary)
// Number of threads in group
static int nthreads(oop java_thread_group);
// threads
static objArrayOop threads(oop java_thread_group);
// Number of threads in group
static int ngroups(oop java_thread_group);
// groups
static objArrayOop groups(oop java_thread_group);
// maxPriority in group
static ThreadPriority maxPriority(oop java_thread_group);
// Destroyed
static bool is_destroyed(oop java_thread_group);
// Daemon
static bool is_daemon(oop java_thread_group);
// vmAllowSuspension
static bool is_vmAllowSuspension(oop java_thread_group);
// Debugging
friend class JavaClasses;
};
// Interface to java.lang.Throwable objects
class java_lang_Throwable: AllStatic {
friend class BacktraceBuilder;
private:
// Offsets
enum {
hc_backtrace_offset = 0,
hc_detailMessage_offset = 1,
hc_cause_offset = 2, // New since 1.4
hc_stackTrace_offset = 3 // New since 1.4
};
// Trace constants
enum {
trace_methods_offset = 0,
trace_bcis_offset = 1,
trace_next_offset = 2,
trace_size = 3,
trace_chunk_size = 32
};
static int backtrace_offset;
static int detailMessage_offset;
static int cause_offset;
static int stackTrace_offset;
// Printing
static char* print_stack_element_to_buffer(methodOop method, int bci);
static void print_to_stream(Handle stream, const char* str);
// StackTrace (programmatic access, new since 1.4)
static void clear_stacktrace(oop throwable);
// No stack trace available
static const char* no_stack_trace_message();
public:
// Backtrace
static oop backtrace(oop throwable);
static void set_backtrace(oop throwable, oop value);
// Needed by JVMTI to filter out this internal field.
static int get_backtrace_offset() { return backtrace_offset;}
static int get_detailMessage_offset() { return detailMessage_offset;}
// Message
static oop message(oop throwable);
static oop message(Handle throwable);
static void set_message(oop throwable, oop value);
// Print stack trace stored in exception by call-back to Java
// Note: this is no longer used in Merlin, but we still suppport
// it for compatibility.
static void print_stack_trace(oop throwable, oop print_stream);
static void print_stack_element(Handle stream, methodOop method, int bci);
static void print_stack_element(outputStream *st, methodOop method, int bci);
static void print_stack_usage(Handle stream);
// Allocate space for backtrace (created but stack trace not filled in)
static void allocate_backtrace(Handle throwable, TRAPS);
// Fill in current stack trace for throwable with preallocated backtrace (no GC)
static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
// Fill in current stack trace, can cause GC
static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS);
static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle());
// Programmatic access to stack trace
static oop get_stack_trace_element(oop throwable, int index, TRAPS);
static int get_stack_trace_depth(oop throwable, TRAPS);
// Printing
static void print(oop throwable, outputStream* st);
static void print(Handle throwable, outputStream* st);
static void print_stack_trace(oop throwable, outputStream* st);
// Debugging
friend class JavaClasses;
};
// Interface to java.lang.reflect.AccessibleObject objects
class java_lang_reflect_AccessibleObject: AllStatic {
private:
// Note that to reduce dependencies on the JDK we compute these
// offsets at run-time.
static int override_offset;
static void compute_offsets();
public:
// Accessors
static jboolean override(oop reflect);
static void set_override(oop reflect, jboolean value);
// Debugging
friend class JavaClasses;
};
// Interface to java.lang.reflect.Method objects
class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
private:
// Note that to reduce dependencies on the JDK we compute these
// offsets at run-time.
static int clazz_offset;
static int name_offset;
static int returnType_offset;
static int parameterTypes_offset;
static int exceptionTypes_offset;
static int slot_offset;
static int modifiers_offset;
static int signature_offset;
static int annotations_offset;
static int parameter_annotations_offset;
static int annotation_default_offset;
static void compute_offsets();
public:
// Allocation
static Handle create(TRAPS);
// Accessors
static oop clazz(oop reflect);
static void set_clazz(oop reflect, oop value);
static oop name(oop method);
static void set_name(oop method, oop value);
static oop return_type(oop method);
static void set_return_type(oop method, oop value);
static oop parameter_types(oop method);
static void set_parameter_types(oop method, oop value);
static oop exception_types(oop method);
static void set_exception_types(oop method, oop value);
static int slot(oop reflect);
static void set_slot(oop reflect, int value);
static int modifiers(oop method);
static void set_modifiers(oop method, int value);
static bool has_signature_field();
static oop signature(oop method);
static void set_signature(oop method, oop value);
static bool has_annotations_field();
static oop annotations(oop method);
static void set_annotations(oop method, oop value);
static bool has_parameter_annotations_field();
static oop parameter_annotations(oop method);
static void set_parameter_annotations(oop method, oop value);
static bool has_annotation_default_field();
static oop annotation_default(oop method);
static void set_annotation_default(oop method, oop value);
// Debugging
friend class JavaClasses;
};
// Interface to java.lang.reflect.Constructor objects
class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
private:
// Note that to reduce dependencies on the JDK we compute these
// offsets at run-time.
static int clazz_offset;
static int parameterTypes_offset;
static int exceptionTypes_offset;
static int slot_offset;
static int modifiers_offset;
static int signature_offset;
static int annotations_offset;
static int parameter_annotations_offset;
static void compute_offsets();
public:
// Allocation
static Handle create(TRAPS);
// Accessors
static oop clazz(oop reflect);
static void set_clazz(oop reflect, oop value);
static oop parameter_types(oop constructor);
static void set_parameter_types(oop constructor, oop value);
static oop exception_types(oop constructor);
static void set_exception_types(oop constructor, oop value);
static int slot(oop reflect);
static void set_slot(oop reflect, int value);
static int modifiers(oop constructor);
static void set_modifiers(oop constructor, int value);
static bool has_signature_field();
static oop signature(oop constructor);
static void set_signature(oop constructor, oop value);
static bool has_annotations_field();
static oop annotations(oop constructor);
static void set_annotations(oop constructor, oop value);
static bool has_parameter_annotations_field();
static oop parameter_annotations(oop method);
static void set_parameter_annotations(oop method, oop value);
// Debugging
friend class JavaClasses;
};
// Interface to java.lang.reflect.Field objects
class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
private:
// Note that to reduce dependencies on the JDK we compute these
// offsets at run-time.
static int clazz_offset;
static int name_offset;
static int type_offset;
static int slot_offset;
static int modifiers_offset;
static int signature_offset;
static int annotations_offset;
static void compute_offsets();
public:
// Allocation
static Handle create(TRAPS);
// Accessors
static oop clazz(oop reflect);
static void set_clazz(oop reflect, oop value);
static oop name(oop field);
static void set_name(oop field, oop value);
static oop type(oop field);
static void set_type(oop field, oop value);
static int slot(oop reflect);
static void set_slot(oop reflect, int value);
static int modifiers(oop field);
static void set_modifiers(oop field, int value);
static bool has_signature_field();
static oop signature(oop constructor);
static void set_signature(oop constructor, oop value);
static bool has_annotations_field();
static oop annotations(oop constructor);
static void set_annotations(oop constructor, oop value);
static bool has_parameter_annotations_field();
static oop parameter_annotations(oop method);
static void set_parameter_annotations(oop method, oop value);
static bool has_annotation_default_field();
static oop annotation_default(oop method);
static void set_annotation_default(oop method, oop value);
// Debugging
friend class JavaClasses;
};
// Interface to sun.reflect.ConstantPool objects
class sun_reflect_ConstantPool {
private:
// Note that to reduce dependencies on the JDK we compute these
// offsets at run-time.
static int _cp_oop_offset;
static void compute_offsets();
public:
// Allocation
static Handle create(TRAPS);
// Accessors
static oop cp_oop(oop reflect);
static void set_cp_oop(oop reflect, oop value);
static int cp_oop_offset() {
return _cp_oop_offset;
}
// Debugging
friend class JavaClasses;
};
// Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
class sun_reflect_UnsafeStaticFieldAccessorImpl {
private:
static int _base_offset;
static void compute_offsets();
public:
static int base_offset() {
return _base_offset;
}
// Debugging
friend class JavaClasses;
};
// Interface to java.lang primitive type boxing objects:
// - java.lang.Boolean
// - java.lang.Character
// - java.lang.Float
// - java.lang.Double
// - java.lang.Byte
// - java.lang.Short
// - java.lang.Integer
// - java.lang.Long
// This could be separated out into 8 individual classes.
class java_lang_boxing_object: AllStatic {
private:
enum {
hc_value_offset = 0
};
static int value_offset;
static int long_value_offset;
static oop initialize_and_allocate(BasicType type, TRAPS);
public:
// Allocation. Returns a boxed value, or NULL for invalid type.
static oop create(BasicType type, jvalue* value, TRAPS);
// Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
static BasicType get_value(oop box, jvalue* value);
static BasicType set_value(oop box, jvalue* value);
static BasicType basic_type(oop box);
static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); }
static void print(BasicType type, jvalue* value, outputStream* st);
static int value_offset_in_bytes(BasicType type) {
return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
value_offset;
}
// Debugging
friend class JavaClasses;
};
// Interface to java.lang.ref.Reference objects
class java_lang_ref_Reference: AllStatic {
public:
enum {
hc_referent_offset = 0,
hc_queue_offset = 1,
hc_next_offset = 2,
hc_discovered_offset = 3 // Is not last, see SoftRefs.
};
enum {
hc_static_lock_offset = 0,
hc_static_pending_offset = 1
};
static int referent_offset;
static int queue_offset;
static int next_offset;
static int discovered_offset;
static int static_lock_offset;
static int static_pending_offset;
static int number_of_fake_oop_fields;
// Accessors
static oop referent(oop ref) {
return ref->obj_field(referent_offset);
}
static void set_referent(oop ref, oop value) {
ref->obj_field_put(referent_offset, value);
}
static void set_referent_raw(oop ref, oop value) {
ref->obj_field_raw_put(referent_offset, value);
}
static HeapWord* referent_addr(oop ref) {
return ref->obj_field_addr<HeapWord>(referent_offset);
}
static oop next(oop ref) {
return ref->obj_field(next_offset);
}
static void set_next(oop ref, oop value) {
ref->obj_field_put(next_offset, value);
}
static void set_next_raw(oop ref, oop value) {
ref->obj_field_raw_put(next_offset, value);
}
static HeapWord* next_addr(oop ref) {
return ref->obj_field_addr<HeapWord>(next_offset);
}
static oop discovered(oop ref) {
return ref->obj_field(discovered_offset);
}
static void set_discovered(oop ref, oop value) {
ref->obj_field_put(discovered_offset, value);
}
static void set_discovered_raw(oop ref, oop value) {
ref->obj_field_raw_put(discovered_offset, value);
}
static HeapWord* discovered_addr(oop ref) {
return ref->obj_field_addr<HeapWord>(discovered_offset);
}
// Accessors for statics
static oop pending_list_lock();
static oop pending_list();
static HeapWord* pending_list_addr();
};
// Interface to java.lang.ref.SoftReference objects
class java_lang_ref_SoftReference: public java_lang_ref_Reference {
public:
enum {
// The timestamp is a long field and may need to be adjusted for alignment.
hc_timestamp_offset = hc_discovered_offset + 1
};
enum {
hc_static_clock_offset = 0
};
static int timestamp_offset;
static int static_clock_offset;
// Accessors
static jlong timestamp(oop ref);
// Accessors for statics
static jlong clock();
static void set_clock(jlong value);
};
// Interface to java.lang.invoke.MethodHandle objects
class MethodHandleEntry;
class java_lang_invoke_MethodHandle: AllStatic {
friend class JavaClasses;
private:
static int _vmentry_offset; // assembly code trampoline for MH
static int _vmtarget_offset; // class-specific target reference
static int _type_offset; // the MethodType of this MH
static int _vmslots_offset; // OPTIONAL hoisted type.form.vmslots
static void compute_offsets();
public:
// Accessors
static oop type(oop mh);
static void set_type(oop mh, oop mtype);
static oop vmtarget(oop mh);
static void set_vmtarget(oop mh, oop target);
static MethodHandleEntry* vmentry(oop mh);
static void set_vmentry(oop mh, MethodHandleEntry* data);
static int vmslots(oop mh);
static void init_vmslots(oop mh);
static int compute_vmslots(oop mh);
// Testers
static bool is_subclass(klassOop klass) {
return Klass::cast(klass)->is_subclass_of(SystemDictionary::MethodHandle_klass());
}
static bool is_instance(oop obj) {
return obj != NULL && is_subclass(obj->klass());
}
// Accessors for code generation:
static int type_offset_in_bytes() { return _type_offset; }
static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
static int vmentry_offset_in_bytes() { return _vmentry_offset; }
static int vmslots_offset_in_bytes() { return _vmslots_offset; }
};
class java_lang_invoke_DirectMethodHandle: public java_lang_invoke_MethodHandle {
friend class JavaClasses;
private:
// _vmtarget_offset; // method or class or interface
static int _vmindex_offset; // negative or vtable idx or itable idx
static void compute_offsets();
public:
// Accessors
static int vmindex(oop mh);
static void set_vmindex(oop mh, int index);
// Testers
static bool is_subclass(klassOop klass) {
return Klass::cast(klass)->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
}
static bool is_instance(oop obj) {
return obj != NULL && is_subclass(obj->klass());
}
// Accessors for code generation:
static int vmindex_offset_in_bytes() { return _vmindex_offset; }
};
class java_lang_invoke_BoundMethodHandle: public java_lang_invoke_MethodHandle {
friend class JavaClasses;
private:
static int _argument_offset; // argument value bound into this MH
static int _vmargslot_offset; // relevant argument slot (<= vmslots)
static void compute_offsets();
public:
static oop argument(oop mh);
static void set_argument(oop mh, oop ref);
static jint vmargslot(oop mh);
static void set_vmargslot(oop mh, jint slot);
// Testers
static bool is_subclass(klassOop klass) {
return Klass::cast(klass)->is_subclass_of(SystemDictionary::BoundMethodHandle_klass());
}
static bool is_instance(oop obj) {
return obj != NULL && is_subclass(obj->klass());
}
static int argument_offset_in_bytes() { return _argument_offset; }
static int vmargslot_offset_in_bytes() { return _vmargslot_offset; }
};
class java_lang_invoke_AdapterMethodHandle: public java_lang_invoke_BoundMethodHandle {
friend class JavaClasses;
private:
static int _conversion_offset; // type of conversion to apply
static void compute_offsets();
public:
static int conversion(oop mh);
static void set_conversion(oop mh, int conv);
// Testers
static bool is_subclass(klassOop klass) {
return Klass::cast(klass)->is_subclass_of(SystemDictionary::AdapterMethodHandle_klass());
}
static bool is_instance(oop obj) {
return obj != NULL && is_subclass(obj->klass());
}
// Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
enum {
OP_RETYPE_ONLY = 0x0, // no argument changes; straight retype
OP_RETYPE_RAW = 0x1, // straight retype, trusted (void->int, Object->T)
OP_CHECK_CAST = 0x2, // ref-to-ref conversion; requires a Class argument
OP_PRIM_TO_PRIM = 0x3, // converts from one primitive to another
OP_REF_TO_PRIM = 0x4, // unboxes a wrapper to produce a primitive
OP_PRIM_TO_REF = 0x5, // boxes a primitive into a wrapper
OP_SWAP_ARGS = 0x6, // swap arguments (vminfo is 2nd arg)
OP_ROT_ARGS = 0x7, // rotate arguments (vminfo is displaced arg)
OP_DUP_ARGS = 0x8, // duplicates one or more arguments (at TOS)
OP_DROP_ARGS = 0x9, // remove one or more argument slots
OP_COLLECT_ARGS = 0xA, // combine arguments using an auxiliary function
OP_SPREAD_ARGS = 0xB, // expand in place a varargs array (of known size)
OP_FOLD_ARGS = 0xC, // combine but do not remove arguments; prepend result
//OP_UNUSED_13 = 0xD, // unused code, perhaps for reified argument lists
CONV_OP_LIMIT = 0xE, // limit of CONV_OP enumeration
CONV_OP_MASK = 0xF00, // this nybble contains the conversion op field
CONV_TYPE_MASK = 0x0F, // fits T_ADDRESS and below
CONV_VMINFO_MASK = 0x0FF, // LSB is reserved for JVM use
CONV_VMINFO_SHIFT = 0, // position of bits in CONV_VMINFO_MASK
CONV_OP_SHIFT = 8, // position of bits in CONV_OP_MASK
CONV_DEST_TYPE_SHIFT = 12, // byte 2 has the adapter BasicType (if needed)
CONV_SRC_TYPE_SHIFT = 16, // byte 2 has the source BasicType (if needed)
CONV_STACK_MOVE_SHIFT = 20, // high 12 bits give signed SP change
CONV_STACK_MOVE_MASK = (1 << (32 - CONV_STACK_MOVE_SHIFT)) - 1
};
static int conversion_offset_in_bytes() { return _conversion_offset; }
};
// Interface to java.lang.invoke.MemberName objects
// (These are a private interface for Java code to query the class hierarchy.)
class java_lang_invoke_MemberName: AllStatic {
friend class JavaClasses;
private:
// From java.lang.invoke.MemberName:
// private Class<?> clazz; // class in which the method is defined
// private String name; // may be null if not yet materialized
// private Object type; // may be null if not yet materialized
// private int flags; // modifier bits; see reflect.Modifier
// private Object vmtarget; // VM-specific target value
// private int vmindex; // method index within class or interface
static int _clazz_offset;
static int _name_offset;
static int _type_offset;
static int _flags_offset;
static int _vmtarget_offset;
static int _vmindex_offset;
static void compute_offsets();
public:
// Accessors
static oop clazz(oop mname);
static void set_clazz(oop mname, oop clazz);
static oop type(oop mname);
static void set_type(oop mname, oop type);
static oop name(oop mname);
static void set_name(oop mname, oop name);
static int flags(oop mname);
static void set_flags(oop mname, int flags);
static int modifiers(oop mname) { return (u2) flags(mname); }
static void set_modifiers(oop mname, int mods)
{ set_flags(mname, (flags(mname) &~ (u2)-1) | (u2)mods); }
static oop vmtarget(oop mname);
static void set_vmtarget(oop mname, oop target);
static int vmindex(oop mname);
static void set_vmindex(oop mname, int index);
// Testers
static bool is_subclass(klassOop klass) {
return Klass::cast(klass)->is_subclass_of(SystemDictionary::MemberName_klass());
}
static bool is_instance(oop obj) {
return obj != NULL && is_subclass(obj->klass());
}
// Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
enum {
MN_IS_METHOD = 0x00010000, // method (not constructor)
MN_IS_CONSTRUCTOR = 0x00020000, // constructor
MN_IS_FIELD = 0x00040000, // field
MN_IS_TYPE = 0x00080000, // nested type
MN_SEARCH_SUPERCLASSES = 0x00100000, // for MHN.getMembers
MN_SEARCH_INTERFACES = 0x00200000, // for MHN.getMembers
VM_INDEX_UNINITIALIZED = -99
};
// Accessors for code generation:
static int clazz_offset_in_bytes() { return _clazz_offset; }
static int type_offset_in_bytes() { return _type_offset; }
static int name_offset_in_bytes() { return _name_offset; }
static int flags_offset_in_bytes() { return _flags_offset; }
static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
static int vmindex_offset_in_bytes() { return _vmindex_offset; }
};
// Interface to java.lang.invoke.MethodType objects
class java_lang_invoke_MethodType: AllStatic {
friend class JavaClasses;
private:
static int _rtype_offset;
static int _ptypes_offset;
static int _form_offset;
static void compute_offsets();
public:
// Accessors
static oop rtype(oop mt);
static objArrayOop ptypes(oop mt);
static oop form(oop mt);
static oop ptype(oop mt, int index);
static int ptype_count(oop mt);
static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS);
static void print_signature(oop mt, outputStream* st);
static bool is_instance(oop obj) {
return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
}
static bool equals(oop mt1, oop mt2);
// Accessors for code generation:
static int rtype_offset_in_bytes() { return _rtype_offset; }
static int ptypes_offset_in_bytes() { return _ptypes_offset; }
static int form_offset_in_bytes() { return _form_offset; }
};
class java_lang_invoke_MethodTypeForm: AllStatic {
friend class JavaClasses;
private:
static int _vmslots_offset; // number of argument slots needed
static int _vmlayout_offset; // object describing internal calling sequence
static int _erasedType_offset; // erasedType = canonical MethodType
static int _genericInvoker_offset; // genericInvoker = adapter for invokeGeneric
static void compute_offsets();
public:
// Accessors
static int vmslots(oop mtform);
static oop erasedType(oop mtform);
static oop genericInvoker(oop mtform);
static oop vmlayout(oop mtform);
static oop init_vmlayout(oop mtform, oop cookie);
// Accessors for code generation:
static int vmslots_offset_in_bytes() { return _vmslots_offset; }
static int vmlayout_offset_in_bytes() { return _vmlayout_offset; }
static int erasedType_offset_in_bytes() { return _erasedType_offset; }
static int genericInvoker_offset_in_bytes() { return _genericInvoker_offset; }
};
// Interface to java.lang.invoke.CallSite objects
class java_lang_invoke_CallSite: AllStatic {
friend class JavaClasses;
private:
static int _target_offset;
static int _caller_method_offset;
static int _caller_bci_offset;
static void compute_offsets();
public:
// Accessors
static oop target(oop site);
static void set_target(oop site, oop target);
static oop caller_method(oop site);
static void set_caller_method(oop site, oop ref);
static jint caller_bci(oop site);
static void set_caller_bci(oop site, jint bci);
// Testers
static bool is_subclass(klassOop klass) {
return Klass::cast(klass)->is_subclass_of(SystemDictionary::CallSite_klass());
}
static bool is_instance(oop obj) {
return obj != NULL && is_subclass(obj->klass());
}
// Accessors for code generation:
static int target_offset_in_bytes() { return _target_offset; }
static int caller_method_offset_in_bytes() { return _caller_method_offset; }
static int caller_bci_offset_in_bytes() { return _caller_bci_offset; }
};
// Interface to java.security.AccessControlContext objects
class java_security_AccessControlContext: AllStatic {
private:
// Note that for this class the layout changed between JDK1.2 and JDK1.3,
// so we compute the offsets at startup rather than hard-wiring them.
static int _context_offset;
static int _privilegedContext_offset;
static int _isPrivileged_offset;
static void compute_offsets();
public:
static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
// Debugging/initialization
friend class JavaClasses;
};
// Interface to java.lang.ClassLoader objects
class java_lang_ClassLoader : AllStatic {
private:
enum {
hc_parent_offset = 0
};
static int parent_offset;
public:
static oop parent(oop loader);
static bool is_trusted_loader(oop loader);
// Fix for 4474172
static oop non_reflection_class_loader(oop loader);
// Debugging
friend class JavaClasses;
};
// Interface to java.lang.System objects
class java_lang_System : AllStatic {
private:
enum {
hc_static_in_offset = 0,
hc_static_out_offset = 1,
hc_static_err_offset = 2
};
static int static_in_offset;
static int static_out_offset;
static int static_err_offset;
public:
static int in_offset_in_bytes();
static int out_offset_in_bytes();
static int err_offset_in_bytes();
// Debugging
friend class JavaClasses;
};
// Interface to java.lang.StackTraceElement objects
class java_lang_StackTraceElement: AllStatic {
private:
enum {
hc_declaringClass_offset = 0,
hc_methodName_offset = 1,
hc_fileName_offset = 2,
hc_lineNumber_offset = 3
};
static int declaringClass_offset;
static int methodName_offset;
static int fileName_offset;
static int lineNumber_offset;
public:
// Setters
static void set_declaringClass(oop element, oop value);
static void set_methodName(oop element, oop value);
static void set_fileName(oop element, oop value);
static void set_lineNumber(oop element, int value);
// Create an instance of StackTraceElement
static oop create(methodHandle m, int bci, TRAPS);
// Debugging
friend class JavaClasses;
};
// Interface to java.lang.AssertionStatusDirectives objects
class java_lang_AssertionStatusDirectives: AllStatic {
private:
enum {
hc_classes_offset,
hc_classEnabled_offset,
hc_packages_offset,
hc_packageEnabled_offset,
hc_deflt_offset
};
static int classes_offset;
static int classEnabled_offset;
static int packages_offset;
static int packageEnabled_offset;
static int deflt_offset;
public:
// Setters
static void set_classes(oop obj, oop val);
static void set_classEnabled(oop obj, oop val);
static void set_packages(oop obj, oop val);
static void set_packageEnabled(oop obj, oop val);
static void set_deflt(oop obj, bool val);
// Debugging
friend class JavaClasses;
};
class java_nio_Buffer: AllStatic {
private:
static int _limit_offset;
public:
static int limit_offset();
static void compute_offsets();
};
class sun_misc_AtomicLongCSImpl: AllStatic {
private:
static int _value_offset;
public:
static int value_offset();
static void compute_offsets();
};
class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
private:
static int _owner_offset;
public:
static void initialize(TRAPS);
static oop get_owner_threadObj(oop obj);
};
// Interface to hard-coded offset checking
class JavaClasses : AllStatic {
private:
static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
public:
static void compute_hard_coded_offsets();
static void compute_offsets();
static void check_offsets() PRODUCT_RETURN;
};
#endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP
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