jdk8-mips64-public/hotspot: src/share/vm/classfile/javaClasses.hpp@595c0f60d50d (annotated)

src/share/vm/classfile/javaClasses.hpp@595c0f60d50d (annotated)

src/share/vm/classfile/javaClasses.hpp

Tue, 18 Mar 2014 19:07:22 +0100

author: pliden
date: Tue, 18 Mar 2014 19:07:22 +0100
changeset 6413: 595c0f60d50d
parent 5743: 63147986a428
child 6626: 9428a0b94204
permissions: -rw-r--r--

8029075: String deduplication in G1
Summary: Implementation of JEP 192, http://openjdk.java.net/jeps/192
Reviewed-by: brutisso, tschatzl, coleenp

 /*
  * Copyright (c) 1997, 2014, 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:
   static int value_offset;
   static int offset_offset;
   static int count_offset;
   static int hash_offset;
   static bool initialized;
   static Handle basic_create(int length, TRAPS);
   static void set_offset(oop string, int offset) {
     assert(initialized, "Must be initialized");
     if (offset_offset > 0) {
       string->int_field_put(offset_offset, offset);
     }
   }
   static void set_count( oop string, int count) {
     assert(initialized, "Must be initialized");
     if (count_offset > 0) {
       string->int_field_put(count_offset,  count);
     }
   }
  public:
   static void compute_offsets();
   // Instance creation
   static Handle create_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 bool has_offset_field()  {
     assert(initialized, "Must be initialized");
     return (offset_offset > 0);
   }
   static bool has_count_field()  {
     assert(initialized, "Must be initialized");
     return (count_offset > 0);
   }
   static bool has_hash_field()  {
     assert(initialized, "Must be initialized");
     return (hash_offset > 0);
   }
   static int value_offset_in_bytes()  {
     assert(initialized && (value_offset > 0), "Must be initialized");
     return value_offset;
   }
   static int count_offset_in_bytes()  {
     assert(initialized && (count_offset > 0), "Must be initialized");
     return count_offset;
   }
   static int offset_offset_in_bytes() {
     assert(initialized && (offset_offset > 0), "Must be initialized");
     return offset_offset;
   }
   static int hash_offset_in_bytes()   {
     assert(initialized && (hash_offset > 0), "Must be initialized");
     return hash_offset;
   }
   static void set_value(oop string, typeArrayOop buffer) {
     assert(initialized && (value_offset > 0), "Must be initialized");
     string->obj_field_put(value_offset, (oop)buffer);
   }
   static void set_hash(oop string, unsigned int hash) {
     assert(initialized && (hash_offset > 0), "Must be initialized");
     string->int_field_put(hash_offset, hash);
   }
   // Accessors
   static typeArrayOop value(oop java_string) {
     assert(initialized && (value_offset > 0), "Must be initialized");
     assert(is_instance(java_string), "must be java_string");
     return (typeArrayOop) java_string->obj_field(value_offset);
   }
   static unsigned int hash(oop java_string) {
     assert(initialized && (hash_offset > 0), "Must be initialized");
     assert(is_instance(java_string), "must be java_string");
     return java_string->int_field(hash_offset);
   }
   static int offset(oop java_string) {
     assert(initialized, "Must be initialized");
     assert(is_instance(java_string), "must be java_string");
     if (offset_offset > 0) {
       return java_string->int_field(offset_offset);
     } else {
       return 0;
     }
   }
   static int length(oop java_string) {
     assert(initialized, "Must be initialized");
     assert(is_instance(java_string), "must be java_string");
     if (count_offset > 0) {
       return java_string->int_field(count_offset);
     } else {
       return ((typeArrayOop)java_string->obj_field(value_offset))->length();
     }
   }
   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, TRAPS);
   // produce an ascii string with all other values quoted using \u####
   static char*  as_quoted_ascii(oop java_string);
   // Compute the hash value for a java.lang.String object which would
   // contain the characters passed in.
   //
   // As the hash value used by the String object itself, in
   // String.hashCode().  This value is normally calculated in Java code
   // in the String.hashCode method(), but is precomputed for String
   // objects in the shared archive file.
   // hash P(31) from Kernighan & Ritchie
   //
   // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
   template <typename T> static unsigned int hash_code(T* s, int len) {
     unsigned int h = 0;
     while (len-- > 0) {
       h = 31*h + (unsigned int) *s;
       s++;
     }
     return h;
   }
   static unsigned int hash_code(oop java_string);
   // This is the string hash code used by the StringTable, which may be
   // the same as String.hashCode or an alternate hash code.
   static unsigned int hash_string(oop java_string);
   static bool equals(oop java_string, jchar* chars, int len);
   static bool equals(oop str1, oop str2);
   // 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
 #define CLASS_INJECTED_FIELDS(macro)                                       \
   macro(java_lang_Class, klass,                  intptr_signature,  false) \
   macro(java_lang_Class, array_klass,            intptr_signature,  false) \
   macro(java_lang_Class, oop_size,               int_signature,     false) \
   macro(java_lang_Class, static_oop_field_count, int_signature,     false) \
   macro(java_lang_Class, protection_domain,      object_signature,  false) \
   macro(java_lang_Class, init_lock,              object_signature,  false) \
   macro(java_lang_Class, signers,                object_signature,  false)
 class java_lang_Class : AllStatic {
   friend class VMStructs;
  private:
   // The fake offsets are added by the class loader when java.lang.Class is loaded
   static int _klass_offset;
   static int _array_klass_offset;
   static int _oop_size_offset;
   static int _static_oop_field_count_offset;
   static int _protection_domain_offset;
   static int _init_lock_offset;
   static int _signers_offset;
   static bool offsets_computed;
   static int classRedefinedCount_offset;
   static GrowableArray<Klass*>* _fixup_mirror_list;
   static void set_init_lock(oop java_class, oop init_lock);
   static void set_protection_domain(oop java_class, oop protection_domain);
  public:
   static void compute_offsets();
   // Instance creation
   static oop  create_mirror(KlassHandle k, Handle protection_domain, TRAPS);
   static void fixup_mirror(KlassHandle k, TRAPS);
   static oop  create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
   // Conversion
   static Klass* as_Klass(oop java_class);
   static void set_klass(oop java_class, Klass* klass);
   static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
   static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
     Klass* 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_NewArray support
   static Klass* array_klass(oop java_class);
   static void set_array_klass(oop java_class, Klass* klass);
   // compiler support for class operations
   static int klass_offset_in_bytes()                { return _klass_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 embedded per-class oops
   static oop  protection_domain(oop java_class);
   static oop  init_lock(oop java_class);
   static objArrayOop  signers(oop java_class);
   static void set_signers(oop java_class, objArrayOop signers);
   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);
   static GrowableArray<Klass*>* fixup_mirror_list() {
     return _fixup_mirror_list;
   }
   static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
     _fixup_mirror_list = v;
   }
   // 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
   };
   enum {
       hc_static_unassigned_stacktrace_offset = 0  // New since 1.7
   };
   // Trace constants
   enum {
     trace_methods_offset = 0,
     trace_bcis_offset    = 1,
     trace_mirrors_offset = 2,
     trace_next_offset    = 3,
     trace_size           = 4,
     trace_chunk_size     = 32
   };
   static int backtrace_offset;
   static int detailMessage_offset;
   static int cause_offset;
   static int stackTrace_offset;
   static int static_unassigned_stacktrace_offset;
   // Printing
   static char* print_stack_element_to_buffer(Handle mirror, int method, int version, int bci);
   // StackTrace (programmatic access, new since 1.4)
   static void clear_stacktrace(oop throwable);
   // No stack trace available
   static const char* no_stack_trace_message();
   // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
   static void set_stacktrace(oop throwable, oop st_element_array);
   static oop unassigned_stacktrace();
  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);
   static void print_stack_element(outputStream *st, Handle mirror, int method,
                                   int version, int bci);
   static void print_stack_element(outputStream *st, methodHandle 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 int type_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 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);
   static bool has_type_annotations_field();
   static oop type_annotations(oop method);
   static void set_type_annotations(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 int type_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);
   static bool has_type_annotations_field();
   static oop type_annotations(oop constructor);
   static void set_type_annotations(oop constructor, 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 int type_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);
   static bool has_type_annotations_field();
   static oop type_annotations(oop field);
   static void set_type_annotations(oop field, oop value);
   // Debugging
   friend class JavaClasses;
 };
 class java_lang_reflect_Parameter {
  private:
   // Note that to reduce dependencies on the JDK we compute these
   // offsets at run-time.
   static int name_offset;
   static int modifiers_offset;
   static int index_offset;
   static int executable_offset;
   static void compute_offsets();
  public:
   // Allocation
   static Handle create(TRAPS);
   // Accessors
   static oop name(oop field);
   static void set_name(oop field, oop value);
   static int index(oop reflect);
   static void set_index(oop reflect, int value);
   static int modifiers(oop reflect);
   static void set_modifiers(oop reflect, int value);
   static oop executable(oop constructor);
   static void set_executable(oop constructor, oop value);
   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 _oop_offset;
   static void compute_offsets();
  public:
   // Allocation
   static Handle create(TRAPS);
   // Accessors
   static void set_cp(oop reflect, ConstantPool* value);
   static int oop_offset() {
     return _oop_offset;
   }
   static ConstantPool* get_cp(oop reflect);
   // 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_put_raw(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_put_raw(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_put_raw(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_lock_addr();
   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 _type_offset;               // the MethodType of this MH
   static int _form_offset;               // the LambdaForm of this MH
   static void compute_offsets();
  public:
   // Accessors
   static oop            type(oop mh);
   static void       set_type(oop mh, oop mtype);
   static oop            form(oop mh);
   static void       set_form(oop mh, oop lform);
   // Testers
   static bool is_subclass(Klass* klass) {
     return 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 form_offset_in_bytes()             { return _form_offset; }
 };
 // Interface to java.lang.invoke.DirectMethodHandle objects
 class java_lang_invoke_DirectMethodHandle: AllStatic {
   friend class JavaClasses;
  private:
   static int _member_offset;               // the MemberName of this DMH
   static void compute_offsets();
  public:
   // Accessors
   static oop  member(oop mh);
   // Testers
   static bool is_subclass(Klass* klass) {
     return 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 member_offset_in_bytes()           { return _member_offset; }
 };
 // Interface to java.lang.invoke.LambdaForm objects
 // (These are a private interface for managing adapter code generation.)
 class java_lang_invoke_LambdaForm: AllStatic {
   friend class JavaClasses;
  private:
   static int _vmentry_offset;  // type is MemberName
   static void compute_offsets();
  public:
   // Accessors
   static oop            vmentry(oop lform);
   static void       set_vmentry(oop lform, oop invoker);
   // Testers
   static bool is_subclass(Klass* klass) {
     return SystemDictionary::LambdaForm_klass() != NULL &&
       klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
   }
   static bool is_instance(oop obj) {
     return obj != NULL && is_subclass(obj->klass());
   }
   // Accessors for code generation:
   static int vmentry_offset_in_bytes()          { return _vmentry_offset; }
 };
 // Interface to java.lang.invoke.MemberName objects
 // (These are a private interface for Java code to query the class hierarchy.)
 #define MEMBERNAME_INJECTED_FIELDS(macro)                               \
   macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
   macro(java_lang_invoke_MemberName, vmindex,  intptr_signature, false) \
   macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
 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 intptr     vmtarget;    // VM-specific target value
   //    private intptr_t   vmindex;     // member 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 _vmloader_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 Metadata*      vmtarget(oop mname);
   static void       set_vmtarget(oop mname, Metadata* target);
 #if INCLUDE_JVMTI
   static void       adjust_vmtarget(oop mname, Metadata* target);
 #endif // INCLUDE_JVMTI
   static intptr_t       vmindex(oop mname);
   static void       set_vmindex(oop mname, intptr_t index);
   // Testers
   static bool is_subclass(Klass* klass) {
     return 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_CALLER_SENSITIVE     = 0x00100000, // @CallerSensitive annotation detected
     MN_REFERENCE_KIND_SHIFT = 24, // refKind
     MN_REFERENCE_KIND_MASK  = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
     // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
     MN_SEARCH_SUPERCLASSES  = 0x00100000, // walk super classes
     MN_SEARCH_INTERFACES    = 0x00200000  // walk implemented interfaces
   };
   // 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 void compute_offsets();
  public:
   // Accessors
   static oop            rtype(oop mt);
   static objArrayOop    ptypes(oop mt);
   static oop            ptype(oop mt, int index);
   static int            ptype_count(oop mt);
   static int            ptype_slot_count(oop mt);  // extra counts for long/double
   static int            rtype_slot_count(oop mt);  // extra counts for long/double
   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; }
 };
 // Interface to java.lang.invoke.CallSite objects
 class java_lang_invoke_CallSite: AllStatic {
   friend class JavaClasses;
 private:
   static int _target_offset;
   static void compute_offsets();
 public:
   // Accessors
   static oop              target(         oop site)             { return site->obj_field(             _target_offset);         }
   static void         set_target(         oop site, oop target) {        site->obj_field_put(         _target_offset, target); }
   static volatile oop     target_volatile(oop site)             { return site->obj_field_volatile(    _target_offset);         }
   static void         set_target_volatile(oop site, oop target) {        site->obj_field_put_volatile(_target_offset, target); }
   // Testers
   static bool is_subclass(Klass* klass) {
     return 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; }
 };
 // 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 int _isAuthorized_offset;
   static void compute_offsets();
  public:
   static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
   static bool is_authorized(Handle context);
   // Debugging/initialization
   friend class JavaClasses;
 };
 // Interface to java.lang.ClassLoader objects
 #define CLASSLOADER_INJECTED_FIELDS(macro)                            \
   macro(java_lang_ClassLoader, loader_data,  intptr_signature, false)
 class java_lang_ClassLoader : AllStatic {
  private:
   // The fake offsets are added by the class loader when java.lang.Class is loaded
   enum {
    hc_parent_offset = 0
   };
   static int _loader_data_offset;
   static bool offsets_computed;
   static int parent_offset;
   static int parallelCapable_offset;
  public:
   static void compute_offsets();
   static ClassLoaderData** loader_data_addr(oop loader);
   static ClassLoaderData* loader_data(oop loader);
   static oop parent(oop loader);
   static bool isAncestor(oop loader, oop cl);
   // Support for parallelCapable field
   static bool parallelCapable(oop the_class_mirror);
   static bool is_trusted_loader(oop loader);
   // Fix for 4474172
   static oop  non_reflection_class_loader(oop loader);
   // Testers
   static bool is_subclass(Klass* klass) {
     return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
   }
   static bool is_instance(oop obj) {
     return obj != NULL && is_subclass(obj->klass());
   }
   // Debugging
   friend class JavaClasses;
   friend class ClassFileParser; // access to number_of_fake_fields
 };
 // 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,
    hc_static_security_offset = 3
   };
   static int  static_in_offset;
   static int static_out_offset;
   static int static_err_offset;
   static int static_security_offset;
  public:
   static int  in_offset_in_bytes();
   static int out_offset_in_bytes();
   static int err_offset_in_bytes();
   static bool has_security_manager();
   // 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(Handle mirror, int method, int version, int bci, TRAPS);
   static oop create(methodHandle method, 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 java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
  private:
   static int  _owner_offset;
  public:
   static void initialize(TRAPS);
   static oop  get_owner_threadObj(oop obj);
 };
 // Use to declare fields that need to be injected into Java classes
 // for the JVM to use.  The name_index and signature_index are
 // declared in vmSymbols.  The may_be_java flag is used to declare
 // fields that might already exist in Java but should be injected if
 // they don't.  Otherwise the field is unconditionally injected and
 // the JVM uses the injected one.  This is to ensure that name
 // collisions don't occur.  In general may_be_java should be false
 // unless there's a good reason.
 class InjectedField {
  public:
   const SystemDictionary::WKID klass_id;
   const vmSymbols::SID name_index;
   const vmSymbols::SID signature_index;
   const bool           may_be_java;
   Klass* klass() const    { return SystemDictionary::well_known_klass(klass_id); }
   Symbol* name() const      { return lookup_symbol(name_index); }
   Symbol* signature() const { return lookup_symbol(signature_index); }
   int compute_offset();
   // Find the Symbol for this index
   static Symbol* lookup_symbol(int symbol_index) {
     return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
   }
 };
 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
   klass##_##name##_enum,
 #define ALL_INJECTED_FIELDS(macro)          \
   CLASS_INJECTED_FIELDS(macro)              \
   CLASSLOADER_INJECTED_FIELDS(macro)        \
   MEMBERNAME_INJECTED_FIELDS(macro)
 // Interface to hard-coded offset checking
 class JavaClasses : AllStatic {
  private:
   static InjectedField _injected_fields[];
   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:
   enum InjectedFieldID {
     ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
     MAX_enum
   };
   static int compute_injected_offset(InjectedFieldID id);
   static void compute_hard_coded_offsets();
   static void compute_offsets();
   static void check_offsets() PRODUCT_RETURN;
   static InjectedField* get_injected(Symbol* class_name, int* field_count);
 };
 #undef DECLARE_INJECTED_FIELD_ENUM
 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/classfile/javaClasses.hpp@595c0f60d50d (annotated)

src/share/vm/classfile/javaClasses.hpp