jdk8-mips64-public/hotspot: src/share/vm/classfile/javaClasses.cpp@60b728ec77c1 (annotated)

src/share/vm/classfile/javaClasses.cpp@60b728ec77c1 (annotated)

src/share/vm/classfile/javaClasses.cpp

Tue, 29 Apr 2008 19:45:22 -0700

author: jrose
date: Tue, 29 Apr 2008 19:45:22 -0700
changeset 567: 60b728ec77c1
parent 548: ba764ed4b6f2
child 600: 437d03ea40b1
permissions: -rw-r--r--

6652736: well known classes in system dictionary are inefficiently processed
Summary: combine many scalar variables into a single enum-indexed array in SystemDictionary.
Reviewed-by: kvn

 /*
  * Copyright 1997-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 # include "incls/_precompiled.incl"
 # include "incls/_javaClasses.cpp.incl"
 // Helpful routine for computing field offsets at run time rather than hardcoding them
 static void
 compute_offset(int &dest_offset,
                klassOop klass_oop, symbolOop name_symbol, symbolOop signature_symbol) {
   fieldDescriptor fd;
   instanceKlass* ik = instanceKlass::cast(klass_oop);
   if (!ik->find_local_field(name_symbol, signature_symbol, &fd)) {
     ResourceMark rm;
     tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
     fatal("Invalid layout of preloaded class");
   }
   dest_offset = fd.offset();
 }
 // Same as above but for "optional" offsets that might not be present in certain JDK versions
 static void
 compute_optional_offset(int& dest_offset,
                         klassOop klass_oop, symbolOop name_symbol, symbolOop signature_symbol) {
   fieldDescriptor fd;
   instanceKlass* ik = instanceKlass::cast(klass_oop);
   if (ik->find_local_field(name_symbol, signature_symbol, &fd)) {
     dest_offset = fd.offset();
   }
 }
 Handle java_lang_String::basic_create(int length, bool tenured, TRAPS) {
   // Create the String object first, so there's a chance that the String
   // and the char array it points to end up in the same cache line.
   oop obj;
   if (tenured) {
     obj = instanceKlass::cast(SystemDictionary::string_klass())->allocate_permanent_instance(CHECK_NH);
   } else {
     obj = instanceKlass::cast(SystemDictionary::string_klass())->allocate_instance(CHECK_NH);
   }
   // Create the char array.  The String object must be handlized here
   // because GC can happen as a result of the allocation attempt.
   Handle h_obj(THREAD, obj);
   typeArrayOop buffer;
   if (tenured) {
     buffer = oopFactory::new_permanent_charArray(length, CHECK_NH);
   } else {
     buffer = oopFactory::new_charArray(length, CHECK_NH);
   }
   // Point the String at the char array
   obj = h_obj();
   set_value(obj, buffer);
   // No need to zero the offset, allocation zero'ed the entire String object
   assert(offset(obj) == 0, "initial String offset should be zero");
 //set_offset(obj, 0);
   set_count(obj, length);
   return h_obj;
 }
 Handle java_lang_String::basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS) {
   Handle h_obj = basic_create(length, tenured, CHECK_NH);
   typeArrayOop buffer = value(h_obj());
   for (int index = 0; index < length; index++) {
     buffer->char_at_put(index, unicode[index]);
   }
   return h_obj;
 }
 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
   return basic_create_from_unicode(unicode, length, false, CHECK_NH);
 }
 Handle java_lang_String::create_tenured_from_unicode(jchar* unicode, int length, TRAPS) {
   return basic_create_from_unicode(unicode, length, true, CHECK_NH);
 }
 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
   Handle h_obj = basic_create_from_unicode(unicode, length, false, CHECK_0);
   return h_obj();
 }
 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
   if (utf8_str == NULL) {
     return Handle();
   }
   int length = UTF8::unicode_length(utf8_str);
   Handle h_obj = basic_create(length, false, CHECK_NH);
   if (length > 0) {
     UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
   }
   return h_obj;
 }
 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
   Handle h_obj = create_from_str(utf8_str, CHECK_0);
   return h_obj();
 }
 Handle java_lang_String::create_from_symbol(symbolHandle symbol, TRAPS) {
   int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
   Handle h_obj = basic_create(length, false, CHECK_NH);
   if (length > 0) {
     UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
   }
   return h_obj;
 }
 // Converts a C string to a Java String based on current encoding
 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
   assert(str != NULL, "bad arguments");
   typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
   static to_java_string_fn_t _to_java_string_fn = NULL;
   if (_to_java_string_fn == NULL) {
     void *lib_handle = os::native_java_library();
     _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, hpi::dll_lookup(lib_handle, "NewStringPlatform"));
     if (_to_java_string_fn == NULL) {
       fatal("NewStringPlatform missing");
     }
   }
   jstring js = NULL;
   { JavaThread* thread = (JavaThread*)THREAD;
     assert(thread->is_Java_thread(), "must be java thread");
     HandleMark hm(thread);
     ThreadToNativeFromVM ttn(thread);
     js = (_to_java_string_fn)(thread->jni_environment(), str);
   }
   return Handle(THREAD, JNIHandles::resolve(js));
 }
 // Converts a Java String to a native C string that can be used for
 // native OS calls.
 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
   typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
   static to_platform_string_fn_t _to_platform_string_fn = NULL;
   if (_to_platform_string_fn == NULL) {
     void *lib_handle = os::native_java_library();
     _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, hpi::dll_lookup(lib_handle, "GetStringPlatformChars"));
     if (_to_platform_string_fn == NULL) {
       fatal("GetStringPlatformChars missing");
     }
   }
   char *native_platform_string;
   { JavaThread* thread = (JavaThread*)THREAD;
     assert(thread->is_Java_thread(), "must be java thread");
     JNIEnv *env = thread->jni_environment();
     jstring js = (jstring) JNIHandles::make_local(env, java_string());
     bool is_copy;
     HandleMark hm(thread);
     ThreadToNativeFromVM ttn(thread);
     native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
     assert(is_copy == JNI_TRUE, "is_copy value changed");
     JNIHandles::destroy_local(js);
   }
   return native_platform_string;
 }
 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
   oop          obj    = java_string();
   // Typical usage is to convert all '/' to '.' in string.
   typeArrayOop value  = java_lang_String::value(obj);
   int          offset = java_lang_String::offset(obj);
   int          length = java_lang_String::length(obj);
   // First check if any from_char exist
   int index; // Declared outside, used later
   for (index = 0; index < length; index++) {
     if (value->char_at(index + offset) == from_char) {
       break;
     }
   }
   if (index == length) {
     // No from_char, so do not copy.
     return java_string;
   }
   // Create new UNICODE buffer. Must handlize value because GC
   // may happen during String and char array creation.
   typeArrayHandle h_value(THREAD, value);
   Handle string = basic_create(length, false, CHECK_NH);
   typeArrayOop from_buffer = h_value();
   typeArrayOop to_buffer   = java_lang_String::value(string());
   // Copy contents
   for (index = 0; index < length; index++) {
     jchar c = from_buffer->char_at(index + offset);
     if (c == from_char) {
       c = to_char;
     }
     to_buffer->char_at_put(index, c);
   }
   return string;
 }
 jchar* java_lang_String::as_unicode_string(oop java_string, int& length) {
   typeArrayOop value  = java_lang_String::value(java_string);
   int          offset = java_lang_String::offset(java_string);
                length = java_lang_String::length(java_string);
   jchar* result = NEW_RESOURCE_ARRAY(jchar, length);
   for (int index = 0; index < length; index++) {
     result[index] = value->char_at(index + offset);
   }
   return result;
 }
 symbolHandle java_lang_String::as_symbol(Handle java_string, TRAPS) {
   oop          obj    = java_string();
   typeArrayOop value  = java_lang_String::value(obj);
   int          offset = java_lang_String::offset(obj);
   int          length = java_lang_String::length(obj);
   ResourceMark rm(THREAD);
   symbolHandle result;
   if (length > 0) {
     int utf8_length = UNICODE::utf8_length(value->char_at_addr(offset), length);
     char* chars = NEW_RESOURCE_ARRAY(char, utf8_length + 1);
     UNICODE::convert_to_utf8(value->char_at_addr(offset), length, chars);
     // Allocate the symbol
     result = oopFactory::new_symbol_handle(chars, utf8_length, CHECK_(symbolHandle()));
   } else {
     result = oopFactory::new_symbol_handle("", 0, CHECK_(symbolHandle()));
   }
   return result;
 }
 int java_lang_String::utf8_length(oop java_string) {
   typeArrayOop value  = java_lang_String::value(java_string);
   int          offset = java_lang_String::offset(java_string);
   int          length = java_lang_String::length(java_string);
   jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
   return UNICODE::utf8_length(position, length);
 }
 char* java_lang_String::as_utf8_string(oop java_string) {
   typeArrayOop value  = java_lang_String::value(java_string);
   int          offset = java_lang_String::offset(java_string);
   int          length = java_lang_String::length(java_string);
   jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
   return UNICODE::as_utf8(position, length);
 }
 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
   typeArrayOop value  = java_lang_String::value(java_string);
   int          offset = java_lang_String::offset(java_string);
   int          length = java_lang_String::length(java_string);
   assert(start + len <= length, "just checking");
   jchar* position = value->char_at_addr(offset + start);
   return UNICODE::as_utf8(position, len);
 }
 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
   assert(SharedSkipVerify ||
          java_string->klass() == SystemDictionary::string_klass(),
          "must be java_string");
   typeArrayOop value  = java_lang_String::value(java_string);
   int          offset = java_lang_String::offset(java_string);
   int          length = java_lang_String::length(java_string);
   if (length != len) {
     return false;
   }
   for (int i = 0; i < len; i++) {
     if (value->char_at(i + offset) != chars[i]) {
       return false;
     }
   }
   return true;
 }
 void java_lang_String::print(Handle java_string, outputStream* st) {
   oop          obj    = java_string();
   assert(obj->klass() == SystemDictionary::string_klass(), "must be java_string");
   typeArrayOop value  = java_lang_String::value(obj);
   int          offset = java_lang_String::offset(obj);
   int          length = java_lang_String::length(obj);
   int end = MIN2(length, 100);
   if (value == NULL) {
     // This can happen if, e.g., printing a String
     // object before its initializer has been called
     st->print_cr("NULL");
   } else {
     st->print("\"");
     for (int index = 0; index < length; index++) {
       st->print("%c", value->char_at(index + offset));
     }
     st->print("\"");
   }
 }
 oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) {
   assert(k->java_mirror() == NULL, "should only assign mirror once");
   // Use this moment of initialization to cache modifier_flags also,
   // to support Class.getModifiers().  Instance classes recalculate
   // the cached flags after the class file is parsed, but before the
   // class is put into the system dictionary.
   int computed_modifiers = k->compute_modifier_flags(CHECK_0);
   k->set_modifier_flags(computed_modifiers);
   if (SystemDictionary::class_klass_loaded()) {
     // Allocate mirror (java.lang.Class instance)
     Handle mirror = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0);
     // Setup indirections
     mirror->obj_field_put(klass_offset,  k());
     k->set_java_mirror(mirror());
     // It might also have a component mirror.  This mirror must already exist.
     if (k->oop_is_javaArray()) {
       Handle comp_mirror;
       if (k->oop_is_typeArray()) {
         BasicType type = typeArrayKlass::cast(k->as_klassOop())->element_type();
         comp_mirror = Universe::java_mirror(type);
         assert(comp_mirror.not_null(), "must have primitive mirror");
       } else if (k->oop_is_objArray()) {
         klassOop element_klass = objArrayKlass::cast(k->as_klassOop())->element_klass();
         if (element_klass != NULL
             && (Klass::cast(element_klass)->oop_is_instance() ||
                 Klass::cast(element_klass)->oop_is_javaArray())) {
           comp_mirror = Klass::cast(element_klass)->java_mirror();
           assert(comp_mirror.not_null(), "must have element mirror");
         }
         // else some object array internal to the VM, like systemObjArrayKlassObj
       }
       if (comp_mirror.not_null()) {
         // Two-way link between the array klass and its component mirror:
         arrayKlass::cast(k->as_klassOop())->set_component_mirror(comp_mirror());
         set_array_klass(comp_mirror(), k->as_klassOop());
       }
     }
     return mirror();
   } else {
     return NULL;
   }
 }
 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
   // This should be improved by adding a field at the Java level or by
   // introducing a new VM klass (see comment in ClassFileParser)
   oop java_class = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0);
   if (type != T_VOID) {
     klassOop aklass = Universe::typeArrayKlassObj(type);
     assert(aklass != NULL, "correct bootstrap");
     set_array_klass(java_class, aklass);
   }
   return java_class;
 }
 klassOop java_lang_Class::as_klassOop(oop java_class) {
   //%note memory_2
   klassOop k = klassOop(java_class->obj_field(klass_offset));
   assert(k == NULL || k->is_klass(), "type check");
   return k;
 }
 klassOop java_lang_Class::array_klass(oop java_class) {
   klassOop k = klassOop(java_class->obj_field(array_klass_offset));
   assert(k == NULL || k->is_klass() && Klass::cast(k)->oop_is_javaArray(), "should be array klass");
   return k;
 }
 void java_lang_Class::set_array_klass(oop java_class, klassOop klass) {
   assert(klass->is_klass() && Klass::cast(klass)->oop_is_javaArray(), "should be array klass");
   java_class->obj_field_put(array_klass_offset, klass);
 }
 methodOop java_lang_Class::resolved_constructor(oop java_class) {
   oop constructor = java_class->obj_field(resolved_constructor_offset);
   assert(constructor == NULL || constructor->is_method(), "should be method");
   return methodOop(constructor);
 }
 void java_lang_Class::set_resolved_constructor(oop java_class, methodOop constructor) {
   assert(constructor->is_method(), "should be method");
   java_class->obj_field_put(resolved_constructor_offset, constructor);
 }
 bool java_lang_Class::is_primitive(oop java_class) {
   klassOop k = klassOop(java_class->obj_field(klass_offset));
   return k == NULL;
 }
 BasicType java_lang_Class::primitive_type(oop java_class) {
   assert(java_lang_Class::is_primitive(java_class), "just checking");
   klassOop ak = klassOop(java_class->obj_field(array_klass_offset));
   BasicType type = T_VOID;
   if (ak != NULL) {
     // Note: create_basic_type_mirror above initializes ak to a non-null value.
     type = arrayKlass::cast(ak)->element_type();
   } else {
     assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
   }
   assert(Universe::java_mirror(type) == java_class, "must be consistent");
   return type;
 }
 oop java_lang_Class::primitive_mirror(BasicType t) {
   oop mirror = Universe::java_mirror(t);
   assert(mirror != NULL && mirror->is_a(SystemDictionary::class_klass()), "must be a Class");
   assert(java_lang_Class::is_primitive(mirror), "must be primitive");
   return mirror;
 }
 bool java_lang_Class::offsets_computed = false;
 int  java_lang_Class::classRedefinedCount_offset = -1;
 void java_lang_Class::compute_offsets() {
   assert(!offsets_computed, "offsets should be initialized only once");
   offsets_computed = true;
   klassOop k = SystemDictionary::class_klass();
   // The classRedefinedCount field is only present starting in 1.5,
   // so don't go fatal.
   compute_optional_offset(classRedefinedCount_offset,
     k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
 }
 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
   if (!JDK_Version::is_gte_jdk15x_version()
       || classRedefinedCount_offset == -1) {
     // The classRedefinedCount field is only present starting in 1.5.
     // If we don't have an offset for it then just return -1 as a marker.
     return -1;
   }
   return the_class_mirror->int_field(classRedefinedCount_offset);
 }
 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
   if (!JDK_Version::is_gte_jdk15x_version()
       || classRedefinedCount_offset == -1) {
     // The classRedefinedCount field is only present starting in 1.5.
     // If we don't have an offset for it then nothing to set.
     return;
   }
   the_class_mirror->int_field_put(classRedefinedCount_offset, value);
 }
 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
 //       platform thread structure, and a eetop offset which was used for thread
 //       local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
 //       merged, so in the HotSpot VM we just use the eetop field for the thread
 //       instead of the privateInfo_offset.
 //
 // Note: The stackSize field is only present starting in 1.4.
 int java_lang_Thread::_name_offset = 0;
 int java_lang_Thread::_group_offset = 0;
 int java_lang_Thread::_contextClassLoader_offset = 0;
 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
 int java_lang_Thread::_priority_offset = 0;
 int java_lang_Thread::_eetop_offset = 0;
 int java_lang_Thread::_daemon_offset = 0;
 int java_lang_Thread::_stillborn_offset = 0;
 int java_lang_Thread::_stackSize_offset = 0;
 int java_lang_Thread::_tid_offset = 0;
 int java_lang_Thread::_thread_status_offset = 0;
 int java_lang_Thread::_park_blocker_offset = 0;
 int java_lang_Thread::_park_event_offset = 0 ;
 void java_lang_Thread::compute_offsets() {
   assert(_group_offset == 0, "offsets should be initialized only once");
   klassOop k = SystemDictionary::thread_klass();
   compute_offset(_name_offset,      k, vmSymbols::name_name(),      vmSymbols::char_array_signature());
   compute_offset(_group_offset,     k, vmSymbols::group_name(),     vmSymbols::threadgroup_signature());
   compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
   compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
   compute_offset(_priority_offset,  k, vmSymbols::priority_name(),  vmSymbols::int_signature());
   compute_offset(_daemon_offset,    k, vmSymbols::daemon_name(),    vmSymbols::bool_signature());
   compute_offset(_eetop_offset,     k, vmSymbols::eetop_name(),     vmSymbols::long_signature());
   compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
   // The stackSize field is only present starting in 1.4, so don't go fatal.
   compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
   // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
   compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
   compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
   // The parkBlocker field is only present starting in 1.6, so don't go fatal.
   compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
   compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
  vmSymbols::long_signature());
 }
 JavaThread* java_lang_Thread::thread(oop java_thread) {
   return (JavaThread*)java_thread->address_field(_eetop_offset);
 }
 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
   java_thread->address_field_put(_eetop_offset, (address)thread);
 }
 typeArrayOop java_lang_Thread::name(oop java_thread) {
   oop name = java_thread->obj_field(_name_offset);
   assert(name == NULL || (name->is_typeArray() && typeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
   return typeArrayOop(name);
 }
 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
   assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
   java_thread->obj_field_put(_name_offset, name);
 }
 ThreadPriority java_lang_Thread::priority(oop java_thread) {
   return (ThreadPriority)java_thread->int_field(_priority_offset);
 }
 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
   java_thread->int_field_put(_priority_offset, priority);
 }
 oop java_lang_Thread::threadGroup(oop java_thread) {
   return java_thread->obj_field(_group_offset);
 }
 bool java_lang_Thread::is_stillborn(oop java_thread) {
   return java_thread->bool_field(_stillborn_offset) != 0;
 }
 // We never have reason to turn the stillborn bit off
 void java_lang_Thread::set_stillborn(oop java_thread) {
   java_thread->bool_field_put(_stillborn_offset, true);
 }
 bool java_lang_Thread::is_alive(oop java_thread) {
   JavaThread* thr = java_lang_Thread::thread(java_thread);
   return (thr != NULL);
 }
 bool java_lang_Thread::is_daemon(oop java_thread) {
   return java_thread->bool_field(_daemon_offset) != 0;
 }
 void java_lang_Thread::set_daemon(oop java_thread) {
   java_thread->bool_field_put(_daemon_offset, true);
 }
 oop java_lang_Thread::context_class_loader(oop java_thread) {
   return java_thread->obj_field(_contextClassLoader_offset);
 }
 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
   return java_thread->obj_field(_inheritedAccessControlContext_offset);
 }
 jlong java_lang_Thread::stackSize(oop java_thread) {
   // The stackSize field is only present starting in 1.4
   if (_stackSize_offset > 0) {
     assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
     return java_thread->long_field(_stackSize_offset);
   } else {
     return 0;
   }
 }
 // Write the thread status value to threadStatus field in java.lang.Thread java class.
 void java_lang_Thread::set_thread_status(oop java_thread,
                                          java_lang_Thread::ThreadStatus status) {
   assert(JavaThread::current()->thread_state() == _thread_in_vm, "Java Thread is not running in vm");
   // The threadStatus is only present starting in 1.5
   if (_thread_status_offset > 0) {
     java_thread->int_field_put(_thread_status_offset, status);
   }
 }
 // Read thread status value from threadStatus field in java.lang.Thread java class.
 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
   assert(Thread::current()->is_VM_thread() ||
          JavaThread::current()->thread_state() == _thread_in_vm,
          "Java Thread is not running in vm");
   // The threadStatus is only present starting in 1.5
   if (_thread_status_offset > 0) {
     return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
   } else {
     // All we can easily figure out is if it is alive, but that is
     // enough info for a valid unknown status.
     // These aren't restricted to valid set ThreadStatus values, so
     // use JVMTI values and cast.
     JavaThread* thr = java_lang_Thread::thread(java_thread);
     if (thr == NULL) {
       // the thread hasn't run yet or is in the process of exiting
       return NEW;
     }
     return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
   }
 }
 jlong java_lang_Thread::thread_id(oop java_thread) {
   // The thread ID field is only present starting in 1.5
   if (_tid_offset > 0) {
     return java_thread->long_field(_tid_offset);
   } else {
     return 0;
   }
 }
 oop java_lang_Thread::park_blocker(oop java_thread) {
   assert(JDK_Version::supports_thread_park_blocker() && _park_blocker_offset != 0,
          "Must support parkBlocker field");
   if (_park_blocker_offset > 0) {
     return java_thread->obj_field(_park_blocker_offset);
   }
   return NULL;
 }
 jlong java_lang_Thread::park_event(oop java_thread) {
   if (_park_event_offset > 0) {
     return java_thread->long_field(_park_event_offset);
   }
   return 0;
 }
 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
   if (_park_event_offset > 0) {
     java_thread->long_field_put(_park_event_offset, ptr);
     return true;
   }
   return false;
 }
 const char* java_lang_Thread::thread_status_name(oop java_thread) {
   assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
   ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
   switch (status) {
     case NEW                      : return "NEW";
     case RUNNABLE                 : return "RUNNABLE";
     case SLEEPING                 : return "TIMED_WAITING (sleeping)";
     case IN_OBJECT_WAIT           : return "WAITING (on object monitor)";
     case IN_OBJECT_WAIT_TIMED     : return "TIMED_WAITING (on object monitor)";
     case PARKED                   : return "WAITING (parking)";
     case PARKED_TIMED             : return "TIMED_WAITING (parking)";
     case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
     case TERMINATED               : return "TERMINATED";
     default                       : return "UNKNOWN";
   };
 }
 int java_lang_ThreadGroup::_parent_offset = 0;
 int java_lang_ThreadGroup::_name_offset = 0;
 int java_lang_ThreadGroup::_threads_offset = 0;
 int java_lang_ThreadGroup::_groups_offset = 0;
 int java_lang_ThreadGroup::_maxPriority_offset = 0;
 int java_lang_ThreadGroup::_destroyed_offset = 0;
 int java_lang_ThreadGroup::_daemon_offset = 0;
 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
 int java_lang_ThreadGroup::_nthreads_offset = 0;
 int java_lang_ThreadGroup::_ngroups_offset = 0;
 oop  java_lang_ThreadGroup::parent(oop java_thread_group) {
   assert(java_thread_group->is_oop(), "thread group must be oop");
   return java_thread_group->obj_field(_parent_offset);
 }
 // ("name as oop" accessor is not necessary)
 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
   oop name = java_thread_group->obj_field(_name_offset);
   // ThreadGroup.name can be null
   return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
 }
 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
   assert(java_thread_group->is_oop(), "thread group must be oop");
   return java_thread_group->int_field(_nthreads_offset);
 }
 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
   oop threads = java_thread_group->obj_field(_threads_offset);
   assert(threads != NULL, "threadgroups should have threads");
   assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
   return objArrayOop(threads);
 }
 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
   assert(java_thread_group->is_oop(), "thread group must be oop");
   return java_thread_group->int_field(_ngroups_offset);
 }
 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
   oop groups = java_thread_group->obj_field(_groups_offset);
   assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
   return objArrayOop(groups);
 }
 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
   assert(java_thread_group->is_oop(), "thread group must be oop");
   return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
 }
 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
   assert(java_thread_group->is_oop(), "thread group must be oop");
   return java_thread_group->bool_field(_destroyed_offset) != 0;
 }
 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
   assert(java_thread_group->is_oop(), "thread group must be oop");
   return java_thread_group->bool_field(_daemon_offset) != 0;
 }
 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
   assert(java_thread_group->is_oop(), "thread group must be oop");
   return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
 }
 void java_lang_ThreadGroup::compute_offsets() {
   assert(_parent_offset == 0, "offsets should be initialized only once");
   klassOop k = SystemDictionary::threadGroup_klass();
   compute_offset(_parent_offset,      k, vmSymbols::parent_name(),      vmSymbols::threadgroup_signature());
   compute_offset(_name_offset,        k, vmSymbols::name_name(),        vmSymbols::string_signature());
   compute_offset(_threads_offset,     k, vmSymbols::threads_name(),     vmSymbols::thread_array_signature());
   compute_offset(_groups_offset,      k, vmSymbols::groups_name(),      vmSymbols::threadgroup_array_signature());
   compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
   compute_offset(_destroyed_offset,   k, vmSymbols::destroyed_name(),   vmSymbols::bool_signature());
   compute_offset(_daemon_offset,      k, vmSymbols::daemon_name(),      vmSymbols::bool_signature());
   compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
   compute_offset(_nthreads_offset,    k, vmSymbols::nthreads_name(),    vmSymbols::int_signature());
   compute_offset(_ngroups_offset,     k, vmSymbols::ngroups_name(),     vmSymbols::int_signature());
 }
 oop java_lang_Throwable::backtrace(oop throwable) {
   return throwable->obj_field_acquire(backtrace_offset);
 }
 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
   throwable->release_obj_field_put(backtrace_offset, value);
 }
 oop java_lang_Throwable::message(oop throwable) {
   return throwable->obj_field(detailMessage_offset);
 }
 oop java_lang_Throwable::message(Handle throwable) {
   return throwable->obj_field(detailMessage_offset);
 }
 void java_lang_Throwable::set_message(oop throwable, oop value) {
   throwable->obj_field_put(detailMessage_offset, value);
 }
 void java_lang_Throwable::clear_stacktrace(oop throwable) {
   assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
   throwable->obj_field_put(stackTrace_offset, NULL);
 }
 void java_lang_Throwable::print(oop throwable, outputStream* st) {
   ResourceMark rm;
   klassOop k = throwable->klass();
   assert(k != NULL, "just checking");
   st->print("%s", instanceKlass::cast(k)->external_name());
   oop msg = message(throwable);
   if (msg != NULL) {
     st->print(": %s", java_lang_String::as_utf8_string(msg));
   }
 }
 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
   ResourceMark rm;
   klassOop k = throwable->klass();
   assert(k != NULL, "just checking");
   st->print("%s", instanceKlass::cast(k)->external_name());
   oop msg = message(throwable);
   if (msg != NULL) {
     st->print(": %s", java_lang_String::as_utf8_string(msg));
   }
 }
 // Print stack trace element to resource allocated buffer
 char* java_lang_Throwable::print_stack_element_to_buffer(methodOop method, int bci) {
   // Get strings and string lengths
   instanceKlass* klass = instanceKlass::cast(method->method_holder());
   const char* klass_name  = klass->external_name();
   int buf_len = (int)strlen(klass_name);
   char* source_file_name;
   if (klass->source_file_name() == NULL) {
     source_file_name = NULL;
   } else {
     source_file_name = klass->source_file_name()->as_C_string();
     buf_len += (int)strlen(source_file_name);
   }
   char* method_name = method->name()->as_C_string();
   buf_len += (int)strlen(method_name);
   // Allocate temporary buffer with extra space for formatting and line number
   char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
   // Print stack trace line in buffer
   sprintf(buf, "\tat %s.%s", klass_name, method_name);
   if (method->is_native()) {
     strcat(buf, "(Native Method)");
   } else {
     int line_number = method->line_number_from_bci(bci);
     if (source_file_name != NULL && (line_number != -1)) {
       // Sourcename and linenumber
       sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
     } else if (source_file_name != NULL) {
       // Just sourcename
       sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
     } else {
       // Neither soucename and linenumber
       sprintf(buf + (int)strlen(buf), "(Unknown Source)");
     }
     nmethod* nm = method->code();
     if (WizardMode && nm != NULL) {
       sprintf(buf + (int)strlen(buf), "(nmethod %#x)", nm);
     }
   }
   return buf;
 }
 void java_lang_Throwable::print_stack_element(Handle stream, methodOop method, int bci) {
   ResourceMark rm;
   char* buf = print_stack_element_to_buffer(method, bci);
   print_to_stream(stream, buf);
 }
 void java_lang_Throwable::print_stack_element(outputStream *st, methodOop method, int bci) {
   ResourceMark rm;
   char* buf = print_stack_element_to_buffer(method, bci);
   st->print_cr("%s", buf);
 }
 void java_lang_Throwable::print_to_stream(Handle stream, const char* str) {
   if (stream.is_null()) {
     tty->print_cr("%s", str);
   } else {
     EXCEPTION_MARK;
     JavaValue result(T_VOID);
     Handle arg (THREAD, oopFactory::new_charArray(str, THREAD));
     if (!HAS_PENDING_EXCEPTION) {
       JavaCalls::call_virtual(&result,
                               stream,
                               KlassHandle(THREAD, stream->klass()),
                               vmSymbolHandles::println_name(),
                               vmSymbolHandles::char_array_void_signature(),
                               arg,
                               THREAD);
     }
     // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
     if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION;
   }
 }
 const char* java_lang_Throwable::no_stack_trace_message() {
   return "\t<<no stack trace available>>";
 }
 // Currently used only for exceptions occurring during startup
 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
   Thread *THREAD = Thread::current();
   Handle h_throwable(THREAD, throwable);
   while (h_throwable.not_null()) {
     objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
     if (result.is_null()) {
       st->print_cr(no_stack_trace_message());
       return;
     }
     while (result.not_null()) {
       objArrayHandle methods (THREAD,
                               objArrayOop(result->obj_at(trace_methods_offset)));
       typeArrayHandle bcis (THREAD,
                             typeArrayOop(result->obj_at(trace_bcis_offset)));
       if (methods.is_null() || bcis.is_null()) {
         st->print_cr(no_stack_trace_message());
         return;
       }
       int length = methods()->length();
       for (int index = 0; index < length; index++) {
         methodOop method = methodOop(methods()->obj_at(index));
         if (method == NULL) goto handle_cause;
         int bci = bcis->ushort_at(index);
         print_stack_element(st, method, bci);
       }
       result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
     }
   handle_cause:
     {
       EXCEPTION_MARK;
       JavaValue result(T_OBJECT);
       JavaCalls::call_virtual(&result,
                               h_throwable,
                               KlassHandle(THREAD, h_throwable->klass()),
                               vmSymbolHandles::getCause_name(),
                               vmSymbolHandles::void_throwable_signature(),
                               THREAD);
       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
       if (HAS_PENDING_EXCEPTION) {
         CLEAR_PENDING_EXCEPTION;
         h_throwable = Handle();
       } else {
         h_throwable = Handle(THREAD, (oop) result.get_jobject());
         if (h_throwable.not_null()) {
           st->print("Caused by: ");
           print(h_throwable, st);
           st->cr();
         }
       }
     }
   }
 }
 void java_lang_Throwable::print_stack_trace(oop throwable, oop print_stream) {
   // Note: this is no longer used in Merlin, but we support it for compatibility.
   Thread *thread = Thread::current();
   Handle stream(thread, print_stream);
   objArrayHandle result (thread, objArrayOop(backtrace(throwable)));
   if (result.is_null()) {
     print_to_stream(stream, no_stack_trace_message());
     return;
   }
   while (result.not_null()) {
     objArrayHandle methods (thread,
                             objArrayOop(result->obj_at(trace_methods_offset)));
     typeArrayHandle bcis (thread,
                           typeArrayOop(result->obj_at(trace_bcis_offset)));
     if (methods.is_null() || bcis.is_null()) {
       print_to_stream(stream, no_stack_trace_message());
       return;
     }
     int length = methods()->length();
     for (int index = 0; index < length; index++) {
       methodOop method = methodOop(methods()->obj_at(index));
       if (method == NULL) return;
       int bci = bcis->ushort_at(index);
       print_stack_element(stream, method, bci);
     }
     result = objArrayHandle(thread, objArrayOop(result->obj_at(trace_next_offset)));
   }
 }
 // This class provides a simple wrapper over the internal structure of
 // exception backtrace to insulate users of the backtrace from needing
 // to know what it looks like.
 class BacktraceBuilder: public StackObj {
  private:
   Handle          _backtrace;
   objArrayOop     _head;
   objArrayOop     _methods;
   typeArrayOop    _bcis;
   int             _index;
   bool            _dirty;
   No_Safepoint_Verifier _nsv;
  public:
   enum {
     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
     trace_bcis_offset    = java_lang_Throwable::trace_bcis_offset,
     trace_next_offset    = java_lang_Throwable::trace_next_offset,
     trace_size           = java_lang_Throwable::trace_size,
     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
   };
   // constructor for new backtrace
   BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _dirty(false) {
     expand(CHECK);
     _backtrace = _head;
     _index = 0;
   }
   void flush() {
     if (_dirty && _methods != NULL) {
       BarrierSet* bs = Universe::heap()->barrier_set();
       assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
       bs->write_ref_array(MemRegion((HeapWord*)_methods->base(),
                                     _methods->array_size()));
       _dirty = false;
     }
   }
   void expand(TRAPS) {
     flush();
     objArrayHandle old_head(THREAD, _head);
     Pause_No_Safepoint_Verifier pnsv(&_nsv);
     objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
     objArrayHandle new_head(THREAD, head);
     objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK);
     objArrayHandle new_methods(THREAD, methods);
     typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK);
     typeArrayHandle new_bcis(THREAD, bcis);
     if (!old_head.is_null()) {
       old_head->obj_at_put(trace_next_offset, new_head());
     }
     new_head->obj_at_put(trace_methods_offset, new_methods());
     new_head->obj_at_put(trace_bcis_offset, new_bcis());
     _head    = new_head();
     _methods = new_methods();
     _bcis    = new_bcis();
     _index = 0;
   }
   oop backtrace() {
     flush();
     return _backtrace();
   }
   inline void push(methodOop method, short bci, TRAPS) {
     if (_index >= trace_chunk_size) {
       methodHandle mhandle(THREAD, method);
       expand(CHECK);
       method = mhandle();
     }
      _methods->obj_at_put(_index, method);
     // bad for UseCompressedOops
     // *_methods->obj_at_addr(_index) = method;
     _bcis->ushort_at_put(_index, bci);
     _index++;
     _dirty = true;
   }
   methodOop current_method() {
     assert(_index >= 0 && _index < trace_chunk_size, "out of range");
     return methodOop(_methods->obj_at(_index));
   }
   jushort current_bci() {
     assert(_index >= 0 && _index < trace_chunk_size, "out of range");
     return _bcis->ushort_at(_index);
   }
 };
 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, TRAPS) {
   if (!StackTraceInThrowable) return;
   ResourceMark rm(THREAD);
   // Start out by clearing the backtrace for this object, in case the VM
   // runs out of memory while allocating the stack trace
   set_backtrace(throwable(), NULL);
   if (JDK_Version::is_gte_jdk14x_version()) {
     // New since 1.4, clear lazily constructed Java level stacktrace if
     // refilling occurs
     clear_stacktrace(throwable());
   }
   int max_depth = MaxJavaStackTraceDepth;
   JavaThread* thread = (JavaThread*)THREAD;
   BacktraceBuilder bt(CHECK);
   // Instead of using vframe directly, this version of fill_in_stack_trace
   // basically handles everything by hand. This significantly improved the
   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
   // See bug 6333838 for  more details.
   // The "ASSERT" here is to verify this method generates the exactly same stack
   // trace as utilizing vframe.
 #ifdef ASSERT
   vframeStream st(thread);
   methodHandle st_method(THREAD, st.method());
 #endif
   int total_count = 0;
   RegisterMap map(thread, false);
   int decode_offset = 0;
   nmethod* nm = NULL;
   bool skip_fillInStackTrace_check = false;
   bool skip_throwableInit_check = false;
   for (frame fr = thread->last_frame(); max_depth != total_count;) {
     methodOop method = NULL;
     int bci = 0;
     // Compiled java method case.
     if (decode_offset != 0) {
       DebugInfoReadStream stream(nm, decode_offset);
       decode_offset = stream.read_int();
       method = (methodOop)nm->oop_at(stream.read_int());
       bci = stream.read_bci();
     } else {
       if (fr.is_first_frame()) break;
       address pc = fr.pc();
       if (fr.is_interpreted_frame()) {
         intptr_t bcx = fr.interpreter_frame_bcx();
         method = fr.interpreter_frame_method();
         bci =  fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
         fr = fr.sender(&map);
       } else {
         CodeBlob* cb = fr.cb();
         // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
         // but non nmethod
         fr = fr.sender(&map);
         if (cb == NULL || !cb->is_nmethod()) {
           continue;
         }
         nm = (nmethod*)cb;
         if (nm->method()->is_native()) {
           method = nm->method();
           bci = 0;
         } else {
           PcDesc* pd = nm->pc_desc_at(pc);
           decode_offset = pd->scope_decode_offset();
           // if decode_offset is not equal to 0, it will execute the
           // "compiled java method case" at the beginning of the loop.
           continue;
         }
       }
     }
 #ifdef ASSERT
   assert(st_method() == method && st.bci() == bci,
          "Wrong stack trace");
   st.next();
   // vframeStream::method isn't GC-safe so store off a copy
   // of the methodOop in case we GC.
   if (!st.at_end()) {
     st_method = st.method();
   }
 #endif
     if (!skip_fillInStackTrace_check) {
       // check "fillInStackTrace" only once, so we negate the flag
       // after the first time check.
       skip_fillInStackTrace_check = true;
       if (method->name() == vmSymbols::fillInStackTrace_name()) {
         continue;
       }
     }
     // skip <init> methods of the exceptions klass. If there is <init> methods
     // that belongs to a superclass of the exception  we are going to skipping
     // them in stack trace. This is simlar to classic VM.
     if (!skip_throwableInit_check) {
       if (method->name() == vmSymbols::object_initializer_name() &&
           throwable->is_a(method->method_holder())) {
         continue;
       } else {
         // if no "Throwable.init()" method found, we stop checking it next time.
         skip_throwableInit_check = true;
       }
     }
     bt.push(method, bci, CHECK);
     total_count++;
   }
   // Put completed stack trace into throwable object
   set_backtrace(throwable(), bt.backtrace());
 }
 void java_lang_Throwable::fill_in_stack_trace(Handle throwable) {
   // No-op if stack trace is disabled
   if (!StackTraceInThrowable) {
     return;
   }
   // Disable stack traces for some preallocated out of memory errors
   if (!Universe::should_fill_in_stack_trace(throwable)) {
     return;
   }
   PRESERVE_EXCEPTION_MARK;
   JavaThread* thread = JavaThread::active();
   fill_in_stack_trace(throwable, thread);
   // ignore exceptions thrown during stack trace filling
   CLEAR_PENDING_EXCEPTION;
 }
 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
   // Allocate stack trace - backtrace is created but not filled in
   // No-op if stack trace is disabled
   if (!StackTraceInThrowable) return;
   objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK);
   objArrayHandle backtrace  (THREAD, h_oop);
   objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK);
   objArrayHandle methods (THREAD, m_oop);
   typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK);
   typeArrayHandle bcis(THREAD, b);
   // backtrace has space for one chunk (next is NULL)
   backtrace->obj_at_put(trace_methods_offset, methods());
   backtrace->obj_at_put(trace_bcis_offset, bcis());
   set_backtrace(throwable(), backtrace());
 }
 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
   // Fill in stack trace into preallocated backtrace (no GC)
   // No-op if stack trace is disabled
   if (!StackTraceInThrowable) return;
   assert(throwable->is_a(SystemDictionary::throwable_klass()), "sanity check");
   oop backtrace = java_lang_Throwable::backtrace(throwable());
   assert(backtrace != NULL, "backtrace not preallocated");
   oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset);
   objArrayOop methods = objArrayOop(m);
   assert(methods != NULL && methods->length() > 0, "method array not preallocated");
   oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset);
   typeArrayOop bcis = typeArrayOop(b);
   assert(bcis != NULL, "bci array not preallocated");
   assert(methods->length() == bcis->length(), "method and bci arrays should match");
   JavaThread* thread = JavaThread::current();
   ResourceMark rm(thread);
   vframeStream st(thread);
   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
   // methods as preallocated errors aren't created by "java" code.
   // fill in as much stack trace as possible
   int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
   int chunk_count = 0;
   for (;!st.at_end(); st.next()) {
     // add element
     bcis->ushort_at_put(chunk_count, st.bci());
     methods->obj_at_put(chunk_count, st.method());
     chunk_count++;
     // Bail-out for deep stacks
     if (chunk_count >= max_chunks) break;
   }
 }
 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
   if (throwable == NULL) {
     THROW_0(vmSymbols::java_lang_NullPointerException());
   }
   objArrayOop chunk = objArrayOop(backtrace(throwable));
   int depth = 0;
   if (chunk != NULL) {
     // Iterate over chunks and count full ones
     while (true) {
       objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
       if (next == NULL) break;
       depth += trace_chunk_size;
       chunk = next;
     }
     assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
     // Count element in remaining partial chunk
     objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
     assert(methods != NULL && bcis != NULL, "sanity check");
     for (int i = 0; i < methods->length(); i++) {
       if (methods->obj_at(i) == NULL) break;
       depth++;
     }
   }
   return depth;
 }
 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
   if (throwable == NULL) {
     THROW_0(vmSymbols::java_lang_NullPointerException());
   }
   if (index < 0) {
     THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
   }
   // Compute how many chunks to skip and index into actual chunk
   objArrayOop chunk = objArrayOop(backtrace(throwable));
   int skip_chunks = index / trace_chunk_size;
   int chunk_index = index % trace_chunk_size;
   while (chunk != NULL && skip_chunks > 0) {
     chunk = objArrayOop(chunk->obj_at(trace_next_offset));
         skip_chunks--;
   }
   if (chunk == NULL) {
     THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
   }
   // Get method,bci from chunk
   objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
   typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
   assert(methods != NULL && bcis != NULL, "sanity check");
   methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index)));
   int bci = bcis->ushort_at(chunk_index);
   // Chunk can be partial full
   if (method.is_null()) {
     THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
   }
   oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0);
   return element;
 }
 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
   // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs
   assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
   // Allocate java.lang.StackTraceElement instance
   klassOop k = SystemDictionary::stackTraceElement_klass();
   assert(k != NULL, "must be loaded in 1.4+");
   instanceKlassHandle ik (THREAD, k);
   if (ik->should_be_initialized()) {
     ik->initialize(CHECK_0);
   }
   Handle element = ik->allocate_instance_handle(CHECK_0);
   // Fill in class name
   ResourceMark rm(THREAD);
   const char* str = instanceKlass::cast(method->method_holder())->external_name();
   oop classname = StringTable::intern((char*) str, CHECK_0);
   java_lang_StackTraceElement::set_declaringClass(element(), classname);
   // Fill in method name
   oop methodname = StringTable::intern(method->name(), CHECK_0);
   java_lang_StackTraceElement::set_methodName(element(), methodname);
   // Fill in source file name
   symbolOop source = instanceKlass::cast(method->method_holder())->source_file_name();
   oop filename = StringTable::intern(source, CHECK_0);
   java_lang_StackTraceElement::set_fileName(element(), filename);
   // File in source line number
   int line_number;
   if (method->is_native()) {
     // Negative value different from -1 below, enabling Java code in
     // class java.lang.StackTraceElement to distinguish "native" from
     // "no LineNumberTable".
     line_number = -2;
   } else {
     // Returns -1 if no LineNumberTable, and otherwise actual line number
     line_number = method->line_number_from_bci(bci);
   }
   java_lang_StackTraceElement::set_lineNumber(element(), line_number);
   return element();
 }
 void java_lang_reflect_AccessibleObject::compute_offsets() {
   klassOop k = SystemDictionary::reflect_accessible_object_klass();
   compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
 }
 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   return (jboolean) reflect->bool_field(override_offset);
 }
 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   reflect->bool_field_put(override_offset, (int) value);
 }
 void java_lang_reflect_Method::compute_offsets() {
   klassOop k = SystemDictionary::reflect_method_klass();
   compute_offset(clazz_offset,          k, vmSymbols::clazz_name(),          vmSymbols::class_signature());
   compute_offset(name_offset,           k, vmSymbols::name_name(),           vmSymbols::string_signature());
   compute_offset(returnType_offset,     k, vmSymbols::returnType_name(),     vmSymbols::class_signature());
   compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
   compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
   compute_offset(slot_offset,           k, vmSymbols::slot_name(),           vmSymbols::int_signature());
   compute_offset(modifiers_offset,      k, vmSymbols::modifiers_name(),      vmSymbols::int_signature());
   // The generic signature and annotations fields are only present in 1.5
   signature_offset = -1;
   annotations_offset = -1;
   parameter_annotations_offset = -1;
   annotation_default_offset = -1;
   compute_optional_offset(signature_offset,             k, vmSymbols::signature_name(),             vmSymbols::string_signature());
   compute_optional_offset(annotations_offset,           k, vmSymbols::annotations_name(),           vmSymbols::byte_array_signature());
   compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
   compute_optional_offset(annotation_default_offset,    k, vmSymbols::annotation_default_name(),    vmSymbols::byte_array_signature());
 }
 Handle java_lang_reflect_Method::create(TRAPS) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   klassOop klass = SystemDictionary::reflect_method_klass();
   // This class is eagerly initialized during VM initialization, since we keep a refence
   // to one of the methods
   assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized");
   return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
 }
 oop java_lang_reflect_Method::clazz(oop reflect) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   return reflect->obj_field(clazz_offset);
 }
 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
    reflect->obj_field_put(clazz_offset, value);
 }
 int java_lang_reflect_Method::slot(oop reflect) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   return reflect->int_field(slot_offset);
 }
 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   reflect->int_field_put(slot_offset, value);
 }
 oop java_lang_reflect_Method::name(oop method) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   return method->obj_field(name_offset);
 }
 void java_lang_reflect_Method::set_name(oop method, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   method->obj_field_put(name_offset, value);
 }
 oop java_lang_reflect_Method::return_type(oop method) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   return method->obj_field(returnType_offset);
 }
 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   method->obj_field_put(returnType_offset, value);
 }
 oop java_lang_reflect_Method::parameter_types(oop method) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   return method->obj_field(parameterTypes_offset);
 }
 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   method->obj_field_put(parameterTypes_offset, value);
 }
 oop java_lang_reflect_Method::exception_types(oop method) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   return method->obj_field(exceptionTypes_offset);
 }
 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   method->obj_field_put(exceptionTypes_offset, value);
 }
 int java_lang_reflect_Method::modifiers(oop method) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   return method->int_field(modifiers_offset);
 }
 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   method->int_field_put(modifiers_offset, value);
 }
 bool java_lang_reflect_Method::has_signature_field() {
   return (signature_offset >= 0);
 }
 oop java_lang_reflect_Method::signature(oop method) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   assert(has_signature_field(), "signature field must be present");
   return method->obj_field(signature_offset);
 }
 void java_lang_reflect_Method::set_signature(oop method, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   assert(has_signature_field(), "signature field must be present");
   method->obj_field_put(signature_offset, value);
 }
 bool java_lang_reflect_Method::has_annotations_field() {
   return (annotations_offset >= 0);
 }
 oop java_lang_reflect_Method::annotations(oop method) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   assert(has_annotations_field(), "annotations field must be present");
   return method->obj_field(annotations_offset);
 }
 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   assert(has_annotations_field(), "annotations field must be present");
   method->obj_field_put(annotations_offset, value);
 }
 bool java_lang_reflect_Method::has_parameter_annotations_field() {
   return (parameter_annotations_offset >= 0);
 }
 oop java_lang_reflect_Method::parameter_annotations(oop method) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
   return method->obj_field(parameter_annotations_offset);
 }
 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
   method->obj_field_put(parameter_annotations_offset, value);
 }
 bool java_lang_reflect_Method::has_annotation_default_field() {
   return (annotation_default_offset >= 0);
 }
 oop java_lang_reflect_Method::annotation_default(oop method) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   assert(has_annotation_default_field(), "annotation default field must be present");
   return method->obj_field(annotation_default_offset);
 }
 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   assert(has_annotation_default_field(), "annotation default field must be present");
   method->obj_field_put(annotation_default_offset, value);
 }
 void java_lang_reflect_Constructor::compute_offsets() {
   klassOop k = SystemDictionary::reflect_constructor_klass();
   compute_offset(clazz_offset,          k, vmSymbols::clazz_name(),          vmSymbols::class_signature());
   compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
   compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
   compute_offset(slot_offset,           k, vmSymbols::slot_name(),           vmSymbols::int_signature());
   compute_offset(modifiers_offset,      k, vmSymbols::modifiers_name(),      vmSymbols::int_signature());
   // The generic signature and annotations fields are only present in 1.5
   signature_offset = -1;
   annotations_offset = -1;
   parameter_annotations_offset = -1;
   compute_optional_offset(signature_offset,             k, vmSymbols::signature_name(),             vmSymbols::string_signature());
   compute_optional_offset(annotations_offset,           k, vmSymbols::annotations_name(),           vmSymbols::byte_array_signature());
   compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
 }
 Handle java_lang_reflect_Constructor::create(TRAPS) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor();
   klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
   instanceKlassHandle klass (THREAD, k);
   // Ensure it is initialized
   klass->initialize(CHECK_NH);
   return klass->allocate_instance_handle(CHECK_NH);
 }
 oop java_lang_reflect_Constructor::clazz(oop reflect) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   return reflect->obj_field(clazz_offset);
 }
 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
    reflect->obj_field_put(clazz_offset, value);
 }
 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   return constructor->obj_field(parameterTypes_offset);
 }
 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   constructor->obj_field_put(parameterTypes_offset, value);
 }
 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   return constructor->obj_field(exceptionTypes_offset);
 }
 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   constructor->obj_field_put(exceptionTypes_offset, value);
 }
 int java_lang_reflect_Constructor::slot(oop reflect) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   return reflect->int_field(slot_offset);
 }
 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   reflect->int_field_put(slot_offset, value);
 }
 int java_lang_reflect_Constructor::modifiers(oop constructor) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   return constructor->int_field(modifiers_offset);
 }
 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   constructor->int_field_put(modifiers_offset, value);
 }
 bool java_lang_reflect_Constructor::has_signature_field() {
   return (signature_offset >= 0);
 }
 oop java_lang_reflect_Constructor::signature(oop constructor) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   assert(has_signature_field(), "signature field must be present");
   return constructor->obj_field(signature_offset);
 }
 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   assert(has_signature_field(), "signature field must be present");
   constructor->obj_field_put(signature_offset, value);
 }
 bool java_lang_reflect_Constructor::has_annotations_field() {
   return (annotations_offset >= 0);
 }
 oop java_lang_reflect_Constructor::annotations(oop constructor) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   assert(has_annotations_field(), "annotations field must be present");
   return constructor->obj_field(annotations_offset);
 }
 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   assert(has_annotations_field(), "annotations field must be present");
   constructor->obj_field_put(annotations_offset, value);
 }
 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
   return (parameter_annotations_offset >= 0);
 }
 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
   return method->obj_field(parameter_annotations_offset);
 }
 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
   method->obj_field_put(parameter_annotations_offset, value);
 }
 void java_lang_reflect_Field::compute_offsets() {
   klassOop k = SystemDictionary::reflect_field_klass();
   compute_offset(clazz_offset,     k, vmSymbols::clazz_name(),     vmSymbols::class_signature());
   compute_offset(name_offset,      k, vmSymbols::name_name(),      vmSymbols::string_signature());
   compute_offset(type_offset,      k, vmSymbols::type_name(),      vmSymbols::class_signature());
   compute_offset(slot_offset,      k, vmSymbols::slot_name(),      vmSymbols::int_signature());
   compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
   // The generic signature and annotations fields are only present in 1.5
   signature_offset = -1;
   annotations_offset = -1;
   compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
   compute_optional_offset(annotations_offset,  k, vmSymbols::annotations_name(),  vmSymbols::byte_array_signature());
 }
 Handle java_lang_reflect_Field::create(TRAPS) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   symbolHandle name = vmSymbolHandles::java_lang_reflect_Field();
   klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
   instanceKlassHandle klass (THREAD, k);
   // Ensure it is initialized
   klass->initialize(CHECK_NH);
   return klass->allocate_instance_handle(CHECK_NH);
 }
 oop java_lang_reflect_Field::clazz(oop reflect) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   return reflect->obj_field(clazz_offset);
 }
 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
    reflect->obj_field_put(clazz_offset, value);
 }
 oop java_lang_reflect_Field::name(oop field) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   return field->obj_field(name_offset);
 }
 void java_lang_reflect_Field::set_name(oop field, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   field->obj_field_put(name_offset, value);
 }
 oop java_lang_reflect_Field::type(oop field) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   return field->obj_field(type_offset);
 }
 void java_lang_reflect_Field::set_type(oop field, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   field->obj_field_put(type_offset, value);
 }
 int java_lang_reflect_Field::slot(oop reflect) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   return reflect->int_field(slot_offset);
 }
 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   reflect->int_field_put(slot_offset, value);
 }
 int java_lang_reflect_Field::modifiers(oop field) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   return field->int_field(modifiers_offset);
 }
 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   field->int_field_put(modifiers_offset, value);
 }
 bool java_lang_reflect_Field::has_signature_field() {
   return (signature_offset >= 0);
 }
 oop java_lang_reflect_Field::signature(oop field) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   assert(has_signature_field(), "signature field must be present");
   return field->obj_field(signature_offset);
 }
 void java_lang_reflect_Field::set_signature(oop field, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   assert(has_signature_field(), "signature field must be present");
   field->obj_field_put(signature_offset, value);
 }
 bool java_lang_reflect_Field::has_annotations_field() {
   return (annotations_offset >= 0);
 }
 oop java_lang_reflect_Field::annotations(oop field) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   assert(has_annotations_field(), "annotations field must be present");
   return field->obj_field(annotations_offset);
 }
 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   assert(has_annotations_field(), "annotations field must be present");
   field->obj_field_put(annotations_offset, value);
 }
 void sun_reflect_ConstantPool::compute_offsets() {
   klassOop k = SystemDictionary::reflect_constant_pool_klass();
   // This null test can be removed post beta
   if (k != NULL) {
     compute_offset(_cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature());
   }
 }
 Handle sun_reflect_ConstantPool::create(TRAPS) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   klassOop k = SystemDictionary::reflect_constant_pool_klass();
   instanceKlassHandle klass (THREAD, k);
   // Ensure it is initialized
   klass->initialize(CHECK_NH);
   return klass->allocate_instance_handle(CHECK_NH);
 }
 oop sun_reflect_ConstantPool::cp_oop(oop reflect) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   return reflect->obj_field(_cp_oop_offset);
 }
 void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) {
   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
   reflect->obj_field_put(_cp_oop_offset, value);
 }
 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
   klassOop k = SystemDictionary::reflect_unsafe_static_field_accessor_impl_klass();
   // This null test can be removed post beta
   if (k != NULL) {
     compute_offset(_base_offset, k,
                    vmSymbols::base_name(), vmSymbols::object_signature());
   }
 }
 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
   klassOop k = SystemDictionary::box_klass(type);
   if (k == NULL)  return NULL;
   instanceKlassHandle h (THREAD, k);
   if (!h->is_initialized())  h->initialize(CHECK_0);
   return h->allocate_instance(THREAD);
 }
 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
   oop box = initialize_and_allocate(type, CHECK_0);
   if (box == NULL)  return NULL;
   switch (type) {
     case T_BOOLEAN:
       box->bool_field_put(value_offset, value->z);
       break;
     case T_CHAR:
       box->char_field_put(value_offset, value->c);
       break;
     case T_FLOAT:
       box->float_field_put(value_offset, value->f);
       break;
     case T_DOUBLE:
       box->double_field_put(value_offset, value->d);
       break;
     case T_BYTE:
       box->byte_field_put(value_offset, value->b);
       break;
     case T_SHORT:
       box->short_field_put(value_offset, value->s);
       break;
     case T_INT:
       box->int_field_put(value_offset, value->i);
       break;
     case T_LONG:
       box->long_field_put(value_offset, value->j);
       break;
     default:
       return NULL;
   }
   return box;
 }
 BasicType java_lang_boxing_object::basic_type(oop box) {
   if (box == NULL)  return T_ILLEGAL;
   BasicType type = SystemDictionary::box_klass_type(box->klass());
   if (type == T_OBJECT)         // 'unknown' value returned by SD::bkt
     return T_ILLEGAL;
   return type;
 }
 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
   BasicType type = SystemDictionary::box_klass_type(box->klass());
   switch (type) {
   case T_BOOLEAN:
     value->z = box->bool_field(value_offset);
     break;
   case T_CHAR:
     value->c = box->char_field(value_offset);
     break;
   case T_FLOAT:
     value->f = box->float_field(value_offset);
     break;
   case T_DOUBLE:
     value->d = box->double_field(value_offset);
     break;
   case T_BYTE:
     value->b = box->byte_field(value_offset);
     break;
   case T_SHORT:
     value->s = box->short_field(value_offset);
     break;
   case T_INT:
     value->i = box->int_field(value_offset);
     break;
   case T_LONG:
     value->j = box->long_field(value_offset);
     break;
   default:
     return T_ILLEGAL;
   } // end switch
   return type;
 }
 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
   BasicType type = SystemDictionary::box_klass_type(box->klass());
   switch (type) {
   case T_BOOLEAN:
     box->bool_field_put(value_offset, value->z);
     break;
   case T_CHAR:
     box->char_field_put(value_offset, value->c);
     break;
   case T_FLOAT:
     box->float_field_put(value_offset, value->f);
     break;
   case T_DOUBLE:
     box->double_field_put(value_offset, value->d);
     break;
   case T_BYTE:
     box->byte_field_put(value_offset, value->b);
     break;
   case T_SHORT:
     box->short_field_put(value_offset, value->s);
     break;
   case T_INT:
     box->int_field_put(value_offset, value->i);
     break;
   case T_LONG:
     box->long_field_put(value_offset, value->j);
     break;
   default:
     return T_ILLEGAL;
   } // end switch
   return type;
 }
 // Support for java_lang_ref_Reference
 oop java_lang_ref_Reference::pending_list_lock() {
   instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass());
   char *addr = (((char *)ik->start_of_static_fields()) + static_lock_offset);
   if (UseCompressedOops) {
     return oopDesc::load_decode_heap_oop((narrowOop *)addr);
   } else {
     return oopDesc::load_decode_heap_oop((oop*)addr);
   }
 }
 HeapWord *java_lang_ref_Reference::pending_list_addr() {
   instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass());
   char *addr = (((char *)ik->start_of_static_fields()) + static_pending_offset);
   // XXX This might not be HeapWord aligned, almost rather be char *.
   return (HeapWord*)addr;
 }
 oop java_lang_ref_Reference::pending_list() {
   char *addr = (char *)pending_list_addr();
   if (UseCompressedOops) {
     return oopDesc::load_decode_heap_oop((narrowOop *)addr);
   } else {
     return oopDesc::load_decode_heap_oop((oop*)addr);
   }
 }
 // Support for java_lang_ref_SoftReference
 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
   return ref->long_field(timestamp_offset);
 }
 jlong java_lang_ref_SoftReference::clock() {
   instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass());
   int offset = ik->offset_of_static_fields() + static_clock_offset;
   return SystemDictionary::soft_reference_klass()->long_field(offset);
 }
 void java_lang_ref_SoftReference::set_clock(jlong value) {
   instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass());
   int offset = ik->offset_of_static_fields() + static_clock_offset;
   SystemDictionary::soft_reference_klass()->long_field_put(offset, value);
 }
 // Support for java_security_AccessControlContext
 int java_security_AccessControlContext::_context_offset = 0;
 int java_security_AccessControlContext::_privilegedContext_offset = 0;
 int java_security_AccessControlContext::_isPrivileged_offset = 0;
 void java_security_AccessControlContext::compute_offsets() {
   assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
   fieldDescriptor fd;
   instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass());
   if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
     fatal("Invalid layout of java.security.AccessControlContext");
   }
   _context_offset = fd.offset();
   if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
     fatal("Invalid layout of java.security.AccessControlContext");
   }
   _privilegedContext_offset = fd.offset();
   if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
     fatal("Invalid layout of java.security.AccessControlContext");
   }
   _isPrivileged_offset = fd.offset();
 }
 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
   assert(_isPrivileged_offset != 0, "offsets should have been initialized");
   // Ensure klass is initialized
   instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
   // Allocate result
   oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
   // Fill in values
   result->obj_field_put(_context_offset, context());
   result->obj_field_put(_privilegedContext_offset, privileged_context());
   result->bool_field_put(_isPrivileged_offset, isPrivileged);
   return result;
 }
 // Support for java_lang_ClassLoader
 oop java_lang_ClassLoader::parent(oop loader) {
   assert(loader->is_oop(), "loader must be oop");
   return loader->obj_field(parent_offset);
 }
 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
   // Fix for 4474172; see evaluation for more details
   loader = non_reflection_class_loader(loader);
   oop cl = SystemDictionary::java_system_loader();
   while(cl != NULL) {
     if (cl == loader) return true;
     cl = parent(cl);
   }
   return false;
 }
 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
   if (loader != NULL) {
     // See whether this is one of the class loaders associated with
     // the generated bytecodes for reflection, and if so, "magically"
     // delegate to its parent to prevent class loading from occurring
     // in places where applications using reflection didn't expect it.
     klassOop delegating_cl_class = SystemDictionary::reflect_delegating_classloader_klass();
     // This might be null in non-1.4 JDKs
     if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
       return parent(loader);
     }
   }
   return loader;
 }
 // Support for java_lang_System
 void java_lang_System::compute_offsets() {
   assert(offset_of_static_fields == 0, "offsets should be initialized only once");
   instanceKlass* ik = instanceKlass::cast(SystemDictionary::system_klass());
   offset_of_static_fields = ik->offset_of_static_fields();
 }
 int java_lang_System::in_offset_in_bytes() {
   return (offset_of_static_fields + static_in_offset);
 }
 int java_lang_System::out_offset_in_bytes() {
   return (offset_of_static_fields + static_out_offset);
 }
 int java_lang_System::err_offset_in_bytes() {
   return (offset_of_static_fields + static_err_offset);
 }
 int java_lang_String::value_offset;
 int java_lang_String::offset_offset;
 int java_lang_String::count_offset;
 int java_lang_String::hash_offset;
 int java_lang_Class::klass_offset;
 int java_lang_Class::array_klass_offset;
 int java_lang_Class::resolved_constructor_offset;
 int java_lang_Class::number_of_fake_oop_fields;
 int java_lang_Throwable::backtrace_offset;
 int java_lang_Throwable::detailMessage_offset;
 int java_lang_Throwable::cause_offset;
 int java_lang_Throwable::stackTrace_offset;
 int java_lang_reflect_AccessibleObject::override_offset;
 int java_lang_reflect_Method::clazz_offset;
 int java_lang_reflect_Method::name_offset;
 int java_lang_reflect_Method::returnType_offset;
 int java_lang_reflect_Method::parameterTypes_offset;
 int java_lang_reflect_Method::exceptionTypes_offset;
 int java_lang_reflect_Method::slot_offset;
 int java_lang_reflect_Method::modifiers_offset;
 int java_lang_reflect_Method::signature_offset;
 int java_lang_reflect_Method::annotations_offset;
 int java_lang_reflect_Method::parameter_annotations_offset;
 int java_lang_reflect_Method::annotation_default_offset;
 int java_lang_reflect_Constructor::clazz_offset;
 int java_lang_reflect_Constructor::parameterTypes_offset;
 int java_lang_reflect_Constructor::exceptionTypes_offset;
 int java_lang_reflect_Constructor::slot_offset;
 int java_lang_reflect_Constructor::modifiers_offset;
 int java_lang_reflect_Constructor::signature_offset;
 int java_lang_reflect_Constructor::annotations_offset;
 int java_lang_reflect_Constructor::parameter_annotations_offset;
 int java_lang_reflect_Field::clazz_offset;
 int java_lang_reflect_Field::name_offset;
 int java_lang_reflect_Field::type_offset;
 int java_lang_reflect_Field::slot_offset;
 int java_lang_reflect_Field::modifiers_offset;
 int java_lang_reflect_Field::signature_offset;
 int java_lang_reflect_Field::annotations_offset;
 int java_lang_boxing_object::value_offset;
 int java_lang_ref_Reference::referent_offset;
 int java_lang_ref_Reference::queue_offset;
 int java_lang_ref_Reference::next_offset;
 int java_lang_ref_Reference::discovered_offset;
 int java_lang_ref_Reference::static_lock_offset;
 int java_lang_ref_Reference::static_pending_offset;
 int java_lang_ref_Reference::number_of_fake_oop_fields;
 int java_lang_ref_SoftReference::timestamp_offset;
 int java_lang_ref_SoftReference::static_clock_offset;
 int java_lang_ClassLoader::parent_offset;
 int java_lang_System::offset_of_static_fields;
 int java_lang_System::static_in_offset;
 int java_lang_System::static_out_offset;
 int java_lang_System::static_err_offset;
 int java_lang_StackTraceElement::declaringClass_offset;
 int java_lang_StackTraceElement::methodName_offset;
 int java_lang_StackTraceElement::fileName_offset;
 int java_lang_StackTraceElement::lineNumber_offset;
 int java_lang_AssertionStatusDirectives::classes_offset;
 int java_lang_AssertionStatusDirectives::classEnabled_offset;
 int java_lang_AssertionStatusDirectives::packages_offset;
 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
 int java_lang_AssertionStatusDirectives::deflt_offset;
 int java_nio_Buffer::_limit_offset;
 int sun_misc_AtomicLongCSImpl::_value_offset;
 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
 int sun_reflect_ConstantPool::_cp_oop_offset;
 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
 // Support for java_lang_StackTraceElement
 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
   element->obj_field_put(fileName_offset, value);
 }
 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
   element->obj_field_put(declaringClass_offset, value);
 }
 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
   element->obj_field_put(methodName_offset, value);
 }
 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
   element->int_field_put(lineNumber_offset, value);
 }
 // Support for java Assertions - java_lang_AssertionStatusDirectives.
 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
   o->obj_field_put(classes_offset, val);
 }
 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
   o->obj_field_put(classEnabled_offset, val);
 }
 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
   o->obj_field_put(packages_offset, val);
 }
 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
   o->obj_field_put(packageEnabled_offset, val);
 }
 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
   o->bool_field_put(deflt_offset, val);
 }
 // Support for intrinsification of java.nio.Buffer.checkIndex
 int java_nio_Buffer::limit_offset() {
   return _limit_offset;
 }
 void java_nio_Buffer::compute_offsets() {
   klassOop k = SystemDictionary::java_nio_Buffer_klass();
   assert(k != NULL, "must be loaded in 1.4+");
   compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
 }
 // Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate
 int sun_misc_AtomicLongCSImpl::value_offset() {
   assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this");
   return _value_offset;
 }
 void sun_misc_AtomicLongCSImpl::compute_offsets() {
   klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass();
   // If this class is not present, its value field offset won't be referenced.
   if (k != NULL) {
     compute_offset(_value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature());
   }
 }
 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
   if (_owner_offset != 0) return;
   assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
   SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
   klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass();
   compute_offset(_owner_offset, k,
                  vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
 }
 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
   assert(_owner_offset != 0, "Must be initialized");
   return obj->obj_field(_owner_offset);
 }
 // Compute hard-coded offsets
 // Invoked before SystemDictionary::initialize, so pre-loaded classes
 // are not available to determine the offset_of_static_fields.
 void JavaClasses::compute_hard_coded_offsets() {
   const int x = heapOopSize;
   // Objects don't get allocated in the gap in the header with compressed oops
   // for these special classes because hard coded offsets can't be conditional
   // so base_offset_in_bytes() is wrong here, allocate after the header.
   const int header = sizeof(instanceOopDesc);
   // Do the String Class
   java_lang_String::value_offset  = java_lang_String::hc_value_offset  * x + header;
   java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header;
   java_lang_String::count_offset  = java_lang_String::offset_offset + sizeof (jint);
   java_lang_String::hash_offset   = java_lang_String::count_offset + sizeof (jint);
   // Do the Class Class
   java_lang_Class::klass_offset = java_lang_Class::hc_klass_offset * x + header;
   java_lang_Class::array_klass_offset = java_lang_Class::hc_array_klass_offset * x + header;
   java_lang_Class::resolved_constructor_offset = java_lang_Class::hc_resolved_constructor_offset * x + header;
   // This is NOT an offset
   java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields;
   // Throwable Class
   java_lang_Throwable::backtrace_offset  = java_lang_Throwable::hc_backtrace_offset  * x + header;
   java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
   java_lang_Throwable::cause_offset      = java_lang_Throwable::hc_cause_offset      * x + header;
   java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
   // java_lang_boxing_object
   java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset * x + header;
   // java_lang_ref_Reference:
   java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
   java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
   java_lang_ref_Reference::next_offset  = java_lang_ref_Reference::hc_next_offset * x + header;
   java_lang_ref_Reference::discovered_offset  = java_lang_ref_Reference::hc_discovered_offset * x + header;
   java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset *  x;
   java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
   // Artificial fields for java_lang_ref_Reference
   // The first field is for the discovered field added in 1.4
   java_lang_ref_Reference::number_of_fake_oop_fields = 1;
   // java_lang_ref_SoftReference Class
   java_lang_ref_SoftReference::timestamp_offset = java_lang_ref_SoftReference::hc_timestamp_offset * x + header;
   // Don't multiply static fields because they are always in wordSize units
   java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
   // java_lang_ClassLoader
   java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
   // java_lang_System
   java_lang_System::static_in_offset  = java_lang_System::hc_static_in_offset  * x;
   java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
   java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
   // java_lang_StackTraceElement
   java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset  * x + header;
   java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
   java_lang_StackTraceElement::fileName_offset   = java_lang_StackTraceElement::hc_fileName_offset   * x + header;
   java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
   java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
   java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
   java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
   java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
   java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
 }
 // Compute non-hard-coded field offsets of all the classes in this file
 void JavaClasses::compute_offsets() {
   java_lang_Class::compute_offsets();
   java_lang_System::compute_offsets();
   java_lang_Thread::compute_offsets();
   java_lang_ThreadGroup::compute_offsets();
   java_security_AccessControlContext::compute_offsets();
   // Initialize reflection classes. The layouts of these classes
   // changed with the new reflection implementation in JDK 1.4, and
   // since the Universe doesn't know what JDK version it is until this
   // point we defer computation of these offsets until now.
   java_lang_reflect_AccessibleObject::compute_offsets();
   java_lang_reflect_Method::compute_offsets();
   java_lang_reflect_Constructor::compute_offsets();
   java_lang_reflect_Field::compute_offsets();
   if (JDK_Version::is_gte_jdk14x_version()) {
     java_nio_Buffer::compute_offsets();
   }
   if (JDK_Version::is_gte_jdk15x_version()) {
     sun_reflect_ConstantPool::compute_offsets();
     sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
   }
   sun_misc_AtomicLongCSImpl::compute_offsets();
 }
 #ifndef PRODUCT
 // These functions exist to assert the validity of hard-coded field offsets to guard
 // against changes in the class files
 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
   EXCEPTION_MARK;
   fieldDescriptor fd;
   symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
   klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
   instanceKlassHandle h_klass (THREAD, k);
   //instanceKlassHandle h_klass(klass);
   symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
   symbolHandle f_sig  = oopFactory::new_symbol_handle(field_sig, CATCH);
   if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
     tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
     return false;
   }
   if (fd.is_static()) {
     tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
     return false;
   }
   if (fd.offset() == hardcoded_offset ) {
     return true;
   } else {
     tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
                   klass_name, field_name, hardcoded_offset, fd.offset());
     return false;
   }
 }
 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
   EXCEPTION_MARK;
   fieldDescriptor fd;
   symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
   klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
   instanceKlassHandle h_klass (THREAD, k);
   symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
   symbolHandle f_sig  = oopFactory::new_symbol_handle(field_sig, CATCH);
   if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
     tty->print_cr("Static field %s.%s not found", klass_name, field_name);
     return false;
   }
   if (!fd.is_static()) {
     tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
     return false;
   }
   if (fd.offset() == hardcoded_offset + h_klass->offset_of_static_fields()) {
     return true;
   } else {
     tty->print_cr("Offset of static field %s.%s is hardcoded as %d but should really be %d.", klass_name, field_name, hardcoded_offset, fd.offset() - h_klass->offset_of_static_fields());
     return false;
   }
 }
 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
   EXCEPTION_MARK;
   fieldDescriptor fd;
   symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH);
   klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
   instanceKlassHandle h_klass (THREAD, k);
   symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH);
   symbolHandle f_sig  = oopFactory::new_symbol_handle(field_sig, CATCH);
   if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) {
     tty->print_cr("Static field %s.%s not found", klass_name, field_name);
     return false;
   }
   if (!fd.is_static() || !fd.has_initial_value()) {
     tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
     return false;
   }
   if (!fd.initial_value_tag().is_int()) {
     tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
     return false;
   }
   jint field_value = fd.int_initial_value();
   if (field_value == hardcoded_constant) {
     return true;
   } else {
     tty->print_cr("Constant value of static field %s.%s is hardcoded as %d but should really be %d.", klass_name, field_name, hardcoded_constant, field_value);
     return false;
   }
 }
 // Check the hard-coded field offsets of all the classes in this file
 void JavaClasses::check_offsets() {
   bool valid = true;
 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
   valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
   valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
   valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
   // java.lang.String
   CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
   CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
   CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
   CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
   // java.lang.Class
   // Fake fields
   // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
   // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
   // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked
   // java.lang.Throwable
   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
   // Boxed primitive objects (java_lang_boxing_object)
   CHECK_OFFSET("java/lang/Boolean",   java_lang_boxing_object, value, "Z");
   CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
   CHECK_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
   CHECK_OFFSET("java/lang/Double",    java_lang_boxing_object, value, "D");
   CHECK_OFFSET("java/lang/Byte",      java_lang_boxing_object, value, "B");
   CHECK_OFFSET("java/lang/Short",     java_lang_boxing_object, value, "S");
   CHECK_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
   CHECK_OFFSET("java/lang/Long",      java_lang_boxing_object, value, "J");
   // java.lang.ClassLoader
   CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent,      "Ljava/lang/ClassLoader;");
   // java.lang.System
   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System,  in, "Ljava/io/InputStream;");
   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
   // java.lang.StackTraceElement
   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement,   fileName, "Ljava/lang/String;");
   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
   // java.lang.ref.Reference
   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
   // Fake field
   //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
   CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
   CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
   // java.lang.ref.SoftReference
   CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
   CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
   // java.lang.AssertionStatusDirectives
   //
   // The CheckAssertionStatusDirectives boolean can be removed from here and
   // globals.hpp after the AssertionStatusDirectives class has been integrated
   // into merlin "for some time."  Without it, the vm will fail with early
   // merlin builds.
   if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
     const char* nm = "java/lang/AssertionStatusDirectives";
     const char* sig = "[Ljava/lang/String;";
     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
   }
   if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
 }
 #endif // PRODUCT
 void javaClasses_init() {
   JavaClasses::compute_offsets();
   JavaClasses::check_offsets();
   FilteredFieldsMap::initialize();  // must be done after computing offsets.
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/classfile/javaClasses.cpp@60b728ec77c1 (annotated)

src/share/vm/classfile/javaClasses.cpp