truffle: src/share/vm/classfile/javaClasses.cpp comparison

comparison src/share/vm/classfile/javaClasses.cpp @ 0:a61af66fc99e jdk7-b24

Initial load

author	duke
date	Sat, 01 Dec 2007 00:00:00 +0000
parents
children	90f5ddc7297b

comparison

equal deleted inserted replaced

--1:000000000000
+:a61af66fc99e
+/*
+* 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 macro for computing field offsets at run time rather than hardcoding them
+#define COMPUTE_OFFSET(klass_name_as_C_str, dest_offset, klass_oop, name_symbol, signature_symbol) \
+{                                                                                                  \
+fieldDescriptor fd;                                                                              \
+instanceKlass* ik = instanceKlass::cast(klass_oop);                                              \
+if (!ik->find_local_field(name_symbol, signature_symbol, &fd)) {                                 \
+fatal("Invalid layout of " klass_name_as_C_str);                                               \
+}                                                                                                \
+dest_offset = fd.offset();                                                                       \
+}
+// Same as above but for "optional" offsets that might not be present in certain JDK versions
+#define COMPUTE_OPTIONAL_OFFSET(klass_name_as_C_str, dest_offset, klass_oop, name_symbol, 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");
+ThreadToNativeFromVM ttn(thread);
+HandleMark hm(thread);
+js = (_to_java_string_fn)(thread->jni_environment(), str);
+}
+return Handle(THREAD, JNIHandles::resolve(js));
+}
+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("java.lang.Class", 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("java.lang.Thread", _name_offset,      k, vmSymbols::name_name(),      vmSymbols::char_array_signature());
+COMPUTE_OFFSET("java.lang.Thread", _group_offset,     k, vmSymbols::group_name(),     vmSymbols::threadgroup_signature());
+COMPUTE_OFFSET("java.lang.Thread", _contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
+COMPUTE_OFFSET("java.lang.Thread", _inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
+COMPUTE_OFFSET("java.lang.Thread", _priority_offset,  k, vmSymbols::priority_name(),  vmSymbols::int_signature());
+COMPUTE_OFFSET("java.lang.Thread", _daemon_offset,    k, vmSymbols::daemon_name(),    vmSymbols::bool_signature());
+COMPUTE_OFFSET("java.lang.Thread", _eetop_offset,     k, vmSymbols::eetop_name(),     vmSymbols::long_signature());
+COMPUTE_OFFSET("java.lang.Thread", _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("java.lang.Thread", _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("java.lang.Thread", _tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
+COMPUTE_OPTIONAL_OFFSET("java.lang.Thread", _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("java.lang.Thread", _park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
+COMPUTE_OPTIONAL_OFFSET("java.lang.Thread", _park_event_offset, k, vmSymbols::park_event_name(),
+vmSymbols::long_signature());
+}
+JavaThread* java_lang_Thread::thread(oop java_thread) {
+return (JavaThread*) java_thread->obj_field(_eetop_offset);
+}
+void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
+// We are storing a JavaThread* (malloc'ed data) into a long field in the thread
+// object. The store has to be 64-bit wide so we use a pointer store, but we
+// cannot call oopDesc::obj_field_put since it includes a write barrier!
+oop* addr = java_thread->obj_field_addr(_eetop_offset);
+*addr = (oop) 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("java.lang.ThreadGroup", _parent_offset,      k, vmSymbols::parent_name(),      vmSymbols::threadgroup_signature());
+COMPUTE_OFFSET("java.lang.ThreadGroup", _name_offset,        k, vmSymbols::name_name(),        vmSymbols::string_signature());
+COMPUTE_OFFSET("java.lang.ThreadGroup", _threads_offset,     k, vmSymbols::threads_name(),     vmSymbols::thread_array_signature());
+COMPUTE_OFFSET("java.lang.ThreadGroup", _groups_offset,      k, vmSymbols::groups_name(),      vmSymbols::threadgroup_array_signature());
+COMPUTE_OFFSET("java.lang.ThreadGroup", _maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
+COMPUTE_OFFSET("java.lang.ThreadGroup", _destroyed_offset,   k, vmSymbols::destroyed_name(),   vmSymbols::bool_signature());
+COMPUTE_OFFSET("java.lang.ThreadGroup", _daemon_offset,      k, vmSymbols::daemon_name(),      vmSymbols::bool_signature());
+COMPUTE_OFFSET("java.lang.ThreadGroup", _vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
+COMPUTE_OFFSET("java.lang.ThreadGroup", _nthreads_offset,    k, vmSymbols::nthreads_name(),    vmSymbols::int_signature());
+COMPUTE_OFFSET("java.lang.ThreadGroup", _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;
+bool            _done;
+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) {
+expand(CHECK);
+_backtrace = _head;
+_index = 0;
+_dirty = false;
+_done = false;
+}
+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->obj_at_addr(0),
+_methods->length() * HeapWordsPerOop));
+_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);
+*_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();
+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("java.lang.reflect.AccessibleObject", 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("java.lang.reflect.Method", clazz_offset,          k, vmSymbols::clazz_name(),          vmSymbols::class_signature());
+COMPUTE_OFFSET("java.lang.reflect.Method", name_offset,           k, vmSymbols::name_name(),           vmSymbols::string_signature());
+COMPUTE_OFFSET("java.lang.reflect.Method", returnType_offset,     k, vmSymbols::returnType_name(),     vmSymbols::class_signature());
+COMPUTE_OFFSET("java.lang.reflect.Method", parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
+COMPUTE_OFFSET("java.lang.reflect.Method", exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
+COMPUTE_OFFSET("java.lang.reflect.Method", slot_offset,           k, vmSymbols::slot_name(),           vmSymbols::int_signature());
+COMPUTE_OFFSET("java.lang.reflect.Method", 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("java.lang.reflect.Method", signature_offset,             k, vmSymbols::signature_name(),             vmSymbols::string_signature());
+COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Method", annotations_offset,           k, vmSymbols::annotations_name(),           vmSymbols::byte_array_signature());
+COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Method", parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
+COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Method", 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("java.lang.reflect.Constructor", clazz_offset,          k, vmSymbols::clazz_name(),          vmSymbols::class_signature());
+COMPUTE_OFFSET("java.lang.reflect.Constructor", parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
+COMPUTE_OFFSET("java.lang.reflect.Constructor", exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
+COMPUTE_OFFSET("java.lang.reflect.Constructor", slot_offset,           k, vmSymbols::slot_name(),           vmSymbols::int_signature());
+COMPUTE_OFFSET("java.lang.reflect.Constructor", 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("java.lang.reflect.Constructor", signature_offset,             k, vmSymbols::signature_name(),             vmSymbols::string_signature());
+COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Constructor", annotations_offset,           k, vmSymbols::annotations_name(),           vmSymbols::byte_array_signature());
+COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Constructor", 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("java.lang.reflect.Field", clazz_offset,     k, vmSymbols::clazz_name(),     vmSymbols::class_signature());
+COMPUTE_OFFSET("java.lang.reflect.Field", name_offset,      k, vmSymbols::name_name(),      vmSymbols::string_signature());
+COMPUTE_OFFSET("java.lang.reflect.Field", type_offset,      k, vmSymbols::type_name(),      vmSymbols::class_signature());
+COMPUTE_OFFSET("java.lang.reflect.Field", slot_offset,      k, vmSymbols::slot_name(),      vmSymbols::int_signature());
+COMPUTE_OFFSET("java.lang.reflect.Field", 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("java.lang.reflect.Field", signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
+COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Field", 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("sun.reflect.ConstantPool", _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("sun.reflect.UnsafeStaticFieldAccessorImpl", _base_offset, k,
+vmSymbols::base_name(), vmSymbols::object_signature());
+}
+}
+oop java_lang_boxing_object::initialize_and_allocate(klassOop k, TRAPS) {
+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;
+switch (type) {
+case T_BOOLEAN:
+box = initialize_and_allocate(SystemDictionary::boolean_klass(), CHECK_0);
+box->bool_field_put(value_offset, value->z);
+break;
+case T_CHAR:
+box = initialize_and_allocate(SystemDictionary::char_klass(), CHECK_0);
+box->char_field_put(value_offset, value->c);
+break;
+case T_FLOAT:
+box = initialize_and_allocate(SystemDictionary::float_klass(), CHECK_0);
+box->float_field_put(value_offset, value->f);
+break;
+case T_DOUBLE:
+box = initialize_and_allocate(SystemDictionary::double_klass(), CHECK_0);
+box->double_field_put(value_offset, value->d);
+break;
+case T_BYTE:
+box = initialize_and_allocate(SystemDictionary::byte_klass(), CHECK_0);
+box->byte_field_put(value_offset, value->b);
+break;
+case T_SHORT:
+box = initialize_and_allocate(SystemDictionary::short_klass(), CHECK_0);
+box->short_field_put(value_offset, value->s);
+break;
+case T_INT:
+box = initialize_and_allocate(SystemDictionary::int_klass(), CHECK_0);
+box->int_field_put(value_offset, value->i);
+break;
+case T_LONG:
+box = initialize_and_allocate(SystemDictionary::long_klass(), CHECK_0);
+box->long_field_put(value_offset, value->j);
+break;
+default:
+return NULL;
+}
+return box;
+}
+BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
+klassOop k = box->klass();
+if (k == SystemDictionary::boolean_klass()) {
+value->z = box->bool_field(value_offset);
+return T_BOOLEAN;
+}
+if (k == SystemDictionary::char_klass()) {
+value->c = box->char_field(value_offset);
+return T_CHAR;
+}
+if (k == SystemDictionary::float_klass()) {
+value->f = box->float_field(value_offset);
+return T_FLOAT;
+}
+if (k == SystemDictionary::double_klass()) {
+value->d = box->double_field(value_offset);
+return T_DOUBLE;
+}
+if (k == SystemDictionary::byte_klass()) {
+value->b = box->byte_field(value_offset);
+return T_BYTE;
+}
+if (k == SystemDictionary::short_klass()) {
+value->s = box->short_field(value_offset);
+return T_SHORT;
+}
+if (k == SystemDictionary::int_klass()) {
+value->i = box->int_field(value_offset);
+return T_INT;
+}
+if (k == SystemDictionary::long_klass()) {
+value->j = box->long_field(value_offset);
+return T_LONG;
+}
+return T_ILLEGAL;
+}
+BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
+klassOop k = box->klass();
+if (k == SystemDictionary::boolean_klass()) {
+box->bool_field_put(value_offset, value->z);
+return T_BOOLEAN;
+}
+if (k == SystemDictionary::char_klass()) {
+box->char_field_put(value_offset, value->c);
+return T_CHAR;
+}
+if (k == SystemDictionary::float_klass()) {
+box->float_field_put(value_offset, value->f);
+return T_FLOAT;
+}
+if (k == SystemDictionary::double_klass()) {
+box->double_field_put(value_offset, value->d);
+return T_DOUBLE;
+}
+if (k == SystemDictionary::byte_klass()) {
+box->byte_field_put(value_offset, value->b);
+return T_BYTE;
+}
+if (k == SystemDictionary::short_klass()) {
+box->short_field_put(value_offset, value->s);
+return T_SHORT;
+}
+if (k == SystemDictionary::int_klass()) {
+box->int_field_put(value_offset, value->i);
+return T_INT;
+}
+if (k == SystemDictionary::long_klass()) {
+box->long_field_put(value_offset, value->j);
+return T_LONG;
+}
+return T_ILLEGAL;
+}
+// Support for java_lang_ref_Reference
+void java_lang_ref_Reference::set_referent(oop ref, oop value) {
+ref->obj_field_put(referent_offset, value);
+}
+oop* java_lang_ref_Reference::referent_addr(oop ref) {
+return ref->obj_field_addr(referent_offset);
+}
+void java_lang_ref_Reference::set_next(oop ref, oop value) {
+ref->obj_field_put(next_offset, value);
+}
+oop* java_lang_ref_Reference::next_addr(oop ref) {
+return ref->obj_field_addr(next_offset);
+}
+void java_lang_ref_Reference::set_discovered(oop ref, oop value) {
+ref->obj_field_put(discovered_offset, value);
+}
+oop* java_lang_ref_Reference::discovered_addr(oop ref) {
+return ref->obj_field_addr(discovered_offset);
+}
+oop* java_lang_ref_Reference::pending_list_lock_addr() {
+instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass());
+return (oop*)(((char *)ik->start_of_static_fields()) + static_lock_offset);
+}
+oop* java_lang_ref_Reference::pending_list_addr() {
+instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass());
+return (oop *)(((char *)ik->start_of_static_fields()) + static_pending_offset);
+}
+// 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();
+COMPUTE_OFFSET("java.nio.Buffer", _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("sun.misc.AtomicLongCSImpl", _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("java.util.concurrent.locks.AbstractOwnableSynchronizer", _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 = wordSize;
+const int header = instanceOopDesc::header_size_in_bytes();
+// 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;
+}
+}
+// 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)
+// 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 > hg > truffle

comparison src/share/vm/classfile/javaClasses.cpp @ 0:a61af66fc99e jdk7-b24