7017732: move static fields into Class to prepare for perm gen removal
Reviewed-by: kvn, coleenp, twisti, stefank
/*
* Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "classfile/javaClasses.hpp"
#include "classfile/symbolTable.hpp"
#include "classfile/vmSymbols.hpp"
#include "code/debugInfo.hpp"
#include "code/pcDesc.hpp"
#include "interpreter/interpreter.hpp"
#include "memory/oopFactory.hpp"
#include "memory/resourceArea.hpp"
#include "memory/universe.inline.hpp"
#include "oops/instanceKlass.hpp"
#include "oops/instanceMirrorKlass.hpp"
#include "oops/klass.hpp"
#include "oops/klassOop.hpp"
#include "oops/methodOop.hpp"
#include "oops/symbol.hpp"
#include "oops/typeArrayOop.hpp"
#include "runtime/fieldDescriptor.hpp"
#include "runtime/handles.inline.hpp"
#include "runtime/interfaceSupport.hpp"
#include "runtime/java.hpp"
#include "runtime/javaCalls.hpp"
#include "runtime/safepoint.hpp"
#include "runtime/vframe.hpp"
#include "utilities/preserveException.hpp"
#ifdef TARGET_OS_FAMILY_linux
# include "thread_linux.inline.hpp"
#endif
#ifdef TARGET_OS_FAMILY_solaris
# include "thread_solaris.inline.hpp"
#endif
#ifdef TARGET_OS_FAMILY_windows
# include "thread_windows.inline.hpp"
#endif
static bool find_field(instanceKlass* ik,
Symbol* name_symbol, Symbol* signature_symbol,
fieldDescriptor* fd,
bool allow_super = false) {
if (allow_super)
return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
else
return ik->find_local_field(name_symbol, signature_symbol, fd);
}
static bool find_hacked_field(instanceKlass* ik,
Symbol* name_symbol, Symbol* signature_symbol,
fieldDescriptor* fd,
bool allow_super = false) {
bool found = find_field(ik, name_symbol, signature_symbol, fd, allow_super);
if (!found && AllowTransitionalJSR292) {
Symbol* backup_sig = SystemDictionary::find_backup_signature(signature_symbol);
if (backup_sig != NULL) {
found = find_field(ik, name_symbol, backup_sig, fd, allow_super);
if (TraceMethodHandles) {
ResourceMark rm;
tty->print_cr("MethodHandles: %s.%s: backup for %s => %s%s",
ik->name()->as_C_string(), name_symbol->as_C_string(),
signature_symbol->as_C_string(), backup_sig->as_C_string(),
(found ? "" : " (NOT FOUND)"));
}
}
}
return found;
}
#define find_field find_hacked_field /* remove after AllowTransitionalJSR292 */
// Helpful routine for computing field offsets at run time rather than hardcoding them
static void
compute_offset(int &dest_offset,
klassOop klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
bool allow_super = false) {
fieldDescriptor fd;
instanceKlass* ik = instanceKlass::cast(klass_oop);
if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
ResourceMark rm;
tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
fatal("Invalid layout of preloaded class");
}
dest_offset = fd.offset();
}
// Same as above but for "optional" offsets that might not be present in certain JDK versions
static void
compute_optional_offset(int& dest_offset,
klassOop klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
bool allow_super = false) {
fieldDescriptor fd;
instanceKlass* ik = instanceKlass::cast(klass_oop);
if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
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(Symbol* 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, os::dll_lookup(lib_handle, "NewStringPlatform"));
if (_to_java_string_fn == NULL) {
fatal("NewStringPlatform missing");
}
}
jstring js = NULL;
{ JavaThread* thread = (JavaThread*)THREAD;
assert(thread->is_Java_thread(), "must be java thread");
HandleMark hm(thread);
ThreadToNativeFromVM ttn(thread);
js = (_to_java_string_fn)(thread->jni_environment(), str);
}
return Handle(THREAD, JNIHandles::resolve(js));
}
// Converts a Java String to a native C string that can be used for
// native OS calls.
char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
static to_platform_string_fn_t _to_platform_string_fn = NULL;
if (_to_platform_string_fn == NULL) {
void *lib_handle = os::native_java_library();
_to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
if (_to_platform_string_fn == NULL) {
fatal("GetStringPlatformChars missing");
}
}
char *native_platform_string;
{ JavaThread* thread = (JavaThread*)THREAD;
assert(thread->is_Java_thread(), "must be java thread");
JNIEnv *env = thread->jni_environment();
jstring js = (jstring) JNIHandles::make_local(env, java_string());
bool is_copy;
HandleMark hm(thread);
ThreadToNativeFromVM ttn(thread);
native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
assert(is_copy == JNI_TRUE, "is_copy value changed");
JNIHandles::destroy_local(js);
}
return native_platform_string;
}
Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
oop obj = java_string();
// Typical usage is to convert all '/' to '.' in string.
typeArrayOop value = java_lang_String::value(obj);
int offset = java_lang_String::offset(obj);
int length = java_lang_String::length(obj);
// First check if any from_char exist
int index; // Declared outside, used later
for (index = 0; index < length; index++) {
if (value->char_at(index + offset) == from_char) {
break;
}
}
if (index == length) {
// No from_char, so do not copy.
return java_string;
}
// Create new UNICODE buffer. Must handlize value because GC
// may happen during String and char array creation.
typeArrayHandle h_value(THREAD, value);
Handle string = basic_create(length, false, CHECK_NH);
typeArrayOop from_buffer = h_value();
typeArrayOop to_buffer = java_lang_String::value(string());
// Copy contents
for (index = 0; index < length; index++) {
jchar c = from_buffer->char_at(index + offset);
if (c == from_char) {
c = to_char;
}
to_buffer->char_at_put(index, c);
}
return string;
}
jchar* java_lang_String::as_unicode_string(oop java_string, int& length) {
typeArrayOop value = java_lang_String::value(java_string);
int offset = java_lang_String::offset(java_string);
length = java_lang_String::length(java_string);
jchar* result = NEW_RESOURCE_ARRAY(jchar, length);
for (int index = 0; index < length; index++) {
result[index] = value->char_at(index + offset);
}
return result;
}
Symbol* 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);
jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
return sym;
}
Symbol* java_lang_String::as_symbol_or_null(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* base = (length == 0) ? NULL : value->char_at_addr(offset);
return SymbolTable::probe_unicode(base, length);
}
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, char* buf, int buflen) {
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, buf, buflen);
}
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("\"");
}
}
static void initialize_static_field(fieldDescriptor* fd, TRAPS) {
Handle mirror (THREAD, fd->field_holder()->java_mirror());
assert(mirror.not_null() && fd->is_static(), "just checking");
if (fd->has_initial_value()) {
BasicType t = fd->field_type();
switch (t) {
case T_BYTE:
mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
break;
case T_BOOLEAN:
mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
break;
case T_CHAR:
mirror()->char_field_put(fd->offset(), fd->int_initial_value());
break;
case T_SHORT:
mirror()->short_field_put(fd->offset(), fd->int_initial_value());
break;
case T_INT:
mirror()->int_field_put(fd->offset(), fd->int_initial_value());
break;
case T_FLOAT:
mirror()->float_field_put(fd->offset(), fd->float_initial_value());
break;
case T_DOUBLE:
mirror()->double_field_put(fd->offset(), fd->double_initial_value());
break;
case T_LONG:
mirror()->long_field_put(fd->offset(), fd->long_initial_value());
break;
case T_OBJECT:
{
#ifdef ASSERT
TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
assert(fd->signature() == sym, "just checking");
#endif
oop string = fd->string_initial_value(CHECK);
mirror()->obj_field_put(fd->offset(), string);
}
break;
default:
THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
"Illegal ConstantValue attribute in class file");
}
}
}
// During bootstrap, java.lang.Class wasn't loaded so static field
// offsets were computed without the size added it. Go back and
// update all the static field offsets to included the size.
static void fixup_static_field(fieldDescriptor* fd, TRAPS) {
if (fd->is_static()) {
int real_offset = fd->offset() + instanceMirrorKlass::offset_of_static_fields();
typeArrayOop fields = instanceKlass::cast(fd->field_holder())->fields();
fields->short_at_put(fd->index() + instanceKlass::low_offset, extract_low_short_from_int(real_offset));
fields->short_at_put(fd->index() + instanceKlass::high_offset, extract_high_short_from_int(real_offset));
}
}
void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
assert(instanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
if (k->oop_is_instance()) {
// Fixup the offsets
instanceKlass::cast(k())->do_local_static_fields(&fixup_static_field, CHECK);
}
create_mirror(k, CHECK);
}
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() && (k->oop_is_instance() || k->oop_is_javaArray())) {
// Allocate mirror (java.lang.Class instance)
Handle mirror = instanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK_0);
// Setup indirections
mirror->obj_field_put(klass_offset, k());
k->set_java_mirror(mirror());
instanceMirrorKlass* mk = instanceMirrorKlass::cast(mirror->klass());
java_lang_Class::set_oop_size(mirror(), mk->instance_size(k));
java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(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());
}
} else if (k->oop_is_instance()) {
// Initialize static fields
instanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, CHECK_NULL);
}
return mirror();
} else {
return NULL;
}
}
int java_lang_Class::oop_size(oop java_class) {
assert(oop_size_offset != 0, "must be set");
return java_class->int_field(oop_size_offset);
}
void java_lang_Class::set_oop_size(oop java_class, int size) {
assert(oop_size_offset != 0, "must be set");
java_class->int_field_put(oop_size_offset, size);
}
int java_lang_Class::static_oop_field_count(oop java_class) {
assert(static_oop_field_count_offset != 0, "must be set");
return java_class->int_field(static_oop_field_count_offset);
}
void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
assert(static_oop_field_count_offset != 0, "must be set");
java_class->int_field_put(static_oop_field_count_offset, size);
}
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 = instanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance((oop)NULL, CHECK_0);
if (type != T_VOID) {
klassOop aklass = Universe::typeArrayKlassObj(type);
assert(aklass != NULL, "correct bootstrap");
set_array_klass(java_class, aklass);
}
instanceMirrorKlass* mk = instanceMirrorKlass::cast(SystemDictionary::Class_klass());
java_lang_Class::set_oop_size(java_class, mk->instance_size(oop(NULL)));
java_lang_Class::set_static_oop_field_count(java_class, 0);
return java_class;
}
klassOop java_lang_Class::as_klassOop(oop java_class) {
//%note memory_2
assert(java_lang_Class::is_instance(java_class), "must be a Class object");
klassOop k = klassOop(java_class->obj_field(klass_offset));
assert(k == NULL || k->is_klass(), "type check");
return k;
}
void java_lang_Class::print_signature(oop java_class, outputStream* st) {
assert(java_lang_Class::is_instance(java_class), "must be a Class object");
Symbol* name = NULL;
bool is_instance = false;
if (is_primitive(java_class)) {
name = vmSymbols::type_signature(primitive_type(java_class));
} else {
klassOop k = as_klassOop(java_class);
is_instance = Klass::cast(k)->oop_is_instance();
name = Klass::cast(k)->name();
}
if (name == NULL) {
st->print("<null>");
return;
}
if (is_instance) st->print("L");
st->write((char*) name->base(), (int) name->utf8_length());
if (is_instance) st->print(";");
}
Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
assert(java_lang_Class::is_instance(java_class), "must be a Class object");
Symbol* name;
if (is_primitive(java_class)) {
name = vmSymbols::type_signature(primitive_type(java_class));
// Because this can create a new symbol, the caller has to decrement
// the refcount, so make adjustment here and below for symbols returned
// that are not created or incremented due to a successful lookup.
name->increment_refcount();
} else {
klassOop k = as_klassOop(java_class);
if (!Klass::cast(k)->oop_is_instance()) {
name = Klass::cast(k)->name();
name->increment_refcount();
} else {
ResourceMark rm;
const char* sigstr = Klass::cast(k)->signature_name();
int siglen = (int) strlen(sigstr);
if (!intern_if_not_found) {
name = SymbolTable::probe(sigstr, siglen);
} else {
name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
}
}
}
return name;
}
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) {
// should assert:
//assert(java_lang_Class::is_instance(java_class), "must be a Class object");
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;
}
BasicType java_lang_Class::as_BasicType(oop java_class, klassOop* reference_klass) {
assert(java_lang_Class::is_instance(java_class), "must be a Class object");
if (is_primitive(java_class)) {
if (reference_klass != NULL)
(*reference_klass) = NULL;
return primitive_type(java_class);
} else {
if (reference_klass != NULL)
(*reference_klass) = as_klassOop(java_class);
return T_OBJECT;
}
}
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;
int java_lang_Class::parallelCapable_offset = -1;
void java_lang_Class::compute_offsets() {
assert(!offsets_computed, "offsets should be initialized only once");
offsets_computed = true;
klassOop k = SystemDictionary::Class_klass();
// The classRedefinedCount field is only present starting in 1.5,
// so don't go fatal.
compute_optional_offset(classRedefinedCount_offset,
k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
// The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
klassOop k1 = SystemDictionary::ClassLoader_klass();
compute_optional_offset(parallelCapable_offset,
k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
}
// For class loader classes, parallelCapable defined
// based on non-null field
// Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
bool java_lang_Class::parallelCapable(oop class_loader) {
if (!JDK_Version::is_gte_jdk17x_version()
|| parallelCapable_offset == -1) {
// Default for backward compatibility is false
return false;
}
return (class_loader->obj_field(parallelCapable_offset) != NULL);
}
int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
if (!JDK_Version::is_gte_jdk15x_version()
|| classRedefinedCount_offset == -1) {
// The classRedefinedCount field is only present starting in 1.5.
// If we don't have an offset for it then just return -1 as a marker.
return -1;
}
return the_class_mirror->int_field(classRedefinedCount_offset);
}
void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
if (!JDK_Version::is_gte_jdk15x_version()
|| classRedefinedCount_offset == -1) {
// The classRedefinedCount field is only present starting in 1.5.
// If we don't have an offset for it then nothing to set.
return;
}
the_class_mirror->int_field_put(classRedefinedCount_offset, value);
}
// Note: JDK1.1 and before had a privateInfo_offset field which was used for the
// platform thread structure, and a eetop offset which was used for thread
// local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
// merged, so in the HotSpot VM we just use the eetop field for the thread
// instead of the privateInfo_offset.
//
// Note: The stackSize field is only present starting in 1.4.
int java_lang_Thread::_name_offset = 0;
int java_lang_Thread::_group_offset = 0;
int java_lang_Thread::_contextClassLoader_offset = 0;
int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
int java_lang_Thread::_priority_offset = 0;
int java_lang_Thread::_eetop_offset = 0;
int java_lang_Thread::_daemon_offset = 0;
int java_lang_Thread::_stillborn_offset = 0;
int java_lang_Thread::_stackSize_offset = 0;
int java_lang_Thread::_tid_offset = 0;
int java_lang_Thread::_thread_status_offset = 0;
int java_lang_Thread::_park_blocker_offset = 0;
int java_lang_Thread::_park_event_offset = 0 ;
void java_lang_Thread::compute_offsets() {
assert(_group_offset == 0, "offsets should be initialized only once");
klassOop k = SystemDictionary::Thread_klass();
compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
// The stackSize field is only present starting in 1.4, so don't go fatal.
compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
// The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
// The parkBlocker field is only present starting in 1.6, so don't go fatal.
compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
vmSymbols::long_signature());
}
JavaThread* java_lang_Thread::thread(oop java_thread) {
return (JavaThread*)java_thread->address_field(_eetop_offset);
}
void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
java_thread->address_field_put(_eetop_offset, (address)thread);
}
typeArrayOop java_lang_Thread::name(oop java_thread) {
oop name = java_thread->obj_field(_name_offset);
assert(name == NULL || (name->is_typeArray() && typeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
return typeArrayOop(name);
}
void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
java_thread->obj_field_put(_name_offset, name);
}
ThreadPriority java_lang_Thread::priority(oop java_thread) {
return (ThreadPriority)java_thread->int_field(_priority_offset);
}
void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
java_thread->int_field_put(_priority_offset, priority);
}
oop java_lang_Thread::threadGroup(oop java_thread) {
return java_thread->obj_field(_group_offset);
}
bool java_lang_Thread::is_stillborn(oop java_thread) {
return java_thread->bool_field(_stillborn_offset) != 0;
}
// We never have reason to turn the stillborn bit off
void java_lang_Thread::set_stillborn(oop java_thread) {
java_thread->bool_field_put(_stillborn_offset, true);
}
bool java_lang_Thread::is_alive(oop java_thread) {
JavaThread* thr = java_lang_Thread::thread(java_thread);
return (thr != NULL);
}
bool java_lang_Thread::is_daemon(oop java_thread) {
return java_thread->bool_field(_daemon_offset) != 0;
}
void java_lang_Thread::set_daemon(oop java_thread) {
java_thread->bool_field_put(_daemon_offset, true);
}
oop java_lang_Thread::context_class_loader(oop java_thread) {
return java_thread->obj_field(_contextClassLoader_offset);
}
oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
return java_thread->obj_field(_inheritedAccessControlContext_offset);
}
jlong java_lang_Thread::stackSize(oop java_thread) {
// The stackSize field is only present starting in 1.4
if (_stackSize_offset > 0) {
assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
return java_thread->long_field(_stackSize_offset);
} else {
return 0;
}
}
// Write the thread status value to threadStatus field in java.lang.Thread java class.
void java_lang_Thread::set_thread_status(oop java_thread,
java_lang_Thread::ThreadStatus status) {
assert(JavaThread::current()->thread_state() == _thread_in_vm, "Java Thread is not running in vm");
// The threadStatus is only present starting in 1.5
if (_thread_status_offset > 0) {
java_thread->int_field_put(_thread_status_offset, status);
}
}
// Read thread status value from threadStatus field in java.lang.Thread java class.
java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
assert(Thread::current()->is_VM_thread() ||
JavaThread::current()->thread_state() == _thread_in_vm,
"Java Thread is not running in vm");
// The threadStatus is only present starting in 1.5
if (_thread_status_offset > 0) {
return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
} else {
// All we can easily figure out is if it is alive, but that is
// enough info for a valid unknown status.
// These aren't restricted to valid set ThreadStatus values, so
// use JVMTI values and cast.
JavaThread* thr = java_lang_Thread::thread(java_thread);
if (thr == NULL) {
// the thread hasn't run yet or is in the process of exiting
return NEW;
}
return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
}
}
jlong java_lang_Thread::thread_id(oop java_thread) {
// The thread ID field is only present starting in 1.5
if (_tid_offset > 0) {
return java_thread->long_field(_tid_offset);
} else {
return 0;
}
}
oop java_lang_Thread::park_blocker(oop java_thread) {
assert(JDK_Version::current().supports_thread_park_blocker() &&
_park_blocker_offset != 0, "Must support parkBlocker field");
if (_park_blocker_offset > 0) {
return java_thread->obj_field(_park_blocker_offset);
}
return NULL;
}
jlong java_lang_Thread::park_event(oop java_thread) {
if (_park_event_offset > 0) {
return java_thread->long_field(_park_event_offset);
}
return 0;
}
bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
if (_park_event_offset > 0) {
java_thread->long_field_put(_park_event_offset, ptr);
return true;
}
return false;
}
const char* java_lang_Thread::thread_status_name(oop java_thread) {
assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
switch (status) {
case NEW : return "NEW";
case RUNNABLE : return "RUNNABLE";
case SLEEPING : return "TIMED_WAITING (sleeping)";
case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
case PARKED : return "WAITING (parking)";
case PARKED_TIMED : return "TIMED_WAITING (parking)";
case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
case TERMINATED : return "TERMINATED";
default : return "UNKNOWN";
};
}
int java_lang_ThreadGroup::_parent_offset = 0;
int java_lang_ThreadGroup::_name_offset = 0;
int java_lang_ThreadGroup::_threads_offset = 0;
int java_lang_ThreadGroup::_groups_offset = 0;
int java_lang_ThreadGroup::_maxPriority_offset = 0;
int java_lang_ThreadGroup::_destroyed_offset = 0;
int java_lang_ThreadGroup::_daemon_offset = 0;
int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
int java_lang_ThreadGroup::_nthreads_offset = 0;
int java_lang_ThreadGroup::_ngroups_offset = 0;
oop java_lang_ThreadGroup::parent(oop java_thread_group) {
assert(java_thread_group->is_oop(), "thread group must be oop");
return java_thread_group->obj_field(_parent_offset);
}
// ("name as oop" accessor is not necessary)
typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
oop name = java_thread_group->obj_field(_name_offset);
// ThreadGroup.name can be null
return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
}
int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
assert(java_thread_group->is_oop(), "thread group must be oop");
return java_thread_group->int_field(_nthreads_offset);
}
objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
oop threads = java_thread_group->obj_field(_threads_offset);
assert(threads != NULL, "threadgroups should have threads");
assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
return objArrayOop(threads);
}
int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
assert(java_thread_group->is_oop(), "thread group must be oop");
return java_thread_group->int_field(_ngroups_offset);
}
objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
oop groups = java_thread_group->obj_field(_groups_offset);
assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
return objArrayOop(groups);
}
ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
assert(java_thread_group->is_oop(), "thread group must be oop");
return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
}
bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
assert(java_thread_group->is_oop(), "thread group must be oop");
return java_thread_group->bool_field(_destroyed_offset) != 0;
}
bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
assert(java_thread_group->is_oop(), "thread group must be oop");
return java_thread_group->bool_field(_daemon_offset) != 0;
}
bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
assert(java_thread_group->is_oop(), "thread group must be oop");
return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
}
void java_lang_ThreadGroup::compute_offsets() {
assert(_parent_offset == 0, "offsets should be initialized only once");
klassOop k = SystemDictionary::ThreadGroup_klass();
compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
}
oop java_lang_Throwable::backtrace(oop throwable) {
return throwable->obj_field_acquire(backtrace_offset);
}
void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
throwable->release_obj_field_put(backtrace_offset, value);
}
oop java_lang_Throwable::message(oop throwable) {
return throwable->obj_field(detailMessage_offset);
}
oop java_lang_Throwable::message(Handle throwable) {
return throwable->obj_field(detailMessage_offset);
}
void java_lang_Throwable::set_message(oop throwable, oop value) {
throwable->obj_field_put(detailMessage_offset, value);
}
void java_lang_Throwable::clear_stacktrace(oop throwable) {
assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
throwable->obj_field_put(stackTrace_offset, NULL);
}
void java_lang_Throwable::print(oop throwable, outputStream* st) {
ResourceMark rm;
klassOop k = throwable->klass();
assert(k != NULL, "just checking");
st->print("%s", instanceKlass::cast(k)->external_name());
oop msg = message(throwable);
if (msg != NULL) {
st->print(": %s", java_lang_String::as_utf8_string(msg));
}
}
void java_lang_Throwable::print(Handle throwable, outputStream* st) {
ResourceMark rm;
klassOop k = throwable->klass();
assert(k != NULL, "just checking");
st->print("%s", instanceKlass::cast(k)->external_name());
oop msg = message(throwable);
if (msg != NULL) {
st->print(": %s", java_lang_String::as_utf8_string(msg));
}
}
// Print stack trace element to resource allocated buffer
char* java_lang_Throwable::print_stack_element_to_buffer(methodOop method, int bci) {
// Get strings and string lengths
instanceKlass* klass = instanceKlass::cast(method->method_holder());
const char* klass_name = klass->external_name();
int buf_len = (int)strlen(klass_name);
char* source_file_name;
if (klass->source_file_name() == NULL) {
source_file_name = NULL;
} else {
source_file_name = klass->source_file_name()->as_C_string();
buf_len += (int)strlen(source_file_name);
}
char* method_name = method->name()->as_C_string();
buf_len += (int)strlen(method_name);
// Allocate temporary buffer with extra space for formatting and line number
char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
// Print stack trace line in buffer
sprintf(buf, "\tat %s.%s", klass_name, method_name);
if (method->is_native()) {
strcat(buf, "(Native Method)");
} else {
int line_number = method->line_number_from_bci(bci);
if (source_file_name != NULL && (line_number != -1)) {
// Sourcename and linenumber
sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
} else if (source_file_name != NULL) {
// Just sourcename
sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
} else {
// Neither soucename and linenumber
sprintf(buf + (int)strlen(buf), "(Unknown Source)");
}
nmethod* nm = method->code();
if (WizardMode && nm != NULL) {
sprintf(buf + (int)strlen(buf), "(nmethod " PTR_FORMAT ")", (intptr_t)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()),
vmSymbols::println_name(),
vmSymbols::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()),
vmSymbols::getCause_name(),
vmSymbols::void_throwable_signature(),
THREAD);
// Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
if (HAS_PENDING_EXCEPTION) {
CLEAR_PENDING_EXCEPTION;
h_throwable = Handle();
} else {
h_throwable = Handle(THREAD, (oop) result.get_jobject());
if (h_throwable.not_null()) {
st->print("Caused by: ");
print(h_throwable, st);
st->cr();
}
}
}
}
}
void java_lang_Throwable::print_stack_trace(oop throwable, oop print_stream) {
// Note: this is no longer used in Merlin, but we support it for compatibility.
Thread *thread = Thread::current();
Handle stream(thread, print_stream);
objArrayHandle result (thread, objArrayOop(backtrace(throwable)));
if (result.is_null()) {
print_to_stream(stream, no_stack_trace_message());
return;
}
while (result.not_null()) {
objArrayHandle methods (thread,
objArrayOop(result->obj_at(trace_methods_offset)));
typeArrayHandle bcis (thread,
typeArrayOop(result->obj_at(trace_bcis_offset)));
if (methods.is_null() || bcis.is_null()) {
print_to_stream(stream, no_stack_trace_message());
return;
}
int length = methods()->length();
for (int index = 0; index < length; index++) {
methodOop method = methodOop(methods()->obj_at(index));
if (method == NULL) return;
int bci = bcis->ushort_at(index);
print_stack_element(stream, method, bci);
}
result = objArrayHandle(thread, objArrayOop(result->obj_at(trace_next_offset)));
}
}
// This class provides a simple wrapper over the internal structure of
// exception backtrace to insulate users of the backtrace from needing
// to know what it looks like.
class BacktraceBuilder: public StackObj {
private:
Handle _backtrace;
objArrayOop _head;
objArrayOop _methods;
typeArrayOop _bcis;
int _index;
bool _dirty;
No_Safepoint_Verifier _nsv;
public:
enum {
trace_methods_offset = java_lang_Throwable::trace_methods_offset,
trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
trace_next_offset = java_lang_Throwable::trace_next_offset,
trace_size = java_lang_Throwable::trace_size,
trace_chunk_size = java_lang_Throwable::trace_chunk_size
};
// constructor for new backtrace
BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _dirty(false) {
expand(CHECK);
_backtrace = _head;
_index = 0;
}
void flush() {
// The following appears to have been an optimization to save from
// doing a barrier for each individual store into the _methods array,
// but rather to do it for the entire array after the series of writes.
// That optimization seems to have been lost when compressed oops was
// implemented. However, the extra card-marks below was left in place,
// but is now redundant because the individual stores into the
// _methods array already execute the barrier code. CR 6918185 has
// been filed so the original code may be restored by deferring the
// barriers until after the entire sequence of stores, thus re-enabling
// the intent of the original optimization. In the meantime the redundant
// card mark below is now disabled.
if (_dirty && _methods != NULL) {
#if 0
BarrierSet* bs = Universe::heap()->barrier_set();
assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
bs->write_ref_array((HeapWord*)_methods->base(), _methods->length());
#endif
_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);
_bcis->ushort_at_put(_index, bci);
_index++;
_dirty = true;
}
methodOop current_method() {
assert(_index >= 0 && _index < trace_chunk_size, "out of range");
return methodOop(_methods->obj_at(_index));
}
jushort current_bci() {
assert(_index >= 0 && _index < trace_chunk_size, "out of range");
return _bcis->ushort_at(_index);
}
};
void java_lang_Throwable::fill_in_stack_trace(Handle throwable, TRAPS) {
if (!StackTraceInThrowable) return;
ResourceMark rm(THREAD);
// Start out by clearing the backtrace for this object, in case the VM
// runs out of memory while allocating the stack trace
set_backtrace(throwable(), NULL);
if (JDK_Version::is_gte_jdk14x_version()) {
// New since 1.4, clear lazily constructed Java level stacktrace if
// refilling occurs
clear_stacktrace(throwable());
}
int max_depth = MaxJavaStackTraceDepth;
JavaThread* thread = (JavaThread*)THREAD;
BacktraceBuilder bt(CHECK);
// Instead of using vframe directly, this version of fill_in_stack_trace
// basically handles everything by hand. This significantly improved the
// speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
// See bug 6333838 for more details.
// The "ASSERT" here is to verify this method generates the exactly same stack
// trace as utilizing vframe.
#ifdef ASSERT
vframeStream st(thread);
methodHandle st_method(THREAD, st.method());
#endif
int total_count = 0;
RegisterMap map(thread, false);
int decode_offset = 0;
nmethod* nm = NULL;
bool skip_fillInStackTrace_check = false;
bool skip_throwableInit_check = false;
for (frame fr = thread->last_frame(); max_depth != total_count;) {
methodOop method = NULL;
int bci = 0;
// Compiled java method case.
if (decode_offset != 0) {
DebugInfoReadStream stream(nm, decode_offset);
decode_offset = stream.read_int();
method = (methodOop)nm->oop_at(stream.read_int());
bci = stream.read_bci();
} else {
if (fr.is_first_frame()) break;
address pc = fr.pc();
if (fr.is_interpreted_frame()) {
intptr_t bcx = fr.interpreter_frame_bcx();
method = fr.interpreter_frame_method();
bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
fr = fr.sender(&map);
} else {
CodeBlob* cb = fr.cb();
// HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
// but non nmethod
fr = fr.sender(&map);
if (cb == NULL || !cb->is_nmethod()) {
continue;
}
nm = (nmethod*)cb;
if (nm->method()->is_native()) {
method = nm->method();
bci = 0;
} else {
PcDesc* pd = nm->pc_desc_at(pc);
decode_offset = pd->scope_decode_offset();
// if decode_offset is not equal to 0, it will execute the
// "compiled java method case" at the beginning of the loop.
continue;
}
}
}
#ifdef ASSERT
assert(st_method() == method && st.bci() == bci,
"Wrong stack trace");
st.next();
// vframeStream::method isn't GC-safe so store off a copy
// of the methodOop in case we GC.
if (!st.at_end()) {
st_method = st.method();
}
#endif
if (!skip_fillInStackTrace_check) {
// check "fillInStackTrace" only once, so we negate the flag
// after the first time check.
skip_fillInStackTrace_check = true;
if (method->name() == vmSymbols::fillInStackTrace_name()) {
continue;
}
}
// skip <init> methods of the exceptions klass. If there is <init> methods
// that belongs to a superclass of the exception we are going to skipping
// them in stack trace. This is simlar to classic VM.
if (!skip_throwableInit_check) {
if (method->name() == vmSymbols::object_initializer_name() &&
throwable->is_a(method->method_holder())) {
continue;
} else {
// if no "Throwable.init()" method found, we stop checking it next time.
skip_throwableInit_check = true;
}
}
bt.push(method, bci, CHECK);
total_count++;
}
// Put completed stack trace into throwable object
set_backtrace(throwable(), bt.backtrace());
}
void java_lang_Throwable::fill_in_stack_trace(Handle throwable) {
// No-op if stack trace is disabled
if (!StackTraceInThrowable) {
return;
}
// Disable stack traces for some preallocated out of memory errors
if (!Universe::should_fill_in_stack_trace(throwable)) {
return;
}
PRESERVE_EXCEPTION_MARK;
JavaThread* thread = JavaThread::active();
fill_in_stack_trace(throwable, thread);
// ignore exceptions thrown during stack trace filling
CLEAR_PENDING_EXCEPTION;
}
void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
// Allocate stack trace - backtrace is created but not filled in
// No-op if stack trace is disabled
if (!StackTraceInThrowable) return;
objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK);
objArrayHandle backtrace (THREAD, h_oop);
objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK);
objArrayHandle methods (THREAD, m_oop);
typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK);
typeArrayHandle bcis(THREAD, b);
// backtrace has space for one chunk (next is NULL)
backtrace->obj_at_put(trace_methods_offset, methods());
backtrace->obj_at_put(trace_bcis_offset, bcis());
set_backtrace(throwable(), backtrace());
}
void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
// Fill in stack trace into preallocated backtrace (no GC)
// No-op if stack trace is disabled
if (!StackTraceInThrowable) return;
assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
oop backtrace = java_lang_Throwable::backtrace(throwable());
assert(backtrace != NULL, "backtrace not preallocated");
oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset);
objArrayOop methods = objArrayOop(m);
assert(methods != NULL && methods->length() > 0, "method array not preallocated");
oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset);
typeArrayOop bcis = typeArrayOop(b);
assert(bcis != NULL, "bci array not preallocated");
assert(methods->length() == bcis->length(), "method and bci arrays should match");
JavaThread* thread = JavaThread::current();
ResourceMark rm(thread);
vframeStream st(thread);
// Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
// methods as preallocated errors aren't created by "java" code.
// fill in as much stack trace as possible
int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
int chunk_count = 0;
for (;!st.at_end(); st.next()) {
// add element
bcis->ushort_at_put(chunk_count, st.bci());
methods->obj_at_put(chunk_count, st.method());
chunk_count++;
// Bail-out for deep stacks
if (chunk_count >= max_chunks) break;
}
}
int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
if (throwable == NULL) {
THROW_0(vmSymbols::java_lang_NullPointerException());
}
objArrayOop chunk = objArrayOop(backtrace(throwable));
int depth = 0;
if (chunk != NULL) {
// Iterate over chunks and count full ones
while (true) {
objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
if (next == NULL) break;
depth += trace_chunk_size;
chunk = next;
}
assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
// Count element in remaining partial chunk
objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
assert(methods != NULL && bcis != NULL, "sanity check");
for (int i = 0; i < methods->length(); i++) {
if (methods->obj_at(i) == NULL) break;
depth++;
}
}
return depth;
}
oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
if (throwable == NULL) {
THROW_0(vmSymbols::java_lang_NullPointerException());
}
if (index < 0) {
THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
}
// Compute how many chunks to skip and index into actual chunk
objArrayOop chunk = objArrayOop(backtrace(throwable));
int skip_chunks = index / trace_chunk_size;
int chunk_index = index % trace_chunk_size;
while (chunk != NULL && skip_chunks > 0) {
chunk = objArrayOop(chunk->obj_at(trace_next_offset));
skip_chunks--;
}
if (chunk == NULL) {
THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
}
// Get method,bci from chunk
objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset));
typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
assert(methods != NULL && bcis != NULL, "sanity check");
methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index)));
int bci = bcis->ushort_at(chunk_index);
// Chunk can be partial full
if (method.is_null()) {
THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
}
oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0);
return element;
}
oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
// SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs
assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
// Allocate java.lang.StackTraceElement instance
klassOop k = SystemDictionary::StackTraceElement_klass();
assert(k != NULL, "must be loaded in 1.4+");
instanceKlassHandle ik (THREAD, k);
if (ik->should_be_initialized()) {
ik->initialize(CHECK_0);
}
Handle element = ik->allocate_instance_handle(CHECK_0);
// Fill in class name
ResourceMark rm(THREAD);
const char* str = instanceKlass::cast(method->method_holder())->external_name();
oop classname = StringTable::intern((char*) str, CHECK_0);
java_lang_StackTraceElement::set_declaringClass(element(), classname);
// Fill in method name
oop methodname = StringTable::intern(method->name(), CHECK_0);
java_lang_StackTraceElement::set_methodName(element(), methodname);
// Fill in source file name
Symbol* 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_AccessibleObject_klass();
compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
}
jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
return (jboolean) reflect->bool_field(override_offset);
}
void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
reflect->bool_field_put(override_offset, (int) value);
}
void java_lang_reflect_Method::compute_offsets() {
klassOop k = SystemDictionary::reflect_Method_klass();
compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
// The generic signature and annotations fields are only present in 1.5
signature_offset = -1;
annotations_offset = -1;
parameter_annotations_offset = -1;
annotation_default_offset = -1;
compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
}
Handle java_lang_reflect_Method::create(TRAPS) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
klassOop klass = SystemDictionary::reflect_Method_klass();
// This class is eagerly initialized during VM initialization, since we keep a refence
// to one of the methods
assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized");
return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
}
oop java_lang_reflect_Method::clazz(oop reflect) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
return reflect->obj_field(clazz_offset);
}
void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
reflect->obj_field_put(clazz_offset, value);
}
int java_lang_reflect_Method::slot(oop reflect) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
return reflect->int_field(slot_offset);
}
void java_lang_reflect_Method::set_slot(oop reflect, int value) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
reflect->int_field_put(slot_offset, value);
}
oop java_lang_reflect_Method::name(oop method) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
return method->obj_field(name_offset);
}
void java_lang_reflect_Method::set_name(oop method, oop value) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
method->obj_field_put(name_offset, value);
}
oop java_lang_reflect_Method::return_type(oop method) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
return method->obj_field(returnType_offset);
}
void java_lang_reflect_Method::set_return_type(oop method, oop value) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
method->obj_field_put(returnType_offset, value);
}
oop java_lang_reflect_Method::parameter_types(oop method) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
return method->obj_field(parameterTypes_offset);
}
void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
method->obj_field_put(parameterTypes_offset, value);
}
oop java_lang_reflect_Method::exception_types(oop method) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
return method->obj_field(exceptionTypes_offset);
}
void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
method->obj_field_put(exceptionTypes_offset, value);
}
int java_lang_reflect_Method::modifiers(oop method) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
return method->int_field(modifiers_offset);
}
void java_lang_reflect_Method::set_modifiers(oop method, int value) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
method->int_field_put(modifiers_offset, value);
}
bool java_lang_reflect_Method::has_signature_field() {
return (signature_offset >= 0);
}
oop java_lang_reflect_Method::signature(oop method) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
assert(has_signature_field(), "signature field must be present");
return method->obj_field(signature_offset);
}
void java_lang_reflect_Method::set_signature(oop method, oop value) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
assert(has_signature_field(), "signature field must be present");
method->obj_field_put(signature_offset, value);
}
bool java_lang_reflect_Method::has_annotations_field() {
return (annotations_offset >= 0);
}
oop java_lang_reflect_Method::annotations(oop method) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
assert(has_annotations_field(), "annotations field must be present");
return method->obj_field(annotations_offset);
}
void java_lang_reflect_Method::set_annotations(oop method, oop value) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
assert(has_annotations_field(), "annotations field must be present");
method->obj_field_put(annotations_offset, value);
}
bool java_lang_reflect_Method::has_parameter_annotations_field() {
return (parameter_annotations_offset >= 0);
}
oop java_lang_reflect_Method::parameter_annotations(oop method) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
assert(has_parameter_annotations_field(), "parameter annotations field must be present");
return method->obj_field(parameter_annotations_offset);
}
void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
assert(has_parameter_annotations_field(), "parameter annotations field must be present");
method->obj_field_put(parameter_annotations_offset, value);
}
bool java_lang_reflect_Method::has_annotation_default_field() {
return (annotation_default_offset >= 0);
}
oop java_lang_reflect_Method::annotation_default(oop method) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
assert(has_annotation_default_field(), "annotation default field must be present");
return method->obj_field(annotation_default_offset);
}
void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
assert(has_annotation_default_field(), "annotation default field must be present");
method->obj_field_put(annotation_default_offset, value);
}
void java_lang_reflect_Constructor::compute_offsets() {
klassOop k = SystemDictionary::reflect_Constructor_klass();
compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
// The generic signature and annotations fields are only present in 1.5
signature_offset = -1;
annotations_offset = -1;
parameter_annotations_offset = -1;
compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
}
Handle java_lang_reflect_Constructor::create(TRAPS) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
Symbol* name = vmSymbols::java_lang_reflect_Constructor();
klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
instanceKlassHandle klass (THREAD, k);
// Ensure it is initialized
klass->initialize(CHECK_NH);
return klass->allocate_instance_handle(CHECK_NH);
}
oop java_lang_reflect_Constructor::clazz(oop reflect) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
return reflect->obj_field(clazz_offset);
}
void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
reflect->obj_field_put(clazz_offset, value);
}
oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
return constructor->obj_field(parameterTypes_offset);
}
void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
constructor->obj_field_put(parameterTypes_offset, value);
}
oop java_lang_reflect_Constructor::exception_types(oop constructor) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
return constructor->obj_field(exceptionTypes_offset);
}
void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
constructor->obj_field_put(exceptionTypes_offset, value);
}
int java_lang_reflect_Constructor::slot(oop reflect) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
return reflect->int_field(slot_offset);
}
void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
reflect->int_field_put(slot_offset, value);
}
int java_lang_reflect_Constructor::modifiers(oop constructor) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
return constructor->int_field(modifiers_offset);
}
void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
constructor->int_field_put(modifiers_offset, value);
}
bool java_lang_reflect_Constructor::has_signature_field() {
return (signature_offset >= 0);
}
oop java_lang_reflect_Constructor::signature(oop constructor) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
assert(has_signature_field(), "signature field must be present");
return constructor->obj_field(signature_offset);
}
void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
assert(has_signature_field(), "signature field must be present");
constructor->obj_field_put(signature_offset, value);
}
bool java_lang_reflect_Constructor::has_annotations_field() {
return (annotations_offset >= 0);
}
oop java_lang_reflect_Constructor::annotations(oop constructor) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
assert(has_annotations_field(), "annotations field must be present");
return constructor->obj_field(annotations_offset);
}
void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
assert(has_annotations_field(), "annotations field must be present");
constructor->obj_field_put(annotations_offset, value);
}
bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
return (parameter_annotations_offset >= 0);
}
oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
assert(has_parameter_annotations_field(), "parameter annotations field must be present");
return method->obj_field(parameter_annotations_offset);
}
void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
assert(has_parameter_annotations_field(), "parameter annotations field must be present");
method->obj_field_put(parameter_annotations_offset, value);
}
void java_lang_reflect_Field::compute_offsets() {
klassOop k = SystemDictionary::reflect_Field_klass();
compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
// The generic signature and annotations fields are only present in 1.5
signature_offset = -1;
annotations_offset = -1;
compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
}
Handle java_lang_reflect_Field::create(TRAPS) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
Symbol* name = vmSymbols::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_ConstantPool_klass();
// This null test can be removed post beta
if (k != NULL) {
compute_offset(_cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature());
}
}
Handle sun_reflect_ConstantPool::create(TRAPS) {
assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
klassOop k = SystemDictionary::reflect_ConstantPool_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_UnsafeStaticFieldAccessorImpl_klass();
// This null test can be removed post beta
if (k != NULL) {
compute_offset(_base_offset, k,
vmSymbols::base_name(), vmSymbols::object_signature());
}
}
oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
klassOop k = SystemDictionary::box_klass(type);
if (k == NULL) return NULL;
instanceKlassHandle h (THREAD, k);
if (!h->is_initialized()) h->initialize(CHECK_0);
return h->allocate_instance(THREAD);
}
oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
oop box = initialize_and_allocate(type, CHECK_0);
if (box == NULL) return NULL;
switch (type) {
case T_BOOLEAN:
box->bool_field_put(value_offset, value->z);
break;
case T_CHAR:
box->char_field_put(value_offset, value->c);
break;
case T_FLOAT:
box->float_field_put(value_offset, value->f);
break;
case T_DOUBLE:
box->double_field_put(long_value_offset, value->d);
break;
case T_BYTE:
box->byte_field_put(value_offset, value->b);
break;
case T_SHORT:
box->short_field_put(value_offset, value->s);
break;
case T_INT:
box->int_field_put(value_offset, value->i);
break;
case T_LONG:
box->long_field_put(long_value_offset, value->j);
break;
default:
return NULL;
}
return box;
}
BasicType java_lang_boxing_object::basic_type(oop box) {
if (box == NULL) return T_ILLEGAL;
BasicType type = SystemDictionary::box_klass_type(box->klass());
if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
return T_ILLEGAL;
return type;
}
BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
BasicType type = SystemDictionary::box_klass_type(box->klass());
switch (type) {
case T_BOOLEAN:
value->z = box->bool_field(value_offset);
break;
case T_CHAR:
value->c = box->char_field(value_offset);
break;
case T_FLOAT:
value->f = box->float_field(value_offset);
break;
case T_DOUBLE:
value->d = box->double_field(long_value_offset);
break;
case T_BYTE:
value->b = box->byte_field(value_offset);
break;
case T_SHORT:
value->s = box->short_field(value_offset);
break;
case T_INT:
value->i = box->int_field(value_offset);
break;
case T_LONG:
value->j = box->long_field(long_value_offset);
break;
default:
return T_ILLEGAL;
} // end switch
return type;
}
BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
BasicType type = SystemDictionary::box_klass_type(box->klass());
switch (type) {
case T_BOOLEAN:
box->bool_field_put(value_offset, value->z);
break;
case T_CHAR:
box->char_field_put(value_offset, value->c);
break;
case T_FLOAT:
box->float_field_put(value_offset, value->f);
break;
case T_DOUBLE:
box->double_field_put(long_value_offset, value->d);
break;
case T_BYTE:
box->byte_field_put(value_offset, value->b);
break;
case T_SHORT:
box->short_field_put(value_offset, value->s);
break;
case T_INT:
box->int_field_put(value_offset, value->i);
break;
case T_LONG:
box->long_field_put(long_value_offset, value->j);
break;
default:
return T_ILLEGAL;
} // end switch
return type;
}
void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
switch (type) {
case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
case T_CHAR: st->print("%d", value->c); break;
case T_BYTE: st->print("%d", value->b); break;
case T_SHORT: st->print("%d", value->s); break;
case T_INT: st->print("%d", value->i); break;
case T_LONG: st->print(INT64_FORMAT, value->j); break;
case T_FLOAT: st->print("%f", value->f); break;
case T_DOUBLE: st->print("%lf", value->d); break;
default: st->print("type %d?", type); break;
}
}
// Support for java_lang_ref_Reference
oop java_lang_ref_Reference::pending_list_lock() {
instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass());
address addr = ik->static_field_addr(static_lock_offset);
if (UseCompressedOops) {
return oopDesc::load_decode_heap_oop((narrowOop *)addr);
} else {
return oopDesc::load_decode_heap_oop((oop*)addr);
}
}
HeapWord *java_lang_ref_Reference::pending_list_addr() {
instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass());
address addr = ik->static_field_addr(static_pending_offset);
// XXX This might not be HeapWord aligned, almost rather be char *.
return (HeapWord*)addr;
}
oop java_lang_ref_Reference::pending_list() {
char *addr = (char *)pending_list_addr();
if (UseCompressedOops) {
return oopDesc::load_decode_heap_oop((narrowOop *)addr);
} else {
return oopDesc::load_decode_heap_oop((oop*)addr);
}
}
// Support for java_lang_ref_SoftReference
jlong java_lang_ref_SoftReference::timestamp(oop ref) {
return ref->long_field(timestamp_offset);
}
jlong java_lang_ref_SoftReference::clock() {
instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass());
jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
return *offset;
}
void java_lang_ref_SoftReference::set_clock(jlong value) {
instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass());
jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
*offset = value;
}
// Support for java_lang_invoke_MethodHandle
int java_lang_invoke_MethodHandle::_type_offset;
int java_lang_invoke_MethodHandle::_vmtarget_offset;
int java_lang_invoke_MethodHandle::_vmentry_offset;
int java_lang_invoke_MethodHandle::_vmslots_offset;
int java_lang_invoke_MemberName::_clazz_offset;
int java_lang_invoke_MemberName::_name_offset;
int java_lang_invoke_MemberName::_type_offset;
int java_lang_invoke_MemberName::_flags_offset;
int java_lang_invoke_MemberName::_vmtarget_offset;
int java_lang_invoke_MemberName::_vmindex_offset;
int java_lang_invoke_DirectMethodHandle::_vmindex_offset;
int java_lang_invoke_BoundMethodHandle::_argument_offset;
int java_lang_invoke_BoundMethodHandle::_vmargslot_offset;
int java_lang_invoke_AdapterMethodHandle::_conversion_offset;
void java_lang_invoke_MethodHandle::compute_offsets() {
klassOop k = SystemDictionary::MethodHandle_klass();
if (k != NULL && EnableMethodHandles) {
bool allow_super = false;
if (AllowTransitionalJSR292) allow_super = true; // temporary, to access java.dyn.MethodHandleImpl
compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature(), allow_super);
compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature(), allow_super);
compute_offset(_vmentry_offset, k, vmSymbols::vmentry_name(), vmSymbols::machine_word_signature(), allow_super);
// Note: MH.vmslots (if it is present) is a hoisted copy of MH.type.form.vmslots.
// It is optional pending experiments to keep or toss.
compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), allow_super);
}
}
void java_lang_invoke_MemberName::compute_offsets() {
klassOop k = SystemDictionary::MemberName_klass();
if (k != NULL && EnableMethodHandles) {
compute_offset(_clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::object_signature());
compute_offset(_flags_offset, k, vmSymbols::flags_name(), vmSymbols::int_signature());
compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature());
compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature());
}
}
void java_lang_invoke_DirectMethodHandle::compute_offsets() {
klassOop k = SystemDictionary::DirectMethodHandle_klass();
if (k != NULL && EnableMethodHandles) {
compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature(), true);
}
}
void java_lang_invoke_BoundMethodHandle::compute_offsets() {
klassOop k = SystemDictionary::BoundMethodHandle_klass();
if (k != NULL && EnableMethodHandles) {
compute_offset(_vmargslot_offset, k, vmSymbols::vmargslot_name(), vmSymbols::int_signature(), true);
compute_offset(_argument_offset, k, vmSymbols::argument_name(), vmSymbols::object_signature(), true);
}
}
void java_lang_invoke_AdapterMethodHandle::compute_offsets() {
klassOop k = SystemDictionary::AdapterMethodHandle_klass();
if (k != NULL && EnableMethodHandles) {
compute_offset(_conversion_offset, k, vmSymbols::conversion_name(), vmSymbols::int_signature(), true);
}
}
oop java_lang_invoke_MethodHandle::type(oop mh) {
return mh->obj_field(_type_offset);
}
void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
mh->obj_field_put(_type_offset, mtype);
}
int java_lang_invoke_MethodHandle::vmslots(oop mh) {
int vmslots_offset = _vmslots_offset;
if (vmslots_offset != 0) {
#ifdef ASSERT
int x = mh->int_field(vmslots_offset);
int y = compute_vmslots(mh);
assert(x == y, "correct hoisted value");
#endif
return mh->int_field(vmslots_offset);
} else {
return compute_vmslots(mh);
}
}
// if MH.vmslots exists, hoist into it the value of type.form.vmslots
void java_lang_invoke_MethodHandle::init_vmslots(oop mh) {
int vmslots_offset = _vmslots_offset;
if (vmslots_offset != 0) {
mh->int_field_put(vmslots_offset, compute_vmslots(mh));
}
}
// fetch type.form.vmslots, which is the number of JVM stack slots
// required to carry the arguments of this MH
int java_lang_invoke_MethodHandle::compute_vmslots(oop mh) {
oop mtype = type(mh);
if (mtype == NULL) return 0; // Java code would get NPE
oop form = java_lang_invoke_MethodType::form(mtype);
if (form == NULL) return 0; // Java code would get NPE
return java_lang_invoke_MethodTypeForm::vmslots(form);
}
// fetch the low-level entry point for this mh
MethodHandleEntry* java_lang_invoke_MethodHandle::vmentry(oop mh) {
return (MethodHandleEntry*) mh->address_field(_vmentry_offset);
}
void java_lang_invoke_MethodHandle::set_vmentry(oop mh, MethodHandleEntry* me) {
assert(_vmentry_offset != 0, "must be present");
// This is always the final step that initializes a valid method handle:
mh->release_address_field_put(_vmentry_offset, (address) me);
// There should be enough memory barriers on exit from native methods
// to ensure that the MH is fully initialized to all threads before
// Java code can publish it in global data structures.
// But just in case, we use release_address_field_put.
}
/// MemberName accessors
oop java_lang_invoke_MemberName::clazz(oop mname) {
assert(is_instance(mname), "wrong type");
return mname->obj_field(_clazz_offset);
}
void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
assert(is_instance(mname), "wrong type");
mname->obj_field_put(_clazz_offset, clazz);
}
oop java_lang_invoke_MemberName::name(oop mname) {
assert(is_instance(mname), "wrong type");
return mname->obj_field(_name_offset);
}
void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
assert(is_instance(mname), "wrong type");
mname->obj_field_put(_name_offset, name);
}
oop java_lang_invoke_MemberName::type(oop mname) {
assert(is_instance(mname), "wrong type");
return mname->obj_field(_type_offset);
}
void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
assert(is_instance(mname), "wrong type");
mname->obj_field_put(_type_offset, type);
}
int java_lang_invoke_MemberName::flags(oop mname) {
assert(is_instance(mname), "wrong type");
return mname->int_field(_flags_offset);
}
void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
assert(is_instance(mname), "wrong type");
mname->int_field_put(_flags_offset, flags);
}
oop java_lang_invoke_MemberName::vmtarget(oop mname) {
assert(is_instance(mname), "wrong type");
return mname->obj_field(_vmtarget_offset);
}
void java_lang_invoke_MemberName::set_vmtarget(oop mname, oop ref) {
assert(is_instance(mname), "wrong type");
mname->obj_field_put(_vmtarget_offset, ref);
}
int java_lang_invoke_MemberName::vmindex(oop mname) {
assert(is_instance(mname), "wrong type");
return mname->int_field(_vmindex_offset);
}
void java_lang_invoke_MemberName::set_vmindex(oop mname, int index) {
assert(is_instance(mname), "wrong type");
mname->int_field_put(_vmindex_offset, index);
}
oop java_lang_invoke_MethodHandle::vmtarget(oop mh) {
assert(is_instance(mh), "MH only");
return mh->obj_field(_vmtarget_offset);
}
void java_lang_invoke_MethodHandle::set_vmtarget(oop mh, oop ref) {
assert(is_instance(mh), "MH only");
mh->obj_field_put(_vmtarget_offset, ref);
}
int java_lang_invoke_DirectMethodHandle::vmindex(oop mh) {
assert(is_instance(mh), "DMH only");
return mh->int_field(_vmindex_offset);
}
void java_lang_invoke_DirectMethodHandle::set_vmindex(oop mh, int index) {
assert(is_instance(mh), "DMH only");
mh->int_field_put(_vmindex_offset, index);
}
int java_lang_invoke_BoundMethodHandle::vmargslot(oop mh) {
assert(is_instance(mh), "BMH only");
return mh->int_field(_vmargslot_offset);
}
oop java_lang_invoke_BoundMethodHandle::argument(oop mh) {
assert(is_instance(mh), "BMH only");
return mh->obj_field(_argument_offset);
}
int java_lang_invoke_AdapterMethodHandle::conversion(oop mh) {
assert(is_instance(mh), "AMH only");
return mh->int_field(_conversion_offset);
}
void java_lang_invoke_AdapterMethodHandle::set_conversion(oop mh, int conv) {
assert(is_instance(mh), "AMH only");
mh->int_field_put(_conversion_offset, conv);
}
// Support for java_lang_invoke_MethodType
int java_lang_invoke_MethodType::_rtype_offset;
int java_lang_invoke_MethodType::_ptypes_offset;
int java_lang_invoke_MethodType::_form_offset;
void java_lang_invoke_MethodType::compute_offsets() {
klassOop k = SystemDictionary::MethodType_klass();
if (k != NULL) {
compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
compute_offset(_form_offset, k, vmSymbols::form_name(), vmSymbols::java_lang_invoke_MethodTypeForm_signature());
}
}
void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
st->print("(");
objArrayOop pts = ptypes(mt);
for (int i = 0, limit = pts->length(); i < limit; i++) {
java_lang_Class::print_signature(pts->obj_at(i), st);
}
st->print(")");
java_lang_Class::print_signature(rtype(mt), st);
}
Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
ResourceMark rm;
stringStream buffer(128);
print_signature(mt, &buffer);
const char* sigstr = buffer.base();
int siglen = (int) buffer.size();
Symbol *name;
if (!intern_if_not_found) {
name = SymbolTable::probe(sigstr, siglen);
} else {
name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
}
return name;
}
oop java_lang_invoke_MethodType::rtype(oop mt) {
assert(is_instance(mt), "must be a MethodType");
return mt->obj_field(_rtype_offset);
}
objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
assert(is_instance(mt), "must be a MethodType");
return (objArrayOop) mt->obj_field(_ptypes_offset);
}
oop java_lang_invoke_MethodType::form(oop mt) {
assert(is_instance(mt), "must be a MethodType");
return mt->obj_field(_form_offset);
}
oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
return ptypes(mt)->obj_at(idx);
}
int java_lang_invoke_MethodType::ptype_count(oop mt) {
return ptypes(mt)->length();
}
// Support for java_lang_invoke_MethodTypeForm
int java_lang_invoke_MethodTypeForm::_vmslots_offset;
int java_lang_invoke_MethodTypeForm::_erasedType_offset;
int java_lang_invoke_MethodTypeForm::_genericInvoker_offset;
void java_lang_invoke_MethodTypeForm::compute_offsets() {
klassOop k = SystemDictionary::MethodTypeForm_klass();
if (k != NULL) {
compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true);
compute_optional_offset(_erasedType_offset, k, vmSymbols::erasedType_name(), vmSymbols::java_lang_invoke_MethodType_signature(), true);
compute_optional_offset(_genericInvoker_offset, k, vmSymbols::genericInvoker_name(), vmSymbols::java_lang_invoke_MethodHandle_signature(), true);
if (_genericInvoker_offset == 0) _genericInvoker_offset = -1; // set to explicit "empty" value
}
}
int java_lang_invoke_MethodTypeForm::vmslots(oop mtform) {
assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
return mtform->int_field(_vmslots_offset);
}
oop java_lang_invoke_MethodTypeForm::erasedType(oop mtform) {
assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
return mtform->obj_field(_erasedType_offset);
}
oop java_lang_invoke_MethodTypeForm::genericInvoker(oop mtform) {
assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only");
return mtform->obj_field(_genericInvoker_offset);
}
// Support for java_lang_invoke_CallSite
int java_lang_invoke_CallSite::_target_offset;
void java_lang_invoke_CallSite::compute_offsets() {
if (!EnableInvokeDynamic) return;
klassOop k = SystemDictionary::CallSite_klass();
if (k != NULL) {
compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
}
}
oop java_lang_invoke_CallSite::target(oop site) {
return site->obj_field(_target_offset);
}
void java_lang_invoke_CallSite::set_target(oop site, oop target) {
site->obj_field_put(_target_offset, target);
}
// 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_DelegatingClassLoader_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
int java_lang_System::in_offset_in_bytes() {
return (instanceMirrorKlass::offset_of_static_fields() + static_in_offset);
}
int java_lang_System::out_offset_in_bytes() {
return (instanceMirrorKlass::offset_of_static_fields() + static_out_offset);
}
int java_lang_System::err_offset_in_bytes() {
return (instanceMirrorKlass::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_Class::oop_size_offset;
int java_lang_Class::static_oop_field_count_offset;
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_boxing_object::long_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::static_in_offset;
int java_lang_System::static_out_offset;
int java_lang_System::static_err_offset;
int java_lang_StackTraceElement::declaringClass_offset;
int java_lang_StackTraceElement::methodName_offset;
int java_lang_StackTraceElement::fileName_offset;
int java_lang_StackTraceElement::lineNumber_offset;
int java_lang_AssertionStatusDirectives::classes_offset;
int java_lang_AssertionStatusDirectives::classEnabled_offset;
int java_lang_AssertionStatusDirectives::packages_offset;
int java_lang_AssertionStatusDirectives::packageEnabled_offset;
int java_lang_AssertionStatusDirectives::deflt_offset;
int java_nio_Buffer::_limit_offset;
int sun_misc_AtomicLongCSImpl::_value_offset;
int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
int sun_reflect_ConstantPool::_cp_oop_offset;
int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
// Support for java_lang_StackTraceElement
void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
element->obj_field_put(fileName_offset, value);
}
void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
element->obj_field_put(declaringClass_offset, value);
}
void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
element->obj_field_put(methodName_offset, value);
}
void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
element->int_field_put(lineNumber_offset, value);
}
// Support for java Assertions - java_lang_AssertionStatusDirectives.
void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
o->obj_field_put(classes_offset, val);
}
void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
o->obj_field_put(classEnabled_offset, val);
}
void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
o->obj_field_put(packages_offset, val);
}
void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
o->obj_field_put(packageEnabled_offset, val);
}
void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
o->bool_field_put(deflt_offset, val);
}
// Support for intrinsification of java.nio.Buffer.checkIndex
int java_nio_Buffer::limit_offset() {
return _limit_offset;
}
void java_nio_Buffer::compute_offsets() {
klassOop k = SystemDictionary::java_nio_Buffer_klass();
assert(k != NULL, "must be loaded in 1.4+");
compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
}
// Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate
int sun_misc_AtomicLongCSImpl::value_offset() {
assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this");
return _value_offset;
}
void sun_misc_AtomicLongCSImpl::compute_offsets() {
klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass();
// If this class is not present, its value field offset won't be referenced.
if (k != NULL) {
compute_offset(_value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature());
}
}
void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
if (_owner_offset != 0) return;
assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass();
compute_offset(_owner_offset, k,
vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
}
oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
assert(_owner_offset != 0, "Must be initialized");
return obj->obj_field(_owner_offset);
}
// Compute hard-coded offsets
// Invoked before SystemDictionary::initialize, so pre-loaded classes
// are not available to determine the offset_of_static_fields.
void JavaClasses::compute_hard_coded_offsets() {
const int x = heapOopSize;
const int header = instanceOopDesc::base_offset_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
int offset = header;
java_lang_Class::oop_size_offset = header;
offset += BytesPerInt;
java_lang_Class::static_oop_field_count_offset = offset;
offset = align_size_up(offset + BytesPerInt, x);
java_lang_Class::klass_offset = offset;
offset += x;
java_lang_Class::array_klass_offset = offset;
offset += x;
java_lang_Class::resolved_constructor_offset = offset;
}
// 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 + header;
java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
// 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 = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
// 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_Thread::compute_offsets();
java_lang_ThreadGroup::compute_offsets();
if (EnableMethodHandles) {
java_lang_invoke_MethodHandle::compute_offsets();
java_lang_invoke_MemberName::compute_offsets();
java_lang_invoke_DirectMethodHandle::compute_offsets();
java_lang_invoke_BoundMethodHandle::compute_offsets();
java_lang_invoke_AdapterMethodHandle::compute_offsets();
java_lang_invoke_MethodType::compute_offsets();
java_lang_invoke_MethodTypeForm::compute_offsets();
}
if (EnableInvokeDynamic) {
java_lang_invoke_CallSite::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();
// generated interpreter code wants to know about the offsets we just computed:
AbstractAssembler::update_delayed_values();
}
#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;
TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
instanceKlassHandle h_klass (THREAD, k);
TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
TempNewSymbol f_sig = SymbolTable::new_symbol(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;
TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
instanceKlassHandle h_klass (THREAD, k);
TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
TempNewSymbol f_sig = SymbolTable::new_symbol(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 + instanceMirrorKlass::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() - instanceMirrorKlass::offset_of_static_fields());
return false;
}
}
bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
EXCEPTION_MARK;
fieldDescriptor fd;
TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
instanceKlassHandle h_klass (THREAD, k);
TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
tty->print_cr("Static field %s.%s not found", klass_name, field_name);
return false;
}
if (!fd.is_static() || !fd.has_initial_value()) {
tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
return false;
}
if (!fd.initial_value_tag().is_int()) {
tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
return false;
}
jint field_value = fd.int_initial_value();
if (field_value == hardcoded_constant) {
return true;
} else {
tty->print_cr("Constant value of static field %s.%s is hardcoded as %d but should really be %d.", klass_name, field_name, hardcoded_constant, field_value);
return false;
}
}
// Check the hard-coded field offsets of all the classes in this file
void JavaClasses::check_offsets() {
bool valid = true;
#define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
#define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
#define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
#define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
// java.lang.String
CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
// java.lang.Class
// Fake fields
// CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
// CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
// CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked
// java.lang.Throwable
CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
// Boxed primitive objects (java_lang_boxing_object)
CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
CHECK_LONG_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_LONG_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.
}