/* * 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); } // 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, JavaObjectsInPerm, 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; } unsigned int java_lang_String::hash_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); if (length == 0) return 0; return hash_string(value->char_at_addr(offset), length); } 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(""); 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<>"; } // 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 // the format of the stacktrace will be: // - 1 or more fillInStackTrace frames for the exception class (skipped) // - 0 or more methods for the exception class (skipped) // - rest of the stack if (!skip_fillInStackTrace_check) { if ((method->name() == vmSymbols::fillInStackTrace_name() || method->name() == vmSymbols::fillInStackTrace0_name()) && throwable->is_a(method->method_holder())) { continue; } else { skip_fillInStackTrace_check = true; // gone past them all } } if (!skip_throwableInit_check) { assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); // skip methods of the exception class and superclasses // This is simlar to classic VM. if (method->name() == vmSymbols::object_initializer_name() && throwable->is_a(method->method_holder())) { continue; } else { // there are none or we've seen them all - either way stop checking 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 && EnableInvokeDynamic) { bool allow_super = false; 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 && EnableInvokeDynamic) { 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 && EnableInvokeDynamic) { 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 && EnableInvokeDynamic) { 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 && EnableInvokeDynamic) { 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 (EnableInvokeDynamic) { 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(); 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. }