| /* |
| * Copyright (c) 1998, 2010, 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 "incls/_precompiled.incl" |
| # include "incls/_verifier.cpp.incl" |
| |
| #define NOFAILOVER_MAJOR_VERSION 51 |
| |
| // Access to external entry for VerifyClassCodes - old byte code verifier |
| |
| extern "C" { |
| typedef jboolean (*verify_byte_codes_fn_t)(JNIEnv *, jclass, char *, jint); |
| typedef jboolean (*verify_byte_codes_fn_new_t)(JNIEnv *, jclass, char *, jint, jint); |
| } |
| |
| static void* volatile _verify_byte_codes_fn = NULL; |
| |
| static volatile jint _is_new_verify_byte_codes_fn = (jint) true; |
| |
| static void* verify_byte_codes_fn() { |
| if (_verify_byte_codes_fn == NULL) { |
| void *lib_handle = os::native_java_library(); |
| void *func = hpi::dll_lookup(lib_handle, "VerifyClassCodesForMajorVersion"); |
| OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); |
| if (func == NULL) { |
| OrderAccess::release_store(&_is_new_verify_byte_codes_fn, false); |
| func = hpi::dll_lookup(lib_handle, "VerifyClassCodes"); |
| OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); |
| } |
| } |
| return (void*)_verify_byte_codes_fn; |
| } |
| |
| |
| // Methods in Verifier |
| |
| bool Verifier::should_verify_for(oop class_loader, bool should_verify_class) { |
| return (class_loader == NULL || !should_verify_class) ? |
| BytecodeVerificationLocal : BytecodeVerificationRemote; |
| } |
| |
| bool Verifier::relax_verify_for(oop loader) { |
| bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); |
| bool need_verify = |
| // verifyAll |
| (BytecodeVerificationLocal && BytecodeVerificationRemote) || |
| // verifyRemote |
| (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted); |
| return !need_verify; |
| } |
| |
| bool Verifier::verify(instanceKlassHandle klass, Verifier::Mode mode, bool should_verify_class, TRAPS) { |
| ResourceMark rm(THREAD); |
| HandleMark hm; |
| |
| symbolHandle exception_name; |
| const size_t message_buffer_len = klass->name()->utf8_length() + 1024; |
| char* message_buffer = NEW_RESOURCE_ARRAY(char, message_buffer_len); |
| |
| const char* klassName = klass->external_name(); |
| |
| // If the class should be verified, first see if we can use the split |
| // verifier. If not, or if verification fails and FailOverToOldVerifier |
| // is set, then call the inference verifier. |
| if (is_eligible_for_verification(klass, should_verify_class)) { |
| if (TraceClassInitialization) { |
| tty->print_cr("Start class verification for: %s", klassName); |
| } |
| if (UseSplitVerifier && |
| klass->major_version() >= STACKMAP_ATTRIBUTE_MAJOR_VERSION) { |
| ClassVerifier split_verifier( |
| klass, message_buffer, message_buffer_len, THREAD); |
| split_verifier.verify_class(THREAD); |
| exception_name = split_verifier.result(); |
| if (klass->major_version() < NOFAILOVER_MAJOR_VERSION && |
| FailOverToOldVerifier && !HAS_PENDING_EXCEPTION && |
| (exception_name == vmSymbols::java_lang_VerifyError() || |
| exception_name == vmSymbols::java_lang_ClassFormatError())) { |
| if (TraceClassInitialization) { |
| tty->print_cr( |
| "Fail over class verification to old verifier for: %s", klassName); |
| } |
| exception_name = inference_verify( |
| klass, message_buffer, message_buffer_len, THREAD); |
| } |
| } else { |
| exception_name = inference_verify( |
| klass, message_buffer, message_buffer_len, THREAD); |
| } |
| |
| if (TraceClassInitialization) { |
| if (HAS_PENDING_EXCEPTION) { |
| tty->print("Verification for %s has", klassName); |
| tty->print_cr(" exception pending %s ", |
| instanceKlass::cast(PENDING_EXCEPTION->klass())->external_name()); |
| } else if (!exception_name.is_null()) { |
| tty->print_cr("Verification for %s failed", klassName); |
| } |
| tty->print_cr("End class verification for: %s", klassName); |
| } |
| } |
| |
| if (HAS_PENDING_EXCEPTION) { |
| return false; // use the existing exception |
| } else if (exception_name.is_null()) { |
| return true; // verifcation succeeded |
| } else { // VerifyError or ClassFormatError to be created and thrown |
| ResourceMark rm(THREAD); |
| instanceKlassHandle kls = |
| SystemDictionary::resolve_or_fail(exception_name, true, CHECK_false); |
| while (!kls.is_null()) { |
| if (kls == klass) { |
| // If the class being verified is the exception we're creating |
| // or one of it's superclasses, we're in trouble and are going |
| // to infinitely recurse when we try to initialize the exception. |
| // So bail out here by throwing the preallocated VM error. |
| THROW_OOP_(Universe::virtual_machine_error_instance(), false); |
| } |
| kls = kls->super(); |
| } |
| message_buffer[message_buffer_len - 1] = '\0'; // just to be sure |
| THROW_MSG_(exception_name, message_buffer, false); |
| } |
| } |
| |
| bool Verifier::is_eligible_for_verification(instanceKlassHandle klass, bool should_verify_class) { |
| symbolOop name = klass->name(); |
| klassOop refl_magic_klass = SystemDictionary::reflect_MagicAccessorImpl_klass(); |
| |
| return (should_verify_for(klass->class_loader(), should_verify_class) && |
| // return if the class is a bootstrapping class |
| // or defineClass specified not to verify by default (flags override passed arg) |
| // We need to skip the following four for bootstraping |
| name != vmSymbols::java_lang_Object() && |
| name != vmSymbols::java_lang_Class() && |
| name != vmSymbols::java_lang_String() && |
| name != vmSymbols::java_lang_Throwable() && |
| |
| // Can not verify the bytecodes for shared classes because they have |
| // already been rewritten to contain constant pool cache indices, |
| // which the verifier can't understand. |
| // Shared classes shouldn't have stackmaps either. |
| !klass()->is_shared() && |
| |
| // As of the fix for 4486457 we disable verification for all of the |
| // dynamically-generated bytecodes associated with the 1.4 |
| // reflection implementation, not just those associated with |
| // sun/reflect/SerializationConstructorAccessor. |
| // NOTE: this is called too early in the bootstrapping process to be |
| // guarded by Universe::is_gte_jdk14x_version()/UseNewReflection. |
| (refl_magic_klass == NULL || |
| !klass->is_subtype_of(refl_magic_klass) || |
| VerifyReflectionBytecodes) |
| ); |
| } |
| |
| symbolHandle Verifier::inference_verify( |
| instanceKlassHandle klass, char* message, size_t message_len, TRAPS) { |
| JavaThread* thread = (JavaThread*)THREAD; |
| JNIEnv *env = thread->jni_environment(); |
| |
| void* verify_func = verify_byte_codes_fn(); |
| |
| if (verify_func == NULL) { |
| jio_snprintf(message, message_len, "Could not link verifier"); |
| return vmSymbols::java_lang_VerifyError(); |
| } |
| |
| ResourceMark rm(THREAD); |
| if (ClassVerifier::_verify_verbose) { |
| tty->print_cr("Verifying class %s with old format", klass->external_name()); |
| } |
| |
| jclass cls = (jclass) JNIHandles::make_local(env, klass->java_mirror()); |
| jint result; |
| |
| { |
| HandleMark hm(thread); |
| ThreadToNativeFromVM ttn(thread); |
| // ThreadToNativeFromVM takes care of changing thread_state, so safepoint |
| // code knows that we have left the VM |
| |
| if (_is_new_verify_byte_codes_fn) { |
| verify_byte_codes_fn_new_t func = |
| CAST_TO_FN_PTR(verify_byte_codes_fn_new_t, verify_func); |
| result = (*func)(env, cls, message, (int)message_len, |
| klass->major_version()); |
| } else { |
| verify_byte_codes_fn_t func = |
| CAST_TO_FN_PTR(verify_byte_codes_fn_t, verify_func); |
| result = (*func)(env, cls, message, (int)message_len); |
| } |
| } |
| |
| JNIHandles::destroy_local(cls); |
| |
| // These numbers are chosen so that VerifyClassCodes interface doesn't need |
| // to be changed (still return jboolean (unsigned char)), and result is |
| // 1 when verification is passed. |
| symbolHandle nh(NULL); |
| if (result == 0) { |
| return vmSymbols::java_lang_VerifyError(); |
| } else if (result == 1) { |
| return nh; // verified. |
| } else if (result == 2) { |
| THROW_MSG_(vmSymbols::java_lang_OutOfMemoryError(), message, nh); |
| } else if (result == 3) { |
| return vmSymbols::java_lang_ClassFormatError(); |
| } else { |
| ShouldNotReachHere(); |
| return nh; |
| } |
| } |
| |
| // Methods in ClassVerifier |
| |
| bool ClassVerifier::_verify_verbose = false; |
| |
| ClassVerifier::ClassVerifier( |
| instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS) |
| : _thread(THREAD), _exception_type(symbolHandle()), _message(msg), |
| _message_buffer_len(msg_len), _klass(klass) { |
| _this_type = VerificationType::reference_type(klass->name()); |
| } |
| |
| ClassVerifier::~ClassVerifier() { |
| } |
| |
| void ClassVerifier::verify_class(TRAPS) { |
| if (_verify_verbose) { |
| tty->print_cr("Verifying class %s with new format", |
| _klass->external_name()); |
| } |
| |
| objArrayHandle methods(THREAD, _klass->methods()); |
| int num_methods = methods->length(); |
| |
| for (int index = 0; index < num_methods; index++) { |
| // Check for recursive re-verification before each method. |
| if (was_recursively_verified()) return; |
| |
| methodOop m = (methodOop)methods->obj_at(index); |
| if (m->is_native() || m->is_abstract()) { |
| // If m is native or abstract, skip it. It is checked in class file |
| // parser that methods do not override a final method. |
| continue; |
| } |
| verify_method(methodHandle(THREAD, m), CHECK_VERIFY(this)); |
| } |
| |
| if (_verify_verbose || TraceClassInitialization) { |
| if (was_recursively_verified()) |
| tty->print_cr("Recursive verification detected for: %s", |
| _klass->external_name()); |
| } |
| } |
| |
| void ClassVerifier::verify_method(methodHandle m, TRAPS) { |
| ResourceMark rm(THREAD); |
| _method = m; // initialize _method |
| if (_verify_verbose) { |
| tty->print_cr("Verifying method %s", m->name_and_sig_as_C_string()); |
| } |
| |
| const char* bad_type_msg = "Bad type on operand stack in %s"; |
| |
| int32_t max_stack = m->max_stack(); |
| int32_t max_locals = m->max_locals(); |
| constantPoolHandle cp(THREAD, m->constants()); |
| |
| if (!SignatureVerifier::is_valid_method_signature(m->signature())) { |
| class_format_error("Invalid method signature"); |
| return; |
| } |
| |
| // Initial stack map frame: offset is 0, stack is initially empty. |
| StackMapFrame current_frame(max_locals, max_stack, this); |
| // Set initial locals |
| VerificationType return_type = current_frame.set_locals_from_arg( |
| m, current_type(), CHECK_VERIFY(this)); |
| |
| int32_t stackmap_index = 0; // index to the stackmap array |
| |
| u4 code_length = m->code_size(); |
| |
| // Scan the bytecode and map each instruction's start offset to a number. |
| char* code_data = generate_code_data(m, code_length, CHECK_VERIFY(this)); |
| |
| int ex_min = code_length; |
| int ex_max = -1; |
| // Look through each item on the exception table. Each of the fields must refer |
| // to a legal instruction. |
| verify_exception_handler_table( |
| code_length, code_data, ex_min, ex_max, CHECK_VERIFY(this)); |
| |
| // Look through each entry on the local variable table and make sure |
| // its range of code array offsets is valid. (4169817) |
| if (m->has_localvariable_table()) { |
| verify_local_variable_table(code_length, code_data, CHECK_VERIFY(this)); |
| } |
| |
| typeArrayHandle stackmap_data(THREAD, m->stackmap_data()); |
| StackMapStream stream(stackmap_data); |
| StackMapReader reader(this, &stream, code_data, code_length, THREAD); |
| StackMapTable stackmap_table(&reader, ¤t_frame, max_locals, max_stack, |
| code_data, code_length, CHECK_VERIFY(this)); |
| |
| if (_verify_verbose) { |
| stackmap_table.print(); |
| } |
| |
| RawBytecodeStream bcs(m); |
| |
| // Scan the byte code linearly from the start to the end |
| bool no_control_flow = false; // Set to true when there is no direct control |
| // flow from current instruction to the next |
| // instruction in sequence |
| Bytecodes::Code opcode; |
| while (!bcs.is_last_bytecode()) { |
| // Check for recursive re-verification before each bytecode. |
| if (was_recursively_verified()) return; |
| |
| opcode = bcs.raw_next(); |
| u2 bci = bcs.bci(); |
| |
| // Set current frame's offset to bci |
| current_frame.set_offset(bci); |
| |
| // Make sure every offset in stackmap table point to the beginning to |
| // an instruction. Match current_frame to stackmap_table entry with |
| // the same offset if exists. |
| stackmap_index = verify_stackmap_table( |
| stackmap_index, bci, ¤t_frame, &stackmap_table, |
| no_control_flow, CHECK_VERIFY(this)); |
| |
| bool this_uninit = false; // Set to true when invokespecial <init> initialized 'this' |
| |
| // Merge with the next instruction |
| { |
| u2 index; |
| int target; |
| VerificationType type, type2; |
| VerificationType atype; |
| |
| #ifndef PRODUCT |
| if (_verify_verbose) { |
| current_frame.print(); |
| tty->print_cr("offset = %d, opcode = %s", bci, Bytecodes::name(opcode)); |
| } |
| #endif |
| |
| // Make sure wide instruction is in correct format |
| if (bcs.is_wide()) { |
| if (opcode != Bytecodes::_iinc && opcode != Bytecodes::_iload && |
| opcode != Bytecodes::_aload && opcode != Bytecodes::_lload && |
| opcode != Bytecodes::_istore && opcode != Bytecodes::_astore && |
| opcode != Bytecodes::_lstore && opcode != Bytecodes::_fload && |
| opcode != Bytecodes::_dload && opcode != Bytecodes::_fstore && |
| opcode != Bytecodes::_dstore) { |
| verify_error(bci, "Bad wide instruction"); |
| return; |
| } |
| } |
| |
| switch (opcode) { |
| case Bytecodes::_nop : |
| no_control_flow = false; break; |
| case Bytecodes::_aconst_null : |
| current_frame.push_stack( |
| VerificationType::null_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_iconst_m1 : |
| case Bytecodes::_iconst_0 : |
| case Bytecodes::_iconst_1 : |
| case Bytecodes::_iconst_2 : |
| case Bytecodes::_iconst_3 : |
| case Bytecodes::_iconst_4 : |
| case Bytecodes::_iconst_5 : |
| current_frame.push_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_lconst_0 : |
| case Bytecodes::_lconst_1 : |
| current_frame.push_stack_2( |
| VerificationType::long_type(), |
| VerificationType::long2_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_fconst_0 : |
| case Bytecodes::_fconst_1 : |
| case Bytecodes::_fconst_2 : |
| current_frame.push_stack( |
| VerificationType::float_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_dconst_0 : |
| case Bytecodes::_dconst_1 : |
| current_frame.push_stack_2( |
| VerificationType::double_type(), |
| VerificationType::double2_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_sipush : |
| case Bytecodes::_bipush : |
| current_frame.push_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_ldc : |
| verify_ldc( |
| opcode, bcs.get_index_u1(), ¤t_frame, |
| cp, bci, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_ldc_w : |
| case Bytecodes::_ldc2_w : |
| verify_ldc( |
| opcode, bcs.get_index_u2(), ¤t_frame, |
| cp, bci, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_iload : |
| verify_iload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_iload_0 : |
| case Bytecodes::_iload_1 : |
| case Bytecodes::_iload_2 : |
| case Bytecodes::_iload_3 : |
| index = opcode - Bytecodes::_iload_0; |
| verify_iload(index, ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_lload : |
| verify_lload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_lload_0 : |
| case Bytecodes::_lload_1 : |
| case Bytecodes::_lload_2 : |
| case Bytecodes::_lload_3 : |
| index = opcode - Bytecodes::_lload_0; |
| verify_lload(index, ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_fload : |
| verify_fload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_fload_0 : |
| case Bytecodes::_fload_1 : |
| case Bytecodes::_fload_2 : |
| case Bytecodes::_fload_3 : |
| index = opcode - Bytecodes::_fload_0; |
| verify_fload(index, ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_dload : |
| verify_dload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_dload_0 : |
| case Bytecodes::_dload_1 : |
| case Bytecodes::_dload_2 : |
| case Bytecodes::_dload_3 : |
| index = opcode - Bytecodes::_dload_0; |
| verify_dload(index, ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_aload : |
| verify_aload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_aload_0 : |
| case Bytecodes::_aload_1 : |
| case Bytecodes::_aload_2 : |
| case Bytecodes::_aload_3 : |
| index = opcode - Bytecodes::_aload_0; |
| verify_aload(index, ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_iaload : |
| type = current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| atype = current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| if (!atype.is_int_array()) { |
| verify_error(bci, bad_type_msg, "iaload"); |
| return; |
| } |
| current_frame.push_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_baload : |
| type = current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| atype = current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| if (!atype.is_bool_array() && !atype.is_byte_array()) { |
| verify_error(bci, bad_type_msg, "baload"); |
| return; |
| } |
| current_frame.push_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_caload : |
| type = current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| atype = current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| if (!atype.is_char_array()) { |
| verify_error(bci, bad_type_msg, "caload"); |
| return; |
| } |
| current_frame.push_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_saload : |
| type = current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| atype = current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| if (!atype.is_short_array()) { |
| verify_error(bci, bad_type_msg, "saload"); |
| return; |
| } |
| current_frame.push_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_laload : |
| type = current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| atype = current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| if (!atype.is_long_array()) { |
| verify_error(bci, bad_type_msg, "laload"); |
| return; |
| } |
| current_frame.push_stack_2( |
| VerificationType::long_type(), |
| VerificationType::long2_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_faload : |
| type = current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| atype = current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| if (!atype.is_float_array()) { |
| verify_error(bci, bad_type_msg, "faload"); |
| return; |
| } |
| current_frame.push_stack( |
| VerificationType::float_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_daload : |
| type = current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| atype = current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| if (!atype.is_double_array()) { |
| verify_error(bci, bad_type_msg, "daload"); |
| return; |
| } |
| current_frame.push_stack_2( |
| VerificationType::double_type(), |
| VerificationType::double2_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_aaload : { |
| type = current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| atype = current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| if (!atype.is_reference_array()) { |
| verify_error(bci, bad_type_msg, "aaload"); |
| return; |
| } |
| if (atype.is_null()) { |
| current_frame.push_stack( |
| VerificationType::null_type(), CHECK_VERIFY(this)); |
| } else { |
| VerificationType component = |
| atype.get_component(CHECK_VERIFY(this)); |
| current_frame.push_stack(component, CHECK_VERIFY(this)); |
| } |
| no_control_flow = false; break; |
| } |
| case Bytecodes::_istore : |
| verify_istore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_istore_0 : |
| case Bytecodes::_istore_1 : |
| case Bytecodes::_istore_2 : |
| case Bytecodes::_istore_3 : |
| index = opcode - Bytecodes::_istore_0; |
| verify_istore(index, ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_lstore : |
| verify_lstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_lstore_0 : |
| case Bytecodes::_lstore_1 : |
| case Bytecodes::_lstore_2 : |
| case Bytecodes::_lstore_3 : |
| index = opcode - Bytecodes::_lstore_0; |
| verify_lstore(index, ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_fstore : |
| verify_fstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_fstore_0 : |
| case Bytecodes::_fstore_1 : |
| case Bytecodes::_fstore_2 : |
| case Bytecodes::_fstore_3 : |
| index = opcode - Bytecodes::_fstore_0; |
| verify_fstore(index, ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_dstore : |
| verify_dstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_dstore_0 : |
| case Bytecodes::_dstore_1 : |
| case Bytecodes::_dstore_2 : |
| case Bytecodes::_dstore_3 : |
| index = opcode - Bytecodes::_dstore_0; |
| verify_dstore(index, ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_astore : |
| verify_astore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_astore_0 : |
| case Bytecodes::_astore_1 : |
| case Bytecodes::_astore_2 : |
| case Bytecodes::_astore_3 : |
| index = opcode - Bytecodes::_astore_0; |
| verify_astore(index, ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_iastore : |
| type = current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| type2 = current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| atype = current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| if (!atype.is_int_array()) { |
| verify_error(bci, bad_type_msg, "iastore"); |
| return; |
| } |
| no_control_flow = false; break; |
| case Bytecodes::_bastore : |
| type = current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| type2 = current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| atype = current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| if (!atype.is_bool_array() && !atype.is_byte_array()) { |
| verify_error(bci, bad_type_msg, "bastore"); |
| return; |
| } |
| no_control_flow = false; break; |
| case Bytecodes::_castore : |
| current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| atype = current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| if (!atype.is_char_array()) { |
| verify_error(bci, bad_type_msg, "castore"); |
| return; |
| } |
| no_control_flow = false; break; |
| case Bytecodes::_sastore : |
| current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| atype = current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| if (!atype.is_short_array()) { |
| verify_error(bci, bad_type_msg, "sastore"); |
| return; |
| } |
| no_control_flow = false; break; |
| case Bytecodes::_lastore : |
| current_frame.pop_stack_2( |
| VerificationType::long2_type(), |
| VerificationType::long_type(), CHECK_VERIFY(this)); |
| current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| atype = current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| if (!atype.is_long_array()) { |
| verify_error(bci, bad_type_msg, "lastore"); |
| return; |
| } |
| no_control_flow = false; break; |
| case Bytecodes::_fastore : |
| current_frame.pop_stack( |
| VerificationType::float_type(), CHECK_VERIFY(this)); |
| current_frame.pop_stack |
| (VerificationType::integer_type(), CHECK_VERIFY(this)); |
| atype = current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| if (!atype.is_float_array()) { |
| verify_error(bci, bad_type_msg, "fastore"); |
| return; |
| } |
| no_control_flow = false; break; |
| case Bytecodes::_dastore : |
| current_frame.pop_stack_2( |
| VerificationType::double2_type(), |
| VerificationType::double_type(), CHECK_VERIFY(this)); |
| current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| atype = current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| if (!atype.is_double_array()) { |
| verify_error(bci, bad_type_msg, "dastore"); |
| return; |
| } |
| no_control_flow = false; break; |
| case Bytecodes::_aastore : |
| type = current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| type2 = current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| atype = current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| // more type-checking is done at runtime |
| if (!atype.is_reference_array()) { |
| verify_error(bci, bad_type_msg, "aastore"); |
| return; |
| } |
| // 4938384: relaxed constraint in JVMS 3nd edition. |
| no_control_flow = false; break; |
| case Bytecodes::_pop : |
| current_frame.pop_stack( |
| VerificationType::category1_check(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_pop2 : |
| type = current_frame.pop_stack(CHECK_VERIFY(this)); |
| if (type.is_category1()) { |
| current_frame.pop_stack( |
| VerificationType::category1_check(), CHECK_VERIFY(this)); |
| } else if (type.is_category2_2nd()) { |
| current_frame.pop_stack( |
| VerificationType::category2_check(), CHECK_VERIFY(this)); |
| } else { |
| verify_error(bci, bad_type_msg, "pop2"); |
| return; |
| } |
| no_control_flow = false; break; |
| case Bytecodes::_dup : |
| type = current_frame.pop_stack( |
| VerificationType::category1_check(), CHECK_VERIFY(this)); |
| current_frame.push_stack(type, CHECK_VERIFY(this)); |
| current_frame.push_stack(type, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_dup_x1 : |
| type = current_frame.pop_stack( |
| VerificationType::category1_check(), CHECK_VERIFY(this)); |
| type2 = current_frame.pop_stack( |
| VerificationType::category1_check(), CHECK_VERIFY(this)); |
| current_frame.push_stack(type, CHECK_VERIFY(this)); |
| current_frame.push_stack(type2, CHECK_VERIFY(this)); |
| current_frame.push_stack(type, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_dup_x2 : |
| { |
| VerificationType type3; |
| type = current_frame.pop_stack( |
| VerificationType::category1_check(), CHECK_VERIFY(this)); |
| type2 = current_frame.pop_stack(CHECK_VERIFY(this)); |
| if (type2.is_category1()) { |
| type3 = current_frame.pop_stack( |
| VerificationType::category1_check(), CHECK_VERIFY(this)); |
| } else if (type2.is_category2_2nd()) { |
| type3 = current_frame.pop_stack( |
| VerificationType::category2_check(), CHECK_VERIFY(this)); |
| } else { |
| verify_error(bci, bad_type_msg, "dup_x2"); |
| return; |
| } |
| current_frame.push_stack(type, CHECK_VERIFY(this)); |
| current_frame.push_stack(type3, CHECK_VERIFY(this)); |
| current_frame.push_stack(type2, CHECK_VERIFY(this)); |
| current_frame.push_stack(type, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| } |
| case Bytecodes::_dup2 : |
| type = current_frame.pop_stack(CHECK_VERIFY(this)); |
| if (type.is_category1()) { |
| type2 = current_frame.pop_stack( |
| VerificationType::category1_check(), CHECK_VERIFY(this)); |
| } else if (type.is_category2_2nd()) { |
| type2 = current_frame.pop_stack( |
| VerificationType::category2_check(), CHECK_VERIFY(this)); |
| } else { |
| verify_error(bci, bad_type_msg, "dup2"); |
| return; |
| } |
| current_frame.push_stack(type2, CHECK_VERIFY(this)); |
| current_frame.push_stack(type, CHECK_VERIFY(this)); |
| current_frame.push_stack(type2, CHECK_VERIFY(this)); |
| current_frame.push_stack(type, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_dup2_x1 : |
| { |
| VerificationType type3; |
| type = current_frame.pop_stack(CHECK_VERIFY(this)); |
| if (type.is_category1()) { |
| type2 = current_frame.pop_stack( |
| VerificationType::category1_check(), CHECK_VERIFY(this)); |
| } else if(type.is_category2_2nd()) { |
| type2 = current_frame.pop_stack |
| (VerificationType::category2_check(), CHECK_VERIFY(this)); |
| } else { |
| verify_error(bci, bad_type_msg, "dup2_x1"); |
| return; |
| } |
| type3 = current_frame.pop_stack( |
| VerificationType::category1_check(), CHECK_VERIFY(this)); |
| current_frame.push_stack(type2, CHECK_VERIFY(this)); |
| current_frame.push_stack(type, CHECK_VERIFY(this)); |
| current_frame.push_stack(type3, CHECK_VERIFY(this)); |
| current_frame.push_stack(type2, CHECK_VERIFY(this)); |
| current_frame.push_stack(type, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| } |
| case Bytecodes::_dup2_x2 : |
| { |
| VerificationType type3, type4; |
| type = current_frame.pop_stack(CHECK_VERIFY(this)); |
| if (type.is_category1()) { |
| type2 = current_frame.pop_stack( |
| VerificationType::category1_check(), CHECK_VERIFY(this)); |
| } else if (type.is_category2_2nd()) { |
| type2 = current_frame.pop_stack( |
| VerificationType::category2_check(), CHECK_VERIFY(this)); |
| } else { |
| verify_error(bci, bad_type_msg, "dup2_x2"); |
| return; |
| } |
| type3 = current_frame.pop_stack(CHECK_VERIFY(this)); |
| if (type3.is_category1()) { |
| type4 = current_frame.pop_stack( |
| VerificationType::category1_check(), CHECK_VERIFY(this)); |
| } else if (type3.is_category2_2nd()) { |
| type4 = current_frame.pop_stack( |
| VerificationType::category2_check(), CHECK_VERIFY(this)); |
| } else { |
| verify_error(bci, bad_type_msg, "dup2_x2"); |
| return; |
| } |
| current_frame.push_stack(type2, CHECK_VERIFY(this)); |
| current_frame.push_stack(type, CHECK_VERIFY(this)); |
| current_frame.push_stack(type4, CHECK_VERIFY(this)); |
| current_frame.push_stack(type3, CHECK_VERIFY(this)); |
| current_frame.push_stack(type2, CHECK_VERIFY(this)); |
| current_frame.push_stack(type, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| } |
| case Bytecodes::_swap : |
| type = current_frame.pop_stack( |
| VerificationType::category1_check(), CHECK_VERIFY(this)); |
| type2 = current_frame.pop_stack( |
| VerificationType::category1_check(), CHECK_VERIFY(this)); |
| current_frame.push_stack(type, CHECK_VERIFY(this)); |
| current_frame.push_stack(type2, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_iadd : |
| case Bytecodes::_isub : |
| case Bytecodes::_imul : |
| case Bytecodes::_idiv : |
| case Bytecodes::_irem : |
| case Bytecodes::_ishl : |
| case Bytecodes::_ishr : |
| case Bytecodes::_iushr : |
| case Bytecodes::_ior : |
| case Bytecodes::_ixor : |
| case Bytecodes::_iand : |
| current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| // fall through |
| case Bytecodes::_ineg : |
| current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_ladd : |
| case Bytecodes::_lsub : |
| case Bytecodes::_lmul : |
| case Bytecodes::_ldiv : |
| case Bytecodes::_lrem : |
| case Bytecodes::_land : |
| case Bytecodes::_lor : |
| case Bytecodes::_lxor : |
| current_frame.pop_stack_2( |
| VerificationType::long2_type(), |
| VerificationType::long_type(), CHECK_VERIFY(this)); |
| // fall through |
| case Bytecodes::_lneg : |
| current_frame.pop_stack_2( |
| VerificationType::long2_type(), |
| VerificationType::long_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack_2( |
| VerificationType::long_type(), |
| VerificationType::long2_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_lshl : |
| case Bytecodes::_lshr : |
| case Bytecodes::_lushr : |
| current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| current_frame.pop_stack_2( |
| VerificationType::long2_type(), |
| VerificationType::long_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack_2( |
| VerificationType::long_type(), |
| VerificationType::long2_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_fadd : |
| case Bytecodes::_fsub : |
| case Bytecodes::_fmul : |
| case Bytecodes::_fdiv : |
| case Bytecodes::_frem : |
| current_frame.pop_stack( |
| VerificationType::float_type(), CHECK_VERIFY(this)); |
| // fall through |
| case Bytecodes::_fneg : |
| current_frame.pop_stack( |
| VerificationType::float_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack( |
| VerificationType::float_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_dadd : |
| case Bytecodes::_dsub : |
| case Bytecodes::_dmul : |
| case Bytecodes::_ddiv : |
| case Bytecodes::_drem : |
| current_frame.pop_stack_2( |
| VerificationType::double2_type(), |
| VerificationType::double_type(), CHECK_VERIFY(this)); |
| // fall through |
| case Bytecodes::_dneg : |
| current_frame.pop_stack_2( |
| VerificationType::double2_type(), |
| VerificationType::double_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack_2( |
| VerificationType::double_type(), |
| VerificationType::double2_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_iinc : |
| verify_iinc(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_i2l : |
| type = current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack_2( |
| VerificationType::long_type(), |
| VerificationType::long2_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_l2i : |
| current_frame.pop_stack_2( |
| VerificationType::long2_type(), |
| VerificationType::long_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_i2f : |
| current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack( |
| VerificationType::float_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_i2d : |
| current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack_2( |
| VerificationType::double_type(), |
| VerificationType::double2_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_l2f : |
| current_frame.pop_stack_2( |
| VerificationType::long2_type(), |
| VerificationType::long_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack( |
| VerificationType::float_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_l2d : |
| current_frame.pop_stack_2( |
| VerificationType::long2_type(), |
| VerificationType::long_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack_2( |
| VerificationType::double_type(), |
| VerificationType::double2_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_f2i : |
| current_frame.pop_stack( |
| VerificationType::float_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_f2l : |
| current_frame.pop_stack( |
| VerificationType::float_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack_2( |
| VerificationType::long_type(), |
| VerificationType::long2_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_f2d : |
| current_frame.pop_stack( |
| VerificationType::float_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack_2( |
| VerificationType::double_type(), |
| VerificationType::double2_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_d2i : |
| current_frame.pop_stack_2( |
| VerificationType::double2_type(), |
| VerificationType::double_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_d2l : |
| current_frame.pop_stack_2( |
| VerificationType::double2_type(), |
| VerificationType::double_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack_2( |
| VerificationType::long_type(), |
| VerificationType::long2_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_d2f : |
| current_frame.pop_stack_2( |
| VerificationType::double2_type(), |
| VerificationType::double_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack( |
| VerificationType::float_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_i2b : |
| case Bytecodes::_i2c : |
| case Bytecodes::_i2s : |
| current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_lcmp : |
| current_frame.pop_stack_2( |
| VerificationType::long2_type(), |
| VerificationType::long_type(), CHECK_VERIFY(this)); |
| current_frame.pop_stack_2( |
| VerificationType::long2_type(), |
| VerificationType::long_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_fcmpl : |
| case Bytecodes::_fcmpg : |
| current_frame.pop_stack( |
| VerificationType::float_type(), CHECK_VERIFY(this)); |
| current_frame.pop_stack( |
| VerificationType::float_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_dcmpl : |
| case Bytecodes::_dcmpg : |
| current_frame.pop_stack_2( |
| VerificationType::double2_type(), |
| VerificationType::double_type(), CHECK_VERIFY(this)); |
| current_frame.pop_stack_2( |
| VerificationType::double2_type(), |
| VerificationType::double_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_if_icmpeq: |
| case Bytecodes::_if_icmpne: |
| case Bytecodes::_if_icmplt: |
| case Bytecodes::_if_icmpge: |
| case Bytecodes::_if_icmpgt: |
| case Bytecodes::_if_icmple: |
| current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| // fall through |
| case Bytecodes::_ifeq: |
| case Bytecodes::_ifne: |
| case Bytecodes::_iflt: |
| case Bytecodes::_ifge: |
| case Bytecodes::_ifgt: |
| case Bytecodes::_ifle: |
| current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| target = bcs.dest(); |
| stackmap_table.check_jump_target( |
| ¤t_frame, target, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_if_acmpeq : |
| case Bytecodes::_if_acmpne : |
| current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| // fall through |
| case Bytecodes::_ifnull : |
| case Bytecodes::_ifnonnull : |
| current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| target = bcs.dest(); |
| stackmap_table.check_jump_target |
| (¤t_frame, target, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_goto : |
| target = bcs.dest(); |
| stackmap_table.check_jump_target( |
| ¤t_frame, target, CHECK_VERIFY(this)); |
| no_control_flow = true; break; |
| case Bytecodes::_goto_w : |
| target = bcs.dest_w(); |
| stackmap_table.check_jump_target( |
| ¤t_frame, target, CHECK_VERIFY(this)); |
| no_control_flow = true; break; |
| case Bytecodes::_tableswitch : |
| case Bytecodes::_lookupswitch : |
| verify_switch( |
| &bcs, code_length, code_data, ¤t_frame, |
| &stackmap_table, CHECK_VERIFY(this)); |
| no_control_flow = true; break; |
| case Bytecodes::_ireturn : |
| type = current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); |
| no_control_flow = true; break; |
| case Bytecodes::_lreturn : |
| type2 = current_frame.pop_stack( |
| VerificationType::long2_type(), CHECK_VERIFY(this)); |
| type = current_frame.pop_stack( |
| VerificationType::long_type(), CHECK_VERIFY(this)); |
| verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); |
| no_control_flow = true; break; |
| case Bytecodes::_freturn : |
| type = current_frame.pop_stack( |
| VerificationType::float_type(), CHECK_VERIFY(this)); |
| verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); |
| no_control_flow = true; break; |
| case Bytecodes::_dreturn : |
| type2 = current_frame.pop_stack( |
| VerificationType::double2_type(), CHECK_VERIFY(this)); |
| type = current_frame.pop_stack( |
| VerificationType::double_type(), CHECK_VERIFY(this)); |
| verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); |
| no_control_flow = true; break; |
| case Bytecodes::_areturn : |
| type = current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); |
| no_control_flow = true; break; |
| case Bytecodes::_return : |
| if (return_type != VerificationType::bogus_type()) { |
| verify_error(bci, "Method expects no return value"); |
| return; |
| } |
| // Make sure "this" has been initialized if current method is an |
| // <init> |
| if (_method->name() == vmSymbols::object_initializer_name() && |
| current_frame.flag_this_uninit()) { |
| verify_error(bci, |
| "Constructor must call super() or this() before return"); |
| return; |
| } |
| no_control_flow = true; break; |
| case Bytecodes::_getstatic : |
| case Bytecodes::_putstatic : |
| case Bytecodes::_getfield : |
| case Bytecodes::_putfield : |
| verify_field_instructions( |
| &bcs, ¤t_frame, cp, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_invokevirtual : |
| case Bytecodes::_invokespecial : |
| case Bytecodes::_invokestatic : |
| verify_invoke_instructions( |
| &bcs, code_length, ¤t_frame, |
| &this_uninit, return_type, cp, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_invokeinterface : |
| case Bytecodes::_invokedynamic : |
| verify_invoke_instructions( |
| &bcs, code_length, ¤t_frame, |
| &this_uninit, return_type, cp, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_new : |
| { |
| index = bcs.get_index_u2(); |
| verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
| VerificationType new_class_type = |
| cp_index_to_type(index, cp, CHECK_VERIFY(this)); |
| if (!new_class_type.is_object()) { |
| verify_error(bci, "Illegal new instruction"); |
| return; |
| } |
| type = VerificationType::uninitialized_type(bci); |
| current_frame.push_stack(type, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| } |
| case Bytecodes::_newarray : |
| type = get_newarray_type(bcs.get_index(), bci, CHECK_VERIFY(this)); |
| current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| current_frame.push_stack(type, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_anewarray : |
| verify_anewarray( |
| bcs.get_index_u2(), cp, ¤t_frame, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_arraylength : |
| type = current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| if (!(type.is_null() || type.is_array())) { |
| verify_error(bci, bad_type_msg, "arraylength"); |
| } |
| current_frame.push_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_checkcast : |
| { |
| index = bcs.get_index_u2(); |
| verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
| current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| VerificationType klass_type = cp_index_to_type( |
| index, cp, CHECK_VERIFY(this)); |
| current_frame.push_stack(klass_type, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| } |
| case Bytecodes::_instanceof : { |
| index = bcs.get_index_u2(); |
| verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
| current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| current_frame.push_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| } |
| case Bytecodes::_monitorenter : |
| case Bytecodes::_monitorexit : |
| current_frame.pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| case Bytecodes::_multianewarray : |
| { |
| index = bcs.get_index_u2(); |
| u2 dim = *(bcs.bcp()+3); |
| verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
| VerificationType new_array_type = |
| cp_index_to_type(index, cp, CHECK_VERIFY(this)); |
| if (!new_array_type.is_array()) { |
| verify_error(bci, |
| "Illegal constant pool index in multianewarray instruction"); |
| return; |
| } |
| if (dim < 1 || new_array_type.dimensions() < dim) { |
| verify_error(bci, |
| "Illegal dimension in multianewarray instruction"); |
| return; |
| } |
| for (int i = 0; i < dim; i++) { |
| current_frame.pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| } |
| current_frame.push_stack(new_array_type, CHECK_VERIFY(this)); |
| no_control_flow = false; break; |
| } |
| case Bytecodes::_athrow : |
| type = VerificationType::reference_type( |
| vmSymbols::java_lang_Throwable()); |
| current_frame.pop_stack(type, CHECK_VERIFY(this)); |
| no_control_flow = true; break; |
| default: |
| // We only need to check the valid bytecodes in class file. |
| // And jsr and ret are not in the new class file format in JDK1.5. |
| verify_error(bci, "Bad instruction"); |
| no_control_flow = false; |
| return; |
| } // end switch |
| } // end Merge with the next instruction |
| |
| // Look for possible jump target in exception handlers and see if it |
| // matches current_frame |
| if (bci >= ex_min && bci < ex_max) { |
| verify_exception_handler_targets( |
| bci, this_uninit, ¤t_frame, &stackmap_table, CHECK_VERIFY(this)); |
| } |
| } // end while |
| |
| // Make sure that control flow does not fall through end of the method |
| if (!no_control_flow) { |
| verify_error(code_length, "Control flow falls through code end"); |
| return; |
| } |
| } |
| |
| char* ClassVerifier::generate_code_data(methodHandle m, u4 code_length, TRAPS) { |
| char* code_data = NEW_RESOURCE_ARRAY(char, code_length); |
| memset(code_data, 0, sizeof(char) * code_length); |
| RawBytecodeStream bcs(m); |
| |
| while (!bcs.is_last_bytecode()) { |
| if (bcs.raw_next() != Bytecodes::_illegal) { |
| int bci = bcs.bci(); |
| if (bcs.raw_code() == Bytecodes::_new) { |
| code_data[bci] = NEW_OFFSET; |
| } else { |
| code_data[bci] = BYTECODE_OFFSET; |
| } |
| } else { |
| verify_error(bcs.bci(), "Bad instruction"); |
| return NULL; |
| } |
| } |
| |
| return code_data; |
| } |
| |
| void ClassVerifier::verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS) { |
| typeArrayHandle exhandlers (THREAD, _method->exception_table()); |
| constantPoolHandle cp (THREAD, _method->constants()); |
| |
| if (exhandlers() != NULL) { |
| for(int i = 0; i < exhandlers->length();) { |
| u2 start_pc = exhandlers->int_at(i++); |
| u2 end_pc = exhandlers->int_at(i++); |
| u2 handler_pc = exhandlers->int_at(i++); |
| if (start_pc >= code_length || code_data[start_pc] == 0) { |
| class_format_error("Illegal exception table start_pc %d", start_pc); |
| return; |
| } |
| if (end_pc != code_length) { // special case: end_pc == code_length |
| if (end_pc > code_length || code_data[end_pc] == 0) { |
| class_format_error("Illegal exception table end_pc %d", end_pc); |
| return; |
| } |
| } |
| if (handler_pc >= code_length || code_data[handler_pc] == 0) { |
| class_format_error("Illegal exception table handler_pc %d", handler_pc); |
| return; |
| } |
| int catch_type_index = exhandlers->int_at(i++); |
| if (catch_type_index != 0) { |
| VerificationType catch_type = cp_index_to_type( |
| catch_type_index, cp, CHECK_VERIFY(this)); |
| VerificationType throwable = |
| VerificationType::reference_type(vmSymbols::java_lang_Throwable()); |
| bool is_subclass = throwable.is_assignable_from( |
| catch_type, current_class(), CHECK_VERIFY(this)); |
| if (!is_subclass) { |
| // 4286534: should throw VerifyError according to recent spec change |
| verify_error( |
| "Catch type is not a subclass of Throwable in handler %d", |
| handler_pc); |
| return; |
| } |
| } |
| if (start_pc < min) min = start_pc; |
| if (end_pc > max) max = end_pc; |
| } |
| } |
| } |
| |
| void ClassVerifier::verify_local_variable_table(u4 code_length, char* code_data, TRAPS) { |
| int localvariable_table_length = _method()->localvariable_table_length(); |
| if (localvariable_table_length > 0) { |
| LocalVariableTableElement* table = _method()->localvariable_table_start(); |
| for (int i = 0; i < localvariable_table_length; i++) { |
| u2 start_bci = table[i].start_bci; |
| u2 length = table[i].length; |
| |
| if (start_bci >= code_length || code_data[start_bci] == 0) { |
| class_format_error( |
| "Illegal local variable table start_pc %d", start_bci); |
| return; |
| } |
| u4 end_bci = (u4)(start_bci + length); |
| if (end_bci != code_length) { |
| if (end_bci >= code_length || code_data[end_bci] == 0) { |
| class_format_error( "Illegal local variable table length %d", length); |
| return; |
| } |
| } |
| } |
| } |
| } |
| |
| u2 ClassVerifier::verify_stackmap_table(u2 stackmap_index, u2 bci, |
| StackMapFrame* current_frame, |
| StackMapTable* stackmap_table, |
| bool no_control_flow, TRAPS) { |
| if (stackmap_index < stackmap_table->get_frame_count()) { |
| u2 this_offset = stackmap_table->get_offset(stackmap_index); |
| if (no_control_flow && this_offset > bci) { |
| verify_error(bci, "Expecting a stack map frame"); |
| return 0; |
| } |
| if (this_offset == bci) { |
| // See if current stack map can be assigned to the frame in table. |
| // current_frame is the stackmap frame got from the last instruction. |
| // If matched, current_frame will be updated by this method. |
| bool match = stackmap_table->match_stackmap( |
| current_frame, this_offset, stackmap_index, |
| !no_control_flow, true, CHECK_VERIFY_(this, 0)); |
| if (!match) { |
| // report type error |
| verify_error(bci, "Instruction type does not match stack map"); |
| return 0; |
| } |
| stackmap_index++; |
| } else if (this_offset < bci) { |
| // current_offset should have met this_offset. |
| class_format_error("Bad stack map offset %d", this_offset); |
| return 0; |
| } |
| } else if (no_control_flow) { |
| verify_error(bci, "Expecting a stack map frame"); |
| return 0; |
| } |
| return stackmap_index; |
| } |
| |
| void ClassVerifier::verify_exception_handler_targets(u2 bci, bool this_uninit, StackMapFrame* current_frame, |
| StackMapTable* stackmap_table, TRAPS) { |
| constantPoolHandle cp (THREAD, _method->constants()); |
| typeArrayHandle exhandlers (THREAD, _method->exception_table()); |
| if (exhandlers() != NULL) { |
| for(int i = 0; i < exhandlers->length();) { |
| u2 start_pc = exhandlers->int_at(i++); |
| u2 end_pc = exhandlers->int_at(i++); |
| u2 handler_pc = exhandlers->int_at(i++); |
| int catch_type_index = exhandlers->int_at(i++); |
| if(bci >= start_pc && bci < end_pc) { |
| u1 flags = current_frame->flags(); |
| if (this_uninit) { flags |= FLAG_THIS_UNINIT; } |
| |
| ResourceMark rm(THREAD); |
| StackMapFrame* new_frame = current_frame->frame_in_exception_handler(flags); |
| if (catch_type_index != 0) { |
| // We know that this index refers to a subclass of Throwable |
| VerificationType catch_type = cp_index_to_type( |
| catch_type_index, cp, CHECK_VERIFY(this)); |
| new_frame->push_stack(catch_type, CHECK_VERIFY(this)); |
| } else { |
| VerificationType throwable = |
| VerificationType::reference_type(vmSymbols::java_lang_Throwable()); |
| new_frame->push_stack(throwable, CHECK_VERIFY(this)); |
| } |
| bool match = stackmap_table->match_stackmap( |
| new_frame, handler_pc, true, false, CHECK_VERIFY(this)); |
| if (!match) { |
| verify_error(bci, |
| "Stack map does not match the one at exception handler %d", |
| handler_pc); |
| return; |
| } |
| } |
| } |
| } |
| } |
| |
| void ClassVerifier::verify_cp_index(constantPoolHandle cp, int index, TRAPS) { |
| int nconstants = cp->length(); |
| if ((index <= 0) || (index >= nconstants)) { |
| verify_error("Illegal constant pool index %d in class %s", |
| index, instanceKlass::cast(cp->pool_holder())->external_name()); |
| return; |
| } |
| } |
| |
| void ClassVerifier::verify_cp_type( |
| int index, constantPoolHandle cp, unsigned int types, TRAPS) { |
| |
| // In some situations, bytecode rewriting may occur while we're verifying. |
| // In this case, a constant pool cache exists and some indices refer to that |
| // instead. Be sure we don't pick up such indices by accident. |
| // We must check was_recursively_verified() before we get here. |
| guarantee(cp->cache() == NULL, "not rewritten yet"); |
| |
| verify_cp_index(cp, index, CHECK_VERIFY(this)); |
| unsigned int tag = cp->tag_at(index).value(); |
| if ((types & (1 << tag)) == 0) { |
| verify_error( |
| "Illegal type at constant pool entry %d in class %s", |
| index, instanceKlass::cast(cp->pool_holder())->external_name()); |
| return; |
| } |
| } |
| |
| void ClassVerifier::verify_cp_class_type( |
| int index, constantPoolHandle cp, TRAPS) { |
| verify_cp_index(cp, index, CHECK_VERIFY(this)); |
| constantTag tag = cp->tag_at(index); |
| if (!tag.is_klass() && !tag.is_unresolved_klass()) { |
| verify_error("Illegal type at constant pool entry %d in class %s", |
| index, instanceKlass::cast(cp->pool_holder())->external_name()); |
| return; |
| } |
| } |
| |
| void ClassVerifier::format_error_message( |
| const char* fmt, int offset, va_list va) { |
| ResourceMark rm(_thread); |
| stringStream message(_message, _message_buffer_len); |
| message.vprint(fmt, va); |
| if (!_method.is_null()) { |
| message.print(" in method %s", _method->name_and_sig_as_C_string()); |
| } |
| if (offset != -1) { |
| message.print(" at offset %d", offset); |
| } |
| } |
| |
| void ClassVerifier::verify_error(u2 offset, const char* fmt, ...) { |
| _exception_type = vmSymbols::java_lang_VerifyError(); |
| va_list va; |
| va_start(va, fmt); |
| format_error_message(fmt, offset, va); |
| va_end(va); |
| } |
| |
| void ClassVerifier::verify_error(const char* fmt, ...) { |
| _exception_type = vmSymbols::java_lang_VerifyError(); |
| va_list va; |
| va_start(va, fmt); |
| format_error_message(fmt, -1, va); |
| va_end(va); |
| } |
| |
| void ClassVerifier::class_format_error(const char* msg, ...) { |
| _exception_type = vmSymbols::java_lang_ClassFormatError(); |
| va_list va; |
| va_start(va, msg); |
| format_error_message(msg, -1, va); |
| va_end(va); |
| } |
| |
| klassOop ClassVerifier::load_class(symbolHandle name, TRAPS) { |
| // Get current loader and protection domain first. |
| oop loader = current_class()->class_loader(); |
| oop protection_domain = current_class()->protection_domain(); |
| |
| return SystemDictionary::resolve_or_fail( |
| name, Handle(THREAD, loader), Handle(THREAD, protection_domain), |
| true, CHECK_NULL); |
| } |
| |
| bool ClassVerifier::is_protected_access(instanceKlassHandle this_class, |
| klassOop target_class, |
| symbolOop field_name, |
| symbolOop field_sig, |
| bool is_method) { |
| No_Safepoint_Verifier nosafepoint; |
| |
| // If target class isn't a super class of this class, we don't worry about this case |
| if (!this_class->is_subclass_of(target_class)) { |
| return false; |
| } |
| // Check if the specified method or field is protected |
| instanceKlass* target_instance = instanceKlass::cast(target_class); |
| fieldDescriptor fd; |
| if (is_method) { |
| methodOop m = target_instance->uncached_lookup_method(field_name, field_sig); |
| if (m != NULL && m->is_protected()) { |
| if (!this_class->is_same_class_package(m->method_holder())) { |
| return true; |
| } |
| } |
| } else { |
| klassOop member_klass = target_instance->find_field(field_name, field_sig, &fd); |
| if(member_klass != NULL && fd.is_protected()) { |
| if (!this_class->is_same_class_package(member_klass)) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| void ClassVerifier::verify_ldc( |
| int opcode, u2 index, StackMapFrame *current_frame, |
| constantPoolHandle cp, u2 bci, TRAPS) { |
| verify_cp_index(cp, index, CHECK_VERIFY(this)); |
| constantTag tag = cp->tag_at(index); |
| unsigned int types; |
| if (opcode == Bytecodes::_ldc || opcode == Bytecodes::_ldc_w) { |
| if (!tag.is_unresolved_string() && !tag.is_unresolved_klass()) { |
| types = (1 << JVM_CONSTANT_Integer) | (1 << JVM_CONSTANT_Float) |
| | (1 << JVM_CONSTANT_String) | (1 << JVM_CONSTANT_Class) |
| | (1 << JVM_CONSTANT_MethodHandle) | (1 << JVM_CONSTANT_MethodType); |
| // Note: The class file parser already verified the legality of |
| // MethodHandle and MethodType constants. |
| verify_cp_type(index, cp, types, CHECK_VERIFY(this)); |
| } |
| } else { |
| assert(opcode == Bytecodes::_ldc2_w, "must be ldc2_w"); |
| types = (1 << JVM_CONSTANT_Double) | (1 << JVM_CONSTANT_Long); |
| verify_cp_type(index, cp, types, CHECK_VERIFY(this)); |
| } |
| if (tag.is_string() && cp->is_pseudo_string_at(index)) { |
| current_frame->push_stack( |
| VerificationType::reference_type( |
| vmSymbols::java_lang_Object()), CHECK_VERIFY(this)); |
| } else if (tag.is_string() || tag.is_unresolved_string()) { |
| current_frame->push_stack( |
| VerificationType::reference_type( |
| vmSymbols::java_lang_String()), CHECK_VERIFY(this)); |
| } else if (tag.is_klass() || tag.is_unresolved_klass()) { |
| current_frame->push_stack( |
| VerificationType::reference_type( |
| vmSymbols::java_lang_Class()), CHECK_VERIFY(this)); |
| } else if (tag.is_int()) { |
| current_frame->push_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| } else if (tag.is_float()) { |
| current_frame->push_stack( |
| VerificationType::float_type(), CHECK_VERIFY(this)); |
| } else if (tag.is_double()) { |
| current_frame->push_stack_2( |
| VerificationType::double_type(), |
| VerificationType::double2_type(), CHECK_VERIFY(this)); |
| } else if (tag.is_long()) { |
| current_frame->push_stack_2( |
| VerificationType::long_type(), |
| VerificationType::long2_type(), CHECK_VERIFY(this)); |
| } else if (tag.is_method_handle()) { |
| current_frame->push_stack( |
| VerificationType::reference_type( |
| vmSymbols::java_dyn_MethodHandle()), CHECK_VERIFY(this)); |
| } else if (tag.is_method_type()) { |
| current_frame->push_stack( |
| VerificationType::reference_type( |
| vmSymbols::java_dyn_MethodType()), CHECK_VERIFY(this)); |
| } else { |
| verify_error(bci, "Invalid index in ldc"); |
| return; |
| } |
| } |
| |
| void ClassVerifier::verify_switch( |
| RawBytecodeStream* bcs, u4 code_length, char* code_data, |
| StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS) { |
| int bci = bcs->bci(); |
| address bcp = bcs->bcp(); |
| address aligned_bcp = (address) round_to((intptr_t)(bcp + 1), jintSize); |
| |
| // 4639449 & 4647081: padding bytes must be 0 |
| u2 padding_offset = 1; |
| while ((bcp + padding_offset) < aligned_bcp) { |
| if(*(bcp + padding_offset) != 0) { |
| verify_error(bci, "Nonzero padding byte in lookswitch or tableswitch"); |
| return; |
| } |
| padding_offset++; |
| } |
| int default_offset = (int) Bytes::get_Java_u4(aligned_bcp); |
| int keys, delta; |
| current_frame->pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| if (bcs->raw_code() == Bytecodes::_tableswitch) { |
| jint low = (jint)Bytes::get_Java_u4(aligned_bcp + jintSize); |
| jint high = (jint)Bytes::get_Java_u4(aligned_bcp + 2*jintSize); |
| if (low > high) { |
| verify_error(bci, |
| "low must be less than or equal to high in tableswitch"); |
| return; |
| } |
| keys = high - low + 1; |
| if (keys < 0) { |
| verify_error(bci, "too many keys in tableswitch"); |
| return; |
| } |
| delta = 1; |
| } else { |
| keys = (int)Bytes::get_Java_u4(aligned_bcp + jintSize); |
| if (keys < 0) { |
| verify_error(bci, "number of keys in lookupswitch less than 0"); |
| return; |
| } |
| delta = 2; |
| // Make sure that the lookupswitch items are sorted |
| for (int i = 0; i < (keys - 1); i++) { |
| jint this_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i)*jintSize); |
| jint next_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i+2)*jintSize); |
| if (this_key >= next_key) { |
| verify_error(bci, "Bad lookupswitch instruction"); |
| return; |
| } |
| } |
| } |
| int target = bci + default_offset; |
| stackmap_table->check_jump_target(current_frame, target, CHECK_VERIFY(this)); |
| for (int i = 0; i < keys; i++) { |
| target = bci + (jint)Bytes::get_Java_u4(aligned_bcp+(3+i*delta)*jintSize); |
| stackmap_table->check_jump_target( |
| current_frame, target, CHECK_VERIFY(this)); |
| } |
| } |
| |
| bool ClassVerifier::name_in_supers( |
| symbolOop ref_name, instanceKlassHandle current) { |
| klassOop super = current->super(); |
| while (super != NULL) { |
| if (super->klass_part()->name() == ref_name) { |
| return true; |
| } |
| super = super->klass_part()->super(); |
| } |
| return false; |
| } |
| |
| void ClassVerifier::verify_field_instructions(RawBytecodeStream* bcs, |
| StackMapFrame* current_frame, |
| constantPoolHandle cp, |
| TRAPS) { |
| u2 index = bcs->get_index_u2(); |
| verify_cp_type(index, cp, 1 << JVM_CONSTANT_Fieldref, CHECK_VERIFY(this)); |
| |
| // Get field name and signature |
| symbolHandle field_name = symbolHandle(THREAD, cp->name_ref_at(index)); |
| symbolHandle field_sig = symbolHandle(THREAD, cp->signature_ref_at(index)); |
| |
| if (!SignatureVerifier::is_valid_type_signature(field_sig)) { |
| class_format_error( |
| "Invalid signature for field in class %s referenced " |
| "from constant pool index %d", _klass->external_name(), index); |
| return; |
| } |
| |
| // Get referenced class type |
| VerificationType ref_class_type = cp_ref_index_to_type( |
| index, cp, CHECK_VERIFY(this)); |
| if (!ref_class_type.is_object()) { |
| verify_error( |
| "Expecting reference to class in class %s at constant pool index %d", |
| _klass->external_name(), index); |
| return; |
| } |
| VerificationType target_class_type = ref_class_type; |
| |
| assert(sizeof(VerificationType) == sizeof(uintptr_t), |
| "buffer type must match VerificationType size"); |
| uintptr_t field_type_buffer[2]; |
| VerificationType* field_type = (VerificationType*)field_type_buffer; |
| // If we make a VerificationType[2] array directly, the compiler calls |
| // to the c-runtime library to do the allocation instead of just |
| // stack allocating it. Plus it would run constructors. This shows up |
| // in performance profiles. |
| |
| SignatureStream sig_stream(field_sig, false); |
| VerificationType stack_object_type; |
| int n = change_sig_to_verificationType( |
| &sig_stream, field_type, CHECK_VERIFY(this)); |
| u2 bci = bcs->bci(); |
| bool is_assignable; |
| switch (bcs->raw_code()) { |
| case Bytecodes::_getstatic: { |
| for (int i = 0; i < n; i++) { |
| current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); |
| } |
| break; |
| } |
| case Bytecodes::_putstatic: { |
| for (int i = n - 1; i >= 0; i--) { |
| current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); |
| } |
| break; |
| } |
| case Bytecodes::_getfield: { |
| stack_object_type = current_frame->pop_stack( |
| target_class_type, CHECK_VERIFY(this)); |
| for (int i = 0; i < n; i++) { |
| current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); |
| } |
| goto check_protected; |
| } |
| case Bytecodes::_putfield: { |
| for (int i = n - 1; i >= 0; i--) { |
| current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); |
| } |
| stack_object_type = current_frame->pop_stack(CHECK_VERIFY(this)); |
| |
| // The JVMS 2nd edition allows field initialization before the superclass |
| // initializer, if the field is defined within the current class. |
| fieldDescriptor fd; |
| if (stack_object_type == VerificationType::uninitialized_this_type() && |
| target_class_type.equals(current_type()) && |
| _klass->find_local_field(field_name(), field_sig(), &fd)) { |
| stack_object_type = current_type(); |
| } |
| is_assignable = target_class_type.is_assignable_from( |
| stack_object_type, current_class(), CHECK_VERIFY(this)); |
| if (!is_assignable) { |
| verify_error(bci, "Bad type on operand stack in putfield"); |
| return; |
| } |
| } |
| check_protected: { |
| if (_this_type == stack_object_type) |
| break; // stack_object_type must be assignable to _current_class_type |
| symbolHandle ref_class_name = symbolHandle(THREAD, |
| cp->klass_name_at(cp->klass_ref_index_at(index))); |
| if (!name_in_supers(ref_class_name(), current_class())) |
| // stack_object_type must be assignable to _current_class_type since: |
| // 1. stack_object_type must be assignable to ref_class. |
| // 2. ref_class must be _current_class or a subclass of it. It can't |
| // be a superclass of it. See revised JVMS 5.4.4. |
| break; |
| |
| klassOop ref_class_oop = load_class(ref_class_name, CHECK); |
| if (is_protected_access(current_class(), ref_class_oop, field_name(), |
| field_sig(), false)) { |
| // It's protected access, check if stack object is assignable to |
| // current class. |
| is_assignable = current_type().is_assignable_from( |
| stack_object_type, current_class(), CHECK_VERIFY(this)); |
| if (!is_assignable) { |
| verify_error(bci, "Bad access to protected data in getfield"); |
| return; |
| } |
| } |
| break; |
| } |
| default: ShouldNotReachHere(); |
| } |
| } |
| |
| void ClassVerifier::verify_invoke_init( |
| RawBytecodeStream* bcs, VerificationType ref_class_type, |
| StackMapFrame* current_frame, u4 code_length, bool *this_uninit, |
| constantPoolHandle cp, TRAPS) { |
| u2 bci = bcs->bci(); |
| VerificationType type = current_frame->pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| if (type == VerificationType::uninitialized_this_type()) { |
| // The method must be an <init> method of either this class, or one of its |
| // superclasses |
| if (ref_class_type.name() != current_class()->name() && |
| !name_in_supers(ref_class_type.name(), current_class())) { |
| verify_error(bci, "Bad <init> method call"); |
| return; |
| } |
| current_frame->initialize_object(type, current_type()); |
| *this_uninit = true; |
| } else if (type.is_uninitialized()) { |
| u2 new_offset = type.bci(); |
| address new_bcp = bcs->bcp() - bci + new_offset; |
| if (new_offset > (code_length - 3) || (*new_bcp) != Bytecodes::_new) { |
| verify_error(new_offset, "Expecting new instruction"); |
| return; |
| } |
| u2 new_class_index = Bytes::get_Java_u2(new_bcp + 1); |
| verify_cp_class_type(new_class_index, cp, CHECK_VERIFY(this)); |
| |
| // The method must be an <init> method of the indicated class |
| VerificationType new_class_type = cp_index_to_type( |
| new_class_index, cp, CHECK_VERIFY(this)); |
| if (!new_class_type.equals(ref_class_type)) { |
| verify_error(bci, "Call to wrong <init> method"); |
| return; |
| } |
| // According to the VM spec, if the referent class is a superclass of the |
| // current class, and is in a different runtime package, and the method is |
| // protected, then the objectref must be the current class or a subclass |
| // of the current class. |
| VerificationType objectref_type = new_class_type; |
| if (name_in_supers(ref_class_type.name(), current_class())) { |
| klassOop ref_klass = load_class( |
| ref_class_type.name(), CHECK_VERIFY(this)); |
| methodOop m = instanceKlass::cast(ref_klass)->uncached_lookup_method( |
| vmSymbols::object_initializer_name(), |
| cp->signature_ref_at(bcs->get_index_u2())); |
| instanceKlassHandle mh(THREAD, m->method_holder()); |
| if (m->is_protected() && !mh->is_same_class_package(_klass())) { |
| bool assignable = current_type().is_assignable_from( |
| objectref_type, current_class(), CHECK_VERIFY(this)); |
| if (!assignable) { |
| verify_error(bci, "Bad access to protected <init> method"); |
| return; |
| } |
| } |
| } |
| current_frame->initialize_object(type, new_class_type); |
| } else { |
| verify_error(bci, "Bad operand type when invoking <init>"); |
| return; |
| } |
| } |
| |
| void ClassVerifier::verify_invoke_instructions( |
| RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, |
| bool *this_uninit, VerificationType return_type, |
| constantPoolHandle cp, TRAPS) { |
| // Make sure the constant pool item is the right type |
| u2 index = bcs->get_index_u2(); |
| Bytecodes::Code opcode = bcs->raw_code(); |
| unsigned int types = (opcode == Bytecodes::_invokeinterface |
| ? 1 << JVM_CONSTANT_InterfaceMethodref |
| : opcode == Bytecodes::_invokedynamic |
| ? 1 << JVM_CONSTANT_NameAndType |
| : 1 << JVM_CONSTANT_Methodref); |
| verify_cp_type(index, cp, types, CHECK_VERIFY(this)); |
| |
| // Get method name and signature |
| symbolHandle method_name(THREAD, cp->name_ref_at(index)); |
| symbolHandle method_sig(THREAD, cp->signature_ref_at(index)); |
| |
| if (!SignatureVerifier::is_valid_method_signature(method_sig)) { |
| class_format_error( |
| "Invalid method signature in class %s referenced " |
| "from constant pool index %d", _klass->external_name(), index); |
| return; |
| } |
| |
| // Get referenced class type |
| VerificationType ref_class_type; |
| if (opcode == Bytecodes::_invokedynamic) { |
| if (!EnableInvokeDynamic || |
| _klass->major_version() < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { |
| class_format_error( |
| (!EnableInvokeDynamic ? |
| "invokedynamic instructions not enabled in this JVM" : |
| "invokedynamic instructions not supported by this class file version"), |
| _klass->external_name()); |
| return; |
| } |
| } else { |
| ref_class_type = cp_ref_index_to_type(index, cp, CHECK_VERIFY(this)); |
| } |
| |
| // For a small signature length, we just allocate 128 bytes instead |
| // of parsing the signature once to find its size. |
| // -3 is for '(', ')' and return descriptor; multiply by 2 is for |
| // longs/doubles to be consertive. |
| assert(sizeof(VerificationType) == sizeof(uintptr_t), |
| "buffer type must match VerificationType size"); |
| uintptr_t on_stack_sig_types_buffer[128]; |
| // If we make a VerificationType[128] array directly, the compiler calls |
| // to the c-runtime library to do the allocation instead of just |
| // stack allocating it. Plus it would run constructors. This shows up |
| // in performance profiles. |
| |
| VerificationType* sig_types; |
| int size = (method_sig->utf8_length() - 3) * 2; |
| if (size > 128) { |
| // Long and double occupies two slots here. |
| ArgumentSizeComputer size_it(method_sig); |
| size = size_it.size(); |
| sig_types = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, VerificationType, size); |
| } else{ |
| sig_types = (VerificationType*)on_stack_sig_types_buffer; |
| } |
| SignatureStream sig_stream(method_sig); |
| int sig_i = 0; |
| while (!sig_stream.at_return_type()) { |
| sig_i += change_sig_to_verificationType( |
| &sig_stream, &sig_types[sig_i], CHECK_VERIFY(this)); |
| sig_stream.next(); |
| } |
| int nargs = sig_i; |
| |
| #ifdef ASSERT |
| { |
| ArgumentSizeComputer size_it(method_sig); |
| assert(nargs == size_it.size(), "Argument sizes do not match"); |
| assert(nargs <= (method_sig->utf8_length() - 3) * 2, "estimate of max size isn't conservative enough"); |
| } |
| #endif |
| |
| // Check instruction operands |
| u2 bci = bcs->bci(); |
| if (opcode == Bytecodes::_invokeinterface) { |
| address bcp = bcs->bcp(); |
| // 4905268: count operand in invokeinterface should be nargs+1, not nargs. |
| // JSR202 spec: The count operand of an invokeinterface instruction is valid if it is |
| // the difference between the size of the operand stack before and after the instruction |
| // executes. |
| if (*(bcp+3) != (nargs+1)) { |
| verify_error(bci, "Inconsistent args count operand in invokeinterface"); |
| return; |
| } |
| if (*(bcp+4) != 0) { |
| verify_error(bci, "Fourth operand byte of invokeinterface must be zero"); |
| return; |
| } |
| } |
| |
| if (opcode == Bytecodes::_invokedynamic) { |
| address bcp = bcs->bcp(); |
| if (*(bcp+3) != 0 || *(bcp+4) != 0) { |
| verify_error(bci, "Third and fourth operand bytes of invokedynamic must be zero"); |
| return; |
| } |
| } |
| |
| if (method_name->byte_at(0) == '<') { |
| // Make sure <init> can only be invoked by invokespecial |
| if (opcode != Bytecodes::_invokespecial || |
| method_name() != vmSymbols::object_initializer_name()) { |
| verify_error(bci, "Illegal call to internal method"); |
| return; |
| } |
| } else if (opcode == Bytecodes::_invokespecial |
| && !ref_class_type.equals(current_type()) |
| && !ref_class_type.equals(VerificationType::reference_type( |
| current_class()->super()->klass_part()->name()))) { |
| bool subtype = ref_class_type.is_assignable_from( |
| current_type(), current_class(), CHECK_VERIFY(this)); |
| if (!subtype) { |
| verify_error(bci, "Bad invokespecial instruction: " |
| "current class isn't assignable to reference class."); |
| return; |
| } |
| } |
| // Match method descriptor with operand stack |
| for (int i = nargs - 1; i >= 0; i--) { // Run backwards |
| current_frame->pop_stack(sig_types[i], CHECK_VERIFY(this)); |
| } |
| // Check objectref on operand stack |
| if (opcode != Bytecodes::_invokestatic && |
| opcode != Bytecodes::_invokedynamic) { |
| if (method_name() == vmSymbols::object_initializer_name()) { // <init> method |
| verify_invoke_init(bcs, ref_class_type, current_frame, |
| code_length, this_uninit, cp, CHECK_VERIFY(this)); |
| } else { // other methods |
| // Ensures that target class is assignable to method class. |
| if (opcode == Bytecodes::_invokespecial) { |
| current_frame->pop_stack(current_type(), CHECK_VERIFY(this)); |
| } else if (opcode == Bytecodes::_invokevirtual) { |
| VerificationType stack_object_type = |
| current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); |
| if (current_type() != stack_object_type) { |
| assert(cp->cache() == NULL, "not rewritten yet"); |
| symbolHandle ref_class_name = symbolHandle(THREAD, |
| cp->klass_name_at(cp->klass_ref_index_at(index))); |
| // See the comments in verify_field_instructions() for |
| // the rationale behind this. |
| if (name_in_supers(ref_class_name(), current_class())) { |
| klassOop ref_class = load_class(ref_class_name, CHECK); |
| if (is_protected_access( |
| _klass, ref_class, method_name(), method_sig(), true)) { |
| // It's protected access, check if stack object is |
| // assignable to current class. |
| bool is_assignable = current_type().is_assignable_from( |
| stack_object_type, current_class(), CHECK_VERIFY(this)); |
| if (!is_assignable) { |
| if (ref_class_type.name() == vmSymbols::java_lang_Object() |
| && stack_object_type.is_array() |
| && method_name() == vmSymbols::clone_name()) { |
| // Special case: arrays pretend to implement public Object |
| // clone(). |
| } else { |
| verify_error(bci, |
| "Bad access to protected data in invokevirtual"); |
| return; |
| } |
| } |
| } |
| } |
| } |
| } else { |
| assert(opcode == Bytecodes::_invokeinterface, "Unexpected opcode encountered"); |
| current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); |
| } |
| } |
| } |
| // Push the result type. |
| if (sig_stream.type() != T_VOID) { |
| if (method_name() == vmSymbols::object_initializer_name()) { |
| // <init> method must have a void return type |
| verify_error(bci, "Return type must be void in <init> method"); |
| return; |
| } |
| VerificationType return_type[2]; |
| int n = change_sig_to_verificationType( |
| &sig_stream, return_type, CHECK_VERIFY(this)); |
| for (int i = 0; i < n; i++) { |
| current_frame->push_stack(return_type[i], CHECK_VERIFY(this)); // push types backwards |
| } |
| } |
| } |
| |
| VerificationType ClassVerifier::get_newarray_type( |
| u2 index, u2 bci, TRAPS) { |
| const char* from_bt[] = { |
| NULL, NULL, NULL, NULL, "[Z", "[C", "[F", "[D", "[B", "[S", "[I", "[J", |
| }; |
| if (index < T_BOOLEAN || index > T_LONG) { |
| verify_error(bci, "Illegal newarray instruction"); |
| return VerificationType::bogus_type(); |
| } |
| |
| // from_bt[index] contains the array signature which has a length of 2 |
| symbolHandle sig = oopFactory::new_symbol_handle( |
| from_bt[index], 2, CHECK_(VerificationType::bogus_type())); |
| return VerificationType::reference_type(sig); |
| } |
| |
| void ClassVerifier::verify_anewarray( |
| u2 index, constantPoolHandle cp, StackMapFrame* current_frame, TRAPS) { |
| verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
| current_frame->pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| |
| VerificationType component_type = |
| cp_index_to_type(index, cp, CHECK_VERIFY(this)); |
| ResourceMark rm(THREAD); |
| int length; |
| char* arr_sig_str; |
| if (component_type.is_array()) { // it's an array |
| const char* component_name = component_type.name()->as_utf8(); |
| // add one dimension to component |
| length = (int)strlen(component_name) + 1; |
| arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); |
| arr_sig_str[0] = '['; |
| strncpy(&arr_sig_str[1], component_name, length - 1); |
| } else { // it's an object or interface |
| const char* component_name = component_type.name()->as_utf8(); |
| // add one dimension to component with 'L' prepended and ';' postpended. |
| length = (int)strlen(component_name) + 3; |
| arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); |
| arr_sig_str[0] = '['; |
| arr_sig_str[1] = 'L'; |
| strncpy(&arr_sig_str[2], component_name, length - 2); |
| arr_sig_str[length - 1] = ';'; |
| } |
| symbolHandle arr_sig = oopFactory::new_symbol_handle( |
| arr_sig_str, length, CHECK_VERIFY(this)); |
| VerificationType new_array_type = VerificationType::reference_type(arr_sig); |
| current_frame->push_stack(new_array_type, CHECK_VERIFY(this)); |
| } |
| |
| void ClassVerifier::verify_iload(u2 index, StackMapFrame* current_frame, TRAPS) { |
| current_frame->get_local( |
| index, VerificationType::integer_type(), CHECK_VERIFY(this)); |
| current_frame->push_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| } |
| |
| void ClassVerifier::verify_lload(u2 index, StackMapFrame* current_frame, TRAPS) { |
| current_frame->get_local_2( |
| index, VerificationType::long_type(), |
| VerificationType::long2_type(), CHECK_VERIFY(this)); |
| current_frame->push_stack_2( |
| VerificationType::long_type(), |
| VerificationType::long2_type(), CHECK_VERIFY(this)); |
| } |
| |
| void ClassVerifier::verify_fload(u2 index, StackMapFrame* current_frame, TRAPS) { |
| current_frame->get_local( |
| index, VerificationType::float_type(), CHECK_VERIFY(this)); |
| current_frame->push_stack( |
| VerificationType::float_type(), CHECK_VERIFY(this)); |
| } |
| |
| void ClassVerifier::verify_dload(u2 index, StackMapFrame* current_frame, TRAPS) { |
| current_frame->get_local_2( |
| index, VerificationType::double_type(), |
| VerificationType::double2_type(), CHECK_VERIFY(this)); |
| current_frame->push_stack_2( |
| VerificationType::double_type(), |
| VerificationType::double2_type(), CHECK_VERIFY(this)); |
| } |
| |
| void ClassVerifier::verify_aload(u2 index, StackMapFrame* current_frame, TRAPS) { |
| VerificationType type = current_frame->get_local( |
| index, VerificationType::reference_check(), CHECK_VERIFY(this)); |
| current_frame->push_stack(type, CHECK_VERIFY(this)); |
| } |
| |
| void ClassVerifier::verify_istore(u2 index, StackMapFrame* current_frame, TRAPS) { |
| current_frame->pop_stack( |
| VerificationType::integer_type(), CHECK_VERIFY(this)); |
| current_frame->set_local( |
| index, VerificationType::integer_type(), CHECK_VERIFY(this)); |
| } |
| |
| void ClassVerifier::verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS) { |
| current_frame->pop_stack_2( |
| VerificationType::long2_type(), |
| VerificationType::long_type(), CHECK_VERIFY(this)); |
| current_frame->set_local_2( |
| index, VerificationType::long_type(), |
| VerificationType::long2_type(), CHECK_VERIFY(this)); |
| } |
| |
| void ClassVerifier::verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS) { |
| current_frame->pop_stack(VerificationType::float_type(), CHECK_VERIFY(this)); |
| current_frame->set_local( |
| index, VerificationType::float_type(), CHECK_VERIFY(this)); |
| } |
| |
| void ClassVerifier::verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS) { |
| current_frame->pop_stack_2( |
| VerificationType::double2_type(), |
| VerificationType::double_type(), CHECK_VERIFY(this)); |
| current_frame->set_local_2( |
| index, VerificationType::double_type(), |
| VerificationType::double2_type(), CHECK_VERIFY(this)); |
| } |
| |
| void ClassVerifier::verify_astore(u2 index, StackMapFrame* current_frame, TRAPS) { |
| VerificationType type = current_frame->pop_stack( |
| VerificationType::reference_check(), CHECK_VERIFY(this)); |
| current_frame->set_local(index, type, CHECK_VERIFY(this)); |
| } |
| |
| void ClassVerifier::verify_iinc(u2 index, StackMapFrame* current_frame, TRAPS) { |
| VerificationType type = current_frame->get_local( |
| index, VerificationType::integer_type(), CHECK_VERIFY(this)); |
| current_frame->set_local(index, type, CHECK_VERIFY(this)); |
| } |
| |
| void ClassVerifier::verify_return_value( |
| VerificationType return_type, VerificationType type, u2 bci, TRAPS) { |
| if (return_type == VerificationType::bogus_type()) { |
| verify_error(bci, "Method expects a return value"); |
| return; |
| } |
| bool match = return_type.is_assignable_from(type, _klass, CHECK_VERIFY(this)); |
| if (!match) { |
| verify_error(bci, "Bad return type"); |
| return; |
| } |
| } |