--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/classfile/verifier.cpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,2197 @@
+/*
+ * Copyright 1998-2006 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+# include "incls/_precompiled.incl"
+# include "incls/_verifier.cpp.incl"
+
+// 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) {
+ return class_loader == NULL ?
+ 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, 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)) {
+ 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 (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) {
+ symbolOop name = klass->name();
+ klassOop refl_magic_klass = SystemDictionary::reflect_magic_klass();
+
+ return (should_verify_for(klass->class_loader()) &&
+ // return if the class is a bootstrapping class
+ // 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++) {
+ 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));
+ }
+}
+
+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()) {
+ 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(), ¤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_big(), ¤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 :
+ 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_big();
+ 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_big(), 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_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_big();
+ 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_big();
+ 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_big();
+ 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.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. Get the original index for the tag check
+ constantPoolCacheOop cache = cp->cache();
+ if (cache != NULL &&
+ ((types == (1 << JVM_CONSTANT_InterfaceMethodref)) ||
+ (types == (1 << JVM_CONSTANT_Methodref)) ||
+ (types == (1 << JVM_CONSTANT_Fieldref)))) {
+ int native_index = index;
+ if (Bytes::is_Java_byte_ordering_different()) {
+ native_index = Bytes::swap_u2(index);
+ }
+ assert((native_index >= 0) && (native_index < cache->length()),
+ "Must be a legal index into the cp cache");
+ index = cache->entry_at(native_index)->constant_pool_index();
+ }
+
+ 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);
+ 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() || 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 {
+ 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->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_big();
+ 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->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
+ klassOop oop = current_class()();
+ Klass* klass = oop->klass_part();
+ while (klass != NULL && ref_class_type.name() != klass->name()) {
+ klass = klass->super()->klass_part();
+ }
+ if (klass == NULL) {
+ 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_big()));
+ 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_big();
+ Bytecodes::Code opcode = bcs->code();
+ unsigned int types = (opcode == Bytecodes::_invokeinterface
+ ? 1 << JVM_CONSTANT_InterfaceMethodref
+ : 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 = 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 (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) {
+ 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;
+ }
+}