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/*
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* Copyright 1998-2006 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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# include "incls/_precompiled.incl"
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# include "incls/_verifier.cpp.incl"
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// Access to external entry for VerifyClassCodes - old byte code verifier
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extern "C" {
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typedef jboolean (*verify_byte_codes_fn_t)(JNIEnv *, jclass, char *, jint);
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typedef jboolean (*verify_byte_codes_fn_new_t)(JNIEnv *, jclass, char *, jint, jint);
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}
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static void* volatile _verify_byte_codes_fn = NULL;
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static volatile jint _is_new_verify_byte_codes_fn = (jint) true;
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static void* verify_byte_codes_fn() {
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if (_verify_byte_codes_fn == NULL) {
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void *lib_handle = os::native_java_library();
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void *func = hpi::dll_lookup(lib_handle, "VerifyClassCodesForMajorVersion");
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OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func);
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if (func == NULL) {
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OrderAccess::release_store(&_is_new_verify_byte_codes_fn, false);
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func = hpi::dll_lookup(lib_handle, "VerifyClassCodes");
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OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func);
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}
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}
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return (void*)_verify_byte_codes_fn;
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}
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// Methods in Verifier
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bool Verifier::should_verify_for(oop class_loader) {
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return class_loader == NULL ?
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BytecodeVerificationLocal : BytecodeVerificationRemote;
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}
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bool Verifier::relax_verify_for(oop loader) {
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bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
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bool need_verify =
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// verifyAll
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(BytecodeVerificationLocal && BytecodeVerificationRemote) ||
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// verifyRemote
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(!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
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return !need_verify;
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}
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bool Verifier::verify(instanceKlassHandle klass, Verifier::Mode mode, TRAPS) {
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ResourceMark rm(THREAD);
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HandleMark hm;
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symbolHandle exception_name;
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const size_t message_buffer_len = klass->name()->utf8_length() + 1024;
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char* message_buffer = NEW_RESOURCE_ARRAY(char, message_buffer_len);
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const char* klassName = klass->external_name();
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// If the class should be verified, first see if we can use the split
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// verifier. If not, or if verification fails and FailOverToOldVerifier
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// is set, then call the inference verifier.
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if (is_eligible_for_verification(klass)) {
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if (TraceClassInitialization) {
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tty->print_cr("Start class verification for: %s", klassName);
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}
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if (UseSplitVerifier &&
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klass->major_version() >= STACKMAP_ATTRIBUTE_MAJOR_VERSION) {
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ClassVerifier split_verifier(
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klass, message_buffer, message_buffer_len, THREAD);
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split_verifier.verify_class(THREAD);
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exception_name = split_verifier.result();
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if (FailOverToOldVerifier && !HAS_PENDING_EXCEPTION &&
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(exception_name == vmSymbols::java_lang_VerifyError() ||
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exception_name == vmSymbols::java_lang_ClassFormatError())) {
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if (TraceClassInitialization) {
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tty->print_cr(
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"Fail over class verification to old verifier for: %s", klassName);
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}
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exception_name = inference_verify(
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klass, message_buffer, message_buffer_len, THREAD);
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}
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} else {
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exception_name = inference_verify(
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klass, message_buffer, message_buffer_len, THREAD);
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}
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if (TraceClassInitialization) {
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if (HAS_PENDING_EXCEPTION) {
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tty->print("Verification for %s has", klassName);
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tty->print_cr(" exception pending %s ",
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instanceKlass::cast(PENDING_EXCEPTION->klass())->external_name());
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} else if (!exception_name.is_null()) {
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tty->print_cr("Verification for %s failed", klassName);
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}
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tty->print_cr("End class verification for: %s", klassName);
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}
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}
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if (HAS_PENDING_EXCEPTION) {
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return false; // use the existing exception
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} else if (exception_name.is_null()) {
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return true; // verifcation succeeded
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} else { // VerifyError or ClassFormatError to be created and thrown
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ResourceMark rm(THREAD);
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instanceKlassHandle kls =
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SystemDictionary::resolve_or_fail(exception_name, true, CHECK_false);
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while (!kls.is_null()) {
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if (kls == klass) {
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// If the class being verified is the exception we're creating
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// or one of it's superclasses, we're in trouble and are going
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// to infinitely recurse when we try to initialize the exception.
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// So bail out here by throwing the preallocated VM error.
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THROW_OOP_(Universe::virtual_machine_error_instance(), false);
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}
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kls = kls->super();
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}
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message_buffer[message_buffer_len - 1] = '\0'; // just to be sure
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THROW_MSG_(exception_name, message_buffer, false);
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}
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}
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bool Verifier::is_eligible_for_verification(instanceKlassHandle klass) {
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symbolOop name = klass->name();
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klassOop refl_magic_klass = SystemDictionary::reflect_magic_klass();
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return (should_verify_for(klass->class_loader()) &&
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// return if the class is a bootstrapping class
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// We need to skip the following four for bootstraping
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name != vmSymbols::java_lang_Object() &&
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name != vmSymbols::java_lang_Class() &&
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name != vmSymbols::java_lang_String() &&
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name != vmSymbols::java_lang_Throwable() &&
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// Can not verify the bytecodes for shared classes because they have
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// already been rewritten to contain constant pool cache indices,
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// which the verifier can't understand.
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// Shared classes shouldn't have stackmaps either.
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!klass()->is_shared() &&
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// As of the fix for 4486457 we disable verification for all of the
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// dynamically-generated bytecodes associated with the 1.4
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// reflection implementation, not just those associated with
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// sun/reflect/SerializationConstructorAccessor.
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// NOTE: this is called too early in the bootstrapping process to be
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// guarded by Universe::is_gte_jdk14x_version()/UseNewReflection.
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(refl_magic_klass == NULL ||
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!klass->is_subtype_of(refl_magic_klass) ||
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VerifyReflectionBytecodes)
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);
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}
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symbolHandle Verifier::inference_verify(
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instanceKlassHandle klass, char* message, size_t message_len, TRAPS) {
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JavaThread* thread = (JavaThread*)THREAD;
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JNIEnv *env = thread->jni_environment();
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void* verify_func = verify_byte_codes_fn();
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if (verify_func == NULL) {
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jio_snprintf(message, message_len, "Could not link verifier");
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return vmSymbols::java_lang_VerifyError();
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}
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ResourceMark rm(THREAD);
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if (ClassVerifier::_verify_verbose) {
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tty->print_cr("Verifying class %s with old format", klass->external_name());
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}
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jclass cls = (jclass) JNIHandles::make_local(env, klass->java_mirror());
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jint result;
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{
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HandleMark hm(thread);
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ThreadToNativeFromVM ttn(thread);
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// ThreadToNativeFromVM takes care of changing thread_state, so safepoint
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// code knows that we have left the VM
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if (_is_new_verify_byte_codes_fn) {
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verify_byte_codes_fn_new_t func =
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CAST_TO_FN_PTR(verify_byte_codes_fn_new_t, verify_func);
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result = (*func)(env, cls, message, (int)message_len,
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klass->major_version());
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} else {
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verify_byte_codes_fn_t func =
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CAST_TO_FN_PTR(verify_byte_codes_fn_t, verify_func);
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result = (*func)(env, cls, message, (int)message_len);
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}
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}
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JNIHandles::destroy_local(cls);
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// These numbers are chosen so that VerifyClassCodes interface doesn't need
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// to be changed (still return jboolean (unsigned char)), and result is
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// 1 when verification is passed.
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symbolHandle nh(NULL);
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if (result == 0) {
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return vmSymbols::java_lang_VerifyError();
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} else if (result == 1) {
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return nh; // verified.
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} else if (result == 2) {
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THROW_MSG_(vmSymbols::java_lang_OutOfMemoryError(), message, nh);
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} else if (result == 3) {
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return vmSymbols::java_lang_ClassFormatError();
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} else {
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ShouldNotReachHere();
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return nh;
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}
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}
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// Methods in ClassVerifier
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bool ClassVerifier::_verify_verbose = false;
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ClassVerifier::ClassVerifier(
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instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS)
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: _thread(THREAD), _exception_type(symbolHandle()), _message(msg),
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_message_buffer_len(msg_len), _klass(klass) {
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_this_type = VerificationType::reference_type(klass->name());
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}
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ClassVerifier::~ClassVerifier() {
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}
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void ClassVerifier::verify_class(TRAPS) {
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if (_verify_verbose) {
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tty->print_cr("Verifying class %s with new format",
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_klass->external_name());
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}
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objArrayHandle methods(THREAD, _klass->methods());
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int num_methods = methods->length();
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for (int index = 0; index < num_methods; index++) {
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methodOop m = (methodOop)methods->obj_at(index);
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if (m->is_native() || m->is_abstract()) {
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// If m is native or abstract, skip it. It is checked in class file
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// parser that methods do not override a final method.
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continue;
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}
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verify_method(methodHandle(THREAD, m), CHECK_VERIFY(this));
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}
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}
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void ClassVerifier::verify_method(methodHandle m, TRAPS) {
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ResourceMark rm(THREAD);
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_method = m; // initialize _method
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if (_verify_verbose) {
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tty->print_cr("Verifying method %s", m->name_and_sig_as_C_string());
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}
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const char* bad_type_msg = "Bad type on operand stack in %s";
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int32_t max_stack = m->max_stack();
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int32_t max_locals = m->max_locals();
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constantPoolHandle cp(THREAD, m->constants());
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if (!SignatureVerifier::is_valid_method_signature(m->signature())) {
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class_format_error("Invalid method signature");
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return;
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}
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// Initial stack map frame: offset is 0, stack is initially empty.
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StackMapFrame current_frame(max_locals, max_stack, this);
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// Set initial locals
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VerificationType return_type = current_frame.set_locals_from_arg(
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m, current_type(), CHECK_VERIFY(this));
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int32_t stackmap_index = 0; // index to the stackmap array
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u4 code_length = m->code_size();
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// Scan the bytecode and map each instruction's start offset to a number.
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char* code_data = generate_code_data(m, code_length, CHECK_VERIFY(this));
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int ex_min = code_length;
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int ex_max = -1;
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// Look through each item on the exception table. Each of the fields must refer
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// to a legal instruction.
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verify_exception_handler_table(
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code_length, code_data, ex_min, ex_max, CHECK_VERIFY(this));
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// Look through each entry on the local variable table and make sure
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// its range of code array offsets is valid. (4169817)
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if (m->has_localvariable_table()) {
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verify_local_variable_table(code_length, code_data, CHECK_VERIFY(this));
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}
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typeArrayHandle stackmap_data(THREAD, m->stackmap_data());
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StackMapStream stream(stackmap_data);
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StackMapReader reader(this, &stream, code_data, code_length, THREAD);
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StackMapTable stackmap_table(&reader, ¤t_frame, max_locals, max_stack,
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code_data, code_length, CHECK_VERIFY(this));
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if (_verify_verbose) {
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stackmap_table.print();
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}
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RawBytecodeStream bcs(m);
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// Scan the byte code linearly from the start to the end
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bool no_control_flow = false; // Set to true when there is no direct control
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// flow from current instruction to the next
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// instruction in sequence
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Bytecodes::Code opcode;
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while (!bcs.is_last_bytecode()) {
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opcode = bcs.raw_next();
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u2 bci = bcs.bci();
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// Set current frame's offset to bci
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current_frame.set_offset(bci);
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// Make sure every offset in stackmap table point to the beginning to
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// an instruction. Match current_frame to stackmap_table entry with
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// the same offset if exists.
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stackmap_index = verify_stackmap_table(
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stackmap_index, bci, ¤t_frame, &stackmap_table,
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no_control_flow, CHECK_VERIFY(this));
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bool this_uninit = false; // Set to true when invokespecial <init> initialized 'this'
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// Merge with the next instruction
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{
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u2 index;
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int target;
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VerificationType type, type2;
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VerificationType atype;
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#ifndef PRODUCT
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if (_verify_verbose) {
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current_frame.print();
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tty->print_cr("offset = %d, opcode = %s", bci, Bytecodes::name(opcode));
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}
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#endif
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// Make sure wide instruction is in correct format
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if (bcs.is_wide()) {
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if (opcode != Bytecodes::_iinc && opcode != Bytecodes::_iload &&
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opcode != Bytecodes::_aload && opcode != Bytecodes::_lload &&
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opcode != Bytecodes::_istore && opcode != Bytecodes::_astore &&
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opcode != Bytecodes::_lstore && opcode != Bytecodes::_fload &&
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opcode != Bytecodes::_dload && opcode != Bytecodes::_fstore &&
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opcode != Bytecodes::_dstore) {
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verify_error(bci, "Bad wide instruction");
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return;
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}
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}
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switch (opcode) {
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case Bytecodes::_nop :
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no_control_flow = false; break;
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case Bytecodes::_aconst_null :
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current_frame.push_stack(
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VerificationType::null_type(), CHECK_VERIFY(this));
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no_control_flow = false; break;
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case Bytecodes::_iconst_m1 :
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case Bytecodes::_iconst_0 :
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case Bytecodes::_iconst_1 :
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case Bytecodes::_iconst_2 :
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case Bytecodes::_iconst_3 :
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case Bytecodes::_iconst_4 :
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case Bytecodes::_iconst_5 :
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current_frame.push_stack(
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VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
386 |
no_control_flow = false; break;
|
|
387 |
case Bytecodes::_lconst_0 :
|
|
388 |
case Bytecodes::_lconst_1 :
|
|
389 |
current_frame.push_stack_2(
|
|
390 |
VerificationType::long_type(),
|
|
391 |
VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
392 |
no_control_flow = false; break;
|
|
393 |
case Bytecodes::_fconst_0 :
|
|
394 |
case Bytecodes::_fconst_1 :
|
|
395 |
case Bytecodes::_fconst_2 :
|
|
396 |
current_frame.push_stack(
|
|
397 |
VerificationType::float_type(), CHECK_VERIFY(this));
|
|
398 |
no_control_flow = false; break;
|
|
399 |
case Bytecodes::_dconst_0 :
|
|
400 |
case Bytecodes::_dconst_1 :
|
|
401 |
current_frame.push_stack_2(
|
|
402 |
VerificationType::double_type(),
|
|
403 |
VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
404 |
no_control_flow = false; break;
|
|
405 |
case Bytecodes::_sipush :
|
|
406 |
case Bytecodes::_bipush :
|
|
407 |
current_frame.push_stack(
|
|
408 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
409 |
no_control_flow = false; break;
|
|
410 |
case Bytecodes::_ldc :
|
|
411 |
verify_ldc(
|
|
412 |
opcode, bcs.get_index(), ¤t_frame,
|
|
413 |
cp, bci, CHECK_VERIFY(this));
|
|
414 |
no_control_flow = false; break;
|
|
415 |
case Bytecodes::_ldc_w :
|
|
416 |
case Bytecodes::_ldc2_w :
|
|
417 |
verify_ldc(
|
|
418 |
opcode, bcs.get_index_big(), ¤t_frame,
|
|
419 |
cp, bci, CHECK_VERIFY(this));
|
|
420 |
no_control_flow = false; break;
|
|
421 |
case Bytecodes::_iload :
|
|
422 |
verify_iload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
|
|
423 |
no_control_flow = false; break;
|
|
424 |
case Bytecodes::_iload_0 :
|
|
425 |
case Bytecodes::_iload_1 :
|
|
426 |
case Bytecodes::_iload_2 :
|
|
427 |
case Bytecodes::_iload_3 :
|
|
428 |
index = opcode - Bytecodes::_iload_0;
|
|
429 |
verify_iload(index, ¤t_frame, CHECK_VERIFY(this));
|
|
430 |
no_control_flow = false; break;
|
|
431 |
case Bytecodes::_lload :
|
|
432 |
verify_lload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
|
|
433 |
no_control_flow = false; break;
|
|
434 |
case Bytecodes::_lload_0 :
|
|
435 |
case Bytecodes::_lload_1 :
|
|
436 |
case Bytecodes::_lload_2 :
|
|
437 |
case Bytecodes::_lload_3 :
|
|
438 |
index = opcode - Bytecodes::_lload_0;
|
|
439 |
verify_lload(index, ¤t_frame, CHECK_VERIFY(this));
|
|
440 |
no_control_flow = false; break;
|
|
441 |
case Bytecodes::_fload :
|
|
442 |
verify_fload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
|
|
443 |
no_control_flow = false; break;
|
|
444 |
case Bytecodes::_fload_0 :
|
|
445 |
case Bytecodes::_fload_1 :
|
|
446 |
case Bytecodes::_fload_2 :
|
|
447 |
case Bytecodes::_fload_3 :
|
|
448 |
index = opcode - Bytecodes::_fload_0;
|
|
449 |
verify_fload(index, ¤t_frame, CHECK_VERIFY(this));
|
|
450 |
no_control_flow = false; break;
|
|
451 |
case Bytecodes::_dload :
|
|
452 |
verify_dload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
|
|
453 |
no_control_flow = false; break;
|
|
454 |
case Bytecodes::_dload_0 :
|
|
455 |
case Bytecodes::_dload_1 :
|
|
456 |
case Bytecodes::_dload_2 :
|
|
457 |
case Bytecodes::_dload_3 :
|
|
458 |
index = opcode - Bytecodes::_dload_0;
|
|
459 |
verify_dload(index, ¤t_frame, CHECK_VERIFY(this));
|
|
460 |
no_control_flow = false; break;
|
|
461 |
case Bytecodes::_aload :
|
|
462 |
verify_aload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
|
|
463 |
no_control_flow = false; break;
|
|
464 |
case Bytecodes::_aload_0 :
|
|
465 |
case Bytecodes::_aload_1 :
|
|
466 |
case Bytecodes::_aload_2 :
|
|
467 |
case Bytecodes::_aload_3 :
|
|
468 |
index = opcode - Bytecodes::_aload_0;
|
|
469 |
verify_aload(index, ¤t_frame, CHECK_VERIFY(this));
|
|
470 |
no_control_flow = false; break;
|
|
471 |
case Bytecodes::_iaload :
|
|
472 |
type = current_frame.pop_stack(
|
|
473 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
474 |
atype = current_frame.pop_stack(
|
|
475 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
476 |
if (!atype.is_int_array()) {
|
|
477 |
verify_error(bci, bad_type_msg, "iaload");
|
|
478 |
return;
|
|
479 |
}
|
|
480 |
current_frame.push_stack(
|
|
481 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
482 |
no_control_flow = false; break;
|
|
483 |
case Bytecodes::_baload :
|
|
484 |
type = current_frame.pop_stack(
|
|
485 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
486 |
atype = current_frame.pop_stack(
|
|
487 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
488 |
if (!atype.is_bool_array() && !atype.is_byte_array()) {
|
|
489 |
verify_error(bci, bad_type_msg, "baload");
|
|
490 |
return;
|
|
491 |
}
|
|
492 |
current_frame.push_stack(
|
|
493 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
494 |
no_control_flow = false; break;
|
|
495 |
case Bytecodes::_caload :
|
|
496 |
type = current_frame.pop_stack(
|
|
497 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
498 |
atype = current_frame.pop_stack(
|
|
499 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
500 |
if (!atype.is_char_array()) {
|
|
501 |
verify_error(bci, bad_type_msg, "caload");
|
|
502 |
return;
|
|
503 |
}
|
|
504 |
current_frame.push_stack(
|
|
505 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
506 |
no_control_flow = false; break;
|
|
507 |
case Bytecodes::_saload :
|
|
508 |
type = current_frame.pop_stack(
|
|
509 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
510 |
atype = current_frame.pop_stack(
|
|
511 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
512 |
if (!atype.is_short_array()) {
|
|
513 |
verify_error(bci, bad_type_msg, "saload");
|
|
514 |
return;
|
|
515 |
}
|
|
516 |
current_frame.push_stack(
|
|
517 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
518 |
no_control_flow = false; break;
|
|
519 |
case Bytecodes::_laload :
|
|
520 |
type = current_frame.pop_stack(
|
|
521 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
522 |
atype = current_frame.pop_stack(
|
|
523 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
524 |
if (!atype.is_long_array()) {
|
|
525 |
verify_error(bci, bad_type_msg, "laload");
|
|
526 |
return;
|
|
527 |
}
|
|
528 |
current_frame.push_stack_2(
|
|
529 |
VerificationType::long_type(),
|
|
530 |
VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
531 |
no_control_flow = false; break;
|
|
532 |
case Bytecodes::_faload :
|
|
533 |
type = current_frame.pop_stack(
|
|
534 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
535 |
atype = current_frame.pop_stack(
|
|
536 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
537 |
if (!atype.is_float_array()) {
|
|
538 |
verify_error(bci, bad_type_msg, "faload");
|
|
539 |
return;
|
|
540 |
}
|
|
541 |
current_frame.push_stack(
|
|
542 |
VerificationType::float_type(), CHECK_VERIFY(this));
|
|
543 |
no_control_flow = false; break;
|
|
544 |
case Bytecodes::_daload :
|
|
545 |
type = current_frame.pop_stack(
|
|
546 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
547 |
atype = current_frame.pop_stack(
|
|
548 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
549 |
if (!atype.is_double_array()) {
|
|
550 |
verify_error(bci, bad_type_msg, "daload");
|
|
551 |
return;
|
|
552 |
}
|
|
553 |
current_frame.push_stack_2(
|
|
554 |
VerificationType::double_type(),
|
|
555 |
VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
556 |
no_control_flow = false; break;
|
|
557 |
case Bytecodes::_aaload : {
|
|
558 |
type = current_frame.pop_stack(
|
|
559 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
560 |
atype = current_frame.pop_stack(
|
|
561 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
562 |
if (!atype.is_reference_array()) {
|
|
563 |
verify_error(bci, bad_type_msg, "aaload");
|
|
564 |
return;
|
|
565 |
}
|
|
566 |
if (atype.is_null()) {
|
|
567 |
current_frame.push_stack(
|
|
568 |
VerificationType::null_type(), CHECK_VERIFY(this));
|
|
569 |
} else {
|
|
570 |
VerificationType component =
|
|
571 |
atype.get_component(CHECK_VERIFY(this));
|
|
572 |
current_frame.push_stack(component, CHECK_VERIFY(this));
|
|
573 |
}
|
|
574 |
no_control_flow = false; break;
|
|
575 |
}
|
|
576 |
case Bytecodes::_istore :
|
|
577 |
verify_istore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
|
|
578 |
no_control_flow = false; break;
|
|
579 |
case Bytecodes::_istore_0 :
|
|
580 |
case Bytecodes::_istore_1 :
|
|
581 |
case Bytecodes::_istore_2 :
|
|
582 |
case Bytecodes::_istore_3 :
|
|
583 |
index = opcode - Bytecodes::_istore_0;
|
|
584 |
verify_istore(index, ¤t_frame, CHECK_VERIFY(this));
|
|
585 |
no_control_flow = false; break;
|
|
586 |
case Bytecodes::_lstore :
|
|
587 |
verify_lstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
|
|
588 |
no_control_flow = false; break;
|
|
589 |
case Bytecodes::_lstore_0 :
|
|
590 |
case Bytecodes::_lstore_1 :
|
|
591 |
case Bytecodes::_lstore_2 :
|
|
592 |
case Bytecodes::_lstore_3 :
|
|
593 |
index = opcode - Bytecodes::_lstore_0;
|
|
594 |
verify_lstore(index, ¤t_frame, CHECK_VERIFY(this));
|
|
595 |
no_control_flow = false; break;
|
|
596 |
case Bytecodes::_fstore :
|
|
597 |
verify_fstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
|
|
598 |
no_control_flow = false; break;
|
|
599 |
case Bytecodes::_fstore_0 :
|
|
600 |
case Bytecodes::_fstore_1 :
|
|
601 |
case Bytecodes::_fstore_2 :
|
|
602 |
case Bytecodes::_fstore_3 :
|
|
603 |
index = opcode - Bytecodes::_fstore_0;
|
|
604 |
verify_fstore(index, ¤t_frame, CHECK_VERIFY(this));
|
|
605 |
no_control_flow = false; break;
|
|
606 |
case Bytecodes::_dstore :
|
|
607 |
verify_dstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
|
|
608 |
no_control_flow = false; break;
|
|
609 |
case Bytecodes::_dstore_0 :
|
|
610 |
case Bytecodes::_dstore_1 :
|
|
611 |
case Bytecodes::_dstore_2 :
|
|
612 |
case Bytecodes::_dstore_3 :
|
|
613 |
index = opcode - Bytecodes::_dstore_0;
|
|
614 |
verify_dstore(index, ¤t_frame, CHECK_VERIFY(this));
|
|
615 |
no_control_flow = false; break;
|
|
616 |
case Bytecodes::_astore :
|
|
617 |
verify_astore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
|
|
618 |
no_control_flow = false; break;
|
|
619 |
case Bytecodes::_astore_0 :
|
|
620 |
case Bytecodes::_astore_1 :
|
|
621 |
case Bytecodes::_astore_2 :
|
|
622 |
case Bytecodes::_astore_3 :
|
|
623 |
index = opcode - Bytecodes::_astore_0;
|
|
624 |
verify_astore(index, ¤t_frame, CHECK_VERIFY(this));
|
|
625 |
no_control_flow = false; break;
|
|
626 |
case Bytecodes::_iastore :
|
|
627 |
type = current_frame.pop_stack(
|
|
628 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
629 |
type2 = current_frame.pop_stack(
|
|
630 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
631 |
atype = current_frame.pop_stack(
|
|
632 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
633 |
if (!atype.is_int_array()) {
|
|
634 |
verify_error(bci, bad_type_msg, "iastore");
|
|
635 |
return;
|
|
636 |
}
|
|
637 |
no_control_flow = false; break;
|
|
638 |
case Bytecodes::_bastore :
|
|
639 |
type = current_frame.pop_stack(
|
|
640 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
641 |
type2 = current_frame.pop_stack(
|
|
642 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
643 |
atype = current_frame.pop_stack(
|
|
644 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
645 |
if (!atype.is_bool_array() && !atype.is_byte_array()) {
|
|
646 |
verify_error(bci, bad_type_msg, "bastore");
|
|
647 |
return;
|
|
648 |
}
|
|
649 |
no_control_flow = false; break;
|
|
650 |
case Bytecodes::_castore :
|
|
651 |
current_frame.pop_stack(
|
|
652 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
653 |
current_frame.pop_stack(
|
|
654 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
655 |
atype = current_frame.pop_stack(
|
|
656 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
657 |
if (!atype.is_char_array()) {
|
|
658 |
verify_error(bci, bad_type_msg, "castore");
|
|
659 |
return;
|
|
660 |
}
|
|
661 |
no_control_flow = false; break;
|
|
662 |
case Bytecodes::_sastore :
|
|
663 |
current_frame.pop_stack(
|
|
664 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
665 |
current_frame.pop_stack(
|
|
666 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
667 |
atype = current_frame.pop_stack(
|
|
668 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
669 |
if (!atype.is_short_array()) {
|
|
670 |
verify_error(bci, bad_type_msg, "sastore");
|
|
671 |
return;
|
|
672 |
}
|
|
673 |
no_control_flow = false; break;
|
|
674 |
case Bytecodes::_lastore :
|
|
675 |
current_frame.pop_stack_2(
|
|
676 |
VerificationType::long2_type(),
|
|
677 |
VerificationType::long_type(), CHECK_VERIFY(this));
|
|
678 |
current_frame.pop_stack(
|
|
679 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
680 |
atype = current_frame.pop_stack(
|
|
681 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
682 |
if (!atype.is_long_array()) {
|
|
683 |
verify_error(bci, bad_type_msg, "lastore");
|
|
684 |
return;
|
|
685 |
}
|
|
686 |
no_control_flow = false; break;
|
|
687 |
case Bytecodes::_fastore :
|
|
688 |
current_frame.pop_stack(
|
|
689 |
VerificationType::float_type(), CHECK_VERIFY(this));
|
|
690 |
current_frame.pop_stack
|
|
691 |
(VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
692 |
atype = current_frame.pop_stack(
|
|
693 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
694 |
if (!atype.is_float_array()) {
|
|
695 |
verify_error(bci, bad_type_msg, "fastore");
|
|
696 |
return;
|
|
697 |
}
|
|
698 |
no_control_flow = false; break;
|
|
699 |
case Bytecodes::_dastore :
|
|
700 |
current_frame.pop_stack_2(
|
|
701 |
VerificationType::double2_type(),
|
|
702 |
VerificationType::double_type(), CHECK_VERIFY(this));
|
|
703 |
current_frame.pop_stack(
|
|
704 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
705 |
atype = current_frame.pop_stack(
|
|
706 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
707 |
if (!atype.is_double_array()) {
|
|
708 |
verify_error(bci, bad_type_msg, "dastore");
|
|
709 |
return;
|
|
710 |
}
|
|
711 |
no_control_flow = false; break;
|
|
712 |
case Bytecodes::_aastore :
|
|
713 |
type = current_frame.pop_stack(
|
|
714 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
715 |
type2 = current_frame.pop_stack(
|
|
716 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
717 |
atype = current_frame.pop_stack(
|
|
718 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
719 |
// more type-checking is done at runtime
|
|
720 |
if (!atype.is_reference_array()) {
|
|
721 |
verify_error(bci, bad_type_msg, "aastore");
|
|
722 |
return;
|
|
723 |
}
|
|
724 |
// 4938384: relaxed constraint in JVMS 3nd edition.
|
|
725 |
no_control_flow = false; break;
|
|
726 |
case Bytecodes::_pop :
|
|
727 |
current_frame.pop_stack(
|
|
728 |
VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
729 |
no_control_flow = false; break;
|
|
730 |
case Bytecodes::_pop2 :
|
|
731 |
type = current_frame.pop_stack(CHECK_VERIFY(this));
|
|
732 |
if (type.is_category1()) {
|
|
733 |
current_frame.pop_stack(
|
|
734 |
VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
735 |
} else if (type.is_category2_2nd()) {
|
|
736 |
current_frame.pop_stack(
|
|
737 |
VerificationType::category2_check(), CHECK_VERIFY(this));
|
|
738 |
} else {
|
|
739 |
verify_error(bci, bad_type_msg, "pop2");
|
|
740 |
return;
|
|
741 |
}
|
|
742 |
no_control_flow = false; break;
|
|
743 |
case Bytecodes::_dup :
|
|
744 |
type = current_frame.pop_stack(
|
|
745 |
VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
746 |
current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
747 |
current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
748 |
no_control_flow = false; break;
|
|
749 |
case Bytecodes::_dup_x1 :
|
|
750 |
type = current_frame.pop_stack(
|
|
751 |
VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
752 |
type2 = current_frame.pop_stack(
|
|
753 |
VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
754 |
current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
755 |
current_frame.push_stack(type2, CHECK_VERIFY(this));
|
|
756 |
current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
757 |
no_control_flow = false; break;
|
|
758 |
case Bytecodes::_dup_x2 :
|
|
759 |
{
|
|
760 |
VerificationType type3;
|
|
761 |
type = current_frame.pop_stack(
|
|
762 |
VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
763 |
type2 = current_frame.pop_stack(CHECK_VERIFY(this));
|
|
764 |
if (type2.is_category1()) {
|
|
765 |
type3 = current_frame.pop_stack(
|
|
766 |
VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
767 |
} else if (type2.is_category2_2nd()) {
|
|
768 |
type3 = current_frame.pop_stack(
|
|
769 |
VerificationType::category2_check(), CHECK_VERIFY(this));
|
|
770 |
} else {
|
|
771 |
verify_error(bci, bad_type_msg, "dup_x2");
|
|
772 |
return;
|
|
773 |
}
|
|
774 |
current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
775 |
current_frame.push_stack(type3, CHECK_VERIFY(this));
|
|
776 |
current_frame.push_stack(type2, CHECK_VERIFY(this));
|
|
777 |
current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
778 |
no_control_flow = false; break;
|
|
779 |
}
|
|
780 |
case Bytecodes::_dup2 :
|
|
781 |
type = current_frame.pop_stack(CHECK_VERIFY(this));
|
|
782 |
if (type.is_category1()) {
|
|
783 |
type2 = current_frame.pop_stack(
|
|
784 |
VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
785 |
} else if (type.is_category2_2nd()) {
|
|
786 |
type2 = current_frame.pop_stack(
|
|
787 |
VerificationType::category2_check(), CHECK_VERIFY(this));
|
|
788 |
} else {
|
|
789 |
verify_error(bci, bad_type_msg, "dup2");
|
|
790 |
return;
|
|
791 |
}
|
|
792 |
current_frame.push_stack(type2, CHECK_VERIFY(this));
|
|
793 |
current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
794 |
current_frame.push_stack(type2, CHECK_VERIFY(this));
|
|
795 |
current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
796 |
no_control_flow = false; break;
|
|
797 |
case Bytecodes::_dup2_x1 :
|
|
798 |
{
|
|
799 |
VerificationType type3;
|
|
800 |
type = current_frame.pop_stack(CHECK_VERIFY(this));
|
|
801 |
if (type.is_category1()) {
|
|
802 |
type2 = current_frame.pop_stack(
|
|
803 |
VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
804 |
} else if(type.is_category2_2nd()) {
|
|
805 |
type2 = current_frame.pop_stack
|
|
806 |
(VerificationType::category2_check(), CHECK_VERIFY(this));
|
|
807 |
} else {
|
|
808 |
verify_error(bci, bad_type_msg, "dup2_x1");
|
|
809 |
return;
|
|
810 |
}
|
|
811 |
type3 = current_frame.pop_stack(
|
|
812 |
VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
813 |
current_frame.push_stack(type2, CHECK_VERIFY(this));
|
|
814 |
current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
815 |
current_frame.push_stack(type3, CHECK_VERIFY(this));
|
|
816 |
current_frame.push_stack(type2, CHECK_VERIFY(this));
|
|
817 |
current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
818 |
no_control_flow = false; break;
|
|
819 |
}
|
|
820 |
case Bytecodes::_dup2_x2 :
|
|
821 |
{
|
|
822 |
VerificationType type3, type4;
|
|
823 |
type = current_frame.pop_stack(CHECK_VERIFY(this));
|
|
824 |
if (type.is_category1()) {
|
|
825 |
type2 = current_frame.pop_stack(
|
|
826 |
VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
827 |
} else if (type.is_category2_2nd()) {
|
|
828 |
type2 = current_frame.pop_stack(
|
|
829 |
VerificationType::category2_check(), CHECK_VERIFY(this));
|
|
830 |
} else {
|
|
831 |
verify_error(bci, bad_type_msg, "dup2_x2");
|
|
832 |
return;
|
|
833 |
}
|
|
834 |
type3 = current_frame.pop_stack(CHECK_VERIFY(this));
|
|
835 |
if (type3.is_category1()) {
|
|
836 |
type4 = current_frame.pop_stack(
|
|
837 |
VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
838 |
} else if (type3.is_category2_2nd()) {
|
|
839 |
type4 = current_frame.pop_stack(
|
|
840 |
VerificationType::category2_check(), CHECK_VERIFY(this));
|
|
841 |
} else {
|
|
842 |
verify_error(bci, bad_type_msg, "dup2_x2");
|
|
843 |
return;
|
|
844 |
}
|
|
845 |
current_frame.push_stack(type2, CHECK_VERIFY(this));
|
|
846 |
current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
847 |
current_frame.push_stack(type4, CHECK_VERIFY(this));
|
|
848 |
current_frame.push_stack(type3, CHECK_VERIFY(this));
|
|
849 |
current_frame.push_stack(type2, CHECK_VERIFY(this));
|
|
850 |
current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
851 |
no_control_flow = false; break;
|
|
852 |
}
|
|
853 |
case Bytecodes::_swap :
|
|
854 |
type = current_frame.pop_stack(
|
|
855 |
VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
856 |
type2 = current_frame.pop_stack(
|
|
857 |
VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
858 |
current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
859 |
current_frame.push_stack(type2, CHECK_VERIFY(this));
|
|
860 |
no_control_flow = false; break;
|
|
861 |
case Bytecodes::_iadd :
|
|
862 |
case Bytecodes::_isub :
|
|
863 |
case Bytecodes::_imul :
|
|
864 |
case Bytecodes::_idiv :
|
|
865 |
case Bytecodes::_irem :
|
|
866 |
case Bytecodes::_ishl :
|
|
867 |
case Bytecodes::_ishr :
|
|
868 |
case Bytecodes::_iushr :
|
|
869 |
case Bytecodes::_ior :
|
|
870 |
case Bytecodes::_ixor :
|
|
871 |
case Bytecodes::_iand :
|
|
872 |
current_frame.pop_stack(
|
|
873 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
874 |
// fall through
|
|
875 |
case Bytecodes::_ineg :
|
|
876 |
current_frame.pop_stack(
|
|
877 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
878 |
current_frame.push_stack(
|
|
879 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
880 |
no_control_flow = false; break;
|
|
881 |
case Bytecodes::_ladd :
|
|
882 |
case Bytecodes::_lsub :
|
|
883 |
case Bytecodes::_lmul :
|
|
884 |
case Bytecodes::_ldiv :
|
|
885 |
case Bytecodes::_lrem :
|
|
886 |
case Bytecodes::_land :
|
|
887 |
case Bytecodes::_lor :
|
|
888 |
case Bytecodes::_lxor :
|
|
889 |
current_frame.pop_stack_2(
|
|
890 |
VerificationType::long2_type(),
|
|
891 |
VerificationType::long_type(), CHECK_VERIFY(this));
|
|
892 |
// fall through
|
|
893 |
case Bytecodes::_lneg :
|
|
894 |
current_frame.pop_stack_2(
|
|
895 |
VerificationType::long2_type(),
|
|
896 |
VerificationType::long_type(), CHECK_VERIFY(this));
|
|
897 |
current_frame.push_stack_2(
|
|
898 |
VerificationType::long_type(),
|
|
899 |
VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
900 |
no_control_flow = false; break;
|
|
901 |
case Bytecodes::_lshl :
|
|
902 |
case Bytecodes::_lshr :
|
|
903 |
case Bytecodes::_lushr :
|
|
904 |
current_frame.pop_stack(
|
|
905 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
906 |
current_frame.pop_stack_2(
|
|
907 |
VerificationType::long2_type(),
|
|
908 |
VerificationType::long_type(), CHECK_VERIFY(this));
|
|
909 |
current_frame.push_stack_2(
|
|
910 |
VerificationType::long_type(),
|
|
911 |
VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
912 |
no_control_flow = false; break;
|
|
913 |
case Bytecodes::_fadd :
|
|
914 |
case Bytecodes::_fsub :
|
|
915 |
case Bytecodes::_fmul :
|
|
916 |
case Bytecodes::_fdiv :
|
|
917 |
case Bytecodes::_frem :
|
|
918 |
current_frame.pop_stack(
|
|
919 |
VerificationType::float_type(), CHECK_VERIFY(this));
|
|
920 |
// fall through
|
|
921 |
case Bytecodes::_fneg :
|
|
922 |
current_frame.pop_stack(
|
|
923 |
VerificationType::float_type(), CHECK_VERIFY(this));
|
|
924 |
current_frame.push_stack(
|
|
925 |
VerificationType::float_type(), CHECK_VERIFY(this));
|
|
926 |
no_control_flow = false; break;
|
|
927 |
case Bytecodes::_dadd :
|
|
928 |
case Bytecodes::_dsub :
|
|
929 |
case Bytecodes::_dmul :
|
|
930 |
case Bytecodes::_ddiv :
|
|
931 |
case Bytecodes::_drem :
|
|
932 |
current_frame.pop_stack_2(
|
|
933 |
VerificationType::double2_type(),
|
|
934 |
VerificationType::double_type(), CHECK_VERIFY(this));
|
|
935 |
// fall through
|
|
936 |
case Bytecodes::_dneg :
|
|
937 |
current_frame.pop_stack_2(
|
|
938 |
VerificationType::double2_type(),
|
|
939 |
VerificationType::double_type(), CHECK_VERIFY(this));
|
|
940 |
current_frame.push_stack_2(
|
|
941 |
VerificationType::double_type(),
|
|
942 |
VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
943 |
no_control_flow = false; break;
|
|
944 |
case Bytecodes::_iinc :
|
|
945 |
verify_iinc(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
|
|
946 |
no_control_flow = false; break;
|
|
947 |
case Bytecodes::_i2l :
|
|
948 |
type = current_frame.pop_stack(
|
|
949 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
950 |
current_frame.push_stack_2(
|
|
951 |
VerificationType::long_type(),
|
|
952 |
VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
953 |
no_control_flow = false; break;
|
|
954 |
case Bytecodes::_l2i :
|
|
955 |
current_frame.pop_stack_2(
|
|
956 |
VerificationType::long2_type(),
|
|
957 |
VerificationType::long_type(), CHECK_VERIFY(this));
|
|
958 |
current_frame.push_stack(
|
|
959 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
960 |
no_control_flow = false; break;
|
|
961 |
case Bytecodes::_i2f :
|
|
962 |
current_frame.pop_stack(
|
|
963 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
964 |
current_frame.push_stack(
|
|
965 |
VerificationType::float_type(), CHECK_VERIFY(this));
|
|
966 |
no_control_flow = false; break;
|
|
967 |
case Bytecodes::_i2d :
|
|
968 |
current_frame.pop_stack(
|
|
969 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
970 |
current_frame.push_stack_2(
|
|
971 |
VerificationType::double_type(),
|
|
972 |
VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
973 |
no_control_flow = false; break;
|
|
974 |
case Bytecodes::_l2f :
|
|
975 |
current_frame.pop_stack_2(
|
|
976 |
VerificationType::long2_type(),
|
|
977 |
VerificationType::long_type(), CHECK_VERIFY(this));
|
|
978 |
current_frame.push_stack(
|
|
979 |
VerificationType::float_type(), CHECK_VERIFY(this));
|
|
980 |
no_control_flow = false; break;
|
|
981 |
case Bytecodes::_l2d :
|
|
982 |
current_frame.pop_stack_2(
|
|
983 |
VerificationType::long2_type(),
|
|
984 |
VerificationType::long_type(), CHECK_VERIFY(this));
|
|
985 |
current_frame.push_stack_2(
|
|
986 |
VerificationType::double_type(),
|
|
987 |
VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
988 |
no_control_flow = false; break;
|
|
989 |
case Bytecodes::_f2i :
|
|
990 |
current_frame.pop_stack(
|
|
991 |
VerificationType::float_type(), CHECK_VERIFY(this));
|
|
992 |
current_frame.push_stack(
|
|
993 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
994 |
no_control_flow = false; break;
|
|
995 |
case Bytecodes::_f2l :
|
|
996 |
current_frame.pop_stack(
|
|
997 |
VerificationType::float_type(), CHECK_VERIFY(this));
|
|
998 |
current_frame.push_stack_2(
|
|
999 |
VerificationType::long_type(),
|
|
1000 |
VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
1001 |
no_control_flow = false; break;
|
|
1002 |
case Bytecodes::_f2d :
|
|
1003 |
current_frame.pop_stack(
|
|
1004 |
VerificationType::float_type(), CHECK_VERIFY(this));
|
|
1005 |
current_frame.push_stack_2(
|
|
1006 |
VerificationType::double_type(),
|
|
1007 |
VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
1008 |
no_control_flow = false; break;
|
|
1009 |
case Bytecodes::_d2i :
|
|
1010 |
current_frame.pop_stack_2(
|
|
1011 |
VerificationType::double2_type(),
|
|
1012 |
VerificationType::double_type(), CHECK_VERIFY(this));
|
|
1013 |
current_frame.push_stack(
|
|
1014 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1015 |
no_control_flow = false; break;
|
|
1016 |
case Bytecodes::_d2l :
|
|
1017 |
current_frame.pop_stack_2(
|
|
1018 |
VerificationType::double2_type(),
|
|
1019 |
VerificationType::double_type(), CHECK_VERIFY(this));
|
|
1020 |
current_frame.push_stack_2(
|
|
1021 |
VerificationType::long_type(),
|
|
1022 |
VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
1023 |
no_control_flow = false; break;
|
|
1024 |
case Bytecodes::_d2f :
|
|
1025 |
current_frame.pop_stack_2(
|
|
1026 |
VerificationType::double2_type(),
|
|
1027 |
VerificationType::double_type(), CHECK_VERIFY(this));
|
|
1028 |
current_frame.push_stack(
|
|
1029 |
VerificationType::float_type(), CHECK_VERIFY(this));
|
|
1030 |
no_control_flow = false; break;
|
|
1031 |
case Bytecodes::_i2b :
|
|
1032 |
case Bytecodes::_i2c :
|
|
1033 |
case Bytecodes::_i2s :
|
|
1034 |
current_frame.pop_stack(
|
|
1035 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1036 |
current_frame.push_stack(
|
|
1037 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1038 |
no_control_flow = false; break;
|
|
1039 |
case Bytecodes::_lcmp :
|
|
1040 |
current_frame.pop_stack_2(
|
|
1041 |
VerificationType::long2_type(),
|
|
1042 |
VerificationType::long_type(), CHECK_VERIFY(this));
|
|
1043 |
current_frame.pop_stack_2(
|
|
1044 |
VerificationType::long2_type(),
|
|
1045 |
VerificationType::long_type(), CHECK_VERIFY(this));
|
|
1046 |
current_frame.push_stack(
|
|
1047 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1048 |
no_control_flow = false; break;
|
|
1049 |
case Bytecodes::_fcmpl :
|
|
1050 |
case Bytecodes::_fcmpg :
|
|
1051 |
current_frame.pop_stack(
|
|
1052 |
VerificationType::float_type(), CHECK_VERIFY(this));
|
|
1053 |
current_frame.pop_stack(
|
|
1054 |
VerificationType::float_type(), CHECK_VERIFY(this));
|
|
1055 |
current_frame.push_stack(
|
|
1056 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1057 |
no_control_flow = false; break;
|
|
1058 |
case Bytecodes::_dcmpl :
|
|
1059 |
case Bytecodes::_dcmpg :
|
|
1060 |
current_frame.pop_stack_2(
|
|
1061 |
VerificationType::double2_type(),
|
|
1062 |
VerificationType::double_type(), CHECK_VERIFY(this));
|
|
1063 |
current_frame.pop_stack_2(
|
|
1064 |
VerificationType::double2_type(),
|
|
1065 |
VerificationType::double_type(), CHECK_VERIFY(this));
|
|
1066 |
current_frame.push_stack(
|
|
1067 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1068 |
no_control_flow = false; break;
|
|
1069 |
case Bytecodes::_if_icmpeq:
|
|
1070 |
case Bytecodes::_if_icmpne:
|
|
1071 |
case Bytecodes::_if_icmplt:
|
|
1072 |
case Bytecodes::_if_icmpge:
|
|
1073 |
case Bytecodes::_if_icmpgt:
|
|
1074 |
case Bytecodes::_if_icmple:
|
|
1075 |
current_frame.pop_stack(
|
|
1076 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1077 |
// fall through
|
|
1078 |
case Bytecodes::_ifeq:
|
|
1079 |
case Bytecodes::_ifne:
|
|
1080 |
case Bytecodes::_iflt:
|
|
1081 |
case Bytecodes::_ifge:
|
|
1082 |
case Bytecodes::_ifgt:
|
|
1083 |
case Bytecodes::_ifle:
|
|
1084 |
current_frame.pop_stack(
|
|
1085 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1086 |
target = bcs.dest();
|
|
1087 |
stackmap_table.check_jump_target(
|
|
1088 |
¤t_frame, target, CHECK_VERIFY(this));
|
|
1089 |
no_control_flow = false; break;
|
|
1090 |
case Bytecodes::_if_acmpeq :
|
|
1091 |
case Bytecodes::_if_acmpne :
|
|
1092 |
current_frame.pop_stack(
|
|
1093 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
1094 |
// fall through
|
|
1095 |
case Bytecodes::_ifnull :
|
|
1096 |
case Bytecodes::_ifnonnull :
|
|
1097 |
current_frame.pop_stack(
|
|
1098 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
1099 |
target = bcs.dest();
|
|
1100 |
stackmap_table.check_jump_target
|
|
1101 |
(¤t_frame, target, CHECK_VERIFY(this));
|
|
1102 |
no_control_flow = false; break;
|
|
1103 |
case Bytecodes::_goto :
|
|
1104 |
target = bcs.dest();
|
|
1105 |
stackmap_table.check_jump_target(
|
|
1106 |
¤t_frame, target, CHECK_VERIFY(this));
|
|
1107 |
no_control_flow = true; break;
|
|
1108 |
case Bytecodes::_goto_w :
|
|
1109 |
target = bcs.dest_w();
|
|
1110 |
stackmap_table.check_jump_target(
|
|
1111 |
¤t_frame, target, CHECK_VERIFY(this));
|
|
1112 |
no_control_flow = true; break;
|
|
1113 |
case Bytecodes::_tableswitch :
|
|
1114 |
case Bytecodes::_lookupswitch :
|
|
1115 |
verify_switch(
|
|
1116 |
&bcs, code_length, code_data, ¤t_frame,
|
|
1117 |
&stackmap_table, CHECK_VERIFY(this));
|
|
1118 |
no_control_flow = true; break;
|
|
1119 |
case Bytecodes::_ireturn :
|
|
1120 |
type = current_frame.pop_stack(
|
|
1121 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1122 |
verify_return_value(return_type, type, bci, CHECK_VERIFY(this));
|
|
1123 |
no_control_flow = true; break;
|
|
1124 |
case Bytecodes::_lreturn :
|
|
1125 |
type2 = current_frame.pop_stack(
|
|
1126 |
VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
1127 |
type = current_frame.pop_stack(
|
|
1128 |
VerificationType::long_type(), CHECK_VERIFY(this));
|
|
1129 |
verify_return_value(return_type, type, bci, CHECK_VERIFY(this));
|
|
1130 |
no_control_flow = true; break;
|
|
1131 |
case Bytecodes::_freturn :
|
|
1132 |
type = current_frame.pop_stack(
|
|
1133 |
VerificationType::float_type(), CHECK_VERIFY(this));
|
|
1134 |
verify_return_value(return_type, type, bci, CHECK_VERIFY(this));
|
|
1135 |
no_control_flow = true; break;
|
|
1136 |
case Bytecodes::_dreturn :
|
|
1137 |
type2 = current_frame.pop_stack(
|
|
1138 |
VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
1139 |
type = current_frame.pop_stack(
|
|
1140 |
VerificationType::double_type(), CHECK_VERIFY(this));
|
|
1141 |
verify_return_value(return_type, type, bci, CHECK_VERIFY(this));
|
|
1142 |
no_control_flow = true; break;
|
|
1143 |
case Bytecodes::_areturn :
|
|
1144 |
type = current_frame.pop_stack(
|
|
1145 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
1146 |
verify_return_value(return_type, type, bci, CHECK_VERIFY(this));
|
|
1147 |
no_control_flow = true; break;
|
|
1148 |
case Bytecodes::_return :
|
|
1149 |
if (return_type != VerificationType::bogus_type()) {
|
|
1150 |
verify_error(bci, "Method expects no return value");
|
|
1151 |
return;
|
|
1152 |
}
|
|
1153 |
// Make sure "this" has been initialized if current method is an
|
|
1154 |
// <init>
|
|
1155 |
if (_method->name() == vmSymbols::object_initializer_name() &&
|
|
1156 |
current_frame.flag_this_uninit()) {
|
|
1157 |
verify_error(bci,
|
|
1158 |
"Constructor must call super() or this() before return");
|
|
1159 |
return;
|
|
1160 |
}
|
|
1161 |
no_control_flow = true; break;
|
|
1162 |
case Bytecodes::_getstatic :
|
|
1163 |
case Bytecodes::_putstatic :
|
|
1164 |
case Bytecodes::_getfield :
|
|
1165 |
case Bytecodes::_putfield :
|
|
1166 |
verify_field_instructions(
|
|
1167 |
&bcs, ¤t_frame, cp, CHECK_VERIFY(this));
|
|
1168 |
no_control_flow = false; break;
|
|
1169 |
case Bytecodes::_invokevirtual :
|
|
1170 |
case Bytecodes::_invokespecial :
|
|
1171 |
case Bytecodes::_invokestatic :
|
|
1172 |
verify_invoke_instructions(
|
|
1173 |
&bcs, code_length, ¤t_frame,
|
|
1174 |
&this_uninit, return_type, cp, CHECK_VERIFY(this));
|
|
1175 |
no_control_flow = false; break;
|
|
1176 |
case Bytecodes::_invokeinterface :
|
|
1177 |
verify_invoke_instructions(
|
|
1178 |
&bcs, code_length, ¤t_frame,
|
|
1179 |
&this_uninit, return_type, cp, CHECK_VERIFY(this));
|
|
1180 |
no_control_flow = false; break;
|
|
1181 |
case Bytecodes::_new :
|
|
1182 |
{
|
|
1183 |
index = bcs.get_index_big();
|
|
1184 |
verify_cp_class_type(index, cp, CHECK_VERIFY(this));
|
|
1185 |
VerificationType new_class_type =
|
|
1186 |
cp_index_to_type(index, cp, CHECK_VERIFY(this));
|
|
1187 |
if (!new_class_type.is_object()) {
|
|
1188 |
verify_error(bci, "Illegal new instruction");
|
|
1189 |
return;
|
|
1190 |
}
|
|
1191 |
type = VerificationType::uninitialized_type(bci);
|
|
1192 |
current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
1193 |
no_control_flow = false; break;
|
|
1194 |
}
|
|
1195 |
case Bytecodes::_newarray :
|
|
1196 |
type = get_newarray_type(bcs.get_index(), bci, CHECK_VERIFY(this));
|
|
1197 |
current_frame.pop_stack(
|
|
1198 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1199 |
current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
1200 |
no_control_flow = false; break;
|
|
1201 |
case Bytecodes::_anewarray :
|
|
1202 |
verify_anewarray(
|
|
1203 |
bcs.get_index_big(), cp, ¤t_frame, CHECK_VERIFY(this));
|
|
1204 |
no_control_flow = false; break;
|
|
1205 |
case Bytecodes::_arraylength :
|
|
1206 |
type = current_frame.pop_stack(
|
|
1207 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
1208 |
if (!type.is_array()) {
|
|
1209 |
verify_error(bci, bad_type_msg, "arraylength");
|
|
1210 |
}
|
|
1211 |
current_frame.push_stack(
|
|
1212 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1213 |
no_control_flow = false; break;
|
|
1214 |
case Bytecodes::_checkcast :
|
|
1215 |
{
|
|
1216 |
index = bcs.get_index_big();
|
|
1217 |
verify_cp_class_type(index, cp, CHECK_VERIFY(this));
|
|
1218 |
current_frame.pop_stack(
|
|
1219 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
1220 |
VerificationType klass_type = cp_index_to_type(
|
|
1221 |
index, cp, CHECK_VERIFY(this));
|
|
1222 |
current_frame.push_stack(klass_type, CHECK_VERIFY(this));
|
|
1223 |
no_control_flow = false; break;
|
|
1224 |
}
|
|
1225 |
case Bytecodes::_instanceof : {
|
|
1226 |
index = bcs.get_index_big();
|
|
1227 |
verify_cp_class_type(index, cp, CHECK_VERIFY(this));
|
|
1228 |
current_frame.pop_stack(
|
|
1229 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
1230 |
current_frame.push_stack(
|
|
1231 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1232 |
no_control_flow = false; break;
|
|
1233 |
}
|
|
1234 |
case Bytecodes::_monitorenter :
|
|
1235 |
case Bytecodes::_monitorexit :
|
|
1236 |
current_frame.pop_stack(
|
|
1237 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
1238 |
no_control_flow = false; break;
|
|
1239 |
case Bytecodes::_multianewarray :
|
|
1240 |
{
|
|
1241 |
index = bcs.get_index_big();
|
|
1242 |
u2 dim = *(bcs.bcp()+3);
|
|
1243 |
verify_cp_class_type(index, cp, CHECK_VERIFY(this));
|
|
1244 |
VerificationType new_array_type =
|
|
1245 |
cp_index_to_type(index, cp, CHECK_VERIFY(this));
|
|
1246 |
if (!new_array_type.is_array()) {
|
|
1247 |
verify_error(bci,
|
|
1248 |
"Illegal constant pool index in multianewarray instruction");
|
|
1249 |
return;
|
|
1250 |
}
|
|
1251 |
if (dim < 1 || new_array_type.dimensions() < dim) {
|
|
1252 |
verify_error(bci,
|
|
1253 |
"Illegal dimension in multianewarray instruction");
|
|
1254 |
return;
|
|
1255 |
}
|
|
1256 |
for (int i = 0; i < dim; i++) {
|
|
1257 |
current_frame.pop_stack(
|
|
1258 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1259 |
}
|
|
1260 |
current_frame.push_stack(new_array_type, CHECK_VERIFY(this));
|
|
1261 |
no_control_flow = false; break;
|
|
1262 |
}
|
|
1263 |
case Bytecodes::_athrow :
|
|
1264 |
type = VerificationType::reference_type(
|
|
1265 |
vmSymbols::java_lang_Throwable());
|
|
1266 |
current_frame.pop_stack(type, CHECK_VERIFY(this));
|
|
1267 |
no_control_flow = true; break;
|
|
1268 |
default:
|
|
1269 |
// We only need to check the valid bytecodes in class file.
|
|
1270 |
// And jsr and ret are not in the new class file format in JDK1.5.
|
|
1271 |
verify_error(bci, "Bad instruction");
|
|
1272 |
no_control_flow = false;
|
|
1273 |
return;
|
|
1274 |
} // end switch
|
|
1275 |
} // end Merge with the next instruction
|
|
1276 |
|
|
1277 |
// Look for possible jump target in exception handlers and see if it
|
|
1278 |
// matches current_frame
|
|
1279 |
if (bci >= ex_min && bci < ex_max) {
|
|
1280 |
verify_exception_handler_targets(
|
|
1281 |
bci, this_uninit, ¤t_frame, &stackmap_table, CHECK_VERIFY(this));
|
|
1282 |
}
|
|
1283 |
} // end while
|
|
1284 |
|
|
1285 |
// Make sure that control flow does not fall through end of the method
|
|
1286 |
if (!no_control_flow) {
|
|
1287 |
verify_error(code_length, "Control flow falls through code end");
|
|
1288 |
return;
|
|
1289 |
}
|
|
1290 |
}
|
|
1291 |
|
|
1292 |
char* ClassVerifier::generate_code_data(methodHandle m, u4 code_length, TRAPS) {
|
|
1293 |
char* code_data = NEW_RESOURCE_ARRAY(char, code_length);
|
|
1294 |
memset(code_data, 0, sizeof(char) * code_length);
|
|
1295 |
RawBytecodeStream bcs(m);
|
|
1296 |
|
|
1297 |
while (!bcs.is_last_bytecode()) {
|
|
1298 |
if (bcs.raw_next() != Bytecodes::_illegal) {
|
|
1299 |
int bci = bcs.bci();
|
|
1300 |
if (bcs.code() == Bytecodes::_new) {
|
|
1301 |
code_data[bci] = NEW_OFFSET;
|
|
1302 |
} else {
|
|
1303 |
code_data[bci] = BYTECODE_OFFSET;
|
|
1304 |
}
|
|
1305 |
} else {
|
|
1306 |
verify_error(bcs.bci(), "Bad instruction");
|
|
1307 |
return NULL;
|
|
1308 |
}
|
|
1309 |
}
|
|
1310 |
|
|
1311 |
return code_data;
|
|
1312 |
}
|
|
1313 |
|
|
1314 |
void ClassVerifier::verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS) {
|
|
1315 |
typeArrayHandle exhandlers (THREAD, _method->exception_table());
|
|
1316 |
constantPoolHandle cp (THREAD, _method->constants());
|
|
1317 |
|
|
1318 |
if (exhandlers() != NULL) {
|
|
1319 |
for(int i = 0; i < exhandlers->length();) {
|
|
1320 |
u2 start_pc = exhandlers->int_at(i++);
|
|
1321 |
u2 end_pc = exhandlers->int_at(i++);
|
|
1322 |
u2 handler_pc = exhandlers->int_at(i++);
|
|
1323 |
if (start_pc >= code_length || code_data[start_pc] == 0) {
|
|
1324 |
class_format_error("Illegal exception table start_pc %d", start_pc);
|
|
1325 |
return;
|
|
1326 |
}
|
|
1327 |
if (end_pc != code_length) { // special case: end_pc == code_length
|
|
1328 |
if (end_pc > code_length || code_data[end_pc] == 0) {
|
|
1329 |
class_format_error("Illegal exception table end_pc %d", end_pc);
|
|
1330 |
return;
|
|
1331 |
}
|
|
1332 |
}
|
|
1333 |
if (handler_pc >= code_length || code_data[handler_pc] == 0) {
|
|
1334 |
class_format_error("Illegal exception table handler_pc %d", handler_pc);
|
|
1335 |
return;
|
|
1336 |
}
|
|
1337 |
int catch_type_index = exhandlers->int_at(i++);
|
|
1338 |
if (catch_type_index != 0) {
|
|
1339 |
VerificationType catch_type = cp_index_to_type(
|
|
1340 |
catch_type_index, cp, CHECK_VERIFY(this));
|
|
1341 |
VerificationType throwable =
|
|
1342 |
VerificationType::reference_type(vmSymbols::java_lang_Throwable());
|
|
1343 |
bool is_subclass = throwable.is_assignable_from(
|
|
1344 |
catch_type, current_class(), CHECK_VERIFY(this));
|
|
1345 |
if (!is_subclass) {
|
|
1346 |
// 4286534: should throw VerifyError according to recent spec change
|
|
1347 |
verify_error(
|
|
1348 |
"Catch type is not a subclass of Throwable in handler %d",
|
|
1349 |
handler_pc);
|
|
1350 |
return;
|
|
1351 |
}
|
|
1352 |
}
|
|
1353 |
if (start_pc < min) min = start_pc;
|
|
1354 |
if (end_pc > max) max = end_pc;
|
|
1355 |
}
|
|
1356 |
}
|
|
1357 |
}
|
|
1358 |
|
|
1359 |
void ClassVerifier::verify_local_variable_table(u4 code_length, char* code_data, TRAPS) {
|
|
1360 |
int localvariable_table_length = _method()->localvariable_table_length();
|
|
1361 |
if (localvariable_table_length > 0) {
|
|
1362 |
LocalVariableTableElement* table = _method()->localvariable_table_start();
|
|
1363 |
for (int i = 0; i < localvariable_table_length; i++) {
|
|
1364 |
u2 start_bci = table[i].start_bci;
|
|
1365 |
u2 length = table[i].length;
|
|
1366 |
|
|
1367 |
if (start_bci >= code_length || code_data[start_bci] == 0) {
|
|
1368 |
class_format_error(
|
|
1369 |
"Illegal local variable table start_pc %d", start_bci);
|
|
1370 |
return;
|
|
1371 |
}
|
|
1372 |
u4 end_bci = (u4)(start_bci + length);
|
|
1373 |
if (end_bci != code_length) {
|
|
1374 |
if (end_bci >= code_length || code_data[end_bci] == 0) {
|
|
1375 |
class_format_error( "Illegal local variable table length %d", length);
|
|
1376 |
return;
|
|
1377 |
}
|
|
1378 |
}
|
|
1379 |
}
|
|
1380 |
}
|
|
1381 |
}
|
|
1382 |
|
|
1383 |
u2 ClassVerifier::verify_stackmap_table(u2 stackmap_index, u2 bci,
|
|
1384 |
StackMapFrame* current_frame,
|
|
1385 |
StackMapTable* stackmap_table,
|
|
1386 |
bool no_control_flow, TRAPS) {
|
|
1387 |
if (stackmap_index < stackmap_table->get_frame_count()) {
|
|
1388 |
u2 this_offset = stackmap_table->get_offset(stackmap_index);
|
|
1389 |
if (no_control_flow && this_offset > bci) {
|
|
1390 |
verify_error(bci, "Expecting a stack map frame");
|
|
1391 |
return 0;
|
|
1392 |
}
|
|
1393 |
if (this_offset == bci) {
|
|
1394 |
// See if current stack map can be assigned to the frame in table.
|
|
1395 |
// current_frame is the stackmap frame got from the last instruction.
|
|
1396 |
// If matched, current_frame will be updated by this method.
|
|
1397 |
bool match = stackmap_table->match_stackmap(
|
|
1398 |
current_frame, this_offset, stackmap_index,
|
|
1399 |
!no_control_flow, true, CHECK_VERIFY_(this, 0));
|
|
1400 |
if (!match) {
|
|
1401 |
// report type error
|
|
1402 |
verify_error(bci, "Instruction type does not match stack map");
|
|
1403 |
return 0;
|
|
1404 |
}
|
|
1405 |
stackmap_index++;
|
|
1406 |
} else if (this_offset < bci) {
|
|
1407 |
// current_offset should have met this_offset.
|
|
1408 |
class_format_error("Bad stack map offset %d", this_offset);
|
|
1409 |
return 0;
|
|
1410 |
}
|
|
1411 |
} else if (no_control_flow) {
|
|
1412 |
verify_error(bci, "Expecting a stack map frame");
|
|
1413 |
return 0;
|
|
1414 |
}
|
|
1415 |
return stackmap_index;
|
|
1416 |
}
|
|
1417 |
|
|
1418 |
void ClassVerifier::verify_exception_handler_targets(u2 bci, bool this_uninit, StackMapFrame* current_frame,
|
|
1419 |
StackMapTable* stackmap_table, TRAPS) {
|
|
1420 |
constantPoolHandle cp (THREAD, _method->constants());
|
|
1421 |
typeArrayHandle exhandlers (THREAD, _method->exception_table());
|
|
1422 |
if (exhandlers() != NULL) {
|
|
1423 |
for(int i = 0; i < exhandlers->length();) {
|
|
1424 |
u2 start_pc = exhandlers->int_at(i++);
|
|
1425 |
u2 end_pc = exhandlers->int_at(i++);
|
|
1426 |
u2 handler_pc = exhandlers->int_at(i++);
|
|
1427 |
int catch_type_index = exhandlers->int_at(i++);
|
|
1428 |
if(bci >= start_pc && bci < end_pc) {
|
|
1429 |
u1 flags = current_frame->flags();
|
|
1430 |
if (this_uninit) { flags |= FLAG_THIS_UNINIT; }
|
|
1431 |
|
|
1432 |
ResourceMark rm(THREAD);
|
|
1433 |
StackMapFrame* new_frame = current_frame->frame_in_exception_handler(flags);
|
|
1434 |
if (catch_type_index != 0) {
|
|
1435 |
// We know that this index refers to a subclass of Throwable
|
|
1436 |
VerificationType catch_type = cp_index_to_type(
|
|
1437 |
catch_type_index, cp, CHECK_VERIFY(this));
|
|
1438 |
new_frame->push_stack(catch_type, CHECK_VERIFY(this));
|
|
1439 |
} else {
|
|
1440 |
VerificationType throwable =
|
|
1441 |
VerificationType::reference_type(vmSymbols::java_lang_Throwable());
|
|
1442 |
new_frame->push_stack(throwable, CHECK_VERIFY(this));
|
|
1443 |
}
|
|
1444 |
bool match = stackmap_table->match_stackmap(
|
|
1445 |
new_frame, handler_pc, true, false, CHECK_VERIFY(this));
|
|
1446 |
if (!match) {
|
|
1447 |
verify_error(bci,
|
|
1448 |
"Stack map does not match the one at exception handler %d",
|
|
1449 |
handler_pc);
|
|
1450 |
return;
|
|
1451 |
}
|
|
1452 |
}
|
|
1453 |
}
|
|
1454 |
}
|
|
1455 |
}
|
|
1456 |
|
|
1457 |
void ClassVerifier::verify_cp_index(constantPoolHandle cp, int index, TRAPS) {
|
|
1458 |
int nconstants = cp->length();
|
|
1459 |
if ((index <= 0) || (index >= nconstants)) {
|
|
1460 |
verify_error("Illegal constant pool index %d in class %s",
|
|
1461 |
index, instanceKlass::cast(cp->pool_holder())->external_name());
|
|
1462 |
return;
|
|
1463 |
}
|
|
1464 |
}
|
|
1465 |
|
|
1466 |
void ClassVerifier::verify_cp_type(
|
|
1467 |
int index, constantPoolHandle cp, unsigned int types, TRAPS) {
|
|
1468 |
|
|
1469 |
// In some situations, bytecode rewriting may occur while we're verifying.
|
|
1470 |
// In this case, a constant pool cache exists and some indices refer to that
|
|
1471 |
// instead. Get the original index for the tag check
|
|
1472 |
constantPoolCacheOop cache = cp->cache();
|
|
1473 |
if (cache != NULL &&
|
|
1474 |
((types == (1 << JVM_CONSTANT_InterfaceMethodref)) ||
|
|
1475 |
(types == (1 << JVM_CONSTANT_Methodref)) ||
|
|
1476 |
(types == (1 << JVM_CONSTANT_Fieldref)))) {
|
|
1477 |
int native_index = index;
|
|
1478 |
if (Bytes::is_Java_byte_ordering_different()) {
|
|
1479 |
native_index = Bytes::swap_u2(index);
|
|
1480 |
}
|
|
1481 |
assert((native_index >= 0) && (native_index < cache->length()),
|
|
1482 |
"Must be a legal index into the cp cache");
|
|
1483 |
index = cache->entry_at(native_index)->constant_pool_index();
|
|
1484 |
}
|
|
1485 |
|
|
1486 |
verify_cp_index(cp, index, CHECK_VERIFY(this));
|
|
1487 |
unsigned int tag = cp->tag_at(index).value();
|
|
1488 |
if ((types & (1 << tag)) == 0) {
|
|
1489 |
verify_error(
|
|
1490 |
"Illegal type at constant pool entry %d in class %s",
|
|
1491 |
index, instanceKlass::cast(cp->pool_holder())->external_name());
|
|
1492 |
return;
|
|
1493 |
}
|
|
1494 |
}
|
|
1495 |
|
|
1496 |
void ClassVerifier::verify_cp_class_type(
|
|
1497 |
int index, constantPoolHandle cp, TRAPS) {
|
|
1498 |
verify_cp_index(cp, index, CHECK_VERIFY(this));
|
|
1499 |
constantTag tag = cp->tag_at(index);
|
|
1500 |
if (!tag.is_klass() && !tag.is_unresolved_klass()) {
|
|
1501 |
verify_error("Illegal type at constant pool entry %d in class %s",
|
|
1502 |
index, instanceKlass::cast(cp->pool_holder())->external_name());
|
|
1503 |
return;
|
|
1504 |
}
|
|
1505 |
}
|
|
1506 |
|
|
1507 |
void ClassVerifier::format_error_message(
|
|
1508 |
const char* fmt, int offset, va_list va) {
|
|
1509 |
ResourceMark rm(_thread);
|
|
1510 |
stringStream message(_message, _message_buffer_len);
|
|
1511 |
message.vprint(fmt, va);
|
|
1512 |
if (!_method.is_null()) {
|
|
1513 |
message.print(" in method %s", _method->name_and_sig_as_C_string());
|
|
1514 |
}
|
|
1515 |
if (offset != -1) {
|
|
1516 |
message.print(" at offset %d", offset);
|
|
1517 |
}
|
|
1518 |
}
|
|
1519 |
|
|
1520 |
void ClassVerifier::verify_error(u2 offset, const char* fmt, ...) {
|
|
1521 |
_exception_type = vmSymbols::java_lang_VerifyError();
|
|
1522 |
va_list va;
|
|
1523 |
va_start(va, fmt);
|
|
1524 |
format_error_message(fmt, offset, va);
|
|
1525 |
va_end(va);
|
|
1526 |
}
|
|
1527 |
|
|
1528 |
void ClassVerifier::verify_error(const char* fmt, ...) {
|
|
1529 |
_exception_type = vmSymbols::java_lang_VerifyError();
|
|
1530 |
va_list va;
|
|
1531 |
va_start(va, fmt);
|
|
1532 |
format_error_message(fmt, -1, va);
|
|
1533 |
va_end(va);
|
|
1534 |
}
|
|
1535 |
|
|
1536 |
void ClassVerifier::class_format_error(const char* msg, ...) {
|
|
1537 |
_exception_type = vmSymbols::java_lang_ClassFormatError();
|
|
1538 |
va_list va;
|
|
1539 |
va_start(va, msg);
|
|
1540 |
format_error_message(msg, -1, va);
|
|
1541 |
va_end(va);
|
|
1542 |
}
|
|
1543 |
|
|
1544 |
klassOop ClassVerifier::load_class(symbolHandle name, TRAPS) {
|
|
1545 |
// Get current loader and protection domain first.
|
|
1546 |
oop loader = current_class()->class_loader();
|
|
1547 |
oop protection_domain = current_class()->protection_domain();
|
|
1548 |
|
|
1549 |
return SystemDictionary::resolve_or_fail(
|
|
1550 |
name, Handle(THREAD, loader), Handle(THREAD, protection_domain),
|
|
1551 |
true, CHECK_NULL);
|
|
1552 |
}
|
|
1553 |
|
|
1554 |
bool ClassVerifier::is_protected_access(instanceKlassHandle this_class,
|
|
1555 |
klassOop target_class,
|
|
1556 |
symbolOop field_name,
|
|
1557 |
symbolOop field_sig,
|
|
1558 |
bool is_method) {
|
|
1559 |
No_Safepoint_Verifier nosafepoint;
|
|
1560 |
|
|
1561 |
// If target class isn't a super class of this class, we don't worry about this case
|
|
1562 |
if (!this_class->is_subclass_of(target_class)) {
|
|
1563 |
return false;
|
|
1564 |
}
|
|
1565 |
// Check if the specified method or field is protected
|
|
1566 |
instanceKlass* target_instance = instanceKlass::cast(target_class);
|
|
1567 |
fieldDescriptor fd;
|
|
1568 |
if (is_method) {
|
|
1569 |
methodOop m = target_instance->uncached_lookup_method(field_name, field_sig);
|
|
1570 |
if (m != NULL && m->is_protected()) {
|
|
1571 |
if (!this_class->is_same_class_package(m->method_holder())) {
|
|
1572 |
return true;
|
|
1573 |
}
|
|
1574 |
}
|
|
1575 |
} else {
|
|
1576 |
klassOop member_klass = target_instance->find_field(field_name, field_sig, &fd);
|
|
1577 |
if(member_klass != NULL && fd.is_protected()) {
|
|
1578 |
if (!this_class->is_same_class_package(member_klass)) {
|
|
1579 |
return true;
|
|
1580 |
}
|
|
1581 |
}
|
|
1582 |
}
|
|
1583 |
return false;
|
|
1584 |
}
|
|
1585 |
|
|
1586 |
void ClassVerifier::verify_ldc(
|
|
1587 |
int opcode, u2 index, StackMapFrame *current_frame,
|
|
1588 |
constantPoolHandle cp, u2 bci, TRAPS) {
|
|
1589 |
verify_cp_index(cp, index, CHECK_VERIFY(this));
|
|
1590 |
constantTag tag = cp->tag_at(index);
|
|
1591 |
unsigned int types;
|
|
1592 |
if (opcode == Bytecodes::_ldc || opcode == Bytecodes::_ldc_w) {
|
|
1593 |
if (!tag.is_unresolved_string() && !tag.is_unresolved_klass()) {
|
|
1594 |
types = (1 << JVM_CONSTANT_Integer) | (1 << JVM_CONSTANT_Float)
|
|
1595 |
| (1 << JVM_CONSTANT_String) | (1 << JVM_CONSTANT_Class);
|
|
1596 |
verify_cp_type(index, cp, types, CHECK_VERIFY(this));
|
|
1597 |
}
|
|
1598 |
} else {
|
|
1599 |
assert(opcode == Bytecodes::_ldc2_w, "must be ldc2_w");
|
|
1600 |
types = (1 << JVM_CONSTANT_Double) | (1 << JVM_CONSTANT_Long);
|
|
1601 |
verify_cp_type(index, cp, types, CHECK_VERIFY(this));
|
|
1602 |
}
|
|
1603 |
if (tag.is_string() || tag.is_unresolved_string()) {
|
|
1604 |
current_frame->push_stack(
|
|
1605 |
VerificationType::reference_type(
|
|
1606 |
vmSymbols::java_lang_String()), CHECK_VERIFY(this));
|
|
1607 |
} else if (tag.is_klass() || tag.is_unresolved_klass()) {
|
|
1608 |
current_frame->push_stack(
|
|
1609 |
VerificationType::reference_type(
|
|
1610 |
vmSymbols::java_lang_Class()), CHECK_VERIFY(this));
|
|
1611 |
} else if (tag.is_int()) {
|
|
1612 |
current_frame->push_stack(
|
|
1613 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1614 |
} else if (tag.is_float()) {
|
|
1615 |
current_frame->push_stack(
|
|
1616 |
VerificationType::float_type(), CHECK_VERIFY(this));
|
|
1617 |
} else if (tag.is_double()) {
|
|
1618 |
current_frame->push_stack_2(
|
|
1619 |
VerificationType::double_type(),
|
|
1620 |
VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
1621 |
} else if (tag.is_long()) {
|
|
1622 |
current_frame->push_stack_2(
|
|
1623 |
VerificationType::long_type(),
|
|
1624 |
VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
1625 |
} else {
|
|
1626 |
verify_error(bci, "Invalid index in ldc");
|
|
1627 |
return;
|
|
1628 |
}
|
|
1629 |
}
|
|
1630 |
|
|
1631 |
void ClassVerifier::verify_switch(
|
|
1632 |
RawBytecodeStream* bcs, u4 code_length, char* code_data,
|
|
1633 |
StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS) {
|
|
1634 |
int bci = bcs->bci();
|
|
1635 |
address bcp = bcs->bcp();
|
|
1636 |
address aligned_bcp = (address) round_to((intptr_t)(bcp + 1), jintSize);
|
|
1637 |
|
|
1638 |
// 4639449 & 4647081: padding bytes must be 0
|
|
1639 |
u2 padding_offset = 1;
|
|
1640 |
while ((bcp + padding_offset) < aligned_bcp) {
|
|
1641 |
if(*(bcp + padding_offset) != 0) {
|
|
1642 |
verify_error(bci, "Nonzero padding byte in lookswitch or tableswitch");
|
|
1643 |
return;
|
|
1644 |
}
|
|
1645 |
padding_offset++;
|
|
1646 |
}
|
|
1647 |
int default_offset = (int) Bytes::get_Java_u4(aligned_bcp);
|
|
1648 |
int keys, delta;
|
|
1649 |
current_frame->pop_stack(
|
|
1650 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1651 |
if (bcs->code() == Bytecodes::_tableswitch) {
|
|
1652 |
jint low = (jint)Bytes::get_Java_u4(aligned_bcp + jintSize);
|
|
1653 |
jint high = (jint)Bytes::get_Java_u4(aligned_bcp + 2*jintSize);
|
|
1654 |
if (low > high) {
|
|
1655 |
verify_error(bci,
|
|
1656 |
"low must be less than or equal to high in tableswitch");
|
|
1657 |
return;
|
|
1658 |
}
|
|
1659 |
keys = high - low + 1;
|
|
1660 |
if (keys < 0) {
|
|
1661 |
verify_error(bci, "too many keys in tableswitch");
|
|
1662 |
return;
|
|
1663 |
}
|
|
1664 |
delta = 1;
|
|
1665 |
} else {
|
|
1666 |
keys = (int)Bytes::get_Java_u4(aligned_bcp + jintSize);
|
|
1667 |
if (keys < 0) {
|
|
1668 |
verify_error(bci, "number of keys in lookupswitch less than 0");
|
|
1669 |
return;
|
|
1670 |
}
|
|
1671 |
delta = 2;
|
|
1672 |
// Make sure that the lookupswitch items are sorted
|
|
1673 |
for (int i = 0; i < (keys - 1); i++) {
|
|
1674 |
jint this_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i)*jintSize);
|
|
1675 |
jint next_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i+2)*jintSize);
|
|
1676 |
if (this_key >= next_key) {
|
|
1677 |
verify_error(bci, "Bad lookupswitch instruction");
|
|
1678 |
return;
|
|
1679 |
}
|
|
1680 |
}
|
|
1681 |
}
|
|
1682 |
int target = bci + default_offset;
|
|
1683 |
stackmap_table->check_jump_target(current_frame, target, CHECK_VERIFY(this));
|
|
1684 |
for (int i = 0; i < keys; i++) {
|
|
1685 |
target = bci + (jint)Bytes::get_Java_u4(aligned_bcp+(3+i*delta)*jintSize);
|
|
1686 |
stackmap_table->check_jump_target(
|
|
1687 |
current_frame, target, CHECK_VERIFY(this));
|
|
1688 |
}
|
|
1689 |
}
|
|
1690 |
|
|
1691 |
bool ClassVerifier::name_in_supers(
|
|
1692 |
symbolOop ref_name, instanceKlassHandle current) {
|
|
1693 |
klassOop super = current->super();
|
|
1694 |
while (super != NULL) {
|
|
1695 |
if (super->klass_part()->name() == ref_name) {
|
|
1696 |
return true;
|
|
1697 |
}
|
|
1698 |
super = super->klass_part()->super();
|
|
1699 |
}
|
|
1700 |
return false;
|
|
1701 |
}
|
|
1702 |
|
|
1703 |
void ClassVerifier::verify_field_instructions(RawBytecodeStream* bcs,
|
|
1704 |
StackMapFrame* current_frame,
|
|
1705 |
constantPoolHandle cp,
|
|
1706 |
TRAPS) {
|
|
1707 |
u2 index = bcs->get_index_big();
|
|
1708 |
verify_cp_type(index, cp, 1 << JVM_CONSTANT_Fieldref, CHECK_VERIFY(this));
|
|
1709 |
|
|
1710 |
// Get field name and signature
|
|
1711 |
symbolHandle field_name = symbolHandle(THREAD, cp->name_ref_at(index));
|
|
1712 |
symbolHandle field_sig = symbolHandle(THREAD, cp->signature_ref_at(index));
|
|
1713 |
|
|
1714 |
if (!SignatureVerifier::is_valid_type_signature(field_sig)) {
|
|
1715 |
class_format_error(
|
|
1716 |
"Invalid signature for field in class %s referenced "
|
|
1717 |
"from constant pool index %d", _klass->external_name(), index);
|
|
1718 |
return;
|
|
1719 |
}
|
|
1720 |
|
|
1721 |
// Get referenced class type
|
|
1722 |
VerificationType ref_class_type = cp_ref_index_to_type(
|
|
1723 |
index, cp, CHECK_VERIFY(this));
|
|
1724 |
if (!ref_class_type.is_object()) {
|
|
1725 |
verify_error(
|
|
1726 |
"Expecting reference to class in class %s at constant pool index %d",
|
|
1727 |
_klass->external_name(), index);
|
|
1728 |
return;
|
|
1729 |
}
|
|
1730 |
VerificationType target_class_type = ref_class_type;
|
|
1731 |
|
|
1732 |
assert(sizeof(VerificationType) == sizeof(uintptr_t),
|
|
1733 |
"buffer type must match VerificationType size");
|
|
1734 |
uintptr_t field_type_buffer[2];
|
|
1735 |
VerificationType* field_type = (VerificationType*)field_type_buffer;
|
|
1736 |
// If we make a VerificationType[2] array directly, the compiler calls
|
|
1737 |
// to the c-runtime library to do the allocation instead of just
|
|
1738 |
// stack allocating it. Plus it would run constructors. This shows up
|
|
1739 |
// in performance profiles.
|
|
1740 |
|
|
1741 |
SignatureStream sig_stream(field_sig, false);
|
|
1742 |
VerificationType stack_object_type;
|
|
1743 |
int n = change_sig_to_verificationType(
|
|
1744 |
&sig_stream, field_type, CHECK_VERIFY(this));
|
|
1745 |
u2 bci = bcs->bci();
|
|
1746 |
bool is_assignable;
|
|
1747 |
switch (bcs->code()) {
|
|
1748 |
case Bytecodes::_getstatic: {
|
|
1749 |
for (int i = 0; i < n; i++) {
|
|
1750 |
current_frame->push_stack(field_type[i], CHECK_VERIFY(this));
|
|
1751 |
}
|
|
1752 |
break;
|
|
1753 |
}
|
|
1754 |
case Bytecodes::_putstatic: {
|
|
1755 |
for (int i = n - 1; i >= 0; i--) {
|
|
1756 |
current_frame->pop_stack(field_type[i], CHECK_VERIFY(this));
|
|
1757 |
}
|
|
1758 |
break;
|
|
1759 |
}
|
|
1760 |
case Bytecodes::_getfield: {
|
|
1761 |
stack_object_type = current_frame->pop_stack(
|
|
1762 |
target_class_type, CHECK_VERIFY(this));
|
|
1763 |
for (int i = 0; i < n; i++) {
|
|
1764 |
current_frame->push_stack(field_type[i], CHECK_VERIFY(this));
|
|
1765 |
}
|
|
1766 |
goto check_protected;
|
|
1767 |
}
|
|
1768 |
case Bytecodes::_putfield: {
|
|
1769 |
for (int i = n - 1; i >= 0; i--) {
|
|
1770 |
current_frame->pop_stack(field_type[i], CHECK_VERIFY(this));
|
|
1771 |
}
|
|
1772 |
stack_object_type = current_frame->pop_stack(CHECK_VERIFY(this));
|
|
1773 |
|
|
1774 |
// The JVMS 2nd edition allows field initialization before the superclass
|
|
1775 |
// initializer, if the field is defined within the current class.
|
|
1776 |
fieldDescriptor fd;
|
|
1777 |
if (stack_object_type == VerificationType::uninitialized_this_type() &&
|
|
1778 |
target_class_type.equals(current_type()) &&
|
|
1779 |
_klass->find_local_field(field_name(), field_sig(), &fd)) {
|
|
1780 |
stack_object_type = current_type();
|
|
1781 |
}
|
|
1782 |
is_assignable = target_class_type.is_assignable_from(
|
|
1783 |
stack_object_type, current_class(), CHECK_VERIFY(this));
|
|
1784 |
if (!is_assignable) {
|
|
1785 |
verify_error(bci, "Bad type on operand stack in putfield");
|
|
1786 |
return;
|
|
1787 |
}
|
|
1788 |
}
|
|
1789 |
check_protected: {
|
|
1790 |
if (_this_type == stack_object_type)
|
|
1791 |
break; // stack_object_type must be assignable to _current_class_type
|
|
1792 |
symbolHandle ref_class_name = symbolHandle(THREAD,
|
|
1793 |
cp->klass_name_at(cp->klass_ref_index_at(index)));
|
|
1794 |
if (!name_in_supers(ref_class_name(), current_class()))
|
|
1795 |
// stack_object_type must be assignable to _current_class_type since:
|
|
1796 |
// 1. stack_object_type must be assignable to ref_class.
|
|
1797 |
// 2. ref_class must be _current_class or a subclass of it. It can't
|
|
1798 |
// be a superclass of it. See revised JVMS 5.4.4.
|
|
1799 |
break;
|
|
1800 |
|
|
1801 |
klassOop ref_class_oop = load_class(ref_class_name, CHECK);
|
|
1802 |
if (is_protected_access(current_class(), ref_class_oop, field_name(),
|
|
1803 |
field_sig(), false)) {
|
|
1804 |
// It's protected access, check if stack object is assignable to
|
|
1805 |
// current class.
|
|
1806 |
is_assignable = current_type().is_assignable_from(
|
|
1807 |
stack_object_type, current_class(), CHECK_VERIFY(this));
|
|
1808 |
if (!is_assignable) {
|
|
1809 |
verify_error(bci, "Bad access to protected data in getfield");
|
|
1810 |
return;
|
|
1811 |
}
|
|
1812 |
}
|
|
1813 |
break;
|
|
1814 |
}
|
|
1815 |
default: ShouldNotReachHere();
|
|
1816 |
}
|
|
1817 |
}
|
|
1818 |
|
|
1819 |
void ClassVerifier::verify_invoke_init(
|
|
1820 |
RawBytecodeStream* bcs, VerificationType ref_class_type,
|
|
1821 |
StackMapFrame* current_frame, u4 code_length, bool *this_uninit,
|
|
1822 |
constantPoolHandle cp, TRAPS) {
|
|
1823 |
u2 bci = bcs->bci();
|
|
1824 |
VerificationType type = current_frame->pop_stack(
|
|
1825 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
1826 |
if (type == VerificationType::uninitialized_this_type()) {
|
|
1827 |
// The method must be an <init> method of either this class, or one of its
|
|
1828 |
// superclasses
|
|
1829 |
klassOop oop = current_class()();
|
|
1830 |
Klass* klass = oop->klass_part();
|
|
1831 |
while (klass != NULL && ref_class_type.name() != klass->name()) {
|
|
1832 |
klass = klass->super()->klass_part();
|
|
1833 |
}
|
|
1834 |
if (klass == NULL) {
|
|
1835 |
verify_error(bci, "Bad <init> method call");
|
|
1836 |
return;
|
|
1837 |
}
|
|
1838 |
current_frame->initialize_object(type, current_type());
|
|
1839 |
*this_uninit = true;
|
|
1840 |
} else if (type.is_uninitialized()) {
|
|
1841 |
u2 new_offset = type.bci();
|
|
1842 |
address new_bcp = bcs->bcp() - bci + new_offset;
|
|
1843 |
if (new_offset > (code_length - 3) || (*new_bcp) != Bytecodes::_new) {
|
|
1844 |
verify_error(new_offset, "Expecting new instruction");
|
|
1845 |
return;
|
|
1846 |
}
|
|
1847 |
u2 new_class_index = Bytes::get_Java_u2(new_bcp + 1);
|
|
1848 |
verify_cp_class_type(new_class_index, cp, CHECK_VERIFY(this));
|
|
1849 |
|
|
1850 |
// The method must be an <init> method of the indicated class
|
|
1851 |
VerificationType new_class_type = cp_index_to_type(
|
|
1852 |
new_class_index, cp, CHECK_VERIFY(this));
|
|
1853 |
if (!new_class_type.equals(ref_class_type)) {
|
|
1854 |
verify_error(bci, "Call to wrong <init> method");
|
|
1855 |
return;
|
|
1856 |
}
|
|
1857 |
// According to the VM spec, if the referent class is a superclass of the
|
|
1858 |
// current class, and is in a different runtime package, and the method is
|
|
1859 |
// protected, then the objectref must be the current class or a subclass
|
|
1860 |
// of the current class.
|
|
1861 |
VerificationType objectref_type = new_class_type;
|
|
1862 |
if (name_in_supers(ref_class_type.name(), current_class())) {
|
|
1863 |
klassOop ref_klass = load_class(
|
|
1864 |
ref_class_type.name(), CHECK_VERIFY(this));
|
|
1865 |
methodOop m = instanceKlass::cast(ref_klass)->uncached_lookup_method(
|
|
1866 |
vmSymbols::object_initializer_name(),
|
|
1867 |
cp->signature_ref_at(bcs->get_index_big()));
|
|
1868 |
instanceKlassHandle mh(THREAD, m->method_holder());
|
|
1869 |
if (m->is_protected() && !mh->is_same_class_package(_klass())) {
|
|
1870 |
bool assignable = current_type().is_assignable_from(
|
|
1871 |
objectref_type, current_class(), CHECK_VERIFY(this));
|
|
1872 |
if (!assignable) {
|
|
1873 |
verify_error(bci, "Bad access to protected <init> method");
|
|
1874 |
return;
|
|
1875 |
}
|
|
1876 |
}
|
|
1877 |
}
|
|
1878 |
current_frame->initialize_object(type, new_class_type);
|
|
1879 |
} else {
|
|
1880 |
verify_error(bci, "Bad operand type when invoking <init>");
|
|
1881 |
return;
|
|
1882 |
}
|
|
1883 |
}
|
|
1884 |
|
|
1885 |
void ClassVerifier::verify_invoke_instructions(
|
|
1886 |
RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame,
|
|
1887 |
bool *this_uninit, VerificationType return_type,
|
|
1888 |
constantPoolHandle cp, TRAPS) {
|
|
1889 |
// Make sure the constant pool item is the right type
|
|
1890 |
u2 index = bcs->get_index_big();
|
|
1891 |
Bytecodes::Code opcode = bcs->code();
|
|
1892 |
unsigned int types = (opcode == Bytecodes::_invokeinterface
|
|
1893 |
? 1 << JVM_CONSTANT_InterfaceMethodref
|
|
1894 |
: 1 << JVM_CONSTANT_Methodref);
|
|
1895 |
verify_cp_type(index, cp, types, CHECK_VERIFY(this));
|
|
1896 |
|
|
1897 |
// Get method name and signature
|
|
1898 |
symbolHandle method_name(THREAD, cp->name_ref_at(index));
|
|
1899 |
symbolHandle method_sig(THREAD, cp->signature_ref_at(index));
|
|
1900 |
|
|
1901 |
if (!SignatureVerifier::is_valid_method_signature(method_sig)) {
|
|
1902 |
class_format_error(
|
|
1903 |
"Invalid method signature in class %s referenced "
|
|
1904 |
"from constant pool index %d", _klass->external_name(), index);
|
|
1905 |
return;
|
|
1906 |
}
|
|
1907 |
|
|
1908 |
// Get referenced class type
|
|
1909 |
VerificationType ref_class_type = cp_ref_index_to_type(
|
|
1910 |
index, cp, CHECK_VERIFY(this));
|
|
1911 |
|
|
1912 |
// For a small signature length, we just allocate 128 bytes instead
|
|
1913 |
// of parsing the signature once to find its size.
|
|
1914 |
// -3 is for '(', ')' and return descriptor; multiply by 2 is for
|
|
1915 |
// longs/doubles to be consertive.
|
|
1916 |
assert(sizeof(VerificationType) == sizeof(uintptr_t),
|
|
1917 |
"buffer type must match VerificationType size");
|
|
1918 |
uintptr_t on_stack_sig_types_buffer[128];
|
|
1919 |
// If we make a VerificationType[128] array directly, the compiler calls
|
|
1920 |
// to the c-runtime library to do the allocation instead of just
|
|
1921 |
// stack allocating it. Plus it would run constructors. This shows up
|
|
1922 |
// in performance profiles.
|
|
1923 |
|
|
1924 |
VerificationType* sig_types;
|
|
1925 |
int size = (method_sig->utf8_length() - 3) * 2;
|
|
1926 |
if (size > 128) {
|
|
1927 |
// Long and double occupies two slots here.
|
|
1928 |
ArgumentSizeComputer size_it(method_sig);
|
|
1929 |
size = size_it.size();
|
|
1930 |
sig_types = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, VerificationType, size);
|
|
1931 |
} else{
|
|
1932 |
sig_types = (VerificationType*)on_stack_sig_types_buffer;
|
|
1933 |
}
|
|
1934 |
SignatureStream sig_stream(method_sig);
|
|
1935 |
int sig_i = 0;
|
|
1936 |
while (!sig_stream.at_return_type()) {
|
|
1937 |
sig_i += change_sig_to_verificationType(
|
|
1938 |
&sig_stream, &sig_types[sig_i], CHECK_VERIFY(this));
|
|
1939 |
sig_stream.next();
|
|
1940 |
}
|
|
1941 |
int nargs = sig_i;
|
|
1942 |
|
|
1943 |
#ifdef ASSERT
|
|
1944 |
{
|
|
1945 |
ArgumentSizeComputer size_it(method_sig);
|
|
1946 |
assert(nargs == size_it.size(), "Argument sizes do not match");
|
|
1947 |
assert(nargs <= (method_sig->utf8_length() - 3) * 2, "estimate of max size isn't conservative enough");
|
|
1948 |
}
|
|
1949 |
#endif
|
|
1950 |
|
|
1951 |
// Check instruction operands
|
|
1952 |
u2 bci = bcs->bci();
|
|
1953 |
if (opcode == Bytecodes::_invokeinterface) {
|
|
1954 |
address bcp = bcs->bcp();
|
|
1955 |
// 4905268: count operand in invokeinterface should be nargs+1, not nargs.
|
|
1956 |
// JSR202 spec: The count operand of an invokeinterface instruction is valid if it is
|
|
1957 |
// the difference between the size of the operand stack before and after the instruction
|
|
1958 |
// executes.
|
|
1959 |
if (*(bcp+3) != (nargs+1)) {
|
|
1960 |
verify_error(bci, "Inconsistent args count operand in invokeinterface");
|
|
1961 |
return;
|
|
1962 |
}
|
|
1963 |
if (*(bcp+4) != 0) {
|
|
1964 |
verify_error(bci, "Fourth operand byte of invokeinterface must be zero");
|
|
1965 |
return;
|
|
1966 |
}
|
|
1967 |
}
|
|
1968 |
|
|
1969 |
if (method_name->byte_at(0) == '<') {
|
|
1970 |
// Make sure <init> can only be invoked by invokespecial
|
|
1971 |
if (opcode != Bytecodes::_invokespecial ||
|
|
1972 |
method_name() != vmSymbols::object_initializer_name()) {
|
|
1973 |
verify_error(bci, "Illegal call to internal method");
|
|
1974 |
return;
|
|
1975 |
}
|
|
1976 |
} else if (opcode == Bytecodes::_invokespecial
|
|
1977 |
&& !ref_class_type.equals(current_type())
|
|
1978 |
&& !ref_class_type.equals(VerificationType::reference_type(
|
|
1979 |
current_class()->super()->klass_part()->name()))) {
|
|
1980 |
bool subtype = ref_class_type.is_assignable_from(
|
|
1981 |
current_type(), current_class(), CHECK_VERIFY(this));
|
|
1982 |
if (!subtype) {
|
|
1983 |
verify_error(bci, "Bad invokespecial instruction: "
|
|
1984 |
"current class isn't assignable to reference class.");
|
|
1985 |
return;
|
|
1986 |
}
|
|
1987 |
}
|
|
1988 |
// Match method descriptor with operand stack
|
|
1989 |
for (int i = nargs - 1; i >= 0; i--) { // Run backwards
|
|
1990 |
current_frame->pop_stack(sig_types[i], CHECK_VERIFY(this));
|
|
1991 |
}
|
|
1992 |
// Check objectref on operand stack
|
|
1993 |
if (opcode != Bytecodes::_invokestatic) {
|
|
1994 |
if (method_name() == vmSymbols::object_initializer_name()) { // <init> method
|
|
1995 |
verify_invoke_init(bcs, ref_class_type, current_frame,
|
|
1996 |
code_length, this_uninit, cp, CHECK_VERIFY(this));
|
|
1997 |
} else { // other methods
|
|
1998 |
// Ensures that target class is assignable to method class.
|
|
1999 |
if (opcode == Bytecodes::_invokespecial) {
|
|
2000 |
current_frame->pop_stack(current_type(), CHECK_VERIFY(this));
|
|
2001 |
} else if (opcode == Bytecodes::_invokevirtual) {
|
|
2002 |
VerificationType stack_object_type =
|
|
2003 |
current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this));
|
|
2004 |
if (current_type() != stack_object_type) {
|
|
2005 |
assert(cp->cache() == NULL, "not rewritten yet");
|
|
2006 |
symbolHandle ref_class_name = symbolHandle(THREAD,
|
|
2007 |
cp->klass_name_at(cp->klass_ref_index_at(index)));
|
|
2008 |
// See the comments in verify_field_instructions() for
|
|
2009 |
// the rationale behind this.
|
|
2010 |
if (name_in_supers(ref_class_name(), current_class())) {
|
|
2011 |
klassOop ref_class = load_class(ref_class_name, CHECK);
|
|
2012 |
if (is_protected_access(
|
|
2013 |
_klass, ref_class, method_name(), method_sig(), true)) {
|
|
2014 |
// It's protected access, check if stack object is
|
|
2015 |
// assignable to current class.
|
|
2016 |
bool is_assignable = current_type().is_assignable_from(
|
|
2017 |
stack_object_type, current_class(), CHECK_VERIFY(this));
|
|
2018 |
if (!is_assignable) {
|
|
2019 |
if (ref_class_type.name() == vmSymbols::java_lang_Object()
|
|
2020 |
&& stack_object_type.is_array()
|
|
2021 |
&& method_name() == vmSymbols::clone_name()) {
|
|
2022 |
// Special case: arrays pretend to implement public Object
|
|
2023 |
// clone().
|
|
2024 |
} else {
|
|
2025 |
verify_error(bci,
|
|
2026 |
"Bad access to protected data in invokevirtual");
|
|
2027 |
return;
|
|
2028 |
}
|
|
2029 |
}
|
|
2030 |
}
|
|
2031 |
}
|
|
2032 |
}
|
|
2033 |
} else {
|
|
2034 |
assert(opcode == Bytecodes::_invokeinterface, "Unexpected opcode encountered");
|
|
2035 |
current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this));
|
|
2036 |
}
|
|
2037 |
}
|
|
2038 |
}
|
|
2039 |
// Push the result type.
|
|
2040 |
if (sig_stream.type() != T_VOID) {
|
|
2041 |
if (method_name() == vmSymbols::object_initializer_name()) {
|
|
2042 |
// <init> method must have a void return type
|
|
2043 |
verify_error(bci, "Return type must be void in <init> method");
|
|
2044 |
return;
|
|
2045 |
}
|
|
2046 |
VerificationType return_type[2];
|
|
2047 |
int n = change_sig_to_verificationType(
|
|
2048 |
&sig_stream, return_type, CHECK_VERIFY(this));
|
|
2049 |
for (int i = 0; i < n; i++) {
|
|
2050 |
current_frame->push_stack(return_type[i], CHECK_VERIFY(this)); // push types backwards
|
|
2051 |
}
|
|
2052 |
}
|
|
2053 |
}
|
|
2054 |
|
|
2055 |
VerificationType ClassVerifier::get_newarray_type(
|
|
2056 |
u2 index, u2 bci, TRAPS) {
|
|
2057 |
const char* from_bt[] = {
|
|
2058 |
NULL, NULL, NULL, NULL, "[Z", "[C", "[F", "[D", "[B", "[S", "[I", "[J",
|
|
2059 |
};
|
|
2060 |
if (index < T_BOOLEAN || index > T_LONG) {
|
|
2061 |
verify_error(bci, "Illegal newarray instruction");
|
|
2062 |
return VerificationType::bogus_type();
|
|
2063 |
}
|
|
2064 |
|
|
2065 |
// from_bt[index] contains the array signature which has a length of 2
|
|
2066 |
symbolHandle sig = oopFactory::new_symbol_handle(
|
|
2067 |
from_bt[index], 2, CHECK_(VerificationType::bogus_type()));
|
|
2068 |
return VerificationType::reference_type(sig);
|
|
2069 |
}
|
|
2070 |
|
|
2071 |
void ClassVerifier::verify_anewarray(
|
|
2072 |
u2 index, constantPoolHandle cp, StackMapFrame* current_frame, TRAPS) {
|
|
2073 |
verify_cp_class_type(index, cp, CHECK_VERIFY(this));
|
|
2074 |
current_frame->pop_stack(
|
|
2075 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
2076 |
|
|
2077 |
VerificationType component_type =
|
|
2078 |
cp_index_to_type(index, cp, CHECK_VERIFY(this));
|
|
2079 |
ResourceMark rm(THREAD);
|
|
2080 |
int length;
|
|
2081 |
char* arr_sig_str;
|
|
2082 |
if (component_type.is_array()) { // it's an array
|
|
2083 |
const char* component_name = component_type.name()->as_utf8();
|
|
2084 |
// add one dimension to component
|
|
2085 |
length = (int)strlen(component_name) + 1;
|
|
2086 |
arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length);
|
|
2087 |
arr_sig_str[0] = '[';
|
|
2088 |
strncpy(&arr_sig_str[1], component_name, length - 1);
|
|
2089 |
} else { // it's an object or interface
|
|
2090 |
const char* component_name = component_type.name()->as_utf8();
|
|
2091 |
// add one dimension to component with 'L' prepended and ';' postpended.
|
|
2092 |
length = (int)strlen(component_name) + 3;
|
|
2093 |
arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length);
|
|
2094 |
arr_sig_str[0] = '[';
|
|
2095 |
arr_sig_str[1] = 'L';
|
|
2096 |
strncpy(&arr_sig_str[2], component_name, length - 2);
|
|
2097 |
arr_sig_str[length - 1] = ';';
|
|
2098 |
}
|
|
2099 |
symbolHandle arr_sig = oopFactory::new_symbol_handle(
|
|
2100 |
arr_sig_str, length, CHECK_VERIFY(this));
|
|
2101 |
VerificationType new_array_type = VerificationType::reference_type(arr_sig);
|
|
2102 |
current_frame->push_stack(new_array_type, CHECK_VERIFY(this));
|
|
2103 |
}
|
|
2104 |
|
|
2105 |
void ClassVerifier::verify_iload(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2106 |
current_frame->get_local(
|
|
2107 |
index, VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
2108 |
current_frame->push_stack(
|
|
2109 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
2110 |
}
|
|
2111 |
|
|
2112 |
void ClassVerifier::verify_lload(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2113 |
current_frame->get_local_2(
|
|
2114 |
index, VerificationType::long_type(),
|
|
2115 |
VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
2116 |
current_frame->push_stack_2(
|
|
2117 |
VerificationType::long_type(),
|
|
2118 |
VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
2119 |
}
|
|
2120 |
|
|
2121 |
void ClassVerifier::verify_fload(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2122 |
current_frame->get_local(
|
|
2123 |
index, VerificationType::float_type(), CHECK_VERIFY(this));
|
|
2124 |
current_frame->push_stack(
|
|
2125 |
VerificationType::float_type(), CHECK_VERIFY(this));
|
|
2126 |
}
|
|
2127 |
|
|
2128 |
void ClassVerifier::verify_dload(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2129 |
current_frame->get_local_2(
|
|
2130 |
index, VerificationType::double_type(),
|
|
2131 |
VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
2132 |
current_frame->push_stack_2(
|
|
2133 |
VerificationType::double_type(),
|
|
2134 |
VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
2135 |
}
|
|
2136 |
|
|
2137 |
void ClassVerifier::verify_aload(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2138 |
VerificationType type = current_frame->get_local(
|
|
2139 |
index, VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
2140 |
current_frame->push_stack(type, CHECK_VERIFY(this));
|
|
2141 |
}
|
|
2142 |
|
|
2143 |
void ClassVerifier::verify_istore(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2144 |
current_frame->pop_stack(
|
|
2145 |
VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
2146 |
current_frame->set_local(
|
|
2147 |
index, VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
2148 |
}
|
|
2149 |
|
|
2150 |
void ClassVerifier::verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2151 |
current_frame->pop_stack_2(
|
|
2152 |
VerificationType::long2_type(),
|
|
2153 |
VerificationType::long_type(), CHECK_VERIFY(this));
|
|
2154 |
current_frame->set_local_2(
|
|
2155 |
index, VerificationType::long_type(),
|
|
2156 |
VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
2157 |
}
|
|
2158 |
|
|
2159 |
void ClassVerifier::verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2160 |
current_frame->pop_stack(VerificationType::float_type(), CHECK_VERIFY(this));
|
|
2161 |
current_frame->set_local(
|
|
2162 |
index, VerificationType::float_type(), CHECK_VERIFY(this));
|
|
2163 |
}
|
|
2164 |
|
|
2165 |
void ClassVerifier::verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2166 |
current_frame->pop_stack_2(
|
|
2167 |
VerificationType::double2_type(),
|
|
2168 |
VerificationType::double_type(), CHECK_VERIFY(this));
|
|
2169 |
current_frame->set_local_2(
|
|
2170 |
index, VerificationType::double_type(),
|
|
2171 |
VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
2172 |
}
|
|
2173 |
|
|
2174 |
void ClassVerifier::verify_astore(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2175 |
VerificationType type = current_frame->pop_stack(
|
|
2176 |
VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
2177 |
current_frame->set_local(index, type, CHECK_VERIFY(this));
|
|
2178 |
}
|
|
2179 |
|
|
2180 |
void ClassVerifier::verify_iinc(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2181 |
VerificationType type = current_frame->get_local(
|
|
2182 |
index, VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
2183 |
current_frame->set_local(index, type, CHECK_VERIFY(this));
|
|
2184 |
}
|
|
2185 |
|
|
2186 |
void ClassVerifier::verify_return_value(
|
|
2187 |
VerificationType return_type, VerificationType type, u2 bci, TRAPS) {
|
|
2188 |
if (return_type == VerificationType::bogus_type()) {
|
|
2189 |
verify_error(bci, "Method expects a return value");
|
|
2190 |
return;
|
|
2191 |
}
|
|
2192 |
bool match = return_type.is_assignable_from(type, _klass, CHECK_VERIFY(this));
|
|
2193 |
if (!match) {
|
|
2194 |
verify_error(bci, "Bad return type");
|
|
2195 |
return;
|
|
2196 |
}
|
|
2197 |
}
|