529 lines
21 KiB
C++
529 lines
21 KiB
C++
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "common_throws.h"
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#include <sstream>
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#include "base/logging.h"
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#include "class_linker-inl.h"
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#include "dex_file-inl.h"
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#include "dex_instruction-inl.h"
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#include "invoke_type.h"
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#include "mirror/art_method-inl.h"
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#include "mirror/class-inl.h"
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#include "mirror/object-inl.h"
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#include "mirror/object_array-inl.h"
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#include "thread.h"
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#include "verifier/method_verifier.h"
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namespace art {
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static void AddReferrerLocation(std::ostream& os, mirror::Class* referrer)
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SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
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if (referrer != NULL) {
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std::string location(referrer->GetLocation());
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if (!location.empty()) {
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os << " (declaration of '" << PrettyDescriptor(referrer)
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<< "' appears in " << location << ")";
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}
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}
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}
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static void ThrowException(const ThrowLocation* throw_location, const char* exception_descriptor,
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mirror::Class* referrer, const char* fmt, va_list* args = NULL)
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SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
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std::ostringstream msg;
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if (args != NULL) {
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std::string vmsg;
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StringAppendV(&vmsg, fmt, *args);
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msg << vmsg;
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} else {
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msg << fmt;
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}
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AddReferrerLocation(msg, referrer);
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Thread* self = Thread::Current();
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if (throw_location == NULL) {
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ThrowLocation computed_throw_location = self->GetCurrentLocationForThrow();
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self->ThrowNewException(computed_throw_location, exception_descriptor, msg.str().c_str());
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} else {
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self->ThrowNewException(*throw_location, exception_descriptor, msg.str().c_str());
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}
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}
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static void ThrowWrappedException(const ThrowLocation* throw_location,
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const char* exception_descriptor,
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mirror::Class* referrer, const char* fmt, va_list* args = NULL)
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SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
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std::ostringstream msg;
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if (args != NULL) {
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std::string vmsg;
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StringAppendV(&vmsg, fmt, *args);
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msg << vmsg;
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} else {
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msg << fmt;
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}
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AddReferrerLocation(msg, referrer);
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Thread* self = Thread::Current();
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if (throw_location == NULL) {
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ThrowLocation computed_throw_location = self->GetCurrentLocationForThrow();
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self->ThrowNewWrappedException(computed_throw_location, exception_descriptor, msg.str().c_str());
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} else {
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self->ThrowNewWrappedException(*throw_location, exception_descriptor, msg.str().c_str());
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}
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}
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// AbstractMethodError
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void ThrowAbstractMethodError(mirror::ArtMethod* method) {
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ThrowException(NULL, "Ljava/lang/AbstractMethodError;", NULL,
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StringPrintf("abstract method \"%s\"",
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PrettyMethod(method).c_str()).c_str());
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}
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// ArithmeticException
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void ThrowArithmeticExceptionDivideByZero() {
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ThrowException(NULL, "Ljava/lang/ArithmeticException;", NULL, "divide by zero");
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}
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// ArrayIndexOutOfBoundsException
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void ThrowArrayIndexOutOfBoundsException(int index, int length) {
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ThrowException(NULL, "Ljava/lang/ArrayIndexOutOfBoundsException;", NULL,
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StringPrintf("length=%d; index=%d", length, index).c_str());
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}
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// ArrayStoreException
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void ThrowArrayStoreException(mirror::Class* element_class, mirror::Class* array_class) {
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ThrowException(NULL, "Ljava/lang/ArrayStoreException;", NULL,
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StringPrintf("%s cannot be stored in an array of type %s",
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PrettyDescriptor(element_class).c_str(),
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PrettyDescriptor(array_class).c_str()).c_str());
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}
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// ClassCastException
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void ThrowClassCastException(mirror::Class* dest_type, mirror::Class* src_type) {
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ThrowException(NULL, "Ljava/lang/ClassCastException;", NULL,
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StringPrintf("%s cannot be cast to %s",
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PrettyDescriptor(src_type).c_str(),
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PrettyDescriptor(dest_type).c_str()).c_str());
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}
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void ThrowClassCastException(const ThrowLocation* throw_location, const char* msg) {
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ThrowException(throw_location, "Ljava/lang/ClassCastException;", NULL, msg);
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}
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// ClassCircularityError
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void ThrowClassCircularityError(mirror::Class* c) {
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std::ostringstream msg;
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msg << PrettyDescriptor(c);
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ThrowException(NULL, "Ljava/lang/ClassCircularityError;", c, msg.str().c_str());
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}
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// ClassFormatError
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void ThrowClassFormatError(mirror::Class* referrer, const char* fmt, ...) {
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va_list args;
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va_start(args, fmt);
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ThrowException(NULL, "Ljava/lang/ClassFormatError;", referrer, fmt, &args);
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va_end(args);}
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// IllegalAccessError
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void ThrowIllegalAccessErrorClass(mirror::Class* referrer, mirror::Class* accessed) {
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std::ostringstream msg;
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msg << "Illegal class access: '" << PrettyDescriptor(referrer) << "' attempting to access '"
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<< PrettyDescriptor(accessed) << "'";
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ThrowException(NULL, "Ljava/lang/IllegalAccessError;", referrer, msg.str().c_str());
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}
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void ThrowIllegalAccessErrorClassForMethodDispatch(mirror::Class* referrer, mirror::Class* accessed,
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mirror::ArtMethod* called,
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InvokeType type) {
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std::ostringstream msg;
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msg << "Illegal class access ('" << PrettyDescriptor(referrer) << "' attempting to access '"
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<< PrettyDescriptor(accessed) << "') in attempt to invoke " << type
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<< " method " << PrettyMethod(called).c_str();
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ThrowException(NULL, "Ljava/lang/IllegalAccessError;", referrer, msg.str().c_str());
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}
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void ThrowIllegalAccessErrorMethod(mirror::Class* referrer, mirror::ArtMethod* accessed) {
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std::ostringstream msg;
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msg << "Method '" << PrettyMethod(accessed) << "' is inaccessible to class '"
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<< PrettyDescriptor(referrer) << "'";
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ThrowException(NULL, "Ljava/lang/IllegalAccessError;", referrer, msg.str().c_str());
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}
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void ThrowIllegalAccessErrorField(mirror::Class* referrer, mirror::ArtField* accessed) {
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std::ostringstream msg;
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msg << "Field '" << PrettyField(accessed, false) << "' is inaccessible to class '"
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<< PrettyDescriptor(referrer) << "'";
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ThrowException(NULL, "Ljava/lang/IllegalAccessError;", referrer, msg.str().c_str());
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}
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void ThrowIllegalAccessErrorFinalField(mirror::ArtMethod* referrer,
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mirror::ArtField* accessed) {
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std::ostringstream msg;
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msg << "Final field '" << PrettyField(accessed, false) << "' cannot be written to by method '"
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<< PrettyMethod(referrer) << "'";
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ThrowException(NULL, "Ljava/lang/IllegalAccessError;",
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referrer != NULL ? referrer->GetClass() : NULL,
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msg.str().c_str());
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}
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void ThrowIllegalAccessError(mirror::Class* referrer, const char* fmt, ...) {
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va_list args;
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va_start(args, fmt);
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ThrowException(NULL, "Ljava/lang/IllegalAccessError;", referrer, fmt, &args);
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va_end(args);
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}
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// IllegalAccessException
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void ThrowIllegalAccessException(const ThrowLocation* throw_location, const char* msg) {
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ThrowException(throw_location, "Ljava/lang/IllegalAccessException;", NULL, msg);
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}
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// IllegalArgumentException
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void ThrowIllegalArgumentException(const ThrowLocation* throw_location, const char* msg) {
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ThrowException(throw_location, "Ljava/lang/IllegalArgumentException;", NULL, msg);
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}
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// IncompatibleClassChangeError
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void ThrowIncompatibleClassChangeError(InvokeType expected_type, InvokeType found_type,
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mirror::ArtMethod* method,
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mirror::ArtMethod* referrer) {
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std::ostringstream msg;
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msg << "The method '" << PrettyMethod(method) << "' was expected to be of type "
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<< expected_type << " but instead was found to be of type " << found_type;
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ThrowException(NULL, "Ljava/lang/IncompatibleClassChangeError;",
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referrer != NULL ? referrer->GetClass() : NULL,
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msg.str().c_str());
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}
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void ThrowIncompatibleClassChangeErrorClassForInterfaceDispatch(mirror::ArtMethod* interface_method,
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mirror::Object* this_object,
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mirror::ArtMethod* referrer) {
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// Referrer is calling interface_method on this_object, however, the interface_method isn't
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// implemented by this_object.
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CHECK(this_object != NULL);
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std::ostringstream msg;
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msg << "Class '" << PrettyDescriptor(this_object->GetClass())
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<< "' does not implement interface '"
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<< PrettyDescriptor(interface_method->GetDeclaringClass())
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<< "' in call to '" << PrettyMethod(interface_method) << "'";
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ThrowException(NULL, "Ljava/lang/IncompatibleClassChangeError;",
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referrer != NULL ? referrer->GetClass() : NULL,
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msg.str().c_str());
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}
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void ThrowIncompatibleClassChangeErrorField(mirror::ArtField* resolved_field, bool is_static,
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mirror::ArtMethod* referrer) {
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std::ostringstream msg;
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msg << "Expected '" << PrettyField(resolved_field) << "' to be a "
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<< (is_static ? "static" : "instance") << " field" << " rather than a "
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<< (is_static ? "instance" : "static") << " field";
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ThrowException(NULL, "Ljava/lang/IncompatibleClassChangeError;", referrer->GetClass(),
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msg.str().c_str());
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}
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void ThrowIncompatibleClassChangeError(mirror::Class* referrer, const char* fmt, ...) {
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va_list args;
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va_start(args, fmt);
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ThrowException(NULL, "Ljava/lang/IncompatibleClassChangeError;", referrer, fmt, &args);
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va_end(args);
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}
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// IOException
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void ThrowIOException(const char* fmt, ...) {
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va_list args;
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va_start(args, fmt);
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ThrowException(NULL, "Ljava/io/IOException;", NULL, fmt, &args);
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va_end(args);
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}
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void ThrowWrappedIOException(const char* fmt, ...) {
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va_list args;
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va_start(args, fmt);
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ThrowWrappedException(NULL, "Ljava/io/IOException;", NULL, fmt, &args);
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va_end(args);
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}
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// LinkageError
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void ThrowLinkageError(mirror::Class* referrer, const char* fmt, ...) {
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va_list args;
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va_start(args, fmt);
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ThrowException(NULL, "Ljava/lang/LinkageError;", referrer, fmt, &args);
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va_end(args);
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}
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// NegativeArraySizeException
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void ThrowNegativeArraySizeException(int size) {
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ThrowException(NULL, "Ljava/lang/NegativeArraySizeException;", NULL,
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StringPrintf("%d", size).c_str());
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}
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void ThrowNegativeArraySizeException(const char* msg) {
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ThrowException(NULL, "Ljava/lang/NegativeArraySizeException;", NULL, msg);
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}
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// NoSuchFieldError
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void ThrowNoSuchFieldError(const StringPiece& scope, mirror::Class* c,
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const StringPiece& type, const StringPiece& name)
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SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
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std::ostringstream msg;
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std::string temp;
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msg << "No " << scope << "field " << name << " of type " << type
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<< " in class " << c->GetDescriptor(&temp) << " or its superclasses";
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ThrowException(NULL, "Ljava/lang/NoSuchFieldError;", c, msg.str().c_str());
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}
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// NoSuchMethodError
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void ThrowNoSuchMethodError(InvokeType type, mirror::Class* c, const StringPiece& name,
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const Signature& signature) {
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std::ostringstream msg;
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std::string temp;
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msg << "No " << type << " method " << name << signature
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<< " in class " << c->GetDescriptor(&temp) << " or its super classes";
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ThrowException(NULL, "Ljava/lang/NoSuchMethodError;", c, msg.str().c_str());
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}
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void ThrowNoSuchMethodError(uint32_t method_idx) {
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Thread* self = Thread::Current();
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ThrowLocation throw_location = self->GetCurrentLocationForThrow();
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mirror::DexCache* dex_cache = throw_location.GetMethod()->GetDeclaringClass()->GetDexCache();
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const DexFile& dex_file = *dex_cache->GetDexFile();
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std::ostringstream msg;
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msg << "No method '" << PrettyMethod(method_idx, dex_file, true) << "'";
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ThrowException(&throw_location, "Ljava/lang/NoSuchMethodError;",
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throw_location.GetMethod()->GetDeclaringClass(), msg.str().c_str());
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}
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// NullPointerException
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void ThrowNullPointerExceptionForFieldAccess(const ThrowLocation& throw_location,
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mirror::ArtField* field, bool is_read) {
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std::ostringstream msg;
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msg << "Attempt to " << (is_read ? "read from" : "write to")
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<< " field '" << PrettyField(field, true) << "' on a null object reference";
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ThrowException(&throw_location, "Ljava/lang/NullPointerException;", NULL, msg.str().c_str());
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}
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static void ThrowNullPointerExceptionForMethodAccessImpl(const ThrowLocation& throw_location,
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uint32_t method_idx,
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const DexFile& dex_file,
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InvokeType type)
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SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
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std::ostringstream msg;
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msg << "Attempt to invoke " << type << " method '"
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<< PrettyMethod(method_idx, dex_file, true) << "' on a null object reference";
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ThrowException(&throw_location, "Ljava/lang/NullPointerException;", NULL, msg.str().c_str());
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}
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void ThrowNullPointerExceptionForMethodAccess(const ThrowLocation& throw_location,
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uint32_t method_idx,
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InvokeType type) {
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mirror::DexCache* dex_cache = throw_location.GetMethod()->GetDeclaringClass()->GetDexCache();
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const DexFile& dex_file = *dex_cache->GetDexFile();
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ThrowNullPointerExceptionForMethodAccessImpl(throw_location, method_idx,
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dex_file, type);
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}
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void ThrowNullPointerExceptionForMethodAccess(const ThrowLocation& throw_location,
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mirror::ArtMethod* method,
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InvokeType type) {
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mirror::DexCache* dex_cache = method->GetDeclaringClass()->GetDexCache();
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const DexFile& dex_file = *dex_cache->GetDexFile();
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ThrowNullPointerExceptionForMethodAccessImpl(throw_location, method->GetDexMethodIndex(),
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dex_file, type);
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}
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void ThrowNullPointerExceptionFromDexPC(const ThrowLocation& throw_location) {
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const DexFile::CodeItem* code = throw_location.GetMethod()->GetCodeItem();
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uint32_t throw_dex_pc = throw_location.GetDexPc();
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CHECK_LT(throw_dex_pc, code->insns_size_in_code_units_);
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const Instruction* instr = Instruction::At(&code->insns_[throw_dex_pc]);
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switch (instr->Opcode()) {
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case Instruction::INVOKE_DIRECT:
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ThrowNullPointerExceptionForMethodAccess(throw_location, instr->VRegB_35c(), kDirect);
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break;
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case Instruction::INVOKE_DIRECT_RANGE:
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ThrowNullPointerExceptionForMethodAccess(throw_location, instr->VRegB_3rc(), kDirect);
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break;
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case Instruction::INVOKE_VIRTUAL:
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ThrowNullPointerExceptionForMethodAccess(throw_location, instr->VRegB_35c(), kVirtual);
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break;
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case Instruction::INVOKE_VIRTUAL_RANGE:
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ThrowNullPointerExceptionForMethodAccess(throw_location, instr->VRegB_3rc(), kVirtual);
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break;
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case Instruction::INVOKE_INTERFACE:
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ThrowNullPointerExceptionForMethodAccess(throw_location, instr->VRegB_35c(), kInterface);
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break;
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case Instruction::INVOKE_INTERFACE_RANGE:
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ThrowNullPointerExceptionForMethodAccess(throw_location, instr->VRegB_3rc(), kInterface);
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break;
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case Instruction::INVOKE_VIRTUAL_QUICK:
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case Instruction::INVOKE_VIRTUAL_RANGE_QUICK: {
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// Since we replaced the method index, we ask the verifier to tell us which
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// method is invoked at this location.
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mirror::ArtMethod* method =
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verifier::MethodVerifier::FindInvokedMethodAtDexPc(throw_location.GetMethod(),
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throw_location.GetDexPc());
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if (method != NULL) {
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// NPE with precise message.
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ThrowNullPointerExceptionForMethodAccess(throw_location, method, kVirtual);
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} else {
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// NPE with imprecise message.
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ThrowNullPointerException(&throw_location,
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"Attempt to invoke a virtual method on a null object reference");
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}
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break;
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}
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case Instruction::IGET:
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case Instruction::IGET_WIDE:
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case Instruction::IGET_OBJECT:
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case Instruction::IGET_BOOLEAN:
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case Instruction::IGET_BYTE:
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case Instruction::IGET_CHAR:
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case Instruction::IGET_SHORT: {
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mirror::ArtField* field =
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Runtime::Current()->GetClassLinker()->ResolveField(instr->VRegC_22c(),
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throw_location.GetMethod(), false);
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ThrowNullPointerExceptionForFieldAccess(throw_location, field, true /* read */);
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break;
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}
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case Instruction::IGET_QUICK:
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case Instruction::IGET_WIDE_QUICK:
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case Instruction::IGET_OBJECT_QUICK: {
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// Since we replaced the field index, we ask the verifier to tell us which
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// field is accessed at this location.
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mirror::ArtField* field =
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verifier::MethodVerifier::FindAccessedFieldAtDexPc(throw_location.GetMethod(),
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throw_location.GetDexPc());
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if (field != NULL) {
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// NPE with precise message.
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ThrowNullPointerExceptionForFieldAccess(throw_location, field, true /* read */);
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} else {
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// NPE with imprecise message.
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ThrowNullPointerException(&throw_location,
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"Attempt to read from a field on a null object reference");
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}
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break;
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}
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case Instruction::IPUT:
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case Instruction::IPUT_WIDE:
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case Instruction::IPUT_OBJECT:
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case Instruction::IPUT_BOOLEAN:
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case Instruction::IPUT_BYTE:
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case Instruction::IPUT_CHAR:
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case Instruction::IPUT_SHORT: {
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mirror::ArtField* field =
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Runtime::Current()->GetClassLinker()->ResolveField(instr->VRegC_22c(),
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throw_location.GetMethod(), false);
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ThrowNullPointerExceptionForFieldAccess(throw_location, field, false /* write */);
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break;
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}
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case Instruction::IPUT_QUICK:
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case Instruction::IPUT_WIDE_QUICK:
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case Instruction::IPUT_OBJECT_QUICK: {
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// Since we replaced the field index, we ask the verifier to tell us which
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// field is accessed at this location.
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mirror::ArtField* field =
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verifier::MethodVerifier::FindAccessedFieldAtDexPc(throw_location.GetMethod(),
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throw_location.GetDexPc());
|
|
if (field != NULL) {
|
|
// NPE with precise message.
|
|
ThrowNullPointerExceptionForFieldAccess(throw_location, field, false /* write */);
|
|
} else {
|
|
// NPE with imprecise message.
|
|
ThrowNullPointerException(&throw_location,
|
|
"Attempt to write to a field on a null object reference");
|
|
}
|
|
break;
|
|
}
|
|
case Instruction::AGET:
|
|
case Instruction::AGET_WIDE:
|
|
case Instruction::AGET_OBJECT:
|
|
case Instruction::AGET_BOOLEAN:
|
|
case Instruction::AGET_BYTE:
|
|
case Instruction::AGET_CHAR:
|
|
case Instruction::AGET_SHORT:
|
|
ThrowException(&throw_location, "Ljava/lang/NullPointerException;", NULL,
|
|
"Attempt to read from null array");
|
|
break;
|
|
case Instruction::APUT:
|
|
case Instruction::APUT_WIDE:
|
|
case Instruction::APUT_OBJECT:
|
|
case Instruction::APUT_BOOLEAN:
|
|
case Instruction::APUT_BYTE:
|
|
case Instruction::APUT_CHAR:
|
|
case Instruction::APUT_SHORT:
|
|
ThrowException(&throw_location, "Ljava/lang/NullPointerException;", NULL,
|
|
"Attempt to write to null array");
|
|
break;
|
|
case Instruction::ARRAY_LENGTH:
|
|
ThrowException(&throw_location, "Ljava/lang/NullPointerException;", NULL,
|
|
"Attempt to get length of null array");
|
|
break;
|
|
default: {
|
|
// TODO: We should have covered all the cases where we expect a NPE above, this
|
|
// message/logging is so we can improve any cases we've missed in the future.
|
|
const DexFile& dex_file =
|
|
*throw_location.GetMethod()->GetDeclaringClass()->GetDexCache()->GetDexFile();
|
|
ThrowException(&throw_location, "Ljava/lang/NullPointerException;", NULL,
|
|
StringPrintf("Null pointer exception during instruction '%s'",
|
|
instr->DumpString(&dex_file).c_str()).c_str());
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void ThrowNullPointerException(const ThrowLocation* throw_location, const char* msg) {
|
|
ThrowException(throw_location, "Ljava/lang/NullPointerException;", NULL, msg);
|
|
}
|
|
|
|
// RuntimeException
|
|
|
|
void ThrowRuntimeException(const char* fmt, ...) {
|
|
va_list args;
|
|
va_start(args, fmt);
|
|
ThrowException(NULL, "Ljava/lang/RuntimeException;", NULL, fmt, &args);
|
|
va_end(args);
|
|
}
|
|
|
|
// VerifyError
|
|
|
|
void ThrowVerifyError(mirror::Class* referrer, const char* fmt, ...) {
|
|
va_list args;
|
|
va_start(args, fmt);
|
|
ThrowException(NULL, "Ljava/lang/VerifyError;", referrer, fmt, &args);
|
|
va_end(args);
|
|
}
|
|
|
|
} // namespace art
|