blob: 26ce5be1ec1c9aac792536c307ab63c1a155c042 [file] [log] [blame]
/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "common_throws.h"
#include "base/logging.h"
#include "class_linker-inl.h"
#include "dex_file-inl.h"
#include "dex_instruction-inl.h"
#include "invoke_type.h"
#include "mirror/art_method-inl.h"
#include "mirror/class-inl.h"
#include "mirror/object-inl.h"
#include "mirror/object_array-inl.h"
#include "object_utils.h"
#include "thread.h"
#include "verifier/method_verifier.h"
#include <sstream>
namespace art {
static void AddReferrerLocation(std::ostream& os, const mirror::Class* referrer)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
if (referrer != NULL) {
ClassHelper kh(referrer);
std::string location(kh.GetLocation());
if (!location.empty()) {
os << " (declaration of '" << PrettyDescriptor(referrer)
<< "' appears in " << location << ")";
}
}
}
static void ThrowException(const ThrowLocation* throw_location, const char* exception_descriptor,
const mirror::Class* referrer, const char* fmt, va_list* args = NULL)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
std::ostringstream msg;
if (args != NULL) {
std::string vmsg;
StringAppendV(&vmsg, fmt, *args);
msg << vmsg;
} else {
msg << fmt;
}
AddReferrerLocation(msg, referrer);
Thread* self = Thread::Current();
if (throw_location == NULL) {
ThrowLocation computed_throw_location = self->GetCurrentLocationForThrow();
self->ThrowNewException(computed_throw_location, exception_descriptor, msg.str().c_str());
} else {
self->ThrowNewException(*throw_location, exception_descriptor, msg.str().c_str());
}
}
// AbstractMethodError
void ThrowAbstractMethodError(const mirror::ArtMethod* method) {
ThrowException(NULL, "Ljava/lang/AbstractMethodError;", NULL,
StringPrintf("abstract method \"%s\"",
PrettyMethod(method).c_str()).c_str());
}
// ArithmeticException
void ThrowArithmeticExceptionDivideByZero() {
ThrowException(NULL, "Ljava/lang/ArithmeticException;", NULL, "divide by zero");
}
// ArrayIndexOutOfBoundsException
void ThrowArrayIndexOutOfBoundsException(int index, int length) {
ThrowException(NULL, "Ljava/lang/ArrayIndexOutOfBoundsException;", NULL,
StringPrintf("length=%d; index=%d", length, index).c_str());
}
// ArrayStoreException
void ThrowArrayStoreException(const mirror::Class* element_class,
const mirror::Class* array_class) {
ThrowException(NULL, "Ljava/lang/ArrayStoreException;", NULL,
StringPrintf("%s cannot be stored in an array of type %s",
PrettyDescriptor(element_class).c_str(),
PrettyDescriptor(array_class).c_str()).c_str());
}
// ClassCastException
void ThrowClassCastException(const mirror::Class* dest_type, const mirror::Class* src_type) {
ThrowException(NULL, "Ljava/lang/ClassCastException;", NULL,
StringPrintf("%s cannot be cast to %s",
PrettyDescriptor(src_type).c_str(),
PrettyDescriptor(dest_type).c_str()).c_str());
}
void ThrowClassCastException(const ThrowLocation* throw_location, const char* msg) {
ThrowException(throw_location, "Ljava/lang/ClassCastException;", NULL, msg);
}
// ClassCircularityError
void ThrowClassCircularityError(mirror::Class* c) {
std::ostringstream msg;
msg << PrettyDescriptor(c);
ThrowException(NULL, "Ljava/lang/ClassCircularityError;", c, msg.str().c_str());
}
// ClassFormatError
void ThrowClassFormatError(const mirror::Class* referrer, const char* fmt, ...) {
va_list args;
va_start(args, fmt);
ThrowException(NULL, "Ljava/lang/ClassFormatError;", referrer, fmt, &args);
va_end(args);}
// IllegalAccessError
void ThrowIllegalAccessErrorClass(mirror::Class* referrer, mirror::Class* accessed) {
std::ostringstream msg;
msg << "Illegal class access: '" << PrettyDescriptor(referrer) << "' attempting to access '"
<< PrettyDescriptor(accessed) << "'";
ThrowException(NULL, "Ljava/lang/IllegalAccessError;", referrer, msg.str().c_str());
}
void ThrowIllegalAccessErrorClassForMethodDispatch(mirror::Class* referrer, mirror::Class* accessed,
const mirror::ArtMethod* caller,
const mirror::ArtMethod* called,
InvokeType type) {
std::ostringstream msg;
msg << "Illegal class access ('" << PrettyDescriptor(referrer) << "' attempting to access '"
<< PrettyDescriptor(accessed) << "') in attempt to invoke " << type
<< " method " << PrettyMethod(called).c_str();
ThrowException(NULL, "Ljava/lang/IllegalAccessError;", referrer, msg.str().c_str());
}
void ThrowIllegalAccessErrorMethod(mirror::Class* referrer, mirror::ArtMethod* accessed) {
std::ostringstream msg;
msg << "Method '" << PrettyMethod(accessed) << "' is inaccessible to class '"
<< PrettyDescriptor(referrer) << "'";
ThrowException(NULL, "Ljava/lang/IllegalAccessError;", referrer, msg.str().c_str());
}
void ThrowIllegalAccessErrorField(mirror::Class* referrer, mirror::ArtField* accessed) {
std::ostringstream msg;
msg << "Field '" << PrettyField(accessed, false) << "' is inaccessible to class '"
<< PrettyDescriptor(referrer) << "'";
ThrowException(NULL, "Ljava/lang/IllegalAccessError;", referrer, msg.str().c_str());
}
void ThrowIllegalAccessErrorFinalField(const mirror::ArtMethod* referrer,
mirror::ArtField* accessed) {
std::ostringstream msg;
msg << "Final field '" << PrettyField(accessed, false) << "' cannot be written to by method '"
<< PrettyMethod(referrer) << "'";
ThrowException(NULL, "Ljava/lang/IllegalAccessError;",
referrer != NULL ? referrer->GetClass() : NULL,
msg.str().c_str());
}
void ThrowIllegalAccessError(mirror::Class* referrer, const char* fmt, ...) {
va_list args;
va_start(args, fmt);
ThrowException(NULL, "Ljava/lang/IllegalAccessError;", referrer, fmt, &args);
va_end(args);
}
// IllegalArgumentException
void ThrowIllegalArgumentException(const ThrowLocation* throw_location, const char* msg) {
ThrowException(throw_location, "Ljava/lang/IllegalArgumentException;", NULL, msg);
}
// IncompatibleClassChangeError
void ThrowIncompatibleClassChangeError(InvokeType expected_type, InvokeType found_type,
mirror::ArtMethod* method,
const mirror::ArtMethod* referrer) {
std::ostringstream msg;
msg << "The method '" << PrettyMethod(method) << "' was expected to be of type "
<< expected_type << " but instead was found to be of type " << found_type;
ThrowException(NULL, "Ljava/lang/IncompatibleClassChangeError;",
referrer != NULL ? referrer->GetClass() : NULL,
msg.str().c_str());
}
void ThrowIncompatibleClassChangeErrorClassForInterfaceDispatch(const mirror::ArtMethod* interface_method,
mirror::Object* this_object,
const mirror::ArtMethod* referrer) {
// Referrer is calling interface_method on this_object, however, the interface_method isn't
// implemented by this_object.
CHECK(this_object != NULL);
std::ostringstream msg;
msg << "Class '" << PrettyDescriptor(this_object->GetClass())
<< "' does not implement interface '"
<< PrettyDescriptor(interface_method->GetDeclaringClass())
<< "' in call to '" << PrettyMethod(interface_method) << "'";
ThrowException(NULL, "Ljava/lang/IncompatibleClassChangeError;",
referrer != NULL ? referrer->GetClass() : NULL,
msg.str().c_str());
}
void ThrowIncompatibleClassChangeErrorField(const mirror::ArtField* resolved_field, bool is_static,
const mirror::ArtMethod* referrer) {
std::ostringstream msg;
msg << "Expected '" << PrettyField(resolved_field) << "' to be a "
<< (is_static ? "static" : "instance") << " field" << " rather than a "
<< (is_static ? "instance" : "static") << " field";
ThrowException(NULL, "Ljava/lang/IncompatibleClassChangeError;", referrer->GetClass(),
msg.str().c_str());
}
void ThrowIncompatibleClassChangeError(const mirror::Class* referrer, const char* fmt, ...) {
va_list args;
va_start(args, fmt);
ThrowException(NULL, "Ljava/lang/IncompatibleClassChangeError;", referrer, fmt, &args);
va_end(args);
}
// LinkageError
void ThrowLinkageError(const mirror::Class* referrer, const char* fmt, ...) {
va_list args;
va_start(args, fmt);
ThrowException(NULL, "Ljava/lang/LinkageError;", referrer, fmt, &args);
va_end(args);
}
// NegativeArraySizeException
void ThrowNegativeArraySizeException(int size) {
ThrowException(NULL, "Ljava/lang/NegativeArraySizeException;", NULL,
StringPrintf("%d", size).c_str());
}
void ThrowNegativeArraySizeException(const char* msg) {
ThrowException(NULL, "Ljava/lang/NegativeArraySizeException;", NULL, msg);
}
// NoSuchFieldError
void ThrowNoSuchFieldError(const StringPiece& scope, mirror::Class* c,
const StringPiece& type, const StringPiece& name)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
ClassHelper kh(c);
std::ostringstream msg;
msg << "No " << scope << "field " << name << " of type " << type
<< " in class " << kh.GetDescriptor() << " or its superclasses";
ThrowException(NULL, "Ljava/lang/NoSuchFieldError;", c, msg.str().c_str());
}
// NoSuchMethodError
void ThrowNoSuchMethodError(InvokeType type, mirror::Class* c, const StringPiece& name,
const StringPiece& signature) {
std::ostringstream msg;
ClassHelper kh(c);
msg << "No " << type << " method " << name << signature
<< " in class " << kh.GetDescriptor() << " or its super classes";
ThrowException(NULL, "Ljava/lang/NoSuchMethodError;", c, msg.str().c_str());
}
void ThrowNoSuchMethodError(uint32_t method_idx) {
Thread* self = Thread::Current();
ThrowLocation throw_location = self->GetCurrentLocationForThrow();
mirror::DexCache* dex_cache = throw_location.GetMethod()->GetDeclaringClass()->GetDexCache();
const DexFile& dex_file = *dex_cache->GetDexFile();
std::ostringstream msg;
msg << "No method '" << PrettyMethod(method_idx, dex_file, true) << "'";
ThrowException(&throw_location, "Ljava/lang/NoSuchMethodError;",
throw_location.GetMethod()->GetDeclaringClass(), msg.str().c_str());
}
// NullPointerException
void ThrowNullPointerExceptionForFieldAccess(const ThrowLocation& throw_location,
mirror::ArtField* field, bool is_read) {
std::ostringstream msg;
msg << "Attempt to " << (is_read ? "read from" : "write to")
<< " field '" << PrettyField(field, true) << "' on a null object reference";
ThrowException(&throw_location, "Ljava/lang/NullPointerException;", NULL, msg.str().c_str());
}
static void ThrowNullPointerExceptionForMethodAccessImpl(const ThrowLocation& throw_location,
uint32_t method_idx,
const DexFile& dex_file,
InvokeType type)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
std::ostringstream msg;
msg << "Attempt to invoke " << type << " method '"
<< PrettyMethod(method_idx, dex_file, true) << "' on a null object reference";
ThrowException(&throw_location, "Ljava/lang/NullPointerException;", NULL, msg.str().c_str());
}
void ThrowNullPointerExceptionForMethodAccess(const ThrowLocation& throw_location,
uint32_t method_idx,
InvokeType type) {
mirror::DexCache* dex_cache = throw_location.GetMethod()->GetDeclaringClass()->GetDexCache();
const DexFile& dex_file = *dex_cache->GetDexFile();
ThrowNullPointerExceptionForMethodAccessImpl(throw_location, method_idx,
dex_file, type);
}
void ThrowNullPointerExceptionForMethodAccess(const ThrowLocation& throw_location,
mirror::ArtMethod* method,
InvokeType type) {
mirror::DexCache* dex_cache = method->GetDeclaringClass()->GetDexCache();
const DexFile& dex_file = *dex_cache->GetDexFile();
ThrowNullPointerExceptionForMethodAccessImpl(throw_location, method->GetDexMethodIndex(),
dex_file, type);
}
void ThrowNullPointerExceptionFromDexPC(const ThrowLocation& throw_location) {
const DexFile::CodeItem* code = MethodHelper(throw_location.GetMethod()).GetCodeItem();
uint32_t throw_dex_pc = throw_location.GetDexPc();
CHECK_LT(throw_dex_pc, code->insns_size_in_code_units_);
const Instruction* instr = Instruction::At(&code->insns_[throw_dex_pc]);
switch (instr->Opcode()) {
case Instruction::INVOKE_DIRECT:
ThrowNullPointerExceptionForMethodAccess(throw_location, instr->VRegB_35c(), kDirect);
break;
case Instruction::INVOKE_DIRECT_RANGE:
ThrowNullPointerExceptionForMethodAccess(throw_location, instr->VRegB_3rc(), kDirect);
break;
case Instruction::INVOKE_VIRTUAL:
ThrowNullPointerExceptionForMethodAccess(throw_location, instr->VRegB_35c(), kVirtual);
break;
case Instruction::INVOKE_VIRTUAL_RANGE:
ThrowNullPointerExceptionForMethodAccess(throw_location, instr->VRegB_3rc(), kVirtual);
break;
case Instruction::INVOKE_INTERFACE:
ThrowNullPointerExceptionForMethodAccess(throw_location, instr->VRegB_35c(), kInterface);
break;
case Instruction::INVOKE_INTERFACE_RANGE:
ThrowNullPointerExceptionForMethodAccess(throw_location, instr->VRegB_3rc(), kInterface);
break;
case Instruction::INVOKE_VIRTUAL_QUICK:
case Instruction::INVOKE_VIRTUAL_RANGE_QUICK: {
// Since we replaced the method index, we ask the verifier to tell us which
// method is invoked at this location.
mirror::ArtMethod* method =
verifier::MethodVerifier::FindInvokedMethodAtDexPc(throw_location.GetMethod(),
throw_location.GetDexPc());
if (method != NULL) {
// NPE with precise message.
ThrowNullPointerExceptionForMethodAccess(throw_location, method, kVirtual);
} else {
// NPE with imprecise message.
ThrowNullPointerException(&throw_location,
"Attempt to invoke a virtual method on a null object reference");
}
break;
}
case Instruction::IGET:
case Instruction::IGET_WIDE:
case Instruction::IGET_OBJECT:
case Instruction::IGET_BOOLEAN:
case Instruction::IGET_BYTE:
case Instruction::IGET_CHAR:
case Instruction::IGET_SHORT: {
mirror::ArtField* field =
Runtime::Current()->GetClassLinker()->ResolveField(instr->VRegC_22c(),
throw_location.GetMethod(), false);
ThrowNullPointerExceptionForFieldAccess(throw_location, field, true /* read */);
break;
}
case Instruction::IGET_QUICK:
case Instruction::IGET_WIDE_QUICK:
case Instruction::IGET_OBJECT_QUICK: {
// Since we replaced the field index, we ask the verifier to tell us which
// field is accessed at this location.
mirror::ArtField* field =
verifier::MethodVerifier::FindAccessedFieldAtDexPc(throw_location.GetMethod(),
throw_location.GetDexPc());
if (field != NULL) {
// NPE with precise message.
ThrowNullPointerExceptionForFieldAccess(throw_location, field, true /* read */);
} else {
// NPE with imprecise message.
ThrowNullPointerException(&throw_location,
"Attempt to read from a field on a null object reference");
}
break;
}
case Instruction::IPUT:
case Instruction::IPUT_WIDE:
case Instruction::IPUT_OBJECT:
case Instruction::IPUT_BOOLEAN:
case Instruction::IPUT_BYTE:
case Instruction::IPUT_CHAR:
case Instruction::IPUT_SHORT: {
mirror::ArtField* field =
Runtime::Current()->GetClassLinker()->ResolveField(instr->VRegC_22c(),
throw_location.GetMethod(), false);
ThrowNullPointerExceptionForFieldAccess(throw_location, field, false /* write */);
break;
}
case Instruction::IPUT_QUICK:
case Instruction::IPUT_WIDE_QUICK:
case Instruction::IPUT_OBJECT_QUICK: {
// Since we replaced the field index, we ask the verifier to tell us which
// field is accessed at this location.
mirror::ArtField* field =
verifier::MethodVerifier::FindAccessedFieldAtDexPc(throw_location.GetMethod(),
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(const 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