blob: e3347a88f41baedee944fc384db035ce8bb77c65 [file] [log] [blame]
/*
* Copyright (C) 2011 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 "class.h"
#include "abstract_method-inl.h"
#include "class-inl.h"
#include "class_linker.h"
#include "class_loader.h"
#include "dex_cache.h"
#include "field-inl.h"
#include "gc/card_table-inl.h"
#include "object-inl.h"
#include "object_array-inl.h"
#include "object_utils.h"
#include "runtime.h"
#include "sirt_ref.h"
#include "thread.h"
#include "throwable.h"
#include "utils.h"
#include "well_known_classes.h"
namespace art {
namespace mirror {
Class* Class::java_lang_Class_ = NULL;
void Class::SetClassClass(Class* java_lang_Class) {
CHECK(java_lang_Class_ == NULL) << java_lang_Class_ << " " << java_lang_Class;
CHECK(java_lang_Class != NULL);
java_lang_Class_ = java_lang_Class;
}
void Class::ResetClass() {
CHECK(java_lang_Class_ != NULL);
java_lang_Class_ = NULL;
}
void Class::SetStatus(Status new_status) {
CHECK(new_status > GetStatus() || new_status == kStatusError || !Runtime::Current()->IsStarted())
<< PrettyClass(this) << " " << GetStatus() << " -> " << new_status;
CHECK(sizeof(Status) == sizeof(uint32_t)) << PrettyClass(this);
if (new_status > kStatusResolved) {
CHECK_EQ(GetThinLockId(), Thread::Current()->GetThinLockId()) << PrettyClass(this);
}
if (new_status == kStatusError) {
CHECK_NE(GetStatus(), kStatusError) << PrettyClass(this);
// stash current exception
Thread* self = Thread::Current();
SirtRef<Throwable> exception(self, self->GetException());
CHECK(exception.get() != NULL);
// clear exception to call FindSystemClass
self->ClearException();
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
Class* eiie_class = class_linker->FindSystemClass("Ljava/lang/ExceptionInInitializerError;");
CHECK(!self->IsExceptionPending());
// only verification errors, not initialization problems, should set a verify error.
// this is to ensure that ThrowEarlierClassFailure will throw NoClassDefFoundError in that case.
Class* exception_class = exception->GetClass();
if (!eiie_class->IsAssignableFrom(exception_class)) {
SetVerifyErrorClass(exception_class);
}
// restore exception
self->SetException(exception.get());
}
return SetField32(OFFSET_OF_OBJECT_MEMBER(Class, status_), new_status, false);
}
DexCache* Class::GetDexCache() const {
return GetFieldObject<DexCache*>(OFFSET_OF_OBJECT_MEMBER(Class, dex_cache_), false);
}
void Class::SetDexCache(DexCache* new_dex_cache) {
SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, dex_cache_), new_dex_cache, false);
}
Object* Class::AllocObject(Thread* self) {
DCHECK(!IsArrayClass()) << PrettyClass(this);
DCHECK(IsInstantiable()) << PrettyClass(this);
// TODO: decide whether we want this check. It currently fails during bootstrap.
// DCHECK(!Runtime::Current()->IsStarted() || IsInitializing()) << PrettyClass(this);
DCHECK_GE(this->object_size_, sizeof(Object));
return Runtime::Current()->GetHeap()->AllocObject(self, this, this->object_size_);
}
void Class::SetClassSize(size_t new_class_size) {
DCHECK_GE(new_class_size, GetClassSize()) << " class=" << PrettyTypeOf(this);
SetField32(OFFSET_OF_OBJECT_MEMBER(Class, class_size_), new_class_size, false);
}
// Return the class' name. The exact format is bizarre, but it's the specified behavior for
// Class.getName: keywords for primitive types, regular "[I" form for primitive arrays (so "int"
// but "[I"), and arrays of reference types written between "L" and ";" but with dots rather than
// slashes (so "java.lang.String" but "[Ljava.lang.String;"). Madness.
String* Class::ComputeName() {
String* name = GetName();
if (name != NULL) {
return name;
}
std::string descriptor(ClassHelper(this).GetDescriptor());
if ((descriptor[0] != 'L') && (descriptor[0] != '[')) {
// The descriptor indicates that this is the class for
// a primitive type; special-case the return value.
const char* c_name = NULL;
switch (descriptor[0]) {
case 'Z': c_name = "boolean"; break;
case 'B': c_name = "byte"; break;
case 'C': c_name = "char"; break;
case 'S': c_name = "short"; break;
case 'I': c_name = "int"; break;
case 'J': c_name = "long"; break;
case 'F': c_name = "float"; break;
case 'D': c_name = "double"; break;
case 'V': c_name = "void"; break;
default:
LOG(FATAL) << "Unknown primitive type: " << PrintableChar(descriptor[0]);
}
name = String::AllocFromModifiedUtf8(Thread::Current(), c_name);
} else {
// Convert the UTF-8 name to a java.lang.String. The name must use '.' to separate package
// components.
if (descriptor.size() > 2 && descriptor[0] == 'L' && descriptor[descriptor.size() - 1] == ';') {
descriptor.erase(0, 1);
descriptor.erase(descriptor.size() - 1);
}
std::replace(descriptor.begin(), descriptor.end(), '/', '.');
name = String::AllocFromModifiedUtf8(Thread::Current(), descriptor.c_str());
}
SetName(name);
return name;
}
void Class::DumpClass(std::ostream& os, int flags) const {
if ((flags & kDumpClassFullDetail) == 0) {
os << PrettyClass(this);
if ((flags & kDumpClassClassLoader) != 0) {
os << ' ' << GetClassLoader();
}
if ((flags & kDumpClassInitialized) != 0) {
os << ' ' << GetStatus();
}
os << "\n";
return;
}
Class* super = GetSuperClass();
ClassHelper kh(this);
os << "----- " << (IsInterface() ? "interface" : "class") << " "
<< "'" << kh.GetDescriptor() << "' cl=" << GetClassLoader() << " -----\n",
os << " objectSize=" << SizeOf() << " "
<< "(" << (super != NULL ? super->SizeOf() : -1) << " from super)\n",
os << StringPrintf(" access=0x%04x.%04x\n",
GetAccessFlags() >> 16, GetAccessFlags() & kAccJavaFlagsMask);
if (super != NULL) {
os << " super='" << PrettyClass(super) << "' (cl=" << super->GetClassLoader() << ")\n";
}
if (IsArrayClass()) {
os << " componentType=" << PrettyClass(GetComponentType()) << "\n";
}
if (kh.NumDirectInterfaces() > 0) {
os << " interfaces (" << kh.NumDirectInterfaces() << "):\n";
for (size_t i = 0; i < kh.NumDirectInterfaces(); ++i) {
Class* interface = kh.GetDirectInterface(i);
const ClassLoader* cl = interface->GetClassLoader();
os << StringPrintf(" %2zd: %s (cl=%p)\n", i, PrettyClass(interface).c_str(), cl);
}
}
os << " vtable (" << NumVirtualMethods() << " entries, "
<< (super != NULL ? super->NumVirtualMethods() : 0) << " in super):\n";
for (size_t i = 0; i < NumVirtualMethods(); ++i) {
os << StringPrintf(" %2zd: %s\n", i, PrettyMethod(GetVirtualMethodDuringLinking(i)).c_str());
}
os << " direct methods (" << NumDirectMethods() << " entries):\n";
for (size_t i = 0; i < NumDirectMethods(); ++i) {
os << StringPrintf(" %2zd: %s\n", i, PrettyMethod(GetDirectMethod(i)).c_str());
}
if (NumStaticFields() > 0) {
os << " static fields (" << NumStaticFields() << " entries):\n";
if (IsResolved() || IsErroneous()) {
for (size_t i = 0; i < NumStaticFields(); ++i) {
os << StringPrintf(" %2zd: %s\n", i, PrettyField(GetStaticField(i)).c_str());
}
} else {
os << " <not yet available>";
}
}
if (NumInstanceFields() > 0) {
os << " instance fields (" << NumInstanceFields() << " entries):\n";
if (IsResolved() || IsErroneous()) {
for (size_t i = 0; i < NumInstanceFields(); ++i) {
os << StringPrintf(" %2zd: %s\n", i, PrettyField(GetInstanceField(i)).c_str());
}
} else {
os << " <not yet available>";
}
}
}
void Class::SetReferenceInstanceOffsets(uint32_t new_reference_offsets) {
if (new_reference_offsets != CLASS_WALK_SUPER) {
// Sanity check that the number of bits set in the reference offset bitmap
// agrees with the number of references
size_t count = 0;
for (Class* c = this; c != NULL; c = c->GetSuperClass()) {
count += c->NumReferenceInstanceFieldsDuringLinking();
}
CHECK_EQ((size_t)__builtin_popcount(new_reference_offsets), count);
}
SetField32(OFFSET_OF_OBJECT_MEMBER(Class, reference_instance_offsets_),
new_reference_offsets, false);
}
void Class::SetReferenceStaticOffsets(uint32_t new_reference_offsets) {
if (new_reference_offsets != CLASS_WALK_SUPER) {
// Sanity check that the number of bits set in the reference offset bitmap
// agrees with the number of references
CHECK_EQ((size_t)__builtin_popcount(new_reference_offsets),
NumReferenceStaticFieldsDuringLinking());
}
SetField32(OFFSET_OF_OBJECT_MEMBER(Class, reference_static_offsets_),
new_reference_offsets, false);
}
bool Class::IsInSamePackage(const StringPiece& descriptor1, const StringPiece& descriptor2) {
size_t i = 0;
while (descriptor1[i] != '\0' && descriptor1[i] == descriptor2[i]) {
++i;
}
if (descriptor1.find('/', i) != StringPiece::npos ||
descriptor2.find('/', i) != StringPiece::npos) {
return false;
} else {
return true;
}
}
bool Class::IsInSamePackage(const Class* that) const {
const Class* klass1 = this;
const Class* klass2 = that;
if (klass1 == klass2) {
return true;
}
// Class loaders must match.
if (klass1->GetClassLoader() != klass2->GetClassLoader()) {
return false;
}
// Arrays are in the same package when their element classes are.
while (klass1->IsArrayClass()) {
klass1 = klass1->GetComponentType();
}
while (klass2->IsArrayClass()) {
klass2 = klass2->GetComponentType();
}
// Compare the package part of the descriptor string.
ClassHelper kh(klass1);
std::string descriptor1(kh.GetDescriptor());
kh.ChangeClass(klass2);
std::string descriptor2(kh.GetDescriptor());
return IsInSamePackage(descriptor1, descriptor2);
}
bool Class::IsClassClass() const {
Class* java_lang_Class = GetClass()->GetClass();
return this == java_lang_Class;
}
bool Class::IsStringClass() const {
return this == String::GetJavaLangString();
}
bool Class::IsThrowableClass() const {
return WellKnownClasses::ToClass(WellKnownClasses::java_lang_Throwable)->IsAssignableFrom(this);
}
bool Class::IsFieldClass() const {
Class* java_lang_Class = GetClass();
Class* java_lang_reflect_Field = java_lang_Class->GetInstanceField(0)->GetClass();
return this == java_lang_reflect_Field;
}
bool Class::IsMethodClass() const {
return (this == AbstractMethod::GetMethodClass()) ||
(this == AbstractMethod::GetConstructorClass());
}
ClassLoader* Class::GetClassLoader() const {
return GetFieldObject<ClassLoader*>(OFFSET_OF_OBJECT_MEMBER(Class, class_loader_), false);
}
void Class::SetClassLoader(ClassLoader* new_class_loader) {
SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, class_loader_), new_class_loader, false);
}
AbstractMethod* Class::FindInterfaceMethod(const StringPiece& name, const StringPiece& signature) const {
// Check the current class before checking the interfaces.
AbstractMethod* method = FindDeclaredVirtualMethod(name, signature);
if (method != NULL) {
return method;
}
int32_t iftable_count = GetIfTableCount();
IfTable* iftable = GetIfTable();
for (int32_t i = 0; i < iftable_count; i++) {
method = iftable->GetInterface(i)->FindDeclaredVirtualMethod(name, signature);
if (method != NULL) {
return method;
}
}
return NULL;
}
AbstractMethod* Class::FindInterfaceMethod(const DexCache* dex_cache, uint32_t dex_method_idx) const {
// Check the current class before checking the interfaces.
AbstractMethod* method = FindDeclaredVirtualMethod(dex_cache, dex_method_idx);
if (method != NULL) {
return method;
}
int32_t iftable_count = GetIfTableCount();
IfTable* iftable = GetIfTable();
for (int32_t i = 0; i < iftable_count; i++) {
method = iftable->GetInterface(i)->FindDeclaredVirtualMethod(dex_cache, dex_method_idx);
if (method != NULL) {
return method;
}
}
return NULL;
}
AbstractMethod* Class::FindDeclaredDirectMethod(const StringPiece& name, const StringPiece& signature) const {
MethodHelper mh;
for (size_t i = 0; i < NumDirectMethods(); ++i) {
AbstractMethod* method = GetDirectMethod(i);
mh.ChangeMethod(method);
if (name == mh.GetName() && signature == mh.GetSignature()) {
return method;
}
}
return NULL;
}
AbstractMethod* Class::FindDeclaredDirectMethod(const DexCache* dex_cache, uint32_t dex_method_idx) const {
if (GetDexCache() == dex_cache) {
for (size_t i = 0; i < NumDirectMethods(); ++i) {
AbstractMethod* method = GetDirectMethod(i);
if (method->GetDexMethodIndex() == dex_method_idx) {
return method;
}
}
}
return NULL;
}
AbstractMethod* Class::FindDirectMethod(const StringPiece& name, const StringPiece& signature) const {
for (const Class* klass = this; klass != NULL; klass = klass->GetSuperClass()) {
AbstractMethod* method = klass->FindDeclaredDirectMethod(name, signature);
if (method != NULL) {
return method;
}
}
return NULL;
}
AbstractMethod* Class::FindDirectMethod(const DexCache* dex_cache, uint32_t dex_method_idx) const {
for (const Class* klass = this; klass != NULL; klass = klass->GetSuperClass()) {
AbstractMethod* method = klass->FindDeclaredDirectMethod(dex_cache, dex_method_idx);
if (method != NULL) {
return method;
}
}
return NULL;
}
AbstractMethod* Class::FindDeclaredVirtualMethod(const StringPiece& name,
const StringPiece& signature) const {
MethodHelper mh;
for (size_t i = 0; i < NumVirtualMethods(); ++i) {
AbstractMethod* method = GetVirtualMethod(i);
mh.ChangeMethod(method);
if (name == mh.GetName() && signature == mh.GetSignature()) {
return method;
}
}
return NULL;
}
AbstractMethod* Class::FindDeclaredVirtualMethod(const DexCache* dex_cache, uint32_t dex_method_idx) const {
if (GetDexCache() == dex_cache) {
for (size_t i = 0; i < NumVirtualMethods(); ++i) {
AbstractMethod* method = GetVirtualMethod(i);
if (method->GetDexMethodIndex() == dex_method_idx) {
return method;
}
}
}
return NULL;
}
AbstractMethod* Class::FindVirtualMethod(const StringPiece& name, const StringPiece& signature) const {
for (const Class* klass = this; klass != NULL; klass = klass->GetSuperClass()) {
AbstractMethod* method = klass->FindDeclaredVirtualMethod(name, signature);
if (method != NULL) {
return method;
}
}
return NULL;
}
AbstractMethod* Class::FindVirtualMethod(const DexCache* dex_cache, uint32_t dex_method_idx) const {
for (const Class* klass = this; klass != NULL; klass = klass->GetSuperClass()) {
AbstractMethod* method = klass->FindDeclaredVirtualMethod(dex_cache, dex_method_idx);
if (method != NULL) {
return method;
}
}
return NULL;
}
Field* Class::FindDeclaredInstanceField(const StringPiece& name, const StringPiece& type) {
// Is the field in this class?
// Interfaces are not relevant because they can't contain instance fields.
FieldHelper fh;
for (size_t i = 0; i < NumInstanceFields(); ++i) {
Field* f = GetInstanceField(i);
fh.ChangeField(f);
if (name == fh.GetName() && type == fh.GetTypeDescriptor()) {
return f;
}
}
return NULL;
}
Field* Class::FindDeclaredInstanceField(const DexCache* dex_cache, uint32_t dex_field_idx) {
if (GetDexCache() == dex_cache) {
for (size_t i = 0; i < NumInstanceFields(); ++i) {
Field* f = GetInstanceField(i);
if (f->GetDexFieldIndex() == dex_field_idx) {
return f;
}
}
}
return NULL;
}
Field* Class::FindInstanceField(const StringPiece& name, const StringPiece& type) {
// Is the field in this class, or any of its superclasses?
// Interfaces are not relevant because they can't contain instance fields.
for (Class* c = this; c != NULL; c = c->GetSuperClass()) {
Field* f = c->FindDeclaredInstanceField(name, type);
if (f != NULL) {
return f;
}
}
return NULL;
}
Field* Class::FindInstanceField(const DexCache* dex_cache, uint32_t dex_field_idx) {
// Is the field in this class, or any of its superclasses?
// Interfaces are not relevant because they can't contain instance fields.
for (Class* c = this; c != NULL; c = c->GetSuperClass()) {
Field* f = c->FindDeclaredInstanceField(dex_cache, dex_field_idx);
if (f != NULL) {
return f;
}
}
return NULL;
}
Field* Class::FindDeclaredStaticField(const StringPiece& name, const StringPiece& type) {
DCHECK(type != NULL);
FieldHelper fh;
for (size_t i = 0; i < NumStaticFields(); ++i) {
Field* f = GetStaticField(i);
fh.ChangeField(f);
if (name == fh.GetName() && type == fh.GetTypeDescriptor()) {
return f;
}
}
return NULL;
}
Field* Class::FindDeclaredStaticField(const DexCache* dex_cache, uint32_t dex_field_idx) {
if (dex_cache == GetDexCache()) {
for (size_t i = 0; i < NumStaticFields(); ++i) {
Field* f = GetStaticField(i);
if (f->GetDexFieldIndex() == dex_field_idx) {
return f;
}
}
}
return NULL;
}
Field* Class::FindStaticField(const StringPiece& name, const StringPiece& type) {
// Is the field in this class (or its interfaces), or any of its
// superclasses (or their interfaces)?
ClassHelper kh;
for (Class* k = this; k != NULL; k = k->GetSuperClass()) {
// Is the field in this class?
Field* f = k->FindDeclaredStaticField(name, type);
if (f != NULL) {
return f;
}
// Is this field in any of this class' interfaces?
kh.ChangeClass(k);
for (uint32_t i = 0; i < kh.NumDirectInterfaces(); ++i) {
Class* interface = kh.GetDirectInterface(i);
f = interface->FindStaticField(name, type);
if (f != NULL) {
return f;
}
}
}
return NULL;
}
Field* Class::FindStaticField(const DexCache* dex_cache, uint32_t dex_field_idx) {
ClassHelper kh;
for (Class* k = this; k != NULL; k = k->GetSuperClass()) {
// Is the field in this class?
Field* f = k->FindDeclaredStaticField(dex_cache, dex_field_idx);
if (f != NULL) {
return f;
}
// Is this field in any of this class' interfaces?
kh.ChangeClass(k);
for (uint32_t i = 0; i < kh.NumDirectInterfaces(); ++i) {
Class* interface = kh.GetDirectInterface(i);
f = interface->FindStaticField(dex_cache, dex_field_idx);
if (f != NULL) {
return f;
}
}
}
return NULL;
}
Field* Class::FindField(const StringPiece& name, const StringPiece& type) {
// Find a field using the JLS field resolution order
ClassHelper kh;
for (Class* k = this; k != NULL; k = k->GetSuperClass()) {
// Is the field in this class?
Field* f = k->FindDeclaredInstanceField(name, type);
if (f != NULL) {
return f;
}
f = k->FindDeclaredStaticField(name, type);
if (f != NULL) {
return f;
}
// Is this field in any of this class' interfaces?
kh.ChangeClass(k);
for (uint32_t i = 0; i < kh.NumDirectInterfaces(); ++i) {
Class* interface = kh.GetDirectInterface(i);
f = interface->FindStaticField(name, type);
if (f != NULL) {
return f;
}
}
}
return NULL;
}
} // namespace mirror
} // namespace art