Merge "Add ClassExt mirror."
diff --git a/compiler/image_writer.cc b/compiler/image_writer.cc
index 59f339a..a37bf4b 100644
--- a/compiler/image_writer.cc
+++ b/compiler/image_writer.cc
@@ -51,6 +51,7 @@
#include "lock_word.h"
#include "mirror/array-inl.h"
#include "mirror/class-inl.h"
+#include "mirror/class_ext.h"
#include "mirror/class_loader.h"
#include "mirror/dex_cache.h"
#include "mirror/dex_cache-inl.h"
@@ -757,7 +758,8 @@
if (klass->GetStatus() == mirror::Class::kStatusError) {
result = true;
} else {
- CHECK(klass->GetVerifyError() == nullptr) << klass->PrettyClass();
+ ObjPtr<mirror::ClassExt> ext(klass->GetExtData());
+ CHECK(ext.IsNull() || ext->GetVerifyError() == nullptr) << klass->PrettyClass();
}
if (!result) {
// Check interfaces since these wont be visited through VisitReferences.)
diff --git a/runtime/Android.bp b/runtime/Android.bp
index 8f961af..9157907 100644
--- a/runtime/Android.bp
+++ b/runtime/Android.bp
@@ -122,6 +122,7 @@
"memory_region.cc",
"mirror/array.cc",
"mirror/class.cc",
+ "mirror/class_ext.cc",
"mirror/dex_cache.cc",
"mirror/emulated_stack_frame.cc",
"mirror/executable.cc",
diff --git a/runtime/asm_support.h b/runtime/asm_support.h
index 1e5e127..5ef1f06 100644
--- a/runtime/asm_support.h
+++ b/runtime/asm_support.h
@@ -172,7 +172,7 @@
#define MIRROR_CLASS_COMPONENT_TYPE_OFFSET (4 + MIRROR_OBJECT_HEADER_SIZE)
ADD_TEST_EQ(MIRROR_CLASS_COMPONENT_TYPE_OFFSET,
art::mirror::Class::ComponentTypeOffset().Int32Value())
-#define MIRROR_CLASS_IF_TABLE_OFFSET (12 + MIRROR_OBJECT_HEADER_SIZE)
+#define MIRROR_CLASS_IF_TABLE_OFFSET (16 + MIRROR_OBJECT_HEADER_SIZE)
ADD_TEST_EQ(MIRROR_CLASS_IF_TABLE_OFFSET,
art::mirror::Class::IfTableOffset().Int32Value())
#define MIRROR_CLASS_ACCESS_FLAGS_OFFSET (64 + MIRROR_OBJECT_HEADER_SIZE)
diff --git a/runtime/class_linker.cc b/runtime/class_linker.cc
index d3d30d4..cab9d30 100644
--- a/runtime/class_linker.cc
+++ b/runtime/class_linker.cc
@@ -67,6 +67,7 @@
#include "linear_alloc.h"
#include "mirror/class.h"
#include "mirror/class-inl.h"
+#include "mirror/class_ext.h"
#include "mirror/class_loader.h"
#include "mirror/dex_cache.h"
#include "mirror/dex_cache-inl.h"
@@ -136,10 +137,22 @@
return exception_init_method != nullptr;
}
-// Helper for ThrowEarlierClassFailure. Throws the stored error.
-static void HandleEarlierVerifyError(Thread* self, ClassLinker* class_linker, ObjPtr<mirror::Class> c)
+static mirror::Object* GetVerifyError(ObjPtr<mirror::Class> c)
REQUIRES_SHARED(Locks::mutator_lock_) {
- ObjPtr<mirror::Object> obj = c->GetVerifyError();
+ ObjPtr<mirror::ClassExt> ext(c->GetExtData());
+ if (ext == nullptr) {
+ return nullptr;
+ } else {
+ return ext->GetVerifyError();
+ }
+}
+
+// Helper for ThrowEarlierClassFailure. Throws the stored error.
+static void HandleEarlierVerifyError(Thread* self,
+ ClassLinker* class_linker,
+ ObjPtr<mirror::Class> c)
+ REQUIRES_SHARED(Locks::mutator_lock_) {
+ ObjPtr<mirror::Object> obj = GetVerifyError(c);
DCHECK(obj != nullptr);
self->AssertNoPendingException();
if (obj->IsClass()) {
@@ -173,8 +186,8 @@
Runtime* const runtime = Runtime::Current();
if (!runtime->IsAotCompiler()) { // Give info if this occurs at runtime.
std::string extra;
- if (c->GetVerifyError() != nullptr) {
- ObjPtr<mirror::Object> verify_error = c->GetVerifyError();
+ if (GetVerifyError(c) != nullptr) {
+ ObjPtr<mirror::Object> verify_error = GetVerifyError(c);
if (verify_error->IsClass()) {
extra = mirror::Class::PrettyDescriptor(verify_error->AsClass());
} else {
@@ -192,11 +205,14 @@
ObjPtr<mirror::Throwable> pre_allocated = runtime->GetPreAllocatedNoClassDefFoundError();
self->SetException(pre_allocated);
} else {
- if (c->GetVerifyError() != nullptr) {
+ if (GetVerifyError(c) != nullptr) {
// Rethrow stored error.
HandleEarlierVerifyError(self, this, c);
}
- if (c->GetVerifyError() == nullptr || wrap_in_no_class_def) {
+ // TODO This might be wrong if we hit an OOME while allocating the ClassExt. In that case we
+ // might have meant to go down the earlier if statement with the original error but it got
+ // swallowed by the OOM so we end up here.
+ if (GetVerifyError(c) == nullptr || wrap_in_no_class_def) {
// If there isn't a recorded earlier error, or this is a repeat throw from initialization,
// the top-level exception must be a NoClassDefFoundError. The potentially already pending
// exception will be a cause.
@@ -495,6 +511,14 @@
java_lang_DexCache->SetObjectSize(mirror::DexCache::InstanceSize());
mirror::Class::SetStatus(java_lang_DexCache, mirror::Class::kStatusResolved, self);
+
+ // Setup dalvik.system.ClassExt
+ Handle<mirror::Class> dalvik_system_ClassExt(hs.NewHandle(
+ AllocClass(self, java_lang_Class.Get(), mirror::ClassExt::ClassSize(image_pointer_size_))));
+ SetClassRoot(kDalvikSystemClassExt, dalvik_system_ClassExt.Get());
+ mirror::ClassExt::SetClass(dalvik_system_ClassExt.Get());
+ mirror::Class::SetStatus(dalvik_system_ClassExt, mirror::Class::kStatusResolved, self);
+
// Set up array classes for string, field, method
Handle<mirror::Class> object_array_string(hs.NewHandle(
AllocClass(self, java_lang_Class.Get(),
@@ -540,7 +564,7 @@
quick_to_interpreter_bridge_trampoline_ = GetQuickToInterpreterBridge();
}
- // Object, String and DexCache need to be rerun through FindSystemClass to finish init
+ // Object, String, ClassExt and DexCache need to be rerun through FindSystemClass to finish init
mirror::Class::SetStatus(java_lang_Object, mirror::Class::kStatusNotReady, self);
CheckSystemClass(self, java_lang_Object, "Ljava/lang/Object;");
CHECK_EQ(java_lang_Object->GetObjectSize(), mirror::Object::InstanceSize());
@@ -549,6 +573,9 @@
mirror::Class::SetStatus(java_lang_DexCache, mirror::Class::kStatusNotReady, self);
CheckSystemClass(self, java_lang_DexCache, "Ljava/lang/DexCache;");
CHECK_EQ(java_lang_DexCache->GetObjectSize(), mirror::DexCache::InstanceSize());
+ mirror::Class::SetStatus(dalvik_system_ClassExt, mirror::Class::kStatusNotReady, self);
+ CheckSystemClass(self, dalvik_system_ClassExt, "Ldalvik/system/ClassExt;");
+ CHECK_EQ(dalvik_system_ClassExt->GetObjectSize(), mirror::ClassExt::InstanceSize());
// Setup the primitive array type classes - can't be done until Object has a vtable.
SetClassRoot(kBooleanArrayClass, FindSystemClass(self, "[Z"));
@@ -1066,6 +1093,7 @@
mirror::Throwable::SetClass(GetClassRoot(kJavaLangThrowable));
mirror::StackTraceElement::SetClass(GetClassRoot(kJavaLangStackTraceElement));
mirror::EmulatedStackFrame::SetClass(GetClassRoot(kDalvikSystemEmulatedStackFrame));
+ mirror::ClassExt::SetClass(GetClassRoot(kDalvikSystemClassExt));
for (gc::space::ImageSpace* image_space : spaces) {
// Boot class loader, use a null handle.
@@ -2578,6 +2606,8 @@
klass.Assign(GetClassRoot(kJavaLangRefReference));
} else if (strcmp(descriptor, "Ljava/lang/DexCache;") == 0) {
klass.Assign(GetClassRoot(kJavaLangDexCache));
+ } else if (strcmp(descriptor, "Ldalvik/system/ClassExt;") == 0) {
+ klass.Assign(GetClassRoot(kDalvikSystemClassExt));
}
}
@@ -8087,6 +8117,7 @@
"[J",
"[S",
"[Ljava/lang/StackTraceElement;",
+ "Ldalvik/system/ClassExt;",
};
static_assert(arraysize(class_roots_descriptors) == size_t(kClassRootsMax),
"Mismatch between class descriptors and class-root enum");
diff --git a/runtime/class_linker.h b/runtime/class_linker.h
index 4426056..669249f 100644
--- a/runtime/class_linker.h
+++ b/runtime/class_linker.h
@@ -128,6 +128,7 @@
kLongArrayClass,
kShortArrayClass,
kJavaLangStackTraceElementArrayClass,
+ kDalvikSystemClassExt,
kClassRootsMax,
};
diff --git a/runtime/class_linker_test.cc b/runtime/class_linker_test.cc
index 5878bf3..7a3ebad 100644
--- a/runtime/class_linker_test.cc
+++ b/runtime/class_linker_test.cc
@@ -30,6 +30,7 @@
#include "gc/heap.h"
#include "mirror/accessible_object.h"
#include "mirror/class-inl.h"
+#include "mirror/class_ext.h"
#include "mirror/dex_cache.h"
#include "mirror/emulated_stack_frame.h"
#include "mirror/executable.h"
@@ -586,6 +587,7 @@
addOffset(OFFSETOF_MEMBER(mirror::Class, dex_cache_strings_), "dexCacheStrings");
addOffset(OFFSETOF_MEMBER(mirror::Class, dex_class_def_idx_), "dexClassDefIndex");
addOffset(OFFSETOF_MEMBER(mirror::Class, dex_type_idx_), "dexTypeIndex");
+ addOffset(OFFSETOF_MEMBER(mirror::Class, ext_data_), "extData");
addOffset(OFFSETOF_MEMBER(mirror::Class, ifields_), "iFields");
addOffset(OFFSETOF_MEMBER(mirror::Class, iftable_), "ifTable");
addOffset(OFFSETOF_MEMBER(mirror::Class, methods_), "methods");
@@ -603,12 +605,17 @@
addOffset(OFFSETOF_MEMBER(mirror::Class, sfields_), "sFields");
addOffset(OFFSETOF_MEMBER(mirror::Class, status_), "status");
addOffset(OFFSETOF_MEMBER(mirror::Class, super_class_), "superClass");
- addOffset(OFFSETOF_MEMBER(mirror::Class, verify_error_), "verifyError");
addOffset(OFFSETOF_MEMBER(mirror::Class, virtual_methods_offset_), "virtualMethodsOffset");
addOffset(OFFSETOF_MEMBER(mirror::Class, vtable_), "vtable");
};
};
+struct ClassExtOffsets : public CheckOffsets<mirror::ClassExt> {
+ ClassExtOffsets() : CheckOffsets<mirror::ClassExt>(false, "Ldalvik/system/ClassExt;") {
+ addOffset(OFFSETOF_MEMBER(mirror::ClassExt, verify_error_), "verifyError");
+ }
+};
+
struct StringOffsets : public CheckOffsets<mirror::String> {
StringOffsets() : CheckOffsets<mirror::String>(false, "Ljava/lang/String;") {
addOffset(OFFSETOF_MEMBER(mirror::String, count_), "count");
@@ -757,6 +764,7 @@
ScopedObjectAccess soa(Thread::Current());
EXPECT_TRUE(ObjectOffsets().Check());
EXPECT_TRUE(ClassOffsets().Check());
+ EXPECT_TRUE(ClassExtOffsets().Check());
EXPECT_TRUE(StringOffsets().Check());
EXPECT_TRUE(ThrowableOffsets().Check());
EXPECT_TRUE(StackTraceElementOffsets().Check());
diff --git a/runtime/mirror/class.cc b/runtime/mirror/class.cc
index 6a357b3..03d6487 100644
--- a/runtime/mirror/class.cc
+++ b/runtime/mirror/class.cc
@@ -18,6 +18,7 @@
#include "art_field-inl.h"
#include "art_method-inl.h"
+#include "class_ext.h"
#include "class_linker-inl.h"
#include "class_loader.h"
#include "class-inl.h"
@@ -29,6 +30,7 @@
#include "method.h"
#include "object_array-inl.h"
#include "object-inl.h"
+#include "object_lock.h"
#include "runtime.h"
#include "thread.h"
#include "throwable.h"
@@ -58,12 +60,23 @@
java_lang_Class_.VisitRootIfNonNull(visitor, RootInfo(kRootStickyClass));
}
-inline void Class::SetVerifyError(ObjPtr<Object> error) {
- CHECK(error != nullptr) << PrettyClass();
+ClassExt* Class::GetExtData() {
+ return GetFieldObject<ClassExt>(OFFSET_OF_OBJECT_MEMBER(Class, ext_data_));
+}
+
+void Class::SetExtData(ObjPtr<ClassExt> ext) {
+ CHECK(ext != nullptr) << PrettyClass();
+ // TODO It might be wise to just create an internal (global?) mutex that we synchronize on instead
+ // to prevent any possibility of deadlocks with java code. Alternatively we might want to come up
+ // with some other abstraction.
+ DCHECK_EQ(GetLockOwnerThreadId(), Thread::Current()->GetThreadId())
+ << "The " << PrettyClass() << " object should be locked when writing to the extData field.";
+ DCHECK(GetExtData() == nullptr)
+ << "The extData for " << PrettyClass() << " has already been set!";
if (Runtime::Current()->IsActiveTransaction()) {
- SetFieldObject<true>(OFFSET_OF_OBJECT_MEMBER(Class, verify_error_), error);
+ SetFieldObject<true>(OFFSET_OF_OBJECT_MEMBER(Class, ext_data_), ext);
} else {
- SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(Class, verify_error_), error);
+ SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(Class, ext_data_), ext);
}
}
@@ -95,9 +108,33 @@
}
}
- // Remember the current exception.
- CHECK(self->GetException() != nullptr);
- h_this->SetVerifyError(self->GetException());
+ {
+ // Ensure we lock around 'this' when we set the ClassExt.
+ ObjectLock<mirror::Class> lock(self, h_this);
+ StackHandleScope<2> hs(self);
+ // Remember the current exception.
+ Handle<Throwable> exception(hs.NewHandle(self->GetException()));
+ CHECK(exception.Get() != nullptr);
+ MutableHandle<ClassExt> ext(hs.NewHandle(h_this->GetExtData()));
+ if (ext.Get() == nullptr) {
+ // Cannot have exception while allocating.
+ self->ClearException();
+ ext.Assign(ClassExt::Alloc(self));
+ DCHECK(ext.Get() == nullptr || ext->GetVerifyError() == nullptr);
+ if (ext.Get() != nullptr) {
+ self->AssertNoPendingException();
+ h_this->SetExtData(ext.Get());
+ self->SetException(exception.Get());
+ } else {
+ // TODO Should we restore the old exception anyway?
+ self->AssertPendingOOMException();
+ }
+ }
+ if (ext.Get() != nullptr) {
+ ext->SetVerifyError(self->GetException());
+ }
+ }
+ self->AssertPendingException();
}
static_assert(sizeof(Status) == sizeof(uint32_t), "Size of status not equal to uint32");
if (Runtime::Current()->IsActiveTransaction()) {
diff --git a/runtime/mirror/class.h b/runtime/mirror/class.h
index 57bb2ed..23c70ff 100644
--- a/runtime/mirror/class.h
+++ b/runtime/mirror/class.h
@@ -49,6 +49,7 @@
namespace mirror {
+class ClassExt;
class ClassLoader;
class Constructor;
class DexCache;
@@ -1130,10 +1131,7 @@
void SetClinitThreadId(pid_t new_clinit_thread_id) REQUIRES_SHARED(Locks::mutator_lock_);
- Object* GetVerifyError() REQUIRES_SHARED(Locks::mutator_lock_) {
- // DCHECK(IsErroneous());
- return GetFieldObject<Class>(OFFSET_OF_OBJECT_MEMBER(Class, verify_error_));
- }
+ ClassExt* GetExtData() REQUIRES_SHARED(Locks::mutator_lock_);
uint16_t GetDexClassDefIndex() REQUIRES_SHARED(Locks::mutator_lock_) {
return GetField32(OFFSET_OF_OBJECT_MEMBER(Class, dex_class_def_idx_));
@@ -1322,7 +1320,8 @@
ALWAYS_INLINE void SetMethodsPtrInternal(LengthPrefixedArray<ArtMethod>* new_methods)
REQUIRES_SHARED(Locks::mutator_lock_);
- void SetVerifyError(ObjPtr<Object> klass) REQUIRES_SHARED(Locks::mutator_lock_);
+ // Set the extData field. This should be done while the 'this' is locked to prevent races.
+ void SetExtData(ObjPtr<ClassExt> ext) REQUIRES_SHARED(Locks::mutator_lock_);
template <bool throw_on_failure, bool use_referrers_cache>
bool ResolvedFieldAccessTest(ObjPtr<Class> access_to,
@@ -1388,6 +1387,12 @@
// runtime such as arrays and primitive classes).
HeapReference<DexCache> dex_cache_;
+ // Extraneous class data that is not always needed. This field is allocated lazily and may
+ // only be set with 'this' locked. This is synchronized on 'this'.
+ // TODO(allight) We should probably synchronize it on something external or handle allocation in
+ // some other (safe) way to prevent possible deadlocks.
+ HeapReference<ClassExt> ext_data_;
+
// The interface table (iftable_) contains pairs of a interface class and an array of the
// interface methods. There is one pair per interface supported by this class. That means one
// pair for each interface we support directly, indirectly via superclass, or indirectly via a
@@ -1412,10 +1417,6 @@
// check for interfaces and return null.
HeapReference<Class> super_class_;
- // If class verify fails, we must return same error on subsequent tries. We may store either
- // the class of the error, or an actual instance of Throwable here.
- HeapReference<Object> verify_error_;
-
// Virtual method table (vtable), for use by "invoke-virtual". The vtable from the superclass is
// copied in, and virtual methods from our class either replace those from the super or are
// appended. For abstract classes, methods may be created in the vtable that aren't in
diff --git a/runtime/mirror/class_ext.cc b/runtime/mirror/class_ext.cc
new file mode 100644
index 0000000..cc208e4
--- /dev/null
+++ b/runtime/mirror/class_ext.cc
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2016 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_ext.h"
+
+#include "art_method-inl.h"
+#include "base/casts.h"
+#include "base/enums.h"
+#include "class-inl.h"
+#include "dex_file-inl.h"
+#include "gc/accounting/card_table-inl.h"
+#include "object-inl.h"
+#include "object_array.h"
+#include "object_array-inl.h"
+#include "stack_trace_element.h"
+#include "utils.h"
+#include "well_known_classes.h"
+
+namespace art {
+namespace mirror {
+
+GcRoot<Class> ClassExt::dalvik_system_ClassExt_;
+
+ClassExt* ClassExt::Alloc(Thread* self) {
+ DCHECK(dalvik_system_ClassExt_.Read() != nullptr);
+ return down_cast<ClassExt*>(dalvik_system_ClassExt_.Read()->AllocObject(self).Ptr());
+}
+
+void ClassExt::SetVerifyError(ObjPtr<Object> err) {
+ if (Runtime::Current()->IsActiveTransaction()) {
+ SetFieldObject<true>(OFFSET_OF_OBJECT_MEMBER(ClassExt, verify_error_), err);
+ } else {
+ SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(ClassExt, verify_error_), err);
+ }
+}
+
+void ClassExt::SetClass(ObjPtr<Class> dalvik_system_ClassExt) {
+ CHECK(dalvik_system_ClassExt != nullptr);
+ dalvik_system_ClassExt_ = GcRoot<Class>(dalvik_system_ClassExt);
+}
+
+void ClassExt::ResetClass() {
+ CHECK(!dalvik_system_ClassExt_.IsNull());
+ dalvik_system_ClassExt_ = GcRoot<Class>(nullptr);
+}
+
+void ClassExt::VisitRoots(RootVisitor* visitor) {
+ dalvik_system_ClassExt_.VisitRootIfNonNull(visitor, RootInfo(kRootStickyClass));
+}
+
+} // namespace mirror
+} // namespace art
diff --git a/runtime/mirror/class_ext.h b/runtime/mirror/class_ext.h
new file mode 100644
index 0000000..35eaae1
--- /dev/null
+++ b/runtime/mirror/class_ext.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2016 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.
+ */
+
+#ifndef ART_RUNTIME_MIRROR_CLASS_EXT_H_
+#define ART_RUNTIME_MIRROR_CLASS_EXT_H_
+
+#include "class-inl.h"
+
+#include "gc_root.h"
+#include "object.h"
+#include "object_callbacks.h"
+#include "string.h"
+
+namespace art {
+
+struct ClassExtOffsets;
+
+namespace mirror {
+
+// C++ mirror of dalvik.system.ClassExt
+class MANAGED ClassExt : public Object {
+ public:
+ static uint32_t ClassSize(PointerSize pointer_size) {
+ uint32_t vtable_entries = Object::kVTableLength;
+ return Class::ComputeClassSize(true, vtable_entries, 0, 0, 0, 0, 0, pointer_size);
+ }
+
+ // Size of an instance of dalvik.system.ClassExt.
+ static constexpr uint32_t InstanceSize() {
+ return sizeof(ClassExt);
+ }
+
+ void SetVerifyError(ObjPtr<Object> obj) REQUIRES_SHARED(Locks::mutator_lock_);
+
+ Object* GetVerifyError() REQUIRES_SHARED(Locks::mutator_lock_) {
+ return GetFieldObject<ClassExt>(OFFSET_OF_OBJECT_MEMBER(ClassExt, verify_error_));
+ }
+
+ static void SetClass(ObjPtr<Class> dalvik_system_ClassExt);
+ static void ResetClass();
+ static void VisitRoots(RootVisitor* visitor) REQUIRES_SHARED(Locks::mutator_lock_);
+
+ static ClassExt* Alloc(Thread* self) REQUIRES_SHARED(Locks::mutator_lock_);
+
+ private:
+ // Field order required by test "ValidateFieldOrderOfJavaCppUnionClasses".
+ HeapReference<Object> verify_error_;
+
+ static GcRoot<Class> dalvik_system_ClassExt_;
+
+ friend struct art::ClassExtOffsets; // for verifying offset information
+ DISALLOW_IMPLICIT_CONSTRUCTORS(ClassExt);
+};
+
+} // namespace mirror
+} // namespace art
+
+#endif // ART_RUNTIME_MIRROR_CLASS_EXT_H_
diff --git a/runtime/well_known_classes.cc b/runtime/well_known_classes.cc
index 2797d85..53d717a 100644
--- a/runtime/well_known_classes.cc
+++ b/runtime/well_known_classes.cc
@@ -393,7 +393,9 @@
}
ObjPtr<mirror::Class> WellKnownClasses::ToClass(jclass global_jclass) {
- return ObjPtr<mirror::Class>::DownCast(Thread::Current()->DecodeJObject(global_jclass));
+ auto ret = ObjPtr<mirror::Class>::DownCast(Thread::Current()->DecodeJObject(global_jclass));
+ DCHECK(!ret.IsNull());
+ return ret;
}
} // namespace art