Merge "Make 946 print stacktrace to System.out"
diff --git a/runtime/art_method.h b/runtime/art_method.h
index 3d51fdd..99d7a49 100644
--- a/runtime/art_method.h
+++ b/runtime/art_method.h
@@ -223,13 +223,10 @@
   }
 
   bool IsObsolete() {
-    // TODO Should maybe make this IsIntrinsic check not needed
-    return !IsIntrinsic() && (GetAccessFlags() & kAccObsoleteMethod) != 0;
+    return (GetAccessFlags() & kAccObsoleteMethod) != 0;
   }
 
   void SetIsObsolete() {
-    // TODO We should really support redefining intrinsic if possible.
-    DCHECK(!IsIntrinsic());
     AddAccessFlags(kAccObsoleteMethod);
   }
 
diff --git a/runtime/class_linker.cc b/runtime/class_linker.cc
index 46f1644..57fc909 100644
--- a/runtime/class_linker.cc
+++ b/runtime/class_linker.cc
@@ -3798,14 +3798,10 @@
 }
 
 void ClassLinker::WriteBarrierForBootOatFileBssRoots(const OatFile* oat_file) {
-  if (!kUseReadBarrier) {
-    WriterMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_);
-    DCHECK(!oat_file->GetBssGcRoots().empty()) << oat_file->GetLocation();
-    if (log_new_roots_ && !ContainsElement(new_bss_roots_boot_oat_files_, oat_file)) {
-      new_bss_roots_boot_oat_files_.push_back(oat_file);
-    }
-  } else {
-    LOG(FATAL) << "UNREACHABLE";
+  WriterMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_);
+  DCHECK(!oat_file->GetBssGcRoots().empty()) << oat_file->GetLocation();
+  if (log_new_roots_ && !ContainsElement(new_bss_roots_boot_oat_files_, oat_file)) {
+    new_bss_roots_boot_oat_files_.push_back(oat_file);
   }
 }
 
diff --git a/runtime/entrypoints/quick/quick_dexcache_entrypoints.cc b/runtime/entrypoints/quick/quick_dexcache_entrypoints.cc
index 47c6b51..355d7b3 100644
--- a/runtime/entrypoints/quick/quick_dexcache_entrypoints.cc
+++ b/runtime/entrypoints/quick/quick_dexcache_entrypoints.cc
@@ -32,12 +32,9 @@
 namespace art {
 
 static inline void BssWriteBarrier(ArtMethod* outer_method) REQUIRES_SHARED(Locks::mutator_lock_) {
-  // For non-CC AOT code, we need a write barrier for the class loader that holds the
-  // GC roots in the .bss. For CC, we do not need to do anything because the roots
-  // we're storing are all referencing to-space and do not need to be re-visited.
-  // However, we do the DCHECK() for the registration of oat files with .bss sections.
-  const DexFile* dex_file =
-      (kUseReadBarrier && !kIsDebugBuild) ? nullptr : outer_method->GetDexFile();
+  // For AOT code, we need a write barrier for the class loader that holds the
+  // GC roots in the .bss.
+  const DexFile* dex_file = outer_method->GetDexFile();
   if (dex_file != nullptr &&
       dex_file->GetOatDexFile() != nullptr &&
       !dex_file->GetOatDexFile()->GetOatFile()->GetBssGcRoots().empty()) {
@@ -50,15 +47,13 @@
           << "Oat file with .bss GC roots was not registered in class table: "
           << dex_file->GetOatDexFile()->GetOatFile()->GetLocation();
     }
-    if (!kUseReadBarrier) {
-      if (class_loader != nullptr) {
-        // Note that we emit the barrier before the compiled code stores the String or Class
-        // as a GC root. This is OK as there is no suspend point point in between.
-        Runtime::Current()->GetHeap()->WriteBarrierEveryFieldOf(class_loader);
-      } else {
-        Runtime::Current()->GetClassLinker()->WriteBarrierForBootOatFileBssRoots(
-            dex_file->GetOatDexFile()->GetOatFile());
-      }
+    if (class_loader != nullptr) {
+      // Note that we emit the barrier before the compiled code stores the String or Class
+      // as a GC root. This is OK as there is no suspend point point in between.
+      Runtime::Current()->GetHeap()->WriteBarrierEveryFieldOf(class_loader);
+    } else {
+      Runtime::Current()->GetClassLinker()->WriteBarrierForBootOatFileBssRoots(
+          dex_file->GetOatDexFile()->GetOatFile());
     }
   }
 }
diff --git a/runtime/gc/collector/concurrent_copying.cc b/runtime/gc/collector/concurrent_copying.cc
index f18ffb4..b939cbe 100644
--- a/runtime/gc/collector/concurrent_copying.cc
+++ b/runtime/gc/collector/concurrent_copying.cc
@@ -53,6 +53,8 @@
 // Slow path mark stack size, increase this if the stack is getting full and it is causing
 // performance problems.
 static constexpr size_t kReadBarrierMarkStackSize = 512 * KB;
+// Verify that there are no missing card marks.
+static constexpr bool kVerifyNoMissingCardMarks = kIsDebugBuild;
 
 ConcurrentCopying::ConcurrentCopying(Heap* heap,
                                      const std::string& name_prefix,
@@ -318,6 +320,9 @@
     TimingLogger::ScopedTiming split("(Paused)FlipCallback", cc->GetTimings());
     // Note: self is not necessarily equal to thread since thread may be suspended.
     Thread* self = Thread::Current();
+    if (kVerifyNoMissingCardMarks) {
+      cc->VerifyNoMissingCardMarks();
+    }
     CHECK(thread == self);
     Locks::mutator_lock_->AssertExclusiveHeld(self);
     cc->region_space_->SetFromSpace(cc->rb_table_, cc->force_evacuate_all_);
@@ -428,6 +433,72 @@
   }
 }
 
+class ConcurrentCopying::VerifyNoMissingCardMarkVisitor {
+ public:
+  VerifyNoMissingCardMarkVisitor(ConcurrentCopying* cc, ObjPtr<mirror::Object> holder)
+    : cc_(cc),
+      holder_(holder) {}
+
+  void operator()(ObjPtr<mirror::Object> obj,
+                  MemberOffset offset,
+                  bool is_static ATTRIBUTE_UNUSED) const
+      REQUIRES_SHARED(Locks::mutator_lock_) ALWAYS_INLINE {
+    if (offset.Uint32Value() != mirror::Object::ClassOffset().Uint32Value()) {
+     CheckReference(obj->GetFieldObject<mirror::Object, kDefaultVerifyFlags, kWithoutReadBarrier>(
+         offset), offset.Uint32Value());
+    }
+  }
+  void operator()(ObjPtr<mirror::Class> klass,
+                  ObjPtr<mirror::Reference> ref) const
+      REQUIRES_SHARED(Locks::mutator_lock_) ALWAYS_INLINE {
+    CHECK(klass->IsTypeOfReferenceClass());
+    this->operator()(ref, mirror::Reference::ReferentOffset(), false);
+  }
+
+  void VisitRootIfNonNull(mirror::CompressedReference<mirror::Object>* root) const
+      REQUIRES_SHARED(Locks::mutator_lock_) {
+    if (!root->IsNull()) {
+      VisitRoot(root);
+    }
+  }
+
+  void VisitRoot(mirror::CompressedReference<mirror::Object>* root) const
+      REQUIRES_SHARED(Locks::mutator_lock_) {
+    CheckReference(root->AsMirrorPtr());
+  }
+
+  void CheckReference(mirror::Object* ref, uint32_t offset = 0) const
+      REQUIRES_SHARED(Locks::mutator_lock_) {
+    CHECK(ref == nullptr || !cc_->region_space_->IsInNewlyAllocatedRegion(ref))
+        << holder_->PrettyTypeOf() << "(" << holder_.Ptr() << ") references object "
+        << ref->PrettyTypeOf() << "(" << ref << ") in newly allocated region at offset=" << offset;
+  }
+
+ private:
+  ConcurrentCopying* const cc_;
+  ObjPtr<mirror::Object> const holder_;
+};
+
+void ConcurrentCopying::VerifyNoMissingCardMarkCallback(mirror::Object* obj, void* arg) {
+  auto* collector = reinterpret_cast<ConcurrentCopying*>(arg);
+  // Objects not on dirty cards should never have references to newly allocated regions.
+  if (!collector->heap_->GetCardTable()->IsDirty(obj)) {
+    VerifyNoMissingCardMarkVisitor visitor(collector, /*holder*/ obj);
+    obj->VisitReferences</*kVisitNativeRoots*/true, kVerifyNone, kWithoutReadBarrier>(
+        visitor,
+        visitor);
+  }
+}
+
+void ConcurrentCopying::VerifyNoMissingCardMarks() {
+  TimingLogger::ScopedTiming split(__FUNCTION__, GetTimings());
+  region_space_->Walk(&VerifyNoMissingCardMarkCallback, this);
+  {
+    ReaderMutexLock rmu(Thread::Current(), *Locks::heap_bitmap_lock_);
+    heap_->GetLiveBitmap()->Walk(&VerifyNoMissingCardMarkCallback, this);
+  }
+}
+
 // Switch threads that from from-space to to-space refs. Forward/mark the thread roots.
 void ConcurrentCopying::FlipThreadRoots() {
   TimingLogger::ScopedTiming split("FlipThreadRoots", GetTimings());
@@ -2330,7 +2401,9 @@
     MutexLock mu(self, mark_stack_lock_);
     CHECK_EQ(pooled_mark_stacks_.size(), kMarkStackPoolSize);
   }
-  {
+  // kVerifyNoMissingCardMarks relies on the region space cards not being cleared to avoid false
+  // positives.
+  if (!kVerifyNoMissingCardMarks) {
     TimingLogger::ScopedTiming split("ClearRegionSpaceCards", GetTimings());
     // We do not currently use the region space cards at all, madvise them away to save ram.
     heap_->GetCardTable()->ClearCardRange(region_space_->Begin(), region_space_->Limit());
diff --git a/runtime/gc/collector/concurrent_copying.h b/runtime/gc/collector/concurrent_copying.h
index 844bb45..11060a8 100644
--- a/runtime/gc/collector/concurrent_copying.h
+++ b/runtime/gc/collector/concurrent_copying.h
@@ -162,6 +162,12 @@
   void VerifyGrayImmuneObjects()
       REQUIRES(Locks::mutator_lock_)
       REQUIRES(!mark_stack_lock_);
+  static void VerifyNoMissingCardMarkCallback(mirror::Object* obj, void* arg)
+      REQUIRES(Locks::mutator_lock_)
+      REQUIRES(!mark_stack_lock_);
+  void VerifyNoMissingCardMarks()
+      REQUIRES(Locks::mutator_lock_)
+      REQUIRES(!mark_stack_lock_);
   size_t ProcessThreadLocalMarkStacks(bool disable_weak_ref_access, Closure* checkpoint_callback)
       REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(!mark_stack_lock_);
   void RevokeThreadLocalMarkStacks(bool disable_weak_ref_access, Closure* checkpoint_callback)
@@ -329,6 +335,7 @@
   class VerifyNoFromSpaceRefsFieldVisitor;
   class VerifyNoFromSpaceRefsObjectVisitor;
   class VerifyNoFromSpaceRefsVisitor;
+  class VerifyNoMissingCardMarkVisitor;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ConcurrentCopying);
 };
diff --git a/runtime/gc/space/region_space.h b/runtime/gc/space/region_space.h
index f3b9595..feab9b0 100644
--- a/runtime/gc/space/region_space.h
+++ b/runtime/gc/space/region_space.h
@@ -176,6 +176,14 @@
     return false;
   }
 
+  bool IsInNewlyAllocatedRegion(mirror::Object* ref) {
+    if (HasAddress(ref)) {
+      Region* r = RefToRegionUnlocked(ref);
+      return r->IsNewlyAllocated();
+    }
+    return false;
+  }
+
   bool IsInUnevacFromSpace(mirror::Object* ref) {
     if (HasAddress(ref)) {
       Region* r = RefToRegionUnlocked(ref);
@@ -351,6 +359,10 @@
       return idx_;
     }
 
+    bool IsNewlyAllocated() const {
+      return is_newly_allocated_;
+    }
+
     bool IsInFromSpace() const {
       return type_ == RegionType::kRegionTypeFromSpace;
     }
diff --git a/runtime/handle_scope.h b/runtime/handle_scope.h
index adb7d8a..f6720bd 100644
--- a/runtime/handle_scope.h
+++ b/runtime/handle_scope.h
@@ -250,7 +250,7 @@
   StackReference<mirror::Object> storage_[kNumReferences];
 
   // Position new handles will be created.
-  size_t pos_ = 0;
+  uint32_t pos_ = 0;
 
   template<size_t kNumRefs> friend class StackHandleScope;
   friend class VariableSizedHandleScope;
@@ -299,12 +299,20 @@
   void VisitRoots(Visitor& visitor) REQUIRES_SHARED(Locks::mutator_lock_);
 
  private:
-  static constexpr size_t kNumReferencesPerScope = 4;
+  static constexpr size_t kLocalScopeSize = 64u;
+  static constexpr size_t kSizeOfReferencesPerScope =
+      kLocalScopeSize
+          - /* BaseHandleScope::link_ */ sizeof(BaseHandleScope*)
+          - /* BaseHandleScope::number_of_references_ */ sizeof(int32_t)
+          - /* FixedSizeHandleScope<>::pos_ */ sizeof(uint32_t);
+  static constexpr size_t kNumReferencesPerScope =
+      kSizeOfReferencesPerScope / sizeof(StackReference<mirror::Object>);
 
   Thread* const self_;
 
   // Linked list of fixed size handle scopes.
   using LocalScopeType = FixedSizeHandleScope<kNumReferencesPerScope>;
+  static_assert(sizeof(LocalScopeType) == kLocalScopeSize, "Unexpected size of LocalScopeType");
   LocalScopeType* current_scope_;
 
   DISALLOW_COPY_AND_ASSIGN(VariableSizedHandleScope);
diff --git a/runtime/interpreter/unstarted_runtime.cc b/runtime/interpreter/unstarted_runtime.cc
index af0478c..80554c2 100644
--- a/runtime/interpreter/unstarted_runtime.cc
+++ b/runtime/interpreter/unstarted_runtime.cc
@@ -1330,17 +1330,18 @@
   result->SetC(string->CharAt(index));
 }
 
-// This allows setting chars from the new style of String objects during compilation.
-void UnstartedRuntime::UnstartedStringSetCharAt(
-    Thread* self, ShadowFrame* shadow_frame, JValue* result ATTRIBUTE_UNUSED, size_t arg_offset) {
-  jint index = shadow_frame->GetVReg(arg_offset + 1);
-  jchar c = shadow_frame->GetVReg(arg_offset + 2);
-  mirror::String* string = shadow_frame->GetVRegReference(arg_offset)->AsString();
+// This allows creating String objects with replaced characters during compilation.
+// String.doReplace(char, char) is called from String.replace(char, char) when there is a match.
+void UnstartedRuntime::UnstartedStringDoReplace(
+    Thread* self, ShadowFrame* shadow_frame, JValue* result, size_t arg_offset) {
+  jchar old_c = shadow_frame->GetVReg(arg_offset + 1);
+  jchar new_c = shadow_frame->GetVReg(arg_offset + 2);
+  ObjPtr<mirror::String> string = shadow_frame->GetVRegReference(arg_offset)->AsString();
   if (string == nullptr) {
-    AbortTransactionOrFail(self, "String.setCharAt with null object");
+    AbortTransactionOrFail(self, "String.replaceWithMatch with null object");
     return;
   }
-  string->SetCharAt(index, c);
+  result->SetL(string->DoReplace(self, old_c, new_c));
 }
 
 // This allows creating the new style of String objects during compilation.
diff --git a/runtime/interpreter/unstarted_runtime_list.h b/runtime/interpreter/unstarted_runtime_list.h
index 6fc7989..e9435e4 100644
--- a/runtime/interpreter/unstarted_runtime_list.h
+++ b/runtime/interpreter/unstarted_runtime_list.h
@@ -63,7 +63,7 @@
   V(RuntimeAvailableProcessors, "int java.lang.Runtime.availableProcessors()") \
   V(StringGetCharsNoCheck, "void java.lang.String.getCharsNoCheck(int, int, char[], int)") \
   V(StringCharAt, "char java.lang.String.charAt(int)") \
-  V(StringSetCharAt, "void java.lang.String.setCharAt(int, char)") \
+  V(StringDoReplace, "java.lang.String java.lang.String.doReplace(char, char)") \
   V(StringFactoryNewStringFromChars, "java.lang.String java.lang.StringFactory.newStringFromChars(int, int, char[])") \
   V(StringFactoryNewStringFromString, "java.lang.String java.lang.StringFactory.newStringFromString(java.lang.String)") \
   V(StringFastSubstring, "java.lang.String java.lang.String.fastSubstring(int, int)") \
diff --git a/runtime/mirror/string-inl.h b/runtime/mirror/string-inl.h
index c2407d7..57b20a1 100644
--- a/runtime/mirror/string-inl.h
+++ b/runtime/mirror/string-inl.h
@@ -36,7 +36,7 @@
 namespace mirror {
 
 inline uint32_t String::ClassSize(PointerSize pointer_size) {
-  uint32_t vtable_entries = Object::kVTableLength + 57;
+  uint32_t vtable_entries = Object::kVTableLength + 56;
   return Class::ComputeClassSize(true, vtable_entries, 0, 0, 0, 1, 2, pointer_size);
 }
 
@@ -311,9 +311,7 @@
 inline bool String::AllASCII(const MemoryType* chars, const int length) {
   static_assert(std::is_unsigned<MemoryType>::value, "Expecting unsigned MemoryType");
   for (int i = 0; i < length; ++i) {
-    // Valid ASCII characters are in range 1..0x7f. Zero is not considered ASCII
-    // because it would complicate the detection of ASCII strings in Modified-UTF8.
-    if ((chars[i] - 1u) >= 0x7fu) {
+    if (!IsASCII(chars[i])) {
       return false;
     }
   }
diff --git a/runtime/mirror/string.cc b/runtime/mirror/string.cc
index 0ab0bd6..884b88a 100644
--- a/runtime/mirror/string.cc
+++ b/runtime/mirror/string.cc
@@ -79,14 +79,55 @@
   }
 }
 
-void String::SetCharAt(int32_t index, uint16_t c) {
-  DCHECK((index >= 0) && (index < GetLength()));
-  if (IsCompressed()) {
-    // TODO: Handle the case where String is compressed and c is non-ASCII
-    GetValueCompressed()[index] = static_cast<uint8_t>(c);
-  } else {
-    GetValue()[index] = c;
+inline bool String::AllASCIIExcept(const uint16_t* chars, int32_t length, uint16_t non_ascii) {
+  DCHECK(!IsASCII(non_ascii));
+  for (int32_t i = 0; i < length; ++i) {
+    if (!IsASCII(chars[i]) && chars[i] != non_ascii) {
+      return false;
+    }
   }
+  return true;
+}
+
+ObjPtr<String> String::DoReplace(Thread* self, uint16_t old_c, uint16_t new_c) {
+  DCHECK(IsCompressed() ? ContainsElement(ArrayRef<uint8_t>(value_compressed_, GetLength()), old_c)
+                        : ContainsElement(ArrayRef<uint16_t>(value_, GetLength()), old_c));
+  int32_t length = GetLength();
+  bool compressible =
+      kUseStringCompression &&
+      IsASCII(new_c) &&
+      (IsCompressed() || (!IsASCII(old_c) && AllASCIIExcept(value_, length, old_c)));
+  gc::AllocatorType allocator_type = Runtime::Current()->GetHeap()->GetCurrentAllocator();
+  const int32_t length_with_flag = String::GetFlaggedCount(GetLength(), compressible);
+  SetStringCountVisitor visitor(length_with_flag);
+  ObjPtr<String> string = Alloc<true>(self, length_with_flag, allocator_type, visitor);
+  if (UNLIKELY(string == nullptr)) {
+    return nullptr;
+  }
+  if (compressible) {
+    auto replace = [old_c, new_c](uint16_t c) {
+      return dchecked_integral_cast<uint8_t>((old_c != c) ? c : new_c);
+    };
+    uint8_t* out = string->value_compressed_;
+    if (LIKELY(IsCompressed())) {  // LIKELY(compressible == IsCompressed())
+      std::transform(value_compressed_, value_compressed_ + length, out, replace);
+    } else {
+      std::transform(value_, value_ + length, out, replace);
+    }
+    DCHECK(kUseStringCompression && AllASCII(out, length));
+  } else {
+    auto replace = [old_c, new_c](uint16_t c) {
+      return (old_c != c) ? c : new_c;
+    };
+    uint16_t* out = string->value_;
+    if (UNLIKELY(IsCompressed())) {  // LIKELY(compressible == IsCompressed())
+      std::transform(value_compressed_, value_compressed_ + length, out, replace);
+    } else {
+      std::transform(value_, value_ + length, out, replace);
+    }
+    DCHECK(!kUseStringCompression || !AllASCII(out, length));
+  }
+  return string;
 }
 
 String* String::AllocFromStrings(Thread* self, Handle<String> string, Handle<String> string2) {
diff --git a/runtime/mirror/string.h b/runtime/mirror/string.h
index 38f6dd4..35ce98e 100644
--- a/runtime/mirror/string.h
+++ b/runtime/mirror/string.h
@@ -94,7 +94,10 @@
 
   uint16_t CharAt(int32_t index) REQUIRES_SHARED(Locks::mutator_lock_);
 
-  void SetCharAt(int32_t index, uint16_t c) REQUIRES_SHARED(Locks::mutator_lock_);
+  // Create a new string where all occurences of `old_c` are replaced with `new_c`.
+  // String.doReplace(char, char) is called from String.replace(char, char) when there is a match.
+  ObjPtr<String> DoReplace(Thread* self, uint16_t old_c, uint16_t new_c)
+      REQUIRES_SHARED(Locks::mutator_lock_);
 
   ObjPtr<String> Intern() REQUIRES_SHARED(Locks::mutator_lock_);
 
@@ -229,6 +232,14 @@
       REQUIRES_SHARED(Locks::mutator_lock_);
 
  private:
+  static constexpr bool IsASCII(uint16_t c) {
+    // Valid ASCII characters are in range 1..0x7f. Zero is not considered ASCII
+    // because it would complicate the detection of ASCII strings in Modified-UTF8.
+    return (c - 1u) < 0x7fu;
+  }
+
+  static bool AllASCIIExcept(const uint16_t* chars, int32_t length, uint16_t non_ascii);
+
   void SetHashCode(int32_t new_hash_code) REQUIRES_SHARED(Locks::mutator_lock_) {
     // Hash code is invariant so use non-transactional mode. Also disable check as we may run inside
     // a transaction.
diff --git a/runtime/modifiers.h b/runtime/modifiers.h
index ae6b31d..461f870 100644
--- a/runtime/modifiers.h
+++ b/runtime/modifiers.h
@@ -45,6 +45,9 @@
 static constexpr uint32_t kAccConstructor =           0x00010000;  // method (dex only) <(cl)init>
 static constexpr uint32_t kAccDeclaredSynchronized =  0x00020000;  // method (dex only)
 static constexpr uint32_t kAccClassIsProxy =          0x00040000;  // class  (dex only)
+// Set to indicate that the ArtMethod is obsolete and has a different DexCache + DexFile from its
+// declaring class. This flag may only be applied to methods.
+static constexpr uint32_t kAccObsoleteMethod =        0x00040000;  // method (runtime)
 // Used by a method to denote that its execution does not need to go through slow path interpreter.
 static constexpr uint32_t kAccSkipAccessChecks =      0x00080000;  // method (dex only)
 // Used by a class to denote that the verifier has attempted to check it at least once.
@@ -67,10 +70,6 @@
 
 // Set by the verifier for a method that could not be verified to follow structured locking.
 static constexpr uint32_t kAccMustCountLocks =        0x02000000;  // method (runtime)
-// Set to indicate that the ArtMethod is obsolete and has a different DexCache from its declaring
-// class.
-// TODO Might want to re-arrange some of these so that we can have obsolete + intrinsic methods.
-static constexpr uint32_t kAccObsoleteMethod =        0x04000000;  // method (runtime)
 
 // Set by the class linker for a method that has only one implementation for a
 // virtual call.
diff --git a/runtime/native/java_lang_String.cc b/runtime/native/java_lang_String.cc
index f1d6ff5..1357338 100644
--- a/runtime/native/java_lang_String.cc
+++ b/runtime/native/java_lang_String.cc
@@ -99,9 +99,11 @@
   return soa.AddLocalReference<jstring>(result);
 }
 
-static void String_setCharAt(JNIEnv* env, jobject java_this, jint index, jchar c) {
+static jstring String_doReplace(JNIEnv* env, jobject java_this, jchar old_c, jchar new_c) {
   ScopedFastNativeObjectAccess soa(env);
-  soa.Decode<mirror::String>(java_this)->SetCharAt(index, c);
+  ObjPtr<mirror::String> result =
+      soa.Decode<mirror::String>(java_this)->DoReplace(soa.Self(), old_c, new_c);
+  return soa.AddLocalReference<jstring>(result);
 }
 
 static jcharArray String_toCharArray(JNIEnv* env, jobject java_this) {
@@ -114,11 +116,11 @@
   NATIVE_METHOD(String, charAt, "!(I)C"),
   NATIVE_METHOD(String, compareTo, "!(Ljava/lang/String;)I"),
   NATIVE_METHOD(String, concat, "!(Ljava/lang/String;)Ljava/lang/String;"),
+  NATIVE_METHOD(String, doReplace, "!(CC)Ljava/lang/String;"),
   NATIVE_METHOD(String, fastIndexOf, "!(II)I"),
   NATIVE_METHOD(String, fastSubstring, "!(II)Ljava/lang/String;"),
   NATIVE_METHOD(String, getCharsNoCheck, "!(II[CI)V"),
   NATIVE_METHOD(String, intern, "!()Ljava/lang/String;"),
-  NATIVE_METHOD(String, setCharAt, "!(IC)V"),
   NATIVE_METHOD(String, toCharArray, "!()[C"),
 };
 
diff --git a/runtime/openjdkjvmti/OpenjdkJvmTi.cc b/runtime/openjdkjvmti/OpenjdkJvmTi.cc
index a815a60..77ca9ce 100644
--- a/runtime/openjdkjvmti/OpenjdkJvmTi.cc
+++ b/runtime/openjdkjvmti/OpenjdkJvmTi.cc
@@ -1188,13 +1188,13 @@
     ENSURE_NON_NULL(name_ptr);
     switch (error) {
 #define ERROR_CASE(e) case (JVMTI_ERROR_ ## e) : do { \
-          jvmtiError res = CopyString(env, \
-                                      "JVMTI_ERROR_"#e, \
-                                      reinterpret_cast<unsigned char**>(name_ptr)); \
-          if (res != OK) { \
+          jvmtiError res; \
+          JvmtiUniquePtr<char[]> copy = CopyString(env, "JVMTI_ERROR_"#e, &res); \
+          if (copy == nullptr) { \
             *name_ptr = nullptr; \
             return res; \
           } else { \
+            *name_ptr = copy.release(); \
             return OK; \
           } \
         } while (false)
@@ -1248,13 +1248,13 @@
       ERROR_CASE(INVALID_ENVIRONMENT);
 #undef ERROR_CASE
       default: {
-        jvmtiError res = CopyString(env,
-                                    "JVMTI_ERROR_UNKNOWN",
-                                    reinterpret_cast<unsigned char**>(name_ptr));
-        if (res != OK) {
+        jvmtiError res;
+        JvmtiUniquePtr<char[]> copy = CopyString(env, "JVMTI_ERROR_UNKNOWN", &res);
+        if (copy == nullptr) {
           *name_ptr = nullptr;
           return res;
         } else {
+          *name_ptr = copy.release();
           return ERR(ILLEGAL_ARGUMENT);
         }
       }
diff --git a/runtime/openjdkjvmti/art_jvmti.h b/runtime/openjdkjvmti/art_jvmti.h
index 106165c..99139a1 100644
--- a/runtime/openjdkjvmti/art_jvmti.h
+++ b/runtime/openjdkjvmti/art_jvmti.h
@@ -33,6 +33,7 @@
 #define ART_RUNTIME_OPENJDKJVMTI_ART_JVMTI_H_
 
 #include <memory>
+#include <type_traits>
 
 #include <jni.h>
 
@@ -86,6 +87,7 @@
   return ret_value;
 }
 
+template <typename T>
 class JvmtiDeleter {
  public:
   JvmtiDeleter() : env_(nullptr) {}
@@ -95,9 +97,9 @@
   JvmtiDeleter(JvmtiDeleter&&) = default;
   JvmtiDeleter& operator=(const JvmtiDeleter&) = default;
 
-  void operator()(unsigned char* ptr) const {
+  void operator()(T* ptr) const {
     CHECK(env_ != nullptr);
-    jvmtiError ret = env_->Deallocate(ptr);
+    jvmtiError ret = env_->Deallocate(reinterpret_cast<unsigned char*>(ptr));
     CHECK(ret == ERR(NONE));
   }
 
@@ -105,12 +107,65 @@
   mutable jvmtiEnv* env_;
 };
 
-using JvmtiUniquePtr = std::unique_ptr<unsigned char, JvmtiDeleter>;
+template <typename T>
+class JvmtiDeleter<T[]> {
+  public:
+  JvmtiDeleter() : env_(nullptr) {}
+  explicit JvmtiDeleter(jvmtiEnv* env) : env_(env) {}
+
+  JvmtiDeleter(JvmtiDeleter&) = default;
+  JvmtiDeleter(JvmtiDeleter&&) = default;
+  JvmtiDeleter& operator=(const JvmtiDeleter&) = default;
+
+  template <typename U>
+  void operator()(U* ptr) const {
+    CHECK(env_ != nullptr);
+    jvmtiError ret = env_->Deallocate(reinterpret_cast<unsigned char*>(ptr));
+    CHECK(ret == ERR(NONE));
+  }
+
+ private:
+  mutable jvmtiEnv* env_;
+};
+
+template <typename T>
+using JvmtiUniquePtr = std::unique_ptr<T, JvmtiDeleter<T>>;
 
 template <typename T>
 ALWAYS_INLINE
-static inline JvmtiUniquePtr MakeJvmtiUniquePtr(jvmtiEnv* env, T* mem) {
-  return JvmtiUniquePtr(reinterpret_cast<unsigned char*>(mem), JvmtiDeleter(env));
+static inline JvmtiUniquePtr<T> MakeJvmtiUniquePtr(jvmtiEnv* env, T* mem) {
+  return JvmtiUniquePtr<T>(mem, JvmtiDeleter<T>(env));
+}
+
+template <typename T>
+ALWAYS_INLINE
+static inline JvmtiUniquePtr<T> MakeJvmtiUniquePtr(jvmtiEnv* env, unsigned char* mem) {
+  return JvmtiUniquePtr<T>(reinterpret_cast<T*>(mem), JvmtiDeleter<T>(env));
+}
+
+template <typename T>
+ALWAYS_INLINE
+static inline JvmtiUniquePtr<T> AllocJvmtiUniquePtr(jvmtiEnv* env, jvmtiError* error) {
+  unsigned char* tmp;
+  *error = env->Allocate(sizeof(T), &tmp);
+  if (*error != ERR(NONE)) {
+    return JvmtiUniquePtr<T>();
+  }
+  return JvmtiUniquePtr<T>(tmp, JvmtiDeleter<T>(env));
+}
+
+template <typename T>
+ALWAYS_INLINE
+static inline JvmtiUniquePtr<T> AllocJvmtiUniquePtr(jvmtiEnv* env,
+                                                    size_t count,
+                                                    jvmtiError* error) {
+  unsigned char* tmp;
+  *error = env->Allocate(sizeof(typename std::remove_extent<T>::type) * count, &tmp);
+  if (*error != ERR(NONE)) {
+    return JvmtiUniquePtr<T>();
+  }
+  return JvmtiUniquePtr<T>(reinterpret_cast<typename std::remove_extent<T>::type*>(tmp),
+                           JvmtiDeleter<T>(env));
 }
 
 ALWAYS_INLINE
@@ -129,15 +184,12 @@
 }
 
 ALWAYS_INLINE
-static inline jvmtiError CopyString(jvmtiEnv* env, const char* src, unsigned char** copy) {
+static inline JvmtiUniquePtr<char[]> CopyString(jvmtiEnv* env, const char* src, jvmtiError* error) {
   size_t len = strlen(src) + 1;
-  unsigned char* buf;
-  jvmtiError ret = env->Allocate(len, &buf);
-  if (ret != ERR(NONE)) {
-    return ret;
+  JvmtiUniquePtr<char[]> ret = AllocJvmtiUniquePtr<char[]>(env, len, error);
+  if (ret != nullptr) {
+    strcpy(ret.get(), src);
   }
-  strcpy(reinterpret_cast<char*>(buf), src);
-  *copy = buf;
   return ret;
 }
 
diff --git a/runtime/openjdkjvmti/ti_class.cc b/runtime/openjdkjvmti/ti_class.cc
index a8a0ded..4282e38 100644
--- a/runtime/openjdkjvmti/ti_class.cc
+++ b/runtime/openjdkjvmti/ti_class.cc
@@ -673,18 +673,17 @@
     return ERR(INVALID_CLASS);
   }
 
-  JvmtiUniquePtr sig_copy;
+  JvmtiUniquePtr<char[]> sig_copy;
   if (signature_ptr != nullptr) {
     std::string storage;
     const char* descriptor = klass->GetDescriptor(&storage);
 
-    unsigned char* tmp;
-    jvmtiError ret = CopyString(env, descriptor, &tmp);
-    if (ret != ERR(NONE)) {
+    jvmtiError ret;
+    sig_copy = CopyString(env, descriptor, &ret);
+    if (sig_copy == nullptr) {
       return ret;
     }
-    sig_copy = MakeJvmtiUniquePtr(env, tmp);
-    *signature_ptr = reinterpret_cast<char*>(tmp);
+    *signature_ptr = sig_copy.get();
   }
 
   if (generic_ptr != nullptr) {
@@ -700,12 +699,12 @@
           oss << str_array->Get(i)->ToModifiedUtf8();
         }
         std::string output_string = oss.str();
-        unsigned char* tmp;
-        jvmtiError ret = CopyString(env, output_string.c_str(), &tmp);
-        if (ret != ERR(NONE)) {
+        jvmtiError ret;
+        JvmtiUniquePtr<char[]> copy = CopyString(env, output_string.c_str(), &ret);
+        if (copy == nullptr) {
           return ret;
         }
-        *generic_ptr = reinterpret_cast<char*>(tmp);
+        *generic_ptr = copy.release();
       } else if (soa.Self()->IsExceptionPending()) {
         // TODO: Should we report an error here?
         soa.Self()->ClearException();
diff --git a/runtime/openjdkjvmti/ti_class_definition.h b/runtime/openjdkjvmti/ti_class_definition.h
index dbe5da2..3c251d4 100644
--- a/runtime/openjdkjvmti/ti_class_definition.h
+++ b/runtime/openjdkjvmti/ti_class_definition.h
@@ -46,7 +46,7 @@
   std::string name;
   jobject protection_domain;
   jint dex_len;
-  JvmtiUniquePtr dex_data;
+  JvmtiUniquePtr<unsigned char> dex_data;
   art::ArraySlice<const unsigned char> original_dex_file;
 
   ArtClassDefinition() = default;
diff --git a/runtime/openjdkjvmti/ti_field.cc b/runtime/openjdkjvmti/ti_field.cc
index 131e6c3..8c3f2ff 100644
--- a/runtime/openjdkjvmti/ti_field.cc
+++ b/runtime/openjdkjvmti/ti_field.cc
@@ -63,31 +63,29 @@
   art::ScopedObjectAccess soa(art::Thread::Current());
   art::ArtField* art_field = art::jni::DecodeArtField(field);
 
-  JvmtiUniquePtr name_copy;
+  JvmtiUniquePtr<char[]> name_copy;
   if (name_ptr != nullptr) {
     const char* field_name = art_field->GetName();
     if (field_name == nullptr) {
       field_name = "<error>";
     }
-    unsigned char* tmp;
-    jvmtiError ret = CopyString(env, field_name, &tmp);
-    if (ret != ERR(NONE)) {
+    jvmtiError ret;
+    name_copy = CopyString(env, field_name, &ret);
+    if (name_copy == nullptr) {
       return ret;
     }
-    name_copy = MakeJvmtiUniquePtr(env, tmp);
-    *name_ptr = reinterpret_cast<char*>(tmp);
+    *name_ptr = name_copy.get();
   }
 
-  JvmtiUniquePtr signature_copy;
+  JvmtiUniquePtr<char[]> signature_copy;
   if (signature_ptr != nullptr) {
     const char* sig = art_field->GetTypeDescriptor();
-    unsigned char* tmp;
-    jvmtiError ret = CopyString(env, sig, &tmp);
-    if (ret != ERR(NONE)) {
+    jvmtiError ret;
+    signature_copy = CopyString(env, sig, &ret);
+    if (signature_copy == nullptr) {
       return ret;
     }
-    signature_copy = MakeJvmtiUniquePtr(env, tmp);
-    *signature_ptr = reinterpret_cast<char*>(tmp);
+    *signature_ptr = signature_copy.get();
   }
 
   // TODO: Support generic signature.
@@ -102,12 +100,12 @@
           oss << str_array->Get(i)->ToModifiedUtf8();
         }
         std::string output_string = oss.str();
-        unsigned char* tmp;
-        jvmtiError ret = CopyString(env, output_string.c_str(), &tmp);
-        if (ret != ERR(NONE)) {
+        jvmtiError ret;
+        JvmtiUniquePtr<char[]> copy = CopyString(env, output_string.c_str(), &ret);
+        if (copy == nullptr) {
           return ret;
         }
-        *generic_ptr = reinterpret_cast<char*>(tmp);
+        *generic_ptr = copy.release();
       } else if (soa.Self()->IsExceptionPending()) {
         // TODO: Should we report an error here?
         soa.Self()->ClearException();
diff --git a/runtime/openjdkjvmti/ti_method.cc b/runtime/openjdkjvmti/ti_method.cc
index a6cfcc1..bc73029 100644
--- a/runtime/openjdkjvmti/ti_method.cc
+++ b/runtime/openjdkjvmti/ti_method.cc
@@ -110,35 +110,32 @@
   art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
   art_method = art_method->GetInterfaceMethodIfProxy(art::kRuntimePointerSize);
 
-  JvmtiUniquePtr name_copy;
+  JvmtiUniquePtr<char[]> name_copy;
   if (name_ptr != nullptr) {
     const char* method_name = art_method->GetName();
     if (method_name == nullptr) {
       method_name = "<error>";
     }
-    unsigned char* tmp;
-    jvmtiError ret = CopyString(env, method_name, &tmp);
-    if (ret != ERR(NONE)) {
+    jvmtiError ret;
+    name_copy = CopyString(env, method_name, &ret);
+    if (name_copy == nullptr) {
       return ret;
     }
-    name_copy = MakeJvmtiUniquePtr(env, tmp);
-    *name_ptr = reinterpret_cast<char*>(tmp);
+    *name_ptr = name_copy.get();
   }
 
-  JvmtiUniquePtr signature_copy;
+  JvmtiUniquePtr<char[]> signature_copy;
   if (signature_ptr != nullptr) {
     const art::Signature sig = art_method->GetSignature();
     std::string str = sig.ToString();
-    unsigned char* tmp;
-    jvmtiError ret = CopyString(env, str.c_str(), &tmp);
-    if (ret != ERR(NONE)) {
+    jvmtiError ret;
+    signature_copy = CopyString(env, str.c_str(), &ret);
+    if (signature_copy == nullptr) {
       return ret;
     }
-    signature_copy = MakeJvmtiUniquePtr(env, tmp);
-    *signature_ptr = reinterpret_cast<char*>(tmp);
+    *signature_ptr = signature_copy.get();
   }
 
-  // TODO: Support generic signature.
   if (generic_ptr != nullptr) {
     *generic_ptr = nullptr;
     if (!art_method->GetDeclaringClass()->IsProxyClass()) {
@@ -150,12 +147,12 @@
           oss << str_array->Get(i)->ToModifiedUtf8();
         }
         std::string output_string = oss.str();
-        unsigned char* tmp;
-        jvmtiError ret = CopyString(env, output_string.c_str(), &tmp);
-        if (ret != ERR(NONE)) {
+        jvmtiError ret;
+        JvmtiUniquePtr<char[]> generic_copy = CopyString(env, output_string.c_str(), &ret);
+        if (generic_copy == nullptr) {
           return ret;
         }
-        *generic_ptr = reinterpret_cast<char*>(tmp);
+        *generic_ptr = generic_copy.release();
       } else if (soa.Self()->IsExceptionPending()) {
         // TODO: Should we report an error here?
         soa.Self()->ClearException();
diff --git a/runtime/openjdkjvmti/ti_properties.cc b/runtime/openjdkjvmti/ti_properties.cc
index 46b9e71..4f4f013 100644
--- a/runtime/openjdkjvmti/ti_properties.cc
+++ b/runtime/openjdkjvmti/ti_properties.cc
@@ -82,71 +82,69 @@
 static constexpr const char* kPropertyLibraryPath = "java.library.path";
 static constexpr const char* kPropertyClassPath = "java.class.path";
 
-static jvmtiError Copy(jvmtiEnv* env, const char* in, char** out) {
-  unsigned char* data = nullptr;
-  jvmtiError result = CopyString(env, in, &data);
-  *out = reinterpret_cast<char*>(data);
-  return result;
-}
-
 jvmtiError PropertiesUtil::GetSystemProperties(jvmtiEnv* env,
                                                jint* count_ptr,
                                                char*** property_ptr) {
   if (count_ptr == nullptr || property_ptr == nullptr) {
     return ERR(NULL_POINTER);
   }
-  unsigned char* array_data;
-  jvmtiError array_alloc_result = env->Allocate((kPropertiesSize + 2) * sizeof(char*), &array_data);
-  if (array_alloc_result != ERR(NONE)) {
+  jvmtiError array_alloc_result;
+  JvmtiUniquePtr<char*[]> array_data_ptr = AllocJvmtiUniquePtr<char*[]>(env,
+                                                                        kPropertiesSize + 2,
+                                                                        &array_alloc_result);
+  if (array_data_ptr == nullptr) {
     return array_alloc_result;
   }
-  JvmtiUniquePtr array_data_ptr = MakeJvmtiUniquePtr(env, array_data);
-  char** array = reinterpret_cast<char**>(array_data);
 
-  std::vector<JvmtiUniquePtr> property_copies;
+  std::vector<JvmtiUniquePtr<char[]>> property_copies;
 
   {
-    char* libpath_data;
-    jvmtiError libpath_result = Copy(env, kPropertyLibraryPath, &libpath_data);
-    if (libpath_result != ERR(NONE)) {
+    jvmtiError libpath_result;
+    JvmtiUniquePtr<char[]> libpath_data = CopyString(env, kPropertyLibraryPath, &libpath_result);
+    if (libpath_data == nullptr) {
       return libpath_result;
     }
-    array[0] = libpath_data;
-    property_copies.push_back(MakeJvmtiUniquePtr(env, libpath_data));
+    array_data_ptr.get()[0] = libpath_data.get();
+    property_copies.push_back(std::move(libpath_data));
   }
 
   {
-    char* classpath_data;
-    jvmtiError classpath_result = Copy(env, kPropertyClassPath, &classpath_data);
-    if (classpath_result != ERR(NONE)) {
+    jvmtiError classpath_result;
+    JvmtiUniquePtr<char[]> classpath_data = CopyString(env, kPropertyClassPath, &classpath_result);
+    if (classpath_data == nullptr) {
       return classpath_result;
     }
-    array[1] = classpath_data;
-    property_copies.push_back(MakeJvmtiUniquePtr(env, classpath_data));
+    array_data_ptr.get()[1] = classpath_data.get();
+    property_copies.push_back(std::move(classpath_data));
   }
 
   for (size_t i = 0; i != kPropertiesSize; ++i) {
-    char* data;
-    jvmtiError data_result = Copy(env, kProperties[i][0], &data);
-    if (data_result != ERR(NONE)) {
+    jvmtiError data_result;
+    JvmtiUniquePtr<char[]> data = CopyString(env, kProperties[i][0], &data_result);
+    if (data == nullptr) {
       return data_result;
     }
-    array[i + 2] = data;
-    property_copies.push_back(MakeJvmtiUniquePtr(env, data));
+    array_data_ptr.get()[i + 2] = data.get();
+    property_copies.push_back(std::move(data));
   }
 
   // Everything is OK, release the data.
-  array_data_ptr.release();
+  *count_ptr = kPropertiesSize + 2;
+  *property_ptr = array_data_ptr.release();
   for (auto& uptr : property_copies) {
     uptr.release();
   }
 
-  *count_ptr = kPropertiesSize + 2;
-  *property_ptr = array;
-
   return ERR(NONE);
 }
 
+static jvmtiError Copy(jvmtiEnv* env, const char* in, char** out) {
+  jvmtiError result;
+  JvmtiUniquePtr<char[]> data = CopyString(env, in, &result);
+  *out = data.release();
+  return result;
+}
+
 jvmtiError PropertiesUtil::GetSystemProperty(jvmtiEnv* env,
                                              const char* property,
                                              char** value_ptr) {
diff --git a/runtime/openjdkjvmti/ti_redefine.cc b/runtime/openjdkjvmti/ti_redefine.cc
index 8436045..16e93db 100644
--- a/runtime/openjdkjvmti/ti_redefine.cc
+++ b/runtime/openjdkjvmti/ti_redefine.cc
@@ -170,10 +170,6 @@
       // We cannot ensure that the right dex file is used in inlined frames so we don't support
       // redefining them.
       DCHECK(!IsInInlinedFrame()) << "Inlined frames are not supported when using redefinition";
-      // TODO We should really support intrinsic obsolete methods.
-      // TODO We should really support redefining intrinsics.
-      // We don't support intrinsics so check for them here.
-      DCHECK(!old_method->IsIntrinsic());
       art::ArtMethod* new_obsolete_method = obsolete_maps_->FindObsoleteVersion(old_method);
       if (new_obsolete_method == nullptr) {
         // Create a new Obsolete Method and put it in the list.
@@ -396,8 +392,8 @@
     *error_msg_ = "Unable to get class signature!";
     return ret;
   }
-  JvmtiUniquePtr generic_unique_ptr(MakeJvmtiUniquePtr(env, generic_ptr_unused));
-  JvmtiUniquePtr signature_unique_ptr(MakeJvmtiUniquePtr(env, signature_ptr));
+  JvmtiUniquePtr<char> generic_unique_ptr(MakeJvmtiUniquePtr(env, generic_ptr_unused));
+  JvmtiUniquePtr<char> signature_unique_ptr(MakeJvmtiUniquePtr(env, signature_ptr));
   std::unique_ptr<art::MemMap> map(MoveDataToMemMap(original_dex_location,
                                                     def.dex_len,
                                                     def.dex_data.get(),
@@ -518,6 +514,11 @@
   CallbackCtx ctx(&map, linker->GetAllocatorForClassLoader(art_klass->GetClassLoader()));
   // Add all the declared methods to the map
   for (auto& m : art_klass->GetDeclaredMethods(art::kRuntimePointerSize)) {
+    if (m.IsIntrinsic()) {
+      LOG(WARNING) << "Redefining intrinsic method " << m.PrettyMethod() << ". This may cause the "
+                   << "unexpected use of the original definition of " << m.PrettyMethod() << "in "
+                   << "methods that have already been compiled.";
+    }
     // It is possible to simply filter out some methods where they cannot really become obsolete,
     // such as native methods and keep their original (possibly optimized) implementations. We don't
     // do this, however, since we would need to mark these functions (still in the classes
@@ -526,8 +527,6 @@
     // error checking from the interpreter which ensure we don't try to start executing obsolete
     // methods.
     ctx.obsolete_methods.insert(&m);
-    // TODO Allow this or check in IsModifiableClass.
-    DCHECK(!m.IsIntrinsic());
   }
   {
     art::MutexLock mu(driver_->self_, *art::Locks::thread_list_lock_);
@@ -1143,6 +1142,10 @@
                       holder.GetOriginalDexFileBytes(counter));
     counter++;
   }
+  // TODO We should check for if any of the redefined methods are intrinsic methods here and, if any
+  // are, force a full-world deoptimization before finishing redefinition. If we don't do this then
+  // methods that have been jitted prior to the current redefinition being applied might continue
+  // to use the old versions of the intrinsics!
   // TODO Shrink the obsolete method maps if possible?
   // TODO Put this into a scoped thing.
   runtime_->GetThreadList()->ResumeAll();
@@ -1193,6 +1196,8 @@
     linker->SetEntryPointsToInterpreter(&method);
     method.SetCodeItemOffset(dex_file_->FindCodeItemOffset(class_def, dex_method_idx));
     method.SetDexCacheResolvedMethods(new_dex_cache->GetResolvedMethods(), image_pointer_size);
+    // Clear all the intrinsics related flags.
+    method.ClearAccessFlags(art::kAccIntrinsic | (~art::kAccFlagsNotUsedByIntrinsic));
     // Notify the jit that this method is redefined.
     art::jit::Jit* jit = driver_->runtime_->GetJit();
     if (jit != nullptr) {
diff --git a/runtime/openjdkjvmti/ti_thread.cc b/runtime/openjdkjvmti/ti_thread.cc
index f8f8fa6..788ac30 100644
--- a/runtime/openjdkjvmti/ti_thread.cc
+++ b/runtime/openjdkjvmti/ti_thread.cc
@@ -186,17 +186,17 @@
     return ERR(INVALID_THREAD);
   }
 
-  JvmtiUniquePtr name_uptr;
+  JvmtiUniquePtr<char[]> name_uptr;
   if (self != nullptr) {
     // Have a native thread object, this thread is alive.
     std::string name;
     self->GetThreadName(name);
-    jvmtiError name_result = CopyString(
-        env, name.c_str(), reinterpret_cast<unsigned char**>(&info_ptr->name));
-    if (name_result != ERR(NONE)) {
+    jvmtiError name_result;
+    name_uptr = CopyString(env, name.c_str(), &name_result);
+    if (name_uptr == nullptr) {
       return name_result;
     }
-    name_uptr = MakeJvmtiUniquePtr(env, info_ptr->name);
+    info_ptr->name = name_uptr.get();
 
     info_ptr->priority = self->GetNativePriority();
 
@@ -239,12 +239,12 @@
       } else {
         name_cstr = "";
       }
-      jvmtiError name_result = CopyString(
-          env, name_cstr, reinterpret_cast<unsigned char**>(&info_ptr->name));
-      if (name_result != ERR(NONE)) {
+      jvmtiError name_result;
+      name_uptr = CopyString(env, name_cstr, &name_result);
+      if (name_uptr == nullptr) {
         return name_result;
       }
-      name_uptr = MakeJvmtiUniquePtr(env, info_ptr->name);
+      info_ptr->name = name_uptr.get();
     }
 
     // Priority.
diff --git a/runtime/openjdkjvmti/ti_threadgroup.cc b/runtime/openjdkjvmti/ti_threadgroup.cc
index 1423874..df14333 100644
--- a/runtime/openjdkjvmti/ti_threadgroup.cc
+++ b/runtime/openjdkjvmti/ti_threadgroup.cc
@@ -116,11 +116,12 @@
       tmp_str = name_obj->ToModifiedUtf8();
       tmp_cstr = tmp_str.c_str();
     }
-    jvmtiError result =
-        CopyString(env, tmp_cstr, reinterpret_cast<unsigned char**>(&info_ptr->name));
-    if (result != ERR(NONE)) {
+    jvmtiError result;
+    JvmtiUniquePtr<char[]> copy = CopyString(env, tmp_cstr, &result);
+    if (copy == nullptr) {
       return result;
     }
+    info_ptr->name = copy.release();
   }
 
   // Parent.
@@ -239,45 +240,38 @@
   std::vector<art::ObjPtr<art::mirror::Object>> thread_groups;
   GetChildThreadGroups(thread_group, &thread_groups);
 
-  jthread* thread_data = nullptr;
-  JvmtiUniquePtr peers_uptr;
+  JvmtiUniquePtr<jthread[]> peers_uptr;
   if (!thread_peers.empty()) {
-    unsigned char* data;
-    jvmtiError res = env->Allocate(sizeof(jthread) * thread_peers.size(), &data);
-    if (res != ERR(NONE)) {
+    jvmtiError res;
+    peers_uptr = AllocJvmtiUniquePtr<jthread[]>(env, thread_peers.size(), &res);
+    if (peers_uptr == nullptr) {
       return res;
     }
-    thread_data = reinterpret_cast<jthread*>(data);
-    peers_uptr = MakeJvmtiUniquePtr(env, data);
   }
 
-  jthreadGroup* group_data = nullptr;
+  JvmtiUniquePtr<jthreadGroup[]> group_uptr;
   if (!thread_groups.empty()) {
-    unsigned char* data;
-    jvmtiError res = env->Allocate(sizeof(jthreadGroup) * thread_groups.size(), &data);
-    if (res != ERR(NONE)) {
+    jvmtiError res;
+    group_uptr = AllocJvmtiUniquePtr<jthreadGroup[]>(env, thread_groups.size(), &res);
+    if (group_uptr == nullptr) {
       return res;
     }
-    group_data = reinterpret_cast<jthreadGroup*>(data);
   }
 
   // Can't fail anymore from here on.
 
   // Copy data into out buffers.
   for (size_t i = 0; i != thread_peers.size(); ++i) {
-    thread_data[i] = soa.AddLocalReference<jthread>(thread_peers[i]);
+    peers_uptr[i] = soa.AddLocalReference<jthread>(thread_peers[i]);
   }
   for (size_t i = 0; i != thread_groups.size(); ++i) {
-    group_data[i] = soa.AddLocalReference<jthreadGroup>(thread_groups[i]);
+    group_uptr[i] = soa.AddLocalReference<jthreadGroup>(thread_groups[i]);
   }
 
   *thread_count_ptr = static_cast<jint>(thread_peers.size());
-  *threads_ptr = thread_data;
+  *threads_ptr = peers_uptr.release();
   *group_count_ptr = static_cast<jint>(thread_groups.size());
-  *groups_ptr = group_data;
-
-  // Everything's fine.
-  peers_uptr.release();
+  *groups_ptr = group_uptr.release();
 
   return ERR(NONE);
 }
diff --git a/test/100-reflect2/expected.txt b/test/100-reflect2/expected.txt
index dd89d64..e2a1001 100644
--- a/test/100-reflect2/expected.txt
+++ b/test/100-reflect2/expected.txt
@@ -33,7 +33,7 @@
 14 (class java.lang.Short)
 [java.lang.String(int,int,char[]), public java.lang.String(), public java.lang.String(byte[]), public java.lang.String(byte[],int), public java.lang.String(byte[],int,int), public java.lang.String(byte[],int,int,int), public java.lang.String(byte[],int,int,java.lang.String) throws java.io.UnsupportedEncodingException, public java.lang.String(byte[],int,int,java.nio.charset.Charset), public java.lang.String(byte[],java.lang.String) throws java.io.UnsupportedEncodingException, public java.lang.String(byte[],java.nio.charset.Charset), public java.lang.String(char[]), public java.lang.String(char[],int,int), public java.lang.String(int[],int,int), public java.lang.String(java.lang.String), public java.lang.String(java.lang.StringBuffer), public java.lang.String(java.lang.StringBuilder)]
 [private final int java.lang.String.count, private int java.lang.String.hash, private static final java.io.ObjectStreamField[] java.lang.String.serialPersistentFields, private static final long java.lang.String.serialVersionUID, public static final java.util.Comparator java.lang.String.CASE_INSENSITIVE_ORDER]
-[native void java.lang.String.getCharsNoCheck(int,int,char[],int), native void java.lang.String.setCharAt(int,char), private boolean java.lang.String.nonSyncContentEquals(java.lang.AbstractStringBuilder), private int java.lang.String.indexOfSupplementary(int,int), private int java.lang.String.lastIndexOfSupplementary(int,int), private native int java.lang.String.fastIndexOf(int,int), private native java.lang.String java.lang.String.fastSubstring(int,int), public boolean java.lang.String.contains(java.lang.CharSequence), public boolean java.lang.String.contentEquals(java.lang.CharSequence), public boolean java.lang.String.contentEquals(java.lang.StringBuffer), public boolean java.lang.String.endsWith(java.lang.String), public boolean java.lang.String.equals(java.lang.Object), public boolean java.lang.String.equalsIgnoreCase(java.lang.String), public boolean java.lang.String.isEmpty(), public boolean java.lang.String.matches(java.lang.String), public boolean java.lang.String.regionMatches(boolean,int,java.lang.String,int,int), public boolean java.lang.String.regionMatches(int,java.lang.String,int,int), public boolean java.lang.String.startsWith(java.lang.String), public boolean java.lang.String.startsWith(java.lang.String,int), public byte[] java.lang.String.getBytes(), public byte[] java.lang.String.getBytes(java.lang.String) throws java.io.UnsupportedEncodingException, public byte[] java.lang.String.getBytes(java.nio.charset.Charset), public int java.lang.String.codePointAt(int), public int java.lang.String.codePointBefore(int), public int java.lang.String.codePointCount(int,int), public int java.lang.String.compareTo(java.lang.Object), public int java.lang.String.compareToIgnoreCase(java.lang.String), public int java.lang.String.hashCode(), public int java.lang.String.indexOf(int), public int java.lang.String.indexOf(int,int), public int java.lang.String.indexOf(java.lang.String), public int java.lang.String.indexOf(java.lang.String,int), public int java.lang.String.lastIndexOf(int), public int java.lang.String.lastIndexOf(int,int), public int java.lang.String.lastIndexOf(java.lang.String), public int java.lang.String.lastIndexOf(java.lang.String,int), public int java.lang.String.length(), public int java.lang.String.offsetByCodePoints(int,int), public java.lang.CharSequence java.lang.String.subSequence(int,int), public java.lang.String java.lang.String.replace(char,char), public java.lang.String java.lang.String.replace(java.lang.CharSequence,java.lang.CharSequence), public java.lang.String java.lang.String.replaceAll(java.lang.String,java.lang.String), public java.lang.String java.lang.String.replaceFirst(java.lang.String,java.lang.String), public java.lang.String java.lang.String.substring(int), public java.lang.String java.lang.String.substring(int,int), public java.lang.String java.lang.String.toLowerCase(), public java.lang.String java.lang.String.toLowerCase(java.util.Locale), public java.lang.String java.lang.String.toString(), public java.lang.String java.lang.String.toUpperCase(), public java.lang.String java.lang.String.toUpperCase(java.util.Locale), public java.lang.String java.lang.String.trim(), public java.lang.String[] java.lang.String.split(java.lang.String), public java.lang.String[] java.lang.String.split(java.lang.String,int), public native char java.lang.String.charAt(int), public native char[] java.lang.String.toCharArray(), public native int java.lang.String.compareTo(java.lang.String), public native java.lang.String java.lang.String.concat(java.lang.String), public native java.lang.String java.lang.String.intern(), public static java.lang.String java.lang.String.copyValueOf(char[]), public static java.lang.String java.lang.String.copyValueOf(char[],int,int), public static java.lang.String java.lang.String.format(java.lang.String,java.lang.Object[]), public static java.lang.String java.lang.String.format(java.util.Locale,java.lang.String,java.lang.Object[]), public static java.lang.String java.lang.String.join(java.lang.CharSequence,java.lang.CharSequence[]), public static java.lang.String java.lang.String.join(java.lang.CharSequence,java.lang.Iterable), public static java.lang.String java.lang.String.valueOf(boolean), public static java.lang.String java.lang.String.valueOf(char), public static java.lang.String java.lang.String.valueOf(char[]), public static java.lang.String java.lang.String.valueOf(char[],int,int), public static java.lang.String java.lang.String.valueOf(double), public static java.lang.String java.lang.String.valueOf(float), public static java.lang.String java.lang.String.valueOf(int), public static java.lang.String java.lang.String.valueOf(java.lang.Object), public static java.lang.String java.lang.String.valueOf(long), public void java.lang.String.getBytes(int,int,byte[],int), public void java.lang.String.getChars(int,int,char[],int), static int java.lang.String.indexOf(char[],int,int,char[],int,int,int), static int java.lang.String.indexOf(java.lang.String,java.lang.String,int), static int java.lang.String.lastIndexOf(char[],int,int,char[],int,int,int), static int java.lang.String.lastIndexOf(java.lang.String,java.lang.String,int), void java.lang.String.getChars(char[],int)]
+[native void java.lang.String.getCharsNoCheck(int,int,char[],int), private boolean java.lang.String.nonSyncContentEquals(java.lang.AbstractStringBuilder), private int java.lang.String.indexOfSupplementary(int,int), private int java.lang.String.lastIndexOfSupplementary(int,int), private native int java.lang.String.fastIndexOf(int,int), private native java.lang.String java.lang.String.doReplace(char,char), private native java.lang.String java.lang.String.fastSubstring(int,int), public boolean java.lang.String.contains(java.lang.CharSequence), public boolean java.lang.String.contentEquals(java.lang.CharSequence), public boolean java.lang.String.contentEquals(java.lang.StringBuffer), public boolean java.lang.String.endsWith(java.lang.String), public boolean java.lang.String.equals(java.lang.Object), public boolean java.lang.String.equalsIgnoreCase(java.lang.String), public boolean java.lang.String.isEmpty(), public boolean java.lang.String.matches(java.lang.String), public boolean java.lang.String.regionMatches(boolean,int,java.lang.String,int,int), public boolean java.lang.String.regionMatches(int,java.lang.String,int,int), public boolean java.lang.String.startsWith(java.lang.String), public boolean java.lang.String.startsWith(java.lang.String,int), public byte[] java.lang.String.getBytes(), public byte[] java.lang.String.getBytes(java.lang.String) throws java.io.UnsupportedEncodingException, public byte[] java.lang.String.getBytes(java.nio.charset.Charset), public int java.lang.String.codePointAt(int), public int java.lang.String.codePointBefore(int), public int java.lang.String.codePointCount(int,int), public int java.lang.String.compareTo(java.lang.Object), public int java.lang.String.compareToIgnoreCase(java.lang.String), public int java.lang.String.hashCode(), public int java.lang.String.indexOf(int), public int java.lang.String.indexOf(int,int), public int java.lang.String.indexOf(java.lang.String), public int java.lang.String.indexOf(java.lang.String,int), public int java.lang.String.lastIndexOf(int), public int java.lang.String.lastIndexOf(int,int), public int java.lang.String.lastIndexOf(java.lang.String), public int java.lang.String.lastIndexOf(java.lang.String,int), public int java.lang.String.length(), public int java.lang.String.offsetByCodePoints(int,int), public java.lang.CharSequence java.lang.String.subSequence(int,int), public java.lang.String java.lang.String.replace(char,char), public java.lang.String java.lang.String.replace(java.lang.CharSequence,java.lang.CharSequence), public java.lang.String java.lang.String.replaceAll(java.lang.String,java.lang.String), public java.lang.String java.lang.String.replaceFirst(java.lang.String,java.lang.String), public java.lang.String java.lang.String.substring(int), public java.lang.String java.lang.String.substring(int,int), public java.lang.String java.lang.String.toLowerCase(), public java.lang.String java.lang.String.toLowerCase(java.util.Locale), public java.lang.String java.lang.String.toString(), public java.lang.String java.lang.String.toUpperCase(), public java.lang.String java.lang.String.toUpperCase(java.util.Locale), public java.lang.String java.lang.String.trim(), public java.lang.String[] java.lang.String.split(java.lang.String), public java.lang.String[] java.lang.String.split(java.lang.String,int), public native char java.lang.String.charAt(int), public native char[] java.lang.String.toCharArray(), public native int java.lang.String.compareTo(java.lang.String), public native java.lang.String java.lang.String.concat(java.lang.String), public native java.lang.String java.lang.String.intern(), public static java.lang.String java.lang.String.copyValueOf(char[]), public static java.lang.String java.lang.String.copyValueOf(char[],int,int), public static java.lang.String java.lang.String.format(java.lang.String,java.lang.Object[]), public static java.lang.String java.lang.String.format(java.util.Locale,java.lang.String,java.lang.Object[]), public static java.lang.String java.lang.String.join(java.lang.CharSequence,java.lang.CharSequence[]), public static java.lang.String java.lang.String.join(java.lang.CharSequence,java.lang.Iterable), public static java.lang.String java.lang.String.valueOf(boolean), public static java.lang.String java.lang.String.valueOf(char), public static java.lang.String java.lang.String.valueOf(char[]), public static java.lang.String java.lang.String.valueOf(char[],int,int), public static java.lang.String java.lang.String.valueOf(double), public static java.lang.String java.lang.String.valueOf(float), public static java.lang.String java.lang.String.valueOf(int), public static java.lang.String java.lang.String.valueOf(java.lang.Object), public static java.lang.String java.lang.String.valueOf(long), public void java.lang.String.getBytes(int,int,byte[],int), public void java.lang.String.getChars(int,int,char[],int), static int java.lang.String.indexOf(char[],int,int,char[],int,int,int), static int java.lang.String.indexOf(java.lang.String,java.lang.String,int), static int java.lang.String.lastIndexOf(char[],int,int,char[],int,int,int), static int java.lang.String.lastIndexOf(java.lang.String,java.lang.String,int), void java.lang.String.getChars(char[],int)]
 []
 [interface java.io.Serializable, interface java.lang.Comparable, interface java.lang.CharSequence]
 0
diff --git a/test/950-redefine-intrinsic/expected.txt b/test/950-redefine-intrinsic/expected.txt
new file mode 100644
index 0000000..1264c94
--- /dev/null
+++ b/test/950-redefine-intrinsic/expected.txt
@@ -0,0 +1 @@
+Finished!
diff --git a/test/950-redefine-intrinsic/info.txt b/test/950-redefine-intrinsic/info.txt
new file mode 100644
index 0000000..c19d2b4
--- /dev/null
+++ b/test/950-redefine-intrinsic/info.txt
@@ -0,0 +1,3 @@
+Tests basic functions in the jvmti plugin.
+
+Tests that we are able to redefine intrinsic functions.
diff --git a/test/950-redefine-intrinsic/run b/test/950-redefine-intrinsic/run
new file mode 100755
index 0000000..e92b873
--- /dev/null
+++ b/test/950-redefine-intrinsic/run
@@ -0,0 +1,17 @@
+#!/bin/bash
+#
+# Copyright 2017 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.
+
+./default-run "$@" --jvmti
diff --git a/test/950-redefine-intrinsic/src/Main.java b/test/950-redefine-intrinsic/src/Main.java
new file mode 100644
index 0000000..30cd3ab
--- /dev/null
+++ b/test/950-redefine-intrinsic/src/Main.java
@@ -0,0 +1,471 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+
+import java.util.Base64;
+import java.util.Random;
+import java.util.function.*;
+import java.util.stream.*;
+
+public class Main {
+
+  // The bytes below define the following java program.
+  // package java.lang;
+  // import java.math.*;
+  // public final class Long extends Number implements Comparable<Long> {
+  //     public static final long MIN_VALUE = 0;
+  //     public static final long MAX_VALUE = 0;
+  //     public static final Class<Long> TYPE = null;
+  //     static { }
+  //     // Used for Stream.count for some reason.
+  //     public static long sum(long a, long b) {
+  //       return a + b;
+  //     }
+  //     // Used in stream/lambda functions.
+  //     public Long(long value) {
+  //       this.value = value;
+  //     }
+  //     // Used in stream/lambda functions.
+  //     public static Long valueOf(long l) {
+  //       return new Long(l);
+  //     }
+  //     // Intrinsic! Do something cool. Return i + 1
+  //     public static long highestOneBit(long i) {
+  //       return i + 1;
+  //     }
+  //     // Intrinsic! Do something cool. Return i - 1
+  //     public static long lowestOneBit(long i) {
+  //       return i - 1;
+  //     }
+  //     // Intrinsic! Do something cool. Return i + i
+  //     public static int numberOfLeadingZeros(long i) {
+  //       return (int)(i + i);
+  //     }
+  //     // Intrinsic! Do something cool. Return i & (i >>> 1);
+  //     public static int numberOfTrailingZeros(long i) {
+  //       return (int)(i & (i >>> 1));
+  //     }
+  //     // Intrinsic! Do something cool. Return 5
+  //      public static int bitCount(long i) {
+  //        return 5;
+  //      }
+  //     // Intrinsic! Do something cool. Return i
+  //     public static long rotateLeft(long i, int distance) {
+  //       return i;
+  //     }
+  //     // Intrinsic! Do something cool. Return 10 * i
+  //     public static long rotateRight(long i, int distance) {
+  //       return 10 * i;
+  //     }
+  //     // Intrinsic! Do something cool. Return -i
+  //     public static long reverse(long i) {
+  //       return -i;
+  //     }
+  //     // Intrinsic! Do something cool. Return 0
+  //     public static int signum(long i) {
+  //       return 0;
+  //     }
+  //     // Intrinsic! Do something cool. Return 0
+  //     public static long reverseBytes(long i) {
+  //       return 0;
+  //     }
+  //     public String toString() {
+  //       return "Redefined Long! value (as double)=" + ((double)value);
+  //     }
+  //     public static String toString(long i, int radix) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static String toUnsignedString(long i, int radix) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     private static BigInteger toUnsignedBigInteger(long i) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static String toHexString(long i) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static String toOctalString(long i) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static String toBinaryString(long i) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     static String toUnsignedString0(long val, int shift) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     static int formatUnsignedLong(long val, int shift, char[] buf, int offset, int len) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static String toString(long i) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static String toUnsignedString(long i) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     static void getChars(long i, int index, char[] buf) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     static int stringSize(long x) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static long parseLong(String s, int radix) throws NumberFormatException {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static long parseLong(String s) throws NumberFormatException {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static long parseUnsignedLong(String s, int radix) throws NumberFormatException {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static long parseUnsignedLong(String s) throws NumberFormatException {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static Long valueOf(String s, int radix) throws NumberFormatException {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static Long valueOf(String s) throws NumberFormatException {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static Long decode(String nm) throws NumberFormatException {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     private final long value;
+  //     public Long(String s) throws NumberFormatException {
+  //       this(0);
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public byte byteValue() {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public short shortValue() {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public int intValue() {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public long longValue() {
+  //       return value;
+  //     }
+  //     public float floatValue() {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public double doubleValue() {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public int hashCode() {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static int hashCode(long value) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public boolean equals(Object obj) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static Long getLong(String nm) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static Long getLong(String nm, long val) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static Long getLong(String nm, Long val) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public int compareTo(Long anotherLong) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static int compare(long x, long y) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static int compareUnsigned(long x, long y) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static long divideUnsigned(long dividend, long divisor) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static long remainderUnsigned(long dividend, long divisor) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static final int SIZE = 64;
+  //     public static final int BYTES = SIZE / Byte.SIZE;
+  //     public static long max(long a, long b) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     public static long min(long a, long b) {
+  //       throw new Error("Method redefined away!");
+  //     }
+  //     private static final long serialVersionUID = 0;
+  // }
+  private static final byte[] CLASS_BYTES = Base64.getDecoder().decode(
+    "yv66vgAAADQAiQUAAAAAAAAACgcAdQoAAwB2CAB3CgADAHgJAA0AeQoAAwB6CgADAHsHAHwIAH0K" +
+    "AAoAfgcAfwoADQCACgASAHYKAA0AgQkADQCCBwCDBwCEAQAJTUlOX1ZBTFVFAQABSgEADUNvbnN0" +
+    "YW50VmFsdWUFAAAAAAAAAAABAAlNQVhfVkFMVUUBAARUWVBFAQARTGphdmEvbGFuZy9DbGFzczsB" +
+    "AAlTaWduYXR1cmUBACNMamF2YS9sYW5nL0NsYXNzPExqYXZhL2xhbmcvTG9uZzs+OwEABXZhbHVl" +
+    "AQAEU0laRQEAAUkDAAAAQAEABUJZVEVTAwAAAAgBABBzZXJpYWxWZXJzaW9uVUlEAQANaGlnaGVz" +
+    "dE9uZUJpdAEABChKKUoBAARDb2RlAQAPTGluZU51bWJlclRhYmxlAQAMbG93ZXN0T25lQml0AQAU" +
+    "bnVtYmVyT2ZMZWFkaW5nWmVyb3MBAAQoSilJAQAVbnVtYmVyT2ZUcmFpbGluZ1plcm9zAQAIYml0" +
+    "Q291bnQBAApyb3RhdGVMZWZ0AQAFKEpJKUoBAAtyb3RhdGVSaWdodAEAB3JldmVyc2UBAAZzaWdu" +
+    "dW0BAAxyZXZlcnNlQnl0ZXMBAAh0b1N0cmluZwEAFCgpTGphdmEvbGFuZy9TdHJpbmc7AQAWKEpJ" +
+    "KUxqYXZhL2xhbmcvU3RyaW5nOwEAEHRvVW5zaWduZWRTdHJpbmcBABR0b1Vuc2lnbmVkQmlnSW50" +
+    "ZWdlcgEAGShKKUxqYXZhL21hdGgvQmlnSW50ZWdlcjsBAAt0b0hleFN0cmluZwEAFShKKUxqYXZh" +
+    "L2xhbmcvU3RyaW5nOwEADXRvT2N0YWxTdHJpbmcBAA50b0JpbmFyeVN0cmluZwEAEXRvVW5zaWdu" +
+    "ZWRTdHJpbmcwAQASZm9ybWF0VW5zaWduZWRMb25nAQAJKEpJW0NJSSlJAQAIZ2V0Q2hhcnMBAAco" +
+    "SklbQylWAQAKc3RyaW5nU2l6ZQEACXBhcnNlTG9uZwEAFihMamF2YS9sYW5nL1N0cmluZztJKUoB" +
+    "AApFeGNlcHRpb25zBwCFAQAVKExqYXZhL2xhbmcvU3RyaW5nOylKAQARcGFyc2VVbnNpZ25lZExv" +
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+    "AAZkZWNvZGUBAAY8aW5pdD4BAAQoSilWAQAVKExqYXZhL2xhbmcvU3RyaW5nOylWAQAJYnl0ZVZh" +
+    "bHVlAQADKClCAQAKc2hvcnRWYWx1ZQEAAygpUwEACGludFZhbHVlAQADKClJAQAJbG9uZ1ZhbHVl" +
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+    "AAZlcXVhbHMBABUoTGphdmEvbGFuZy9PYmplY3Q7KVoBAAdnZXRMb25nAQAlKExqYXZhL2xhbmcv" +
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+    "L0xvbmc7KUxqYXZhL2xhbmcvTG9uZzsBAAljb21wYXJlVG8BABMoTGphdmEvbGFuZy9Mb25nOylJ" +
+    "AQAHY29tcGFyZQEABShKSilJAQAPY29tcGFyZVVuc2lnbmVkAQAOZGl2aWRlVW5zaWduZWQBAAUo" +
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+    "dmEvbGFuZy9OdW1iZXIBABRqYXZhL2xhbmcvQ29tcGFyYWJsZQEAH2phdmEvbGFuZy9OdW1iZXJG" +
+    "b3JtYXRFeGNlcHRpb24BAAZhcHBlbmQBAC0oTGphdmEvbGFuZy9TdHJpbmc7KUxqYXZhL2xhbmcv" +
+    "U3RyaW5nQnVpbGRlcjsBABwoRClMamF2YS9sYW5nL1N0cmluZ0J1aWxkZXI7ADEADQASAAEAEwAH" +
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+    "ACcAAAAcAAQAAgAAAAQeCmGtAAAAAQAoAAAABgABAAAADgAJACkAJgABACcAAAAcAAQAAgAAAAQe" +
+    "CmWtAAAAAQAoAAAABgABAAAAEwAJACoAKwABACcAAAAdAAQAAgAAAAUeHmGIrAAAAAEAKAAAAAYA" +
+    "AQAAABgACQAsACsAAQAnAAAAHwAFAAIAAAAHHh4EfX+IrAAAAAEAKAAAAAYAAQAAAB0ACQAtACsA" +
+    "AQAnAAAAGgABAAIAAAACCKwAAAABACgAAAAGAAEAAAAiAAkALgAvAAEAJwAAABoAAgADAAAAAh6t" +
+    "AAAAAQAoAAAABgABAAAAJwAJADAALwABACcAAAAeAAQAAwAAAAYUAAEeaa0AAAABACgAAAAGAAEA" +
+    "AAAsAAkAMQAmAAEAJwAAABsAAgACAAAAAx51rQAAAAEAKAAAAAYAAQAAADEACQAyACsAAQAnAAAA" +
+    "GgABAAIAAAACA6wAAAABACgAAAAGAAEAAAA2AAkAMwAmAAEAJwAAABoAAgACAAAAAgmtAAAAAQAo" +
+    "AAAABgABAAAAOwABADQANQABACcAAAAwAAMAAQAAABi7AANZtwAEEgW2AAYqtAAHirYACLYACbAA" +
+    "AAABACgAAAAGAAEAAAA/AAkANAA2AAEAJwAAACIAAwADAAAACrsAClkSC7cADL8AAAABACgAAAAG" +
+    "AAEAAABDAAkANwA2AAEAJwAAACIAAwADAAAACrsAClkSC7cADL8AAAABACgAAAAGAAEAAABGAAoA" +
+    "OAA5AAEAJwAAACIAAwACAAAACrsAClkSC7cADL8AAAABACgAAAAGAAEAAABKAAkAOgA7AAEAJwAA" +
+    "ACIAAwACAAAACrsAClkSC7cADL8AAAABACgAAAAGAAEAAABNAAkAPAA7AAEAJwAAACIAAwACAAAA" +
+    "CrsAClkSC7cADL8AAAABACgAAAAGAAEAAABRAAkAPQA7AAEAJwAAACIAAwACAAAACrsAClkSC7cA" +
+    "DL8AAAABACgAAAAGAAEAAABVAAgAPgA2AAEAJwAAACIAAwADAAAACrsAClkSC7cADL8AAAABACgA" +
+    "AAAGAAEAAABZAAgAPwBAAAEAJwAAACIAAwAGAAAACrsAClkSC7cADL8AAAABACgAAAAGAAEAAABd" +
+    "AAkANAA7AAEAJwAAACIAAwACAAAACrsAClkSC7cADL8AAAABACgAAAAGAAEAAABhAAkANwA7AAEA" +
+    "JwAAACIAAwACAAAACrsAClkSC7cADL8AAAABACgAAAAGAAEAAABlAAgAQQBCAAEAJwAAACIAAwAE" +
+    "AAAACrsAClkSC7cADL8AAAABACgAAAAGAAEAAABpAAgAQwArAAEAJwAAACIAAwACAAAACrsAClkS" +
+    "C7cADL8AAAABACgAAAAGAAEAAABtAAkARABFAAIAJwAAACIAAwACAAAACrsAClkSC7cADL8AAAAB" +
+    "ACgAAAAGAAEAAABxAEYAAAAEAAEARwAJAEQASAACACcAAAAiAAMAAQAAAAq7AApZEgu3AAy/AAAA" +
+    "AQAoAAAABgABAAAAdQBGAAAABAABAEcACQBJAEUAAgAnAAAAIgADAAIAAAAKuwAKWRILtwAMvwAA" +
+    "AAEAKAAAAAYAAQAAAHkARgAAAAQAAQBHAAkASQBIAAIAJwAAACIAAwABAAAACrsAClkSC7cADL8A" +
+    "AAABACgAAAAGAAEAAAB9AEYAAAAEAAEARwAJAEoASwACACcAAAAiAAMAAgAAAAq7AApZEgu3AAy/" +
+    "AAAAAQAoAAAABgABAAAAgQBGAAAABAABAEcACQBKAEwAAgAnAAAAIgADAAEAAAAKuwAKWRILtwAM" +
+    "vwAAAAEAKAAAAAYAAQAAAIQARgAAAAQAAQBHAAkASgBNAAEAJwAAACEABAACAAAACbsADVketwAO" +
+    "sAAAAAEAKAAAAAYAAQAAAIcACQBOAEwAAgAnAAAAIgADAAEAAAAKuwAKWRILtwAMvwAAAAEAKAAA" +
+    "AAYAAQAAAIsARgAAAAQAAQBHAAEATwBQAAEAJwAAACoAAwADAAAACiq3AA8qH7UAB7EAAAABACgA" +
+    "AAAOAAMAAACQAAQAkQAJAJIAAQBPAFEAAgAnAAAAKwADAAIAAAAPKgm3AA67AApZEgu3AAy/AAAA" +
+    "AQAoAAAACgACAAAAlQAFAJYARgAAAAQAAQBHAAEAUgBTAAEAJwAAACIAAwABAAAACrsAClkSC7cA" +
+    "DL8AAAABACgAAAAGAAEAAACaAAEAVABVAAEAJwAAACIAAwABAAAACrsAClkSC7cADL8AAAABACgA" +
+    "AAAGAAEAAACeAAEAVgBXAAEAJwAAACIAAwABAAAACrsAClkSC7cADL8AAAABACgAAAAGAAEAAACi" +
+    "AAEAWABZAAEAJwAAAB0AAgABAAAABSq0AAetAAAAAQAoAAAABgABAAAApgABAFoAWwABACcAAAAi" +
+    "AAMAAQAAAAq7AApZEgu3AAy/AAAAAQAoAAAABgABAAAAqgABAFwAXQABACcAAAAiAAMAAQAAAAq7" +
+    "AApZEgu3AAy/AAAAAQAoAAAABgABAAAArgABAF4AVwABACcAAAAiAAMAAQAAAAq7AApZEgu3AAy/" +
+    "AAAAAQAoAAAABgABAAAAsgAJAF4AKwABACcAAAAiAAMAAgAAAAq7AApZEgu3AAy/AAAAAQAoAAAA" +
+    "BgABAAAAtgABAF8AYAABACcAAAAiAAMAAgAAAAq7AApZEgu3AAy/AAAAAQAoAAAABgABAAAAugAJ" +
+    "AGEATAABACcAAAAiAAMAAQAAAAq7AApZEgu3AAy/AAAAAQAoAAAABgABAAAAvgAJAGEAYgABACcA" +
+    "AAAiAAMAAwAAAAq7AApZEgu3AAy/AAAAAQAoAAAABgABAAAAwgAJAGEAYwABACcAAAAiAAMAAgAA" +
+    "AAq7AApZEgu3AAy/AAAAAQAoAAAABgABAAAAxgABAGQAZQABACcAAAAiAAMAAgAAAAq7AApZEgu3" +
+    "AAy/AAAAAQAoAAAABgABAAAAyQAJAGYAZwABACcAAAAiAAMABAAAAAq7AApZEgu3AAy/AAAAAQAo" +
+    "AAAABgABAAAAzQAJAGgAZwABACcAAAAiAAMABAAAAAq7AApZEgu3AAy/AAAAAQAoAAAABgABAAAA" +
+    "0QAJAGkAagABACcAAAAiAAMABAAAAAq7AApZEgu3AAy/AAAAAQAoAAAABgABAAAA1QAJAGsAagAB" +
+    "ACcAAAAiAAMABAAAAAq7AApZEgu3AAy/AAAAAQAoAAAABgABAAAA2QAJAGwAagABACcAAAAcAAQA" +
+    "BAAAAAQeIGGtAAAAAQAoAAAABgABAAAA4AAJAG0AagABACcAAAAiAAMABAAAAAq7AApZEgu3AAy/" +
+    "AAAAAQAoAAAABgABAAAA5AAJAG4AagABACcAAAAiAAMABAAAAAq7AApZEgu3AAy/AAAAAQAoAAAA" +
+    "BgABAAAA5xBBAGQAbwABACcAAAAhAAIAAgAAAAkqK8AADbYAEKwAAAABACgAAAAGAAEAAAAFAAgA" +
+    "cABxAAEAJwAAACEAAQAAAAAABQGzABGxAAAAAQAoAAAACgACAAAACAAEAAoAAgAcAAAAAgByAHMA" +
+    "AAACAHQ=");
+  private static final byte[] DEX_BYTES = Base64.getDecoder().decode(
+    "ZGV4CjAzNQAFtMupmeDN6Ck5nxdemGsp43KmLNpYLrMYFgAAcAAAAHhWNBIAAAAAAAAAAEgVAABl" +
+    "AAAAcAAAABUAAAAEAgAAIAAAAFgCAAAHAAAA2AMAAD0AAAAQBAAAAQAAAPgFAAAAEAAAGAYAAB4O" +
+    "AAAhDgAAKw4AADMOAAA3DgAAOg4AAEEOAABEDgAARw4AAEoOAABODgAAVg4AAFsOAABfDgAAYg4A" +
+    "AGYOAABrDgAAcA4AAHQOAAB5DgAAfA4AAIAOAACEDgAAiQ4AAI0OAACSDgAAlw4AAJwOAAC7DgAA" +
+    "1w4AAOkOAAD8DgAAEw8AACsPAAA+DwAAUA8AAGQPAACHDwAAmw8AAK8PAADKDwAA4g8AAO0PAAD4" +
+    "DwAAAxAAABsQAAA/EAAAQhAAAEgQAABOEAAAURAAAFUQAABbEAAAXxAAAGIQAABmEAAAahAAAHIQ" +
+    "AAB8EAAAhxAAAJAQAACbEAAArBAAALQQAADEEAAA0RAAAOUQAADtEAAA+RAAAA0RAAAXEQAAIBEA" +
+    "ACoRAAA5EQAAQxEAAE4RAABcEQAAYREAAGYRAAB8EQAAkxEAAJ4RAACxEQAAxBEAAM0RAADbEQAA" +
+    "5xEAAPQRAAAGEgAAEhIAABoSAAAmEgAAKxIAADsSAABIEgAAVxIAAGESAAB3EgAAiRIAAJwSAACj" +
+    "EgAABAAAAAYAAAAHAAAACAAAAA0AAAAbAAAAHAAAAB4AAAAgAAAAIQAAACIAAAAjAAAAJAAAACUA" +
+    "AAAmAAAAJwAAACgAAAAuAAAAMQAAADUAAAA3AAAABAAAAAAAAAAAAAAABgAAAAEAAAAAAAAABwAA" +
+    "AAIAAAAAAAAACAAAAAMAAAAAAAAACQAAAAMAAAC0DQAACgAAAAMAAAC8DQAACwAAAAMAAADMDQAA" +
+    "DAAAAAMAAADUDQAADAAAAAMAAADcDQAADQAAAAQAAAAAAAAADgAAAAQAAAC0DQAADwAAAAQAAADk" +
+    "DQAAEAAAAAQAAADMDQAAEQAAAAQAAADsDQAAEgAAAAQAAAD0DQAAFQAAAAoAAAC0DQAAFwAAAAoA" +
+    "AADsDQAAGAAAAAoAAAD0DQAAGQAAAAoAAAD8DQAAGgAAAAoAAAAEDgAAEwAAAA4AAAAAAAAAFQAA" +
+    "AA4AAAC0DQAAFgAAAA4AAADkDQAAFAAAAA8AAAAMDgAAFwAAAA8AAADsDQAAFQAAABAAAAC0DQAA" +
+    "LgAAABEAAAAAAAAAMQAAABIAAAAAAAAAMgAAABIAAAC0DQAAMwAAABIAAAAUDgAANAAAABIAAADs" +
+    "DQAANgAAABMAAADcDQAACgADAAUAAAAKAAQAKgAAAAoABAArAAAACgADAC8AAAAKAAcAMAAAAAoA" +
+    "BABXAAAACgAEAGMAAAAJAB4AAgAAAAoAGwABAAAACgAcAAIAAAAKAB4AAgAAAAoABAA5AAAACgAA" +
+    "ADoAAAAKAAYAOwAAAAoABwA8AAAACgAIADwAAAAKAAYAPQAAAAoAEAA+AAAACgAMAD8AAAAKAAEA" +
+    "QAAAAAoAHwBCAAAACgACAEMAAAAKAAUARAAAAAoAHQBFAAAACgAQAEYAAAAKABIARgAAAAoAEwBG" +
+    "AAAACgADAEcAAAAKAAQARwAAAAoACgBIAAAACgADAEkAAAAKAAkASgAAAAoACgBLAAAACgAMAEwA" +
+    "AAAKAAwATQAAAAoABABOAAAACgAEAE8AAAAKAA0AUAAAAAoADgBQAAAACgANAFEAAAAKAA4AUQAA" +
+    "AAoADABSAAAACgAKAFMAAAAKAAoAVAAAAAoACwBVAAAACgALAFYAAAAKABoAWAAAAAoABABZAAAA" +
+    "CgAEAFoAAAAKAAwAWwAAAAoAFQBcAAAACgAVAF0AAAAKABUAXgAAAAoAFABfAAAACgAVAF8AAAAK" +
+    "ABYAXwAAAAoAGQBgAAAACgAVAGEAAAAKABYAYQAAAAoAFgBiAAAACgAPAGQAAAAKABAAZAAAAAoA" +
+    "EQBkAAAACwAbAAIAAAAPABsAAgAAAA8AFwA4AAAADwAYADgAAAAPABQAXwAAAAoAAAARAAAACwAA" +
+    "AKwNAAApAAAAVA0AAFEUAABIFAAAAQAAACIUAAABAAAAMhQAAAEAAABAFAAAAAAAAAAAAACsEgAA" +
+    "AQAAAA4AAAAEAAMAAQAAALESAAAGAAAAcBA4AAEAWhIGAA4ABAACAAMAAAC6EgAADgAAABYAAABw" +
+    "MAIAAgEiAAkAGwEsAAAAcCAAABAAJwADAAIAAAAAAMISAAACAAAAElAPAAYABAACAAAAyBIAAAkA" +
+    "AAAiAAkAGwEsAAAAcCAAABAAJwAAAAYABAACAAAA0BIAAAkAAAAiAAkAGwEsAAAAcCAAABAAJwAA" +
+    "AAMAAQACAAAA2BIAAAkAAAAiAAkAGwEsAAAAcCAAABAAJwAAAAYABAACAAAA3xIAAAkAAAAiAAkA" +
+    "GwEsAAAAcCAAABAAJwAAAAgABgACAAAA5xIAAAkAAAAiAAkAGwEsAAAAcCAAABAAJwAAAAYABAAC" +
+    "AAAA8RIAAAkAAAAiAAkAGwEsAAAAcCAAABAAJwAAAAMAAQACAAAA+RIAAAkAAAAiAAkAGwEsAAAA" +
+    "cCAAABAAJwAAAAUAAwACAAAAABMAAAkAAAAiAAkAGwEsAAAAcCAAABAAJwAAAAQAAgACAAAACBMA" +
+    "AAkAAAAiAAkAGwEsAAAAcCAAABAAJwAAAAQAAgACAAAAEBMAAAkAAAAiAAkAGwEsAAAAcCAAABAA" +
+    "JwAAAAQAAgAAAAAAFxMAAAQAAAAWAAEAuyAQAAQAAgAAAAAAHRMAAAUAAAAWAAEAnAACABAAAAAG" +
+    "AAQAAgAAACMTAAAJAAAAIgAJABsBLAAAAHAgAAAQACcAAAAGAAQAAgAAACsTAAAJAAAAIgAJABsB" +
+    "LAAAAHAgAAAQACcAAAAEAAIAAAAAADMTAAAEAAAAmwACAoQADwAEAAIAAAAAADkTAAAGAAAAEhCl" +
+    "AAIAwCCEAA8AAwABAAIAAAA/EwAACQAAACIACQAbASwAAABwIAAAEAAnAAAABAACAAIAAABFEwAA" +
+    "CQAAACIACQAbASwAAABwIAAAEAAnAAAAAwABAAIAAABMEwAACQAAACIACQAbASwAAABwIAAAEAAn" +
+    "AAAABAACAAIAAABSEwAACQAAACIACQAbASwAAABwIAAAEAAnAAAABgAEAAIAAABZEwAACQAAACIA" +
+    "CQAbASwAAABwIAAAEAAnAAAABAACAAAAAABhEwAAAgAAAH0gEAAEAAIAAAAAAGcTAAADAAAAFgAA" +
+    "ABAAAAADAAMAAAAAAG0TAAABAAAAEAAAAAUAAwAAAAAAdBMAAAQAAAAWAAoAvSAQAAMAAgAAAAAA" +
+    "exMAAAIAAAASAA8ABAACAAIAAACBEwAACQAAACIACQAbASwAAABwIAAAEAAnAAAABgAEAAAAAACH" +
+    "EwAAAwAAAJsAAgQQAAAABAACAAIAAACPEwAACQAAACIACQAbASwAAABwIAAAEAAnAAAABAACAAIA" +
+    "AACVEwAACQAAACIACQAbASwAAABwIAAAEAAnAAAABAACAAIAAACbEwAACQAAACIACQAbASwAAABw" +
+    "IAAAEAAnAAAABAACAAIAAAChEwAACQAAACIACQAbASwAAABwIAAAEAAnAAAABQADAAIAAACnEwAA" +
+    "CQAAACIACQAbASwAAABwIAAAEAAnAAAABAACAAIAAACuEwAACQAAACIACQAbASwAAABwIAAAEAAn" +
+    "AAAABAACAAIAAAC0EwAACQAAACIACQAbASwAAABwIAAAEAAnAAAABQADAAIAAAC6EwAACQAAACIA" +
+    "CQAbASwAAABwIAAAEAAnAAAABQADAAIAAADBEwAACQAAACIACQAbASwAAABwIAAAEAAnAAAABAAC" +
+    "AAMAAADIEwAABgAAACIACgBwMAIAIAMRAAMAAQACAAAAzxMAAAkAAAAiAAkAGwEsAAAAcCAAABAA" +
+    "JwAAAAQAAgACAAAA1hMAAAkAAAAiAAkAGwEsAAAAcCAAABAAJwAAAAMAAQACAAAA3hMAAAkAAAAi" +
+    "AAkAGwEsAAAAcCAAABAAJwAAAAQAAgACAAAA5BMAAAkAAAAiAAkAGwEsAAAAcCAAABAAJwAAAAMA" +
+    "AgACAAAA6xMAAAcAAAAfAgoAbiAHACEACgAPAAAAAwABAAIAAADyEwAACQAAACIACQAbASwAAABw" +
+    "IAAAEAAnAAAABAACAAIAAAD4EwAACQAAACIACQAbASwAAABwIAAAEAAnAAAAAwABAAIAAAD/EwAA" +
+    "CQAAACIACQAbASwAAABwIAAAEAAnAAAAAwABAAIAAAAFFAAACQAAACIACQAbASwAAABwIAAAEAAn" +
+    "AAAAAwABAAIAAAALFAAACQAAACIACQAbASwAAABwIAAAEAAnAAAAAwABAAAAAAARFAAAAwAAAFMg" +
+    "BgAQAAAAAwABAAIAAAAXFAAACQAAACIACQAbASwAAABwIAAAEAAnAAAABQABAAMAAAAdFAAAGAAA" +
+    "ACIADwBwEDkAAAAbAS0AAABuIDsAEAAMAFNCBgCGIm4wOgAgAwwAbhA8AAAADAARABgGAAABAAAA" +
+    "CAAAAAAAAAAEAAAAIAYAAAMAAAAoBgAACgAAACgGAAAeAAAAKAYAAB8AAAAoBgAAIAAAACgGAAAh" +
+    "AAAAKAYAADYAAAAoBgAANwAAACgGAAABAAAACAAAAAEAAAAEAAAABQAAAAQAAwAUAAMAAwAAAAIA" +
+    "AAAEAAQAAQAAAAoAAAABAAAADQAAAAIAAAAEAAMAAQAAAA4AAAACAAAADgADAAIAAAAOAAQAAgAA" +
+    "AA4ACgABAAAAAQAAAAMAAAAEAAMAFAABPAAIPGNsaW5pdD4ABjxpbml0PgACPjsAAUIABUJZVEVT" +
+    "AAFEAAFGAAFJAAJJSgAGSUpJTElJAANJSkoAAklMAAFKAAJKSgADSkpJAANKSkoAAkpMAANKTEkA" +
+    "AUwAAkxEAAJMSgADTEpJAAJMTAADTExJAANMTEoAA0xMTAAdTGRhbHZpay9hbm5vdGF0aW9uL1Np" +
+    "Z25hdHVyZTsAGkxkYWx2aWsvYW5ub3RhdGlvbi9UaHJvd3M7ABBMamF2YS9sYW5nL0NsYXNzABFM" +
+    "amF2YS9sYW5nL0NsYXNzOwAVTGphdmEvbGFuZy9Db21wYXJhYmxlABZMamF2YS9sYW5nL0NvbXBh" +
+    "cmFibGU7ABFMamF2YS9sYW5nL0Vycm9yOwAQTGphdmEvbGFuZy9Mb25nOwASTGphdmEvbGFuZy9O" +
+    "dW1iZXI7ACFMamF2YS9sYW5nL051bWJlckZvcm1hdEV4Y2VwdGlvbjsAEkxqYXZhL2xhbmcvT2Jq" +
+    "ZWN0OwASTGphdmEvbGFuZy9TdHJpbmc7ABlMamF2YS9sYW5nL1N0cmluZ0J1aWxkZXI7ABZMamF2" +
+    "YS9tYXRoL0JpZ0ludGVnZXI7AAlMb25nLmphdmEACU1BWF9WQUxVRQAJTUlOX1ZBTFVFABZNZXRo" +
+    "b2QgcmVkZWZpbmVkIGF3YXkhACJSZWRlZmluZWQgTG9uZyEgdmFsdWUgKGFzIGRvdWJsZSk9AAFT" +
+    "AARTSVpFAARUWVBFAAFWAAJWSgAEVkpJTAACVkwAAVoAAlpMAAJbQwAGYXBwZW5kAAhiaXRDb3Vu" +
+    "dAAJYnl0ZVZhbHVlAAdjb21wYXJlAAljb21wYXJlVG8AD2NvbXBhcmVVbnNpZ25lZAAGZGVjb2Rl" +
+    "AA5kaXZpZGVVbnNpZ25lZAALZG91YmxlVmFsdWUAEmVtaXR0ZXI6IGphY2stNC4yNQAGZXF1YWxz" +
+    "AApmbG9hdFZhbHVlABJmb3JtYXRVbnNpZ25lZExvbmcACGdldENoYXJzAAdnZXRMb25nAAhoYXNo" +
+    "Q29kZQANaGlnaGVzdE9uZUJpdAAIaW50VmFsdWUACWxvbmdWYWx1ZQAMbG93ZXN0T25lQml0AANt" +
+    "YXgAA21pbgAUbnVtYmVyT2ZMZWFkaW5nWmVyb3MAFW51bWJlck9mVHJhaWxpbmdaZXJvcwAJcGFy" +
+    "c2VMb25nABFwYXJzZVVuc2lnbmVkTG9uZwARcmVtYWluZGVyVW5zaWduZWQAB3JldmVyc2UADHJl" +
+    "dmVyc2VCeXRlcwAKcm90YXRlTGVmdAALcm90YXRlUmlnaHQAEHNlcmlhbFZlcnNpb25VSUQACnNo" +
+    "b3J0VmFsdWUABnNpZ251bQAKc3RyaW5nU2l6ZQADc3VtAA50b0JpbmFyeVN0cmluZwALdG9IZXhT" +
+    "dHJpbmcADXRvT2N0YWxTdHJpbmcACHRvU3RyaW5nABR0b1Vuc2lnbmVkQmlnSW50ZWdlcgAQdG9V" +
+    "bnNpZ25lZFN0cmluZwARdG9VbnNpZ25lZFN0cmluZzAABXZhbHVlAAd2YWx1ZU9mAAUABw4AkAEB" +
+    "AAcOPC0AlQEBAAcOWgAiAQAHDgDNAQIAAAcOANEBAgAABw4AiwEBAAcOANUBAgAABw4AXQUAAAAA" +
+    "AAcOAGkDAAAABw4AvgEBAAcOAMIBAgAABw4AxgECAAAHDgC2AQEABw4ADgEABw4AEwEABw4A5AEC" +
+    "AAAHDgDnAQIAAAcOABgBAAcOAB0BAAcOAHUBAAcOAHECAAAHDgB9AQAHDgB5AgAABw4A2QECAAAH" +
+    "DgAxAQAHDgA7AQAHDgAnAgAABw4ALAIAAAcOADYBAAcOAG0BAAcOAOABAgAABw4AVQEABw4ATQEA" +
+    "Bw4AUQEABw4AYQEABw4AQwIAAAcOAEoBAAcOAGUBAAcOAEYCAAAHDgBZAgAABw4AhwEBAAcOAIQB" +
+    "AQAHDgCBAQIAAAcOAJoBAAcOAMkBAQAHDgDIAQEABw4ArgEABw4AugEBAAcOAKoBAAcOALIBAAcO" +
+    "AKIBAAcOAKYBAAcOAJ4BAAcOAD8ABw4AAgUBYxwFFyMXHxcAFyIXAwIFAWMcBBcdFwAXIhcDAgYB" +
+    "YxwBGAwEBAgGAAYABEAGASwLABkBGQEZARkBGQEaBhIBiIAEsAwBgYAExAwBgYAE4AwBCYwNAgmg" +
+    "DQMJxA0BCegNAQmMDgQIsA4BCNQOAQn4DgEJnA8BCcAPAgnkDwEJiBADCaAQAQm8EAEJ4BABCYQR" +
+    "AQmcEQEJuBEBCdwRAQmAEgEJpBIBCcgSAQnsEgEJgBMBCZgTAQmsEwIJxBMBCNgTAQn8EwEJlBQB" +
+    "CbgUAQncFAIJgBUBCaQVAQrIFQEJ7BUBCZAWAQi0FgEJ2BYBCfQWAQmYFwUBvBcCAeAXAcEghBgE" +
+    "AaQYAQHIGAEB7BgGAZAZAwG0GQEB2BkPAfAZBwGUGgAAEQAAAAAAAAABAAAAAAAAAAEAAABlAAAA" +
+    "cAAAAAIAAAAVAAAABAIAAAMAAAAgAAAAWAIAAAQAAAAHAAAA2AMAAAUAAAA9AAAAEAQAAAYAAAAB" +
+    "AAAA+AUAAAMQAAADAAAAGAYAAAEgAAA3AAAAMAYAAAYgAAABAAAAVA0AAAEQAAANAAAArA0AAAIg" +
+    "AABlAAAAHg4AAAMgAAA3AAAArBIAAAQgAAADAAAAIhQAAAUgAAABAAAASBQAAAAgAAABAAAAURQA" +
+    "AAAQAAABAAAASBUAAA==");
+
+  static class FuncCmp implements LongPredicate {
+    final String name;
+    final LongPredicate p;
+    public FuncCmp(String name, LongPredicate p) {
+      this.name = name;
+      this.p = p;
+    }
+
+    public boolean test(long l) {
+      return p.test(l);
+    }
+  }
+  static FuncCmp l2l(String name, final LongUnaryOperator a, final LongUnaryOperator b) {
+    return new FuncCmp(name, (v) -> a.applyAsLong(v) == b.applyAsLong(v));
+  }
+  static FuncCmp l2i(String name, final LongToIntFunction a, final LongToIntFunction b) {
+    return new FuncCmp(name, (v) -> a.applyAsInt(v) == b.applyAsInt(v));
+  }
+
+  /** Interface for a long, int -> long function. */
+  static interface LI2IFunction { public long applyToLongInt(long a, int b); }
+
+  static FuncCmp li2l(String name, final Random r, final LI2IFunction a, final LI2IFunction b) {
+    return new FuncCmp(name, new LongPredicate() {
+      public boolean test(long v) {
+        int i = r.nextInt();
+        return a.applyToLongInt(v, i) == b.applyToLongInt(v, i);
+      }
+    });
+  }
+
+  public static void main(String[] args) {
+    doTest(10000);
+  }
+
+  public static void doTest(int iters) {
+    // Just transform immediately.
+    doCommonClassRedefinition(Long.class, CLASS_BYTES, DEX_BYTES);
+    final Random r = new Random();
+    FuncCmp[] comps = new FuncCmp[] {
+      l2l("highestOneBit", Long::highestOneBit, RedefinedLongIntrinsics::highestOneBit),
+      l2l("lowestOneBit", Long::lowestOneBit, RedefinedLongIntrinsics::lowestOneBit),
+      l2i("numberOfLeadingZeros",
+          Long::numberOfLeadingZeros,
+          RedefinedLongIntrinsics::numberOfLeadingZeros),
+      l2i("numberOfTrailingZeros",
+          Long::numberOfTrailingZeros,
+          RedefinedLongIntrinsics::numberOfTrailingZeros),
+      l2i("bitCount", Long::bitCount, RedefinedLongIntrinsics::bitCount),
+      li2l("rotateLeft", r, Long::rotateLeft, RedefinedLongIntrinsics::rotateLeft),
+      li2l("rotateRight", r, Long::rotateRight, RedefinedLongIntrinsics::rotateRight),
+      l2l("reverse", Long::reverse, RedefinedLongIntrinsics::reverse),
+      l2i("signum", Long::signum, RedefinedLongIntrinsics::signum),
+      l2l("reverseBytes", Long::reverseBytes, RedefinedLongIntrinsics::reverseBytes),
+    };
+    for (FuncCmp f : comps) {
+      // Just actually use ints so we can cast them back int the tests to print them (since we
+      // deleted a bunch of the Long methods needed for printing longs)!
+      int failures = (int)r.ints(iters)
+                           .mapToLong((v) -> (long)v)
+                           .filter(f.negate()) // Get all the test cases that failed.
+                           .count();
+      if (failures != 0) {
+        double percent = 100.0d*((double)failures/(double)iters);
+        System.out.println("for intrinsic " + f.name + " " + failures + "/" + iters
+            + " (" + Double.toString(percent) + "%) tests failed!");
+      }
+    }
+    System.out.println("Finished!");
+  }
+
+  // Transforms the class
+  private static native void doCommonClassRedefinition(Class<?> target,
+                                                       byte[] class_file,
+                                                       byte[] dex_file);
+}
diff --git a/test/950-redefine-intrinsic/src/RedefinedLongIntrinsics.java b/test/950-redefine-intrinsic/src/RedefinedLongIntrinsics.java
new file mode 100644
index 0000000..0ada4a6
--- /dev/null
+++ b/test/950-redefine-intrinsic/src/RedefinedLongIntrinsics.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+
+/**
+ * The methods that are intrinsified in Long and their expected redefined implementations.
+ */
+class RedefinedLongIntrinsics {
+  // Intrinsic! Do something cool. Return i + 1
+  public static long highestOneBit(long i) {
+    return i + 1;
+  }
+
+  // Intrinsic! Do something cool. Return i - 1
+  public static long lowestOneBit(long i) {
+    return i - 1;
+  }
+
+  // Intrinsic! Do something cool. Return i + i
+  public static int numberOfLeadingZeros(long i) {
+    return (int)(i + i);
+  }
+
+  // Intrinsic! Do something cool. Return i & (i >>> 1);
+  public static int numberOfTrailingZeros(long i) {
+    return (int)(i & (i >>> 1));
+  }
+
+  // Intrinsic! Do something cool. Return 5
+  public static int bitCount(long i) {
+    return 5;
+  }
+
+  // Intrinsic! Do something cool. Return i
+  public static long rotateLeft(long i, int distance) {
+    return i;
+  }
+
+  // Intrinsic! Do something cool. Return 10 * i
+  public static long rotateRight(long i, int distance) {
+    return 10 * i;
+  }
+
+  // Intrinsic! Do something cool. Return -i
+  public static long reverse(long i) {
+    return -i;
+  }
+
+  // Intrinsic! Do something cool. Return 0
+  public static int signum(long i) {
+    return 0;
+  }
+
+  // Intrinsic! Do something cool. Return 0
+  public static long reverseBytes(long i) {
+    return 0;
+  }
+}
diff --git a/test/testrunner/env.py b/test/testrunner/env.py
index f327974..4336d77 100644
--- a/test/testrunner/env.py
+++ b/test/testrunner/env.py
@@ -176,6 +176,8 @@
 
 ART_TEST_WITH_STRACE = getEnvBoolean('ART_TEST_DEBUG_GC', False)
 
+EXTRA_DISABLED_TESTS = set(env.get("ART_TEST_RUN_TEST_SKIP", "").split())
+
 TARGET_2ND_ARCH = get_build_var('TARGET_2ND_ARCH')
 TARGET_ARCH = get_build_var('TARGET_ARCH')
 if TARGET_2ND_ARCH:
diff --git a/test/testrunner/testrunner.py b/test/testrunner/testrunner.py
index 748ec31..8c0b928 100755
--- a/test/testrunner/testrunner.py
+++ b/test/testrunner/testrunner.py
@@ -44,10 +44,10 @@
 In the end, the script will print the failed and skipped tests if any.
 
 """
+import argparse
 import fnmatch
 import itertools
 import json
-from optparse import OptionParser
 import os
 import re
 import subprocess
@@ -596,6 +596,8 @@
   """
   if dry_run:
     return True
+  if test in env.EXTRA_DISABLED_TESTS:
+    return True
   variants_list = DISABLED_TEST_CONTAINER.get(test, {})
   for variants in variants_list:
     variants_present = True
@@ -711,23 +713,26 @@
   global gdb
   global gdb_arg
 
-  parser = OptionParser()
-  parser.add_option('-t', '--test', dest='test', help='name of the test')
-  parser.add_option('-j', type='int', dest='n_thread')
+  parser = argparse.ArgumentParser(description="Runs all or a subset of the ART test suite.")
+  parser.add_argument('-t', '--test', dest='test', help='name of the test')
+  parser.add_argument('-j', type=int, dest='n_thread')
   for variant in TOTAL_VARIANTS_SET:
     flag = '--' + variant
     flag_dest = variant.replace('-', '_')
     if variant == '32' or variant == '64':
       flag_dest = 'n' + flag_dest
-    parser.add_option(flag, action='store_true', dest=flag_dest)
-  parser.add_option('--verbose', '-v', action='store_true', dest='verbose')
-  parser.add_option('--dry-run', action='store_true', dest='dry_run')
-  parser.add_option('-b', '--build-dependencies', action='store_true', dest='build')
-  parser.add_option('--gdb', action='store_true', dest='gdb')
-  parser.add_option('--gdb-arg', dest='gdb_arg')
+    parser.add_argument(flag, action='store_true', dest=flag_dest)
+  parser.add_argument('--verbose', '-v', action='store_true', dest='verbose')
+  parser.add_argument('--dry-run', action='store_true', dest='dry_run')
+  parser.add_argument("--skip", action="append", dest="skips", default=[],
+                      help="Skip the given test in all circumstances.")
+  parser.add_argument('-b', '--build-dependencies', action='store_true', dest='build')
+  parser.add_argument('--gdb', action='store_true', dest='gdb')
+  parser.add_argument('--gdb-arg', dest='gdb_arg')
 
-  options = parser.parse_args()[0]
+  options = parser.parse_args()
   test = ''
+  env.EXTRA_DISABLED_TESTS.update(set(options.skips))
   if options.test:
     test = parse_test_name(options.test)
   if options.pictest: