runtime/interpreter/interpreter_common.h

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef ART_RUNTIME_INTERPRETER_INTERPRETER_COMMON_H_
#define ART_RUNTIME_INTERPRETER_INTERPRETER_COMMON_H_

#include "interpreter.h"

#include <math.h>

#include <iostream>
#include <sstream>

#include "art_field-inl.h"
#include "art_method-inl.h"
#include "base/logging.h"
#include "base/macros.h"
#include "class_linker-inl.h"
#include "common_throws.h"
#include "dex_file-inl.h"
#include "dex_instruction-inl.h"
#include "entrypoints/entrypoint_utils-inl.h"
#include "handle_scope-inl.h"
#include "lambda/box_table.h"
#include "mirror/class-inl.h"
#include "mirror/method.h"
#include "mirror/object-inl.h"
#include "mirror/object_array-inl.h"
#include "mirror/string-inl.h"
#include "thread.h"
#include "well_known_classes.h"

using ::art::ArtMethod;
using ::art::mirror::Array;
using ::art::mirror::BooleanArray;
using ::art::mirror::ByteArray;
using ::art::mirror::CharArray;
using ::art::mirror::Class;
using ::art::mirror::ClassLoader;
using ::art::mirror::IntArray;
using ::art::mirror::LongArray;
using ::art::mirror::Object;
using ::art::mirror::ObjectArray;
using ::art::mirror::ShortArray;
using ::art::mirror::String;
using ::art::mirror::Throwable;

namespace art {
namespace interpreter {

// External references to both interpreter implementations.

template<bool do_access_check, bool transaction_active>
extern JValue ExecuteSwitchImpl(Thread* self, const DexFile::CodeItem* code_item,
                                ShadowFrame& shadow_frame, JValue result_register);

template<bool do_access_check, bool transaction_active>
extern JValue ExecuteGotoImpl(Thread* self, const DexFile::CodeItem* code_item,
                              ShadowFrame& shadow_frame, JValue result_register);

void ThrowNullPointerExceptionFromInterpreter()
    SHARED_REQUIRES(Locks::mutator_lock_);

static inline void DoMonitorEnter(Thread* self, Object* ref) NO_THREAD_SAFETY_ANALYSIS {
  ref->MonitorEnter(self);
}

static inline void DoMonitorExit(Thread* self, Object* ref) NO_THREAD_SAFETY_ANALYSIS {
  ref->MonitorExit(self);
}

void AbortTransactionF(Thread* self, const char* fmt, ...)
    __attribute__((__format__(__printf__, 2, 3)))
    SHARED_REQUIRES(Locks::mutator_lock_);

void AbortTransactionV(Thread* self, const char* fmt, va_list args)
    SHARED_REQUIRES(Locks::mutator_lock_);

void RecordArrayElementsInTransaction(mirror::Array* array, int32_t count)
    SHARED_REQUIRES(Locks::mutator_lock_);

// Invokes the given method. This is part of the invocation support and is used by DoInvoke and
// DoInvokeVirtualQuick functions.
// Returns true on success, otherwise throws an exception and returns false.
template<bool is_range, bool do_assignability_check>
bool DoCall(ArtMethod* called_method, Thread* self, ShadowFrame& shadow_frame,
            const Instruction* inst, uint16_t inst_data, JValue* result);

// Invokes the given lambda closure. This is part of the invocation support and is used by
// DoLambdaInvoke functions.
// Returns true on success, otherwise throws an exception and returns false.
template<bool is_range, bool do_assignability_check>
bool DoLambdaCall(ArtMethod* called_method, Thread* self, ShadowFrame& shadow_frame,
                  const Instruction* inst, uint16_t inst_data, JValue* result);

// Validates that the art method corresponding to a lambda method target
// is semantically valid:
//
// Must be ACC_STATIC and ACC_LAMBDA. Must be a concrete managed implementation
// (i.e. not native, not proxy, not abstract, ...).
//
// If the validation fails, return false and raise an exception.
static inline bool IsValidLambdaTargetOrThrow(ArtMethod* called_method)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  bool success = false;

  if (UNLIKELY(called_method == nullptr)) {
    // The shadow frame should already be pushed, so we don't need to update it.
  } else if (UNLIKELY(called_method->IsAbstract())) {
    ThrowAbstractMethodError(called_method);
    // TODO(iam): Also handle the case when the method is non-static, what error do we throw?
    // TODO(iam): Also make sure that ACC_LAMBDA is set.
  } else if (UNLIKELY(called_method->GetCodeItem() == nullptr)) {
    // Method could be native, proxy method, etc. Lambda targets have to be concrete impls,
    // so don't allow this.
  } else {
    success = true;
  }

  return success;
}

// Write out the 'ArtMethod*' into vreg and vreg+1
static inline void WriteLambdaClosureIntoVRegs(ShadowFrame& shadow_frame,
                                               const ArtMethod& called_method,
                                               uint32_t vreg) {
  // Split the method into a lo and hi 32 bits so we can encode them into 2 virtual registers.
  uint32_t called_method_lo = static_cast<uint32_t>(reinterpret_cast<uintptr_t>(&called_method));
  uint32_t called_method_hi = static_cast<uint32_t>(reinterpret_cast<uint64_t>(&called_method)
                                                    >> BitSizeOf<uint32_t>());
  // Use uint64_t instead of uintptr_t to allow shifting past the max on 32-bit.
  static_assert(sizeof(uint64_t) >= sizeof(uintptr_t), "Impossible");

  DCHECK_NE(called_method_lo | called_method_hi, 0u);

  shadow_frame.SetVReg(vreg, called_method_lo);
  shadow_frame.SetVReg(vreg + 1, called_method_hi);
}

// Handles create-lambda instructions.
// Returns true on success, otherwise throws an exception and returns false.
// (Exceptions are thrown by creating a new exception and then being put in the thread TLS)
//
// As a work-in-progress implementation, this shoves the ArtMethod object corresponding
// to the target dex method index into the target register vA and vA + 1.
template<bool do_access_check>
static inline bool DoCreateLambda(Thread* self, ShadowFrame& shadow_frame,
                                  const Instruction* inst) {
  /*
   * create-lambda is opcode 0x21c
   * - vA is the target register where the closure will be stored into
   *   (also stores into vA + 1)
   * - vB is the method index which will be the target for a later invoke-lambda
   */
  const uint32_t method_idx = inst->VRegB_21c();
  mirror::Object* receiver = nullptr;  // Always static. (see 'kStatic')
  ArtMethod* sf_method = shadow_frame.GetMethod();
  ArtMethod* const called_method = FindMethodFromCode<kStatic, do_access_check>(
      method_idx, &receiver, sf_method, self);

  uint32_t vregA = inst->VRegA_21c();

  if (UNLIKELY(!IsValidLambdaTargetOrThrow(called_method))) {
    CHECK(self->IsExceptionPending());
    shadow_frame.SetVReg(vregA, 0u);
    shadow_frame.SetVReg(vregA + 1, 0u);
    return false;
  }

  WriteLambdaClosureIntoVRegs(shadow_frame, *called_method, vregA);
  return true;
}

// Reads out the 'ArtMethod*' stored inside of vreg and vreg+1
//
// Validates that the art method points to a valid lambda function, otherwise throws
// an exception and returns null.
// (Exceptions are thrown by creating a new exception and then being put in the thread TLS)
static inline ArtMethod* ReadLambdaClosureFromVRegsOrThrow(ShadowFrame& shadow_frame,
                                                           uint32_t vreg)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  // TODO(iam): Introduce a closure abstraction that will contain the captured variables
  // instead of just an ArtMethod.
  // This is temporarily using 2 vregs because a native ArtMethod can be up to 64-bit,
  // but once proper variable capture is implemented it will only use 1 vreg.
  uint32_t vc_value_lo = shadow_frame.GetVReg(vreg);
  uint32_t vc_value_hi = shadow_frame.GetVReg(vreg + 1);

  uint64_t vc_value_ptr = (static_cast<uint64_t>(vc_value_hi) << BitSizeOf<uint32_t>())
                           | vc_value_lo;

  // Use uint64_t instead of uintptr_t to allow left-shifting past the max on 32-bit.
  static_assert(sizeof(uint64_t) >= sizeof(uintptr_t), "Impossible");
  ArtMethod* const called_method = reinterpret_cast<ArtMethod* const>(vc_value_ptr);

  // Guard against the user passing a null closure, which is odd but (sadly) semantically valid.
  if (UNLIKELY(called_method == nullptr)) {
    ThrowNullPointerExceptionFromInterpreter();
    return nullptr;
  } else if (UNLIKELY(!IsValidLambdaTargetOrThrow(called_method))) {
    return nullptr;
  }

  return called_method;
}

template<bool do_access_check>
static inline bool DoInvokeLambda(Thread* self, ShadowFrame& shadow_frame, const Instruction* inst,
                                  uint16_t inst_data, JValue* result) {
  /*
   * invoke-lambda is opcode 0x25
   *
   * - vC is the closure register (both vC and vC + 1 will be used to store the closure).
   * - vB is the number of additional registers up to |{vD,vE,vF,vG}| (4)
   * - the rest of the registers are always var-args
   *
   * - reading var-args for 0x25 gets us vD,vE,vF,vG (but not vB)
   */
  uint32_t vC = inst->VRegC_25x();
  ArtMethod* const called_method = ReadLambdaClosureFromVRegsOrThrow(shadow_frame, vC);

  // Failed lambda target runtime check, an exception was raised.
  if (UNLIKELY(called_method == nullptr)) {
    CHECK(self->IsExceptionPending());
    result->SetJ(0);
    return false;
  }

  // Invoke a non-range lambda
  return DoLambdaCall<false, do_access_check>(called_method, self, shadow_frame, inst, inst_data,
                                              result);
}

// Handles invoke-XXX/range instructions.
// Returns true on success, otherwise throws an exception and returns false.
template<InvokeType type, bool is_range, bool do_access_check>
static inline bool DoInvoke(Thread* self, ShadowFrame& shadow_frame, const Instruction* inst,
                            uint16_t inst_data, JValue* result) {
  const uint32_t method_idx = (is_range) ? inst->VRegB_3rc() : inst->VRegB_35c();
  const uint32_t vregC = (is_range) ? inst->VRegC_3rc() : inst->VRegC_35c();
  Object* receiver = (type == kStatic) ? nullptr : shadow_frame.GetVRegReference(vregC);
  ArtMethod* sf_method = shadow_frame.GetMethod();
  ArtMethod* const called_method = FindMethodFromCode<type, do_access_check>(
      method_idx, &receiver, sf_method, self);
  // The shadow frame should already be pushed, so we don't need to update it.
  if (UNLIKELY(called_method == nullptr)) {
    CHECK(self->IsExceptionPending());
    result->SetJ(0);
    return false;
  } else if (UNLIKELY(called_method->IsAbstract())) {
    ThrowAbstractMethodError(called_method);
    result->SetJ(0);
    return false;
  } else {
    if (type == kVirtual || type == kInterface) {
      instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
      if (UNLIKELY(instrumentation->HasInvokeVirtualOrInterfaceListeners())) {
        instrumentation->InvokeVirtualOrInterface(
            self, receiver, sf_method, shadow_frame.GetDexPC(), called_method);
      }
    }
    return DoCall<is_range, do_access_check>(called_method, self, shadow_frame, inst, inst_data,
                                             result);
  }
}

// Handles invoke-virtual-quick and invoke-virtual-quick-range instructions.
// Returns true on success, otherwise throws an exception and returns false.
template<bool is_range>
static inline bool DoInvokeVirtualQuick(Thread* self, ShadowFrame& shadow_frame,
                                        const Instruction* inst, uint16_t inst_data,
                                        JValue* result) {
  const uint32_t vregC = (is_range) ? inst->VRegC_3rc() : inst->VRegC_35c();
  Object* const receiver = shadow_frame.GetVRegReference(vregC);
  if (UNLIKELY(receiver == nullptr)) {
    // We lost the reference to the method index so we cannot get a more
    // precised exception message.
    ThrowNullPointerExceptionFromDexPC();
    return false;
  }
  const uint32_t vtable_idx = (is_range) ? inst->VRegB_3rc() : inst->VRegB_35c();
  CHECK(receiver->GetClass()->ShouldHaveEmbeddedImtAndVTable());
  ArtMethod* const called_method = receiver->GetClass()->GetEmbeddedVTableEntry(
      vtable_idx, sizeof(void*));
  if (UNLIKELY(called_method == nullptr)) {
    CHECK(self->IsExceptionPending());
    result->SetJ(0);
    return false;
  } else if (UNLIKELY(called_method->IsAbstract())) {
    ThrowAbstractMethodError(called_method);
    result->SetJ(0);
    return false;
  } else {
    instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
    if (UNLIKELY(instrumentation->HasInvokeVirtualOrInterfaceListeners())) {
      instrumentation->InvokeVirtualOrInterface(
          self, receiver, shadow_frame.GetMethod(), shadow_frame.GetDexPC(), called_method);
    }
    // No need to check since we've been quickened.
    return DoCall<is_range, false>(called_method, self, shadow_frame, inst, inst_data, result);
  }
}

// Handles iget-XXX and sget-XXX instructions.
// Returns true on success, otherwise throws an exception and returns false.
template<FindFieldType find_type, Primitive::Type field_type, bool do_access_check>
bool DoFieldGet(Thread* self, ShadowFrame& shadow_frame, const Instruction* inst,
                uint16_t inst_data) SHARED_REQUIRES(Locks::mutator_lock_);

// Handles iget-quick, iget-wide-quick and iget-object-quick instructions.
// Returns true on success, otherwise throws an exception and returns false.
template<Primitive::Type field_type>
bool DoIGetQuick(ShadowFrame& shadow_frame, const Instruction* inst, uint16_t inst_data)
    SHARED_REQUIRES(Locks::mutator_lock_);

// Handles iput-XXX and sput-XXX instructions.
// Returns true on success, otherwise throws an exception and returns false.
template<FindFieldType find_type, Primitive::Type field_type, bool do_access_check,
         bool transaction_active>
bool DoFieldPut(Thread* self, const ShadowFrame& shadow_frame, const Instruction* inst,
                uint16_t inst_data) SHARED_REQUIRES(Locks::mutator_lock_);

// Handles iput-quick, iput-wide-quick and iput-object-quick instructions.
// Returns true on success, otherwise throws an exception and returns false.
template<Primitive::Type field_type, bool transaction_active>
bool DoIPutQuick(const ShadowFrame& shadow_frame, const Instruction* inst, uint16_t inst_data)
    SHARED_REQUIRES(Locks::mutator_lock_);


// Handles string resolution for const-string and const-string-jumbo instructions. Also ensures the
// java.lang.String class is initialized.
static inline String* ResolveString(Thread* self, ShadowFrame& shadow_frame, uint32_t string_idx)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  Class* java_lang_string_class = String::GetJavaLangString();
  if (UNLIKELY(!java_lang_string_class->IsInitialized())) {
    ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
    StackHandleScope<1> hs(self);
    Handle<mirror::Class> h_class(hs.NewHandle(java_lang_string_class));
    if (UNLIKELY(!class_linker->EnsureInitialized(self, h_class, true, true))) {
      DCHECK(self->IsExceptionPending());
      return nullptr;
    }
  }
  ArtMethod* method = shadow_frame.GetMethod();
  mirror::Class* declaring_class = method->GetDeclaringClass();
  // MethodVerifier refuses methods with string_idx out of bounds.
  DCHECK_LT(string_idx, declaring_class->GetDexCache()->NumStrings());
  mirror::String* s = declaring_class->GetDexCacheStrings()[string_idx].Read();
  if (UNLIKELY(s == nullptr)) {
    StackHandleScope<1> hs(self);
    Handle<mirror::DexCache> dex_cache(hs.NewHandle(declaring_class->GetDexCache()));
    s = Runtime::Current()->GetClassLinker()->ResolveString(*method->GetDexFile(), string_idx,
                                                            dex_cache);
  }
  return s;
}

// Handles div-int, div-int/2addr, div-int/li16 and div-int/lit8 instructions.
// Returns true on success, otherwise throws a java.lang.ArithmeticException and return false.
static inline bool DoIntDivide(ShadowFrame& shadow_frame, size_t result_reg,
                               int32_t dividend, int32_t divisor)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  constexpr int32_t kMinInt = std::numeric_limits<int32_t>::min();
  if (UNLIKELY(divisor == 0)) {
    ThrowArithmeticExceptionDivideByZero();
    return false;
  }
  if (UNLIKELY(dividend == kMinInt && divisor == -1)) {
    shadow_frame.SetVReg(result_reg, kMinInt);
  } else {
    shadow_frame.SetVReg(result_reg, dividend / divisor);
  }
  return true;
}

// Handles rem-int, rem-int/2addr, rem-int/li16 and rem-int/lit8 instructions.
// Returns true on success, otherwise throws a java.lang.ArithmeticException and return false.
static inline bool DoIntRemainder(ShadowFrame& shadow_frame, size_t result_reg,
                                  int32_t dividend, int32_t divisor)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  constexpr int32_t kMinInt = std::numeric_limits<int32_t>::min();
  if (UNLIKELY(divisor == 0)) {
    ThrowArithmeticExceptionDivideByZero();
    return false;
  }
  if (UNLIKELY(dividend == kMinInt && divisor == -1)) {
    shadow_frame.SetVReg(result_reg, 0);
  } else {
    shadow_frame.SetVReg(result_reg, dividend % divisor);
  }
  return true;
}

// Handles div-long and div-long-2addr instructions.
// Returns true on success, otherwise throws a java.lang.ArithmeticException and return false.
static inline bool DoLongDivide(ShadowFrame& shadow_frame, size_t result_reg,
                                int64_t dividend, int64_t divisor)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  const int64_t kMinLong = std::numeric_limits<int64_t>::min();
  if (UNLIKELY(divisor == 0)) {
    ThrowArithmeticExceptionDivideByZero();
    return false;
  }
  if (UNLIKELY(dividend == kMinLong && divisor == -1)) {
    shadow_frame.SetVRegLong(result_reg, kMinLong);
  } else {
    shadow_frame.SetVRegLong(result_reg, dividend / divisor);
  }
  return true;
}

// Handles rem-long and rem-long-2addr instructions.
// Returns true on success, otherwise throws a java.lang.ArithmeticException and return false.
static inline bool DoLongRemainder(ShadowFrame& shadow_frame, size_t result_reg,
                                   int64_t dividend, int64_t divisor)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  const int64_t kMinLong = std::numeric_limits<int64_t>::min();
  if (UNLIKELY(divisor == 0)) {
    ThrowArithmeticExceptionDivideByZero();
    return false;
  }
  if (UNLIKELY(dividend == kMinLong && divisor == -1)) {
    shadow_frame.SetVRegLong(result_reg, 0);
  } else {
    shadow_frame.SetVRegLong(result_reg, dividend % divisor);
  }
  return true;
}

// Handles filled-new-array and filled-new-array-range instructions.
// Returns true on success, otherwise throws an exception and returns false.
template <bool is_range, bool do_access_check, bool transaction_active>
bool DoFilledNewArray(const Instruction* inst, const ShadowFrame& shadow_frame,
                      Thread* self, JValue* result);

// Handles packed-switch instruction.
// Returns the branch offset to the next instruction to execute.
static inline int32_t DoPackedSwitch(const Instruction* inst, const ShadowFrame& shadow_frame,
                                     uint16_t inst_data)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  DCHECK(inst->Opcode() == Instruction::PACKED_SWITCH);
  const uint16_t* switch_data = reinterpret_cast<const uint16_t*>(inst) + inst->VRegB_31t();
  int32_t test_val = shadow_frame.GetVReg(inst->VRegA_31t(inst_data));
  DCHECK_EQ(switch_data[0], static_cast<uint16_t>(Instruction::kPackedSwitchSignature));
  uint16_t size = switch_data[1];
  if (size == 0) {
    // Empty packed switch, move forward by 3 (size of PACKED_SWITCH).
    return 3;
  }
  const int32_t* keys = reinterpret_cast<const int32_t*>(&switch_data[2]);
  DCHECK_ALIGNED(keys, 4);
  int32_t first_key = keys[0];
  const int32_t* targets = reinterpret_cast<const int32_t*>(&switch_data[4]);
  DCHECK_ALIGNED(targets, 4);
  int32_t index = test_val - first_key;
  if (index >= 0 && index < size) {
    return targets[index];
  } else {
    // No corresponding value: move forward by 3 (size of PACKED_SWITCH).
    return 3;
  }
}

// Handles sparse-switch instruction.
// Returns the branch offset to the next instruction to execute.
static inline int32_t DoSparseSwitch(const Instruction* inst, const ShadowFrame& shadow_frame,
                                     uint16_t inst_data)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  DCHECK(inst->Opcode() == Instruction::SPARSE_SWITCH);
  const uint16_t* switch_data = reinterpret_cast<const uint16_t*>(inst) + inst->VRegB_31t();
  int32_t test_val = shadow_frame.GetVReg(inst->VRegA_31t(inst_data));
  DCHECK_EQ(switch_data[0], static_cast<uint16_t>(Instruction::kSparseSwitchSignature));
  uint16_t size = switch_data[1];
  // Return length of SPARSE_SWITCH if size is 0.
  if (size == 0) {
    return 3;
  }
  const int32_t* keys = reinterpret_cast<const int32_t*>(&switch_data[2]);
  DCHECK_ALIGNED(keys, 4);
  const int32_t* entries = keys + size;
  DCHECK_ALIGNED(entries, 4);
  int lo = 0;
  int hi = size - 1;
  while (lo <= hi) {
    int mid = (lo + hi) / 2;
    int32_t foundVal = keys[mid];
    if (test_val < foundVal) {
      hi = mid - 1;
    } else if (test_val > foundVal) {
      lo = mid + 1;
    } else {
      return entries[mid];
    }
  }
  // No corresponding value: move forward by 3 (size of SPARSE_SWITCH).
  return 3;
}

template <bool _do_check>
static inline bool DoBoxLambda(Thread* self, ShadowFrame& shadow_frame, const Instruction* inst,
                               uint16_t inst_data) SHARED_REQUIRES(Locks::mutator_lock_) {
  /*
   * box-lambda vA, vB /// opcode 0xf8, format 22x
   * - vA is the target register where the Object representation of the closure will be stored into
   * - vB is a closure (made by create-lambda)
   *   (also reads vB + 1)
   */
  uint32_t vreg_target_object = inst->VRegA_22x(inst_data);
  uint32_t vreg_source_closure = inst->VRegB_22x();

  ArtMethod* closure_method = ReadLambdaClosureFromVRegsOrThrow(shadow_frame,
                                                                vreg_source_closure);

  // Failed lambda target runtime check, an exception was raised.
  if (UNLIKELY(closure_method == nullptr)) {
    CHECK(self->IsExceptionPending());
    return false;
  }

  mirror::Object* closure_as_object =
      Runtime::Current()->GetLambdaBoxTable()->BoxLambda(closure_method);

  // Failed to box the lambda, an exception was raised.
  if (UNLIKELY(closure_as_object == nullptr)) {
    CHECK(self->IsExceptionPending());
    return false;
  }

  shadow_frame.SetVRegReference(vreg_target_object, closure_as_object);
  return true;
}

template <bool _do_check> SHARED_REQUIRES(Locks::mutator_lock_)
static inline bool DoUnboxLambda(Thread* self,
                                 ShadowFrame& shadow_frame,
                                 const Instruction* inst,
                                 uint16_t inst_data) {
  /*
   * unbox-lambda vA, vB, [type id] /// opcode 0xf9, format 22c
   * - vA is the target register where the closure will be written into
   *   (also writes vA + 1)
   * - vB is the Object representation of the closure (made by box-lambda)
   */
  uint32_t vreg_target_closure = inst->VRegA_22c(inst_data);
  uint32_t vreg_source_object = inst->VRegB_22c();

  // Raise NullPointerException if object is null
  mirror::Object* boxed_closure_object = shadow_frame.GetVRegReference(vreg_source_object);
  if (UNLIKELY(boxed_closure_object == nullptr)) {
    ThrowNullPointerExceptionFromInterpreter();
    return false;
  }

  ArtMethod* unboxed_closure = nullptr;
  // Raise an exception if unboxing fails.
  if (!Runtime::Current()->GetLambdaBoxTable()->UnboxLambda(boxed_closure_object,
                                                            &unboxed_closure)) {
    CHECK(self->IsExceptionPending());
    return false;
  }

  DCHECK(unboxed_closure != nullptr);
  WriteLambdaClosureIntoVRegs(shadow_frame, *unboxed_closure, vreg_target_closure);
  return true;
}

uint32_t FindNextInstructionFollowingException(Thread* self, ShadowFrame& shadow_frame,
    uint32_t dex_pc, const instrumentation::Instrumentation* instrumentation)
        SHARED_REQUIRES(Locks::mutator_lock_);

NO_RETURN void UnexpectedOpcode(const Instruction* inst, const ShadowFrame& shadow_frame)
  __attribute__((cold))
  SHARED_REQUIRES(Locks::mutator_lock_);

static inline void TraceExecution(const ShadowFrame& shadow_frame, const Instruction* inst,
                                  const uint32_t dex_pc)
    SHARED_REQUIRES(Locks::mutator_lock_) {
  constexpr bool kTracing = false;
  if (kTracing) {
#define TRACE_LOG std::cerr
    std::ostringstream oss;
    oss << PrettyMethod(shadow_frame.GetMethod())
        << StringPrintf("\n0x%x: ", dex_pc)
        << inst->DumpString(shadow_frame.GetMethod()->GetDexFile()) << "\n";
    for (uint32_t i = 0; i < shadow_frame.NumberOfVRegs(); ++i) {
      uint32_t raw_value = shadow_frame.GetVReg(i);
      Object* ref_value = shadow_frame.GetVRegReference(i);
      oss << StringPrintf(" vreg%u=0x%08X", i, raw_value);
      if (ref_value != nullptr) {
        if (ref_value->GetClass()->IsStringClass() &&
            ref_value->AsString()->GetValue() != nullptr) {
          oss << "/java.lang.String \"" << ref_value->AsString()->ToModifiedUtf8() << "\"";
        } else {
          oss << "/" << PrettyTypeOf(ref_value);
        }
      }
    }
    TRACE_LOG << oss.str() << "\n";
#undef TRACE_LOG
  }
}

static inline bool IsBackwardBranch(int32_t branch_offset) {
  return branch_offset <= 0;
}

// Explicitly instantiate all DoInvoke functions.
#define EXPLICIT_DO_INVOKE_TEMPLATE_DECL(_type, _is_range, _do_check)                      \
  template SHARED_REQUIRES(Locks::mutator_lock_)                                     \
  bool DoInvoke<_type, _is_range, _do_check>(Thread* self, ShadowFrame& shadow_frame,      \
                                             const Instruction* inst, uint16_t inst_data,  \
                                             JValue* result)

#define EXPLICIT_DO_INVOKE_ALL_TEMPLATE_DECL(_type)       \
  EXPLICIT_DO_INVOKE_TEMPLATE_DECL(_type, false, false);  \
  EXPLICIT_DO_INVOKE_TEMPLATE_DECL(_type, false, true);   \
  EXPLICIT_DO_INVOKE_TEMPLATE_DECL(_type, true, false);   \
  EXPLICIT_DO_INVOKE_TEMPLATE_DECL(_type, true, true);

EXPLICIT_DO_INVOKE_ALL_TEMPLATE_DECL(kStatic)      // invoke-static/range.
EXPLICIT_DO_INVOKE_ALL_TEMPLATE_DECL(kDirect)      // invoke-direct/range.
EXPLICIT_DO_INVOKE_ALL_TEMPLATE_DECL(kVirtual)     // invoke-virtual/range.
EXPLICIT_DO_INVOKE_ALL_TEMPLATE_DECL(kSuper)       // invoke-super/range.
EXPLICIT_DO_INVOKE_ALL_TEMPLATE_DECL(kInterface)   // invoke-interface/range.
#undef EXPLICIT_DO_INVOKE_ALL_TEMPLATE_DECL
#undef EXPLICIT_DO_INVOKE_TEMPLATE_DECL

// Explicitly instantiate all DoInvokeVirtualQuick functions.
#define EXPLICIT_DO_INVOKE_VIRTUAL_QUICK_TEMPLATE_DECL(_is_range)                    \
  template SHARED_REQUIRES(Locks::mutator_lock_)                               \
  bool DoInvokeVirtualQuick<_is_range>(Thread* self, ShadowFrame& shadow_frame,      \
                                       const Instruction* inst, uint16_t inst_data,  \
                                       JValue* result)

EXPLICIT_DO_INVOKE_VIRTUAL_QUICK_TEMPLATE_DECL(false);  // invoke-virtual-quick.
EXPLICIT_DO_INVOKE_VIRTUAL_QUICK_TEMPLATE_DECL(true);   // invoke-virtual-quick-range.
#undef EXPLICIT_INSTANTIATION_DO_INVOKE_VIRTUAL_QUICK

// Explicitly instantiate all DoCreateLambda functions.
#define EXPLICIT_DO_CREATE_LAMBDA_DECL(_do_check)                                    \
template SHARED_REQUIRES(Locks::mutator_lock_)                                 \
bool DoCreateLambda<_do_check>(Thread* self, ShadowFrame& shadow_frame,              \
                        const Instruction* inst)

EXPLICIT_DO_CREATE_LAMBDA_DECL(false);  // create-lambda
EXPLICIT_DO_CREATE_LAMBDA_DECL(true);   // create-lambda
#undef EXPLICIT_DO_CREATE_LAMBDA_DECL

// Explicitly instantiate all DoInvokeLambda functions.
#define EXPLICIT_DO_INVOKE_LAMBDA_DECL(_do_check)                                    \
template SHARED_REQUIRES(Locks::mutator_lock_)                                 \
bool DoInvokeLambda<_do_check>(Thread* self, ShadowFrame& shadow_frame, const Instruction* inst, \
                               uint16_t inst_data, JValue* result);

EXPLICIT_DO_INVOKE_LAMBDA_DECL(false);  // invoke-lambda
EXPLICIT_DO_INVOKE_LAMBDA_DECL(true);   // invoke-lambda
#undef EXPLICIT_DO_INVOKE_LAMBDA_DECL

// Explicitly instantiate all DoBoxLambda functions.
#define EXPLICIT_DO_BOX_LAMBDA_DECL(_do_check)                                                \
template SHARED_REQUIRES(Locks::mutator_lock_)                                          \
bool DoBoxLambda<_do_check>(Thread* self, ShadowFrame& shadow_frame, const Instruction* inst, \
                            uint16_t inst_data);

EXPLICIT_DO_BOX_LAMBDA_DECL(false);  // box-lambda
EXPLICIT_DO_BOX_LAMBDA_DECL(true);   // box-lambda
#undef EXPLICIT_DO_BOX_LAMBDA_DECL

// Explicitly instantiate all DoUnBoxLambda functions.
#define EXPLICIT_DO_UNBOX_LAMBDA_DECL(_do_check)                                                \
template SHARED_REQUIRES(Locks::mutator_lock_)                                            \
bool DoUnboxLambda<_do_check>(Thread* self, ShadowFrame& shadow_frame, const Instruction* inst, \
                              uint16_t inst_data);

EXPLICIT_DO_UNBOX_LAMBDA_DECL(false);  // unbox-lambda
EXPLICIT_DO_UNBOX_LAMBDA_DECL(true);   // unbox-lambda
#undef EXPLICIT_DO_BOX_LAMBDA_DECL


}  // namespace interpreter
}  // namespace art

#endif  // ART_RUNTIME_INTERPRETER_INTERPRETER_COMMON_H_