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// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
// Class for patching compiled code.
#include "vm/allocation.h"
#include "vm/native_entry.h"
namespace dart {
// Forward declaration.
class Array;
class Code;
class ExternalLabel;
class Function;
class ICData;
class RawArray;
class RawCode;
class RawFunction;
class RawICData;
class RawObject;
class String;
// Stack-allocated class to create a scope where the specified region
// [address, addresss + size] has write access enabled. This is used
// when patching generated code. Access is reset to read-execute in
// the destructor of this scope.
class WritableInstructionsScope : public ValueObject {
WritableInstructionsScope(uword address, intptr_t size);
const uword address_;
const intptr_t size_;
class CodePatcher : public AllStatic {
// Dart static calls have a distinct, machine-dependent code pattern.
// Patch static call before return_address in given code to the new target.
static void PatchStaticCallAt(uword return_address,
const Code& code,
const Code& new_target);
// Return the target address of the static call before return_address
// in given code.
static RawCode* GetStaticCallTargetAt(uword return_address, const Code& code);
// Get instance call information. Returns the call target and sets each
// of the output parameters ic_data and arguments_descriptor if they are
// non-NULL.
static RawCode* GetInstanceCallAt(uword return_address,
const Code& code,
ICData* ic_data);
// Return target of an unoptimized static call and its ICData object
// (calls target via a stub).
static RawFunction* GetUnoptimizedStaticCallAt(uword return_address,
const Code& code,
ICData* ic_data);
static intptr_t InstanceCallSizeInBytes();
static void InsertDeoptimizationCallAt(uword start, uword target);
static void PatchPoolPointerCallAt(uword return_address,
const Code& code,
const Code& new_target);
static RawCode* GetNativeCallAt(uword return_address,
const Code& code,
NativeFunction* target);
static void PatchNativeCallAt(uword return_address,
const Code& code,
NativeFunction target,
const Code& trampoline);
} // namespace dart
#endif // VM_CODE_PATCHER_H_