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// Copyright (c) 2018, 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.
#ifndef RUNTIME_VM_REVERSE_PC_LOOKUP_CACHE_H_
#define RUNTIME_VM_REVERSE_PC_LOOKUP_CACHE_H_
#include "vm/allocation.h"
#include "vm/globals.h"
#include "vm/tagged_pointer.h"
namespace dart {
class IsolateGroup;
// This class provides mechanism to find Code and CompressedStackMaps
// objects corresponding to the given PC.
// Can only be used in AOT runtime with bare instructions.
class ReversePc : public AllStatic {
public:
// Looks for Code object corresponding to |pc| in the
// given isolate |group| and vm isolate group.
static CodePtr Lookup(IsolateGroup* group, uword pc, bool is_return_address);
// Looks for CompressedStackMaps corresponding to |pc| in the
// given isolate |group| and vm isolate group.
// Sets |code_start| to the beginning of the instructions corresponding
// to |pc| (like Code::PayloadStart()).
static CompressedStackMapsPtr FindCompressedStackMaps(IsolateGroup* group,
uword pc,
bool is_return_address,
uword* code_start);
private:
static ObjectPtr FindCodeDescriptorInGroup(IsolateGroup* group,
uword pc,
bool is_return_address,
uword* code_start);
static ObjectPtr FindCodeDescriptor(IsolateGroup* group,
uword pc,
bool is_return_address,
uword* code_start);
};
} // namespace dart
#endif // RUNTIME_VM_REVERSE_PC_LOOKUP_CACHE_H_