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// Copyright 2019 Google

//

// 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.

#pragma once

#include "Crashlytics/Crashlytics/Helpers/FIRCLSThreadState.h"

#include "Crashlytics/Crashlytics/Helpers/FIRCLSUtility.h"

#if CLS_COMPACT_UNWINDING_SUPPORTED

#include "Crashlytics/Crashlytics/Unwind/Compact/FIRCLSCompactUnwind.h"

#endif

#include <mach/vm_types.h>

#include <stdbool.h>

#include "Crashlytics/Crashlytics/Unwind/FIRCLSUnwind_arch.h"

extern const uint32_t FIRCLSUnwindMaxFrames;

extern const uint32_t FIRCLSUnwindInfiniteRecursionCountThreshold;

typedef struct {

  FIRCLSThreadContext registers;

  uint32_t frameCount;

#if CLS_COMPACT_UNWINDING_SUPPORTED

  FIRCLSCompactUnwindContext compactUnwindState;

#endif

  uintptr_t lastFramePC;

  uint32_t repeatCount;

} FIRCLSUnwindContext;

// API

bool FIRCLSUnwindInit(FIRCLSUnwindContext* context, FIRCLSThreadContext threadContext);

bool FIRCLSUnwindNextFrame(FIRCLSUnwindContext* context);

uintptr_t FIRCLSUnwindGetPC(FIRCLSUnwindContext* context);

uintptr_t FIRCLSUnwindGetStackPointer(FIRCLSUnwindContext* context);

uint32_t FIRCLSUnwindGetFrameRepeatCount(FIRCLSUnwindContext* context);

// utility functions

bool FIRCLSUnwindIsAddressExecutable(vm_address_t address);

bool FIRCLSUnwindFirstExecutableAddress(vm_address_t start,

                                        vm_address_t end,

                                        vm_address_t* foundAddress);