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// Copyright (C) 2006 Google Inc.
//
// 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.
// stackwalker_x86.h: x86-specific stackwalker.
//
// Provides stack frames given x86 register context and a memory region
// corresponding to an x86 stack.
//
// Author: Mark Mentovai
#ifndef PROCESSOR_STACKWALKER_X86_H__
#define PROCESSOR_STACKWALKER_X86_H__
#include "google/airbag_types.h"
#include "processor/stackwalker.h"
#include "processor/minidump_format.h"
namespace google_airbag {
class MinidumpContext;
class MinidumpModuleList;
class StackwalkerX86 : public Stackwalker {
public:
// context is a MinidumpContext object that gives access to x86-specific
// register state corresponding to the innermost called frame to be
// included in the stack. memory and modules are passed directly through
// to the base Stackwalker constructor.
StackwalkerX86(MinidumpContext* context,
MemoryRegion* memory,
MinidumpModuleList* modules);
private:
// Implementation of Stackwalker, using x86 context (%ebp, %eip) and
// stack conventions (saved %ebp at [%ebp], saved %eip at 4[%ebp]).
virtual bool GetContextFrame(StackFrame* frame);
virtual bool GetCallerFrame(StackFrame* frame);
// Stores the CPU context corresponding to the innermost stack frame to
// be returned by GetContextFrame.
const MDRawContextX86* context_;
// Stores the frame pointer returned in the last stack frame returned by
// GetContextFrame or GetCallerFrame.
u_int32_t last_frame_pointer_;
};
} // namespace google_airbag
#endif // PROCESSOR_STACKWALKER_X86_H__
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