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// Copyright (c) 2013 Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
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//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// stackwalker_mips.h: MIPS-specific stackwalker.
//
// Provides stack frames given MIPS register context and a memory region
// corresponding to a MIPSstack.
//
// Author: Tata Elxsi
#ifndef PROCESSOR_STACKWALKER_MIPS_H__
#define PROCESSOR_STACKWALKER_MIPS_H__
#include "google_breakpad/common/breakpad_types.h"
#include "google_breakpad/common/minidump_format.h"
#include "google_breakpad/processor/stackwalker.h"
#include "google_breakpad/processor/stack_frame_cpu.h"
#include "processor/cfi_frame_info.h"
namespace google_breakpad {
class CodeModules;
class StackwalkerMIPS : public Stackwalker {
public:
// Context is a MIPS context object that gives access to mips-specific
// register state corresponding to the innermost called frame to be
// included in the stack. The other arguments are passed directly
// through to the base Stackwalker constructor.
StackwalkerMIPS(const SystemInfo* system_info,
const MDRawContextMIPS* context,
MemoryRegion* memory,
const CodeModules* modules,
StackFrameSymbolizer* frame_symbolizer);
private:
// Implementation of Stackwalker, using mips context and stack conventions.
virtual StackFrame* GetContextFrame();
virtual StackFrame* GetCallerFrame(const CallStack* stack,
bool stack_scan_allowed);
// Use cfi_frame_info (derived from STACK CFI records) to construct
// the frame that called frames.back(). The caller takes ownership
// of the returned frame. Return NULL on failure.
StackFrameMIPS* GetCallerByCFIFrameInfo(const vector<StackFrame*>& frames,
CFIFrameInfo* cfi_frame_info);
// Scan the stack for plausible return address and frame pointer pair.
// The caller takes ownership of the returned frame. Return NULL on failure.
StackFrameMIPS* GetCallerByStackScan(const vector<StackFrame*>& frames);
// Stores the CPU context corresponding to the innermost stack frame to
// be returned by GetContextFrame.
const MDRawContextMIPS* context_;
};
} // namespace google_breakpad
#endif // PROCESSOR_STACKWALKER_MIPS_H__