00232a868e
This fixes a fatal already mapped error in FuncPageTable::allocate that occurs in some cases when restoring from a checkpoint. Change-Id: Ib726a69358118626663e42b7f14889b0d3a98de0 Reported-by: Ruohuang Zheng <zhengruohuang@gmail.com> Signed-off-by: Austin Harris <austinharris@utexas.edu> Reviewed-on: https://gem5-review.googlesource.com/5901 Reviewed-by: Gabe Black <gabeblack@google.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>
126 lines
4.9 KiB
C++
126 lines
4.9 KiB
C++
/*
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* Copyright (c) 2017 Advanced Micro Devices, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Author: Brandon Potter
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*/
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#ifndef SRC_SIM_MEM_STATE_HH
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#define SRC_SIM_MEM_STATE_HH
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#include "sim/serialize.hh"
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/**
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* This class holds the memory state for the Process class and all of its
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* derived, architecture-specific children.
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*
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* The fields held in this class dynamically change as the process object
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* is run in the simulator. They are updated by system calls and faults;
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* each change represents a modification to the process address space.
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* The stack, heap, and mmap boundaries are held with this class along with
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* the base of the next thread stack.
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*
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* The class is meant to be allocated dynamically and shared through a
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* pointer interface because two process can potentially share their virtual
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* address space if certain options are passed into the clone(2).
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*/
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class MemState : public Serializable
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{
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public:
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MemState(Addr brk_point, Addr stack_base, Addr max_stack_size,
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Addr next_thread_stack_base, Addr mmap_end)
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: _brkPoint(brk_point), _stackBase(stack_base), _stackSize(0),
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_maxStackSize(max_stack_size), _stackMin(0),
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_nextThreadStackBase(next_thread_stack_base), _mmapEnd(mmap_end)
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{ }
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MemState&
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operator=(const MemState &in)
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{
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if (this == &in)
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return *this;
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_brkPoint = in._brkPoint;
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_stackBase = in._stackBase;
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_stackSize = in._stackSize;
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_maxStackSize = in._maxStackSize;
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_stackMin = in._stackMin;
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_nextThreadStackBase = in._nextThreadStackBase;
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_mmapEnd = in._mmapEnd;
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return *this;
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}
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Addr getBrkPoint() const { return _brkPoint; }
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Addr getStackBase() const { return _stackBase; }
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Addr getStackSize() const { return _stackSize; }
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Addr getMaxStackSize() const { return _maxStackSize; }
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Addr getStackMin() const { return _stackMin; }
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Addr getNextThreadStackBase() const { return _nextThreadStackBase; }
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Addr getMmapEnd() const { return _mmapEnd; }
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void setBrkPoint(Addr brk_point) { _brkPoint = brk_point; }
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void setStackBase(Addr stack_base) { _stackBase = stack_base; }
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void setStackSize(Addr stack_size) { _stackSize = stack_size; }
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void setMaxStackSize(Addr max_stack) { _maxStackSize = max_stack; }
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void setStackMin(Addr stack_min) { _stackMin = stack_min; }
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void setNextThreadStackBase(Addr ntsb) { _nextThreadStackBase = ntsb; }
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void setMmapEnd(Addr mmap_end) { _mmapEnd = mmap_end; }
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void
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serialize(CheckpointOut &cp) const override
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{
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paramOut(cp, "brkPoint", _brkPoint);
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paramOut(cp, "stackBase", _stackBase);
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paramOut(cp, "stackSize", _stackSize);
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paramOut(cp, "maxStackSize", _maxStackSize);
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paramOut(cp, "stackMin", _stackMin);
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paramOut(cp, "nextThreadStackBase", _nextThreadStackBase);
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paramOut(cp, "mmapEnd", _mmapEnd);
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}
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void
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unserialize(CheckpointIn &cp) override
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{
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paramIn(cp, "brkPoint", _brkPoint);
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paramIn(cp, "stackBase", _stackBase);
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paramIn(cp, "stackSize", _stackSize);
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paramIn(cp, "maxStackSize", _maxStackSize);
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paramIn(cp, "stackMin", _stackMin);
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paramIn(cp, "nextThreadStackBase", _nextThreadStackBase);
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paramIn(cp, "mmapEnd", _mmapEnd);
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}
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private:
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Addr _brkPoint;
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Addr _stackBase;
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Addr _stackSize;
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Addr _maxStackSize;
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Addr _stackMin;
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Addr _nextThreadStackBase;
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Addr _mmapEnd;
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};
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#endif
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