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Diffstat (limited to 'src/sim/mem_state.hh')
-rw-r--r-- | src/sim/mem_state.hh | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/src/sim/mem_state.hh b/src/sim/mem_state.hh new file mode 100644 index 000000000..03a719752 --- /dev/null +++ b/src/sim/mem_state.hh @@ -0,0 +1,100 @@ +/* + * Copyright (c) 2017 Advanced Micro Devices, 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 the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Author: Brandon Potter + */ + +#ifndef SRC_SIM_MEM_STATE_HH +#define SRC_SIM_MEM_STATE_HH + +/** + * This class holds the memory state for the Process class and all of its + * derived, architecture-specific children. + * + * The fields held in this class dynamically change as the process object + * is run in the simulator. They are updated by system calls and faults; + * each change represents a modification to the process address space. + * The stack, heap, and mmap boundaries are held with this class along with + * the base of the next thread stack. + * + * The class is meant to be allocated dynamically and shared through a + * pointer interface because two process can potentially share their virtual + * address space if certain options are passed into the clone(2). + */ +class MemState +{ + public: + MemState(Addr brk_point, Addr stack_base, Addr max_stack_size, + Addr next_thread_stack_base, Addr mmap_end) + : _brkPoint(brk_point), _stackBase(stack_base), _stackSize(0), + _maxStackSize(max_stack_size), _stackMin(0), + _nextThreadStackBase(next_thread_stack_base), _mmapEnd(mmap_end) + { } + + MemState& + operator=(const MemState &in) + { + if (this == &in) + return *this; + + _brkPoint = in._brkPoint; + _stackBase = in._stackBase; + _stackSize = in._stackSize; + _maxStackSize = in._maxStackSize; + _stackMin = in._stackMin; + _nextThreadStackBase = in._nextThreadStackBase; + _mmapEnd = in._mmapEnd; + return *this; + } + + Addr getBrkPoint() const { return _brkPoint; } + Addr getStackBase() const { return _stackBase; } + Addr getStackSize() const { return _stackSize; } + Addr getMaxStackSize() const { return _maxStackSize; } + Addr getStackMin() const { return _stackMin; } + Addr getNextThreadStackBase() const { return _nextThreadStackBase; } + Addr getMmapEnd() const { return _mmapEnd; } + + void setBrkPoint(Addr brk_point) { _brkPoint = brk_point; } + void setStackBase(Addr stack_base) { _stackBase = stack_base; } + void setStackSize(Addr stack_size) { _stackSize = stack_size; } + void setMaxStackSize(Addr max_stack) { _maxStackSize = max_stack; } + void setStackMin(Addr stack_min) { _stackMin = stack_min; } + void setNextThreadStackBase(Addr ntsb) { _nextThreadStackBase = ntsb; } + void setMmapEnd(Addr mmap_end) { _mmapEnd = mmap_end; } + + private: + Addr _brkPoint; + Addr _stackBase; + Addr _stackSize; + Addr _maxStackSize; + Addr _stackMin; + Addr _nextThreadStackBase; + Addr _mmapEnd; +}; + +#endif |