The Process class is full of implementation details and structures related to SE Mode. This changeset factors out an internal class from Process and moves it into a separate file. The purpose behind doing this is to clean up the code and make it a bit more modular. Change-Id: Ic6941a1657751e8d51d5b6b1dcc04f1195884280 Reviewed-on: https://gem5-review.googlesource.com/2263 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
219 lines
7.4 KiB
C++
219 lines
7.4 KiB
C++
/*
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* Copyright (c) 2014-2016 Advanced Micro Devices, Inc.
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* Copyright (c) 2001-2005 The Regents of The University of Michigan
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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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* Authors: Nathan Binkert
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* Steve Reinhardt
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* Brandon Potter
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*/
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#ifndef __PROCESS_HH__
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#define __PROCESS_HH__
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#include <inttypes.h>
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#include <map>
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#include <string>
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#include <vector>
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#include "arch/registers.hh"
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#include "base/statistics.hh"
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#include "base/types.hh"
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#include "config/the_isa.hh"
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#include "mem/se_translating_port_proxy.hh"
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#include "sim/fd_array.hh"
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#include "sim/fd_entry.hh"
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#include "sim/mem_state.hh"
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#include "sim/sim_object.hh"
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struct ProcessParams;
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class EmulatedDriver;
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class ObjectFile;
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class PageTableBase;
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class SyscallDesc;
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class SyscallReturn;
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class System;
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class ThreadContext;
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class Process : public SimObject
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{
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public:
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Process(ProcessParams *params, ObjectFile *obj_file);
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void serialize(CheckpointOut &cp) const override;
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void unserialize(CheckpointIn &cp) override;
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void initState() override;
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DrainState drain() override;
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void syscall(int64_t callnum, ThreadContext *tc, Fault *fault);
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virtual TheISA::IntReg getSyscallArg(ThreadContext *tc, int &i) = 0;
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virtual TheISA::IntReg getSyscallArg(ThreadContext *tc, int &i, int width);
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virtual void setSyscallArg(ThreadContext *tc, int i,
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TheISA::IntReg val) = 0;
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virtual void setSyscallReturn(ThreadContext *tc,
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SyscallReturn return_value) = 0;
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virtual SyscallDesc *getDesc(int callnum) = 0;
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inline uint64_t uid() { return _uid; }
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inline uint64_t euid() { return _euid; }
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inline uint64_t gid() { return _gid; }
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inline uint64_t egid() { return _egid; }
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inline uint64_t pid() { return _pid; }
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inline uint64_t ppid() { return _ppid; }
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inline uint64_t pgid() { return _pgid; }
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inline uint64_t tgid() { return _tgid; }
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inline void setpgid(uint64_t pgid) { _pgid = pgid; }
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const char *progName() const { return executable.c_str(); }
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std::string fullPath(const std::string &filename);
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std::string getcwd() const { return cwd; }
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/**
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* Find an emulated device driver.
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*
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* @param filename Name of the device (under /dev)
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* @return Pointer to driver object if found, else NULL
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*/
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EmulatedDriver *findDriver(std::string filename);
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// This function acts as a callback to update the bias value in
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// the object file because the parameters needed to calculate the
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// bias are not available when the object file is created.
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void updateBias();
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Addr getBias();
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Addr getStartPC();
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ObjectFile *getInterpreter();
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// override of virtual SimObject method: register statistics
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void regStats() override;
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void allocateMem(Addr vaddr, int64_t size, bool clobber = false);
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/// Attempt to fix up a fault at vaddr by allocating a page on the stack.
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/// @return Whether the fault has been fixed.
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bool fixupStackFault(Addr vaddr);
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// After getting registered with system object, tell process which
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// system-wide context id it is assigned.
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void
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assignThreadContext(ContextID context_id)
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{
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contextIds.push_back(context_id);
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}
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// Find a free context to use
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ThreadContext *findFreeContext();
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/**
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* After delegating a thread context to a child process
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* no longer should relate to the ThreadContext
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*/
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void revokeThreadContext(int context_id);
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/**
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* Does mmap region grow upward or downward from mmapEnd? Most
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* platforms grow downward, but a few (such as Alpha) grow upward
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* instead, so they can override this method to return false.
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*/
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virtual bool mmapGrowsDown() const { return true; }
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/**
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* Maps a contiguous range of virtual addresses in this process's
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* address space to a contiguous range of physical addresses.
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* This function exists primarily to expose the map operation to
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* python, so that configuration scripts can set up mappings in SE mode.
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*
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* @param vaddr The starting virtual address of the range.
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* @param paddr The starting physical address of the range.
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* @param size The length of the range in bytes.
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* @param cacheable Specifies whether accesses are cacheable.
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* @return True if the map operation was successful. (At this
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* point in time, the map operation always succeeds.)
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*/
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bool map(Addr vaddr, Addr paddr, int size, bool cacheable = true);
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void replicatePage(Addr vaddr, Addr new_paddr, ThreadContext *old_tc,
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ThreadContext *new_tc, bool alloc_page);
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void clone(ThreadContext *old_tc, ThreadContext *new_tc, Process *new_p,
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TheISA::IntReg flags);
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// thread contexts associated with this process
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std::vector<ContextID> contextIds;
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// system object which owns this process
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System *system;
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Stats::Scalar numSyscalls; // track how many system calls are executed
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bool useArchPT; // flag for using architecture specific page table
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bool kvmInSE; // running KVM requires special initialization
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PageTableBase* pTable;
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SETranslatingPortProxy initVirtMem; // memory proxy for initial image load
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ObjectFile *objFile;
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std::vector<std::string> argv;
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std::vector<std::string> envp;
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std::string cwd;
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std::string executable;
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// Id of the owner of the process
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uint64_t _uid;
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uint64_t _euid;
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uint64_t _gid;
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uint64_t _egid;
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// pid of the process and it's parent
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uint64_t _pid;
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uint64_t _ppid;
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uint64_t _pgid;
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uint64_t _tgid;
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// Emulated drivers available to this process
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std::vector<EmulatedDriver *> drivers;
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std::shared_ptr<FDArray> fds;
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bool *exitGroup;
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std::shared_ptr<MemState> memState;
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/**
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* Calls a futex wakeup at the address specified by this pointer when
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* this process exits.
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*/
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uint64_t childClearTID;
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// Process was forked with SIGCHLD set.
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bool *sigchld;
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};
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#endif // __PROCESS_HH__
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