1/* 2 * Copyright (c) 2014-2016 Advanced Micro Devices, Inc. 3 * Copyright (c) 2001-2005 The Regents of The University of Michigan 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are 8 * met: redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer; 10 * redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution; 13 * neither the name of the copyright holders nor the names of its 14 * contributors may be used to endorse or promote products derived from 15 * this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * Authors: Nathan Binkert 30 * Steve Reinhardt 31 * Brandon Potter 32 */ 33 34#ifndef __PROCESS_HH__ 35#define __PROCESS_HH__ 36 37#include <inttypes.h> 38 39#include <map> 40#include <string> 41#include <vector> 42 43#include "arch/registers.hh" 44#include "base/statistics.hh" 45#include "base/types.hh" 46#include "config/the_isa.hh" 47#include "mem/se_translating_port_proxy.hh" 48#include "sim/fd_array.hh" 49#include "sim/fd_entry.hh" 50#include "sim/mem_state.hh" 51#include "sim/sim_object.hh" 52 53struct ProcessParams; 54 55class EmulatedDriver; 56class ObjectFile; 57class PageTableBase; 58class SyscallDesc; 59class SyscallReturn; 60class System; 61class ThreadContext; 62 63class Process : public SimObject 64{ 65 public:
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66 Process(ProcessParams *params, ObjectFile *obj_file);
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66 Process(ProcessParams *params, PageTableBase *pTable, 67 ObjectFile *obj_file); |
68 69 void serialize(CheckpointOut &cp) const override; 70 void unserialize(CheckpointIn &cp) override; 71 72 void initState() override; 73 DrainState drain() override; 74 75 virtual void syscall(int64_t callnum, ThreadContext *tc, Fault *fault); 76 virtual TheISA::IntReg getSyscallArg(ThreadContext *tc, int &i) = 0; 77 virtual TheISA::IntReg getSyscallArg(ThreadContext *tc, int &i, int width); 78 virtual void setSyscallArg(ThreadContext *tc, int i, 79 TheISA::IntReg val) = 0; 80 virtual void setSyscallReturn(ThreadContext *tc, 81 SyscallReturn return_value) = 0; 82 virtual SyscallDesc *getDesc(int callnum) = 0; 83 84 inline uint64_t uid() { return _uid; } 85 inline uint64_t euid() { return _euid; } 86 inline uint64_t gid() { return _gid; } 87 inline uint64_t egid() { return _egid; } 88 inline uint64_t pid() { return _pid; } 89 inline uint64_t ppid() { return _ppid; } 90 inline uint64_t pgid() { return _pgid; } 91 inline uint64_t tgid() { return _tgid; } 92 inline void setpgid(uint64_t pgid) { _pgid = pgid; } 93 94 const char *progName() const { return executable.c_str(); } 95 std::string fullPath(const std::string &filename); 96 std::string getcwd() const { return cwd; } 97 98 /** 99 * Find an emulated device driver. 100 * 101 * @param filename Name of the device (under /dev) 102 * @return Pointer to driver object if found, else nullptr 103 */ 104 EmulatedDriver *findDriver(std::string filename); 105 106 // This function acts as a callback to update the bias value in 107 // the object file because the parameters needed to calculate the 108 // bias are not available when the object file is created. 109 void updateBias(); 110 Addr getBias(); 111 Addr getStartPC(); 112 ObjectFile *getInterpreter(); 113 114 // override of virtual SimObject method: register statistics 115 void regStats() override; 116 117 void allocateMem(Addr vaddr, int64_t size, bool clobber = false); 118 119 /// Attempt to fix up a fault at vaddr by allocating a page on the stack. 120 /// @return Whether the fault has been fixed. 121 bool fixupStackFault(Addr vaddr); 122 123 // After getting registered with system object, tell process which 124 // system-wide context id it is assigned. 125 void 126 assignThreadContext(ContextID context_id) 127 { 128 contextIds.push_back(context_id); 129 } 130 131 // Find a free context to use 132 ThreadContext *findFreeContext(); 133 134 /** 135 * After delegating a thread context to a child process 136 * no longer should relate to the ThreadContext 137 */ 138 void revokeThreadContext(int context_id); 139 140 /** 141 * Does mmap region grow upward or downward from mmapEnd? Most 142 * platforms grow downward, but a few (such as Alpha) grow upward 143 * instead, so they can override this method to return false. 144 */ 145 virtual bool mmapGrowsDown() const { return true; } 146 147 /** 148 * Maps a contiguous range of virtual addresses in this process's 149 * address space to a contiguous range of physical addresses. 150 * This function exists primarily to expose the map operation to 151 * python, so that configuration scripts can set up mappings in SE mode. 152 * 153 * @param vaddr The starting virtual address of the range. 154 * @param paddr The starting physical address of the range. 155 * @param size The length of the range in bytes. 156 * @param cacheable Specifies whether accesses are cacheable. 157 * @return True if the map operation was successful. (At this 158 * point in time, the map operation always succeeds.) 159 */ 160 bool map(Addr vaddr, Addr paddr, int size, bool cacheable = true); 161 162 void replicatePage(Addr vaddr, Addr new_paddr, ThreadContext *old_tc, 163 ThreadContext *new_tc, bool alloc_page); 164 165 virtual void clone(ThreadContext *old_tc, ThreadContext *new_tc, 166 Process *new_p, TheISA::IntReg flags); 167 168 // thread contexts associated with this process 169 std::vector<ContextID> contextIds; 170 171 // system object which owns this process 172 System *system; 173 174 Stats::Scalar numSyscalls; // track how many system calls are executed 175 176 bool useArchPT; // flag for using architecture specific page table 177 bool kvmInSE; // running KVM requires special initialization 178 179 PageTableBase* pTable; 180 181 SETranslatingPortProxy initVirtMem; // memory proxy for initial image load 182 183 ObjectFile *objFile; 184 std::vector<std::string> argv; 185 std::vector<std::string> envp; 186 std::string cwd; 187 std::string executable; 188 189 // Id of the owner of the process 190 uint64_t _uid; 191 uint64_t _euid; 192 uint64_t _gid; 193 uint64_t _egid; 194 195 // pid of the process and it's parent 196 uint64_t _pid; 197 uint64_t _ppid; 198 uint64_t _pgid; 199 uint64_t _tgid; 200 201 // Emulated drivers available to this process 202 std::vector<EmulatedDriver *> drivers; 203 204 std::shared_ptr<FDArray> fds; 205 206 bool *exitGroup; 207 std::shared_ptr<MemState> memState; 208 209 /** 210 * Calls a futex wakeup at the address specified by this pointer when 211 * this process exits. 212 */ 213 uint64_t childClearTID; 214 215 // Process was forked with SIGCHLD set. 216 bool *sigchld; 217}; 218 219#endif // __PROCESS_HH__
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