248 lines
7.6 KiB
C++
248 lines
7.6 KiB
C++
/*
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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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*/
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#ifndef __PROCESS_HH__
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#define __PROCESS_HH__
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//
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// The purpose of this code is to fake the loader & syscall mechanism
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// when there's no OS: thus there's no reason to use it in FULL_SYSTEM
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// mode when we do have an OS.
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//
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#include "config/full_system.hh"
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#if !FULL_SYSTEM
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#include <vector>
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#include "base/statistics.hh"
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#include "sim/sim_object.hh"
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class ThreadContext;
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class SyscallDesc;
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class PageTable;
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class TranslatingPort;
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class System;
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void
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copyStringArray(std::vector<std::string> &strings, Addr array_ptr,
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Addr data_ptr, TranslatingPort* memPort);
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class Process : public SimObject
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{
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public:
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/// Pointer to object representing the system this process is
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/// running on.
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System *system;
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// have we initialized a thread context from this process? If
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// yes, subsequent contexts are assumed to be for dynamically
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// created threads and are not initialized.
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bool initialContextLoaded;
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// thread contexts associated with this process
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std::vector<ThreadContext *> threadContexts;
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// number of CPUs (esxec contexts, really) assigned to this process.
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unsigned int numCpus() { return threadContexts.size(); }
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// record of blocked context
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struct WaitRec
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{
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Addr waitChan;
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ThreadContext *waitingContext;
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WaitRec(Addr chan, ThreadContext *ctx)
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: waitChan(chan), waitingContext(ctx)
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{ }
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};
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// list of all blocked contexts
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std::list<WaitRec> waitList;
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Addr brk_point; // top of the data segment
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Addr stack_base; // stack segment base (highest address)
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unsigned stack_size; // initial stack size
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Addr stack_min; // lowest address accessed on the stack
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// addr to use for next stack region (for multithreaded apps)
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Addr next_thread_stack_base;
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// Base of region for mmaps (when user doesn't specify an address).
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Addr mmap_start;
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Addr mmap_end;
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// Base of region for nxm data
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Addr nxm_start;
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Addr nxm_end;
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std::string prog_fname; // file name
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Stats::Scalar<> num_syscalls; // number of syscalls executed
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protected:
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// constructor
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Process(const std::string &nm,
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System *_system,
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int stdin_fd, // initial I/O descriptors
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int stdout_fd,
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int stderr_fd);
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// post initialization startup
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virtual void startup();
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protected:
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/// Memory object for initialization (image loading)
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TranslatingPort *initVirtMem;
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public:
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PageTable *pTable;
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private:
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// file descriptor remapping support
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static const int MAX_FD = 256; // max legal fd value
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int fd_map[MAX_FD+1];
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public:
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// static helper functions to generate file descriptors for constructor
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static int openInputFile(const std::string &filename);
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static int openOutputFile(const std::string &filename);
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// override of virtual SimObject method: register statistics
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virtual void regStats();
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// register a thread context for this process.
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// returns tc's cpu number (index into threadContexts[])
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int registerThreadContext(ThreadContext *tc);
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void replaceThreadContext(ThreadContext *tc, int tcIndex);
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// map simulator fd sim_fd to target fd tgt_fd
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void dup_fd(int sim_fd, int tgt_fd);
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// generate new target fd for sim_fd
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int alloc_fd(int sim_fd);
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// free target fd (e.g., after close)
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void free_fd(int tgt_fd);
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// look up simulator fd for given target fd
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int sim_fd(int tgt_fd);
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virtual void syscall(int64_t callnum, ThreadContext *tc) = 0;
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void serialize(std::ostream &os);
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void unserialize(Checkpoint *cp, const std::string §ion);
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};
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//
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// "Live" process with system calls redirected to host system
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//
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class ObjectFile;
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class LiveProcess : public Process
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{
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protected:
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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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LiveProcess(const std::string &nm, ObjectFile *objFile,
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System *_system, int stdin_fd, int stdout_fd, int stderr_fd,
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std::vector<std::string> &argv,
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std::vector<std::string> &envp,
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const std::string &cwd,
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uint64_t _uid, uint64_t _euid,
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uint64_t _gid, uint64_t _egid,
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uint64_t _pid, uint64_t _ppid);
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virtual void argsInit(int intSize, int pageSize);
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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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public:
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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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std::string
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fullPath(const std::string &filename)
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{
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if (filename[0] == '/' || cwd.empty())
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return filename;
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std::string full = cwd;
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if (cwd[cwd.size() - 1] != '/')
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full += '/';
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return full + filename;
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}
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virtual void syscall(int64_t callnum, ThreadContext *tc);
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virtual SyscallDesc* getDesc(int callnum) = 0;
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// this function is used to create the LiveProcess object, since
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// we can't tell which subclass of LiveProcess to use until we
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// open and look at the object file.
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static LiveProcess *create(const std::string &nm,
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System *_system,
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int stdin_fd, int stdout_fd, int stderr_fd,
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std::string executable,
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std::vector<std::string> &argv,
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std::vector<std::string> &envp,
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const std::string &cwd,
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uint64_t _uid, uint64_t _euid,
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uint64_t _gid, uint64_t _egid,
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uint64_t _pid, uint64_t _ppid);
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};
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#endif // !FULL_SYSTEM
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#endif // __PROCESS_HH__
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