process.cc revision 13995
12SN/A/* 211856Sbrandon.potter@amd.com * Copyright (c) 2014-2016 Advanced Micro Devices, Inc. 38852Sandreas.hansson@arm.com * Copyright (c) 2012 ARM Limited 48852Sandreas.hansson@arm.com * All rights reserved 58852Sandreas.hansson@arm.com * 68852Sandreas.hansson@arm.com * The license below extends only to copyright in the software and shall 78852Sandreas.hansson@arm.com * not be construed as granting a license to any other intellectual 88852Sandreas.hansson@arm.com * property including but not limited to intellectual property relating 98852Sandreas.hansson@arm.com * to a hardware implementation of the functionality of the software 108852Sandreas.hansson@arm.com * licensed hereunder. You may use the software subject to the license 118852Sandreas.hansson@arm.com * terms below provided that you ensure that this notice is replicated 128852Sandreas.hansson@arm.com * unmodified and in its entirety in all distributions of the software, 138852Sandreas.hansson@arm.com * modified or unmodified, in source code or in binary form. 148852Sandreas.hansson@arm.com * 151762SN/A * Copyright (c) 2001-2005 The Regents of The University of Michigan 162SN/A * All rights reserved. 172SN/A * 182SN/A * Redistribution and use in source and binary forms, with or without 192SN/A * modification, are permitted provided that the following conditions are 202SN/A * met: redistributions of source code must retain the above copyright 212SN/A * notice, this list of conditions and the following disclaimer; 222SN/A * redistributions in binary form must reproduce the above copyright 232SN/A * notice, this list of conditions and the following disclaimer in the 242SN/A * documentation and/or other materials provided with the distribution; 252SN/A * neither the name of the copyright holders nor the names of its 262SN/A * contributors may be used to endorse or promote products derived from 272SN/A * this software without specific prior written permission. 282SN/A * 292SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 302SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 312SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 322SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 332SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 342SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 352SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 362SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 372SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 382SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 392SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 402665Ssaidi@eecs.umich.edu * 412665Ssaidi@eecs.umich.edu * Authors: Nathan Binkert 422665Ssaidi@eecs.umich.edu * Steve Reinhardt 432665Ssaidi@eecs.umich.edu * Ali Saidi 4411856Sbrandon.potter@amd.com * Brandon Potter 452SN/A */ 462SN/A 4711793Sbrandon.potter@amd.com#include "sim/process.hh" 4811793Sbrandon.potter@amd.com 498229Snate@binkert.org#include <fcntl.h> 502SN/A#include <unistd.h> 516712Snate@binkert.org 5211800Sbrandon.potter@amd.com#include <array> 5313883Sdavid.hashe@amd.com#include <climits> 5411911SBrandon.Potter@amd.com#include <csignal> 5510930Sbrandon.potter@amd.com#include <map> 562SN/A#include <string> 5711800Sbrandon.potter@amd.com#include <vector> 582SN/A 5911793Sbrandon.potter@amd.com#include "base/intmath.hh" 6056SN/A#include "base/loader/object_file.hh" 611158SN/A#include "base/loader/symtab.hh" 62146SN/A#include "base/statistics.hh" 636658Snate@binkert.org#include "config/the_isa.hh" 642680Sktlim@umich.edu#include "cpu/thread_context.hh" 652378SN/A#include "mem/page_table.hh" 668706Sandreas.hansson@arm.com#include "mem/se_translating_port_proxy.hh" 675154Sgblack@eecs.umich.edu#include "params/Process.hh" 6811800Sbrandon.potter@amd.com#include "sim/emul_driver.hh" 6911856Sbrandon.potter@amd.com#include "sim/fd_array.hh" 7011856Sbrandon.potter@amd.com#include "sim/fd_entry.hh" 7113883Sdavid.hashe@amd.com#include "sim/redirect_path.hh" 7211794Sbrandon.potter@amd.com#include "sim/syscall_desc.hh" 732378SN/A#include "sim/system.hh" 742SN/A 752SN/Ausing namespace std; 762107SN/Ausing namespace TheISA; 772SN/A 7813883Sdavid.hashe@amd.comstatic std::string 7913883Sdavid.hashe@amd.comnormalize(std::string& directory) 8013883Sdavid.hashe@amd.com{ 8113883Sdavid.hashe@amd.com if (directory.back() != '/') 8213883Sdavid.hashe@amd.com directory += '/'; 8313883Sdavid.hashe@amd.com return directory; 8413883Sdavid.hashe@amd.com} 8513883Sdavid.hashe@amd.com 8612448Sgabeblack@google.comProcess::Process(ProcessParams *params, EmulationPageTable *pTable, 8712431Sgabeblack@google.com ObjectFile *obj_file) 887532Ssteve.reinhardt@amd.com : SimObject(params), system(params->system), 8910299Salexandru.dutu@amd.com useArchPT(params->useArchPT), 9010554Salexandru.dutu@amd.com kvmInSE(params->kvmInSE), 9113867Salexandru.dutu@amd.com useForClone(false), 9212431Sgabeblack@google.com pTable(pTable), 938852Sandreas.hansson@arm.com initVirtMem(system->getSystemPort(), this, 9410929Sbrandon.potter@amd.com SETranslatingPortProxy::Always), 9511851Sbrandon.potter@amd.com objFile(obj_file), 9613883Sdavid.hashe@amd.com argv(params->cmd), envp(params->env), 9711851Sbrandon.potter@amd.com executable(params->executable), 9813883Sdavid.hashe@amd.com tgtCwd(normalize(params->cwd)), 9913883Sdavid.hashe@amd.com hostCwd(checkPathRedirect(tgtCwd)), 10011801Sbrandon.potter@amd.com _uid(params->uid), _euid(params->euid), 10111801Sbrandon.potter@amd.com _gid(params->gid), _egid(params->egid), 10211851Sbrandon.potter@amd.com _pid(params->pid), _ppid(params->ppid), 10311885Sbrandon.potter@amd.com _pgid(params->pgid), drivers(params->drivers), 10411886Sbrandon.potter@amd.com fds(make_shared<FDArray>(params->input, params->output, params->errout)), 10511886Sbrandon.potter@amd.com childClearTID(0) 1062SN/A{ 10711885Sbrandon.potter@amd.com if (_pid >= System::maxPID) 10811885Sbrandon.potter@amd.com fatal("_pid is too large: %d", _pid); 10911885Sbrandon.potter@amd.com 11011885Sbrandon.potter@amd.com auto ret_pair = system->PIDs.emplace(_pid); 11111885Sbrandon.potter@amd.com if (!ret_pair.second) 11211885Sbrandon.potter@amd.com fatal("_pid %d is already used", _pid); 11311885Sbrandon.potter@amd.com 11411886Sbrandon.potter@amd.com /** 11511886Sbrandon.potter@amd.com * Linux bundles together processes into this concept called a thread 11611886Sbrandon.potter@amd.com * group. The thread group is responsible for recording which processes 11711886Sbrandon.potter@amd.com * behave as threads within a process context. The thread group leader 11811886Sbrandon.potter@amd.com * is the process who's tgid is equal to its pid. Other processes which 11911886Sbrandon.potter@amd.com * belong to the thread group, but do not lead the thread group, are 12011886Sbrandon.potter@amd.com * treated as child threads. These threads are created by the clone system 12111886Sbrandon.potter@amd.com * call with options specified to create threads (differing from the 12211886Sbrandon.potter@amd.com * options used to implement a fork). By default, set up the tgid/pid 12311886Sbrandon.potter@amd.com * with a new, equivalent value. If CLONE_THREAD is specified, patch 12411886Sbrandon.potter@amd.com * the tgid value with the old process' value. 12511886Sbrandon.potter@amd.com */ 12611886Sbrandon.potter@amd.com _tgid = params->pid; 12711886Sbrandon.potter@amd.com 12811886Sbrandon.potter@amd.com exitGroup = new bool(); 12911886Sbrandon.potter@amd.com sigchld = new bool(); 13011886Sbrandon.potter@amd.com 13111851Sbrandon.potter@amd.com if (!debugSymbolTable) { 13211851Sbrandon.potter@amd.com debugSymbolTable = new SymbolTable(); 13311851Sbrandon.potter@amd.com if (!objFile->loadGlobalSymbols(debugSymbolTable) || 13411851Sbrandon.potter@amd.com !objFile->loadLocalSymbols(debugSymbolTable) || 13511851Sbrandon.potter@amd.com !objFile->loadWeakSymbols(debugSymbolTable)) { 13611851Sbrandon.potter@amd.com delete debugSymbolTable; 13711919SBrandon.Potter@amd.com debugSymbolTable = nullptr; 13811851Sbrandon.potter@amd.com } 13911851Sbrandon.potter@amd.com } 1402SN/A} 1412SN/A 1422SN/Avoid 14311886Sbrandon.potter@amd.comProcess::clone(ThreadContext *otc, ThreadContext *ntc, 14413557Sgabeblack@google.com Process *np, RegVal flags) 14511886Sbrandon.potter@amd.com{ 14611920SBrandon.Potter@amd.com#ifndef CLONE_VM 14711920SBrandon.Potter@amd.com#define CLONE_VM 0 14811920SBrandon.Potter@amd.com#endif 14911920SBrandon.Potter@amd.com#ifndef CLONE_FILES 15011920SBrandon.Potter@amd.com#define CLONE_FILES 0 15111920SBrandon.Potter@amd.com#endif 15211920SBrandon.Potter@amd.com#ifndef CLONE_THREAD 15311920SBrandon.Potter@amd.com#define CLONE_THREAD 0 15411920SBrandon.Potter@amd.com#endif 15511886Sbrandon.potter@amd.com if (CLONE_VM & flags) { 15611886Sbrandon.potter@amd.com /** 15711886Sbrandon.potter@amd.com * Share the process memory address space between the new process 15811886Sbrandon.potter@amd.com * and the old process. Changes in one will be visible in the other 15911886Sbrandon.potter@amd.com * due to the pointer use. 16011886Sbrandon.potter@amd.com */ 16111886Sbrandon.potter@amd.com delete np->pTable; 16211886Sbrandon.potter@amd.com np->pTable = pTable; 16311886Sbrandon.potter@amd.com ntc->getMemProxy().setPageTable(np->pTable); 16411886Sbrandon.potter@amd.com 16511886Sbrandon.potter@amd.com np->memState = memState; 16611886Sbrandon.potter@amd.com } else { 16711886Sbrandon.potter@amd.com /** 16811886Sbrandon.potter@amd.com * Duplicate the process memory address space. The state needs to be 16911886Sbrandon.potter@amd.com * copied over (rather than using pointers to share everything). 17011886Sbrandon.potter@amd.com */ 17111886Sbrandon.potter@amd.com typedef std::vector<pair<Addr,Addr>> MapVec; 17211886Sbrandon.potter@amd.com MapVec mappings; 17311886Sbrandon.potter@amd.com pTable->getMappings(&mappings); 17411886Sbrandon.potter@amd.com 17511886Sbrandon.potter@amd.com for (auto map : mappings) { 17611886Sbrandon.potter@amd.com Addr paddr, vaddr = map.first; 17711886Sbrandon.potter@amd.com bool alloc_page = !(np->pTable->translate(vaddr, paddr)); 17811886Sbrandon.potter@amd.com np->replicatePage(vaddr, paddr, otc, ntc, alloc_page); 17911886Sbrandon.potter@amd.com } 18011886Sbrandon.potter@amd.com 18111886Sbrandon.potter@amd.com *np->memState = *memState; 18211886Sbrandon.potter@amd.com } 18311886Sbrandon.potter@amd.com 18411886Sbrandon.potter@amd.com if (CLONE_FILES & flags) { 18511886Sbrandon.potter@amd.com /** 18611886Sbrandon.potter@amd.com * The parent and child file descriptors are shared because the 18711886Sbrandon.potter@amd.com * two FDArray pointers are pointing to the same FDArray. Opening 18811886Sbrandon.potter@amd.com * and closing file descriptors will be visible to both processes. 18911886Sbrandon.potter@amd.com */ 19011886Sbrandon.potter@amd.com np->fds = fds; 19111886Sbrandon.potter@amd.com } else { 19211886Sbrandon.potter@amd.com /** 19311886Sbrandon.potter@amd.com * Copy the file descriptors from the old process into the new 19411886Sbrandon.potter@amd.com * child process. The file descriptors entry can be opened and 19511886Sbrandon.potter@amd.com * closed independently of the other process being considered. The 19611886Sbrandon.potter@amd.com * host file descriptors are also dup'd so that the flags for the 19711886Sbrandon.potter@amd.com * host file descriptor is independent of the other process. 19811886Sbrandon.potter@amd.com */ 19911886Sbrandon.potter@amd.com for (int tgt_fd = 0; tgt_fd < fds->getSize(); tgt_fd++) { 20011886Sbrandon.potter@amd.com std::shared_ptr<FDArray> nfds = np->fds; 20111886Sbrandon.potter@amd.com std::shared_ptr<FDEntry> this_fde = (*fds)[tgt_fd]; 20211886Sbrandon.potter@amd.com if (!this_fde) { 20311886Sbrandon.potter@amd.com nfds->setFDEntry(tgt_fd, nullptr); 20411886Sbrandon.potter@amd.com continue; 20511886Sbrandon.potter@amd.com } 20611886Sbrandon.potter@amd.com nfds->setFDEntry(tgt_fd, this_fde->clone()); 20711886Sbrandon.potter@amd.com 20811886Sbrandon.potter@amd.com auto this_hbfd = std::dynamic_pointer_cast<HBFDEntry>(this_fde); 20911886Sbrandon.potter@amd.com if (!this_hbfd) 21011886Sbrandon.potter@amd.com continue; 21111886Sbrandon.potter@amd.com 21211886Sbrandon.potter@amd.com int this_sim_fd = this_hbfd->getSimFD(); 21311886Sbrandon.potter@amd.com if (this_sim_fd <= 2) 21411886Sbrandon.potter@amd.com continue; 21511886Sbrandon.potter@amd.com 21611886Sbrandon.potter@amd.com int np_sim_fd = dup(this_sim_fd); 21711886Sbrandon.potter@amd.com assert(np_sim_fd != -1); 21811886Sbrandon.potter@amd.com 21911886Sbrandon.potter@amd.com auto nhbfd = std::dynamic_pointer_cast<HBFDEntry>((*nfds)[tgt_fd]); 22011886Sbrandon.potter@amd.com nhbfd->setSimFD(np_sim_fd); 22111886Sbrandon.potter@amd.com } 22211886Sbrandon.potter@amd.com } 22311886Sbrandon.potter@amd.com 22411886Sbrandon.potter@amd.com if (CLONE_THREAD & flags) { 22511886Sbrandon.potter@amd.com np->_tgid = _tgid; 22611886Sbrandon.potter@amd.com delete np->exitGroup; 22711886Sbrandon.potter@amd.com np->exitGroup = exitGroup; 22811886Sbrandon.potter@amd.com } 22911886Sbrandon.potter@amd.com 23011886Sbrandon.potter@amd.com np->argv.insert(np->argv.end(), argv.begin(), argv.end()); 23111886Sbrandon.potter@amd.com np->envp.insert(np->envp.end(), envp.begin(), envp.end()); 23211886Sbrandon.potter@amd.com} 23311886Sbrandon.potter@amd.com 23411886Sbrandon.potter@amd.comvoid 2352SN/AProcess::regStats() 2362SN/A{ 23711522Sstephan.diestelhorst@arm.com SimObject::regStats(); 23811522Sstephan.diestelhorst@arm.com 239729SN/A using namespace Stats; 2402SN/A 24111886Sbrandon.potter@amd.com numSyscalls 24211886Sbrandon.potter@amd.com .name(name() + ".numSyscalls") 2432SN/A .desc("Number of system calls") 2442SN/A ; 2452SN/A} 2462SN/A 2475713Shsul@eecs.umich.eduThreadContext * 2485713Shsul@eecs.umich.eduProcess::findFreeContext() 2492SN/A{ 25011886Sbrandon.potter@amd.com for (auto &it : system->threadContexts) { 25111886Sbrandon.potter@amd.com if (ThreadContext::Halted == it->status()) 25211886Sbrandon.potter@amd.com return it; 2535512SMichael.Adler@intel.com } 25411919SBrandon.Potter@amd.com return nullptr; 2552SN/A} 2562SN/A 2571395SN/Avoid 25811886Sbrandon.potter@amd.comProcess::revokeThreadContext(int context_id) 25911886Sbrandon.potter@amd.com{ 26011886Sbrandon.potter@amd.com std::vector<ContextID>::iterator it; 26111886Sbrandon.potter@amd.com for (it = contextIds.begin(); it != contextIds.end(); it++) { 26211886Sbrandon.potter@amd.com if (*it == context_id) { 26311886Sbrandon.potter@amd.com contextIds.erase(it); 26411886Sbrandon.potter@amd.com return; 26511886Sbrandon.potter@amd.com } 26611886Sbrandon.potter@amd.com } 26711886Sbrandon.potter@amd.com warn("Unable to find thread context to revoke"); 26811886Sbrandon.potter@amd.com} 26911886Sbrandon.potter@amd.com 27011886Sbrandon.potter@amd.comvoid 2717532Ssteve.reinhardt@amd.comProcess::initState() 2721395SN/A{ 2735713Shsul@eecs.umich.edu if (contextIds.empty()) 2745713Shsul@eecs.umich.edu fatal("Process %s is not associated with any HW contexts!\n", name()); 2752378SN/A 2762680Sktlim@umich.edu // first thread context for this process... initialize & enable 2775713Shsul@eecs.umich.edu ThreadContext *tc = system->getThreadContext(contextIds[0]); 2781395SN/A 2791634SN/A // mark this context as active so it will start ticking. 28010407Smitch.hayenga@arm.com tc->activate(); 28110298Salexandru.dutu@amd.com 28210298Salexandru.dutu@amd.com pTable->initState(tc); 2831395SN/A} 2842SN/A 28510913Sandreas.sandberg@arm.comDrainState 28610913Sandreas.sandberg@arm.comProcess::drain() 28710905Sandreas.sandberg@arm.com{ 28811856Sbrandon.potter@amd.com fds->updateFileOffsets(); 28910913Sandreas.sandberg@arm.com return DrainState::Drained; 29010905Sandreas.sandberg@arm.com} 29110905Sandreas.sandberg@arm.com 2928601Ssteve.reinhardt@amd.comvoid 2938601Ssteve.reinhardt@amd.comProcess::allocateMem(Addr vaddr, int64_t size, bool clobber) 2948601Ssteve.reinhardt@amd.com{ 29510318Sandreas.hansson@arm.com int npages = divCeil(size, (int64_t)PageBytes); 2968601Ssteve.reinhardt@amd.com Addr paddr = system->allocPhysPages(npages); 29711294Sandreas.hansson@arm.com pTable->map(vaddr, paddr, size, 29812448Sgabeblack@google.com clobber ? EmulationPageTable::Clobber : 29912460Sgabeblack@google.com EmulationPageTable::MappingFlags(0)); 3008601Ssteve.reinhardt@amd.com} 3018601Ssteve.reinhardt@amd.com 30211886Sbrandon.potter@amd.comvoid 30311886Sbrandon.potter@amd.comProcess::replicatePage(Addr vaddr, Addr new_paddr, ThreadContext *old_tc, 30411886Sbrandon.potter@amd.com ThreadContext *new_tc, bool allocate_page) 30511886Sbrandon.potter@amd.com{ 30611886Sbrandon.potter@amd.com if (allocate_page) 30711886Sbrandon.potter@amd.com new_paddr = system->allocPhysPages(1); 30811886Sbrandon.potter@amd.com 30911886Sbrandon.potter@amd.com // Read from old physical page. 31011886Sbrandon.potter@amd.com uint8_t *buf_p = new uint8_t[PageBytes]; 31111886Sbrandon.potter@amd.com old_tc->getMemProxy().readBlob(vaddr, buf_p, PageBytes); 31211886Sbrandon.potter@amd.com 31311886Sbrandon.potter@amd.com // Create new mapping in process address space by clobbering existing 31411886Sbrandon.potter@amd.com // mapping (if any existed) and then write to the new physical page. 31511886Sbrandon.potter@amd.com bool clobber = true; 31611886Sbrandon.potter@amd.com pTable->map(vaddr, new_paddr, PageBytes, clobber); 31711886Sbrandon.potter@amd.com new_tc->getMemProxy().writeBlob(vaddr, buf_p, PageBytes); 31811886Sbrandon.potter@amd.com delete[] buf_p; 31911886Sbrandon.potter@amd.com} 32011886Sbrandon.potter@amd.com 3214434Ssaidi@eecs.umich.edubool 3228539Sgblack@eecs.umich.eduProcess::fixupStackFault(Addr vaddr) 3234434Ssaidi@eecs.umich.edu{ 32411905SBrandon.Potter@amd.com Addr stack_min = memState->getStackMin(); 32511905SBrandon.Potter@amd.com Addr stack_base = memState->getStackBase(); 32611905SBrandon.Potter@amd.com Addr max_stack_size = memState->getMaxStackSize(); 32711905SBrandon.Potter@amd.com 3288539Sgblack@eecs.umich.edu // Check if this is already on the stack and there's just no page there 3298539Sgblack@eecs.umich.edu // yet. 33011905SBrandon.Potter@amd.com if (vaddr >= stack_min && vaddr < stack_base) { 33110318Sandreas.hansson@arm.com allocateMem(roundDown(vaddr, PageBytes), PageBytes); 3324434Ssaidi@eecs.umich.edu return true; 3334434Ssaidi@eecs.umich.edu } 3344434Ssaidi@eecs.umich.edu 3358539Sgblack@eecs.umich.edu // We've accessed the next page of the stack, so extend it to include 3368539Sgblack@eecs.umich.edu // this address. 33711905SBrandon.Potter@amd.com if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) { 33811905SBrandon.Potter@amd.com while (vaddr < stack_min) { 33911905SBrandon.Potter@amd.com stack_min -= TheISA::PageBytes; 34011905SBrandon.Potter@amd.com if (stack_base - stack_min > max_stack_size) 3415154Sgblack@eecs.umich.edu fatal("Maximum stack size exceeded\n"); 34211905SBrandon.Potter@amd.com allocateMem(stack_min, TheISA::PageBytes); 3435823Ssaidi@eecs.umich.edu inform("Increasing stack size by one page."); 34411906SBrandon.Potter@amd.com } 34511905SBrandon.Potter@amd.com memState->setStackMin(stack_min); 3464434Ssaidi@eecs.umich.edu return true; 3474434Ssaidi@eecs.umich.edu } 3484434Ssaidi@eecs.umich.edu return false; 3494434Ssaidi@eecs.umich.edu} 3504434Ssaidi@eecs.umich.edu 3515282Srstrong@cs.ucsd.eduvoid 35210905Sandreas.sandberg@arm.comProcess::serialize(CheckpointOut &cp) const 3533311Ssaidi@eecs.umich.edu{ 35412283Saustinharris@utexas.edu memState->serialize(cp); 35510905Sandreas.sandberg@arm.com pTable->serialize(cp); 35611856Sbrandon.potter@amd.com /** 35711856Sbrandon.potter@amd.com * Checkpoints for file descriptors currently do not work. Need to 35811856Sbrandon.potter@amd.com * come back and fix them at a later date. 35911856Sbrandon.potter@amd.com */ 36011856Sbrandon.potter@amd.com 36111856Sbrandon.potter@amd.com warn("Checkpoints for file descriptors currently do not work."); 3623311Ssaidi@eecs.umich.edu} 3633311Ssaidi@eecs.umich.edu 3643311Ssaidi@eecs.umich.eduvoid 36510905Sandreas.sandberg@arm.comProcess::unserialize(CheckpointIn &cp) 3663311Ssaidi@eecs.umich.edu{ 36712283Saustinharris@utexas.edu memState->unserialize(cp); 36810905Sandreas.sandberg@arm.com pTable->unserialize(cp); 36911856Sbrandon.potter@amd.com /** 37011856Sbrandon.potter@amd.com * Checkpoints for file descriptors currently do not work. Need to 37111856Sbrandon.potter@amd.com * come back and fix them at a later date. 37211856Sbrandon.potter@amd.com */ 37311856Sbrandon.potter@amd.com warn("Checkpoints for file descriptors currently do not work."); 3746820SLisa.Hsu@amd.com // The above returns a bool so that you could do something if you don't 3756820SLisa.Hsu@amd.com // find the param in the checkpoint if you wanted to, like set a default 37610930Sbrandon.potter@amd.com // but in this case we'll just stick with the instantiated value if not 37710929Sbrandon.potter@amd.com // found. 3783311Ssaidi@eecs.umich.edu} 3792SN/A 3809110Ssteve.reinhardt@amd.combool 38110558Salexandru.dutu@amd.comProcess::map(Addr vaddr, Addr paddr, int size, bool cacheable) 3829110Ssteve.reinhardt@amd.com{ 38310558Salexandru.dutu@amd.com pTable->map(vaddr, paddr, size, 38412460Sgabeblack@google.com cacheable ? EmulationPageTable::MappingFlags(0) : 38512448Sgabeblack@google.com EmulationPageTable::Uncacheable); 3869110Ssteve.reinhardt@amd.com return true; 3879110Ssteve.reinhardt@amd.com} 3889110Ssteve.reinhardt@amd.com 3892378SN/Avoid 39011877Sbrandon.potter@amd.comProcess::syscall(int64_t callnum, ThreadContext *tc, Fault *fault) 3912093SN/A{ 39211886Sbrandon.potter@amd.com numSyscalls++; 3932093SN/A 3942093SN/A SyscallDesc *desc = getDesc(callnum); 39511919SBrandon.Potter@amd.com if (desc == nullptr) 3962093SN/A fatal("Syscall %d out of range", callnum); 3972093SN/A 39813995Sbrandon.potter@amd.com desc->doSyscall(callnum, tc, fault); 3992093SN/A} 4002SN/A 40113557Sgabeblack@google.comRegVal 40211851Sbrandon.potter@amd.comProcess::getSyscallArg(ThreadContext *tc, int &i, int width) 4036701Sgblack@eecs.umich.edu{ 4046701Sgblack@eecs.umich.edu return getSyscallArg(tc, i); 4056701Sgblack@eecs.umich.edu} 4066701Sgblack@eecs.umich.edu 40710496Ssteve.reinhardt@amd.comEmulatedDriver * 40811851Sbrandon.potter@amd.comProcess::findDriver(std::string filename) 40910496Ssteve.reinhardt@amd.com{ 41010496Ssteve.reinhardt@amd.com for (EmulatedDriver *d : drivers) { 41110496Ssteve.reinhardt@amd.com if (d->match(filename)) 41210496Ssteve.reinhardt@amd.com return d; 41310496Ssteve.reinhardt@amd.com } 41410496Ssteve.reinhardt@amd.com 41511919SBrandon.Potter@amd.com return nullptr; 41610496Ssteve.reinhardt@amd.com} 41710496Ssteve.reinhardt@amd.com 41813883Sdavid.hashe@amd.comstd::string 41913883Sdavid.hashe@amd.comProcess::checkPathRedirect(const std::string &filename) 42013883Sdavid.hashe@amd.com{ 42113906Sbrandon.potter@amd.com // If the input parameter contains a relative path, convert it. 42213906Sbrandon.potter@amd.com // The target version of the current working directory is fine since 42313906Sbrandon.potter@amd.com // we immediately convert it using redirect paths into a host version. 42413906Sbrandon.potter@amd.com auto abs_path = absolutePath(filename, false); 42513883Sdavid.hashe@amd.com 42613883Sdavid.hashe@amd.com for (auto path : system->redirectPaths) { 42713883Sdavid.hashe@amd.com // Search through the redirect paths to see if a starting substring of 42813883Sdavid.hashe@amd.com // our path falls into any buckets which need to redirected. 42913906Sbrandon.potter@amd.com if (startswith(abs_path, path->appPath())) { 43013906Sbrandon.potter@amd.com std::string tail = abs_path.substr(path->appPath().size()); 43113883Sdavid.hashe@amd.com 43213883Sdavid.hashe@amd.com // If this path needs to be redirected, search through a list 43313883Sdavid.hashe@amd.com // of targets to see if we can match a valid file (or directory). 43413883Sdavid.hashe@amd.com for (auto host_path : path->hostPaths()) { 43513883Sdavid.hashe@amd.com if (access((host_path + tail).c_str(), R_OK) == 0) { 43613883Sdavid.hashe@amd.com // Return the valid match. 43713883Sdavid.hashe@amd.com return host_path + tail; 43813883Sdavid.hashe@amd.com } 43913883Sdavid.hashe@amd.com } 44013883Sdavid.hashe@amd.com // The path needs to be redirected, but the file or directory 44113883Sdavid.hashe@amd.com // does not exist on the host filesystem. Return the first 44213883Sdavid.hashe@amd.com // host path as a default. 44313883Sdavid.hashe@amd.com return path->hostPaths()[0] + tail; 44413883Sdavid.hashe@amd.com } 44513883Sdavid.hashe@amd.com } 44613883Sdavid.hashe@amd.com 44713883Sdavid.hashe@amd.com // The path does not need to be redirected. 44813906Sbrandon.potter@amd.com return abs_path; 44913883Sdavid.hashe@amd.com} 45013883Sdavid.hashe@amd.com 45111389Sbrandon.potter@amd.comvoid 45211851Sbrandon.potter@amd.comProcess::updateBias() 45311389Sbrandon.potter@amd.com{ 45411389Sbrandon.potter@amd.com ObjectFile *interp = objFile->getInterpreter(); 45511389Sbrandon.potter@amd.com 45611389Sbrandon.potter@amd.com if (!interp || !interp->relocatable()) 45711389Sbrandon.potter@amd.com return; 45811389Sbrandon.potter@amd.com 45911389Sbrandon.potter@amd.com // Determine how large the interpreters footprint will be in the process 46011389Sbrandon.potter@amd.com // address space. 46111389Sbrandon.potter@amd.com Addr interp_mapsize = roundUp(interp->mapSize(), TheISA::PageBytes); 46211389Sbrandon.potter@amd.com 46311389Sbrandon.potter@amd.com // We are allocating the memory area; set the bias to the lowest address 46411389Sbrandon.potter@amd.com // in the allocated memory region. 46511905SBrandon.Potter@amd.com Addr mmap_end = memState->getMmapEnd(); 46611905SBrandon.Potter@amd.com Addr ld_bias = mmapGrowsDown() ? mmap_end - interp_mapsize : mmap_end; 46711389Sbrandon.potter@amd.com 46811389Sbrandon.potter@amd.com // Adjust the process mmap area to give the interpreter room; the real 46911389Sbrandon.potter@amd.com // execve system call would just invoke the kernel's internal mmap 47011389Sbrandon.potter@amd.com // functions to make these adjustments. 47111905SBrandon.Potter@amd.com mmap_end = mmapGrowsDown() ? ld_bias : mmap_end + interp_mapsize; 47211905SBrandon.Potter@amd.com memState->setMmapEnd(mmap_end); 47311389Sbrandon.potter@amd.com 47411389Sbrandon.potter@amd.com interp->updateBias(ld_bias); 47511389Sbrandon.potter@amd.com} 47611389Sbrandon.potter@amd.com 47711392Sbrandon.potter@amd.comObjectFile * 47811851Sbrandon.potter@amd.comProcess::getInterpreter() 47911392Sbrandon.potter@amd.com{ 48011392Sbrandon.potter@amd.com return objFile->getInterpreter(); 48111392Sbrandon.potter@amd.com} 48211392Sbrandon.potter@amd.com 48311389Sbrandon.potter@amd.comAddr 48411851Sbrandon.potter@amd.comProcess::getBias() 48511389Sbrandon.potter@amd.com{ 48611392Sbrandon.potter@amd.com ObjectFile *interp = getInterpreter(); 48711389Sbrandon.potter@amd.com 48811389Sbrandon.potter@amd.com return interp ? interp->bias() : objFile->bias(); 48911389Sbrandon.potter@amd.com} 49011389Sbrandon.potter@amd.com 49111389Sbrandon.potter@amd.comAddr 49211851Sbrandon.potter@amd.comProcess::getStartPC() 49311389Sbrandon.potter@amd.com{ 49411392Sbrandon.potter@amd.com ObjectFile *interp = getInterpreter(); 49511389Sbrandon.potter@amd.com 49611389Sbrandon.potter@amd.com return interp ? interp->entryPoint() : objFile->entryPoint(); 49711389Sbrandon.potter@amd.com} 49811389Sbrandon.potter@amd.com 49913883Sdavid.hashe@amd.comstd::string 50013883Sdavid.hashe@amd.comProcess::absolutePath(const std::string &filename, bool host_filesystem) 50113883Sdavid.hashe@amd.com{ 50213883Sdavid.hashe@amd.com if (filename.empty() || startswith(filename, "/")) 50313883Sdavid.hashe@amd.com return filename; 50413883Sdavid.hashe@amd.com 50513883Sdavid.hashe@amd.com // Construct the absolute path given the current working directory for 50613883Sdavid.hashe@amd.com // either the host filesystem or target filesystem. The distinction only 50713883Sdavid.hashe@amd.com // matters if filesystem redirection is utilized in the simulation. 50813906Sbrandon.potter@amd.com auto path_base = std::string(); 50913906Sbrandon.potter@amd.com if (host_filesystem) { 51013906Sbrandon.potter@amd.com path_base = hostCwd; 51113906Sbrandon.potter@amd.com assert(!hostCwd.empty()); 51213906Sbrandon.potter@amd.com } else { 51313906Sbrandon.potter@amd.com path_base = tgtCwd; 51413906Sbrandon.potter@amd.com assert(!tgtCwd.empty()); 51513906Sbrandon.potter@amd.com } 51613883Sdavid.hashe@amd.com 51713883Sdavid.hashe@amd.com // Add a trailing '/' if the current working directory did not have one. 51813883Sdavid.hashe@amd.com normalize(path_base); 51913883Sdavid.hashe@amd.com 52013883Sdavid.hashe@amd.com // Append the filename onto the current working path. 52113883Sdavid.hashe@amd.com auto absolute_path = path_base + filename; 52213883Sdavid.hashe@amd.com 52313883Sdavid.hashe@amd.com return absolute_path; 52413883Sdavid.hashe@amd.com} 52513883Sdavid.hashe@amd.com 52611851Sbrandon.potter@amd.comProcess * 52711851Sbrandon.potter@amd.comProcessParams::create() 5282715Sstever@eecs.umich.edu{ 52911919SBrandon.Potter@amd.com Process *process = nullptr; 5302715Sstever@eecs.umich.edu 53111140Sjthestness@gmail.com // If not specified, set the executable parameter equal to the 53211140Sjthestness@gmail.com // simulated system's zeroth command line parameter 53311851Sbrandon.potter@amd.com if (executable == "") { 53411851Sbrandon.potter@amd.com executable = cmd[0]; 53511140Sjthestness@gmail.com } 53611140Sjthestness@gmail.com 53711851Sbrandon.potter@amd.com ObjectFile *obj_file = createObjectFile(executable); 53813990Sgabeblack@google.com fatal_if(!obj_file, "Can't load object file %s", executable); 5392715Sstever@eecs.umich.edu 54013990Sgabeblack@google.com process = ObjectFile::tryLoaders(this, obj_file); 54113990Sgabeblack@google.com fatal_if(!process, "Unknown error creating process object."); 5425753Ssteve.reinhardt@amd.com 5432715Sstever@eecs.umich.edu return process; 5442715Sstever@eecs.umich.edu} 545