#include <unistd.h>
#include <cstdio>
+#include <map>
#include <string>
#include "base/loader/object_file.hh"
#include "arch/mips/linux/process.hh"
#elif THE_ISA == ARM_ISA
#include "arch/arm/linux/process.hh"
+#include "arch/arm/freebsd/process.hh"
#elif THE_ISA == X86_ISA
#include "arch/x86/linux/process.hh"
#elif THE_ISA == POWER_ISA
int num_processes = 0;
template<class IntType>
+
AuxVector<IntType>::AuxVector(IntType type, IntType val)
{
a_type = TheISA::htog(type);
template struct AuxVector<uint32_t>;
template struct AuxVector<uint64_t>;
+static int
+openFile(const string& filename, int flags, mode_t mode)
+{
+ int sim_fd = open(filename.c_str(), flags, mode);
+ if (sim_fd != -1)
+ return sim_fd;
+ fatal("Unable to open %s with mode %O", filename, mode);
+}
+
+static int
+openInputFile(const string &filename)
+{
+ return openFile(filename, O_RDONLY, 0);
+}
+
+static int
+openOutputFile(const string &filename)
+{
+ return openFile(filename, O_WRONLY | O_CREAT | O_TRUNC, 0664);
+}
+
Process::Process(ProcessParams * params)
: SimObject(params), system(params->system),
+ brk_point(0), stack_base(0), stack_size(0), stack_min(0),
max_stack_size(params->max_stack_size),
+ next_thread_stack_base(0),
M5_pid(system->allocatePID()),
useArchPT(params->useArchPT),
+ kvmInSE(params->kvmInSE),
pTable(useArchPT ?
static_cast<PageTableBase *>(new ArchPageTable(name(), M5_pid, system)) :
static_cast<PageTableBase *>(new FuncPageTable(name(), M5_pid)) ),
initVirtMem(system->getSystemPort(), this,
- SETranslatingPortProxy::Always)
+ SETranslatingPortProxy::Always),
+ fd_array(make_shared<array<FDEntry, NUM_FDS>>()),
+ imap {{"", -1},
+ {"cin", STDIN_FILENO},
+ {"stdin", STDIN_FILENO}},
+ oemap{{"", -1},
+ {"cout", STDOUT_FILENO},
+ {"stdout", STDOUT_FILENO},
+ {"cerr", STDERR_FILENO},
+ {"stderr", STDERR_FILENO}}
{
- string in = params->input;
- string out = params->output;
- string err = params->errout;
-
- // initialize file descriptors to default: same as simulator
- int stdin_fd, stdout_fd, stderr_fd;
-
- if (in == "stdin" || in == "cin")
- stdin_fd = STDIN_FILENO;
- else if (in == "None")
- stdin_fd = -1;
+ int sim_fd;
+ std::map<string,int>::iterator it;
+
+ // Search through the input options and set fd if match is found;
+ // otherwise, open an input file and seek to location.
+ FDEntry *fde_stdin = getFDEntry(STDIN_FILENO);
+ if ((it = imap.find(params->input)) != imap.end())
+ sim_fd = it->second;
else
- stdin_fd = Process::openInputFile(in);
-
- if (out == "stdout" || out == "cout")
- stdout_fd = STDOUT_FILENO;
- else if (out == "stderr" || out == "cerr")
- stdout_fd = STDERR_FILENO;
- else if (out == "None")
- stdout_fd = -1;
+ sim_fd = openInputFile(params->input);
+ fde_stdin->set(sim_fd, params->input, O_RDONLY, -1, false);
+
+ // Search through the output/error options and set fd if match is found;
+ // otherwise, open an output file and seek to location.
+ FDEntry *fde_stdout = getFDEntry(STDOUT_FILENO);
+ if ((it = oemap.find(params->output)) != oemap.end())
+ sim_fd = it->second;
else
- stdout_fd = Process::openOutputFile(out);
-
- if (err == "stdout" || err == "cout")
- stderr_fd = STDOUT_FILENO;
- else if (err == "stderr" || err == "cerr")
- stderr_fd = STDERR_FILENO;
- else if (err == "None")
- stderr_fd = -1;
- else if (err == out)
- stderr_fd = stdout_fd;
+ sim_fd = openOutputFile(params->output);
+ fde_stdout->set(sim_fd, params->output, O_WRONLY | O_CREAT | O_TRUNC,
+ 0664, false);
+
+ FDEntry *fde_stderr = getFDEntry(STDERR_FILENO);
+ if (params->output == params->errout)
+ // Reuse the same file descriptor if these match.
+ sim_fd = fde_stdout->fd;
+ else if ((it = oemap.find(params->errout)) != oemap.end())
+ sim_fd = it->second;
else
- stderr_fd = Process::openOutputFile(err);
-
- // initialize first 3 fds (stdin, stdout, stderr)
- Process::FdMap *fdo = &fd_map[STDIN_FILENO];
- fdo->fd = stdin_fd;
- fdo->filename = in;
- fdo->flags = O_RDONLY;
- fdo->mode = -1;
- fdo->fileOffset = 0;
-
- fdo = &fd_map[STDOUT_FILENO];
- fdo->fd = stdout_fd;
- fdo->filename = out;
- fdo->flags = O_WRONLY | O_CREAT | O_TRUNC;
- fdo->mode = 0774;
- fdo->fileOffset = 0;
-
- fdo = &fd_map[STDERR_FILENO];
- fdo->fd = stderr_fd;
- fdo->filename = err;
- fdo->flags = O_WRONLY;
- fdo->mode = -1;
- fdo->fileOffset = 0;
-
-
- // mark remaining fds as free
- for (int i = 3; i <= MAX_FD; ++i) {
- fdo = &fd_map[i];
- fdo->fd = -1;
- }
+ sim_fd = openOutputFile(params->errout);
+ fde_stderr->set(sim_fd, params->errout, O_WRONLY | O_CREAT | O_TRUNC,
+ 0664, false);
mmap_start = mmap_end = 0;
nxm_start = nxm_end = 0;
;
}
-//
-// static helper functions
-//
-int
-Process::openInputFile(const string &filename)
-{
- int fd = open(filename.c_str(), O_RDONLY);
-
- if (fd == -1) {
- perror(NULL);
- cerr << "unable to open \"" << filename << "\" for reading\n";
- fatal("can't open input file");
- }
-
- return fd;
-}
-
-
-int
-Process::openOutputFile(const string &filename)
+void
+Process::inheritFDArray(Process *p)
{
- int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0664);
-
- if (fd == -1) {
- perror(NULL);
- cerr << "unable to open \"" << filename << "\" for writing\n";
- fatal("can't open output file");
- }
-
- return fd;
+ fd_array = p->fd_array;
}
ThreadContext *
Process::findFreeContext()
{
- int size = contextIds.size();
- ThreadContext *tc;
- for (int i = 0; i < size; ++i) {
- tc = system->getThreadContext(contextIds[i]);
- if (tc->status() == ThreadContext::Halted) {
- // inactive context, free to use
+ for (int id : contextIds) {
+ ThreadContext *tc = system->getThreadContext(id);
+ if (tc->status() == ThreadContext::Halted)
return tc;
- }
}
return NULL;
}
pTable->initState(tc);
}
-// map simulator fd sim_fd to target fd tgt_fd
-void
-Process::dup_fd(int sim_fd, int tgt_fd)
+DrainState
+Process::drain()
{
- if (tgt_fd < 0 || tgt_fd > MAX_FD)
- panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd);
-
- Process::FdMap *fdo = &fd_map[tgt_fd];
- fdo->fd = sim_fd;
+ findFileOffsets();
+ return DrainState::Drained;
}
-
-// generate new target fd for sim_fd
int
-Process::alloc_fd(int sim_fd, string filename, int flags, int mode, bool pipe)
+Process::allocFD(int sim_fd, const string& filename, int flags, int mode,
+ bool pipe)
{
- // in case open() returns an error, don't allocate a new fd
- if (sim_fd == -1)
- return -1;
-
- // find first free target fd
- for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
- Process::FdMap *fdo = &fd_map[free_fd];
- if (fdo->fd == -1 && fdo->driver == NULL) {
- fdo->fd = sim_fd;
- fdo->filename = filename;
- fdo->mode = mode;
- fdo->fileOffset = 0;
- fdo->flags = flags;
- fdo->isPipe = pipe;
- fdo->readPipeSource = 0;
+ for (int free_fd = 0; free_fd < fd_array->size(); free_fd++) {
+ FDEntry *fde = getFDEntry(free_fd);
+ if (fde->isFree()) {
+ fde->set(sim_fd, filename, flags, mode, pipe);
return free_fd;
}
}
- panic("Process::alloc_fd: out of file descriptors!");
+ fatal("Out of target file descriptors");
}
-
-// free target fd (e.g., after close)
void
-Process::free_fd(int tgt_fd)
+Process::resetFDEntry(int tgt_fd)
{
- Process::FdMap *fdo = &fd_map[tgt_fd];
- if (fdo->fd == -1)
- warn("Process::free_fd: request to free unused fd %d", tgt_fd);
-
- fdo->fd = -1;
- fdo->filename = "NULL";
- fdo->mode = 0;
- fdo->fileOffset = 0;
- fdo->flags = 0;
- fdo->isPipe = false;
- fdo->readPipeSource = 0;
- fdo->driver = NULL;
-}
+ FDEntry *fde = getFDEntry(tgt_fd);
+ assert(fde->fd > -1);
+ fde->reset();
+}
-// look up simulator fd for given target fd
int
-Process::sim_fd(int tgt_fd)
+Process::getSimFD(int tgt_fd)
{
- if (tgt_fd < 0 || tgt_fd > MAX_FD)
- return -1;
-
- return fd_map[tgt_fd].fd;
+ FDEntry *entry = getFDEntry(tgt_fd);
+ return entry ? entry->fd : -1;
}
-Process::FdMap *
-Process::sim_fd_obj(int tgt_fd)
+FDEntry *
+Process::getFDEntry(int tgt_fd)
{
- if (tgt_fd < 0 || tgt_fd > MAX_FD)
- return NULL;
+ assert(0 <= tgt_fd && tgt_fd < fd_array->size());
+ return &(*fd_array)[tgt_fd];
+}
- return &fd_map[tgt_fd];
+int
+Process::getTgtFD(int sim_fd)
+{
+ for (int index = 0; index < fd_array->size(); index++)
+ if ((*fd_array)[index].fd == sim_fd)
+ return index;
+ return -1;
}
void
{
int npages = divCeil(size, (int64_t)PageBytes);
Addr paddr = system->allocPhysPages(npages);
- pTable->map(vaddr, paddr, size, clobber);
+ pTable->map(vaddr, paddr, size,
+ clobber ? PageTableBase::Clobber : PageTableBase::Zero);
}
bool
return false;
}
-// find all offsets for currently open files and save them
void
-Process::fix_file_offsets()
+Process::fixFileOffsets()
{
- Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO];
- Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO];
- Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO];
- string in = fdo_stdin->filename;
- string out = fdo_stdout->filename;
- string err = fdo_stderr->filename;
-
- // initialize file descriptors to default: same as simulator
- int stdin_fd, stdout_fd, stderr_fd;
-
- if (in == "stdin" || in == "cin")
- stdin_fd = STDIN_FILENO;
- else if (in == "None")
- stdin_fd = -1;
- else {
- // open standard in and seek to the right location
- stdin_fd = Process::openInputFile(in);
- if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0)
- panic("Unable to seek to correct location in file: %s", in);
+ auto seek = [] (FDEntry *fde)
+ {
+ if (lseek(fde->fd, fde->fileOffset, SEEK_SET) < 0)
+ fatal("Unable to see to location in %s", fde->filename);
+ };
+
+ std::map<string,int>::iterator it;
+
+ // Search through the input options and set fd if match is found;
+ // otherwise, open an input file and seek to location.
+ FDEntry *fde_stdin = getFDEntry(STDIN_FILENO);
+ if ((it = imap.find(fde_stdin->filename)) != imap.end()) {
+ fde_stdin->fd = it->second;
+ } else {
+ fde_stdin->fd = openInputFile(fde_stdin->filename);
+ seek(fde_stdin);
}
- if (out == "stdout" || out == "cout")
- stdout_fd = STDOUT_FILENO;
- else if (out == "stderr" || out == "cerr")
- stdout_fd = STDERR_FILENO;
- else if (out == "None")
- stdout_fd = -1;
- else {
- stdout_fd = Process::openOutputFile(out);
- if (lseek(stdout_fd, fdo_stdout->fileOffset, SEEK_SET) < 0)
- panic("Unable to seek to correct location in file: %s", out);
+ // Search through the output/error options and set fd if match is found;
+ // otherwise, open an output file and seek to location.
+ FDEntry *fde_stdout = getFDEntry(STDOUT_FILENO);
+ if ((it = oemap.find(fde_stdout->filename)) != oemap.end()) {
+ fde_stdout->fd = it->second;
+ } else {
+ fde_stdout->fd = openOutputFile(fde_stdout->filename);
+ seek(fde_stdout);
}
- if (err == "stdout" || err == "cout")
- stderr_fd = STDOUT_FILENO;
- else if (err == "stderr" || err == "cerr")
- stderr_fd = STDERR_FILENO;
- else if (err == "None")
- stderr_fd = -1;
- else if (err == out)
- stderr_fd = stdout_fd;
- else {
- stderr_fd = Process::openOutputFile(err);
- if (lseek(stderr_fd, fdo_stderr->fileOffset, SEEK_SET) < 0)
- panic("Unable to seek to correct location in file: %s", err);
+ FDEntry *fde_stderr = getFDEntry(STDERR_FILENO);
+ if (fde_stdout->filename == fde_stderr->filename) {
+ // Reuse the same file descriptor if these match.
+ fde_stderr->fd = fde_stdout->fd;
+ } else if ((it = oemap.find(fde_stderr->filename)) != oemap.end()) {
+ fde_stderr->fd = it->second;
+ } else {
+ fde_stderr->fd = openOutputFile(fde_stderr->filename);
+ seek(fde_stderr);
}
- fdo_stdin->fd = stdin_fd;
- fdo_stdout->fd = stdout_fd;
- fdo_stderr->fd = stderr_fd;
-
-
- for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) {
- Process::FdMap *fdo = &fd_map[free_fd];
- if (fdo->fd != -1) {
- if (fdo->isPipe){
- if (fdo->filename == "PIPE-WRITE")
- continue;
- else {
- assert (fdo->filename == "PIPE-READ");
- //create a new pipe
- int fds[2];
- int pipe_retval = pipe(fds);
-
- if (pipe_retval < 0) {
- // error
- panic("Unable to create new pipe.");
- }
- fdo->fd = fds[0]; //set read pipe
- Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource];
- if (fdo_write->filename != "PIPE-WRITE")
- panic ("Couldn't find write end of the pipe");
-
- fdo_write->fd = fds[1];//set write pipe
- }
- } else {
- //Open file
- int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode);
-
- if (fd == -1)
- panic("Unable to open file: %s", fdo->filename);
- fdo->fd = fd;
-
- //Seek to correct location before checkpoint
- if (lseek(fd,fdo->fileOffset, SEEK_SET) < 0)
- panic("Unable to seek to correct location in file: %s",
- fdo->filename);
- }
- }
- }
-}
+ for (int tgt_fd = 3; tgt_fd < fd_array->size(); tgt_fd++) {
+ FDEntry *fde = getFDEntry(tgt_fd);
+ if (fde->fd == -1)
+ continue;
-void
-Process::find_file_offsets()
-{
- for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
- Process::FdMap *fdo = &fd_map[free_fd];
- if (fdo->fd != -1) {
- fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
+ if (fde->isPipe) {
+ if (fde->filename == "PIPE-WRITE")
+ continue;
+ assert(fde->filename == "PIPE-READ");
+
+ int fds[2];
+ if (pipe(fds) < 0)
+ fatal("Unable to create new pipe");
+
+ fde->fd = fds[0];
+
+ FDEntry *fde_write = getFDEntry(fde->readPipeSource);
+ assert(
+ fde_write->filename == "PIPE-WRITE");
+ fde_write->fd = fds[1];
} else {
- fdo->filename = "NULL";
- fdo->fileOffset = 0;
+ fde->fd = openFile(fde->filename.c_str(), fde->flags, fde->mode);
+ seek(fde);
}
}
}
void
-Process::setReadPipeSource(int read_pipe_fd, int source_fd)
-{
- Process::FdMap *fdo = &fd_map[read_pipe_fd];
- fdo->readPipeSource = source_fd;
-}
-
-void
-Process::FdMap::serialize(std::ostream &os)
+Process::findFileOffsets()
{
- SERIALIZE_SCALAR(fd);
- SERIALIZE_SCALAR(isPipe);
- SERIALIZE_SCALAR(filename);
- SERIALIZE_SCALAR(flags);
- SERIALIZE_SCALAR(readPipeSource);
- SERIALIZE_SCALAR(fileOffset);
+ for (auto& fde : *fd_array) {
+ if (fde.fd != -1)
+ fde.fileOffset = lseek(fde.fd, 0, SEEK_CUR);
+ }
}
void
-Process::FdMap::unserialize(Checkpoint *cp, const std::string §ion)
+Process::setReadPipeSource(int read_pipe_fd, int source_fd)
{
- UNSERIALIZE_SCALAR(fd);
- UNSERIALIZE_SCALAR(isPipe);
- UNSERIALIZE_SCALAR(filename);
- UNSERIALIZE_SCALAR(flags);
- UNSERIALIZE_SCALAR(readPipeSource);
- UNSERIALIZE_SCALAR(fileOffset);
+ FDEntry *fde = getFDEntry(read_pipe_fd);
+ assert(source_fd >= -1);
+ fde->readPipeSource = source_fd;
}
void
-Process::serialize(std::ostream &os)
+Process::serialize(CheckpointOut &cp) const
{
SERIALIZE_SCALAR(brk_point);
SERIALIZE_SCALAR(stack_base);
SERIALIZE_SCALAR(mmap_end);
SERIALIZE_SCALAR(nxm_start);
SERIALIZE_SCALAR(nxm_end);
- find_file_offsets();
- pTable->serialize(os);
- for (int x = 0; x <= MAX_FD; x++) {
- nameOut(os, csprintf("%s.FdMap%d", name(), x));
- fd_map[x].serialize(os);
+ pTable->serialize(cp);
+ for (int x = 0; x < fd_array->size(); x++) {
+ (*fd_array)[x].serializeSection(cp, csprintf("FDEntry%d", x));
}
SERIALIZE_SCALAR(M5_pid);
}
void
-Process::unserialize(Checkpoint *cp, const std::string §ion)
+Process::unserialize(CheckpointIn &cp)
{
UNSERIALIZE_SCALAR(brk_point);
UNSERIALIZE_SCALAR(stack_base);
UNSERIALIZE_SCALAR(mmap_end);
UNSERIALIZE_SCALAR(nxm_start);
UNSERIALIZE_SCALAR(nxm_end);
- pTable->unserialize(cp, section);
- for (int x = 0; x <= MAX_FD; x++) {
- fd_map[x].unserialize(cp, csprintf("%s.FdMap%d", section, x));
+ pTable->unserialize(cp);
+ for (int x = 0; x < fd_array->size(); x++) {
+ FDEntry *fde = getFDEntry(x);
+ fde->unserializeSection(cp, csprintf("FDEntry%d", x));
}
- fix_file_offsets();
+ fixFileOffsets();
UNSERIALIZE_OPT_SCALAR(M5_pid);
// The above returns a bool so that you could do something if you don't
// find the param in the checkpoint if you wanted to, like set a default
- // but in this case we'll just stick with the instantianted value if not
- // found.
+ // but in this case we'll just stick with the instantiated value if not
+ // found.
}
bool
-Process::map(Addr vaddr, Addr paddr, int size)
+Process::map(Addr vaddr, Addr paddr, int size, bool cacheable)
{
- pTable->map(vaddr, paddr, size);
+ pTable->map(vaddr, paddr, size,
+ cacheable ? PageTableBase::Zero : PageTableBase::Uncacheable);
return true;
}
LiveProcess::LiveProcess(LiveProcessParams *params, ObjectFile *_objFile)
: Process(params), objFile(_objFile),
argv(params->cmd), envp(params->env), cwd(params->cwd),
+ executable(params->executable),
__uid(params->uid), __euid(params->euid),
__gid(params->gid), __egid(params->egid),
__pid(params->pid), __ppid(params->ppid),
{
LiveProcess *process = NULL;
- string executable =
- params->executable == "" ? params->cmd[0] : params->executable;
- ObjectFile *objFile = createObjectFile(executable);
+ // If not specified, set the executable parameter equal to the
+ // simulated system's zeroth command line parameter
+ if (params->executable == "") {
+ params->executable = params->cmd[0];
+ }
+
+ ObjectFile *objFile = createObjectFile(params->executable);
if (objFile == NULL) {
- fatal("Can't load object file %s", executable);
+ fatal("Can't load object file %s", params->executable);
}
if (objFile->isDynamic())
objFile->getArch());
}
break;
+ case ObjectFile::FreeBSD:
+ if (arch == ObjectFile::Arm64) {
+ process = new ArmFreebsdProcess64(params, objFile,
+ objFile->getArch());
+ } else {
+ process = new ArmFreebsdProcess32(params, objFile,
+ objFile->getArch());
+ }
+ break;
case ObjectFile::LinuxArmOABI:
fatal("M5 does not support ARM OABI binaries. Please recompile with an"
" EABI compiler.");
projects / gem5.git / blobdiff