process.cc (11855:c706f4ab5dd7) process.cc (11856:103e2f92c965)
1/*
1/*
2 * Copyright (c) 2014 Advanced Micro Devices, Inc.
2 * Copyright (c) 2014-2016 Advanced Micro Devices, Inc.
3 * Copyright (c) 2012 ARM Limited
4 * All rights reserved
5 *
6 * The license below extends only to copyright in the software and shall
7 * not be construed as granting a license to any other intellectual
8 * property including but not limited to intellectual property relating
9 * to a hardware implementation of the functionality of the software
10 * licensed hereunder. You may use the software subject to the license

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36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40 *
41 * Authors: Nathan Binkert
42 * Steve Reinhardt
43 * Ali Saidi
3 * Copyright (c) 2012 ARM Limited
4 * All rights reserved
5 *
6 * The license below extends only to copyright in the software and shall
7 * not be construed as granting a license to any other intellectual
8 * property including but not limited to intellectual property relating
9 * to a hardware implementation of the functionality of the software
10 * licensed hereunder. You may use the software subject to the license

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36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40 *
41 * Authors: Nathan Binkert
42 * Steve Reinhardt
43 * Ali Saidi
44 * Brandon Potter
44 */
45
46#include "sim/process.hh"
47
48#include <fcntl.h>
49#include <unistd.h>
50
51#include <array>

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58#include "base/loader/symtab.hh"
59#include "base/statistics.hh"
60#include "config/the_isa.hh"
61#include "cpu/thread_context.hh"
62#include "mem/page_table.hh"
63#include "mem/se_translating_port_proxy.hh"
64#include "params/Process.hh"
65#include "sim/emul_driver.hh"
45 */
46
47#include "sim/process.hh"
48
49#include <fcntl.h>
50#include <unistd.h>
51
52#include <array>

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59#include "base/loader/symtab.hh"
60#include "base/statistics.hh"
61#include "config/the_isa.hh"
62#include "cpu/thread_context.hh"
63#include "mem/page_table.hh"
64#include "mem/se_translating_port_proxy.hh"
65#include "params/Process.hh"
66#include "sim/emul_driver.hh"
67#include "sim/fd_array.hh"
68#include "sim/fd_entry.hh"
66#include "sim/syscall_desc.hh"
67#include "sim/system.hh"
68
69#if THE_ISA == ALPHA_ISA
70#include "arch/alpha/linux/process.hh"
71#elif THE_ISA == SPARC_ISA
72#include "arch/sparc/linux/process.hh"
73#include "arch/sparc/solaris/process.hh"

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85#else
86#error "THE_ISA not set"
87#endif
88
89
90using namespace std;
91using namespace TheISA;
92
69#include "sim/syscall_desc.hh"
70#include "sim/system.hh"
71
72#if THE_ISA == ALPHA_ISA
73#include "arch/alpha/linux/process.hh"
74#elif THE_ISA == SPARC_ISA
75#include "arch/sparc/linux/process.hh"
76#include "arch/sparc/solaris/process.hh"

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88#else
89#error "THE_ISA not set"
90#endif
91
92
93using namespace std;
94using namespace TheISA;
95
93static int
94openFile(const string& filename, int flags, mode_t mode)
95{
96 int sim_fd = open(filename.c_str(), flags, mode);
97 if (sim_fd != -1)
98 return sim_fd;
99 fatal("Unable to open %s with mode %O", filename, mode);
100}
101
102static int
103openInputFile(const string &filename)
104{
105 return openFile(filename, O_RDONLY, 0);
106}
107
108static int
109openOutputFile(const string &filename)
110{
111 return openFile(filename, O_WRONLY | O_CREAT | O_TRUNC, 0664);
112}
113
114Process::Process(ProcessParams * params, ObjectFile * obj_file)
115 : SimObject(params), system(params->system),
116 brk_point(0), stack_base(0), stack_size(0), stack_min(0),
117 max_stack_size(params->max_stack_size),
118 next_thread_stack_base(0),
119 useArchPT(params->useArchPT),
120 kvmInSE(params->kvmInSE),
121 pTable(useArchPT ?
122 static_cast<PageTableBase *>(new ArchPageTable(name(), params->pid,
123 system)) :
124 static_cast<PageTableBase *>(new FuncPageTable(name(), params->pid))),
125 initVirtMem(system->getSystemPort(), this,
126 SETranslatingPortProxy::Always),
96Process::Process(ProcessParams * params, ObjectFile * obj_file)
97 : SimObject(params), system(params->system),
98 brk_point(0), stack_base(0), stack_size(0), stack_min(0),
99 max_stack_size(params->max_stack_size),
100 next_thread_stack_base(0),
101 useArchPT(params->useArchPT),
102 kvmInSE(params->kvmInSE),
103 pTable(useArchPT ?
104 static_cast<PageTableBase *>(new ArchPageTable(name(), params->pid,
105 system)) :
106 static_cast<PageTableBase *>(new FuncPageTable(name(), params->pid))),
107 initVirtMem(system->getSystemPort(), this,
108 SETranslatingPortProxy::Always),
127 fd_array(make_shared<array<FDEntry, NUM_FDS>>()),
128 imap {{"", -1},
129 {"cin", STDIN_FILENO},
130 {"stdin", STDIN_FILENO}},
131 oemap{{"", -1},
132 {"cout", STDOUT_FILENO},
133 {"stdout", STDOUT_FILENO},
134 {"cerr", STDERR_FILENO},
135 {"stderr", STDERR_FILENO}},
136 objFile(obj_file),
137 argv(params->cmd), envp(params->env), cwd(params->cwd),
138 executable(params->executable),
139 _uid(params->uid), _euid(params->euid),
140 _gid(params->gid), _egid(params->egid),
141 _pid(params->pid), _ppid(params->ppid),
109 objFile(obj_file),
110 argv(params->cmd), envp(params->env), cwd(params->cwd),
111 executable(params->executable),
112 _uid(params->uid), _euid(params->euid),
113 _gid(params->gid), _egid(params->egid),
114 _pid(params->pid), _ppid(params->ppid),
142 drivers(params->drivers)
115 drivers(params->drivers),
116 fds(make_shared<FDArray>(params->input, params->output, params->errout))
143{
117{
144 int sim_fd;
145 std::map<string,int>::iterator it;
146
147 // Search through the input options and set fd if match is found;
148 // otherwise, open an input file and seek to location.
149 FDEntry *fde_stdin = getFDEntry(STDIN_FILENO);
150 if ((it = imap.find(params->input)) != imap.end())
151 sim_fd = it->second;
152 else
153 sim_fd = openInputFile(params->input);
154 fde_stdin->set(sim_fd, params->input, O_RDONLY, -1, false);
155
156 // Search through the output/error options and set fd if match is found;
157 // otherwise, open an output file and seek to location.
158 FDEntry *fde_stdout = getFDEntry(STDOUT_FILENO);
159 if ((it = oemap.find(params->output)) != oemap.end())
160 sim_fd = it->second;
161 else
162 sim_fd = openOutputFile(params->output);
163 fde_stdout->set(sim_fd, params->output, O_WRONLY | O_CREAT | O_TRUNC,
164 0664, false);
165
166 FDEntry *fde_stderr = getFDEntry(STDERR_FILENO);
167 if (params->output == params->errout)
168 // Reuse the same file descriptor if these match.
169 sim_fd = fde_stdout->fd;
170 else if ((it = oemap.find(params->errout)) != oemap.end())
171 sim_fd = it->second;
172 else
173 sim_fd = openOutputFile(params->errout);
174 fde_stderr->set(sim_fd, params->errout, O_WRONLY | O_CREAT | O_TRUNC,
175 0664, false);
176
177 mmap_end = 0;
118 mmap_end = 0;
178 // other parameters will be initialized when the program is loaded
179
180 // load up symbols, if any... these may be used for debugging or
181 // profiling.
182 if (!debugSymbolTable) {
183 debugSymbolTable = new SymbolTable();
184 if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
185 !objFile->loadLocalSymbols(debugSymbolTable) ||
186 !objFile->loadWeakSymbols(debugSymbolTable)) {

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199 using namespace Stats;
200
201 num_syscalls
202 .name(name() + ".num_syscalls")
203 .desc("Number of system calls")
204 ;
205}
206
119
120 // load up symbols, if any... these may be used for debugging or
121 // profiling.
122 if (!debugSymbolTable) {
123 debugSymbolTable = new SymbolTable();
124 if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
125 !objFile->loadLocalSymbols(debugSymbolTable) ||
126 !objFile->loadWeakSymbols(debugSymbolTable)) {

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139 using namespace Stats;
140
141 num_syscalls
142 .name(name() + ".num_syscalls")
143 .desc("Number of system calls")
144 ;
145}
146
207void
208Process::inheritFDArray(Process *p)
209{
210 fd_array = p->fd_array;
211}
212
213ThreadContext *
214Process::findFreeContext()
215{
216 for (int id : contextIds) {
217 ThreadContext *tc = system->getThreadContext(id);
218 if (tc->status() == ThreadContext::Halted)
219 return tc;
220 }

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234 tc->activate();
235
236 pTable->initState(tc);
237}
238
239DrainState
240Process::drain()
241{
147ThreadContext *
148Process::findFreeContext()
149{
150 for (int id : contextIds) {
151 ThreadContext *tc = system->getThreadContext(id);
152 if (tc->status() == ThreadContext::Halted)
153 return tc;
154 }

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168 tc->activate();
169
170 pTable->initState(tc);
171}
172
173DrainState
174Process::drain()
175{
242 findFileOffsets();
176 fds->updateFileOffsets();
243 return DrainState::Drained;
244}
245
177 return DrainState::Drained;
178}
179
246int
247Process::allocFD(int sim_fd, const string& filename, int flags, int mode,
248 bool pipe)
249{
250 for (int free_fd = 0; free_fd < fd_array->size(); free_fd++) {
251 FDEntry *fde = getFDEntry(free_fd);
252 if (fde->isFree()) {
253 fde->set(sim_fd, filename, flags, mode, pipe);
254 return free_fd;
255 }
256 }
257
258 fatal("Out of target file descriptors");
259}
260
261void
180void
262Process::resetFDEntry(int tgt_fd)
263{
264 FDEntry *fde = getFDEntry(tgt_fd);
265 assert(fde->fd > -1);
266
267 fde->reset();
268}
269
270int
271Process::getSimFD(int tgt_fd)
272{
273 FDEntry *entry = getFDEntry(tgt_fd);
274 return entry ? entry->fd : -1;
275}
276
277FDEntry *
278Process::getFDEntry(int tgt_fd)
279{
280 assert(0 <= tgt_fd && tgt_fd < fd_array->size());
281 return &(*fd_array)[tgt_fd];
282}
283
284int
285Process::getTgtFD(int sim_fd)
286{
287 for (int index = 0; index < fd_array->size(); index++)
288 if ((*fd_array)[index].fd == sim_fd)
289 return index;
290 return -1;
291}
292
293void
294Process::allocateMem(Addr vaddr, int64_t size, bool clobber)
295{
296 int npages = divCeil(size, (int64_t)PageBytes);
297 Addr paddr = system->allocPhysPages(npages);
298 pTable->map(vaddr, paddr, size,
299 clobber ? PageTableBase::Clobber : PageTableBase::Zero);
300}
301

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320 inform("Increasing stack size by one page.");
321 };
322 return true;
323 }
324 return false;
325}
326
327void
181Process::allocateMem(Addr vaddr, int64_t size, bool clobber)
182{
183 int npages = divCeil(size, (int64_t)PageBytes);
184 Addr paddr = system->allocPhysPages(npages);
185 pTable->map(vaddr, paddr, size,
186 clobber ? PageTableBase::Clobber : PageTableBase::Zero);
187}
188

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207 inform("Increasing stack size by one page.");
208 };
209 return true;
210 }
211 return false;
212}
213
214void
328Process::fixFileOffsets()
329{
330 auto seek = [] (FDEntry *fde)
331 {
332 if (lseek(fde->fd, fde->fileOffset, SEEK_SET) < 0)
333 fatal("Unable to see to location in %s", fde->filename);
334 };
335
336 std::map<string,int>::iterator it;
337
338 // Search through the input options and set fd if match is found;
339 // otherwise, open an input file and seek to location.
340 FDEntry *fde_stdin = getFDEntry(STDIN_FILENO);
341
342 // Check if user has specified a different input file, and if so, use it
343 // instead of the file specified in the checkpoint. This also resets the
344 // file offset from the checkpointed value
345 string new_in = ((ProcessParams*)params())->input;
346 if (new_in != fde_stdin->filename) {
347 warn("Using new input file (%s) rather than checkpointed (%s)\n",
348 new_in, fde_stdin->filename);
349 fde_stdin->filename = new_in;
350 fde_stdin->fileOffset = 0;
351 }
352
353 if ((it = imap.find(fde_stdin->filename)) != imap.end()) {
354 fde_stdin->fd = it->second;
355 } else {
356 fde_stdin->fd = openInputFile(fde_stdin->filename);
357 seek(fde_stdin);
358 }
359
360 // Search through the output/error options and set fd if match is found;
361 // otherwise, open an output file and seek to location.
362 FDEntry *fde_stdout = getFDEntry(STDOUT_FILENO);
363
364 // Check if user has specified a different output file, and if so, use it
365 // instead of the file specified in the checkpoint. This also resets the
366 // file offset from the checkpointed value
367 string new_out = ((ProcessParams*)params())->output;
368 if (new_out != fde_stdout->filename) {
369 warn("Using new output file (%s) rather than checkpointed (%s)\n",
370 new_out, fde_stdout->filename);
371 fde_stdout->filename = new_out;
372 fde_stdout->fileOffset = 0;
373 }
374
375 if ((it = oemap.find(fde_stdout->filename)) != oemap.end()) {
376 fde_stdout->fd = it->second;
377 } else {
378 fde_stdout->fd = openOutputFile(fde_stdout->filename);
379 seek(fde_stdout);
380 }
381
382 FDEntry *fde_stderr = getFDEntry(STDERR_FILENO);
383
384 // Check if user has specified a different error file, and if so, use it
385 // instead of the file specified in the checkpoint. This also resets the
386 // file offset from the checkpointed value
387 string new_err = ((ProcessParams*)params())->errout;
388 if (new_err != fde_stderr->filename) {
389 warn("Using new error file (%s) rather than checkpointed (%s)\n",
390 new_err, fde_stderr->filename);
391 fde_stderr->filename = new_err;
392 fde_stderr->fileOffset = 0;
393 }
394
395 if (fde_stdout->filename == fde_stderr->filename) {
396 // Reuse the same file descriptor if these match.
397 fde_stderr->fd = fde_stdout->fd;
398 } else if ((it = oemap.find(fde_stderr->filename)) != oemap.end()) {
399 fde_stderr->fd = it->second;
400 } else {
401 fde_stderr->fd = openOutputFile(fde_stderr->filename);
402 seek(fde_stderr);
403 }
404
405 for (int tgt_fd = 3; tgt_fd < fd_array->size(); tgt_fd++) {
406 FDEntry *fde = getFDEntry(tgt_fd);
407 if (fde->fd == -1)
408 continue;
409
410 if (fde->isPipe) {
411 if (fde->filename == "PIPE-WRITE")
412 continue;
413 assert(fde->filename == "PIPE-READ");
414
415 int fds[2];
416 if (pipe(fds) < 0)
417 fatal("Unable to create new pipe");
418
419 fde->fd = fds[0];
420
421 FDEntry *fde_write = getFDEntry(fde->readPipeSource);
422 assert(fde_write->filename == "PIPE-WRITE");
423 fde_write->fd = fds[1];
424 } else {
425 fde->fd = openFile(fde->filename.c_str(), fde->flags, fde->mode);
426 seek(fde);
427 }
428 }
429}
430
431void
432Process::findFileOffsets()
433{
434 for (auto& fde : *fd_array) {
435 if (fde.fd != -1)
436 fde.fileOffset = lseek(fde.fd, 0, SEEK_CUR);
437 }
438}
439
440void
441Process::setReadPipeSource(int read_pipe_fd, int source_fd)
442{
443 FDEntry *fde = getFDEntry(read_pipe_fd);
444 assert(source_fd >= -1);
445 fde->readPipeSource = source_fd;
446}
447
448void
449Process::serialize(CheckpointOut &cp) const
450{
451 SERIALIZE_SCALAR(brk_point);
452 SERIALIZE_SCALAR(stack_base);
453 SERIALIZE_SCALAR(stack_size);
454 SERIALIZE_SCALAR(stack_min);
455 SERIALIZE_SCALAR(next_thread_stack_base);
456 SERIALIZE_SCALAR(mmap_end);
457 pTable->serialize(cp);
215Process::serialize(CheckpointOut &cp) const
216{
217 SERIALIZE_SCALAR(brk_point);
218 SERIALIZE_SCALAR(stack_base);
219 SERIALIZE_SCALAR(stack_size);
220 SERIALIZE_SCALAR(stack_min);
221 SERIALIZE_SCALAR(next_thread_stack_base);
222 SERIALIZE_SCALAR(mmap_end);
223 pTable->serialize(cp);
458 for (int x = 0; x < fd_array->size(); x++) {
459 (*fd_array)[x].serializeSection(cp, csprintf("FDEntry%d", x));
460 }
224 /**
225 * Checkpoints for file descriptors currently do not work. Need to
226 * come back and fix them at a later date.
227 */
461
228
229 warn("Checkpoints for file descriptors currently do not work.");
230#if 0
231 for (int x = 0; x < fds->getSize(); x++)
232 (*fds)[x].serializeSection(cp, csprintf("FDEntry%d", x));
233#endif
234
462}
463
464void
465Process::unserialize(CheckpointIn &cp)
466{
467 UNSERIALIZE_SCALAR(brk_point);
468 UNSERIALIZE_SCALAR(stack_base);
469 UNSERIALIZE_SCALAR(stack_size);
470 UNSERIALIZE_SCALAR(stack_min);
471 UNSERIALIZE_SCALAR(next_thread_stack_base);
472 UNSERIALIZE_SCALAR(mmap_end);
473 pTable->unserialize(cp);
235}
236
237void
238Process::unserialize(CheckpointIn &cp)
239{
240 UNSERIALIZE_SCALAR(brk_point);
241 UNSERIALIZE_SCALAR(stack_base);
242 UNSERIALIZE_SCALAR(stack_size);
243 UNSERIALIZE_SCALAR(stack_min);
244 UNSERIALIZE_SCALAR(next_thread_stack_base);
245 UNSERIALIZE_SCALAR(mmap_end);
246 pTable->unserialize(cp);
474 for (int x = 0; x < fd_array->size(); x++) {
475 FDEntry *fde = getFDEntry(x);
476 fde->unserializeSection(cp, csprintf("FDEntry%d", x));
477 }
478 fixFileOffsets();
247 /**
248 * Checkpoints for file descriptors currently do not work. Need to
249 * come back and fix them at a later date.
250 */
251 warn("Checkpoints for file descriptors currently do not work.");
252#if 0
253 for (int x = 0; x < fds->getSize(); x++)
254 (*fds)[x]->unserializeSection(cp, csprintf("FDEntry%d", x));
255 fds->restoreFileOffsets();
256#endif
479 // The above returns a bool so that you could do something if you don't
480 // find the param in the checkpoint if you wanted to, like set a default
481 // but in this case we'll just stick with the instantiated value if not
482 // found.
483}
484
485bool
486Process::map(Addr vaddr, Addr paddr, int size, bool cacheable)

--- 250 unchanged lines hidden --- 		257 // The above returns a bool so that you could do something if you don't
258 // find the param in the checkpoint if you wanted to, like set a default
259 // but in this case we'll just stick with the instantiated value if not
260 // found.
261}
262
263bool
264Process::map(Addr vaddr, Addr paddr, int size, bool cacheable)

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