OK linking against a hand built winpthreads (with -O1 in CFLAGS and LDFLAGS): $ gdb --args ./fio.exe --debug=all --filename=fiojob --thread --size=512 --rw=read --bs=512 --ioengine=sync --verify_pattern=0xdeadbeef --name=fiojobname GNU gdb (GDB) 7.6.50.20130728-cvs (cygwin-special) Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i686-pc-cygwin". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word". .. Reading symbols from /home/Sitsofe Wheeler/fio/fio.exe...done. (gdb) ru Starting program: /home/Sitsofe Wheeler/fio/fio.exe --debug=all --filename=fiojob --thread --size=512 --rw=read --bs=512 --ioengine=sync --verify_pattern=0xdeadbeef --name=fiojobname [New Thread 1224.0xeb8] [New Thread 1224.0xf8c] fio: set all debug options io 1224 load ioengine windowsaio parse 1224 handle_option=filename, ptr=fiojob parse 1224 __handle_option=filename, type=5, ptr=fiojob file 1224 add file fiojob file 1224 resize file array to 1 files file 1224 file 02130008 "fiojob" added at 0 parse 1224 handle_option=thread, ptr=(null) parse 1224 __handle_option=thread, type=10, ptr=(null) parse 1224 ret=0, out=1 parse 1224 handle_option=size, ptr=512 parse 1224 __handle_option=size, type=3, ptr=512 parse 1224 ret=0, out=512 parse 1224 handle_option=rw, ptr=read parse 1224 __handle_option=rw, type=1, ptr=read parse 1224 handle_option=bs, ptr=512 parse 1224 __handle_option=bs, type=7, ptr=512 parse 1224 ret=0, out=512 parse 1224 handle_option=ioengine, ptr=sync parse 1224 __handle_option=ioengine, type=5, ptr=sync io 1224 free ioengine windowsaio io 1224 load ioengine sync parse 1224 handle_option=verify_pattern, ptr=0xdeadbeef parse 1224 __handle_option=verify_pattern, type=1, ptr=0xdeadbeef file 1224 dup files: 1 io 1224 load ioengine sync parse 1224 handle_option=name, ptr=fiojobname parse 1224 __handle_option=name, type=5, ptr=fiojobname fiojobname: (g=0): rw=read, bs=512-512/512-512/512-512, ioengine=sync, iodepth=1 parse 1224 free options fio-2.1.4-48-gea66 time 1224 cycles[0]=2593 time 1224 cycles[1]=2593 time 1224 cycles[2]=2593 time 1224 cycles[3]=2592 time 1224 cycles[4]=2593 time 1224 cycles[5]=2758 time 1224 cycles[6]=2594 time 1224 cycles[7]=2594 time 1224 cycles[8]=2593 time 1224 cycles[9]=2598 time 1224 cycles[10]=2592 time 1224 cycles[11]=2593 time 1224 cycles[12]=2593 time 1224 cycles[13]=2593 time 1224 cycles[14]=2593 time 1224 cycles[15]=3518 time 1224 cycles[16]=2593 time 1224 cycles[17]=2593 time 1224 cycles[18]=2593 time 1224 cycles[19]=2593 time 1224 cycles[20]=2593 time 1224 cycles[21]=2593 time 1224 cycles[22]=2593 time 1224 cycles[23]=2593 time 1224 cycles[24]=2593 time 1224 cycles[25]=2593 time 1224 cycles[26]=2593 time 1224 cycles[27]=2593 time 1224 cycles[28]=2593 time 1224 cycles[29]=2593 time 1224 cycles[30]=2592 time 1224 cycles[31]=2593 time 1224 cycles[32]=2593 time 1224 cycles[33]=2593 time 1224 cycles[34]=2593 time 1224 cycles[35]=2593 time 1224 cycles[36]=2593 time 1224 cycles[37]=2593 time 1224 cycles[38]=2593 time 1224 cycles[39]=2593 time 1224 cycles[40]=2593 time 1224 cycles[41]=2593 time 1224 cycles[42]=2593 time 1224 cycles[43]=2593 time 1224 cycles[44]=2593 time 1224 cycles[45]=2593 time 1224 cycles[46]=2593 time 1224 cycles[47]=2593 time 1224 cycles[48]=2593 time 1224 cycles[49]=2593 time 1224 avg: 2593 time 1224 mean=2615.262000, S=26.484294 time 1224 inv_cycles_per_usec=6470 mutex 1224 wait on startup_mutex mutex 1224 done waiting on startup_mutex Starting 1 thread [New Thread 1224.0xc40] Program received signal SIGSEGV, Segmentation fault. mutex_unref (m=m@entry=0x830000, r=r@entry=0) at src/mutex.c:42 42 mutex_t *m_ = (mutex_t *)*m; (gdb) bt #0 mutex_unref (m=m@entry=0x830000, r=r@entry=0) at src/mutex.c:42 #1 0x00438e3f in pthread_mutex_unlock (m=m@entry=0x830000) at src/mutex.c:392 #2 0x004188a4 in fio_mutex_up (mutex=0x830000) at mutex.c:153 #3 0x0042f5b4 in run_threads () at backend.c:1885 #4 0x0042f790 in fio_backend () at backend.c:1998 #5 0x00438afe in main (argc=10, argv=0x3d28a0, envp=0x3d1998) at fio.c:50 (gdb) print *m Cannot access memory at address 0x830000 (gdb) list 37 static pthread_spinlock_t mutex_global_static = PTHREAD_SPINLOCK_INITIALIZER; 38 39 static WINPTHREADS_ATTRIBUTE((noinline)) int 40 mutex_unref (pthread_mutex_t *m, int r) 41 { 42 mutex_t *m_ = (mutex_t *)*m; 43 pthread_spin_lock (&mutex_global); 44 #ifdef WINPTHREAD_DBG 45 assert((m_->valid == LIFE_MUTEX) && (m_->busy > 0)); 46 #endif (gdb) up #1 0x00438e3f in pthread_mutex_unlock (m=m@entry=0x830000) at src/mutex.c:392 392 return mutex_unref(m,0); (gdb) list pthread_mutex_unlock 334 r = pthread_mutex_lock_intern(m, (ct > t ? 0 : (t - ct))); 335 return r; 336 } 337 338 int pthread_mutex_unlock(pthread_mutex_t *m) 339 { 340 mutex_t *_m; 341 int r = mutex_ref_unlock(m); 342 343 if(r) { (gdb) 344 #if 0 345 printf("thread %d, la pool, no user unset in mutex %p\n", GetCurrentThreadId(), m); 346 #endif 347 return r; 348 } 349 350 _m = (mutex_t *)*m; 351 352 if (_m->type == PTHREAD_MUTEX_NORMAL) 353 { (gdb) 354 if (!COND_LOCKED(_m)) 355 { 356 #if 0 357 printf("thread %d, mutex %p never locked, actually :p\n", GetCurrentThreadId(), m); 358 #endif 359 return mutex_unref(m, EPERM); 360 } 361 } 362 else if (!COND_LOCKED(_m) || !COND_OWNER(_m)) { 363 #if 0 (gdb) 364 printf("thread %d, mutex %p never locked or not owner, actually :p\n", GetCurrentThreadId(), m); 365 #endif 366 return mutex_unref(m,EPERM); 367 } 368 369 if (_m->type == PTHREAD_MUTEX_RECURSIVE) 370 { 371 if(InterlockedDecrement(&_m->count)) { 372 #if 0 373 printf("thread %d, mutex %p decreasing recursive\n", GetCurrentThreadId(), m); (gdb) 374 #endif 375 return mutex_unref(m,0); 376 } 377 } 378 #if 0 379 printf("thread %d,unsetting owner of mutex %p\n", GetCurrentThreadId(), m); 380 #endif 381 UNSET_OWNER(_m); 382 383 if (_m->h != NULL && !ReleaseSemaphore(_m->h, 1, NULL)) { (gdb) 384 SET_OWNER(_m); 385 #if 0 386 printf("Error, not released! thread %d, setting owner of mutex m\n", GetCurrentThreadId(), m); 387 #endif 388 /* restore our own bookkeeping */ 389 return mutex_unref(m,EPERM); 390 } 391 392 return mutex_unref(m,0); 393 } (gdb) 394 395 static WINPTHREADS_ATTRIBUTE((noinline)) int 396 _mutex_trylock(pthread_mutex_t *m) 397 { 398 int r = 0; 399 mutex_t *_m = (mutex_t *)*m; 400 401 if (_m->type != PTHREAD_MUTEX_NORMAL) 402 { 403 if (COND_LOCKED(_m)) (gdb) info locals _m = 0x3d45d0 r = <optimized out> (gdb) print m $1 = (pthread_mutex_t *) 0x830000 On Tue, Feb 11, 2014 at 10:51:49PM +0000, Sitsofe Wheeler wrote: > I can't tell if this is just a gdb quirk because I haven't hand built > winpthreads but: > > Program received signal SIGSEGV, Segmentation fault. > 0x0043e1de in pthread_mutex_unlock (m=0x790000) at > /usr/src/debug/mingw64-i686-winpthreads-3.1.0-1/src/mutex.c:392 > (gdb) list > Line number 392 out of range; > /usr/src/debug/mingw64-i686-winpthreads-3.1.0-1/src/mutex.c has 228 > lines. > > As Elliott mentioned the windowaio engine doesn't exhibit this problem > (but perhaps it causes different thread scheduling?)... > > On Tue, Feb 11, 2014 at 08:38:46AM -0700, Jens Axboe wrote: > > Interesting. The mutex issue should be fixed, I'm puzzled why it isn't. > > And especially if the sync ioengine has something to do with it. Can > > either of you dump the source around: > > > > at > > /usr/src/debug/mingw64-i686-winpthreads-3.1.0-1/src/mutex.c:392 > > > > perhaps that will clear things up a bit more? > > > > On Tue, Feb 11 2014, Elliott, Robert (Server Storage) wrote: > > > That specific command line does also crash on my Windows 2008 R2 system. It does not crash if I drop --ioengine=sync. > > > > > > > -----Original Message----- > > > > From: fio-owner@xxxxxxxxxxxxxxx [mailto:fio-owner@xxxxxxxxxxxxxxx] On > > > > Behalf Of Sitsofe Wheeler > > > > > > > > $ gdb --args ./fio.exe --debug=all --filename=fiojob --thread --size=512 -- > > > > rw=re > > > > ad --bs=512 --ioengine=sync --verify_pattern=0xdeadbeef -- > > > > name=fiojobname -- Sitsofe | http://sucs.org/~sits/ -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
