1. In addition to updating the README, I think os/windows/install.wxs needs to reference libwinpthread-1.dll instead of pthreadGC2.dll, since the wrong .dll is being copied to c:\program files\fio alongside fio.exe. I re-installed the original 2.1.4 binary, saved that file to a different directory, installed the newly built 2.1.4 with the added assert (whose installation process deletes libwinpthread-1.dll), and put that file back, and it runs.
os/windows/install.wxs: <ComponentRef Id="pthreadGC2.dll"/>
2. This is where I put the assert in mutex.c:
void fio_mutex_up(struct fio_mutex *mutex)
{
assert(mutex->magic == FIO_MUTEX_MAGIC);
pthread_mutex_lock(&mutex->lock);
read_barrier();
assert(mutex->magic == FIO_MUTEX_MAGIC); // robrob this is line 150
if (!mutex->value && mutex->waiters)
pthread_cond_signal(&mutex->cond);
mutex->value++;
pthread_mutex_unlock(&mutex->lock);
}
3. The assert does not trigger, and the same crash occurs as before.
C:\Users\Administrator\fio>c:\cygwin64\bin\gdb -args "c:/program files/fio/fio.exe" --filename=rob.t
mp --size=128m --direct=1 --rw=randread --refill_buffers --norandommap --randrepeat=0 --bs=4k --iode
pth=16 --numjobs=16 --runtime=60 --group_reporting --name=4ktest --time_based
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..
Reading symbols from /cygdrive/c/program files/fio/fio.exe...done.
(gdb) run
Starting program: /cygdrive/c/program files/fio/fio.exe --filename=rob.tmp --size=128m --direct=1 --rw=randread --refill_buffers --norandommap --randrepeat=0 --bs=4k --iodepth=16 --numjobs=16 --runtime=60 --group_reporting --name=4ktest --time_based
[New Thread 3428.0x13e0]
fio: this platform does not support process shared mutexes, forcing use of threads. Use the 'thread'
option to get rid of this warning.
4ktest: (g=0): rw=randread, bs=4K-4K/4K-4K/4K-4K, ioengine=windowsaio, iodepth=16
...
4ktest: (g=0): rw=randread, bs=4K-4K/4K-4K/4K-4K, ioengine=windowsaio, iodepth=16
fio-2.1.4
[New Thread 3428.0x10a4]
Starting 16 threads
[New Thread 3428.0x1104]
[New Thread 3428.0x1254]
[New Thread 3428.0xde8]
[New Thread 3428.0xeec]
[New Thread 3428.0xe58]
[New Thread 3428.0x13e8]
[New Thread 3428.0x4b8]
[New Thread 3428.0x13e4]
[New Thread 3428.0x7bc]
[New Thread 3428.0x1358]
[New Thread 3428.0x2f0]
[New Thread 3428.0x8dc]
[New Thread 3428.0x38c]
[New Thread 3428.0x133c]
[New Thread 3428.0x2c8]
[New Thread 3428.0x13c0]
Jobs: 0 (f=0)
Program received signal SIGSEGV, Segmentation fault.
0x0000000064943236 in pthread_mutex_unlock ()
from /cygdrive/c/program files/fio/libwinpthread-1.dll
(gdb) bt
#0 0x0000000064943236 in pthread_mutex_unlock ()
from /cygdrive/c/program files/fio/libwinpthread-1.dll
#1 0x000000000000000f in ?? ()
#2 0x0000000000422f79 in fio_mutex_up (mutex=0x305b70) at mutex.c:152
#3 0x0000000000438d71 in run_threads () at backend.c:1812
#4 0x000000000043918d in fio_backend () at backend.c:1925
#5 0x000000000044ba31 in main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>)
at fio.c:50
#6 0x00000000004013c5 in __tmainCRTStartup ()
at /usr/src/debug/mingw64-x86_64-runtime-3.0.0-1/crt/crtexe.c:332
#7 0x00000000004014e8 in mainCRTStartup ()
at /usr/src/debug/mingw64-x86_64-runtime-3.0.0-1/crt/crtexe.c:212
(gdb) f 2
#2 0x0000000000422f79 in fio_mutex_up (mutex=0x305b70) at mutex.c:152
152 pthread_cond_signal(&mutex->cond);
(gdb) p mutex
$1 = (struct fio_mutex *) 0x305b70
(gdb) p *mutex
$2 = {lock = 0x1bab1f00d, cond = 0x100000000, value = 0, waiters = 0, magic = 176}
(gdb)
> -----Original Message-----
> From: fio-owner@xxxxxxxxxxxxxxx [mailto:fio-owner@xxxxxxxxxxxxxxx] On
> Behalf Of Bruce Cran
> Sent: Friday, 10 January, 2014 12:11 AM
> To: Sitsofe Wheeler; Elliott, Robert (Server Storage)
> Cc: fio@xxxxxxxxxxxxxxx
> Subject: Re: fio 2.1.4 intermittently crashes on windows
>
>
> On 1/9/2014 10:21 PM, Sitsofe Wheeler wrote:
> > On Fri, Jan 10, 2014 at 12:37:33AM +0000, Elliott, Robert (Server Storage)
> wrote:
> >> I installed Cygwin gcc, mingwg64*, make, and a few other packages...
> >>
> >> The built fio.exe ends up complaining about a missing libpthread1-1.dll.
> >>
> >> Where do I find that? README says where to get pthreadGC2.dll, but
> >> that's apparently not the right file any more. Browsing up on that
> >> FTP site doesn't show it nearby.
> > You're right - the README is out of date. If you (re)run your Cygwin
> > setup exe then you can use its package browser to install
> > mingw[...]-winpthreads .
>
>
> Sorry - Cygwin switched from pthreads-win32 to winpthreads a couple of
> months ago and I forgot to update the README during the last set of
> changesets.
>
> --
> Bruce Cran
> --
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