Johan Ström <johan <at> stromnet.se> writes:
>
> What does debug logging reveal? Configure & build with "--enable-debug
> --enable-owtraffic" and then running with "--foreground --debug" usually
> gives a very verbose idea on what's going on.
Nope on both counts:
# /usr/bin/owserver -c /etc/owfs.conf --nozero --foreground --debug
DEBUG MODE
libow version:
3.1p0
Segmentation fault
#
> Is the stacktrace always ending up in libusb? Could possibly indicate
> duplicate libusb_close calls or something related to libusb, which had a
> few changes lately.
>
The stack trace ends with not finding libdns_sd, and then ..:
[pid 10178] open("/usr/lib/libdns_sd.so", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No
such file or directory)
[pid 10178] stat64("/usr/lib", {st_mode=S_IFDIR|0755, st_size=12288, ...}) =
0
[pid 10178] munmap(0xb5c45000, 51127) = 0
[pid 10178] recvmsg(3, <unfinished ...>
[pid 10180] read(11, <unfinished ...>
[pid 10178] <... recvmsg resumed> 0xbed20844, 0) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 10178] open("/dev/bus/usb/001/005", O_RDWR) = 12
[pid 10178] ioctl(12, SNDRV_CTL_IOCTL_TLV_READ or USBDEVFS_GET_CAPABILITIES,
0xb6f000) = 0
[pid 10178] write(7, "\1", 1) = 1
[pid 10178] read(6, "\1", 1) = 1
[pid 10178] ioctl(12, USBDEVFS_GETDRIVER, 0xbed227f8) = 0
[pid 10178] ioctl(12, USBDEVFS_SETCONFIGURATION <unfinished ...>
Process 10179 attached
[pid 10179] set_robust_list(0xb6c514d0, 12) = 0
[pid 10179] poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}], 2, -1
<unfinished ...>
[pid 10178] <... ioctl resumed> , 0xbed22904) = -1 EBUSY (Device or resource
busy)
[pid 10178] write(7, "\1", 1) = 1
[pid 10178] read(6, "\1", 1) = 1
[pid 10178] close(12) = 0
[pid 10178] ioctl(12, SNDRV_CTL_IOCTL_ELEM_READ or USBDEVFS_IOCTL,
0xbed2299c) = -1 EBADF (Bad file descriptor)
[pid 10178] write(7, "\1", 1) = 1
[pid 10178] read(6, "\1", 1) = 1
[pid 10178] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0} --
-
[pid 10179] +++ killed by SIGSEGV +++
[pid 10180] +++ killed by SIGSEGV +++
+++ killed by SIGSEGV +++
Segmentation fault
… which looks like it's a different fault point than the backtrace I've
posted in my last message, as this has three threads instead of two.
-- Matthias Urlichs
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