Re: [gphoto-devel] Problem with gphoto2 in OpenWRT

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Hi TinY,

you can fix the problem by using libusb instead of libusb-1.0. Try the 
Openwrt-Makefile attached to this mail.

Deti

On 8/20/12 2:07 AM, TinY One wrote:
> Hi Marcus,
>
> I have been stepping through the debugger and found that the program
> actually crash at the libusb_get_device_list while trying to initialise
> the camera
>
> These are the port configuration in my box
>
> ===========================
> Port Configurations
> ===========================
> root@OpenWrt:~# gphoto2 --list-ports
> Devices found: 5
> Path                             Description
> --------------------------------------------------------------
> ptpip:                           PTP/IP Connection
> serial:/dev/ttyS0                Serial Port 0
> usb:001,003                      Universal Serial Bus
> usb:001,004                      Universal Serial Bus
> usbdiskdirect:/dev/sda           USB Mass Storage direct IO
>
>
> root@OpenWrt:~# lsusb
> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 001 Device 002: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB
> Bus 001 Device 003: ID 0781:5571 SanDisk Corp.
> Bus 001 Device 004: ID 04b0:0421 Nikon Corp.
>
> This is the command I executed ==>gdbserver :9000 gphoto2
> --port=usb:001,004 --camera="Nikon DSC D90 (PTP Mode)" --summary --debug
> --debug-logfile=my-logfile.txt
>
> The initial port discovery in gphoto2 seems fine... managed to find 4
> usb devices in the gphoto2-port-info-list
>
> ===========================
> USB desc from gdb
> ===========================
> The gp_port_library_list found 4 ports
>
> Device 0
> {bLength = 18 '\022', bDescriptorType = 1 '\001', bcdUSB = 512,
> bDeviceClass = 9 '\t',
>    bDeviceSubClass = 0 '\000', bDeviceProtocol = 1 '\001',
> bMaxPacketSize0 = 64 '@', idVendor = 7531,
>    idProduct = 2, bcdDevice = 771, iManufacturer = 3 '\003', iProduct =
> 2 '\002', iSerialNumber = 1 '\001',
>    bNumConfigurations = 1 '\001'}
> Device 1
> {bLength = 18 '\022', bDescriptorType = 1 '\001', bcdUSB = 512,
> bDeviceClass = 9 '\t',
>    bDeviceSubClass = 0 '\000', bDeviceProtocol = 1 '\001',
> bMaxPacketSize0 = 64 '@', idVendor = 1507,
>    idProduct = 1544, bcdDevice = 30564, iManufacturer = 0 '\000',
> iProduct = 1 '\001', iSerialNumber = 0 '\000',
>    bNumConfigurations = 1 '\001'}
> Device 2
> {bLength = 18 '\022', bDescriptorType = 1 '\001', bcdUSB = 512,
> bDeviceClass = 0 '\000',
>    bDeviceSubClass = 0 '\000', bDeviceProtocol = 0 '\000',
> bMaxPacketSize0 = 64 '@', idVendor = 1921,
>    idProduct = 21873, bcdDevice = 290, iManufacturer = 1 '\001',
> iProduct = 2 '\002', iSerialNumber = 3 '\003',
>    bNumConfigurations = 1 '\001'}
> Device 3
> {bLength = 18 '\022', bDescriptorType = 1 '\001', bcdUSB = 512,
> bDeviceClass = 0 '\000',
>    bDeviceSubClass = 0 '\000', bDeviceProtocol = 0 '\000',
> bMaxPacketSize0 = 64 '@', idVendor = 1200,
>    idProduct = 1057, bcdDevice = 256, iManufacturer = 1 '\001', iProduct
> = 2 '\002', iSerialNumber = 3 '\003',
>    bNumConfigurations = 1 '\001'}
>
> ===========================
> Snapshot of the gphoto2 log
> ===========================
> 1.172055 gphoto2-port-info-list(2): Could not load port driver list:
> 'Unspecified error'.
> 1.192850 gphoto2-port-info-list(2): Called for filename
> '/usr/lib/libgphoto2_port/0.8.0/ptpip'.
> 1.520400 gphoto2-port-info-list(2): Loaded 'PTP/IP Connection'
> ('ptpip:') from '/usr/lib/libgphoto2_port/0.8.0/ptpip'.
> 1.547936 gphoto2-port-info-list(2): Loaded '' ('^ptpip') from
> '/usr/lib/libgphoto2_port/0.8.0/ptpip'.
> 1.574023 gphoto2-port-info-list(2): Called for filename
> '/usr/lib/libgphoto2_port/0.8.0/serial'.
> 1.917965 gphoto2-port-info-list(2): Loaded 'Serial Port 0'
> ('serial:/dev/ttyS0') from '/usr/lib/libgphoto2_port/0.8.0/serial'.
> 1.945314 gphoto2-port-info-list(2): Loaded '' ('^serial') from
> '/usr/lib/libgphoto2_port/0.8.0/serial'.
> 1.971192 gphoto2-port-info-list(2): Called for filename
> '/usr/lib/libgphoto2_port/0.8.0/usb1'.
> 2.327202 gphoto2-port-info-list(2): Loaded '' ('^usb:') from
> '/usr/lib/libgphoto2_port/0.8.0/usb1'.
> 2.353230 gphoto2-port-info-list(2): Loaded 'Universal Serial Bus'
> ('usb:001,003') from '/usr/lib/libgphoto2_port/0.8.0/usb1'.
> 2.380613 gphoto2-port-info-list(2): Loaded 'Universal Serial Bus'
> ('usb:001,004') from '/usr/lib/libgphoto2_port/0.8.0/usb1'.
> 2.407724 gphoto2-port-info-list(2): Called for filename
> '/usr/lib/libgphoto2_port/0.8.0/usbdiskdirect'.
> 2.733336 gphoto2-port-info-list(2): Loaded 'USB Mass Storage direct IO'
> ('usbdiskdirect:/dev/sda') from
> '/usr/lib/libgphoto2_port/0.8.0/usbdiskdirect'.
> 2.760780 gphoto2-port-info-list(2): Called for filename
> '/usr/lib/libgphoto2_port/0.8.0/usbscsi'.
> 3.098742 gphoto2-port-info-list(2): Counting entries (9 available)...
> 3.120579 gphoto2-port-info-list(2): 5 regular entries available.
> 3.155843 gphoto2-port-info-list(2): Looking for path 'usb:001,004' (9
> entries available)...
> 3.179534 gphoto2-port-info-list(2): Getting info of entry 3 (9
> available)...
> 3.203256 gphoto2-camera(2): Setting port info for port 'Universal Serial
> Bus' at 'usb:001,004'...
> 3.416306 gphoto2-port(2): Setting timeout to 5000 milliseconds...
> 3.436781 gphoto2-port(2): Setting settings...
> 3.453708 libusb1(2): gp_port_usb_update(old int=0, conf=-1, alt=-1),
> (new int=0, conf=-1, alt=-1)
> 3.496945 setting/gphoto2-setting.c(2): Creating $HOME/.gphoto
> 3.514409 setting/gphoto2-setting.c(2): Loading settings from file
> "/root/.gphoto/settings"
> 3.534946 gphoto2-setting(2): Setting key 'port' to value 'usb:001,004'
> (gphoto2)
> 3.561675 gphoto2-setting(2): Saving 2 setting(s) to file
> "/root/.gphoto/settings"
> 3.597505 main(2): Processing 'model' option ('Nikon DSC D90 (PTP Mode)')...
> 3.617985 gphoto2-abilities-list(2): Using ltdl to load camera libraries
> from '/usr/lib/libgphoto2/2.4.12'...
>
> However, after gphoto2 loaded the driver, during camera initialization
> the segmentation error occurs at the libusb_get_device_list (NULL,
> &devs) function, which was running fine during ports listing
>
> ===========================
> Snapshot of the gphoto2 log
> ===========================
>
> 5.040795 gp-abilities-list(2): Found 63 camera drivers.
> 29.555861 gphoto2-camera(2): Setting abilities ('Nikon DSC D90 (PTP
> mode)')...
> 29.577872 gphoto2-setting(2): Setting key 'model' to value 'Nikon DSC
> D90 (PTP mode)' (gphoto2)
> 29.605504 gphoto2-setting(2): Saving 2 setting(s) to file
> "/root/.gphoto/settings"
> 29.648197 gphoto2-camera(2): Initializing camera...
>
> ===========================
> gdb backtrace
> ===========================
> GDB command ==> ./scripts/remote-gdb 192.168.3.1:9000
> <http://192.168.3.1:9000>
> ./staging_dir/target-mips_r2_uClibc-0.9.33.2/root-ar71xx/usr/bin/gphoto2
>
> Using target mips_r2 (uClibc-0.9.33.2)
> GNU gdb (Linaro GDB) 7.2-2011.03-0
> Copyright (C) 2010 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 "--host=i686-linux-gnu
> --target=mips-openwrt-linux-uclibc".
> For bug reporting instructions, please see:
> <http://bugs.launchpad.net/gdb-linaro/>...
> Reading symbols from
> /home/XXX/openwrt/trunk/staging_dir/target-mips_r2_uClibc-0.9.33.2/root-ar71xx/usr/bin/gphoto2...done.
> warning: Can not parse XML target description; XML support was disabled
> at compile time
> 0x770f2f60 in _start () from
> /home/XXX/openwrt/trunk/scripts/../staging_dir/target-mips_r2_uClibc-0.9.33.2/root-ar71xx/lib/ld-uClibc.so.0
> (gdb) b libusb1.c:99
> No source file named libusb1.c.
> Make breakpoint pending on future shared library load? (y or [n]) y
> Breakpoint 1 (libusb1.c:99) pending.
> (gdb) c
> Continuing.
>
> ============================
> + device listing OK during port listing +
> ============================
> Breakpoint 1, load_devicelist () at libusb1.c:99
> 99            nrofdevs = libusb_get_device_list (NULL, &devs);
> (gdb) c
> Continuing.
> warning: Temporarily disabling breakpoints for unloaded shared library
> "/home/XXX/openwrt/trunk/scripts/../staging_dir/target-mips_r2_uClibc-0.9.33.2/root-ar71xx/usr/lib/libgphoto2_port/0.8.0/usb1.so"
>
> ===================================
> + device listing FAILED when initialing camera +
> ===================================
> Breakpoint 1, load_devicelist () at libusb1.c:99
> 99            nrofdevs = libusb_get_device_list (NULL, &devs);
> (gdb) c
> Continuing.
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x770aaa6c in pthread_mutex_lock ()
>     from
> /home/XXX/openwrt/trunk/scripts/../staging_dir/target-mips_r2_uClibc-0.9.33.2/root-ar71xx/lib/libpthread.so.0
> (gdb) bt
> #0  0x770aaa6c in pthread_mutex_lock ()
>     from
> /home/XXX/openwrt/trunk/scripts/../staging_dir/target-mips_r2_uClibc-0.9.33.2/root-ar71xx/lib/libpthread.so.0
> #1  0x76e16aa4 in usbi_get_device_by_session_id ()
>     from
> /home/XXX/openwrt/trunk/scripts/../staging_dir/target-mips_r2_uClibc-0.9.33.2/root-ar71xx/usr/lib/libusb-1.0.so.0
> #2  0x76e1ee48 in enumerate_device ()
>     from
> /home/XXX/openwrt/trunk/scripts/../staging_dir/target-mips_r2_uClibc-0.9.33.2/root-ar71xx/usr/lib/libusb-1.0.so.0
> #3  0x76e1f234 in op_get_device_list ()
>     from
> /home/XXX/openwrt/trunk/scripts/../staging_dir/target-mips_r2_uClibc-0.9.33.2/root-ar71xx/usr/lib/libusb-1.0.so.0
> #4  0x76e16e14 in libusb_get_device_list ()
>     from
> /home/XXX/openwrt/trunk/scripts/../staging_dir/target-mips_r2_uClibc-0.9.33.2/root-ar71xx/usr/lib/libusb-1.0.so.0
> #5  0x76e32cd8 in load_devicelist () at libusb1.c:99
> #6  0x76e3336c in gp_port_usb_find_device_lib (port=0x9a92f8,
> idvendor=1200, idproduct=1057) at libusb1.c:769
> #7  0x76f40880 in gp_port_usb_find_device (port=<value optimized out>,
> idvendor=<value optimized out>, idproduct=<value optimized out>)
>      at gphoto2-port.c:808
> #8  0x76f5b470 in gp_camera_init (camera=0x9a8018, context=0x9aa0c0) at
> gphoto2-camera.c:739
> #9  0x76f5eeb0 in gp_camera_get_summary (camera=0x9a8018,
> summary=0x7f985b60, context=0x9aa0c0) at gphoto2-camera.c:888
> #10 0x00407b1c in action_camera_summary (params=<value optimized out>)
> at actions.c:797
> #11 0x0040d9e0 in cb_arg_run (ctx=<value optimized out>, reason=<value
> optimized out>, opt=0x7f98e1e4, arg=0x9ab220 "Nikon DSC D90 (PTP Mode)",
>      data=0x7f98dd40) at main.c:1444
> #12 cb_arg (ctx=<value optimized out>, reason=<value optimized out>,
> opt=0x7f98e1e4, arg=0x9ab220 "Nikon DSC D90 (PTP Mode)", data=0x7f98dd40)
>      at main.c:1568
> #13 0x76f0fa50 in invokeCallbacksOPTION ()
>     from
> /home/XXX/openwrt/trunk/scripts/../staging_dir/target-mips_r2_uClibc-0.9.33.2/root-ar71xx/usr/lib/libpopt.so.0
> #14 0x76f0f9c0 in invokeCallbacksOPTION ()
>     from
> /home/XXX/openwrt/trunk/scripts/../staging_dir/target-mips_r2_uClibc-0.9.33.2/root-ar71xx/usr/lib/libpopt.so.0
> #15 0x76f10c1c in poptGetNextOpt ()
>     from
> /home/XXX/openwrt/trunk/scripts/../staging_dir/target-mips_r2_uClibc-0.9.33.2/root-ar71xx/usr/lib/libpopt.so.0
> #16 0x004058a8 in main (argc=6, argv=0x7f990ac4, envp=<value optimized
> out>) at main.c:2184
> (gdb) c
> Continuing.
>
> Program terminated with signal SIGSEGV, Segmentation fault.
> The program no longer exists.
>
>
> Any hints on how to proceed?
>
>
> On Mon, Aug 20, 2012 at 1:19 AM, Marcus Meissner <mei...@su...
> <mailto:mei...@su...>> wrote:
>
>     On Sun, Aug 19, 2012 at 11:56:09AM +0800, Ong Tat Yeong wrote:
>      > Hi Marcus,
>      >
>      > Thanks for replying ;)
>      >
>      > Managed to get some backtrace from my box.
>      >
>      > Do you think it's suggesting that I should be looking at the
>      > libgphoto2-drivers?
>
>
>      > Thanks, TinY
>      >
>      > Program received signal SIGSEGV, Segmentation fault.
>      > 0x7705c64c in __pthread_initialize_minimal_internal () from
>      >
>     /home/XXX/openwrt/trunk/scripts/../staging_dir/target-mips_r2_uClibc-0.9.33.2/root-ar71xx/lib/libpthread.so.0
>      > (gdb) bt
>      > #0  0x7705c64c in __pthread_initialize_minimal_internal () from
>      >
>     /home/XXX/openwrt/trunk/scripts/../staging_dir/target-mips_r2_uClibc-0.9.33.2/root-ar71xx/lib/libpthread.so.0
>      > #1  0x76d93e48 in enumerate_device ()
>
>     It crashes during pthread initialization...
>
>     I am not sure if we need to set up pthreads before starting up
>     gphoto2 ourselves, but
>     in general this should not crash, as basically the same code is used
>     in regular x86 Linux too.
>
>     Ciao, Marcus
>
>
>
>
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