[Gdal-dev] ECW Still hanging - is running on SMP a problem?

[James Browne]

Hi all,

After a few tweaks and tries, the latest ECW SDK 3.2 beta is building nicely and GDAL 1.3 builds against it.

However, now it hangs every time, even compiled as debug. It seems to hang at the first spawn.

I am running a dual Pentium 2.6G box with Debian Sarge as the OS. Is anyone else trying to run this on a Linux based SMP, and is that making threading break?

I will not have time to study this more for a few days. Any ideas will be appreciated greatly.

    Thanks
                    Jim


I tested using both gdal_translate and gdalinfo and the debugging output was the same:

GNU gdb 6.3-debian
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-linux"...Using host libthread_db library "/lib/libthread_db.so.1".

(gdb) run --debug ON April1994_raw.ecw
Starting program: /usr/local/bin/gdalinfo --debug ON /home/samba/basemap/images/4_94coast/2foot_as_1ft_ecw/April1994_raw.ecw
[Thread debugging using libthread_db enabled]
[New Thread 16384 (LWP 12685)]
[New Thread 32769 (LWP 12686)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 32769 (LWP 12686)]
0x4058a150 in pthread_handle_create () from /lib/libpthread.so.0
(gdb) bt
#0  0x4058a150 in pthread_handle_create () from /lib/libpthread.so.0
#1  0x40589c18 in __pthread_manager () from /lib/libpthread.so.0
#2  0x40589d57 in __pthread_manager_event () from /lib/libpthread.so.0
#3  0x40bf992a in clone () from /lib/libc.so.6
(gdb) s
Single stepping until exit from function pthread_handle_create,
which has no line number information.

<CTR-C>

Program received signal SIGINT, Interrupt.
[Switching to Thread 16384 (LWP 12685)]
0x4058c604 in __pthread_sigsuspend () from /lib/libpthread.so.0
(gdb) bt
#0  0x4058c604 in __pthread_sigsuspend () from /lib/libpthread.so.0
#1  0x4058c3c8 in __pthread_wait_for_restart_signal () from /lib/libpthread.so.0
#2  0x4058bc42 in pthread_create@@GLIBC_2.1 () from /lib/libpthread.so.0
#3  0x40c7b2c0 in NCSThreadSpawn (pThread=0x407c4c84, pFunc=0x40c74b74 <CNCSThread::ThreadFunc(void*)>, pData=0x407c4c80,
    bCreateSuspended=0) at ../../thread.c:390
#4  0x40c74d6f in CNCSThread::Spawn (this=0x407c4c80, pData=0x0, bCreateSuspended=false) at ../../NCSThread.cpp:52
#5  0x406d0d79 in CNCSJP2FileView (this=0x80534d8) at ../../../NCSJP2/NCSJP2FileView.cpp:52
#6  0x4068ccc3 in CNCSFile (this=0x80534d8) at ../../NCSFile.cpp:57
#7  0x400f6d86 in ECWDataset::Open () from /usr/local/lib/libgdal.so.1
#8  0x400f6c0c in ECWDataset::OpenECW () from /usr/local/lib/libgdal.so.1
#9  0x401b432f in GDALOpen () from /usr/local/lib/libgdal.so.1
#10 0x08049951 in main ()


$ gdal-config --formats
gxf gtiff hfa aigrid aaigrid ceos ceos2 iso8211 xpm sdts raw dted mem jdem envisat elas fit vrt usgsdem l1b nitf bmp pcidsk airsar rs2 ilwis rmf rik bsb ecw jpeg2000 hdf4 gif jpeg png
$ gdal-config --version
1.3.0