Hi, Am 29.11.2012 16:17, schrieb Dieter Bloms: > Hello, > > I've compiled vdr on alpinelinux 2.5.0 and get a segfault during > start of vdr. > Even without plugins I get this segfault (I didn't apply any patch to > vdr sources). > Vdr was started with the command: > > /usr/local/bin/vdr --config=/etc/vdr --epgfile=/tmp/epg.data --grab=/dev/shm --log=3.1 --mute --no-kbd --user=root --video=/remote/vdr/ > > I've made a backtrace with gdb: > > --snip-- > vdrservernew:/tmp# gdb --core core /usr/local/bin/vdr > GNU gdb (GDB) 7.5 > Copyright (C) 2012 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 "x86_64-unknown-linux-gnu". > For bug reporting instructions, please see: > <http://www.gnu.org/software/gdb/bugs/>... > Reading symbols from /usr/local/bin/vdr...done. > [New LWP 26493] > [New LWP 26492] > [New LWP 26494] > [Thread debugging using libthread_db enabled] > Using host libthread_db library "/lib/libthread_db.so.1". > Core was generated by `/usr/local/bin/vdr --config=/etc/vdr --epgfile=/tmp/epg.data --grab=/dev/shm --'. > Program terminated with signal 11, Segmentation fault. > #0 skipspace (s=0x40800000 <Address 0x40800000 out of bounds>) at tools.h:196 > 196 if ((uchar)*s > ' ') // most strings don't have any leading space, so handle this case as fast as possible > (gdb) bt > #0 skipspace (s=0x40800000 <Address 0x40800000 out of bounds>) at tools.h:196 > #1 isempty (s=0x40800000 <Address 0x40800000 out of bounds>) at tools.c:249 > #2 0x00000000004a1eb9 in FromString (s=0x2e531d2 "1 01 deu 4:3", this=0x2e4aba0) at epg.c:36 Looks like the pointer returned by sscanf is not valid: 32: bool tComponent::FromString(const char *s) 33: { 34: unsigned int Stream, Type; 35: int n = sscanf(s, "%X %02X %7s %a[^\n]", &Stream, &Type, language, &description); // 7 = MAXLANGCODE2 - 1 36: if (n != 4 || isempty(description)) { 37: free(description); 38: description = NULL; 39: } 40: stream = Stream; 41: type = Type; 42: return n >= 3; 43: } What I would do: - set description to NULL before the sscanf - log all values returned by sscanf and compare it with the given string Maybe a problem/different behaviour in the uClibc? Lars. > #3 cComponents::SetComponent (this=<optimized out>, Index=0, s=s@entry=0x2e531d2 "1 01 deu 4:3") at epg.c:81 > #4 0x00000000004a40f3 in cEvent::Parse (this=0x2e43360, s=<optimized out>) at epg.c:495 > #5 0x00000000004e9ea6 in cRecordingInfo::Read (this=0x2e2d110, f=f@entry=0x2e2c330) at recording.c:468 > #6 0x00000000004eb4e3 in cRecording::cRecording (this=0x2e2c650, FileName=0x2e4c15c "Sex_and_the_City_2/2012-11-19.20.10.27-0.rec") at recording.c:723 > #7 0x00000000004eceb1 in cRecordings::ScanVideoDir (this=0x7fe7c0 <Recordings>, DirName=0x2e412b0 "/remote/vdr/Sex_and_the_City_2", Foreground=false, LinkLevel=0) at recording.c:1165 > #8 0x00000000004ed32c in cRecordings::ScanVideoDir (this=0x7fe7c0 <Recordings>, DirName=0x2e25ff0 "/remote/vdr", Foreground=false, LinkLevel=0) at recording.c:1180 > #9 0x000000000052694e in cThread::StartThread (Thread=0x7fe7e0 <Recordings+32>) at thread.c:262 > #10 0x00006e6b7ce69406 in start_thread () from /lib/libpthread.so.0.9.32 > #11 0x00006e6b7ce61885 in clone () from /lib/libpthread.so.0.9.32 > #12 0x0000000000000000 in ?? () > --snip-- > > does anybody see what is wrong here ? > > _______________________________________________ vdr mailing list vdr@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
