FS#12441 : Sansa Clip+: a segmentation fault occurs with sim at r31101

Status Closed
Percent Complete
100%
Task Type Bugs
Category User Interface → Simulator
Assigned To No-one
Operating System Sansa AMSv2
Severity Low
Priority Very Low
Reported Version Daily build (which?)
Due in Version Undecided
Due Date Undecided
Votes
Private

Attached to Project: Rockbox
Opened by idak - 2011-12-10
Last edited by kugel. - 2011-12-19

FS#12441 - Sansa Clip+: a segmentation fault occurs with sim at r31101

A segmentation fault occurs with Sansa Clip+ sim at r31101.
Real target is all ok.
Sansa Fuze sim and real is all ok.

Closed by kugel.
2011-12-19 08:09
Reason for closing: Fixed
Additional comments about closing: Warning: Undefined array key "typography" in /home/rockbox/flyspray/plugins/dokuwiki/inc/parserutils.php on line 371 Warning: Undefined array key "camelcase" in /home/rockbox/flyspray/plugins/dokuwiki/inc/parserutils.php on line 407

r31359. Thanks Boris

Comments (6)
Related Tasks (1/0)

fg commented on 2011-12-10 14:17

Please provide more details. When does the segmention fault occur? What operating system are you using?

idak commented on 2011-12-10 14:22

Right after executing ./rockboxui, the segmentation fault occurs.
#simulator window is not displayed.
I’m using Fedora16 x86_64.

bertrik commented on 2011-12-10 14:34

I can confirm this (ubuntu 11.10 64-bit), my stacktrace is
#0 0x00007ffff7137724 in sigsuspend () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x000000000047dedb in make_context (ctx=0x8973c8, f=0×484876 <scroll_thread>,

  sp=0x8acc40 "ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336ﾭ\336", <incomplete sequence \336>..., stack_size=43008) at /home/bertrik/rockbox.git/rockbox/firmware/target/hosted/thread-unix.c:142

#2 0x000000000047e1f3 in setup_thread (context=0x107bf58) at /home/bertrik/rockbox.git/rockbox/firmware/target/hosted/thread-unix.c:277
#3 0x000000000047f001 in load_context (addr=0x107bf58) at /home/bertrik/rockbox.git/rockbox/firmware/target/hosted/thread-unix.c:303
#4 switch_thread () at /home/bertrik/rockbox.git/rockbox/firmware/thread.c:1269
#5 0x000000000047b51d in sleep (ticks=25) at /home/bertrik/rockbox.git/rockbox/firmware/kernel.c:236
#6 0x000000000040764f in init_tagcache () at /home/bertrik/rockbox.git/rockbox/apps/main.c:329
#7 0x000000000040774a in init () at /home/bertrik/rockbox.git/rockbox/apps/main.c:390
#8 0x00000000004073f1 in main (argc=1, argv=0x7fffffffe1e8) at /home/bertrik/rockbox.git/rockbox/apps/main.c:163

fg commented on 2011-12-10 14:45

bertrik: that looks more like the stack you get from the SIGUSR1 handling (which is normal).
I get

Program terminated with signal 11, Segmentation fault.
#0 memmove_ssse3 () at ../sysdeps/x86_64/multiarch/memcpy-ssse3.S:2821
2821 ../sysdeps/x86_64/multiarch/memcpy-ssse3.S: No such file or directory.
in ../sysdeps/x86_64/multiarch/memcpy-ssse3.S
(gdb) bt
#0 memmove_ssse3 () at ../sysdeps/x86_64/multiarch/memcpy-ssse3.S:2821
#1 0×0000000000475846 in move_block (ctx=0×1077720, block=0×1077640, shift=-11) at /home/fg/software/rockbox-head/firmware/buflib.c:226
#2 0x00000000004759a5 in buflib_compact (ctx=0×1077720) at /home/fg/software/rockbox-head/firmware/buflib.c:293
#3 0x0000000000475c67 in buflib_compact_and_shrink (ctx=0×1077720, shrink_hints=2147483848) at /home/fg/software/rockbox-head/firmware/buflib.c:366
#4 0×0000000000476066 in buflib_alloc_ex (ctx=0×1077720, size=25, name=0x6dacdc “battery-128x64x1.bmp”, ops=0x6c2240)

  at /home/fg/software/rockbox-head/firmware/buflib.c:514

#5 0x00000000004769e5 in core_alloc_ex (name=0x6dacdc “battery-128x64x1.bmp”, size=144, ops=0x6c2240) at /home/fg/software/rockbox-head/firmware/core_alloc.c:62
#6 0x000000000043a616 in load_skin_bmp (wps_data=0x76cd70, bitmap=0x6dad14, bmpdir=0x7fff61c47790 “/.rockbox/wps/cabbiev2”)

  at /home/fg/software/rockbox-head/apps/gui/skin_engine/skin_parser.c:1624

#7 0x000000000043a809 in load_skin_bitmaps (wps_data=0x76cd70, bmpdir=0x7fff61c47790 “/.rockbox/wps/cabbiev2”)

  at /home/fg/software/rockbox-head/apps/gui/skin_engine/skin_parser.c:1679

#8 0x000000000043b6e3 in skin_data_load (screen=SCREEN_MAIN, wps_data=0x76cd70, buf=0x7fff61c47940 “/.rockbox/wps/cabbiev2.wps”, isfile=true)

  at /home/fg/software/rockbox-head/apps/gui/skin_engine/skin_parser.c:2229

#9 0x00000000004381f2 in skin_load (skin=WPS, screen=SCREEN_MAIN, buf=0x7fff61c47940 “/.rockbox/wps/cabbiev2.wps”, isfile=true)

  at /home/fg/software/rockbox-head/apps/gui/skin_engine/skin_engine.c:174

#10 0x00000000004384c9 in skin_get_gwps (skin=WPS, screen=SCREEN_MAIN) at /home/fg/software/rockbox-head/apps/gui/skin_engine/skin_engine.c:270
#11 0×0000000000438115 in settings_apply_skins () at /home/fg/software/rockbox-head/apps/gui/skin_engine/skin_engine.c:154
#12 0x00000000004079cc in init () at /home/fg/software/rockbox-head/apps/main.c:423
#13 0×0000000000407641 in main (argc=1, argv=0x7fff61c47ca8) at /home/fg/software/rockbox-head/apps/main.c:163

idak commented on 2011-12-17 11:51

This patch is a work-around fix for the segfault.

buflib-workaround-fix.patch (0.5 KiB)

dreamlayers commented on 2011-12-18 16:58

Thanks for the work-around. It fixes the Sansa Clip+ sim in r31352. The problem does not occur in 3.10. I’m using Linux Mint Debian Edition.

It seems the problem is that buflib_compact() can successfully move a block into a hole, and then move the same block again using shift.

buflib_compact_double_move_fi... (0.4 KiB)