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[Bug 1325503] Re: gdb reports 'corrupt stack' on armhf without symbols

To: touch-packages@xxxxxxxxxxxxxxxxxxx
From: Thomas Karl Pietrowski <1325503@xxxxxxxxxxxxxxxxxx>
Date: Tue, 22 Dec 2015 08:56:28 -0000
Reply-to: Bug 1325503 <1325503@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
I also see a lot of these errors here on Wily at KDE Plasma:

Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1".
__libc_do_syscall () at ../sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:46
[Current thread is 1 (Thread 0xb2ad9000 (LWP 4363))]

Thread 14 (Thread 0xb076a3e0 (LWP 4365)):
#0  __libc_do_syscall () at ../sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:46
#1  0xb55706b0 in __pthread_cond_wait (cond=0xc0560, mutex=0xc0548) at pthread_cond_wait.c:186
#2  0xb2296592 in ?? () from /usr/lib/arm-linux-gnueabihf/dri/swrast_dri.so
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 13 (Thread 0xaff6a3e0 (LWP 4366)):
#0  __libc_do_syscall () at ../sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:46
#1  0xb55706b0 in __pthread_cond_wait (cond=0xc0668, mutex=0xc0650) at pthread_cond_wait.c:186
#2  0xb2296592 in ?? () from /usr/lib/arm-linux-gnueabihf/dri/swrast_dri.so
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 12 (Thread 0xaf76a3e0 (LWP 4367)):
#0  __libc_do_syscall () at ../sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:46
#1  0xb55706b0 in __pthread_cond_wait (cond=0xc0770, mutex=0xc0758) at pthread_cond_wait.c:186
#2  0xb2296592 in ?? () from /usr/lib/arm-linux-gnueabihf/dri/swrast_dri.so
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 11 (Thread 0xaef6a3e0 (LWP 4368)):
#0  __libc_do_syscall () at ../sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:46
#1  0xb55706b0 in __pthread_cond_wait (cond=0xc0878, mutex=0xc0860) at pthread_cond_wait.c:186
#2  0xb2296592 in ?? () from /usr/lib/arm-linux-gnueabihf/dri/swrast_dri.so
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 10 (Thread 0xae7143e0 (LWP 4369)):
#0  0xb56904e0 in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0xb6bb4168 in ?? () from /usr/lib/arm-linux-gnueabihf/libxcb.so.1
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 9 (Thread 0xad1c43e0 (LWP 4377)):
#0  0xb5a03d80 in QTimerInfoList::timerWait(timespec&) () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
#1  0xb5a04c52 in ?? () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
#2  0xb4fb0c54 in g_main_context_prepare () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
#3  0xb4fb12ee in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 8 (Thread 0xaad3d3e0 (LWP 4378)):
#0  __libc_do_syscall () at ../sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:47
#1  0xb56a011a in __GI___clock_gettime (clock_id=0, tp=0xaad3cbec) at ../sysdeps/unix/clock_gettime.c:99
#2  0xb59095b2 in ?? () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 7 (Thread 0xa8fe23e0 (LWP 4386)):
#0  0xb4fb13c2 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 6 (Thread 0xa7dff3e0 (LWP 4387)):
#0  0xb56904e2 in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0xb4fb137a in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 5 (Thread 0xa6a3e3e0 (LWP 4388)):
#0  __libc_do_syscall () at ../sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:46
#1  0xb55706b0 in __pthread_cond_wait (cond=0xb6f23dd0, mutex=0xb6f23db8) at pthread_cond_wait.c:186
#2  0xb6ebfe76 in ?? () from /usr/lib/arm-linux-gnueabihf/libQt5Script.so.5
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 4 (Thread 0xa4eff3e0 (LWP 4389)):
#0  __libc_do_syscall () at ../sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:47
#1  0xb56a011a in __GI___clock_gettime (clock_id=0, tp=0xa4efebb4) at ../sysdeps/unix/clock_gettime.c:99
#2  0xb59095b2 in ?? () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 3 (Thread 0xa40633e0 (LWP 4391)):
#0  __libc_do_syscall () at ../sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:46
#1  0xb55706b0 in __pthread_cond_wait (cond=0x32e118, mutex=0x32e100) at pthread_cond_wait.c:186
#2  0xb58a52f8 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
#3  0xb69b710a in ?? () from /usr/lib/arm-linux-gnueabihf/libQt5Quick.so.5
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 2 (Thread 0x9c9723e0 (LWP 4393)):
#0  0xb56744e0 in nanosleep () at ../sysdeps/unix/syscall-template.S:81
#1  0xb56742bc in __sleep (seconds=0) at ../sysdeps/unix/sysv/linux/sleep.c:138
#2  0xb6f77864 in ?? () from /usr/lib/arm-linux-gnueabihf/libKF5Crash.so.5
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 1 (Thread 0xb2ad9000 (LWP 4363)):
#0  __libc_do_syscall () at ../sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:46
#1  0xb55706b0 in __pthread_cond_wait (cond=0x135a428, mutex=0x135a410) at pthread_cond_wait.c:186
#2  0xb58a52f8 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
#3  0xb69b4e4e in ?? () from /usr/lib/arm-linux-gnueabihf/libQt5Quick.so.5
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

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https://bugs.launchpad.net/bugs/1325503

Title:
  gdb reports 'corrupt stack' on armhf without symbols

Status in Linaro GDB:
  New
Status in gdb package in Ubuntu:
  Triaged

Bug description:
  [Test Case]
  sleep 120 &
  kill -SEGV %1

  Observe a corrupt stack in the generated crash file.

  Original Report
  ---------------
  On armhf crash files fail to retrace and gdb reports 'corrupt stack' errors

  For example bug 1323241
  Thread 1 (Thread 0xb0b3b450 (LWP 2243)):
  #0  0x00000030 in ?? ()
  No symbol table info available.
  #1  0xa9990cbe in ?? () from /usr/lib/arm-linux-gnueabihf/unity8/qml/Unity/Launcher/libUnityLauncher-qml.so
  No symbol table info available.
  Backtrace stopped: previous frame identical to this frame (corrupt stack?)

  I also tried directly on the device to run an unstripped and stripped
  build of cat and gdb fails to unwind the stack when the binary is
  stripped. The result of this test is:

  == unstripped ==
  Reading symbols from ./cat...done.
  (gdb) run
  Starting program: /home/phablet/tmp/coreutils-8.21/src/cat
  ^C
  Program received signal SIGINT, Interrupt.
  0xb6f6e914 in read () from /lib/arm-linux-gnueabihf/libc.so.6
  (gdb) bt
  #0  0xb6f6e914 in read () from /lib/arm-linux-gnueabihf/libc.so.6
  #1  0x0000b648 in read (__nbytes=65536, __buf=0x19000, __fd=0) at /usr/include/arm-linux-gnueabihf/bits/unistd.h:44
  #2  safe_read (fd=0, buf=buf@entry=0x19000, count=count@entry=65536) at lib/safe-read.c:66
  #3  0x00009ace in simple_cat (bufsize=65536, buf=0x19000 "") at src/cat.c:168
  #4  main (argc=1, argv=<optimized out>) at src/cat.c:730
  (gdb) quit

  == stripped ==
  Reading symbols from ./cat...(no debugging symbols found)...done.
  (gdb) run
  Starting program: /home/phablet/tmp/coreutils-8.21/src/cat
  ^C
  Program received signal SIGINT, Interrupt.
  0xb6f6e914 in read () from /lib/arm-linux-gnueabihf/libc.so.6
  (gdb) bt
  #0  0xb6f6e914 in read () from /lib/arm-linux-gnueabihf/libc.so.6
  #1  0x0000b648 in ?? ()
  Backtrace stopped: previous frame identical to this frame (corrupt stack?)

  I'd expect the same number of frames and addresses when the binary is
  stripped or not with '??' instead of names when it is stripped.

  ProblemType: BugDistroRelease: Ubuntu 14.10
  Package: gdb (not installed)
  Uname: Linux 3.4.0-5-mako armv7l
  ApportVersion: 2.14.3-0ubuntu1
  Architecture: armhf
  Date: Mon Jun  2 11:07:07 2014
  InstallationDate: Installed on 2014-06-02 (0 days ago)
  InstallationMedia: Ubuntu Utopic Unicorn (development branch) - armhf (20140602)SourcePackage: gdb
  UpgradeStatus: No upgrade log present (probably fresh install)

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