Comment 0 for bug 1325503

On armhf crash files fails to retrace and gdb report '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: Bug
DistroRelease: 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)