hdh@gunship [23:45:39]:~/e1/KDE4-trunk/bag/backtraces/testcase
$ valgrind -v ./testcase
==8987== Memcheck, a memory error detector.
==8987== Copyright (C) 2002-2007, and GNU GPL'd, by Julian Seward et al.
==8987== Using LibVEX rev 1732, a library for dynamic binary translation.
==8987== Copyright (C) 2004-2007, and GNU GPL'd, by OpenWorks LLP.
==8987== Using valgrind-3.2.3-Debian, a dynamic binary instrumentation framework.
==8987== Copyright (C) 2000-2007, and GNU GPL'd, by Julian Seward et al.
==8987==
--8987-- Command line
--8987--    ./testcase
--8987-- Startup, with flags:
--8987--    -v
--8987-- Contents of /proc/version:
--8987--   Linux version 2.6.22-11-generic (buildd@yellow) (gcc version 4.1.3 20070831 (prerelease) (Ubuntu 4.1.2-16ubuntu1)) #1 SMP Mon Sep 17 03:18:44 GMT 2007
--8987-- Arch and hwcaps: AMD64, amd64-sse2
--8987-- Page sizes: currently 4096, max supported 4096
--8987-- Valgrind library directory: /usr/lib/valgrind
--8987-- Reading syms from /home/hdh/e1/KDE4-trunk/bag/backtraces/testcase/testcase (0x400000)
--8987-- Reading syms from /lib/ld-2.6.1.so (0x4000000)
--8987-- Reading debug info from /lib/ld-2.6.1.so...
--8987-- ... CRC mismatch (computed F18656F0 wanted 247B0180)
--8987--    object doesn't have a symbol table
--8987-- Reading syms from /usr/lib/valgrind/amd64-linux/memcheck (0x38000000)
--8987--    object doesn't have a dynamic symbol table
--8987-- Reading suppressions file: /usr/lib/valgrind/default.supp
vex amd64->IR: unhandled instruction bytes: 0x66 0x66 0x66 0x66
==8987== valgrind: Unrecognised instruction at address 0x4016321.
==8987== Your program just tried to execute an instruction that Valgrind
==8987== did not recognise.  There are two possible reasons for this.
==8987== 1. Your program has a bug and erroneously jumped to a non-code
==8987==    location.  If you are running Memcheck and you just saw a
==8987==    warning about a bad jump, it's probably your program's fault.
==8987== 2. The instruction is legitimate but Valgrind doesn't handle it,
==8987==    i.e. it's Valgrind's fault.  If you think this is the case or
==8987==    you are not sure, please let us know and we'll try to fix it.
==8987== Either way, Valgrind will now raise a SIGILL signal which will
==8987== probably kill your program.
==8987==
==8987== Process terminating with default action of signal 4 (SIGILL)
==8987==  Illegal opcode at address 0x4016321
==8987==    at 0x4016321: (within /lib/ld-2.6.1.so)
==8987==    by 0x4007909: (within /lib/ld-2.6.1.so)
==8987==    by 0x4007C65: (within /lib/ld-2.6.1.so)
==8987==    by 0x4003329: (within /lib/ld-2.6.1.so)
==8987==    by 0x4014457: (within /lib/ld-2.6.1.so)
==8987==    by 0x400230A: (within /lib/ld-2.6.1.so)
==8987==    by 0x4000A67: (within /lib/ld-2.6.1.so)
==8987==
==8987== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
==8987== malloc/free: in use at exit: 0 bytes in 0 blocks.
==8987== malloc/free: 0 allocs, 0 frees, 0 bytes allocated.
==8987==
==8987== All heap blocks were freed -- no leaks are possible.
--8987--  memcheck: sanity checks: 0 cheap, 1 expensive
--8987--  memcheck: auxmaps: 0 auxmap entries (0k, 0M) in use
--8987--  memcheck: auxmaps: 0 searches, 0 comparisons
--8987--  memcheck: SMs: n_issued      = 7 (112k, 0M)
--8987--  memcheck: SMs: n_deissued    = 0 (0k, 0M)
--8987--  memcheck: SMs: max_noaccess  = 524287 (8388592k, 8191M)
--8987--  memcheck: SMs: max_undefined = 0 (0k, 0M)
--8987--  memcheck: SMs: max_defined   = 1 (16k, 0M)
--8987--  memcheck: SMs: max_non_DSM   = 7 (112k, 0M)
--8987--  memcheck: max sec V bit nodes:    0 (0k, 0M)
--8987--  memcheck: set_sec_vbits8 calls: 0 (new: 0, updates: 0)
--8987--  memcheck: max shadow mem size:   4256k, 4M
--8987-- translate:            fast SP updates identified: 117 ( 88.6%)
--8987-- translate:   generic_known SP updates identified: 10 (  7.5%)
--8987-- translate: generic_unknown SP updates identified: 5 (  3.7%)
--8987--     tt/tc: 644 tt lookups requiring 643 probes
--8987--     tt/tc: 644 fast-cache updates, 2 flushes
--8987--  transtab: new        322 (6,973 -> 117,968; ratio 169:10) [0 scs]
--8987--  transtab: dumped     0 (0 -> ??)
--8987--  transtab: discarded  0 (0 -> ??)
--8987-- scheduler: 808 jumps (bb entries).
--8987-- scheduler: 0/328 major/minor sched events.
--8987--    sanity: 1 cheap, 1 expensive checks.
--8987--    exectx: 30,011 lists, 0 contexts (avg 0 per list)
--8987--    exectx: 0 searches, 0 full compares (0 per 1000)
--8987--    exectx: 0 cmp2, 0 cmp4, 0 cmpAll
Illegal instruction (core dumped)