On Thu, Feb 26, 2015 at 07:13:39PM +0100, Zoltán Herczeg wrote:
> I don't think these are related. The problem is in test2, not in test19 (the
> serialization test). Sparc64 JIT has not implemented yet. ARM 64 supports
> unaligned access, so a possible alignment issue is unusual. Perhaps the
> program counter is executing something from a wrong address.
>
> Petr, please run "gdb --args ./pcre2test -q -S 16 -8 -jit
> ./testdata/testinput2 testtry", and start the program with "r". When it
> crashes, please type "bt 10" and "disassemble $pc-128,$pc+128" and send me
> the output. I think it is enough to send me the dump privately.
>
PCRE-8.37-RC1 smashes the stack:
$ libtool --mode=execute gdb --args ./pcretest -q -S 16 -8 -s+ ./testdata/testinput2 testtry
[...]
Reading symbols from /home/test/svn-git/.libs/lt-pcretest...done.
(gdb) run
Starting program: /home/test/svn-git/.libs/lt-pcretest -q -S 16 -8 -s+ ./testdata/testinput2 testtry
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Program received signal SIGBUS, Bus error.
0x000003ffb7cc0014 in ?? ()
(gdb) bt
#0 0x000003ffb7cc0014 in ?? ()
#1 0x000003ffffffc950 in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
/proc/PID/maps shows the 0x000003ffb7cc0014 address is in an unnamed region
with rwxp permissions, and the 0x000003ffffffc950 address belongs to the
non-executable stack.
-- Petr
