$ gcc -v
Using built-in specs.
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-libgcj-multifile
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk
--disable-dssi --enable-plugin
--with-java-home=/usr/lib/jvm/java-1.4.2-gcj-1.4.2.0/jre --with-cpu=generic
--host=x86_64-redhat-linux
Thread model: posix
gcc version 4.1.1 20061011 (Red Hat 4.1.1-30)
GNU C Library stable release version 2.7, by Roland McGrath et al.
GNU gdb Red Hat Linux (6.5-8.fc6rh)
+++ This bug was initially created as a clone of Bug #36568 +++
test w/o threads:
$ ./u
0x400a74 handler+0x1a
0x400a95 crash+0x10
0x400afd main+0x60
0x7fa92f9e74a4 __libc_start_main+0xf4
test w/ threads:
$ ./u threaded
0x400a74 handler+0x1a
0x400a95 crash+0x10
0x7fcea7803a3d clone+0x6d
0x7fcea7803a3d clone+0x6d
0x7fcea7803a3d clone+0x6d
0x7fcea7803a3d clone+0x6d
0x7fcea7803a3d clone+0x6d
0x7fcea7803a3d clone+0x6d
0x7fcea7803a3d clone+0x6d
0x7fcea7803a3d clone+0x6d
0x7fcea7803a3d clone+0x6d
(...)
gdb stops unwinding at clone():
$ gdb ./u
(gdb) set args threaded
(gdb) r
(...)
[New Thread 0x7fdd9636b6f0 (LWP 7318)]
[New Thread 0x42501950 (LWP 7322)]
(...)
Breakpoint 2, handler (signalNumber=11) at u.c:25
25 _Unwind_Backtrace( helper, 0 );
(gdb) bt
#0 handler (signalNumber=11) at u.c:25
#1 <signal handler called>
#2 0x0000000000400a95 in crash () at u.c:32
#3 0x00007fa0eef04070 in start_thread () from /lib64/libpthread.so.0
#4 0x00007fa0eea6da3d in clone () from /lib64/libc.so.6
gcc-4.2.4-1.x86_64
glibc-2.8-3.x86_64
gdb-6.8-1.x86_64
--
Summary: infinite _Unwind_Backtrace / thread stack unwinding.
Product: gcc
Version: 4.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: vinutheraj at gmail dot com
GCC target triplet: x86_64-gnu-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36621
