c++/5246: g++ 3.0.3: exception throw crash when -O -fomit-frame-pointer

[eru at netti dot fi]

>Number:         5246
>Category:       c++
>Synopsis:       g++ 3.0.3: exception throw crash when -O -fomit-frame-pointer
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          wrong-code
>Submitter-Id:   net
>Arrival-Date:   Wed Jan 02 07:36:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Erkki Ruohtula (eru@netti.fi)
>Release:        3.0.3
>Organization:
>Environment:
Linux on Pentium II (Red Hat 7.1)
>Description:
This is a re-report of my earlier problem report 4955 for GCC 3.0.2, which was
marked closed, but the problem seems to persist in GCC 3.0.3.
Exception throwing through multiple levels of catch+throw
crashes, if the combination of some -O option and -fomit-frame-pointer
is used. Either alone works. A short self-contained test program attached.
>How-To-Repeat:
$ g++ -v -O -fomit-frame-pointer except-bug.cpp
Reading specs from /opt/gcc/linux/ix86/gcc_3.0.3/lib/gcc-lib/i686-pc-linux-gnu/3.0.3/specs
Configured with: /usr/local/src/gcc-3.0.3/configure --prefix=/opt/gcc/linux/ix86/gcc_3.0.3 --enable-shared --enable-threads
Thread model: posix
gcc version 3.0.3
 /opt/gcc/linux/ix86/gcc_3.0.3/lib/gcc-lib/i686-pc-linux-gnu/3.0.3/cc1plus -v -D__GNUC__=3 -D__GNUC_MINOR__=0 -D__GNUC_PATCHLEVEL__=3 -D__ELF__ -Dunix -Dlinux -D__ELF__ -D__unix__ -D__linux__ -D__unix -D__linux -Asystem=posix -D__OPTIMIZE__ -D__STDC_HOSTED__=1 -D_GNU_SOURCE -Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i686__ -D__tune_pentiumpro__ except-bug.cpp -D__GNUG__=3 -D__GXX_DEPRECATED -D__EXCEPTIONS -D__GXX_ABI_VERSION=100 -quiet -dumpbase except-bug.cpp -O -version -fomit-frame-pointer -o /tmp/ccq59N2w.s
GNU CPP version 3.0.3 (cpplib) (i386 Linux/ELF)
GNU C++ version 3.0.3 (i686-pc-linux-gnu)
        compiled by GNU C version 3.0.3.
ignoring nonexistent directory "/opt/gcc/linux/ix86/gcc_3.0.3/i686-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /opt/gcc/linux/ix86/gcc_3.0.3/include/g++-v3
 /opt/gcc/linux/ix86/gcc_3.0.3/include/g++-v3/i686-pc-linux-gnu
 /opt/gcc/linux/ix86/gcc_3.0.3/include/g++-v3/backward
 /usr/local/include
 /opt/gcc/linux/ix86/gcc_3.0.3/lib/gcc-lib/i686-pc-linux-gnu/3.0.3/include
 /usr/include
End of search list.
 as --traditional-format -V -Qy -o /tmp/ccINwvx6.o /tmp/ccq59N2w.s
GNU assembler version 2.10.91 (i386-redhat-linux) using BFD version 2.10.91.0.2
 /opt/gcc/linux/ix86/gcc_3.0.3/lib/gcc-lib/i686-pc-linux-gnu/3.0.3/collect2 -m elf_i386 -dynamic-linker /lib/ld-linux.so.2 /usr/lib/crt1.o /usr/lib/crti.o /opt/gcc/linux/ix86/gcc_3.0.3/lib/gcc-lib/i686-pc-linux-gnu/3.0.3/crtbegin.o -L/opt/gcc/linux/ix86/gcc_3.0.3/lib/gcc-lib/i686-pc-linux-gnu/3.0.3 -L/opt/gcc/linux/ix86/gcc_3.0.3/lib/gcc-lib/i686-pc-linux-gnu/3.0.3/../../.. /tmp/ccINwvx6.o -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /opt/gcc/linux/ix86/gcc_3.0.3/lib/gcc-lib/i686-pc-linux-gnu/3.0.3/crtend.o /usr/lib/crtn.o
$ a.out
Starting
in proc_1
Abort (core dumped)
$ 
>Fix:
Work-around: omit -fomit-frame-pointer, but then the generated
code is not as fast.
>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: application/octet-stream; name="except-bug.cpp"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="except-bug.cpp"
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