c/9185: gcc produces errornous code on cygwin host when -fomit-frame-pointer is used together with -O2 or -O3

[macklobell at hotmail dot com]

>Number:         9185
>Category:       c
>Synopsis:       gcc produces errornous code on cygwin host when -fomit-frame-pointer is used together with -O2 or -O3
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Jan 06 05:36:20 PST 2003
>Closed-Date:
>Last-Modified:
>Originator:     macklobell@hotmail.com
>Release:        All
>Organization:
>Environment:
$ uname -a
CYGWIN_NT-5.1 VOLVO 1.3.18(0.69/3/2) 2002-12-25 15:37 i686 unknown unknown Cygwin

$ echo $CC33
/home/lobell/build/native_gcc3.3/gcc/xgcc.exe -B /home/lobell/build/native_gcc3.3/gcc

$ $CC33 --version
xgcc (GCC) 3.3 20030103 (prerelease)
Copyright (C) 2002 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ as --version
GNU assembler 2.13.90 20021118
Copyright 2002 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License.  This program has absolutely no warranty.
This assembler was configured for a target of `i686-pc-cygwin'.

$ ld --version
GNU ld version 2.13.90 20021118
Copyright 2002 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License.  This program has absolutely no warranty.
>Description:
I came a cross this problem when building binutils. All logs/traces are from builds of the linker (ld.exe).

The problem, if i build the linker with "-fomit-frame-pointer" together with -O2 or -O3 the executable will crash (segmentation fault). ld.exe always crash in the function parse_args(lexsup.c), so all logs attached are from that file.

This might only be a cygwin problem. I did the same tests o n a FreeBSD machine and the executables work fine there.

*** Working testcase. -fomit-frame-pointer with -O1 ***

$ rm lexsup.[ios]; make CC="$CC33" CFLAGS="-g -O1 -fomit-frame-pointer -save-temps -dAP -Wa,-al
h=mixed.log" && ./ld-new.exe -V
make  all-recursive
make[1]: Entering directory `/home/lobell/build/native_binutils/ld'
Making all in po
make[2]: Entering directory `/home/lobell/build/native_binutils/ld/po'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/home/lobell/build/native_binutils/ld/po'
make[2]: Entering directory `/home/lobell/build/native_binutils/ld'
/home/lobell/build/native_gcc3.3/gcc/xgcc.exe -B /home/lobell/build/native_gcc3.3/gcc -DHAVE_CON
FIG_H -I. -I../../../src/binutils-2.13.1/ld -I. -D_GNU_SOURCE -I. -I../../../src/binutils-2.13.1
/ld -I../bfd -I../../../src/binutils-2.13.1/ld/../bfd -I../../../src/binutils-2.13.1/ld/../inclu
de -I../../../src/binutils-2.13.1/ld/../intl -I../intl  -g -O1 -fomit-frame-pointer -save-temps
-dAP -Wa,-alh=mixed.log -DLOCALEDIR="\"/usr/local/share/locale\""   -W -Wall -Wstrict-prototypes
 -Wmissing-prototypes -g -O1 -fomit-frame-pointer -save-temps -dAP -Wa,-alh=mixed.log -c ../../.
./src/binutils-2.13.1/ld/lexsup.c
/bin/sh ./libtool --mode=link /home/lobell/build/native_gcc3.3/gcc/xgcc.exe -B /home/lobell/buil
d/native_gcc3.3/gcc -W -Wall -Wstrict-prototypes -Wmissing-prototypes -g -O1 -fomit-frame-pointe
r -save-temps -dAP -Wa,-alh=mixed.log  -o ld-new.exe  ldgram.o ldlex.o lexsup.o ldlang.o mri.o l
dctor.o ldmain.o ldwrite.o ldexp.o ldemul.o ldver.o ldmisc.o ldfile.o ldcref.o ei386pe.o deffile
p.o pe-dll.o ../bfd/libbfd.la ../libiberty/libiberty.a
/home/lobell/build/native_gcc3.3/gcc/xgcc.exe -B /home/lobell/build/native_gcc3.3/gcc -W -Wall -
Wstrict-prototypes -Wmissing-prototypes -g -O1 -fomit-frame-pointer -save-temps -dAP -Wa,-alh=mi
xed.log -o ld-new.exe ldgram.o ldlex.o lexsup.o ldlang.o mri.o ldctor.o ldmain.o ldwrite.o ldexp
.o ldemul.o ldver.o ldmisc.o ldfile.o ldcref.o ei386pe.o deffilep.o pe-dll.o  ../bfd/.libs/libbf
d.a ../libiberty/libiberty.a
make[2]: Leaving directory `/home/lobell/build/native_binutils/ld'
make[1]: Leaving directory `/home/lobell/build/native_binutils/ld'
GNU ld version 2.13.1                   <- *** Working! ***
  Supported emulations:
   i386pe

*** Not working testcase. -fomit-frame-pointer with -O2 ***

$ rm lexsup.[ios]; make CC="$CC33" CFLAGS="-g -O2 -fomit-frame-pointer -save-temps -dAP -Wa,-al
h=mixed.log" && ./ld-new.exe -V
make  all-recursive
make[1]: Entering directory `/home/lobell/build/native_binutils/ld'
Making all in po
make[2]: Entering directory `/home/lobell/build/native_binutils/ld/po'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/home/lobell/build/native_binutils/ld/po'
make[2]: Entering directory `/home/lobell/build/native_binutils/ld'
/home/lobell/build/native_gcc3.3/gcc/xgcc.exe -B /home/lobell/build/native_gcc3.3/gcc -DHAVE_CON
FIG_H -I. -I../../../src/binutils-2.13.1/ld -I. -D_GNU_SOURCE -I. -I../../../src/binutils-2.13.1
/ld -I../bfd -I../../../src/binutils-2.13.1/ld/../bfd -I../../../src/binutils-2.13.1/ld/../inclu
de -I../../../src/binutils-2.13.1/ld/../intl -I../intl  -g -O2 -fomit-frame-pointer -save-temps
-dAP -Wa,-alh=mixed.log -DLOCALEDIR="\"/usr/local/share/locale\""   -W -Wall -Wstrict-prototypes
 -Wmissing-prototypes -g -O2 -fomit-frame-pointer -save-temps -dAP -Wa,-alh=mixed.log -c ../../.
./src/binutils-2.13.1/ld/lexsup.c
/bin/sh ./libtool --mode=link /home/lobell/build/native_gcc3.3/gcc/xgcc.exe -B /home/lobell/buil
d/native_gcc3.3/gcc -W -Wall -Wstrict-prototypes -Wmissing-prototypes -g -O2 -fomit-frame-pointe
r -save-temps -dAP -Wa,-alh=mixed.log  -o ld-new.exe  ldgram.o ldlex.o lexsup.o ldlang.o mri.o l
dctor.o ldmain.o ldwrite.o ldexp.o ldemul.o ldver.o ldmisc.o ldfile.o ldcref.o ei386pe.o deffile
p.o pe-dll.o ../bfd/libbfd.la ../libiberty/libiberty.a
/home/lobell/build/native_gcc3.3/gcc/xgcc.exe -B /home/lobell/build/native_gcc3.3/gcc -W -Wall -
Wstrict-prototypes -Wmissing-prototypes -g -O2 -fomit-frame-pointer -save-temps -dAP -Wa,-alh=mi
xed.log -o ld-new.exe ldgram.o ldlex.o lexsup.o ldlang.o mri.o ldctor.o ldmain.o ldwrite.o ldexp
.o ldemul.o ldver.o ldmisc.o ldfile.o ldcref.o ei386pe.o deffilep.o pe-dll.o  ../bfd/.libs/libbf
d.a ../libiberty/libiberty.a
make[2]: Leaving directory `/home/lobell/build/native_binutils/ld'
make[1]: Leaving directory `/home/lobell/build/native_binutils/ld'
Segmentation fault (core dumped)        <- *** NOTE! ***


*** Not working testcase. -fomit-frame-pointer and -O3 ***

$ rm lexsup.[ios]; make CC="$CC33" CFLAGS="-g -O3 -fomit-frame-pointer -save-temps -dAP -Wa,-al
h=mixed.log" && ./ld-new.exe -V
make  all-recursive
make[1]: Entering directory `/home/lobell/build/native_binutils/ld'
Making all in po
make[2]: Entering directory `/home/lobell/build/native_binutils/ld/po'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/home/lobell/build/native_binutils/ld/po'
make[2]: Entering directory `/home/lobell/build/native_binutils/ld'
/home/lobell/build/native_gcc3.3/gcc/xgcc.exe -B /home/lobell/build/native_gcc3.3/gcc -DHAVE_CON
FIG_H -I. -I../../../src/binutils-2.13.1/ld -I. -D_GNU_SOURCE -I. -I../../../src/binutils-2.13.1
/ld -I../bfd -I../../../src/binutils-2.13.1/ld/../bfd -I../../../src/binutils-2.13.1/ld/../inclu
de -I../../../src/binutils-2.13.1/ld/../intl -I../intl  -g -O3 -fomit-frame-pointer -save-temps
-dAP -Wa,-alh=mixed.log -DLOCALEDIR="\"/usr/local/share/locale\""   -W -Wall -Wstrict-prototypes
 -Wmissing-prototypes -g -O3 -fomit-frame-pointer -save-temps -dAP -Wa,-alh=mixed.log -c ../../.
./src/binutils-2.13.1/ld/lexsup.c
/bin/sh ./libtool --mode=link /home/lobell/build/native_gcc3.3/gcc/xgcc.exe -B /home/lobell/buil
d/native_gcc3.3/gcc -W -Wall -Wstrict-prototypes -Wmissing-prototypes -g -O3 -fomit-frame-pointe
r -save-temps -dAP -Wa,-alh=mixed.log  -o ld-new.exe  ldgram.o ldlex.o lexsup.o ldlang.o mri.o l
dctor.o ldmain.o ldwrite.o ldexp.o ldemul.o ldver.o ldmisc.o ldfile.o ldcref.o ei386pe.o deffile
p.o pe-dll.o ../bfd/libbfd.la ../libiberty/libiberty.a
/home/lobell/build/native_gcc3.3/gcc/xgcc.exe -B /home/lobell/build/native_gcc3.3/gcc -W -Wall -
Wstrict-prototypes -Wmissing-prototypes -g -O3 -fomit-frame-pointer -save-temps -dAP -Wa,-alh=mi
xed.log -o ld-new.exe ldgram.o ldlex.o lexsup.o ldlang.o mri.o ldctor.o ldmain.o ldwrite.o ldexp
.o ldemul.o ldver.o ldmisc.o ldfile.o ldcref.o ei386pe.o deffilep.o pe-dll.o  ../bfd/.libs/libbf
d.a ../libiberty/libiberty.a
make[2]: Leaving directory `/home/lobell/build/native_binutils/ld'
make[1]: Leaving directory `/home/lobell/build/native_binutils/ld'
Segmentation fault (core dumped)        <- *** NOTE! ***

*** gdb output ***

$ /usr/local/native/bin/gdb.exe ./ld-new.exe
GNU gdb 5.3
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i686-pc-cygwin"...
(gdb) r
Starting program: /home/lobell/build/native_binutils/ld/ld-new.exe

Program received signal SIGSEGV, Segmentation fault.
parse_args (argc=Cannot access memory at address 0x1051
) at ../../../src/binutils-2.13.1/ld/lexsup.c:492
492                                 longopts[il] = ld_options[i].opt;
(gdb) where
#0  parse_args (argc=Cannot access memory at address 0x1051
) at ../../../src/binutils-2.13.1/ld/lexsup.c:492
#1  0x77fa2aef in _libkernel32_a_iname ()
Cannot access memory at address 0x1
(gdb)


I have done these tests with 3.3, 3.4 and 3.2, and the problem exists in all versions.

I have attached the following files from a build with CFLAGS="-fomit-frame-pointer -O2":
lexsup.s    (-save-temps -dAP)
mixed.log   (-Wa,-alh=mixed.log)
lexsup.c
>How-To-Repeat:
Build binutils 2.13.1 on a cygwin host with CFLAGS="-fomit-frame-pointer -O2".
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: