Below is minimalistic textbook "how to generate a DLL" code, brought to
flavour by a grain of C++ salt. However it abort if compiled and run
with the latest gcc 3.4.4.1 and binutils 20050610-1 releases (as opposed
to the alternative 3.3.3.3, and I suspect any other version this century).
When run from a bash script, the compiled executable aborts with:
2400 Aborted (core dumped)
When run from within a bash shell, that's a mere:
Aborted (core dumped)
When run from a DOS prompt, it aborts silently.
It coredumps consistently on 3 out of 4 PCs tested (two of which have
identical hardware, and one which has entirely different components),
running either Windows XP, Windows 2000 SP4 or an almost immaculate
Windows 2000 SP3 (for which cygcheck output is listed). However, it did
not abort on a machine when that had the same gcc-3.4.4.1 installed, but
a slightly older binutils. The code compiled at that moment on that
machine does abort on the others. If you wonder what version of binutils
that might have been, so do I... It's no the 20050608-2 alternative
offered by the package selector.
The abort seems to happen be the destructor of the temporary string
returned by the test() function.
In some real programs, the effect is instead that the program halts,
without consuming CPU time, with no signal intercepted by gdb (but my
gdb knowledge is extremely average), and no input is consumed from the
terminal window.
As to the code, it's got nothing to do with the "puts" statements.
It doesn't matter if you explicitly export and import functions (using
__attribute) or leave it up to the compiler (as in the example).
It doesn't matter if you let an import library be the middle man in the
build process.
That should be enough for a first shot at this list. Cheers.
Source file 1: ==> testdll.cpp <==
#include <string>
std::string test() { return std::string(); }
Source file 2: ==> main.cpp <==
#include <string>
std::string test();
int main() {
puts("hello");
test();
puts("goodbye");
return 0;
}
Commands applied:
g++ -Wall testdll.cpp -shared -o test.dll
g++ -Wall main.cpp test.dll
./a.exe
Cygwin Configuration Diagnostics
Current System Time: Tue Aug 02 16:06:13 2005
Windows 2000 Professional Ver 5.0 Build 2195 Service Pack 3
Path: F:\cygwin\usr\local\bin
F:\cygwin\bin
F:\cygwin\bin
F:\cygwin\usr\X11R6\bin
f:\WINNT\system32
f:\WINNT
f:\WINNT\System32\Wbem
Output from F:\cygwin\bin\id.exe (nontsec)
UID: 500(Administrator) GID: 513(None)
0(root) 513(None) 544(Administrators)
545(Users)
Output from F:\cygwin\bin\id.exe (ntsec)
UID: 500(Administrator) GID: 513(None)
0(root) 513(None) 544(Administrators)
545(Users)
SysDir: F:\WINNT\System32
WinDir: F:\WINNT
USER = `Administrator'
PWD = `/home/Administrator'
HOME = `/home/Administrator'
MAKE_MODE = `unix'
HOMEPATH = `\'
MANPATH = `/usr/local/man:/usr/share/man:/usr/man:'
APPDATA = `F:\Documents and Settings\Administrator\Application Data'
HOSTNAME = `zed'
TERM = `cygwin'
PROCESSOR_IDENTIFIER = `x86 Family 15 Model 2 Stepping 7, GenuineIntel'
WINDIR = `F:\WINNT'
OLDPWD = `/usr/bin'
USERDOMAIN = `ZED'
OS = `Windows_NT'
ALLUSERSPROFILE = `F:\Documents and Settings\All Users'
OS2LIBPATH = `F:\WINNT\system32\os2\dll;'
TEMP = `/cygdrive/f/DOCUME~1/ADMINI~1/LOCALS~1/Temp'
COMMONPROGRAMFILES = `F:\Program Files\Common Files'
!F: = `F:\cygwin\bin'
USERNAME = `Administrator'
PROCESSOR_LEVEL = `15'
SYSTEMDRIVE = `F:'
USERPROFILE = `F:\Documents and Settings\Administrator'
PS1 = `\[\e]0;[EMAIL PROTECTED] \[\e[33m\]\w\[\e[0m\]\n\$ '
LOGONSERVER = `\\ZED'
PROCESSOR_ARCHITECTURE = `x86'
SHLVL = `1'
PATHEXT = `.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH'
HOMEDRIVE = `F:'
PROMPT = `$P$G'
COMSPEC = `F:\WINNT\system32\cmd.exe'
TMP = `/cygdrive/f/DOCUME~1/ADMINI~1/LOCALS~1/Temp'
SYSTEMROOT = `F:\WINNT'
CVS_RSH = `/bin/ssh'
PROCESSOR_REVISION = `0207'
INFOPATH = `/usr/local/info:/usr/share/info:/usr/info:'
PROGRAMFILES = `F:\Program Files'
NUMBER_OF_PROCESSORS = `1'
COMPUTERNAME = `ZED'
_ = `/usr/bin/cygcheck'
POSIXLY_CORRECT = `1'
HKEY_CURRENT_USER\Software\Cygnus Solutions
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\Program Options
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2
(default) = `/cygdrive'
cygdrive flags = 0x00000022
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2\/
(default) = `F:\cygwin'
flags = 0x0000000a
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2\/usr/bin
(default) = `F:\cygwin/bin'
flags = 0x0000000a
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2\/usr/lib
(default) = `F:\cygwin/lib'
flags = 0x0000000a
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\Program Options
a: fd FAT 0Mb 95% CP UN
d: hd FAT32 16323Mb 67% CP UN BACKUP
e: cd N/A N/A
f: hd NTFS 4094Mb 31% CP CS UN PA FC clean
z: hd NTFS 784Mb 99% CP CS UN PA FC System
F:\cygwin / system binmode
F:\cygwin/bin /usr/bin system binmode
F:\cygwin/lib /usr/lib system binmode
. /cygdrive system binmode,cygdrive
Found: F:\cygwin\bin\awk.exe
Found: F:\cygwin\bin\bash.exe
Found: F:\cygwin\bin\cat.exe
Found: F:\cygwin\bin\cp.exe
Found: F:\cygwin\bin\cpp.exe
Found: F:\cygwin\bin\find.exe
Found: F:\cygwin\bin\gcc.exe
Not Found: gdb
Found: F:\cygwin\bin\grep.exe
Found: F:\cygwin\bin\ld.exe
Found: F:\cygwin\bin\ls.exe
Not Found: make
Found: F:\cygwin\bin\mv.exe
Found: F:\cygwin\bin\rm.exe
Found: F:\cygwin\bin\sed.exe
Found: F:\cygwin\bin\sh.exe
Found: F:\cygwin\bin\tar.exe
56k 2005/07/09 F:\cygwin\bin\cygbz2-1.dll - os=4.0 img=1.0 sys=4.0
"cygbz2-1.dll" v0.0 ts=2005/7/9 7:09
18k 2004/07/06 F:\cygwin\bin\cygcharset-1.dll - os=4.0 img=1.0 sys=4.0
"cygcharset-1.dll" v0.0 ts=2004/7/6 20:09
40k 2005/07/10 F:\cygwin\bin\cygform-8.dll - os=4.0 img=1.0 sys=4.0
"cygform-8.dll" v0.0 ts=2005/7/10 5:29
45k 2001/04/25 F:\cygwin\bin\cygform5.dll - os=4.0 img=1.0 sys=4.0
"cygform5.dll" v0.0 ts=2001/4/25 7:28
35k 2002/01/09 F:\cygwin\bin\cygform6.dll - os=4.0 img=1.0 sys=4.0
"cygform6.dll" v0.0 ts=2002/1/9 7:03
48k 2003/08/09 F:\cygwin\bin\cygform7.dll - os=4.0 img=1.0 sys=4.0
"cygform7.dll" v0.0 ts=2003/8/9 11:25
28k 2003/07/20 F:\cygwin\bin\cyggdbm-3.dll - os=4.0 img=1.0 sys=4.0
"cyggdbm-3.dll" v0.0 ts=2003/7/20 9:58
30k 2003/08/11 F:\cygwin\bin\cyggdbm-4.dll - os=4.0 img=1.0 sys=4.0
"cyggdbm-4.dll" v0.0 ts=2003/8/11 4:12
19k 2003/03/22 F:\cygwin\bin\cyggdbm.dll - os=4.0 img=1.0 sys=4.0
"cyggdbm.dll" v0.0 ts=2002/2/20 4:05
15k 2003/07/20 F:\cygwin\bin\cyggdbm_compat-3.dll - os=4.0 img=1.0
sys=4.0
"cyggdbm_compat-3.dll" v0.0 ts=2003/7/20 10:00
15k 2003/08/11 F:\cygwin\bin\cyggdbm_compat-4.dll - os=4.0 img=1.0
sys=4.0
"cyggdbm_compat-4.dll" v0.0 ts=2003/8/11 4:13
17k 2001/06/28 F:\cygwin\bin\cyghistory4.dll - os=4.0 img=1.0 sys=4.0
"cyghistory4.dll" v0.0 ts=2001/1/7 5:34
29k 2003/08/10 F:\cygwin\bin\cyghistory5.dll - os=4.0 img=1.0 sys=4.0
"cyghistory5.dll" v0.0 ts=2003/8/11 1:16
24k 2005/07/29 F:\cygwin\bin\cyghistory6.dll - os=4.0 img=1.0 sys=4.0
"cyghistory6.dll" v0.0 ts=2005/7/29 5:57
991k 2004/07/06 F:\cygwin\bin\cygiconv-2.dll - os=4.0 img=1.0 sys=4.0
"cygiconv-2.dll" v0.0 ts=2004/7/6 20:10
22k 2001/12/13 F:\cygwin\bin\cygintl-1.dll - os=4.0 img=1.0 sys=4.0
"cygintl-1.dll" v0.0 ts=2001/12/13 10:28
37k 2003/08/10 F:\cygwin\bin\cygintl-2.dll - os=4.0 img=1.0 sys=4.0
"cygintl-2.dll" v0.0 ts=2003/8/10 23:50
54k 2004/07/06 F:\cygwin\bin\cygintl-3.dll - os=4.0 img=1.0 sys=4.0
"cygintl-3.dll" v0.0 ts=2004/7/6 19:51
21k 2001/06/20 F:\cygwin\bin\cygintl.dll - os=4.0 img=1.0 sys=4.0
"cygintl.dll" v0.0 ts=2001/6/20 19:09
21k 2005/07/10 F:\cygwin\bin\cygmenu-8.dll - os=4.0 img=1.0 sys=4.0
"cygmenu-8.dll" v0.0 ts=2005/7/10 5:28
26k 2001/04/25 F:\cygwin\bin\cygmenu5.dll - os=4.0 img=1.0 sys=4.0
"cygmenu5.dll" v0.0 ts=2001/4/25 7:27
20k 2002/01/09 F:\cygwin\bin\cygmenu6.dll - os=4.0 img=1.0 sys=4.0
"cygmenu6.dll" v0.0 ts=2002/1/9 7:03
29k 2003/08/09 F:\cygwin\bin\cygmenu7.dll - os=4.0 img=1.0 sys=4.0
"cygmenu7.dll" v0.0 ts=2003/8/9 11:25
67k 2005/07/10 F:\cygwin\bin\cygncurses++-8.dll - os=4.0 img=1.0 sys=4.0
"cygncurses++-8.dll" v0.0 ts=2005/7/10 5:29
156k 2001/04/25 F:\cygwin\bin\cygncurses++5.dll - os=4.0 img=1.0 sys=4.0
"cygncurses++5.dll" v0.0 ts=2001/4/25 7:29
175k 2002/01/09 F:\cygwin\bin\cygncurses++6.dll - os=4.0 img=1.0 sys=4.0
"cygncurses++6.dll" v0.0 ts=2002/1/9 7:03
225k 2005/07/10 F:\cygwin\bin\cygncurses-8.dll - os=4.0 img=1.0 sys=4.0
"cygncurses-8.dll" v0.0 ts=2005/7/10 5:15
226k 2001/04/25 F:\cygwin\bin\cygncurses5.dll - os=4.0 img=1.0 sys=4.0
"cygncurses5.dll" v0.0 ts=2001/4/25 7:17
202k 2002/01/09 F:\cygwin\bin\cygncurses6.dll - os=4.0 img=1.0 sys=4.0
"cygncurses6.dll" v0.0 ts=2002/1/9 7:03
224k 2003/08/09 F:\cygwin\bin\cygncurses7.dll - os=4.0 img=1.0 sys=4.0
"cygncurses7.dll" v0.0 ts=2003/8/9 11:24
11k 2005/07/10 F:\cygwin\bin\cygpanel-8.dll - os=4.0 img=1.0 sys=4.0
"cygpanel-8.dll" v0.0 ts=2005/7/10 5:28
15k 2001/04/25 F:\cygwin\bin\cygpanel5.dll - os=4.0 img=1.0 sys=4.0
"cygpanel5.dll" v0.0 ts=2001/4/25 7:27
12k 2002/01/09 F:\cygwin\bin\cygpanel6.dll - os=4.0 img=1.0 sys=4.0
"cygpanel6.dll" v0.0 ts=2002/1/9 7:03
19k 2003/08/09 F:\cygwin\bin\cygpanel7.dll - os=4.0 img=1.0 sys=4.0
"cygpanel7.dll" v0.0 ts=2003/8/9 11:24
62k 2003/12/11 F:\cygwin\bin\cygpcre-0.dll - os=4.0 img=1.0 sys=4.0
"cygpcre-0.dll" v0.0 ts=2003/12/11 18:01
63k 2003/04/11 F:\cygwin\bin\cygpcre.dll - os=4.0 img=1.0 sys=4.0
"cygpcre.dll" v0.0 ts=2003/4/11 10:31
9k 2003/12/11 F:\cygwin\bin\cygpcreposix-0.dll - os=4.0 img=1.0 sys=4.0
"cygpcreposix-0.dll" v0.0 ts=2003/12/11 18:01
61k 2003/04/11 F:\cygwin\bin\cygpcreposix.dll - os=4.0 img=1.0 sys=4.0
"cygpcreposix.dll" v0.0 ts=2003/4/11 10:31
22k 2002/06/09 F:\cygwin\bin\cygpopt-0.dll - os=4.0 img=1.0 sys=4.0
"cygpopt-0.dll" v0.0 ts=2002/6/9 7:45
108k 2001/06/28 F:\cygwin\bin\cygreadline4.dll - os=4.0 img=1.0 sys=4.0
"cygreadline4.dll" v0.0 ts=2001/1/7 5:34
148k 2003/08/10 F:\cygwin\bin\cygreadline5.dll - os=4.0 img=1.0 sys=4.0
"cygreadline5.dll" v0.0 ts=2003/8/11 1:16
144k 2005/07/29 F:\cygwin\bin\cygreadline6.dll - os=4.0 img=1.0 sys=4.0
"cygreadline6.dll" v0.0 ts=2005/7/29 5:57
60k 2005/07/09 F:\cygwin\bin\cygz.dll - os=4.0 img=1.0 sys=4.0
"cygz.dll" v0.0 ts=2005/7/9 4:27
1265k 2005/07/03 F:\cygwin\bin\cygwin1.dll - os=4.0 img=1.0 sys=4.0
"cygwin1.dll" v0.0 ts=2005/7/3 2:30
Cygwin DLL version info:
DLL version: 1.5.18
DLL epoch: 19
DLL bad signal mask: 19005
DLL old termios: 5
DLL malloc env: 28
API major: 0
API minor: 132
Shared data: 4
DLL identifier: cygwin1
Mount registry: 2
Cygnus registry name: Cygnus Solutions
Cygwin registry name: Cygwin
Program options name: Program Options
Cygwin mount registry name: mounts v2
Cygdrive flags: cygdrive flags
Cygdrive prefix: cygdrive prefix
Cygdrive default prefix:
Build date: Sat Jul 2 20:30:04 EDT 2005
Shared id: cygwin1S4
Can't find the cygrunsrv utility, skipping services check.
Cygwin Package Information
Last downloaded files to: F:\Documents and Settings\Administrator\cygwin
Last downloaded files from: ftp://ftp.easynet.be/cygwin
Package Version
_update-info-dir 00286-1
alternatives 1.3.20a-1
ash 20040127-3
base-files 3.5-1
base-passwd 2.2-1
bash 3.0-11
binutils 20050610-1
bzip2 1.0.3-1
coreutils 5.3.0-9
cygutils 1.2.9-1
cygwin 1.5.18-1
cygwin-doc 1.4-2
diffutils 2.8.7-1
editrights 1.01-1
findutils 20041227-1
gawk 3.1.5-1
gcc 3.4.4-1
gcc-core 3.4.4-1
gcc-g++ 3.4.4-1
gcc-mingw-core 20050522-1
gcc-mingw-g++ 20050522-1
gdbm 1.8.3-7
grep 2.5.1a-2
groff 1.18.1-2
gzip 1.3.5-1
less 381-1
libbz2_1 1.0.3-1
libcharset1 1.9.2-1
libgdbm 1.8.0-5
libgdbm-devel 1.8.3-7
libgdbm3 1.8.3-3
libgdbm4 1.8.3-7
libiconv 1.9.2-1
libiconv2 1.9.2-1
libintl 0.10.38-3
libintl1 0.10.40-1
libintl2 0.12.1-3
libintl3 0.14.1-1
libncurses5 5.2-1
libncurses6 5.2-8
libncurses7 5.3-4
libncurses8 5.4-2
libpcre 4.1-1
libpcre0 4.5-1
libpopt0 1.6.4-4
libreadline4 4.1-2
libreadline5 4.3-5
libreadline6 5.0-4
login 1.9-7
man 1.5p-1
mingw-runtime 3.7-1
mktemp 1.5-3
ncurses 5.4-2
sed 4.1.4-1
tar 1.13.25-7
termcap 20050421-1
terminfo 5.4_20041009-1
texinfo 4.8-1
w32api 3.2-1
which 1.7-1
zlib 1.2.2-2
Use -h to see help about each section
--
Stein Somers
Principal Software Engineer, Optical Solutions
OPNET Technologies bvba http://www.opnet.com/
Franklin Rooseveltlaan 348 W, B-9000 Gent, Belgium
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