Update to my original post:
The same problem does NOT occur on my second PC, where I also have Windows XP +
Cygwin and EXACTLY the same versions of gcc (3.4.4) and gdb
(6.5.50.20060706-cvs). On my second PC, I get a correct behavior:
gdb a.exe
(gdb) list
1 int main(int argc, char** argv)
2 {
3 return 0;
4 }
(gdb) break 3
Breakpoint 1 at 0x40107a: file main.c, line 3.
(gdb) run
Starting program: /c/TEMP/a.exe
Loaded symbols for /c/WINNT/system32/ntdll.dll
Loaded symbols for /c/WINNT/system32/kernel32.dll
Loaded symbols for /usr/bin/cygwin1.dll
Loaded symbols for /c/WINNT/system32/advapi32.dll
Loaded symbols for /c/WINNT/system32/rpcrt4.dll
Loaded symbols for /c/WINNT/system32/secur32.dll
Breakpoint 1, main (argc=1, argv=0x6637d0) at main.c:3
3 return 0;
-- dave
----------------------------------------
> From: [EMAIL PROTECTED]
> To: cygwin@cygwin.com
> Subject: gcc + gdb + breakpoint => SIGSEGV
> Date: Sun, 2 Mar 2008 03:27:52 -0500
>
>
> Hi,
>
> I have a problem when trying to use gdb with a program compiled with gcc in
> Cygwin.
>
> I compile this program:
>
>
> int main(int argc, char** argv)
> {
> return 0;
> }
>
>
> with this command:
>
> gcc -g main.c
>
> and I get this file:
>
> 9757 Mar 1 21:27 a.exe
>
> I then start gdb:
>
> gdb a.exe
>
> and running the program in gdb works:
>
> (gdb) run
> Starting program: /c/TEMP/a.exe
> Loaded symbols for /c/WINNT/system32/ntdll.dll
> Loaded symbols for /c/WINNT/system32/kernel32.dll
> Loaded symbols for /usr/bin/cygwin1.dll
> Loaded symbols for /c/WINNT/system32/advapi32.dll
> Loaded symbols for /c/WINNT/system32/rpcrt4.dll
> Loaded symbols for /c/WINNT/system32/secur32.dll
>
> Program exited normally.
>
> but doing the same with a breakpoint yields SIGSEGV:
>
> gdb a.exe
> (gdb) list
> 1 int main(int argc, char** argv)
> 2 {
> 3 return 0;
> 4 }
> (gdb) break 3
> Breakpoint 1 at 0x40107a: file main.c, line 3.
> (gdb) run
> Starting program: /c/TEMP/a.exe
> Loaded symbols for /c/WINNT/system32/ntdll.dll
> Loaded symbols for /c/WINNT/system32/kernel32.dll
> Loaded symbols for /usr/bin/cygwin1.dll
> Loaded symbols for /c/WINNT/system32/advapi32.dll
> Loaded symbols for /c/WINNT/system32/rpcrt4.dll
> Loaded symbols for /c/WINNT/system32/secur32.dll
>
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to thread 44692.0xaea4]
> 0x005c004d in ?? ()
> (gdb)
>
> What could be wrong?
>
> I have completely uninstalled, then reinstalled Cygwin, without help.
>
> -- dave
>
> The versions I use
> ------------------
> `gcc -v' yields:
>
>
> Reading specs from /usr/lib/gcc/i686-pc-cygwin/3.4.4/specs
> Configured with: /usr/build/package/orig/test.respin/gcc-3.4.4-3/
> configure --verbose --prefix=/usr --exec-prefix=/usr --sysconfdir=/etc
> --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man --
> infodir=/usr/share/info --enable-languages=c,ada,c+
> +,d,f77,pascal,java,objc --enable-nls --without-included-gettext --
> enable-version-specific-runtime-libs --without-x --enable-libgcj --
> disable-java-awt --with-system-zlib --enable-interpreter --disable-
> libgcj-debug --enable-threads=posix --enable-java-gc=boehm --disable-
> win32-registry --enable-sjlj-exceptions --enable-hash-synchronization
> --enable-libstdcxx-debug
> Thread model: posix
> gcc version 3.4.4 (cygming special, gdc 0.12, using dmd 0.125)
>
>
> When starting gdb, I get:
>
>
> GNU gdb 6.5.50.20060706-cvs (cygwin-special)
> Copyright (C) 2006 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".
>
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