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> --- Begin Message ---
>
>
>
> Subject: 
>
> gcc + gdb + breakpoint => SIGSEGV (Cygwin)
>
>
>
>
> Date: 
>
> Sat, 23 Jun 2007 23:09:41 -0700
>
>
>
>
> User-agent: 
>
> G2/1.0
>
>
>
>
> Hi,
>
> I have a problem when trying to use gdb with a program compiled with
> gcc in Cygwin.
>
> I compile this program:
>
> <main.c>
> int main(int argc, char** argv)
> {
>     return 0;
> }
> </main.c>
>
> with this command:
>
>   gcc -g main.c
>
> and I get this file:
>
>   9757 Jun 24 09:00 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
>
>   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
>
>   Program received signal SIGSEGV, Segmentation fault.
>   [Switching to thread 5856.0x171c]
>   0x005c004d in ?? ()
>   (gdb)
>
> What could be wrong?
>
> -- dave
>
> The versions I use
> ------------------
> `gcc -v' yields:
>
> <gcc -v>
> 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 --ver
> bose --prefix=/usr --exec-prefix=/usr --sysconfdir=/etc --libdir=/usr/
> lib --libe
> xecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info --
> enable-langu
> ages=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-thre
> ads=posix --enable-java-gc=boehm --disable-win32-registry --enable-
> sjlj-exceptio
> ns --enable-hash-synchronization --enable-libstdcxx-debug
> Thread model: posix
> gcc version 3.4.4 (cygming special, gdc 0.12, using dmd 0.125)
> </gcc -v>
>
> When starting gdb, I get:
>
> <gdb>
> 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".
> </gdb>
>
>
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