break $function in coff/pe doesn't break exactly before the first statement?

[Pedro Alves <pedro_alves at portugalmail dot pt>]

Hi all,

I am trying to run the testsuite against my arm-wince gdbserver port 
(what a pain!),
but I am getting a lot of failures all coming from the same symptom.
I then switched to native cygwin to see if the same happens there.

$ cat main.c
#include <stdio.h>

int main()
{
 printf ("hello world!\n");
 return 0;
}

$./gdb.exe main.exe
GNU gdb 6.5.50.20061115-cvs
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) b main
Breakpoint 1 at 0x401075: file main.c, line 4.
(gdb) r
Starting program: 
/cygdrive/d/cegccsf/cegcc/cegcc/src/build-gdb_server_cygwin/gdb/mytest/main.exe 

Loaded symbols for /cygdrive/c/WINDOWS/system32/ntdll.dll
Loaded symbols for /cygdrive/c/WINDOWS/system32/kernel32.dll
Loaded symbols for /usr/bin/cygwin1.dll
Loaded symbols for /cygdrive/c/WINDOWS/system32/advapi32.dll
Loaded symbols for /cygdrive/c/WINDOWS/system32/rpcrt4.dll

Breakpoint 1, main () at main.c:4
4       {
(gdb)

While on i686-linux, the breakpoint stops at:
5  printf ("hello world!\n");

So on coff targets, an extra 'next' is required to get to the first 
statement of the function.

I get the same sympton with either stabs:
cygwin$gcc main.c -g3 -O0 -o main.exe

or dwarf:
cygwin$gcc main.c -g3 -gdwarf-2 -O0 -o main.exe

Is this intended behavior?
If yes, should the testsuite be fixed?
Else, any hints where I should be looking at to fix this?

       === gdb Summary ===

# of expected passes        9537
# of unexpected failures    513
# of expected failures        46
# of unknown successes        3
# of known failures        24
# of unresolved testcases    38
# of untested testcases        12
# of unsupported tests        26
/cygdrive/d/cegccsf/cegcc/cegcc/src/build-gdb_server_cygwin/gdb/testsuite/../../gdb/gdb 
version  6.5.50.20061115-cvs -nx

Outch! > 500. Talk about regressions :)

Cheers,
Pedro Alves