Re: So what is wrong with v3 C++

[Daniel Berlin <dan at cgsoftware dot com>]

Michael Elizabeth Chastain <chastain@cygnus.com> writes:

Blingo.
gnuv3_rtti_type isn't quite right in some way.


> Yeah, here's a typescript of the whole megillah.
> 
> MichaelC
> 
> ===
> 
> Script started on Thu Jun 28 22:44:46 2001
> [chastain@snapon tmp]$ echo $PATH
> /horton/chastain/fsf/2001-06-23/snapon/native/install/bin:/bin:/usr/bin
> [chastain@snapon tmp]$ cat x1.cc
> class A
> {
>   public:
>     A();
>     virtual ~A();
>     static int i;
>};
> 
> A::A()
> {
>   ;
>}
> 
> A::~A()
> {
>   ;
>}
> 
> int A::i = 1;
> 
> class B : public A
> {
>   public:
>     B();
>     virtual ~B();
>     static int j;
>     static int k;
>};
> 
> B::B()
> {
>   ;
>}
> 
> B::~B()
> {
>   ;
>}
> 
> int B::j = 2;
> int B::k = 3;
> 
> int main ()
> {
>   B * pB = new B;
>   delete pB;
>}
> [chastain@snapon tmp]$ g++ -v
> Reading specs from /horton/chastain/fsf/2001-06-23/snapon/native/install/lib/gcc-lib/i686-pc-linux-gnu/3.0.1/specs
> Configured with: /horton/chastain/fsf/2001-06-23/source/configure --prefix=/horton/chastain/fsf/2001-06-23/snapon/native/install --disable-shared --enable-languages=c,c++,f77 --with-gnu-as --with-as=/horton/chastain/localdisk/snapon/baseline/binutils-2.11.2/native/install/bin/as --with-gnu-ld --with-ld=/horton/chastain/localdisk/snapon/baseline/binutils-2.11.2/native/install/bin/ld --enable-gdbmi
> Thread model: single
> gcc version 3.0.1 20010623 (prerelease)
> [chastain@snapon tmp]$ g++ -g -o x1.exe x1.cc
> [chastain@snapon tmp]$ gdb -v
> GNU gdb 2001-06-24-cvs (MI_OUT)
> Copyright 2001 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-linux-gnu".
> [chastain@snapon tmp]$ gdb gdb
> GNU gdb 2001-06-24-cvs (MI_OUT)
> Copyright 2001 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-linux-gnu"...
> (gdb) set prompt [top] 
> [top] set args x1.exe
> [top] break error
> Breakpoint 1 at 0x80d4556: file /horton/chastain/fsf/2001-06-23/source/gdb/utils.c, line 653.
> [top] run
> Starting program: /horton/chastain/fsf/2001-06-23/snapon/native/install/bin/gdb x1.exe
> GNU gdb 2001-06-24-cvs (MI_OUT)
> Copyright 2001 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-linux-gnu"...
> (gdb) break main
> Breakpoint 1 at 0x80488b6: file x1.cc, line 45.
> (gdb) run
> Starting program: /home/chastain/tmp/x1.exe 
> 
> Breakpoint 1, main () at x1.cc:45
> 45	  B * pB = new B;
> (gdb) next
> 46	  delete pB;
> (gdb) ptype pB
> type = class B : public A {
>   public:
>     static int j;
>     static int k;
> 
>     B & operator=(B const&);
>     B(B const&);
>     B(B const&);
>     B();
>     B();
>     ~B();
>     virtual ~B();
>     virtual ~B();
>} *
> (gdb) print pB
> $1 = (B *) 0x8050538
> (gdb) print *pB
> 
> Breakpoint 1, error (string=0x819d620 "Value can't be converted to integer.")
>     at /horton/chastain/fsf/2001-06-23/source/gdb/utils.c:653
> 653	  va_start (args, string);
> [top] bt
> #0  error (string=0x819d620 "Value can't be converted to integer.")
>     at /horton/chastain/fsf/2001-06-23/source/gdb/utils.c:653
> #1  0x0807445d in unpack_long ()
>     at /horton/chastain/fsf/2001-06-23/source/gdb/values.c:661
> #2  0x0807428e in value_as_pointer (val=0x84e9968)
>     at /horton/chastain/fsf/2001-06-23/source/gdb/values.c:602
> #3  0x0812dd90 in gnuv3_rtti_type (value=0x84f3e38, full_p=0xbffff0d8, 
>     top_p=0xbffff0dc, using_enc_p=0xbffff0e0)
>     at /horton/chastain/fsf/2001-06-23/source/gdb/gnu-v3-abi.c:211
> #4  0x080d7a71 in value_rtti_type (v=0x84f3e38, full=0xbffff0d8, 
>     top=0xbffff0dc, using_enc=0xbffff0e0)
>     at /horton/chastain/fsf/2001-06-23/source/gdb/cp-abi.c:76
> #5  0x0807d649 in value_full_object (argp=0x84f3e38, rtype=0x0, xfull=0, 
>     xtop=0, xusing_enc=0)
>     at /horton/chastain/fsf/2001-06-23/source/gdb/valops.c:3158
> #6  0x0807a9cd in value_ind (arg1=0x84960f8)
>     at /horton/chastain/fsf/2001-06-23/source/gdb/valops.c:1016
> #7  0x08078655 in evaluate_subexp_standard (expect_type=0x0, exp=0x84e9910, 
>     pos=0xbffff3c4, noside=EVAL_NORMAL)
>     at /horton/chastain/fsf/2001-06-23/source/gdb/eval.c:1620
> #8  0x0807532b in evaluate_subexp (expect_type=0x0, exp=0x84e9910, 
>     pos=0xbffff3c4, noside=EVAL_NORMAL)
>     at /horton/chastain/fsf/2001-06-23/source/gdb/eval.c:69
> ---Type <return> to continue, or q <return> to quit---
> #9  0x080754ee in evaluate_expression (exp=0x84e9910)
>     at /horton/chastain/fsf/2001-06-23/source/gdb/eval.c:158
> #10 0x08083132 in print_command_1 (exp=0x8220416 "*pB", inspect=0, voidprint=1)
>     at /horton/chastain/fsf/2001-06-23/source/gdb/printcmd.c:918
> #11 0x08083323 in print_command (exp=0x8220416 "*pB", from_tty=1)
>     at /horton/chastain/fsf/2001-06-23/source/gdb/printcmd.c:981
> #12 0x080d22d3 in execute_command (p=0x8220418 "B", from_tty=1)
>     at /horton/chastain/fsf/2001-06-23/source/gdb/top.c:789
> #13 0x0809d97d in command_handler (command=0x8220410 "print *pB")
>     at /horton/chastain/fsf/2001-06-23/source/gdb/event-top.c:513
> #14 0x0809de43 in command_line_handler (rl=0x84a8c88 "(\013#\bðA\r\büóÿ¿\021")
>     at /horton/chastain/fsf/2001-06-23/source/gdb/event-top.c:809
> #15 0x08188a26 in rl_callback_read_char ()
>     at /horton/chastain/fsf/2001-06-23/source/readline/callback.c:114
> #16 0x0809d86f in stdin_event_handler (error=0, client_data=0x0)
>     at /horton/chastain/fsf/2001-06-23/source/gdb/event-top.c:420
> #17 0x080eb8b7 in handle_file_event (event_file_desc=0)
>     at /horton/chastain/fsf/2001-06-23/source/gdb/event-loop.c:706
> #18 0x080eb34e in process_event ()
>     at /horton/chastain/fsf/2001-06-23/source/gdb/event-loop.c:335
> #19 0x080eb39b in gdb_do_one_event (data=0x0)
>     at /horton/chastain/fsf/2001-06-23/source/gdb/event-loop.c:372
> #20 0x080d1e8a in catch_errors (func=0x80eb370 <gdb_do_one_event>, args=0x0, 
> ---Type <return> to continue, or q <return> to quit---
>     errstring=0x81c6800 "", mask=6)
>     at /horton/chastain/fsf/2001-06-23/source/gdb/top.c:472
> #21 0x080eb3d3 in start_event_loop ()
>     at /horton/chastain/fsf/2001-06-23/source/gdb/event-loop.c:396
> #22 0x08070861 in captured_command_loop (data=0x0)
>     at /horton/chastain/fsf/2001-06-23/source/gdb/main.c:102
> #23 0x080d1e8a in catch_errors (func=0x8070850 <captured_command_loop>, 
>     args=0x0, errstring=0x819ba82 "", mask=6)
>     at /horton/chastain/fsf/2001-06-23/source/gdb/top.c:472
> #24 0x08071073 in captured_main (data=0xbffff970)
>     at /horton/chastain/fsf/2001-06-23/source/gdb/main.c:724
> #25 0x080d1e8a in catch_errors (func=0x80708a0 <captured_main>, 
>     args=0xbffff970, errstring=0x819ba82 "", mask=6)
>     at /horton/chastain/fsf/2001-06-23/source/gdb/top.c:472
> #26 0x080712d7 in main (argc=2, argv=0xbffff9e4)
>     at /horton/chastain/fsf/2001-06-23/source/gdb/main.c:735
> #27 0x400a0b65 in __libc_start_main (main=0x80712b0 <main>, argc=2, 
>     ubp_av=0xbffff9e4, init=0x806fc68 <_init>, fini=0x819b950 <_fini>, 
>     rtld_fini=0x4000df24 <_dl_fini>, stack_end=0xbffff9dc)
>     at ../sysdeps/generic/libc-start.c:111
> [top] cont
> Continuing.
> Value can't be converted to integer.
> (gdb) cont
> Continuing.
> 
> Program exited normally.
> (gdb) quit
> 
> Program exited normally.
> [top] quit
> [chastain@snapon tmp]$ exit
> exit
> 
> Script done on Thu Jun 28 22:46:27 2001

-- 
"Factorials were someone's attempt to make math *look* exciting.
"-Steven Wright