[Tinycc-devel] Fwd: Segfault compiling bash?

[charlesrandall4-tinycc]

Still see this with the latest release. Anyone else
have the same problem?

-Charles

--- address@hidden wrote:

> Date: Sat, 30 Oct 2004 22:20:23 -0700 (PDT)
> From:  <address@hidden>
> Subject: Segfault compiling bash?
> To: address@hidden
> 
> I'm new to tcc and am trying to compile a number of
> different programs to see how well it would work in
> "real life".
> 
> Attempting to compile bash-3.0 using tcc 0.9.21 on
> RedHat Linux 9 and run into the following problem,
> 
> tcc  -DPROGRAM='"bash"' -DCONF_HOSTTYPE='"i686"'
> -DCONF_OSTYPE='"linux-gnu"'
> -DCONF_MACHTYPE='"i686-pc-linux-gnu"'
> -DCONF_VENDOR='"pc"'
> -DLOCALEDIR='"/tmp/cfr/share/locale"'
> -DPACKAGE='"bash"' -DSHELL -DHAVE_CONFIG_H  -I.  -I.
> -I./include -I./lib   -g -c variables.c
> variables.c:1981: constant expression expected
> make: *** [variables.o] Segmentation fault
> 
> If I try to run tcc_g in the debugger the backtrace
> is,
> 
> gdb ~/src/tcc-0.9.21/tcc_g
> GNU gdb Red Hat Linux (5.3post-0.20021129.18rh)
> Copyright 2003 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
> "i386-redhat-linux-gnu"...
> (gdb) run -DPROGRAM='"bash"'
> -DCONF_HOSTTYPE='"i686"'
> -DCONF_OSTYPE='"linux-gnu"'
> -DCONF_MACHTYPE='"i686-pc-linux-gnu"'
> -DCONF_VENDOR='"pc"'
> -DLOCALEDIR='"/tmp/cfr/share/locale"'
> -DPACKAGE='"bash"' -DSHELL -DHAVE_CONFIG_H  -I.  -I.
> -I./include -I./lib   -g -c variables.c
> Starting program:
> /home/crandall/src/tcc-0.9.21/tcc_g
> -DPROGRAM='"bash"' -DCONF_HOSTTYPE='"i686"'
> -DCONF_OSTYPE='"linux-gnu"'
> -DCONF_MACHTYPE='"i686-pc-linux-gnu"'
> -DCONF_VENDOR='"pc"'
> -DLOCALEDIR='"/tmp/cfr/share/locale"'
> -DPACKAGE='"bash"' -DSHELL -DHAVE_CONFIG_H  -I.  -I.
> -I./include -I./lib   -g -c variables.c
> variables.c:1981: constant expression expected
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x0804c667 in tok_str_free (str=0x2f0) at tcc.c:2230
> 2230            t = *p;
> (gdb) bt
> #0  0x0804c667 in tok_str_free (str=0x2f0) at
> tcc.c:2230
> #1  0x08056db9 in gen_inline_functions () at
> tcc.c:8759
> #2  0x0805748b in tcc_compile (s1=0x8072748) at
> tcc.c:9039
> #3  0x0805fe44 in tcc_add_file_internal
> (s1=0x8072748,
>     filename=0xbffffa7b "variables.c", flags=1) at
> tcc.c:9663
> #4  0x08060048 in tcc_add_file (s=0x8072748,
> filename=0xbffffa7b "variables.c")
>     at tcc.c:9740
> #5  0x08060d93 in main (argc=17, argv=0xbffff824) at
> tcc.c:10382
> #6  0x420156a4 in __libc_start_main () from
> /lib/tls/libc.so.6
> (gdb) l
> 2225        CString *cstr;
> 2226        int t;
> 2227
> 2228        p = str;
> 2229        for(;;) {
> 2230            t = *p;
> 2231            /* NOTE: we test zero separately so
> that GCC can generate a
> 2232               table for the following switch */
> 2233            if (t == 0)
> 2234                break;
> (gdb) p str
> $1 = (int *) 0x2f0
> (gdb) p *str
> Cannot access memory at address 0x2f0
> (gdb) up
> #1  0x08056db9 in gen_inline_functions () at
> tcc.c:8759
> 8759                tok_str_free(str);
> (gdb) p str
> $2 = (int *) 0x2f0
> (gdb) l
> 8754            type = &sym->type;
> 8755            if (((type->t & VT_BTYPE) ==
> VT_FUNC)
> &&
> 8756                (type->t & (VT_STATIC |
> VT_INLINE)) ==
> 8757                (VT_STATIC | VT_INLINE)) {
> 8758                str = (int *)sym->r;
> 8759                tok_str_free(str);
> 8760                sym->r = 0; /* fail safe */
> 8761            }
> 8762        }
> 8763    }
> (gdb) p sym
> $3 = (Sym *) 0x8174968
> (gdb) p *sym
> $4 = {v = 6300, r = 752, c = 0, type = {t = 1414,
> ref
> = 0x81748f0},
>   next = 0x0, prev = 0x81748f0, prev_tok = 0x0}
> 
> Has anyone looked at this?
> 
> -Charles
> 
> 
> 
> 


Charles F. Randall, IV
address@hidden (always forwarded)