Re: [Tinycc-devel] win32 build is broken, may caused by jiang's changes

[Roy Tam]

Hello,

2014-05-15 8:58 GMT+08:00 Roy Tam <address@hidden>:
> Hello list,
>
> win32 tcc build is broken now:
>
> GNU gdb (GDB) 7.5
> Copyright (C) 2012 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> and "show warranty" for details.
> This GDB was configured as "i686-pc-mingw32".
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/gdb/bugs/>...
> Reading symbols from D:\tinycc\tcc.exe...done.
> (gdb) r
> Starting program: D:\tinycc\tcc.exe -B../win32 -I../include -c
> bcheck.c -o i386-win32/bcheck.o -I.. -g -DTCC_TARGET_I386
> -DTCC_TARGET_PE
> [New Thread 808.0x1780]
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x7c92100b in ntdll!RtlEnumerateGenericTableLikeADirectory ()
>    from C:\WINDOWS\system32\ntdll.dll
> (gdb) bt
> #0  0x7c92100b in ntdll!RtlEnumerateGenericTableLikeADirectory ()
>    from C:\WINDOWS\system32\ntdll.dll
> #1  0x77c0b90d in msvcrt!_lock () from C:\WINDOWS\system32\msvcrt.dll
> #2  0x77c10efa in msvcrt!fputs () from C:\WINDOWS\system32\msvcrt.dll
> #3  0x00000000 in ?? ()
> (gdb) frame 2
> #2  0x77c10efa in msvcrt!fputs () from C:\WINDOWS\system32\msvcrt.dll
> (gdb) info frame
> Stack level 2, frame at 0x12f2ac:
>  eip = 0x77c10efa in msvcrt!fputs; saved eip 0x0
>  called by frame at 0x12f2b0, caller of frame at 0x12f2a8
>  Arglist at 0x12f2a4, args:
>  Locals at 0x12f2a4, Previous frame's sp is 0x12f2ac
>  Saved registers:
>   eip at 0x12f2a8
> (gdb)

After some debugging, s1->ppfp is used without checking in tccpp.c:1760
http://repo.or.cz/w/tinycc.git/blob/07614b5e22073cbb2c1b298ab906d57372619604:/tccpp.c#l1760