Dominique Pellé wrote:
> Cesar Romani wrote:
>
>> Bram Moolenaar wrote:
>>> Cesar Romani wrote:
>>>
>>>> I tried compiling vim 7.2 with termcap on MSYS, and it compiles fine.
>>>> However, when I execute it, I get:
>>>> --------------------
>>>> $ vim
>>>> Vim: Caught deadly signal SEGV
>>>> Vim: Finished.
>>>> --------------------
>>>>
>>>> If I run gdb on it, I get:
>>>> --------------------
>>>> $ gdb vim.exe
>>>> GNU gdb 6.8
>>>> Copyright (C) 2008 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"...
>>>> (gdb) run
>>>> Starting program: C:\msys\1.0\home\Romer\msys\vim72\src/vim.exe
>>>> [New thread 5908.0xfec]
>>>> Vim: Warning: Output is not to a terminal
>>>> Vim: Warning: Input is not from a terminal
>>>> [New thread 5908.0x580]
>>>>
>>>> Program received signal SIGSEGV, Segmentation fault.
>>>> 0x004fee32 in set_termname (
>>>> term=0x3a6c3532 <Address 0x3a6c3532 out of bounds>) at term.c:1866
>>>> 1866 if (STRCMP(term, "pcterm") == 0)
>>>> --------------------
>>>>
>>>> The compilation and execution of vim for win32 with MingW is fine and I
>>>> want to compile it on the MSYS environment because the vim version
there
>>>> is too old, 5.8
>>> Strange that it crashes there. Earlier in the set_termname() function
>>> there is this line:
>>>
>>> if (term_is_builtin(term))
>>>
>>> Try setting a breakpoint there.
>>>
>>> With weird errors I suspect the compiler. Did you disable the
>>> optimizer? There are quite a few versions of gcc with bugs in the
>>> optimizer code.
>> The gcc version I'm using is 2.95.3-1
>> and the optimizer isn't disabled:
>> CFLAGS = -g -O2
>>
>> If I put a break at line 1615:
>> if (term_is_builtin(term))
>> I get:
>> --------------------
>> (gdb) break term.c:1615
>> Breakpoint 1 at 0x4fcdee: file term.c, line 1615.
>> (gdb) run
>> The program being debugged has been started already.
>> Start it from the beginning? (y or n) [answered Y; input not from
>> terminal]
>> Starting program: C:\msys\1.0\home\Romer\msys\vim72\src/vim.exe
>> [New thread 3524.0x7b8]
>> Vim: Warning: Output is not to a terminal
>> Vim: Warning: Input is not from a terminal
>> [New thread 3524.0x59c]
>>
>> Breakpoint 1, set_termname (term=0xa0158b8 "msys") at term.c:1615
>> 1615 if (term_is_builtin(term))
>> --------------------
>>
>> Regards,
>> Cesar
>
>
> I don't understand how term can be correct at line term.c:1615 and
> then later incorrect at line 1866.
>
> It's worth disabling optimization by building Vim with -O0 instead of -O2.
> This can be done by adding a line in src/Makefile with -O0. For example:
>
> 528 # Often used for GCC: mixed optimizing, lot of optimizing, debugging
> 529 CFLAGS = -g -O0 -Wall
>
> Then re-compile with: "make clean; make"
>
> When putting a breakpoint at line term.c:1615,
> what is the value of 'term' variable? (output of gdb command: print term)
>
> Ex:
>
> (gdb) p term
> $1 = (char_u *) 0x946e25c "xterm-256color"
$1 = (char_u *) 0xa0158c0 "msys"
> What is also the value of 'term' later at line 1866 where it crashes?
$1 = (char_u *) 0x3a6c3532 <Address 0x3a6c3532 out of bounds>
> Output of gdb command "bt full" might also be helpful.
--------------------
(gdb) bt full
#0 0x004fd3a2 in set_termname (
term=0x3a6c3532 <Address 0x3a6c3532 out of bounds>) at term.c:1866
termp = (struct builtin_term *) 0x22f860
builtin_first = 1
try = 2
termcap_cleared = 1
width = 80
height = 25
error_msg = (char_u *) 0x0
bs_p = (char_u *) 0x22f860 ":\017R"
del_p = (char_u *) 0x3a6c3532 <Address 0x3a6c3532 out of bounds>
#1 0x3f5b455c in ?? ()
No symbol table info available.
#2 0x3a6c3532 in ?? ()
No symbol table info available.
...
#189 0x00000000 in ?? ()
No symbol table info available.
--------------------
If I re-compile with CFLAGS = -g -O0 -Wall, vim executes fine on the
console but not on rxvt:
--------------------
(gdb) run
Starting program: C:\msys\1.0\home\Romer\msys\vim72\src/vim.exe
[New thread 252.0xe14]
Vim: Warning: Output is not to a terminal
Vim: Warning: Input is not from a terminal
[New thread 252.0xe3c]
Program received signal SIGSEGV, Segmentation fault.
0x71084d3a in strcmp () from C:\msys\1.0\bin\msys-1.0.dll
--------------------
For the console TERM=cygwin and for rxvt TERM=msys
Regards,
Cesar
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