[Cscope-devel] [ cscope-Bugs-1891735 ] seg. fault in linemode when resizing terminal

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Bugs item #1891735, was opened at 2008-02-12 15:29
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Jiyong Jung (bwhite8129)
Assigned to: Nobody/Anonymous (nobody)
Summary: seg. fault in linemode when resizing terminal

Initial Comment:
I always use cscope with vim.
cscope is executed with following command. (checked with 'ps')
      cscope -dl -f cscope.out

It always happens when I resize my terminal(putty). 

Backtrace ----
(gdb) where
#0  0x000000353022ca9f in ungetch (ch=410) at ../../ncurses/base/lib_ungetch.c:63
#1  <signal handler called>
#2  0x0000003c355b9a92 in __read_nocancel () from /lib64/tls/libc.so.6
#3  0x0000003c35565422 in _IO_file_read_internal () from /lib64/tls/libc.so.6
#4  0x0000003c355646fd in _IO_new_file_underflow () from /lib64/tls/libc.so.6
#5  0x0000003c3556652e in _IO_default_uflow_internal () from /lib64/tls/libc.so.6
#6  0x0000003c3555bd1d in _IO_getline_info_internal () from /lib64/tls/libc.so.6
#7  0x0000003c3555ab43 in fgets () from /lib64/tls/libc.so.6
#8  0x0000000000412d2c in main (argc=5681232, argv=0x51) at main.c:610


I think that WINCH signal handling is the problem. No seg. fault occured after I moved following code, which sets WINCH signal handling, into the "if (linemode == NO) {" block in main.c.

----
#if defined(KEY_RESIZE) && !defined(__DJGPP__)
    winch_action.sa_sigaction = sigwinch_handler;
    sigemptyset(&winch_action.sa_mask);
    winch_action.sa_flags = SA_SIGINFO;
    sigaction(SIGWINCH,&winch_action,NULL);
#endif
----

I use cscope-15.6 / vim-7.1 / CentOS 4.5.

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