Pedro Alves
73e8dc90a8
Back in:
commit 85ae1317ad
Author: Stan Shebs <shebs@codesourcery.com>
AuthorDate: Thu Dec 8 02:27:47 1994 +0000
* source.c: Various cosmetic changes.
(forward_search_command): Handle very long source lines correctly.
a buffer with a hard limit was converted to a heap buffer:
@@ -1228,15 +1284,26 @@ forward_search_command (regex, from_tty)
stream = fdopen (desc, FOPEN_RT);
clearerr (stream);
while (1) {
-/* FIXME!!! We walk right off the end of buf if we get a long line!!! */
- char buf[4096]; /* Should be reasonable??? */
- register char *p = buf;
+ static char *buf = NULL;
+ register char *p;
+ int cursize, newsize;
+
+ cursize = 256;
+ buf = xmalloc (cursize);
+ p = buf;
However, reverse_search_command has the exact same problem, and that
wasn't fixed. We still have that "we walk right off" comment...
Recently, the xmalloc above was replaced with a xrealloc, because as
can be seen above, that 'buf' variable above was a static local,
otherwise we'd be leaking. This commit replaces that and the
associated manual buffer growing with a gdb::def_vector<char>. I
don't think there's much point in reusing the buffer across command
invocations.
While doing this, I realized that reverse_search_command is almost
identical to forward_search_command. So this commit factors out a
common helper function instead of duplicating a lot of code.
There are some tests for "forward-search" in gdb.base/list.exp, but
since they use the "search" alias, they were a bit harder to find than
expected. That's now fixed, both by testing both variants, and by
adding some commentary. Also, there are no tests for the
"reverse-search" command, so this commit adds some for that too.
gdb/ChangeLog:
2018-12-08 Pedro Alves <palves@redhat.com>
* source.c (forward_search_command): Rename to ...
(search_command_helper): ... this. Add 'forward' parameter.
Tweak to use a gdb::def_vector<char> instead of a xrealloc'ed
buffer. Handle backward searches too.
(forward_search_command, reverse_search_command): Reimplement by
calling search_command_helper.
gdb/testsuite/ChangeLog:
2018-12-08 Pedro Alves <palves@redhat.com>
* gdb.base/list.exp (test_forward_search): Rename to ...
(test_forward_reverse_search): ... this. Also test reverse-search
and the forward-search alias.
README for GNU development tools This directory contains various GNU compilers, assemblers, linkers, debuggers, etc., plus their support routines, definitions, and documentation. If you are receiving this as part of a GDB release, see the file gdb/README. If with a binutils release, see binutils/README; if with a libg++ release, see libg++/README, etc. That'll give you info about this package -- supported targets, how to use it, how to report bugs, etc. It is now possible to automatically configure and build a variety of tools with one command. To build all of the tools contained herein, run the ``configure'' script here, e.g.: ./configure make To install them (by default in /usr/local/bin, /usr/local/lib, etc), then do: make install (If the configure script can't determine your type of computer, give it the name as an argument, for instance ``./configure sun4''. You can use the script ``config.sub'' to test whether a name is recognized; if it is, config.sub translates it to a triplet specifying CPU, vendor, and OS.) If you have more than one compiler on your system, it is often best to explicitly set CC in the environment before running configure, and to also set CC when running make. For example (assuming sh/bash/ksh): CC=gcc ./configure make A similar example using csh: setenv CC gcc ./configure make Much of the code and documentation enclosed is copyright by the Free Software Foundation, Inc. See the file COPYING or COPYING.LIB in the various directories, for a description of the GNU General Public License terms under which you can copy the files. REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info on where and how to report problems.