Bruno Larsen
daaf7acf47
The test case added here is testing the bug gdb/28856, where calling a function by hand from a pretty printer makes GDB crash. There are 6 mechanisms to trigger this crash in the current test, using the commands backtrace, up, down, finish, step and continue. Since the failure happens because of use-after-free (more details below) the tests will always have a chance of passing through sheer luck, but anecdotally they seem to fail all of the time. The reason GDB is crashing is a use-after-free problem. The above mentioned functions save a pointer to the current frame's information, then calls the pretty printer, and uses the saved pointer for different reasons, depending on the function. The issue happens because call_function_by_hand needs to reset the obstack to get the current frame, invalidating the saved pointer.
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.