09635af7cd
As it happens we have a board that fails a gdb.base/gcore-relro.exp test case reproducibly and moreover the case appears to trigger a kernel bug making the it less than usable. Specifically the board remains responsive to some extent, however processes do not appear to be able to successfully complete termination anymore and perhaps more importantly further gdbserver processes can be started, but they never reach the stage of listening on the RSP socket. This change handles timeouts in gdbserver start properly, by throwing a TCL error exception when gdbserver does not report listening on the RSP socket in time. This is then caught at the outer level and reported, and 2 rather than 1 is returned so that the caller may tell the failure to start gdbserver and other issues apart and act accordingly (or do nothing). I thought letting the exception unwind further on might be a good idea for any test harnesses out there to break outright where a gdbserver start error is silently ignored right now, however I figured out the calls to gdbserver-support.exp are buried down too deep in the GDB test suite for such a change to be made easily. I think returning a distinct return value is good enough (the API says "non-zero", so 2 is as good as 1) and we can always make the error harder in a later step if required. With config/gdbserver.exp being used this change remains transparent to the target board, the return value is passed up by gdb_reload and the error exception unwinds through gdbserver_gdb_load and is caught and handled by mi_gdb_target_load. A call to perror is still made, reporting the timeout, and in the case of mi_gdb_target_load the procedure returns a value denoting unsuccessful completion. An unsuccessful completion of gdb_reload is already handled elsewhere. An alternative gdbserver board configuration can interpret the return value in its gdb_reload implementation and catch the error in gdbserver_gdb_load in an attempt to recover a target board that has gone astray, for example by rebooting the board somehow. This has proved effective with our failing board, that now completes the remaining test cases with no further hiccups. * lib/gdbserver-support.exp (gdbserver_start): Throw an error exception on timeout. (gdbserver_run): Catch any `gdbserver_spawn' error exceptions. (gdbserver_start_extended): Catch any `gdbserver_start' error exceptions. (gdbserver_start_multi, mi_gdbserver_start_multi): Likewise. * lib/mi-support.exp (mi_gdb_target_load): Catch any `gdbserver_gdb_load' error exceptions. |
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| include | ||
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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.