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If we make GDB report the process EXIT event for the leader thread, as will be done in a latter patch of this series, then gdb.threads/current-lwp-dead.exp starts failing: (gdb) break fn_return Breakpoint 2 at 0x5555555551b5: file /home/pedro/rocm/gdb/build/gdb/testsuite/../../../src/gdb/testsuite/gdb.threads/current-lwp-dead.c, line 45. (gdb) continue Continuing. [New LWP 2138466] [Inferior 1 (process 2138459) exited normally] (gdb) FAIL: gdb.threads/current-lwp-dead.exp: continue to breakpoint: fn_return (the program exited) The inferior exit reported is actually correct. The main thread has indeed exited, and that's the thread that has the right exit code to report to the user, as that's the exit code that is reported to the program's parent. In this case, GDB managed to collect the exit code for the leader thread before reaping the other thread, because in reality, the testcase isn't creating standard threads, it is using raw clone, and the new clones are put in their own thread group. Fix it by making the main "thread" not exit until the scenario we're exercising plays out. Also, run the program to completion for completeness. The original program really wanted the leader thread to exit before the fn_return function was reached -- it was important that the current thread as pointed by inferior_ptid was gone when infrun got the breakpoint event. I've tweaked the testcase to ensure that that condition is still held, though it is no longer the main thread that exits. This required a bit of synchronization between the threads, which required using CLONE_VM unconditionally. The #ifdef guards were added as a fix for https://sourceware.org/bugzilla/show_bug.cgi?id=11214, though I don't think they were necessary because the program is not using TLS. If it turns out they were necessary, we can link the testcase with "-z now" instead, which was mentioned as an alternative workaround in that Bugzilla. Change-Id: I7be2f0da4c2fe8f80a60bdde5e6c623d8bd5a0aa
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.