This affects both the native backend and gdbserver. If a non-leader thread exits the process while all other threads are ptrace-stopped, native gdb internal-errors. I'm adding a test to the testsuite that catches this: /home/pedro/gdb/mygit/build/../src/gdb/linux-nat.c:3198: internal-error: linux_nat_filter_event: Assertion `lp->resumed' failed. A problem internal to GDB has been detected, further debugging may prove unreliable. Quit this debugging session? (y or n) FAIL: gdb.threads/non-leader-exit-process.exp: program exits normally (GDB internal error)
And then even with that fixed, both native and gdbserver still misbehave in the same way: (gdb) continue Continuing. [Thread 0x7ffff7fc0700 (LWP 15350) exited] No unwaited-for children left. Couldn't get registers: No such process. (gdb) KFAIL: gdb.threads/non-ldr-exit.exp: program exits normally (PRMS: gdb/NNN)
The master branch has been updated by Pedro Alves <palves@sourceware.org>: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=7759842763d94dc2f1c7d52d09f9203830b753ab commit 7759842763d94dc2f1c7d52d09f9203830b753ab Author: Pedro Alves <palves@redhat.com> Date: Fri Jul 24 18:18:44 2015 +0000 PR gdb/18717: internal error if non-leader thread exits process If a non-leader thread exits the process while all other threads are ptrace-stopped, native gdb fails an assertion. The test added by this commit catches it: /home/pedro/gdb/mygit/build/../src/gdb/linux-nat.c:3198: internal-error: linux_nat_filter_event: Assertion `lp->resumed' failed. A problem internal to GDB has been detected, further debugging may prove unreliable. Quit this debugging session? (y or n) FAIL: gdb.threads/non-leader-exit-process.exp: program exits normally (GDB internal error) The fix is just to remove the assertion. With that out of the way, neither GDB not GDBserver handle this perfectly though, so I'm adding a KFAIL: (gdb) continue Continuing. [Thread 0x7ffff7fc0700 (LWP 15350) exited] No unwaited-for children left. Couldn't get registers: No such process. (gdb) KFAIL: gdb.threads/non-ldr-exit.exp: program exits normally (PRMS: gdb/18717) gdb/ChangeLog: 2015-07-24 Pedro Alves <palves@redhat.com> PR gdb/18717 * linux-nat.c (linux_nat_filter_event): Don't assert that the lwp is resumed, and extend the debug log. gdb/testsuite/ChangeLog: 2015-07-24 Pedro Alves <palves@redhat.com> PR gdb/18717 * gdb.threads/non-ldr-exit.c: New file. * gdb.threads/non-ldr-exit.exp: New file.
*** Bug 19424 has been marked as a duplicate of this bug. ***