tree 52e46df8286bc7bb660d43987950022d407d9442
parent 2012bf013b2ce507b181c0d9049ad946b2a59d8a
author Alan Hayward <alan.hayward@arm.com> 1549550194 +0000
committer Alan Hayward <alan.hayward@arm.com> 1549550265 +0000

gdbserver: When attaching, add process before lwps

The recent BP/WP changes for AArch64 swapping the order in add_lwp()
so that the process was added before the lwp. This was due to the lwp
creation requiring the process data.

This also needs changing in linux_attach().

Also add additional checks to make sure cannot attach to the same
process twice. Add test case for this - do this by splitting
attach.exp into distinct pass and error case sections.

Fixes gdb.server/ext-attach.exp on Aarch64.

gdb/gdbserver/ChangeLog:

	* linux-low.c (linux_attach): Add process before lwp.
	* server.c (attach_inferior): Check if already attached.

gdb/testsuite/ChangeLog:

	* gdb.base/attach.exp: Add double attach test.