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64d38fdd99
This change fixes the initial state of the main thread of remote
targets which have no concept of threading. Such targets are
treated as single-threaded by gdb, and this single thread needs
to be initially set to the "resumed" state, in the same manner as
threads in thread-aware remote targets (see remote.c,
remote_target::remote_add_thread).
Without this fix, the following assert was triggered on thread-
unaware remote targets:
remote_target::select_thread_for_ambiguous_stop_reply(const target_waitstatus*): Assertion `first_resumed_thread != nullptr' failed.
The bug can be reproduced using gdbserver
* by disabling packets 'T' and 'qThreadInfo', or
* by disabling all thread-related packets.
The test suite has been updated to include these two scenarios, see
gdb.server/stop-reply-no-thread.exp.
Change-Id: I2c39c9de17e8d6922a8c1b9e259eb316a554a43d