fb85cece22
Commit b60cea7 (Make target_wait options use enum flags) broke deprecated_target_wait_hook usage: there's a commit comment telling this hook has not been converted. Rather than trying to mend it, this patch replaces the hook by two target_wait observers: target_pre_wait (ptid_t ptid) target_post_wait (ptid_t event_ptid) Upon target_wait entry, target_pre_wait is notified with the ptid passed to target_wait. Upon exit, target_post_wait is notified with the event ptid returned by target_wait. Should an exception occur, event_ptid is null_ptid. This change benefits to Insight (out-of-tree): there's no real use of the late hook in gdb itself.
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