From a6b5be76f94664406def040d79ac8bc4d4aa8bd0 Mon Sep 17 00:00:00 2001 From: Markus Metzger Date: Thu, 27 Aug 2015 16:24:38 +0200 Subject: [PATCH] btrace: async The record btrace target runs synchronous with GDB. That is, GDB steps resumed threads in record btrace's to_wait method. Without GDB calling to_wait, nothing happens 'on the target'. Check for further expected events in to_wait before reporting the current event and mark record btrace's async event handler in async mode. gdb/ * record-btrace.c (record_btrace_maybe_mark_async_event): New. (record_btrace_wait): Call record_btrace_maybe_mark_async_event. --- gdb/ChangeLog | 5 +++++ gdb/record-btrace.c | 27 +++++++++++++++++++++++++++ 2 files changed, 32 insertions(+) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 4c6d0e1..be86243 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,10 @@ 2015-09-18 Markus Metzger + * record-btrace.c (record_btrace_maybe_mark_async_event): New. + (record_btrace_wait): Call record_btrace_maybe_mark_async_event. + +2015-09-18 Markus Metzger + * record-btrace.c (get_thread_current_frame): New. (record_btrace_start_replaying): Call get_thread_current_frame. diff --git a/gdb/record-btrace.c b/gdb/record-btrace.c index 0514471..764b349 100644 --- a/gdb/record-btrace.c +++ b/gdb/record-btrace.c @@ -2240,6 +2240,29 @@ record_btrace_step_thread (struct thread_info *tp) typedef struct thread_info * tp_t; DEF_VEC_P (tp_t); +/* Announce further events if necessary. */ + +static void +record_btrace_maybe_mark_async_event (const VEC (tp_t) *moving, + const VEC (tp_t) *no_history) +{ + int more_moving, more_no_history; + + more_moving = !VEC_empty (tp_t, moving); + more_no_history = !VEC_empty (tp_t, no_history); + + if (!more_moving && !more_no_history) + return; + + if (more_moving) + DEBUG ("movers pending"); + + if (more_no_history) + DEBUG ("no-history pending"); + + mark_async_event_handler (record_btrace_async_inferior_event_handler); +} + /* The to_wait method of target record-btrace. */ static ptid_t @@ -2355,6 +2378,10 @@ record_btrace_wait (struct target_ops *ops, ptid_t ptid, ALL_NON_EXITED_THREADS (tp) record_btrace_cancel_resume (tp); + /* In async mode, we need to announce further events. */ + if (target_is_async_p ()) + record_btrace_maybe_mark_async_event (moving, no_history); + /* Start record histories anew from the current position. */ record_btrace_clear_histories (&eventing->btrace); -- 2.7.4