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[commit] Reset a few infrun variables


This patch is mostly on principle; the stop_stack_dummy
change fixes confusion if you disconnect from a target while it's
stopped at a dummy frame and reconnect to it when it's stopped at a
shared library load event.  I don't remember what motivated the
additional reset of target_last_wait_ptid but it's clearly right.
At init_wait_for_inferior the last target to stop is unrelated to the
next one.

Tested on x86_64-linux and committed.

-- 
Daniel Jacobowitz
CodeSourcery

2007-12-06  Daniel Jacobowitz  <dan@codesourcery.com>

	* infrun.c (init_wait_for_inferior): Reset target_last_wait_ptid.
	(handle_inferior_event): Clear stop_stack_dummy earlier.

Index: src/gdb/infrun.c
===================================================================
--- src.orig/gdb/infrun.c	2007-12-06 14:26:01.000000000 -0500
+++ src/gdb/infrun.c	2007-12-06 14:26:07.000000000 -0500
@@ -888,6 +888,8 @@ init_wait_for_inferior (void)
 
   stepping_past_singlestep_breakpoint = 0;
   stepping_past_breakpoint = 0;
+
+  target_last_wait_ptid = minus_one_ptid;
 }
 
 /* This enum encodes possible reasons for doing a target_wait, so that
@@ -1249,6 +1251,9 @@ handle_inferior_event (struct execution_
   target_last_wait_ptid = ecs->ptid;
   target_last_waitstatus = *ecs->wp;
 
+  /* Always clear state belonging to the previous time we stopped.  */
+  stop_stack_dummy = 0;
+
   adjust_pc_after_break (ecs);
 
   switch (ecs->infwait_state)
@@ -1866,7 +1871,6 @@ handle_inferior_event (struct execution_
   ecs->another_trap = 0;
   bpstat_clear (&stop_bpstat);
   stop_step = 0;
-  stop_stack_dummy = 0;
   stop_print_frame = 1;
   ecs->random_signal = 0;
   stopped_by_random_signal = 0;


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