Windows gdb+gdbserver: Make last_sig per-thread state

With non-stop mode, each thread is controlled independently of the
others, and each thread has its own independent reason for its last
stop.

Thus, any thread-specific state that is currently per-process must be
converted to per-thread state.

This patch converts windows_process_info::last_sig to per-thread
state, moving it to windows_thread_info instead.

This adjusts both native gdb and gdbserver.

Change-Id: Ice09a5d932c912210608d5af25e1898f823e3c99

1 files changed, 3 insertions, 7 deletions

diff --git a/gdb/windows-nat.c b/gdb/windows-nat.c
index bba8468..3b01f50 100644
--- a/gdb/windows-nat.c
+++ b/gdb/windows-nat.c
@@ -1349,6 +1349,7 @@ windows_per_inferior::continue_one_thread (windows_thread_info *th,
 	}
     }
   th->resume ();
+  th->last_sig = GDB_SIGNAL_0;
 }
 
 /* Resume thread specified by ID, or all artificially suspended
@@ -1449,7 +1450,7 @@ windows_nat_target::resume (ptid_t ptid, int step, enum gdb_signal sig)
 	  DEBUG_EXCEPT ("Cannot continue with signal %d here.  "
 			"Not stopped for EXCEPTION_DEBUG_EVENT", sig);
 	}
-      else if (sig == windows_process.last_sig)
+      else if (sig == th->last_sig)
 	continue_status = DBG_EXCEPTION_NOT_HANDLED;
       else
 #if 0
@@ -1473,11 +1474,9 @@ windows_nat_target::resume (ptid_t ptid, int step, enum gdb_signal sig)
 	}
 #endif
       DEBUG_EXCEPT ("Can only continue with received signal %d.",
-		    windows_process.last_sig);
+		    th->last_sig);
     }
 
-  windows_process.last_sig = GDB_SIGNAL_0;
-
 #ifdef __x86_64__
   if (windows_process.wow64_process)
     {
@@ -1590,8 +1589,6 @@ windows_nat_target::get_windows_debug_event
 	}
     }
 
-  windows_process.last_sig = GDB_SIGNAL_0;
-
   if ((options & TARGET_WNOHANG) != 0 && !m_debug_event_pending)
     {
       ourstatus->set_ignore ();
@@ -1910,7 +1907,6 @@ windows_nat_target::do_initial_windows_stuff (DWORD pid, bool attaching)
 {
   struct inferior *inf;
 
-  windows_process.last_sig = GDB_SIGNAL_0;
   windows_process.open_process_used = 0;
 #ifdef __CYGWIN__
   windows_process.cygwin_load_start = 0;