[PATCH 17/18] gdbstub: Pause all CPUs before sending stop replies

[Ilya Leoshkevich <iii@linux.ibm.com>]

This is required by the GDB remote protocol.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
 gdbstub/gdbstub.c |  2 ++
 gdbstub/user.c    | 10 +++++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index a096104b07a..be632f8b214 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -2497,6 +2497,8 @@ bool gdb_try_stop(void)
         return false;
     }
 
+    pause_all_vcpus();
+
     gdbserver_state.allow_stop_reply = false;
     return true;
 }
diff --git a/gdbstub/user.c b/gdbstub/user.c
index 82007b09db6..3095c846a99 100644
--- a/gdbstub/user.c
+++ b/gdbstub/user.c
@@ -458,6 +458,7 @@ static void disable_gdbstub(CPUState *thread_cpu)
         cpu_breakpoint_remove_all(cpu, BP_GDB);
         /* no cpu_watchpoint_remove_all for user-mode */
         cpu_single_step(cpu, 0);
+        cpu_resume(cpu);
     }
     tb_flush(thread_cpu);
 }
@@ -650,9 +651,16 @@ int gdb_continue_partial(char *newstates)
      * previous situation, where only one CPU would be single-stepped.
      */
     CPU_FOREACH(cpu) {
-        if (newstates[cpu->cpu_index] == 's') {
+        switch (newstates[cpu->cpu_index]) {
+        case 's':
             trace_gdbstub_op_stepping(cpu->cpu_index);
             cpu_single_step(cpu, gdbserver_state.sstep_flags);
+            QEMU_FALLTHROUGH;
+        case 'c':
+        case 'C':
+        case 'S':
+            cpu_resume(cpu);
+            break;
         }
     }
     gdbserver_user_state.running_state = 1;
-- 
2.46.0