[Qemu-devel] [RFC PATCH v4 11/13] cpu-exec: trigger a debug request when rexec stops.

[fred.konrad@greensocs.com]

From: KONRAD Frederic <fred.konrad@greensocs.com>

This allows QEMU to trigger a debug exception when cexe_dbg_requested
is set.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
---
 cpu-exec.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/cpu-exec.c b/cpu-exec.c
index 38e5f02..c92cfd1 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -22,6 +22,7 @@
 #include "tcg.h"
 #include "qemu/atomic.h"
 #include "sysemu/qtest.h"
+#include "reverse-execution.h"
 
 void cpu_loop_exit(CPUState *cpu)
 {
@@ -230,6 +231,18 @@ int cpu_exec(CPUArchState *env)
     /* This must be volatile so it is not trashed by longjmp() */
     volatile bool have_tb_lock = false;
 
+    #ifndef CONFIG_USER_ONLY
+    if (cexe_is_enabled() && cexe_dbg_requested()) {
+        /*
+         * Reverse execution need to stop right now.
+         * So just generate a EXCP_DEBUG.
+         */
+        cpu->exception_index = EXCP_DEBUG;
+        cpu_handle_debug_exception(env);
+        return EXCP_DEBUG;
+    }
+    #endif /* !CONFIG_USER_ONLY */
+
     if (cpu->halted) {
         if (!cpu_has_work(cpu)) {
             return EXCP_HALTED;
-- 
1.9.0