monitor: Check whether TCG is enabled before running the "info jit" code

The "info jit" command currently aborts on Mac OS X with the message
"qemu_mutex_lock: Invalid argument" when running with "-M accel=qtest".
We should only call into the TCG code here if TCG has really been
enabled and initialized.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1493179907-22516-1-git-send-email-thuth@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Tested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
(cherry picked from commit b7da97eef74bf834be244de0796ccb01db3985c9)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

diff --git a/monitor.c b/monitor.c
index 957361c6f0d838585507ff30a0334afc08d0616f..ea0a1a2bb56b6d7bb3d3a560952a5869525f9119 100644 (file)
--- a/monitor.c
+++ b/monitor.c
@@ -1091,6 +1091,11 @@ static void hmp_info_registers(Monitor *mon, const QDict *qdict)
 
 static void hmp_info_jit(Monitor *mon, const QDict *qdict)
 {
+    if (!tcg_enabled()) {
+        error_report("JIT information is only available with accel=tcg");
+        return;
+    }
+
     dump_exec_info((FILE *)mon, monitor_fprintf);
     dump_drift_info((FILE *)mon, monitor_fprintf);
 }