From 18bcc450bbd6db8b124a8e6e218bde9846e5c3d5 Mon Sep 17 00:00:00 2001
From: Yan Wang <wangyan122@huawei.com>
Date: Thu, 24 Mar 2022 12:10:30 +0800
Subject: [PATCH 03/16] :qemuMonitorJSONMakeCommandInternal: Clear @arguments
 when stolen

All callers of qemuMonitorJSONMakeCommandInternal will benefit from
making @arguments a double pointer and passing it to
virJSONValueObjectCreate directly which will clear it if it steals the
value.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Yan Wang <wangyan122@huawei.com>
---
 src/qemu/qemu_monitor_json.c | 27 ++++++++++-----------------
 1 file changed, 10 insertions(+), 17 deletions(-)

diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index ce7f35e2ca..cc6644c9c3 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -546,20 +546,18 @@ qemuMonitorJSONTransactionAdd(virJSONValuePtr actions,
  *
  * Create a JSON object used on the QMP monitor to call a command.
  *
- * Note that @arguments is always consumed and should not be referenced after
- * the call to this function.
+ * Note that @arguments is consumed and cleared.
  */
 static virJSONValuePtr
 qemuMonitorJSONMakeCommandInternal(const char *cmdname,
-                                   virJSONValuePtr arguments)
+                                   virJSONValuePtr *arguments)
 {
     virJSONValuePtr ret = NULL;
 
     ignore_value(virJSONValueObjectCreate(&ret,
                                           "s:execute", cmdname,
-                                          "A:arguments", &arguments, NULL));
+                                          "A:arguments", arguments, NULL));
 
-    virJSONValueFree(arguments);
     return ret;
 }
 
@@ -569,7 +567,7 @@ qemuMonitorJSONMakeCommand(const char *cmdname,
                            ...)
 {
     virJSONValuePtr obj = NULL;
-    virJSONValuePtr jargs = NULL;
+    g_autoptr(virJSONValue) jargs = NULL;
     va_list args;
 
     va_start(args, cmdname);
@@ -577,7 +575,7 @@ qemuMonitorJSONMakeCommand(const char *cmdname,
     if (virJSONValueObjectCreateVArgs(&jargs, args) < 0)
         goto cleanup;
 
-    obj = qemuMonitorJSONMakeCommandInternal(cmdname, jargs);
+    obj = qemuMonitorJSONMakeCommandInternal(cmdname, &jargs);
 
  cleanup:
     va_end(args);
@@ -3469,9 +3467,8 @@ qemuMonitorJSONSetMigrationParams(qemuMonitorPtr mon,
 {
     g_autoptr(virJSONValue) cmd = NULL;
     g_autoptr(virJSONValue) reply = NULL;
-    virJSONValuePtr par = g_steal_pointer(params);
 
-    if (!(cmd = qemuMonitorJSONMakeCommandInternal("migrate-set-parameters", par)))
+    if (!(cmd = qemuMonitorJSONMakeCommandInternal("migrate-set-parameters", params)))
         return -1;
 
     if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
@@ -3998,9 +3995,8 @@ qemuMonitorJSONAddNetdev(qemuMonitorPtr mon,
 {
     g_autoptr(virJSONValue) cmd = NULL;
     g_autoptr(virJSONValue) reply = NULL;
-    virJSONValuePtr pr = g_steal_pointer(props);
 
-    if (!(cmd = qemuMonitorJSONMakeCommandInternal("netdev_add", pr)))
+    if (!(cmd = qemuMonitorJSONMakeCommandInternal("netdev_add", props)))
         return -1;
 
     if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
@@ -4431,9 +4427,8 @@ qemuMonitorJSONAddObject(qemuMonitorPtr mon,
 {
     g_autoptr(virJSONValue) cmd = NULL;
     g_autoptr(virJSONValue) reply = NULL;
-    virJSONValuePtr pr = g_steal_pointer(props);
 
-    if (!(cmd = qemuMonitorJSONMakeCommandInternal("object-add", pr)))
+    if (!(cmd = qemuMonitorJSONMakeCommandInternal("object-add", props)))
         return -1;
 
     if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
@@ -8812,9 +8807,8 @@ qemuMonitorJSONBlockdevAdd(qemuMonitorPtr mon,
 {
     g_autoptr(virJSONValue) cmd = NULL;
     g_autoptr(virJSONValue) reply = NULL;
-    virJSONValuePtr pr = g_steal_pointer(props);
 
-    if (!(cmd = qemuMonitorJSONMakeCommandInternal("blockdev-add", pr)))
+    if (!(cmd = qemuMonitorJSONMakeCommandInternal("blockdev-add", props)))
         return -1;
 
     if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
@@ -8833,9 +8827,8 @@ qemuMonitorJSONBlockdevReopen(qemuMonitorPtr mon,
 {
     g_autoptr(virJSONValue) cmd = NULL;
     g_autoptr(virJSONValue) reply = NULL;
-    virJSONValuePtr pr = g_steal_pointer(props);
 
-    if (!(cmd = qemuMonitorJSONMakeCommandInternal("blockdev-reopen", pr)))
+    if (!(cmd = qemuMonitorJSONMakeCommandInternal("blockdev-reopen", props)))
         return -1;
 
     if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
-- 
2.27.0