[PATCH v3 07/11] tests/qtest/migration-test: Build command line using GString API (1/4)

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

Part 1/4: Convert memory & machine options.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 tests/qtest/migration-test.c | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
index f96c73f552..9cdef4fa65 100644
--- a/tests/qtest/migration-test.c
+++ b/tests/qtest/migration-test.c
@@ -582,6 +582,7 @@ typedef struct {
 static int test_migrate_start(QTestState **from, QTestState **to,
                               const char *uri, MigrateStart *args)
 {
+    g_autoptr(GString) cmd_common = NULL;
     g_autofree gchar *arch_source = NULL;
     g_autofree gchar *arch_target = NULL;
     g_autofree gchar *cmd_target = NULL;
@@ -601,6 +602,9 @@ static int test_migrate_start(QTestState **from, QTestState **to,
     }
 
     got_stop = false;
+
+    cmd_common = g_string_new("");
+
     bootpath = g_strdup_printf("%s/bootsect", tmpfs);
     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
         /* the assembled x86 boot sector should be exactly one sector large */
@@ -644,6 +648,10 @@ static int test_migrate_start(QTestState **from, QTestState **to,
     } else {
         g_assert_not_reached();
     }
+    if (machine_opts) {
+        g_string_append_printf(cmd_common, " -machine %s ", machine_opts);
+    }
+    g_string_append_printf(cmd_common, "-m %s ", memory_size);
 
     if (!getenv("QTEST_LOG") && args->hide_stderr) {
 #ifdef _WIN32
@@ -674,33 +682,29 @@ static int test_migrate_start(QTestState **from, QTestState **to,
     if (!args->only_target) {
         g_autofree gchar *cmd_source = NULL;
 
-        cmd_source = g_strdup_printf("-accel kvm%s -accel tcg%s%s "
+        cmd_source = g_strdup_printf("-accel kvm%s -accel tcg %s "
                                      "-name source,debug-threads=on "
-                                     "-m %s "
                                      "-serial file:%s/src_serial "
                                      "%s %s %s %s",
                                      args->use_dirty_ring ?
                                      ",dirty-ring-size=4096" : "",
-                                     machine_opts ? " -machine " : "",
-                                     machine_opts ? machine_opts : "",
-                                     memory_size, tmpfs,
+                                     cmd_common->str,
+                                     tmpfs,
                                      arch_source, shmem_opts,
                                      args->opts_source ? args->opts_source : "",
                                      ignore_stderr);
         *from = qtest_init(cmd_source);
     }
 
-    cmd_target = g_strdup_printf("-accel kvm%s -accel tcg%s%s "
+    cmd_target = g_strdup_printf("-accel kvm%s -accel tcg %s "
                                  "-name target,debug-threads=on "
-                                 "-m %s "
                                  "-serial file:%s/dest_serial "
                                  "-incoming %s "
                                  "%s %s %s %s",
                                  args->use_dirty_ring ?
                                  ",dirty-ring-size=4096" : "",
-                                 machine_opts ? " -machine " : "",
-                                 machine_opts ? machine_opts : "",
-                                 memory_size, tmpfs, uri,
+                                 cmd_common->str,
+                                 tmpfs, uri,
                                  arch_target, shmem_opts,
                                  args->opts_target ? args->opts_target : "",
                                  ignore_stderr);
-- 
2.38.1