[PATCH 3/7] tests/qtest/migration: Initialize MigrationTestEnv::arch early

[Philippe Mathieu-Daudé]

Some tests expect MigrationTestEnv::arch to be set. Initialize
it early enough to avoid SIGSEGV, for example like the following
g_str_equal() call in migration/precopy-tests.c:

   954 void migration_test_add_precopy(MigrationTestEnv *env)
   955 {
   ...
  1001     if (g_str_equal(env->arch, "x86_64") && env->has_dirty_ring) {
  1002
  1003         migration_test_add("/migration/dirty_ring",
  1004                            test_precopy_unix_dirty_ring);

Signed-off-by: Philippe Mathieu-Daudé <phi...@linaro.org>
---
 tests/qtest/migration/framework.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tests/qtest/migration/framework.c 
b/tests/qtest/migration/framework.c
index a3bd92a9519..38a0a1a5264 100644
--- a/tests/qtest/migration/framework.c
+++ b/tests/qtest/migration/framework.c
@@ -938,6 +938,8 @@ MigrationTestEnv *migration_get_env(void)
         exit(1);
     }
 
+    env->arch = qtest_get_arch();
+
     env->has_kvm = qtest_has_accel("kvm");
     env->has_tcg = qtest_has_accel("tcg");
 
@@ -948,7 +950,6 @@ MigrationTestEnv *migration_get_env(void)
 
     env->has_dirty_ring = env->has_kvm && kvm_dirty_ring_supported();
     env->has_uffd = ufd_version_check(&env->uffd_feature_thread_id);
-    env->arch = qtest_get_arch();
     env->is_x86 = !strcmp(env->arch, "i386") || !strcmp(env->arch, "x86_64");
 
     env->tmpfs = g_dir_make_tmp("migration-test-XXXXXX", &err);
-- 
2.47.1