[Qemu-devel] [PATCH 2/2] tests: send error_report to test log

[Paolo Bonzini <pbonzini@redhat.com>]

Implement error_vprintf to send the output of error_report to
the test log.  This silences test-vmstate.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 include/glib-compat.h | 13 +++++++++++++
 stubs/error-printf.c  |  8 +++++++-
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/include/glib-compat.h b/include/glib-compat.h
index 8093163..9f86dc8 100644
--- a/include/glib-compat.h
+++ b/include/glib-compat.h
@@ -304,4 +304,17 @@ static inline void g_slist_free_full(GSList *list, GDestroyNotify free_func)
 }
 #endif
 
+#if !GLIB_CHECK_VERSION(2, 36, 0)
+/* Always fail.  This will not include error_report output in the test log,
+ * sending it instead to stderr.
+ */
+#define g_test_initialized() (0)
+#endif
+#if !GLIB_CHECK_VERSION(2, 38, 0)
+#ifdef CONFIG_HAS_GLIB_SUBPROCESS_TESTS
+#error schizophrenic detection of glib subprocess testing
+#endif
+#define g_test_subprocess() (0)
+#endif
+
 #endif
diff --git a/stubs/error-printf.c b/stubs/error-printf.c
index 56379e6..ac6b92a 100644
--- a/stubs/error-printf.c
+++ b/stubs/error-printf.c
@@ -4,7 +4,13 @@
 
 void error_vprintf(const char *fmt, va_list ap)
 {
-    vfprintf(stderr, fmt, ap);
+    if (g_test_initialized() && !g_test_subprocess()) {
+        char *msg = g_strdup_vprintf(fmt, ap);
+        g_test_message("%s", msg);
+        g_free(msg);
+    } else {
+        vfprintf(stderr, fmt, ap);
+    }
 }
 
 void error_vprintf_unless_qmp(const char *fmt, va_list ap)
-- 
1.8.3.1