[sysprof] libsysprof-capture: add sysprof_collector_log_printf()

[Christian Hergert <chergert src gnome org>]

commit 3d546eb6d1e0d790286fb9813d644a8591f00392
Author: Christian Hergert <chergert redhat com>
Date:   Mon Mar 16 12:24:17 2020 -0700

    libsysprof-capture: add sysprof_collector_log_printf()
    
    This is a convenience function to call sysprof_collector_log() while also
    formatting the message.
    
    Ideally we'd be able to avoid the string format if we are not currently
    collecting data, but that can be left for a future commit. We don't have
    recursive locks so we need to duplicate the structure setup.

 src/libsysprof-capture/sysprof-collector.c | 16 ++++++++++++++++
 src/libsysprof-capture/sysprof-collector.h |  5 +++++
 2 files changed, 21 insertions(+)
---
diff --git a/src/libsysprof-capture/sysprof-collector.c b/src/libsysprof-capture/sysprof-collector.c
index 985fee7..5f06dd3 100644
--- a/src/libsysprof-capture/sysprof-collector.c
+++ b/src/libsysprof-capture/sysprof-collector.c
@@ -454,3 +454,19 @@ sysprof_collector_log (GLogLevelFlags  severity,
 
   } COLLECTOR_END;
 }
+
+void
+sysprof_collector_log_printf (GLogLevelFlags  severity,
+                              const gchar    *domain,
+                              const gchar    *format,
+                              ...)
+{
+  g_autofree gchar *formatted = NULL;
+  va_list args;
+
+  va_start (args, format);
+  formatted = g_strdup_vprintf (format, args);
+  va_end (args);
+
+  sysprof_collector_log (severity, domain, formatted);
+}
diff --git a/src/libsysprof-capture/sysprof-collector.h b/src/libsysprof-capture/sysprof-collector.h
index 6e1f9ed..68ac688 100644
--- a/src/libsysprof-capture/sysprof-collector.h
+++ b/src/libsysprof-capture/sysprof-collector.h
@@ -81,5 +81,10 @@ SYSPROF_AVAILABLE_IN_3_36
 void sysprof_collector_log      (GLogLevelFlags         severity,
                                  const gchar           *domain,
                                  const gchar           *message);
+SYSPROF_AVAILABLE_IN_3_38
+void sysprof_collector_log_printf (GLogLevelFlags         severity,
+                                   const gchar           *domain,
+                                   const gchar           *format,
+                                   ...) G_GNUC_PRINTF (3, 4);
 
 G_END_DECLS