Add sysprof tracing support

Add support for adding sysprof marks.
Strongly inspired by equivalent GLib support.

3 files changed, 94 insertions, 0 deletions

diff --git a/pango/meson.build b/pango/meson.build
index 11578ddf..4c055f52 100644
--- a/pango/meson.build
+++ b/pango/meson.build
@@ -177,6 +177,7 @@ if build_pangoft2
     'pangofc-font.c',
     'pangofc-fontmap.c',
     'pangofc-decoder.c',
+    'pango-trace.c',
   ]
 
   pangoot_headers = [
diff --git a/pango/pango-trace-private.h b/pango/pango-trace-private.h
new file mode 100644
index 00000000..5d2a4fdf
--- /dev/null
+++ b/pango/pango-trace-private.h
@@ -0,0 +1,53 @@
+/* Pango
+ * pango-trace-private.h:
+ *
+ * Copyright (C) 2020 Red Hat, Inc
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+
+#ifdef HAVE_SYSPROF
+#include <sysprof-capture.h>
+#endif
+
+#include <glib.h>
+
+G_BEGIN_DECLS
+
+#ifdef HAVE_SYSPROF
+#define PANGO_TRACE_CURRENT_TIME SYSPROF_CAPTURE_CURRENT_TIME
+#else
+#define PANGO_TRACE_CURRENT_TIME 0
+#endif
+
+void pango_trace_mark (gint64       begin_time,
+                       const gchar *name,
+                       const gchar *message_format,
+                       ...) G_GNUC_PRINTF (3, 4);
+
+#ifndef HAVE_SYSPROF
+/* Optimise the whole call out */
+#if defined(G_HAVE_ISO_VARARGS)
+#define g_trace_mark(b, n, m, ...)
+#elif defined(G_HAVE_GNUC_VARARGS)
+#define g_trace_mark(b, n, m...)
+#else
+/* no varargs macro support; the call will have to be optimised out by the compiler */
+#endif
+#endif
+
+G_END_DECLS
diff --git a/pango/pango-trace.c b/pango/pango-trace.c
new file mode 100644
index 00000000..9f37376d
--- /dev/null
+++ b/pango/pango-trace.c
@@ -0,0 +1,40 @@
+/* Pango
+ * pango-trace.c:
+ *
+ * Copyright (C) 2020 Red Hat, Inc
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include "pango-trace-private.h"
+
+#include <stdarg.h>
+
+void
+(pango_trace_mark) (gint64       begin_time,
+                    const gchar *name,
+                    const gchar *message_format,
+                    ...)
+{
+#ifdef HAVE_SYSPROF
+  gint64 end_time = PANGO_TRACE_CURRENT_TIME;
+  va_list args;
+
+  va_start (args, message_format);
+  sysprof_collector_mark_vprintf (begin_time, end_time - begin_time, "Pango", name, message_format, args);
+  va_end (args);
+#endif  /* HAVE_SYSPROF */
+}