i3 - improved tiling WM

Add valgrind suppression file to testcases

Patch status: merged

Patch by Tony Crisci

Long description:

The suppression file makes valgrind output more readable by hiding
reports of memory leaks for GObject-related initialization functions in
Pango and Cairo.

To apply this patch, use:
curl http://cr.i3wm.org/patch/458/raw.patch | git am

b/testcases/lib/SocketActivation.pm

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@@ -110,6 +110,7 @@ sub activate_i3 {
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         if ($args{valgrind}) {
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             $i3cmd =
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                 qq|valgrind -v --log-file="$outdir/valgrind-for-$test.log" | .
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+                qq|--suppressions="./valgrind.supp" | .
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                 qq|--leak-check=full --track-origins=yes --num-callers=20 | .
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                 qq|--tool=memcheck -- $i3cmd|;
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         }

b/testcases/valgrind.supp

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@@ -0,0 +1,37 @@
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+#
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+# Valgrind suppression file for i3 testcases
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+#
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+# Format specification:
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+# http://valgrind.org/docs/manual/manual-core.html#manual-core.suppress
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+#
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+
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+#
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+# GLib
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+#
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+{
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+    Ignore fundamental GType registration
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+    Memcheck:Leak
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+    ...
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+    fun:g_type_register_fundamental
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+    ...
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+}
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+
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+{
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+    Ignore static GType registration
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+    Memcheck:Leak
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+    match-leak-kinds: possible
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+    ...
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+    fun:g_type_register_static
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+    ...
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+}
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+
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+{
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+    Ignore GObject init function
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+    Memcheck:Leak
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+    match-leak-kinds: possible
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+    ...
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+    obj:/usr/lib/libgobject-2.0*
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+    ...
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+    fun:call_init.part.0
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+    ...
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+}