[gjs] build: Add LSan suppression file

[Philip Chimento <pchimento src gnome org>]

commit 3b8775fa534b6f6f90a2069fed236573e180c00a
Author: Philip Chimento <philip endlessm com>
Date:   Wed Aug 30 13:29:52 2017 -0700

    build: Add LSan suppression file
    
    Compiling with ASan also automatically enables LSan (leak sanitizer).
    There is an intentional leak (of a few bytes) of GType structures in
    GJS, and SpiderMonkey also leaks a few bytes for each GC helper thread.
    Add a suppression file (unfortunately, a different format than
    Valgrind's suppression file) to make LSan ignore these leaks.
    
    One nice feature of LSan is that it prints a total of bytes leaked for
    each suppressed function.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=786995

 Makefile-test.am                |    2 ++
 installed-tests/extra/lsan.supp |    5 +++++
 2 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/Makefile-test.am b/Makefile-test.am
index 9cbdbe8..9e0fa58 100644
--- a/Makefile-test.am
+++ b/Makefile-test.am
@@ -263,6 +263,7 @@ EXTRA_DIST +=                                               \
        installed-tests/js/testCairo.js                 \
        installed-tests/js/testGtk.js                   \
        installed-tests/js/testGDBus.js                 \
+       installed-tests/extra/lsan.supp                 \
        $(NULL)
 
 ### TEST EXECUTION #####################################################
@@ -276,6 +277,7 @@ AM_TESTS_ENVIRONMENT =                                      \
        export GI_TYPELIB_PATH="$(builddir):$${GI_TYPELIB_PATH:+:$$GI_TYPELIB_PATH}"; \
        export LD_LIBRARY_PATH="$(builddir)/.libs:$${LD_LIBRARY_PATH:+:$$LD_LIBRARY_PATH}"; \
        export G_FILENAME_ENCODING=latin1;              \
+       export LSAN_OPTIONS="suppressions=$(abs_top_srcdir)/installed-tests/extra/lsan.supp"; \
        $(XVFB_START)                                   \
        $(NULL)
 
diff --git a/installed-tests/extra/lsan.supp b/installed-tests/extra/lsan.supp
new file mode 100644
index 0000000..4eadd49
--- /dev/null
+++ b/installed-tests/extra/lsan.supp
@@ -0,0 +1,5 @@
+# SpiderMonkey leaks a mutex for each GC helper thread.
+leak:js::HelperThread::threadLoop
+
+# We leak a small wrapper in GJS for each registered GType.
+leak:gjs_gtype_create_gtype_wrapper