Detect leaks in test suite with Asan

Leaks from libfontconfig.so are excluded for now, as it doesn't seem to
be our fault. The gcc mechanism to suppress leaks doesn't seem to be
working, so we fallback to awk.

In the presence of leaks, that specific test will fail by returning
non-zero, but this will not be what we want for those tests that are
currently failing with XPASS. We will only consider the ones that are
passing as those targeted for leak detection.

1 files changed, 14 insertions, 0 deletions

diff --git a/test/html/leakfilter.awk b/test/html/leakfilter.awk
new file mode 100644
index 00000000..381ed0a7
--- /dev/null
+++ b/test/html/leakfilter.awk
@@ -0,0 +1,14 @@
+# Detect beginning of leak message
+/^Direct leak/                  { msg=msg "\n" $0; inleak=1; next }
+
+# Ignore anything coming from libfontconfig.so
+inleak && /libfontconfig.so/    { inleak=0; msg="" }
+
+# Store leak line
+inleak && /^ +#/                { msg=msg "\n" $0; next }
+
+# End of the leak lines, print and finish
+inleak                          { inleak=0; print msg; msg=""; nleaks++ }
+
+# At exit count filtered leaks and fail accordingly
+END { printf "\n==== Total leaks after filter: %d ====\n\n", nleaks; if (nleaks > 0) { exit 1 } }