init.sh: enable MALLOC_PERTURB_

* tests/init.sh: Enable glibc's malloc-perturbing option.

1 files changed, 7 insertions, 0 deletions

diff --git a/tests/init.sh b/tests/init.sh
index 7772736970..1c0b4b4f11 100644
--- a/tests/init.sh
+++ b/tests/init.sh
@@ -94,6 +94,13 @@ fi
 
 test -n "$EXEEXT" && shopt -s expand_aliases
 
+# Enable glibc's malloc-perturbing option.
+# This is cheap and useful for exposing code that depends on the fact that
+# malloc-related functions often return memory that is mostly zeroed.
+# If you have the time and cycles, use valgrind to do an even better job.
+${MALLOC_PERTURB_=87}
+export MALLOC_PERTURB_
+
 # We use a trap below for cleanup.  This requires us to go through
 # hoops to get the right exit status transported through the handler.
 # So use `Exit STATUS' instead of `exit STATUS' inside of the tests.