test: Support testing malloc() failures

It is helpful to test that out-of-memory checks work correctly in code
that calls malloc().

Add a simple way to force failure after a given number of malloc() calls.

Fix a header guard to avoid a build error on sandbox_vpl.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Sean Anderson <seanga2@gmail.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/malloc.h b/include/malloc.h
index e8c8b25..161ccbd 100644
--- a/include/malloc.h
+++ b/include/malloc.h
@@ -883,6 +883,18 @@ extern Void_t*     sbrk();
 
 void malloc_simple_info(void);
 
+/**
+ * malloc_enable_testing() - Put malloc() into test mode
+ *
+ * This only works if UNIT_TESTING is enabled
+ *
+ * @max_allocs: return -ENOMEM after max_allocs calls to malloc()
+ */
+void malloc_enable_testing(int max_allocs);
+
+/** malloc_disable_testing() - Put malloc() into normal mode */
+void malloc_disable_testing(void);
+
 #if CONFIG_IS_ENABLED(SYS_MALLOC_SIMPLE)
 #define malloc malloc_simple
 #define realloc realloc_simple