tests for size_mul_check__()

it's important, and we should make sure we got it right.

2 files changed, 13 insertions, 0 deletions

diff --git a/src/common/util.c b/src/common/util.c
index d005dade53..884d74f71b 100644
--- a/src/common/util.c
+++ b/src/common/util.c
@@ -206,6 +206,15 @@ size_mul_check(const size_t x, const size_t y)
           x <= SIZE_MAX / y);
 }
 
+#ifdef TOR_UNIT_TESTS
+/** Exposed for unit tests only */
+int
+size_mul_check__(const size_t x, const size_t y)
+{
+  return size_mul_check(x,y);
+}
+#endif
+
 /** Allocate a chunk of <b>nmemb</b>*<b>size</b> bytes of memory, fill
  * the memory with zero bytes, and return a pointer to the result.
  * Log and terminate the process on error.  (Same as
diff --git a/src/common/util.h b/src/common/util.h
index 4c5070e65b..3a056bcd7d 100644
--- a/src/common/util.h
+++ b/src/common/util.h
@@ -535,6 +535,10 @@ STATIC int format_helper_exit_status(unsigned char child_state,
 
 #endif
 
+#ifdef TOR_UNIT_TESTS
+int size_mul_check__(const size_t x, const size_t y);
+#endif
+
 #define ARRAY_LENGTH(x) ((sizeof(x)) / sizeof(x[0]))
 
 #endif