add configuration for canaries

2018-09-07 00:35:08 -04:00 · 2018-09-07 00:35:08 -04:00 · fc2473e7ee
parent 96c538d90f
commit fc2473e7ee
2 changed files with 2 additions and 1 deletions
--- a/config.h
+++ b/config.h
@ -5,5 +5,6 @@
 #define WRITE_AFTER_FREE_CHECK true
 #define SLOT_RANDOMIZE true
 #define ZERO_ON_FREE true
+#define SLAB_CANARY true

 #endif
--- a/malloc.c
+++ b/malloc.c
@ -23,7 +23,7 @@ static_assert(sizeof(void *) == 8, "64-bit only");
 static_assert(!WRITE_AFTER_FREE_CHECK || ZERO_ON_FREE, "WRITE_AFTER_FREE_CHECK depends on ZERO_ON_FREE");

 // either sizeof(uint64_t) or 0
-static const size_t canary_size = sizeof(uint64_t);
+static const size_t canary_size = SLAB_CANARY ? sizeof(uint64_t) : 0;

 #define CACHELINE_SIZE 64