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configuration for guard region sizes

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This commit is contained in:
Daniel Micay 2018-10-06 15:17:55 -04:00
parent d18b05eaf4
commit 4ee12e64e0
2 changed files with 2 additions and 1 deletions
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1
config.h
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@ -8,5 +8,6 @@
#define SLOT_RANDOMIZE true #define SLOT_RANDOMIZE true
#define ZERO_ON_FREE true #define ZERO_ON_FREE true
#define SLAB_CANARY true #define SLAB_CANARY true
#define GUARD_SIZE_DIVISOR 2
#endif #endif

2
malloc.c
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@ -729,7 +729,7 @@ COLD __attribute__((constructor(101))) static void trigger_early_init(void) {
} }
static size_t get_guard_size(struct random_state *state, size_t size) { static size_t get_guard_size(struct random_state *state, size_t size) {
return (get_random_u64_uniform(state, size / PAGE_SIZE / 2) + 1) * PAGE_SIZE; return (get_random_u64_uniform(state, size / PAGE_SIZE / GUARD_SIZE_DIVISOR) + 1) * PAGE_SIZE;
} }
static void *allocate(size_t size) { static void *allocate(size_t size) {