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[fuzzer] Fuzz long range matching & new API

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This commit is contained in:
Nick Terrell
2017-09-14 14:48:08 -07:00
parent 9712d5ebe6
commit 39357c41cb
6 changed files with 209 additions and 95 deletions
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tests/fuzz/fuzz_helpers.h
+24 -13
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@@ -16,8 +16,10 @@
#include "fuzz.h"
#include "xxhash.h"
#include "zstd.h"
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef __cplusplus
extern "C" {
@@ -38,6 +40,8 @@ extern "C" {
__LINE__, FUZZ_QUOTE(cond), (msg)), \
abort()))
#define FUZZ_ASSERT(cond) FUZZ_ASSERT_MSG((cond), "");
#define FUZZ_ZASSERT(code) \
FUZZ_ASSERT_MSG(!ZSTD_isError(code), ZSTD_getErrorName(code))
#if defined(__GNUC__)
#define FUZZ_STATIC static __inline __attribute__((unused))
@@ -55,23 +59,30 @@ extern "C" {
* Consumes up to the first FUZZ_RNG_SEED_SIZE bytes of the input.
*/
FUZZ_STATIC uint32_t FUZZ_seed(uint8_t const **src, size_t* size) {
uint8_t const *data = *src;
size_t const toHash = MIN(FUZZ_RNG_SEED_SIZE, *size);
*size -= toHash;
*src += toHash;
return XXH32(data, toHash, 0);
uint8_t const *data = *src;
size_t const toHash = MIN(FUZZ_RNG_SEED_SIZE, *size);
*size -= toHash;
*src += toHash;
return XXH32(data, toHash, 0);
}
#define FUZZ_rotl32(x, r) (((x) << (r)) | ((x) >> (32 - (r))))
FUZZ_STATIC uint32_t FUZZ_rand(uint32_t *state) {
static const uint32_t prime1 = 2654435761U;
static const uint32_t prime2 = 2246822519U;
uint32_t rand32 = *state;
rand32 *= prime1;
rand32 += prime2;
rand32 = FUZZ_rotl32(rand32, 13);
*state = rand32;
return rand32 >> 5;
static const uint32_t prime1 = 2654435761U;
static const uint32_t prime2 = 2246822519U;
uint32_t rand32 = *state;
rand32 *= prime1;
rand32 += prime2;
rand32 = FUZZ_rotl32(rand32, 13);
*state = rand32;
return rand32 >> 5;
}
/* Returns a random numer in the range [min, max]. */
FUZZ_STATIC uint32_t FUZZ_rand32(uint32_t *state, uint32_t min, uint32_t max) {
uint32_t random = FUZZ_rand(state);
return min + (random % (max - min + 1));
}
#ifdef __cplusplus