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#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <assert.h>
#include "pixman-private.h" /* For 'inline' definition */
#define ARRAY_LENGTH(A) ((int) (sizeof (A) / sizeof ((A) [0])))
/* A primitive pseudorandom number generator,
* taken from POSIX.1-2001 example
*/
extern uint32_t prng_seed;
#ifdef USE_OPENMP
#pragma omp threadprivate(prng_seed)
#endif
static inline uint32_t
prng_rand (void)
{
prng_seed = prng_seed * 1103515245 + 12345;
return ((uint32_t)(prng_seed / 65536) % 32768);
}
static inline void
prng_srand (uint32_t seed)
{
prng_seed = seed;
}
static inline uint32_t
prng_rand_n (int max)
{
return prng_rand () % max;
}
static inline uint32_t
prng_rand_N (int max)
{
uint32_t lo = prng_rand ();
uint32_t hi = prng_rand () << 15;
return (lo | hi) % max;
}
static inline uint32_t
prng_rand_u32 (void)
{
/* This uses the 10/11 most significant bits from the 3 lcg results
* (and mixes them with the low from the adjacent one).
*/
uint32_t lo = prng_rand() >> -(32 - 15 - 11 * 2);
uint32_t mid = prng_rand() << (32 - 15 - 11 * 1);
uint32_t hi = prng_rand() << (32 - 15 - 11 * 0);
return (hi ^ mid ^ lo);
}
/* CRC 32 computation
*/
uint32_t
compute_crc32 (uint32_t in_crc32,
const void *buf,
size_t buf_len);
uint32_t
compute_crc32_for_image (uint32_t in_crc32,
pixman_image_t *image);
/* Returns TRUE if running on a little endian system
*/
static force_inline pixman_bool_t
is_little_endian (void)
{
unsigned long endian_check_var = 1;
return *(unsigned char *)&endian_check_var == 1;
}
/* perform endian conversion of pixel data
*/
void
image_endian_swap (pixman_image_t *img);
/* Allocate memory that is bounded by protected pages,
* so that out-of-bounds access will cause segfaults
*/
void *
fence_malloc (int64_t len);
void
fence_free (void *data);
/* Generate n_bytes random bytes in fence_malloced memory */
uint8_t *
make_random_bytes (int n_bytes);
/* Return current time in seconds */
double
gettime (void);
uint32_t
get_random_seed (void);
/* main body of the fuzzer test */
int
fuzzer_test_main (const char *test_name,
int default_number_of_iterations,
uint32_t expected_checksum,
uint32_t (*test_function)(int testnum, int verbose),
int argc,
const char *argv[]);
void
fail_after (int seconds, const char *msg);
/* If possible, enable traps for floating point exceptions */
void enable_divbyzero_exceptions(void);
/* Converts a8r8g8b8 pixels to pixels that
* - are not premultiplied,
* - are stored in this order in memory: R, G, B, A, regardless of
* the endianness of the computer.
* It is allowed for @src and @dst to point to the same memory buffer.
*/
void
a8r8g8b8_to_rgba_np (uint32_t *dst, uint32_t *src, int n_pixels);
pixman_bool_t
write_png (pixman_image_t *image, const char *filename);
/* A pair of macros which can help to detect corruption of
* floating point registers after a function call. This may
* happen if _mm_empty() call is forgotten in MMX/SSE2 fast
* path code, or ARM NEON assembly optimized function forgets
* to save/restore d8-d15 registers before use.
*/
#define FLOAT_REGS_CORRUPTION_DETECTOR_START() \
static volatile double frcd_volatile_constant1 = 123451; \
static volatile double frcd_volatile_constant2 = 123452; \
static volatile double frcd_volatile_constant3 = 123453; \
static volatile double frcd_volatile_constant4 = 123454; \
static volatile double frcd_volatile_constant5 = 123455; \
static volatile double frcd_volatile_constant6 = 123456; \
static volatile double frcd_volatile_constant7 = 123457; \
static volatile double frcd_volatile_constant8 = 123458; \
double frcd_canary_variable1 = frcd_volatile_constant1; \
double frcd_canary_variable2 = frcd_volatile_constant2; \
double frcd_canary_variable3 = frcd_volatile_constant3; \
double frcd_canary_variable4 = frcd_volatile_constant4; \
double frcd_canary_variable5 = frcd_volatile_constant5; \
double frcd_canary_variable6 = frcd_volatile_constant6; \
double frcd_canary_variable7 = frcd_volatile_constant7; \
double frcd_canary_variable8 = frcd_volatile_constant8;
#define FLOAT_REGS_CORRUPTION_DETECTOR_FINISH() \
assert (frcd_canary_variable1 == frcd_volatile_constant1); \
assert (frcd_canary_variable2 == frcd_volatile_constant2); \
assert (frcd_canary_variable3 == frcd_volatile_constant3); \
assert (frcd_canary_variable4 == frcd_volatile_constant4); \
assert (frcd_canary_variable5 == frcd_volatile_constant5); \
assert (frcd_canary_variable6 == frcd_volatile_constant6); \
assert (frcd_canary_variable7 == frcd_volatile_constant7); \
assert (frcd_canary_variable8 == frcd_volatile_constant8);
/* Try to get an aligned memory chunk */
void *
aligned_malloc (size_t align, size_t size);
double
convert_srgb_to_linear (double component);
double
convert_linear_to_srgb (double component);
void
initialize_palette (pixman_indexed_t *palette, uint32_t depth, int is_rgb);
typedef struct
{
double r, g, b, a;
} color_t;
void
round_color (pixman_format_code_t format, color_t *color);
typedef struct
{
pixman_format_code_t format;
uint32_t am, rm, gm, bm;
uint32_t as, rs, gs, bs;
uint32_t aw, rw, gw, bw;
} pixel_checker_t;
void
pixel_checker_init (pixel_checker_t *checker, pixman_format_code_t format);
void
pixel_checker_split_pixel (const pixel_checker_t *checker, uint32_t pixel,
int *a, int *r, int *g, int *b);
void
pixel_checker_get_max (const pixel_checker_t *checker, color_t *color,
int *a, int *r, int *g, int *b);
void
pixel_checker_get_min (const pixel_checker_t *checker, color_t *color,
int *a, int *r, int *g, int *b);
pixman_bool_t
pixel_checker_check (const pixel_checker_t *checker,
uint32_t pixel, color_t *color);
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