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Diffstat (limited to 'src/pixman/test/utils.h')
| -rw-r--r-- | src/pixman/test/utils.h | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/src/pixman/test/utils.h b/src/pixman/test/utils.h new file mode 100644 index 0000000..ebb14d9 --- /dev/null +++ b/src/pixman/test/utils.h @@ -0,0 +1,247 @@ +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <assert.h> +#include "pixman-private.h" /* For 'inline' definition */ +#include "utils-prng.h" + +#if defined(_MSC_VER) +#define snprintf _snprintf +#define strcasecmp _stricmp +#endif + +#define ARRAY_LENGTH(A) ((int) (sizeof (A) / sizeof ((A) [0]))) + +/* A primitive pseudorandom number generator, + * taken from POSIX.1-2001 example + */ + +extern prng_t prng_state_data; +extern prng_t *prng_state; +#ifdef USE_OPENMP +#pragma omp threadprivate(prng_state_data) +#pragma omp threadprivate(prng_state) +#endif + +static inline uint32_t +prng_rand (void) +{ + return prng_rand_r (prng_state); +} + +static inline void +prng_srand (uint32_t seed) +{ + if (!prng_state) + { + /* Without setting a seed, PRNG does not work properly (is just + * returning zeros). So we only initialize the pointer here to + * make sure that 'prng_srand' is always called before any + * other 'prng_*' function. The wrongdoers violating this order + * will get a segfault. */ + prng_state = &prng_state_data; + } + prng_srand_r (prng_state, seed); +} + +static inline uint32_t +prng_rand_n (int max) +{ + return prng_rand () % max; +} + +static inline void +prng_randmemset (void *buffer, size_t size, prng_randmemset_flags_t flags) +{ + prng_randmemset_r (prng_state, buffer, size, flags); +} + +/* 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); + +/* Print the image in hexadecimal */ +void +print_image (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); + +void +draw_checkerboard (pixman_image_t *image, + int check_size, + uint32_t color1, uint32_t color2); + +/* 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); + +const char * +operator_name (pixman_op_t op); + +const char * +format_name (pixman_format_code_t format); + +typedef struct +{ + double r, g, b, a; +} color_t; + +void +do_composite (pixman_op_t op, + const color_t *src, + const color_t *mask, + const color_t *dst, + color_t *result, + pixman_bool_t component_alpha); + +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); + +void +pixel_checker_convert_pixel_to_color (const pixel_checker_t *checker, + uint32_t pixel, color_t *color); + +void +pixel_checker_get_masks (const pixel_checker_t *checker, + uint32_t *am, + uint32_t *rm, + uint32_t *gm, + uint32_t *bm); |
