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https://salsa.debian.org/xorg-team/lib/pixman
synced 2025-09-02 21:33:55 +00:00
cab3261c0d
Impending benchmark code will need a function to get current time in seconds, and this patch introduces such routine. We try to use the POSIX gettimeofday() function when available, and fall back to clock() when not.
121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
#include <stdlib.h>
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#include <config.h>
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#include <assert.h>
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#include "pixman-private.h" /* For 'inline' definition */
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/* A primitive pseudorandom number generator,
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* taken from POSIX.1-2001 example
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*/
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extern uint32_t lcg_seed;
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#ifdef USE_OPENMP
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#pragma omp threadprivate(lcg_seed)
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#endif
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static inline uint32_t
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lcg_rand (void)
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{
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lcg_seed = lcg_seed * 1103515245 + 12345;
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return ((uint32_t)(lcg_seed / 65536) % 32768);
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}
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static inline void
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lcg_srand (uint32_t seed)
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{
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lcg_seed = seed;
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}
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static inline uint32_t
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lcg_rand_n (int max)
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{
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return lcg_rand () % max;
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}
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static inline uint32_t
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lcg_rand_N (int max)
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{
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uint32_t lo = lcg_rand ();
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uint32_t hi = lcg_rand () << 15;
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return (lo | hi) % max;
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}
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/* CRC 32 computation
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*/
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uint32_t
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compute_crc32 (uint32_t in_crc32,
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const void *buf,
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size_t buf_len);
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/* perform endian conversion of pixel data
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*/
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void
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image_endian_swap (pixman_image_t *img, int bpp);
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/* Allocate memory that is bounded by protected pages,
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* so that out-of-bounds access will cause segfaults
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*/
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void *
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fence_malloc (uint32_t len);
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void
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fence_free (void *data);
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/* Generate n_bytes random bytes in fence_malloced memory */
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uint8_t *
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make_random_bytes (int n_bytes);
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/* Return current time in seconds */
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double
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gettime (void);
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/* main body of the fuzzer test */
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int
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fuzzer_test_main (const char *test_name,
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int default_number_of_iterations,
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uint32_t expected_checksum,
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uint32_t (*test_function)(int testnum, int verbose),
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int argc,
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const char *argv[]);
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void
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fail_after (int seconds, const char *msg);
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/* A pair of macros which can help to detect corruption of
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* floating point registers after a function call. This may
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* happen if _mm_empty() call is forgotten in MMX/SSE2 fast
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* path code, or ARM NEON assembly optimized function forgets
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* to save/restore d8-d15 registers before use.
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*/
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#define FLOAT_REGS_CORRUPTION_DETECTOR_START() \
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static volatile double frcd_volatile_constant1 = 123451; \
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static volatile double frcd_volatile_constant2 = 123452; \
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static volatile double frcd_volatile_constant3 = 123453; \
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static volatile double frcd_volatile_constant4 = 123454; \
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static volatile double frcd_volatile_constant5 = 123455; \
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static volatile double frcd_volatile_constant6 = 123456; \
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static volatile double frcd_volatile_constant7 = 123457; \
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static volatile double frcd_volatile_constant8 = 123458; \
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double frcd_canary_variable1 = frcd_volatile_constant1; \
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double frcd_canary_variable2 = frcd_volatile_constant2; \
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double frcd_canary_variable3 = frcd_volatile_constant3; \
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double frcd_canary_variable4 = frcd_volatile_constant4; \
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double frcd_canary_variable5 = frcd_volatile_constant5; \
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double frcd_canary_variable6 = frcd_volatile_constant6; \
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double frcd_canary_variable7 = frcd_volatile_constant7; \
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double frcd_canary_variable8 = frcd_volatile_constant8;
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#define FLOAT_REGS_CORRUPTION_DETECTOR_FINISH() \
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assert (frcd_canary_variable1 == frcd_volatile_constant1); \
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assert (frcd_canary_variable2 == frcd_volatile_constant2); \
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assert (frcd_canary_variable3 == frcd_volatile_constant3); \
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assert (frcd_canary_variable4 == frcd_volatile_constant4); \
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assert (frcd_canary_variable5 == frcd_volatile_constant5); \
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assert (frcd_canary_variable6 == frcd_volatile_constant6); \
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assert (frcd_canary_variable7 == frcd_volatile_constant7); \
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assert (frcd_canary_variable8 == frcd_volatile_constant8);
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/* Try to get an aligned memory chunk */
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void *
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aligned_malloc (size_t align, size_t size);
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