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author | Twinaphex | 2020-02-08 16:24:22 +0100 |
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committer | GitHub | 2020-02-08 16:24:22 +0100 |
commit | 0adc619b5a5705d16cc6caea64951776ababbb96 (patch) | |
tree | fbae9b1d18d04d8e7908aa1c3446782ebf6e8785 /deps/lightning/check/setcode.c | |
parent | 0204c39a68a1fd4bf667aa8ece5a769f2983b7d0 (diff) | |
parent | 6f1edc3c7fd1f7f58155107d0c99d0ac7d22443b (diff) | |
download | pcsx_rearmed-0adc619b5a5705d16cc6caea64951776ababbb96.tar.gz pcsx_rearmed-0adc619b5a5705d16cc6caea64951776ababbb96.tar.bz2 pcsx_rearmed-0adc619b5a5705d16cc6caea64951776ababbb96.zip |
Merge pull request #377 from pcercuei/libretro
Lightrec dynarec
Diffstat (limited to 'deps/lightning/check/setcode.c')
-rw-r--r-- | deps/lightning/check/setcode.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/deps/lightning/check/setcode.c b/deps/lightning/check/setcode.c new file mode 100644 index 0000000..0047f34 --- /dev/null +++ b/deps/lightning/check/setcode.c @@ -0,0 +1,89 @@ +/* + * Simple test of using an alternate buffer for the code. + */ + +#include <lightning.h> +#include <stdio.h> +#include <assert.h> +#include <sys/mman.h> +#if defined(__sgi) +# include <fcntl.h> +#endif + +#ifndef MAP_ANON +# define MAP_ANON MAP_ANONYMOUS +# ifndef MAP_ANONYMOUS +# define MAP_ANONYMOUS 0 +# endif +#endif + +#if !defined(__sgi) +#define mmap_fd -1 +#endif + +int +main(int argc, char *argv[]) +{ + jit_uint8_t *ptr; + jit_state_t *_jit; + jit_word_t length; +#if defined(__sgi) + int mmap_fd; +#endif + void (*function)(void); + +#if defined(__sgi) + mmap_fd = open("/dev/zero", O_RDWR); +#endif + + ptr = mmap(NULL, 1024 * 1024, + PROT_EXEC | PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANON, mmap_fd, 0); + assert(ptr != MAP_FAILED); +#if defined(__sgi) + close(mmap_fd); +#endif + + init_jit(argv[0]); + _jit = jit_new_state(); + + jit_prolog(); + jit_prepare(); + jit_pushargi((jit_word_t)"%s\n"); + jit_ellipsis(); + jit_pushargi((jit_word_t)"ok"); + jit_finishi(printf); + + /* call to jit_realize() is only required when using an alternate + * code buffer. Note that not using mmap'ed memory may not work + * on several ports and/or operating system versions */ + jit_realize(); + + length = 0; + if (jit_get_code(&length) != NULL) + abort(); + + if (length <= 4) + abort(); + + /* check that a too small buffer fails */ + jit_set_code(ptr, 4); + function = jit_emit(); + if (function != NULL) + abort(); + + /* and calling again with enough space works */ + jit_set_code(ptr, 1024 * 1024); + function = jit_emit(); + if (function == NULL) + abort(); + + jit_clear_state(); + (*function)(); + jit_destroy_state(); + finish_jit(); + + munmap(ptr, 1024 * 1024); + + return (0); +} |