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/*
* 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);
}
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