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/* Area: ffi_call
Purpose: Tests if ffi_call reads data beyond end.
Limitations: needs mmap.
PR: 887
Originator: Mikulas Patocka <mikulas@twibright.com> */
/* { dg-do run } */
#include "ffitest.h"
#ifdef __linux__
#include <sys/mman.h>
#include <unistd.h>
static int ABI_ATTR fn(unsigned char a, unsigned short b, unsigned int c, unsigned long d)
{
return (int)(a + b + c + d);
}
#endif
int main(void)
{
#ifdef __linux__
ffi_cif cif;
ffi_type *args[MAX_ARGS];
void *values[MAX_ARGS];
ffi_arg rint;
char *m;
int ps;
args[0] = &ffi_type_uchar;
args[1] = &ffi_type_ushort;
args[2] = &ffi_type_uint;
args[3] = &ffi_type_ulong;
CHECK(ffi_prep_cif(&cif, ABI_NUM, 4, &ffi_type_sint, args) == FFI_OK);
ps = getpagesize();
m = mmap(NULL, ps * 3, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
CHECK(m != MAP_FAILED);
CHECK(mprotect(m, ps, PROT_NONE) == 0);
CHECK(mprotect(m + ps * 2, ps, PROT_NONE) == 0);
values[0] = m + ps * 2 - sizeof(unsigned char);
values[1] = m + ps * 2 - sizeof(unsigned short);
values[2] = m + ps * 2 - sizeof(unsigned int);
values[3] = m + ps * 2 - sizeof(unsigned long);
ffi_call(&cif, FFI_FN(fn), &rint, values);
CHECK((int)rint == 0);
values[0] = m + ps;
values[1] = m + ps;
values[2] = m + ps;
values[3] = m + ps;
ffi_call(&cif, FFI_FN(fn), &rint, values);
CHECK((int)rint == 0);
#endif
exit(0);
}
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