jehanne/qa/lib/c/privates.c

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/*
* This file is part of the UCB release of Plan 9. It is subject to the license
* terms in the LICENSE file found in the top-level directory of this
* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
* part of the UCB release of Plan 9, including this file, may be copied,
* modified, propagated, or distributed except according to the terms contained
* in the LICENSE file.
*/
#include <u.h>
#include <lib9.h>
extern void **_privates;
extern int _nprivates;
void
main(void)
{
unsigned char buf[512];
uint64_t i, fail = 0;
/* _nprivates is a private things of libc, over which we should
* never do assumptions. So we are breaking the interface here:
* let's just do it once, to read how many privates we have at
* the beginning. But note that nowhere is written that
* _nprivate is kept constant!
*/
int nprivatesAtStart = _nprivates;
if (_privates == nil) {
fprint(2, "_privates is nil\n");
fail++;
}
if (nprivatesAtStart == 0) {
fprint(2, "_nprivates is 0\n");
fail++;
}
for (i = 0; i < nprivatesAtStart; i++) {
_privates[i] = (void *)(0x77665544332210 + i);
}
memset(buf, 0, sizeof buf);
for (i = 0; i < nprivatesAtStart; i++) {
if (_privates[i] != (void *)(0x77665544332210 + i)){
fprint(2, "_privates[%d] = %p\n", i, _privates[i]);
fail++;
}
}
void*** p = malloc(nprivatesAtStart*sizeof(void**));
for (i = 0; i < nprivatesAtStart; i++) {
p[i] = privalloc();
if(p[i] == nil){
fail++;
fprint(2, "privalloc[%d] nil: %p\n", i, p[i]);
}
}
p[i] = privalloc();
if(p[i] != nil){
fail++;
fprint(2, "privalloc[_nprivates (%d)] not nil: %p\n", i, p[i]);
}
for (i = 0; i < nprivatesAtStart; i++) {
*(p[i]) = (void*)i;
}
for (i = 0; i < nprivatesAtStart; i++) {
if(*(p[i]) != (void*)i){
fprint(2, "p[%d] != %d\n", i, i);
fail++;
}
}
if (fail > 0) {
print("FAIL (%d times)\n", fail);
exits("FAIL");
}
print("PASS\n");
exits("PASS");
}