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test
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test9.c
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C/C++ Source or Header
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1990-07-23
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4KB
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270 lines
/* Test 9 setjmp with register variables. Author: Ceriel Jacobs */
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
#define MAX_ERROR 4
int whichtest;
int nerrors;
int errct;
int subtest = 1;
char *tmpa;
extern int errno;
main()
{
jmp_buf envm;
register int i;
int j;
printf("Test 9 ");
for (j = 0; j < 100; j++) {
test1();
test2();
test3();
test4();
test5();
test6();
}
if (nerrors) {
printf("%d errors detected\n", nerrors);
exit(nerrors);
}
i = 1;
if (setjmp(envm) == 0) {
i = 2;
longjmp(envm, 1);
} else {
if (i == 2) {
/* Correct */
} else if (i == 1) {
printf("WARNING: The setjmp/longjmp of this machine restore register variables\n\
to the value they had at the time of the \"setjmp\"\n");
} else {
printf("Aha, I just found one last error\n");
return 1;
}
}
printf("ok\n");
}
test1()
{
register p;
whichtest = 1;
p = 200;
garbage();
if (p != 200) e(1);
}
test2()
{
register p, q;
whichtest = 2;
p = 200;
q = 300;
garbage();
if (p != 200) e(1);
if (q != 300) e(2);
}
test3()
{
register p, q, r;
whichtest = 3;
p = 200;
q = 300;
r = 400;
garbage();
if (p != 200) e(1);
if (q != 300) e(2);
if (r != 400) e(3);
}
char buf[512];
test4()
{
register char *p;
whichtest = 4;
p = &buf[100];
garbage();
if (p != &buf[100]) e(1);
}
test5()
{
register char *p, *q;
whichtest = 5;
p = &buf[100];
q = &buf[200];
garbage();
if (p != &buf[100]) e(1);
if (q != &buf[200]) e(2);
}
test6()
{
register char *p, *q, *r;
whichtest = 6;
p = &buf[100];
q = &buf[200];
r = &buf[300];
garbage();
if (p != &buf[100]) e(1);
if (q != &buf[200]) e(2);
if (r != &buf[300]) e(3);
}
jmp_buf env;
/* return address of local variable.
This way we can check that the stack is not polluted.
*/
char *
addr()
{
char a;
return &a;
}
garbage()
{
register i, j, k;
register char *p, *q, *r;
char *a;
int t;
p = &buf[300];
q = &buf[400];
r = &buf[500];
i = 10;
j = 20;
k = 30;
switch (setjmp(env)) {
case 0:
a = addr();
longjmp(env, 1);
break;
case 1:
if (i != 10) e(11);
if (j != 20) e(12);
if (k != 30) e(13);
if (p != &buf[300]) e(14);
if (q != &buf[400]) e(15);
if (r != &buf[500]) e(16);
tmpa = addr();
if (a != tmpa) e(17);
level1();
break;
case 2:
if (i != 10) e(21);
if (j != 20) e(22);
if (k != 30) e(23);
if (p != &buf[300]) e(24);
if (q != &buf[400]) e(25);
if (r != &buf[500]) e(26);
tmpa = addr();
if (a != tmpa) e(27);
level2();
break;
case 3:
if (i != 10) e(31);
if (j != 20) e(32);
if (k != 30) e(33);
if (p != &buf[300]) e(34);
if (q != &buf[400]) e(35);
if (r != &buf[500]) e(36);
tmpa = addr();
if (a != tmpa) e(37);
hard();
case 4:
if (i != 10) e(41);
if (j != 20) e(42);
if (k != 30) e(43);
if (p != &buf[300]) e(44);
if (q != &buf[400]) e(45);
if (r != &buf[500]) e(46);
tmpa = addr();
if (a != tmpa) e(47);
return;
break;
default: e(100);
}
e(200);
}
level1()
{
register char *p;
register i;
i = 1000;
p = &buf[10];
i = 200;
p = &buf[20];
longjmp(env, 2);
}
level2()
{
register char *p;
register i;
i = 0200;
p = &buf[2];
*p = i;
dolev();
}
dolev()
{
register char *p;
register i;
i = 010;
p = &buf[3];
*p = i;
longjmp(env, 3);
}
catch()
{
longjmp(env, 4);
}
hard()
{
register char *p;
signal(SIGHUP, catch);
for (p = buf; p <= &buf[511]; p++) *p = 025;
kill(getpid(), SIGHUP);
}
e(n)
int n;
{
int err_num = errno; /* save errno in case printf clobbers it */
printf("Subtest %d, error %d errno=%d ", subtest, n, errno);
errno = err_num; /* restore errno, just in case */
perror("");
if (errct++ > MAX_ERROR) {
printf("Too many errors; test aborted\n");
exit(1);
}
}