minix/test/test75.c

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/* Test 75 - getrusage functionality test.
*/
#include <sys/resource.h>
#include <sys/time.h>
#include <stdio.h>
#include <assert.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include "common.h"
#define CHECK_ZERO_FIELD(rusage, field) \
if (rusage.field != 0) \
em(1, #field " must be zero");
#define CHECK_NOT_ZERO_FIELD(rusage, field) \
if (rusage.field == 0) \
em(1, #field " can't be zero");
#define CHECK_EQUAL_FIELD(rusage1, rusage2, field) \
if (rusage1.field != rusage2.field) \
em(1, #field " of " #rusage1 " doesn't equal to " \
#field " of " #rusage2);
static void
spin(void)
{
struct timeval start_time;
struct timeval end_time;
unsigned int loop = 0;
if (gettimeofday(&start_time, NULL) == -1) {
e(1);
exit(1);
}
end_time = start_time;
do {
if ((++loop % 3000000000) == 0) {
if (gettimeofday(&end_time, NULL) == -1) {
e(1);
exit(1);
}
}
} while (start_time.tv_sec + 10 > end_time.tv_sec);
}
int
main(int argc, char *argv[])
{
struct rusage r_usage1;
struct rusage r_usage2;
struct rusage r_usage3;
pid_t child;
int status = 0;
start(75);
if ((getrusage(RUSAGE_SELF + 1, &r_usage1) != -1 || errno != EINVAL) ||
(getrusage(RUSAGE_CHILDREN - 1, &r_usage1) != -1 ||
errno != EINVAL) || (getrusage(RUSAGE_SELF, NULL) != -1 ||
errno != EFAULT)) {
e(1);
exit(1);
}
spin();
if (getrusage(RUSAGE_SELF, &r_usage1) != 0) {
e(1);
exit(1);
}
CHECK_NOT_ZERO_FIELD(r_usage1, ru_utime.tv_sec);
CHECK_NOT_ZERO_FIELD(r_usage1, ru_maxrss);
CHECK_NOT_ZERO_FIELD(r_usage1, ru_ixrss);
CHECK_NOT_ZERO_FIELD(r_usage1, ru_idrss);
CHECK_NOT_ZERO_FIELD(r_usage1, ru_isrss);
if (getrusage(RUSAGE_CHILDREN, &r_usage2) != 0) {
e(1);
exit(1);
}
CHECK_NOT_ZERO_FIELD(r_usage2, ru_maxrss);
CHECK_NOT_ZERO_FIELD(r_usage2, ru_ixrss);
CHECK_NOT_ZERO_FIELD(r_usage2, ru_idrss);
CHECK_NOT_ZERO_FIELD(r_usage2, ru_isrss);
CHECK_EQUAL_FIELD(r_usage1, r_usage2, ru_ixrss);
CHECK_EQUAL_FIELD(r_usage1, r_usage2, ru_idrss);
CHECK_EQUAL_FIELD(r_usage1, r_usage2, ru_isrss);
if ((child = fork()) == 0) {
/*
* We cannot do this part of the test in the parent, since
* start() calls system() which spawns a child process.
*/
if (getrusage(RUSAGE_CHILDREN, &r_usage1) != 0) {
e(1);
exit(1);
}
CHECK_ZERO_FIELD(r_usage1, ru_utime.tv_sec);
CHECK_ZERO_FIELD(r_usage1, ru_utime.tv_usec);
spin();
exit(0);
} else {
if (child != waitpid(child, &status, 0)) {
e(1);
exit(1);
}
if (WEXITSTATUS(status) != 0) {
e(1);
exit(1);
}
if (getrusage(RUSAGE_CHILDREN, &r_usage3) != 0) {
e(1);
exit(1);
}
CHECK_NOT_ZERO_FIELD(r_usage3, ru_utime.tv_sec);
CHECK_NOT_ZERO_FIELD(r_usage3, ru_maxrss);
CHECK_NOT_ZERO_FIELD(r_usage3, ru_ixrss);
CHECK_NOT_ZERO_FIELD(r_usage3, ru_idrss);
CHECK_NOT_ZERO_FIELD(r_usage3, ru_isrss);
CHECK_EQUAL_FIELD(r_usage1, r_usage3, ru_ixrss);
CHECK_EQUAL_FIELD(r_usage1, r_usage3, ru_idrss);
CHECK_EQUAL_FIELD(r_usage1, r_usage3, ru_isrss);
}
quit();
return 0;
}