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/*
* Tests for various context functions
*
* getcontext
* setcontext
* swapcontext
*/
#include <ucontext.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <unistd.h>
#include <assert.h>
#include "../../memcheck.h"
int main(void)
{
ucontext_t uc;
volatile int flag = 0;
if (-1 == getcontext(&uc)) {
perror("getcontext failed: ");
}
flag++;
if (flag == 1) {
if (-1 == setcontext(&uc)) {
perror("setcontext failed: ");
}
}
flag++;
if (flag == 3) {
ucontext_t uc2;
if (-1 == swapcontext(&uc2, &uc)) {
perror("swapcontext failed: ");
}
}
assert(flag == 5);
// error section
ucontext_t* ucp = malloc(sizeof(*ucp));
ucontext_t* ucp2 = malloc(sizeof(*ucp2));
(void)VALGRIND_MAKE_MEM_NOACCESS(ucp, sizeof(*ucp));
(void)VALGRIND_MAKE_MEM_NOACCESS(ucp2, sizeof(*ucp2));
flag = 0;
if (-1 == getcontext(ucp)) {
perror("getcontext failed: ");
}
flag++;
if (flag == 1) {
(void)VALGRIND_MAKE_MEM_NOACCESS(ucp, sizeof(*ucp));
if (-1 == setcontext(ucp)) {
perror("setcontext failed: ");
}
fprintf(stderr, "should never see setcontext return\n");
}
flag++;
if (flag == 3) {
(void)VALGRIND_MAKE_MEM_NOACCESS(ucp, sizeof(*ucp));
if (-1 == swapcontext(ucp2, ucp)) {
perror("swapcontext failed: ");
}
fprintf(stderr, "should never see swapcontest return\n");
}
assert(flag == 5);
free(ucp);
free(ucp2);
}
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