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#define TEST_MACROS
#include "tests.h"
#include <camellia/errno.h>
#include <camellia/execbuf.h>
#include <camellia/flags.h>
#include <camellia/syscalls.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static void run_forked(void (*fn)()) {
if (!fork()) {
fn();
exit(0);
} else {
/* successful tests must return 0
* TODO add a better fail msg */
if (_syscall_await() != 0) test_fail();
}
}
const char *tmpfilepath = "/tmp/.test_internal";
static void test_await(void) {
/* creates 16 child processes, each returning a different value. then checks
* if await() returns every value exactly once */
int ret;
int counts[16] = {0};
for (int i = 0; i < 16; i++)
if (!fork())
exit(i);
while ((ret = _syscall_await()) != ~0) {
assert(0 <= ret && ret < 16);
counts[ret]++;
}
for (int i = 0; i < 16; i++)
assert(counts[i] == 1);
}
static void test_faults(void) {
/* tests what happens when child processes fault.
* expected behavior: parent processes still manages to finish, and it can
* reap all its children */
int await_cnt = 0;
if (!fork()) { // invalid memory access
asm volatile("movb $69, 0" ::: "memory");
printf("this shouldn't happen");
exit(-1);
}
if (!fork()) { // #GP
asm volatile("hlt" ::: "memory");
printf("this shouldn't happen");
exit(-1);
}
while (_syscall_await() != ~0) await_cnt++;
assert(await_cnt == 2);
}
static void test_interrupted_fs(void) {
handle_t h;
if (_syscall_fork(FORK_NEWFS, &h)) { /* child */
// TODO make a similar test with all 0s passed to fs_wait
struct fs_wait_response res;
_syscall_fs_wait(NULL, 0, &res);
exit(0);
} else { /* parent */
_syscall_mount(h, "/", 1);
int ret = _syscall_open("/", 1, 0);
// the handler quits while handling that call - but this syscall should return anyways
exit(ret < 0 ? 0 : -1);
}
}
static void test_orphaned_fs(void) {
handle_t h;
if (_syscall_fork(FORK_NEWFS, &h)) { /* child */
exit(0);
} else { /* parent */
_syscall_mount(h, "/", 1);
int ret = _syscall_open("/", 1, 0);
// no handler will ever be available to handle this call - the syscall should instantly return
exit(ret < 0 ? 0 : -1);
}
}
static void test_memflag(void) {
void *page = (void*)0x77777000;
_syscall_memflag(page, 4096, MEMFLAG_PRESENT); // allocate page
memset(page, 77, 4096); // write to it
_syscall_memflag(page, 4096, 0); // free it
if (!fork()) {
memset(page, 11, 4096); // should segfault
exit(0);
} else {
assert(_syscall_await() != 0); // test if the process crashed
}
char *pages[4];
for (size_t i = 0; i < 4; i++) {
pages[i] = _syscall_memflag(NULL, 4096, MEMFLAG_FINDFREE);
printf("[test_memflag] findfree: 0x%x\n", pages[i]);
assert(pages[i] == _syscall_memflag(NULL, 4096, MEMFLAG_FINDFREE | MEMFLAG_PRESENT));
if (i > 0) assert(pages[i] != pages[i-1]);
*pages[i] = 0x77;
}
for (size_t i = 0; i < 4; i++)
_syscall_memflag(pages, 4096, MEMFLAG_PRESENT);
// TODO check if reclaims
}
static void test_dup(void) {
handle_t pipe[2];
handle_t h1, h2;
assert(_syscall_pipe(pipe, 0) >= 0);
if (!fork()) {
close(pipe[0]);
h1 = _syscall_dup(pipe[1], -1, 0);
assert(h1 >= 0);
assert(h1 != pipe[1]);
h2 = _syscall_dup(h1, -1, 0);
assert(h2 >= 0);
assert(h2 != pipe[1] && h2 != h1);
_syscall_write(pipe[1], "og", 2, 0);
_syscall_write(h1, "h1", 2, 0);
_syscall_write(h2, "h2", 2, 0);
close(pipe[1]);
_syscall_write(h1, "h1", 2, 0);
_syscall_write(h2, "h2", 2, 0);
assert(_syscall_dup(h1, pipe[1], 0) == pipe[1]);
assert(_syscall_dup(h2, pipe[1], 0) == pipe[1]);
assert(_syscall_dup(h1, pipe[1], 0) == pipe[1]);
assert(_syscall_dup(h2, pipe[1], 0) == pipe[1]);
close(h1);
close(h2);
assert(_syscall_dup(pipe[1], h2, 0) == h2);
_syscall_write(h2, "h2", 2, 0);
close(h2);
assert(_syscall_dup(pipe[1], h1, 0) == h1);
_syscall_write(h1, "h1", 2, 0);
close(h1);
exit(0);
} else {
char buf[16];
size_t count = 0;
close(pipe[1]);
while (_syscall_read(pipe[0], buf, sizeof buf, 0) >= 0)
count++;
assert(count == 7);
_syscall_await();
}
close(pipe[0]);
}
static void test_malloc(void) {
// not really a test
void *p1, *p2;
p1 = malloc(420);
printf("p1 = 0x%x\n", p1);
p2 = malloc(1024);
printf("p2 = 0x%x\n", p2);
free(p2);
p2 = malloc(256);
printf("p2 = 0x%x\n", p2);
free(p2);
p2 = malloc(4096);
printf("p2 = 0x%x\n", p2);
free(p2);
free(p1);
}
static void test_efault(void) {
const char *str = "o, 16 characters";
char str2[16];
char *invalid = (void*)0x1000;
handle_t h;
memcpy(str2, str, 16);
assert((h = _syscall_open(tmpfilepath, strlen(tmpfilepath), OPEN_CREATE)));
assert(_syscall_write(h, str, 16, 0) == 16);
assert(_syscall_write(h, str2, 16, 0) == 16);
assert(_syscall_write(h, invalid, 16, 0) == -EFAULT);
/* x64 canonical pointers */
assert(_syscall_write(h, (void*)((uintptr_t)str ^ 0x8000000000000000), 16, 0) == -EFAULT);
assert(_syscall_write(h, (void*)((uintptr_t)str ^ 0x1000000000000000), 16, 0) == -EFAULT);
assert(_syscall_write(h, (void*)((uintptr_t)str ^ 0x0100000000000000), 16, 0) == -EFAULT);
assert(_syscall_write(h, (void*)((uintptr_t)str ^ 0x0010000000000000), 16, 0) == -EFAULT);
assert(_syscall_write(h, (void*)((uintptr_t)str ^ 0x0001000000000000), 16, 0) == -EFAULT);
assert(_syscall_write(h, (void*)((uintptr_t)str ^ 0x0000800000000000), 16, 0) == -EFAULT);
assert(_syscall_write(h, (void*)((uintptr_t)str2 ^ 0x8000000000000000), 16, 0) == -EFAULT);
assert(_syscall_write(h, (void*)((uintptr_t)str2 ^ 0x1000000000000000), 16, 0) == -EFAULT);
assert(_syscall_write(h, (void*)((uintptr_t)str2 ^ 0x0100000000000000), 16, 0) == -EFAULT);
assert(_syscall_write(h, (void*)((uintptr_t)str2 ^ 0x0010000000000000), 16, 0) == -EFAULT);
assert(_syscall_write(h, (void*)((uintptr_t)str2 ^ 0x0001000000000000), 16, 0) == -EFAULT);
assert(_syscall_write(h, (void*)((uintptr_t)str2 ^ 0x0000800000000000), 16, 0) == -EFAULT);
assert(_syscall_write(h, str, 16, 0) == 16);
close(h);
}
static void test_execbuf(void) {
// not really a test, TODO
const char str1[] = "test_execbuf: string 1\n";
const char str2[] = "test_execbuf: and 2\n";
uint64_t buf[] = {
EXECBUF_SYSCALL, _SYSCALL_WRITE, 1, (uintptr_t)str1, sizeof(str1) - 1, -1,
EXECBUF_SYSCALL, _SYSCALL_WRITE, 1, (uintptr_t)str2, sizeof(str2) - 1, -1,
EXECBUF_SYSCALL, _SYSCALL_EXIT, 0, 0, 0, 0,
};
_syscall_execbuf(buf, sizeof buf);
test_fail();
}
static void test_misc(void) {
assert(_syscall(~0, 0, 0, 0, 0) < 0); /* try making an invalid syscall */
}
void test_all(void) {
run_forked(test_await);
run_forked(test_faults);
run_forked(test_interrupted_fs);
run_forked(test_orphaned_fs);
run_forked(test_memflag);
run_forked(test_dup);
run_forked(test_malloc);
run_forked(test_pipe);
run_forked(test_semaphore);
run_forked(test_efault);
run_forked(test_execbuf);
run_forked(test_misc);
}
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