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#include "user/user.h"
int strlen(const char *s)
{
int n = 0;
while (s[n])
n++;
return n;
}
void print(const char *s)
{
write(1, s, strlen(s));
}
void print_int(int n)
{
char buf[16];
int i = 0;
int neg = 0;
if (n == 0)
{
write(1, "0", 1);
return;
}
if (n < 0)
{
neg = 1;
n = -n;
}
while (n > 0)
{
buf[i++] = (n % 10) + '0';
n /= 10;
}
if (neg)
buf[i++] = '-';
while (i > 0)
write(1, &buf[--i], 1);
}
void print_hex(uint64 n)
{
char buf[16];
char digits[] = "0123456789ABCDEF";
write(1, "0x", 2);
if (n == 0)
{
write(1, "0", 1);
return;
}
int i = 0;
while (n > 0)
{
buf[i++] = digits[n % 16];
n /= 16;
}
while (i > 0)
write(1, &buf[--i], 1);
}
void test_syscalls()
{
print("\n=== [Test] Starting System Call Check ===\n");
print("[1/4] Checking getpid()... ");
int my_pid = getpid();
if (my_pid > 0)
{
print("PASS (PID=");
print_int(my_pid);
print(")\n");
}
else
{
print("FAIL (Invalid PID)\n");
}
print("[2/4] Checking sbrk() heap allocation... ");
char *p = sbrk(4096);
if (p == (char *)-1)
{
print("FAIL (sbrk returned error)\n");
}
else
{
p[0] = 'A';
p[4095] = 'Z';
if (p[0] == 'A' && p[4095] == 'Z')
{
print("PASS (Allocated at ");
print_hex((uint64)p);
print(")\n");
}
else
{
print("FAIL (Memory read/write check failed)\n");
}
}
print("[3/4] Checking fork() and wait()...\n");
int pid = fork();
if (pid < 0)
{
print(" FAIL: fork error\n");
}
else if (pid == 0)
{
int child_pid = getpid();
if (child_pid == my_pid)
{
print(" FAIL: Child has same PID as parent\n");
exit(1);
}
print(" [Child] I am alive. PID=");
print_int(child_pid);
print("\n");
print(" [Child] Exiting now.\n");
exit(0);
}
else
{
print(" [Parent] Forked child PID=");
print_int(pid);
print("\n");
print(" [Parent] Waiting for child...\n");
int waited_pid = wait(0);
if (waited_pid == pid)
{
print(" [Parent] Wait returned correct PID.\n");
print("PASS (Fork/Wait cycle)\n");
}
else
{
print("FAIL (Wait returned ");
print_int(waited_pid);
print(")\n");
}
}
print("[4/4] Checking write()... PASS (Self-evident)\n");
print("=== [Test] All Tests Finished ===\n");
}
int main()
{
print("\n[Lume Shell] Ready.\n");
print("Commands:\n");
print(" s: Run System Call Tests (fork, wait, mm)\n");
print(" t: Run Disk Driver Test (VirtIO)\n");
while (1)
{
char buf[16];
write(1, "$ ", 2);
int n = read(0, buf, sizeof(buf));
if (n <= 0)
continue;
if (buf[0] == 's')
{
test_syscalls();
}
else if (buf[0] == 't')
{
if (fork() == 0)
{
disk_test();
exit(0);
}
wait(0);
}
else if (buf[0] != '\n')
{
print("Unknown command.\n");
}
}
exit(0);
return 0;
}
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