Kernel: Add a test for multi-region mprotect

Author: https://github.com/Hendiadyoin1 Commit: https://github.com/SerenityOS/serenity/commit/5a8c2201018 Pull-request: https://github.com/SerenityOS/serenity/pull/6064 Issue: https://github.com/SerenityOS/serenity/issues/177 Reviewed-by: https://github.com/ADKaster ✅
2021-05-08 11:08:50 +02:00 · 2021-05-08 11:08:50 +02:00 · 5a8c220101 · 2024-07-18 17:50:14 +09:00
commit 5a8c220101
parent ef425a02f7
1 changed files with 75 additions and 0 deletions
--- a/Tests/Kernel/mprotect-multi-region-mrotect.cpp
+++ b/Tests/Kernel/mprotect-multi-region-mrotect.cpp
@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2021, the SerenityOS developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <AK/Format.h>
+#include <AK/Types.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <unistd.h>
+
+int main()
+{
+    printf("Testing full unnmap\n");
+    auto* map1 = mmap(nullptr, 2 * PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, 0, 0);
+    if (map1 == MAP_FAILED) {
+        perror("mmap 1");
+        return 1;
+    }
+    auto* map2 = mmap((void*)((FlatPtr)map1 + 2 * PAGE_SIZE), 2 * PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, 0, 0);
+    if (map2 == MAP_FAILED) {
+        perror("mmap 2");
+        return 1;
+    }
+    auto* map3 = mmap((void*)((FlatPtr)map1 + 4 * PAGE_SIZE), 2 * PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, 0, 0);
+    if (map3 == MAP_FAILED) {
+        perror("mmap 3");
+        return 1;
+    }
+
+    // really allocating pages
+    memset(map1, 0x01, 6 * PAGE_SIZE);
+
+    int rc;
+
+    outln("Mprotect 3 ranges [2, 2 ,2]");
+    rc = mprotect(map1, 6 * PAGE_SIZE, PROT_READ);
+    if (rc) {
+        perror("mprotect full");
+        return 1;
+    }
+
+    outln("Mprotect 3 ranges [-1, 2 ,1-]");
+    rc = mprotect((void*)((FlatPtr)map1 + PAGE_SIZE), 4 * PAGE_SIZE, PROT_READ);
+    if (rc) {
+        perror("mprotect partial");
+        return 1;
+    }
+
+    outln("unmapping");
+    munmap(map2, 2 * PAGE_SIZE);
+
+    outln("Mprotect 2 ranges [2, -- ,2] -> Error");
+    rc = mprotect(map1, 6 * PAGE_SIZE, PROT_READ);
+    if (!rc) {
+        perror("mprotect full over missing succeded");
+        return 1;
+    }
+
+    outln("Mprotect 3 ranges [-1, -- ,1-] -> Error");
+    rc = mprotect((void*)((FlatPtr)map1 + PAGE_SIZE), 4 * PAGE_SIZE, PROT_READ);
+    if (!rc) {
+        perror("mprotect partial over missing succeeded");
+        return 1;
+    }
+
+    //cleanup
+    munmap(map1, 6 * PAGE_SIZE);
+
+    outln("PASS");
+    return 0;
+}