原始版本

RT_Thread/examples/libc/memory.c

@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-11-17     Bernard      first version
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <finsh.h>
+#include <sys/errno.h>
+
+static int errors = 0;
+static void merror(const char *msg)
+{
+    ++errors;
+    printf("Error: %s\n", msg);
+}
+
+int libc_mem(void)
+{
+    void *p;
+    int save;
+
+    errno = 0;
+
+    p = malloc(-1);
+    save = errno;
+
+    if (p != NULL)
+        merror("malloc (-1) succeeded.");
+
+    if (p == NULL && save != ENOMEM)
+        merror("errno is not set correctly");
+
+    p = malloc(10);
+    if (p == NULL)
+        merror("malloc (10) failed.");
+
+    /* realloc (p, 0) == free (p).  */
+    p = realloc(p, 0);
+    if (p != NULL)
+        merror("realloc (p, 0) failed.");
+
+    p = malloc(0);
+    if (p == NULL)
+    {
+        printf("malloc(0) returns NULL\n");
+    }
+
+    p = realloc(p, 0);
+    if (p != NULL)
+        merror("realloc (p, 0) failed.");
+
+    return errors != 0;
+}
+FINSH_FUNCTION_EXPORT(libc_mem, memory test for libc);