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-rw-r--r--xmalloc.c118
1 files changed, 118 insertions, 0 deletions
diff --git a/xmalloc.c b/xmalloc.c
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+++ b/xmalloc.c
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+/* $OpenBSD: xmalloc.c,v 1.34 2017/05/31 09:15:42 deraadt Exp $ */
+/*
+ * Author: Tatu Ylonen <ylo@cs.hut.fi>
+ * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+ * All rights reserved
+ * Versions of malloc and friends that check their results, and never return
+ * failure (they call fatal if they encounter an error).
+ *
+ * As far as I am concerned, the code I have written for this software
+ * can be used freely for any purpose. Any derived versions of this
+ * software must be clearly marked as such, and if the derived work is
+ * incompatible with the protocol description in the RFC file, it must be
+ * called by a name other than "ssh" or "Secure Shell".
+ */
+
+#include "includes.h"
+
+#include <stdarg.h>
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "xmalloc.h"
+#include "log.h"
+
+void
+ssh_malloc_init(void)
+{
+#if defined(__OpenBSD__)
+ extern char *malloc_options;
+
+ malloc_options = "S";
+#endif /* __OpenBSD__ */
+}
+
+void *
+xmalloc(size_t size)
+{
+ void *ptr;
+
+ if (size == 0)
+ fatal("xmalloc: zero size");
+ ptr = malloc(size);
+ if (ptr == NULL)
+ fatal("xmalloc: out of memory (allocating %zu bytes)", size);
+ return ptr;
+}
+
+void *
+xcalloc(size_t nmemb, size_t size)
+{
+ void *ptr;
+
+ if (size == 0 || nmemb == 0)
+ fatal("xcalloc: zero size");
+ if (SIZE_MAX / nmemb < size)
+ fatal("xcalloc: nmemb * size > SIZE_MAX");
+ ptr = calloc(nmemb, size);
+ if (ptr == NULL)
+ fatal("xcalloc: out of memory (allocating %zu bytes)",
+ size * nmemb);
+ return ptr;
+}
+
+void *
+xreallocarray(void *ptr, size_t nmemb, size_t size)
+{
+ void *new_ptr;
+
+ new_ptr = reallocarray(ptr, nmemb, size);
+ if (new_ptr == NULL)
+ fatal("xreallocarray: out of memory (%zu elements of %zu bytes)",
+ nmemb, size);
+ return new_ptr;
+}
+
+void *
+xrecallocarray(void *ptr, size_t onmemb, size_t nmemb, size_t size)
+{
+ void *new_ptr;
+
+ new_ptr = recallocarray(ptr, onmemb, nmemb, size);
+ if (new_ptr == NULL)
+ fatal("xrecallocarray: out of memory (%zu elements of %zu bytes)",
+ nmemb, size);
+ return new_ptr;
+}
+
+char *
+xstrdup(const char *str)
+{
+ size_t len;
+ char *cp;
+
+ len = strlen(str) + 1;
+ cp = xmalloc(len);
+ strlcpy(cp, str, len);
+ return cp;
+}
+
+int
+xasprintf(char **ret, const char *fmt, ...)
+{
+ va_list ap;
+ int i;
+
+ va_start(ap, fmt);
+ i = vasprintf(ret, fmt, ap);
+ va_end(ap);
+
+ if (i < 0 || *ret == NULL)
+ fatal("xasprintf: could not allocate memory");
+
+ return (i);
+}