Security-57031.1.35.tar.gz

[apple/security.git] / Security / libsecurity_cryptkit / lib / falloc.c

diff --git a/Security/libsecurity_cryptkit/lib/falloc.c b/Security/libsecurity_cryptkit/lib/falloc.c
new file mode 100644 (file)
index 0000000..8a41af7
--- /dev/null
+++ b/Security/libsecurity_cryptkit/lib/falloc.c
@@ -0,0 +1,109 @@
+/* Copyright (c) 1998,2011,2014 Apple Inc.  All Rights Reserved.
+ *
+ * NOTICE: USE OF THE MATERIALS ACCOMPANYING THIS NOTICE IS SUBJECT
+ * TO THE TERMS OF THE SIGNED "FAST ELLIPTIC ENCRYPTION (FEE) REFERENCE
+ * SOURCE CODE EVALUATION AGREEMENT" BETWEEN APPLE, INC. AND THE
+ * ORIGINAL LICENSEE THAT OBTAINED THESE MATERIALS FROM APPLE,
+ * INC.  ANY USE OF THESE MATERIALS NOT PERMITTED BY SUCH AGREEMENT WILL
+ * EXPOSE YOU TO LIABILITY.
+ ***************************************************************************
+ *
+ * falloc.c - FEE malloc routines
+ *
+ * Revision History
+ * ----------------
+ *  28 May 98 at Apple
+ *     Added Mac-specific allocators from temp memory
+ *  20 Aug 96 at NeXT
+ *     Created.
+ */
+
+#include "platform.h"
+#include "falloc.h"
+#include <stdlib.h>
+
+/* watchpoint emulator */
+#define FALLOC_WATCH   0
+#if            FALLOC_WATCH
+#include <stdio.h>
+/* set these with debugger */
+void *mallocWatchAddrs;
+void *freeWatchAddrs;
+#endif
+
+/* if NULL, use our own */
+static mallocExternFcn *mallocExt = NULL;
+static freeExternFcn *freeExt = NULL;
+static reallocExternFcn *reallocExt = NULL;
+
+void fallocRegister(mallocExternFcn *mallocExtern,
+       freeExternFcn *freeExtern,
+       reallocExternFcn *reallocExtern)
+{
+       mallocExt = mallocExtern;
+       freeExt = freeExtern;
+       reallocExt = reallocExtern;
+}
+
+/*
+ * All this can be optimized and tailored to specific platforms, of course...
+ */
+
+void *fmalloc(unsigned size)
+{
+       void *rtn;
+       if(mallocExt != NULL) {
+               rtn = (mallocExt)(size);
+       }
+       else {
+               rtn = malloc(size);
+       }
+       #if             FALLOC_WATCH
+       if(rtn == mallocWatchAddrs) {
+               printf("====fmalloc watchpoint (0x%x) hit\n",
+                       (unsigned)mallocWatchAddrs);
+       }
+       #endif
+       return rtn;
+}
+
+void *fmallocWithData(const void *origData,
+       unsigned origDataLen)
+{
+       void *rtn = fmalloc(origDataLen);
+
+       bcopy(origData, rtn, origDataLen);
+       return rtn;
+}
+
+void ffree(void *data)
+{
+       #if             FALLOC_WATCH
+       if(data == freeWatchAddrs) {
+               printf("====ffree watchpoint (0x%x) hit\n",
+                       (unsigned)freeWatchAddrs);
+       }
+       #endif
+       if(freeExt != NULL) {
+               (freeExt)(data);
+       }
+       else {
+               free(data);
+       }
+}
+
+void *frealloc(void *oldPtr, unsigned newSize)
+{
+       #if             FALLOC_WATCH
+       if(oldPtr == freeWatchAddrs) {
+               printf("====frealloc watchpoint (0x%x) hit\n",
+                       (unsigned)freeWatchAddrs);
+       }
+       #endif
+       if(reallocExt != NULL) {
+               return (reallocExt)(oldPtr, newSize);
+       }
+       else {
+               return realloc(oldPtr, newSize);
+       }
+}