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-rw-r--r--lib/dfsan/dfsan_interceptors.cpp45
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diff --git a/lib/dfsan/dfsan_interceptors.cpp b/lib/dfsan/dfsan_interceptors.cpp
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+//===-- dfsan_interceptors.cpp --------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of DataFlowSanitizer.
+//
+// Interceptors for standard library functions.
+//===----------------------------------------------------------------------===//
+
+#include "dfsan/dfsan.h"
+#include "interception/interception.h"
+#include "sanitizer_common/sanitizer_common.h"
+
+using namespace __sanitizer;
+
+INTERCEPTOR(void *, mmap, void *addr, SIZE_T length, int prot, int flags,
+ int fd, OFF_T offset) {
+ void *res = REAL(mmap)(addr, length, prot, flags, fd, offset);
+ if (res != (void*)-1)
+ dfsan_set_label(0, res, RoundUpTo(length, GetPageSize()));
+ return res;
+}
+
+INTERCEPTOR(void *, mmap64, void *addr, SIZE_T length, int prot, int flags,
+ int fd, OFF64_T offset) {
+ void *res = REAL(mmap64)(addr, length, prot, flags, fd, offset);
+ if (res != (void*)-1)
+ dfsan_set_label(0, res, RoundUpTo(length, GetPageSize()));
+ return res;
+}
+
+namespace __dfsan {
+void InitializeInterceptors() {
+ static int inited = 0;
+ CHECK_EQ(inited, 0);
+
+ INTERCEPT_FUNCTION(mmap);
+ INTERCEPT_FUNCTION(mmap64);
+ inited = 1;
+}
+} // namespace __dfsan