Import compiler-rt release_34 branch r197381.vendor/compiler-rt/compiler-rt-r197381

https://llvm.org/svn/llvm-project/compiler-rt/branches/release_34@197381

1 files changed, 44 insertions, 0 deletions

diff --git a/lib/dfsan/dfsan_interceptors.cc b/lib/dfsan/dfsan_interceptors.cc
new file mode 100644
index 000000000000..8b7d64e25a39
--- /dev/null
+++ b/lib/dfsan/dfsan_interceptors.cc
@@ -0,0 +1,44 @@
+//===-- dfsan_interceptors.cc ---------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// 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"
+
+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