1 //===-- dfsan.h -------------------------------------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file is a part of DataFlowSanitizer.
10 //
11 // Private DFSan header.
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef DFSAN_H
15 #define DFSAN_H
16 
17 #include "sanitizer_common/sanitizer_internal_defs.h"
18 #include "dfsan_platform.h"
19 
20 using __sanitizer::uptr;
21 using __sanitizer::u16;
22 
23 // Copy declarations from public sanitizer/dfsan_interface.h header here.
24 typedef u16 dfsan_label;
25 
26 struct dfsan_label_info {
27   dfsan_label l1;
28   dfsan_label l2;
29   const char *desc;
30   void *userdata;
31 };
32 
33 extern "C" {
34 void dfsan_add_label(dfsan_label label, void *addr, uptr size);
35 void dfsan_set_label(dfsan_label label, void *addr, uptr size);
36 dfsan_label dfsan_read_label(const void *addr, uptr size);
37 dfsan_label dfsan_union(dfsan_label l1, dfsan_label l2);
38 }  // extern "C"
39 
40 template <typename T>
41 void dfsan_set_label(dfsan_label label, T &data) {  // NOLINT
42   dfsan_set_label(label, (void *)&data, sizeof(T));
43 }
44 
45 namespace __dfsan {
46 
47 void InitializeInterceptors();
48 
49 inline dfsan_label *shadow_for(void *ptr) {
50   return (dfsan_label *) ((((uptr) ptr) & ShadowMask()) << 1);
51 }
52 
53 inline const dfsan_label *shadow_for(const void *ptr) {
54   return shadow_for(const_cast<void *>(ptr));
55 }
56 
57 struct Flags {
58 #define DFSAN_FLAG(Type, Name, DefaultValue, Description) Type Name;
59 #include "dfsan_flags.inc"
60 #undef DFSAN_FLAG
61 
62   void SetDefaults();
63 };
64 
65 extern Flags flags_data;
66 inline Flags &flags() {
67   return flags_data;
68 }
69 
70 }  // namespace __dfsan
71 
72 #endif  // DFSAN_H
73