1//===- Transforms/Instrumentation.h - Instrumentation passes ----*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file defines constructor functions for instrumentation passes.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_TRANSFORMS_INSTRUMENTATION_H
15#define LLVM_TRANSFORMS_INSTRUMENTATION_H
16
17#include "llvm/ADT/StringRef.h"
18
19#if defined(__GNUC__) && defined(__linux__) && !defined(ANDROID)
20inline void *getDFSanArgTLSPtrForJIT() {
21  extern __thread __attribute__((tls_model("initial-exec")))
22    void *__dfsan_arg_tls;
23  return (void *)&__dfsan_arg_tls;
24}
25
26inline void *getDFSanRetValTLSPtrForJIT() {
27  extern __thread __attribute__((tls_model("initial-exec")))
28    void *__dfsan_retval_tls;
29  return (void *)&__dfsan_retval_tls;
30}
31#endif
32
33namespace llvm {
34
35class ModulePass;
36class FunctionPass;
37
38// Insert GCOV profiling instrumentation
39struct GCOVOptions {
40  static GCOVOptions getDefault();
41
42  // Specify whether to emit .gcno files.
43  bool EmitNotes;
44
45  // Specify whether to modify the program to emit .gcda files when run.
46  bool EmitData;
47
48  // A four-byte version string. The meaning of a version string is described in
49  // gcc's gcov-io.h
50  char Version[4];
51
52  // Emit a "cfg checksum" that follows the "line number checksum" of a
53  // function. This affects both .gcno and .gcda files.
54  bool UseCfgChecksum;
55
56  // Add the 'noredzone' attribute to added runtime library calls.
57  bool NoRedZone;
58
59  // Emit the name of the function in the .gcda files. This is redundant, as
60  // the function identifier can be used to find the name from the .gcno file.
61  bool FunctionNamesInData;
62};
63ModulePass *createGCOVProfilerPass(const GCOVOptions &Options =
64                                   GCOVOptions::getDefault());
65
66// Insert AddressSanitizer (address sanity checking) instrumentation
67FunctionPass *createAddressSanitizerFunctionPass();
68ModulePass *createAddressSanitizerModulePass();
69
70// Insert MemorySanitizer instrumentation (detection of uninitialized reads)
71FunctionPass *createMemorySanitizerPass(int TrackOrigins = 0);
72
73// Insert ThreadSanitizer (race detection) instrumentation
74FunctionPass *createThreadSanitizerPass();
75
76// Insert DataFlowSanitizer (dynamic data flow analysis) instrumentation
77ModulePass *createDataFlowSanitizerPass(StringRef ABIListFile = StringRef(),
78                                        void *(*getArgTLS)() = nullptr,
79                                        void *(*getRetValTLS)() = nullptr);
80
81#if defined(__GNUC__) && defined(__linux__) && !defined(ANDROID)
82inline ModulePass *createDataFlowSanitizerPassForJIT(StringRef ABIListFile =
83                                                         StringRef()) {
84  return createDataFlowSanitizerPass(ABIListFile, getDFSanArgTLSPtrForJIT,
85                                     getDFSanRetValTLSPtrForJIT);
86}
87#endif
88
89// BoundsChecking - This pass instruments the code to perform run-time bounds
90// checking on loads, stores, and other memory intrinsics.
91FunctionPass *createBoundsCheckingPass();
92
93/// createDebugIRPass - Enable interactive stepping through LLVM IR in LLDB (or
94///                     GDB) and generate a file with the LLVM IR to be
95///                     displayed in the debugger.
96///
97/// Existing debug metadata is preserved (but may be modified) in order to allow
98/// accessing variables in the original source. The line table and file
99/// information is modified to correspond to the lines in the LLVM IR. If
100/// Filename and Directory are empty, a file name is generated based on existing
101/// debug information. If no debug information is available, a temporary file
102/// name is generated.
103///
104/// @param HideDebugIntrinsics  Omit debug intrinsics in emitted IR source file.
105/// @param HideDebugMetadata    Omit debug metadata in emitted IR source file.
106/// @param Directory            Embed this directory in the debug information.
107/// @param Filename             Embed this file name in the debug information.
108ModulePass *createDebugIRPass(bool HideDebugIntrinsics,
109                              bool HideDebugMetadata,
110                              StringRef Directory = StringRef(),
111                              StringRef Filename = StringRef());
112
113/// createDebugIRPass - Enable interactive stepping through LLVM IR in LLDB
114///                     (or GDB) with an existing IR file on disk. When creating
115///                     a DebugIR pass with this function, no source file is
116///                     output to disk and the existing one is unmodified. Debug
117///                     metadata in the Module is created/updated to point to
118///                     the existing textual IR file on disk.
119/// NOTE: If the IR file to be debugged is not on disk, use the version of this
120///       function with parameters in order to generate the file that will be
121///       seen by the debugger.
122ModulePass *createDebugIRPass();
123
124} // End llvm namespace
125
126#endif
127