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1#ifndef TSAN_INTERCEPTORS_H
2#define TSAN_INTERCEPTORS_H
3
4#include "sanitizer_common/sanitizer_stacktrace.h"
5#include "tsan_rtl.h"
6
7namespace __tsan {
8
9class ScopedInterceptor {
10 public:
11 ScopedInterceptor(ThreadState *thr, const char *fname, uptr pc);
12 ~ScopedInterceptor();
13 void DisableIgnores() {
14 if (UNLIKELY(ignoring_))
15 DisableIgnoresImpl();
16 }
17 void EnableIgnores() {
18 if (UNLIKELY(ignoring_))
19 EnableIgnoresImpl();
20 }
21
22 private:
23 ThreadState *const thr_;
24 bool in_ignored_lib_ = false;
25 bool in_blocking_func_ = false;
26 bool ignoring_ = false;
27
28 void DisableIgnoresImpl();
29 void EnableIgnoresImpl();
30};
31
32struct TsanInterceptorContext {
33 ThreadState *thr;
34 const uptr pc;
35};
36
37LibIgnore *libignore();
38
39#if !SANITIZER_GO
40inline bool in_symbolizer() {
41 return UNLIKELY(cur_thread_init()->in_symbolizer);
42}
43#endif
44
45inline bool MustIgnoreInterceptor(ThreadState *thr) {
46 return !thr->is_inited || thr->ignore_interceptors || thr->in_ignored_lib;
47}
48
49} // namespace __tsan
50
51#define SCOPED_INTERCEPTOR_RAW(func, ...) \
52 ThreadState *thr = cur_thread_init(); \
53 ScopedInterceptor si(thr, #func, GET_CALLER_PC()); \
54 UNUSED const uptr pc = GET_CURRENT_PC();
55
56#ifdef __powerpc64__
57// Debugging of crashes on powerpc after commit:
58// c80604f7a3 ("tsan: remove real func check from interceptors")
59// Somehow replacing if with DCHECK leads to strange failures in:
60// SanitizerCommon-tsan-powerpc64le-Linux :: Linux/ptrace.cpp
61// https://lab.llvm.org/buildbot/#/builders/105
62// https://lab.llvm.org/buildbot/#/builders/121
63// https://lab.llvm.org/buildbot/#/builders/57
64# define CHECK_REAL_FUNC(func) \
65 if (REAL(func) == 0) { \
66 Report("FATAL: ThreadSanitizer: failed to intercept %s\n", #func); \
67 Die(); \
68 }
69#else
70# define CHECK_REAL_FUNC(func) DCHECK(REAL(func))
71#endif
72
73#define SCOPED_TSAN_INTERCEPTOR(func, ...) \
74 SCOPED_INTERCEPTOR_RAW(func, __VA_ARGS__); \
75 CHECK_REAL_FUNC(func); \
76 if (MustIgnoreInterceptor(thr)) \
77 return REAL(func)(__VA_ARGS__);
78
79#define SCOPED_TSAN_INTERCEPTOR_USER_CALLBACK_START() \
80 si.DisableIgnores();
81
82#define SCOPED_TSAN_INTERCEPTOR_USER_CALLBACK_END() \
83 si.EnableIgnores();
84
85#define TSAN_INTERCEPTOR(ret, func, ...) INTERCEPTOR(ret, func, __VA_ARGS__)
86
87#if SANITIZER_FREEBSD
88# define TSAN_INTERCEPTOR_FREEBSD_ALIAS(ret, func, ...) \
89 TSAN_INTERCEPTOR(ret, _pthread_##func, __VA_ARGS__) \
90 ALIAS(WRAP(pthread_##func));
91#else
92# define TSAN_INTERCEPTOR_FREEBSD_ALIAS(ret, func, ...)
93#endif
94
95#if SANITIZER_NETBSD
96# define TSAN_INTERCEPTOR_NETBSD_ALIAS(ret, func, ...) \
97 TSAN_INTERCEPTOR(ret, __libc_##func, __VA_ARGS__) \
98 ALIAS(WRAP(pthread_##func));
99# define TSAN_INTERCEPTOR_NETBSD_ALIAS_THR(ret, func, ...) \
100 TSAN_INTERCEPTOR(ret, __libc_thr_##func, __VA_ARGS__) \
101 ALIAS(WRAP(pthread_##func));
102# define TSAN_INTERCEPTOR_NETBSD_ALIAS_THR2(ret, func, func2, ...) \
103 TSAN_INTERCEPTOR(ret, __libc_thr_##func, __VA_ARGS__) \
104 ALIAS(WRAP(pthread_##func2));
105#else
106# define TSAN_INTERCEPTOR_NETBSD_ALIAS(ret, func, ...)
107# define TSAN_INTERCEPTOR_NETBSD_ALIAS_THR(ret, func, ...)
108# define TSAN_INTERCEPTOR_NETBSD_ALIAS_THR2(ret, func, func2, ...)
109#endif
110
111#define COMMON_INTERCEPT_FUNCTION(name) INTERCEPT_FUNCTION(name)
112
113#define COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED \
114 (!cur_thread_init()->is_inited)
115
116#define COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, size) \
117 MemoryAccessRange(((TsanInterceptorContext *)ctx)->thr, \
118 ((TsanInterceptorContext *)ctx)->pc, (uptr)ptr, size, \
119 true)
120
121#define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) \
122 MemoryAccessRange(((TsanInterceptorContext *) ctx)->thr, \
123 ((TsanInterceptorContext *) ctx)->pc, (uptr) ptr, size, \
124 false)
125
126#define COMMON_INTERCEPTOR_ENTER(ctx, func, ...) \
127 SCOPED_TSAN_INTERCEPTOR(func, __VA_ARGS__); \
128 TsanInterceptorContext _ctx = {thr, pc}; \
129 ctx = (void *)&_ctx; \
130 (void)ctx;
131
132#endif // TSAN_INTERCEPTORS_H