1//===-- tsan_interface.cc -------------------------------------------------===//
2//
3// This file is distributed under the University of Illinois Open Source
4// License. See LICENSE.TXT for details.
5//
6//===----------------------------------------------------------------------===//
7//
8// This file is a part of ThreadSanitizer (TSan), a race detector.
9//
10//===----------------------------------------------------------------------===//
11
12#include "tsan_interface.h"
13#include "tsan_interface_ann.h"
14#include "tsan_rtl.h"
15#include "sanitizer_common/sanitizer_internal_defs.h"
16
17#define CALLERPC ((uptr)__builtin_return_address(0))
18
19using namespace __tsan;  // NOLINT
20
21#if !SANITIZER_NETBSD
22typedef u16 uint16_t;
23typedef u32 uint32_t;
24typedef u64 uint64_t;
25#endif
26
27void __tsan_init() {
28  Initialize(cur_thread());
29}
30
31void __tsan_flush_memory() {
32  FlushShadowMemory();
33}
34
35void __tsan_read16(void *addr) {
36  MemoryRead(cur_thread(), CALLERPC, (uptr)addr, kSizeLog8);
37  MemoryRead(cur_thread(), CALLERPC, (uptr)addr + 8, kSizeLog8);
38}
39
40void __tsan_write16(void *addr) {
41  MemoryWrite(cur_thread(), CALLERPC, (uptr)addr, kSizeLog8);
42  MemoryWrite(cur_thread(), CALLERPC, (uptr)addr + 8, kSizeLog8);
43}
44
45void __tsan_read16_pc(void *addr, void *pc) {
46  MemoryRead(cur_thread(), (uptr)pc, (uptr)addr, kSizeLog8);
47  MemoryRead(cur_thread(), (uptr)pc, (uptr)addr + 8, kSizeLog8);
48}
49
50void __tsan_write16_pc(void *addr, void *pc) {
51  MemoryWrite(cur_thread(), (uptr)pc, (uptr)addr, kSizeLog8);
52  MemoryWrite(cur_thread(), (uptr)pc, (uptr)addr + 8, kSizeLog8);
53}
54
55// __tsan_unaligned_read/write calls are emitted by compiler.
56
57void __tsan_unaligned_read2(const void *addr) {
58  UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, false, false);
59}
60
61void __tsan_unaligned_read4(const void *addr) {
62  UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 4, false, false);
63}
64
65void __tsan_unaligned_read8(const void *addr) {
66  UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 8, false, false);
67}
68
69void __tsan_unaligned_read16(const void *addr) {
70  UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 16, false, false);
71}
72
73void __tsan_unaligned_write2(void *addr) {
74  UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, true, false);
75}
76
77void __tsan_unaligned_write4(void *addr) {
78  UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 4, true, false);
79}
80
81void __tsan_unaligned_write8(void *addr) {
82  UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 8, true, false);
83}
84
85void __tsan_unaligned_write16(void *addr) {
86  UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 16, true, false);
87}
88
89// __sanitizer_unaligned_load/store are for user instrumentation.
90
91extern "C" {
92SANITIZER_INTERFACE_ATTRIBUTE
93u16 __sanitizer_unaligned_load16(const uu16 *addr) {
94  __tsan_unaligned_read2(addr);
95  return *addr;
96}
97
98SANITIZER_INTERFACE_ATTRIBUTE
99u32 __sanitizer_unaligned_load32(const uu32 *addr) {
100  __tsan_unaligned_read4(addr);
101  return *addr;
102}
103
104SANITIZER_INTERFACE_ATTRIBUTE
105u64 __sanitizer_unaligned_load64(const uu64 *addr) {
106  __tsan_unaligned_read8(addr);
107  return *addr;
108}
109
110SANITIZER_INTERFACE_ATTRIBUTE
111void __sanitizer_unaligned_store16(uu16 *addr, u16 v) {
112  __tsan_unaligned_write2(addr);
113  *addr = v;
114}
115
116SANITIZER_INTERFACE_ATTRIBUTE
117void __sanitizer_unaligned_store32(uu32 *addr, u32 v) {
118  __tsan_unaligned_write4(addr);
119  *addr = v;
120}
121
122SANITIZER_INTERFACE_ATTRIBUTE
123void __sanitizer_unaligned_store64(uu64 *addr, u64 v) {
124  __tsan_unaligned_write8(addr);
125  *addr = v;
126}
127}  // extern "C"
128
129void __tsan_acquire(void *addr) {
130  Acquire(cur_thread(), CALLERPC, (uptr)addr);
131}
132
133void __tsan_release(void *addr) {
134  Release(cur_thread(), CALLERPC, (uptr)addr);
135}
136