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
19 using namespace __tsan; // NOLINT
20
21 typedef u16 uint16_t;
22 typedef u32 uint32_t;
23 typedef u64 uint64_t;
24
__tsan_init()25 void __tsan_init() {
26 Initialize(cur_thread());
27 }
28
__tsan_flush_memory()29 void __tsan_flush_memory() {
30 FlushShadowMemory();
31 }
32
__tsan_read16(void * addr)33 void __tsan_read16(void *addr) {
34 MemoryRead(cur_thread(), CALLERPC, (uptr)addr, kSizeLog8);
35 MemoryRead(cur_thread(), CALLERPC, (uptr)addr + 8, kSizeLog8);
36 }
37
__tsan_write16(void * addr)38 void __tsan_write16(void *addr) {
39 MemoryWrite(cur_thread(), CALLERPC, (uptr)addr, kSizeLog8);
40 MemoryWrite(cur_thread(), CALLERPC, (uptr)addr + 8, kSizeLog8);
41 }
42
__tsan_read16_pc(void * addr,void * pc)43 void __tsan_read16_pc(void *addr, void *pc) {
44 MemoryRead(cur_thread(), (uptr)pc, (uptr)addr, kSizeLog8);
45 MemoryRead(cur_thread(), (uptr)pc, (uptr)addr + 8, kSizeLog8);
46 }
47
__tsan_write16_pc(void * addr,void * pc)48 void __tsan_write16_pc(void *addr, void *pc) {
49 MemoryWrite(cur_thread(), (uptr)pc, (uptr)addr, kSizeLog8);
50 MemoryWrite(cur_thread(), (uptr)pc, (uptr)addr + 8, kSizeLog8);
51 }
52
53 // __tsan_unaligned_read/write calls are emitted by compiler.
54
__tsan_unaligned_read2(const void * addr)55 void __tsan_unaligned_read2(const void *addr) {
56 UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, false, false);
57 }
58
__tsan_unaligned_read4(const void * addr)59 void __tsan_unaligned_read4(const void *addr) {
60 UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 4, false, false);
61 }
62
__tsan_unaligned_read8(const void * addr)63 void __tsan_unaligned_read8(const void *addr) {
64 UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 8, false, false);
65 }
66
__tsan_unaligned_read16(const void * addr)67 void __tsan_unaligned_read16(const void *addr) {
68 UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 16, false, false);
69 }
70
__tsan_unaligned_write2(void * addr)71 void __tsan_unaligned_write2(void *addr) {
72 UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, true, false);
73 }
74
__tsan_unaligned_write4(void * addr)75 void __tsan_unaligned_write4(void *addr) {
76 UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 4, true, false);
77 }
78
__tsan_unaligned_write8(void * addr)79 void __tsan_unaligned_write8(void *addr) {
80 UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 8, true, false);
81 }
82
__tsan_unaligned_write16(void * addr)83 void __tsan_unaligned_write16(void *addr) {
84 UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 16, true, false);
85 }
86
87 // __sanitizer_unaligned_load/store are for user instrumentation.
88
89 extern "C" {
90 SANITIZER_INTERFACE_ATTRIBUTE
__sanitizer_unaligned_load16(const uu16 * addr)91 u16 __sanitizer_unaligned_load16(const uu16 *addr) {
92 __tsan_unaligned_read2(addr);
93 return *addr;
94 }
95
96 SANITIZER_INTERFACE_ATTRIBUTE
__sanitizer_unaligned_load32(const uu32 * addr)97 u32 __sanitizer_unaligned_load32(const uu32 *addr) {
98 __tsan_unaligned_read4(addr);
99 return *addr;
100 }
101
102 SANITIZER_INTERFACE_ATTRIBUTE
__sanitizer_unaligned_load64(const uu64 * addr)103 u64 __sanitizer_unaligned_load64(const uu64 *addr) {
104 __tsan_unaligned_read8(addr);
105 return *addr;
106 }
107
108 SANITIZER_INTERFACE_ATTRIBUTE
__sanitizer_unaligned_store16(uu16 * addr,u16 v)109 void __sanitizer_unaligned_store16(uu16 *addr, u16 v) {
110 __tsan_unaligned_write2(addr);
111 *addr = v;
112 }
113
114 SANITIZER_INTERFACE_ATTRIBUTE
__sanitizer_unaligned_store32(uu32 * addr,u32 v)115 void __sanitizer_unaligned_store32(uu32 *addr, u32 v) {
116 __tsan_unaligned_write4(addr);
117 *addr = v;
118 }
119
120 SANITIZER_INTERFACE_ATTRIBUTE
__sanitizer_unaligned_store64(uu64 * addr,u64 v)121 void __sanitizer_unaligned_store64(uu64 *addr, u64 v) {
122 __tsan_unaligned_write8(addr);
123 *addr = v;
124 }
125 } // extern "C"
126
__tsan_acquire(void * addr)127 void __tsan_acquire(void *addr) {
128 Acquire(cur_thread(), CALLERPC, (uptr)addr);
129 }
130
__tsan_release(void * addr)131 void __tsan_release(void *addr) {
132 Release(cur_thread(), CALLERPC, (uptr)addr);
133 }
134