1//===-- tsan_interface.cc -------------------------------------------------===//
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 is a part of ThreadSanitizer (TSan), a race detector.
11//
12//===----------------------------------------------------------------------===//
13
14#include "tsan_interface.h"
15#include "tsan_interface_ann.h"
16#include "tsan_rtl.h"
17#include "sanitizer_common/sanitizer_internal_defs.h"
18
19#define CALLERPC ((uptr)__builtin_return_address(0))
20
21using namespace __tsan;  // NOLINT
22
23typedef u16 uint16_t;
24typedef u32 uint32_t;
25typedef u64 uint64_t;
26
27void __tsan_init() {
28  Initialize(cur_thread());
29}
30
31void __tsan_read16(void *addr) {
32  MemoryRead(cur_thread(), CALLERPC, (uptr)addr, kSizeLog8);
33  MemoryRead(cur_thread(), CALLERPC, (uptr)addr + 8, kSizeLog8);
34}
35
36void __tsan_write16(void *addr) {
37  MemoryWrite(cur_thread(), CALLERPC, (uptr)addr, kSizeLog8);
38  MemoryWrite(cur_thread(), CALLERPC, (uptr)addr + 8, kSizeLog8);
39}
40
41u16 __tsan_unaligned_read2(const uu16 *addr) {
42  UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, false, false);
43  return *addr;
44}
45
46u32 __tsan_unaligned_read4(const uu32 *addr) {
47  UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 4, false, false);
48  return *addr;
49}
50
51u64 __tsan_unaligned_read8(const uu64 *addr) {
52  UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 8, false, false);
53  return *addr;
54}
55
56void __tsan_unaligned_write2(uu16 *addr, u16 v) {
57  UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, true, false);
58  *addr = v;
59}
60
61void __tsan_unaligned_write4(uu32 *addr, u32 v) {
62  UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 4, true, false);
63  *addr = v;
64}
65
66void __tsan_unaligned_write8(uu64 *addr, u64 v) {
67  UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 8, true, false);
68  *addr = v;
69}
70
71extern "C" {
72SANITIZER_INTERFACE_ATTRIBUTE
73uint16_t __sanitizer_unaligned_load16(void *addr)
74    ALIAS("__tsan_unaligned_read2");
75SANITIZER_INTERFACE_ATTRIBUTE
76uint32_t __sanitizer_unaligned_load32(void *addr)
77    ALIAS("__tsan_unaligned_read4");
78SANITIZER_INTERFACE_ATTRIBUTE
79uint64_t __sanitizer_unaligned_load64(void *addr)
80    ALIAS("__tsan_unaligned_read8");
81SANITIZER_INTERFACE_ATTRIBUTE
82void __sanitizer_unaligned_store16(void *addr, uint16_t v)
83    ALIAS("__tsan_unaligned_write2");
84SANITIZER_INTERFACE_ATTRIBUTE
85void __sanitizer_unaligned_store32(void *addr, uint32_t v)
86    ALIAS("__tsan_unaligned_write4");
87SANITIZER_INTERFACE_ATTRIBUTE
88void __sanitizer_unaligned_store64(void *addr, uint64_t v)
89    ALIAS("__tsan_unaligned_write8");
90}
91
92void __tsan_acquire(void *addr) {
93  Acquire(cur_thread(), CALLERPC, (uptr)addr);
94}
95
96void __tsan_release(void *addr) {
97  Release(cur_thread(), CALLERPC, (uptr)addr);
98}
99