1 //===-- tsan_interface.cpp ------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file is a part of ThreadSanitizer (TSan), a race detector.
10 //
11 //===----------------------------------------------------------------------===//
12
13 #include "tsan_interface.h"
14 #include "tsan_interface_ann.h"
15 #include "tsan_rtl.h"
16 #include "sanitizer_common/sanitizer_internal_defs.h"
17 #include "sanitizer_common/sanitizer_ptrauth.h"
18
19 #define CALLERPC ((uptr)__builtin_return_address(0))
20
21 using namespace __tsan;
22
__tsan_init()23 void __tsan_init() {
24 cur_thread_init();
25 Initialize(cur_thread());
26 }
27
__tsan_flush_memory()28 void __tsan_flush_memory() {
29 FlushShadowMemory();
30 }
31
__tsan_read16(void * addr)32 void __tsan_read16(void *addr) {
33 MemoryRead(cur_thread(), CALLERPC, (uptr)addr, kSizeLog8);
34 MemoryRead(cur_thread(), CALLERPC, (uptr)addr + 8, kSizeLog8);
35 }
36
__tsan_write16(void * addr)37 void __tsan_write16(void *addr) {
38 MemoryWrite(cur_thread(), CALLERPC, (uptr)addr, kSizeLog8);
39 MemoryWrite(cur_thread(), CALLERPC, (uptr)addr + 8, kSizeLog8);
40 }
41
__tsan_read16_pc(void * addr,void * pc)42 void __tsan_read16_pc(void *addr, void *pc) {
43 MemoryRead(cur_thread(), STRIP_PAC_PC(pc), (uptr)addr, kSizeLog8);
44 MemoryRead(cur_thread(), STRIP_PAC_PC(pc), (uptr)addr + 8, kSizeLog8);
45 }
46
__tsan_write16_pc(void * addr,void * pc)47 void __tsan_write16_pc(void *addr, void *pc) {
48 MemoryWrite(cur_thread(), STRIP_PAC_PC(pc), (uptr)addr, kSizeLog8);
49 MemoryWrite(cur_thread(), STRIP_PAC_PC(pc), (uptr)addr + 8, kSizeLog8);
50 }
51
52 // __tsan_unaligned_read/write calls are emitted by compiler.
53
__tsan_unaligned_read2(const void * addr)54 void __tsan_unaligned_read2(const void *addr) {
55 UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, false, false);
56 }
57
__tsan_unaligned_read4(const void * addr)58 void __tsan_unaligned_read4(const void *addr) {
59 UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 4, false, false);
60 }
61
__tsan_unaligned_read8(const void * addr)62 void __tsan_unaligned_read8(const void *addr) {
63 UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 8, false, false);
64 }
65
__tsan_unaligned_read16(const void * addr)66 void __tsan_unaligned_read16(const void *addr) {
67 UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 16, false, false);
68 }
69
__tsan_unaligned_write2(void * addr)70 void __tsan_unaligned_write2(void *addr) {
71 UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, true, false);
72 }
73
__tsan_unaligned_write4(void * addr)74 void __tsan_unaligned_write4(void *addr) {
75 UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 4, true, false);
76 }
77
__tsan_unaligned_write8(void * addr)78 void __tsan_unaligned_write8(void *addr) {
79 UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 8, true, false);
80 }
81
__tsan_unaligned_write16(void * addr)82 void __tsan_unaligned_write16(void *addr) {
83 UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 16, true, false);
84 }
85
86 // __sanitizer_unaligned_load/store are for user instrumentation.
87
88 extern "C" {
89 SANITIZER_INTERFACE_ATTRIBUTE
__sanitizer_unaligned_load16(const uu16 * addr)90 u16 __sanitizer_unaligned_load16(const uu16 *addr) {
91 __tsan_unaligned_read2(addr);
92 return *addr;
93 }
94
95 SANITIZER_INTERFACE_ATTRIBUTE
__sanitizer_unaligned_load32(const uu32 * addr)96 u32 __sanitizer_unaligned_load32(const uu32 *addr) {
97 __tsan_unaligned_read4(addr);
98 return *addr;
99 }
100
101 SANITIZER_INTERFACE_ATTRIBUTE
__sanitizer_unaligned_load64(const uu64 * addr)102 u64 __sanitizer_unaligned_load64(const uu64 *addr) {
103 __tsan_unaligned_read8(addr);
104 return *addr;
105 }
106
107 SANITIZER_INTERFACE_ATTRIBUTE
__sanitizer_unaligned_store16(uu16 * addr,u16 v)108 void __sanitizer_unaligned_store16(uu16 *addr, u16 v) {
109 __tsan_unaligned_write2(addr);
110 *addr = v;
111 }
112
113 SANITIZER_INTERFACE_ATTRIBUTE
__sanitizer_unaligned_store32(uu32 * addr,u32 v)114 void __sanitizer_unaligned_store32(uu32 *addr, u32 v) {
115 __tsan_unaligned_write4(addr);
116 *addr = v;
117 }
118
119 SANITIZER_INTERFACE_ATTRIBUTE
__sanitizer_unaligned_store64(uu64 * addr,u64 v)120 void __sanitizer_unaligned_store64(uu64 *addr, u64 v) {
121 __tsan_unaligned_write8(addr);
122 *addr = v;
123 }
124
125 SANITIZER_INTERFACE_ATTRIBUTE
__tsan_get_current_fiber()126 void *__tsan_get_current_fiber() {
127 return cur_thread();
128 }
129
130 SANITIZER_INTERFACE_ATTRIBUTE
__tsan_create_fiber(unsigned flags)131 void *__tsan_create_fiber(unsigned flags) {
132 return FiberCreate(cur_thread(), CALLERPC, flags);
133 }
134
135 SANITIZER_INTERFACE_ATTRIBUTE
__tsan_destroy_fiber(void * fiber)136 void __tsan_destroy_fiber(void *fiber) {
137 FiberDestroy(cur_thread(), CALLERPC, static_cast<ThreadState *>(fiber));
138 }
139
140 SANITIZER_INTERFACE_ATTRIBUTE
__tsan_switch_to_fiber(void * fiber,unsigned flags)141 void __tsan_switch_to_fiber(void *fiber, unsigned flags) {
142 FiberSwitch(cur_thread(), CALLERPC, static_cast<ThreadState *>(fiber), flags);
143 }
144
145 SANITIZER_INTERFACE_ATTRIBUTE
__tsan_set_fiber_name(void * fiber,const char * name)146 void __tsan_set_fiber_name(void *fiber, const char *name) {
147 ThreadSetName(static_cast<ThreadState *>(fiber), name);
148 }
149 } // extern "C"
150
__tsan_acquire(void * addr)151 void __tsan_acquire(void *addr) {
152 Acquire(cur_thread(), CALLERPC, (uptr)addr);
153 }
154
__tsan_release(void * addr)155 void __tsan_release(void *addr) {
156 Release(cur_thread(), CALLERPC, (uptr)addr);
157 }
158