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() { Initialize(cur_thread_init()); }
24
__tsan_flush_memory()25 void __tsan_flush_memory() {
26 FlushShadowMemory();
27 }
28
__tsan_read16(void * addr)29 void __tsan_read16(void *addr) {
30 uptr pc = CALLERPC;
31 ThreadState *thr = cur_thread();
32 MemoryAccess(thr, pc, (uptr)addr, 8, kAccessRead);
33 MemoryAccess(thr, pc, (uptr)addr + 8, 8, kAccessRead);
34 }
35
__tsan_write16(void * addr)36 void __tsan_write16(void *addr) {
37 uptr pc = CALLERPC;
38 ThreadState *thr = cur_thread();
39 MemoryAccess(thr, pc, (uptr)addr, 8, kAccessWrite);
40 MemoryAccess(thr, pc, (uptr)addr + 8, 8, kAccessWrite);
41 }
42
__tsan_read16_pc(void * addr,void * pc)43 void __tsan_read16_pc(void *addr, void *pc) {
44 uptr pc_no_pac = STRIP_PAC_PC(pc);
45 ThreadState *thr = cur_thread();
46 MemoryAccess(thr, pc_no_pac, (uptr)addr, 8, kAccessRead);
47 MemoryAccess(thr, pc_no_pac, (uptr)addr + 8, 8, kAccessRead);
48 }
49
__tsan_write16_pc(void * addr,void * pc)50 void __tsan_write16_pc(void *addr, void *pc) {
51 uptr pc_no_pac = STRIP_PAC_PC(pc);
52 ThreadState *thr = cur_thread();
53 MemoryAccess(thr, pc_no_pac, (uptr)addr, 8, kAccessWrite);
54 MemoryAccess(thr, pc_no_pac, (uptr)addr + 8, 8, kAccessWrite);
55 }
56
57 // __tsan_unaligned_read/write calls are emitted by compiler.
58
__tsan_unaligned_read16(const void * addr)59 void __tsan_unaligned_read16(const void *addr) {
60 uptr pc = CALLERPC;
61 ThreadState *thr = cur_thread();
62 UnalignedMemoryAccess(thr, pc, (uptr)addr, 8, kAccessRead);
63 UnalignedMemoryAccess(thr, pc, (uptr)addr + 8, 8, kAccessRead);
64 }
65
__tsan_unaligned_write16(void * addr)66 void __tsan_unaligned_write16(void *addr) {
67 uptr pc = CALLERPC;
68 ThreadState *thr = cur_thread();
69 UnalignedMemoryAccess(thr, pc, (uptr)addr, 8, kAccessWrite);
70 UnalignedMemoryAccess(thr, pc, (uptr)addr + 8, 8, kAccessWrite);
71 }
72
73 extern "C" {
74 SANITIZER_INTERFACE_ATTRIBUTE
__tsan_get_current_fiber()75 void *__tsan_get_current_fiber() {
76 return cur_thread();
77 }
78
79 SANITIZER_INTERFACE_ATTRIBUTE
__tsan_create_fiber(unsigned flags)80 void *__tsan_create_fiber(unsigned flags) {
81 return FiberCreate(cur_thread(), CALLERPC, flags);
82 }
83
84 SANITIZER_INTERFACE_ATTRIBUTE
__tsan_destroy_fiber(void * fiber)85 void __tsan_destroy_fiber(void *fiber) {
86 FiberDestroy(cur_thread(), CALLERPC, static_cast<ThreadState *>(fiber));
87 }
88
89 SANITIZER_INTERFACE_ATTRIBUTE
__tsan_switch_to_fiber(void * fiber,unsigned flags)90 void __tsan_switch_to_fiber(void *fiber, unsigned flags) {
91 FiberSwitch(cur_thread(), CALLERPC, static_cast<ThreadState *>(fiber), flags);
92 }
93
94 SANITIZER_INTERFACE_ATTRIBUTE
__tsan_set_fiber_name(void * fiber,const char * name)95 void __tsan_set_fiber_name(void *fiber, const char *name) {
96 ThreadSetName(static_cast<ThreadState *>(fiber), name);
97 }
98 } // extern "C"
99
__tsan_acquire(void * addr)100 void __tsan_acquire(void *addr) {
101 Acquire(cur_thread(), CALLERPC, (uptr)addr);
102 }
103
__tsan_release(void * addr)104 void __tsan_release(void *addr) {
105 Release(cur_thread(), CALLERPC, (uptr)addr);
106 }
107