libsanitizer/tsan/tsan_interface.cc

   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
  25 void __tsan_init() {
  26   Initialize(cur_thread());
  27 }
  28
  29 void __tsan_flush_memory() {
  30   FlushShadowMemory();
  31 }
  32
  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
  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
  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
  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
  55 void __tsan_unaligned_read2(const void *addr) {
  56   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, false, false);
  57 }
  58
  59 void __tsan_unaligned_read4(const void *addr) {
  60   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 4, false, false);
  61 }
  62
  63 void __tsan_unaligned_read8(const void *addr) {
  64   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 8, false, false);
  65 }
  66
  67 void __tsan_unaligned_read16(const void *addr) {
  68   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 16, false, false);
  69 }
  70
  71 void __tsan_unaligned_write2(void *addr) {
  72   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, true, false);
  73 }
  74
  75 void __tsan_unaligned_write4(void *addr) {
  76   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 4, true, false);
  77 }
  78
  79 void __tsan_unaligned_write8(void *addr) {
  80   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 8, true, false);
  81 }
  82
  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
  91 u16 __sanitizer_unaligned_load16(const uu16 *addr) {
  92   __tsan_unaligned_read2(addr);
  93   return *addr;
  94 }
  95
  96 SANITIZER_INTERFACE_ATTRIBUTE
  97 u32 __sanitizer_unaligned_load32(const uu32 *addr) {
  98   __tsan_unaligned_read4(addr);
  99   return *addr;
 100 }
 101
 102 SANITIZER_INTERFACE_ATTRIBUTE
 103 u64 __sanitizer_unaligned_load64(const uu64 *addr) {
 104   __tsan_unaligned_read8(addr);
 105   return *addr;
 106 }
 107
 108 SANITIZER_INTERFACE_ATTRIBUTE
 109 void __sanitizer_unaligned_store16(uu16 *addr, u16 v) {
 110   __tsan_unaligned_write2(addr);
 111   *addr = v;
 112 }
 113
 114 SANITIZER_INTERFACE_ATTRIBUTE
 115 void __sanitizer_unaligned_store32(uu32 *addr, u32 v) {
 116   __tsan_unaligned_write4(addr);
 117   *addr = v;
 118 }
 119
 120 SANITIZER_INTERFACE_ATTRIBUTE
 121 void __sanitizer_unaligned_store64(uu64 *addr, u64 v) {
 122   __tsan_unaligned_write8(addr);
 123   *addr = v;
 124 }
 125 }  // extern "C"
 126
 127 void __tsan_acquire(void *addr) {
 128   Acquire(cur_thread(), CALLERPC, (uptr)addr);
 129 }
 130
 131 void __tsan_release(void *addr) {
 132   Release(cur_thread(), CALLERPC, (uptr)addr);
 133 }