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_read16(void *addr) {
  30   MemoryRead(cur_thread(), CALLERPC, (uptr)addr, kSizeLog8);
  31   MemoryRead(cur_thread(), CALLERPC, (uptr)addr + 8, kSizeLog8);
  32 }
  33
  34 void __tsan_write16(void *addr) {
  35   MemoryWrite(cur_thread(), CALLERPC, (uptr)addr, kSizeLog8);
  36   MemoryWrite(cur_thread(), CALLERPC, (uptr)addr + 8, kSizeLog8);
  37 }
  38
  39 void __tsan_read16_pc(void *addr, void *pc) {
  40   MemoryRead(cur_thread(), (uptr)pc, (uptr)addr, kSizeLog8);
  41   MemoryRead(cur_thread(), (uptr)pc, (uptr)addr + 8, kSizeLog8);
  42 }
  43
  44 void __tsan_write16_pc(void *addr, void *pc) {
  45   MemoryWrite(cur_thread(), (uptr)pc, (uptr)addr, kSizeLog8);
  46   MemoryWrite(cur_thread(), (uptr)pc, (uptr)addr + 8, kSizeLog8);
  47 }
  48
  49 // __tsan_unaligned_read/write calls are emitted by compiler.
  50
  51 void __tsan_unaligned_read2(const void *addr) {
  52   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, false, false);
  53 }
  54
  55 void __tsan_unaligned_read4(const void *addr) {
  56   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 4, false, false);
  57 }
  58
  59 void __tsan_unaligned_read8(const void *addr) {
  60   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 8, false, false);
  61 }
  62
  63 void __tsan_unaligned_read16(const void *addr) {
  64   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 16, false, false);
  65 }
  66
  67 void __tsan_unaligned_write2(void *addr) {
  68   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, true, false);
  69 }
  70
  71 void __tsan_unaligned_write4(void *addr) {
  72   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 4, true, false);
  73 }
  74
  75 void __tsan_unaligned_write8(void *addr) {
  76   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 8, true, false);
  77 }
  78
  79 void __tsan_unaligned_write16(void *addr) {
  80   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 16, true, false);
  81 }
  82
  83 // __sanitizer_unaligned_load/store are for user instrumentation.
  84
  85 extern "C" {
  86 SANITIZER_INTERFACE_ATTRIBUTE
  87 u16 __sanitizer_unaligned_load16(const uu16 *addr) {
  88   __tsan_unaligned_read2(addr);
  89   return *addr;
  90 }
  91
  92 SANITIZER_INTERFACE_ATTRIBUTE
  93 u32 __sanitizer_unaligned_load32(const uu32 *addr) {
  94   __tsan_unaligned_read4(addr);
  95   return *addr;
  96 }
  97
  98 SANITIZER_INTERFACE_ATTRIBUTE
  99 u64 __sanitizer_unaligned_load64(const uu64 *addr) {
 100   __tsan_unaligned_read8(addr);
 101   return *addr;
 102 }
 103
 104 SANITIZER_INTERFACE_ATTRIBUTE
 105 void __sanitizer_unaligned_store16(uu16 *addr, u16 v) {
 106   __tsan_unaligned_write2(addr);
 107   *addr = v;
 108 }
 109
 110 SANITIZER_INTERFACE_ATTRIBUTE
 111 void __sanitizer_unaligned_store32(uu32 *addr, u32 v) {
 112   __tsan_unaligned_write4(addr);
 113   *addr = v;
 114 }
 115
 116 SANITIZER_INTERFACE_ATTRIBUTE
 117 void __sanitizer_unaligned_store64(uu64 *addr, u64 v) {
 118   __tsan_unaligned_write8(addr);
 119   *addr = v;
 120 }
 121 }  // extern "C"
 122
 123 void __tsan_acquire(void *addr) {
 124   Acquire(cur_thread(), CALLERPC, (uptr)addr);
 125 }
 126
 127 void __tsan_release(void *addr) {
 128   Release(cur_thread(), CALLERPC, (uptr)addr);
 129 }