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 u16 __tsan_unaligned_read2(const uu16 *addr) {
  40   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, false, false);
  41   return *addr;
  42 }
  43
  44 u32 __tsan_unaligned_read4(const uu32 *addr) {
  45   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 4, false, false);
  46   return *addr;
  47 }
  48
  49 u64 __tsan_unaligned_read8(const uu64 *addr) {
  50   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 8, false, false);
  51   return *addr;
  52 }
  53
  54 void __tsan_unaligned_write2(uu16 *addr, u16 v) {
  55   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, true, false);
  56   *addr = v;
  57 }
  58
  59 void __tsan_unaligned_write4(uu32 *addr, u32 v) {
  60   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 4, true, false);
  61   *addr = v;
  62 }
  63
  64 void __tsan_unaligned_write8(uu64 *addr, u64 v) {
  65   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 8, true, false);
  66   *addr = v;
  67 }
  68
  69 extern "C" {
  70 SANITIZER_INTERFACE_ATTRIBUTE
  71 uint16_t __sanitizer_unaligned_load16(void *addr)
  72     ALIAS("__tsan_unaligned_read2");
  73 SANITIZER_INTERFACE_ATTRIBUTE
  74 uint32_t __sanitizer_unaligned_load32(void *addr)
  75     ALIAS("__tsan_unaligned_read4");
  76 SANITIZER_INTERFACE_ATTRIBUTE
  77 uint64_t __sanitizer_unaligned_load64(void *addr)
  78     ALIAS("__tsan_unaligned_read8");
  79 SANITIZER_INTERFACE_ATTRIBUTE
  80 void __sanitizer_unaligned_store16(void *addr, uint16_t v)
  81     ALIAS("__tsan_unaligned_write2");
  82 SANITIZER_INTERFACE_ATTRIBUTE
  83 void __sanitizer_unaligned_store32(void *addr, uint32_t v)
  84     ALIAS("__tsan_unaligned_write4");
  85 SANITIZER_INTERFACE_ATTRIBUTE
  86 void __sanitizer_unaligned_store64(void *addr, uint64_t v)
  87     ALIAS("__tsan_unaligned_write8");
  88 }
  89
  90 void __tsan_acquire(void *addr) {
  91   Acquire(cur_thread(), CALLERPC, (uptr)addr);
  92 }
  93
  94 void __tsan_release(void *addr) {
  95   Release(cur_thread(), CALLERPC, (uptr)addr);
  96 }