Home | History | Annotate | Download | only in rtl 
      1 //===-- tsan_interface.cc -------------------------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 //
     10 // This file is a part of ThreadSanitizer (TSan), a race detector.
     11 //
     12 //===----------------------------------------------------------------------===//
     13 
     14 #include "tsan_interface.h"
     15 #include "tsan_interface_ann.h"
     16 #include "tsan_rtl.h"
     17 #include "sanitizer_common/sanitizer_internal_defs.h"
     18 
     19 #define CALLERPC ((uptr)__builtin_return_address(0))
     20 
     21 using namespace __tsan;  // NOLINT
     22 
     23 typedef u16 uint16_t;
     24 typedef u32 uint32_t;
     25 typedef u64 uint64_t;
     26 
     27 void __tsan_init() {
     28   Initialize(cur_thread());
     29 }
     30 
     31 void __tsan_read16(void *addr) {
     32   MemoryRead(cur_thread(), CALLERPC, (uptr)addr, kSizeLog8);
     33   MemoryRead(cur_thread(), CALLERPC, (uptr)addr + 8, kSizeLog8);
     34 }
     35 
     36 void __tsan_write16(void *addr) {
     37   MemoryWrite(cur_thread(), CALLERPC, (uptr)addr, kSizeLog8);
     38   MemoryWrite(cur_thread(), CALLERPC, (uptr)addr + 8, kSizeLog8);
     39 }
     40 
     41 void __tsan_read16_pc(void *addr, void *pc) {
     42   MemoryRead(cur_thread(), (uptr)pc, (uptr)addr, kSizeLog8);
     43   MemoryRead(cur_thread(), (uptr)pc, (uptr)addr + 8, kSizeLog8);
     44 }
     45 
     46 void __tsan_write16_pc(void *addr, void *pc) {
     47   MemoryWrite(cur_thread(), (uptr)pc, (uptr)addr, kSizeLog8);
     48   MemoryWrite(cur_thread(), (uptr)pc, (uptr)addr + 8, kSizeLog8);
     49 }
     50 
     51 // __tsan_unaligned_read/write calls are emitted by compiler.
     52 
     53 void __tsan_unaligned_read2(const void *addr) {
     54   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, false, false);
     55 }
     56 
     57 void __tsan_unaligned_read4(const void *addr) {
     58   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 4, false, false);
     59 }
     60 
     61 void __tsan_unaligned_read8(const void *addr) {
     62   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 8, false, false);
     63 }
     64 
     65 void __tsan_unaligned_read16(const void *addr) {
     66   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 16, false, false);
     67 }
     68 
     69 void __tsan_unaligned_write2(void *addr) {
     70   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, true, false);
     71 }
     72 
     73 void __tsan_unaligned_write4(void *addr) {
     74   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 4, true, false);
     75 }
     76 
     77 void __tsan_unaligned_write8(void *addr) {
     78   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 8, true, false);
     79 }
     80 
     81 void __tsan_unaligned_write16(void *addr) {
     82   UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 16, true, false);
     83 }
     84 
     85 // __sanitizer_unaligned_load/store are for user instrumentation.
     86 
     87 extern "C" {
     88 SANITIZER_INTERFACE_ATTRIBUTE
     89 u16 __sanitizer_unaligned_load16(const uu16 *addr) {
     90   __tsan_unaligned_read2(addr);
     91   return *addr;
     92 }
     93 
     94 SANITIZER_INTERFACE_ATTRIBUTE
     95 u32 __sanitizer_unaligned_load32(const uu32 *addr) {
     96   __tsan_unaligned_read4(addr);
     97   return *addr;
     98 }
     99 
    100 SANITIZER_INTERFACE_ATTRIBUTE
    101 u64 __sanitizer_unaligned_load64(const uu64 *addr) {
    102   __tsan_unaligned_read8(addr);
    103   return *addr;
    104 }
    105 
    106 SANITIZER_INTERFACE_ATTRIBUTE
    107 void __sanitizer_unaligned_store16(uu16 *addr, u16 v) {
    108   __tsan_unaligned_write2(addr);
    109   *addr = v;
    110 }
    111 
    112 SANITIZER_INTERFACE_ATTRIBUTE
    113 void __sanitizer_unaligned_store32(uu32 *addr, u32 v) {
    114   __tsan_unaligned_write4(addr);
    115   *addr = v;
    116 }
    117 
    118 SANITIZER_INTERFACE_ATTRIBUTE
    119 void __sanitizer_unaligned_store64(uu64 *addr, u64 v) {
    120   __tsan_unaligned_write8(addr);
    121   *addr = v;
    122 }
    123 }  // extern "C"
    124 
    125 void __tsan_acquire(void *addr) {
    126   Acquire(cur_thread(), CALLERPC, (uptr)addr);
    127 }
    128 
    129 void __tsan_release(void *addr) {
    130   Release(cur_thread(), CALLERPC, (uptr)addr);
    131 }
    132