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      1 //===-- tsan_string.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 #include "tsan_test_util.h"
     14 #include "gtest/gtest.h"
     15 #include <string.h>
     16 
     17 namespace __tsan {
     18 
     19 TEST(ThreadSanitizer, Memcpy) {
     20   char data0[7] = {1, 2, 3, 4, 5, 6, 7};
     21   char data[7] = {42, 42, 42, 42, 42, 42, 42};
     22   MainThread().Memcpy(data+1, data0+1, 5);
     23   EXPECT_EQ(data[0], 42);
     24   EXPECT_EQ(data[1], 2);
     25   EXPECT_EQ(data[2], 3);
     26   EXPECT_EQ(data[3], 4);
     27   EXPECT_EQ(data[4], 5);
     28   EXPECT_EQ(data[5], 6);
     29   EXPECT_EQ(data[6], 42);
     30   MainThread().Memset(data+1, 13, 5);
     31   EXPECT_EQ(data[0], 42);
     32   EXPECT_EQ(data[1], 13);
     33   EXPECT_EQ(data[2], 13);
     34   EXPECT_EQ(data[3], 13);
     35   EXPECT_EQ(data[4], 13);
     36   EXPECT_EQ(data[5], 13);
     37   EXPECT_EQ(data[6], 42);
     38 }
     39 
     40 TEST(ThreadSanitizer, MemcpyRace1) {
     41   char *data = new char[10];
     42   char *data1 = new char[10];
     43   char *data2 = new char[10];
     44   ScopedThread t1, t2;
     45   t1.Memcpy(data, data1, 10);
     46   t2.Memcpy(data, data2, 10, true);
     47 }
     48 
     49 TEST(ThreadSanitizer, MemcpyRace2) {
     50   char *data = new char[10];
     51   char *data1 = new char[10];
     52   char *data2 = new char[10];
     53   ScopedThread t1, t2;
     54   t1.Memcpy(data+5, data1, 1);
     55   t2.Memcpy(data+3, data2, 4, true);
     56 }
     57 
     58 TEST(ThreadSanitizer, MemcpyRace3) {
     59   char *data = new char[10];
     60   char *data1 = new char[10];
     61   char *data2 = new char[10];
     62   ScopedThread t1, t2;
     63   t1.Memcpy(data, data1, 10);
     64   t2.Memcpy(data1, data2, 10, true);
     65 }
     66 
     67 TEST(ThreadSanitizer, MemcpyStack) {
     68   char *data = new char[10];
     69   char *data1 = new char[10];
     70   ScopedThread t1, t2;
     71   t1.Memcpy(data, data1, 10);
     72   t2.Memcpy(data, data1, 10, true);
     73 }
     74 
     75 TEST(ThreadSanitizer, MemsetRace1) {
     76   char *data = new char[10];
     77   ScopedThread t1, t2;
     78   t1.Memset(data, 1, 10);
     79   t2.Memset(data, 2, 10, true);
     80 }
     81 
     82 }  // namespace __tsan
     83