sanitizer_libc_test.cc revision 626e6fdd9c01c9b683c33656c2014ef9a2690e50 
1//===-- sanitizer_libc_test.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// Tests for sanitizer_libc.h.
10//===----------------------------------------------------------------------===//
11
12#include "sanitizer_common/sanitizer_common.h"
13#include "sanitizer_common/sanitizer_libc.h"
14#include "gtest/gtest.h"
15
16#if defined(__linux__) || defined(__APPLE__)
17# define SANITIZER_TEST_HAS_STAT_H 1
18# include <sys/stat.h>
19#else
20# define SANITIZER_TEST_HAS_STAT_H 0
21#endif
22
23// A regression test for internal_memmove() implementation.
24TEST(SanitizerCommon, InternalMemmoveRegression) {
25  char src[] = "Hello World";
26  char *dest = src + 6;
27  __sanitizer::internal_memmove(dest, src, 5);
28  EXPECT_EQ(dest[0], src[0]);
29  EXPECT_EQ(dest[4], src[4]);
30}
31
32TEST(SanitizerCommon, mem_is_zero) {
33  size_t size = 128;
34  char *x = new char[size];
35  memset(x, 0, size);
36  for (size_t pos = 0; pos < size; pos++) {
37    x[pos] = 1;
38    for (size_t beg = 0; beg < size; beg++) {
39      for (size_t end = beg; end < size; end++) {
40        // fprintf(stderr, "pos %zd beg %zd end %zd \n", pos, beg, end);
41        if (beg <= pos && pos < end)
42          EXPECT_FALSE(__sanitizer::mem_is_zero(x + beg, end - beg));
43        else
44          EXPECT_TRUE(__sanitizer::mem_is_zero(x + beg, end - beg));
45      }
46    }
47    x[pos] = 0;
48  }
49  delete [] x;
50}
51
52TEST(SanitizerCommon, FileOps) {
53  const char *str1 = "qwerty";
54  uptr len1 = internal_strlen(str1);
55  const char *str2 = "zxcv";
56  uptr len2 = internal_strlen(str2);
57
58  u32 uid = GetUid();
59  char temp_filename[128];
60#ifdef __ANDROID__
61  // I don't know a way to query temp directory location on Android without
62  // going through Java interfaces. The code below is not ideal, but should
63  // work. May require "adb root", but it is needed for almost any use of ASan
64  // on Android already.
65  internal_snprintf(temp_filename, sizeof(temp_filename),
66                    "%s/sanitizer_common.tmp.%d",
67                    GetEnv("EXTERNAL_STORAGE"), uid);
68#else
69  internal_snprintf(temp_filename, sizeof(temp_filename),
70                    "/tmp/sanitizer_common.tmp.%d", uid);
71#endif
72  fd_t fd = OpenFile(temp_filename, true);
73  EXPECT_NE(fd, kInvalidFd);
74  EXPECT_EQ(len1, internal_write(fd, str1, len1));
75  EXPECT_EQ(len2, internal_write(fd, str2, len2));
76  internal_close(fd);
77
78  fd = OpenFile(temp_filename, false);
79  EXPECT_NE(fd, kInvalidFd);
80  uptr fsize = internal_filesize(fd);
81  EXPECT_EQ(len1 + len2, fsize);
82
83#if SANITIZER_TEST_HAS_STAT_H
84  struct stat st1, st2, st3;
85  EXPECT_EQ(0, internal_stat(temp_filename, &st1));
86  EXPECT_EQ(0, internal_lstat(temp_filename, &st2));
87  EXPECT_EQ(0, internal_fstat(fd, &st3));
88  EXPECT_EQ(fsize, (uptr)st3.st_size);
89#endif
90
91  char buf[64] = {};
92  EXPECT_EQ(len1, internal_read(fd, buf, len1));
93  EXPECT_EQ(0, internal_memcmp(buf, str1, len1));
94  EXPECT_EQ((char)0, buf[len1 + 1]);
95  internal_memset(buf, 0, len1);
96  EXPECT_EQ(len2, internal_read(fd, buf, len2));
97  EXPECT_EQ(0, internal_memcmp(buf, str2, len2));
98  internal_close(fd);
99}
100