sanitizer_printf_test.cc revision 2d1fdb26e458c4ddc04155c1d421bced3ba90cd0 
1//===-- sanitizer_printf_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//
10// Tests for sanitizer_printf.cc
11//
12//===----------------------------------------------------------------------===//
13#include "sanitizer_common/sanitizer_common.h"
14#include "sanitizer_common/sanitizer_libc.h"
15#include "gtest/gtest.h"
16
17#include <string.h>
18#include <limits.h>
19
20namespace __sanitizer {
21
22TEST(Printf, Basic) {
23  char buf[1024];
24  uptr len = internal_snprintf(buf, sizeof(buf),
25      "a%db%zdc%ue%zuf%xh%zxq%pe%sr",
26      (int)-1, (long)-2, // NOLINT
27      (unsigned)-4, (unsigned long)5, // NOLINT
28      (unsigned)10, (unsigned long)11, // NOLINT
29      (void*)0x123, "_string_");
30  EXPECT_EQ(len, strlen(buf));
31  void *ptr;
32  if (sizeof(ptr) == 4) {
33    EXPECT_STREQ("a-1b-2c4294967292e5fahbq"
34                 "0x00000123e_string_r", buf);
35  } else {
36    EXPECT_STREQ("a-1b-2c4294967292e5fahbq"
37                 "0x000000000123e_string_r", buf);
38  }
39}
40
41TEST(Printf, OverflowStr) {
42  char buf[] = "123456789";
43  uptr len = internal_snprintf(buf, 4, "%s", "abcdef");  // NOLINT
44  EXPECT_EQ(len, (uptr)6);
45  EXPECT_STREQ("abc", buf);
46  EXPECT_EQ(buf[3], 0);
47  EXPECT_EQ(buf[4], '5');
48  EXPECT_EQ(buf[5], '6');
49  EXPECT_EQ(buf[6], '7');
50  EXPECT_EQ(buf[7], '8');
51  EXPECT_EQ(buf[8], '9');
52  EXPECT_EQ(buf[9], 0);
53}
54
55TEST(Printf, OverflowInt) {
56  char buf[] = "123456789";
57  internal_snprintf(buf, 4, "%d", -123456789);  // NOLINT
58  EXPECT_STREQ("-12", buf);
59  EXPECT_EQ(buf[3], 0);
60  EXPECT_EQ(buf[4], '5');
61  EXPECT_EQ(buf[5], '6');
62  EXPECT_EQ(buf[6], '7');
63  EXPECT_EQ(buf[7], '8');
64  EXPECT_EQ(buf[8], '9');
65  EXPECT_EQ(buf[9], 0);
66}
67
68TEST(Printf, OverflowUint) {
69  char buf[] = "123456789";
70  uptr val;
71  if (sizeof(val) == 4) {
72    val = (uptr)0x12345678;
73  } else {
74    val = (uptr)0x123456789ULL;
75  }
76  internal_snprintf(buf, 4, "a%zx", val);  // NOLINT
77  EXPECT_STREQ("a12", buf);
78  EXPECT_EQ(buf[3], 0);
79  EXPECT_EQ(buf[4], '5');
80  EXPECT_EQ(buf[5], '6');
81  EXPECT_EQ(buf[6], '7');
82  EXPECT_EQ(buf[7], '8');
83  EXPECT_EQ(buf[8], '9');
84  EXPECT_EQ(buf[9], 0);
85}
86
87TEST(Printf, OverflowPtr) {
88  char buf[] = "123456789";
89  void *p;
90  if (sizeof(p) == 4) {
91    p = (void*)0x1234567;
92  } else {
93    p = (void*)0x123456789ULL;
94  }
95  internal_snprintf(buf, 4, "%p", p);  // NOLINT
96  EXPECT_STREQ("0x0", buf);
97  EXPECT_EQ(buf[3], 0);
98  EXPECT_EQ(buf[4], '5');
99  EXPECT_EQ(buf[5], '6');
100  EXPECT_EQ(buf[6], '7');
101  EXPECT_EQ(buf[7], '8');
102  EXPECT_EQ(buf[8], '9');
103  EXPECT_EQ(buf[9], 0);
104}
105
106#if defined(_WIN32)
107// Oh well, MSVS headers don't define snprintf.
108# define snprintf _snprintf
109#endif
110
111template<typename T>
112static void TestAgainstLibc(const char *fmt, T arg1, T arg2) {
113  char buf[1024];
114  uptr len = internal_snprintf(buf, sizeof(buf), fmt, arg1, arg2);
115  char buf2[1024];
116  snprintf(buf2, sizeof(buf2), fmt, arg1, arg2);
117  EXPECT_EQ(len, strlen(buf));
118  EXPECT_STREQ(buf2, buf);
119}
120
121TEST(Printf, MinMax) {
122  TestAgainstLibc<int>("%d-%d", INT_MIN, INT_MAX);  // NOLINT
123  TestAgainstLibc<unsigned>("%u-%u", 0, UINT_MAX);  // NOLINT
124  TestAgainstLibc<unsigned>("%x-%x", 0, UINT_MAX);  // NOLINT
125#if !defined(_WIN32)
126  // %z* format doesn't seem to be supported by MSVS.
127  TestAgainstLibc<long>("%zd-%zd", LONG_MIN, LONG_MAX);  // NOLINT
128  TestAgainstLibc<unsigned long>("%zu-%zu", 0, ULONG_MAX);  // NOLINT
129  TestAgainstLibc<unsigned long>("%zx-%zx", 0, ULONG_MAX);  // NOLINT
130#endif
131}
132
133TEST(Printf, Padding) {
134  TestAgainstLibc<int>("%3d - %3d", 1, 0);
135  TestAgainstLibc<int>("%3d - %3d", -1, 123);
136  TestAgainstLibc<int>("%3d - %3d", -1, -123);
137  TestAgainstLibc<int>("%3d - %3d", 12, 1234);
138  TestAgainstLibc<int>("%3d - %3d", -12, -1234);
139  TestAgainstLibc<int>("%03d - %03d", 1, 0);
140  TestAgainstLibc<int>("%03d - %03d", -1, 123);
141  TestAgainstLibc<int>("%03d - %03d", -1, -123);
142  TestAgainstLibc<int>("%03d - %03d", 12, 1234);
143  TestAgainstLibc<int>("%03d - %03d", -12, -1234);
144}
145
146TEST(Printf, Precision) {
147  char buf[1024];
148  uptr len = internal_snprintf(buf, sizeof(buf), "%.*s", 3, "12345");
149  EXPECT_EQ(3U, len);
150  EXPECT_STREQ("123", buf);
151  len = internal_snprintf(buf, sizeof(buf), "%.*s", 6, "12345");
152  EXPECT_EQ(5U, len);
153  EXPECT_STREQ("12345", buf);
154}
155
156}  // namespace __sanitizer
157