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 20 namespace __sanitizer { 21 22 TEST(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, (uptr)-2, // NOLINT 27 (unsigned)-4, (uptr)5, // NOLINT 28 (unsigned)10, (uptr)11, // NOLINT 29 (void*)0x123, "_string_"); 30 EXPECT_EQ(len, strlen(buf)); 31 32 std::string expectedString = "a-1b-2c4294967292e5fahbq0x"; 33 expectedString += std::string(SANITIZER_POINTER_FORMAT_LENGTH - 3, '0'); 34 expectedString += "123e_string_r"; 35 EXPECT_STREQ(expectedString.c_str(), buf); 36 } 37 38 TEST(Printf, OverflowStr) { 39 char buf[] = "123456789"; 40 uptr len = internal_snprintf(buf, 4, "%s", "abcdef"); // NOLINT 41 EXPECT_EQ(len, (uptr)6); 42 EXPECT_STREQ("abc", buf); 43 EXPECT_EQ(buf[3], 0); 44 EXPECT_EQ(buf[4], '5'); 45 EXPECT_EQ(buf[5], '6'); 46 EXPECT_EQ(buf[6], '7'); 47 EXPECT_EQ(buf[7], '8'); 48 EXPECT_EQ(buf[8], '9'); 49 EXPECT_EQ(buf[9], 0); 50 } 51 52 TEST(Printf, OverflowInt) { 53 char buf[] = "123456789"; 54 internal_snprintf(buf, 4, "%d", -123456789); // NOLINT 55 EXPECT_STREQ("-12", buf); 56 EXPECT_EQ(buf[3], 0); 57 EXPECT_EQ(buf[4], '5'); 58 EXPECT_EQ(buf[5], '6'); 59 EXPECT_EQ(buf[6], '7'); 60 EXPECT_EQ(buf[7], '8'); 61 EXPECT_EQ(buf[8], '9'); 62 EXPECT_EQ(buf[9], 0); 63 } 64 65 TEST(Printf, OverflowUint) { 66 char buf[] = "123456789"; 67 uptr val; 68 if (sizeof(val) == 4) { 69 val = (uptr)0x12345678; 70 } else { 71 val = (uptr)0x123456789ULL; 72 } 73 internal_snprintf(buf, 4, "a%zx", val); // NOLINT 74 EXPECT_STREQ("a12", buf); 75 EXPECT_EQ(buf[3], 0); 76 EXPECT_EQ(buf[4], '5'); 77 EXPECT_EQ(buf[5], '6'); 78 EXPECT_EQ(buf[6], '7'); 79 EXPECT_EQ(buf[7], '8'); 80 EXPECT_EQ(buf[8], '9'); 81 EXPECT_EQ(buf[9], 0); 82 } 83 84 TEST(Printf, OverflowPtr) { 85 char buf[] = "123456789"; 86 void *p; 87 if (sizeof(p) == 4) { 88 p = (void*)0x1234567; 89 } else { 90 p = (void*)0x123456789ULL; 91 } 92 internal_snprintf(buf, 4, "%p", p); // NOLINT 93 EXPECT_STREQ("0x0", buf); 94 EXPECT_EQ(buf[3], 0); 95 EXPECT_EQ(buf[4], '5'); 96 EXPECT_EQ(buf[5], '6'); 97 EXPECT_EQ(buf[6], '7'); 98 EXPECT_EQ(buf[7], '8'); 99 EXPECT_EQ(buf[8], '9'); 100 EXPECT_EQ(buf[9], 0); 101 } 102 103 #if defined(_WIN32) 104 // Oh well, MSVS headers don't define snprintf. 105 # define snprintf _snprintf 106 #endif 107 108 template<typename T> 109 static void TestAgainstLibc(const char *fmt, T arg1, T arg2) { 110 char buf[1024]; 111 uptr len = internal_snprintf(buf, sizeof(buf), fmt, arg1, arg2); 112 char buf2[1024]; 113 snprintf(buf2, sizeof(buf2), fmt, arg1, arg2); 114 EXPECT_EQ(len, strlen(buf)); 115 EXPECT_STREQ(buf2, buf); 116 } 117 118 TEST(Printf, MinMax) { 119 TestAgainstLibc<int>("%d-%d", INT_MIN, INT_MAX); // NOLINT 120 TestAgainstLibc<unsigned>("%u-%u", 0, UINT_MAX); // NOLINT 121 TestAgainstLibc<unsigned>("%x-%x", 0, UINT_MAX); // NOLINT 122 #if !defined(_WIN32) 123 // %z* format doesn't seem to be supported by MSVS. 124 TestAgainstLibc<long>("%zd-%zd", LONG_MIN, LONG_MAX); // NOLINT 125 TestAgainstLibc<unsigned long>("%zu-%zu", 0, ULONG_MAX); // NOLINT 126 TestAgainstLibc<unsigned long>("%zx-%zx", 0, ULONG_MAX); // NOLINT 127 #endif 128 } 129 130 TEST(Printf, Padding) { 131 TestAgainstLibc<int>("%3d - %3d", 1, 0); 132 TestAgainstLibc<int>("%3d - %3d", -1, 123); 133 TestAgainstLibc<int>("%3d - %3d", -1, -123); 134 TestAgainstLibc<int>("%3d - %3d", 12, 1234); 135 TestAgainstLibc<int>("%3d - %3d", -12, -1234); 136 TestAgainstLibc<int>("%03d - %03d", 1, 0); 137 TestAgainstLibc<int>("%03d - %03d", -1, 123); 138 TestAgainstLibc<int>("%03d - %03d", -1, -123); 139 TestAgainstLibc<int>("%03d - %03d", 12, 1234); 140 TestAgainstLibc<int>("%03d - %03d", -12, -1234); 141 } 142 143 TEST(Printf, Precision) { 144 char buf[1024]; 145 uptr len = internal_snprintf(buf, sizeof(buf), "%.*s", 3, "12345"); 146 EXPECT_EQ(3U, len); 147 EXPECT_STREQ("123", buf); 148 len = internal_snprintf(buf, sizeof(buf), "%.*s", 6, "12345"); 149 EXPECT_EQ(5U, len); 150 EXPECT_STREQ("12345", buf); 151 } 152 153 } // namespace __sanitizer 154
