1 //===-- tsan_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 // This file is a part of ThreadSanitizer (TSan), a race detector. 11 // 12 //===----------------------------------------------------------------------===// 13 #include "tsan_rtl.h" 14 #include "gtest/gtest.h" 15 16 #include <string.h> 17 #include <limits.h> 18 19 namespace __tsan { 20 21 TEST(Printf, Basic) { 22 char buf[1024]; 23 uptr len = internal_snprintf(buf, sizeof(buf), 24 "a%db%zdc%ue%zuf%xh%zxq%pe%sr", 25 (int)-1, (long)-2, // NOLINT 26 (unsigned)-4, (unsigned long)5, // NOLINT 27 (unsigned)10, (unsigned long)11, // NOLINT 28 (void*)0x123, "_string_"); 29 EXPECT_EQ(len, strlen(buf)); 30 EXPECT_EQ(0, strcmp(buf, "a-1b-2c4294967292e5fahbq" 31 "0x000000000123e_string_r")); 32 } 33 34 TEST(Printf, OverflowStr) { 35 char buf[] = "123456789"; 36 uptr len = internal_snprintf(buf, 4, "%s", "abcdef"); // NOLINT 37 EXPECT_EQ(len, (uptr)6); 38 EXPECT_EQ(0, strcmp(buf, "abc")); 39 EXPECT_EQ(buf[3], 0); 40 EXPECT_EQ(buf[4], '5'); 41 EXPECT_EQ(buf[5], '6'); 42 EXPECT_EQ(buf[6], '7'); 43 EXPECT_EQ(buf[7], '8'); 44 EXPECT_EQ(buf[8], '9'); 45 EXPECT_EQ(buf[9], 0); 46 } 47 48 TEST(Printf, OverflowInt) { 49 char buf[] = "123456789"; 50 internal_snprintf(buf, 4, "%d", -123456789); // NOLINT 51 EXPECT_EQ(0, strcmp(buf, "-12")); 52 EXPECT_EQ(buf[3], 0); 53 EXPECT_EQ(buf[4], '5'); 54 EXPECT_EQ(buf[5], '6'); 55 EXPECT_EQ(buf[6], '7'); 56 EXPECT_EQ(buf[7], '8'); 57 EXPECT_EQ(buf[8], '9'); 58 EXPECT_EQ(buf[9], 0); 59 } 60 61 TEST(Printf, OverflowUint) { 62 char buf[] = "123456789"; 63 internal_snprintf(buf, 4, "a%zx", (unsigned long)0x123456789); // NOLINT 64 EXPECT_EQ(0, strcmp(buf, "a12")); 65 EXPECT_EQ(buf[3], 0); 66 EXPECT_EQ(buf[4], '5'); 67 EXPECT_EQ(buf[5], '6'); 68 EXPECT_EQ(buf[6], '7'); 69 EXPECT_EQ(buf[7], '8'); 70 EXPECT_EQ(buf[8], '9'); 71 EXPECT_EQ(buf[9], 0); 72 } 73 74 TEST(Printf, OverflowPtr) { 75 char buf[] = "123456789"; 76 internal_snprintf(buf, 4, "%p", (void*)0x123456789); // NOLINT 77 EXPECT_EQ(0, strcmp(buf, "0x0")); 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 87 template<typename T> 88 static void TestMinMax(const char *fmt, T min, T max) { 89 char buf[1024]; 90 uptr len = internal_snprintf(buf, sizeof(buf), fmt, min, max); 91 char buf2[1024]; 92 snprintf(buf2, sizeof(buf2), fmt, min, max); 93 EXPECT_EQ(len, strlen(buf)); 94 EXPECT_EQ(0, strcmp(buf, buf2)); 95 } 96 97 TEST(Printf, MinMax) { 98 TestMinMax<int>("%d-%d", INT_MIN, INT_MAX); // NOLINT 99 TestMinMax<long>("%zd-%zd", LONG_MIN, LONG_MAX); // NOLINT 100 TestMinMax<unsigned>("%u-%u", 0, UINT_MAX); // NOLINT 101 TestMinMax<unsigned long>("%zu-%zu", 0, ULONG_MAX); // NOLINT 102 TestMinMax<unsigned>("%x-%x", 0, UINT_MAX); // NOLINT 103 TestMinMax<unsigned long>("%zx-%zx", 0, ULONG_MAX); // NOLINT 104 } 105 106 } // namespace __tsan 107
