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Diffstat (limited to 'lib/sanitizer_common/tests/sanitizer_printf_test.cc')
-rw-r--r-- | lib/sanitizer_common/tests/sanitizer_printf_test.cc | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/lib/sanitizer_common/tests/sanitizer_printf_test.cc b/lib/sanitizer_common/tests/sanitizer_printf_test.cc new file mode 100644 index 000000000..7a6a42ea9 --- /dev/null +++ b/lib/sanitizer_common/tests/sanitizer_printf_test.cc @@ -0,0 +1,107 @@ +//===-- sanitizer_printf_test.cc ------------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// Tests for sanitizer_printf.cc +// +//===----------------------------------------------------------------------===// +#include "sanitizer_common/sanitizer_common.h" +#include "sanitizer_common/sanitizer_libc.h" +#include "gtest/gtest.h" + +#include <string.h> +#include <limits.h> + +namespace __sanitizer { + +TEST(Printf, Basic) { + char buf[1024]; + uptr len = internal_snprintf(buf, sizeof(buf), + "a%db%zdc%ue%zuf%xh%zxq%pe%sr", + (int)-1, (long)-2, // NOLINT + (unsigned)-4, (unsigned long)5, // NOLINT + (unsigned)10, (unsigned long)11, // NOLINT + (void*)0x123, "_string_"); + EXPECT_EQ(len, strlen(buf)); + EXPECT_STREQ("a-1b-2c4294967292e5fahbq" + "0x000000000123e_string_r", buf); +} + +TEST(Printf, OverflowStr) { + char buf[] = "123456789"; + uptr len = internal_snprintf(buf, 4, "%s", "abcdef"); // NOLINT + EXPECT_EQ(len, (uptr)6); + EXPECT_STREQ("abc", buf); + EXPECT_EQ(buf[3], 0); + EXPECT_EQ(buf[4], '5'); + EXPECT_EQ(buf[5], '6'); + EXPECT_EQ(buf[6], '7'); + EXPECT_EQ(buf[7], '8'); + EXPECT_EQ(buf[8], '9'); + EXPECT_EQ(buf[9], 0); +} + +TEST(Printf, OverflowInt) { + char buf[] = "123456789"; + internal_snprintf(buf, 4, "%d", -123456789); // NOLINT + EXPECT_STREQ("-12", buf); + EXPECT_EQ(buf[3], 0); + EXPECT_EQ(buf[4], '5'); + EXPECT_EQ(buf[5], '6'); + EXPECT_EQ(buf[6], '7'); + EXPECT_EQ(buf[7], '8'); + EXPECT_EQ(buf[8], '9'); + EXPECT_EQ(buf[9], 0); +} + +TEST(Printf, OverflowUint) { + char buf[] = "123456789"; + internal_snprintf(buf, 4, "a%zx", (unsigned long)0x123456789); // NOLINT + EXPECT_STREQ("a12", buf); + EXPECT_EQ(buf[3], 0); + EXPECT_EQ(buf[4], '5'); + EXPECT_EQ(buf[5], '6'); + EXPECT_EQ(buf[6], '7'); + EXPECT_EQ(buf[7], '8'); + EXPECT_EQ(buf[8], '9'); + EXPECT_EQ(buf[9], 0); +} + +TEST(Printf, OverflowPtr) { + char buf[] = "123456789"; + internal_snprintf(buf, 4, "%p", (void*)0x123456789); // NOLINT + EXPECT_STREQ("0x0", buf); + EXPECT_EQ(buf[3], 0); + EXPECT_EQ(buf[4], '5'); + EXPECT_EQ(buf[5], '6'); + EXPECT_EQ(buf[6], '7'); + EXPECT_EQ(buf[7], '8'); + EXPECT_EQ(buf[8], '9'); + EXPECT_EQ(buf[9], 0); +} + +template<typename T> +static void TestMinMax(const char *fmt, T min, T max) { + char buf[1024]; + uptr len = internal_snprintf(buf, sizeof(buf), fmt, min, max); + char buf2[1024]; + snprintf(buf2, sizeof(buf2), fmt, min, max); + EXPECT_EQ(len, strlen(buf)); + EXPECT_STREQ(buf2, buf); +} + +TEST(Printf, MinMax) { + TestMinMax<int>("%d-%d", INT_MIN, INT_MAX); // NOLINT + TestMinMax<long>("%zd-%zd", LONG_MIN, LONG_MAX); // NOLINT + TestMinMax<unsigned>("%u-%u", 0, UINT_MAX); // NOLINT + TestMinMax<unsigned long>("%zu-%zu", 0, ULONG_MAX); // NOLINT + TestMinMax<unsigned>("%x-%x", 0, UINT_MAX); // NOLINT + TestMinMax<unsigned long>("%zx-%zx", 0, ULONG_MAX); // NOLINT +} + +} // namespace __sanitizer |