//===- llvm/unittest/Support/LEB128Test.cpp - LEB128 function tests -------===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// #include "gtest/gtest.h" #include "llvm/Support/DataTypes.h" #include "llvm/Support/LEB128.h" #include "llvm/Support/raw_ostream.h" #include using namespace llvm; namespace { TEST(LEB128Test, EncodeSLEB128) { #define EXPECT_SLEB128_EQ(EXPECTED, VALUE) \ do { \ /* encodeSLEB128(uint64_t, raw_ostream &) */ \ std::string Expected(EXPECTED, sizeof(EXPECTED) - 1); \ std::string Actual; \ raw_string_ostream Stream(Actual); \ encodeSLEB128(VALUE, Stream); \ Stream.flush(); \ EXPECT_EQ(Expected, Actual); \ } while (0) // Encode SLEB128 EXPECT_SLEB128_EQ("\x00", 0); EXPECT_SLEB128_EQ("\x01", 1); EXPECT_SLEB128_EQ("\x7f", -1); EXPECT_SLEB128_EQ("\x3f", 63); EXPECT_SLEB128_EQ("\x41", -63); EXPECT_SLEB128_EQ("\x40", -64); EXPECT_SLEB128_EQ("\xbf\x7f", -65); EXPECT_SLEB128_EQ("\xc0\x00", 64); #undef EXPECT_SLEB128_EQ } TEST(LEB128Test, EncodeULEB128) { #define EXPECT_ULEB128_EQ(EXPECTED, VALUE, PAD) \ do { \ std::string Expected(EXPECTED, sizeof(EXPECTED) - 1); \ \ /* encodeULEB128(uint64_t, raw_ostream &, unsigned) */ \ std::string Actual1; \ raw_string_ostream Stream(Actual1); \ encodeULEB128(VALUE, Stream, PAD); \ Stream.flush(); \ EXPECT_EQ(Expected, Actual1); \ \ /* encodeULEB128(uint64_t, uint8_t *, unsigned) */ \ uint8_t Buffer[32]; \ unsigned Size = encodeULEB128(VALUE, Buffer, PAD); \ std::string Actual2(reinterpret_cast(Buffer), Size); \ EXPECT_EQ(Expected, Actual2); \ } while (0) // Encode ULEB128 EXPECT_ULEB128_EQ("\x00", 0, 0); EXPECT_ULEB128_EQ("\x01", 1, 0); EXPECT_ULEB128_EQ("\x3f", 63, 0); EXPECT_ULEB128_EQ("\x40", 64, 0); EXPECT_ULEB128_EQ("\x7f", 0x7f, 0); EXPECT_ULEB128_EQ("\x80\x01", 0x80, 0); EXPECT_ULEB128_EQ("\x81\x01", 0x81, 0); EXPECT_ULEB128_EQ("\x90\x01", 0x90, 0); EXPECT_ULEB128_EQ("\xff\x01", 0xff, 0); EXPECT_ULEB128_EQ("\x80\x02", 0x100, 0); EXPECT_ULEB128_EQ("\x81\x02", 0x101, 0); // Encode ULEB128 with some extra padding bytes EXPECT_ULEB128_EQ("\x80\x00", 0, 1); EXPECT_ULEB128_EQ("\x80\x80\x00", 0, 2); EXPECT_ULEB128_EQ("\xff\x00", 0x7f, 1); EXPECT_ULEB128_EQ("\xff\x80\x00", 0x7f, 2); EXPECT_ULEB128_EQ("\x80\x81\x00", 0x80, 1); EXPECT_ULEB128_EQ("\x80\x81\x80\x00", 0x80, 2); #undef EXPECT_ULEB128_EQ } TEST(LEB128Test, DecodeULEB128) { #define EXPECT_DECODE_ULEB128_EQ(EXPECTED, VALUE) \ do { \ unsigned ActualSize = 0; \ uint64_t Actual = decodeULEB128(reinterpret_cast(VALUE), \ &ActualSize); \ EXPECT_EQ(sizeof(VALUE) - 1, ActualSize); \ EXPECT_EQ(EXPECTED, Actual); \ } while (0) // Decode ULEB128 EXPECT_DECODE_ULEB128_EQ(0u, "\x00"); EXPECT_DECODE_ULEB128_EQ(1u, "\x01"); EXPECT_DECODE_ULEB128_EQ(63u, "\x3f"); EXPECT_DECODE_ULEB128_EQ(64u, "\x40"); EXPECT_DECODE_ULEB128_EQ(0x7fu, "\x7f"); EXPECT_DECODE_ULEB128_EQ(0x80u, "\x80\x01"); EXPECT_DECODE_ULEB128_EQ(0x81u, "\x81\x01"); EXPECT_DECODE_ULEB128_EQ(0x90u, "\x90\x01"); EXPECT_DECODE_ULEB128_EQ(0xffu, "\xff\x01"); EXPECT_DECODE_ULEB128_EQ(0x100u, "\x80\x02"); EXPECT_DECODE_ULEB128_EQ(0x101u, "\x81\x02"); // Decode ULEB128 with extra padding bytes EXPECT_DECODE_ULEB128_EQ(0u, "\x80\x00"); EXPECT_DECODE_ULEB128_EQ(0u, "\x80\x80\x00"); EXPECT_DECODE_ULEB128_EQ(0x7fu, "\xff\x00"); EXPECT_DECODE_ULEB128_EQ(0x7fu, "\xff\x80\x00"); EXPECT_DECODE_ULEB128_EQ(0x80u, "\x80\x81\x00"); EXPECT_DECODE_ULEB128_EQ(0x80u, "\x80\x81\x80\x00"); #undef EXPECT_DECODE_ULEB128_EQ } TEST(LEB128Test, SLEB128Size) { // Positive Value Testing Plan: // (1) 128 ^ n - 1 ........ need (n+1) bytes // (2) 128 ^ n ............ need (n+1) bytes // (3) 128 ^ n * 63 ....... need (n+1) bytes // (4) 128 ^ n * 64 - 1 ... need (n+1) bytes // (5) 128 ^ n * 64 ....... need (n+2) bytes EXPECT_EQ(1u, getSLEB128Size(0x0LL)); EXPECT_EQ(1u, getSLEB128Size(0x1LL)); EXPECT_EQ(1u, getSLEB128Size(0x3fLL)); EXPECT_EQ(1u, getSLEB128Size(0x3fLL)); EXPECT_EQ(2u, getSLEB128Size(0x40LL)); EXPECT_EQ(2u, getSLEB128Size(0x7fLL)); EXPECT_EQ(2u, getSLEB128Size(0x80LL)); EXPECT_EQ(2u, getSLEB128Size(0x1f80LL)); EXPECT_EQ(2u, getSLEB128Size(0x1fffLL)); EXPECT_EQ(3u, getSLEB128Size(0x2000LL)); EXPECT_EQ(3u, getSLEB128Size(0x3fffLL)); EXPECT_EQ(3u, getSLEB128Size(0x4000LL)); EXPECT_EQ(3u, getSLEB128Size(0xfc000LL)); EXPECT_EQ(3u, getSLEB128Size(0xfffffLL)); EXPECT_EQ(4u, getSLEB128Size(0x100000LL)); EXPECT_EQ(4u, getSLEB128Size(0x1fffffLL)); EXPECT_EQ(4u, getSLEB128Size(0x200000LL)); EXPECT_EQ(4u, getSLEB128Size(0x7e00000LL)); EXPECT_EQ(4u, getSLEB128Size(0x7ffffffLL)); EXPECT_EQ(5u, getSLEB128Size(0x8000000LL)); EXPECT_EQ(5u, getSLEB128Size(0xfffffffLL)); EXPECT_EQ(5u, getSLEB128Size(0x10000000LL)); EXPECT_EQ(5u, getSLEB128Size(0x3f0000000LL)); EXPECT_EQ(5u, getSLEB128Size(0x3ffffffffLL)); EXPECT_EQ(6u, getSLEB128Size(0x400000000LL)); EXPECT_EQ(6u, getSLEB128Size(0x7ffffffffLL)); EXPECT_EQ(6u, getSLEB128Size(0x800000000LL)); EXPECT_EQ(6u, getSLEB128Size(0x1f800000000LL)); EXPECT_EQ(6u, getSLEB128Size(0x1ffffffffffLL)); EXPECT_EQ(7u, getSLEB128Size(0x20000000000LL)); EXPECT_EQ(7u, getSLEB128Size(0x3ffffffffffLL)); EXPECT_EQ(7u, getSLEB128Size(0x40000000000LL)); EXPECT_EQ(7u, getSLEB128Size(0xfc0000000000LL)); EXPECT_EQ(7u, getSLEB128Size(0xffffffffffffLL)); EXPECT_EQ(8u, getSLEB128Size(0x1000000000000LL)); EXPECT_EQ(8u, getSLEB128Size(0x1ffffffffffffLL)); EXPECT_EQ(8u, getSLEB128Size(0x2000000000000LL)); EXPECT_EQ(8u, getSLEB128Size(0x7e000000000000LL)); EXPECT_EQ(8u, getSLEB128Size(0x7fffffffffffffLL)); EXPECT_EQ(9u, getSLEB128Size(0x80000000000000LL)); EXPECT_EQ(9u, getSLEB128Size(0xffffffffffffffLL)); EXPECT_EQ(9u, getSLEB128Size(0x100000000000000LL)); EXPECT_EQ(9u, getSLEB128Size(0x3f00000000000000LL)); EXPECT_EQ(9u, getSLEB128Size(0x3fffffffffffffffLL)); EXPECT_EQ(10u, getSLEB128Size(0x4000000000000000LL)); EXPECT_EQ(10u, getSLEB128Size(0x7fffffffffffffffLL)); EXPECT_EQ(10u, getSLEB128Size(INT64_MAX)); // Negative Value Testing Plan: // (1) - 128 ^ n - 1 ........ need (n+1) bytes // (2) - 128 ^ n ............ need (n+1) bytes // (3) - 128 ^ n * 63 ....... need (n+1) bytes // (4) - 128 ^ n * 64 ....... need (n+1) bytes (different from positive one) // (5) - 128 ^ n * 65 - 1 ... need (n+2) bytes (if n > 0) // (6) - 128 ^ n * 65 ....... need (n+2) bytes EXPECT_EQ(1u, getSLEB128Size(0x0LL)); EXPECT_EQ(1u, getSLEB128Size(-0x1LL)); EXPECT_EQ(1u, getSLEB128Size(-0x3fLL)); EXPECT_EQ(1u, getSLEB128Size(-0x40LL)); EXPECT_EQ(1u, getSLEB128Size(-0x40LL)); // special case EXPECT_EQ(2u, getSLEB128Size(-0x41LL)); EXPECT_EQ(2u, getSLEB128Size(-0x7fLL)); EXPECT_EQ(2u, getSLEB128Size(-0x80LL)); EXPECT_EQ(2u, getSLEB128Size(-0x1f80LL)); EXPECT_EQ(2u, getSLEB128Size(-0x2000LL)); EXPECT_EQ(3u, getSLEB128Size(-0x207fLL)); EXPECT_EQ(3u, getSLEB128Size(-0x2080LL)); EXPECT_EQ(3u, getSLEB128Size(-0x3fffLL)); EXPECT_EQ(3u, getSLEB128Size(-0x4000LL)); EXPECT_EQ(3u, getSLEB128Size(-0xfc000LL)); EXPECT_EQ(3u, getSLEB128Size(-0x100000LL)); EXPECT_EQ(4u, getSLEB128Size(-0x103fffLL)); EXPECT_EQ(4u, getSLEB128Size(-0x104000LL)); EXPECT_EQ(4u, getSLEB128Size(-0x1fffffLL)); EXPECT_EQ(4u, getSLEB128Size(-0x200000LL)); EXPECT_EQ(4u, getSLEB128Size(-0x7e00000LL)); EXPECT_EQ(4u, getSLEB128Size(-0x8000000LL)); EXPECT_EQ(5u, getSLEB128Size(-0x81fffffLL)); EXPECT_EQ(5u, getSLEB128Size(-0x8200000LL)); EXPECT_EQ(5u, getSLEB128Size(-0xfffffffLL)); EXPECT_EQ(5u, getSLEB128Size(-0x10000000LL)); EXPECT_EQ(5u, getSLEB128Size(-0x3f0000000LL)); EXPECT_EQ(5u, getSLEB128Size(-0x400000000LL)); EXPECT_EQ(6u, getSLEB128Size(-0x40fffffffLL)); EXPECT_EQ(6u, getSLEB128Size(-0x410000000LL)); EXPECT_EQ(6u, getSLEB128Size(-0x7ffffffffLL)); EXPECT_EQ(6u, getSLEB128Size(-0x800000000LL)); EXPECT_EQ(6u, getSLEB128Size(-0x1f800000000LL)); EXPECT_EQ(6u, getSLEB128Size(-0x20000000000LL)); EXPECT_EQ(7u, getSLEB128Size(-0x207ffffffffLL)); EXPECT_EQ(7u, getSLEB128Size(-0x20800000000LL)); EXPECT_EQ(7u, getSLEB128Size(-0x3ffffffffffLL)); EXPECT_EQ(7u, getSLEB128Size(-0x40000000000LL)); EXPECT_EQ(7u, getSLEB128Size(-0xfc0000000000LL)); EXPECT_EQ(7u, getSLEB128Size(-0x1000000000000LL)); EXPECT_EQ(8u, getSLEB128Size(-0x103ffffffffffLL)); EXPECT_EQ(8u, getSLEB128Size(-0x1040000000000LL)); EXPECT_EQ(8u, getSLEB128Size(-0x1ffffffffffffLL)); EXPECT_EQ(8u, getSLEB128Size(-0x2000000000000LL)); EXPECT_EQ(8u, getSLEB128Size(-0x7e000000000000LL)); EXPECT_EQ(8u, getSLEB128Size(-0x80000000000000LL)); EXPECT_EQ(9u, getSLEB128Size(-0x81ffffffffffffLL)); EXPECT_EQ(9u, getSLEB128Size(-0x82000000000000LL)); EXPECT_EQ(9u, getSLEB128Size(-0xffffffffffffffLL)); EXPECT_EQ(9u, getSLEB128Size(-0x100000000000000LL)); EXPECT_EQ(9u, getSLEB128Size(-0x3f00000000000000LL)); EXPECT_EQ(9u, getSLEB128Size(-0x4000000000000000LL)); EXPECT_EQ(10u, getSLEB128Size(-0x40ffffffffffffffLL)); EXPECT_EQ(10u, getSLEB128Size(-0x4100000000000000LL)); EXPECT_EQ(10u, getSLEB128Size(-0x7fffffffffffffffLL)); EXPECT_EQ(10u, getSLEB128Size(-0x8000000000000000LL)); EXPECT_EQ(10u, getSLEB128Size(INT64_MIN)); } TEST(LEB128Test, ULEB128Size) { // Testing Plan: // (1) 128 ^ n ............ need (n+1) bytes // (2) 128 ^ n * 64 ....... need (n+1) bytes // (3) 128 ^ (n+1) - 1 .... need (n+1) bytes EXPECT_EQ(1u, getULEB128Size(0)); // special case EXPECT_EQ(1u, getULEB128Size(0x1ULL)); EXPECT_EQ(1u, getULEB128Size(0x40ULL)); EXPECT_EQ(1u, getULEB128Size(0x7fULL)); EXPECT_EQ(2u, getULEB128Size(0x80ULL)); EXPECT_EQ(2u, getULEB128Size(0x2000ULL)); EXPECT_EQ(2u, getULEB128Size(0x3fffULL)); EXPECT_EQ(3u, getULEB128Size(0x4000ULL)); EXPECT_EQ(3u, getULEB128Size(0x100000ULL)); EXPECT_EQ(3u, getULEB128Size(0x1fffffULL)); EXPECT_EQ(4u, getULEB128Size(0x200000ULL)); EXPECT_EQ(4u, getULEB128Size(0x8000000ULL)); EXPECT_EQ(4u, getULEB128Size(0xfffffffULL)); EXPECT_EQ(5u, getULEB128Size(0x10000000ULL)); EXPECT_EQ(5u, getULEB128Size(0x400000000ULL)); EXPECT_EQ(5u, getULEB128Size(0x7ffffffffULL)); EXPECT_EQ(6u, getULEB128Size(0x800000000ULL)); EXPECT_EQ(6u, getULEB128Size(0x20000000000ULL)); EXPECT_EQ(6u, getULEB128Size(0x3ffffffffffULL)); EXPECT_EQ(7u, getULEB128Size(0x40000000000ULL)); EXPECT_EQ(7u, getULEB128Size(0x1000000000000ULL)); EXPECT_EQ(7u, getULEB128Size(0x1ffffffffffffULL)); EXPECT_EQ(8u, getULEB128Size(0x2000000000000ULL)); EXPECT_EQ(8u, getULEB128Size(0x80000000000000ULL)); EXPECT_EQ(8u, getULEB128Size(0xffffffffffffffULL)); EXPECT_EQ(9u, getULEB128Size(0x100000000000000ULL)); EXPECT_EQ(9u, getULEB128Size(0x4000000000000000ULL)); EXPECT_EQ(9u, getULEB128Size(0x7fffffffffffffffULL)); EXPECT_EQ(10u, getULEB128Size(0x8000000000000000ULL)); EXPECT_EQ(10u, getULEB128Size(UINT64_MAX)); } } // anonymous namespace