forked from OSchip/llvm-project
231 lines
7.3 KiB
C++
231 lines
7.3 KiB
C++
//===-- DataExtractorTest.cpp ---------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "gtest/gtest.h"
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#include "lldb/Utility/DataExtractor.h"
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using namespace lldb_private;
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TEST(DataExtractorTest, GetBitfield) {
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uint8_t buffer[] = {0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF};
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DataExtractor LE(buffer, sizeof(buffer), lldb::eByteOrderLittle,
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sizeof(void *));
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DataExtractor BE(buffer, sizeof(buffer), lldb::eByteOrderBig, sizeof(void *));
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lldb::offset_t offset;
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offset = 0;
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ASSERT_EQ(buffer[1], LE.GetMaxU64Bitfield(&offset, sizeof(buffer), 8, 8));
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offset = 0;
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ASSERT_EQ(buffer[1], BE.GetMaxU64Bitfield(&offset, sizeof(buffer), 8, 8));
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offset = 0;
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ASSERT_EQ(static_cast<uint64_t>(0xEFCDAB8967452301),
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LE.GetMaxU64Bitfield(&offset, sizeof(buffer), 64, 0));
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offset = 0;
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ASSERT_EQ(static_cast<uint64_t>(0x0123456789ABCDEF),
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BE.GetMaxU64Bitfield(&offset, sizeof(buffer), 64, 0));
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offset = 0;
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ASSERT_EQ(static_cast<uint64_t>(0x01234567),
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BE.GetMaxU64Bitfield(&offset, sizeof(buffer), 32, 0));
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offset = 0;
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ASSERT_EQ(static_cast<uint64_t>(0x012345678),
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BE.GetMaxU64Bitfield(&offset, sizeof(buffer), 36, 0));
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offset = 0;
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ASSERT_EQ(int8_t(buffer[1]),
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LE.GetMaxS64Bitfield(&offset, sizeof(buffer), 8, 8));
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offset = 0;
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ASSERT_EQ(int8_t(buffer[1]),
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BE.GetMaxS64Bitfield(&offset, sizeof(buffer), 8, 8));
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offset = 0;
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ASSERT_EQ(static_cast<int64_t>(0xEFCDAB8967452301),
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LE.GetMaxS64Bitfield(&offset, sizeof(buffer), 64, 0));
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offset = 0;
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ASSERT_EQ(static_cast<int64_t>(0x0123456789ABCDEF),
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BE.GetMaxS64Bitfield(&offset, sizeof(buffer), 64, 0));
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}
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TEST(DataExtractorTest, PeekData) {
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uint8_t buffer[] = {0x01, 0x02, 0x03, 0x04};
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DataExtractor E(buffer, sizeof buffer, lldb::eByteOrderLittle, 4);
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EXPECT_EQ(buffer + 0, E.PeekData(0, 0));
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EXPECT_EQ(buffer + 0, E.PeekData(0, 4));
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EXPECT_EQ(nullptr, E.PeekData(0, 5));
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EXPECT_EQ(buffer + 2, E.PeekData(2, 0));
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EXPECT_EQ(buffer + 2, E.PeekData(2, 2));
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EXPECT_EQ(nullptr, E.PeekData(2, 3));
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EXPECT_EQ(buffer + 4, E.PeekData(4, 0));
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EXPECT_EQ(nullptr, E.PeekData(4, 1));
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}
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TEST(DataExtractorTest, GetCStr) {
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uint8_t buffer[] = {'X', 'f', 'o', 'o', '\0'};
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DataExtractor E(buffer, sizeof buffer, lldb::eByteOrderLittle, 4);
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lldb::offset_t offset = 1;
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EXPECT_STREQ("foo", E.GetCStr(&offset));
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EXPECT_EQ(5U, offset);
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}
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TEST(DataExtractorTest, GetCStrEmpty) {
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uint8_t buffer[] = {'X', '\0'};
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DataExtractor E(buffer, sizeof buffer, lldb::eByteOrderLittle, 4);
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lldb::offset_t offset = 1;
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EXPECT_STREQ("", E.GetCStr(&offset));
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EXPECT_EQ(2U, offset);
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}
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TEST(DataExtractorTest, GetCStrUnterminated) {
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uint8_t buffer[] = {'X', 'f', 'o', 'o'};
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DataExtractor E(buffer, sizeof buffer, lldb::eByteOrderLittle, 4);
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lldb::offset_t offset = 1;
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EXPECT_EQ(nullptr, E.GetCStr(&offset));
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EXPECT_EQ(1U, offset);
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}
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TEST(DataExtractorTest, GetCStrAtEnd) {
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uint8_t buffer[] = {'X'};
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DataExtractor E(buffer, sizeof buffer, lldb::eByteOrderLittle, 4);
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lldb::offset_t offset = 1;
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EXPECT_EQ(nullptr, E.GetCStr(&offset));
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EXPECT_EQ(1U, offset);
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}
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TEST(DataExtractorTest, GetCStrAtNullOffset) {
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uint8_t buffer[] = {'f', 'o', 'o', '\0'};
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DataExtractor E(buffer, sizeof buffer, lldb::eByteOrderLittle, 4);
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lldb::offset_t offset = 0;
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EXPECT_STREQ("foo", E.GetCStr(&offset));
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EXPECT_EQ(4U, offset);
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}
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TEST(DataExtractorTest, GetMaxU64) {
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uint8_t buffer[] = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08};
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DataExtractor LE(buffer, sizeof(buffer), lldb::eByteOrderLittle,
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sizeof(void *));
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DataExtractor BE(buffer, sizeof(buffer), lldb::eByteOrderBig, sizeof(void *));
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lldb::offset_t offset;
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// Check with the minimum allowed byte size.
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offset = 0;
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EXPECT_EQ(0x01U, LE.GetMaxU64(&offset, 1));
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EXPECT_EQ(1U, offset);
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offset = 0;
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EXPECT_EQ(0x01U, BE.GetMaxU64(&offset, 1));
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EXPECT_EQ(1U, offset);
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// Check with a non-zero offset.
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offset = 1;
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EXPECT_EQ(0x0302U, LE.GetMaxU64(&offset, 2));
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EXPECT_EQ(3U, offset);
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offset = 1;
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EXPECT_EQ(0x0203U, BE.GetMaxU64(&offset, 2));
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EXPECT_EQ(3U, offset);
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// Check with the byte size not being a multiple of 2.
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offset = 0;
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EXPECT_EQ(0x07060504030201U, LE.GetMaxU64(&offset, 7));
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EXPECT_EQ(7U, offset);
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offset = 0;
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EXPECT_EQ(0x01020304050607U, BE.GetMaxU64(&offset, 7));
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EXPECT_EQ(7U, offset);
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// Check with the maximum allowed byte size.
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offset = 0;
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EXPECT_EQ(0x0807060504030201U, LE.GetMaxU64(&offset, 8));
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EXPECT_EQ(8U, offset);
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offset = 0;
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EXPECT_EQ(0x0102030405060708U, BE.GetMaxU64(&offset, 8));
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EXPECT_EQ(8U, offset);
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}
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TEST(DataExtractorTest, GetMaxS64) {
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uint8_t buffer[] = {0x01, 0x02, 0x83, 0x04, 0x05, 0x06, 0x07, 0x08};
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DataExtractor LE(buffer, sizeof(buffer), lldb::eByteOrderLittle,
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sizeof(void *));
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DataExtractor BE(buffer, sizeof(buffer), lldb::eByteOrderBig, sizeof(void *));
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lldb::offset_t offset;
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// Check with the minimum allowed byte size.
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offset = 0;
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EXPECT_EQ(0x01, LE.GetMaxS64(&offset, 1));
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EXPECT_EQ(1U, offset);
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offset = 0;
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EXPECT_EQ(0x01, BE.GetMaxS64(&offset, 1));
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EXPECT_EQ(1U, offset);
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// Check that sign extension works correctly.
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offset = 0;
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int64_t value = LE.GetMaxS64(&offset, 3);
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EXPECT_EQ(0xffffffffff830201U, *reinterpret_cast<uint64_t *>(&value));
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EXPECT_EQ(3U, offset);
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offset = 2;
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value = BE.GetMaxS64(&offset, 3);
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EXPECT_EQ(0xffffffffff830405U, *reinterpret_cast<uint64_t *>(&value));
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EXPECT_EQ(5U, offset);
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// Check with the maximum allowed byte size.
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offset = 0;
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EXPECT_EQ(0x0807060504830201, LE.GetMaxS64(&offset, 8));
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EXPECT_EQ(8U, offset);
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offset = 0;
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EXPECT_EQ(0x0102830405060708, BE.GetMaxS64(&offset, 8));
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EXPECT_EQ(8U, offset);
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}
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TEST(DataExtractorTest, GetMaxU64_unchecked) {
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uint8_t buffer[] = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08};
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DataExtractor LE(buffer, sizeof(buffer), lldb::eByteOrderLittle,
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sizeof(void *));
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DataExtractor BE(buffer, sizeof(buffer), lldb::eByteOrderBig, sizeof(void *));
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lldb::offset_t offset;
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// Check with the minimum allowed byte size.
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offset = 0;
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EXPECT_EQ(0x01U, LE.GetMaxU64_unchecked(&offset, 1));
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EXPECT_EQ(1U, offset);
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offset = 0;
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EXPECT_EQ(0x01U, BE.GetMaxU64_unchecked(&offset, 1));
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EXPECT_EQ(1U, offset);
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// Check with a non-zero offset.
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offset = 1;
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EXPECT_EQ(0x0302U, LE.GetMaxU64_unchecked(&offset, 2));
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EXPECT_EQ(3U, offset);
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offset = 1;
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EXPECT_EQ(0x0203U, BE.GetMaxU64_unchecked(&offset, 2));
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EXPECT_EQ(3U, offset);
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// Check with the byte size not being a multiple of 2.
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offset = 0;
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EXPECT_EQ(0x07060504030201U, LE.GetMaxU64_unchecked(&offset, 7));
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EXPECT_EQ(7U, offset);
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offset = 0;
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EXPECT_EQ(0x01020304050607U, BE.GetMaxU64_unchecked(&offset, 7));
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EXPECT_EQ(7U, offset);
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// Check with the maximum allowed byte size.
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offset = 0;
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EXPECT_EQ(0x0807060504030201U, LE.GetMaxU64_unchecked(&offset, 8));
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EXPECT_EQ(8U, offset);
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offset = 0;
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EXPECT_EQ(0x0102030405060708U, BE.GetMaxU64_unchecked(&offset, 8));
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EXPECT_EQ(8U, offset);
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}
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