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