lldb/unittests/Core/ScalarTest.cpp

//===-- ScalarTest.cpp ------------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#if defined(_MSC_VER) && (_HAS_EXCEPTIONS == 0)
// Workaround for MSVC standard library bug, which fails to include <thread> when
// exceptions are disabled.
#include <eh.h>
#endif

#include "gtest/gtest.h"

#include "lldb/Core/Error.h"
#include "lldb/Core/Scalar.h"
#include "lldb/Core/DataExtractor.h"
#include "lldb/Host/Endian.h"

using namespace lldb_private;

TEST(ScalarTest, RightShiftOperator)
{
    int a = 0x00001000;
    int b = 0xFFFFFFFF;
    int c = 4;
    Scalar a_scalar(a);
    Scalar b_scalar(b);
    Scalar c_scalar(c);
    ASSERT_EQ(a >> c, a_scalar >> c_scalar);
    ASSERT_EQ(b >> c, b_scalar >> c_scalar);
}

TEST(ScalarTest, GetBytes)
{
    int a = 0x01020304;
    long long b = 0x0102030405060708LL;
    float c = 1234567.89e42;
    double d = 1234567.89e42;
    char e[16] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
    char f[32] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
                   17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32 };
    Scalar a_scalar(a);
    Scalar b_scalar(b);
    Scalar c_scalar(c);
    Scalar d_scalar(d);
    Scalar e_scalar;
    Scalar f_scalar;
    DataExtractor e_data(e, sizeof(e), endian::InlHostByteOrder(), sizeof(void *));
    Error e_error = e_scalar.SetValueFromData(e_data, lldb::eEncodingUint, sizeof(e));
    DataExtractor f_data(f, sizeof(f), endian::InlHostByteOrder(), sizeof(void *));
    Error f_error = f_scalar.SetValueFromData(f_data, lldb::eEncodingUint, sizeof(f));
    ASSERT_EQ(0, memcmp(&a, a_scalar.GetBytes(), sizeof(a)));
    ASSERT_EQ(0, memcmp(&b, b_scalar.GetBytes(), sizeof(b)));
    ASSERT_EQ(0, memcmp(&c, c_scalar.GetBytes(), sizeof(c)));
    ASSERT_EQ(0, memcmp(&d, d_scalar.GetBytes(), sizeof(d)));
    ASSERT_EQ(0, e_error.Fail());
    ASSERT_EQ(0, memcmp(e, e_scalar.GetBytes(), sizeof(e)));
    ASSERT_EQ(0, f_error.Fail());
    ASSERT_EQ(0, memcmp(f, f_scalar.GetBytes(), sizeof(f)));
}

TEST(ScalarTest, CastOperations)
{
    long long a = 0xf1f2f3f4f5f6f7f8LL;
    Scalar a_scalar(a);
    ASSERT_EQ((signed char)a, a_scalar.SChar());
    ASSERT_EQ((unsigned char)a, a_scalar.UChar());
    ASSERT_EQ((signed short)a, a_scalar.SShort());
    ASSERT_EQ((unsigned short)a, a_scalar.UShort());
    ASSERT_EQ((signed int)a, a_scalar.SInt());
    ASSERT_EQ((unsigned int)a, a_scalar.UInt());
    ASSERT_EQ((signed long)a, a_scalar.SLong());
    ASSERT_EQ((unsigned long)a, a_scalar.ULong());
    ASSERT_EQ((signed long long)a, a_scalar.SLongLong());
    ASSERT_EQ((unsigned long long)a, a_scalar.ULongLong());
}

TEST(ScalarTest, ExtractBitfield)
{
    uint32_t len = sizeof(long long) * 8;

    long long a1 = 0xf1f2f3f4f5f6f7f8LL;
    long long b1 = 0xff1f2f3f4f5f6f7fLL;
    Scalar s_scalar(a1);
    ASSERT_TRUE(s_scalar.ExtractBitfield(0, 0));
    ASSERT_EQ(0, memcmp(&a1, s_scalar.GetBytes(), sizeof(a1)));
    ASSERT_TRUE(s_scalar.ExtractBitfield(len, 0));
    ASSERT_EQ(0, memcmp(&a1, s_scalar.GetBytes(), sizeof(a1)));
    ASSERT_TRUE(s_scalar.ExtractBitfield(len - 4, 4));
    ASSERT_EQ(0, memcmp(&b1, s_scalar.GetBytes(), sizeof(b1)));

    unsigned long long a2 = 0xf1f2f3f4f5f6f7f8ULL;
    unsigned long long b2 = 0x0f1f2f3f4f5f6f7fULL;
    Scalar u_scalar(a2);
    ASSERT_TRUE(u_scalar.ExtractBitfield(0, 0));
    ASSERT_EQ(0, memcmp(&a2, u_scalar.GetBytes(), sizeof(a2)));
    ASSERT_TRUE(u_scalar.ExtractBitfield(len, 0));
    ASSERT_EQ(0, memcmp(&a2, u_scalar.GetBytes(), sizeof(a2)));
    ASSERT_TRUE(u_scalar.ExtractBitfield(len - 4, 4));
    ASSERT_EQ(0, memcmp(&b2, u_scalar.GetBytes(), sizeof(b2)));
}