//===-- GDBRemoteCommunicationClientTest.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 <future>

#include "GDBRemoteTestUtils.h"
#include "gtest/gtest.h"

#include "Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.h"

using namespace lldb_private::process_gdb_remote;
using namespace lldb_private;
using namespace lldb;

namespace
{

typedef GDBRemoteCommunication::PacketResult PacketResult;

struct TestClient : public GDBRemoteCommunicationClient
{
    TestClient() { m_send_acks = false; }
};

void
Handle_QThreadSuffixSupported(MockServer &server, bool supported)
{
    StringExtractorGDBRemote request;
    ASSERT_EQ(PacketResult::Success, server.GetPacket(request));
    ASSERT_EQ("QThreadSuffixSupported", request.GetStringRef());
    if (supported)
        ASSERT_EQ(PacketResult::Success, server.SendOKResponse());
    else
        ASSERT_EQ(PacketResult::Success, server.SendUnimplementedResponse(nullptr));
}

void
HandlePacket(MockServer &server, llvm::StringRef expected, llvm::StringRef response)
{
    StringExtractorGDBRemote request;
    ASSERT_EQ(PacketResult::Success, server.GetPacket(request));
    ASSERT_EQ(expected, request.GetStringRef());
    ASSERT_EQ(PacketResult::Success, server.SendPacket(response));
}

const char all_registers[] = "404142434445464748494a4b4c4d4e4f";

} // end anonymous namespace

class GDBRemoteCommunicationClientTest : public GDBRemoteTest
{
};

TEST_F(GDBRemoteCommunicationClientTest, WriteRegister)
{
    TestClient client;
    MockServer server;
    Connect(client, server);
    if (HasFailure())
        return;

    const lldb::tid_t tid = 0x47;
    const uint32_t reg_num = 4;
    std::future<bool> write_result =
        std::async(std::launch::async, [&] { return client.WriteRegister(tid, reg_num, "ABCD"); });

    Handle_QThreadSuffixSupported(server, true);

    HandlePacket(server, "P4=41424344;thread:0047;", "OK");
    ASSERT_TRUE(write_result.get());

    write_result = std::async(std::launch::async, [&] { return client.WriteAllRegisters(tid, all_registers); });

    HandlePacket(server, std::string("G") + all_registers + ";thread:0047;", "OK");
    ASSERT_TRUE(write_result.get());
}

TEST_F(GDBRemoteCommunicationClientTest, WriteRegisterNoSuffix)
{
    TestClient client;
    MockServer server;
    Connect(client, server);
    if (HasFailure())
        return;

    const lldb::tid_t tid = 0x47;
    const uint32_t reg_num = 4;
    std::future<bool> write_result =
        std::async(std::launch::async, [&] { return client.WriteRegister(tid, reg_num, "ABCD"); });

    Handle_QThreadSuffixSupported(server, false);
    HandlePacket(server, "Hg47", "OK");
    HandlePacket(server, "P4=41424344", "OK");
    ASSERT_TRUE(write_result.get());

    write_result = std::async(std::launch::async, [&] { return client.WriteAllRegisters(tid, all_registers); });

    HandlePacket(server, std::string("G") + all_registers, "OK");
    ASSERT_TRUE(write_result.get());
}

TEST_F(GDBRemoteCommunicationClientTest, ReadRegister)
{
    TestClient client;
    MockServer server;
    Connect(client, server);
    if (HasFailure())
        return;

    const lldb::tid_t tid = 0x47;
    const uint32_t reg_num = 4;
    std::future<bool> async_result = std::async(std::launch::async, [&] { return client.GetpPacketSupported(tid); });
    Handle_QThreadSuffixSupported(server, true);
    HandlePacket(server, "p0;thread:0047;", "41424344");
    ASSERT_TRUE(async_result.get());

    StringExtractorGDBRemote response;
    async_result = std::async(std::launch::async, [&] { return client.ReadRegister(tid, reg_num, response); });
    HandlePacket(server, "p4;thread:0047;", "41424344");
    ASSERT_TRUE(async_result.get());
    ASSERT_EQ("41424344", response.GetStringRef());

    async_result = std::async(std::launch::async, [&] { return client.ReadAllRegisters(tid, response); });
    HandlePacket(server, "g;thread:0047;", all_registers);
    ASSERT_TRUE(async_result.get());
    ASSERT_EQ(all_registers, response.GetStringRef());
}

TEST_F(GDBRemoteCommunicationClientTest, SaveRestoreRegistersNoSuffix)
{
    TestClient client;
    MockServer server;
    Connect(client, server);
    if (HasFailure())
        return;

    const lldb::tid_t tid = 0x47;
    uint32_t save_id;
    std::future<bool> async_result =
        std::async(std::launch::async, [&] { return client.SaveRegisterState(tid, save_id); });
    Handle_QThreadSuffixSupported(server, false);
    HandlePacket(server, "Hg47", "OK");
    HandlePacket(server, "QSaveRegisterState", "1");
    ASSERT_TRUE(async_result.get());
    EXPECT_EQ(1u, save_id);

    async_result = std::async(std::launch::async, [&] { return client.RestoreRegisterState(tid, save_id); });
    HandlePacket(server, "QRestoreRegisterState:1", "OK");
    ASSERT_TRUE(async_result.get());
}