//===-- PythonDataObjectsTests.cpp ------------------------------*- C++ -*-===//
//
//                     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/ADT/STLExtras.h"
#include "llvm/Config/config.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"

#include "lldb/Core/Address.h"
#include "lldb/Core/ArchSpec.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Host/FileSpec.h"
#include "lldb/Host/HostInfo.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Symbol/LineTable.h"
#include "lldb/Symbol/SymbolVendor.h"

#include "Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.h"
#include "Plugins/SymbolFile/DWARF/SymbolFileDWARF.h"
#include "Plugins/SymbolFile/PDB/SymbolFilePDB.h"

#if defined(_MSC_VER)
#include <objbase.h>
#endif

extern const char *TestMainArgv0;

using namespace lldb_private;

class SymbolFilePDBTests : public testing::Test
{
public:
    void
    SetUp() override
    {
#if defined(_MSC_VER)
        ::CoInitializeEx(nullptr, COINIT_MULTITHREADED);
#endif

        HostInfoBase::Initialize();
        ObjectFilePECOFF::Initialize();
        SymbolFileDWARF::Initialize();
        SymbolFilePDB::Initialize();

        llvm::StringRef exe_folder = llvm::sys::path::parent_path(TestMainArgv0);
        llvm::SmallString<128> inputs_folder = exe_folder;
        llvm::sys::path::append(inputs_folder, "Inputs");

        m_pdb_test_exe = inputs_folder;
        m_dwarf_test_exe = inputs_folder;
        llvm::sys::path::append(m_pdb_test_exe, "test-pdb.exe");
        llvm::sys::path::append(m_dwarf_test_exe, "test-dwarf.exe");
    }

    void
    TearDown() override
    {
#if defined(_MSC_VER)
        ::CoUninitialize();
#endif
        SymbolFilePDB::Terminate();
        SymbolFileDWARF::Terminate();
        ObjectFilePECOFF::Terminate();
    }

protected:
    llvm::SmallString<128> m_pdb_test_exe;
    llvm::SmallString<128> m_dwarf_test_exe;

    bool
    FileSpecMatchesAsBaseOrFull(const FileSpec &left, const FileSpec &right) const
    {
        // If the filenames don't match, the paths can't be equal
        if (!left.FileEquals(right))
            return false;
        // If BOTH have a directory, also compare the directories.
        if (left.GetDirectory() && right.GetDirectory())
            return left.DirectoryEquals(right);

        // If one has a directory but not the other, they match.
        return true;
    }

    void
    VerifyLineEntry(lldb::ModuleSP module, const SymbolContext &sc, const FileSpec &spec, LineTable &lt, uint32_t line,
                    lldb::addr_t addr)
    {
        LineEntry entry;
        Address address;
        EXPECT_TRUE(module->ResolveFileAddress(addr, address));

        EXPECT_TRUE(lt.FindLineEntryByAddress(address, entry));
        EXPECT_EQ(line, entry.line);
        EXPECT_EQ(address, entry.range.GetBaseAddress());

        EXPECT_TRUE(FileSpecMatchesAsBaseOrFull(spec, entry.file));
    }

    bool
    ContainsCompileUnit(const SymbolContextList &sc_list, const FileSpec &spec) const
    {
        for (size_t i = 0; i < sc_list.GetSize(); ++i)
        {
            const SymbolContext &sc = sc_list[i];
            if (FileSpecMatchesAsBaseOrFull(*sc.comp_unit, spec))
                return true;
        }
        return false;
    }
};

#if defined(HAVE_DIA_SDK)
#define REQUIRES_DIA_SDK(TestName) TestName
#else
#define REQUIRES_DIA_SDK(TestName) DISABLED_##TestName
#endif

TEST_F(SymbolFilePDBTests, TestAbilitiesForDWARF)
{
    // Test that when we have Dwarf debug info, SymbolFileDWARF is used.
    FileSpec fspec(m_dwarf_test_exe.c_str(), false);
    ArchSpec aspec("i686-pc-windows");
    lldb::ModuleSP module = std::make_shared<Module>(fspec, aspec);

    SymbolVendor *plugin = module->GetSymbolVendor();
    EXPECT_NE(nullptr, plugin);
    SymbolFile *symfile = plugin->GetSymbolFile();
    EXPECT_NE(nullptr, symfile);
    EXPECT_EQ(symfile->GetPluginName(), SymbolFileDWARF::GetPluginNameStatic());

    uint32_t expected_abilities = SymbolFile::kAllAbilities;
    EXPECT_EQ(expected_abilities, symfile->CalculateAbilities());
}

TEST_F(SymbolFilePDBTests, REQUIRES_DIA_SDK(TestAbilitiesForPDB))
{
    // Test that when we have PDB debug info, SymbolFilePDB is used.
    FileSpec fspec(m_pdb_test_exe.c_str(), false);
    ArchSpec aspec("i686-pc-windows");
    lldb::ModuleSP module = std::make_shared<Module>(fspec, aspec);

    SymbolVendor *plugin = module->GetSymbolVendor();
    EXPECT_NE(nullptr, plugin);
    SymbolFile *symfile = plugin->GetSymbolFile();
    EXPECT_NE(nullptr, symfile);
    EXPECT_EQ(symfile->GetPluginName(), SymbolFilePDB::GetPluginNameStatic());

    uint32_t expected_abilities = SymbolFile::CompileUnits | SymbolFile::LineTables;
    EXPECT_EQ(expected_abilities, symfile->CalculateAbilities());
}

TEST_F(SymbolFilePDBTests, REQUIRES_DIA_SDK(TestResolveSymbolContextBasename))
{
    // Test that attempting to call ResolveSymbolContext with only a basename finds all full paths
    // with the same basename
    FileSpec fspec(m_pdb_test_exe.c_str(), false);
    ArchSpec aspec("i686-pc-windows");
    lldb::ModuleSP module = std::make_shared<Module>(fspec, aspec);

    SymbolVendor *plugin = module->GetSymbolVendor();
    EXPECT_NE(nullptr, plugin);
    SymbolFile *symfile = plugin->GetSymbolFile();

    FileSpec header_spec("test-pdb.cpp", false);
    SymbolContextList sc_list;
    uint32_t result_count = symfile->ResolveSymbolContext(header_spec, 0, false, lldb::eSymbolContextCompUnit, sc_list);
    EXPECT_EQ(1u, result_count);
    EXPECT_TRUE(ContainsCompileUnit(sc_list, header_spec));
}

TEST_F(SymbolFilePDBTests, REQUIRES_DIA_SDK(TestResolveSymbolContextFullPath))
{
    // Test that attempting to call ResolveSymbolContext with a full path only finds the one source
    // file that matches the full path.
    FileSpec fspec(m_pdb_test_exe.c_str(), false);
    ArchSpec aspec("i686-pc-windows");
    lldb::ModuleSP module = std::make_shared<Module>(fspec, aspec);

    SymbolVendor *plugin = module->GetSymbolVendor();
    EXPECT_NE(nullptr, plugin);
    SymbolFile *symfile = plugin->GetSymbolFile();

    FileSpec header_spec(R"spec(D:\src\llvm\tools\lldb\unittests\SymbolFile\PDB\Inputs\test-pdb.cpp)spec", false);
    SymbolContextList sc_list;
    uint32_t result_count = symfile->ResolveSymbolContext(header_spec, 0, false, lldb::eSymbolContextCompUnit, sc_list);
    EXPECT_GE(1u, result_count);
    EXPECT_TRUE(ContainsCompileUnit(sc_list, header_spec));
}

TEST_F(SymbolFilePDBTests, REQUIRES_DIA_SDK(TestLookupOfHeaderFileWithInlines))
{
    // Test that when looking up a header file via ResolveSymbolContext (i.e. a file that was not by itself
    // compiled, but only contributes to the combined code of other source files), a SymbolContext is returned
    // for each compiland which has line contributions from the requested header.
    FileSpec fspec(m_pdb_test_exe.c_str(), false);
    ArchSpec aspec("i686-pc-windows");
    lldb::ModuleSP module = std::make_shared<Module>(fspec, aspec);

    SymbolVendor *plugin = module->GetSymbolVendor();
    EXPECT_NE(nullptr, plugin);
    SymbolFile *symfile = plugin->GetSymbolFile();

    FileSpec header_specs[] = {FileSpec("test-pdb.h", false), FileSpec("test-pdb-nested.h", false)};
    FileSpec main_cpp_spec("test-pdb.cpp", false);
    FileSpec alt_cpp_spec("test-pdb-alt.cpp", false);
    for (const auto &hspec : header_specs)
    {
        SymbolContextList sc_list;
        uint32_t result_count = symfile->ResolveSymbolContext(hspec, 0, true, lldb::eSymbolContextCompUnit, sc_list);
        EXPECT_EQ(2u, result_count);
        EXPECT_TRUE(ContainsCompileUnit(sc_list, main_cpp_spec));
        EXPECT_TRUE(ContainsCompileUnit(sc_list, alt_cpp_spec));
    }
}

TEST_F(SymbolFilePDBTests, REQUIRES_DIA_SDK(TestLookupOfHeaderFileWithNoInlines))
{
    // Test that when looking up a header file via ResolveSymbolContext (i.e. a file that was not by itself
    // compiled, but only contributes to the combined code of other source files), that if check_inlines
    // is false, no SymbolContexts are returned.
    FileSpec fspec(m_pdb_test_exe.c_str(), false);
    ArchSpec aspec("i686-pc-windows");
    lldb::ModuleSP module = std::make_shared<Module>(fspec, aspec);

    SymbolVendor *plugin = module->GetSymbolVendor();
    EXPECT_NE(nullptr, plugin);
    SymbolFile *symfile = plugin->GetSymbolFile();

    FileSpec header_specs[] = {FileSpec("test-pdb.h", false), FileSpec("test-pdb-nested.h", false)};
    for (const auto &hspec : header_specs)
    {
        SymbolContextList sc_list;
        uint32_t result_count = symfile->ResolveSymbolContext(hspec, 0, false, lldb::eSymbolContextCompUnit, sc_list);
        EXPECT_EQ(0u, result_count);
    }
}

TEST_F(SymbolFilePDBTests, REQUIRES_DIA_SDK(TestLineTablesMatchAll))
{
    // Test that when calling ResolveSymbolContext with a line number of 0, all line entries from
    // the specified files are returned.
    FileSpec fspec(m_pdb_test_exe.c_str(), false);
    ArchSpec aspec("i686-pc-windows");
    lldb::ModuleSP module = std::make_shared<Module>(fspec, aspec);

    SymbolVendor *plugin = module->GetSymbolVendor();
    SymbolFile *symfile = plugin->GetSymbolFile();

    FileSpec source_file("test-pdb.cpp", false);
    FileSpec header1("test-pdb.h", false);
    FileSpec header2("test-pdb-nested.h", false);
    uint32_t cus = symfile->GetNumCompileUnits();
    EXPECT_EQ(2u, cus);

    SymbolContextList sc_list;
    uint32_t scope = lldb::eSymbolContextCompUnit | lldb::eSymbolContextLineEntry;

    uint32_t count = symfile->ResolveSymbolContext(source_file, 0, true, scope, sc_list);
    EXPECT_EQ(1u, count);
    SymbolContext sc;
    EXPECT_TRUE(sc_list.GetContextAtIndex(0, sc));

    LineTable *lt = sc.comp_unit->GetLineTable();
    EXPECT_NE(nullptr, lt);
    count = lt->GetSize();
    // We expect one extra entry for termination (per function)
    EXPECT_EQ(16u, count);

    VerifyLineEntry(module, sc, source_file, *lt, 7, 0x401040);
    VerifyLineEntry(module, sc, source_file, *lt, 8, 0x401043);
    VerifyLineEntry(module, sc, source_file, *lt, 9, 0x401045);

    VerifyLineEntry(module, sc, source_file, *lt, 13, 0x401050);
    VerifyLineEntry(module, sc, source_file, *lt, 14, 0x401054);
    VerifyLineEntry(module, sc, source_file, *lt, 15, 0x401070);

    VerifyLineEntry(module, sc, header1, *lt, 9, 0x401090);
    VerifyLineEntry(module, sc, header1, *lt, 10, 0x401093);
    VerifyLineEntry(module, sc, header1, *lt, 11, 0x4010a2);

    VerifyLineEntry(module, sc, header2, *lt, 5, 0x401080);
    VerifyLineEntry(module, sc, header2, *lt, 6, 0x401083);
    VerifyLineEntry(module, sc, header2, *lt, 7, 0x401089);
}

TEST_F(SymbolFilePDBTests, REQUIRES_DIA_SDK(TestLineTablesMatchSpecific))
{
    // Test that when calling ResolveSymbolContext with a specific line number, only line entries
    // which match the requested line are returned.
    FileSpec fspec(m_pdb_test_exe.c_str(), false);
    ArchSpec aspec("i686-pc-windows");
    lldb::ModuleSP module = std::make_shared<Module>(fspec, aspec);

    SymbolVendor *plugin = module->GetSymbolVendor();
    SymbolFile *symfile = plugin->GetSymbolFile();

    FileSpec source_file("test-pdb.cpp", false);
    FileSpec header1("test-pdb.h", false);
    FileSpec header2("test-pdb-nested.h", false);
    uint32_t cus = symfile->GetNumCompileUnits();
    EXPECT_EQ(2u, cus);

    SymbolContextList sc_list;
    uint32_t scope = lldb::eSymbolContextCompUnit | lldb::eSymbolContextLineEntry;

    // First test with line 7, and verify that only line 7 entries are added.
    uint32_t count = symfile->ResolveSymbolContext(source_file, 7, true, scope, sc_list);
    EXPECT_EQ(1u, count);
    SymbolContext sc;
    EXPECT_TRUE(sc_list.GetContextAtIndex(0, sc));

    LineTable *lt = sc.comp_unit->GetLineTable();
    EXPECT_NE(nullptr, lt);
    count = lt->GetSize();
    // We expect one extra entry for termination
    EXPECT_EQ(3u, count);

    VerifyLineEntry(module, sc, source_file, *lt, 7, 0x401040);
    VerifyLineEntry(module, sc, header2, *lt, 7, 0x401089);

    sc_list.Clear();
    // Then test with line 9, and verify that only line 9 entries are added.
    count = symfile->ResolveSymbolContext(source_file, 9, true, scope, sc_list);
    EXPECT_EQ(1u, count);
    EXPECT_TRUE(sc_list.GetContextAtIndex(0, sc));

    lt = sc.comp_unit->GetLineTable();
    EXPECT_NE(nullptr, lt);
    count = lt->GetSize();
    // We expect one extra entry for termination
    EXPECT_EQ(3u, count);

    VerifyLineEntry(module, sc, source_file, *lt, 9, 0x401045);
    VerifyLineEntry(module, sc, header1, *lt, 9, 0x401090);
}