globals.test.cc

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/*
 * Copyright 2022 Daniel R. Carvalho
 *
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 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
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 * neither the name of the copyright holders nor the names of its
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include <gmock/gmock.h>
#include <gtest/gtest-spi.h>
#include <gtest/gtest.h>
 
#include <string>
 
#include "base/gtest/cur_tick_fake.hh"
#include "base/gtest/logging.hh"
#include "base/gtest/serialization_fixture.hh"
#include "sim/globals.hh"
 
// The version tags are declared as extern
namespace gem5
{
std::set<std::string> version_tags;
} // namespace gem5
 
using namespace gem5;
 
// Use the tick handled to manipulate the current tick
GTestTickHandler tickHandler;
 
using GlobalsSerializationFixture = SerializationFixture;
using GlobalsSerializationFixtureDeathTest = GlobalsSerializationFixture;
 
TEST_F(GlobalsSerializationFixture, Serialization)
{
    Globals globals;
    tickHandler.setCurTick(1234);
    version_tags = { "first-tag", "second-tag", "third-tag", "fourth-tag" };
 
    // Serialization
    std::ofstream cp(getCptPath());
    Serializable::ScopedCheckpointSection scs(cp, "Section1");
    globals.serialize(cp);
 
    // The checkpoint must be flushed, otherwise the file may not be up-
    // to-date and the assertions below will fail
    cp.close();
 
    // Verify the output
    std::ifstream is(getCptPath());
    assert(is.good());
    std::string str = std::string(std::istreambuf_iterator<char>(is),
        std::istreambuf_iterator<char>());
    ASSERT_THAT(str, ::testing::StrEq("\n[Section1]\ncurTick=1234\n"
        "version_tags=first-tag fourth-tag second-tag third-tag\n"));
}
 
TEST_F(GlobalsSerializationFixture, Unserialization)
{
    version_tags = { "first-tag-un", "second-tag-un", "third-tag-un",
        "fourth-tag-un" };
    simulateSerialization("\n[Section1]\ncurTick=1111\nversion_tags="
        "first-tag-un second-tag-un third-tag-un fourth-tag-un\n");
 
    Globals globals;
    CheckpointIn cp(getDirName());
    Serializable::ScopedCheckpointSection scs(cp, "Section1");
 
    gtestLogOutput.str("");
    globals.unserialize(cp);
    ASSERT_THAT(gtestLogOutput.str(), ::testing::StrEq(""));
    ASSERT_EQ(globals.unserializedCurTick, 1111);
}
 
TEST_F(GlobalsSerializationFixture, UnserializationCptNoVersionTags)
{
    version_tags = {};
    simulateSerialization("\n[Section1]\ncurTick=2222\n");
 
    // Unserialization
    Globals globals;
    CheckpointIn cp(getDirName());
    Serializable::ScopedCheckpointSection scs(cp, "Section1");
 
    gtestLogOutput.str("");
    globals.unserialize(cp);
    ASSERT_THAT(gtestLogOutput.str(),
        ::testing::HasSubstr("Checkpoint uses an old versioning scheme."));
    ASSERT_EQ(globals.unserializedCurTick, 2222);
}
 
TEST_F(GlobalsSerializationFixture, UnserializationCptMissingVersionTags)
{
    version_tags = { "first-tag-un", "second-tag-un", "third-tag-un",
        "fourth-tag-un" };
    simulateSerialization("\n[Section1]\ncurTick=3333\n"
        "version_tags=second-tag-un fourth-tag-un\n");
 
    Globals globals;
    CheckpointIn cp(getDirName());
    Serializable::ScopedCheckpointSection scs(cp, "Section1");
 
    gtestLogOutput.str("");
    globals.unserialize(cp);
    ASSERT_THAT(gtestLogOutput.str(), ::testing::HasSubstr(
        "warn:   first-tag-un\nwarn:   third-tag-un\n"));
    ASSERT_EQ(globals.unserializedCurTick, 3333);
}
 
TEST_F(GlobalsSerializationFixture, UnserializationGem5MissingVersionTags)
{
    version_tags = { "first-tag-un", "second-tag-un", "third-tag-un" };
    simulateSerialization("\n[Section1]\ncurTick=4444\nversion_tags="
        "first-tag-un second-tag-un third-tag-un fourth-tag-un\n");
 
    Globals globals;
    CheckpointIn cp(getDirName());
    Serializable::ScopedCheckpointSection scs(cp, "Section1");
 
    gtestLogOutput.str("");
    globals.unserialize(cp);
    ASSERT_THAT(gtestLogOutput.str(),
        ::testing::HasSubstr("warn:   fourth-tag-un\n"));
    ASSERT_EQ(globals.unserializedCurTick, 4444);
}
 
TEST_F(GlobalsSerializationFixtureDeathTest, UnserializationCptNoCurTick)
{
    simulateSerialization("\n[Section1]\n");
 
    Globals globals;
    CheckpointIn cp(getDirName());
    Serializable::ScopedCheckpointSection scs(cp, "Section1");
    ASSERT_ANY_THROW(globals.unserialize(cp));
}