src/mem/translation_gen.test.cc - public/gem5 - Git at Google

 /*
  * Copyright 2021 Google, Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * 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
  * notice, this list of conditions and the following disclaimer in the
  * documentation and/or other materials provided with the distribution;
  * neither the name of the copyright holders nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #include <gmock/gmock.h>
 #include <gtest/gtest.h>

 #include <initializer_list>
 #include <list>
 #include <memory>
 #include <vector>

 #include "base/cprintf.hh"
 #include "base/gtest/logging.hh"
 #include "mem/translation_gen.hh"

 using testing::HasSubstr;
 using testing::Pointwise;
 using namespace gem5;

 namespace gem5
 {

 // A dummy fault class so we have something to return from failed translations.
 class FaultBase {};

 } // namespace gem5

 Fault dummyFault1 = std::make_shared<gem5::FaultBase>();
 Fault dummyFault2 = std::make_shared<gem5::FaultBase>();

 std::ostream &
 operator<<(std::ostream &os, const TranslationGen::Range &range)
 {
     if (range.fault == dummyFault1)
         ccprintf(os, "%#x=>fault1", range.vaddr);
     else if (range.fault == dummyFault2)
         ccprintf(os, "%#x=>fault2", range.vaddr);
     else
         ccprintf(os, "%#x=>%#x [%#x]", range.vaddr, range.paddr, range.size);
     return os;
 }

 using RangeList = std::list<TranslationGen::Range>;

 // Compare ranges which are returned by the generator.
 MATCHER(GenRangeEq, "")
 {
     const auto &[actual, expected] = arg;
     // vaddr and fault should match no matter what.
     if (actual.vaddr != expected.vaddr || actual.fault != expected.fault)
         return false;
     if (expected.fault) {
         // If there was a fault, paddr and size don't matter.
         return true;
     } else {
         // If there was no fault, check paddr and size.
         return actual.paddr == expected.paddr && actual.size == expected.size;
     }
 }

 // Compare ranges which are sent to the translate function.
 MATCHER(TransRangeEq, "")
 {
     const auto &[actual, expected] = arg;
     // Only the vaddr and size fields are inputs to the translate function.
     return actual.vaddr == expected.vaddr && actual.size == expected.size;
 }

 class TestTranslationGen : public TranslationGen
 {
   public:
     // Results to return from the translate function, one by one.
     const std::vector<Range> results;
     // All the Ranges which were passed into translate from the generator.
     mutable RangeList args;

   private:
     // Where we are in the results vector.
     mutable std::vector<Range>::const_iterator resultPos;

   public:
     TestTranslationGen(Addr new_start, Addr new_size,
             std::initializer_list<Range> ranges={}) :
         TranslationGen(new_start, new_size), results(ranges),
         resultPos(results.begin())
     {}

     void
     translate(Range &range) const override
     {
         // First, record what range we were asked to translate.
         args.emplace_back(range);
         // Then, if we're not out of results to return...
         if (resultPos != results.end()) {
             // Record the fault we're supposed to return, if any.
             range.fault = resultPos->fault;
             if (!range.fault) {
                 // If there wasn't a fault, size and paddr are meaningful.
                 range.size = resultPos->size;
                 range.paddr = resultPos->paddr;
             }
             // Advance to the next result.
             resultPos++;
         }
     }
 };

 TEST(TranslationGen, Accessors)
 {
     TestTranslationGen gen1(0x10000, 0x20000);

     EXPECT_EQ(gen1.start(), 0x10000);
     EXPECT_EQ(gen1.size(), 0x20000);

     TestTranslationGen gen2(0x3456, 0x6543);

     EXPECT_EQ(gen2.start(), 0x3456);
     EXPECT_EQ(gen2.size(), 0x6543);
 }

 TEST(TranslationGen, BeginAndEnd)
 {
     TestTranslationGen gen1(0x10000, 0x20000);

     EXPECT_NE(gen1.begin(), gen1.end());
     EXPECT_EQ(gen1.begin(), gen1.begin());
     EXPECT_EQ(gen1.end(), gen1.end());

     TestTranslationGen gen2(0x30000, 0x40000);

     EXPECT_NE(gen1.begin(), gen2.begin());
     EXPECT_EQ(gen1.end(), gen2.end());
 }

 TEST(TranslationGen, SuccessfulTwoStep)
 {
     TestTranslationGen gen(0x10000, 0x10000, {
             // Results for translate.
             {0x0, 0x8000, 0x30000, NoFault},
             {0x0, 0x8000, 0x40000, NoFault}
     });

     RangeList range_list;
     for (const auto &range: gen)
         range_list.emplace_back(range);

     // What the generator should return.
     const RangeList expected_gen{
         {0x10000, 0x8000, 0x30000, NoFault},
         {0x18000, 0x8000, 0x40000, NoFault}
     };
     EXPECT_THAT(range_list, Pointwise(GenRangeEq(), expected_gen));

     // What the generator should have been asked to translate.
     const RangeList expected_trans{
         {0x10000, 0x10000, 0x0, NoFault},
         {0x18000, 0x8000, 0x0, NoFault}
     };
     EXPECT_THAT(gen.args, Pointwise(TransRangeEq(), expected_trans));
 }

 TEST(TranslationGen, RetryOnFault)
 {
     TestTranslationGen gen(0x10000, 0x10000, {
             // Results for translate.
             {0x0, 0x8000, 0x30000, NoFault},
             {0x0, 0x0, 0x0, dummyFault1},
             {0x0, 0x8000, 0x40000, NoFault}
     });

     RangeList range_list;
     for (const auto &range: gen)
         range_list.emplace_back(range);

     // What the generator should return.
     const RangeList expected_gen{
         {0x10000, 0x8000, 0x30000, NoFault},
         {0x18000, 0x0, 0x0, dummyFault1},
         {0x18000, 0x8000, 0x40000, NoFault}
     };
     EXPECT_THAT(range_list, Pointwise(GenRangeEq(), expected_gen));

     // What the generator should have been asked to translate.
     const RangeList expected_trans{
         {0x10000, 0x10000, 0x0, NoFault},
         {0x18000, 0x8000, 0x0, NoFault},
         {0x18000, 0x8000, 0x0, NoFault}
     };
     EXPECT_THAT(gen.args, Pointwise(TransRangeEq(), expected_trans));
 }

 TEST(TranslationGen, RetryTwiceOnFault)
 {
     TestTranslationGen gen(0x10000, 0x10000, {
             // Results for translate.
             {0x0, 0x8000, 0x30000, NoFault},
             {0x0, 0x0, 0x0, dummyFault1},
             {0x0, 0x0, 0x0, dummyFault2},
             {0x0, 0x8000, 0x40000, NoFault}
     });

     RangeList range_list;
     for (const auto &range: gen)
         range_list.emplace_back(range);

     // What the generator should return.
     const RangeList expected_gen{
         {0x10000, 0x8000, 0x30000, NoFault},
         {0x18000, 0x0, 0x0, dummyFault1},
         {0x18000, 0x0, 0x0, dummyFault2},
         {0x18000, 0x8000, 0x40000, NoFault}
     };
     EXPECT_THAT(range_list, Pointwise(GenRangeEq(), expected_gen));

     // What the generator should have been asked to translate.
     const RangeList expected_trans{
         {0x10000, 0x10000, 0x0, NoFault},
         {0x18000, 0x8000, 0x0, NoFault},
         {0x18000, 0x8000, 0x0, NoFault},
         {0x18000, 0x8000, 0x0, NoFault}
     };
     EXPECT_THAT(gen.args, Pointwise(TransRangeEq(), expected_trans));
 }

 TEST(TranslationGen, FaultAtStart)
 {
     TestTranslationGen gen(0x10000, 0x10000, {
             // Results for translate.
             {0x0, 0x0, 0x0, dummyFault1},
             {0x0, 0x8000, 0x30000, NoFault},
             {0x0, 0x8000, 0x40000, NoFault}
     });

     RangeList range_list;
     for (const auto &range: gen)
         range_list.emplace_back(range);

     // What the generator should return.
     const RangeList expected_gen{
         {0x10000, 0x0, 0x0, dummyFault1},
         {0x10000, 0x8000, 0x30000, NoFault},
         {0x18000, 0x8000, 0x40000, NoFault}
     };
     EXPECT_THAT(range_list, Pointwise(GenRangeEq(), expected_gen));

     // What the generator should have been asked to translate.
     const RangeList expected_trans{
         {0x10000, 0x10000, 0x0, NoFault},
         {0x10000, 0x10000, 0x0, NoFault},
         {0x18000, 0x8000, 0x0, NoFault}
     };
     EXPECT_THAT(gen.args, Pointwise(TransRangeEq(), expected_trans));
 }

 TEST(TranslationGen, FaultInMiddle)
 {
     TestTranslationGen gen(0x10000, 0x18000, {
             // Results for translate.
             {0x0, 0x8000, 0x30000, NoFault},
             {0x0, 0x0, 0x0, dummyFault1},
             {0x0, 0x8000, 0x40000, NoFault},
             {0x0, 0x8000, 0x50000, NoFault}
     });

     RangeList range_list;
     for (const auto &range: gen)
         range_list.emplace_back(range);

     // What the generator should return.
     const RangeList expected_gen{
         {0x10000, 0x8000, 0x30000, NoFault},
         {0x18000, 0x0, 0x0, dummyFault1},
         {0x18000, 0x8000, 0x40000, NoFault},
         {0x20000, 0x8000, 0x50000, NoFault}
     };
     EXPECT_THAT(range_list, Pointwise(GenRangeEq(), expected_gen));

     // What the generator should have been asked to translate.
     const RangeList expected_trans{
         {0x10000, 0x18000, 0x0, NoFault},
         {0x18000, 0x10000, 0x0, NoFault},
         {0x18000, 0x10000, 0x0, NoFault},
         {0x20000, 0x8000, 0x0, NoFault}
     };
     EXPECT_THAT(gen.args, Pointwise(TransRangeEq(), expected_trans));
 }

 TEST(TranslationGen, VariablePageSize)
 {
     TestTranslationGen gen(0x10000, 0x20000, {
             // Results for translate.
             {0x0, 0x8000, 0x30000, NoFault},
             {0x0, 0x10000, 0x40000, NoFault},
             {0x0, 0x8000, 0x50000, NoFault}
     });

     RangeList range_list;
     for (const auto &range: gen)
         range_list.emplace_back(range);

     // What the generator should return.
     const RangeList expected_gen{
         {0x10000, 0x8000, 0x30000, NoFault},
         {0x18000, 0x10000, 0x40000, NoFault},
         {0x28000, 0x8000, 0x50000, NoFault}
     };
     EXPECT_THAT(range_list, Pointwise(GenRangeEq(), expected_gen));

     // What the generator should have been asked to translate.
     const RangeList expected_trans{
         {0x10000, 0x20000, 0x0, NoFault},
         {0x18000, 0x18000, 0x0, NoFault},
         {0x28000, 0x8000, 0x0, NoFault}
     };
     EXPECT_THAT(gen.args, Pointwise(TransRangeEq(), expected_trans));
 }

 TEST(TranslationGenDeathTest, IncrementEndIterator)
 {
     TestTranslationGen gen(0x10000, 0x20000);
     gtestLogOutput.str("");
     ASSERT_ANY_THROW(gen.end()++);
     EXPECT_THAT(gtestLogOutput.str(),
             HasSubstr("Can't increment end iterator."));
 }
	/*
	* Copyright 2021 Google, Inc.
	*
	* Redistribution and use in source and binary forms, with or without
	* 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
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution;
	* neither the name of the copyright holders nor the names of its
	* contributors may be used to endorse or promote products derived from
	* this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#include <gmock/gmock.h>
	#include <gtest/gtest.h>

	#include <initializer_list>
	#include <list>
	#include <memory>
	#include <vector>

	#include "base/cprintf.hh"
	#include "base/gtest/logging.hh"
	#include "mem/translation_gen.hh"

	using testing::HasSubstr;
	using testing::Pointwise;
	using namespace gem5;

	namespace gem5
	{

	// A dummy fault class so we have something to return from failed translations.
	class FaultBase {};

	} // namespace gem5

	Fault dummyFault1 = std::make_shared<gem5::FaultBase>();
	Fault dummyFault2 = std::make_shared<gem5::FaultBase>();

	std::ostream &
	operator<<(std::ostream &os, const TranslationGen::Range &range)
	{
	if (range.fault == dummyFault1)
	ccprintf(os, "%#x=>fault1", range.vaddr);
	else if (range.fault == dummyFault2)
	ccprintf(os, "%#x=>fault2", range.vaddr);
	else
	ccprintf(os, "%#x=>%#x [%#x]", range.vaddr, range.paddr, range.size);
	return os;
	}

	using RangeList = std::list<TranslationGen::Range>;

	// Compare ranges which are returned by the generator.
	MATCHER(GenRangeEq, "")
	{
	const auto &[actual, expected] = arg;
	// vaddr and fault should match no matter what.
	if (actual.vaddr != expected.vaddr \|\| actual.fault != expected.fault)
	return false;
	if (expected.fault) {
	// If there was a fault, paddr and size don't matter.
	return true;
	} else {
	// If there was no fault, check paddr and size.
	return actual.paddr == expected.paddr && actual.size == expected.size;
	}
	}

	// Compare ranges which are sent to the translate function.
	MATCHER(TransRangeEq, "")
	{
	const auto &[actual, expected] = arg;
	// Only the vaddr and size fields are inputs to the translate function.
	return actual.vaddr == expected.vaddr && actual.size == expected.size;
	}

	class TestTranslationGen : public TranslationGen
	{
	public:
	// Results to return from the translate function, one by one.
	const std::vector<Range> results;
	// All the Ranges which were passed into translate from the generator.
	mutable RangeList args;

	private:
	// Where we are in the results vector.
	mutable std::vector<Range>::const_iterator resultPos;

	public:
	TestTranslationGen(Addr new_start, Addr new_size,
	std::initializer_list<Range> ranges={}) :
	TranslationGen(new_start, new_size), results(ranges),
	resultPos(results.begin())
	{}

	void
	translate(Range &range) const override
	{
	// First, record what range we were asked to translate.
	args.emplace_back(range);
	// Then, if we're not out of results to return...
	if (resultPos != results.end()) {
	// Record the fault we're supposed to return, if any.
	range.fault = resultPos->fault;
	if (!range.fault) {
	// If there wasn't a fault, size and paddr are meaningful.
	range.size = resultPos->size;
	range.paddr = resultPos->paddr;
	}
	// Advance to the next result.
	resultPos++;
	}
	}
	};

	TEST(TranslationGen, Accessors)
	{
	TestTranslationGen gen1(0x10000, 0x20000);

	EXPECT_EQ(gen1.start(), 0x10000);
	EXPECT_EQ(gen1.size(), 0x20000);

	TestTranslationGen gen2(0x3456, 0x6543);

	EXPECT_EQ(gen2.start(), 0x3456);
	EXPECT_EQ(gen2.size(), 0x6543);
	}

	TEST(TranslationGen, BeginAndEnd)
	{
	TestTranslationGen gen1(0x10000, 0x20000);

	EXPECT_NE(gen1.begin(), gen1.end());
	EXPECT_EQ(gen1.begin(), gen1.begin());
	EXPECT_EQ(gen1.end(), gen1.end());

	TestTranslationGen gen2(0x30000, 0x40000);

	EXPECT_NE(gen1.begin(), gen2.begin());
	EXPECT_EQ(gen1.end(), gen2.end());
	}

	TEST(TranslationGen, SuccessfulTwoStep)
	{
	TestTranslationGen gen(0x10000, 0x10000, {
	// Results for translate.
	{0x0, 0x8000, 0x30000, NoFault},
	{0x0, 0x8000, 0x40000, NoFault}
	});

	RangeList range_list;
	for (const auto &range: gen)
	range_list.emplace_back(range);

	// What the generator should return.
	const RangeList expected_gen{
	{0x10000, 0x8000, 0x30000, NoFault},
	{0x18000, 0x8000, 0x40000, NoFault}
	};
	EXPECT_THAT(range_list, Pointwise(GenRangeEq(), expected_gen));

	// What the generator should have been asked to translate.
	const RangeList expected_trans{
	{0x10000, 0x10000, 0x0, NoFault},
	{0x18000, 0x8000, 0x0, NoFault}
	};
	EXPECT_THAT(gen.args, Pointwise(TransRangeEq(), expected_trans));
	}

	TEST(TranslationGen, RetryOnFault)
	{
	TestTranslationGen gen(0x10000, 0x10000, {
	// Results for translate.
	{0x0, 0x8000, 0x30000, NoFault},
	{0x0, 0x0, 0x0, dummyFault1},
	{0x0, 0x8000, 0x40000, NoFault}
	});

	RangeList range_list;
	for (const auto &range: gen)
	range_list.emplace_back(range);

	// What the generator should return.
	const RangeList expected_gen{
	{0x10000, 0x8000, 0x30000, NoFault},
	{0x18000, 0x0, 0x0, dummyFault1},
	{0x18000, 0x8000, 0x40000, NoFault}
	};
	EXPECT_THAT(range_list, Pointwise(GenRangeEq(), expected_gen));

	// What the generator should have been asked to translate.
	const RangeList expected_trans{
	{0x10000, 0x10000, 0x0, NoFault},
	{0x18000, 0x8000, 0x0, NoFault},
	{0x18000, 0x8000, 0x0, NoFault}
	};
	EXPECT_THAT(gen.args, Pointwise(TransRangeEq(), expected_trans));
	}

	TEST(TranslationGen, RetryTwiceOnFault)
	{
	TestTranslationGen gen(0x10000, 0x10000, {
	// Results for translate.
	{0x0, 0x8000, 0x30000, NoFault},
	{0x0, 0x0, 0x0, dummyFault1},
	{0x0, 0x0, 0x0, dummyFault2},
	{0x0, 0x8000, 0x40000, NoFault}
	});

	RangeList range_list;
	for (const auto &range: gen)
	range_list.emplace_back(range);

	// What the generator should return.
	const RangeList expected_gen{
	{0x10000, 0x8000, 0x30000, NoFault},
	{0x18000, 0x0, 0x0, dummyFault1},
	{0x18000, 0x0, 0x0, dummyFault2},
	{0x18000, 0x8000, 0x40000, NoFault}
	};
	EXPECT_THAT(range_list, Pointwise(GenRangeEq(), expected_gen));

	// What the generator should have been asked to translate.
	const RangeList expected_trans{
	{0x10000, 0x10000, 0x0, NoFault},
	{0x18000, 0x8000, 0x0, NoFault},
	{0x18000, 0x8000, 0x0, NoFault},
	{0x18000, 0x8000, 0x0, NoFault}
	};
	EXPECT_THAT(gen.args, Pointwise(TransRangeEq(), expected_trans));
	}

	TEST(TranslationGen, FaultAtStart)
	{
	TestTranslationGen gen(0x10000, 0x10000, {
	// Results for translate.
	{0x0, 0x0, 0x0, dummyFault1},
	{0x0, 0x8000, 0x30000, NoFault},
	{0x0, 0x8000, 0x40000, NoFault}
	});

	RangeList range_list;
	for (const auto &range: gen)
	range_list.emplace_back(range);

	// What the generator should return.
	const RangeList expected_gen{
	{0x10000, 0x0, 0x0, dummyFault1},
	{0x10000, 0x8000, 0x30000, NoFault},
	{0x18000, 0x8000, 0x40000, NoFault}
	};
	EXPECT_THAT(range_list, Pointwise(GenRangeEq(), expected_gen));

	// What the generator should have been asked to translate.
	const RangeList expected_trans{
	{0x10000, 0x10000, 0x0, NoFault},
	{0x10000, 0x10000, 0x0, NoFault},
	{0x18000, 0x8000, 0x0, NoFault}
	};
	EXPECT_THAT(gen.args, Pointwise(TransRangeEq(), expected_trans));
	}

	TEST(TranslationGen, FaultInMiddle)
	{
	TestTranslationGen gen(0x10000, 0x18000, {
	// Results for translate.
	{0x0, 0x8000, 0x30000, NoFault},
	{0x0, 0x0, 0x0, dummyFault1},
	{0x0, 0x8000, 0x40000, NoFault},
	{0x0, 0x8000, 0x50000, NoFault}
	});

	RangeList range_list;
	for (const auto &range: gen)
	range_list.emplace_back(range);

	// What the generator should return.
	const RangeList expected_gen{
	{0x10000, 0x8000, 0x30000, NoFault},
	{0x18000, 0x0, 0x0, dummyFault1},
	{0x18000, 0x8000, 0x40000, NoFault},
	{0x20000, 0x8000, 0x50000, NoFault}
	};
	EXPECT_THAT(range_list, Pointwise(GenRangeEq(), expected_gen));

	// What the generator should have been asked to translate.
	const RangeList expected_trans{
	{0x10000, 0x18000, 0x0, NoFault},
	{0x18000, 0x10000, 0x0, NoFault},
	{0x18000, 0x10000, 0x0, NoFault},
	{0x20000, 0x8000, 0x0, NoFault}
	};
	EXPECT_THAT(gen.args, Pointwise(TransRangeEq(), expected_trans));
	}

	TEST(TranslationGen, VariablePageSize)
	{
	TestTranslationGen gen(0x10000, 0x20000, {
	// Results for translate.
	{0x0, 0x8000, 0x30000, NoFault},
	{0x0, 0x10000, 0x40000, NoFault},
	{0x0, 0x8000, 0x50000, NoFault}
	});

	RangeList range_list;
	for (const auto &range: gen)
	range_list.emplace_back(range);

	// What the generator should return.
	const RangeList expected_gen{
	{0x10000, 0x8000, 0x30000, NoFault},
	{0x18000, 0x10000, 0x40000, NoFault},
	{0x28000, 0x8000, 0x50000, NoFault}
	};
	EXPECT_THAT(range_list, Pointwise(GenRangeEq(), expected_gen));

	// What the generator should have been asked to translate.
	const RangeList expected_trans{
	{0x10000, 0x20000, 0x0, NoFault},
	{0x18000, 0x18000, 0x0, NoFault},
	{0x28000, 0x8000, 0x0, NoFault}
	};
	EXPECT_THAT(gen.args, Pointwise(TransRangeEq(), expected_trans));
	}

	TEST(TranslationGenDeathTest, IncrementEndIterator)
	{
	TestTranslationGen gen(0x10000, 0x20000);
	gtestLogOutput.str("");
	ASSERT_ANY_THROW(gen.end()++);
	EXPECT_THAT(gtestLogOutput.str(),
	HasSubstr("Can't increment end iterator."));
	}