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Diffstat (limited to 'src/processor/static_range_map_unittest.cc')
| -rw-r--r-- | src/processor/static_range_map_unittest.cc | 427 |
1 files changed, 427 insertions, 0 deletions
diff --git a/src/processor/static_range_map_unittest.cc b/src/processor/static_range_map_unittest.cc new file mode 100644 index 00000000..d4163e28 --- /dev/null +++ b/src/processor/static_range_map_unittest.cc @@ -0,0 +1,427 @@ +// Copyright (c) 2010 Google Inc. +// All rights reserved. +// +// 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 Google Inc. 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. + +// static_range_map_unittest.cc: Unit tests for StaticRangeMap. +// +// Author: Siyang Xie (lambxsy@google.com) + +#include "breakpad_googletest_includes.h" +#include "processor/range_map-inl.h" +#include "processor/static_range_map-inl.h" +#include "processor/simple_serializer-inl.h" +#include "processor/map_serializers-inl.h" + +#include "processor/logging.h" +#include "processor/scoped_ptr.h" + +using google_breakpad::StaticRangeMap; +using google_breakpad::RangeMap; + +// Types used for testing. +typedef int AddressType; +typedef int EntryType; +typedef StaticRangeMap< AddressType, EntryType > TestMap; +typedef RangeMap< AddressType, EntryType > RMap; + +// RangeTest contains data to use for store and retrieve tests. See +// RunTests for descriptions of the tests. +struct RangeTest { + // Base address to use for test + AddressType address; + + // Size of range to use for test + AddressType size; + + // Unique ID of range - unstorable ranges must have unique IDs too + EntryType id; + + // Whether this range is expected to be stored successfully or not + bool expect_storable; +}; + +// A RangeTestSet encompasses multiple RangeTests, which are run in +// sequence on the same RangeMap. +struct RangeTestSet { + // An array of RangeTests + const RangeTest* range_tests; + + // The number of tests in the set + unsigned int range_test_count; +}; + +namespace { + // These tests will be run sequentially. The first set of tests exercises + // most functions of RangeTest, and verifies all of the bounds-checking. + const RangeTest range_tests_0[] = { + { INT_MIN, 16, 1, true }, // lowest possible range + { -2, 5, 2, true }, // a range through zero + { INT_MAX - 9, 11, 3, false }, // tests anti-overflow + { INT_MAX - 9, 10, 4, true }, // highest possible range + { 5, 0, 5, false }, // tests anti-zero-size + { 5, 1, 6, true }, // smallest possible range + { -20, 15, 7, true }, // entirely negative + + { 10, 10, 10, true }, // causes the following tests to fail + { 9, 10, 11, false }, // one-less base, one-less high + { 9, 11, 12, false }, // one-less base, identical high + { 9, 12, 13, false }, // completely contains existing + { 10, 9, 14, false }, // identical base, one-less high + { 10, 10, 15, false }, // exactly identical to existing range + { 10, 11, 16, false }, // identical base, one-greater high + { 11, 8, 17, false }, // contained completely within + { 11, 9, 18, false }, // one-greater base, identical high + { 11, 10, 19, false }, // one-greater base, one-greater high + { 9, 2, 20, false }, // overlaps bottom by one + { 10, 1, 21, false }, // overlaps bottom by one, contained + { 19, 1, 22, false }, // overlaps top by one, contained + { 19, 2, 23, false }, // overlaps top by one + + { 9, 1, 24, true }, // directly below without overlap + { 20, 1, 25, true }, // directly above without overlap + + { 6, 3, 26, true }, // exactly between two ranges, gapless + { 7, 3, 27, false }, // tries to span two ranges + { 7, 5, 28, false }, // tries to span three ranges + { 4, 20, 29, false }, // tries to contain several ranges + + { 30, 50, 30, true }, + { 90, 25, 31, true }, + { 35, 65, 32, false }, // tries to span two noncontiguous + { 120, 10000, 33, true }, // > 8-bit + { 20000, 20000, 34, true }, // > 8-bit + { 0x10001, 0x10001, 35, true }, // > 16-bit + + { 27, -1, 36, false } // tests high < base + }; + + // Attempt to fill the entire space. The entire space must be filled with + // three stores because AddressType is signed for these tests, so RangeMap + // treats the size as signed and rejects sizes that appear to be negative. + // Even if these tests were run as unsigned, two stores would be needed + // to fill the space because the entire size of the space could only be + // described by using one more bit than would be present in AddressType. + const RangeTest range_tests_1[] = { + { INT_MIN, INT_MAX, 50, true }, // From INT_MIN to -2, inclusive + { -1, 2, 51, true }, // From -1 to 0, inclusive + { 1, INT_MAX, 52, true }, // From 1 to INT_MAX, inclusive + { INT_MIN, INT_MAX, 53, false }, // Can't fill the space twice + { -1, 2, 54, false }, + { 1, INT_MAX, 55, false }, + { -3, 6, 56, false }, // -3 to 2, inclusive - spans 3 ranges + }; + + // A light round of testing to verify that RetrieveRange does the right + // the right thing at the extremities of the range when nothing is stored + // there. Checks are forced without storing anything at the extremities + // by setting size = 0. + const RangeTest range_tests_2[] = { + { INT_MIN, 0, 100, false }, // makes RetrieveRange check low end + { -1, 3, 101, true }, + { INT_MAX, 0, 102, false }, // makes RetrieveRange check high end + }; + + // Similar to the previous test set, but with a couple of ranges closer + // to the extremities. + const RangeTest range_tests_3[] = { + { INT_MIN + 1, 1, 110, true }, + { INT_MAX - 1, 1, 111, true }, + { INT_MIN, 0, 112, false }, // makes RetrieveRange check low end + { INT_MAX, 0, 113, false } // makes RetrieveRange check high end + }; + + // The range map is cleared between sets of tests listed here. + const RangeTestSet range_test_sets[] = { + { range_tests_0, sizeof(range_tests_0) / sizeof(RangeTest) }, + { range_tests_1, sizeof(range_tests_1) / sizeof(RangeTest) }, + { range_tests_2, sizeof(range_tests_2) / sizeof(RangeTest) }, + { range_tests_3, sizeof(range_tests_3) / sizeof(RangeTest) }, + { range_tests_0, sizeof(range_tests_0) / sizeof(RangeTest) } // Run again + }; +} + +class TestStaticRangeMap : public ::testing::Test { + protected: + void SetUp() { + kTestCasesCount_ = sizeof(range_test_sets) / sizeof(RangeTestSet); + } + + // StoreTest uses the data in a RangeTest and calls StoreRange on the + // test RangeMap. It returns true if the expected result occurred, and + // false if something else happened. + void StoreTest(RMap* range_map, const RangeTest* range_test); + + // RetrieveTest uses the data in RangeTest and calls RetrieveRange on the + // test RangeMap. If it retrieves the expected value (which can be no + // map entry at the specified range,) it returns true, otherwise, it returns + // false. RetrieveTest will check the values around the base address and + // the high address of a range to guard against off-by-one errors. + void RetrieveTest(TestMap* range_map, const RangeTest* range_test); + + // Test RetrieveRangeAtIndex, which is supposed to return objects in order + // according to their addresses. This test is performed by looping through + // the map, calling RetrieveRangeAtIndex for all possible indices in sequence, + // and verifying that each call returns a different object than the previous + // call, and that ranges are returned with increasing base addresses. Returns + // false if the test fails. + void RetrieveIndexTest(const TestMap* range_map, int set); + + void RunTestCase(int test_case); + + unsigned int kTestCasesCount_; + google_breakpad::RangeMapSerializer<AddressType, EntryType> serializer_; +}; + +void TestStaticRangeMap::StoreTest(RMap* range_map, + const RangeTest* range_test) { + bool stored = range_map->StoreRange(range_test->address, + range_test->size, + range_test->id); + EXPECT_EQ(stored, range_test->expect_storable) + << "StoreRange id " << range_test->id << "FAILED"; +} + +void TestStaticRangeMap::RetrieveTest(TestMap* range_map, + const RangeTest* range_test) { + for (unsigned int side = 0; side <= 1; ++side) { + // When side == 0, check the low side (base address) of each range. + // When side == 1, check the high side (base + size) of each range. + + // Check one-less and one-greater than the target address in addition + // to the target address itself. + + // If the size of the range is only 1, don't check one greater than + // the base or one less than the high - for a successfully stored + // range, these tests would erroneously fail because the range is too + // small. + AddressType low_offset = -1; + AddressType high_offset = 1; + if (range_test->size == 1) { + if (!side) // When checking the low side, + high_offset = 0; // don't check one over the target. + else // When checking the high side, + low_offset = 0; // don't check one under the target. + } + + for (AddressType offset = low_offset; offset <= high_offset; ++offset) { + AddressType address = + offset + + (!side ? range_test->address : + range_test->address + range_test->size - 1); + + bool expected_result = false; // This is correct for tests not stored. + if (range_test->expect_storable) { + if (offset == 0) // When checking the target address, + expected_result = true; // test should always succeed. + else if (offset == -1) // When checking one below the target, + expected_result = side; // should fail low and succeed high. + else // When checking one above the target, + expected_result = !side; // should succeed low and fail high. + } + + const EntryType* id; + AddressType retrieved_base; + AddressType retrieved_size; + bool retrieved = range_map->RetrieveRange(address, id, + &retrieved_base, + &retrieved_size); + + bool observed_result = retrieved && *id == range_test->id; + EXPECT_EQ(observed_result, expected_result) + << "RetrieveRange id " << range_test->id + << ", side " << side << ", offset " << offset << " FAILED."; + + // If a range was successfully retrieved, check that the returned + // bounds match the range as stored. + if (observed_result == true) { + EXPECT_EQ(retrieved_base, range_test->address) + << "RetrieveRange id " << range_test->id + << ", side " << side << ", offset " << offset << " FAILED."; + EXPECT_EQ(retrieved_size, range_test->size) + << "RetrieveRange id " << range_test->id + << ", side " << side << ", offset " << offset << " FAILED."; + } + + // Now, check RetrieveNearestRange. The nearest range is always + // expected to be different from the test range when checking one + // less than the low side. + bool expected_nearest = range_test->expect_storable; + if (!side && offset < 0) + expected_nearest = false; + + AddressType nearest_base; + AddressType nearest_size; + bool retrieved_nearest = range_map->RetrieveNearestRange(address, + id, + &nearest_base, + &nearest_size); + + // When checking one greater than the high side, RetrieveNearestRange + // should usually return the test range. When a different range begins + // at that address, though, then RetrieveNearestRange should return the + // range at the address instead of the test range. + if (side && offset > 0 && nearest_base == address) { + expected_nearest = false; + } + + bool observed_nearest = retrieved_nearest && + *id == range_test->id; + + EXPECT_EQ(observed_nearest, expected_nearest) + << "RetrieveRange id " << range_test->id + << ", side " << side << ", offset " << offset << " FAILED."; + + // If a range was successfully retrieved, check that the returned + // bounds match the range as stored. + if (expected_nearest ==true) { + EXPECT_EQ(nearest_base, range_test->address) + << "RetrieveRange id " << range_test->id + << ", side " << side << ", offset " << offset << " FAILED."; + EXPECT_EQ(nearest_size, range_test->size) + << "RetrieveRange id " << range_test->id + << ", side " << side << ", offset " << offset << " FAILED."; + } + } + } +} + +void TestStaticRangeMap::RetrieveIndexTest(const TestMap* range_map, int set) { + AddressType last_base = 0; + const EntryType* last_entry = 0; + const EntryType* entry; + int object_count = range_map->GetCount(); + for (int object_index = 0; object_index < object_count; ++object_index) { + AddressType base; + ASSERT_TRUE(range_map->RetrieveRangeAtIndex(object_index, + entry, + &base, + NULL)) + << "FAILED: RetrieveRangeAtIndex set " << set + << " index " << object_index; + + ASSERT_TRUE(entry) << "FAILED: RetrieveRangeAtIndex set " << set + << " index " << object_index; + + // It's impossible to do these comparisons unless there's a previous + // object to compare against. + if (last_entry) { + // The object must be different from the last_entry one. + EXPECT_NE(*entry, *last_entry) << "FAILED: RetrieveRangeAtIndex set " + << set << " index " << object_index; + // Each object must have a base greater than the previous object's base. + EXPECT_GT(base, last_base) << "FAILED: RetrieveRangeAtIndex set " << set + << " index " << object_index; + } + last_entry = entry; + last_base = base; + } + + // Make sure that RetrieveRangeAtIndex doesn't allow lookups at indices that + // are too high. + ASSERT_FALSE(range_map->RetrieveRangeAtIndex( + object_count, entry, NULL, NULL)) << "FAILED: RetrieveRangeAtIndex set " + << set << " index " << object_count + << " (too large)"; +} + +// RunTests runs a series of test sets. +void TestStaticRangeMap::RunTestCase(int test_case) { + // Maintain the range map in a pointer so that deletion can be meaningfully + // tested. + RMap* rmap = new RMap(); + + const RangeTest* range_tests = range_test_sets[test_case].range_tests; + unsigned int range_test_count = range_test_sets[test_case].range_test_count; + + // Run the StoreRange test, which validates StoreRange and initializes + // the RangeMap with data for the RetrieveRange test. + int stored_count = 0; // The number of ranges successfully stored + for (unsigned int range_test_index = 0; + range_test_index < range_test_count; + ++range_test_index) { + const RangeTest* range_test = &range_tests[range_test_index]; + StoreTest(rmap, range_test); + + if (range_test->expect_storable) + ++stored_count; + } + + char *memaddr = serializer_.Serialize(*rmap, NULL); + TestMap* static_range_map = new TestMap(memaddr); + + // The RangeMap's own count of objects should also match. + EXPECT_EQ(static_range_map->GetCount(), stored_count); + + // Run the RetrieveRange test + for (unsigned int range_test_index = 0; + range_test_index < range_test_count; + ++range_test_index) { + const RangeTest* range_test = &range_tests[range_test_index]; + RetrieveTest(static_range_map, range_test); + } + + RetrieveIndexTest(static_range_map, test_case); + + // Clear the map between test sets. If this is the final test set, + // delete the map instead to test destruction. + delete memaddr; + delete static_range_map; + rmap->Clear(); + delete rmap; +} + +TEST_F(TestStaticRangeMap, TestCase0) { + int test_case = 0; + RunTestCase(test_case); +} + +TEST_F(TestStaticRangeMap, TestCase1) { + int test_case = 1; + RunTestCase(test_case); +} + +TEST_F(TestStaticRangeMap, TestCase2) { + int test_case = 2; + RunTestCase(test_case); +} + +TEST_F(TestStaticRangeMap, TestCase3) { + int test_case = 3; + RunTestCase(test_case); +} + +TEST_F(TestStaticRangeMap, RunTestCase0Again) { + int test_case = 0; + RunTestCase(test_case); +} + +int main(int argc, char *argv[]) { + ::testing::InitGoogleTest(&argc, argv); + + return RUN_ALL_TESTS(); +} |