| // Copyright 2013 Google Inc. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "syzygy/pe/transforms/coff_add_imports_transform.h" |
| |
| #include "gtest/gtest.h" |
| #include "syzygy/block_graph/unittest_util.h" |
| #include "syzygy/pe/pe_utils.h" |
| #include "syzygy/pe/unittest_util.h" |
| |
| namespace pe { |
| namespace transforms { |
| |
| using block_graph::BlockGraph; |
| |
| namespace { |
| |
| class CoffAddImportsTransformTest : public testing::CoffUnitTest { |
| public: |
| virtual void SetUp() OVERRIDE { |
| testing::CoffUnitTest::SetUp(); |
| } |
| |
| // Check that symbols in @p module have been assigned a reference, and that |
| // they pass through a round-trip writing and decomposition. |
| void TestSymbols(const ImportedModule& module) { |
| // Check resulting references. |
| for (size_t i = 0; i < module.size(); ++i) { |
| BlockGraph::Reference ref; |
| EXPECT_TRUE(module.GetSymbolReference(i, &ref)); |
| EXPECT_TRUE(ref.referenced() != NULL); |
| EXPECT_GE(ref.offset(), 0); |
| EXPECT_LT(ref.offset(), |
| static_cast<BlockGraph::Offset>(ref.referenced()->size())); |
| } |
| |
| ASSERT_NO_FATAL_FAILURE(TestRoundTrip()); |
| } |
| }; |
| |
| const char kFunction1Name[] = "__imp_?function1@@YAHXZ"; |
| const char kFunction3Name[] = "?function3@@YAHXZ"; |
| const char kFunction4Name[] = "?function4@@YAHXZ"; |
| const char kMemcpy[] = "_memset"; // Multiply defined. |
| |
| } // namespace |
| |
| TEST_F(CoffAddImportsTransformTest, AddImportsExisting) { |
| ASSERT_NO_FATAL_FAILURE(DecomposeOriginal()); |
| ImportedModule module("export_dll.dll"); |
| size_t function1 = module.AddSymbol(kFunction1Name, |
| ImportedModule::kAlwaysImport); |
| size_t function3 = module.AddSymbol(kFunction3Name, |
| ImportedModule::kAlwaysImport); |
| |
| CoffAddImportsTransform transform; |
| transform.AddModule(&module); |
| EXPECT_TRUE(block_graph::ApplyBlockGraphTransform( |
| &transform, &policy_, &block_graph_, headers_block_)); |
| EXPECT_EQ(0u, transform.modules_added()); |
| EXPECT_EQ(0u, transform.symbols_added()); |
| |
| EXPECT_TRUE(module.ModuleIsImported()); |
| EXPECT_TRUE(module.SymbolIsImported(function1)); |
| EXPECT_TRUE(module.SymbolIsImported(function3)); |
| |
| EXPECT_FALSE(module.ModuleWasAdded()); |
| EXPECT_FALSE(module.SymbolWasAdded(function1)); |
| EXPECT_FALSE(module.SymbolWasAdded(function3)); |
| |
| EXPECT_NO_FATAL_FAILURE(TestSymbols(module)); |
| } |
| |
| TEST_F(CoffAddImportsTransformTest, AddImportsNewSymbol) { |
| ASSERT_NO_FATAL_FAILURE(DecomposeOriginal()); |
| ImportedModule module("export_dll.dll"); |
| size_t function1 = module.AddSymbol(kFunction1Name, |
| ImportedModule::kAlwaysImport); |
| size_t function3 = module.AddSymbol(kFunction3Name, |
| ImportedModule::kAlwaysImport); |
| size_t function4 = module.AddSymbol(kFunction4Name, |
| ImportedModule::kAlwaysImport); |
| |
| CoffAddImportsTransform transform; |
| transform.AddModule(&module); |
| EXPECT_TRUE(block_graph::ApplyBlockGraphTransform( |
| &transform, &policy_, &block_graph_, headers_block_)); |
| EXPECT_EQ(0u, transform.modules_added()); |
| EXPECT_EQ(1u, transform.symbols_added()); |
| |
| EXPECT_TRUE(module.ModuleIsImported()); |
| EXPECT_TRUE(module.SymbolIsImported(function1)); |
| EXPECT_TRUE(module.SymbolIsImported(function3)); |
| EXPECT_TRUE(module.SymbolIsImported(function4)); |
| |
| EXPECT_FALSE(module.ModuleWasAdded()); |
| EXPECT_FALSE(module.SymbolWasAdded(function1)); |
| EXPECT_FALSE(module.SymbolWasAdded(function3)); |
| EXPECT_TRUE(module.SymbolWasAdded(function4)); |
| |
| EXPECT_NO_FATAL_FAILURE(TestSymbols(module)); |
| } |
| |
| TEST_F(CoffAddImportsTransformTest, FindImportsExistingMultiple) { |
| ASSERT_NO_FATAL_FAILURE(DecomposeOriginal()); |
| ImportedModule module("export_dll.dll"); |
| size_t function1 = module.AddSymbol(kFunction1Name, |
| ImportedModule::kFindOnly); |
| size_t function3 = module.AddSymbol(kFunction3Name, |
| ImportedModule::kFindOnly); |
| |
| CoffAddImportsTransform transform; |
| transform.AddModule(&module); |
| EXPECT_TRUE(block_graph::ApplyBlockGraphTransform( |
| &transform, &policy_, &block_graph_, headers_block_)); |
| EXPECT_EQ(0u, transform.modules_added()); |
| EXPECT_EQ(0u, transform.symbols_added()); |
| |
| EXPECT_TRUE(module.ModuleIsImported()); |
| EXPECT_TRUE(module.SymbolIsImported(function1)); |
| EXPECT_TRUE(module.SymbolIsImported(function3)); |
| |
| EXPECT_FALSE(module.ModuleWasAdded()); |
| EXPECT_FALSE(module.SymbolWasAdded(function1)); |
| EXPECT_FALSE(module.SymbolWasAdded(function3)); |
| } |
| |
| TEST_F(CoffAddImportsTransformTest, FindImportsNewSymbol) { |
| ASSERT_NO_FATAL_FAILURE(DecomposeOriginal()); |
| ImportedModule module("export_dll.dll"); |
| size_t function1 = module.AddSymbol(kFunction1Name, |
| ImportedModule::kFindOnly); |
| size_t function3 = module.AddSymbol(kFunction3Name, |
| ImportedModule::kFindOnly); |
| size_t function4 = module.AddSymbol(kFunction4Name, |
| ImportedModule::kFindOnly); |
| |
| CoffAddImportsTransform transform; |
| transform.AddModule(&module); |
| EXPECT_TRUE(block_graph::ApplyBlockGraphTransform( |
| &transform, &policy_, &block_graph_, headers_block_)); |
| EXPECT_EQ(0u, transform.modules_added()); |
| EXPECT_EQ(0u, transform.symbols_added()); |
| |
| EXPECT_TRUE(module.ModuleIsImported()); |
| EXPECT_TRUE(module.SymbolIsImported(function1)); |
| EXPECT_TRUE(module.SymbolIsImported(function3)); |
| EXPECT_FALSE(module.SymbolIsImported(function4)); |
| |
| EXPECT_FALSE(module.ModuleWasAdded()); |
| EXPECT_FALSE(module.SymbolWasAdded(function1)); |
| EXPECT_FALSE(module.SymbolWasAdded(function3)); |
| EXPECT_FALSE(module.SymbolWasAdded(function4)); |
| } |
| |
| TEST_F(CoffAddImportsTransformTest, EmptyStringTable) { |
| // Override with a different module. |
| test_dll_obj_path_ = testing::GetSrcRelativePath( |
| testing::kEmptyStringTableCoffName); |
| ASSERT_NO_FATAL_FAILURE(DecomposeOriginal()); |
| ImportedModule module("export_dll.dll"); |
| size_t function1 = module.AddSymbol(kFunction1Name, |
| ImportedModule::kAlwaysImport); |
| |
| CoffAddImportsTransform transform; |
| transform.AddModule(&module); |
| EXPECT_TRUE(block_graph::ApplyBlockGraphTransform( |
| &transform, &policy_, &block_graph_, headers_block_)); |
| EXPECT_EQ(0u, transform.modules_added()); |
| EXPECT_EQ(1u, transform.symbols_added()); |
| |
| EXPECT_TRUE(module.ModuleIsImported()); |
| EXPECT_TRUE(module.SymbolIsImported(function1)); |
| |
| EXPECT_FALSE(module.ModuleWasAdded()); |
| EXPECT_TRUE(module.SymbolWasAdded(function1)); |
| } |
| |
| |
| } // namespace transforms |
| } // namespace pe |