| //===------ LinkGraphTests.cpp - Unit tests for core JITLink classes ------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/ADT/STLExtras.h" |
| #include "llvm/ExecutionEngine/JITLink/JITLink.h" |
| #include "llvm/Support/Endian.h" |
| #include "llvm/Support/Memory.h" |
| #include "gtest/gtest.h" |
| |
| using namespace llvm; |
| using namespace llvm::jitlink; |
| |
| static const char BlockContentBytes[] = { |
| 0x54, 0x68, 0x65, 0x72, 0x65, 0x20, 0x77, 0x61, 0x73, 0x20, 0x6d, 0x6f, |
| 0x76, 0x65, 0x6d, 0x65, 0x6e, 0x74, 0x20, 0x61, 0x74, 0x20, 0x74, 0x68, |
| 0x65, 0x20, 0x73, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2c, 0x20, 0x66, |
| 0x6f, 0x72, 0x20, 0x74, 0x68, 0x65, 0x20, 0x77, 0x6f, 0x72, 0x64, 0x20, |
| 0x68, 0x61, 0x64, 0x20, 0x70, 0x61, 0x73, 0x73, 0x65, 0x64, 0x20, 0x61, |
| 0x72, 0x6f, 0x75, 0x6e, 0x64, 0x0a, 0x54, 0x68, 0x61, 0x74, 0x20, 0x74, |
| 0x68, 0x65, 0x20, 0x63, 0x6f, 0x6c, 0x74, 0x20, 0x66, 0x72, 0x6f, 0x6d, |
| 0x20, 0x4f, 0x6c, 0x64, 0x20, 0x52, 0x65, 0x67, 0x72, 0x65, 0x74, 0x20, |
| 0x68, 0x61, 0x64, 0x20, 0x67, 0x6f, 0x74, 0x20, 0x61, 0x77, 0x61, 0x79, |
| 0x2c, 0x0a, 0x41, 0x6e, 0x64, 0x20, 0x68, 0x61, 0x64, 0x20, 0x6a, 0x6f, |
| 0x69, 0x6e, 0x65, 0x64, 0x20, 0x74, 0x68, 0x65, 0x20, 0x77, 0x69, 0x6c, |
| 0x64, 0x20, 0x62, 0x75, 0x73, 0x68, 0x20, 0x68, 0x6f, 0x72, 0x73, 0x65, |
| 0x73, 0x20, 0x2d, 0x2d, 0x20, 0x68, 0x65, 0x20, 0x77, 0x61, 0x73, 0x20, |
| 0x77, 0x6f, 0x72, 0x74, 0x68, 0x20, 0x61, 0x20, 0x74, 0x68, 0x6f, 0x75, |
| 0x73, 0x61, 0x6e, 0x64, 0x20, 0x70, 0x6f, 0x75, 0x6e, 0x64, 0x2c, 0x0a, |
| 0x53, 0x6f, 0x20, 0x61, 0x6c, 0x6c, 0x20, 0x74, 0x68, 0x65, 0x20, 0x63, |
| 0x72, 0x61, 0x63, 0x6b, 0x73, 0x20, 0x68, 0x61, 0x64, 0x20, 0x67, 0x61, |
| 0x74, 0x68, 0x65, 0x72, 0x65, 0x64, 0x20, 0x74, 0x6f, 0x20, 0x74, 0x68, |
| 0x65, 0x20, 0x66, 0x72, 0x61, 0x79, 0x2e, 0x0a, 0x41, 0x6c, 0x6c, 0x20, |
| 0x74, 0x68, 0x65, 0x20, 0x74, 0x72, 0x69, 0x65, 0x64, 0x20, 0x61, 0x6e, |
| 0x64, 0x20, 0x6e, 0x6f, 0x74, 0x65, 0x64, 0x20, 0x72, 0x69, 0x64, 0x65, |
| 0x72, 0x73, 0x20, 0x66, 0x72, 0x6f, 0x6d, 0x20, 0x74, 0x68, 0x65, 0x20, |
| 0x73, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x20, 0x6e, 0x65, 0x61, |
| 0x72, 0x20, 0x61, 0x6e, 0x64, 0x20, 0x66, 0x61, 0x72, 0x0a, 0x48, 0x61, |
| 0x64, 0x20, 0x6d, 0x75, 0x73, 0x74, 0x65, 0x72, 0x65, 0x64, 0x20, 0x61, |
| 0x74, 0x20, 0x74, 0x68, 0x65, 0x20, 0x68, 0x6f, 0x6d, 0x65, 0x73, 0x74, |
| 0x65, 0x61, 0x64, 0x20, 0x6f, 0x76, 0x65, 0x72, 0x6e, 0x69, 0x67, 0x68, |
| 0x74, 0x2c, 0x0a, 0x46, 0x6f, 0x72, 0x20, 0x74, 0x68, 0x65, 0x20, 0x62, |
| 0x75, 0x73, 0x68, 0x6d, 0x65, 0x6e, 0x20, 0x6c, 0x6f, 0x76, 0x65, 0x20, |
| 0x68, 0x61, 0x72, 0x64, 0x20, 0x72, 0x69, 0x64, 0x69, 0x6e, 0x67, 0x20, |
| 0x77, 0x68, 0x65, 0x72, 0x65, 0x20, 0x74, 0x68, 0x65, 0x20, 0x77, 0x69, |
| 0x6c, 0x64, 0x20, 0x62, 0x75, 0x73, 0x68, 0x20, 0x68, 0x6f, 0x72, 0x73, |
| 0x65, 0x73, 0x20, 0x61, 0x72, 0x65, 0x2c, 0x0a, 0x41, 0x6e, 0x64, 0x20, |
| 0x74, 0x68, 0x65, 0x20, 0x73, 0x74, 0x6f, 0x63, 0x6b, 0x2d, 0x68, 0x6f, |
| 0x72, 0x73, 0x65, 0x20, 0x73, 0x6e, 0x75, 0x66, 0x66, 0x73, 0x20, 0x74, |
| 0x68, 0x65, 0x20, 0x62, 0x61, 0x74, 0x74, 0x6c, 0x65, 0x20, 0x77, 0x69, |
| 0x74, 0x68, 0x20, 0x64, 0x65, 0x6c, 0x69, 0x67, 0x68, 0x74, 0x2e, 0x00}; |
| |
| static ArrayRef<char> BlockContent(BlockContentBytes); |
| |
| TEST(LinkGraphTest, Construction) { |
| // Check that LinkGraph construction works as expected. |
| LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, support::little, |
| getGenericEdgeKindName); |
| EXPECT_EQ(G.getName(), "foo"); |
| EXPECT_EQ(G.getTargetTriple().str(), "x86_64-apple-darwin"); |
| EXPECT_EQ(G.getPointerSize(), 8U); |
| EXPECT_EQ(G.getEndianness(), support::little); |
| EXPECT_TRUE(llvm::empty(G.external_symbols())); |
| EXPECT_TRUE(llvm::empty(G.absolute_symbols())); |
| EXPECT_TRUE(llvm::empty(G.defined_symbols())); |
| EXPECT_TRUE(llvm::empty(G.blocks())); |
| } |
| |
| TEST(LinkGraphTest, AddressAccess) { |
| // Check that we can get addresses for blocks, symbols, and edges. |
| LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, support::little, |
| getGenericEdgeKindName); |
| |
| auto &Sec1 = G.createSection("__data.1", MemProt::Read | MemProt::Write); |
| auto &B1 = G.createContentBlock(Sec1, BlockContent, 0x1000, 8, 0); |
| auto &S1 = G.addDefinedSymbol(B1, 4, "S1", 4, Linkage::Strong, Scope::Default, |
| false, false); |
| B1.addEdge(Edge::FirstRelocation, 8, S1, 0); |
| auto &E1 = *B1.edges().begin(); |
| |
| EXPECT_EQ(B1.getAddress(), 0x1000U) << "Incorrect block address"; |
| EXPECT_EQ(S1.getAddress(), 0x1004U) << "Incorrect symbol address"; |
| EXPECT_EQ(B1.getFixupAddress(E1), 0x1008U) << "Incorrect fixup address"; |
| } |
| |
| TEST(LinkGraphTest, BlockAndSymbolIteration) { |
| // Check that we can iterate over blocks within Sections and across sections. |
| LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, support::little, |
| getGenericEdgeKindName); |
| auto &Sec1 = G.createSection("__data.1", MemProt::Read | MemProt::Write); |
| auto &B1 = G.createContentBlock(Sec1, BlockContent, 0x1000, 8, 0); |
| auto &B2 = G.createContentBlock(Sec1, BlockContent, 0x2000, 8, 0); |
| auto &S1 = G.addDefinedSymbol(B1, 0, "S1", 4, Linkage::Strong, Scope::Default, |
| false, false); |
| auto &S2 = G.addDefinedSymbol(B2, 4, "S2", 4, Linkage::Strong, Scope::Default, |
| false, false); |
| |
| auto &Sec2 = G.createSection("__data.2", MemProt::Read | MemProt::Write); |
| auto &B3 = G.createContentBlock(Sec2, BlockContent, 0x3000, 8, 0); |
| auto &B4 = G.createContentBlock(Sec2, BlockContent, 0x4000, 8, 0); |
| auto &S3 = G.addDefinedSymbol(B3, 0, "S3", 4, Linkage::Strong, Scope::Default, |
| false, false); |
| auto &S4 = G.addDefinedSymbol(B4, 4, "S4", 4, Linkage::Strong, Scope::Default, |
| false, false); |
| |
| // Check that iteration of blocks within a section behaves as expected. |
| EXPECT_EQ(std::distance(Sec1.blocks().begin(), Sec1.blocks().end()), 2); |
| EXPECT_TRUE(llvm::count(Sec1.blocks(), &B1)); |
| EXPECT_TRUE(llvm::count(Sec1.blocks(), &B2)); |
| |
| // Check that iteration of symbols within a section behaves as expected. |
| EXPECT_EQ(std::distance(Sec1.symbols().begin(), Sec1.symbols().end()), 2); |
| EXPECT_TRUE(llvm::count(Sec1.symbols(), &S1)); |
| EXPECT_TRUE(llvm::count(Sec1.symbols(), &S2)); |
| |
| // Check that iteration of blocks across sections behaves as expected. |
| EXPECT_EQ(std::distance(G.blocks().begin(), G.blocks().end()), 4); |
| EXPECT_TRUE(llvm::count(G.blocks(), &B1)); |
| EXPECT_TRUE(llvm::count(G.blocks(), &B2)); |
| EXPECT_TRUE(llvm::count(G.blocks(), &B3)); |
| EXPECT_TRUE(llvm::count(G.blocks(), &B4)); |
| |
| // Check that iteration of defined symbols across sections behaves as |
| // expected. |
| EXPECT_EQ( |
| std::distance(G.defined_symbols().begin(), G.defined_symbols().end()), 4); |
| EXPECT_TRUE(llvm::count(G.defined_symbols(), &S1)); |
| EXPECT_TRUE(llvm::count(G.defined_symbols(), &S2)); |
| EXPECT_TRUE(llvm::count(G.defined_symbols(), &S3)); |
| EXPECT_TRUE(llvm::count(G.defined_symbols(), &S4)); |
| } |
| |
| TEST(LinkGraphTest, ContentAccessAndUpdate) { |
| // Check that we can make a defined symbol external. |
| LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, support::little, |
| getGenericEdgeKindName); |
| auto &Sec = G.createSection("__data", MemProt::Read | MemProt::Write); |
| |
| // Create an initial block. |
| auto &B = G.createContentBlock(Sec, BlockContent, 0x1000, 8, 0); |
| |
| EXPECT_FALSE(B.isContentMutable()) << "Content unexpectedly mutable"; |
| EXPECT_EQ(B.getContent().data(), BlockContent.data()) |
| << "Unexpected block content data pointer"; |
| EXPECT_EQ(B.getContent().size(), BlockContent.size()) |
| << "Unexpected block content size"; |
| |
| // Expect that attempting to get already-mutable content fails if the |
| // content is not yet mutable (debug builds only). |
| #ifndef NDEBUG |
| EXPECT_DEATH({ (void)B.getAlreadyMutableContent(); }, |
| "Content is not mutable") |
| << "Unexpected mutable access allowed to immutable data"; |
| #endif |
| |
| // Check that mutable content is copied on request as expected. |
| auto MutableContent = B.getMutableContent(G); |
| EXPECT_TRUE(B.isContentMutable()) << "Content unexpectedly immutable"; |
| EXPECT_NE(MutableContent.data(), BlockContent.data()) |
| << "Unexpected mutable content data pointer"; |
| EXPECT_EQ(MutableContent.size(), BlockContent.size()) |
| << "Unexpected mutable content size"; |
| EXPECT_TRUE(std::equal(MutableContent.begin(), MutableContent.end(), |
| BlockContent.begin())) |
| << "Unexpected mutable content value"; |
| |
| // Check that already-mutable content behaves as expected, with no |
| // further copies. |
| auto MutableContent2 = B.getMutableContent(G); |
| EXPECT_TRUE(B.isContentMutable()) << "Content unexpectedly immutable"; |
| EXPECT_EQ(MutableContent2.data(), MutableContent.data()) |
| << "Unexpected mutable content 2 data pointer"; |
| EXPECT_EQ(MutableContent2.size(), MutableContent.size()) |
| << "Unexpected mutable content 2 size"; |
| |
| // Check that getAlreadyMutableContent behaves as expected, with no |
| // further copies. |
| auto MutableContent3 = B.getMutableContent(G); |
| EXPECT_TRUE(B.isContentMutable()) << "Content unexpectedly immutable"; |
| EXPECT_EQ(MutableContent3.data(), MutableContent.data()) |
| << "Unexpected mutable content 2 data pointer"; |
| EXPECT_EQ(MutableContent3.size(), MutableContent.size()) |
| << "Unexpected mutable content 2 size"; |
| |
| // Set content back to immutable and check that everything behaves as |
| // expected again. |
| B.setContent(BlockContent); |
| EXPECT_FALSE(B.isContentMutable()) << "Content unexpectedly mutable"; |
| EXPECT_EQ(B.getContent().data(), BlockContent.data()) |
| << "Unexpected block content data pointer"; |
| EXPECT_EQ(B.getContent().size(), BlockContent.size()) |
| << "Unexpected block content size"; |
| |
| // Create an initially mutable block. |
| auto &B2 = G.createMutableContentBlock(Sec, MutableContent, 0x10000, 8, 0); |
| |
| EXPECT_TRUE(B2.isContentMutable()) << "Expected B2 content to be mutable"; |
| } |
| |
| TEST(LinkGraphTest, MakeExternal) { |
| // Check that we can make a defined symbol external. |
| LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, support::little, |
| getGenericEdgeKindName); |
| auto &Sec = G.createSection("__data", MemProt::Read | MemProt::Write); |
| |
| // Create an initial block. |
| auto &B1 = G.createContentBlock(Sec, BlockContent, 0x1000, 8, 0); |
| |
| // Add a symbol to the block. |
| auto &S1 = G.addDefinedSymbol(B1, 0, "S1", 4, Linkage::Strong, Scope::Default, |
| false, false); |
| |
| EXPECT_TRUE(S1.isDefined()) << "Symbol should be defined"; |
| EXPECT_FALSE(S1.isExternal()) << "Symbol should not be external"; |
| EXPECT_FALSE(S1.isAbsolute()) << "Symbol should not be absolute"; |
| EXPECT_TRUE(&S1.getBlock()) << "Symbol should have a non-null block"; |
| EXPECT_EQ(S1.getAddress(), 0x1000U) << "Unexpected symbol address"; |
| |
| EXPECT_EQ( |
| std::distance(G.defined_symbols().begin(), G.defined_symbols().end()), 1U) |
| << "Unexpected number of defined symbols"; |
| EXPECT_EQ( |
| std::distance(G.external_symbols().begin(), G.external_symbols().end()), |
| 0U) |
| << "Unexpected number of external symbols"; |
| |
| // Make S1 external, confirm that the its flags are updated and that it is |
| // moved from the defined symbols to the externals list. |
| G.makeExternal(S1); |
| |
| EXPECT_FALSE(S1.isDefined()) << "Symbol should not be defined"; |
| EXPECT_TRUE(S1.isExternal()) << "Symbol should be external"; |
| EXPECT_FALSE(S1.isAbsolute()) << "Symbol should not be absolute"; |
| EXPECT_EQ(S1.getAddress(), 0U) << "Unexpected symbol address"; |
| |
| EXPECT_EQ( |
| std::distance(G.defined_symbols().begin(), G.defined_symbols().end()), 0U) |
| << "Unexpected number of defined symbols"; |
| EXPECT_EQ( |
| std::distance(G.external_symbols().begin(), G.external_symbols().end()), |
| 1U) |
| << "Unexpected number of external symbols"; |
| } |
| |
| TEST(LinkGraphTest, MakeDefined) { |
| // Check that we can make an external symbol defined. |
| LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, support::little, |
| getGenericEdgeKindName); |
| auto &Sec = G.createSection("__data", MemProt::Read | MemProt::Write); |
| |
| // Create an initial block. |
| auto &B1 = G.createContentBlock(Sec, BlockContent, 0x1000, 8, 0); |
| |
| // Add an external symbol. |
| auto &S1 = G.addExternalSymbol("S1", 4, Linkage::Strong); |
| |
| EXPECT_FALSE(S1.isDefined()) << "Symbol should not be defined"; |
| EXPECT_TRUE(S1.isExternal()) << "Symbol should be external"; |
| EXPECT_FALSE(S1.isAbsolute()) << "Symbol should not be absolute"; |
| EXPECT_EQ(S1.getAddress(), 0U) << "Unexpected symbol address"; |
| |
| EXPECT_EQ( |
| std::distance(G.defined_symbols().begin(), G.defined_symbols().end()), 0U) |
| << "Unexpected number of defined symbols"; |
| EXPECT_EQ( |
| std::distance(G.external_symbols().begin(), G.external_symbols().end()), |
| 1U) |
| << "Unexpected number of external symbols"; |
| |
| // Make S1 defined, confirm that its flags are updated and that it is |
| // moved from the defined symbols to the externals list. |
| G.makeDefined(S1, B1, 0, 4, Linkage::Strong, Scope::Default, false); |
| |
| EXPECT_TRUE(S1.isDefined()) << "Symbol should be defined"; |
| EXPECT_FALSE(S1.isExternal()) << "Symbol should not be external"; |
| EXPECT_FALSE(S1.isAbsolute()) << "Symbol should not be absolute"; |
| EXPECT_TRUE(&S1.getBlock()) << "Symbol should have a non-null block"; |
| EXPECT_EQ(S1.getAddress(), 0x1000U) << "Unexpected symbol address"; |
| |
| EXPECT_EQ( |
| std::distance(G.defined_symbols().begin(), G.defined_symbols().end()), 1U) |
| << "Unexpected number of defined symbols"; |
| EXPECT_EQ( |
| std::distance(G.external_symbols().begin(), G.external_symbols().end()), |
| 0U) |
| << "Unexpected number of external symbols"; |
| } |
| |
| TEST(LinkGraphTest, TransferDefinedSymbol) { |
| // Check that we can transfer a defined symbol from one block to another. |
| LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, support::little, |
| getGenericEdgeKindName); |
| auto &Sec = G.createSection("__data", MemProt::Read | MemProt::Write); |
| |
| // Create an initial block. |
| auto &B1 = G.createContentBlock(Sec, BlockContent, 0x1000, 8, 0); |
| auto &B2 = G.createContentBlock(Sec, BlockContent, 0x2000, 8, 0); |
| auto &B3 = G.createContentBlock(Sec, BlockContent.slice(0, 32), 0x3000, 8, 0); |
| |
| // Add a symbol. |
| auto &S1 = G.addDefinedSymbol(B1, 0, "S1", B1.getSize(), Linkage::Strong, |
| Scope::Default, false, false); |
| |
| // Transfer with zero offset, explicit size. |
| G.transferDefinedSymbol(S1, B2, 0, 64); |
| |
| EXPECT_EQ(&S1.getBlock(), &B2) << "Block was not updated"; |
| EXPECT_EQ(S1.getOffset(), 0U) << "Unexpected offset"; |
| EXPECT_EQ(S1.getSize(), 64U) << "Size was not updated"; |
| |
| // Transfer with non-zero offset, implicit truncation. |
| G.transferDefinedSymbol(S1, B3, 16, None); |
| |
| EXPECT_EQ(&S1.getBlock(), &B3) << "Block was not updated"; |
| EXPECT_EQ(S1.getOffset(), 16U) << "Offset was not updated"; |
| EXPECT_EQ(S1.getSize(), 16U) << "Size was not updated"; |
| } |
| |
| TEST(LinkGraphTest, TransferDefinedSymbolAcrossSections) { |
| // Check that we can transfer a defined symbol from an existing block in one |
| // section to another. |
| LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, support::little, |
| getGenericEdgeKindName); |
| auto &Sec1 = G.createSection("__data.1", MemProt::Read | MemProt::Write); |
| auto &Sec2 = G.createSection("__data.2", MemProt::Read | MemProt::Write); |
| |
| // Create blocks in each section. |
| auto &B1 = G.createContentBlock(Sec1, BlockContent, 0x1000, 8, 0); |
| auto &B2 = G.createContentBlock(Sec2, BlockContent, 0x2000, 8, 0); |
| |
| // Add a symbol to section 1. |
| auto &S1 = G.addDefinedSymbol(B1, 0, "S1", B1.getSize(), Linkage::Strong, |
| Scope::Default, false, false); |
| |
| // Transfer with zero offset, explicit size to section 2. |
| G.transferDefinedSymbol(S1, B2, 0, 64); |
| |
| EXPECT_EQ(&S1.getBlock(), &B2) << "Block was not updated"; |
| EXPECT_EQ(S1.getOffset(), 0U) << "Unexpected offset"; |
| EXPECT_EQ(S1.getSize(), 64U) << "Size was not updated"; |
| |
| EXPECT_EQ(Sec1.symbols_size(), 0u) << "Symbol was not removed from Sec1"; |
| EXPECT_EQ(Sec2.symbols_size(), 1u) << "Symbol was not added to Sec2"; |
| if (Sec2.symbols_size() == 1) { |
| EXPECT_EQ(*Sec2.symbols().begin(), &S1) << "Unexpected symbol"; |
| } |
| } |
| |
| TEST(LinkGraphTest, TransferBlock) { |
| // Check that we can transfer a block (and all associated symbols) from one |
| // section to another. |
| LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, support::little, |
| getGenericEdgeKindName); |
| auto &Sec1 = G.createSection("__data.1", MemProt::Read | MemProt::Write); |
| auto &Sec2 = G.createSection("__data.2", MemProt::Read | MemProt::Write); |
| |
| // Create an initial block. |
| auto &B1 = G.createContentBlock(Sec1, BlockContent, 0x1000, 8, 0); |
| auto &B2 = G.createContentBlock(Sec1, BlockContent, 0x2000, 8, 0); |
| |
| // Add some symbols on B1... |
| G.addDefinedSymbol(B1, 0, "S1", B1.getSize(), Linkage::Strong, Scope::Default, |
| false, false); |
| G.addDefinedSymbol(B1, 1, "S2", B1.getSize() - 1, Linkage::Strong, |
| Scope::Default, false, false); |
| |
| // ... and on B2. |
| G.addDefinedSymbol(B2, 0, "S3", B2.getSize(), Linkage::Strong, Scope::Default, |
| false, false); |
| G.addDefinedSymbol(B2, 1, "S4", B2.getSize() - 1, Linkage::Strong, |
| Scope::Default, false, false); |
| |
| EXPECT_EQ(Sec1.blocks_size(), 2U) << "Expected two blocks in Sec1 initially"; |
| EXPECT_EQ(Sec1.symbols_size(), 4U) |
| << "Expected four symbols in Sec1 initially"; |
| EXPECT_EQ(Sec2.blocks_size(), 0U) << "Expected zero blocks in Sec2 initially"; |
| EXPECT_EQ(Sec2.symbols_size(), 0U) |
| << "Expected zero symbols in Sec2 initially"; |
| |
| // Transfer with zero offset, explicit size. |
| G.transferBlock(B1, Sec2); |
| |
| EXPECT_EQ(Sec1.blocks_size(), 1U) |
| << "Expected one blocks in Sec1 after transfer"; |
| EXPECT_EQ(Sec1.symbols_size(), 2U) |
| << "Expected two symbols in Sec1 after transfer"; |
| EXPECT_EQ(Sec2.blocks_size(), 1U) |
| << "Expected one blocks in Sec2 after transfer"; |
| EXPECT_EQ(Sec2.symbols_size(), 2U) |
| << "Expected two symbols in Sec2 after transfer"; |
| } |
| |
| TEST(LinkGraphTest, MergeSections) { |
| // Check that we can transfer a block (and all associated symbols) from one |
| // section to another. |
| LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, support::little, |
| getGenericEdgeKindName); |
| auto &Sec1 = G.createSection("__data.1", MemProt::Read | MemProt::Write); |
| auto &Sec2 = G.createSection("__data.2", MemProt::Read | MemProt::Write); |
| auto &Sec3 = G.createSection("__data.3", MemProt::Read | MemProt::Write); |
| |
| // Create an initial block. |
| auto &B1 = G.createContentBlock(Sec1, BlockContent, 0x1000, 8, 0); |
| auto &B2 = G.createContentBlock(Sec2, BlockContent, 0x2000, 8, 0); |
| auto &B3 = G.createContentBlock(Sec3, BlockContent, 0x3000, 8, 0); |
| |
| // Add a symbols for each block. |
| G.addDefinedSymbol(B1, 0, "S1", B1.getSize(), Linkage::Strong, Scope::Default, |
| false, false); |
| G.addDefinedSymbol(B2, 0, "S2", B2.getSize(), Linkage::Strong, Scope::Default, |
| false, false); |
| G.addDefinedSymbol(B3, 0, "S3", B2.getSize(), Linkage::Strong, Scope::Default, |
| false, false); |
| |
| EXPECT_EQ(&B1.getSection(), &Sec1); |
| EXPECT_EQ(&B2.getSection(), &Sec2); |
| EXPECT_EQ(G.sections_size(), 3U) << "Expected three sections initially"; |
| EXPECT_EQ(Sec1.blocks_size(), 1U) << "Expected one block in Sec1 initially"; |
| EXPECT_EQ(Sec1.symbols_size(), 1U) << "Expected one symbol in Sec1 initially"; |
| EXPECT_EQ(Sec2.blocks_size(), 1U) << "Expected one block in Sec2 initially"; |
| EXPECT_EQ(Sec2.symbols_size(), 1U) << "Expected one symbol in Sec2 initially"; |
| EXPECT_EQ(Sec3.blocks_size(), 1U) << "Expected one block in Sec3 initially"; |
| EXPECT_EQ(Sec3.symbols_size(), 1U) << "Expected one symbol in Sec3 initially"; |
| |
| // Check that self-merge is a no-op. |
| G.mergeSections(Sec1, Sec1); |
| |
| EXPECT_EQ(&B1.getSection(), &Sec1) |
| << "Expected B1.getSection() to remain unchanged"; |
| EXPECT_EQ(G.sections_size(), 3U) |
| << "Expected three sections after first merge"; |
| EXPECT_EQ(Sec1.blocks_size(), 1U) |
| << "Expected one block in Sec1 after first merge"; |
| EXPECT_EQ(Sec1.symbols_size(), 1U) |
| << "Expected one symbol in Sec1 after first merge"; |
| EXPECT_EQ(Sec2.blocks_size(), 1U) |
| << "Expected one block in Sec2 after first merge"; |
| EXPECT_EQ(Sec2.symbols_size(), 1U) |
| << "Expected one symbol in Sec2 after first merge"; |
| EXPECT_EQ(Sec3.blocks_size(), 1U) |
| << "Expected one block in Sec3 after first merge"; |
| EXPECT_EQ(Sec3.symbols_size(), 1U) |
| << "Expected one symbol in Sec3 after first merge"; |
| |
| // Merge Sec2 into Sec1, removing Sec2. |
| G.mergeSections(Sec1, Sec2); |
| |
| EXPECT_EQ(&B2.getSection(), &Sec1) |
| << "Expected B2.getSection() to have been changed to &Sec1"; |
| EXPECT_EQ(G.sections_size(), 2U) |
| << "Expected two sections after section merge"; |
| EXPECT_EQ(Sec1.blocks_size(), 2U) |
| << "Expected two blocks in Sec1 after section merge"; |
| EXPECT_EQ(Sec1.symbols_size(), 2U) |
| << "Expected two symbols in Sec1 after section merge"; |
| EXPECT_EQ(Sec3.blocks_size(), 1U) |
| << "Expected one block in Sec3 after section merge"; |
| EXPECT_EQ(Sec3.symbols_size(), 1U) |
| << "Expected one symbol in Sec3 after section merge"; |
| |
| G.mergeSections(Sec1, Sec3, true); |
| |
| EXPECT_EQ(G.sections_size(), 2U) << "Expected two sections after third merge"; |
| EXPECT_EQ(Sec1.blocks_size(), 3U) |
| << "Expected three blocks in Sec1 after third merge"; |
| EXPECT_EQ(Sec1.symbols_size(), 3U) |
| << "Expected three symbols in Sec1 after third merge"; |
| EXPECT_EQ(Sec3.blocks_size(), 0U) |
| << "Expected one block in Sec3 after third merge"; |
| EXPECT_EQ(Sec3.symbols_size(), 0U) |
| << "Expected one symbol in Sec3 after third merge"; |
| } |
| |
| TEST(LinkGraphTest, SplitBlock) { |
| // Check that the LinkGraph::splitBlock test works as expected. |
| LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, support::little, |
| getGenericEdgeKindName); |
| auto &Sec = G.createSection("__data", MemProt::Read | MemProt::Write); |
| |
| // Create the block to split. |
| auto &B1 = G.createContentBlock(Sec, BlockContent, 0x1000, 8, 0); |
| |
| // Add some symbols to the block. |
| auto &S1 = G.addDefinedSymbol(B1, 0, "S1", 4, Linkage::Strong, Scope::Default, |
| false, false); |
| auto &S2 = G.addDefinedSymbol(B1, 4, "S2", 4, Linkage::Strong, Scope::Default, |
| false, false); |
| auto &S3 = G.addDefinedSymbol(B1, 8, "S3", 4, Linkage::Strong, Scope::Default, |
| false, false); |
| auto &S4 = G.addDefinedSymbol(B1, 12, "S4", 4, Linkage::Strong, |
| Scope::Default, false, false); |
| // Add a symbol that extends beyond the split. |
| auto &S5 = G.addDefinedSymbol(B1, 0, "S5", 16, Linkage::Strong, |
| Scope::Default, false, false); |
| |
| // Add an extra block, EB, and target symbols, and use these to add edges |
| // from B1 to EB. |
| auto &EB = G.createContentBlock(Sec, BlockContent, 0x2000, 8, 0); |
| auto &ES1 = G.addDefinedSymbol(EB, 0, "TS1", 4, Linkage::Strong, |
| Scope::Default, false, false); |
| auto &ES2 = G.addDefinedSymbol(EB, 4, "TS2", 4, Linkage::Strong, |
| Scope::Default, false, false); |
| auto &ES3 = G.addDefinedSymbol(EB, 8, "TS3", 4, Linkage::Strong, |
| Scope::Default, false, false); |
| auto &ES4 = G.addDefinedSymbol(EB, 12, "TS4", 4, Linkage::Strong, |
| Scope::Default, false, false); |
| |
| // Add edges from B1 to EB. |
| B1.addEdge(Edge::FirstRelocation, 0, ES1, 0); |
| B1.addEdge(Edge::FirstRelocation, 4, ES2, 0); |
| B1.addEdge(Edge::FirstRelocation, 8, ES3, 0); |
| B1.addEdge(Edge::FirstRelocation, 12, ES4, 0); |
| |
| // Split B1. |
| auto &B2 = G.splitBlock(B1, 8); |
| |
| // Check that the block addresses and content matches what we would expect. |
| EXPECT_EQ(B1.getAddress(), 0x1008U); |
| EXPECT_EQ(B1.getContent(), BlockContent.slice(8)); |
| |
| EXPECT_EQ(B2.getAddress(), 0x1000U); |
| EXPECT_EQ(B2.getContent(), BlockContent.slice(0, 8)); |
| |
| // Check that symbols in B1 were transferred as expected: |
| // We expect S1 and S2 to have been transferred to B2, and S3 and S4 to have |
| // remained attached to B1. Symbols S3 and S4 should have had their offsets |
| // slid to account for the change in address of B2. |
| EXPECT_EQ(&S1.getBlock(), &B2); |
| EXPECT_EQ(S1.getOffset(), 0U); |
| |
| EXPECT_EQ(&S2.getBlock(), &B2); |
| EXPECT_EQ(S2.getOffset(), 4U); |
| |
| EXPECT_EQ(&S3.getBlock(), &B1); |
| EXPECT_EQ(S3.getOffset(), 0U); |
| |
| EXPECT_EQ(&S4.getBlock(), &B1); |
| EXPECT_EQ(S4.getOffset(), 4U); |
| |
| EXPECT_EQ(&S5.getBlock(), &B2); |
| EXPECT_EQ(S5.getOffset(), 0U); |
| // Size shrinks to fit. |
| EXPECT_EQ(S5.getSize(), 8U); |
| |
| // Check that edges in B1 have been transferred as expected: |
| // Both blocks should now have two edges each at offsets 0 and 4. |
| EXPECT_EQ(llvm::size(B1.edges()), 2); |
| if (size(B1.edges()) == 2) { |
| auto *E1 = &*B1.edges().begin(); |
| auto *E2 = &*(B1.edges().begin() + 1); |
| if (E2->getOffset() < E1->getOffset()) |
| std::swap(E1, E2); |
| EXPECT_EQ(E1->getOffset(), 0U); |
| EXPECT_EQ(E2->getOffset(), 4U); |
| } |
| |
| EXPECT_EQ(llvm::size(B2.edges()), 2); |
| if (size(B2.edges()) == 2) { |
| auto *E1 = &*B2.edges().begin(); |
| auto *E2 = &*(B2.edges().begin() + 1); |
| if (E2->getOffset() < E1->getOffset()) |
| std::swap(E1, E2); |
| EXPECT_EQ(E1->getOffset(), 0U); |
| EXPECT_EQ(E2->getOffset(), 4U); |
| } |
| } |