255870d7b5
LinkGraph::splitBlock used to take a single split-point to split a Block into two. In the common case where a block needs to be split repeatedly (e.g. in eh-frame and compact-unwind sections), iterative calls to splitBlock could lead to poor performance as symbols and edges are repeatedly shuffled to new blocks. This commit updates LinkGraph::splitBlock to take a sequence of split offsets, allowing a block to be split into an arbitrary number of new blocks. Internally, Symbols and Edges only need to be moved once (directly to whichever new block they will be associated with), leading to better performance. On some large MachO object files in an out of tree project this change improved the performance of splitBlock by several orders of magnitude. rdar://135820493
820 lines
34 KiB
C++
820 lines
34 KiB
C++
//===------ LinkGraphTests.cpp - Unit tests for core JITLink classes ------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ExecutionEngine/JITLink/JITLink.h"
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#include "llvm/ExecutionEngine/Orc/ObjectFileInterface.h"
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#include "llvm/Support/Memory.h"
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#include "llvm/Testing/Support/Error.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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using namespace llvm::jitlink;
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static const char BlockContentBytes[] = {
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0x54, 0x68, 0x65, 0x72, 0x65, 0x20, 0x77, 0x61, 0x73, 0x20, 0x6d, 0x6f,
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0x76, 0x65, 0x6d, 0x65, 0x6e, 0x74, 0x20, 0x61, 0x74, 0x20, 0x74, 0x68,
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0x65, 0x20, 0x73, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2c, 0x20, 0x66,
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0x6f, 0x72, 0x20, 0x74, 0x68, 0x65, 0x20, 0x77, 0x6f, 0x72, 0x64, 0x20,
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0x68, 0x61, 0x64, 0x20, 0x70, 0x61, 0x73, 0x73, 0x65, 0x64, 0x20, 0x61,
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0x72, 0x6f, 0x75, 0x6e, 0x64, 0x0a, 0x54, 0x68, 0x61, 0x74, 0x20, 0x74,
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0x68, 0x65, 0x20, 0x63, 0x6f, 0x6c, 0x74, 0x20, 0x66, 0x72, 0x6f, 0x6d,
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0x20, 0x4f, 0x6c, 0x64, 0x20, 0x52, 0x65, 0x67, 0x72, 0x65, 0x74, 0x20,
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0x68, 0x61, 0x64, 0x20, 0x67, 0x6f, 0x74, 0x20, 0x61, 0x77, 0x61, 0x79,
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0x2c, 0x0a, 0x41, 0x6e, 0x64, 0x20, 0x68, 0x61, 0x64, 0x20, 0x6a, 0x6f,
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0x69, 0x6e, 0x65, 0x64, 0x20, 0x74, 0x68, 0x65, 0x20, 0x77, 0x69, 0x6c,
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0x64, 0x20, 0x62, 0x75, 0x73, 0x68, 0x20, 0x68, 0x6f, 0x72, 0x73, 0x65,
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0x73, 0x20, 0x2d, 0x2d, 0x20, 0x68, 0x65, 0x20, 0x77, 0x61, 0x73, 0x20,
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0x77, 0x6f, 0x72, 0x74, 0x68, 0x20, 0x61, 0x20, 0x74, 0x68, 0x6f, 0x75,
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0x73, 0x61, 0x6e, 0x64, 0x20, 0x70, 0x6f, 0x75, 0x6e, 0x64, 0x2c, 0x0a,
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0x53, 0x6f, 0x20, 0x61, 0x6c, 0x6c, 0x20, 0x74, 0x68, 0x65, 0x20, 0x63,
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0x72, 0x61, 0x63, 0x6b, 0x73, 0x20, 0x68, 0x61, 0x64, 0x20, 0x67, 0x61,
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0x74, 0x68, 0x65, 0x72, 0x65, 0x64, 0x20, 0x74, 0x6f, 0x20, 0x74, 0x68,
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0x65, 0x20, 0x66, 0x72, 0x61, 0x79, 0x2e, 0x0a, 0x41, 0x6c, 0x6c, 0x20,
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0x74, 0x68, 0x65, 0x20, 0x74, 0x72, 0x69, 0x65, 0x64, 0x20, 0x61, 0x6e,
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0x64, 0x20, 0x6e, 0x6f, 0x74, 0x65, 0x64, 0x20, 0x72, 0x69, 0x64, 0x65,
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0x73, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x20, 0x6e, 0x65, 0x61,
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0x64, 0x20, 0x6d, 0x75, 0x73, 0x74, 0x65, 0x72, 0x65, 0x64, 0x20, 0x61,
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0x74, 0x20, 0x74, 0x68, 0x65, 0x20, 0x68, 0x6f, 0x6d, 0x65, 0x73, 0x74,
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0x65, 0x61, 0x64, 0x20, 0x6f, 0x76, 0x65, 0x72, 0x6e, 0x69, 0x67, 0x68,
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0x68, 0x61, 0x72, 0x64, 0x20, 0x72, 0x69, 0x64, 0x69, 0x6e, 0x67, 0x20,
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0x77, 0x68, 0x65, 0x72, 0x65, 0x20, 0x74, 0x68, 0x65, 0x20, 0x77, 0x69,
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0x6c, 0x64, 0x20, 0x62, 0x75, 0x73, 0x68, 0x20, 0x68, 0x6f, 0x72, 0x73,
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0x65, 0x73, 0x20, 0x61, 0x72, 0x65, 0x2c, 0x0a, 0x41, 0x6e, 0x64, 0x20,
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0x74, 0x68, 0x65, 0x20, 0x73, 0x74, 0x6f, 0x63, 0x6b, 0x2d, 0x68, 0x6f,
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0x72, 0x73, 0x65, 0x20, 0x73, 0x6e, 0x75, 0x66, 0x66, 0x73, 0x20, 0x74,
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0x68, 0x65, 0x20, 0x62, 0x61, 0x74, 0x74, 0x6c, 0x65, 0x20, 0x77, 0x69,
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0x74, 0x68, 0x20, 0x64, 0x65, 0x6c, 0x69, 0x67, 0x68, 0x74, 0x2e, 0x00};
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static ArrayRef<char> BlockContent(BlockContentBytes);
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TEST(LinkGraphTest, Construction) {
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// Check that LinkGraph construction works as expected.
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LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, llvm::endianness::little,
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getGenericEdgeKindName);
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EXPECT_EQ(G.getName(), "foo");
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EXPECT_EQ(G.getTargetTriple().str(), "x86_64-apple-darwin");
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EXPECT_EQ(G.getPointerSize(), 8U);
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EXPECT_EQ(G.getEndianness(), llvm::endianness::little);
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EXPECT_TRUE(G.external_symbols().empty());
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EXPECT_TRUE(G.absolute_symbols().empty());
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EXPECT_TRUE(G.defined_symbols().empty());
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EXPECT_TRUE(G.blocks().empty());
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}
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TEST(LinkGraphTest, AddressAccess) {
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// Check that we can get addresses for blocks, symbols, and edges.
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LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, llvm::endianness::little,
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getGenericEdgeKindName);
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auto &Sec1 =
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G.createSection("__data.1", orc::MemProt::Read | orc::MemProt::Write);
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orc::ExecutorAddr B1Addr(0x1000);
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auto &B1 = G.createContentBlock(Sec1, BlockContent, B1Addr, 8, 0);
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auto &S1 = G.addDefinedSymbol(B1, 4, "S1", 4, Linkage::Strong, Scope::Default,
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false, false);
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B1.addEdge(Edge::FirstRelocation, 8, S1, 0);
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auto &E1 = *B1.edges().begin();
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EXPECT_EQ(B1.getAddress(), B1Addr) << "Incorrect block address";
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EXPECT_EQ(S1.getAddress(), B1Addr + 4) << "Incorrect symbol address";
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EXPECT_EQ(B1.getFixupAddress(E1), B1Addr + 8) << "Incorrect fixup address";
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}
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TEST(LinkGraphTest, SectionEmpty) {
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// Check that Section::empty behaves as expected.
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LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, llvm::endianness::little,
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getGenericEdgeKindName);
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auto &Sec1 =
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G.createSection("__data.1", orc::MemProt::Read | orc::MemProt::Write);
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auto &B =
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G.createContentBlock(Sec1, BlockContent, orc::ExecutorAddr(0x1000), 8, 0);
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G.addDefinedSymbol(B, 0, "S", 4, Linkage::Strong, Scope::Default, false,
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false);
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auto &Sec2 =
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G.createSection("__data.2", orc::MemProt::Read | orc::MemProt::Write);
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EXPECT_FALSE(Sec1.empty());
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EXPECT_TRUE(Sec2.empty());
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}
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TEST(LinkGraphTest, BlockAndSymbolIteration) {
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// Check that we can iterate over blocks within Sections and across sections.
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LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, llvm::endianness::little,
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getGenericEdgeKindName);
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auto &Sec1 =
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G.createSection("__data.1", orc::MemProt::Read | orc::MemProt::Write);
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orc::ExecutorAddr B1Addr(0x1000);
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auto &B1 = G.createContentBlock(Sec1, BlockContent, B1Addr, 8, 0);
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orc::ExecutorAddr B2Addr(0x2000);
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auto &B2 = G.createContentBlock(Sec1, BlockContent, B2Addr, 8, 0);
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auto &S1 = G.addDefinedSymbol(B1, 0, "S1", 4, Linkage::Strong, Scope::Default,
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false, false);
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auto &S2 = G.addDefinedSymbol(B2, 4, "S2", 4, Linkage::Strong, Scope::Default,
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false, false);
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auto &Sec2 =
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G.createSection("__data.2", orc::MemProt::Read | orc::MemProt::Write);
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orc::ExecutorAddr B3Addr(0x3000);
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auto &B3 = G.createContentBlock(Sec2, BlockContent, B3Addr, 8, 0);
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orc::ExecutorAddr B4Addr(0x4000);
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auto &B4 = G.createContentBlock(Sec2, BlockContent, B4Addr, 8, 0);
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auto &S3 = G.addDefinedSymbol(B3, 0, "S3", 4, Linkage::Strong, Scope::Default,
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false, false);
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auto &S4 = G.addDefinedSymbol(B4, 4, "S4", 4, Linkage::Strong, Scope::Default,
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false, false);
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// Check that iteration of blocks within a section behaves as expected.
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EXPECT_EQ(std::distance(Sec1.blocks().begin(), Sec1.blocks().end()), 2);
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EXPECT_TRUE(llvm::count(Sec1.blocks(), &B1));
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EXPECT_TRUE(llvm::count(Sec1.blocks(), &B2));
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// Check that iteration of symbols within a section behaves as expected.
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EXPECT_EQ(std::distance(Sec1.symbols().begin(), Sec1.symbols().end()), 2);
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EXPECT_TRUE(llvm::count(Sec1.symbols(), &S1));
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EXPECT_TRUE(llvm::count(Sec1.symbols(), &S2));
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// Check that iteration of blocks across sections behaves as expected.
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EXPECT_EQ(std::distance(G.blocks().begin(), G.blocks().end()), 4);
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EXPECT_TRUE(llvm::count(G.blocks(), &B1));
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EXPECT_TRUE(llvm::count(G.blocks(), &B2));
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EXPECT_TRUE(llvm::count(G.blocks(), &B3));
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EXPECT_TRUE(llvm::count(G.blocks(), &B4));
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// Check that iteration of defined symbols across sections behaves as
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// expected.
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EXPECT_EQ(
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std::distance(G.defined_symbols().begin(), G.defined_symbols().end()), 4);
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EXPECT_TRUE(llvm::count(G.defined_symbols(), &S1));
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EXPECT_TRUE(llvm::count(G.defined_symbols(), &S2));
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EXPECT_TRUE(llvm::count(G.defined_symbols(), &S3));
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EXPECT_TRUE(llvm::count(G.defined_symbols(), &S4));
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}
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TEST(LinkGraphTest, ContentAccessAndUpdate) {
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// Check that we can make a defined symbol external.
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LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, llvm::endianness::little,
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getGenericEdgeKindName);
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auto &Sec =
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G.createSection("__data", orc::MemProt::Read | orc::MemProt::Write);
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// Create an initial block.
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orc::ExecutorAddr BAddr(0x1000);
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auto &B = G.createContentBlock(Sec, BlockContent, BAddr, 8, 0);
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EXPECT_FALSE(B.isContentMutable()) << "Content unexpectedly mutable";
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EXPECT_EQ(B.getContent().data(), BlockContent.data())
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<< "Unexpected block content data pointer";
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EXPECT_EQ(B.getContent().size(), BlockContent.size())
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<< "Unexpected block content size";
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// Expect that attempting to get already-mutable content fails if the
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// content is not yet mutable (debug builds only).
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#ifndef NDEBUG
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EXPECT_DEATH({ (void)B.getAlreadyMutableContent(); },
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"Content is not mutable")
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<< "Unexpected mutable access allowed to immutable data";
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#endif
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// Check that mutable content is copied on request as expected.
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auto MutableContent = B.getMutableContent(G);
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EXPECT_TRUE(B.isContentMutable()) << "Content unexpectedly immutable";
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EXPECT_NE(MutableContent.data(), BlockContent.data())
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<< "Unexpected mutable content data pointer";
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EXPECT_EQ(MutableContent.size(), BlockContent.size())
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<< "Unexpected mutable content size";
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EXPECT_TRUE(std::equal(MutableContent.begin(), MutableContent.end(),
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BlockContent.begin()))
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<< "Unexpected mutable content value";
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// Check that already-mutable content behaves as expected, with no
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// further copies.
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auto MutableContent2 = B.getMutableContent(G);
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EXPECT_TRUE(B.isContentMutable()) << "Content unexpectedly immutable";
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EXPECT_EQ(MutableContent2.data(), MutableContent.data())
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<< "Unexpected mutable content 2 data pointer";
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EXPECT_EQ(MutableContent2.size(), MutableContent.size())
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<< "Unexpected mutable content 2 size";
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// Check that getAlreadyMutableContent behaves as expected, with no
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// further copies.
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auto MutableContent3 = B.getMutableContent(G);
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EXPECT_TRUE(B.isContentMutable()) << "Content unexpectedly immutable";
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EXPECT_EQ(MutableContent3.data(), MutableContent.data())
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<< "Unexpected mutable content 2 data pointer";
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EXPECT_EQ(MutableContent3.size(), MutableContent.size())
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<< "Unexpected mutable content 2 size";
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// Check that we can obtain a writer and reader over the content.
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// Check that we can get a BinaryStreamReader for B.
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auto Writer = G.getBlockContentWriter(B);
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EXPECT_THAT_ERROR(Writer.writeInteger((uint32_t)0xcafef00d), Succeeded());
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auto Reader = G.getBlockContentReader(B);
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uint32_t Initial32Bits = 0;
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EXPECT_THAT_ERROR(Reader.readInteger(Initial32Bits), Succeeded());
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EXPECT_EQ(Initial32Bits, (uint32_t)0xcafef00d);
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// Set content back to immutable and check that everything behaves as
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// expected again.
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B.setContent(BlockContent);
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EXPECT_FALSE(B.isContentMutable()) << "Content unexpectedly mutable";
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EXPECT_EQ(B.getContent().data(), BlockContent.data())
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<< "Unexpected block content data pointer";
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EXPECT_EQ(B.getContent().size(), BlockContent.size())
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<< "Unexpected block content size";
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// Create an initially mutable block.
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auto &B2 = G.createMutableContentBlock(Sec, MutableContent,
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orc::ExecutorAddr(0x10000), 8, 0);
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EXPECT_TRUE(B2.isContentMutable()) << "Expected B2 content to be mutable";
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EXPECT_EQ(B2.getSize(), MutableContent.size());
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// Create a mutable content block with initial zero-fill.
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auto &B3 =
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G.createMutableContentBlock(Sec, 16, orc::ExecutorAddr(0x2000), 8, 0);
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EXPECT_TRUE(B3.isContentMutable()) << "Expected B2 content to be mutable";
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EXPECT_EQ(B3.getSize(), 16U);
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EXPECT_TRUE(llvm::all_of(B3.getAlreadyMutableContent(),
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[](char C) { return C == 0; }));
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}
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TEST(LinkGraphTest, MakeExternal) {
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// Check that we can make defined and absolute symbols external.
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LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, llvm::endianness::little,
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getGenericEdgeKindName);
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auto &Sec =
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G.createSection("__data", orc::MemProt::Read | orc::MemProt::Write);
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// Create an initial block.
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auto &B1 =
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G.createContentBlock(Sec, BlockContent, orc::ExecutorAddr(0x1000), 8, 0);
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// Add a symbol to the block.
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auto &S1 = G.addDefinedSymbol(B1, 0, "S1", 4, Linkage::Strong, Scope::Default,
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false, false);
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EXPECT_TRUE(S1.isDefined()) << "Symbol should be defined";
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EXPECT_FALSE(S1.isExternal()) << "Symbol should not be external";
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EXPECT_FALSE(S1.isAbsolute()) << "Symbol should not be absolute";
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EXPECT_TRUE(&S1.getBlock()) << "Symbol should have a non-null block";
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EXPECT_EQ(S1.getAddress(), orc::ExecutorAddr(0x1000))
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<< "Unexpected symbol address";
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EXPECT_EQ(
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std::distance(G.defined_symbols().begin(), G.defined_symbols().end()), 1U)
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<< "Unexpected number of defined symbols";
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EXPECT_EQ(
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std::distance(G.external_symbols().begin(), G.external_symbols().end()),
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0U)
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<< "Unexpected number of external symbols";
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// Add an absolute symbol.
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auto &S2 = G.addAbsoluteSymbol("S2", orc::ExecutorAddr(0x2000), 0,
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Linkage::Strong, Scope::Default, true);
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EXPECT_TRUE(S2.isAbsolute()) << "Symbol should be absolute";
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EXPECT_EQ(
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std::distance(G.absolute_symbols().begin(), G.absolute_symbols().end()),
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1U)
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<< "Unexpected number of symbols";
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// Make S1 and S2 external, confirm that the its flags are updated and that it
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// is moved from the defined/absolute symbols lists to the externals list.
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G.makeExternal(S1);
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G.makeExternal(S2);
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EXPECT_FALSE(S1.isDefined()) << "Symbol should not be defined";
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EXPECT_TRUE(S1.isExternal()) << "Symbol should be external";
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EXPECT_FALSE(S1.isAbsolute()) << "Symbol should not be absolute";
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EXPECT_FALSE(S2.isDefined()) << "Symbol should not be defined";
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EXPECT_TRUE(S2.isExternal()) << "Symbol should be external";
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EXPECT_FALSE(S2.isAbsolute()) << "Symbol should not be absolute";
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EXPECT_EQ(S1.getAddress(), orc::ExecutorAddr())
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<< "Unexpected symbol address";
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EXPECT_EQ(S2.getAddress(), orc::ExecutorAddr())
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<< "Unexpected symbol address";
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EXPECT_EQ(
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std::distance(G.defined_symbols().begin(), G.defined_symbols().end()), 0U)
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<< "Unexpected number of defined symbols";
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EXPECT_EQ(
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std::distance(G.external_symbols().begin(), G.external_symbols().end()),
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2U)
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<< "Unexpected number of external symbols";
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EXPECT_EQ(
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std::distance(G.absolute_symbols().begin(), G.absolute_symbols().end()),
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0U)
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<< "Unexpected number of external symbols";
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}
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TEST(LinkGraphTest, MakeAbsolute) {
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// Check that we can make defined and external symbols absolute.
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LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, llvm::endianness::little,
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getGenericEdgeKindName);
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auto &Sec =
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G.createSection("__data", orc::MemProt::Read | orc::MemProt::Write);
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// Create an initial block.
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auto &B1 =
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G.createContentBlock(Sec, BlockContent, orc::ExecutorAddr(0x1000), 8, 0);
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|
|
|
// 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(), orc::ExecutorAddr(0x1000))
|
|
<< "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";
|
|
|
|
// Add an external symbol.
|
|
auto &S2 = G.addExternalSymbol("S2", 0, true);
|
|
|
|
EXPECT_TRUE(S2.isExternal()) << "Symbol should be external";
|
|
EXPECT_EQ(
|
|
std::distance(G.external_symbols().begin(), G.external_symbols().end()),
|
|
1U)
|
|
<< "Unexpected number of symbols";
|
|
|
|
// Make S1 and S2 absolute, confirm that the its flags are updated and that it
|
|
// is moved from the defined/external symbols lists to the absolutes list.
|
|
orc::ExecutorAddr S1AbsAddr(0xA000);
|
|
orc::ExecutorAddr S2AbsAddr(0xB000);
|
|
G.makeAbsolute(S1, S1AbsAddr);
|
|
G.makeAbsolute(S2, S2AbsAddr);
|
|
|
|
EXPECT_FALSE(S1.isDefined()) << "Symbol should not be defined";
|
|
EXPECT_FALSE(S1.isExternal()) << "Symbol should not be external";
|
|
EXPECT_TRUE(S1.isAbsolute()) << "Symbol should be absolute";
|
|
EXPECT_FALSE(S2.isDefined()) << "Symbol should not be defined";
|
|
EXPECT_FALSE(S2.isExternal()) << "Symbol should not be absolute";
|
|
EXPECT_TRUE(S2.isAbsolute()) << "Symbol should be absolute";
|
|
|
|
EXPECT_EQ(S1.getAddress(), S1AbsAddr) << "Unexpected symbol address";
|
|
EXPECT_EQ(S2.getAddress(), S2AbsAddr) << "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()),
|
|
0U)
|
|
<< "Unexpected number of external symbols";
|
|
EXPECT_EQ(
|
|
std::distance(G.absolute_symbols().begin(), G.absolute_symbols().end()),
|
|
2U)
|
|
<< "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, llvm::endianness::little,
|
|
getGenericEdgeKindName);
|
|
auto &Sec =
|
|
G.createSection("__data", orc::MemProt::Read | orc::MemProt::Write);
|
|
|
|
// Create an initial block.
|
|
orc::ExecutorAddr B1Addr(0x1000);
|
|
auto &B1 = G.createContentBlock(Sec, BlockContent, B1Addr, 8, 0);
|
|
|
|
// Add an external symbol.
|
|
auto &S1 = G.addExternalSymbol("S1", 4, true);
|
|
|
|
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(), orc::ExecutorAddr())
|
|
<< "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(), orc::ExecutorAddr(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, llvm::endianness::little,
|
|
getGenericEdgeKindName);
|
|
auto &Sec =
|
|
G.createSection("__data", orc::MemProt::Read | orc::MemProt::Write);
|
|
|
|
// Create initial blocks.
|
|
orc::ExecutorAddr B1Addr(0x1000);
|
|
auto &B1 = G.createContentBlock(Sec, BlockContent, B1Addr, 8, 0);
|
|
orc::ExecutorAddr B2Addr(0x2000);
|
|
auto &B2 = G.createContentBlock(Sec, BlockContent, B2Addr, 8, 0);
|
|
orc::ExecutorAddr B3Addr(0x3000);
|
|
auto &B3 = G.createContentBlock(Sec, BlockContent.slice(0, 32), B3Addr, 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, std::nullopt);
|
|
|
|
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, llvm::endianness::little,
|
|
getGenericEdgeKindName);
|
|
auto &Sec1 =
|
|
G.createSection("__data.1", orc::MemProt::Read | orc::MemProt::Write);
|
|
auto &Sec2 =
|
|
G.createSection("__data.2", orc::MemProt::Read | orc::MemProt::Write);
|
|
|
|
// Create blocks in each section.
|
|
orc::ExecutorAddr B1Addr(0x1000);
|
|
auto &B1 = G.createContentBlock(Sec1, BlockContent, B1Addr, 8, 0);
|
|
orc::ExecutorAddr B2Addr(0x2000);
|
|
auto &B2 = G.createContentBlock(Sec2, BlockContent, B2Addr, 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, llvm::endianness::little,
|
|
getGenericEdgeKindName);
|
|
auto &Sec1 =
|
|
G.createSection("__data.1", orc::MemProt::Read | orc::MemProt::Write);
|
|
auto &Sec2 =
|
|
G.createSection("__data.2", orc::MemProt::Read | orc::MemProt::Write);
|
|
|
|
// Create an initial block.
|
|
orc::ExecutorAddr B1Addr(0x1000);
|
|
auto &B1 = G.createContentBlock(Sec1, BlockContent, B1Addr, 8, 0);
|
|
orc::ExecutorAddr B2Addr(0x2000);
|
|
auto &B2 = G.createContentBlock(Sec1, BlockContent, B2Addr, 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, llvm::endianness::little,
|
|
getGenericEdgeKindName);
|
|
auto &Sec1 =
|
|
G.createSection("__data.1", orc::MemProt::Read | orc::MemProt::Write);
|
|
auto &Sec2 =
|
|
G.createSection("__data.2", orc::MemProt::Read | orc::MemProt::Write);
|
|
auto &Sec3 =
|
|
G.createSection("__data.3", orc::MemProt::Read | orc::MemProt::Write);
|
|
|
|
// Create an initial block.
|
|
orc::ExecutorAddr B1Addr(0x1000);
|
|
auto &B1 = G.createContentBlock(Sec1, BlockContent, B1Addr, 8, 0);
|
|
orc::ExecutorAddr B2Addr(0x2000);
|
|
auto &B2 = G.createContentBlock(Sec2, BlockContent, B2Addr, 8, 0);
|
|
orc::ExecutorAddr B3Addr(0x3000);
|
|
auto &B3 = G.createContentBlock(Sec3, BlockContent, B3Addr, 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, llvm::endianness::little,
|
|
getGenericEdgeKindName);
|
|
auto &Sec =
|
|
G.createSection("__data", orc::MemProt::Read | orc::MemProt::Write);
|
|
|
|
// Create the block to split.
|
|
orc::ExecutorAddr B1Addr(0x1000);
|
|
auto &B1 = G.createContentBlock(Sec, BlockContent, B1Addr, 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.
|
|
orc::ExecutorAddr EBAddr(0x2000);
|
|
auto &EB = G.createContentBlock(Sec, BlockContent, EBAddr, 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 Blocks = G.splitBlock(B1, ArrayRef<int>({8}));
|
|
|
|
EXPECT_EQ(Blocks.size(), 2U);
|
|
EXPECT_EQ(Blocks[0], &B1);
|
|
auto &B2 = *Blocks[1];
|
|
|
|
// Check that the block addresses and content matches what we would expect.
|
|
EXPECT_EQ(B1.getAddress(), B1Addr);
|
|
EXPECT_EQ(B1.getContent(), BlockContent.slice(0, 8));
|
|
EXPECT_EQ(B1.edges_size(), 2U);
|
|
|
|
EXPECT_EQ(B2.getAddress(), B1Addr + 8);
|
|
EXPECT_EQ(B2.getContent(), BlockContent.slice(8));
|
|
EXPECT_EQ(B2.edges_size(), 2U);
|
|
|
|
// Check that symbols in B2 were transferred as expected:
|
|
// We expect S1 and S2 to have been transferred to B1, and S3 and S4 to have
|
|
// remained attached to B2. Symbols S3 and S4 should have had their offsets
|
|
// slid to account for the change in address of B1.
|
|
EXPECT_EQ(&S1.getBlock(), &B1);
|
|
EXPECT_EQ(S1.getOffset(), 0U);
|
|
|
|
EXPECT_EQ(&S2.getBlock(), &B1);
|
|
EXPECT_EQ(S2.getOffset(), 4U);
|
|
|
|
EXPECT_EQ(&S3.getBlock(), &B2);
|
|
EXPECT_EQ(S3.getOffset(), 0U);
|
|
|
|
EXPECT_EQ(&S4.getBlock(), &B2);
|
|
EXPECT_EQ(S4.getOffset(), 4U);
|
|
|
|
EXPECT_EQ(&S5.getBlock(), &B1);
|
|
EXPECT_EQ(S5.getOffset(), 0U);
|
|
|
|
// Size shrinks to fit.
|
|
EXPECT_EQ(S5.getSize(), 8U);
|
|
|
|
// Check that edges in B2 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);
|
|
}
|
|
}
|
|
|
|
TEST(LinkGraphTest, GraphAllocationMethods) {
|
|
LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, llvm::endianness::little,
|
|
getGenericEdgeKindName);
|
|
|
|
// Test allocation of sized, uninitialized buffer.
|
|
auto Buf1 = G.allocateBuffer(10);
|
|
EXPECT_EQ(Buf1.size(), 10U);
|
|
|
|
// Test allocation of content-backed buffer.
|
|
char Buf2Src[] = {1, static_cast<char>(-1), 0, 42};
|
|
auto Buf2 = G.allocateContent(ArrayRef<char>(Buf2Src));
|
|
EXPECT_EQ(Buf2, ArrayRef<char>(Buf2Src));
|
|
|
|
// Test c-string allocation from StringRef.
|
|
StringRef Buf3Src = "hello";
|
|
auto Buf3 = G.allocateCString(Buf3Src);
|
|
EXPECT_TRUE(llvm::equal(Buf3.drop_back(1), Buf3Src));
|
|
EXPECT_EQ(Buf3.back(), '\0');
|
|
}
|
|
|
|
TEST(LinkGraphTest, IsCStringBlockTest) {
|
|
// Check that the LinkGraph::splitBlock test works as expected.
|
|
LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, llvm::endianness::little,
|
|
getGenericEdgeKindName);
|
|
auto &Sec =
|
|
G.createSection("__data", orc::MemProt::Read | orc::MemProt::Write);
|
|
|
|
char CString[] = "hello, world!";
|
|
char NotACString[] = {0, 1, 0, 1, 0};
|
|
|
|
auto &CStringBlock =
|
|
G.createContentBlock(Sec, CString, orc::ExecutorAddr(), 1, 0);
|
|
auto &NotACStringBlock =
|
|
G.createContentBlock(Sec, NotACString, orc::ExecutorAddr(), 1, 0);
|
|
auto &SizeOneZeroFillBlock =
|
|
G.createZeroFillBlock(Sec, 1, orc::ExecutorAddr(), 1, 0);
|
|
auto &LargerZeroFillBlock =
|
|
G.createZeroFillBlock(Sec, 2, orc::ExecutorAddr(), 1, 0);
|
|
|
|
EXPECT_TRUE(isCStringBlock(CStringBlock));
|
|
EXPECT_FALSE(isCStringBlock(NotACStringBlock));
|
|
EXPECT_TRUE(isCStringBlock(SizeOneZeroFillBlock));
|
|
EXPECT_FALSE(isCStringBlock(LargerZeroFillBlock));
|
|
}
|
|
|
|
TEST(LinkGraphTest, BasicLayoutHonorsNoAlloc) {
|
|
// Check that BasicLayout honors NoAlloc.
|
|
LinkGraph G("foo", Triple("x86_64-apple-darwin"), 8, llvm::endianness::little,
|
|
getGenericEdgeKindName);
|
|
|
|
// Create a regular section and block.
|
|
auto &Sec1 =
|
|
G.createSection("__data", orc::MemProt::Read | orc::MemProt::Write);
|
|
G.createContentBlock(Sec1, BlockContent.slice(0, 8), orc::ExecutorAddr(), 8,
|
|
0);
|
|
|
|
// Create a NoAlloc section and block.
|
|
auto &Sec2 =
|
|
G.createSection("__metadata", orc::MemProt::Read | orc::MemProt::Write);
|
|
Sec2.setMemLifetime(orc::MemLifetime::NoAlloc);
|
|
G.createContentBlock(Sec2, BlockContent.slice(0, 8), orc::ExecutorAddr(), 8,
|
|
0);
|
|
|
|
BasicLayout BL(G);
|
|
|
|
EXPECT_EQ(std::distance(BL.segments().begin(), BL.segments().end()), 1U);
|
|
EXPECT_EQ(BL.segments().begin()->first,
|
|
orc::MemProt::Read | orc::MemProt::Write);
|
|
auto &SegInfo = BL.segments().begin()->second;
|
|
EXPECT_EQ(SegInfo.Alignment, 8U);
|
|
EXPECT_EQ(SegInfo.ContentSize, 8U);
|
|
}
|