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435b099115
This makes the design a little more similar to the ELF linker and should allow for features such as ARM range extension thunks to be implemented more easily. Differential Revision: https://reviews.llvm.org/D44501 llvm-svn: 327667
126 lines
4.1 KiB
C++
126 lines
4.1 KiB
C++
//===- MapFile.cpp --------------------------------------------------------===//
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//
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// The LLVM Linker
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the /lldmap option. It shows lists in order and
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// hierarchically the output sections, input sections, input files and
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// symbol:
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//
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// Address Size Align Out File Symbol
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// 00201000 00000015 4 .text
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// 00201000 0000000e 4 test.o:(.text)
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// 0020100e 00000000 0 local
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// 00201005 00000000 0 f(int)
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//
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//===----------------------------------------------------------------------===//
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#include "MapFile.h"
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#include "SymbolTable.h"
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#include "Symbols.h"
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#include "Writer.h"
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#include "lld/Common/ErrorHandler.h"
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#include "llvm/Support/Parallel.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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using namespace llvm::object;
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using namespace lld;
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using namespace lld::coff;
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typedef DenseMap<const SectionChunk *, SmallVector<DefinedRegular *, 4>>
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SymbolMapTy;
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static const std::string Indent8 = " "; // 8 spaces
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static const std::string Indent16 = " "; // 16 spaces
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// Print out the first three columns of a line.
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static void writeHeader(raw_ostream &OS, uint64_t Addr, uint64_t Size,
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uint64_t Align) {
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OS << format("%08llx %08llx %5lld ", Addr, Size, Align);
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}
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// Returns a list of all symbols that we want to print out.
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static std::vector<DefinedRegular *> getSymbols() {
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std::vector<DefinedRegular *> V;
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for (ObjFile *File : ObjFile::Instances)
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for (Symbol *B : File->getSymbols())
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if (auto *Sym = dyn_cast_or_null<DefinedRegular>(B))
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if (Sym && !Sym->getCOFFSymbol().isSectionDefinition())
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V.push_back(Sym);
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return V;
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}
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// Returns a map from sections to their symbols.
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static SymbolMapTy getSectionSyms(ArrayRef<DefinedRegular *> Syms) {
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SymbolMapTy Ret;
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for (DefinedRegular *S : Syms)
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Ret[S->getChunk()].push_back(S);
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// Sort symbols by address.
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for (auto &It : Ret) {
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SmallVectorImpl<DefinedRegular *> &V = It.second;
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std::sort(V.begin(), V.end(), [](DefinedRegular *A, DefinedRegular *B) {
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return A->getRVA() < B->getRVA();
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});
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}
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return Ret;
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}
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// Construct a map from symbols to their stringified representations.
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static DenseMap<DefinedRegular *, std::string>
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getSymbolStrings(ArrayRef<DefinedRegular *> Syms) {
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std::vector<std::string> Str(Syms.size());
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for_each_n(parallel::par, (size_t)0, Syms.size(), [&](size_t I) {
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raw_string_ostream OS(Str[I]);
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writeHeader(OS, Syms[I]->getRVA(), 0, 0);
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OS << Indent16 << toString(*Syms[I]);
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});
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DenseMap<DefinedRegular *, std::string> Ret;
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for (size_t I = 0, E = Syms.size(); I < E; ++I)
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Ret[Syms[I]] = std::move(Str[I]);
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return Ret;
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}
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void coff::writeMapFile(ArrayRef<OutputSection *> OutputSections) {
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if (Config->MapFile.empty())
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return;
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std::error_code EC;
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raw_fd_ostream OS(Config->MapFile, EC, sys::fs::F_None);
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if (EC)
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fatal("cannot open " + Config->MapFile + ": " + EC.message());
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// Collect symbol info that we want to print out.
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std::vector<DefinedRegular *> Syms = getSymbols();
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SymbolMapTy SectionSyms = getSectionSyms(Syms);
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DenseMap<DefinedRegular *, std::string> SymStr = getSymbolStrings(Syms);
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// Print out the header line.
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OS << "Address Size Align Out In Symbol\n";
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// Print out file contents.
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for (OutputSection *Sec : OutputSections) {
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writeHeader(OS, Sec->getRVA(), Sec->getVirtualSize(), /*Align=*/PageSize);
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OS << Sec->Name << '\n';
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for (Chunk *C : Sec->getChunks()) {
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auto *SC = dyn_cast<SectionChunk>(C);
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if (!SC)
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continue;
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writeHeader(OS, SC->getRVA(), SC->getSize(), SC->Alignment);
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OS << Indent8 << SC->File->getName() << ":(" << SC->getSectionName()
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<< ")\n";
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for (DefinedRegular *Sym : SectionSyms[SC])
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OS << SymStr[Sym] << '\n';
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}
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}
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}
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