| //===- LLDMapFile.cpp -----------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements the /lldmap option. It shows lists in order and |
| // hierarchically the output sections, input sections, input files and |
| // symbol: |
| // |
| // Address Size Align Out File Symbol |
| // 00201000 00000015 4 .text |
| // 00201000 0000000e 4 test.o:(.text) |
| // 0020100e 00000000 0 local |
| // 00201005 00000000 0 f(int) |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "LLDMapFile.h" |
| #include "COFFLinkerContext.h" |
| #include "SymbolTable.h" |
| #include "Symbols.h" |
| #include "Writer.h" |
| #include "lld/Common/ErrorHandler.h" |
| #include "llvm/Support/Parallel.h" |
| #include "llvm/Support/raw_ostream.h" |
| |
| using namespace llvm; |
| using namespace llvm::object; |
| using namespace lld; |
| using namespace lld::coff; |
| |
| using SymbolMapTy = |
| DenseMap<const SectionChunk *, SmallVector<DefinedRegular *, 4>>; |
| |
| static constexpr char indent8[] = " "; // 8 spaces |
| static constexpr char indent16[] = " "; // 16 spaces |
| |
| // Print out the first three columns of a line. |
| static void writeHeader(raw_ostream &os, uint64_t addr, uint64_t size, |
| uint64_t align) { |
| os << format("%08llx %08llx %5lld ", addr, size, align); |
| } |
| |
| // Returns a list of all symbols that we want to print out. |
| static std::vector<DefinedRegular *> getSymbols(const COFFLinkerContext &ctx) { |
| std::vector<DefinedRegular *> v; |
| for (ObjFile *file : ctx.objFileInstances) |
| for (Symbol *b : file->getSymbols()) |
| if (auto *sym = dyn_cast_or_null<DefinedRegular>(b)) |
| if (sym && !sym->getCOFFSymbol().isSectionDefinition()) |
| v.push_back(sym); |
| return v; |
| } |
| |
| // Returns a map from sections to their symbols. |
| static SymbolMapTy getSectionSyms(ArrayRef<DefinedRegular *> syms) { |
| SymbolMapTy ret; |
| for (DefinedRegular *s : syms) |
| ret[s->getChunk()].push_back(s); |
| |
| // Sort symbols by address. |
| for (auto &it : ret) { |
| SmallVectorImpl<DefinedRegular *> &v = it.second; |
| std::stable_sort(v.begin(), v.end(), [](DefinedRegular *a, DefinedRegular *b) { |
| return a->getRVA() < b->getRVA(); |
| }); |
| } |
| return ret; |
| } |
| |
| // Construct a map from symbols to their stringified representations. |
| static DenseMap<DefinedRegular *, std::string> |
| getSymbolStrings(ArrayRef<DefinedRegular *> syms) { |
| std::vector<std::string> str(syms.size()); |
| parallelForEachN((size_t)0, syms.size(), [&](size_t i) { |
| raw_string_ostream os(str[i]); |
| writeHeader(os, syms[i]->getRVA(), 0, 0); |
| os << indent16 << toString(*syms[i]); |
| }); |
| |
| DenseMap<DefinedRegular *, std::string> ret; |
| for (size_t i = 0, e = syms.size(); i < e; ++i) |
| ret[syms[i]] = std::move(str[i]); |
| return ret; |
| } |
| |
| void lld::coff::writeLLDMapFile(const COFFLinkerContext &ctx) { |
| if (config->lldmapFile.empty()) |
| return; |
| |
| std::error_code ec; |
| raw_fd_ostream os(config->lldmapFile, ec, sys::fs::OF_None); |
| if (ec) |
| fatal("cannot open " + config->lldmapFile + ": " + ec.message()); |
| |
| // Collect symbol info that we want to print out. |
| std::vector<DefinedRegular *> syms = getSymbols(ctx); |
| SymbolMapTy sectionSyms = getSectionSyms(syms); |
| DenseMap<DefinedRegular *, std::string> symStr = getSymbolStrings(syms); |
| |
| // Print out the header line. |
| os << "Address Size Align Out In Symbol\n"; |
| |
| // Print out file contents. |
| for (OutputSection *sec : ctx.outputSections) { |
| writeHeader(os, sec->getRVA(), sec->getVirtualSize(), /*align=*/pageSize); |
| os << sec->name << '\n'; |
| |
| for (Chunk *c : sec->chunks) { |
| auto *sc = dyn_cast<SectionChunk>(c); |
| if (!sc) |
| continue; |
| |
| writeHeader(os, sc->getRVA(), sc->getSize(), sc->getAlignment()); |
| os << indent8 << sc->file->getName() << ":(" << sc->getSectionName() |
| << ")\n"; |
| for (DefinedRegular *sym : sectionSyms[sc]) |
| os << symStr[sym] << '\n'; |
| } |
| } |
| } |