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//===- MapFile.cpp --------------------------------------------------------===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// 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 "MapFile.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;
typedef DenseMap<const SectionChunk *, SmallVector<DefinedRegular *, 4>>
SymbolMapTy;
// 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);
}
static std::string indent(int Depth) { return std::string(Depth * 8, ' '); }
// Returns a list of all symbols that we want to print out.
static std::vector<DefinedRegular *> getSymbols() {
std::vector<DefinedRegular *> V;
for (ObjFile *File : ObjFile::Instances)
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::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());
for_each_n(parallel::par, (size_t)0, Syms.size(), [&](size_t I) {
raw_string_ostream OS(Str[I]);
writeHeader(OS, Syms[I]->getRVA(), 0, 0);
OS << indent(2) << 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 coff::writeMapFile(ArrayRef<OutputSection *> OutputSections) {
if (Config->MapFile.empty())
return;
std::error_code EC;
raw_fd_ostream OS(Config->MapFile, EC, sys::fs::F_None);
if (EC)
fatal("cannot open " + Config->MapFile + ": " + EC.message());
// Collect symbol info that we want to print out.
std::vector<DefinedRegular *> Syms = getSymbols();
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 : OutputSections) {
writeHeader(OS, Sec->getRVA(), Sec->getVirtualSize(), /*Align=*/PageSize);
OS << Sec->getName() << '\n';
for (Chunk *C : Sec->getChunks()) {
auto *SC = dyn_cast<SectionChunk>(C);
if (!SC)
continue;
writeHeader(OS, SC->getRVA(), SC->getSize(), SC->Alignment);
OS << indent(1) << SC->File->getName() << ":(" << SC->getSectionName()
<< ")\n";
for (DefinedRegular *Sym : SectionSyms[SC])
OS << SymStr[Sym] << '\n';
}
}
}
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