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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 -Map option. It shows lists in order and
// hierarchically the output sections, input sections, input files and
// symbol:
//
// Address Size Align Out In File Symbol
// =================================================================
// 00201000 00000015 4 .text
// 00201000 0000000e 4 .text
// 00201000 0000000e 4 test.o
// 0020100e 00000000 0 local
// 00201005 00000000 0 f(int)
//
//===----------------------------------------------------------------------===//
#include "MapFile.h"
#include "InputFiles.h"
#include "Strings.h"
#include "llvm/Support/FileUtilities.h"
using namespace llvm;
using namespace llvm::object;
using namespace lld;
using namespace lld::elf;
static void writeOutSecLine(raw_fd_ostream &OS, int Width, uint64_t Address,
uint64_t Size, uint64_t Align, StringRef Name) {
OS << format_hex_no_prefix(Address, Width) << ' '
<< format_hex_no_prefix(Size, Width) << ' ' << format("%5x ", Align)
<< left_justify(Name, 7);
}
static void writeInSecLine(raw_fd_ostream &OS, int Width, uint64_t Address,
uint64_t Size, uint64_t Align, StringRef Name) {
// Pass an empty name to align the text to the correct column.
writeOutSecLine(OS, Width, Address, Size, Align, "");
OS << ' ' << left_justify(Name, 7);
}
static void writeFileLine(raw_fd_ostream &OS, int Width, uint64_t Address,
uint64_t Size, uint64_t Align, StringRef Name) {
// Pass an empty name to align the text to the correct column.
writeInSecLine(OS, Width, Address, Size, Align, "");
OS << ' ' << left_justify(Name, 7);
}
static void writeSymbolLine(raw_fd_ostream &OS, int Width, uint64_t Address,
uint64_t Size, StringRef Name) {
// Pass an empty name to align the text to the correct column.
writeFileLine(OS, Width, Address, Size, 0, "");
OS << ' ' << left_justify(Name, 7);
}
template <class ELFT>
static void writeMapFile2(int FD,
ArrayRef<OutputSectionBase *> OutputSections) {
typedef typename ELFT::uint uintX_t;
raw_fd_ostream OS(FD, true);
int Width = ELFT::Is64Bits ? 16 : 8;
OS << left_justify("Address", Width) << ' ' << left_justify("Size", Width)
<< ' ' << left_justify("Align", 5) << ' ' << left_justify("Out", 7) << ' '
<< left_justify("In", 7) << ' ' << left_justify("File", 7) << " Symbol\n";
for (OutputSectionBase *Sec : OutputSections) {
uintX_t VA = Sec->Addr;
writeOutSecLine(OS, Width, VA, Sec->Size, Sec->Addralign, Sec->getName());
OS << '\n';
StringRef PrevName = "";
Sec->forEachInputSection([&](InputSectionData *S) {
const auto *IS = dyn_cast<InputSection<ELFT>>(S);
if (!IS)
return;
StringRef Name = IS->Name;
if (Name != PrevName) {
writeInSecLine(OS, Width, VA + IS->OutSecOff, IS->getSize(),
IS->Alignment, Name);
OS << '\n';
PrevName = Name;
}
elf::ObjectFile<ELFT> *File = IS->getFile();
if (!File)
return;
writeFileLine(OS, Width, VA + IS->OutSecOff, IS->getSize(), IS->Alignment,
toString(File));
OS << '\n';
ArrayRef<SymbolBody *> Syms = File->getSymbols();
for (SymbolBody *Sym : Syms) {
auto *DR = dyn_cast<DefinedRegular<ELFT>>(Sym);
if (!DR)
continue;
if (DR->Section != IS)
continue;
if (DR->isSection())
continue;
writeSymbolLine(OS, Width, Sym->getVA<ELFT>(), Sym->getSize<ELFT>(),
toString(*Sym));
OS << '\n';
}
});
}
}
template <class ELFT>
void elf::writeMapFile(ArrayRef<OutputSectionBase *> OutputSections) {
StringRef MapFile = Config->MapFile;
if (MapFile.empty())
return;
// Create new file in same directory but with random name.
SmallString<128> TempPath;
int FD;
std::error_code EC =
sys::fs::createUniqueFile(Twine(MapFile) + ".tmp%%%%%%%", FD, TempPath);
if (EC)
fatal(EC.message());
FileRemover RAII(TempPath);
writeMapFile2<ELFT>(FD, OutputSections);
EC = sys::fs::rename(TempPath, MapFile);
if (EC)
fatal(EC.message());
}
template void elf::writeMapFile<ELF32LE>(ArrayRef<OutputSectionBase *>);
template void elf::writeMapFile<ELF32BE>(ArrayRef<OutputSectionBase *>);
template void elf::writeMapFile<ELF64LE>(ArrayRef<OutputSectionBase *>);
template void elf::writeMapFile<ELF64BE>(ArrayRef<OutputSectionBase *>);
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