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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/raw_ostream.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 writeInputSection(raw_fd_ostream &OS, const InputSection<ELFT> *IS,
StringRef &PrevName) {
int Width = ELFT::Is64Bits ? 16 : 8;
StringRef Name = IS->Name;
if (Name != PrevName) {
writeInSecLine(OS, Width, IS->OutSec->Addr + IS->OutSecOff, IS->getSize(),
IS->Alignment, Name);
OS << '\n';
PrevName = Name;
}
elf::ObjectFile<ELFT> *File = IS->getFile();
if (!File)
return;
writeFileLine(OS, Width, IS->OutSec->Addr + IS->OutSecOff, IS->getSize(),
IS->Alignment, toString(File));
OS << '\n';
for (SymbolBody *Sym : File->getSymbols()) {
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>
static void writeMapFile2(raw_fd_ostream &OS,
ArrayRef<OutputSectionBase *> OutputSections) {
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) {
writeOutSecLine(OS, Width, Sec->Addr, Sec->Size, Sec->Addralign,
Sec->getName());
OS << '\n';
StringRef PrevName = "";
Sec->forEachInputSection([&](InputSectionData *S) {
if (const auto *IS = dyn_cast<InputSection<ELFT>>(S))
writeInputSection(OS, IS, PrevName);
});
}
}
template <class ELFT>
void elf::writeMapFile(ArrayRef<OutputSectionBase *> 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());
writeMapFile2<ELFT>(OS, OutputSections);
}
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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