summaryrefslogtreecommitdiff
path: root/ELF/MapFile.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'ELF/MapFile.cpp')
-rw-r--r--ELF/MapFile.cpp165
1 files changed, 88 insertions, 77 deletions
diff --git a/ELF/MapFile.cpp b/ELF/MapFile.cpp
index 31c8091bb6a1..af5bc3c2c813 100644
--- a/ELF/MapFile.cpp
+++ b/ELF/MapFile.cpp
@@ -11,19 +11,19 @@
// 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)
+// Address Size Align Out In Symbol
+// 00201000 00000015 4 .text
+// 00201000 0000000e 4 test.o:(.text)
+// 0020100e 00000000 0 local
+// 00201005 00000000 0 f(int)
//
//===----------------------------------------------------------------------===//
#include "MapFile.h"
#include "InputFiles.h"
#include "Strings.h"
+#include "SymbolTable.h"
+#include "Threads.h"
#include "llvm/Support/raw_ostream.h"
@@ -33,83 +33,68 @@ 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("%0*llx %0*llx %5lld ", Width, Address, Width, Size, 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);
-}
+typedef DenseMap<const SectionBase *, SmallVector<DefinedRegular *, 4>>
+ SymbolMapTy;
-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);
+// Print out the first three columns of a line.
+template <class ELFT>
+static void writeHeader(raw_ostream &OS, uint64_t Addr, uint64_t Size,
+ uint64_t Align) {
+ int W = ELFT::Is64Bits ? 16 : 8;
+ OS << format("%0*llx %0*llx %5lld ", W, Addr, W, Size, Align);
}
-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);
+static std::string indent(int Depth) { return std::string(Depth * 8, ' '); }
+
+// Returns a list of all symbols that we want to print out.
+template <class ELFT> std::vector<DefinedRegular *> getSymbols() {
+ std::vector<DefinedRegular *> V;
+ for (elf::ObjectFile<ELFT> *File : Symtab<ELFT>::X->getObjectFiles())
+ for (SymbolBody *B : File->getSymbols())
+ if (B->File == File && !B->isSection())
+ if (auto *Sym = dyn_cast<DefinedRegular>(B))
+ if (Sym->Section)
+ V.push_back(Sym);
+ return V;
}
+// Returns a map from sections to their symbols.
template <class ELFT>
-static void writeInputSection(raw_fd_ostream &OS, const InputSection *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->template getFile<ELFT>();
- 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>(Sym);
- if (!DR)
- continue;
- if (DR->Section != IS)
- continue;
- if (DR->isSection())
- continue;
- writeSymbolLine(OS, Width, Sym->getVA(), Sym->getSize<ELFT>(),
- toString(*Sym));
- OS << '\n';
+SymbolMapTy getSectionSyms(ArrayRef<DefinedRegular *> Syms) {
+ SymbolMapTy Ret;
+ for (DefinedRegular *S : Syms)
+ Ret[S->Section].push_back(S);
+
+ // Sort symbols by address. We want to print out symbols in the
+ // order in the output file rather than the order they appeared
+ // in the input files.
+ for (auto &It : Ret) {
+ SmallVectorImpl<DefinedRegular *> &V = It.second;
+ std::sort(V.begin(), V.end(), [](DefinedRegular *A, DefinedRegular *B) {
+ return A->getVA() < B->getVA();
+ });
}
+ return Ret;
}
+// Construct a map from symbols to their stringified representations.
+// Demangling symbols (which is what toString() does) is slow, so
+// we do that in batch using parallel-for.
template <class ELFT>
-static void writeMapFile2(raw_fd_ostream &OS,
- ArrayRef<OutputSection *> OutputSections) {
- int Width = ELFT::Is64Bits ? 16 : 8;
-
- OS << left_justify("Address", Width) << ' ' << left_justify("Size", Width)
- << " Align Out In File Symbol\n";
-
- for (OutputSection *Sec : OutputSections) {
- writeOutSecLine(OS, Width, Sec->Addr, Sec->Size, Sec->Alignment, Sec->Name);
- OS << '\n';
-
- StringRef PrevName = "";
- for (InputSection *IS : Sec->Sections) {
- writeInputSection<ELFT>(OS, IS, PrevName);
- }
- }
+DenseMap<DefinedRegular *, std::string>
+getSymbolStrings(ArrayRef<DefinedRegular *> Syms) {
+ std::vector<std::string> Str(Syms.size());
+ parallelFor(0, Syms.size(), [&](size_t I) {
+ raw_string_ostream OS(Str[I]);
+ writeHeader<ELFT>(OS, Syms[I]->getVA(), Syms[I]->template getSize<ELFT>(),
+ 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;
}
template <class ELFT>
@@ -117,12 +102,38 @@ void elf::writeMapFile(ArrayRef<OutputSection *> OutputSections) {
if (Config->MapFile.empty())
return;
+ // Open a map file for writing.
std::error_code EC;
raw_fd_ostream OS(Config->MapFile, EC, sys::fs::F_None);
- if (EC)
+ if (EC) {
error("cannot open " + Config->MapFile + ": " + EC.message());
- else
- writeMapFile2<ELFT>(OS, OutputSections);
+ return;
+ }
+
+ // Collect symbol info that we want to print out.
+ std::vector<DefinedRegular *> Syms = getSymbols<ELFT>();
+ SymbolMapTy SectionSyms = getSectionSyms<ELFT>(Syms);
+ DenseMap<DefinedRegular *, std::string> SymStr = getSymbolStrings<ELFT>(Syms);
+
+ // Print out the header line.
+ int W = ELFT::Is64Bits ? 16 : 8;
+ OS << left_justify("Address", W) << ' ' << left_justify("Size", W)
+ << " Align Out In Symbol\n";
+
+ // Print out file contents.
+ for (OutputSection *OSec : OutputSections) {
+ writeHeader<ELFT>(OS, OSec->Addr, OSec->Size, OSec->Alignment);
+ OS << OSec->Name << '\n';
+
+ // Dump symbols for each input section.
+ for (InputSection *IS : OSec->Sections) {
+ writeHeader<ELFT>(OS, OSec->Addr + IS->OutSecOff, IS->getSize(),
+ IS->Alignment);
+ OS << indent(1) << toString(IS) << '\n';
+ for (DefinedRegular *Sym : SectionSyms[IS])
+ OS << SymStr[Sym] << '\n';
+ }
+ }
}
template void elf::writeMapFile<ELF32LE>(ArrayRef<OutputSection *>);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-13 14:25:25 +0000