[llvm-dwp] Don't rely on implicit move assignment operator (MSVC won't synthesize...

[oota-llvm.git] / lib / DebugInfo / DWARF / DWARFUnitIndex.cpp

diff --git a/lib/DebugInfo/DWARF/DWARFUnitIndex.cpp b/lib/DebugInfo/DWARF/DWARFUnitIndex.cpp
index f97a68f860ad154efefbf1471a9e009791e34a8f..1f1921649b57ae760ce9d711a53c11e0b8def6be 100644 (file)
--- a/lib/DebugInfo/DWARF/DWARFUnitIndex.cpp
+++ b/lib/DebugInfo/DWARF/DWARFUnitIndex.cpp
@@ -26,13 +26,22 @@ bool DWARFUnitIndex::Header::parse(DataExtractor IndexData,
 }
 
 void DWARFUnitIndex::Header::dump(raw_ostream &OS) const {
-  OS << "Index header:\n" << format("   version: %u\n", Version)
-     << format("   columns: %u\n", NumColumns)
-     << format("     units: %u\n", NumUnits)
-     << format("   buckets: %u\n", NumBuckets);
+  OS << format("version = %u slots = %u\n\n", Version, NumBuckets);
 }
 
 bool DWARFUnitIndex::parse(DataExtractor IndexData) {
+  bool b = parseImpl(IndexData);
+  if (!b) {
+    // Make sure we don't try to dump anything
+    Header.NumBuckets = 0;
+    // Release any partially initialized data.
+    ColumnKinds.reset();
+    Rows.reset();
+  }
+  return b;
+}
+
+bool DWARFUnitIndex::parseImpl(DataExtractor IndexData) {
   uint32_t Offset = 0;
   if (!Header.parse(IndexData, &Offset))
     return false;
@@ -42,10 +51,57 @@ bool DWARFUnitIndex::parse(DataExtractor IndexData) {
                       (2 * Header.NumUnits + 1) * 4 * Header.NumColumns))
     return false;
 
+  Rows = llvm::make_unique<Entry[]>(Header.NumBuckets);
+  auto Contribs =
+      llvm::make_unique<Entry::SectionContribution *[]>(Header.NumUnits);
+  ColumnKinds = llvm::make_unique<DWARFSectionKind[]>(Header.NumColumns);
+
+  // Read Hash Table of Signatures
+  for (unsigned i = 0; i != Header.NumBuckets; ++i)
+    Rows[i].Signature = IndexData.getU64(&Offset);
+
+  // Read Parallel Table of Indexes
+  for (unsigned i = 0; i != Header.NumBuckets; ++i) {
+    auto Index = IndexData.getU32(&Offset);
+    if (!Index)
+      continue;
+    Rows[i].Index = this;
+    Rows[i].Contributions =
+        llvm::make_unique<Entry::SectionContribution[]>(Header.NumColumns);
+    Contribs[Index - 1] = Rows[i].Contributions.get();
+  }
+
+  // Read the Column Headers
+  for (unsigned i = 0; i != Header.NumColumns; ++i) {
+    ColumnKinds[i] = static_cast<DWARFSectionKind>(IndexData.getU32(&Offset));
+    if (ColumnKinds[i] == InfoColumnKind) {
+      if (InfoColumn != -1)
+        return false;
+      InfoColumn = i;
+    }
+  }
+
+  if (InfoColumn == -1)
+    return false;
+
+  // Read Table of Section Offsets
+  for (unsigned i = 0; i != Header.NumUnits; ++i) {
+    auto *Contrib = Contribs[i];
+    for (unsigned i = 0; i != Header.NumColumns; ++i)
+      Contrib[i].Offset = IndexData.getU32(&Offset);
+  }
+
+  // Read Table of Section Sizes
+  for (unsigned i = 0; i != Header.NumUnits; ++i) {
+    auto *Contrib = Contribs[i];
+    for (unsigned i = 0; i != Header.NumColumns; ++i)
+      Contrib[i].Length = IndexData.getU32(&Offset);
+  }
+
   return true;
 }
 
-StringRef DWARFUnitIndex::getColumnHeader(DwarfSection DS) {
+StringRef DWARFUnitIndex::getColumnHeader(DWARFSectionKind DS) {
 #define CASE(DS)                                                               \
   case DW_SECT_##DS:                                                           \
     return #DS;
@@ -59,11 +115,54 @@ StringRef DWARFUnitIndex::getColumnHeader(DwarfSection DS) {
     CASE(MACINFO);
     CASE(MACRO);
   }
-  llvm_unreachable("unknown DwarfSection");
+  llvm_unreachable("unknown DWARFSectionKind");
 }
 
 void DWARFUnitIndex::dump(raw_ostream &OS) const {
+  if (!Header.NumBuckets)
+    return;
+
   Header.dump(OS);
+  OS << "Index Signature         ";
+  for (unsigned i = 0; i != Header.NumColumns; ++i)
+    OS << ' ' << left_justify(getColumnHeader(ColumnKinds[i]), 24);
+  OS << "\n----- ------------------";
+  for (unsigned i = 0; i != Header.NumColumns; ++i)
+    OS << " ------------------------";
+  OS << '\n';
+  for (unsigned i = 0; i != Header.NumBuckets; ++i) {
+    auto &Row = Rows[i];
+    if (auto *Contribs = Row.Contributions.get()) {
+      OS << format("%5u 0x%016" PRIx64 " ", i, Row.Signature);
+      for (unsigned i = 0; i != Header.NumColumns; ++i) {
+        auto &Contrib = Contribs[i];
+        OS << format("[0x%08x, 0x%08x) ", Contrib.Offset,
+                     Contrib.Offset + Contrib.Length);
+      }
+      OS << '\n';
+    }
+  }
 }
 
+const DWARFUnitIndex::Entry::SectionContribution *
+DWARFUnitIndex::Entry::getOffset(DWARFSectionKind Sec) const {
+  uint32_t i = 0;
+  for (; i != Index->Header.NumColumns; ++i)
+    if (Index->ColumnKinds[i] == Sec)
+      return &Contributions[i];
+  return nullptr;
+}
+const DWARFUnitIndex::Entry::SectionContribution *
+DWARFUnitIndex::Entry::getOffset() const {
+  return &Contributions[Index->InfoColumn];
+}
+
+const DWARFUnitIndex::Entry *
+DWARFUnitIndex::getFromOffset(uint32_t Offset) const {
+  for (uint32_t i = 0; i != Header.NumBuckets; ++i)
+    if (const auto &Contribs = Rows[i].Contributions)
+      if (Contribs[InfoColumn].Offset == Offset)
+        return &Rows[i];
+  return nullptr;
+}
 }