X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FDebugInfo%2FDWARFCompileUnit.cpp;h=33869d8c998e3ac0d45c15d9b0ad6f98dcecaa75;hb=9ddf28d501144276fb47ce2e5f48f2497d9898d5;hp=d535df05d3b5bb29d7db3b10b5c10ae9a94d3a2f;hpb=10df80692cc1594fb06fc02cae6eba177123cfd9;p=oota-llvm.git

diff --git a/lib/DebugInfo/DWARFCompileUnit.cpp b/lib/DebugInfo/DWARFCompileUnit.cpp
index d535df05d3b..33869d8c998 100644
--- a/lib/DebugInfo/DWARFCompileUnit.cpp
+++ b/lib/DebugInfo/DWARFCompileUnit.cpp
@@ -8,232 +8,25 @@
 //===----------------------------------------------------------------------===//
 
 #include "DWARFCompileUnit.h"
-#include "DWARFContext.h"
-#include "DWARFFormValue.h"
-#include "llvm/Support/Dwarf.h"
 #include "llvm/Support/Format.h"
 #include "llvm/Support/raw_ostream.h"
-using namespace llvm;
-using namespace dwarf;
-
-DataExtractor DWARFCompileUnit::getDebugInfoExtractor() const {
-  return DataExtractor(Context.getInfoSection(),
-                       Context.isLittleEndian(), getAddressByteSize());
-}
-
-bool DWARFCompileUnit::extract(DataExtractor debug_info, uint32_t *offset_ptr) {
-  clear();
-
-  Offset = *offset_ptr;
-
-  if (debug_info.isValidOffset(*offset_ptr)) {
-    uint64_t abbrOffset;
-    const DWARFDebugAbbrev *abbr = Context.getDebugAbbrev();
-    Length = debug_info.getU32(offset_ptr);
-    Version = debug_info.getU16(offset_ptr);
-    abbrOffset = debug_info.getU32(offset_ptr);
-    AddrSize = debug_info.getU8(offset_ptr);
-
-    bool lengthOK = debug_info.isValidOffset(getNextCompileUnitOffset()-1);
-    bool versionOK = DWARFContext::isSupportedVersion(Version);
-    bool abbrOffsetOK = Context.getAbbrevSection().size() > abbrOffset;
-    bool addrSizeOK = AddrSize == 4 || AddrSize == 8;
-
-    if (lengthOK && versionOK && addrSizeOK && abbrOffsetOK && abbr != NULL) {
-      Abbrevs = abbr->getAbbreviationDeclarationSet(abbrOffset);
-      return true;
-    }
-
-    // reset the offset to where we tried to parse from if anything went wrong
-    *offset_ptr = Offset;
-  }
-
-  return false;
-}
 
-uint32_t
-DWARFCompileUnit::extract(uint32_t offset, DataExtractor debug_info_data,
-                          const DWARFAbbreviationDeclarationSet *abbrevs) {
-  clear();
-
-  Offset = offset;
-
-  if (debug_info_data.isValidOffset(offset)) {
-    Length = debug_info_data.getU32(&offset);
-    Version = debug_info_data.getU16(&offset);
-    bool abbrevsOK = debug_info_data.getU32(&offset) == abbrevs->getOffset();
-    Abbrevs = abbrevs;
-    AddrSize = debug_info_data.getU8 (&offset);
-
-    bool versionOK = DWARFContext::isSupportedVersion(Version);
-    bool addrSizeOK = AddrSize == 4 || AddrSize == 8;
-
-    if (versionOK && addrSizeOK && abbrevsOK &&
-        debug_info_data.isValidOffset(offset))
-      return offset;
-  }
-  return 0;
-}
-
-void DWARFCompileUnit::clear() {
-  Offset = 0;
-  Length = 0;
-  Version = 0;
-  Abbrevs = 0;
-  AddrSize = 0;
-  BaseAddr = 0;
-  DieArray.clear();
-}
+using namespace llvm;
 
 void DWARFCompileUnit::dump(raw_ostream &OS) {
-  OS << format("0x%08x", Offset) << ": Compile Unit:"
-     << " length = " << format("0x%08x", Length)
-     << " version = " << format("0x%04x", Version)
-     << " abbr_offset = " << format("0x%04x", Abbrevs->getOffset())
-     << " addr_size = " << format("0x%02x", AddrSize)
-     << " (next CU at " << format("0x%08x", getNextCompileUnitOffset())
+  OS << format("0x%08x", getOffset()) << ": Compile Unit:"
+     << " length = " << format("0x%08x", getLength())
+     << " version = " << format("0x%04x", getVersion())
+     << " abbr_offset = " << format("0x%04x", getAbbreviations()->getOffset())
+     << " addr_size = " << format("0x%02x", getAddressByteSize())
+     << " (next unit at " << format("0x%08x", getNextUnitOffset())
      << ")\n";
 
-  extractDIEsIfNeeded(false);
-  DieArray[0].dump(OS, this, -1U);
+  const DWARFDebugInfoEntryMinimal *CU = getCompileUnitDIE(false);
+  assert(CU && "Null Compile Unit?");
+  CU->dump(OS, this, -1U);
 }
 
-void DWARFCompileUnit::setDIERelations() {
-  if (DieArray.empty())
-    return;
-  DWARFDebugInfoEntryMinimal *die_array_begin = &DieArray.front();
-  DWARFDebugInfoEntryMinimal *die_array_end = &DieArray.back();
-  DWARFDebugInfoEntryMinimal *curr_die;
-  // We purposely are skipping the last element in the array in the loop below
-  // so that we can always have a valid next item
-  for (curr_die = die_array_begin; curr_die < die_array_end; ++curr_die) {
-    // Since our loop doesn't include the last element, we can always
-    // safely access the next die in the array.
-    DWARFDebugInfoEntryMinimal *next_die = curr_die + 1;
-
-    const DWARFAbbreviationDeclaration *curr_die_abbrev =
-      curr_die->getAbbreviationDeclarationPtr();
-
-    if (curr_die_abbrev) {
-      // Normal DIE
-      if (curr_die_abbrev->hasChildren())
-        next_die->setParent(curr_die);
-      else
-        curr_die->setSibling(next_die);
-    } else {
-      // NULL DIE that terminates a sibling chain
-      DWARFDebugInfoEntryMinimal *parent = curr_die->getParent();
-      if (parent)
-        parent->setSibling(next_die);
-    }
-  }
-
-  // Since we skipped the last element, we need to fix it up!
-  if (die_array_begin < die_array_end)
-    curr_die->setParent(die_array_begin);
-}
-
-size_t DWARFCompileUnit::extractDIEsIfNeeded(bool cu_die_only) {
-  const size_t initial_die_array_size = DieArray.size();
-  if ((cu_die_only && initial_die_array_size > 0) ||
-      initial_die_array_size > 1)
-    return 0; // Already parsed
-
-  // Set the offset to that of the first DIE and calculate the start of the
-  // next compilation unit header.
-  uint32_t offset = getFirstDIEOffset();
-  uint32_t next_cu_offset = getNextCompileUnitOffset();
-
-  DWARFDebugInfoEntryMinimal die;
-  // Keep a flat array of the DIE for binary lookup by DIE offset
-  uint32_t depth = 0;
-  // We are in our compile unit, parse starting at the offset
-  // we were told to parse
-
-  const uint8_t *fixed_form_sizes =
-    DWARFFormValue::getFixedFormSizesForAddressSize(getAddressByteSize());
-
-  while (offset < next_cu_offset &&
-         die.extractFast(this, fixed_form_sizes, &offset)) {
-
-    if (depth == 0) {
-      uint64_t base_addr =
-        die.getAttributeValueAsUnsigned(this, DW_AT_low_pc, -1U);
-      if (base_addr == -1U)
-        base_addr = die.getAttributeValueAsUnsigned(this, DW_AT_entry_pc, 0);
-      setBaseAddress(base_addr);
-    }
-
-    if (cu_die_only) {
-      addDIE(die);
-      return 1;
-    }
-    else if (depth == 0 && initial_die_array_size == 1) {
-      // Don't append the CU die as we already did that
-    } else {
-      addDIE (die);
-    }
-
-    const DWARFAbbreviationDeclaration *abbrDecl =
-      die.getAbbreviationDeclarationPtr();
-    if (abbrDecl) {
-      // Normal DIE
-      if (abbrDecl->hasChildren())
-        ++depth;
-    } else {
-      // NULL DIE.
-      if (depth > 0)
-        --depth;
-      if (depth == 0)
-        break;  // We are done with this compile unit!
-    }
-
-  }
-
-  // Give a little bit of info if we encounter corrupt DWARF (our offset
-  // should always terminate at or before the start of the next compilation
-  // unit header).
-  if (offset > next_cu_offset) {
-    fprintf (stderr, "warning: DWARF compile unit extends beyond its bounds cu 0x%8.8x at 0x%8.8x'\n", getOffset(), offset);
-  }
-
-  setDIERelations();
-  return DieArray.size();
-}
-
-void DWARFCompileUnit::clearDIEs(bool keep_compile_unit_die) {
-  if (DieArray.size() > 1) {
-    // std::vectors never get any smaller when resized to a smaller size,
-    // or when clear() or erase() are called, the size will report that it
-    // is smaller, but the memory allocated remains intact (call capacity()
-    // to see this). So we need to create a temporary vector and swap the
-    // contents which will cause just the internal pointers to be swapped
-    // so that when "tmp_array" goes out of scope, it will destroy the
-    // contents.
-
-    // Save at least the compile unit DIE
-    std::vector<DWARFDebugInfoEntryMinimal> tmpArray;
-    DieArray.swap(tmpArray);
-    if (keep_compile_unit_die)
-      DieArray.push_back(tmpArray.front());
-  }
-}
-
-void
-DWARFCompileUnit::buildAddressRangeTable(DWARFDebugAranges *debug_aranges,
-                                         bool clear_dies_if_already_not_parsed){
-  // This function is usually called if there in no .debug_aranges section
-  // in order to produce a compile unit level set of address ranges that
-  // is accurate. If the DIEs weren't parsed, then we don't want all dies for
-  // all compile units to stay loaded when they weren't needed. So we can end
-  // up parsing the DWARF and then throwing them all away to keep memory usage
-  // down.
-  const bool clear_dies = extractDIEsIfNeeded(false) > 1;
-
-  DieArray[0].buildAddressRangeTable(this, debug_aranges);
-
-  // Keep memory down by clearing DIEs if this generate function
-  // caused them to be parsed.
-  if (clear_dies)
-    clearDIEs(true);
+// VTable anchor.
+DWARFCompileUnit::~DWARFCompileUnit() {
 }