//===----------------------------------------------------------------------===//
#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);
- for (unsigned i = 0, e = DieArray.size(); i != e; ++i)
- DieArray[i].dump(OS, this, 10);
+ 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();
+// VTable anchor.
+DWARFCompileUnit::~DWARFCompileUnit() {
}
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