void DWARFCompileUnit::extractDIEsToVector(
bool AppendCUDie, bool AppendNonCUDies,
std::vector<DWARFDebugInfoEntryMinimal> &Dies) const {
if (!AppendCUDie && !AppendNonCUDies)
return;
// 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 NextCUOffset = getNextCompileUnitOffset();
DWARFDebugInfoEntryMinimal DIE;
uint32_t Depth = 0;
const uint8_t *FixedFormSizes =
DWARFFormValue::getFixedFormSizes(getAddressByteSize(), getVersion());
bool IsCUDie = true;
while (Offset < NextCUOffset &&
DIE.extractFast(this, FixedFormSizes, &Offset)) {
if (IsCUDie) {
if (AppendCUDie)
Dies.push_back(DIE);
if (!AppendNonCUDies)
break;
// The average bytes per DIE entry has been seen to be
// around 14-20 so let's pre-reserve the needed memory for
// our DIE entries accordingly.
Dies.reserve(Dies.size() + getDebugInfoSize() / 14);
IsCUDie = false;
} else {
Dies.push_back(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 > NextCUOffset)
fprintf(stderr, "warning: DWARF compile unit extends beyond its "
"bounds cu 0x%8.8x at 0x%8.8x'\n", getOffset(), Offset);
}
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::getFixedFormSizes(getAddressByteSize(), getVersion());
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();
}
