DWARFDebugInfoEntry.cpp [plain text]
#include "DWARFDebugInfoEntry.h"
#include <assert.h>
#include <algorithm>
#include "lldb/Core/Module.h"
#include "lldb/Core/Stream.h"
#include "lldb/Expression/DWARFExpression.h"
#include "lldb/Symbol/ObjectFile.h"
#include "DWARFCompileUnit.h"
#include "SymbolFileDWARF.h"
#include "DWARFDebugAbbrev.h"
#include "DWARFDebugAranges.h"
#include "DWARFDebugInfo.h"
#include "DWARFDeclContext.h"
#include "DWARFDIECollection.h"
#include "DWARFFormValue.h"
#include "DWARFLocationDescription.h"
#include "DWARFLocationList.h"
#include "DWARFDebugRanges.h"
using namespace lldb_private;
using namespace std;
extern int g_verbose;
DWARFDebugInfoEntry::Attributes::Attributes() :
m_infos()
{
}
DWARFDebugInfoEntry::Attributes::~Attributes()
{
}
uint32_t
DWARFDebugInfoEntry::Attributes::FindAttributeIndex(dw_attr_t attr) const
{
collection::const_iterator end = m_infos.end();
collection::const_iterator beg = m_infos.begin();
collection::const_iterator pos;
for (pos = beg; pos != end; ++pos)
{
if (pos->attr == attr)
return std::distance(beg, pos);
}
return UINT32_MAX;
}
void
DWARFDebugInfoEntry::Attributes::Append(const DWARFCompileUnit *cu, dw_offset_t attr_die_offset, dw_attr_t attr, dw_form_t form)
{
Info info = { cu, attr_die_offset, attr, form };
m_infos.push_back(info);
}
bool
DWARFDebugInfoEntry::Attributes::ContainsAttribute(dw_attr_t attr) const
{
return FindAttributeIndex(attr) != UINT32_MAX;
}
bool
DWARFDebugInfoEntry::Attributes::RemoveAttribute(dw_attr_t attr)
{
uint32_t attr_index = FindAttributeIndex(attr);
if (attr_index != UINT32_MAX)
{
m_infos.erase(m_infos.begin() + attr_index);
return true;
}
return false;
}
bool
DWARFDebugInfoEntry::Attributes::ExtractFormValueAtIndex (SymbolFileDWARF* dwarf2Data, uint32_t i, DWARFFormValue &form_value) const
{
form_value.SetForm(FormAtIndex(i));
dw_offset_t offset = DIEOffsetAtIndex(i);
return form_value.ExtractValue(dwarf2Data->get_debug_info_data(), &offset, CompileUnitAtIndex(i));
}
uint64_t
DWARFDebugInfoEntry::Attributes::FormValueAsUnsigned (SymbolFileDWARF* dwarf2Data, dw_attr_t attr, uint64_t fail_value) const
{
const uint32_t attr_idx = FindAttributeIndex (attr);
if (attr_idx != UINT32_MAX)
return FormValueAsUnsignedAtIndex (dwarf2Data, attr_idx, fail_value);
return fail_value;
}
uint64_t
DWARFDebugInfoEntry::Attributes::FormValueAsUnsignedAtIndex(SymbolFileDWARF* dwarf2Data, uint32_t i, uint64_t fail_value) const
{
DWARFFormValue form_value;
if (ExtractFormValueAtIndex(dwarf2Data, i, form_value))
return form_value.Reference(CompileUnitAtIndex(i));
return fail_value;
}
bool
DWARFDebugInfoEntry::FastExtract
(
const DataExtractor& debug_info_data,
const DWARFCompileUnit* cu,
const uint8_t *fixed_form_sizes,
uint32_t* offset_ptr
)
{
m_offset = *offset_ptr;
m_parent_idx = 0;
m_sibling_idx = 0;
m_empty_children = false;
const uint64_t abbr_idx = debug_info_data.GetULEB128 (offset_ptr);
assert (abbr_idx < (1 << DIE_ABBR_IDX_BITSIZE));
m_abbr_idx = abbr_idx;
if (m_abbr_idx)
{
uint32_t offset = *offset_ptr;
const DWARFAbbreviationDeclaration *abbrevDecl = cu->GetAbbreviations()->GetAbbreviationDeclaration(m_abbr_idx);
if (abbrevDecl == NULL)
{
cu->GetSymbolFileDWARF()->GetObjectFile()->GetModule()->ReportError ("{0x%8.8x}: invalid abbreviation code %u, please file a bug and attach the file at the start of this error message",
m_offset,
(unsigned)abbr_idx);
*offset_ptr = UINT32_MAX;
return false;
}
m_tag = abbrevDecl->Tag();
m_has_children = abbrevDecl->HasChildren();
const uint32_t numAttributes = abbrevDecl->NumAttributes();
register uint32_t i;
register dw_form_t form;
for (i=0; i<numAttributes; ++i)
{
form = abbrevDecl->GetFormByIndexUnchecked(i);
const uint8_t fixed_skip_size = fixed_form_sizes [form];
if (fixed_skip_size)
offset += fixed_skip_size;
else
{
bool form_is_indirect = false;
do
{
form_is_indirect = false;
register uint32_t form_size = 0;
switch (form)
{
case DW_FORM_block : form_size = debug_info_data.GetULEB128 (&offset); break;
case DW_FORM_block1 : form_size = debug_info_data.GetU8_unchecked (&offset); break;
case DW_FORM_block2 : form_size = debug_info_data.GetU16_unchecked (&offset);break;
case DW_FORM_block4 : form_size = debug_info_data.GetU32_unchecked (&offset);break;
case DW_FORM_string :
debug_info_data.GetCStr (&offset);
break;
case DW_FORM_addr :
case DW_FORM_ref_addr :
form_size = cu->GetAddressByteSize();
break;
case DW_FORM_data1 :
case DW_FORM_flag :
case DW_FORM_ref1 :
form_size = 1;
break;
case DW_FORM_data2 :
case DW_FORM_ref2 :
form_size = 2;
break;
case DW_FORM_strp :
case DW_FORM_data4 :
case DW_FORM_ref4 :
form_size = 4;
break;
case DW_FORM_data8 :
case DW_FORM_ref8 :
form_size = 8;
break;
case DW_FORM_sdata :
case DW_FORM_udata :
case DW_FORM_ref_udata :
debug_info_data.Skip_LEB128 (&offset);
break;
case DW_FORM_indirect :
form_is_indirect = true;
form = debug_info_data.GetULEB128 (&offset);
break;
default:
*offset_ptr = m_offset;
return false;
}
offset += form_size;
} while (form_is_indirect);
}
}
*offset_ptr = offset;
return true;
}
else
{
m_tag = 0;
m_has_children = false;
return true; }
return false;
}
bool
DWARFDebugInfoEntry::Extract
(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
uint32_t* offset_ptr
)
{
const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data();
const uint32_t cu_end_offset = cu->GetNextCompileUnitOffset();
const uint8_t cu_addr_size = cu->GetAddressByteSize();
uint32_t offset = *offset_ptr;
if ((offset < cu_end_offset) && debug_info_data.ValidOffset(offset))
{
m_offset = offset;
const uint64_t abbr_idx = debug_info_data.GetULEB128(&offset);
assert (abbr_idx < (1 << DIE_ABBR_IDX_BITSIZE));
m_abbr_idx = abbr_idx;
if (abbr_idx)
{
const DWARFAbbreviationDeclaration *abbrevDecl = cu->GetAbbreviations()->GetAbbreviationDeclaration(abbr_idx);
if (abbrevDecl)
{
m_tag = abbrevDecl->Tag();
m_has_children = abbrevDecl->HasChildren();
bool isCompileUnitTag = m_tag == DW_TAG_compile_unit;
if (cu && isCompileUnitTag)
((DWARFCompileUnit*)cu)->SetBaseAddress(0);
const uint32_t numAttributes = abbrevDecl->NumAttributes();
uint32_t i;
dw_attr_t attr;
dw_form_t form;
for (i=0; i<numAttributes; ++i)
{
abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form);
if (isCompileUnitTag && ((attr == DW_AT_entry_pc) || (attr == DW_AT_low_pc)))
{
DWARFFormValue form_value(form);
if (form_value.ExtractValue(debug_info_data, &offset, cu))
{
if (attr == DW_AT_low_pc || attr == DW_AT_entry_pc)
((DWARFCompileUnit*)cu)->SetBaseAddress(form_value.Unsigned());
}
}
else
{
bool form_is_indirect = false;
do
{
form_is_indirect = false;
register uint32_t form_size = 0;
switch (form)
{
case DW_FORM_block : form_size = debug_info_data.GetULEB128(&offset); break;
case DW_FORM_block1 : form_size = debug_info_data.GetU8(&offset); break;
case DW_FORM_block2 : form_size = debug_info_data.GetU16(&offset); break;
case DW_FORM_block4 : form_size = debug_info_data.GetU32(&offset); break;
case DW_FORM_string : debug_info_data.GetCStr(&offset); break;
case DW_FORM_addr :
case DW_FORM_ref_addr :
form_size = cu_addr_size;
break;
case DW_FORM_data1 :
case DW_FORM_flag :
case DW_FORM_ref1 :
form_size = 1;
break;
case DW_FORM_data2 :
case DW_FORM_ref2 :
form_size = 2;
break;
case DW_FORM_strp :
form_size = 4;
break;
case DW_FORM_data4 :
case DW_FORM_ref4 :
form_size = 4;
break;
case DW_FORM_data8 :
case DW_FORM_ref8 :
form_size = 8;
break;
case DW_FORM_sdata :
case DW_FORM_udata :
case DW_FORM_ref_udata :
debug_info_data.Skip_LEB128(&offset);
break;
case DW_FORM_indirect :
form = debug_info_data.GetULEB128(&offset);
form_is_indirect = true;
break;
default:
*offset_ptr = offset;
return false;
}
offset += form_size;
} while (form_is_indirect);
}
}
*offset_ptr = offset;
return true;
}
}
else
{
m_tag = 0;
m_has_children = false;
*offset_ptr = offset;
return true; }
}
return false;
}
void
DWARFDebugInfoEntry::DumpAncestry
(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const DWARFDebugInfoEntry* oldest,
Stream &s,
uint32_t recurse_depth
) const
{
const DWARFDebugInfoEntry* parent = GetParent();
if (parent && parent != oldest)
parent->DumpAncestry(dwarf2Data, cu, oldest, s, 0);
Dump(dwarf2Data, cu, s, recurse_depth);
}
bool
DWARFDebugInfoEntry::GetDIENamesAndRanges
(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const char * &name,
const char * &mangled,
DWARFDebugRanges::RangeList& ranges,
int& decl_file,
int& decl_line,
int& decl_column,
int& call_file,
int& call_line,
int& call_column,
DWARFExpression *frame_base
) const
{
if (dwarf2Data == NULL)
return false;
dw_addr_t lo_pc = DW_INVALID_ADDRESS;
dw_addr_t hi_pc = DW_INVALID_ADDRESS;
std::vector<dw_offset_t> die_offsets;
bool set_frame_base_loclist_addr = false;
dw_offset_t offset;
const DWARFAbbreviationDeclaration* abbrevDecl = GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset);
if (abbrevDecl)
{
const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data();
if (!debug_info_data.ValidOffset(offset))
return false;
const uint32_t numAttributes = abbrevDecl->NumAttributes();
uint32_t i;
dw_attr_t attr;
dw_form_t form;
for (i=0; i<numAttributes; ++i)
{
abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form);
DWARFFormValue form_value(form);
if (form_value.ExtractValue(debug_info_data, &offset, cu))
{
switch (attr)
{
case DW_AT_low_pc:
case DW_AT_entry_pc:
lo_pc = form_value.Unsigned();
break;
case DW_AT_high_pc:
hi_pc = form_value.Unsigned();
break;
case DW_AT_ranges:
{
const DWARFDebugRanges* debug_ranges = dwarf2Data->DebugRanges();
debug_ranges->FindRanges(form_value.Unsigned(), ranges);
ranges.Slide(cu->GetBaseAddress());
}
break;
case DW_AT_name:
if (name == NULL)
name = form_value.AsCString(&dwarf2Data->get_debug_str_data());
break;
case DW_AT_MIPS_linkage_name:
if (mangled == NULL)
mangled = form_value.AsCString(&dwarf2Data->get_debug_str_data());
break;
case DW_AT_abstract_origin:
die_offsets.push_back(form_value.Reference(cu));
break;
case DW_AT_specification:
die_offsets.push_back(form_value.Reference(cu));
break;
case DW_AT_decl_file:
if (decl_file == 0)
decl_file = form_value.Unsigned();
break;
case DW_AT_decl_line:
if (decl_line == 0)
decl_line = form_value.Unsigned();
break;
case DW_AT_decl_column:
if (decl_column == 0)
decl_column = form_value.Unsigned();
break;
case DW_AT_call_file:
if (call_file == 0)
call_file = form_value.Unsigned();
break;
case DW_AT_call_line:
if (call_line == 0)
call_line = form_value.Unsigned();
break;
case DW_AT_call_column:
if (call_column == 0)
call_column = form_value.Unsigned();
break;
case DW_AT_frame_base:
if (frame_base)
{
if (form_value.BlockData())
{
uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
uint32_t block_length = form_value.Unsigned();
frame_base->SetOpcodeData(debug_info_data, block_offset, block_length);
}
else
{
const DataExtractor &debug_loc_data = dwarf2Data->get_debug_loc_data();
const dw_offset_t debug_loc_offset = form_value.Unsigned();
size_t loc_list_length = DWARFLocationList::Size(debug_loc_data, debug_loc_offset);
if (loc_list_length > 0)
{
frame_base->SetOpcodeData(debug_loc_data, debug_loc_offset, loc_list_length);
if (lo_pc != DW_INVALID_ADDRESS)
{
assert (lo_pc >= cu->GetBaseAddress());
frame_base->SetLocationListSlide(lo_pc - cu->GetBaseAddress());
}
else
{
set_frame_base_loclist_addr = true;
}
}
}
}
break;
default:
break;
}
}
}
}
if (ranges.IsEmpty())
{
if (lo_pc != DW_INVALID_ADDRESS)
{
if (hi_pc != DW_INVALID_ADDRESS && hi_pc > lo_pc)
ranges.Append(DWARFDebugRanges::Range (lo_pc, hi_pc - lo_pc));
else
ranges.Append(DWARFDebugRanges::Range (lo_pc, 0));
}
}
if (set_frame_base_loclist_addr)
{
dw_addr_t lowest_range_pc = ranges.GetMinRangeBase(0);
assert (lowest_range_pc >= cu->GetBaseAddress());
frame_base->SetLocationListSlide (lowest_range_pc - cu->GetBaseAddress());
}
if (ranges.IsEmpty() || name == NULL || mangled == NULL)
{
std::vector<dw_offset_t>::const_iterator pos;
std::vector<dw_offset_t>::const_iterator end = die_offsets.end();
for (pos = die_offsets.begin(); pos != end; ++pos)
{
DWARFCompileUnitSP cu_sp_ptr;
const DWARFDebugInfoEntry* die = NULL;
dw_offset_t die_offset = *pos;
if (die_offset != DW_INVALID_OFFSET)
{
die = dwarf2Data->DebugInfo()->GetDIEPtr(die_offset, &cu_sp_ptr);
if (die)
die->GetDIENamesAndRanges(dwarf2Data, cu_sp_ptr.get(), name, mangled, ranges, decl_file, decl_line, decl_column, call_file, call_line, call_column);
}
}
}
return !ranges.IsEmpty();
}
void
DWARFDebugInfoEntry::Dump
(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
Stream &s,
uint32_t recurse_depth
) const
{
const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data();
uint32_t offset = m_offset;
if (debug_info_data.ValidOffset(offset))
{
dw_uleb128_t abbrCode = debug_info_data.GetULEB128(&offset);
s.Printf("\n0x%8.8x: ", m_offset);
s.Indent();
if (abbrCode != m_abbr_idx)
{
s.Printf( "error: DWARF has been modified\n");
}
else if (abbrCode)
{
const DWARFAbbreviationDeclaration* abbrevDecl = cu->GetAbbreviations()->GetAbbreviationDeclaration (abbrCode);
if (abbrevDecl)
{
s.PutCString(DW_TAG_value_to_name(abbrevDecl->Tag()));
s.Printf( " [%u] %c\n", abbrCode, abbrevDecl->HasChildren() ? '*':' ');
const uint32_t numAttributes = abbrevDecl->NumAttributes();
uint32_t i;
dw_attr_t attr;
dw_form_t form;
for (i=0; i<numAttributes; ++i)
{
abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form);
DumpAttribute(dwarf2Data, cu, debug_info_data, &offset, s, attr, form);
}
const DWARFDebugInfoEntry* child = GetFirstChild();
if (recurse_depth > 0 && child)
{
s.IndentMore();
while (child)
{
child->Dump(dwarf2Data, cu, s, recurse_depth-1);
child = child->GetSibling();
}
s.IndentLess();
}
}
else
s.Printf( "Abbreviation code note found in 'debug_abbrev' class for code: %u\n", abbrCode);
}
else
{
s.Printf( "NULL\n");
}
}
}
void
DWARFDebugInfoEntry::DumpLocation
(
SymbolFileDWARF* dwarf2Data,
DWARFCompileUnit* cu,
Stream &s
) const
{
const DWARFDebugInfoEntry *cu_die = cu->GetCompileUnitDIEOnly();
const char *cu_name = NULL;
if (cu_die != NULL)
cu_name = cu_die->GetName (dwarf2Data, cu);
const char *obj_file_name = NULL;
ObjectFile *obj_file = dwarf2Data->GetObjectFile();
if (obj_file)
obj_file_name = obj_file->GetFileSpec().GetFilename().AsCString();
const char *die_name = GetName (dwarf2Data, cu);
s.Printf ("0x%8.8x/0x%8.8x: %-30s (from %s in %s)",
cu->GetOffset(),
GetOffset(),
die_name ? die_name : "",
cu_name ? cu_name : "<NULL>",
obj_file_name ? obj_file_name : "<NULL>");
}
void
DWARFDebugInfoEntry::DumpAttribute
(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const DataExtractor& debug_info_data,
uint32_t* offset_ptr,
Stream &s,
dw_attr_t attr,
dw_form_t form
)
{
bool verbose = s.GetVerbose();
bool show_form = s.GetFlags().Test(DWARFDebugInfo::eDumpFlag_ShowForm);
const DataExtractor* debug_str_data = dwarf2Data ? &dwarf2Data->get_debug_str_data() : NULL;
if (verbose)
s.Offset (*offset_ptr);
else
s.Printf (" ");
s.Indent(DW_AT_value_to_name(attr));
if (show_form)
{
s.Printf( "[%s", DW_FORM_value_to_name(form));
}
DWARFFormValue form_value(form);
if (!form_value.ExtractValue(debug_info_data, offset_ptr, cu))
return;
if (show_form)
{
if (form == DW_FORM_indirect)
{
s.Printf( " [%s]", DW_FORM_value_to_name(form_value.Form()));
}
s.PutCString("] ");
}
s.PutCString("( ");
if (verbose)
{
form_value.Dump(s, debug_str_data, cu);
}
switch (attr)
{
case DW_AT_stmt_list:
if ( verbose ) s.PutCString(" ( ");
s.Printf( "0x%8.8llx", form_value.Unsigned());
if ( verbose ) s.PutCString(" )");
break;
case DW_AT_language:
if ( verbose ) s.PutCString(" ( ");
s.PutCString(DW_LANG_value_to_name(form_value.Unsigned()));
if ( verbose ) s.PutCString(" )");
break;
case DW_AT_encoding:
if ( verbose ) s.PutCString(" ( ");
s.PutCString(DW_ATE_value_to_name(form_value.Unsigned()));
if ( verbose ) s.PutCString(" )");
break;
case DW_AT_frame_base:
case DW_AT_location:
case DW_AT_data_member_location:
{
const uint8_t* blockData = form_value.BlockData();
if (blockData)
{
if (!verbose)
form_value.Dump(s, debug_str_data, cu);
DataExtractor locationData(debug_info_data, (*offset_ptr) - form_value.Unsigned(), form_value.Unsigned());
if ( verbose ) s.PutCString(" ( ");
print_dwarf_expression (s, locationData, DWARFCompileUnit::GetAddressByteSize(cu), 4, false);
if ( verbose ) s.PutCString(" )");
}
else
{
uint64_t debug_loc_offset = form_value.Unsigned();
if (dwarf2Data)
{
if ( !verbose )
form_value.Dump(s, debug_str_data, cu);
DWARFLocationList::Dump(s, cu, dwarf2Data->get_debug_loc_data(), debug_loc_offset);
}
else
{
if ( !verbose )
form_value.Dump(s, NULL, cu);
}
}
}
break;
case DW_AT_abstract_origin:
case DW_AT_specification:
{
uint64_t abstract_die_offset = form_value.Reference(cu);
form_value.Dump(s, debug_str_data, cu);
if ( verbose ) s.PutCString(" ( ");
GetName(dwarf2Data, cu, abstract_die_offset, s);
if ( verbose ) s.PutCString(" )");
}
break;
case DW_AT_type:
{
uint64_t type_die_offset = form_value.Reference(cu);
if (!verbose)
form_value.Dump(s, debug_str_data, cu);
s.PutCString(" ( ");
AppendTypeName(dwarf2Data, cu, type_die_offset, s);
s.PutCString(" )");
}
break;
case DW_AT_ranges:
{
if ( !verbose )
form_value.Dump(s, debug_str_data, cu);
uint32_t ranges_offset = form_value.Unsigned();
dw_addr_t base_addr = cu ? cu->GetBaseAddress() : 0;
DWARFDebugRanges::Dump(s, dwarf2Data->get_debug_ranges_data(), &ranges_offset, base_addr);
}
break;
default:
if ( !verbose )
form_value.Dump(s, debug_str_data, cu);
break;
}
s.PutCString(" )\n");
}
size_t
DWARFDebugInfoEntry::GetAttributes
(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const uint8_t *fixed_form_sizes,
DWARFDebugInfoEntry::Attributes& attributes,
uint32_t curr_depth
) const
{
uint32_t offset;
const DWARFAbbreviationDeclaration* abbrevDecl = GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset);
if (abbrevDecl)
{
const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data();
if (fixed_form_sizes == NULL)
fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize(cu->GetAddressByteSize());
const uint32_t num_attributes = abbrevDecl->NumAttributes();
uint32_t i;
dw_attr_t attr;
dw_form_t form;
DWARFFormValue form_value;
for (i=0; i<num_attributes; ++i)
{
abbrevDecl->GetAttrAndFormByIndexUnchecked (i, attr, form);
switch (attr)
{
case DW_AT_sibling:
case DW_AT_declaration:
if (curr_depth > 0)
{
break;
}
default:
attributes.Append(cu, offset, attr, form);
break;
}
if ((attr == DW_AT_specification) || (attr == DW_AT_abstract_origin))
{
form_value.SetForm(form);
if (form_value.ExtractValue(debug_info_data, &offset, cu))
{
const DWARFDebugInfoEntry* die = NULL;
dw_offset_t die_offset = form_value.Reference(cu);
if (cu->ContainsDIEOffset(die_offset))
{
die = const_cast<DWARFCompileUnit*>(cu)->GetDIEPtr(die_offset);
if (die)
die->GetAttributes(dwarf2Data, cu, fixed_form_sizes, attributes, curr_depth + 1);
}
else
{
DWARFCompileUnitSP cu_sp_ptr;
die = const_cast<SymbolFileDWARF*>(dwarf2Data)->DebugInfo()->GetDIEPtr(die_offset, &cu_sp_ptr);
if (die)
die->GetAttributes(dwarf2Data, cu_sp_ptr.get(), fixed_form_sizes, attributes, curr_depth + 1);
}
}
}
else
{
const uint8_t fixed_skip_size = fixed_form_sizes [form];
if (fixed_skip_size)
offset += fixed_skip_size;
else
DWARFFormValue::SkipValue(form, debug_info_data, &offset, cu);
}
}
}
else
{
attributes.Clear();
}
return attributes.Size();
}
dw_offset_t
DWARFDebugInfoEntry::GetAttributeValue
(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const dw_attr_t attr,
DWARFFormValue& form_value,
dw_offset_t* end_attr_offset_ptr
) const
{
uint32_t offset;
const DWARFAbbreviationDeclaration* abbrevDecl = GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset);
if (abbrevDecl)
{
uint32_t attr_idx = abbrevDecl->FindAttributeIndex(attr);
if (attr_idx != DW_INVALID_INDEX)
{
const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data();
uint32_t idx=0;
while (idx<attr_idx)
DWARFFormValue::SkipValue(abbrevDecl->GetFormByIndex(idx++), debug_info_data, &offset, cu);
const dw_offset_t attr_offset = offset;
form_value.SetForm(abbrevDecl->GetFormByIndex(idx));
if (form_value.ExtractValue(debug_info_data, &offset, cu))
{
if (end_attr_offset_ptr)
*end_attr_offset_ptr = offset;
return attr_offset;
}
}
}
return 0;
}
const char*
DWARFDebugInfoEntry::GetAttributeValueAsString
(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const dw_attr_t attr,
const char* fail_value) const
{
DWARFFormValue form_value;
if (GetAttributeValue(dwarf2Data, cu, attr, form_value))
return form_value.AsCString(&dwarf2Data->get_debug_str_data());
return fail_value;
}
uint64_t
DWARFDebugInfoEntry::GetAttributeValueAsUnsigned
(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const dw_attr_t attr,
uint64_t fail_value
) const
{
DWARFFormValue form_value;
if (GetAttributeValue(dwarf2Data, cu, attr, form_value))
return form_value.Unsigned();
return fail_value;
}
int64_t
DWARFDebugInfoEntry::GetAttributeValueAsSigned
(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const dw_attr_t attr,
int64_t fail_value
) const
{
DWARFFormValue form_value;
if (GetAttributeValue(dwarf2Data, cu, attr, form_value))
return form_value.Signed();
return fail_value;
}
uint64_t
DWARFDebugInfoEntry::GetAttributeValueAsReference
(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const dw_attr_t attr,
uint64_t fail_value
) const
{
DWARFFormValue form_value;
if (GetAttributeValue(dwarf2Data, cu, attr, form_value))
return form_value.Reference(cu);
return fail_value;
}
dw_offset_t
DWARFDebugInfoEntry::GetAttributeValueAsLocation
(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const dw_attr_t attr,
DataExtractor& location_data,
uint32_t &block_size
) const
{
block_size = 0;
DWARFFormValue form_value;
location_data.Clear();
dw_offset_t end_addr_offset = DW_INVALID_OFFSET;
const dw_offset_t attr_offset = GetAttributeValue(dwarf2Data, cu, attr, form_value, &end_addr_offset);
if (attr_offset)
{
const uint8_t* blockData = form_value.BlockData();
if (blockData)
{
const DataExtractor& debug_info = dwarf2Data->get_debug_info_data();
dw_offset_t block_offset = blockData - debug_info.GetDataStart();
block_size = (end_addr_offset - attr_offset) - form_value.Unsigned();
location_data.SetData(debug_info, block_offset, block_size);
}
else
{
dw_offset_t debug_loc_offset = form_value.Unsigned();
if (dwarf2Data)
{
assert(dwarf2Data->get_debug_loc_data().GetAddressByteSize() == cu->GetAddressByteSize());
return DWARFLocationList::Extract(dwarf2Data->get_debug_loc_data(), &debug_loc_offset, location_data);
}
}
}
return attr_offset;
}
const char*
DWARFDebugInfoEntry::GetName
(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu
) const
{
DWARFFormValue form_value;
if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value))
return form_value.AsCString(&dwarf2Data->get_debug_str_data());
return NULL;
}
const char*
DWARFDebugInfoEntry::GetMangledName
(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
bool substitute_name_allowed
) const
{
const char* name = NULL;
DWARFFormValue form_value;
if (GetAttributeValue(dwarf2Data, cu, DW_AT_MIPS_linkage_name, form_value))
name = form_value.AsCString(&dwarf2Data->get_debug_str_data());
if (substitute_name_allowed && name == NULL)
{
if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value))
name = form_value.AsCString(&dwarf2Data->get_debug_str_data());
}
return name;
}
const char*
DWARFDebugInfoEntry::GetPubname
(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu
) const
{
const char* name = NULL;
DWARFFormValue form_value;
if (GetAttributeValue(dwarf2Data, cu, DW_AT_MIPS_linkage_name, form_value))
name = form_value.AsCString(&dwarf2Data->get_debug_str_data());
else if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value))
name = form_value.AsCString(&dwarf2Data->get_debug_str_data());
else if (GetAttributeValue(dwarf2Data, cu, DW_AT_specification, form_value))
{
DWARFCompileUnitSP cu_sp_ptr;
const DWARFDebugInfoEntry* die = const_cast<SymbolFileDWARF*>(dwarf2Data)->DebugInfo()->GetDIEPtr(form_value.Reference(cu), &cu_sp_ptr);
if (die)
return die->GetPubname(dwarf2Data, cu_sp_ptr.get());
}
return name;
}
bool
DWARFDebugInfoEntry::GetName
(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const uint32_t die_offset,
Stream &s
)
{
DWARFDebugInfoEntry die;
uint32_t offset = die_offset;
if (die.Extract(dwarf2Data, cu, &offset))
{
if (die.IsNULL())
{
s.PutCString("NULL");
return true;
}
else
{
DWARFFormValue form_value;
if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value))
{
const char* name = form_value.AsCString(&dwarf2Data->get_debug_str_data());
if (name)
{
s.PutCString(name);
return true;
}
}
}
}
return false;
}
bool
DWARFDebugInfoEntry::AppendTypeName
(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const uint32_t die_offset,
Stream &s
)
{
DWARFDebugInfoEntry die;
uint32_t offset = die_offset;
if (die.Extract(dwarf2Data, cu, &offset))
{
if (die.IsNULL())
{
s.PutCString("NULL");
return true;
}
else
{
const char* name = die.GetPubname(dwarf2Data, cu);
if (name)
s.PutCString(name);
else
{
bool result = true;
const DWARFAbbreviationDeclaration* abbrevDecl = die.GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset);
switch (abbrevDecl->Tag())
{
case DW_TAG_array_type: break; case DW_TAG_base_type: s.PutCString("base "); break;
case DW_TAG_class_type: s.PutCString("class "); break;
case DW_TAG_const_type: s.PutCString("const "); break;
case DW_TAG_enumeration_type: s.PutCString("enum "); break;
case DW_TAG_file_type: s.PutCString("file "); break;
case DW_TAG_interface_type: s.PutCString("interface "); break;
case DW_TAG_packed_type: s.PutCString("packed "); break;
case DW_TAG_pointer_type: break; case DW_TAG_ptr_to_member_type: break; case DW_TAG_reference_type: break; case DW_TAG_restrict_type: s.PutCString("restrict "); break;
case DW_TAG_set_type: s.PutCString("set "); break;
case DW_TAG_shared_type: s.PutCString("shared "); break;
case DW_TAG_string_type: s.PutCString("string "); break;
case DW_TAG_structure_type: s.PutCString("struct "); break;
case DW_TAG_subrange_type: s.PutCString("subrange "); break;
case DW_TAG_subroutine_type: s.PutCString("function "); break;
case DW_TAG_thrown_type: s.PutCString("thrown "); break;
case DW_TAG_union_type: s.PutCString("union "); break;
case DW_TAG_unspecified_type: s.PutCString("unspecified "); break;
case DW_TAG_volatile_type: s.PutCString("volatile "); break;
default:
return false;
}
DWARFFormValue form_value;
if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_type, form_value))
{
uint64_t next_die_offset = form_value.Reference(cu);
result = AppendTypeName(dwarf2Data, cu, next_die_offset, s);
}
switch (abbrevDecl->Tag())
{
case DW_TAG_array_type: s.PutCString("[]"); break;
case DW_TAG_pointer_type: s.PutChar('*'); break;
case DW_TAG_ptr_to_member_type: s.PutChar('*'); break;
case DW_TAG_reference_type: s.PutChar('&'); break;
default:
break;
}
return result;
}
}
}
return false;
}
bool
DWARFDebugInfoEntry::Contains (const DWARFDebugInfoEntry *die) const
{
if (die)
{
const dw_offset_t die_offset = die->GetOffset();
if (die_offset > GetOffset())
{
const DWARFDebugInfoEntry *sibling = GetSibling();
assert (sibling); if (sibling)
return die_offset < sibling->GetOffset();
}
}
return false;
}
void
DWARFDebugInfoEntry::BuildAddressRangeTable
(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
DWARFDebugAranges* debug_aranges
) const
{
if (m_tag)
{
if (m_tag == DW_TAG_subprogram)
{
dw_addr_t hi_pc = DW_INVALID_ADDRESS;
dw_addr_t lo_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_low_pc, DW_INVALID_ADDRESS);
if (lo_pc != DW_INVALID_ADDRESS)
hi_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_high_pc, DW_INVALID_ADDRESS);
if (hi_pc != DW_INVALID_ADDRESS)
{
debug_aranges->AppendRange (cu->GetOffset(), lo_pc, hi_pc);
}
}
const DWARFDebugInfoEntry* child = GetFirstChild();
while (child)
{
child->BuildAddressRangeTable(dwarf2Data, cu, debug_aranges);
child = child->GetSibling();
}
}
}
void
DWARFDebugInfoEntry::BuildFunctionAddressRangeTable
(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
DWARFDebugAranges* debug_aranges
) const
{
if (m_tag)
{
if (m_tag == DW_TAG_subprogram)
{
dw_addr_t hi_pc = DW_INVALID_ADDRESS;
dw_addr_t lo_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_low_pc, DW_INVALID_ADDRESS);
if (lo_pc != DW_INVALID_ADDRESS)
hi_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_high_pc, DW_INVALID_ADDRESS);
if (hi_pc != DW_INVALID_ADDRESS)
{
debug_aranges->AppendRange (GetOffset(), lo_pc, hi_pc);
}
}
const DWARFDebugInfoEntry* child = GetFirstChild();
while (child)
{
child->BuildFunctionAddressRangeTable(dwarf2Data, cu, debug_aranges);
child = child->GetSibling();
}
}
}
void
DWARFDebugInfoEntry::GetDeclContextDIEs (SymbolFileDWARF* dwarf2Data,
DWARFCompileUnit* cu,
DWARFDIECollection &decl_context_dies) const
{
const DWARFDebugInfoEntry *parent_decl_ctx_die = GetParentDeclContextDIE (dwarf2Data, cu);
if (parent_decl_ctx_die && parent_decl_ctx_die != this)
{
decl_context_dies.Append(parent_decl_ctx_die);
parent_decl_ctx_die->GetDeclContextDIEs (dwarf2Data, cu, decl_context_dies);
}
}
void
DWARFDebugInfoEntry::GetDWARFDeclContext (SymbolFileDWARF* dwarf2Data,
DWARFCompileUnit* cu,
DWARFDeclContext &dwarf_decl_ctx) const
{
const dw_tag_t tag = Tag();
if (tag != DW_TAG_compile_unit)
{
dwarf_decl_ctx.AppendDeclContext(tag, GetName(dwarf2Data, cu));
const DWARFDebugInfoEntry *parent_decl_ctx_die = GetParentDeclContextDIE (dwarf2Data, cu);
if (parent_decl_ctx_die && parent_decl_ctx_die != this)
{
if (parent_decl_ctx_die->Tag() != DW_TAG_compile_unit)
parent_decl_ctx_die->GetDWARFDeclContext (dwarf2Data, cu, dwarf_decl_ctx);
}
}
}
bool
DWARFDebugInfoEntry::MatchesDWARFDeclContext (SymbolFileDWARF* dwarf2Data,
DWARFCompileUnit* cu,
const DWARFDeclContext &dwarf_decl_ctx) const
{
DWARFDeclContext this_dwarf_decl_ctx;
GetDWARFDeclContext (dwarf2Data, cu, this_dwarf_decl_ctx);
return this_dwarf_decl_ctx == dwarf_decl_ctx;
}
const DWARFDebugInfoEntry *
DWARFDebugInfoEntry::GetParentDeclContextDIE (SymbolFileDWARF* dwarf2Data,
DWARFCompileUnit* cu) const
{
DWARFDebugInfoEntry::Attributes attributes;
GetAttributes(dwarf2Data, cu, NULL, attributes);
return GetParentDeclContextDIE (dwarf2Data, cu, attributes);
}
const DWARFDebugInfoEntry *
DWARFDebugInfoEntry::GetParentDeclContextDIE (SymbolFileDWARF* dwarf2Data,
DWARFCompileUnit* cu,
const DWARFDebugInfoEntry::Attributes& attributes) const
{
const DWARFDebugInfoEntry * die = this;
while (die != NULL)
{
if (die != this)
{
switch (die->Tag())
{
case DW_TAG_compile_unit:
case DW_TAG_namespace:
case DW_TAG_structure_type:
case DW_TAG_union_type:
case DW_TAG_class_type:
return die;
default:
break;
}
}
dw_offset_t die_offset;
die_offset = attributes.FormValueAsUnsigned(dwarf2Data, DW_AT_specification, DW_INVALID_OFFSET);
if (die_offset != DW_INVALID_OFFSET)
{
const DWARFDebugInfoEntry *spec_die = cu->GetDIEPtr (die_offset);
if (spec_die)
{
const DWARFDebugInfoEntry *spec_die_decl_ctx_die = spec_die->GetParentDeclContextDIE (dwarf2Data, cu);
if (spec_die_decl_ctx_die)
return spec_die_decl_ctx_die;
}
}
die_offset = attributes.FormValueAsUnsigned(dwarf2Data, DW_AT_abstract_origin, DW_INVALID_OFFSET);
if (die_offset != DW_INVALID_OFFSET)
{
const DWARFDebugInfoEntry *abs_die = cu->GetDIEPtr (die_offset);
if (abs_die)
{
const DWARFDebugInfoEntry *abs_die_decl_ctx_die = abs_die->GetParentDeclContextDIE (dwarf2Data, cu);
if (abs_die_decl_ctx_die)
return abs_die_decl_ctx_die;
}
}
die = die->GetParent();
}
return NULL;
}
const char *
DWARFDebugInfoEntry::GetQualifiedName (SymbolFileDWARF* dwarf2Data,
DWARFCompileUnit* cu,
std::string &storage) const
{
DWARFDebugInfoEntry::Attributes attributes;
GetAttributes(dwarf2Data, cu, NULL, attributes);
return GetQualifiedName (dwarf2Data, cu, attributes, storage);
}
const char*
DWARFDebugInfoEntry::GetQualifiedName (SymbolFileDWARF* dwarf2Data,
DWARFCompileUnit* cu,
const DWARFDebugInfoEntry::Attributes& attributes,
std::string &storage) const
{
const char *name = GetName (dwarf2Data, cu);
if (name)
{
const DWARFDebugInfoEntry *parent_decl_ctx_die = GetParentDeclContextDIE (dwarf2Data, cu);
storage.clear();
while (parent_decl_ctx_die)
{
const dw_tag_t parent_tag = parent_decl_ctx_die->Tag();
switch (parent_tag)
{
case DW_TAG_namespace:
{
const char *namespace_name = parent_decl_ctx_die->GetName (dwarf2Data, cu);
if (namespace_name)
{
storage.insert (0, "::");
storage.insert (0, namespace_name);
}
else
{
storage.insert (0, "(anonymous namespace)::");
}
parent_decl_ctx_die = parent_decl_ctx_die->GetParentDeclContextDIE(dwarf2Data, cu);
}
break;
case DW_TAG_class_type:
case DW_TAG_structure_type:
case DW_TAG_union_type:
{
const char *class_union_struct_name = parent_decl_ctx_die->GetName (dwarf2Data, cu);
if (class_union_struct_name)
{
storage.insert (0, "::");
storage.insert (0, class_union_struct_name);
}
parent_decl_ctx_die = parent_decl_ctx_die->GetParentDeclContextDIE(dwarf2Data, cu);
}
break;
default:
parent_decl_ctx_die = NULL;
break;
}
}
if (storage.empty())
storage.append ("::");
storage.append (name);
}
if (storage.empty())
return NULL;
return storage.c_str();
}
bool
DWARFDebugInfoEntry::LookupAddress
(
const dw_addr_t address,
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
DWARFDebugInfoEntry** function_die,
DWARFDebugInfoEntry** block_die
)
{
bool found_address = false;
if (m_tag)
{
bool check_children = false;
bool match_addr_range = false;
switch (m_tag)
{
case DW_TAG_array_type : break;
case DW_TAG_class_type : check_children = true; break;
case DW_TAG_entry_point : break;
case DW_TAG_enumeration_type : break;
case DW_TAG_formal_parameter : break;
case DW_TAG_imported_declaration : break;
case DW_TAG_label : break;
case DW_TAG_lexical_block : check_children = true; match_addr_range = true; break;
case DW_TAG_member : break;
case DW_TAG_pointer_type : break;
case DW_TAG_reference_type : break;
case DW_TAG_compile_unit : match_addr_range = true; break;
case DW_TAG_string_type : break;
case DW_TAG_structure_type : check_children = true; break;
case DW_TAG_subroutine_type : break;
case DW_TAG_typedef : break;
case DW_TAG_union_type : break;
case DW_TAG_unspecified_parameters : break;
case DW_TAG_variant : break;
case DW_TAG_common_block : check_children = true; break;
case DW_TAG_common_inclusion : break;
case DW_TAG_inheritance : break;
case DW_TAG_inlined_subroutine : check_children = true; match_addr_range = true; break;
case DW_TAG_module : match_addr_range = true; break;
case DW_TAG_ptr_to_member_type : break;
case DW_TAG_set_type : break;
case DW_TAG_subrange_type : break;
case DW_TAG_with_stmt : break;
case DW_TAG_access_declaration : break;
case DW_TAG_base_type : break;
case DW_TAG_catch_block : match_addr_range = true; break;
case DW_TAG_const_type : break;
case DW_TAG_constant : break;
case DW_TAG_enumerator : break;
case DW_TAG_file_type : break;
case DW_TAG_friend : break;
case DW_TAG_namelist : break;
case DW_TAG_namelist_item : break;
case DW_TAG_packed_type : break;
case DW_TAG_subprogram : match_addr_range = true; break;
case DW_TAG_template_type_parameter : break;
case DW_TAG_template_value_parameter : break;
case DW_TAG_thrown_type : break;
case DW_TAG_try_block : match_addr_range = true; break;
case DW_TAG_variant_part : break;
case DW_TAG_variable : break;
case DW_TAG_volatile_type : break;
case DW_TAG_dwarf_procedure : break;
case DW_TAG_restrict_type : break;
case DW_TAG_interface_type : break;
case DW_TAG_namespace : check_children = true; break;
case DW_TAG_imported_module : break;
case DW_TAG_unspecified_type : break;
case DW_TAG_partial_unit : break;
case DW_TAG_imported_unit : break;
case DW_TAG_shared_type : break;
default: break;
}
if (match_addr_range)
{
dw_addr_t lo_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_low_pc, DW_INVALID_ADDRESS);
if (lo_pc != DW_INVALID_ADDRESS)
{
dw_addr_t hi_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_high_pc, DW_INVALID_ADDRESS);
if (hi_pc != DW_INVALID_ADDRESS)
{
if ((lo_pc <= address) && (address < hi_pc))
{
found_address = true;
switch (m_tag)
{
case DW_TAG_compile_unit: check_children = ((function_die != NULL) || (block_die != NULL));
break;
case DW_TAG_subprogram: if (function_die)
*function_die = this;
check_children = (block_die != NULL);
break;
case DW_TAG_inlined_subroutine: case DW_TAG_lexical_block: if (block_die)
{
*block_die = this;
check_children = true;
}
break;
default:
check_children = true;
break;
}
}
}
else
{ check_children = (m_tag == DW_TAG_compile_unit) && ((function_die != NULL) || (block_die != NULL));
}
}
else
{
dw_offset_t debug_ranges_offset = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_ranges, DW_INVALID_OFFSET);
if (debug_ranges_offset != DW_INVALID_OFFSET)
{
DWARFDebugRanges::RangeList ranges;
DWARFDebugRanges* debug_ranges = dwarf2Data->DebugRanges();
debug_ranges->FindRanges(debug_ranges_offset, ranges);
ranges.Slide (cu->GetBaseAddress());
if (ranges.FindEntryThatContains(address))
{
found_address = true;
switch (m_tag)
{
case DW_TAG_compile_unit: check_children = ((function_die != NULL) || (block_die != NULL));
break;
case DW_TAG_subprogram: if (function_die)
*function_die = this;
check_children = (block_die != NULL);
break;
case DW_TAG_inlined_subroutine: case DW_TAG_lexical_block: if (block_die)
{
*block_die = this;
check_children = true;
}
break;
default:
check_children = true;
break;
}
}
else
{
check_children = false;
}
}
}
}
if (check_children)
{
DWARFDebugInfoEntry* child = GetFirstChild();
while (child)
{
if (child->LookupAddress(address, dwarf2Data, cu, function_die, block_die))
return true;
child = child->GetSibling();
}
}
}
return found_address;
}
const DWARFAbbreviationDeclaration*
DWARFDebugInfoEntry::GetAbbreviationDeclarationPtr (SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit *cu,
dw_offset_t &offset) const
{
offset = GetOffset();
const DWARFAbbreviationDeclaration* abbrev_decl = cu->GetAbbreviations()->GetAbbreviationDeclaration (m_abbr_idx);
if (abbrev_decl)
{
const uint64_t abbrev_code = dwarf2Data->get_debug_info_data().GetULEB128 (&offset);
if (abbrev_decl->Code() == abbrev_code)
return abbrev_decl;
dwarf2Data->GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("0x%8.8x: the DWARF debug information has been modified (abbrev code was %u, and is now %u)",
GetOffset(),
(uint32_t)abbrev_decl->Code(),
(uint32_t)abbrev_code);
}
offset = DW_INVALID_OFFSET;
return NULL;
}
bool
DWARFDebugInfoEntry::OffsetLessThan (const DWARFDebugInfoEntry& a, const DWARFDebugInfoEntry& b)
{
return a.GetOffset() < b.GetOffset();
}
void
DWARFDebugInfoEntry::DumpDIECollection (Stream &strm, DWARFDebugInfoEntry::collection &die_collection)
{
DWARFDebugInfoEntry::const_iterator pos;
DWARFDebugInfoEntry::const_iterator end = die_collection.end();
strm.PutCString("\noffset parent sibling child\n");
strm.PutCString("-------- -------- -------- --------\n");
for (pos = die_collection.begin(); pos != end; ++pos)
{
const DWARFDebugInfoEntry& die_ref = *pos;
const DWARFDebugInfoEntry* p = die_ref.GetParent();
const DWARFDebugInfoEntry* s = die_ref.GetSibling();
const DWARFDebugInfoEntry* c = die_ref.GetFirstChild();
strm.Printf("%.8x: %.8x %.8x %.8x 0x%4.4x %s%s\n",
die_ref.GetOffset(),
p ? p->GetOffset() : 0,
s ? s->GetOffset() : 0,
c ? c->GetOffset() : 0,
die_ref.Tag(),
DW_TAG_value_to_name(die_ref.Tag()),
die_ref.HasChildren() ? " *" : "");
}
}