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llvm-project/lldb/source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.cpp

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//===-- DWARFCompileUnit.cpp ------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "DWARFCompileUnit.h"
#include "lldb/Core/Mangled.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/Stream.h"
#include "lldb/Core/StreamString.h"
#include "lldb/Core/Timer.h"
#include "lldb/Host/StringConvert.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Symbol/LineTable.h"
#include "lldb/Symbol/ObjectFile.h"
#include "Plugins/Language/ObjC/ObjCLanguage.h"
#include "DWARFDebugAbbrev.h"
#include "DWARFDebugAranges.h"
#include "DWARFDebugInfo.h"
#include "DWARFDIECollection.h"
#include "DWARFFormValue.h"
#include "LogChannelDWARF.h"
#include "NameToDIE.h"
#include "SymbolFileDWARF.h"
#include "SymbolFileDWARFDwo.h"
#include "SymbolFileDWARFDebugMap.h"
using namespace lldb;
using namespace lldb_private;
using namespace std;
extern int g_verbose;
DWARFCompileUnit::DWARFCompileUnit(SymbolFileDWARF* dwarf2Data) :
m_dwarf2Data (dwarf2Data),
m_abbrevs (NULL),
m_user_data (NULL),
m_die_array (),
m_func_aranges_ap (),
m_base_addr (0),
m_offset (DW_INVALID_OFFSET),
m_length (0),
m_version (0),
m_addr_size (DWARFCompileUnit::GetDefaultAddressSize()),
m_producer (eProducerInvalid),
m_producer_version_major (0),
m_producer_version_minor (0),
m_producer_version_update (0),
m_language_type (eLanguageTypeUnknown),
m_is_dwarf64 (false),
m_is_optimized (eLazyBoolCalculate),
m_addr_base (0),
m_base_obj_offset (DW_INVALID_OFFSET)
{
}
DWARFCompileUnit::~DWARFCompileUnit()
{}
void
DWARFCompileUnit::Clear()
{
m_offset = DW_INVALID_OFFSET;
m_length = 0;
m_version = 0;
m_abbrevs = NULL;
m_addr_size = DWARFCompileUnit::GetDefaultAddressSize();
m_base_addr = 0;
m_die_array.clear();
m_func_aranges_ap.reset();
m_user_data = NULL;
m_producer = eProducerInvalid;
m_language_type = eLanguageTypeUnknown;
m_is_dwarf64 = false;
m_is_optimized = eLazyBoolCalculate;
m_addr_base = 0;
m_base_obj_offset = DW_INVALID_OFFSET;
}
bool
DWARFCompileUnit::Extract(const DWARFDataExtractor &debug_info, lldb::offset_t *offset_ptr)
{
Clear();
m_offset = *offset_ptr;
if (debug_info.ValidOffset(*offset_ptr))
{
dw_offset_t abbr_offset;
const DWARFDebugAbbrev *abbr = m_dwarf2Data->DebugAbbrev();
m_length = debug_info.GetDWARFInitialLength(offset_ptr);
m_is_dwarf64 = debug_info.IsDWARF64();
m_version = debug_info.GetU16(offset_ptr);
abbr_offset = debug_info.GetDWARFOffset(offset_ptr);
m_addr_size = debug_info.GetU8 (offset_ptr);
bool length_OK = debug_info.ValidOffset(GetNextCompileUnitOffset()-1);
bool version_OK = SymbolFileDWARF::SupportedVersion(m_version);
bool abbr_offset_OK = m_dwarf2Data->get_debug_abbrev_data().ValidOffset(abbr_offset);
bool addr_size_OK = ((m_addr_size == 4) || (m_addr_size == 8));
if (length_OK && version_OK && addr_size_OK && abbr_offset_OK && abbr != NULL)
{
m_abbrevs = abbr->GetAbbreviationDeclarationSet(abbr_offset);
return true;
}
// reset the offset to where we tried to parse from if anything went wrong
*offset_ptr = m_offset;
}
return false;
}
void
DWARFCompileUnit::ClearDIEs(bool keep_compile_unit_die)
{
if (m_die_array.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
DWARFDebugInfoEntry::collection tmp_array;
m_die_array.swap(tmp_array);
if (keep_compile_unit_die)
m_die_array.push_back(tmp_array.front());
}
if (m_dwo_symbol_file)
m_dwo_symbol_file->GetCompileUnit()->ClearDIEs(keep_compile_unit_die);
}
//----------------------------------------------------------------------
// ParseCompileUnitDIEsIfNeeded
//
// Parses a compile unit and indexes its DIEs if it hasn't already been
// done.
//----------------------------------------------------------------------
size_t
DWARFCompileUnit::ExtractDIEsIfNeeded (bool cu_die_only)
{
const size_t initial_die_array_size = m_die_array.size();
if ((cu_die_only && initial_die_array_size > 0) || initial_die_array_size > 1)
return 0; // Already parsed
Timer scoped_timer (__PRETTY_FUNCTION__,
"%8.8x: DWARFCompileUnit::ExtractDIEsIfNeeded( cu_die_only = %i )",
m_offset,
cu_die_only);
// Set the offset to that of the first DIE and calculate the start of the
// next compilation unit header.
lldb::offset_t offset = GetFirstDIEOffset();
lldb::offset_t next_cu_offset = GetNextCompileUnitOffset();
DWARFDebugInfoEntry die;
// Keep a flat array of the DIE for binary lookup by DIE offset
if (!cu_die_only)
{
Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | DWARF_LOG_LOOKUPS));
if (log)
{
m_dwarf2Data->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace (log,
"DWARFCompileUnit::ExtractDIEsIfNeeded () for compile unit at .debug_info[0x%8.8x]",
GetOffset());
}
}
uint32_t depth = 0;
// We are in our compile unit, parse starting at the offset
// we were told to parse
const DWARFDataExtractor& debug_info_data = m_dwarf2Data->get_debug_info_data();
std::vector<uint32_t> die_index_stack;
die_index_stack.reserve(32);
die_index_stack.push_back(0);
bool prev_die_had_children = false;
DWARFFormValue::FixedFormSizes fixed_form_sizes =
DWARFFormValue::GetFixedFormSizesForAddressSize (GetAddressByteSize(), m_is_dwarf64);
while (offset < next_cu_offset &&
die.FastExtract (debug_info_data, this, fixed_form_sizes, &offset))
{
// if (log)
// log->Printf("0x%8.8x: %*.*s%s%s",
// die.GetOffset(),
// depth * 2, depth * 2, "",
// DW_TAG_value_to_name (die.Tag()),
// die.HasChildren() ? " *" : "");
const bool null_die = die.IsNULL();
if (depth == 0)
{
if (initial_die_array_size == 0)
AddCompileUnitDIE(die);
uint64_t base_addr = die.GetAttributeValueAsAddress(m_dwarf2Data, this, DW_AT_low_pc, LLDB_INVALID_ADDRESS);
if (base_addr == LLDB_INVALID_ADDRESS)
base_addr = die.GetAttributeValueAsAddress(m_dwarf2Data, this, DW_AT_entry_pc, 0);
SetBaseAddress (base_addr);
if (cu_die_only)
return 1;
}
else
{
if (null_die)
{
if (prev_die_had_children)
{
// This will only happen if a DIE says is has children
// but all it contains is a NULL tag. Since we are removing
// the NULL DIEs from the list (saves up to 25% in C++ code),
// we need a way to let the DIE know that it actually doesn't
// have children.
if (!m_die_array.empty())
m_die_array.back().SetEmptyChildren(true);
}
}
else
{
die.SetParentIndex(m_die_array.size() - die_index_stack[depth-1]);
if (die_index_stack.back())
m_die_array[die_index_stack.back()].SetSiblingIndex(m_die_array.size()-die_index_stack.back());
// Only push the DIE if it isn't a NULL DIE
m_die_array.push_back(die);
}
}
if (null_die)
{
// NULL DIE.
if (!die_index_stack.empty())
die_index_stack.pop_back();
if (depth > 0)
--depth;
if (depth == 0)
break; // We are done with this compile unit!
prev_die_had_children = false;
}
else
{
die_index_stack.back() = m_die_array.size() - 1;
// Normal DIE
const bool die_has_children = die.HasChildren();
if (die_has_children)
{
die_index_stack.push_back(0);
++depth;
}
prev_die_had_children = die_has_children;
}
}
// 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)
{
m_dwarf2Data->GetObjectFile()->GetModule()->ReportWarning ("DWARF compile unit extends beyond its bounds cu 0x%8.8x at 0x%8.8" PRIx64 "\n",
GetOffset(),
offset);
}
// Since std::vector objects will double their size, we really need to
// make a new array with the perfect size so we don't end up wasting
// space. So here we copy and swap to make sure we don't have any extra
// memory taken up.
if (m_die_array.size () < m_die_array.capacity())
{
DWARFDebugInfoEntry::collection exact_size_die_array (m_die_array.begin(), m_die_array.end());
exact_size_die_array.swap (m_die_array);
}
Log *verbose_log (LogChannelDWARF::GetLogIfAll (DWARF_LOG_DEBUG_INFO | DWARF_LOG_VERBOSE));
if (verbose_log)
{
StreamString strm;
Dump(&strm);
if (m_die_array.empty())
strm.Printf("error: no DIE for compile unit");
else
m_die_array[0].Dump(m_dwarf2Data, this, strm, UINT32_MAX);
verbose_log->PutCString (strm.GetString().c_str());
}
if (!m_dwo_symbol_file)
return m_die_array.size();
DWARFCompileUnit* dwo_cu = m_dwo_symbol_file->GetCompileUnit();
size_t dwo_die_count = dwo_cu->ExtractDIEsIfNeeded(cu_die_only);
return m_die_array.size() + dwo_die_count - 1; // We have 2 CU die, but we waht to count it only as one
}
void
DWARFCompileUnit::AddCompileUnitDIE(DWARFDebugInfoEntry& die)
{
assert (m_die_array.empty() && "Compile unit DIE already added");
AddDIE(die);
const DWARFDebugInfoEntry &cu_die = m_die_array.front();
std::unique_ptr<SymbolFileDWARFDwo> dwo_symbol_file = m_dwarf2Data->GetDwoSymbolFileForCompileUnit(*this, cu_die);
if (!dwo_symbol_file)
return;
DWARFCompileUnit* dwo_cu = dwo_symbol_file->GetCompileUnit();
if (!dwo_cu)
return; // Can't fetch the compile unit from the dwo file.
DWARFDIE dwo_cu_die = dwo_cu->GetCompileUnitDIEOnly();
if (!dwo_cu_die.IsValid())
return; // Can't fetch the compile unit DIE from the dwo file.
uint64_t main_dwo_id = cu_die.GetAttributeValueAsUnsigned(m_dwarf2Data,
this,
DW_AT_GNU_dwo_id,
0);
uint64_t sub_dwo_id = dwo_cu_die.GetAttributeValueAsUnsigned(DW_AT_GNU_dwo_id, 0);
if (main_dwo_id != sub_dwo_id)
return; // The 2 dwo ID isn't match. Don't use the dwo file as it belongs to a differectn compilation.
m_dwo_symbol_file = std::move(dwo_symbol_file);
dw_addr_t addr_base = cu_die.GetAttributeValueAsUnsigned(m_dwarf2Data,
this,
DW_AT_GNU_addr_base,
0);
dwo_cu->SetAddrBase(addr_base, m_offset);
}
dw_offset_t
DWARFCompileUnit::GetAbbrevOffset() const
{
return m_abbrevs ? m_abbrevs->GetOffset() : DW_INVALID_OFFSET;
}
bool
DWARFCompileUnit::Verify(Stream *s) const
{
const DWARFDataExtractor& debug_info = m_dwarf2Data->get_debug_info_data();
bool valid_offset = debug_info.ValidOffset(m_offset);
bool length_OK = debug_info.ValidOffset(GetNextCompileUnitOffset()-1);
bool version_OK = SymbolFileDWARF::SupportedVersion(m_version);
bool abbr_offset_OK = m_dwarf2Data->get_debug_abbrev_data().ValidOffset(GetAbbrevOffset());
bool addr_size_OK = ((m_addr_size == 4) || (m_addr_size == 8));
bool verbose = s->GetVerbose();
if (valid_offset && length_OK && version_OK && addr_size_OK && abbr_offset_OK)
{
if (verbose)
s->Printf(" 0x%8.8x: OK\n", m_offset);
return true;
}
else
{
s->Printf(" 0x%8.8x: ", m_offset);
m_dwarf2Data->get_debug_info_data().Dump (s, m_offset, lldb::eFormatHex, 1, Size(), 32, LLDB_INVALID_ADDRESS, 0, 0);
s->EOL();
if (valid_offset)
{
if (!length_OK)
s->Printf(" The length (0x%8.8x) for this compile unit is too large for the .debug_info provided.\n", m_length);
if (!version_OK)
s->Printf(" The 16 bit compile unit header version is not supported.\n");
if (!abbr_offset_OK)
s->Printf(" The offset into the .debug_abbrev section (0x%8.8x) is not valid.\n", GetAbbrevOffset());
if (!addr_size_OK)
s->Printf(" The address size is unsupported: 0x%2.2x\n", m_addr_size);
}
else
s->Printf(" The start offset of the compile unit header in the .debug_info is invalid.\n");
}
return false;
}
void
DWARFCompileUnit::Dump(Stream *s) const
{
s->Printf("0x%8.8x: Compile Unit: length = 0x%8.8x, version = 0x%4.4x, abbr_offset = 0x%8.8x, addr_size = 0x%2.2x (next CU at {0x%8.8x})\n",
m_offset, m_length, m_version, GetAbbrevOffset(), m_addr_size, GetNextCompileUnitOffset());
}
static uint8_t g_default_addr_size = 4;
uint8_t
DWARFCompileUnit::GetAddressByteSize(const DWARFCompileUnit* cu)
{
if (cu)
return cu->GetAddressByteSize();
return DWARFCompileUnit::GetDefaultAddressSize();
}
bool
DWARFCompileUnit::IsDWARF64(const DWARFCompileUnit* cu)
{
if (cu)
return cu->IsDWARF64();
return false;
}
uint8_t
DWARFCompileUnit::GetDefaultAddressSize()
{
return g_default_addr_size;
}
void
DWARFCompileUnit::SetDefaultAddressSize(uint8_t addr_size)
{
g_default_addr_size = addr_size;
}
lldb::user_id_t
DWARFCompileUnit::GetID () const
{
dw_offset_t local_id = m_base_obj_offset != DW_INVALID_OFFSET ? m_base_obj_offset : m_offset;
if (m_dwarf2Data)
return DIERef(local_id, local_id).GetUID(m_dwarf2Data);
else
return local_id;
}
void
DWARFCompileUnit::BuildAddressRangeTable (SymbolFileDWARF* dwarf2Data,
DWARFDebugAranges* debug_aranges)
{
// 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.
size_t num_debug_aranges = debug_aranges->GetNumRanges();
// First get the compile unit DIE only and check if it has a DW_AT_ranges
const DWARFDebugInfoEntry* die = GetCompileUnitDIEPtrOnly();
const dw_offset_t cu_offset = GetOffset();
if (die)
{
DWARFRangeList ranges;
const size_t num_ranges = die->GetAttributeAddressRanges(dwarf2Data, this, ranges, false);
if (num_ranges > 0)
{
// This compile unit has DW_AT_ranges, assume this is correct if it
// is present since clang no longer makes .debug_aranges by default
// and it emits DW_AT_ranges for DW_TAG_compile_units. GCC also does
// this with recent GCC builds.
for (size_t i=0; i<num_ranges; ++i)
{
const DWARFRangeList::Entry &range = ranges.GetEntryRef(i);
debug_aranges->AppendRange(cu_offset, range.GetRangeBase(), range.GetRangeEnd());
}
return; // We got all of our ranges from the DW_AT_ranges attribute
}
}
// We don't have a DW_AT_ranges attribute, so we need to parse the DWARF
// 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;
die = DIEPtr();
if (die)
die->BuildAddressRangeTable(dwarf2Data, this, debug_aranges);
if (debug_aranges->GetNumRanges() == num_debug_aranges)
{
// We got nothing from the functions, maybe we have a line tables only
// situation. Check the line tables and build the arange table from this.
SymbolContext sc;
sc.comp_unit = dwarf2Data->GetCompUnitForDWARFCompUnit(this);
if (sc.comp_unit)
{
SymbolFileDWARFDebugMap *debug_map_sym_file = m_dwarf2Data->GetDebugMapSymfile();
if (debug_map_sym_file == NULL)
{
LineTable *line_table = sc.comp_unit->GetLineTable();
if (line_table)
{
LineTable::FileAddressRanges file_ranges;
const bool append = true;
const size_t num_ranges = line_table->GetContiguousFileAddressRanges (file_ranges, append);
for (uint32_t idx=0; idx<num_ranges; ++idx)
{
const LineTable::FileAddressRanges::Entry &range = file_ranges.GetEntryRef(idx);
debug_aranges->AppendRange(cu_offset, range.GetRangeBase(), range.GetRangeEnd());
}
}
}
else
debug_map_sym_file->AddOSOARanges(dwarf2Data,debug_aranges);
}
}
if (debug_aranges->GetNumRanges() == num_debug_aranges)
{
// We got nothing from the functions, maybe we have a line tables only
// situation. Check the line tables and build the arange table from this.
SymbolContext sc;
sc.comp_unit = dwarf2Data->GetCompUnitForDWARFCompUnit(this);
if (sc.comp_unit)
{
LineTable *line_table = sc.comp_unit->GetLineTable();
if (line_table)
{
LineTable::FileAddressRanges file_ranges;
const bool append = true;
const size_t num_ranges = line_table->GetContiguousFileAddressRanges (file_ranges, append);
for (uint32_t idx=0; idx<num_ranges; ++idx)
{
const LineTable::FileAddressRanges::Entry &range = file_ranges.GetEntryRef(idx);
debug_aranges->AppendRange(GetOffset(), range.GetRangeBase(), range.GetRangeEnd());
}
}
}
}
// Keep memory down by clearing DIEs if this generate function
// caused them to be parsed
if (clear_dies)
ClearDIEs (true);
}
const DWARFDebugAranges &
DWARFCompileUnit::GetFunctionAranges ()
{
if (m_func_aranges_ap.get() == NULL)
{
m_func_aranges_ap.reset (new DWARFDebugAranges());
Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_ARANGES));
if (log)
{
m_dwarf2Data->GetObjectFile()->GetModule()->LogMessage (log,
"DWARFCompileUnit::GetFunctionAranges() for compile unit at .debug_info[0x%8.8x]",
GetOffset());
}
const DWARFDebugInfoEntry* die = DIEPtr();
if (die)
die->BuildFunctionAddressRangeTable (m_dwarf2Data, this, m_func_aranges_ap.get());
if (m_dwo_symbol_file)
{
DWARFCompileUnit* dwo_cu = m_dwo_symbol_file->GetCompileUnit();
const DWARFDebugInfoEntry* dwo_die = dwo_cu->DIEPtr();
if (dwo_die)
dwo_die->BuildFunctionAddressRangeTable (m_dwo_symbol_file.get(),
dwo_cu,
m_func_aranges_ap.get());
}
const bool minimize = false;
m_func_aranges_ap->Sort(minimize);
}
return *m_func_aranges_ap.get();
}
DWARFDIE
DWARFCompileUnit::LookupAddress (const dw_addr_t address)
{
if (DIE())
{
const DWARFDebugAranges &func_aranges = GetFunctionAranges ();
// Re-check the aranges auto pointer contents in case it was created above
if (!func_aranges.IsEmpty())
return GetDIE(func_aranges.FindAddress(address));
}
return DWARFDIE();
}
//----------------------------------------------------------------------
// Compare function DWARFDebugAranges::Range structures
//----------------------------------------------------------------------
static bool CompareDIEOffset (const DWARFDebugInfoEntry& die, const dw_offset_t die_offset)
{
return die.GetOffset() < die_offset;
}
//----------------------------------------------------------------------
// GetDIE()
//
// Get the DIE (Debug Information Entry) with the specified offset by
// first checking if the DIE is contained within this compile unit and
// grabbing the DIE from this compile unit. Otherwise we grab the DIE
// from the DWARF file.
//----------------------------------------------------------------------
DWARFDIE
DWARFCompileUnit::GetDIE (dw_offset_t die_offset)
{
if (die_offset != DW_INVALID_OFFSET)
{
if (m_dwo_symbol_file)
return m_dwo_symbol_file->GetCompileUnit()->GetDIE(die_offset);
if (ContainsDIEOffset(die_offset))
{
ExtractDIEsIfNeeded (false);
DWARFDebugInfoEntry::iterator end = m_die_array.end();
DWARFDebugInfoEntry::iterator pos = lower_bound(m_die_array.begin(), end, die_offset, CompareDIEOffset);
if (pos != end)
{
if (die_offset == (*pos).GetOffset())
return DWARFDIE(this, &(*pos));
}
}
else
{
// Don't specify the compile unit offset as we don't know it because the DIE belongs to
// a different compile unit in the same symbol file.
return m_dwarf2Data->DebugInfo()->GetDIEForDIEOffset(die_offset);
}
}
return DWARFDIE(); // Not found
}
size_t
DWARFCompileUnit::AppendDIEsWithTag (const dw_tag_t tag, DWARFDIECollection& dies, uint32_t depth) const
{
size_t old_size = dies.Size();
DWARFDebugInfoEntry::const_iterator pos;
DWARFDebugInfoEntry::const_iterator end = m_die_array.end();
for (pos = m_die_array.begin(); pos != end; ++pos)
{
if (pos->Tag() == tag)
dies.Append (DWARFDIE(this, &(*pos)));
}
// Return the number of DIEs added to the collection
return dies.Size() - old_size;
}
//void
//DWARFCompileUnit::AddGlobalDIEByIndex (uint32_t die_idx)
//{
// m_global_die_indexes.push_back (die_idx);
//}
//
//
//void
//DWARFCompileUnit::AddGlobal (const DWARFDebugInfoEntry* die)
//{
// // Indexes to all file level global and static variables
// m_global_die_indexes;
//
// if (m_die_array.empty())
// return;
//
// const DWARFDebugInfoEntry* first_die = &m_die_array[0];
// const DWARFDebugInfoEntry* end = first_die + m_die_array.size();
// if (first_die <= die && die < end)
// m_global_die_indexes.push_back (die - first_die);
//}
void
DWARFCompileUnit::Index (NameToDIE& func_basenames,
NameToDIE& func_fullnames,
NameToDIE& func_methods,
NameToDIE& func_selectors,
NameToDIE& objc_class_selectors,
NameToDIE& globals,
NameToDIE& types,
NameToDIE& namespaces)
{
Log *log (LogChannelDWARF::GetLogIfAll (DWARF_LOG_LOOKUPS));
if (log)
{
m_dwarf2Data->GetObjectFile()->GetModule()->LogMessage (log,
"DWARFCompileUnit::Index() for compile unit at .debug_info[0x%8.8x]",
GetOffset());
}
const LanguageType cu_language = GetLanguageType();
DWARFFormValue::FixedFormSizes fixed_form_sizes =
DWARFFormValue::GetFixedFormSizesForAddressSize (GetAddressByteSize(), m_is_dwarf64);
IndexPrivate(this,
cu_language,
fixed_form_sizes,
GetOffset(),
func_basenames,
func_fullnames,
func_methods,
func_selectors,
objc_class_selectors,
globals,
types,
namespaces);
SymbolFileDWARFDwo* dwo_symbol_file = GetDwoSymbolFile();
if (dwo_symbol_file)
{
IndexPrivate(dwo_symbol_file->GetCompileUnit(),
cu_language,
fixed_form_sizes,
GetOffset(),
func_basenames,
func_fullnames,
func_methods,
func_selectors,
objc_class_selectors,
globals,
types,
namespaces);
}
}
void
DWARFCompileUnit::IndexPrivate (DWARFCompileUnit* dwarf_cu,
const LanguageType cu_language,
const DWARFFormValue::FixedFormSizes& fixed_form_sizes,
const dw_offset_t cu_offset,
NameToDIE& func_basenames,
NameToDIE& func_fullnames,
NameToDIE& func_methods,
NameToDIE& func_selectors,
NameToDIE& objc_class_selectors,
NameToDIE& globals,
NameToDIE& types,
NameToDIE& namespaces)
{
DWARFDebugInfoEntry::const_iterator pos;
DWARFDebugInfoEntry::const_iterator begin = dwarf_cu->m_die_array.begin();
DWARFDebugInfoEntry::const_iterator end = dwarf_cu->m_die_array.end();
for (pos = begin; pos != end; ++pos)
{
const DWARFDebugInfoEntry &die = *pos;
const dw_tag_t tag = die.Tag();
switch (tag)
{
case DW_TAG_subprogram:
case DW_TAG_inlined_subroutine:
case DW_TAG_base_type:
case DW_TAG_class_type:
case DW_TAG_constant:
case DW_TAG_enumeration_type:
case DW_TAG_string_type:
case DW_TAG_subroutine_type:
case DW_TAG_structure_type:
case DW_TAG_union_type:
case DW_TAG_typedef:
case DW_TAG_namespace:
case DW_TAG_variable:
case DW_TAG_unspecified_type:
break;
default:
continue;
}
DWARFAttributes attributes;
const char *name = NULL;
const char *mangled_cstr = NULL;
bool is_declaration = false;
//bool is_artificial = false;
bool has_address = false;
bool has_location_or_const_value = false;
bool is_global_or_static_variable = false;
DWARFFormValue specification_die_form;
const size_t num_attributes = die.GetAttributes(dwarf_cu, fixed_form_sizes, attributes);
if (num_attributes > 0)
{
for (uint32_t i=0; i<num_attributes; ++i)
{
dw_attr_t attr = attributes.AttributeAtIndex(i);
DWARFFormValue form_value;
switch (attr)
{
case DW_AT_name:
if (attributes.ExtractFormValueAtIndex(i, form_value))
name = form_value.AsCString();
break;
case DW_AT_declaration:
if (attributes.ExtractFormValueAtIndex(i, form_value))
is_declaration = form_value.Unsigned() != 0;
break;
// case DW_AT_artificial:
// if (attributes.ExtractFormValueAtIndex(i, form_value))
// is_artificial = form_value.Unsigned() != 0;
// break;
case DW_AT_MIPS_linkage_name:
case DW_AT_linkage_name:
if (attributes.ExtractFormValueAtIndex(i, form_value))
mangled_cstr = form_value.AsCString();
break;
case DW_AT_low_pc:
case DW_AT_high_pc:
case DW_AT_ranges:
has_address = true;
break;
case DW_AT_entry_pc:
has_address = true;
break;
case DW_AT_location:
case DW_AT_const_value:
has_location_or_const_value = true;
if (tag == DW_TAG_variable)
{
const DWARFDebugInfoEntry* parent_die = die.GetParent();
while ( parent_die != NULL )
{
switch (parent_die->Tag())
{
case DW_TAG_subprogram:
case DW_TAG_lexical_block:
case DW_TAG_inlined_subroutine:
// Even if this is a function level static, we don't add it. We could theoretically
// add these if we wanted to by introspecting into the DW_AT_location and seeing
// if the location describes a hard coded address, but we dont want the performance
// penalty of that right now.
is_global_or_static_variable = false;
// if (attributes.ExtractFormValueAtIndex(dwarf2Data, i, form_value))
// {
// // If we have valid block data, then we have location expression bytes
// // that are fixed (not a location list).
// const uint8_t *block_data = form_value.BlockData();
// if (block_data)
// {
// uint32_t block_length = form_value.Unsigned();
// if (block_length == 1 + attributes.CompileUnitAtIndex(i)->GetAddressByteSize())
// {
// if (block_data[0] == DW_OP_addr)
// add_die = true;
// }
// }
// }
parent_die = NULL; // Terminate the while loop.
break;
case DW_TAG_compile_unit:
is_global_or_static_variable = true;
parent_die = NULL; // Terminate the while loop.
break;
default:
parent_die = parent_die->GetParent(); // Keep going in the while loop.
break;
}
}
}
break;
case DW_AT_specification:
if (attributes.ExtractFormValueAtIndex(i, form_value))
specification_die_form = form_value;
break;
}
}
}
switch (tag)
{
case DW_TAG_subprogram:
if (has_address)
{
if (name)
{
ObjCLanguage::MethodName objc_method(name, true);
if (objc_method.IsValid(true))
{
ConstString objc_class_name_with_category (objc_method.GetClassNameWithCategory());
ConstString objc_selector_name (objc_method.GetSelector());
ConstString objc_fullname_no_category_name (objc_method.GetFullNameWithoutCategory(true));
ConstString objc_class_name_no_category (objc_method.GetClassName());
func_fullnames.Insert (ConstString(name), DIERef(cu_offset, die.GetOffset()));
if (objc_class_name_with_category)
objc_class_selectors.Insert(objc_class_name_with_category, DIERef(cu_offset, die.GetOffset()));
if (objc_class_name_no_category && objc_class_name_no_category != objc_class_name_with_category)
objc_class_selectors.Insert(objc_class_name_no_category, DIERef(cu_offset, die.GetOffset()));
if (objc_selector_name)
func_selectors.Insert (objc_selector_name, DIERef(cu_offset, die.GetOffset()));
if (objc_fullname_no_category_name)
func_fullnames.Insert (objc_fullname_no_category_name, DIERef(cu_offset, die.GetOffset()));
}
// If we have a mangled name, then the DW_AT_name attribute
// is usually the method name without the class or any parameters
const DWARFDebugInfoEntry *parent = die.GetParent();
bool is_method = false;
if (parent)
{
dw_tag_t parent_tag = parent->Tag();
if (parent_tag == DW_TAG_class_type || parent_tag == DW_TAG_structure_type)
{
is_method = true;
}
else
{
if (specification_die_form.IsValid())
{
DWARFDIE specification_die = dwarf_cu->GetSymbolFileDWARF()->DebugInfo()->GetDIE (DIERef(specification_die_form));
if (specification_die.GetParent().IsStructOrClass())
is_method = true;
}
}
}
if (is_method)
func_methods.Insert (ConstString(name), DIERef(cu_offset, die.GetOffset()));
else
func_basenames.Insert (ConstString(name), DIERef(cu_offset, die.GetOffset()));
if (!is_method && !mangled_cstr && !objc_method.IsValid(true))
func_fullnames.Insert (ConstString(name), DIERef(cu_offset, die.GetOffset()));
}
if (mangled_cstr)
{
// Make sure our mangled name isn't the same string table entry
// as our name. If it starts with '_', then it is ok, else compare
// the string to make sure it isn't the same and we don't end up
// with duplicate entries
if (name != mangled_cstr && ((mangled_cstr[0] == '_') || (name && ::strcmp(name, mangled_cstr) != 0)))
{
Mangled mangled (ConstString(mangled_cstr), true);
func_fullnames.Insert (mangled.GetMangledName(), DIERef(cu_offset, die.GetOffset()));
ConstString demangled = mangled.GetDemangledName(cu_language);
if (demangled)
func_fullnames.Insert (demangled, DIERef(cu_offset, die.GetOffset()));
}
}
}
break;
case DW_TAG_inlined_subroutine:
if (has_address)
{
if (name)
func_basenames.Insert (ConstString(name), DIERef(cu_offset, die.GetOffset()));
if (mangled_cstr)
{
// Make sure our mangled name isn't the same string table entry
// as our name. If it starts with '_', then it is ok, else compare
// the string to make sure it isn't the same and we don't end up
// with duplicate entries
if (name != mangled_cstr && ((mangled_cstr[0] == '_') || (::strcmp(name, mangled_cstr) != 0)))
{
Mangled mangled (ConstString(mangled_cstr), true);
func_fullnames.Insert (mangled.GetMangledName(), DIERef(cu_offset, die.GetOffset()));
ConstString demangled = mangled.GetDemangledName(cu_language);
if (demangled)
func_fullnames.Insert (demangled, DIERef(cu_offset, die.GetOffset()));
}
}
else
func_fullnames.Insert (ConstString(name), DIERef(cu_offset, die.GetOffset()));
}
break;
case DW_TAG_base_type:
case DW_TAG_class_type:
case DW_TAG_constant:
case DW_TAG_enumeration_type:
case DW_TAG_string_type:
case DW_TAG_subroutine_type:
case DW_TAG_structure_type:
case DW_TAG_union_type:
case DW_TAG_typedef:
case DW_TAG_unspecified_type:
if (name && !is_declaration)
types.Insert (ConstString(name), DIERef(cu_offset, die.GetOffset()));
if (mangled_cstr && !is_declaration)
types.Insert (ConstString(mangled_cstr), DIERef(cu_offset, die.GetOffset()));
break;
case DW_TAG_namespace:
if (name)
namespaces.Insert (ConstString(name), DIERef(cu_offset, die.GetOffset()));
break;
case DW_TAG_variable:
if (name && has_location_or_const_value && is_global_or_static_variable)
{
globals.Insert (ConstString(name), DIERef(cu_offset, die.GetOffset()));
// Be sure to include variables by their mangled and demangled
// names if they have any since a variable can have a basename
// "i", a mangled named "_ZN12_GLOBAL__N_11iE" and a demangled
// mangled name "(anonymous namespace)::i"...
// Make sure our mangled name isn't the same string table entry
// as our name. If it starts with '_', then it is ok, else compare
// the string to make sure it isn't the same and we don't end up
// with duplicate entries
if (mangled_cstr && name != mangled_cstr && ((mangled_cstr[0] == '_') || (::strcmp(name, mangled_cstr) != 0)))
{
Mangled mangled (ConstString(mangled_cstr), true);
globals.Insert (mangled.GetMangledName(), DIERef(cu_offset, die.GetOffset()));
ConstString demangled = mangled.GetDemangledName(cu_language);
if (demangled)
globals.Insert (demangled, DIERef(cu_offset, die.GetOffset()));
}
}
break;
default:
continue;
}
}
}
bool
DWARFCompileUnit::Supports_unnamed_objc_bitfields ()
{
if (GetProducer() == eProducerClang)
{
const uint32_t major_version = GetProducerVersionMajor();
if (major_version > 425 || (major_version == 425 && GetProducerVersionUpdate() >= 13))
return true;
else
return false;
}
return true; // Assume all other compilers didn't have incorrect ObjC bitfield info
}
bool
DWARFCompileUnit::Supports_DW_AT_APPLE_objc_complete_type ()
{
if (GetProducer() == eProducerLLVMGCC)
return false;
return true;
}
bool
DWARFCompileUnit::DW_AT_decl_file_attributes_are_invalid()
{
// llvm-gcc makes completely invalid decl file attributes and won't ever
// be fixed, so we need to know to ignore these.
return GetProducer() == eProducerLLVMGCC;
}
void
DWARFCompileUnit::ParseProducerInfo ()
{
m_producer_version_major = UINT32_MAX;
m_producer_version_minor = UINT32_MAX;
m_producer_version_update = UINT32_MAX;
const DWARFDebugInfoEntry *die = GetCompileUnitDIEPtrOnly();
if (die)
{
const char *producer_cstr = die->GetAttributeValueAsString(m_dwarf2Data, this, DW_AT_producer, NULL);
if (producer_cstr)
{
RegularExpression llvm_gcc_regex("^4\\.[012]\\.[01] \\(Based on Apple Inc\\. build [0-9]+\\) \\(LLVM build [\\.0-9]+\\)$");
if (llvm_gcc_regex.Execute (producer_cstr))
{
m_producer = eProducerLLVMGCC;
}
else if (strstr(producer_cstr, "clang"))
{
static RegularExpression g_clang_version_regex("clang-([0-9]+)\\.([0-9]+)\\.([0-9]+)");
RegularExpression::Match regex_match(3);
if (g_clang_version_regex.Execute (producer_cstr, &regex_match))
{
std::string str;
if (regex_match.GetMatchAtIndex (producer_cstr, 1, str))
m_producer_version_major = StringConvert::ToUInt32(str.c_str(), UINT32_MAX, 10);
if (regex_match.GetMatchAtIndex (producer_cstr, 2, str))
m_producer_version_minor = StringConvert::ToUInt32(str.c_str(), UINT32_MAX, 10);
if (regex_match.GetMatchAtIndex (producer_cstr, 3, str))
m_producer_version_update = StringConvert::ToUInt32(str.c_str(), UINT32_MAX, 10);
}
m_producer = eProducerClang;
}
else if (strstr(producer_cstr, "GNU"))
m_producer = eProducerGCC;
}
}
if (m_producer == eProducerInvalid)
m_producer = eProcucerOther;
}
DWARFCompileUnit::Producer
DWARFCompileUnit::GetProducer ()
{
if (m_producer == eProducerInvalid)
ParseProducerInfo ();
return m_producer;
}
uint32_t
DWARFCompileUnit::GetProducerVersionMajor()
{
if (m_producer_version_major == 0)
ParseProducerInfo ();
return m_producer_version_major;
}
uint32_t
DWARFCompileUnit::GetProducerVersionMinor()
{
if (m_producer_version_minor == 0)
ParseProducerInfo ();
return m_producer_version_minor;
}
uint32_t
DWARFCompileUnit::GetProducerVersionUpdate()
{
if (m_producer_version_update == 0)
ParseProducerInfo ();
return m_producer_version_update;
}
LanguageType
DWARFCompileUnit::LanguageTypeFromDWARF(uint64_t val)
{
// Note: user languages between lo_user and hi_user
// must be handled explicitly here.
switch (val)
{
case DW_LANG_Mips_Assembler:
return eLanguageTypeMipsAssembler;
case DW_LANG_GOOGLE_RenderScript:
return eLanguageTypeExtRenderScript;
default:
return static_cast<LanguageType>(val);
}
}
LanguageType
DWARFCompileUnit::GetLanguageType()
{
if (m_language_type != eLanguageTypeUnknown)
return m_language_type;
const DWARFDebugInfoEntry *die = GetCompileUnitDIEPtrOnly();
if (die)
m_language_type = LanguageTypeFromDWARF(die->GetAttributeValueAsUnsigned(m_dwarf2Data, this, DW_AT_language, 0));
return m_language_type;
}
bool
DWARFCompileUnit::IsDWARF64() const
{
return m_is_dwarf64;
}
bool
DWARFCompileUnit::GetIsOptimized ()
{
if (m_is_optimized == eLazyBoolCalculate)
{
const DWARFDebugInfoEntry *die = GetCompileUnitDIEPtrOnly();
if (die)
{
m_is_optimized = eLazyBoolNo;
if (die->GetAttributeValueAsUnsigned (m_dwarf2Data, this, DW_AT_APPLE_optimized, 0) == 1)
{
m_is_optimized = eLazyBoolYes;
}
}
}
if (m_is_optimized == eLazyBoolYes)
{
return true;
}
else
{
return false;
}
}
DWARFFormValue::FixedFormSizes
DWARFCompileUnit::GetFixedFormSizes ()
{
return DWARFFormValue::GetFixedFormSizesForAddressSize (GetAddressByteSize(), IsDWARF64());
}
TypeSystem *
DWARFCompileUnit::GetTypeSystem ()
{
if (m_dwarf2Data)
return m_dwarf2Data->GetTypeSystemForLanguage(GetLanguageType());
else
return nullptr;
}
void
DWARFCompileUnit::SetUserData(void *d)
{
m_user_data = d;
if (m_dwo_symbol_file)
m_dwo_symbol_file->GetCompileUnit()->SetUserData(d);
}
void
DWARFCompileUnit::SetAddrBase(dw_addr_t addr_base, dw_offset_t base_obj_offset)
{
m_addr_base = addr_base;
m_base_obj_offset = base_obj_offset;
}
lldb::ByteOrder
DWARFCompileUnit::GetByteOrder() const
{
return m_dwarf2Data->GetObjectFile()->GetByteOrder();
}
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