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linux-packaging-mono/external/llvm-project/lldb/source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.cpp
Xamarin Public Jenkins (auto-signing) 468663ddbb Imported Upstream version 6.10.0.49 
Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b
2020-01-16 16:38:04 +00:00

1112 lines
41 KiB
C++
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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 "Plugins/Language/ObjC/ObjCLanguage.h"
#include "lldb/Core/DumpDataExtractor.h"
#include "lldb/Core/Mangled.h"
#include "lldb/Core/Module.h"
#include "lldb/Host/StringConvert.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Symbol/LineTable.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Utility/Stream.h"
#include "lldb/Utility/StreamString.h"
#include "lldb/Utility/Timer.h"
#include "DWARFDIECollection.h"
#include "DWARFDebugAbbrev.h"
#include "DWARFDebugAranges.h"
#include "DWARFDebugInfo.h"
#include "DWARFFormValue.h"
#include "LogChannelDWARF.h"
#include "NameToDIE.h"
#include "SymbolFileDWARF.h"
#include "SymbolFileDWARFDebugMap.h"
#include "SymbolFileDWARFDwo.h"
using namespace lldb;
using namespace lldb_private;
using namespace std;
extern int g_verbose;
DWARFCompileUnit::DWARFCompileUnit(SymbolFileDWARF *dwarf2Data)
: m_dwarf2Data(dwarf2Data) {}
DWARFCompileUnit::~DWARFCompileUnit() {}
DWARFCompileUnitSP DWARFCompileUnit::Extract(SymbolFileDWARF *dwarf2Data,
lldb::offset_t *offset_ptr) {
DWARFCompileUnitSP cu_sp(new DWARFCompileUnit(dwarf2Data));
// Out of memory?
if (cu_sp.get() == NULL)
return nullptr;
const DWARFDataExtractor &debug_info = dwarf2Data->get_debug_info_data();
cu_sp->m_offset = *offset_ptr;
if (debug_info.ValidOffset(*offset_ptr)) {
dw_offset_t abbr_offset;
const DWARFDebugAbbrev *abbr = dwarf2Data->DebugAbbrev();
cu_sp->m_length = debug_info.GetDWARFInitialLength(offset_ptr);
cu_sp->m_is_dwarf64 = debug_info.IsDWARF64();
cu_sp->m_version = debug_info.GetU16(offset_ptr);
abbr_offset = debug_info.GetDWARFOffset(offset_ptr);
cu_sp->m_addr_size = debug_info.GetU8(offset_ptr);
bool length_OK =
debug_info.ValidOffset(cu_sp->GetNextCompileUnitOffset() - 1);
bool version_OK = SymbolFileDWARF::SupportedVersion(cu_sp->m_version);
bool abbr_offset_OK =
dwarf2Data->get_debug_abbrev_data().ValidOffset(abbr_offset);
bool addr_size_OK = (cu_sp->m_addr_size == 4) || (cu_sp->m_addr_size == 8);
if (length_OK && version_OK && addr_size_OK && abbr_offset_OK &&
abbr != NULL) {
cu_sp->m_abbrevs = abbr->GetAbbreviationDeclarationSet(abbr_offset);
return cu_sp;
}
// reset the offset to where we tried to parse from if anything went wrong
*offset_ptr = cu_sp->m_offset;
}
return nullptr;
}
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
static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
Timer scoped_timer(
func_cat,
"%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 *log(LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
if (log && log->GetVerbose()) {
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);
log->PutString(strm.GetString());
}
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 want 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);
dw_addr_t ranges_base = cu_die.GetAttributeValueAsUnsigned(
m_dwarf2Data, this, DW_AT_GNU_ranges_base, 0);
dwo_cu->SetAddrBase(addr_base, ranges_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));
if (valid_offset && length_OK && version_OK && addr_size_OK &&
abbr_offset_OK) {
return true;
} else {
s->Printf(" 0x%8.8x: ", m_offset);
DumpDataExtractor(m_dwarf2Data->get_debug_info_data(), 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) {
assert(!m_dwarf2Data->GetBaseCompileUnit() &&
"DWARFCompileUnit associated with .dwo or .dwp "
"should not be indexed directly");
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_array_type:
case DW_TAG_base_type:
case DW_TAG_class_type:
case DW_TAG_constant:
case DW_TAG_enumeration_type:
case DW_TAG_inlined_subroutine:
case DW_TAG_namespace:
case DW_TAG_string_type:
case DW_TAG_structure_type:
case DW_TAG_subprogram:
case DW_TAG_subroutine_type:
case DW_TAG_typedef:
case DW_TAG_union_type:
case DW_TAG_unspecified_type:
case DW_TAG_variable:
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 && 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()));
}
}
}
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 && 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_array_type:
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_structure_type:
case DW_TAG_subroutine_type:
case DW_TAG_typedef:
case DW_TAG_union_type:
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(
llvm::StringRef("^4\\.[012]\\.[01] \\(Based on Apple "
"Inc\\. build [0-9]+\\) \\(LLVM build "
"[\\.0-9]+\\)$"));
if (llvm_gcc_regex.Execute(llvm::StringRef(producer_cstr))) {
m_producer = eProducerLLVMGCC;
} else if (strstr(producer_cstr, "clang")) {
static RegularExpression g_clang_version_regex(
llvm::StringRef("clang-([0-9]+)\\.([0-9]+)\\.([0-9]+)"));
RegularExpression::Match regex_match(3);
if (g_clang_version_regex.Execute(llvm::StringRef(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_addr_t ranges_base,
dw_offset_t base_obj_offset) {
m_addr_base = addr_base;
m_ranges_base = ranges_base;
m_base_obj_offset = base_obj_offset;
}
lldb::ByteOrder DWARFCompileUnit::GetByteOrder() const {
return m_dwarf2Data->GetObjectFile()->GetByteOrder();
}
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