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Revert "Cleanup DWARFCompileUnit and DWARFUnit in preparation for adding DWARFTypeUnit" 

The reverted commit changed DWARFUnit from https://reviews.llvm.org/D40466 and
https://reviews.llvm.org/D42892 that was prepared for DWARFPartialUnit and
made from it a superclass for DWARFTypeUnit.  DWARFUnit's intention was:
	DWARFUnit->DWARFSomeNameUnit->DWARFCompileUnit
	DWARFUnit->DWARFSomeNameUnit->DWARFTypeUnit
	DWARFUnit->DWARFPartialUnit

Discussed at: https://reviews.llvm.org/D45170

This reverts commit r329305.

llvm-svn: 329423
This commit is contained in:
Jan Kratochvil 2018-04-06 17:11:13 +00:00
parent a1b7447dfd
commit 7ea906459a
8 changed files with 828 additions and 569 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

580
lldb/source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.cpp
View File

@ -9,15 +9,36 @@
#include "DWARFCompileUnit.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)
: DWARFUnit(dwarf2Data) {}
: m_dwarf2Data(dwarf2Data) {}
DWARFUnitSP DWARFCompileUnit::Extract(SymbolFileDWARF *dwarf2Data,
lldb::offset_t *offset_ptr) {
@ -60,6 +81,259 @@ DWARFUnitSP DWARFCompileUnit::Extract(SymbolFileDWARF *dwarf2Data,
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();
DWARFUnit *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;
DWARFUnit *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 "
@ -67,3 +341,307 @@ void DWARFCompileUnit::Dump(Stream *s) const {
m_offset, m_length, m_version, GetAbbrevOffset(), m_addr_size,
GetNextCompileUnitOffset());
}
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) {
DWARFUnit *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();
}
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::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;
}
DWARFProducer 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::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::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;
}
}
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;
}

106
lldb/source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.h
View File

@ -18,10 +18,114 @@ class DWARFCompileUnit : public DWARFUnit {
public:
static DWARFUnitSP Extract(SymbolFileDWARF *dwarf2Data,
lldb::offset_t *offset_ptr);
void Dump(lldb_private::Stream *s) const override;
size_t ExtractDIEsIfNeeded(bool cu_die_only);
DWARFDIE LookupAddress(const dw_addr_t address);
size_t AppendDIEsWithTag(const dw_tag_t tag,
DWARFDIECollection &matching_dies,
uint32_t depth = UINT32_MAX) const;
bool Verify(lldb_private::Stream *s) const;
void Dump(lldb_private::Stream *s) const;
lldb::user_id_t GetID() const;
dw_offset_t GetAbbrevOffset() const;
void SetAddrBase(dw_addr_t addr_base, dw_addr_t ranges_base, dw_offset_t base_obj_offset);
void ClearDIEs(bool keep_compile_unit_die);
void BuildAddressRangeTable(SymbolFileDWARF *dwarf2Data,
DWARFDebugAranges *debug_aranges);
lldb_private::TypeSystem *GetTypeSystem();
DWARFDIE
GetCompileUnitDIEOnly() { return DWARFDIE(this, GetCompileUnitDIEPtrOnly()); }
DWARFDIE
DIE() { return DWARFDIE(this, DIEPtr()); }
void AddDIE(DWARFDebugInfoEntry &die) {
// The average bytes per DIE entry has been seen to be
// around 14-20 so lets pre-reserve half of that since
// we are now stripping the NULL tags.
// Only reserve the memory if we are adding children of
// the main compile unit DIE. The compile unit DIE is always
// the first entry, so if our size is 1, then we are adding
// the first compile unit child DIE and should reserve
// the memory.
if (m_die_array.empty())
m_die_array.reserve(GetDebugInfoSize() / 24);
m_die_array.push_back(die);
}
void AddCompileUnitDIE(DWARFDebugInfoEntry &die);
void SetUserData(void *d);
const DWARFDebugAranges &GetFunctionAranges();
DWARFProducer GetProducer();
uint32_t GetProducerVersionMajor();
uint32_t GetProducerVersionMinor();
uint32_t GetProducerVersionUpdate();
lldb::LanguageType GetLanguageType();
bool GetIsOptimized();
protected:
virtual DWARFCompileUnit &Data() override { return *this; }
virtual const DWARFCompileUnit &Data() const override { return *this; }
SymbolFileDWARF *m_dwarf2Data;
std::unique_ptr<SymbolFileDWARFDwo> m_dwo_symbol_file;
const DWARFAbbreviationDeclarationSet *m_abbrevs;
void *m_user_data = nullptr;
DWARFDebugInfoEntry::collection
m_die_array; // The compile unit debug information entry item
std::unique_ptr<DWARFDebugAranges> m_func_aranges_ap; // A table similar to
// the .debug_aranges
// table, but this one
// points to the exact
// DW_TAG_subprogram
// DIEs
dw_addr_t m_base_addr = 0;
dw_offset_t m_length;
uint16_t m_version;
uint8_t m_addr_size;
DWARFProducer m_producer = eProducerInvalid;
uint32_t m_producer_version_major = 0;
uint32_t m_producer_version_minor = 0;
uint32_t m_producer_version_update = 0;
lldb::LanguageType m_language_type = lldb::eLanguageTypeUnknown;
bool m_is_dwarf64;
lldb_private::LazyBool m_is_optimized = lldb_private::eLazyBoolCalculate;
dw_addr_t m_addr_base = 0; // Value of DW_AT_addr_base
dw_addr_t m_ranges_base = 0; // Value of DW_AT_ranges_base
// If this is a dwo compile unit this is the offset of the base compile unit
// in the main object file
dw_offset_t m_base_obj_offset = DW_INVALID_OFFSET;
void ParseProducerInfo();
private:
DWARFCompileUnit(SymbolFileDWARF *dwarf2Data);
const DWARFDebugInfoEntry *GetCompileUnitDIEPtrOnly() {
ExtractDIEsIfNeeded(true);
if (m_die_array.empty())
return NULL;
return &m_die_array[0];
}
const DWARFDebugInfoEntry *DIEPtr() {
ExtractDIEsIfNeeded(false);
if (m_die_array.empty())
return NULL;
return &m_die_array[0];
}
DISALLOW_COPY_AND_ASSIGN(DWARFCompileUnit);
};

4
lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfoEntry.cpp
View File

@ -640,7 +640,7 @@ void DWARFDebugInfoEntry::Dump(SymbolFileDWARF *dwarf2Data,
void DWARFDebugInfoEntry::DumpLocation(SymbolFileDWARF *dwarf2Data,
DWARFUnit *cu, Stream &s) const {
const DWARFDIE cu_die = cu->GetUnitDIEOnly();
const DWARFDIE cu_die = cu->GetCompileUnitDIEOnly();
const char *cu_name = NULL;
if (cu_die)
cu_name = cu_die.GetName();
@ -916,7 +916,7 @@ dw_offset_t DWARFDebugInfoEntry::GetAttributeValue(
if (!dwo_cu)
return 0;
DWARFDIE dwo_cu_die = dwo_cu->GetUnitDIEOnly();
DWARFDIE dwo_cu_die = dwo_cu->GetCompileUnitDIEOnly();
if (!dwo_cu_die.IsValid())
return 0;

624
lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp
View File

@ -11,18 +11,11 @@
#include "Plugins/Language/ObjC/ObjCLanguage.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/Timer.h"
#include "DWARFDIECollection.h"
#include "DWARFDebugAbbrev.h"
#include "DWARFDebugAranges.h"
#include "DWARFCompileUnit.h"
#include "DWARFDebugInfo.h"
#include "LogChannelDWARF.h"
#include "SymbolFileDWARFDebugMap.h"
#include "SymbolFileDWARFDwo.h"
using namespace lldb;
@ -31,241 +24,34 @@ using namespace std;
extern int g_verbose;
DWARFUnit::DWARFUnit(SymbolFileDWARF *dwarf) : m_dwarf(dwarf) {}
DWARFUnit::DWARFUnit() {}
DWARFUnit::~DWARFUnit() {}
//----------------------------------------------------------------------
// ParseCompileUnitDIEsIfNeeded
//
// Parses a compile unit and indexes its DIEs if it hasn't already been
// done.
//----------------------------------------------------------------------
size_t DWARFUnit::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: DWARFUnit::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_dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace(
log,
"DWARFUnit::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_dwarf->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)
AddUnitDIE(die);
uint64_t base_addr = die.GetAttributeValueAsAddress(
m_dwarf, this, DW_AT_low_pc, LLDB_INVALID_ADDRESS);
if (base_addr == LLDB_INVALID_ADDRESS)
base_addr =
die.GetAttributeValueAsAddress(m_dwarf, 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_dwarf->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_dwarf, this, strm, UINT32_MAX);
log->PutString(strm.GetString());
}
if (!m_dwo_symbol_file)
return m_die_array.size();
DWARFUnit *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 DWARFUnit::AddUnitDIE(DWARFDebugInfoEntry &die) {
assert(m_die_array.empty() && "Compile unit DIE already added");
// The average bytes per DIE entry has been seen to be around 14-20 so lets
// pre-reserve half of that since we are now stripping the NULL tags.
// Only reserve the memory if we are adding children of the main compile unit
// DIE. The compile unit DIE is always the first entry, so if our size is 1,
// then we are adding the first compile unit child DIE and should reserve
// the memory.
m_die_array.reserve(GetDebugInfoSize() / 24);
m_die_array.push_back(die);
const DWARFDebugInfoEntry &cu_die = m_die_array.front();
std::unique_ptr<SymbolFileDWARFDwo> dwo_symbol_file =
m_dwarf->GetDwoSymbolFileForCompileUnit(*this, cu_die);
if (!dwo_symbol_file)
return;
DWARFUnit *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->GetUnitDIEOnly();
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_dwarf, 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_dwarf, this, DW_AT_GNU_addr_base, 0);
dw_addr_t ranges_base = cu_die.GetAttributeValueAsUnsigned(
m_dwarf, this, DW_AT_GNU_ranges_base, 0);
dwo_cu->SetAddrBase(addr_base, ranges_base, m_offset);
return Data().ExtractDIEsIfNeeded(cu_die_only);
}
DWARFDIE DWARFUnit::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();
return Data().LookupAddress(address);
}
size_t DWARFUnit::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;
return Data().AppendDIEsWithTag(tag, dies, depth);
}
bool DWARFUnit::Verify(Stream *s) const {
return Data().Verify(s);
}
void DWARFUnit::Dump(Stream *s) const {
Data().Dump(s);
}
lldb::user_id_t DWARFUnit::GetID() const {
dw_offset_t local_id =
m_base_obj_offset != DW_INVALID_OFFSET ? m_base_obj_offset : m_offset;
if (m_dwarf)
return DIERef(local_id, local_id).GetUID(m_dwarf);
else
return local_id;
return Data().GetID();
}
uint32_t DWARFUnit::Size() const { return IsDWARF64() ? 23 : 11; }
@ -278,162 +64,46 @@ size_t DWARFUnit::GetDebugInfoSize() const {
return (IsDWARF64() ? 12 : 4) + GetLength() - Size();
}
uint32_t DWARFUnit::GetLength() const { return m_length; }
uint16_t DWARFUnit::GetVersion() const { return m_version; }
uint32_t DWARFUnit::GetLength() const { return Data().m_length; }
uint16_t DWARFUnit::GetVersion() const { return Data().m_version; }
const DWARFAbbreviationDeclarationSet *DWARFUnit::GetAbbreviations() const {
return m_abbrevs;
return Data().m_abbrevs;
}
dw_offset_t DWARFUnit::GetAbbrevOffset() const {
return m_abbrevs ? m_abbrevs->GetOffset() : DW_INVALID_OFFSET;
return Data().GetAbbrevOffset();
}
uint8_t DWARFUnit::GetAddressByteSize() const { return m_addr_size; }
uint8_t DWARFUnit::GetAddressByteSize() const { return Data().m_addr_size; }
dw_addr_t DWARFUnit::GetBaseAddress() const { return m_base_addr; }
dw_addr_t DWARFUnit::GetBaseAddress() const { return Data().m_base_addr; }
dw_addr_t DWARFUnit::GetAddrBase() const { return m_addr_base; }
dw_addr_t DWARFUnit::GetAddrBase() const { return Data().m_addr_base; }
dw_addr_t DWARFUnit::GetRangesBase() const { return m_ranges_base; }
dw_addr_t DWARFUnit::GetRangesBase() const { return Data().m_ranges_base; }
void DWARFUnit::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;
Data().SetAddrBase(addr_base, ranges_base, base_obj_offset);
}
void DWARFUnit::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);
Data().ClearDIEs(keep_compile_unit_die);
}
void DWARFUnit::BuildAddressRangeTable(SymbolFileDWARF *dwarf,
void DWARFUnit::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 = GetUnitDIEPtrOnly();
const dw_offset_t cu_offset = GetOffset();
if (die) {
DWARFRangeList ranges;
const size_t num_ranges =
die->GetAttributeAddressRanges(dwarf, 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(dwarf, 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 = dwarf->GetCompUnitForDWARFCompUnit(this);
if (sc.comp_unit) {
SymbolFileDWARFDebugMap *debug_map_sym_file =
m_dwarf->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(dwarf, 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 = dwarf->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);
Data().BuildAddressRangeTable(dwarf2Data, debug_aranges);
}
lldb::ByteOrder DWARFUnit::GetByteOrder() const {
return m_dwarf->GetObjectFile()->GetByteOrder();
return Data().m_dwarf2Data->GetObjectFile()->GetByteOrder();
}
TypeSystem *DWARFUnit::GetTypeSystem() {
if (m_dwarf)
return m_dwarf->GetTypeSystemForLanguage(GetLanguageType());
else
return nullptr;
return Data().GetTypeSystem();
}
DWARFFormValue::FixedFormSizes DWARFUnit::GetFixedFormSizes() {
@ -441,9 +111,19 @@ DWARFFormValue::FixedFormSizes DWARFUnit::GetFixedFormSizes() {
IsDWARF64());
}
void DWARFUnit::SetBaseAddress(dw_addr_t base_addr) { m_base_addr = base_addr; }
void DWARFUnit::SetBaseAddress(dw_addr_t base_addr) {
Data().m_base_addr = base_addr;
}
bool DWARFUnit::HasDIEsParsed() const { return m_die_array.size() > 1; }
DWARFDIE DWARFUnit::GetCompileUnitDIEOnly() {
return Data().GetCompileUnitDIEOnly();
}
DWARFDIE DWARFUnit::DIE() {
return Data().DIE();
}
bool DWARFUnit::HasDIEsParsed() const { return Data().m_die_array.size() > 1; }
//----------------------------------------------------------------------
// Compare function DWARFDebugAranges::Range structures
@ -469,9 +149,9 @@ DWARFUnit::GetDIE(dw_offset_t 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);
DWARFDebugInfoEntry::iterator end = Data().m_die_array.end();
DWARFDebugInfoEntry::iterator pos = lower_bound(
Data().m_die_array.begin(), end, die_offset, CompareDIEOffset);
if (pos != end) {
if (die_offset == (*pos).GetOffset())
return DWARFDIE(this, &(*pos));
@ -480,16 +160,18 @@ DWARFUnit::GetDIE(dw_offset_t die_offset) {
// 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_dwarf->DebugInfo()->GetDIEForDIEOffset(die_offset);
return Data().m_dwarf2Data->DebugInfo()->GetDIEForDIEOffset(die_offset);
}
}
return DWARFDIE(); // Not found
}
static uint8_t g_default_addr_size = 4;
uint8_t DWARFUnit::GetAddressByteSize(const DWARFUnit *cu) {
if (cu)
return cu->GetAddressByteSize();
return DWARFUnit::GetDefaultAddressSize();
return DWARFCompileUnit::GetDefaultAddressSize();
}
bool DWARFUnit::IsDWARF64(const DWARFUnit *cu) {
@ -498,14 +180,18 @@ bool DWARFUnit::IsDWARF64(const DWARFUnit *cu) {
return false;
}
uint8_t DWARFUnit::GetDefaultAddressSize() { return 4; }
uint8_t DWARFUnit::GetDefaultAddressSize() {
return g_default_addr_size;
}
void *DWARFUnit::GetUserData() const { return m_user_data; }
void DWARFUnit::SetDefaultAddressSize(uint8_t addr_size) {
g_default_addr_size = addr_size;
}
void *DWARFUnit::GetUserData() const { return Data().m_user_data; }
void DWARFUnit::SetUserData(void *d) {
m_user_data = d;
if (m_dwo_symbol_file)
m_dwo_symbol_file->GetCompileUnit()->SetUserData(d);
Data().SetUserData(d);
}
bool DWARFUnit::Supports_DW_AT_APPLE_objc_complete_type() {
@ -533,74 +219,26 @@ bool DWARFUnit::Supports_unnamed_objc_bitfields() {
// info
}
SymbolFileDWARF *DWARFUnit::GetSymbolFileDWARF() const { return m_dwarf; }
void DWARFUnit::ParseProducerInfo() {
m_producer_version_major = UINT32_MAX;
m_producer_version_minor = UINT32_MAX;
m_producer_version_update = UINT32_MAX;
const DWARFDebugInfoEntry *die = GetUnitDIEPtrOnly();
if (die) {
const char *producer_cstr =
die->GetAttributeValueAsString(m_dwarf, 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;
SymbolFileDWARF *DWARFUnit::GetSymbolFileDWARF() const {
return Data().m_dwarf2Data;
}
DWARFProducer DWARFUnit::GetProducer() {
if (m_producer == eProducerInvalid)
ParseProducerInfo();
return m_producer;
return Data().GetProducer();
}
uint32_t DWARFUnit::GetProducerVersionMajor() {
if (m_producer_version_major == 0)
ParseProducerInfo();
return m_producer_version_major;
return Data().GetProducerVersionMajor();
}
uint32_t DWARFUnit::GetProducerVersionMinor() {
if (m_producer_version_minor == 0)
ParseProducerInfo();
return m_producer_version_minor;
return Data().GetProducerVersionMinor();
}
uint32_t DWARFUnit::GetProducerVersionUpdate() {
if (m_producer_version_update == 0)
ParseProducerInfo();
return m_producer_version_update;
return Data().GetProducerVersionUpdate();
}
LanguageType DWARFUnit::LanguageTypeFromDWARF(uint64_t val) {
// Note: user languages between lo_user and hi_user
// must be handled explicitly here.
@ -615,51 +253,47 @@ LanguageType DWARFUnit::LanguageTypeFromDWARF(uint64_t val) {
}
LanguageType DWARFUnit::GetLanguageType() {
if (m_language_type != eLanguageTypeUnknown)
return m_language_type;
const DWARFDebugInfoEntry *die = GetUnitDIEPtrOnly();
if (die)
m_language_type = LanguageTypeFromDWARF(
die->GetAttributeValueAsUnsigned(m_dwarf, this, DW_AT_language, 0));
return m_language_type;
return Data().GetLanguageType();
}
bool DWARFUnit::IsDWARF64() const { return m_is_dwarf64; }
bool DWARFUnit::IsDWARF64() const { return Data().m_is_dwarf64; }
bool DWARFUnit::GetIsOptimized() {
if (m_is_optimized == eLazyBoolCalculate) {
const DWARFDebugInfoEntry *die = GetUnitDIEPtrOnly();
if (die) {
m_is_optimized = eLazyBoolNo;
if (die->GetAttributeValueAsUnsigned(m_dwarf, this, DW_AT_APPLE_optimized,
0) == 1) {
m_is_optimized = eLazyBoolYes;
}
}
}
return m_is_optimized == eLazyBoolYes;
return Data().GetIsOptimized();
}
SymbolFileDWARFDwo *DWARFUnit::GetDwoSymbolFile() const {
return m_dwo_symbol_file.get();
return Data().m_dwo_symbol_file.get();
}
dw_offset_t DWARFUnit::GetBaseObjOffset() const { return m_base_obj_offset; }
dw_offset_t DWARFUnit::GetBaseObjOffset() const {
return Data().m_base_obj_offset;
}
void DWARFUnit::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_dwarf->GetBaseCompileUnit() &&
const DWARFDebugInfoEntry *DWARFUnit::GetCompileUnitDIEPtrOnly() {
return Data().GetCompileUnitDIEPtrOnly();
}
const DWARFDebugInfoEntry *DWARFUnit::DIEPtr() {
return Data().DIEPtr();
}
void DWARFUnit::Index(NameToDIE &func_basenames,
NameToDIE &func_fullnames, NameToDIE &func_methods,
NameToDIE &func_selectors,
NameToDIE &objc_class_selectors,
NameToDIE &globals, NameToDIE &types,
NameToDIE &namespaces) {
assert(!Data().m_dwarf2Data->GetBaseCompileUnit() &&
"DWARFUnit associated with .dwo or .dwp "
"should not be indexed directly");
Log *log(LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
if (log) {
m_dwarf->GetObjectFile()->GetModule()->LogMessage(
log, "DWARFUnit::Index() for compile unit at .debug_info[0x%8.8x]",
Data().m_dwarf2Data->GetObjectFile()->GetModule()->LogMessage(
log,
"DWARFUnit::Index() for compile unit at .debug_info[0x%8.8x]",
GetOffset());
}
@ -689,8 +323,9 @@ void DWARFUnit::IndexPrivate(
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();
DWARFDebugInfoEntry::const_iterator begin =
dwarf_cu->Data().m_die_array.begin();
DWARFDebugInfoEntry::const_iterator end = dwarf_cu->Data().m_die_array.end();
for (pos = begin; pos != end; ++pos) {
const DWARFDebugInfoEntry &die = *pos;
@ -778,25 +413,37 @@ void DWARFUnit::IndexPrivate(
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 don't want
// the performance penalty of that right now.
// 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(dwarf, i,
// form_value)) {
// // If we have valid block data, then we have location
// // expression bytesthat 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;
// }
// }
// }
// 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;
@ -981,34 +628,3 @@ void DWARFUnit::IndexPrivate(
}
}
}
const DWARFDebugAranges &DWARFUnit::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_dwarf->GetObjectFile()->GetModule()->LogMessage(
log,
"DWARFUnit::GetFunctionAranges() for compile unit at "
".debug_info[0x%8.8x]",
GetOffset());
}
const DWARFDebugInfoEntry *die = DIEPtr();
if (die)
die->BuildFunctionAddressRangeTable(m_dwarf, this,
m_func_aranges_ap.get());
if (m_dwo_symbol_file) {
DWARFUnit *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();
}

67
lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.h
View File

@ -42,7 +42,7 @@ public:
DWARFDIECollection &matching_dies,
uint32_t depth = UINT32_MAX) const;
bool Verify(lldb_private::Stream *s) const;
virtual void Dump(lldb_private::Stream *s) const = 0;
void Dump(lldb_private::Stream *s) const;
// Offset of the initial length field.
dw_offset_t GetOffset() const { return m_offset; }
lldb::user_id_t GetID() const;
@ -65,25 +65,24 @@ public:
dw_addr_t GetBaseAddress() const;
dw_addr_t GetAddrBase() const;
dw_addr_t GetRangesBase() const;
void SetAddrBase(dw_addr_t addr_base, dw_addr_t ranges_base,
dw_offset_t base_obj_offset);
void SetAddrBase(dw_addr_t addr_base, dw_addr_t ranges_base, dw_offset_t base_obj_offset);
void ClearDIEs(bool keep_compile_unit_die);
void BuildAddressRangeTable(SymbolFileDWARF *dwarf,
void BuildAddressRangeTable(SymbolFileDWARF *dwarf2Data,
DWARFDebugAranges *debug_aranges);
lldb::ByteOrder GetByteOrder() const;
lldb_private::TypeSystem *GetTypeSystem();
const DWARFDebugAranges &GetFunctionAranges();
DWARFFormValue::FixedFormSizes GetFixedFormSizes();
void SetBaseAddress(dw_addr_t base_addr);
DWARFDIE GetUnitDIEOnly() { return DWARFDIE(this, GetUnitDIEPtrOnly()); }
DWARFDIE
GetCompileUnitDIEOnly();
DWARFDIE DIE() { return DWARFDIE(this, DIEPtr()); }
DWARFDIE
DIE();
bool HasDIEsParsed() const;
@ -95,6 +94,8 @@ public:
static uint8_t GetDefaultAddressSize();
static void SetDefaultAddressSize(uint8_t addr_size);
void *GetUserData() const;
void SetUserData(void *d);
@ -133,33 +134,10 @@ public:
dw_offset_t GetBaseObjOffset() const;
protected:
DWARFUnit(SymbolFileDWARF *dwarf);
virtual DWARFCompileUnit &Data() = 0;
virtual const DWARFCompileUnit &Data() const = 0;
SymbolFileDWARF *m_dwarf = nullptr;
std::unique_ptr<SymbolFileDWARFDwo> m_dwo_symbol_file;
const DWARFAbbreviationDeclarationSet *m_abbrevs = nullptr;
void *m_user_data = nullptr;
// The compile unit debug information entry item
DWARFDebugInfoEntry::collection m_die_array;
// A table similar to the .debug_aranges table, but this one points to the
// exact DW_TAG_subprogram DIEs
std::unique_ptr<DWARFDebugAranges> m_func_aranges_ap;
dw_addr_t m_base_addr = 0;
dw_offset_t m_length = 0;
uint16_t m_version = 0;
uint8_t m_addr_size = 0;
DWARFProducer m_producer = eProducerInvalid;
uint32_t m_producer_version_major = 0;
uint32_t m_producer_version_minor = 0;
uint32_t m_producer_version_update = 0;
lldb::LanguageType m_language_type = lldb::eLanguageTypeUnknown;
bool m_is_dwarf64 = false;
lldb_private::LazyBool m_is_optimized = lldb_private::eLazyBoolCalculate;
dw_addr_t m_addr_base = 0; // Value of DW_AT_addr_base
dw_addr_t m_ranges_base = 0; // Value of DW_AT_ranges_base
// If this is a dwo compile unit this is the offset of the base compile unit
// in the main object file
dw_offset_t m_base_obj_offset = DW_INVALID_OFFSET;
DWARFUnit();
static void
IndexPrivate(DWARFUnit *dwarf_cu, const lldb::LanguageType cu_language,
@ -173,26 +151,9 @@ protected:
dw_offset_t m_offset;
private:
void ParseProducerInfo();
const DWARFDebugInfoEntry *GetCompileUnitDIEPtrOnly();
// Get the DWARF unit DWARF debug informration entry. Parse the single DIE
// if needed.
const DWARFDebugInfoEntry *GetUnitDIEPtrOnly() {
ExtractDIEsIfNeeded(true);
if (m_die_array.empty())
return NULL;
return &m_die_array[0];
}
// Get all DWARF debug informration entries. Parse all DIEs if needed.
const DWARFDebugInfoEntry *DIEPtr() {
ExtractDIEsIfNeeded(false);
if (m_die_array.empty())
return NULL;
return &m_die_array[0];
}
void AddUnitDIE(DWARFDebugInfoEntry &die);
const DWARFDebugInfoEntry *DIEPtr();
DISALLOW_COPY_AND_ASSIGN(DWARFUnit);
};

12
lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
View File

@ -772,7 +772,7 @@ lldb::CompUnitSP SymbolFileDWARF::ParseCompileUnit(DWARFUnit *dwarf_cu,
} else {
ModuleSP module_sp(m_obj_file->GetModule());
if (module_sp) {
const DWARFDIE cu_die = dwarf_cu->GetUnitDIEOnly();
const DWARFDIE cu_die = dwarf_cu->GetCompileUnitDIEOnly();
if (cu_die) {
FileSpec cu_file_spec{cu_die.GetName(), false};
if (cu_file_spec) {
@ -909,7 +909,7 @@ bool SymbolFileDWARF::ParseCompileUnitSupportFiles(
assert(sc.comp_unit);
DWARFUnit *dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
if (dwarf_cu) {
const DWARFDIE cu_die = dwarf_cu->GetUnitDIEOnly();
const DWARFDIE cu_die = dwarf_cu->GetCompileUnitDIEOnly();
if (cu_die) {
const char *cu_comp_dir = resolveCompDir(
@ -948,7 +948,7 @@ bool SymbolFileDWARF::ParseImportedModules(
UpdateExternalModuleListIfNeeded();
if (sc.comp_unit) {
const DWARFDIE die = dwarf_cu->GetUnitDIEOnly();
const DWARFDIE die = dwarf_cu->GetCompileUnitDIEOnly();
if (die) {
for (DWARFDIE child_die = die.GetFirstChild(); child_die;
@ -1024,7 +1024,7 @@ bool SymbolFileDWARF::ParseCompileUnitLineTable(const SymbolContext &sc) {
DWARFUnit *dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
if (dwarf_cu) {
const DWARFDIE dwarf_cu_die = dwarf_cu->GetUnitDIEOnly();
const DWARFDIE dwarf_cu_die = dwarf_cu->GetCompileUnitDIEOnly();
if (dwarf_cu_die) {
const dw_offset_t cu_line_offset =
dwarf_cu_die.GetAttributeValueAsUnsigned(DW_AT_stmt_list,
@ -1109,7 +1109,7 @@ bool SymbolFileDWARF::ParseCompileUnitDebugMacros(const SymbolContext &sc) {
if (dwarf_cu == nullptr)
return false;
const DWARFDIE dwarf_cu_die = dwarf_cu->GetUnitDIEOnly();
const DWARFDIE dwarf_cu_die = dwarf_cu->GetCompileUnitDIEOnly();
if (!dwarf_cu_die)
return false;
@ -1620,7 +1620,7 @@ void SymbolFileDWARF::UpdateExternalModuleListIfNeeded() {
for (uint32_t cu_idx = 0; cu_idx < num_compile_units; ++cu_idx) {
DWARFUnit *dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
const DWARFDIE die = dwarf_cu->GetUnitDIEOnly();
const DWARFDIE die = dwarf_cu->GetCompileUnitDIEOnly();
if (die && die.HasChildren() == false) {
const char *name = die.GetAttributeValueAsString(DW_AT_name, nullptr);

2
lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
View File

@ -71,7 +71,7 @@ public:
friend class SymbolFileDWARFDwo;
friend class DebugMapModule;
friend struct DIERef;
friend class DWARFUnit;
friend class DWARFCompileUnit;
friend class DWARFDIE;
friend class DWARFASTParserClang;
friend class DWARFASTParserGo;

2
lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDebugMap.h
View File

@ -136,7 +136,7 @@ protected:
friend class DebugMapModule;
friend struct DIERef;
friend class DWARFASTParserClang;
friend class DWARFUnit;
friend class DWARFCompileUnit;
friend class SymbolFileDWARF;
struct OSOInfo {
lldb::ModuleSP module_sp;