jankratochvil created this revision.
Herald added a subscriber: JDevlieghere.
It does not make sense to extract whole DW_TAG_partial_unit only to find out it
is a partial unit and so it cannot be indexed on its own.
All DWZ patches are also applied in: git clone -b dwz
git://git.jankratochvil.net/lldb
https://reviews.llvm.org/D40471
Files:
source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.cpp
source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.h
source/Plugins/SymbolFile/DWARF/DWARFDebugPubnames.cpp
source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
Index: source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
===================================================================
--- source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
+++ source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
@@ -2045,9 +2045,10 @@
auto extract_fn = [debug_info, &clear_cu_dies](size_t cu_idx) {
DWARFCompileUnit *dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
if (dwarf_cu) {
- // dwarf_cu->ExtractDIEsIfNeeded(false) will return zero if the
+ // dwarf_cu->ExtractDIEsIfNeeded will return zero if the
// DIEs for a compile unit have already been parsed.
- if (dwarf_cu->ExtractDIEsIfNeeded(false) > 1)
+ if (dwarf_cu->ExtractDIEsIfNeeded(DWARFCompileUnit::
+ ExtractDIEsIfNeededKind::AllDiesButCuDieOnlyForPartialUnits) > 1)
clear_cu_dies[cu_idx] = true;
}
};
Index: source/Plugins/SymbolFile/DWARF/DWARFDebugPubnames.cpp
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFDebugPubnames.cpp
+++ source/Plugins/SymbolFile/DWARF/DWARFDebugPubnames.cpp
@@ -76,7 +76,10 @@
DWARFFormValue::GetFixedFormSizesForAddressSize(
cu->GetAddressByteSize(), cu->IsDWARF64());
- bool clear_dies = cu->ExtractDIEsIfNeeded(false) > 1;
+ bool clear_dies = cu->ExtractDIEsIfNeeded(
+ DWARFCompileUnit::ExtractDIEsIfNeededKind::AllDies) > 1;
+ // In DW_TAG_partial_unit by DWZ cannot be DW_TAG_subprogram definition
+ // (see DWZ checksum_die). But there can be DW_TAG_variable.
DWARFDIECollection dies;
const size_t die_count = cu->AppendDIEsWithTag(DW_TAG_subprogram, dies) +
Index: source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.h
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.h
+++ source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.h
@@ -85,7 +85,13 @@
lldb::offset_t *offset_ptr);
~DWARFCompileUnit();
- size_t ExtractDIEsIfNeeded(bool cu_die_only);
+ enum class ExtractDIEsIfNeededKind {
+ CuDieOnly,
+ AllDies,
+ AllDiesButCuDieOnlyForPartialUnits,
+ };
+ size_t ExtractDIEsIfNeeded(ExtractDIEsIfNeededKind kind);
+
DWARFDIE LookupAddress(const dw_addr_t address);
size_t AppendDIEsWithTag(const dw_tag_t tag,
DWARFDIECollection &matching_dies,
@@ -247,14 +253,14 @@
DWARFCompileUnit(SymbolFileDWARF *dwarf2Data);
const DWARFDebugInfoEntry *GetCompileUnitDIEPtrOnly() {
- ExtractDIEsIfNeeded(true);
+ ExtractDIEsIfNeeded(ExtractDIEsIfNeededKind::CuDieOnly);
if (m_data->m_die_array.empty())
return NULL;
return &m_data->m_die_array[0];
}
const DWARFDebugInfoEntry *DIEPtr() {
- ExtractDIEsIfNeeded(false);
+ ExtractDIEsIfNeeded(ExtractDIEsIfNeededKind::AllDies);
if (m_data->m_die_array.empty())
return NULL;
return &m_data->m_die_array[0];
Index: source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.cpp
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.cpp
+++ source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.cpp
@@ -119,11 +119,27 @@
// Parses a compile unit and indexes its DIEs if it hasn't already been
// done.
//----------------------------------------------------------------------
-size_t DWARFCompileUnit::ExtractDIEsIfNeeded(bool cu_die_only) {
+size_t DWARFCompileUnit::ExtractDIEsIfNeeded(ExtractDIEsIfNeededKind kind) {
size_t initial_die_array_size;
- auto already_parsed = [cu_die_only, &initial_die_array_size]() -> bool {
- return (cu_die_only && initial_die_array_size > 0)
- || initial_die_array_size > 1;
+ auto already_parsed =
+ [kind, &initial_die_array_size, this]() -> bool {
+ initial_die_array_size = m_data->m_die_array.size();
+ if (initial_die_array_size > 1)
+ return true;
+ switch (kind) {
+ case ExtractDIEsIfNeededKind::CuDieOnly:
+ if (initial_die_array_size > 0)
+ return true;
+ break;
+ case ExtractDIEsIfNeededKind::AllDies:
+ break;
+ case ExtractDIEsIfNeededKind::AllDiesButCuDieOnlyForPartialUnits: {
+ if (initial_die_array_size > 0
+ && GetCompileUnitDIEOnly().TagOrig() == DW_TAG_partial_unit)
+ return true;
+ } break;
+ }
+ return false;
};
if (already_parsed() && m_data->m_die_array_finished)
return 0;
@@ -139,17 +155,17 @@
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);
+ "%8.8x: DWARFCompileUnit::ExtractDIEsIfNeeded( kind = %i )",
+ m_offset, int(kind));
// Set the offset to that of the first DIE and calculate the start of the
// next compilation unit header.
lldb::offset_t file_offset = ThisCUUniqToFileOffset(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) {
+ if (kind != ExtractDIEsIfNeededKind::CuDieOnly) {
Log *log(
LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | DWARF_LOG_LOOKUPS));
if (log) {
@@ -193,7 +209,10 @@
base_addr = die.GetAttributeValueAsAddress(m_data->m_dwarf2Data, this,
DW_AT_entry_pc, 0);
SetBaseAddress(base_addr);
- if (cu_die_only)
+ if (kind == ExtractDIEsIfNeededKind::CuDieOnly)
+ return 1;
+ if (kind == ExtractDIEsIfNeededKind::AllDiesButCuDieOnlyForPartialUnits
+ && die.TagOrig() == DW_TAG_partial_unit)
return 1;
} else {
if (null_die) {
@@ -277,7 +296,7 @@
return m_data->m_die_array.size();
DWARFCompileUnit *dwo_cu = m_data->m_dwo_symbol_file->GetCompileUnit();
- size_t dwo_die_count = dwo_cu->ExtractDIEsIfNeeded(cu_die_only);
+ size_t dwo_die_count = dwo_cu->ExtractDIEsIfNeeded(kind);
return m_data->m_die_array.size() + dwo_die_count -
1; // We have 2 CU die, but we want to count it only as one
}
@@ -437,9 +456,10 @@
// 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;
+ const bool clear_dies = ExtractDIEsIfNeeded(
+ ExtractDIEsIfNeededKind::AllDiesButCuDieOnlyForPartialUnits) > 1;
- die = DIEPtr();
+ die = GetCompileUnitDIEPtrOnly();
if (die)
die->BuildAddressRangeTable(dwarf2Data, this, debug_aranges);
@@ -566,7 +586,7 @@
return m_data->m_dwo_symbol_file->GetCompileUnit()->GetDIE(die_offset);
if (ContainsDIEOffset(die_offset)) {
- ExtractDIEsIfNeeded(false);
+ ExtractDIEsIfNeeded(ExtractDIEsIfNeededKind::AllDies);
dw_offset_t die_file_offset = ThisCUUniqToFileOffset(die_offset);
DWARFDebugInfoEntry::iterator end = m_data->m_die_array.end();
DWARFDebugInfoEntry::iterator pos = lower_bound(
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