jankratochvil created this revision.
jankratochvil added reviewers: clayborg, labath, JDevlieghere.
jankratochvil added a project: LLDB.
Herald added subscribers: jdoerfert, arphaman.
jankratochvil added a parent revision: D61503: 04/06: Track .debug_types vs.
.debug_info difference.
There is one: `FIXME: May DW_ATOM_cu_offset somehow contain a TypeUnit?`
The whole patchset available for testing as: `git clone -b debugtypes
git://git.jankratochvil.net/lldb`
Repository:
rLLDB LLDB
https://reviews.llvm.org/D61504
Files:
lldb/source/Plugins/SymbolFile/DWARF/DIERef.cpp
lldb/source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.h
lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.cpp
lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.h
lldb/source/Plugins/SymbolFile/DWARF/DWARFFormValue.cpp
lldb/source/Plugins/SymbolFile/DWARF/DebugNamesDWARFIndex.cpp
lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp
Index: lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp
===================================================================
--- lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp
+++ lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp
@@ -159,5 +159,10 @@
DWARFDIE
SymbolFileDWARFDwo::GetDIE(const DIERef &die_ref) {
lldbassert(m_base_dwarf_cu->GetOffset() == die_ref.cu_offset);
- return DebugInfo()->GetDIEForDIEOffset(die_ref.die_offset);
+ lldbassert(DebugInfo()->GetNumUnits() == 1);
+ DWARFUnit *cu = DebugInfo()->GetUnitContainingDIEOffset(
+ die_ref.die_offset, die_ref.IsTypesSection());
+ if (cu)
+ return cu->GetDIE(die_ref.die_offset);
+ return DWARFDIE();
}
Index: lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
===================================================================
--- lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
+++ lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
@@ -695,8 +695,8 @@
auto offset = comp_unit->GetID();
bool is_types_section = (offset & DIERef::UID_IS_TYPES_SECTION) != 0;
offset &= ~DIERef::UID_IS_TYPES_SECTION;
- DWARFUnit *dwarf_cu =
- info->GetUnit((dw_offset_t)comp_unit->GetID());
+ DWARFUnit *dwarf_cu = is_types_section
+ ? info->GetTypesSectionUnit(offset) : info->GetCompileUnit(offset);
if (dwarf_cu && dwarf_cu->GetUserData() == NULL)
dwarf_cu->SetUserData(comp_unit);
return dwarf_cu;
@@ -779,16 +779,22 @@
cu_sp->GetSupportFiles().Replace(0, cu_file_spec);
}
}
+ }
- dwarf_cu->SetUserData(cu_sp.get());
-
- // Figure out the compile unit index if we weren't given one
- if (cu_idx == UINT32_MAX)
- DebugInfo()->GetUnit(dwarf_cu->GetOffset(), &cu_idx);
+ dwarf_cu->SetUserData(cu_sp.get());
- m_obj_file->GetModule()->GetSymbolVendor()->SetCompileUnitAtIndex(
- cu_idx, cu_sp);
+ // Figure out the compile unit index if we weren't given one
+ if (cu_idx == UINT32_MAX) {
+ if (dwarf_cu->IsTypesSection()) {
+ DebugInfo()->GetTypesSectionUnit(dwarf_cu->GetOffset(),
+ &cu_idx);
+ cu_idx += DebugInfo()->GetNumOnlyCompileUnits();
+ } else
+ DebugInfo()->GetCompileUnit(dwarf_cu->GetOffset(), &cu_idx);
}
+
+ m_obj_file->GetModule()->GetSymbolVendor()->SetCompileUnitAtIndex(
+ cu_idx, cu_sp);
}
}
}
@@ -1766,8 +1772,7 @@
}
} else {
uint32_t cu_idx = DW_INVALID_INDEX;
- DWARFUnit *dwarf_cu =
- debug_info->GetUnit(cu_offset, &cu_idx);
+ DWARFUnit *dwarf_cu = debug_info->GetCompileUnit(cu_offset, &cu_idx);
if (dwarf_cu) {
sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
if (sc.comp_unit) {
@@ -3124,7 +3129,7 @@
return num_variables;
}
} else if (sc.comp_unit) {
- DWARFUnit *dwarf_cu = info->GetUnit(sc.comp_unit->GetID());
+ DWARFUnit *dwarf_cu = info->GetCompileUnit(sc.comp_unit->GetID());
if (dwarf_cu == NULL)
return 0;
Index: lldb/source/Plugins/SymbolFile/DWARF/DebugNamesDWARFIndex.cpp
===================================================================
--- lldb/source/Plugins/SymbolFile/DWARF/DebugNamesDWARFIndex.cpp
+++ lldb/source/Plugins/SymbolFile/DWARF/DebugNamesDWARFIndex.cpp
@@ -55,7 +55,8 @@
if (!cu_offset)
return DIERef();
- DWARFUnit *cu = m_debug_info.GetUnit(*cu_offset);
+ // FIXME: May DW_ATOM_cu_offset somehow contain a TypeUnit?
+ DWARFUnit *cu = m_debug_info.GetCompileUnit(*cu_offset);
if (!cu)
return DIERef();
@@ -164,7 +165,7 @@
if (!ref)
continue;
- DWARFUnit *cu = m_debug_info.GetUnit(ref.cu_offset);
+ DWARFUnit *cu = m_debug_info.GetUnit(ref);
if (!cu || !cu->Supports_DW_AT_APPLE_objc_complete_type()) {
incomplete_types.push_back(ref);
continue;
Index: lldb/source/Plugins/SymbolFile/DWARF/DWARFFormValue.cpp
===================================================================
--- lldb/source/Plugins/SymbolFile/DWARF/DWARFFormValue.cpp
+++ lldb/source/Plugins/SymbolFile/DWARF/DWARFFormValue.cpp
@@ -575,8 +575,10 @@
return CUDIERef(m_cu, value);
case DW_FORM_ref_addr: {
+ // GetTypeUnitContainingDIEOffset is never possible as DWARFTypeUnit cannot
+ // reference anything outside.
DWARFUnit *ref_cu = m_cu->GetSymbolFileDWARF()->DebugInfo()
- ->GetUnitContainingDIEOffset(value);
+ ->GetCompileUnitContainingDIEOffset(value);
if (!ref_cu) {
m_cu->GetSymbolFileDWARF()->GetObjectFile()->GetModule()->ReportError(
"DW_FORM_ref_addr DIE reference 0x%" PRIx64 " has no matching CU",
Index: lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.h
===================================================================
--- lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.h
+++ lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.h
@@ -19,6 +19,8 @@
#include "lldb/lldb-private.h"
#include "llvm/Support/Error.h"
+class DWARFTypeUnit;
+
namespace lldb_private {
class DWARFContext;
}
@@ -40,11 +42,31 @@
void SetDwarfData(SymbolFileDWARF *dwarf2Data);
size_t GetNumUnits();
+ // GetNumUnits was called GetNumCompileUnits before, do not clash the rename:
+ size_t GetNumOnlyCompileUnits();
DWARFUnit *GetUnitAtIndex(uint32_t idx);
- DWARFUnit *GetUnit(dw_offset_t cu_offset, uint32_t *idx_ptr = NULL);
- DWARFUnit *GetUnitContainingDIEOffset(dw_offset_t die_offset);
+ DWARFTypeUnit *GetTypeUnitForSignature(uint64_t type_sig);
+ DWARFUnit *GetCompileUnit(dw_offset_t cu_offset,
+ uint32_t *idx_ptr = nullptr) {
+ return GetUnitImpl(m_compile_units, cu_offset, idx_ptr);
+ }
+ DWARFUnit *GetTypesSectionUnit(dw_offset_t cu_offset,
+ uint32_t *idx_ptr = nullptr) {
+ return GetUnitImpl(m_type_units, cu_offset, idx_ptr);
+ }
+ DWARFUnit *GetUnitContainingDIEOffset(dw_offset_t die_offset,
+ bool is_types_section) {
+ return is_types_section
+ ? GetTypeUnitContainingDIEOffset(die_offset)
+ : GetCompileUnitContainingDIEOffset(die_offset);
+ }
+ DWARFUnit *GetCompileUnitContainingDIEOffset(dw_offset_t die_offset) {
+ return GetUnitContainingDIEOffsetImpl(m_compile_units, die_offset);
+ }
+ DWARFUnit *GetTypeUnitContainingDIEOffset(dw_offset_t die_offset) {
+ return GetUnitContainingDIEOffsetImpl(m_type_units, die_offset);
+ }
DWARFUnit *GetUnit(const DIERef &die_ref);
- DWARFDIE GetDIEForDIEOffset(dw_offset_t die_offset);
DWARFDIE GetDIE(const DIERef &die_ref);
enum {
@@ -65,7 +87,7 @@
// Member variables
SymbolFileDWARF *m_dwarf2Data;
lldb_private::DWARFContext &m_context;
- UnitColl m_units;
+ UnitColl m_compile_units, m_type_units;
std::unique_ptr<DWARFDebugAranges>
m_cu_aranges_up; // A quick address to compile unit table
@@ -75,30 +97,34 @@
void ParseUnitHeadersIfNeeded();
template<class Contains>
- DWARFUnit *GetUnitTmpl(
- Contains contains, dw_offset_t offset, uint32_t *idx_ptr = NULL);
+ DWARFUnit *GetUnitTmpl(Contains contains, const UnitColl &units,
+ dw_offset_t offset, uint32_t *idx_ptr = nullptr);
+ DWARFUnit *GetUnitImpl(const UnitColl &units, dw_offset_t cu_offset,
+ uint32_t *idx_ptr);
+ DWARFUnit *GetUnitContainingDIEOffsetImpl(const UnitColl &units,
+ dw_offset_t die_offset);
DISALLOW_COPY_AND_ASSIGN(DWARFDebugInfo);
};
template<class Contains>
-DWARFUnit *DWARFDebugInfo::GetUnitTmpl(
- Contains contains, dw_offset_t offset, uint32_t *idx_ptr) {
+DWARFUnit *DWARFDebugInfo::GetUnitTmpl(Contains contains, const UnitColl &units,
+ dw_offset_t offset, uint32_t *idx_ptr) {
ParseUnitHeadersIfNeeded();
DWARFUnitSP cu_sp;
// Watch out for single unit executable as they are pretty common
- const size_t num_cus = m_units.size();
+ const size_t num_cus = units.size();
if (num_cus == 1) {
- if (contains(*m_units[0], offset)) {
+ if (contains(*units[0], offset)) {
if (idx_ptr)
*idx_ptr = 0;
- return m_units[0].get();
+ return units[0].get();
}
} else if (num_cus) {
- UnitColl::const_iterator end_pos = m_units.end();
- UnitColl::const_iterator begin_pos = m_units.begin();
+ UnitColl::const_iterator end_pos = units.end();
+ UnitColl::const_iterator begin_pos = units.begin();
UnitColl::const_iterator pos = std::upper_bound(
begin_pos, end_pos, offset, OffsetLessThanUnitOffset);
if (pos != begin_pos) {
Index: lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.cpp
===================================================================
--- lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.cpp
+++ lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.cpp
@@ -29,12 +29,14 @@
// Constructor
DWARFDebugInfo::DWARFDebugInfo(lldb_private::DWARFContext &context)
- : m_dwarf2Data(NULL), m_context(context), m_units(), m_cu_aranges_up() {}
+ : m_dwarf2Data(NULL), m_context(context), m_compile_units(), m_type_units(),
+ m_cu_aranges_up() {}
// SetDwarfData
void DWARFDebugInfo::SetDwarfData(SymbolFileDWARF *dwarf2Data) {
m_dwarf2Data = dwarf2Data;
- m_units.clear();
+ m_compile_units.clear();
+ m_type_units.clear();
}
llvm::Expected<DWARFDebugAranges &> DWARFDebugInfo::GetCompileUnitAranges() {
@@ -77,43 +79,53 @@
}
void DWARFDebugInfo::ParseUnitHeadersIfNeeded() {
- if (!m_units.empty())
+ if (!m_compile_units.empty() || !m_type_units.empty())
return;
if (!m_dwarf2Data)
return;
- lldb::offset_t offset = 0;
- const auto &debug_info_data = m_dwarf2Data->get_debug_info_data();
+ {
+ lldb::offset_t offset = 0;
+ const auto &debug_info_data = m_dwarf2Data->get_debug_info_data();
+ while (debug_info_data.ValidOffset(offset)) {
+ llvm::Expected<DWARFUnitSP> cu_sp =
+ DWARFCompileUnit::extract(m_dwarf2Data, debug_info_data, &offset);
- while (debug_info_data.ValidOffset(offset)) {
- llvm::Expected<DWARFUnitSP> cu_sp =
- DWARFCompileUnit::extract(m_dwarf2Data, debug_info_data, &offset);
+ if (!cu_sp) {
+ // FIXME: Propagate this error up.
+ llvm::consumeError(cu_sp.takeError());
+ return;
+ }
- if (!cu_sp) {
- // FIXME: Propagate this error up.
- llvm::consumeError(cu_sp.takeError());
- return;
- }
-
- // If it didn't return an error, then it should be returning a valid Unit.
- assert(*cu_sp);
+ // If it didn't return an error, then it should be returning a valid
+ // DWARFCompileUnit.
+ assert(*cu_sp);
- m_units.push_back(*cu_sp);
+ m_compile_units.push_back(*cu_sp);
- offset = (*cu_sp)->GetNextUnitOffset();
+ offset = (*cu_sp)->GetNextUnitOffset();
+ }
}
}
size_t DWARFDebugInfo::GetNumUnits() {
ParseUnitHeadersIfNeeded();
- return m_units.size();
+ return m_compile_units.size() + m_type_units.size();
+}
+
+size_t DWARFDebugInfo::GetNumOnlyCompileUnits() {
+ ParseUnitHeadersIfNeeded();
+ return m_compile_units.size();
}
DWARFUnit *DWARFDebugInfo::GetUnitAtIndex(uint32_t idx) {
- DWARFUnit *cu = NULL;
- if (idx < GetNumUnits())
- cu = m_units[idx].get();
- return cu;
+ ParseUnitHeadersIfNeeded();
+ if (idx < m_compile_units.size())
+ return m_compile_units[idx].get();
+ else if (idx < m_compile_units.size() + m_type_units.size())
+ return m_type_units[idx - m_compile_units.size()].get();
+ else
+ return NULL;
}
bool DWARFDebugInfo::OffsetLessThanUnitOffset(
@@ -121,34 +133,32 @@
return offset < cu_sp->GetOffset();
}
-DWARFUnit *DWARFDebugInfo::GetUnit(dw_offset_t cu_offset, uint32_t *idx_ptr) {
+DWARFUnit *DWARFDebugInfo::GetUnitImpl(const UnitColl &units,
+ dw_offset_t cu_offset, uint32_t *idx_ptr) {
return GetUnitTmpl(
[](const DWARFUnit &unit, dw_offset_t cu_offset) {
return unit.GetOffset() == cu_offset;
- }, cu_offset, idx_ptr);
+ }, units, cu_offset, idx_ptr);
}
DWARFUnit *DWARFDebugInfo::GetUnit(const DIERef &die_ref) {
- if (die_ref.cu_offset == DW_INVALID_OFFSET)
- return GetUnitContainingDIEOffset(die_ref.die_offset);
- else
- return GetUnit(die_ref.cu_offset);
+ if (die_ref.cu_offset == DW_INVALID_OFFSET) {
+ return GetUnitContainingDIEOffset(die_ref.die_offset, die_ref.IsTypesSection());
+ } else {
+ if (die_ref.IsTypesSection())
+ return GetTypesSectionUnit(die_ref.cu_offset);
+ else
+ return GetCompileUnit(die_ref.cu_offset);
+ }
}
DWARFUnit *
-DWARFDebugInfo::GetUnitContainingDIEOffset(dw_offset_t die_offset) {
+DWARFDebugInfo::GetUnitContainingDIEOffsetImpl(const UnitColl &units,
+ dw_offset_t die_offset) {
return GetUnitTmpl(
[](const DWARFUnit &unit, dw_offset_t die_offset) {
return unit.ContainsDIEOffset(die_offset);
- }, die_offset);
-}
-
-DWARFDIE
-DWARFDebugInfo::GetDIEForDIEOffset(dw_offset_t die_offset) {
- DWARFUnit *cu = GetUnitContainingDIEOffset(die_offset);
- if (cu)
- return cu->GetDIE(die_offset);
- return DWARFDIE();
+ }, units, die_offset);
}
// GetDIE()
Index: lldb/source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.h
===================================================================
--- lldb/source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.h
+++ lldb/source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.h
@@ -23,9 +23,7 @@
/// Get the data that contains the DIE information for this unit.
///
/// \return
- /// The correct data (.debug_types for DWARF 4 and earlier, and
- /// .debug_info for DWARF 5 and later) for the DIE information in
- /// this unit.
+ /// .debug_info data for the DIE information in this unit.
const lldb_private::DWARFDataExtractor &GetData() const override;
/// Get the size in bytes of the header.
Index: lldb/source/Plugins/SymbolFile/DWARF/DIERef.cpp
===================================================================
--- lldb/source/Plugins/SymbolFile/DWARF/DIERef.cpp
+++ lldb/source/Plugins/SymbolFile/DWARF/DIERef.cpp
@@ -27,8 +27,8 @@
if (actual_dwarf) {
DWARFDebugInfo *debug_info = actual_dwarf->DebugInfo();
if (debug_info) {
- DWARFUnit *dwarf_cu =
- debug_info->GetUnitContainingDIEOffset(die_offset);
+ DWARFUnit *dwarf_cu = debug_info->GetUnitContainingDIEOffset(
+ die_offset, IsTypesSection());
if (dwarf_cu) {
cu_offset = dwarf_cu->GetOffset();
return;
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