jankratochvil created this revision.
jankratochvil added reviewers: clayborg, labath, davide.
jankratochvil added a project: LLDB.
Herald added subscribers: JDevlieghere, aprantl, mgorny.
Tried to address Greg Clayton's performance concerns
<https://reviews.llvm.org/D32167#1215821> here:
Rebased https://reviews.llvm.org/D32167:
real=0m0.909s user=0m14.254s
Rebased https://reviews.llvm.org/D32167 patched by
DWARFConcatenatingDataExtractor:
real=0m0.927s user=0m14.405s
Built by `clang-7.0.0-0.6.rc2.fc30.x86_64` as `RelWithDebInfo`. Tested by
`image lookup --type` (to force manual indexing) on DWARF-3 `.debug_info`-only
613MB file with no index.
There is just an additional SmallVector.size() comparison + two indirect
fetches.
With this patch one could revert the new `GetData()` from
https://reviews.llvm.org/D46606 but the code may be cleaner with it anyway. It
is just no longer needed to be virtual so this patch removes its virtuality.
Rebased https://reviews.llvm.org/D32167:
git clone -b gdbtypes git://git.jankratochvil.net/lldb
https://people.redhat.com/jkratoch/lldb-D32167.patch
Rebased https://reviews.llvm.org/D32167 patched by
DWARFConcatenatingDataExtractor - this patch:
git clone -b concat git://git.jankratochvil.net/lldb
https://people.redhat.com/jkratoch/lldb-D32167-2018-09-02.patch
Repository:
rLLDB LLDB
https://reviews.llvm.org/D51578
Files:
include/lldb/lldb-forward.h
source/Plugins/SymbolFile/DWARF/CMakeLists.txt
source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
source/Plugins/SymbolFile/DWARF/DWARFASTParserGo.cpp
source/Plugins/SymbolFile/DWARF/DWARFAttribute.h
source/Plugins/SymbolFile/DWARF/DWARFBaseDIE.cpp
source/Plugins/SymbolFile/DWARF/DWARFBaseDIE.h
source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.cpp
source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.h
source/Plugins/SymbolFile/DWARF/DWARFConcatenatingDataExtractor.cpp
source/Plugins/SymbolFile/DWARF/DWARFConcatenatingDataExtractor.h
source/Plugins/SymbolFile/DWARF/DWARFDataExtractor.h
source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.cpp
source/Plugins/SymbolFile/DWARF/DWARFDebugInfoEntry.cpp
source/Plugins/SymbolFile/DWARF/DWARFDebugInfoEntry.h
source/Plugins/SymbolFile/DWARF/DWARFFormValue.cpp
source/Plugins/SymbolFile/DWARF/DWARFFormValue.h
source/Plugins/SymbolFile/DWARF/DWARFTypeUnit.cpp
source/Plugins/SymbolFile/DWARF/DWARFTypeUnit.h
source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp
source/Plugins/SymbolFile/DWARF/DWARFUnit.h
source/Plugins/SymbolFile/DWARF/DebugNamesDWARFIndex.h
source/Plugins/SymbolFile/DWARF/HashedNameToDIE.h
source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
Index: source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
===================================================================
--- source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
+++ source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
@@ -36,6 +36,7 @@
#include "lldb/lldb-private.h"
// Project includes
+#include "DWARFConcatenatingDataExtractor.h"
#include "DWARFDataExtractor.h"
#include "DWARFDefines.h"
#include "DWARFIndex.h"
@@ -252,6 +253,9 @@
const lldb_private::DWARFDataExtractor &get_apple_objc_data();
const lldb_private::DWARFDataExtractor &get_gnu_debugaltlink();
+ const lldb_private::DWARFConcatenatingDataExtractor &
+ get_debug_concatenated_data();
+
DWARFDebugAbbrev *DebugAbbrev();
const DWARFDebugAbbrev *DebugAbbrev() const;
@@ -459,6 +463,8 @@
std::unique_ptr<SymbolFileDWARFDwp> m_dwp_symfile;
lldb_private::DWARFDataExtractor m_dwarf_data;
+ llvm::once_flag m_concatenated_data_once;
+ lldb_private::DWARFConcatenatingDataExtractor m_concatenated_data;
DWARFDataSegment m_data_debug_abbrev;
DWARFDataSegment m_data_debug_addr;
Index: source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
===================================================================
--- source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
+++ source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
@@ -580,24 +580,8 @@
const DWARFDataExtractor &
SymbolFileDWARF::GetCachedSectionData(lldb::SectionType sect_type,
DWARFDataSegment &data_segment) {
- llvm::call_once(data_segment.m_flag, [&] {
+ llvm::call_once(data_segment.m_flag, [this, sect_type, &data_segment] {
this->LoadSectionData(sect_type, std::ref(data_segment.m_data));
- if (sect_type == eSectionTypeDWARFDebugTypes) {
- // To add .debug_types support in DWARF 4 and earlier with minimally
- // invasive changes to the current DWARF parsing code, we pretend that
- // any DIEs in .debug_types start at the end of the .debug_info section.
- // All info in .debug_types is relative and has no external DIE
- // references unless thay are DW_AT_signature references, so the DIE
- // offset for things in the .debug_types. If we do this, then we can
- // just add the type units to the compile units collection and treat all
- // information just as we do for all other information in the DWARF and
- // everything just works. If we were to try to split this out, we would
- // end up having to change a TON of code. Also DWARF 5 will have compile
- // and type units in the .debug_info, so coding it this way will prepare
- // use for an easy transition to DWARF 5.
- uint64_t debug_info_size = get_debug_info_data().GetByteSize();
- data_segment.m_data.OffsetData(debug_info_size);
- }
});
return data_segment.m_data;
}
@@ -695,6 +679,15 @@
m_data_gnu_debugaltlink);
}
+const DWARFConcatenatingDataExtractor &
+ SymbolFileDWARF::get_debug_concatenated_data() {
+ llvm::call_once(m_concatenated_data_once, [&] {
+ m_concatenated_data.AppendDWARFDataExtractor(get_debug_info_data());
+ m_concatenated_data.AppendDWARFDataExtractor(get_debug_types_data());
+ });
+ return m_concatenated_data;
+}
+
DWARFDebugAbbrev *SymbolFileDWARF::DebugAbbrev() {
if (m_abbr.get() == NULL) {
const DWARFDataExtractor &debug_abbrev_data = get_debug_abbrev_data();
@@ -3239,10 +3232,12 @@
auto debug_info_data = die.GetData();
if (DWARFFormValue::IsBlockForm(form_value.Form())) {
// Retrieve the value as a block expression.
+ const DWARFDataExtractor &block_extractor =
+ debug_info_data.GetDWARFDataExtractor(form_value.BlockData());
uint32_t block_offset =
- form_value.BlockData() - debug_info_data.GetDataStart();
+ form_value.BlockData() - block_extractor.GetDataStart();
uint32_t block_length = form_value.Unsigned();
- location.CopyOpcodeData(module, debug_info_data, block_offset,
+ location.CopyOpcodeData(module, block_extractor, block_offset,
block_length);
} else if (DWARFFormValue::IsDataForm(form_value.Form())) {
// Retrieve the value as a data expression.
@@ -3262,9 +3257,12 @@
// create the variable
const_value = form_value;
}
- } else
- location.CopyOpcodeData(module, debug_info_data, data_offset,
+ } else {
+ const DWARFDataExtractor &block_extractor =
+ debug_info_data.GetDWARFDataExtractor(data_offset);
+ location.CopyOpcodeData(module, block_extractor, data_offset,
data_length);
+ }
} else {
// Retrieve the value as a string expression.
if (form_value.Form() == DW_FORM_strp) {
@@ -3274,16 +3272,21 @@
->GetAddressByteSize(),
attributes.CompileUnitAtIndex(i)->IsDWARF64());
uint32_t data_offset = attributes.DIEOffsetAtIndex(i);
+ const DWARFDataExtractor &block_extractor =
+ debug_info_data.GetDWARFDataExtractor(data_offset);
uint32_t data_length =
fixed_form_sizes.GetSize(form_value.Form());
- location.CopyOpcodeData(module, debug_info_data, data_offset,
+ location.CopyOpcodeData(module, block_extractor, data_offset,
data_length);
} else {
const char *str = form_value.AsCString();
+ const DWARFDataExtractor &block_extractor =
+ debug_info_data.GetDWARFDataExtractor(
+ (const uint8_t *)str);
uint32_t string_offset =
- str - (const char *)debug_info_data.GetDataStart();
+ str - (const char *)block_extractor.GetDataStart();
uint32_t string_length = strlen(str) + 1;
- location.CopyOpcodeData(module, debug_info_data,
+ location.CopyOpcodeData(module, block_extractor,
string_offset, string_length);
}
}
@@ -3295,10 +3298,13 @@
if (DWARFFormValue::IsBlockForm(form_value.Form())) {
auto data = die.GetData();
+ const DWARFDataExtractor &block_extractor =
+ data.GetDWARFDataExtractor(form_value.BlockData());
uint32_t block_offset =
- form_value.BlockData() - data.GetDataStart();
+ form_value.BlockData() - block_extractor.GetDataStart();
uint32_t block_length = form_value.Unsigned();
- location.CopyOpcodeData(module, data, block_offset, block_length);
+ location.CopyOpcodeData(
+ module, block_extractor, block_offset, block_length);
} else {
const DWARFDataExtractor &debug_loc_data = get_debug_loc_data();
const dw_offset_t debug_loc_offset = form_value.Unsigned();
Index: source/Plugins/SymbolFile/DWARF/HashedNameToDIE.h
===================================================================
--- source/Plugins/SymbolFile/DWARF/HashedNameToDIE.h
+++ source/Plugins/SymbolFile/DWARF/HashedNameToDIE.h
@@ -17,6 +17,7 @@
#include "lldb/Utility/RegularExpression.h"
#include "lldb/lldb-defines.h"
+#include "DWARFDataExtractor.h"
#include "DWARFDefines.h"
#include "DWARFFormValue.h"
#include "NameToDIE.h"
Index: source/Plugins/SymbolFile/DWARF/DebugNamesDWARFIndex.h
===================================================================
--- source/Plugins/SymbolFile/DWARF/DebugNamesDWARFIndex.h
+++ source/Plugins/SymbolFile/DWARF/DebugNamesDWARFIndex.h
@@ -10,6 +10,7 @@
#ifndef LLDB_DEBUGNAMESDWARFINDEX_H
#define LLDB_DEBUGNAMESDWARFINDEX_H
+#include "Plugins/SymbolFile/DWARF/DWARFDataExtractor.h"
#include "Plugins/SymbolFile/DWARF/DWARFIndex.h"
#include "Plugins/SymbolFile/DWARF/LogChannelDWARF.h"
#include "Plugins/SymbolFile/DWARF/ManualDWARFIndex.h"
Index: source/Plugins/SymbolFile/DWARF/DWARFUnit.h
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFUnit.h
+++ source/Plugins/SymbolFile/DWARF/DWARFUnit.h
@@ -43,7 +43,7 @@
virtual ~DWARFUnit();
bool ExtractHeader(SymbolFileDWARF *dwarf,
- const lldb_private::DWARFDataExtractor &data,
+ const lldb_private::DWARFConcatenatingDataExtractor &data,
lldb::offset_t *offset_ptr);
DWARFTypeUnit *GetAsTypeUnit();
@@ -79,7 +79,7 @@
/// @return
/// The correct data for the DIE information in this unit.
//------------------------------------------------------------------
- virtual const lldb_private::DWARFDataExtractor &GetData() const = 0;
+ const lldb_private::DWARFConcatenatingDataExtractor &GetData() const;
//------------------------------------------------------------------
/// Get the size in bytes of the compile unit header.
///
Index: source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp
+++ source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp
@@ -61,7 +61,7 @@
// We are in our compile unit, parse starting at the offset we were told to
// parse
- const DWARFDataExtractor &data = GetData();
+ const DWARFConcatenatingDataExtractor &data = GetData();
DWARFFormValue::FixedFormSizes fixed_form_sizes =
DWARFFormValue::GetFixedFormSizesForAddressSize(GetAddressByteSize(),
IsDWARF64());
@@ -183,7 +183,7 @@
uint32_t depth = 0;
// We are in our compile unit, parse starting at the offset we were told to
// parse
- const DWARFDataExtractor &data = GetData();
+ const DWARFConcatenatingDataExtractor &data = GetData();
std::vector<uint32_t> die_index_stack;
die_index_stack.reserve(32);
die_index_stack.push_back(0);
@@ -786,15 +786,15 @@
bool
DWARFUnit::ExtractHeader(SymbolFileDWARF *dwarf,
- const lldb_private::DWARFDataExtractor &data,
+ const DWARFConcatenatingDataExtractor &data,
lldb::offset_t *offset_ptr) {
m_offset = *offset_ptr;
if (data.ValidOffset(*offset_ptr)) {
dw_offset_t abbr_offset;
const DWARFDebugAbbrev *abbr = dwarf->DebugAbbrev();
m_length = data.GetDWARFInitialLength(offset_ptr);
- m_is_dwarf64 = data.IsDWARF64();
+ m_is_dwarf64 = data.IsDWARF64(*offset_ptr);
m_version = data.GetU16(offset_ptr);
abbr_offset = data.GetDWARFOffset(offset_ptr);
m_addr_size = data.GetU8(offset_ptr);
@@ -816,3 +816,6 @@
return false;
}
+const lldb_private::DWARFConcatenatingDataExtractor &DWARFUnit::GetData() const {
+ return m_dwarf->get_debug_concatenated_data();
+}
Index: source/Plugins/SymbolFile/DWARF/DWARFTypeUnit.h
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFTypeUnit.h
+++ source/Plugins/SymbolFile/DWARF/DWARFTypeUnit.h
@@ -18,23 +18,13 @@
public:
virtual ~DWARFTypeUnit();
- static DWARFTypeUnitSP Extract(SymbolFileDWARF *dwarf2Data,
- const lldb_private::DWARFDataExtractor &data,
- lldb::offset_t *offset_ptr);
+ static DWARFTypeUnitSP Extract(
+ SymbolFileDWARF *dwarf2Data,
+ const lldb_private::DWARFConcatenatingDataExtractor &data,
+ lldb::offset_t *offset_ptr);
void Dump(lldb_private::Stream *s) const override;
- //------------------------------------------------------------------
- /// 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.
- //------------------------------------------------------------------
- const lldb_private::DWARFDataExtractor &GetData() const override;
-
-
//------------------------------------------------------------------
/// Get the size in bytes of the header.
///
Index: source/Plugins/SymbolFile/DWARF/DWARFTypeUnit.cpp
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFTypeUnit.cpp
+++ source/Plugins/SymbolFile/DWARF/DWARFTypeUnit.cpp
@@ -30,7 +30,7 @@
}
DWARFTypeUnitSP DWARFTypeUnit::Extract(SymbolFileDWARF *dwarf,
- const lldb_private::DWARFDataExtractor &data, lldb::offset_t *offset_ptr) {
+ const DWARFConcatenatingDataExtractor &data, lldb::offset_t *offset_ptr) {
// std::make_shared would require the ctor to be public.
std::shared_ptr<DWARFTypeUnit> cu_sp(new DWARFTypeUnit(dwarf));
// Out of memory?
@@ -51,13 +51,3 @@
// unit offset to ensure we get the correct DIE.
return GetDIE(GetTypeUnitDIEOffset());
}
-
-const lldb_private::DWARFDataExtractor &DWARFTypeUnit::GetData() const {
- // In DWARF 5, type units are in the .debug_info section. Prior to DWARF 5
- // type units are in the .debug_types section.
- if (GetVersion() < 5)
- return m_dwarf->get_debug_types_data();
- else
- return m_dwarf->get_debug_info_data();
-}
-
Index: source/Plugins/SymbolFile/DWARF/DWARFFormValue.h
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFFormValue.h
+++ source/Plugins/SymbolFile/DWARF/DWARFFormValue.h
@@ -11,7 +11,7 @@
#define SymbolFileDWARF_DWARFFormValue_h_
#include "DWARFDIE.h"
-#include "DWARFDataExtractor.h"
+#include "DWARFConcatenatingDataExtractor.h"
#include <stddef.h> // for NULL
class DWARFUnit;
@@ -63,7 +63,7 @@
void SetForm(dw_form_t form) { m_form = form; }
const ValueType &Value() const { return m_value; }
void Dump(lldb_private::Stream &s) const;
- bool ExtractValue(const lldb_private::DWARFDataExtractor &data,
+ bool ExtractValue(const lldb_private::DWARFConcatenatingDataExtractor &data,
lldb::offset_t *offset_ptr);
const uint8_t *BlockData() const;
uint64_t Reference() const;
@@ -77,11 +77,13 @@
const char *AsCString() const;
dw_addr_t Address() const;
bool IsValid() const { return m_form != 0; }
- bool SkipValue(const lldb_private::DWARFDataExtractor &debug_info_data,
- lldb::offset_t *offset_ptr) const;
- static bool SkipValue(const dw_form_t form,
- const lldb_private::DWARFDataExtractor &debug_info_data,
- lldb::offset_t *offset_ptr, const DWARFUnit *cu);
+ bool SkipValue(
+ const lldb_private::DWARFConcatenatingDataExtractor &debug_info_data,
+ lldb::offset_t *offset_ptr) const;
+ static bool SkipValue(
+ const dw_form_t form,
+ const lldb_private::DWARFConcatenatingDataExtractor &debug_info_data,
+ lldb::offset_t *offset_ptr, const DWARFUnit *cu);
static bool IsBlockForm(const dw_form_t form);
static bool IsDataForm(const dw_form_t form);
static FixedFormSizes GetFixedFormSizesForAddressSize(uint8_t addr_size,
Index: source/Plugins/SymbolFile/DWARF/DWARFFormValue.cpp
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFFormValue.cpp
+++ source/Plugins/SymbolFile/DWARF/DWARFFormValue.cpp
@@ -163,7 +163,7 @@
memset(&m_value, 0, sizeof(m_value));
}
-bool DWARFFormValue::ExtractValue(const DWARFDataExtractor &data,
+bool DWARFFormValue::ExtractValue(const DWARFConcatenatingDataExtractor &data,
lldb::offset_t *offset_ptr) {
bool indirect = false;
bool is_block = false;
@@ -288,15 +288,15 @@
return true;
}
-bool DWARFFormValue::SkipValue(const DWARFDataExtractor &debug_info_data,
- lldb::offset_t *offset_ptr) const {
+bool DWARFFormValue::SkipValue(
+ const DWARFConcatenatingDataExtractor &debug_info_data,
+ lldb::offset_t *offset_ptr) const {
return DWARFFormValue::SkipValue(m_form, debug_info_data, offset_ptr, m_cu);
}
-bool DWARFFormValue::SkipValue(dw_form_t form,
- const DWARFDataExtractor &debug_info_data,
- lldb::offset_t *offset_ptr,
- const DWARFUnit *cu) {
+bool DWARFFormValue::SkipValue(
+ dw_form_t form, const DWARFConcatenatingDataExtractor &debug_info_data,
+ lldb::offset_t *offset_ptr, const DWARFUnit *cu) {
uint8_t ref_addr_size;
switch (form) {
// Blocks if inlined data that have a length field and the data bytes inlined
Index: source/Plugins/SymbolFile/DWARF/DWARFDebugInfoEntry.h
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFDebugInfoEntry.h
+++ source/Plugins/SymbolFile/DWARF/DWARFDebugInfoEntry.h
@@ -72,10 +72,11 @@
const DWARFUnit *cu,
DWARFDebugAranges *debug_aranges) const;
- bool FastExtract(const lldb_private::DWARFDataExtractor &debug_info_data,
- const DWARFUnit *cu,
- const DWARFFormValue::FixedFormSizes &fixed_form_sizes,
- lldb::offset_t *offset_ptr);
+ bool FastExtract(
+ const lldb_private::DWARFConcatenatingDataExtractor &debug_info_data,
+ const DWARFUnit *cu,
+ const DWARFFormValue::FixedFormSizes &fixed_form_sizes,
+ lldb::offset_t *offset_ptr);
bool Extract(SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu,
lldb::offset_t *offset_ptr);
Index: source/Plugins/SymbolFile/DWARF/DWARFDebugInfoEntry.cpp
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFDebugInfoEntry.cpp
+++ source/Plugins/SymbolFile/DWARF/DWARFDebugInfoEntry.cpp
@@ -34,7 +34,7 @@
extern int g_verbose;
bool DWARFDebugInfoEntry::FastExtract(
- const DWARFDataExtractor &debug_info_data, const DWARFUnit *cu,
+ const DWARFConcatenatingDataExtractor &debug_info_data, const DWARFUnit *cu,
const DWARFFormValue::FixedFormSizes &fixed_form_sizes,
lldb::offset_t *offset_ptr) {
m_offset = *offset_ptr;
@@ -196,7 +196,7 @@
bool DWARFDebugInfoEntry::Extract(SymbolFileDWARF *dwarf2Data,
const DWARFUnit *cu,
lldb::offset_t *offset_ptr) {
- const DWARFDataExtractor &debug_info_data = cu->GetData();
+ const DWARFConcatenatingDataExtractor &debug_info_data = cu->GetData();
// const DWARFDataExtractor& debug_str_data =
// dwarf2Data->get_debug_str_data();
const uint32_t cu_end_offset = cu->GetNextCompileUnitOffset();
@@ -403,7 +403,7 @@
lldb::ModuleSP module = dwarf2Data->GetObjectFile()->GetModule();
if (abbrevDecl) {
- const DWARFDataExtractor &debug_info_data = cu->GetData();
+ const DWARFConcatenatingDataExtractor &debug_info_data = cu->GetData();
if (!debug_info_data.ValidOffset(offset))
return false;
@@ -514,10 +514,12 @@
case DW_AT_frame_base:
if (frame_base) {
if (form_value.BlockData()) {
- uint32_t block_offset =
- form_value.BlockData() - debug_info_data.GetDataStart();
+ const DWARFDataExtractor &block_extractor =
+ debug_info_data.GetDWARFDataExtractor(form_value.BlockData());
+ uint32_t block_offset = form_value.BlockData()
+ - block_extractor.GetDataStart();
uint32_t block_length = form_value.Unsigned();
- frame_base->SetOpcodeData(module, debug_info_data, block_offset,
+ frame_base->SetOpcodeData(module, block_extractor, block_offset,
block_length);
} else {
const DWARFDataExtractor &debug_loc_data =
@@ -586,7 +588,7 @@
void DWARFDebugInfoEntry::Dump(SymbolFileDWARF *dwarf2Data,
const DWARFUnit *cu, Stream &s,
uint32_t recurse_depth) const {
- const DWARFDataExtractor &debug_info_data = cu->GetData();
+ const DWARFConcatenatingDataExtractor &debug_info_data = cu->GetData();
lldb::offset_t offset = m_offset;
if (debug_info_data.ValidOffset(offset)) {
@@ -612,8 +614,9 @@
for (i = 0; i < numAttributes; ++i) {
abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form);
- DumpAttribute(dwarf2Data, cu, debug_info_data, &offset, s, attr,
- form);
+ DumpAttribute(dwarf2Data, cu,
+ debug_info_data.GetDWARFDataExtractor(offset), &offset,
+ s, attr, form);
}
const DWARFDebugInfoEntry *child = GetFirstChild();
@@ -779,7 +782,7 @@
}
if (abbrevDecl) {
- const DWARFDataExtractor &debug_info_data = cu->GetData();
+ const DWARFConcatenatingDataExtractor &debug_info_data = cu->GetData();
if (fixed_form_sizes.Empty())
fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize(
@@ -861,7 +864,7 @@
uint32_t attr_idx = abbrevDecl->FindAttributeIndex(attr);
if (attr_idx != DW_INVALID_INDEX) {
- const DWARFDataExtractor &debug_info_data = cu->GetData();
+ const DWARFConcatenatingDataExtractor &debug_info_data = cu->GetData();
uint32_t idx = 0;
while (idx < attr_idx)
Index: source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.cpp
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.cpp
+++ source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.cpp
@@ -103,9 +103,11 @@
lldb::offset_t offset = 0;
DWARFCompileUnitSP cu_sp;
- const auto &debug_info_data = m_dwarf2Data->get_debug_info_data();
- while ((cu_sp = DWARFCompileUnit::Extract(m_dwarf2Data, debug_info_data,
- &offset))) {
+ const DWARFDataExtractor &debug_info_data =
+ m_dwarf2Data->get_debug_info_data();
+ while (offset < debug_info_data.GetByteSize()
+ && (cu_sp = DWARFCompileUnit::Extract(
+ m_dwarf2Data, debug_info_data, &offset))) {
m_compile_units.push_back(cu_sp);
offset = cu_sp->GetNextCompileUnitOffset();
}
@@ -119,15 +121,12 @@
// types in the .debug_types to have a unique DIE offset that is:
// offset = sizeof(.debug_info) + debug_type_offset
//
- // So below we set "offset" to be the size of the .debug_info section. We have
- // modified the debug_types_data to know that its first byte starts at this
- // offset.
- auto debug_types_data = m_dwarf2Data->get_debug_types_data();
- if (debug_types_data.GetByteSize() == 0)
- return;
- offset = debug_info_data.GetByteSize();
+ // We must use get_debug_concatenated_data() so that .debug_types start at
+ // size of the .debug_info section.
+ const DWARFConcatenatingDataExtractor &debug_concatenated_data =
+ m_dwarf2Data->get_debug_concatenated_data();
DWARFTypeUnitSP tu_sp;
- while ((tu_sp = DWARFTypeUnit::Extract(m_dwarf2Data, debug_types_data,
+ while ((tu_sp = DWARFTypeUnit::Extract(m_dwarf2Data, debug_concatenated_data,
&offset))) {
m_type_sig_to_cu_index[tu_sp->GetTypeSignature()] = m_compile_units.size();
m_compile_units.push_back(tu_sp);
Index: source/Plugins/SymbolFile/DWARF/DWARFDataExtractor.h
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFDataExtractor.h
+++ source/Plugins/SymbolFile/DWARF/DWARFDataExtractor.h
@@ -32,30 +32,6 @@
size_t GetDWARFSizeOfOffset() const { return m_is_dwarf64 ? 8 : 4; }
bool IsDWARF64() const { return m_is_dwarf64; }
- //------------------------------------------------------------------
- /// Slide the data in the buffer so that access to the data will
- /// start at offset \a offset.
- ///
- /// This is currently used to provide access to the .debug_types
- /// section and pretend it starts at at offset of the size of the
- /// .debug_info section. This allows a minimally invasive change to
- /// add support for .debug_types by allowing all DIEs to have unique
- /// offsets and thus allowing no code to change in the DWARF parser.
- /// Modifying the offsets in the .debug_types doesn't affect
- /// anything because since all info in the .debug_types is type unit
- /// relative and no types within a type unit can refer to any DIEs
- /// outside of the type unit without using DW_AT_signature. It also
- /// sets us up to move to DWARF5 where there is no .debug_types
- /// section as compile units and type units are in the .debug_info.
- ///
- /// @param[in] offset
- /// The amount to slide the data contents by.
- //------------------------------------------------------------------
- void OffsetData(lldb::offset_t offset) {
- if (GetByteSize())
- m_start -= offset;
- }
-
protected:
mutable bool m_is_dwarf64;
};
Index: source/Plugins/SymbolFile/DWARF/DWARFConcatenatingDataExtractor.h
===================================================================
--- /dev/null
+++ source/Plugins/SymbolFile/DWARF/DWARFConcatenatingDataExtractor.h
@@ -0,0 +1,166 @@
+//===-- DWARFConcatenatingDataExtractor.h -----------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_DWARFConcatenatingDataExtractor_h_
+#define liblldb_DWARFConcatenatingDataExtractor_h_
+
+#include "DWARFDataExtractor.h"
+
+// Other libraries and framework includes.
+#include "lldb/Core/dwarf.h"
+
+namespace lldb_private {
+
+class DWARFConcatenatingDataExtractor {
+public:
+ DWARFConcatenatingDataExtractor(const DWARFDataExtractor &extractor)
+ : m_extractors({&extractor}) {}
+ DWARFConcatenatingDataExtractor() {}
+ void AppendDWARFDataExtractor(const DWARFDataExtractor &extractor) {
+ if (extractor.GetByteSize())
+ m_extractors.push_back(&extractor);
+ }
+ const DWARFDataExtractor &GetDWARFDataExtractor_slow(
+ const uint8_t *inner) const;
+ inline const DWARFDataExtractor &GetDWARFDataExtractor(
+ const uint8_t *inner) const;
+ inline const DWARFDataExtractor &GetDWARFDataExtractor(
+ lldb::offset_t offset) const {
+ return offset_to_extractor(offset, nullptr);
+ }
+ inline bool IsDWARF64(lldb::offset_t offset) const
+ { return GetDWARFDataExtractor(offset).IsDWARF64(); }
+ // forwarder-based implementation would assert on out of bound 'offset'.
+ bool ValidOffset(lldb::offset_t offset) const;
+
+#define FORWARDER(Extractor, FuncName, RetType, ParamListParen, ...) \
+ inline RetType FuncName ParamListParen const \
+ { return forwarder<RetType, Extractor>(&Extractor::FuncName, __VA_ARGS__); }
+ FORWARDER(DataExtractor, GetFloat, float,
+ (lldb::offset_t *offset_ptr), offset_ptr)
+ FORWARDER(DataExtractor, GetDouble, double,
+ (lldb::offset_t *offset_ptr), offset_ptr)
+ FORWARDER(DataExtractor, GetLongDouble, long double,
+ (lldb::offset_t *offset_ptr), offset_ptr)
+ FORWARDER(DataExtractor, GetMaxU32, uint32_t,
+ (lldb::offset_t *offset_ptr, size_t byte_size), offset_ptr, byte_size)
+ FORWARDER(DataExtractor, GetMaxU64, uint64_t,
+ (lldb::offset_t *offset_ptr, size_t byte_size), offset_ptr, byte_size)
+ FORWARDER(DataExtractor, GetMaxU64_unchecked, uint64_t,
+ (lldb::offset_t *offset_ptr, size_t byte_size), offset_ptr, byte_size)
+ FORWARDER(DataExtractor, GetMaxS64, int64_t,
+ (lldb::offset_t *offset_ptr, size_t byte_size), offset_ptr, byte_size)
+ FORWARDER(DataExtractor, GetMaxU64Bitfield, uint64_t,
+ (lldb::offset_t *offset_ptr, size_t size, uint32_t bitfield_bit_size,
+ uint32_t bitfield_bit_offset),
+ offset_ptr, size, bitfield_bit_size, bitfield_bit_offset)
+ FORWARDER(DataExtractor, GetMaxS64Bitfield, int64_t,
+ (lldb::offset_t *offset_ptr, size_t size, uint32_t bitfield_bit_size,
+ uint32_t bitfield_bit_offset),
+ offset_ptr, size, bitfield_bit_size, bitfield_bit_offset)
+ FORWARDER(DataExtractor, GetPointer, uint64_t,
+ (lldb::offset_t *offset_ptr), offset_ptr)
+ FORWARDER(DataExtractor, GetU8, uint8_t,
+ (lldb::offset_t *offset_ptr), offset_ptr)
+ FORWARDER(DataExtractor, GetU8_unchecked, uint8_t,
+ (lldb::offset_t *offset_ptr), offset_ptr)
+ FORWARDER(DataExtractor, GetU16_unchecked, uint16_t,
+ (lldb::offset_t *offset_ptr), offset_ptr)
+ FORWARDER(DataExtractor, GetU32_unchecked, uint32_t,
+ (lldb::offset_t *offset_ptr), offset_ptr)
+ FORWARDER(DataExtractor, GetU64_unchecked, uint64_t,
+ (lldb::offset_t *offset_ptr), offset_ptr)
+ FORWARDER(DataExtractor, GetU8, void *,
+ (lldb::offset_t *offset_ptr, void *dst, uint32_t count),
+ offset_ptr, dst, count)
+ FORWARDER(DataExtractor, GetU16, uint16_t,
+ (lldb::offset_t *offset_ptr), offset_ptr)
+ FORWARDER(DataExtractor, GetU16, void *,
+ (lldb::offset_t *offset_ptr, void *dst, uint32_t count),
+ offset_ptr, dst, count)
+ FORWARDER(DataExtractor, GetU32, uint32_t,
+ (lldb::offset_t *offset_ptr), offset_ptr)
+ FORWARDER(DataExtractor, GetU32, void *,
+ (lldb::offset_t *offset_ptr, void *dst, uint32_t count),
+ offset_ptr, dst, count)
+ FORWARDER(DataExtractor, GetU64, uint64_t,
+ (lldb::offset_t *offset_ptr), offset_ptr)
+ FORWARDER(DataExtractor, GetU64, void *,
+ (lldb::offset_t *offset_ptr, void *dst, uint32_t count),
+ offset_ptr, dst, count)
+ FORWARDER(DataExtractor, GetSLEB128, int64_t,
+ (lldb::offset_t *offset_ptr), offset_ptr)
+ FORWARDER(DataExtractor, GetULEB128, uint64_t,
+ (lldb::offset_t *offset_ptr), offset_ptr)
+ FORWARDER(DataExtractor, PeekData, const uint8_t *,
+ (lldb::offset_t offset, lldb::offset_t length), offset, length)
+ FORWARDER(DataExtractor, GetCStr, const char *,
+ (lldb::offset_t *offset_ptr), offset_ptr)
+ FORWARDER(DataExtractor, Skip_LEB128, uint32_t,
+ (lldb::offset_t *offset_ptr), offset_ptr)
+ FORWARDER(DataExtractor, ValidOffsetForDataOfSize, bool,
+ (lldb::offset_t offset, lldb::offset_t length), offset, length)
+ FORWARDER(DWARFDataExtractor, GetDWARFOffset, dw_offset_t,
+ (lldb::offset_t *offset_ptr), offset_ptr)
+ FORWARDER(DWARFDataExtractor, GetDWARFInitialLength, uint64_t,
+ (lldb::offset_t *offset_ptr), offset_ptr)
+#undef FORWARDER
+
+private:
+ const DWARFDataExtractor &offset_to_extractor_slow(lldb::offset_t offset,
+ lldb::offset_t *extractor_offsetp) const;
+ inline const DWARFDataExtractor &offset_to_extractor(lldb::offset_t offset,
+ lldb::offset_t *extractor_offsetp) const;
+ template<class RetType, class Extractor, class... Args>
+ inline RetType forwarder(
+ RetType (Extractor::*mptr)(lldb::offset_t *offset_ptr, Args...) const,
+ lldb::offset_t *offset_ptr, Args... args) const {
+ lldb::offset_t extractor_offset;
+ const Extractor &extractor =
+ offset_to_extractor(*offset_ptr, &extractor_offset);
+ *offset_ptr -= extractor_offset;
+ RetType retval = (extractor.*mptr)(offset_ptr, std::forward<Args>(args)...);
+ *offset_ptr += extractor_offset;
+ return retval;
+ }
+ template<class RetType, class Extractor, class... Args>
+ inline RetType forwarder(
+ RetType (Extractor::*mptr)(lldb::offset_t offset, Args...) const,
+ lldb::offset_t offset, Args... args) const {
+ lldb::offset_t extractor_offset;
+ const Extractor &extractor = offset_to_extractor(offset, &extractor_offset);
+ offset -= extractor_offset;
+ return (extractor.*mptr)(offset, std::forward<Args>(args)...);
+ }
+
+ llvm::SmallVector<const DWARFDataExtractor *, 2> m_extractors;
+};
+
+const DWARFDataExtractor &DWARFConcatenatingDataExtractor::offset_to_extractor(
+ lldb::offset_t offset, lldb::offset_t *extractor_offsetp) const {
+ if (extractor_offsetp)
+ *extractor_offsetp = 0;
+ if (m_extractors.size() == 1)
+ return *m_extractors[0];
+
+ return offset_to_extractor_slow(offset, extractor_offsetp);
+}
+
+const DWARFDataExtractor &
+ DWARFConcatenatingDataExtractor::GetDWARFDataExtractor(
+ const uint8_t *inner) const {
+ if (m_extractors.size() == 1)
+ return *m_extractors[0];
+
+ return GetDWARFDataExtractor_slow(inner);
+}
+
+}
+
+#endif // liblldb_DWARFConcatenatingDataExtractor_h_
Index: source/Plugins/SymbolFile/DWARF/DWARFConcatenatingDataExtractor.cpp
===================================================================
--- /dev/null
+++ source/Plugins/SymbolFile/DWARF/DWARFConcatenatingDataExtractor.cpp
@@ -0,0 +1,48 @@
+//===-- DWARFConcatenatingDataExtractor.cpp ---------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "DWARFConcatenatingDataExtractor.h"
+#include "lldb/Utility/LLDBAssert.h"
+
+namespace lldb_private {
+
+const DWARFDataExtractor &
+ DWARFConcatenatingDataExtractor::offset_to_extractor_slow(
+ lldb::offset_t offset, lldb::offset_t *extractor_offsetp) const {
+ for (const DWARFDataExtractor *extractorp : m_extractors) {
+ if (offset < extractorp->GetByteSize())
+ return *extractorp;
+ offset -= extractorp->GetByteSize();
+ if (extractor_offsetp)
+ *extractor_offsetp += extractorp->GetByteSize();
+ }
+ lldbassert(0);
+ return *m_extractors[0];
+}
+
+const DWARFDataExtractor &
+ DWARFConcatenatingDataExtractor::GetDWARFDataExtractor_slow(
+ const uint8_t *inner) const {
+ for (const DWARFDataExtractor *extractorp : m_extractors)
+ if (inner >= extractorp->GetDataStart() && inner < extractorp->GetDataEnd())
+ return *extractorp;
+ lldbassert(0);
+ return *m_extractors[0];
+}
+
+bool DWARFConcatenatingDataExtractor::ValidOffset(lldb::offset_t offset) const {
+ for (const DWARFDataExtractor *extractorp : m_extractors) {
+ if (offset < extractorp->GetByteSize())
+ return true;
+ offset -= extractorp->GetByteSize();
+ }
+ return false;
+}
+
+}
Index: source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.h
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.h
+++ source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.h
@@ -19,16 +19,6 @@
lldb::offset_t *offset_ptr);
void Dump(lldb_private::Stream *s) const override;
- //------------------------------------------------------------------
- /// 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.
- //------------------------------------------------------------------
- const lldb_private::DWARFDataExtractor &GetData() const override;
-
//------------------------------------------------------------------
/// Get the size in bytes of the header.
///
Index: source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.cpp
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.cpp
+++ source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.cpp
@@ -35,8 +35,3 @@
m_offset, m_length, m_version, GetAbbrevOffset(), m_addr_size,
GetNextCompileUnitOffset());
}
-
-
-const lldb_private::DWARFDataExtractor &DWARFCompileUnit::GetData() const {
- return m_dwarf->get_debug_info_data();
-}
Index: source/Plugins/SymbolFile/DWARF/DWARFBaseDIE.h
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFBaseDIE.h
+++ source/Plugins/SymbolFile/DWARF/DWARFBaseDIE.h
@@ -87,7 +87,7 @@
//
// Clients must validate that this object is valid before calling this.
//----------------------------------------------------------------------
- const lldb_private::DWARFDataExtractor &GetData() const;
+ const lldb_private::DWARFConcatenatingDataExtractor &GetData() const;
//----------------------------------------------------------------------
// Accessing information about a DIE
Index: source/Plugins/SymbolFile/DWARF/DWARFBaseDIE.cpp
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFBaseDIE.cpp
+++ source/Plugins/SymbolFile/DWARF/DWARFBaseDIE.cpp
@@ -186,7 +186,7 @@
return !(lhs == rhs);
}
-const DWARFDataExtractor &DWARFBaseDIE::GetData() const {
+const DWARFConcatenatingDataExtractor &DWARFBaseDIE::GetData() const {
// Clients must check if this DIE is valid before calling this function.
assert(IsValid());
return m_cu->GetData();
Index: source/Plugins/SymbolFile/DWARF/DWARFAttribute.h
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFAttribute.h
+++ source/Plugins/SymbolFile/DWARF/DWARFAttribute.h
@@ -56,7 +56,7 @@
return m_infos[i].cu;
}
dw_offset_t DIEOffsetAtIndex(uint32_t i) const {
- return m_infos[i].die_offset;
+ return /*m_infos[i].cu->GetOffset() +*/ m_infos[i].die_offset;
}
dw_attr_t AttributeAtIndex(uint32_t i) const {
return m_infos[i].attr.get_attr();
Index: source/Plugins/SymbolFile/DWARF/DWARFASTParserGo.cpp
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFASTParserGo.cpp
+++ source/Plugins/SymbolFile/DWARF/DWARFASTParserGo.cpp
@@ -655,7 +655,8 @@
if (form_value.BlockData()) {
Value initialValue(0);
Value memberOffset(0);
- const DWARFDataExtractor &debug_info_data = die.GetData();
+ const DWARFDataExtractor &debug_info_data =
+ die.GetData().GetDWARFDataExtractor(form_value.BlockData());
uint32_t block_length = form_value.Unsigned();
uint32_t block_offset =
form_value.BlockData() - debug_info_data.GetDataStart();
Index: source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
+++ source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
@@ -2778,7 +2778,8 @@
if (form_value.BlockData()) {
Value initialValue(0);
Value memberOffset(0);
- const DWARFDataExtractor &debug_info_data = die.GetData();
+ const DWARFDataExtractor &debug_info_data =
+ die.GetData().GetDWARFDataExtractor(form_value.BlockData());
uint32_t block_length = form_value.Unsigned();
uint32_t block_offset =
form_value.BlockData() - debug_info_data.GetDataStart();
@@ -3230,7 +3231,8 @@
if (form_value.BlockData()) {
Value initialValue(0);
Value memberOffset(0);
- const DWARFDataExtractor &debug_info_data = die.GetData();
+ const DWARFDataExtractor &debug_info_data =
+ die.GetData().GetDWARFDataExtractor(form_value.BlockData());
uint32_t block_length = form_value.Unsigned();
uint32_t block_offset =
form_value.BlockData() - debug_info_data.GetDataStart();
Index: source/Plugins/SymbolFile/DWARF/CMakeLists.txt
===================================================================
--- source/Plugins/SymbolFile/DWARF/CMakeLists.txt
+++ source/Plugins/SymbolFile/DWARF/CMakeLists.txt
@@ -10,6 +10,7 @@
DWARFAttribute.cpp
DWARFBaseDIE.cpp
DWARFCompileUnit.cpp
+ DWARFConcatenatingDataExtractor.cpp
DWARFDataExtractor.cpp
DWARFDebugAbbrev.cpp
DWARFDebugAranges.cpp
Index: include/lldb/lldb-forward.h
===================================================================
--- include/lldb/lldb-forward.h
+++ include/lldb/lldb-forward.h
@@ -76,6 +76,7 @@
class ConstString;
class CXXSyntheticChildren;
class DWARFCallFrameInfo;
+class DWARFConcatenatingDataExtractor;
class DWARFDataExtractor;
class DWARFExpression;
class DataBuffer;
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