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| //===-- DebugNamesDWARFIndex.cpp -------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "Plugins/SymbolFile/DWARF/DebugNamesDWARFIndex.h"
#include "Plugins/SymbolFile/DWARF/DWARFDebugInfo.h"
#include "Plugins/SymbolFile/DWARF/DWARFDeclContext.h"
#include "Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.h"
#include "lldb/Utility/RegularExpression.h"
#include "lldb/Utility/Stream.h"
using namespace lldb_private;
using namespace lldb;
llvm::Expected<std::unique_ptr<DebugNamesDWARFIndex>>
DebugNamesDWARFIndex::Create(Module &module, DWARFDataExtractor debug_names,
DWARFDataExtractor debug_str,
DWARFDebugInfo *debug_info) {
if (!debug_info) {
return llvm::make_error<llvm::StringError>("debug info null",
llvm::inconvertibleErrorCode());
}
auto index_up = std::make_unique<DebugNames>(debug_names.GetAsLLVM(),
debug_str.GetAsLLVM());
if (llvm::Error E = index_up->extract())
return std::move(E);
return std::unique_ptr<DebugNamesDWARFIndex>(new DebugNamesDWARFIndex(
module, std::move(index_up), debug_names, debug_str, *debug_info));
}
llvm::DenseSet<dw_offset_t>
DebugNamesDWARFIndex::GetUnits(const DebugNames &debug_names) {
llvm::DenseSet<dw_offset_t> result;
for (const DebugNames::NameIndex &ni : debug_names) {
for (uint32_t cu = 0; cu < ni.getCUCount(); ++cu)
result.insert(ni.getCUOffset(cu));
}
return result;
}
llvm::Optional<DIERef>
DebugNamesDWARFIndex::ToDIERef(const DebugNames::Entry &entry) {
llvm::Optional<uint64_t> cu_offset = entry.getCUOffset();
if (!cu_offset)
return llvm::None;
DWARFUnit *cu = m_debug_info.GetUnitAtOffset(DIERef::Section::DebugInfo, *cu_offset);
if (!cu)
return llvm::None;
// This initializes the DWO symbol file. It's not possible for
// GetDwoSymbolFile to call this automatically because of mutual recursion
// between this and DWARFDebugInfoEntry::GetAttributeValue.
cu->ExtractUnitDIEIfNeeded();
cu = &cu->GetNonSkeletonUnit();
if (llvm::Optional<uint64_t> die_offset = entry.getDIEUnitOffset())
return DIERef(cu->GetSymbolFileDWARF().GetDwoNum(),
DIERef::Section::DebugInfo, cu->GetOffset() + *die_offset);
return llvm::None;
}
void DebugNamesDWARFIndex::Append(const DebugNames::Entry &entry,
DIEArray &offsets) {
if (llvm::Optional<DIERef> ref = ToDIERef(entry))
offsets.push_back(*ref);
}
void DebugNamesDWARFIndex::MaybeLogLookupError(llvm::Error error,
const DebugNames::NameIndex &ni,
llvm::StringRef name) {
// Ignore SentinelErrors, log everything else.
LLDB_LOG_ERROR(
LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS),
handleErrors(std::move(error), [](const DebugNames::SentinelError &) {}),
"Failed to parse index entries for index at {1:x}, name {2}: {0}",
ni.getUnitOffset(), name);
}
void DebugNamesDWARFIndex::GetGlobalVariables(ConstString basename,
DIEArray &offsets) {
m_fallback.GetGlobalVariables(basename, offsets);
for (const DebugNames::Entry &entry :
m_debug_names_up->equal_range(basename.GetStringRef())) {
if (entry.tag() != DW_TAG_variable)
continue;
Append(entry, offsets);
}
}
void DebugNamesDWARFIndex::GetGlobalVariables(const RegularExpression ®ex,
DIEArray &offsets) {
m_fallback.GetGlobalVariables(regex, offsets);
for (const DebugNames::NameIndex &ni: *m_debug_names_up) {
for (DebugNames::NameTableEntry nte: ni) {
if (!regex.Execute(nte.getString()))
continue;
uint64_t entry_offset = nte.getEntryOffset();
llvm::Expected<DebugNames::Entry> entry_or = ni.getEntry(&entry_offset);
for (; entry_or; entry_or = ni.getEntry(&entry_offset)) {
if (entry_or->tag() != DW_TAG_variable)
continue;
Append(*entry_or, offsets);
}
MaybeLogLookupError(entry_or.takeError(), ni, nte.getString());
}
}
}
void DebugNamesDWARFIndex::GetGlobalVariables(const DWARFUnit &cu,
DIEArray &offsets) {
m_fallback.GetGlobalVariables(cu, offsets);
uint64_t cu_offset = cu.GetOffset();
for (const DebugNames::NameIndex &ni: *m_debug_names_up) {
for (DebugNames::NameTableEntry nte: ni) {
uint64_t entry_offset = nte.getEntryOffset();
llvm::Expected<DebugNames::Entry> entry_or = ni.getEntry(&entry_offset);
for (; entry_or; entry_or = ni.getEntry(&entry_offset)) {
if (entry_or->tag() != DW_TAG_variable)
continue;
if (entry_or->getCUOffset() != cu_offset)
continue;
Append(*entry_or, offsets);
}
MaybeLogLookupError(entry_or.takeError(), ni, nte.getString());
}
}
}
void DebugNamesDWARFIndex::GetCompleteObjCClass(ConstString class_name,
bool must_be_implementation,
DIEArray &offsets) {
m_fallback.GetCompleteObjCClass(class_name, must_be_implementation, offsets);
// Keep a list of incomplete types as fallback for when we don't find the
// complete type.
DIEArray incomplete_types;
for (const DebugNames::Entry &entry :
m_debug_names_up->equal_range(class_name.GetStringRef())) {
if (entry.tag() != DW_TAG_structure_type &&
entry.tag() != DW_TAG_class_type)
continue;
llvm::Optional<DIERef> ref = ToDIERef(entry);
if (!ref)
continue;
DWARFUnit *cu = m_debug_info.GetUnit(*ref);
if (!cu || !cu->Supports_DW_AT_APPLE_objc_complete_type()) {
incomplete_types.push_back(*ref);
continue;
}
// FIXME: We should return DWARFDIEs so we don't have to resolve it twice.
DWARFDIE die = m_debug_info.GetDIE(*ref);
if (!die)
continue;
if (die.GetAttributeValueAsUnsigned(DW_AT_APPLE_objc_complete_type, 0)) {
// If we find the complete version we're done.
offsets.push_back(*ref);
return;
} else {
incomplete_types.push_back(*ref);
}
}
offsets.insert(offsets.end(), incomplete_types.begin(),
incomplete_types.end());
}
void DebugNamesDWARFIndex::GetTypes(ConstString name, DIEArray &offsets) {
m_fallback.GetTypes(name, offsets);
for (const DebugNames::Entry &entry :
m_debug_names_up->equal_range(name.GetStringRef())) {
if (isType(entry.tag()))
Append(entry, offsets);
}
}
void DebugNamesDWARFIndex::GetTypes(const DWARFDeclContext &context,
DIEArray &offsets) {
m_fallback.GetTypes(context, offsets);
for (const DebugNames::Entry &entry :
m_debug_names_up->equal_range(context[0].name)) {
if (entry.tag() == context[0].tag)
Append(entry, offsets);
}
}
void DebugNamesDWARFIndex::GetNamespaces(ConstString name, DIEArray &offsets) {
m_fallback.GetNamespaces(name, offsets);
for (const DebugNames::Entry &entry :
m_debug_names_up->equal_range(name.GetStringRef())) {
if (entry.tag() == DW_TAG_namespace)
Append(entry, offsets);
}
}
void DebugNamesDWARFIndex::GetFunctions(
ConstString name, SymbolFileDWARF &dwarf,
const CompilerDeclContext &parent_decl_ctx, uint32_t name_type_mask,
std::vector<DWARFDIE> &dies) {
std::vector<DWARFDIE> v;
m_fallback.GetFunctions(name, dwarf, parent_decl_ctx, name_type_mask, v);
for (const DebugNames::Entry &entry :
m_debug_names_up->equal_range(name.GetStringRef())) {
Tag tag = entry.tag();
if (tag != DW_TAG_subprogram && tag != DW_TAG_inlined_subroutine)
continue;
if (llvm::Optional<DIERef> ref = ToDIERef(entry))
ProcessFunctionDIE(name.GetStringRef(), *ref, dwarf, parent_decl_ctx,
name_type_mask, v);
}
std::set<DWARFDebugInfoEntry *> seen;
for (DWARFDIE die : v)
if (seen.insert(die.GetDIE()).second)
dies.push_back(die);
}
void DebugNamesDWARFIndex::GetFunctions(const RegularExpression ®ex,
DIEArray &offsets) {
m_fallback.GetFunctions(regex, offsets);
for (const DebugNames::NameIndex &ni: *m_debug_names_up) {
for (DebugNames::NameTableEntry nte: ni) {
if (!regex.Execute(nte.getString()))
continue;
uint64_t entry_offset = nte.getEntryOffset();
llvm::Expected<DebugNames::Entry> entry_or = ni.getEntry(&entry_offset);
for (; entry_or; entry_or = ni.getEntry(&entry_offset)) {
Tag tag = entry_or->tag();
if (tag != DW_TAG_subprogram && tag != DW_TAG_inlined_subroutine)
continue;
Append(*entry_or, offsets);
}
MaybeLogLookupError(entry_or.takeError(), ni, nte.getString());
}
}
}
void DebugNamesDWARFIndex::Dump(Stream &s) {
m_fallback.Dump(s);
std::string data;
llvm::raw_string_ostream os(data);
m_debug_names_up->dump(os);
s.PutCString(os.str());
}
|