d20deac32d
This fix reduces the stack size of SymbolFileDWARF::ParseType(). It seems that clang is not very good at sharing locations on the stack with local variables in large functions that have many blocks and each variable gets unique locations. The reduction in size was done by: 1 - removing some large locals that were default constructed by not used 2 - Placing some larger local variables into std::unique_ptr<> to make them on the heap 3 - removing local variables there were large and being populated but not being used 4 - reducing the size of some typedefs to llvm::SmallVector<T, N> so that N wasn’t excessively large <rdar://problem/16431645> llvm-svn: 205640
464 lines
18 KiB
C++
464 lines
18 KiB
C++
//===-- DWARFDebugInfoEntry.h -----------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SymbolFileDWARF_DWARFDebugInfoEntry_h_
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#define SymbolFileDWARF_DWARFDebugInfoEntry_h_
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#include "SymbolFileDWARF.h"
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#include "llvm/ADT/SmallVector.h"
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#include "DWARFDebugAbbrev.h"
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#include "DWARFAbbreviationDeclaration.h"
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#include "DWARFDebugRanges.h"
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#include <vector>
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#include <map>
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#include <set>
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typedef std::map<const DWARFDebugInfoEntry*, dw_addr_t> DIEToAddressMap;
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typedef DIEToAddressMap::iterator DIEToAddressMapIter;
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typedef DIEToAddressMap::const_iterator DIEToAddressMapConstIter;
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typedef std::map<dw_addr_t, const DWARFDebugInfoEntry*> AddressToDIEMap;
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typedef AddressToDIEMap::iterator AddressToDIEMapIter;
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typedef AddressToDIEMap::const_iterator AddressToDIEMapConstIter;
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typedef std::map<dw_offset_t, dw_offset_t> DIEToDIEMap;
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typedef DIEToDIEMap::iterator DIEToDIEMapIter;
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typedef DIEToDIEMap::const_iterator DIEToDIEMapConstIter;
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typedef std::map<uint32_t, const DWARFDebugInfoEntry*> UInt32ToDIEMap;
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typedef UInt32ToDIEMap::iterator UInt32ToDIEMapIter;
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typedef UInt32ToDIEMap::const_iterator UInt32ToDIEMapConstIter;
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typedef std::multimap<uint32_t, const DWARFDebugInfoEntry*> UInt32ToDIEMMap;
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typedef UInt32ToDIEMMap::iterator UInt32ToDIEMMapIter;
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typedef UInt32ToDIEMMap::const_iterator UInt32ToDIEMMapConstIter;
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class DWARFDeclContext;
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#define DIE_SIBLING_IDX_BITSIZE 31
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#define DIE_ABBR_IDX_BITSIZE 15
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class DWARFDebugInfoEntry
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{
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public:
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typedef std::vector<DWARFDebugInfoEntry> collection;
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typedef collection::iterator iterator;
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typedef collection::const_iterator const_iterator;
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typedef std::vector<dw_offset_t> offset_collection;
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typedef offset_collection::iterator offset_collection_iterator;
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typedef offset_collection::const_iterator offset_collection_const_iterator;
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class Attributes
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{
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public:
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Attributes();
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~Attributes();
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void Append(const DWARFCompileUnit *cu, dw_offset_t attr_die_offset, dw_attr_t attr, dw_form_t form);
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const DWARFCompileUnit * CompileUnitAtIndex(uint32_t i) const { return m_infos[i].cu; }
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dw_offset_t DIEOffsetAtIndex(uint32_t i) const { return m_infos[i].die_offset; }
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dw_attr_t AttributeAtIndex(uint32_t i) const { return m_infos[i].attr; }
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dw_attr_t FormAtIndex(uint32_t i) const { return m_infos[i].form; }
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bool ExtractFormValueAtIndex (SymbolFileDWARF* dwarf2Data, uint32_t i, DWARFFormValue &form_value) const;
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uint64_t FormValueAsUnsignedAtIndex (SymbolFileDWARF* dwarf2Data, uint32_t i, uint64_t fail_value) const;
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uint64_t FormValueAsUnsigned (SymbolFileDWARF* dwarf2Data, dw_attr_t attr, uint64_t fail_value) const;
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uint32_t FindAttributeIndex(dw_attr_t attr) const;
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bool ContainsAttribute(dw_attr_t attr) const;
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bool RemoveAttribute(dw_attr_t attr);
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void Clear() { m_infos.clear(); }
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size_t Size() const { return m_infos.size(); }
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protected:
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struct Info
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{
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const DWARFCompileUnit *cu; // Keep the compile unit with each attribute in case we have DW_FORM_ref_addr values
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dw_offset_t die_offset;
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dw_attr_t attr;
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dw_form_t form;
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};
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typedef llvm::SmallVector<Info, 8> collection;
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collection m_infos;
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};
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struct CompareState
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{
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CompareState() :
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die_offset_pairs()
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{
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assert(sizeof(dw_offset_t)*2 == sizeof(uint64_t));
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}
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bool AddTypePair(dw_offset_t a, dw_offset_t b)
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{
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uint64_t a_b_offsets = (uint64_t)a << 32 | (uint64_t)b;
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// Return true if this type was inserted, false otherwise
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return die_offset_pairs.insert(a_b_offsets).second;
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}
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std::set< uint64_t > die_offset_pairs;
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};
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DWARFDebugInfoEntry():
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m_offset (DW_INVALID_OFFSET),
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m_parent_idx (0),
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m_sibling_idx (0),
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m_empty_children(false),
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m_abbr_idx (0),
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m_has_children (false),
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m_tag (0)
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{
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}
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void Clear ()
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{
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m_offset = DW_INVALID_OFFSET;
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m_parent_idx = 0;
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m_sibling_idx = 0;
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m_empty_children = false;
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m_abbr_idx = 0;
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m_has_children = false;
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m_tag = 0;
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}
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bool Contains (const DWARFDebugInfoEntry *die) const;
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void BuildAddressRangeTable(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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DWARFDebugAranges* debug_aranges) const;
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void BuildFunctionAddressRangeTable(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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DWARFDebugAranges* debug_aranges) const;
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bool FastExtract(
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const lldb_private::DWARFDataExtractor& debug_info_data,
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const DWARFCompileUnit* cu,
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const uint8_t *fixed_form_sizes,
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lldb::offset_t* offset_ptr);
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bool Extract(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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lldb::offset_t* offset_ptr);
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bool LookupAddress(
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const dw_addr_t address,
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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DWARFDebugInfoEntry** function_die,
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DWARFDebugInfoEntry** block_die);
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size_t GetAttributes(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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const uint8_t *fixed_form_sizes,
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DWARFDebugInfoEntry::Attributes& attrs,
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uint32_t curr_depth = 0) const; // "curr_depth" for internal use only, don't set this yourself!!!
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dw_offset_t GetAttributeValue(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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const dw_attr_t attr,
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DWARFFormValue& formValue,
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dw_offset_t* end_attr_offset_ptr = NULL) const;
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const char* GetAttributeValueAsString(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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const dw_attr_t attr,
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const char* fail_value) const;
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uint64_t GetAttributeValueAsUnsigned(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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const dw_attr_t attr,
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uint64_t fail_value) const;
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uint64_t GetAttributeValueAsReference(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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const dw_attr_t attr,
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uint64_t fail_value) const;
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int64_t GetAttributeValueAsSigned(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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const dw_attr_t attr,
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int64_t fail_value) const;
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dw_addr_t GetAttributeHighPC(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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dw_addr_t lo_pc,
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uint64_t fail_value) const;
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bool GetAttributeAddressRange(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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dw_addr_t& lo_pc,
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dw_addr_t& hi_pc,
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uint64_t fail_value) const;
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size_t GetAttributeAddressRanges (
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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DWARFDebugRanges::RangeList &ranges,
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bool check_hi_lo_pc) const;
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dw_offset_t GetAttributeValueAsLocation(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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const dw_attr_t attr,
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lldb_private::DWARFDataExtractor& data,
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uint32_t &block_size) const;
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const char* GetName(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu) const;
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const char* GetMangledName(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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bool substitute_name_allowed = true) const;
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const char* GetPubname(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu) const;
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static bool GetName(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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const dw_offset_t die_offset,
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lldb_private::Stream &s);
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static bool AppendTypeName(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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const dw_offset_t die_offset,
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lldb_private::Stream &s);
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const char * GetQualifiedName (
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SymbolFileDWARF* dwarf2Data,
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DWARFCompileUnit* cu,
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std::string &storage) const;
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const char * GetQualifiedName (
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SymbolFileDWARF* dwarf2Data,
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DWARFCompileUnit* cu,
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const DWARFDebugInfoEntry::Attributes& attributes,
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std::string &storage) const;
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// static int Compare(
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// SymbolFileDWARF* dwarf2Data,
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// dw_offset_t a_die_offset,
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// dw_offset_t b_die_offset,
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// CompareState &compare_state,
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// bool compare_siblings,
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// bool compare_children);
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//
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// static int Compare(
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// SymbolFileDWARF* dwarf2Data,
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// DWARFCompileUnit* a_cu, const DWARFDebugInfoEntry* a_die,
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// DWARFCompileUnit* b_cu, const DWARFDebugInfoEntry* b_die,
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// CompareState &compare_state,
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// bool compare_siblings,
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// bool compare_children);
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static bool OffsetLessThan (
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const DWARFDebugInfoEntry& a,
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const DWARFDebugInfoEntry& b);
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void Dump(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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lldb_private::Stream &s,
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uint32_t recurse_depth) const;
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void DumpAncestry(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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const DWARFDebugInfoEntry* oldest,
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lldb_private::Stream &s,
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uint32_t recurse_depth) const;
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static void DumpAttribute(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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const lldb_private::DWARFDataExtractor& debug_info_data,
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lldb::offset_t *offset_ptr,
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lldb_private::Stream &s,
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dw_attr_t attr,
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dw_form_t form);
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// This one dumps the comp unit name, objfile name and die offset for this die so the stream S.
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void DumpLocation(
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SymbolFileDWARF* dwarf2Data,
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DWARFCompileUnit* cu,
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lldb_private::Stream &s) const;
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bool GetDIENamesAndRanges(
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SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit* cu,
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const char * &name,
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const char * &mangled,
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DWARFDebugRanges::RangeList& rangeList,
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int& decl_file,
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int& decl_line,
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int& decl_column,
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int& call_file,
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int& call_line,
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int& call_column,
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lldb_private::DWARFExpression *frame_base = NULL) const;
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const DWARFAbbreviationDeclaration*
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GetAbbreviationDeclarationPtr (SymbolFileDWARF* dwarf2Data,
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const DWARFCompileUnit *cu,
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lldb::offset_t &offset) const;
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dw_tag_t
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Tag () const
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{
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return m_tag;
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}
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bool
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IsNULL() const
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{
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return m_abbr_idx == 0;
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}
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dw_offset_t
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GetOffset () const
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{
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return m_offset;
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}
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void
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SetOffset (dw_offset_t offset)
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{
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m_offset = offset;
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}
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bool
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HasChildren () const
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{
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return m_has_children;
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}
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void
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SetHasChildren (bool b)
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{
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m_has_children = b;
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}
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// We know we are kept in a vector of contiguous entries, so we know
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// our parent will be some index behind "this".
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DWARFDebugInfoEntry* GetParent() { return m_parent_idx > 0 ? this - m_parent_idx : NULL; }
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const DWARFDebugInfoEntry* GetParent() const { return m_parent_idx > 0 ? this - m_parent_idx : NULL; }
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// We know we are kept in a vector of contiguous entries, so we know
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// our sibling will be some index after "this".
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DWARFDebugInfoEntry* GetSibling() { return m_sibling_idx > 0 ? this + m_sibling_idx : NULL; }
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const DWARFDebugInfoEntry* GetSibling() const { return m_sibling_idx > 0 ? this + m_sibling_idx : NULL; }
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// We know we are kept in a vector of contiguous entries, so we know
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// we don't need to store our child pointer, if we have a child it will
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// be the next entry in the list...
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DWARFDebugInfoEntry* GetFirstChild() { return (HasChildren() && !m_empty_children) ? this + 1 : NULL; }
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const DWARFDebugInfoEntry* GetFirstChild() const { return (HasChildren() && !m_empty_children) ? this + 1 : NULL; }
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void GetDeclContextDIEs (SymbolFileDWARF* dwarf2Data,
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DWARFCompileUnit* cu,
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DWARFDIECollection &decl_context_dies) const;
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void GetDWARFDeclContext (SymbolFileDWARF* dwarf2Data,
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DWARFCompileUnit* cu,
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DWARFDeclContext &dwarf_decl_ctx) const;
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bool MatchesDWARFDeclContext(SymbolFileDWARF* dwarf2Data,
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DWARFCompileUnit* cu,
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const DWARFDeclContext &dwarf_decl_ctx) const;
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const DWARFDebugInfoEntry* GetParentDeclContextDIE (SymbolFileDWARF* dwarf2Data,
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DWARFCompileUnit* cu) const;
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const DWARFDebugInfoEntry* GetParentDeclContextDIE (SymbolFileDWARF* dwarf2Data,
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DWARFCompileUnit* cu,
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const DWARFDebugInfoEntry::Attributes& attributes) const;
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void
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SetParent (DWARFDebugInfoEntry* parent)
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{
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if (parent)
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{
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// We know we are kept in a vector of contiguous entries, so we know
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// our parent will be some index behind "this".
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m_parent_idx = this - parent;
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}
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else
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m_parent_idx = 0;
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}
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void
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SetSibling (DWARFDebugInfoEntry* sibling)
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{
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if (sibling)
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{
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// We know we are kept in a vector of contiguous entries, so we know
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// our sibling will be some index after "this".
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m_sibling_idx = sibling - this;
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sibling->SetParent(GetParent());
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}
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else
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m_sibling_idx = 0;
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}
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void
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SetSiblingIndex (uint32_t idx)
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{
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m_sibling_idx = idx;
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}
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void
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SetParentIndex (uint32_t idx)
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{
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m_parent_idx = idx;
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}
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bool
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GetEmptyChildren () const
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{
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return m_empty_children;
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}
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void
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SetEmptyChildren (bool b)
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{
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m_empty_children = b;
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}
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static void
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DumpDIECollection (lldb_private::Stream &strm,
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DWARFDebugInfoEntry::collection &die_collection);
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protected:
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dw_offset_t m_offset; // Offset within the .debug_info of the start of this entry
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uint32_t m_parent_idx; // How many to subtract from "this" to get the parent. If zero this die has no parent
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uint32_t m_sibling_idx:31, // How many to add to "this" to get the sibling.
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m_empty_children:1; // If a DIE says it had children, yet it just contained a NULL tag, this will be set.
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uint32_t m_abbr_idx:DIE_ABBR_IDX_BITSIZE,
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m_has_children:1, // Set to 1 if this DIE has children
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m_tag:16; // A copy of the DW_TAG value so we don't have to go through the compile unit abbrev table
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};
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#endif // SymbolFileDWARF_DWARFDebugInfoEntry_h_
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