2f869fe9d2
1 - DWARF in .o files with debug map in executable: we would place the compile unit index in the upper 32 bits of the 64 bit value and the lower 32 bits would be the DIE offset 2 - DWO: we would place the compile unit offset in the upper 32 bits of the 64 bit value and the lower 32 bits would be the DIE offset There was a mixing and matching of this and it wasn't done consistently. Major changes include: The DIERef constructor that takes a lldb::user_id_t now requires a SymbolFileDWARF: DIERef(lldb::user_id_t uid, SymbolFileDWARF *dwarf) It is needed so that it can be decoded correctly. If it is DWARF in .o files with debug map in executable, then we get the right compile unit from the SymbolFileDWARFDebugMap, otherwise, we use the compile unit offset and DIE offset for DWO or normal DWARF. The function: lldb::user_id_t DIERef::GetUID() const; Now becomes lldb::user_id_t DIERef::GetUID(SymbolFileDWARF *dwarf) const; Again, we need the DWARF file to encode it correctly. This removes the need for "lldb::user_id_t SymbolFileDWARF::MakeUserID() const" and for bool SymbolFileDWARF::UserIDMatches (lldb::user_id_t uid) const". There were also many places were doing things inneficiently like: 1 - encode a dw_offset_t into a lldb::user_id_t 2 - call the public SymbolFile interface to resolve types using the lldb::user_id_t 3 - This would then decode the lldb::user_id_t into a DIERef, and then try to find that type. There are many places that are now doing this more efficiently by storing DW_AT_type form values as DWARFFormValue objects and then making a DIERef from them and directly calling the underlying function to resolve the lldb_private::Type, lldb_private::CompilerType, lldb_private::CompilerDecl, lldb_private::CompilerDeclContext. If there are any regressions in DWARF with DWO, we will need to fix any issues that arise since the original patch wasn't functional for the much more widely used DWARF in .o files with debug map. <rdar://problem/25200976> llvm-svn: 264909
557 lines
20 KiB
C++
557 lines
20 KiB
C++
//===-- DWARFASTParserJava.cpp ----------------------------------*- 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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#include "DWARFASTParserJava.h"
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#include "DWARFAttribute.h"
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#include "DWARFCompileUnit.h"
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#include "DWARFDebugInfoEntry.h"
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#include "DWARFDebugInfoEntry.h"
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#include "DWARFDeclContext.h"
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#include "SymbolFileDWARF.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Symbol/CompileUnit.h"
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#include "lldb/Symbol/SymbolContextScope.h"
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#include "lldb/Symbol/TypeList.h"
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using namespace lldb;
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using namespace lldb_private;
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DWARFASTParserJava::DWARFASTParserJava(JavaASTContext &ast) : m_ast(ast)
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{
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}
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DWARFASTParserJava::~DWARFASTParserJava()
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{
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}
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TypeSP
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DWARFASTParserJava::ParseBaseTypeFromDIE(const DWARFDIE &die)
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{
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SymbolFileDWARF *dwarf = die.GetDWARF();
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dwarf->m_die_to_type[die.GetDIE()] = DIE_IS_BEING_PARSED;
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ConstString type_name;
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uint64_t byte_size = 0;
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DWARFAttributes attributes;
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const size_t num_attributes = die.GetAttributes(attributes);
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for (uint32_t i = 0; i < num_attributes; ++i)
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{
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DWARFFormValue form_value;
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dw_attr_t attr = attributes.AttributeAtIndex(i);
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if (attributes.ExtractFormValueAtIndex(i, form_value))
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{
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switch (attr)
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{
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case DW_AT_name:
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type_name.SetCString(form_value.AsCString());
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break;
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case DW_AT_byte_size:
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byte_size = form_value.Unsigned();
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break;
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case DW_AT_encoding:
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break;
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default:
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assert(false && "Unsupported attribute for DW_TAG_base_type");
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}
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}
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}
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Declaration decl;
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CompilerType compiler_type = m_ast.CreateBaseType(type_name);
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return std::make_shared<Type>(die.GetID(), dwarf, type_name, byte_size, nullptr, LLDB_INVALID_UID,
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Type::eEncodingIsUID, decl, compiler_type, Type::eResolveStateFull);
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}
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TypeSP
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DWARFASTParserJava::ParseArrayTypeFromDIE(const DWARFDIE &die)
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{
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SymbolFileDWARF *dwarf = die.GetDWARF();
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dwarf->m_die_to_type[die.GetDIE()] = DIE_IS_BEING_PARSED;
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ConstString linkage_name;
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DWARFFormValue type_attr_value;
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lldb::addr_t data_offset = LLDB_INVALID_ADDRESS;
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DWARFExpression length_expression(die.GetCU());
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DWARFAttributes attributes;
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const size_t num_attributes = die.GetAttributes(attributes);
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for (uint32_t i = 0; i < num_attributes; ++i)
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{
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DWARFFormValue form_value;
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dw_attr_t attr = attributes.AttributeAtIndex(i);
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if (attributes.ExtractFormValueAtIndex(i, form_value))
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{
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switch (attr)
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{
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case DW_AT_linkage_name:
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linkage_name.SetCString(form_value.AsCString());
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break;
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case DW_AT_type:
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type_attr_value = form_value;
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break;
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case DW_AT_data_member_location:
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data_offset = form_value.Unsigned();
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break;
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case DW_AT_declaration:
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break;
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default:
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assert(false && "Unsupported attribute for DW_TAG_array_type");
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}
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}
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}
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for (DWARFDIE child_die = die.GetFirstChild(); child_die.IsValid(); child_die = child_die.GetSibling())
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{
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if (child_die.Tag() == DW_TAG_subrange_type)
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{
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DWARFAttributes attributes;
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const size_t num_attributes = child_die.GetAttributes(attributes);
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for (uint32_t i = 0; i < num_attributes; ++i)
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{
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DWARFFormValue form_value;
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dw_attr_t attr = attributes.AttributeAtIndex(i);
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if (attributes.ExtractFormValueAtIndex(i, form_value))
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{
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switch (attr)
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{
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case DW_AT_count:
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if (form_value.BlockData())
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length_expression.CopyOpcodeData(form_value.BlockData(), form_value.Unsigned(),
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child_die.GetCU()->GetByteOrder(),
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child_die.GetCU()->GetAddressByteSize());
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break;
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default:
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assert(false && "Unsupported attribute for DW_TAG_subrange_type");
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}
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}
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}
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}
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else
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{
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assert(false && "Unsupported child for DW_TAG_array_type");
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}
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}
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DIERef type_die_ref(type_attr_value);
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Type *element_type = dwarf->ResolveTypeUID(type_die_ref);
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if (!element_type)
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return nullptr;
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CompilerType element_compiler_type = element_type->GetForwardCompilerType();
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CompilerType array_compiler_type =
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m_ast.CreateArrayType(element_compiler_type, length_expression, data_offset);
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Declaration decl;
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TypeSP type_sp(new Type(die.GetID(), dwarf, array_compiler_type.GetTypeName(), -1, nullptr,
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type_die_ref.GetUID(dwarf), Type::eEncodingIsUID, &decl,
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array_compiler_type, Type::eResolveStateFull));
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type_sp->SetEncodingType(element_type);
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return type_sp;
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}
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TypeSP
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DWARFASTParserJava::ParseReferenceTypeFromDIE(const DWARFDIE &die)
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{
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SymbolFileDWARF *dwarf = die.GetDWARF();
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dwarf->m_die_to_type[die.GetDIE()] = DIE_IS_BEING_PARSED;
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Declaration decl;
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DWARFFormValue type_attr_value;
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DWARFAttributes attributes;
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const size_t num_attributes = die.GetAttributes(attributes);
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for (uint32_t i = 0; i < num_attributes; ++i)
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{
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DWARFFormValue form_value;
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dw_attr_t attr = attributes.AttributeAtIndex(i);
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if (attributes.ExtractFormValueAtIndex(i, form_value))
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{
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switch (attr)
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{
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case DW_AT_type:
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type_attr_value = form_value;
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break;
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default:
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assert(false && "Unsupported attribute for DW_TAG_array_type");
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}
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}
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}
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DIERef type_die_ref(type_attr_value);
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Type *pointee_type = dwarf->ResolveTypeUID(type_die_ref);
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if (!pointee_type)
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return nullptr;
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CompilerType pointee_compiler_type = pointee_type->GetForwardCompilerType();
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CompilerType reference_compiler_type = m_ast.CreateReferenceType(pointee_compiler_type);
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TypeSP type_sp(new Type(die.GetID(), dwarf, reference_compiler_type.GetTypeName(), -1, nullptr,
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type_die_ref.GetUID(dwarf), Type::eEncodingIsUID, &decl,
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reference_compiler_type, Type::eResolveStateFull));
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type_sp->SetEncodingType(pointee_type);
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return type_sp;
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}
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lldb::TypeSP
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DWARFASTParserJava::ParseClassTypeFromDIE(const DWARFDIE &die, bool &is_new_type)
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{
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SymbolFileDWARF *dwarf = die.GetDWARF();
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dwarf->m_die_to_type[die.GetDIE()] = DIE_IS_BEING_PARSED;
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Declaration decl;
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ConstString name;
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ConstString linkage_name;
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bool is_forward_declaration = false;
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uint32_t byte_size = 0;
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DWARFAttributes attributes;
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const size_t num_attributes = die.GetAttributes(attributes);
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for (uint32_t i = 0; i < num_attributes; ++i)
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{
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DWARFFormValue form_value;
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dw_attr_t attr = attributes.AttributeAtIndex(i);
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if (attributes.ExtractFormValueAtIndex(i, form_value))
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{
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switch (attr)
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{
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case DW_AT_name:
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name.SetCString(form_value.AsCString());
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break;
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case DW_AT_declaration:
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is_forward_declaration = form_value.Boolean();
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break;
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case DW_AT_byte_size:
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byte_size = form_value.Unsigned();
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break;
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case DW_AT_linkage_name:
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linkage_name.SetCString(form_value.AsCString());
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break;
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default:
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assert(false && "Unsupported attribute for DW_TAG_class_type");
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}
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}
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}
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UniqueDWARFASTType unique_ast_entry;
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if (name)
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{
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std::string qualified_name;
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if (die.GetQualifiedName(qualified_name))
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{
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name.SetCString(qualified_name.c_str());
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if (dwarf->GetUniqueDWARFASTTypeMap().Find(name, die, Declaration(), -1, unique_ast_entry))
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{
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if (unique_ast_entry.m_type_sp)
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{
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dwarf->GetDIEToType()[die.GetDIE()] = unique_ast_entry.m_type_sp.get();
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is_new_type = false;
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return unique_ast_entry.m_type_sp;
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}
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}
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}
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}
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if (is_forward_declaration)
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{
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DWARFDeclContext die_decl_ctx;
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die.GetDWARFDeclContext(die_decl_ctx);
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TypeSP type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die_decl_ctx);
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if (type_sp)
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{
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// We found a real definition for this type elsewhere so lets use it
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dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
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is_new_type = false;
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return type_sp;
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}
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}
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CompilerType compiler_type(&m_ast, dwarf->GetForwardDeclDieToClangType().lookup(die.GetDIE()));
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if (!compiler_type)
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compiler_type = m_ast.CreateObjectType(name, linkage_name, byte_size);
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is_new_type = true;
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TypeSP type_sp(new Type(die.GetID(), dwarf, name,
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-1, // byte size isn't specified
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nullptr, LLDB_INVALID_UID, Type::eEncodingIsUID, &decl, compiler_type,
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Type::eResolveStateForward));
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// Add our type to the unique type map
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unique_ast_entry.m_type_sp = type_sp;
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unique_ast_entry.m_die = die;
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unique_ast_entry.m_declaration = decl;
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unique_ast_entry.m_byte_size = -1;
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dwarf->GetUniqueDWARFASTTypeMap().Insert(name, unique_ast_entry);
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if (!is_forward_declaration)
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{
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// Leave this as a forward declaration until we need to know the details of the type
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dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] = compiler_type.GetOpaqueQualType();
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dwarf->GetForwardDeclClangTypeToDie()[compiler_type.GetOpaqueQualType()] = die.GetDIERef();
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}
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return type_sp;
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}
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lldb::TypeSP
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DWARFASTParserJava::ParseTypeFromDWARF(const lldb_private::SymbolContext &sc, const DWARFDIE &die,
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lldb_private::Log *log, bool *type_is_new_ptr)
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{
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if (type_is_new_ptr)
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*type_is_new_ptr = false;
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if (!die)
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return nullptr;
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SymbolFileDWARF *dwarf = die.GetDWARF();
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Type *type_ptr = dwarf->m_die_to_type.lookup(die.GetDIE());
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if (type_ptr == DIE_IS_BEING_PARSED)
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return nullptr;
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if (type_ptr != nullptr)
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return type_ptr->shared_from_this();
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TypeSP type_sp;
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if (type_is_new_ptr)
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*type_is_new_ptr = true;
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switch (die.Tag())
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{
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case DW_TAG_base_type:
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{
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type_sp = ParseBaseTypeFromDIE(die);
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break;
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}
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case DW_TAG_array_type:
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{
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type_sp = ParseArrayTypeFromDIE(die);
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break;
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}
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case DW_TAG_class_type:
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{
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bool is_new_type = false;
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type_sp = ParseClassTypeFromDIE(die, is_new_type);
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if (!is_new_type)
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return type_sp;
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break;
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}
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case DW_TAG_reference_type:
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{
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type_sp = ParseReferenceTypeFromDIE(die);
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break;
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}
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}
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if (!type_sp)
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return nullptr;
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DWARFDIE sc_parent_die = SymbolFileDWARF::GetParentSymbolContextDIE(die);
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dw_tag_t sc_parent_tag = sc_parent_die.Tag();
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SymbolContextScope *symbol_context_scope = nullptr;
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if (sc_parent_tag == DW_TAG_compile_unit)
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{
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symbol_context_scope = sc.comp_unit;
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}
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else if (sc.function != nullptr && sc_parent_die)
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{
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symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(sc_parent_die.GetID());
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if (symbol_context_scope == nullptr)
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symbol_context_scope = sc.function;
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}
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if (symbol_context_scope != nullptr)
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type_sp->SetSymbolContextScope(symbol_context_scope);
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dwarf->GetTypeList()->Insert(type_sp);
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dwarf->m_die_to_type[die.GetDIE()] = type_sp.get();
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return type_sp;
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}
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lldb_private::Function *
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DWARFASTParserJava::ParseFunctionFromDWARF(const lldb_private::SymbolContext &sc, const DWARFDIE &die)
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{
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assert(die.Tag() == DW_TAG_subprogram);
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const char *name = nullptr;
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const char *mangled = nullptr;
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int decl_file = 0;
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int decl_line = 0;
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int decl_column = 0;
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int call_file = 0;
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int call_line = 0;
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int call_column = 0;
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DWARFRangeList func_ranges;
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DWARFExpression frame_base(die.GetCU());
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if (die.GetDIENamesAndRanges(name, mangled, func_ranges, decl_file, decl_line, decl_column, call_file, call_line,
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call_column, &frame_base))
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{
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// Union of all ranges in the function DIE (if the function is discontiguous)
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AddressRange func_range;
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lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase(0);
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lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd(0);
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if (lowest_func_addr != LLDB_INVALID_ADDRESS && lowest_func_addr <= highest_func_addr)
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{
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ModuleSP module_sp(die.GetModule());
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func_range.GetBaseAddress().ResolveAddressUsingFileSections(lowest_func_addr, module_sp->GetSectionList());
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if (func_range.GetBaseAddress().IsValid())
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func_range.SetByteSize(highest_func_addr - lowest_func_addr);
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}
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if (func_range.GetBaseAddress().IsValid())
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{
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std::unique_ptr<Declaration> decl_ap;
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if (decl_file != 0 || decl_line != 0 || decl_column != 0)
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decl_ap.reset(new Declaration(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file), decl_line,
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decl_column));
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if (die.GetDWARF()->FixupAddress(func_range.GetBaseAddress()))
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{
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FunctionSP func_sp(new Function(sc.comp_unit, die.GetID(), die.GetID(),
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Mangled(ConstString(name), false),
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nullptr, // No function types in java
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func_range));
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if (frame_base.IsValid())
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func_sp->GetFrameBaseExpression() = frame_base;
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sc.comp_unit->AddFunction(func_sp);
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return func_sp.get();
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}
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}
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}
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return nullptr;
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}
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bool
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DWARFASTParserJava::CompleteTypeFromDWARF(const DWARFDIE &die, lldb_private::Type *type,
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lldb_private::CompilerType &java_type)
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{
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switch (die.Tag())
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{
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case DW_TAG_class_type:
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{
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if (die.GetAttributeValueAsUnsigned(DW_AT_declaration, 0) == 0)
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{
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if (die.HasChildren())
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ParseChildMembers(die, java_type);
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m_ast.CompleteObjectType(java_type);
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return java_type.IsValid();
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}
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}
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break;
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default:
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assert(false && "Not a forward java type declaration!");
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break;
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}
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return false;
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}
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void
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DWARFASTParserJava::ParseChildMembers(const DWARFDIE &parent_die, CompilerType &compiler_type)
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{
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DWARFCompileUnit *dwarf_cu = parent_die.GetCU();
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for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling())
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{
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|
switch (die.Tag())
|
|
{
|
|
case DW_TAG_member:
|
|
{
|
|
const char *name = nullptr;
|
|
DWARFFormValue encoding_uid;
|
|
uint32_t member_byte_offset = UINT32_MAX;
|
|
DWARFExpression member_location_expression(dwarf_cu);
|
|
bool artificial = true;
|
|
|
|
DWARFAttributes attributes;
|
|
size_t num_attributes = die.GetAttributes(attributes);
|
|
for (size_t i = 0; i < num_attributes; ++i)
|
|
{
|
|
DWARFFormValue form_value;
|
|
if (attributes.ExtractFormValueAtIndex(i, form_value))
|
|
{
|
|
switch (attributes.AttributeAtIndex(i))
|
|
{
|
|
case DW_AT_name:
|
|
name = form_value.AsCString();
|
|
break;
|
|
case DW_AT_type:
|
|
encoding_uid = form_value;
|
|
break;
|
|
case DW_AT_data_member_location:
|
|
if (form_value.BlockData())
|
|
member_location_expression.CopyOpcodeData(
|
|
form_value.BlockData(), form_value.Unsigned(), dwarf_cu->GetByteOrder(),
|
|
dwarf_cu->GetAddressByteSize());
|
|
else
|
|
member_byte_offset = form_value.Unsigned();
|
|
break;
|
|
case DW_AT_artificial:
|
|
artificial = form_value.Boolean();
|
|
break;
|
|
case DW_AT_accessibility:
|
|
// TODO: Handle when needed
|
|
break;
|
|
default:
|
|
assert(false && "Unhandled attribute for DW_TAG_member");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (strcmp(name, ".dynamic_type") == 0)
|
|
m_ast.SetDynamicTypeId(compiler_type, member_location_expression);
|
|
else
|
|
{
|
|
if (Type *member_type = die.ResolveTypeUID(DIERef(encoding_uid)))
|
|
m_ast.AddMemberToObject(compiler_type, ConstString(name), member_type->GetFullCompilerType(),
|
|
member_byte_offset);
|
|
}
|
|
break;
|
|
}
|
|
case DW_TAG_inheritance:
|
|
{
|
|
DWARFFormValue encoding_uid;
|
|
uint32_t member_byte_offset = UINT32_MAX;
|
|
|
|
DWARFAttributes attributes;
|
|
size_t num_attributes = die.GetAttributes(attributes);
|
|
for (size_t i = 0; i < num_attributes; ++i)
|
|
{
|
|
DWARFFormValue form_value;
|
|
if (attributes.ExtractFormValueAtIndex(i, form_value))
|
|
{
|
|
switch (attributes.AttributeAtIndex(i))
|
|
{
|
|
case DW_AT_type:
|
|
encoding_uid = form_value;
|
|
break;
|
|
case DW_AT_data_member_location:
|
|
member_byte_offset = form_value.Unsigned();
|
|
break;
|
|
case DW_AT_accessibility:
|
|
// In java all base class is public so we can ignore this attribute
|
|
break;
|
|
default:
|
|
assert(false && "Unhandled attribute for DW_TAG_member");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (Type *base_type = die.ResolveTypeUID(DIERef(encoding_uid)))
|
|
m_ast.AddBaseClassToObject(compiler_type, base_type->GetFullCompilerType(), member_byte_offset);
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|