1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
//===-- DWARFIndex.cpp ----------------------------------------------------===//
//
// 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/DWARFIndex.h"
#include "DWARFDebugInfoEntry.h"
#include "DWARFDeclContext.h"
#include "Plugins/Language/ObjC/ObjCLanguage.h"
#include "Plugins/SymbolFile/DWARF/DWARFDIE.h"
#include "Plugins/SymbolFile/DWARF/SymbolFileDWARF.h"
#include "lldb/Core/Mangled.h"
#include "lldb/Core/Module.h"
#include "lldb/Target/Language.h"
using namespace lldb_private;
using namespace lldb;
using namespace lldb_private::plugin::dwarf;
DWARFIndex::~DWARFIndex() = default;
bool DWARFIndex::ProcessFunctionDIE(
const Module::LookupInfo &lookup_info, DIERef ref, SymbolFileDWARF &dwarf,
const CompilerDeclContext &parent_decl_ctx,
llvm::function_ref<bool(DWARFDIE die)> callback) {
llvm::StringRef name = lookup_info.GetLookupName().GetStringRef();
FunctionNameType name_type_mask = lookup_info.GetNameTypeMask();
DWARFDIE die = dwarf.GetDIE(ref);
if (!die) {
ReportInvalidDIERef(ref, name);
return true;
}
if (!(name_type_mask & eFunctionNameTypeFull)) {
ConstString name_to_match_against;
if (const char *mangled_die_name = die.GetMangledName()) {
name_to_match_against = ConstString(mangled_die_name);
} else {
SymbolFileDWARF *symbols = die.GetDWARF();
if (ConstString demangled_die_name =
symbols->ConstructFunctionDemangledName(die))
name_to_match_against = demangled_die_name;
}
if (!lookup_info.NameMatchesLookupInfo(name_to_match_against,
lookup_info.GetLanguageType()))
return true;
}
// Exit early if we're searching exclusively for methods or selectors and
// we have a context specified (no methods in namespaces).
uint32_t looking_for_nonmethods =
name_type_mask & ~(eFunctionNameTypeMethod | eFunctionNameTypeSelector);
if (!looking_for_nonmethods && parent_decl_ctx.IsValid())
return true;
// Otherwise, we need to also check that the context matches. If it does not
// match, we do nothing.
if (!SymbolFileDWARF::DIEInDeclContext(parent_decl_ctx, die))
return true;
// In case of a full match, we just insert everything we find.
if (name_type_mask & eFunctionNameTypeFull && die.GetMangledName() == name)
return callback(die);
// If looking for ObjC selectors, we need to also check if the name is a
// possible selector.
if (name_type_mask & eFunctionNameTypeSelector &&
ObjCLanguage::IsPossibleObjCMethodName(die.GetName()))
return callback(die);
bool looking_for_methods = name_type_mask & lldb::eFunctionNameTypeMethod;
bool looking_for_functions = name_type_mask & lldb::eFunctionNameTypeBase;
if (looking_for_methods || looking_for_functions) {
// If we're looking for either methods or functions, we definitely want this
// die. Otherwise, only keep it if the die type matches what we are
// searching for.
if ((looking_for_methods && looking_for_functions) ||
looking_for_methods == die.IsMethod())
return callback(die);
}
return true;
}
DWARFIndex::DIERefCallbackImpl::DIERefCallbackImpl(
const DWARFIndex &index, llvm::function_ref<bool(DWARFDIE die)> callback,
llvm::StringRef name)
: m_index(index),
m_dwarf(*llvm::cast<SymbolFileDWARF>(
index.m_module.GetSymbolFile()->GetBackingSymbolFile())),
m_callback(callback), m_name(name) {}
bool DWARFIndex::DIERefCallbackImpl::operator()(DIERef ref) const {
if (DWARFDIE die = m_dwarf.GetDIE(ref))
return m_callback(die);
m_index.ReportInvalidDIERef(ref, m_name);
return true;
}
bool DWARFIndex::DIERefCallbackImpl::operator()(
const llvm::AppleAcceleratorTable::Entry &entry) const {
return this->operator()(DIERef(std::nullopt, DIERef::Section::DebugInfo,
*entry.getDIESectionOffset()));
}
void DWARFIndex::ReportInvalidDIERef(DIERef ref, llvm::StringRef name) const {
m_module.ReportErrorIfModifyDetected(
"the DWARF debug information has been modified (accelerator table had "
"bad die {0:x16} for '{1}')\n",
ref.die_offset(), name.str().c_str());
}
void DWARFIndex::GetFullyQualifiedType(
const DWARFDeclContext &context,
llvm::function_ref<bool(DWARFDIE die)> callback) {
GetTypes(context, [&](DWARFDIE die) {
return GetFullyQualifiedTypeImpl(context, die, callback);
});
}
bool DWARFIndex::GetFullyQualifiedTypeImpl(
const DWARFDeclContext &context, DWARFDIE die,
llvm::function_ref<bool(DWARFDIE die)> callback) {
DWARFDeclContext dwarf_decl_ctx =
die.GetDIE()->GetDWARFDeclContext(die.GetCU());
if (dwarf_decl_ctx == context)
return callback(die);
return true;
}
|
