blob: dbece346b99a77fe5b3e7678af48411ab26af30c (
plain)
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
|
//===-- DWARFASTParser.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 "DWARFASTParser.h"
#include "DWARFAttribute.h"
#include "DWARFDIE.h"
#include "lldb/Core/ValueObject.h"
#include "lldb/Symbol/SymbolFile.h"
#include "lldb/Target/StackFrame.h"
#include <optional>
using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::dwarf;
std::optional<SymbolFile::ArrayInfo>
DWARFASTParser::ParseChildArrayInfo(const DWARFDIE &parent_die,
const ExecutionContext *exe_ctx) {
SymbolFile::ArrayInfo array_info;
if (!parent_die)
return std::nullopt;
for (DWARFDIE die : parent_die.children()) {
const dw_tag_t tag = die.Tag();
if (tag != DW_TAG_subrange_type)
continue;
DWARFAttributes attributes;
const size_t num_child_attributes = die.GetAttributes(attributes);
if (num_child_attributes > 0) {
uint64_t num_elements = 0;
uint64_t lower_bound = 0;
uint64_t upper_bound = 0;
bool upper_bound_valid = false;
uint32_t i;
for (i = 0; i < num_child_attributes; ++i) {
const dw_attr_t attr = attributes.AttributeAtIndex(i);
DWARFFormValue form_value;
if (attributes.ExtractFormValueAtIndex(i, form_value)) {
switch (attr) {
case DW_AT_name:
break;
case DW_AT_count:
if (DWARFDIE var_die = die.GetReferencedDIE(DW_AT_count)) {
if (var_die.Tag() == DW_TAG_variable)
if (exe_ctx) {
if (auto frame = exe_ctx->GetFrameSP()) {
Status error;
lldb::VariableSP var_sp;
auto valobj_sp = frame->GetValueForVariableExpressionPath(
var_die.GetName(), eNoDynamicValues, 0, var_sp, error);
if (valobj_sp) {
num_elements = valobj_sp->GetValueAsUnsigned(0);
break;
}
}
}
} else
num_elements = form_value.Unsigned();
break;
case DW_AT_bit_stride:
array_info.bit_stride = form_value.Unsigned();
break;
case DW_AT_byte_stride:
array_info.byte_stride = form_value.Unsigned();
break;
case DW_AT_lower_bound:
lower_bound = form_value.Unsigned();
break;
case DW_AT_upper_bound:
upper_bound_valid = true;
upper_bound = form_value.Unsigned();
break;
default:
break;
}
}
}
if (num_elements == 0) {
if (upper_bound_valid && upper_bound >= lower_bound)
num_elements = upper_bound - lower_bound + 1;
}
array_info.element_orders.push_back(num_elements);
}
}
return array_info;
}
AccessType
DWARFASTParser::GetAccessTypeFromDWARF(uint32_t dwarf_accessibility) {
switch (dwarf_accessibility) {
case DW_ACCESS_public:
return eAccessPublic;
case DW_ACCESS_private:
return eAccessPrivate;
case DW_ACCESS_protected:
return eAccessProtected;
default:
break;
}
return eAccessNone;
}
|
