| 1 | //===-- UniqueDWARFASTType.cpp --------------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #include "UniqueDWARFASTType.h" |
| 10 | |
| 11 | #include "lldb/Core/Declaration.h" |
| 12 | |
| 13 | using namespace lldb_private::dwarf; |
| 14 | using namespace lldb_private::plugin::dwarf; |
| 15 | |
| 16 | bool UniqueDWARFASTTypeList::Find(const DWARFDIE &die, |
| 17 | const lldb_private::Declaration &decl, |
| 18 | const int32_t byte_size, |
| 19 | UniqueDWARFASTType &entry) const { |
| 20 | for (const UniqueDWARFASTType &udt : m_collection) { |
| 21 | // Make sure the tags match |
| 22 | if (udt.m_die.Tag() == die.Tag()) { |
| 23 | // Validate byte sizes of both types only if both are valid. |
| 24 | if (udt.m_byte_size < 0 || byte_size < 0 || |
| 25 | udt.m_byte_size == byte_size) { |
| 26 | // Make sure the file and line match |
| 27 | if (udt.m_declaration == decl) { |
| 28 | // The type has the same name, and was defined on the same file and |
| 29 | // line. Now verify all of the parent DIEs match. |
| 30 | DWARFDIE parent_arg_die = die.GetParent(); |
| 31 | DWARFDIE parent_pos_die = udt.m_die.GetParent(); |
| 32 | bool match = true; |
| 33 | bool done = false; |
| 34 | while (!done && match && parent_arg_die && parent_pos_die) { |
| 35 | const dw_tag_t parent_arg_tag = parent_arg_die.Tag(); |
| 36 | const dw_tag_t parent_pos_tag = parent_pos_die.Tag(); |
| 37 | if (parent_arg_tag == parent_pos_tag) { |
| 38 | switch (parent_arg_tag) { |
| 39 | case DW_TAG_class_type: |
| 40 | case DW_TAG_structure_type: |
| 41 | case DW_TAG_union_type: |
| 42 | case DW_TAG_namespace: { |
| 43 | const char *parent_arg_die_name = parent_arg_die.GetName(); |
| 44 | if (parent_arg_die_name == |
| 45 | nullptr) // Anonymous (i.e. no-name) struct |
| 46 | { |
| 47 | match = false; |
| 48 | } else { |
| 49 | const char *parent_pos_die_name = parent_pos_die.GetName(); |
| 50 | if (parent_pos_die_name == nullptr || |
| 51 | ((parent_arg_die_name != parent_pos_die_name) && |
| 52 | strcmp(s1: parent_arg_die_name, s2: parent_pos_die_name))) |
| 53 | match = false; |
| 54 | } |
| 55 | } break; |
| 56 | |
| 57 | case DW_TAG_compile_unit: |
| 58 | case DW_TAG_partial_unit: |
| 59 | done = true; |
| 60 | break; |
| 61 | default: |
| 62 | break; |
| 63 | } |
| 64 | } |
| 65 | parent_arg_die = parent_arg_die.GetParent(); |
| 66 | parent_pos_die = parent_pos_die.GetParent(); |
| 67 | } |
| 68 | |
| 69 | if (match) { |
| 70 | entry = udt; |
| 71 | return true; |
| 72 | } |
| 73 | } |
| 74 | } |
| 75 | } |
| 76 | } |
| 77 | return false; |
| 78 | } |
| 79 |