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//===-- DWARFDIETest.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/DWARFDIE.h"
#include "TestingSupport/Symbol/YAMLModuleTester.h"
#include "llvm/ADT/STLExtras.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
using namespace lldb;
using namespace lldb_private;
TEST(DWARFDIETest, ChildIteration) {
// Tests DWARFDIE::child_iterator.
const char *yamldata = R"(
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_EXEC
Machine: EM_386
DWARF:
debug_abbrev:
- Table:
- Code: 0x00000001
Tag: DW_TAG_compile_unit
Children: DW_CHILDREN_yes
Attributes:
- Attribute: DW_AT_language
Form: DW_FORM_data2
- Code: 0x00000002
Tag: DW_TAG_base_type
Children: DW_CHILDREN_no
Attributes:
- Attribute: DW_AT_encoding
Form: DW_FORM_data1
- Attribute: DW_AT_byte_size
Form: DW_FORM_data1
debug_info:
- Version: 4
AddrSize: 8
Entries:
- AbbrCode: 0x00000001
Values:
- Value: 0x000000000000000C
- AbbrCode: 0x00000002
Values:
- Value: 0x0000000000000007 # DW_ATE_unsigned
- Value: 0x0000000000000004
- AbbrCode: 0x00000002
Values:
- Value: 0x0000000000000007 # DW_ATE_unsigned
- Value: 0x0000000000000008
- AbbrCode: 0x00000002
Values:
- Value: 0x0000000000000005 # DW_ATE_signed
- Value: 0x0000000000000008
- AbbrCode: 0x00000000
)";
YAMLModuleTester t(yamldata);
ASSERT_TRUE((bool)t.GetDwarfUnit());
DWARFUnit *unit = t.GetDwarfUnit();
const DWARFDebugInfoEntry *die_first = unit->DIE().GetDIE();
// Create a DWARFDIE that has three DW_TAG_base_type children.
DWARFDIE top_die(unit, die_first);
// Create the iterator range that has the three tags as elements.
llvm::iterator_range<DWARFDIE::child_iterator> children = top_die.children();
// Compare begin() to the first child DIE.
DWARFDIE::child_iterator child_iter = children.begin();
ASSERT_NE(child_iter, children.end());
const DWARFDebugInfoEntry *die_child0 = die_first->GetFirstChild();
EXPECT_EQ((*child_iter).GetDIE(), die_child0);
// Step to the second child DIE.
++child_iter;
ASSERT_NE(child_iter, children.end());
const DWARFDebugInfoEntry *die_child1 = die_child0->GetSibling();
EXPECT_EQ((*child_iter).GetDIE(), die_child1);
// Step to the third child DIE.
++child_iter;
ASSERT_NE(child_iter, children.end());
const DWARFDebugInfoEntry *die_child2 = die_child1->GetSibling();
EXPECT_EQ((*child_iter).GetDIE(), die_child2);
// Step to the end of the range.
++child_iter;
EXPECT_EQ(child_iter, children.end());
// Take one of the DW_TAG_base_type DIEs (which has no children) and make
// sure the children range is now empty.
DWARFDIE no_children_die(unit, die_child0);
EXPECT_TRUE(no_children_die.children().empty());
}
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