106 lines
3.5 KiB
C++
106 lines
3.5 KiB
C++
//===-- DWARFDIETest.cpp ----------------------------------------------=---===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "Plugins/SymbolFile/DWARF/DWARFDIE.h"
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#include "TestingSupport/Symbol/YAMLModuleTester.h"
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#include "llvm/ADT/STLExtras.h"
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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using namespace lldb;
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using namespace lldb_private;
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TEST(DWARFDIETest, ChildIteration) {
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// Tests DWARFDIE::child_iterator.
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const char *yamldata = R"(
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--- !ELF
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FileHeader:
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Class: ELFCLASS64
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Data: ELFDATA2LSB
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Type: ET_EXEC
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Machine: EM_386
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DWARF:
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debug_abbrev:
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- Table:
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- Code: 0x00000001
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Tag: DW_TAG_compile_unit
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Children: DW_CHILDREN_yes
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Attributes:
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- Attribute: DW_AT_language
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Form: DW_FORM_data2
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- Code: 0x00000002
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Tag: DW_TAG_base_type
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Children: DW_CHILDREN_no
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Attributes:
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- Attribute: DW_AT_encoding
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Form: DW_FORM_data1
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- Attribute: DW_AT_byte_size
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Form: DW_FORM_data1
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debug_info:
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- Version: 4
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AddrSize: 8
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Entries:
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- AbbrCode: 0x00000001
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Values:
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- Value: 0x000000000000000C
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- AbbrCode: 0x00000002
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Values:
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- Value: 0x0000000000000007 # DW_ATE_unsigned
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- Value: 0x0000000000000004
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- AbbrCode: 0x00000002
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Values:
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- Value: 0x0000000000000007 # DW_ATE_unsigned
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- Value: 0x0000000000000008
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- AbbrCode: 0x00000002
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Values:
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- Value: 0x0000000000000005 # DW_ATE_signed
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- Value: 0x0000000000000008
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- AbbrCode: 0x00000000
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)";
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YAMLModuleTester t(yamldata);
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ASSERT_TRUE((bool)t.GetDwarfUnit());
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DWARFUnit *unit = t.GetDwarfUnit();
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const DWARFDebugInfoEntry *die_first = unit->DIE().GetDIE();
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// Create a DWARFDIE that has three DW_TAG_base_type children.
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DWARFDIE top_die(unit, die_first);
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// Create the iterator range that has the three tags as elements.
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llvm::iterator_range<DWARFDIE::child_iterator> children = top_die.children();
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// Compare begin() to the first child DIE.
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DWARFDIE::child_iterator child_iter = children.begin();
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ASSERT_NE(child_iter, children.end());
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const DWARFDebugInfoEntry *die_child0 = die_first->GetFirstChild();
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EXPECT_EQ((*child_iter).GetDIE(), die_child0);
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// Step to the second child DIE.
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++child_iter;
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ASSERT_NE(child_iter, children.end());
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const DWARFDebugInfoEntry *die_child1 = die_child0->GetSibling();
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EXPECT_EQ((*child_iter).GetDIE(), die_child1);
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// Step to the third child DIE.
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++child_iter;
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ASSERT_NE(child_iter, children.end());
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const DWARFDebugInfoEntry *die_child2 = die_child1->GetSibling();
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EXPECT_EQ((*child_iter).GetDIE(), die_child2);
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// Step to the end of the range.
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++child_iter;
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EXPECT_EQ(child_iter, children.end());
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// Take one of the DW_TAG_base_type DIEs (which has no children) and make
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// sure the children range is now empty.
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DWARFDIE no_children_die(unit, die_child0);
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EXPECT_TRUE(no_children_die.children().empty());
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}
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