[Lldb-commits] [lldb] [lldb][[DWARFDeclContext] Add function to extract qualified names as vector (PR #77349)
Felipe de Azevedo Piovezan via lldb-commits
lldb-commits at lists.llvm.org
Mon Jan 8 10:15:22 PST 2024
https://github.com/felipepiovezan created https://github.com/llvm/llvm-project/pull/77349
This functionality will support the efforts to implement the IDX_Parent attribute of accelerator table entries, and it will allow us to more easily compare each of the names in a DIE parent chain hierarchy.
>From 1b444a334fdfd5c88e263e9804cffbd7574a670b Mon Sep 17 00:00:00 2001
From: Felipe de Azevedo Piovezan <fpiovezan at apple.com>
Date: Mon, 11 Dec 2023 12:42:40 -0300
Subject: [PATCH] [lldb][[DWARFDeclContext] Add function to extract qualified
names as vector
This functionality will support the efforts to implement the IDX_Parent
attribute of accelerator table entries, and it will allow us to more easily
compare each of the names in a DIE parent chain hierarchy.
---
.../SymbolFile/DWARF/DWARFDeclContext.cpp | 6 +
.../SymbolFile/DWARF/DWARFDeclContext.h | 5 +
.../SymbolFile/DWARF/DWARFDIETest.cpp | 109 ++++++++++++++++++
3 files changed, 120 insertions(+)
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/DWARFDeclContext.cpp b/lldb/source/Plugins/SymbolFile/DWARF/DWARFDeclContext.cpp
index 44421c0eda3eec..3cdb47d50bbfc0 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/DWARFDeclContext.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/DWARFDeclContext.cpp
@@ -55,6 +55,12 @@ const char *DWARFDeclContext::GetQualifiedName() const {
return m_qualified_name.c_str();
}
+llvm::SmallVector<llvm::StringRef>
+DWARFDeclContext::GetQualifiedNameAsVector() const {
+ return llvm::to_vector_of<llvm::StringRef>(
+ llvm::map_range(m_entries, GetName));
+}
+
bool DWARFDeclContext::operator==(const DWARFDeclContext &rhs) const {
if (m_entries.size() != rhs.m_entries.size())
return false;
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/DWARFDeclContext.h b/lldb/source/Plugins/SymbolFile/DWARF/DWARFDeclContext.h
index a20a862d340296..40ebb72c91d8f0 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/DWARFDeclContext.h
+++ b/lldb/source/Plugins/SymbolFile/DWARF/DWARFDeclContext.h
@@ -68,6 +68,11 @@ class DWARFDeclContext {
const char *GetQualifiedName() const;
+ /// Returns a vector of string, one string per entry in the fully qualified
+ /// name. For example, for the name `A::B::C`, this methods returns `{"A",
+ /// "B", "C"}`
+ llvm::SmallVector<llvm::StringRef> GetQualifiedNameAsVector() const;
+
// Same as GetQualifiedName, but the life time of the returned string will
// be that of the LLDB session.
ConstString GetQualifiedNameAsConstString() const {
diff --git a/lldb/unittests/SymbolFile/DWARF/DWARFDIETest.cpp b/lldb/unittests/SymbolFile/DWARF/DWARFDIETest.cpp
index 8497855b2f3db5..5672270ee31f89 100644
--- a/lldb/unittests/SymbolFile/DWARF/DWARFDIETest.cpp
+++ b/lldb/unittests/SymbolFile/DWARF/DWARFDIETest.cpp
@@ -7,8 +7,10 @@
//===----------------------------------------------------------------------===//
#include "Plugins/SymbolFile/DWARF/DWARFDIE.h"
+#include "Plugins/SymbolFile/DWARF/DWARFDeclContext.h"
#include "TestingSupport/Symbol/YAMLModuleTester.h"
#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/StringRef.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
@@ -104,3 +106,110 @@ TEST(DWARFDIETest, ChildIteration) {
DWARFDIE no_children_die(unit, die_child0);
EXPECT_TRUE(no_children_die.children().empty());
}
+
+TEST(DWARFDIETest, DeclContext) {
+ const char *yamldata = R"(
+--- !ELF
+FileHeader:
+ Class: ELFCLASS64
+ Data: ELFDATA2LSB
+ Type: ET_EXEC
+ Machine: EM_386
+DWARF:
+ debug_str:
+ - 'mynamespace'
+ - 'mystruct'
+ - 'mytype'
+ 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_structure_type
+ Children: DW_CHILDREN_yes
+ Attributes:
+ - Attribute: DW_AT_name
+ Form: DW_FORM_strp
+ - Code: 0x00000003
+ Tag: DW_TAG_base_type
+ Children: DW_CHILDREN_no
+ Attributes:
+ - Attribute: DW_AT_name
+ Form: DW_FORM_strp
+ - Code: 0x00000004
+ Tag: DW_TAG_namespace
+ Children: DW_CHILDREN_yes
+ Attributes:
+ - Attribute: DW_AT_name
+ Form: DW_FORM_strp
+ debug_info:
+ - Version: 4
+ AddrSize: 8
+ Entries:
+ - AbbrCode: 0x00000001 # compile_unit
+ Values:
+ - Value: 0x000000000000000C
+ - AbbrCode: 0x00000004 # namespace
+ Values:
+ - Value: 0x0000000000000000 # DW_ATE_strp
+ - AbbrCode: 0x00000002 # structure_type
+ Values:
+ - Value: 0x000000000000000c # DW_ATE_strp
+ - AbbrCode: 0x00000003 # base_type
+ Values:
+ - Value: 0x0000000000000015 # DW_ATE_strp
+ - AbbrCode: 0x00000000
+)";
+
+ YAMLModuleTester t(yamldata);
+ DWARFUnit *unit = t.GetDwarfUnit();
+ ASSERT_TRUE(unit != nullptr);
+ auto &ctx = unit->GetSymbolFileDWARF();
+
+ auto top_level_die = unit->DIE();
+ {
+ ASSERT_TRUE(top_level_die);
+ auto top_level_ctx = ctx.GetDWARFDeclContext(top_level_die);
+ auto top_level_name = llvm::StringRef(top_level_ctx.GetQualifiedName());
+ ASSERT_EQ(top_level_name, "");
+ }
+
+ auto namespace_die = top_level_die.GetFirstChild();
+ {
+ ASSERT_TRUE(namespace_die);
+ auto namespace_ctx = ctx.GetDWARFDeclContext(namespace_die);
+ auto namespace_name = llvm::StringRef(namespace_ctx.GetQualifiedName());
+ ASSERT_EQ(namespace_name, "::mynamespace");
+ auto namespace_names = namespace_ctx.GetQualifiedNameAsVector();
+ ASSERT_EQ(namespace_names.size(), 1u);
+ ASSERT_EQ(namespace_names.front(), "mynamespace");
+ }
+
+ auto struct_die = namespace_die.GetFirstChild();
+ {
+ ASSERT_TRUE(struct_die);
+ auto struct_ctx = ctx.GetDWARFDeclContext(struct_die);
+ auto struct_name = llvm::StringRef(struct_ctx.GetQualifiedName());
+ ASSERT_EQ(struct_name, "mynamespace::mystruct");
+ auto struct_names = struct_ctx.GetQualifiedNameAsVector();
+ ASSERT_EQ(struct_names.size(), 2u);
+ ASSERT_EQ(struct_names[0], "mystruct");
+ ASSERT_EQ(struct_names[1], "mynamespace");
+ }
+ auto simple_type_die = struct_die.GetFirstChild();
+ {
+ ASSERT_TRUE(simple_type_die);
+ auto simple_type_ctx = ctx.GetDWARFDeclContext(simple_type_die);
+ auto simple_type_name = llvm::StringRef(simple_type_ctx.GetQualifiedName());
+ ASSERT_EQ(simple_type_name, "mynamespace::mystruct::mytype");
+ auto simple_type_names = simple_type_ctx.GetQualifiedNameAsVector();
+ ASSERT_EQ(simple_type_names.size(), 3u);
+ ASSERT_EQ(simple_type_names[0], "mytype");
+ ASSERT_EQ(simple_type_names[1], "mystruct");
+ ASSERT_EQ(simple_type_names[2], "mynamespace");
+ }
+}
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