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-rw-r--r--lldb/unittests/SymbolFile/DWARF/DWARFASTParserClangTests.cpp302
1 files changed, 302 insertions, 0 deletions
diff --git a/lldb/unittests/SymbolFile/DWARF/DWARFASTParserClangTests.cpp b/lldb/unittests/SymbolFile/DWARF/DWARFASTParserClangTests.cpp
index 1abce69..cef3a25a 100644
--- a/lldb/unittests/SymbolFile/DWARF/DWARFASTParserClangTests.cpp
+++ b/lldb/unittests/SymbolFile/DWARF/DWARFASTParserClangTests.cpp
@@ -1651,3 +1651,305 @@ DWARF:
EXPECT_EQ(param_die, ast_parser.GetObjectParameter(sub2, context_die));
}
}
+
+TEST_F(DWARFASTParserClangTests, TestTypeBitSize) {
+ // Tests that we correctly parse DW_AT_bit_size of a DW_AT_base_type.
+
+ const char *yamldata = R"(
+--- !ELF
+FileHeader:
+ Class: ELFCLASS64
+ Data: ELFDATA2LSB
+ Type: ET_EXEC
+ Machine: EM_AARCH64
+DWARF:
+ debug_str:
+ - _BitInt(2)
+ debug_abbrev:
+ - ID: 0
+ Table:
+ - Code: 0x1
+ Tag: DW_TAG_compile_unit
+ Children: DW_CHILDREN_yes
+ Attributes:
+ - Attribute: DW_AT_language
+ Form: DW_FORM_data2
+ - Code: 0x2
+ Tag: DW_TAG_base_type
+ Children: DW_CHILDREN_no
+ Attributes:
+ - Attribute: DW_AT_name
+ Form: DW_FORM_strp
+ - Attribute: DW_AT_encoding
+ Form: DW_FORM_data1
+ - Attribute: DW_AT_byte_size
+ Form: DW_FORM_data1
+ - Attribute: DW_AT_bit_size
+ Form: DW_FORM_data1
+
+ debug_info:
+ - Version: 5
+ UnitType: DW_UT_compile
+ AddrSize: 8
+ Entries:
+
+# DW_TAG_compile_unit
+# DW_AT_language [DW_FORM_data2] (DW_LANG_C_plus_plus)
+
+ - AbbrCode: 0x1
+ Values:
+ - Value: 0x04
+
+# DW_TAG_base_type
+# DW_AT_name [DW_FORM_strp] ('_BitInt(2)')
+
+ - AbbrCode: 0x2
+ Values:
+ - Value: 0x0
+ - Value: 0x05
+ - Value: 0x01
+ - Value: 0x02
+...
+)";
+
+ YAMLModuleTester t(yamldata);
+
+ DWARFUnit *unit = t.GetDwarfUnit();
+ ASSERT_NE(unit, nullptr);
+ const DWARFDebugInfoEntry *cu_entry = unit->DIE().GetDIE();
+ ASSERT_EQ(cu_entry->Tag(), DW_TAG_compile_unit);
+ ASSERT_EQ(unit->GetDWARFLanguageType(), DW_LANG_C_plus_plus);
+ DWARFDIE cu_die(unit, cu_entry);
+
+ auto holder = std::make_unique<clang_utils::TypeSystemClangHolder>("ast");
+ auto &ast_ctx = *holder->GetAST();
+ DWARFASTParserClangStub ast_parser(ast_ctx);
+
+ auto type_die = cu_die.GetFirstChild();
+ ASSERT_TRUE(type_die.IsValid());
+ ASSERT_EQ(type_die.Tag(), DW_TAG_base_type);
+
+ ParsedDWARFTypeAttributes attrs(type_die);
+ EXPECT_EQ(attrs.byte_size.value_or(0), 1U);
+ EXPECT_EQ(attrs.data_bit_size.value_or(0), 2U);
+
+ SymbolContext sc;
+ auto type_sp =
+ ast_parser.ParseTypeFromDWARF(sc, type_die, /*type_is_new_ptr=*/nullptr);
+ ASSERT_NE(type_sp, nullptr);
+
+ EXPECT_EQ(llvm::expectedToOptional(type_sp->GetByteSize(nullptr)).value_or(0),
+ 1U);
+}
+
+TEST_F(DWARFASTParserClangTests, TestBitIntParsing) {
+ // Tests that we correctly parse the DW_AT_base_type for a _BitInt.
+ // Older versions of Clang only emit the `_BitInt` string into the
+ // DW_AT_name (not including the bitsize). Make sure we understand
+ // those too.
+
+ const char *yamldata = R"(
+--- !ELF
+FileHeader:
+ Class: ELFCLASS64
+ Data: ELFDATA2LSB
+ Type: ET_EXEC
+ Machine: EM_AARCH64
+DWARF:
+ debug_str:
+ - _BitInt(2)
+ - _BitInt
+ - unsigned _BitInt(2)
+ - unsigned _BitInt
+ debug_abbrev:
+ - ID: 0
+ Table:
+ - Code: 0x1
+ Tag: DW_TAG_compile_unit
+ Children: DW_CHILDREN_yes
+ Attributes:
+ - Attribute: DW_AT_language
+ Form: DW_FORM_data2
+ - Code: 0x2
+ Tag: DW_TAG_base_type
+ Children: DW_CHILDREN_no
+ Attributes:
+ - Attribute: DW_AT_name
+ Form: DW_FORM_strp
+ - Attribute: DW_AT_encoding
+ Form: DW_FORM_data1
+ - Attribute: DW_AT_byte_size
+ Form: DW_FORM_data1
+ - Attribute: DW_AT_bit_size
+ Form: DW_FORM_data1
+ - Code: 0x3
+ Tag: DW_TAG_base_type
+ Children: DW_CHILDREN_no
+ Attributes:
+ - Attribute: DW_AT_name
+ Form: DW_FORM_strp
+ - Attribute: DW_AT_encoding
+ Form: DW_FORM_data1
+ - Attribute: DW_AT_byte_size
+ Form: DW_FORM_data1
+
+ debug_info:
+ - Version: 5
+ UnitType: DW_UT_compile
+ AddrSize: 8
+ Entries:
+
+# DW_TAG_compile_unit
+# DW_AT_language [DW_FORM_data2] (DW_LANG_C_plus_plus)
+
+ - AbbrCode: 0x1
+ Values:
+ - Value: 0x04
+
+# DW_TAG_base_type
+# DW_AT_name [DW_FORM_strp] ('_BitInt(2)')
+
+ - AbbrCode: 0x2
+ Values:
+ - Value: 0x0
+ - Value: 0x05
+ - Value: 0x01
+ - Value: 0x02
+
+# DW_TAG_base_type
+# DW_AT_name [DW_FORM_strp] ('_BitInt')
+
+ - AbbrCode: 0x2
+ Values:
+ - Value: 0x0b
+ - Value: 0x05
+ - Value: 0x08
+ - Value: 0x34
+
+# DW_TAG_base_type
+# DW_AT_name [DW_FORM_strp] ('unsigned _BitInt(2)')
+
+ - AbbrCode: 0x2
+ Values:
+ - Value: 0x13
+ - Value: 0x07
+ - Value: 0x01
+ - Value: 0x02
+
+# DW_TAG_base_type
+# DW_AT_name [DW_FORM_strp] ('unsigned _BitInt')
+
+ - AbbrCode: 0x2
+ Values:
+ - Value: 0x27
+ - Value: 0x07
+ - Value: 0x08
+ - Value: 0x34
+
+# DW_TAG_base_type
+# DW_AT_name [DW_FORM_strp] ('_BitInt')
+
+ - AbbrCode: 0x3
+ Values:
+ - Value: 0x0b
+ - Value: 0x05
+ - Value: 0x08
+...
+
+)";
+
+ YAMLModuleTester t(yamldata);
+
+ DWARFUnit *unit = t.GetDwarfUnit();
+ ASSERT_NE(unit, nullptr);
+ const DWARFDebugInfoEntry *cu_entry = unit->DIE().GetDIE();
+ ASSERT_EQ(cu_entry->Tag(), DW_TAG_compile_unit);
+ ASSERT_EQ(unit->GetDWARFLanguageType(), DW_LANG_C_plus_plus);
+ DWARFDIE cu_die(unit, cu_entry);
+
+ auto holder = std::make_unique<clang_utils::TypeSystemClangHolder>("ast");
+ auto &ast_ctx = *holder->GetAST();
+ DWARFASTParserClangStub ast_parser(ast_ctx);
+
+ auto type_die = cu_die.GetFirstChild();
+ ASSERT_TRUE(type_die.IsValid());
+
+ {
+ SymbolContext sc;
+ auto type_sp = ast_parser.ParseTypeFromDWARF(sc, type_die,
+ /*type_is_new_ptr=*/nullptr);
+ ASSERT_NE(type_sp, nullptr);
+
+ EXPECT_EQ(
+ llvm::expectedToOptional(type_sp->GetByteSize(nullptr)).value_or(0),
+ 1U);
+ EXPECT_EQ(type_sp->GetEncoding(), lldb::eEncodingSint);
+ EXPECT_EQ(type_sp->GetName(), "_BitInt(2)");
+ EXPECT_EQ(type_sp->GetForwardCompilerType().GetTypeName(), "_BitInt(2)");
+ }
+
+ {
+ type_die = type_die.GetSibling();
+ SymbolContext sc;
+ auto type_sp = ast_parser.ParseTypeFromDWARF(sc, type_die,
+ /*type_is_new_ptr=*/nullptr);
+ ASSERT_NE(type_sp, nullptr);
+
+ EXPECT_EQ(
+ llvm::expectedToOptional(type_sp->GetByteSize(nullptr)).value_or(0),
+ 8U);
+ EXPECT_EQ(type_sp->GetEncoding(), lldb::eEncodingSint);
+ EXPECT_EQ(type_sp->GetName(), "_BitInt");
+ EXPECT_EQ(type_sp->GetForwardCompilerType().GetTypeName(), "_BitInt(52)");
+ }
+
+ {
+ type_die = type_die.GetSibling();
+ SymbolContext sc;
+ auto type_sp = ast_parser.ParseTypeFromDWARF(sc, type_die,
+ /*type_is_new_ptr=*/nullptr);
+ ASSERT_NE(type_sp, nullptr);
+
+ EXPECT_EQ(
+ llvm::expectedToOptional(type_sp->GetByteSize(nullptr)).value_or(0),
+ 1U);
+ EXPECT_EQ(type_sp->GetEncoding(), lldb::eEncodingUint);
+ EXPECT_EQ(type_sp->GetName(), "unsigned _BitInt(2)");
+ EXPECT_EQ(type_sp->GetForwardCompilerType().GetTypeName(),
+ "unsigned _BitInt(2)");
+ }
+
+ {
+ type_die = type_die.GetSibling();
+ SymbolContext sc;
+ auto type_sp = ast_parser.ParseTypeFromDWARF(sc, type_die,
+ /*type_is_new_ptr=*/nullptr);
+ ASSERT_NE(type_sp, nullptr);
+
+ EXPECT_EQ(
+ llvm::expectedToOptional(type_sp->GetByteSize(nullptr)).value_or(0),
+ 8U);
+ EXPECT_EQ(type_sp->GetEncoding(), lldb::eEncodingUint);
+ EXPECT_EQ(type_sp->GetName(), "unsigned _BitInt");
+ EXPECT_EQ(type_sp->GetForwardCompilerType().GetTypeName(),
+ "unsigned _BitInt(52)");
+ }
+
+ {
+ type_die = type_die.GetSibling();
+ SymbolContext sc;
+ auto type_sp = ast_parser.ParseTypeFromDWARF(sc, type_die,
+ /*type_is_new_ptr=*/nullptr);
+ ASSERT_NE(type_sp, nullptr);
+
+ EXPECT_EQ(
+ llvm::expectedToOptional(type_sp->GetByteSize(nullptr)).value_or(0),
+ 8U);
+ EXPECT_EQ(type_sp->GetEncoding(), lldb::eEncodingSint);
+ EXPECT_EQ(type_sp->GetName(), "_BitInt");
+
+ // Older versions of Clang didn't emit a DW_AT_bit_size for _BitInt. In
+ // those cases we would format the CompilerType name using the byte-size.
+ EXPECT_EQ(type_sp->GetForwardCompilerType().GetTypeName(), "_BitInt(64)");
+ }
+}
generated by cgit v1.1 at 2025-11-01 09:45:01 +0000