[Lldb-commits] [lldb] ce6a56e - Reland "[lldb] Add support for DW_AT_default_value in template params"
Michael Buch via lldb-commits
lldb-commits at lists.llvm.org
Fri Jan 27 14:50:30 PST 2023
Author: Michael Buch
Date: 2023-01-27T22:49:46Z
New Revision: ce6a56e66781eaad11c7285d37c1c410414676de
URL: https://github.com/llvm/llvm-project/commit/ce6a56e66781eaad11c7285d37c1c410414676de
DIFF: https://github.com/llvm/llvm-project/commit/ce6a56e66781eaad11c7285d37c1c410414676de.diff
LOG: Reland "[lldb] Add support for DW_AT_default_value in template params"
**Summary**
This patch makes LLDB understand the `DW_AT_default_value` on
template argument DIEs. As a result, type summaries will no
longer contain the defaulted template arguments, reducing
noise substantially. E.g.,
Before:
```
(lldb) v nested
(std::vector<std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, std::allocator<std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator <char> > > > > >) nested = size=0 {}
```
After:
```
(lldb) v nested
(std::vector<std::vector<std::basic_string<char> > >) nested = size=0 {}
```
See discussion in https://reviews.llvm.org/D140423
**Testing**
* Adjust API tests
* Added unit-test
Differential Revision: https://reviews.llvm.org/D141828
Added:
lldb/unittests/SymbolFile/DWARF/Inputs/DW_AT_default_value-test.yaml
Modified:
lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
lldb/test/API/commands/expression/import-std-module/non-module-type-separation/TestNonModuleTypeSeparation.py
lldb/test/API/commands/expression/import-std-module/retry-with-std-module/TestRetryWithStdModule.py
lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/shared_ptr/TestDataFormatterLibcxxSharedPtr.py
lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/TestDataFormatterLibcxxString.py
lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string_view/TestDataFormatterLibcxxStringView.py
lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/unique_ptr/TestDataFormatterLibcxxUniquePtr.py
lldb/unittests/SymbolFile/DWARF/CMakeLists.txt
lldb/unittests/SymbolFile/DWARF/DWARFASTParserClangTests.cpp
Removed:
################################################################################
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp b/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
index 49c8fae64ed8a..4429b4fcae2a0 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
@@ -2003,6 +2003,7 @@ bool DWARFASTParserClang::ParseTemplateDIE(
CompilerType clang_type;
uint64_t uval64 = 0;
bool uval64_valid = false;
+ bool is_default_template_arg = false;
if (num_attributes > 0) {
DWARFFormValue form_value;
for (size_t i = 0; i < num_attributes; ++i) {
@@ -2033,6 +2034,10 @@ bool DWARFASTParserClang::ParseTemplateDIE(
uval64 = form_value.Unsigned();
}
break;
+ case DW_AT_default_value:
+ if (attributes.ExtractFormValueAtIndex(i, form_value))
+ is_default_template_arg = form_value.Boolean();
+ break;
default:
break;
}
@@ -2058,16 +2063,19 @@ bool DWARFASTParserClang::ParseTemplateDIE(
template_param_infos.InsertArg(
name,
clang::TemplateArgument(ast, llvm::APSInt(apint, !is_signed),
- ClangUtil::GetQualType(clang_type)));
+ ClangUtil::GetQualType(clang_type),
+ is_default_template_arg));
} else {
template_param_infos.InsertArg(
- name,
- clang::TemplateArgument(ClangUtil::GetQualType(clang_type)));
+ name, clang::TemplateArgument(ClangUtil::GetQualType(clang_type),
+ /*isNullPtr*/ false,
+ is_default_template_arg));
}
} else {
auto *tplt_type = m_ast.CreateTemplateTemplateParmDecl(template_name);
template_param_infos.InsertArg(
- name, clang::TemplateArgument(clang::TemplateName(tplt_type)));
+ name, clang::TemplateArgument(clang::TemplateName(tplt_type),
+ is_default_template_arg));
}
}
}
diff --git a/lldb/test/API/commands/expression/import-std-module/non-module-type-separation/TestNonModuleTypeSeparation.py b/lldb/test/API/commands/expression/import-std-module/non-module-type-separation/TestNonModuleTypeSeparation.py
index 8f40e92e70d24..3e8910a79e4be 100644
--- a/lldb/test/API/commands/expression/import-std-module/non-module-type-separation/TestNonModuleTypeSeparation.py
+++ b/lldb/test/API/commands/expression/import-std-module/non-module-type-separation/TestNonModuleTypeSeparation.py
@@ -31,22 +31,16 @@ def test(self):
ValueCheck(value="2"),
]
- # The debug info vector type doesn't know about the default template
- # arguments, so they will be printed.
- debug_info_vector_type = "std::vector<int, std::allocator<int> >"
-
- # The C++ module vector knows its default template arguments and will
- # suppress them.
- module_vector_type = "std::vector<int>"
+ vector_type = "std::vector<int>"
# First muddy the scratch AST with non-C++ module types.
- self.expect_expr("a", result_type=debug_info_vector_type,
+ self.expect_expr("a", result_type=vector_type,
result_children=children)
self.expect_expr("dbg_info_vec",
- result_type="std::vector<DbgInfoClass, std::allocator<DbgInfoClass> >",
+ result_type="std::vector<DbgInfoClass>",
result_children=[
ValueCheck(type="DbgInfoClass", children=[
- ValueCheck(name="ints", type=debug_info_vector_type, children=[
+ ValueCheck(name="ints", type=vector_type, children=[
ValueCheck(value="1")
])
])
@@ -54,7 +48,7 @@ def test(self):
# Enable the C++ module import and get the module vector type.
self.runCmd("settings set target.import-std-module true")
- self.expect_expr("a", result_type=module_vector_type,
+ self.expect_expr("a", result_type=vector_type,
result_children=children)
# Test mixed debug info/module types
@@ -62,7 +56,7 @@ def test(self):
result_type="std::vector<DbgInfoClass>",
result_children=[
ValueCheck(type="DbgInfoClass", children=[
- ValueCheck(name="ints", type=module_vector_type, children=[
+ ValueCheck(name="ints", type=vector_type, children=[
ValueCheck(value="1")
])
])
@@ -71,15 +65,15 @@ def test(self):
# Turn off the C++ module import and use debug info types again.
self.runCmd("settings set target.import-std-module false")
- self.expect_expr("a", result_type=debug_info_vector_type,
+ self.expect_expr("a", result_type=vector_type,
result_children=children)
# Test the types that were previoiusly mixed debug info/module types.
self.expect_expr("dbg_info_vec",
- result_type="std::vector<DbgInfoClass, std::allocator<DbgInfoClass> >",
+ result_type="std::vector<DbgInfoClass>",
result_children=[
ValueCheck(type="DbgInfoClass", children=[
- ValueCheck(name="ints", type=debug_info_vector_type, children=[
+ ValueCheck(name="ints", type=vector_type, children=[
ValueCheck(value="1")
])
])
diff --git a/lldb/test/API/commands/expression/import-std-module/retry-with-std-module/TestRetryWithStdModule.py b/lldb/test/API/commands/expression/import-std-module/retry-with-std-module/TestRetryWithStdModule.py
index e102939375297..670839a8f2143 100644
--- a/lldb/test/API/commands/expression/import-std-module/retry-with-std-module/TestRetryWithStdModule.py
+++ b/lldb/test/API/commands/expression/import-std-module/retry-with-std-module/TestRetryWithStdModule.py
@@ -15,17 +15,15 @@ def test(self):
lldb.SBFileSpec("main.cpp"))
# Test printing the vector before enabling any C++ module setting.
- self.expect_expr("a", result_type="std::vector<int, std::allocator<int> >")
+ self.expect_expr("a", result_type="std::vector<int>")
# Set loading the import-std-module to 'fallback' which loads the module
# and retries when an expression fails to parse.
self.runCmd("settings set target.import-std-module fallback")
# Printing the vector still works. This should return the same type
- # as before as this shouldn't use a C++ module type (the C++ module type
- # is hiding the second template parameter as it's equal to the default
- # argument which the C++ module has type info for).
- self.expect_expr("a", result_type="std::vector<int, std::allocator<int> >")
+ # as before as this shouldn't use a C++ module type.
+ self.expect_expr("a", result_type="std::vector<int>")
# This expression can only parse with a C++ module. LLDB should
# automatically fall back to import the C++ module to get this working.
diff --git a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/shared_ptr/TestDataFormatterLibcxxSharedPtr.py b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/shared_ptr/TestDataFormatterLibcxxSharedPtr.py
index c646fccc2f5eb..b20ac521c7c32 100644
--- a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/shared_ptr/TestDataFormatterLibcxxSharedPtr.py
+++ b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/shared_ptr/TestDataFormatterLibcxxSharedPtr.py
@@ -60,7 +60,7 @@ def test_shared_ptr_variables(self):
valobj = self.expect_var_path(
"sp_str",
- type="std::shared_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >",
+ type="std::shared_ptr<std::basic_string<char> >",
children=[ValueCheck(name="__ptr_", summary='"hello"')],
)
self.assertRegex(valobj.summary, r'^"hello"( strong=1)? weak=1$')
diff --git a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/TestDataFormatterLibcxxString.py b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/TestDataFormatterLibcxxString.py
index 07b1aff74cfcd..7ac0efb4ca742 100644
--- a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/TestDataFormatterLibcxxString.py
+++ b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string/TestDataFormatterLibcxxString.py
@@ -70,8 +70,7 @@ def cleanup():
'(%s::u32string) u32_string = U"🍄🍅🍆🍌"'%ns,
# FIXME: This should have a 'U' prefix.
'(%s::u32string) u32_empty = ""'%ns,
- '(%s::basic_string<unsigned char, %s::char_traits<unsigned char>, '
- '%s::allocator<unsigned char> >) uchar = "aaaaa"'%(ns,ns,ns),
+ '(%s::basic_string<unsigned char>) uchar = "aaaaa"'%(ns),
'(%s::string *) null_str = nullptr'%ns,
])
@@ -108,8 +107,7 @@ def cleanup():
'(%s::u16string) u16_string = u"ß水氶"'%ns,
'(%s::u32string) u32_string = U"🍄🍅🍆🍌"'%ns,
'(%s::u32string) u32_empty = ""'%ns,
- '(%s::basic_string<unsigned char, %s::char_traits<unsigned char>, '
- '%s::allocator<unsigned char> >) uchar = "aaaaa"'%(ns,ns,ns),
+ '(%s::basic_string<unsigned char>) uchar = "aaaaa"'%(ns),
'(%s::string *) null_str = nullptr'%ns,
])
diff --git a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string_view/TestDataFormatterLibcxxStringView.py b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string_view/TestDataFormatterLibcxxStringView.py
index db82e7c65e033..7ebfabcf5fd69 100644
--- a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string_view/TestDataFormatterLibcxxStringView.py
+++ b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string_view/TestDataFormatterLibcxxStringView.py
@@ -96,10 +96,10 @@ def cleanup():
type='std::u32string_view',
summary='""')
self.expect_var_path('uchar_source',
- type='std::basic_string<unsigned char, std::char_traits<unsigned char>, std::allocator<unsigned char> >',
+ type='std::basic_string<unsigned char>',
summary='"aaaaaaaaaa"')
self.expect_var_path('uchar',
- type='std::basic_string_view<unsigned char, std::char_traits<unsigned char> >',
+ type='std::basic_string_view<unsigned char>',
summary='"aaaaa"')
self.expect_var_path('oops',
type='std::string_view',
@@ -172,10 +172,10 @@ def cleanup():
type='std::u32string_view',
summary='""')
self.expect_var_path('uchar_source',
- type='std::basic_string<unsigned char, std::char_traits<unsigned char>, std::allocator<unsigned char> >',
+ type='std::basic_string<unsigned char>',
summary='"aaaaaaaaaa"')
self.expect_var_path('uchar',
- type='std::basic_string_view<unsigned char, std::char_traits<unsigned char> >',
+ type='std::basic_string_view<unsigned char>',
summary='"aaaaa"')
self.runCmd('cont')
diff --git a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/unique_ptr/TestDataFormatterLibcxxUniquePtr.py b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/unique_ptr/TestDataFormatterLibcxxUniquePtr.py
index 70efdd84f242a..a0d12b4f2061d 100644
--- a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/unique_ptr/TestDataFormatterLibcxxUniquePtr.py
+++ b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/unique_ptr/TestDataFormatterLibcxxUniquePtr.py
@@ -22,7 +22,7 @@ def test_unique_ptr_variables(self):
valobj = self.expect_var_path(
"up_empty",
- type="std::unique_ptr<int, std::default_delete<int> >",
+ type="std::unique_ptr<int>",
summary="nullptr",
children=[ValueCheck(name="__value_")],
)
@@ -36,7 +36,7 @@ def test_unique_ptr_variables(self):
valobj = self.expect_var_path(
"up_int",
- type="std::unique_ptr<int, std::default_delete<int> >",
+ type="std::unique_ptr<int>",
summary="10",
children=[ValueCheck(name="__value_")],
)
@@ -44,7 +44,7 @@ def test_unique_ptr_variables(self):
valobj = self.expect_var_path(
"up_int_ref",
- type="std::unique_ptr<int, std::default_delete<int> > &",
+ type="std::unique_ptr<int> &",
summary="10",
children=[ValueCheck(name="__value_")],
)
@@ -52,7 +52,7 @@ def test_unique_ptr_variables(self):
valobj = self.expect_var_path(
"up_int_ref_ref",
- type="std::unique_ptr<int, std::default_delete<int> > &&",
+ type="std::unique_ptr<int> &&",
summary="10",
children=[ValueCheck(name="__value_")],
)
@@ -60,13 +60,13 @@ def test_unique_ptr_variables(self):
valobj = self.expect_var_path(
"up_str",
- type="std::unique_ptr<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::default_delete<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >",
+ type="std::unique_ptr<std::basic_string<char> >",
summary='"hello"',
children=[ValueCheck(name="__value_", summary='"hello"')],
)
valobj = self.expect_var_path(
- "up_user", type="std::unique_ptr<User, std::default_delete<User> >"
+ "up_user", type="std::unique_ptr<User>"
)
self.assertRegex(valobj.summary, "^User @ 0x0*[1-9a-f][0-9a-f]+$")
self.assertNotEqual(valobj.child[0].unsigned, 0)
diff --git a/lldb/unittests/SymbolFile/DWARF/CMakeLists.txt b/lldb/unittests/SymbolFile/DWARF/CMakeLists.txt
index 6af866153a138..4a37ece124291 100644
--- a/lldb/unittests/SymbolFile/DWARF/CMakeLists.txt
+++ b/lldb/unittests/SymbolFile/DWARF/CMakeLists.txt
@@ -24,6 +24,7 @@ add_lldb_unittest(SymbolFileDWARFTests
)
set(test_inputs
- test-dwarf.exe)
+ test-dwarf.exe
+ DW_AT_default_value-test.yaml)
add_unittest_inputs(SymbolFileDWARFTests "${test_inputs}")
diff --git a/lldb/unittests/SymbolFile/DWARF/DWARFASTParserClangTests.cpp b/lldb/unittests/SymbolFile/DWARF/DWARFASTParserClangTests.cpp
index 4d1c2aefb0a44..20a085741f73d 100644
--- a/lldb/unittests/SymbolFile/DWARF/DWARFASTParserClangTests.cpp
+++ b/lldb/unittests/SymbolFile/DWARF/DWARFASTParserClangTests.cpp
@@ -11,6 +11,7 @@
#include "Plugins/SymbolFile/DWARF/DWARFDIE.h"
#include "TestingSupport/Symbol/ClangTestUtils.h"
#include "TestingSupport/Symbol/YAMLModuleTester.h"
+#include "lldb/Core/Debugger.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
@@ -19,7 +20,14 @@ using namespace lldb_private;
using namespace lldb_private::dwarf;
namespace {
-class DWARFASTParserClangTests : public testing::Test {};
+static std::once_flag debugger_initialize_flag;
+
+class DWARFASTParserClangTests : public testing::Test {
+ void SetUp() override {
+ std::call_once(debugger_initialize_flag,
+ []() { Debugger::Initialize(nullptr); });
+ }
+};
class DWARFASTParserClangStub : public DWARFASTParserClang {
public:
@@ -404,3 +412,53 @@ TEST_F(ExtractIntFromFormValueTest, TestUnsignedInt) {
EXPECT_THAT_EXPECTED(Extract(ast.UnsignedIntTy, uint_max + 2),
llvm::Failed());
}
+
+TEST_F(DWARFASTParserClangTests, TestDefaultTemplateParamParsing) {
+ // Tests parsing DW_AT_default_value for template parameters.
+ auto BufferOrError = llvm::MemoryBuffer::getFile(
+ GetInputFilePath("DW_AT_default_value-test.yaml"), /*IsText=*/true);
+ ASSERT_TRUE(BufferOrError);
+ YAMLModuleTester t(BufferOrError.get()->getBuffer());
+
+ DWARFUnit *unit = t.GetDwarfUnit();
+ ASSERT_NE(unit, nullptr);
+ const DWARFDebugInfoEntry *cu_entry = unit->DIE().GetDIE();
+ ASSERT_EQ(cu_entry->Tag(), DW_TAG_compile_unit);
+ 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);
+
+ llvm::SmallVector<lldb::TypeSP, 2> types;
+ for (DWARFDIE die : cu_die.children()) {
+ if (die.Tag() == DW_TAG_class_type) {
+ SymbolContext sc;
+ bool new_type = false;
+ types.push_back(ast_parser.ParseTypeFromDWARF(sc, die, &new_type));
+ }
+ }
+
+ ASSERT_EQ(types.size(), 3U);
+
+ auto check_decl = [](auto const *decl) {
+ clang::ClassTemplateSpecializationDecl const *ctsd =
+ llvm::dyn_cast_or_null<clang::ClassTemplateSpecializationDecl>(decl);
+ ASSERT_NE(ctsd, nullptr);
+
+ auto const &args = ctsd->getTemplateArgs();
+ ASSERT_GT(args.size(), 0U);
+
+ for (auto const &arg : args.asArray()) {
+ EXPECT_TRUE(arg.getIsDefaulted());
+ }
+ };
+
+ for (auto const &type_sp : types) {
+ ASSERT_NE(type_sp, nullptr);
+ auto const *decl = ClangUtil::GetAsTagDecl(type_sp->GetFullCompilerType());
+ if (decl->getName() == "bar" || decl->getName() == "baz") {
+ check_decl(decl);
+ }
+ }
+}
diff --git a/lldb/unittests/SymbolFile/DWARF/Inputs/DW_AT_default_value-test.yaml b/lldb/unittests/SymbolFile/DWARF/Inputs/DW_AT_default_value-test.yaml
new file mode 100644
index 0000000000000..2e83d37affbde
--- /dev/null
+++ b/lldb/unittests/SymbolFile/DWARF/Inputs/DW_AT_default_value-test.yaml
@@ -0,0 +1,314 @@
+# template <typename T>
+# class foo {};
+#
+# template <template <typename T> class CT = foo>
+# class baz {};
+#
+# template <typename T = char, int i = 3, bool b = true,
+# typename c = foo<T>>
+# class bar {};
+#
+# int main() {
+# bar<> br;
+# baz<> bz;
+# return 0;
+# }
+#
+# YAML generated on Linux using obj2yaml on the above program
+# compiled with Clang.
+--- !ELF
+FileHeader:
+ Class: ELFCLASS64
+ Data: ELFDATA2LSB
+ Type: ET_REL
+ Machine: EM_AARCH64
+ SectionHeaderStringTable: .strtab
+Sections:
+ - Name: .text
+ Type: SHT_PROGBITS
+ Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
+ AddressAlign: 0x4
+ Content: FF4300D1E0031F2AFF0F00B9FF430091C0035FD6
+ - Name: .linker-options
+ Type: SHT_LLVM_LINKER_OPTIONS
+ Flags: [ SHF_EXCLUDE ]
+ AddressAlign: 0x1
+ Content: ''
+ - Name: .debug_abbrev
+ Type: SHT_PROGBITS
+ AddressAlign: 0x1
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