https://github.com/Michael137 updated
https://github.com/llvm/llvm-project/pull/147340
>From dba291d4b0b5ac6e62cfc084340cc0524d15d51c Mon Sep 17 00:00:00 2001
From: Michael Buch <michaelbuc...@gmail.com>
Date: Mon, 7 Jul 2025 14:45:59 +0100
Subject: [PATCH 1/2] [lldb][Formatters] Consistently unwrap pointer
element_type in std::shared_ptr formatters
---
.../lldb/DataFormatters/FormattersHelpers.h | 5 +++++
lldb/source/DataFormatters/FormattersHelpers.cpp | 13 +++++++++++++
lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp | 14 +++++++-------
.../Plugins/Language/CPlusPlus/LibStdcpp.cpp | 12 ++++++------
.../shared_ptr/TestDataFormatterStdSharedPtr.py | 4 ++++
5 files changed, 35 insertions(+), 13 deletions(-)
diff --git a/lldb/include/lldb/DataFormatters/FormattersHelpers.h
b/lldb/include/lldb/DataFormatters/FormattersHelpers.h
index 6a47cf37eac64..c7ce199452e1d 100644
--- a/lldb/include/lldb/DataFormatters/FormattersHelpers.h
+++ b/lldb/include/lldb/DataFormatters/FormattersHelpers.h
@@ -63,6 +63,11 @@ void DumpCxxSmartPtrPointerSummary(Stream &stream,
ValueObject &ptr,
bool ContainerSizeSummaryProvider(ValueObject &valobj, Stream &stream,
const TypeSummaryOptions &options);
+/// Return the ValueObjectSP of the underlying pointer member whose type
+/// is a desugared 'std::shared_ptr::element_type *'.
+lldb::ValueObjectSP GetCxxSmartPtrElementPointerType(ValueObject &ptr,
+ ValueObject &container);
+
Address GetArrayAddressOrPointerValue(ValueObject &valobj);
time_t GetOSXEpoch();
diff --git a/lldb/source/DataFormatters/FormattersHelpers.cpp
b/lldb/source/DataFormatters/FormattersHelpers.cpp
index 028fc5da73dc0..104c2ce6f1c0a 100644
--- a/lldb/source/DataFormatters/FormattersHelpers.cpp
+++ b/lldb/source/DataFormatters/FormattersHelpers.cpp
@@ -151,3 +151,16 @@ bool
lldb_private::formatters::ContainerSizeSummaryProvider(
return FormatEntity::FormatStringRef("size=${svar%#}", stream, nullptr,
nullptr, nullptr, &valobj, false,
false);
}
+
+ValueObjectSP lldb_private::formatters::GetCxxSmartPtrElementPointerType(
+ ValueObject &ptr, ValueObject &container) {
+ auto container_type = container.GetCompilerType().GetNonReferenceType();
+ if (!container_type)
+ return nullptr;
+
+ auto arg = container_type.GetTypeTemplateArgument(0);
+ if (!arg)
+ return nullptr;
+
+ return ptr.Cast(arg.GetPointerType());
+}
diff --git a/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
b/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
index 3079de4936a85..f73a77836034f 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
+++ b/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
@@ -264,11 +264,7 @@
lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::GetChildAtIndex(
if (idx == 1) {
Status status;
- auto value_type_sp = valobj_sp->GetCompilerType()
- .GetTypeTemplateArgument(0)
- .GetPointerType();
- ValueObjectSP cast_ptr_sp = m_ptr_obj->Cast(value_type_sp);
- ValueObjectSP value_sp = cast_ptr_sp->Dereference(status);
+ ValueObjectSP value_sp = m_ptr_obj->Dereference(status);
if (status.Success())
return value_sp;
}
@@ -293,7 +289,11 @@
lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::Update() {
if (!ptr_obj_sp)
return lldb::ChildCacheState::eRefetch;
- m_ptr_obj = ptr_obj_sp->Clone(ConstString("pointer")).get();
+ auto cast_ptr_sp = GetCxxSmartPtrElementPointerType(*ptr_obj_sp, *valobj_sp);
+ if (!cast_ptr_sp)
+ return lldb::ChildCacheState::eRefetch;
+
+ m_ptr_obj = cast_ptr_sp->Clone(ConstString("pointer")).get();
lldb::ValueObjectSP cntrl_sp(valobj_sp->GetChildMemberWithName("__cntrl_"));
@@ -305,7 +305,7 @@
lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::Update() {
llvm::Expected<size_t>
lldb_private::formatters::LibcxxSharedPtrSyntheticFrontEnd::
GetIndexOfChildWithName(ConstString name) {
- if (name == "__ptr_" || name == "pointer")
+ if (name == "pointer")
return 0;
if (name == "object" || name == "$$dereference$$")
diff --git a/lldb/source/Plugins/Language/CPlusPlus/LibStdcpp.cpp
b/lldb/source/Plugins/Language/CPlusPlus/LibStdcpp.cpp
index 84442273aebd4..d66b8339809be 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/LibStdcpp.cpp
+++ b/lldb/source/Plugins/Language/CPlusPlus/LibStdcpp.cpp
@@ -273,11 +273,7 @@
LibStdcppSharedPtrSyntheticFrontEnd::GetChildAtIndex(uint32_t idx) {
return nullptr;
Status status;
- auto value_type_sp = valobj_sp->GetCompilerType()
- .GetTypeTemplateArgument(0)
- .GetPointerType();
- ValueObjectSP cast_ptr_sp = m_ptr_obj->Cast(value_type_sp);
- ValueObjectSP value_sp = cast_ptr_sp->Dereference(status);
+ ValueObjectSP value_sp = m_ptr_obj->Dereference(status);
if (status.Success())
return value_sp;
}
@@ -297,7 +293,11 @@ lldb::ChildCacheState
LibStdcppSharedPtrSyntheticFrontEnd::Update() {
if (!ptr_obj_sp)
return lldb::ChildCacheState::eRefetch;
- m_ptr_obj = ptr_obj_sp->Clone(ConstString("pointer")).get();
+ auto cast_ptr_sp = GetCxxSmartPtrElementPointerType(*ptr_obj_sp, *valobj_sp);
+ if (!cast_ptr_sp)
+ return lldb::ChildCacheState::eRefetch;
+
+ m_ptr_obj = cast_ptr_sp->Clone(ConstString("pointer")).get();
return lldb::ChildCacheState::eRefetch;
}
diff --git
a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/generic/shared_ptr/TestDataFormatterStdSharedPtr.py
b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/generic/shared_ptr/TestDataFormatterStdSharedPtr.py
index 8b641c9643958..3d8569da0332e 100644
---
a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/generic/shared_ptr/TestDataFormatterStdSharedPtr.py
+++
b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/generic/shared_ptr/TestDataFormatterStdSharedPtr.py
@@ -99,6 +99,10 @@ def do_test(self):
"wie", type="std::weak_ptr<int>", summary="nullptr strong=2 weak=2"
)
+ self.expect_var_path("si.pointer", type="int *")
+ self.expect_var_path("*si.pointer", type="int", value="47")
+ self.expect_var_path("si.object", type="int", value="47")
+
self.runCmd("settings set target.experimental.use-DIL true")
self.expect_var_path("ptr_node->value", value="1")
self.expect_var_path("ptr_node->next->value", value="2")
>From 8abf398247fc0d77efb980903ae6e84fb17215d8 Mon Sep 17 00:00:00 2001
From: Michael Buch <michaelbuc...@gmail.com>
Date: Tue, 8 Jul 2025 10:03:56 +0100
Subject: [PATCH 2/2] fixup! move helper into CPlusPlus plugin
---
.../lldb/DataFormatters/FormattersHelpers.h | 5 -----
.../DataFormatters/FormattersHelpers.cpp | 13 -----------
.../Plugins/Language/CPlusPlus/CMakeLists.txt | 1 +
.../Plugins/Language/CPlusPlus/Generic.cpp | 22 +++++++++++++++++++
.../Plugins/Language/CPlusPlus/Generic.h | 5 +++++
.../Plugins/Language/CPlusPlus/LibCxx.cpp | 1 +
.../Plugins/Language/CPlusPlus/LibStdcpp.cpp | 1 +
7 files changed, 30 insertions(+), 18 deletions(-)
create mode 100644 lldb/source/Plugins/Language/CPlusPlus/Generic.cpp
diff --git a/lldb/include/lldb/DataFormatters/FormattersHelpers.h
b/lldb/include/lldb/DataFormatters/FormattersHelpers.h
index c7ce199452e1d..6a47cf37eac64 100644
--- a/lldb/include/lldb/DataFormatters/FormattersHelpers.h
+++ b/lldb/include/lldb/DataFormatters/FormattersHelpers.h
@@ -63,11 +63,6 @@ void DumpCxxSmartPtrPointerSummary(Stream &stream,
ValueObject &ptr,
bool ContainerSizeSummaryProvider(ValueObject &valobj, Stream &stream,
const TypeSummaryOptions &options);
-/// Return the ValueObjectSP of the underlying pointer member whose type
-/// is a desugared 'std::shared_ptr::element_type *'.
-lldb::ValueObjectSP GetCxxSmartPtrElementPointerType(ValueObject &ptr,
- ValueObject &container);
-
Address GetArrayAddressOrPointerValue(ValueObject &valobj);
time_t GetOSXEpoch();
diff --git a/lldb/source/DataFormatters/FormattersHelpers.cpp
b/lldb/source/DataFormatters/FormattersHelpers.cpp
index 104c2ce6f1c0a..028fc5da73dc0 100644
--- a/lldb/source/DataFormatters/FormattersHelpers.cpp
+++ b/lldb/source/DataFormatters/FormattersHelpers.cpp
@@ -151,16 +151,3 @@ bool
lldb_private::formatters::ContainerSizeSummaryProvider(
return FormatEntity::FormatStringRef("size=${svar%#}", stream, nullptr,
nullptr, nullptr, &valobj, false,
false);
}
-
-ValueObjectSP lldb_private::formatters::GetCxxSmartPtrElementPointerType(
- ValueObject &ptr, ValueObject &container) {
- auto container_type = container.GetCompilerType().GetNonReferenceType();
- if (!container_type)
- return nullptr;
-
- auto arg = container_type.GetTypeTemplateArgument(0);
- if (!arg)
- return nullptr;
-
- return ptr.Cast(arg.GetPointerType());
-}
diff --git a/lldb/source/Plugins/Language/CPlusPlus/CMakeLists.txt
b/lldb/source/Plugins/Language/CPlusPlus/CMakeLists.txt
index 5ba2567c80cc3..e2be1705d5529 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/CMakeLists.txt
+++ b/lldb/source/Plugins/Language/CPlusPlus/CMakeLists.txt
@@ -12,6 +12,7 @@ add_lldb_library(lldbPluginCPlusPlusLanguage PLUGIN
CPlusPlusLanguage.cpp
CPlusPlusNameParser.cpp
CxxStringTypes.cpp
+ Generic.cpp
GenericBitset.cpp
GenericOptional.cpp
LibCxx.cpp
diff --git a/lldb/source/Plugins/Language/CPlusPlus/Generic.cpp
b/lldb/source/Plugins/Language/CPlusPlus/Generic.cpp
new file mode 100644
index 0000000000000..40260b784efb9
--- /dev/null
+++ b/lldb/source/Plugins/Language/CPlusPlus/Generic.cpp
@@ -0,0 +1,22 @@
+//===-- Generic.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 "Generic.h"
+
+lldb::ValueObjectSP lldb_private::formatters::GetCxxSmartPtrElementPointerType(
+ ValueObject &ptr, ValueObject &container) {
+ auto container_type = container.GetCompilerType().GetNonReferenceType();
+ if (!container_type)
+ return nullptr;
+
+ auto arg = container_type.GetTypeTemplateArgument(0);
+ if (!arg)
+ return nullptr;
+
+ return ptr.Cast(arg.GetPointerType());
+}
diff --git a/lldb/source/Plugins/Language/CPlusPlus/Generic.h
b/lldb/source/Plugins/Language/CPlusPlus/Generic.h
index 34efef9e82e5c..717c1ecdaec80 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/Generic.h
+++ b/lldb/source/Plugins/Language/CPlusPlus/Generic.h
@@ -19,6 +19,11 @@ namespace formatters {
bool GenericOptionalSummaryProvider(ValueObject &valobj, Stream &stream,
const TypeSummaryOptions &options);
+/// Return the ValueObjectSP of the underlying pointer member whose type
+/// is a desugared 'std::shared_ptr::element_type *'.
+lldb::ValueObjectSP GetCxxSmartPtrElementPointerType(ValueObject &ptr,
+ ValueObject &container);
+
} // namespace formatters
} // namespace lldb_private
diff --git a/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
b/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
index f73a77836034f..41c4a4952c802 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
+++ b/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
@@ -25,6 +25,7 @@
#include "lldb/ValueObject/ValueObjectConstResult.h"
#include "Plugins/Language/CPlusPlus/CxxStringTypes.h"
+#include "Plugins/Language/CPlusPlus/Generic.h"
#include "Plugins/LanguageRuntime/CPlusPlus/CPPLanguageRuntime.h"
#include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
#include "lldb/lldb-enumerations.h"
diff --git a/lldb/source/Plugins/Language/CPlusPlus/LibStdcpp.cpp
b/lldb/source/Plugins/Language/CPlusPlus/LibStdcpp.cpp
index d66b8339809be..4654ca91489fc 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/LibStdcpp.cpp
+++ b/lldb/source/Plugins/Language/CPlusPlus/LibStdcpp.cpp
@@ -9,6 +9,7 @@
#include "LibStdcpp.h"
#include "LibCxx.h"
+#include "Plugins/Language/CPlusPlus/Generic.h"
#include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
#include "lldb/DataFormatters/FormattersHelpers.h"
#include "lldb/DataFormatters/StringPrinter.h"
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