[Lldb-commits] [lldb] r337959 - [DataFormatters] Add formatter for C++17 std::optional.
Davide Italiano via lldb-commits
lldb-commits at lists.llvm.org
Wed Jul 25 13:46:29 PDT 2018
Author: davide
Date: Wed Jul 25 13:46:29 2018
New Revision: 337959
URL: http://llvm.org/viewvc/llvm-project?rev=337959&view=rev
Log:
[DataFormatters] Add formatter for C++17 std::optional.
<rdar://problem/41471112>
Patch by Shafik Yaghmour.
Differential Revision: https://reviews.llvm.org/D49271
Added:
lldb/trunk/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/
lldb/trunk/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/Makefile
lldb/trunk/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/TestDataFormatterLibcxxOptional.py
lldb/trunk/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/main.cpp
lldb/trunk/source/Plugins/Language/CPlusPlus/LibCxxOptional.cpp
Added: lldb/trunk/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/Makefile
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/Makefile?rev=337959&view=auto
==============================================================================
--- lldb/trunk/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/Makefile (added)
+++ lldb/trunk/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/Makefile Wed Jul 25 13:46:29 2018
@@ -0,0 +1,7 @@
+LEVEL = ../../../../../make
+
+CXX_SOURCES := main.cpp
+
+USE_LIBCPP := 1
+include $(LEVEL)/Makefile.rules
+CXXFLAGS += -std=c++17
Added: lldb/trunk/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/TestDataFormatterLibcxxOptional.py
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/TestDataFormatterLibcxxOptional.py?rev=337959&view=auto
==============================================================================
--- lldb/trunk/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/TestDataFormatterLibcxxOptional.py (added)
+++ lldb/trunk/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/TestDataFormatterLibcxxOptional.py Wed Jul 25 13:46:29 2018
@@ -0,0 +1,59 @@
+"""
+Test lldb data formatter subsystem.
+"""
+
+from __future__ import print_function
+
+
+import os
+import time
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class LibcxxOptionalDataFormatterTestCase(TestBase):
+
+ mydir = TestBase.compute_mydir(__file__)
+
+ @add_test_categories(["libc++"])
+
+ def test_with_run_command(self):
+ """Test that that file and class static variables display correctly."""
+ self.build()
+ self.runCmd("file " + self.getBuildArtifact("a.out"), CURRENT_EXECUTABLE_SET)
+
+ bkpt = self.target().FindBreakpointByID(
+ lldbutil.run_break_set_by_source_regexp(
+ self, "break here"))
+
+ self.runCmd("run", RUN_SUCCEEDED)
+
+ # The stop reason of the thread should be breakpoint.
+ self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
+ substrs=['stopped',
+ 'stop reason = breakpoint'])
+
+ self.expect("frame variable number_not_engaged",
+ substrs=['Has Value=false'])
+
+ self.expect("frame variable number_engaged",
+ substrs=['Has Value=true',
+ 'Value = 42',
+ '}'])
+
+ self.expect("frame var numbers",
+ substrs=['(optional_int_vect) numbers = Has Value=true {',
+ 'Value = size=4 {',
+ '[0] = 1',
+ '[1] = 2',
+ '[2] = 3',
+ '[3] = 4',
+ '}',
+ '}'])
+
+ self.expect("frame var ostring",
+ substrs=['(optional_string) ostring = Has Value=true {',
+ 'Value = "hello"',
+ '}'])
Added: lldb/trunk/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/main.cpp
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/main.cpp?rev=337959&view=auto
==============================================================================
--- lldb/trunk/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/main.cpp (added)
+++ lldb/trunk/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libcxx/optional/main.cpp Wed Jul 25 13:46:29 2018
@@ -0,0 +1,27 @@
+#include <cstdio>
+#include <string>
+#include <vector>
+#include <optional>
+
+using int_vect = std::vector<int> ;
+using optional_int = std::optional<int> ;
+using optional_int_vect = std::optional<int_vect> ;
+using optional_string = std::optional<std::string> ;
+
+int main()
+{
+ optional_int number_not_engaged ;
+ optional_int number_engaged = 42 ;
+
+ printf( "%d\n", *number_engaged) ;
+
+ optional_int_vect numbers{{1,2,3,4}} ;
+
+ printf( "%d %d\n", numbers.value()[0], numbers.value()[1] ) ;
+
+ optional_string ostring = "hello" ;
+
+ printf( "%s\n", ostring->c_str() ) ;
+
+ return 0; // break here
+}
Added: lldb/trunk/source/Plugins/Language/CPlusPlus/LibCxxOptional.cpp
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/source/Plugins/Language/CPlusPlus/LibCxxOptional.cpp?rev=337959&view=auto
==============================================================================
--- lldb/trunk/source/Plugins/Language/CPlusPlus/LibCxxOptional.cpp (added)
+++ lldb/trunk/source/Plugins/Language/CPlusPlus/LibCxxOptional.cpp Wed Jul 25 13:46:29 2018
@@ -0,0 +1,85 @@
+//===-- LibCxxOptional.cpp --------------------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "LibCxx.h"
+#include "lldb/DataFormatters/FormattersHelpers.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+namespace {
+
+class OptionalFrontEnd : public SyntheticChildrenFrontEnd {
+public:
+ OptionalFrontEnd(ValueObject &valobj) : SyntheticChildrenFrontEnd(valobj) {
+ Update();
+ }
+
+ size_t GetIndexOfChildWithName(const ConstString &name) override {
+ return formatters::ExtractIndexFromString(name.GetCString());
+ }
+
+ bool MightHaveChildren() override { return true; }
+ bool Update() override;
+ size_t CalculateNumChildren() override { return m_size; }
+ ValueObjectSP GetChildAtIndex(size_t idx) override;
+
+private:
+ size_t m_size = 0;
+ ValueObjectSP m_base_sp;
+};
+} // namespace
+
+bool OptionalFrontEnd::Update() {
+ ValueObjectSP engaged_sp(
+ m_backend.GetChildMemberWithName(ConstString("__engaged_"), true));
+
+ if (!engaged_sp)
+ return false;
+
+ // __engaged_ is a bool flag and is true if the optional contains a value.
+ // Converting it to unsigned gives us a size of 1 if it contains a value
+ // and 0 if not.
+ m_size = engaged_sp->GetValueAsUnsigned(0);
+
+ return false;
+}
+
+ValueObjectSP OptionalFrontEnd::GetChildAtIndex(size_t idx) {
+ if (idx >= m_size)
+ return ValueObjectSP();
+
+ // __val_ contains the underlying value of an optional if it has one.
+ // Currently because it is part of an anonymous union GetChildMemberWithName()
+ // does not peer through and find it unless we are at the parent itself.
+ // We can obtain the parent through __engaged_.
+ ValueObjectSP val_sp(
+ m_backend.GetChildMemberWithName(ConstString("__engaged_"), true)
+ ->GetParent()
+ ->GetChildAtIndex(0, true)
+ ->GetChildMemberWithName(ConstString("__val_"), true));
+
+ if (!val_sp)
+ return ValueObjectSP();
+
+ CompilerType holder_type = val_sp->GetCompilerType();
+
+ if (!holder_type)
+ return ValueObjectSP();
+
+ return val_sp->Clone(ConstString(llvm::formatv("Value").str()));
+}
+
+SyntheticChildrenFrontEnd *
+formatters::LibcxxOptionalFrontEndCreator(CXXSyntheticChildren *,
+ lldb::ValueObjectSP valobj_sp) {
+ if (valobj_sp)
+ return new OptionalFrontEnd(*valobj_sp);
+ return nullptr;
+}
More information about the lldb-commits
mailing list