<rdar://problem/12953018>

Synthetic children and summary for std::vector<bool> (for both libcxx and libstdcpp).
std::vector<bool> is a special case and is custom-implemented to be a vector of bits, which means we failed to handle it with the standard std::vector<T> formatter.
This checkin provides custom formatters that work correctly

llvm-svn: 174333

lldb/include/lldb/DataFormatters/CXXFormatterFunctions.h

@@ -15,6 +15,7 @@
 
 #include "lldb/Core/ConstString.h"
 #include "lldb/DataFormatters/FormatClasses.h"
+#include "lldb/Target/Target.h"
 
 #include "clang/AST/ASTContext.h"
 
@@ -348,6 +349,69 @@ namespace lldb_private {
         
         SyntheticChildrenFrontEnd* NSDictionarySyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP);
         
+        class LibcxxVectorBoolSyntheticFrontEnd : public SyntheticChildrenFrontEnd
+        {
+        public:
+            LibcxxVectorBoolSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp);
+            
+            virtual size_t
+            CalculateNumChildren ();
+            
+            virtual lldb::ValueObjectSP
+            GetChildAtIndex (size_t idx);
+            
+            virtual bool
+            Update();
+            
+            virtual bool
+            MightHaveChildren ();
+            
+            virtual size_t
+            GetIndexOfChildWithName (const ConstString &name);
+            
+            virtual
+            ~LibcxxVectorBoolSyntheticFrontEnd ();
+        private:
+            ExecutionContextRef m_exe_ctx_ref;
+            uint64_t m_count;
+            lldb::addr_t m_base_data_address;
+            EvaluateExpressionOptions m_options;
+        };
+        
+        SyntheticChildrenFrontEnd* LibcxxVectorBoolSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP);
+        
+        class LibstdcppVectorBoolSyntheticFrontEnd : public SyntheticChildrenFrontEnd
+        {
+        public:
+            LibstdcppVectorBoolSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp);
+            
+            virtual size_t
+            CalculateNumChildren ();
+            
+            virtual lldb::ValueObjectSP
+            GetChildAtIndex (size_t idx);
+            
+            virtual bool
+            Update();
+            
+            virtual bool
+            MightHaveChildren ();
+            
+            virtual size_t
+            GetIndexOfChildWithName (const ConstString &name);
+            
+            virtual
+            ~LibstdcppVectorBoolSyntheticFrontEnd ();
+        private:
+            ExecutionContextRef m_exe_ctx_ref;
+            uint64_t m_count;
+            lldb::addr_t m_base_data_address;
+            EvaluateExpressionOptions m_options;
+        };
+        
+        SyntheticChildrenFrontEnd* LibstdcppVectorBoolSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP);
+
+        
     }
 }
 

lldb/source/DataFormatters/CXXFormatterFunctions.cpp

@@ -1787,6 +1787,322 @@ lldb_private::formatters::NSDictionaryMSyntheticFrontEnd::GetChildAtIndex (size_
     return dict_item.valobj_sp;
 }
 
+lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::LibcxxVectorBoolSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
+    SyntheticChildrenFrontEnd(*valobj_sp.get()),
+    m_exe_ctx_ref(),
+    m_count(0),
+    m_base_data_address(0),
+    m_options()
+    {
+        if (valobj_sp)
+            Update();
+        m_options.SetCoerceToId(false)
+                 .SetUnwindOnError(true)
+                 .SetKeepInMemory(true)
+                 .SetUseDynamic(lldb::eDynamicCanRunTarget);
+    }
+
+size_t
+lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::CalculateNumChildren ()
+{
+    return m_count;
+}
+
+lldb::ValueObjectSP
+lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::GetChildAtIndex (size_t idx)
+{
+    if (idx >= m_count)
+        return ValueObjectSP();
+    if (m_base_data_address == 0 || m_count == 0)
+        return ValueObjectSP();
+    size_t byte_idx = (idx >> 3); // divide by 8 to get byte index
+    size_t bit_index = (idx & 7); // efficient idx % 8 for bit index
+    lldb::addr_t byte_location = m_base_data_address + byte_idx;
+    ProcessSP process_sp(m_exe_ctx_ref.GetProcessSP());
+    if (!process_sp)
+        return ValueObjectSP();
+    uint8_t byte = 0;
+    uint8_t mask = 0;
+    Error err;
+    size_t bytes_read = process_sp->ReadMemory(byte_location, &byte, 1, err);
+    if (err.Fail() || bytes_read == 0)
+        return ValueObjectSP();
+    switch (bit_index)
+    {
+        case 0:
+            mask = 1; break;
+        case 1:
+            mask = 2; break;
+        case 2:
+            mask = 4; break;
+        case 3:
+            mask = 8; break;
+        case 4:
+            mask = 16; break;
+        case 5:
+            mask = 32; break;
+        case 6:
+            mask = 64; break;
+        case 7:
+            mask = 128; break;
+        default:
+            return ValueObjectSP();
+    }
+    bool bit_set = ((byte & mask) != 0);
+    Target& target(process_sp->GetTarget());
+    ValueObjectSP retval_sp;
+    if (bit_set)
+        target.EvaluateExpression("(bool)true", NULL, retval_sp);
+    else
+        target.EvaluateExpression("(bool)false", NULL, retval_sp);
+    StreamString name; name.Printf("[%zu]",idx);
+    if (retval_sp)
+        retval_sp->SetName(ConstString(name.GetData()));
+    return retval_sp;
+}
+
+/*(std::__1::vector<std::__1::allocator<bool> >) vBool = {
+    __begin_ = 0x00000001001000e0
+    __size_ = 56
+    __cap_alloc_ = {
+        std::__1::__libcpp_compressed_pair_imp<unsigned long, std::__1::allocator<unsigned long> > = {
+            __first_ = 1
+        }
+    }
+}*/
+
+bool
+lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::Update()
+{
+    ValueObjectSP valobj_sp = m_backend.GetSP();
+    if (!valobj_sp)
+        return false;
+    if (valobj_sp->IsDynamic())
+        valobj_sp = valobj_sp->GetStaticValue();
+    if (!valobj_sp)
+        return false;
+    m_exe_ctx_ref = valobj_sp->GetExecutionContextRef();
+    ValueObjectSP size_sp(valobj_sp->GetChildMemberWithName(ConstString("__size_"), true));
+    if (!size_sp)
+        return false;
+    m_count = size_sp->GetValueAsUnsigned(0);
+    if (!m_count)
+        return true;
+    ValueObjectSP begin_sp(valobj_sp->GetChildMemberWithName(ConstString("__begin_"), true));
+    if (!begin_sp)
+    {
+        m_count = 0;
+        return false;
+    }
+    m_base_data_address = begin_sp->GetValueAsUnsigned(0);
+    if (!m_base_data_address)
+    {
+        m_count = 0;
+        return false;
+    }
+    return true;
+}
+
+bool
+lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::MightHaveChildren ()
+{
+    return true;
+}
+
+size_t
+lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name)
+{
+    if (!m_count || !m_base_data_address)
+        return UINT32_MAX;
+    const char* item_name = name.GetCString();
+    uint32_t idx = ExtractIndexFromString(item_name);
+    if (idx < UINT32_MAX && idx >= CalculateNumChildren())
+        return UINT32_MAX;
+    return idx;
+}
+
+lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEnd::~LibcxxVectorBoolSyntheticFrontEnd ()
+{}
+
+SyntheticChildrenFrontEnd*
+lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
+{
+    if (!valobj_sp)
+        return NULL;
+    return (new LibcxxVectorBoolSyntheticFrontEnd(valobj_sp));
+}
+
+lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::LibstdcppVectorBoolSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
+SyntheticChildrenFrontEnd(*valobj_sp.get()),
+m_exe_ctx_ref(),
+m_count(0),
+m_base_data_address(0),
+m_options()
+{
+    if (valobj_sp)
+        Update();
+    m_options.SetCoerceToId(false)
+    .SetUnwindOnError(true)
+    .SetKeepInMemory(true)
+    .SetUseDynamic(lldb::eDynamicCanRunTarget);
+}
+
+size_t
+lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::CalculateNumChildren ()
+{
+    return m_count;
+}
+
+lldb::ValueObjectSP
+lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::GetChildAtIndex (size_t idx)
+{
+    if (idx >= m_count)
+        return ValueObjectSP();
+    if (m_base_data_address == 0 || m_count == 0)
+        return ValueObjectSP();
+    size_t byte_idx = (idx >> 3); // divide by 8 to get byte index
+    size_t bit_index = (idx & 7); // efficient idx % 8 for bit index
+    lldb::addr_t byte_location = m_base_data_address + byte_idx;
+    ProcessSP process_sp(m_exe_ctx_ref.GetProcessSP());
+    if (!process_sp)
+        return ValueObjectSP();
+    uint8_t byte = 0;
+    uint8_t mask = 0;
+    Error err;
+    size_t bytes_read = process_sp->ReadMemory(byte_location, &byte, 1, err);
+    if (err.Fail() || bytes_read == 0)
+        return ValueObjectSP();
+    switch (bit_index)
+    {
+        case 0:
+            mask = 1; break;
+        case 1:
+            mask = 2; break;
+        case 2:
+            mask = 4; break;
+        case 3:
+            mask = 8; break;
+        case 4:
+            mask = 16; break;
+        case 5:
+            mask = 32; break;
+        case 6:
+            mask = 64; break;
+        case 7:
+            mask = 128; break;
+        default:
+            return ValueObjectSP();
+    }
+    bool bit_set = ((byte & mask) != 0);
+    Target& target(process_sp->GetTarget());
+    ValueObjectSP retval_sp;
+    if (bit_set)
+        target.EvaluateExpression("(bool)true", NULL, retval_sp);
+    else
+        target.EvaluateExpression("(bool)false", NULL, retval_sp);
+    StreamString name; name.Printf("[%zu]",idx);
+    if (retval_sp)
+        retval_sp->SetName(ConstString(name.GetData()));
+    return retval_sp;
+}
+
+/*((std::vector<std::allocator<bool> >) vBool = {
+ (std::_Bvector_base<std::allocator<bool> >) std::_Bvector_base<std::allocator<bool> > = {
+ (std::_Bvector_base<std::allocator<bool> >::_Bvector_impl) _M_impl = {
+ (std::_Bit_iterator) _M_start = {
+ (std::_Bit_iterator_base) std::_Bit_iterator_base = {
+ (_Bit_type *) _M_p = 0x0016b160
+ (unsigned int) _M_offset = 0
+ }
+ }
+ (std::_Bit_iterator) _M_finish = {
+ (std::_Bit_iterator_base) std::_Bit_iterator_base = {
+ (_Bit_type *) _M_p = 0x0016b16c
+ (unsigned int) _M_offset = 16
+ }
+ }
+ (_Bit_type *) _M_end_of_storage = 0x0016b170
+ }
+ }
+ }
+*/
+
+bool
+lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::Update()
+{
+    ValueObjectSP valobj_sp = m_backend.GetSP();
+    if (!valobj_sp)
+        return false;
+    if (valobj_sp->IsDynamic())
+        valobj_sp = valobj_sp->GetStaticValue();
+    if (!valobj_sp)
+        return false;
+    m_exe_ctx_ref = valobj_sp->GetExecutionContextRef();
+    
+    ValueObjectSP m_impl_sp(valobj_sp->GetChildMemberWithName(ConstString("_M_impl"), true));
+    if (!m_impl_sp)
+        return false;
+    
+    ValueObjectSP m_start_sp(m_impl_sp->GetChildMemberWithName(ConstString("_M_start"), true));
+    ValueObjectSP m_finish_sp(m_impl_sp->GetChildMemberWithName(ConstString("_M_finish"), true));
+    
+    ValueObjectSP start_p_sp, finish_p_sp, finish_offset_sp;
+    
+    if (!m_start_sp || !m_finish_sp)
+        return false;
+    
+    start_p_sp = m_start_sp->GetChildMemberWithName(ConstString("_M_p"), true);
+    finish_p_sp = m_finish_sp->GetChildMemberWithName(ConstString("_M_p"), true);
+    finish_offset_sp = m_finish_sp->GetChildMemberWithName(ConstString("_M_offset"), true);
+    
+    if (!start_p_sp || !finish_offset_sp || !finish_p_sp)
+        return false;
+
+    m_base_data_address = start_p_sp->GetValueAsUnsigned(0);
+    if (!m_base_data_address)
+        return false;
+    
+    lldb::addr_t end_data_address(finish_p_sp->GetValueAsUnsigned(0));
+    if (!end_data_address)
+        return false;
+    
+    if (end_data_address < m_base_data_address)
+        return false;
+    else
+        m_count = finish_offset_sp->GetValueAsUnsigned(0) + (end_data_address-m_base_data_address)*8;
+
+    return true;
+}
+
+bool
+lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::MightHaveChildren ()
+{
+    return true;
+}
+
+size_t
+lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name)
+{
+    if (!m_count || !m_base_data_address)
+        return UINT32_MAX;
+    const char* item_name = name.GetCString();
+    uint32_t idx = ExtractIndexFromString(item_name);
+    if (idx < UINT32_MAX && idx >= CalculateNumChildren())
+        return UINT32_MAX;
+    return idx;
+}
+
+lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEnd::~LibstdcppVectorBoolSyntheticFrontEnd ()
+{}
+
+SyntheticChildrenFrontEnd*
+lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
+{
+    if (!valobj_sp)
+        return NULL;
+    return (new LibstdcppVectorBoolSyntheticFrontEnd(valobj_sp));
+}
+
 template bool
 lldb_private::formatters::NSDictionarySummaryProvider<true> (ValueObject&, Stream&) ;
 

lldb/source/DataFormatters/FormatManager.cpp

@@ -561,6 +561,13 @@ FormatManager::LoadLibStdcppFormatters()
     gnu_category_sp->GetRegexSummaryNavigator()->Add(RegularExpressionSP(new RegularExpression("^std::list<.+>(( )?&)?$")),
                                                      TypeSummaryImplSP(new StringSummaryFormat(stl_summary_flags,
                                                                                                "size=${svar%#}")));
+    
+    gnu_category_sp->GetSummaryNavigator()->Add(ConstString("std::vector<std::allocator<bool> >"),
+                                                   TypeSummaryImplSP(new StringSummaryFormat(stl_summary_flags, "size=${svar%#}")));
+    
+    gnu_category_sp->GetSyntheticNavigator()->Add(ConstString("std::vector<std::allocator<bool> >"),
+                                                     SyntheticChildrenSP(new CXXSyntheticChildren(stl_synth_flags,"libc++ std::vector<bool> synthetic children",lldb_private::formatters::LibstdcppVectorBoolSyntheticFrontEndCreator)));
+
 #endif
 }
 
@@ -633,7 +640,10 @@ FormatManager::LoadLibcxxFormatters()
     
     // this summary prevails on the regex std::vector<> because we do exact matches before regex ones
     libcxx_category_sp->GetSummaryNavigator()->Add(ConstString("std::__1::vector<std::__1::allocator<bool> >"),
-                                                   TypeSummaryImplSP(new StringSummaryFormat(stl_summary_flags, "size=${var.__size_}")));
+                                                   TypeSummaryImplSP(new StringSummaryFormat(stl_summary_flags, "size=${svar%#}")));
+    
+    libcxx_category_sp->GetSyntheticNavigator()->Add(ConstString("std::__1::vector<std::__1::allocator<bool> >"),
+                                                     SyntheticChildrenSP(new CXXSyntheticChildren(stl_synth_flags,"libc++ std::vector<bool> synthetic children",lldb_private::formatters::LibcxxVectorBoolSyntheticFrontEndCreator)));
 
 #endif
 }

lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/vbool/Makefile

@@ -0,0 +1,8 @@
+LEVEL = ../../../../../make
+
+CXX_SOURCES := main.cpp
+
+include $(LEVEL)/Makefile.rules
+
+CXXFLAGS += -stdlib=libc++ -O0
+LDFLAGS += -stdlib=libc++

lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/vbool/TestDataFormatterLibcxxVBool.py

@@ -0,0 +1,70 @@
+"""
+Test lldb data formatter subsystem.
+"""
+
+import os, time
+import unittest2
+import lldb
+from lldbtest import *
+import lldbutil
+
+class LibcxxVBoolDataFormatterTestCase(TestBase):
+
+    mydir = os.path.join("functionalities", "data-formatter", "data-formatter-stl", "libcxx", "vbool")
+
+    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @dsym_test
+    def test_with_dsym_and_run_command(self):
+        """Test data formatter commands."""
+        self.buildDsym()
+        self.data_formatter_commands()
+
+    @skipOnLinux # No standard locations for libc++ on Linux, so skip for now 
+    @dwarf_test
+    def test_with_dwarf_and_run_command(self):
+        """Test data formatter commands."""
+        self.buildDwarf()
+        self.data_formatter_commands()
+
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+        # Find the line number to break at.
+        self.line = line_number('main.cpp', '// Set break point at this line.')
+
+    def data_formatter_commands(self):
+        """Test that that file and class static variables display correctly."""
+        self.runCmd("file a.out", CURRENT_EXECUTABLE_SET)
+
+        lldbutil.run_break_set_by_file_and_line (self, "main.cpp", self.line, num_expected_locations=-1)
+
+        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'])
+
+        # This is the function to remove the custom formats in order to have a
+        # clean slate for the next test case.
+        def cleanup():
+            self.runCmd('type format clear', check=False)
+            self.runCmd('type summary clear', check=False)
+            self.runCmd('type filter clear', check=False)
+            self.runCmd('type synth clear', check=False)
+            self.runCmd("settings set target.max-children-count 256", check=False)
+
+        # Execute the cleanup function during test case tear down.
+        self.addTearDownHook(cleanup)
+
+        self.expect("frame variable vBool",
+            substrs = ['size=49','[0] = false','[1] = true','[18] = false','[27] = true','[36] = false','[47] = true','[48] = true'])
+
+        self.expect("expr vBool",
+            substrs = ['size=49','[0] = false','[1] = true','[18] = false','[27] = true','[36] = false','[47] = true','[48] = true'])
+
+if __name__ == '__main__':
+    import atexit
+    lldb.SBDebugger.Initialize()
+    atexit.register(lambda: lldb.SBDebugger.Terminate())
+    unittest2.main()

lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/vbool/main.cpp

@@ -0,0 +1,69 @@
+#include <string>
+#ifdef _LIBCPP_INLINE_VISIBILITY
+#undef _LIBCPP_INLINE_VISIBILITY
+#endif
+#define _LIBCPP_INLINE_VISIBILITY
+
+#include <vector>
+
+int main()
+{
+    std::vector<bool> vBool;
+
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(true);
+
+    return 0; // Set break point at this line.
+}

lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/vbool/Makefile

@@ -0,0 +1,5 @@
+LEVEL = ../../../../../make
+
+CXX_SOURCES := main.cpp
+
+include $(LEVEL)/Makefile.rules

lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/vbool/TestDataFormatterStdVBool.py

@@ -0,0 +1,69 @@
+"""
+Test lldb data formatter subsystem.
+"""
+
+import os, time
+import unittest2
+import lldb
+from lldbtest import *
+import lldbutil
+
+class StdVBoolDataFormatterTestCase(TestBase):
+
+    mydir = os.path.join("functionalities", "data-formatter", "data-formatter-stl", "libstdcpp", "vbool")
+
+    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @dsym_test
+    def test_with_dsym_and_run_command(self):
+        """Test data formatter commands."""
+        self.buildDsym()
+        self.data_formatter_commands()
+
+    @dwarf_test
+    def test_with_dwarf_and_run_command(self):
+        """Test data formatter commands."""
+        self.buildDwarf()
+        self.data_formatter_commands()
+
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+        # Find the line number to break at.
+        self.line = line_number('main.cpp', '// Set break point at this line.')
+
+    def data_formatter_commands(self):
+        """Test that that file and class static variables display correctly."""
+        self.runCmd("file a.out", CURRENT_EXECUTABLE_SET)
+
+        lldbutil.run_break_set_by_file_and_line (self, "main.cpp", self.line, num_expected_locations=-1)
+
+        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'])
+
+        # This is the function to remove the custom formats in order to have a
+        # clean slate for the next test case.
+        def cleanup():
+            self.runCmd('type format clear', check=False)
+            self.runCmd('type summary clear', check=False)
+            self.runCmd('type filter clear', check=False)
+            self.runCmd('type synth clear', check=False)
+            self.runCmd("settings set target.max-children-count 256", check=False)
+
+        # Execute the cleanup function during test case tear down.
+        self.addTearDownHook(cleanup)
+
+        self.expect("frame variable vBool",
+            substrs = ['size=49','[0] = false','[1] = true','[18] = false','[27] = true','[36] = false','[47] = true','[48] = true'])
+
+        self.expect("expr vBool",
+            substrs = ['size=49','[0] = false','[1] = true','[18] = false','[27] = true','[36] = false','[47] = true','[48] = true'])
+
+if __name__ == '__main__':
+    import atexit
+    lldb.SBDebugger.Initialize()
+    atexit.register(lambda: lldb.SBDebugger.Terminate())
+    unittest2.main()

lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/vbool/main.cpp

@@ -0,0 +1,63 @@
+#include <vector>
+
+int main()
+{
+    std::vector<bool> vBool;
+
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(false);
+    vBool.push_back(true);
+    vBool.push_back(true);
+
+    return 0; // Set break point at this line.
+}