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llvm-project/lldb/source/DataFormatters/LibStdcpp.cpp

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//===-- LibStdcpp.cpp ---------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/lldb-python.h"
#include "lldb/DataFormatters/CXXFormatterFunctions.h"
#include "lldb/Core/DataBufferHeap.h"
#include "lldb/Core/Error.h"
#include "lldb/Core/Stream.h"
#include "lldb/Core/ValueObject.h"
#include "lldb/Core/ValueObjectConstResult.h"
#include "lldb/Host/Endian.h"
#include "lldb/Symbol/ClangASTContext.h"
#include "lldb/Target/ObjCLanguageRuntime.h"
#include "lldb/Target/Target.h"
using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::formatters;
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)
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));
}
/*
(std::_Rb_tree_iterator<std::pair<const int, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >) ibeg = {
(_Base_ptr) _M_node = 0x0000000100103910 {
(std::_Rb_tree_color) _M_color = _S_black
(std::_Rb_tree_node_base::_Base_ptr) _M_parent = 0x00000001001038c0
(std::_Rb_tree_node_base::_Base_ptr) _M_left = 0x0000000000000000
(std::_Rb_tree_node_base::_Base_ptr) _M_right = 0x0000000000000000
}
}
*/
lldb_private::formatters::LibstdcppMapIteratorSyntheticFrontEnd::LibstdcppMapIteratorSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
SyntheticChildrenFrontEnd(*valobj_sp.get()),
m_exe_ctx_ref(),
m_pair_address(0),
m_pair_type(),
m_options(),
m_pair_sp()
{
if (valobj_sp)
Update();
m_options.SetCoerceToId(false)
.SetUnwindOnError(true)
.SetKeepInMemory(true)
.SetUseDynamic(lldb::eDynamicCanRunTarget);
}
bool
lldb_private::formatters::LibstdcppMapIteratorSyntheticFrontEnd::Update()
{
ValueObjectSP valobj_sp = m_backend.GetSP();
if (!valobj_sp)
return false;
TargetSP target_sp(valobj_sp->GetTargetSP());
if (!target_sp)
return false;
bool is_64bit = (target_sp->GetArchitecture().GetAddressByteSize() == 8);
if (!valobj_sp)
return false;
m_exe_ctx_ref = valobj_sp->GetExecutionContextRef();
ValueObjectSP _M_node_sp(valobj_sp->GetChildMemberWithName(ConstString("_M_node"), true));
if (!_M_node_sp)
return false;
m_pair_address = _M_node_sp->GetValueAsUnsigned(0);
if (m_pair_address == 0)
return false;
m_pair_address += (is_64bit ? 32 : 16);
ClangASTType my_type(valobj_sp->GetClangAST(),valobj_sp->GetClangType());
if (ClangASTContext::GetNumTemplateArguments(valobj_sp->GetClangAST(),valobj_sp->GetClangType()) >= 1)
{
TemplateArgumentKind kind;
clang_type_t pair_type = ClangASTContext::GetTemplateArgument(valobj_sp->GetClangAST(),valobj_sp->GetClangType(), 0, kind);
if (kind != eTemplateArgumentKindType && kind != eTemplateArgumentKindTemplate && kind != eTemplateArgumentKindTemplateExpansion)
return false;
m_pair_type = ClangASTType(valobj_sp->GetClangAST(),pair_type);
}
else
return false;
return true;
}
size_t
lldb_private::formatters::LibstdcppMapIteratorSyntheticFrontEnd::CalculateNumChildren ()
{
return 2;
}
lldb::ValueObjectSP
lldb_private::formatters::LibstdcppMapIteratorSyntheticFrontEnd::GetChildAtIndex (size_t idx)
{
if (m_pair_address == 0)
return lldb::ValueObjectSP();
if (m_pair_type.GetASTContext() == NULL ||
m_pair_type.GetOpaqueQualType() == NULL)
return lldb::ValueObjectSP();
if (!m_pair_sp)
m_pair_sp = ValueObject::CreateValueObjectFromAddress("pair", m_pair_address, m_exe_ctx_ref, m_pair_type);
if (m_pair_sp)
return m_pair_sp->GetChildAtIndex(idx, true);
return lldb::ValueObjectSP();
}
bool
lldb_private::formatters::LibstdcppMapIteratorSyntheticFrontEnd::MightHaveChildren ()
{
return true;
}
size_t
lldb_private::formatters::LibstdcppMapIteratorSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name)
{
if (name == ConstString("first"))
return 0;
if (name == ConstString("second"))
return 1;
return UINT32_MAX;
}
lldb_private::formatters::LibstdcppMapIteratorSyntheticFrontEnd::~LibstdcppMapIteratorSyntheticFrontEnd ()
{}
SyntheticChildrenFrontEnd*
lldb_private::formatters::LibstdcppMapIteratorSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
{
if (!valobj_sp)
return NULL;
return (new LibstdcppMapIteratorSyntheticFrontEnd(valobj_sp));
}
/*
(lldb) fr var ibeg --ptr-depth 1
(__gnu_cxx::__normal_iterator<int *, std::vector<int, std::allocator<int> > >) ibeg = {
_M_current = 0x00000001001037a0 {
*_M_current = 1
}
}
*/
SyntheticChildrenFrontEnd*
lldb_private::formatters::LibStdcppVectorIteratorSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
{
static ConstString g_item_name;
if (!g_item_name)
g_item_name.SetCString("_M_current");
if (!valobj_sp)
return NULL;
return (new VectorIteratorSyntheticFrontEnd(valobj_sp,g_item_name));
}
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