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clang-p2996/lldb/source/DataFormatters/NSDictionary.cpp
Greg Clayton 57ee306789 Huge change to clean up types. 
A long time ago we start with clang types that were created by the symbol files and there were many functions in lldb_private::ClangASTContext that helped. Later we create ClangASTType which contains a clang::ASTContext and an opauque QualType, but we didn't switch over to fully using it. There were a lot of places where we would pass around a raw clang_type_t and also pass along a clang::ASTContext separately. This left room for error.

This checkin change all type code over to use ClangASTType everywhere and I cleaned up the interfaces quite a bit. Any code that was in ClangASTContext that was type related, was moved over into ClangASTType. All code that used these types was switched over to use all of the new goodness.

llvm-svn: 186130
2013-07-11 22:46:58 +00:00

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//===-- NSDictionary.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"
#include "clang/AST/DeclCXX.h"
using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::formatters;
static ClangASTType
GetLLDBNSPairType (TargetSP target_sp)
{
ClangASTType clang_type;
ClangASTContext *target_ast_context = target_sp->GetScratchClangASTContext();
if (target_ast_context)
{
clang::ASTContext *ast = target_ast_context->getASTContext();
if (ast)
{
const char* type_name = "__lldb_autogen_nspair";
clang::IdentifierInfo &myIdent = ast->Idents.get(type_name);
clang::DeclarationName myName = ast->DeclarationNames.getIdentifier(&myIdent);
clang::DeclContext::lookup_const_result result = ast->getTranslationUnitDecl()->lookup(myName);
for (clang::NamedDecl *named_decl : result)
{
if (const clang::CXXRecordDecl *record_decl = llvm::dyn_cast<clang::CXXRecordDecl>(named_decl))
{
clang_type.SetClangType(ast, clang::QualType(record_decl->getTypeForDecl(), 0));
break;
}
else
{
// somebody else (the user?) has defined a type with the magic name already - fail!!!
return clang_type;
}
}
if (!clang_type)
{
clang_type = target_ast_context->CreateRecordType(NULL, lldb::eAccessPublic, type_name, clang::TTK_Struct, lldb::eLanguageTypeC);
if (clang_type)
{
clang_type.StartTagDeclarationDefinition();
ClangASTType id_clang_type = target_ast_context->GetBasicType (eBasicTypeObjCID);
clang_type.AddFieldToRecordType("key", id_clang_type, lldb::eAccessPublic, 0);
clang_type.AddFieldToRecordType("value", id_clang_type, lldb::eAccessPublic, 0);
clang_type.CompleteTagDeclarationDefinition();
}
}
}
}
return clang_type;
}
template<bool name_entries>
bool
lldb_private::formatters::NSDictionarySummaryProvider (ValueObject& valobj, Stream& stream)
{
ProcessSP process_sp = valobj.GetProcessSP();
if (!process_sp)
return false;
ObjCLanguageRuntime* runtime = (ObjCLanguageRuntime*)process_sp->GetLanguageRuntime(lldb::eLanguageTypeObjC);
if (!runtime)
return false;
ObjCLanguageRuntime::ClassDescriptorSP descriptor(runtime->GetClassDescriptor(valobj));
if (!descriptor.get() || !descriptor->IsValid())
return false;
uint32_t ptr_size = process_sp->GetAddressByteSize();
bool is_64bit = (ptr_size == 8);
lldb::addr_t valobj_addr = valobj.GetValueAsUnsigned(0);
if (!valobj_addr)
return false;
uint64_t value = 0;
const char* class_name = descriptor->GetClassName().GetCString();
if (!class_name || !*class_name)
return false;
if (!strcmp(class_name,"__NSDictionaryI"))
{
Error error;
value = process_sp->ReadUnsignedIntegerFromMemory(valobj_addr + ptr_size, ptr_size, 0, error);
if (error.Fail())
return false;
value &= (is_64bit ? ~0xFC00000000000000UL : ~0xFC000000U);
}
else if (!strcmp(class_name,"__NSDictionaryM"))
{
Error error;
value = process_sp->ReadUnsignedIntegerFromMemory(valobj_addr + ptr_size, ptr_size, 0, error);
if (error.Fail())
return false;
value &= (is_64bit ? ~0xFC00000000000000UL : ~0xFC000000U);
}
/*else if (!strcmp(class_name,"__NSCFDictionary"))
{
Error error;
value = process_sp->ReadUnsignedIntegerFromMemory(valobj_addr + (is_64bit ? 20 : 12), 4, 0, error);
if (error.Fail())
return false;
if (is_64bit)
value &= ~0x0f1f000000000000UL;
}*/
else
{
if (!ExtractValueFromObjCExpression(valobj, "int", "count", value))
return false;
}
stream.Printf("%s%" PRIu64 " %s%s",
(name_entries ? "@\"" : ""),
value,
(name_entries ? (value == 1 ? "entry" : "entries") : (value == 1 ? "key/value pair" : "key/value pairs")),
(name_entries ? "\"" : ""));
return true;
}
SyntheticChildrenFrontEnd* lldb_private::formatters::NSDictionarySyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
{
lldb::ProcessSP process_sp (valobj_sp->GetProcessSP());
if (!process_sp)
return NULL;
ObjCLanguageRuntime *runtime = (ObjCLanguageRuntime*)process_sp->GetLanguageRuntime(lldb::eLanguageTypeObjC);
if (!runtime)
return NULL;
if (!valobj_sp->IsPointerType())
{
Error error;
valobj_sp = valobj_sp->AddressOf(error);
if (error.Fail() || !valobj_sp)
return NULL;
}
ObjCLanguageRuntime::ClassDescriptorSP descriptor(runtime->GetClassDescriptor(*valobj_sp.get()));
if (!descriptor.get() || !descriptor->IsValid())
return NULL;
const char* class_name = descriptor->GetClassName().GetCString();
if (!class_name || !*class_name)
return NULL;
if (!strcmp(class_name,"__NSDictionaryI"))
{
return (new NSDictionaryISyntheticFrontEnd(valobj_sp));
}
else if (!strcmp(class_name,"__NSDictionaryM"))
{
return (new NSDictionaryMSyntheticFrontEnd(valobj_sp));
}
else
{
return (new NSDictionaryCodeRunningSyntheticFrontEnd(valobj_sp));
}
}
lldb_private::formatters::NSDictionaryCodeRunningSyntheticFrontEnd::NSDictionaryCodeRunningSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
SyntheticChildrenFrontEnd(*valobj_sp.get())
{}
size_t
lldb_private::formatters::NSDictionaryCodeRunningSyntheticFrontEnd::CalculateNumChildren ()
{
uint64_t count = 0;
if (ExtractValueFromObjCExpression(m_backend, "int", "count", count))
return count;
return 0;
}
lldb::ValueObjectSP
lldb_private::formatters::NSDictionaryCodeRunningSyntheticFrontEnd::GetChildAtIndex (size_t idx)
{
StreamString idx_name;
idx_name.Printf("[%zu]",idx);
StreamString key_fetcher_expr;
key_fetcher_expr.Printf("(id)[(NSArray*)[(id)0x%" PRIx64 " allKeys] objectAtIndex:%zu]",m_backend.GetPointerValue(),idx);
StreamString value_fetcher_expr;
value_fetcher_expr.Printf("(id)[(id)0x%" PRIx64 " objectForKey:(%s)]",m_backend.GetPointerValue(),key_fetcher_expr.GetData());
StreamString object_fetcher_expr;
object_fetcher_expr.Printf("struct __lldb_autogen_nspair { id key; id value; } _lldb_valgen_item; _lldb_valgen_item.key = %s; _lldb_valgen_item.value = %s; _lldb_valgen_item;",key_fetcher_expr.GetData(),value_fetcher_expr.GetData());
lldb::ValueObjectSP child_sp;
m_backend.GetTargetSP()->EvaluateExpression(object_fetcher_expr.GetData(), m_backend.GetFrameSP().get(), child_sp,
EvaluateExpressionOptions().SetKeepInMemory(true));
if (child_sp)
child_sp->SetName(ConstString(idx_name.GetData()));
return child_sp;
}
bool
lldb_private::formatters::NSDictionaryCodeRunningSyntheticFrontEnd::Update()
{
return false;
}
bool
lldb_private::formatters::NSDictionaryCodeRunningSyntheticFrontEnd::MightHaveChildren ()
{
return true;
}
size_t
lldb_private::formatters::NSDictionaryCodeRunningSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name)
{
return 0;
}
lldb_private::formatters::NSDictionaryCodeRunningSyntheticFrontEnd::~NSDictionaryCodeRunningSyntheticFrontEnd ()
{}
lldb_private::formatters::NSDictionaryISyntheticFrontEnd::NSDictionaryISyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
SyntheticChildrenFrontEnd(*valobj_sp.get()),
m_exe_ctx_ref(),
m_ptr_size(8),
m_order(lldb::eByteOrderInvalid),
m_data_32(NULL),
m_data_64(NULL),
m_pair_type()
{
}
lldb_private::formatters::NSDictionaryISyntheticFrontEnd::~NSDictionaryISyntheticFrontEnd ()
{
delete m_data_32;
m_data_32 = NULL;
delete m_data_64;
m_data_64 = NULL;
}
size_t
lldb_private::formatters::NSDictionaryISyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name)
{
const char* item_name = name.GetCString();
uint32_t idx = ExtractIndexFromString(item_name);
if (idx < UINT32_MAX && idx >= CalculateNumChildren())
return UINT32_MAX;
return idx;
}
size_t
lldb_private::formatters::NSDictionaryISyntheticFrontEnd::CalculateNumChildren ()
{
if (!m_data_32 && !m_data_64)
return 0;
return (m_data_32 ? m_data_32->_used : m_data_64->_used);
}
bool
lldb_private::formatters::NSDictionaryISyntheticFrontEnd::Update()
{
m_children.clear();
delete m_data_32;
m_data_32 = NULL;
delete m_data_64;
m_data_64 = NULL;
m_ptr_size = 0;
ValueObjectSP valobj_sp = m_backend.GetSP();
if (!valobj_sp)
return false;
m_exe_ctx_ref = valobj_sp->GetExecutionContextRef();
Error error;
error.Clear();
lldb::ProcessSP process_sp(valobj_sp->GetProcessSP());
if (!process_sp)
return false;
m_ptr_size = process_sp->GetAddressByteSize();
m_order = process_sp->GetByteOrder();
uint64_t data_location = valobj_sp->GetValueAsUnsigned(0) + m_ptr_size;
if (m_ptr_size == 4)
{
m_data_32 = new DataDescriptor_32();
process_sp->ReadMemory (data_location, m_data_32, sizeof(DataDescriptor_32), error);
}
else
{
m_data_64 = new DataDescriptor_64();
process_sp->ReadMemory (data_location, m_data_64, sizeof(DataDescriptor_64), error);
}
if (error.Fail())
return false;
m_data_ptr = data_location + m_ptr_size;
return false;
}
bool
lldb_private::formatters::NSDictionaryISyntheticFrontEnd::MightHaveChildren ()
{
return true;
}
lldb::ValueObjectSP
lldb_private::formatters::NSDictionaryISyntheticFrontEnd::GetChildAtIndex (size_t idx)
{
uint32_t num_children = CalculateNumChildren();
if (idx >= num_children)
return lldb::ValueObjectSP();
if (m_children.empty())
{
// do the scan phase
lldb::addr_t key_at_idx = 0, val_at_idx = 0;
uint32_t tries = 0;
uint32_t test_idx = 0;
while(tries < num_children)
{
key_at_idx = m_data_ptr + (2*test_idx * m_ptr_size);
val_at_idx = key_at_idx + m_ptr_size;
ProcessSP process_sp = m_exe_ctx_ref.GetProcessSP();
if (!process_sp)
return lldb::ValueObjectSP();
Error error;
key_at_idx = process_sp->ReadPointerFromMemory(key_at_idx, error);
if (error.Fail())
return lldb::ValueObjectSP();
val_at_idx = process_sp->ReadPointerFromMemory(val_at_idx, error);
if (error.Fail())
return lldb::ValueObjectSP();
test_idx++;
if (!key_at_idx || !val_at_idx)
continue;
tries++;
DictionaryItemDescriptor descriptor = {key_at_idx,val_at_idx,lldb::ValueObjectSP()};
m_children.push_back(descriptor);
}
}
if (idx >= m_children.size()) // should never happen
return lldb::ValueObjectSP();
DictionaryItemDescriptor &dict_item = m_children[idx];
if (!dict_item.valobj_sp)
{
if (!m_pair_type.IsValid())
{
TargetSP target_sp(m_backend.GetTargetSP());
if (!target_sp)
return ValueObjectSP();
m_pair_type = GetLLDBNSPairType(target_sp);
}
if (!m_pair_type.IsValid())
return ValueObjectSP();
DataBufferSP buffer_sp(new DataBufferHeap(2*m_ptr_size,0));
if (m_ptr_size == 8)
{
uint64_t *data_ptr = (uint64_t *)buffer_sp->GetBytes();
*data_ptr = dict_item.key_ptr;
*(data_ptr+1) = dict_item.val_ptr;
}
else
{
uint32_t *data_ptr = (uint32_t *)buffer_sp->GetBytes();
*data_ptr = dict_item.key_ptr;
*(data_ptr+1) = dict_item.val_ptr;
}
StreamString idx_name;
idx_name.Printf("[%zu]",idx);
DataExtractor data(buffer_sp, m_order, m_ptr_size);
dict_item.valobj_sp = ValueObject::CreateValueObjectFromData(idx_name.GetData(), data, m_exe_ctx_ref, m_pair_type);
}
return dict_item.valobj_sp;
}
lldb_private::formatters::NSDictionaryMSyntheticFrontEnd::NSDictionaryMSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
SyntheticChildrenFrontEnd(*valobj_sp.get()),
m_exe_ctx_ref(),
m_ptr_size(8),
m_order(lldb::eByteOrderInvalid),
m_data_32(NULL),
m_data_64(NULL),
m_pair_type()
{
}
lldb_private::formatters::NSDictionaryMSyntheticFrontEnd::~NSDictionaryMSyntheticFrontEnd ()
{
delete m_data_32;
m_data_32 = NULL;
delete m_data_64;
m_data_64 = NULL;
}
size_t
lldb_private::formatters::NSDictionaryMSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name)
{
const char* item_name = name.GetCString();
uint32_t idx = ExtractIndexFromString(item_name);
if (idx < UINT32_MAX && idx >= CalculateNumChildren())
return UINT32_MAX;
return idx;
}
size_t
lldb_private::formatters::NSDictionaryMSyntheticFrontEnd::CalculateNumChildren ()
{
if (!m_data_32 && !m_data_64)
return 0;
return (m_data_32 ? m_data_32->_used : m_data_64->_used);
}
bool
lldb_private::formatters::NSDictionaryMSyntheticFrontEnd::Update()
{
m_children.clear();
ValueObjectSP valobj_sp = m_backend.GetSP();
m_ptr_size = 0;
delete m_data_32;
m_data_32 = NULL;
delete m_data_64;
m_data_64 = NULL;
if (!valobj_sp)
return false;
m_exe_ctx_ref = valobj_sp->GetExecutionContextRef();
Error error;
error.Clear();
lldb::ProcessSP process_sp(valobj_sp->GetProcessSP());
if (!process_sp)
return false;
m_ptr_size = process_sp->GetAddressByteSize();
m_order = process_sp->GetByteOrder();
uint64_t data_location = valobj_sp->GetValueAsUnsigned(0) + m_ptr_size;
if (m_ptr_size == 4)
{
m_data_32 = new DataDescriptor_32();
process_sp->ReadMemory (data_location, m_data_32, sizeof(DataDescriptor_32), error);
}
else
{
m_data_64 = new DataDescriptor_64();
process_sp->ReadMemory (data_location, m_data_64, sizeof(DataDescriptor_64), error);
}
if (error.Fail())
return false;
return false;
}
bool
lldb_private::formatters::NSDictionaryMSyntheticFrontEnd::MightHaveChildren ()
{
return true;
}
lldb::ValueObjectSP
lldb_private::formatters::NSDictionaryMSyntheticFrontEnd::GetChildAtIndex (size_t idx)
{
lldb::addr_t m_keys_ptr = (m_data_32 ? m_data_32->_keys_addr : m_data_64->_keys_addr);
lldb::addr_t m_values_ptr = (m_data_32 ? m_data_32->_objs_addr : m_data_64->_objs_addr);
uint32_t num_children = CalculateNumChildren();
if (idx >= num_children)
return lldb::ValueObjectSP();
if (m_children.empty())
{
// do the scan phase
lldb::addr_t key_at_idx = 0, val_at_idx = 0;
uint32_t tries = 0;
uint32_t test_idx = 0;
while(tries < num_children)
{
key_at_idx = m_keys_ptr + (test_idx * m_ptr_size);
val_at_idx = m_values_ptr + (test_idx * m_ptr_size);;
ProcessSP process_sp = m_exe_ctx_ref.GetProcessSP();
if (!process_sp)
return lldb::ValueObjectSP();
Error error;
key_at_idx = process_sp->ReadPointerFromMemory(key_at_idx, error);
if (error.Fail())
return lldb::ValueObjectSP();
val_at_idx = process_sp->ReadPointerFromMemory(val_at_idx, error);
if (error.Fail())
return lldb::ValueObjectSP();
test_idx++;
if (!key_at_idx || !val_at_idx)
continue;
tries++;
DictionaryItemDescriptor descriptor = {key_at_idx,val_at_idx,lldb::ValueObjectSP()};
m_children.push_back(descriptor);
}
}
if (idx >= m_children.size()) // should never happen
return lldb::ValueObjectSP();
DictionaryItemDescriptor &dict_item = m_children[idx];
if (!dict_item.valobj_sp)
{
if (!m_pair_type.IsValid())
{
TargetSP target_sp(m_backend.GetTargetSP());
if (!target_sp)
return ValueObjectSP();
m_pair_type = GetLLDBNSPairType(target_sp);
}
if (!m_pair_type.IsValid())
return ValueObjectSP();
DataBufferSP buffer_sp(new DataBufferHeap(2*m_ptr_size,0));
if (m_ptr_size == 8)
{
uint64_t *data_ptr = (uint64_t *)buffer_sp->GetBytes();
*data_ptr = dict_item.key_ptr;
*(data_ptr+1) = dict_item.val_ptr;
}
else
{
uint32_t *data_ptr = (uint32_t *)buffer_sp->GetBytes();
*data_ptr = dict_item.key_ptr;
*(data_ptr+1) = dict_item.val_ptr;
}
StreamString idx_name;
idx_name.Printf("[%zu]",idx);
DataExtractor data(buffer_sp, m_order, m_ptr_size);
dict_item.valobj_sp = ValueObject::CreateValueObjectFromData(idx_name.GetData(), data, m_exe_ctx_ref, m_pair_type);
}
return dict_item.valobj_sp;
}
template bool
lldb_private::formatters::NSDictionarySummaryProvider<true> (ValueObject&, Stream&) ;
template bool
lldb_private::formatters::NSDictionarySummaryProvider<false> (ValueObject&, Stream&) ;
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