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

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//===-- NSSet.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/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;
template<bool cf_style>
bool
lldb_private::formatters::NSSetSummaryProvider (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,"__NSSetI"))
{
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,"__NSSetM"))
{
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,"__NSCFSet"))
{
Error error;
value = process_sp->ReadUnsignedIntegerFromMemory(valobj_addr + (is_64bit ? 20 : 12), ptr_size, 0, error);
if (error.Fail())
return false;
if (is_64bit)
value &= ~0x1fff000000000000UL;
}
else if (!strcmp(class_name,"NSCountedSet"))
{
Error error;
value = process_sp->ReadUnsignedIntegerFromMemory(valobj_addr + ptr_size, ptr_size, 0, error);
if (error.Fail())
return false;
value = process_sp->ReadUnsignedIntegerFromMemory(value + (is_64bit ? 20 : 12), ptr_size, 0, error);
if (error.Fail())
return false;
if (is_64bit)
value &= ~0x1fff000000000000UL;
}
else
{
if (!ExtractValueFromObjCExpression(valobj, "int", "count", value))
return false;
}
stream.Printf("%s%" PRIu64 " %s%s",
(cf_style ? "@\"" : ""),
value,
(cf_style ? (value == 1 ? "value" : "values") : (value == 1 ? "object" : "objects")),
(cf_style ? "\"" : ""));
return true;
}
SyntheticChildrenFrontEnd* lldb_private::formatters::NSSetSyntheticFrontEndCreator (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,"__NSSetI"))
{
return (new NSSetISyntheticFrontEnd(valobj_sp));
}
else if (!strcmp(class_name,"__NSSetM"))
{
return (new NSSetMSyntheticFrontEnd(valobj_sp));
}
else
{
return /*(new NSSetCodeRunningSyntheticFrontEnd(valobj_sp))*/ NULL;
}
}
lldb_private::formatters::NSSetISyntheticFrontEnd::NSSetISyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
SyntheticChildrenFrontEnd(*valobj_sp.get()),
m_exe_ctx_ref(),
m_ptr_size(8),
m_data_32(NULL),
m_data_64(NULL)
{
if (valobj_sp)
Update();
}
lldb_private::formatters::NSSetISyntheticFrontEnd::~NSSetISyntheticFrontEnd ()
{
delete m_data_32;
m_data_32 = NULL;
delete m_data_64;
m_data_64 = NULL;
}
size_t
lldb_private::formatters::NSSetISyntheticFrontEnd::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::NSSetISyntheticFrontEnd::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::NSSetISyntheticFrontEnd::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;
if (!valobj_sp)
return false;
m_exe_ctx_ref = valobj_sp->GetExecutionContextRef();
Error error;
if (valobj_sp->IsPointerType())
{
valobj_sp = valobj_sp->Dereference(error);
if (error.Fail() || !valobj_sp)
return false;
}
error.Clear();
lldb::ProcessSP process_sp(valobj_sp->GetProcessSP());
if (!process_sp)
return false;
m_ptr_size = process_sp->GetAddressByteSize();
uint64_t data_location = valobj_sp->GetAddressOf() + 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::NSSetISyntheticFrontEnd::MightHaveChildren ()
{
return true;
}
lldb::ValueObjectSP
lldb_private::formatters::NSSetISyntheticFrontEnd::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 obj_at_idx = 0;
uint32_t tries = 0;
uint32_t test_idx = 0;
while(tries < num_children)
{
obj_at_idx = m_data_ptr + (test_idx * m_ptr_size);
ProcessSP process_sp = m_exe_ctx_ref.GetProcessSP();
if (!process_sp)
return lldb::ValueObjectSP();
Error error;
obj_at_idx = process_sp->ReadPointerFromMemory(obj_at_idx, error);
if (error.Fail())
return lldb::ValueObjectSP();
test_idx++;
if (!obj_at_idx)
continue;
tries++;
SetItemDescriptor descriptor = {obj_at_idx,lldb::ValueObjectSP()};
m_children.push_back(descriptor);
}
}
if (idx >= m_children.size()) // should never happen
return lldb::ValueObjectSP();
SetItemDescriptor &set_item = m_children[idx];
if (!set_item.valobj_sp)
{
// make the new ValueObject
StreamString expr;
expr.Printf("(id)%" PRIu64,set_item.item_ptr);
StreamString idx_name;
idx_name.Printf("[%zu]",idx);
set_item.valobj_sp = ValueObject::CreateValueObjectFromExpression(idx_name.GetData(), expr.GetData(), m_exe_ctx_ref);
}
return set_item.valobj_sp;
}
lldb_private::formatters::NSSetMSyntheticFrontEnd::NSSetMSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
SyntheticChildrenFrontEnd(*valobj_sp.get()),
m_exe_ctx_ref(),
m_ptr_size(8),
m_data_32(NULL),
m_data_64(NULL)
{
if (valobj_sp)
Update ();
}
lldb_private::formatters::NSSetMSyntheticFrontEnd::~NSSetMSyntheticFrontEnd ()
{
delete m_data_32;
m_data_32 = NULL;
delete m_data_64;
m_data_64 = NULL;
}
size_t
lldb_private::formatters::NSSetMSyntheticFrontEnd::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::NSSetMSyntheticFrontEnd::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::NSSetMSyntheticFrontEnd::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;
if (!valobj_sp)
return false;
m_exe_ctx_ref = valobj_sp->GetExecutionContextRef();
Error error;
if (valobj_sp->IsPointerType())
{
valobj_sp = valobj_sp->Dereference(error);
if (error.Fail() || !valobj_sp)
return false;
}
error.Clear();
lldb::ProcessSP process_sp(valobj_sp->GetProcessSP());
if (!process_sp)
return false;
m_ptr_size = process_sp->GetAddressByteSize();
uint64_t data_location = valobj_sp->GetAddressOf() + 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::NSSetMSyntheticFrontEnd::MightHaveChildren ()
{
return true;
}
lldb::ValueObjectSP
lldb_private::formatters::NSSetMSyntheticFrontEnd::GetChildAtIndex (size_t idx)
{
lldb::addr_t m_objs_addr = (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 obj_at_idx = 0;
uint32_t tries = 0;
uint32_t test_idx = 0;
while(tries < num_children)
{
obj_at_idx = m_objs_addr + (test_idx * m_ptr_size);
ProcessSP process_sp = m_exe_ctx_ref.GetProcessSP();
if (!process_sp)
return lldb::ValueObjectSP();
Error error;
obj_at_idx = process_sp->ReadPointerFromMemory(obj_at_idx, error);
if (error.Fail())
return lldb::ValueObjectSP();
test_idx++;
if (!obj_at_idx)
continue;
tries++;
SetItemDescriptor descriptor = {obj_at_idx,lldb::ValueObjectSP()};
m_children.push_back(descriptor);
}
}
if (idx >= m_children.size()) // should never happen
return lldb::ValueObjectSP();
SetItemDescriptor &set_item = m_children[idx];
if (!set_item.valobj_sp)
{
// make the new ValueObject
StreamString expr;
expr.Printf("(id)%" PRIu64,set_item.item_ptr);
StreamString idx_name;
idx_name.Printf("[%zu]",idx);
set_item.valobj_sp = ValueObject::CreateValueObjectFromExpression(idx_name.GetData(), expr.GetData(), m_exe_ctx_ref);
}
return set_item.valobj_sp;
}
template bool
lldb_private::formatters::NSSetSummaryProvider<true> (ValueObject& valobj, Stream& stream);
template bool
lldb_private::formatters::NSSetSummaryProvider<false> (ValueObject& valobj, Stream& stream);
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