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//===-- TypeFormat.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/TypeFormat.h"
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/lldb-public.h"
#include "lldb/lldb-enumerations.h"
#include "lldb/Core/StreamString.h"
#include "lldb/DataFormatters/FormatManager.h"
#include "lldb/Symbol/CompilerType.h"
#include "lldb/Symbol/SymbolContext.h"
#include "lldb/Symbol/SymbolFile.h"
#include "lldb/Symbol/TypeList.h"
#include "lldb/Target/Target.h"
using namespace lldb;
using namespace lldb_private;
TypeFormatImpl::TypeFormatImpl (const Flags& flags) :
m_flags(flags),
m_my_revision(0)
{
}
TypeFormatImpl::~TypeFormatImpl ()
{
}
TypeFormatImpl_Format::TypeFormatImpl_Format (lldb::Format f,
const TypeFormatImpl::Flags& flags) :
TypeFormatImpl(flags),
m_format (f)
{
}
TypeFormatImpl_Format::~TypeFormatImpl_Format ()
{
}
bool
TypeFormatImpl_Format::FormatObject (ValueObject *valobj,
std::string& dest) const
{
if (!valobj)
return false;
if (valobj->CanProvideValue())
{
Value& value(valobj->GetValue());
const Value::ContextType context_type = value.GetContextType();
ExecutionContext exe_ctx (valobj->GetExecutionContextRef());
DataExtractor data;
if (context_type == Value::eContextTypeRegisterInfo)
{
const RegisterInfo *reg_info = value.GetRegisterInfo();
if (reg_info)
{
Error error;
valobj->GetData(data, error);
if (error.Fail())
return false;
StreamString reg_sstr;
data.Dump (®_sstr,
0,
GetFormat(),
reg_info->byte_size,
1,
UINT32_MAX,
LLDB_INVALID_ADDRESS,
0,
0,
exe_ctx.GetBestExecutionContextScope());
dest.swap(reg_sstr.GetString());
}
}
else
{
CompilerType compiler_type = value.GetCompilerType ();
if (compiler_type)
{
// put custom bytes to display in the DataExtractor to override the default value logic
if (GetFormat() == eFormatCString)
{
lldb_private::Flags type_flags(compiler_type.GetTypeInfo(NULL)); // disambiguate w.r.t. TypeFormatImpl::Flags
if (type_flags.Test(eTypeIsPointer) && !type_flags.Test(eTypeIsObjC))
{
// if we are dumping a pointer as a c-string, get the pointee data as a string
TargetSP target_sp(valobj->GetTargetSP());
if (target_sp)
{
size_t max_len = target_sp->GetMaximumSizeOfStringSummary();
Error error;
DataBufferSP buffer_sp(new DataBufferHeap(max_len+1,0));
Address address(valobj->GetPointerValue());
if (target_sp->ReadCStringFromMemory(address, (char*)buffer_sp->GetBytes(), max_len, error) && error.Success())
data.SetData(buffer_sp);
}
}
}
else
{
Error error;
valobj->GetData(data, error);
if (error.Fail())
return false;
}
StreamString sstr;
compiler_type.DumpTypeValue (&sstr, // The stream to use for display
GetFormat(), // Format to display this type with
data, // Data to extract from
0, // Byte offset into "m_data"
valobj->GetByteSize(), // Byte size of item in "m_data"
valobj->GetBitfieldBitSize(), // Bitfield bit size
valobj->GetBitfieldBitOffset(), // Bitfield bit offset
exe_ctx.GetBestExecutionContextScope());
// Given that we do not want to set the ValueObject's m_error
// for a formatting error (or else we wouldn't be able to reformat
// until a next update), an empty string is treated as a "false"
// return from here, but that's about as severe as we get
// CompilerType::DumpTypeValue() should always return
// something, even if that something is an error message
if (sstr.GetString().empty())
dest.clear();
else
dest.swap(sstr.GetString());
}
}
return !dest.empty();
}
else
return false;
}
std::string
TypeFormatImpl_Format::GetDescription()
{
StreamString sstr;
sstr.Printf ("%s%s%s%s",
FormatManager::GetFormatAsCString (GetFormat()),
Cascades() ? "" : " (not cascading)",
SkipsPointers() ? " (skip pointers)" : "",
SkipsReferences() ? " (skip references)" : "");
return sstr.GetString();
}
TypeFormatImpl_EnumType::TypeFormatImpl_EnumType (ConstString type_name,
const TypeFormatImpl::Flags& flags) :
TypeFormatImpl(flags),
m_enum_type(type_name),
m_types()
{
}
TypeFormatImpl_EnumType::~TypeFormatImpl_EnumType ()
{
}
bool
TypeFormatImpl_EnumType::FormatObject (ValueObject *valobj,
std::string& dest) const
{
dest.clear();
if (!valobj)
return false;
if (!valobj->CanProvideValue())
return false;
ProcessSP process_sp;
TargetSP target_sp;
void* valobj_key = (process_sp = valobj->GetProcessSP()).get();
if (!valobj_key)
valobj_key = (target_sp = valobj->GetTargetSP()).get();
else
target_sp = process_sp->GetTarget().shared_from_this();
if (!valobj_key)
return false;
auto iter = m_types.find(valobj_key),
end = m_types.end();
CompilerType valobj_enum_type;
if (iter == end)
{
// probably a redundant check
if (!target_sp)
return false;
const ModuleList& images(target_sp->GetImages());
SymbolContext sc;
TypeList types;
llvm::DenseSet<lldb_private::SymbolFile *> searched_symbol_files;
images.FindTypes(sc, m_enum_type, false, UINT32_MAX, searched_symbol_files, types);
if (types.GetSize() == 0)
return false;
for (lldb::TypeSP type_sp : types.Types())
{
if (!type_sp)
continue;
if ( (type_sp->GetForwardCompilerType().GetTypeInfo() & eTypeIsEnumeration) == eTypeIsEnumeration)
{
valobj_enum_type = type_sp->GetFullCompilerType ();
m_types.emplace(valobj_key,valobj_enum_type);
break;
}
}
}
else
valobj_enum_type = iter->second;
if (valobj_enum_type.IsValid() == false)
return false;
DataExtractor data;
Error error;
valobj->GetData(data, error);
if (error.Fail())
return false;
ExecutionContext exe_ctx (valobj->GetExecutionContextRef());
StreamString sstr;
valobj_enum_type.DumpTypeValue(&sstr,
lldb::eFormatEnum,
data,
0,
data.GetByteSize(),
0,
0,
exe_ctx.GetBestExecutionContextScope());
if (!sstr.GetString().empty())
dest.swap(sstr.GetString());
return !dest.empty();
}
std::string
TypeFormatImpl_EnumType::GetDescription()
{
StreamString sstr;
sstr.Printf ("as type %s%s%s%s",
m_enum_type.AsCString("<invalid type>"),
Cascades() ? "" : " (not cascading)",
SkipsPointers() ? " (skip pointers)" : "",
SkipsReferences() ? " (skip references)" : "");
return sstr.GetString();
}
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