9ac7a6c51f
Summary: Along with this, support for an optional argument to the "num_children" method of a Python synthetic child provider has also been added. These have been added with the following use case in mind: Synthetic child providers currently have a method "has_children" and "num_children". While the former is good enough to know if there are children, it does not give any insight into how many children there are. Though the latter serves this purpose, calculating the number for children of a data structure could be an O(N) operation if the data structure has N children. The new method added in this change provide a middle ground. One can call GetNumChildren(K) to know if a child exists at an index K which can be as large as the callers tolerance can be. If the caller wants to know about children beyond K, it can make an other call with 2K. If the synthetic child provider maintains state about it counting till K previosly, then the next call is only an O(K) operation. Infact, all calls made progressively with steps of K will be O(K) operations. Reviewers: vharron, clayborg, granata.enrico Subscribers: labath, lldb-commits Differential Revision: http://reviews.llvm.org/D13778 llvm-svn: 250930
382 lines
12 KiB
C++
382 lines
12 KiB
C++
//===-- ValueObjectConstResult.cpp ------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Core/ValueObjectConstResult.h"
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#include "lldb/Core/ValueObjectChild.h"
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#include "lldb/Core/ValueObjectConstResultChild.h"
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#include "lldb/Core/DataExtractor.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Core/ValueObjectDynamicValue.h"
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#include "lldb/Core/ValueObjectList.h"
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#include "lldb/Symbol/CompilerType.h"
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#include "lldb/Symbol/ObjectFile.h"
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#include "lldb/Symbol/SymbolContext.h"
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#include "lldb/Symbol/Type.h"
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#include "lldb/Symbol/Variable.h"
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#include "lldb/Target/ExecutionContext.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/Target.h"
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using namespace lldb;
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using namespace lldb_private;
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ValueObjectSP
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ValueObjectConstResult::Create (ExecutionContextScope *exe_scope,
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ByteOrder byte_order,
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uint32_t addr_byte_size,
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lldb::addr_t address)
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{
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return (new ValueObjectConstResult (exe_scope,
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byte_order,
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addr_byte_size,
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address))->GetSP();
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}
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ValueObjectConstResult::ValueObjectConstResult (ExecutionContextScope *exe_scope,
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ByteOrder byte_order,
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uint32_t addr_byte_size,
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lldb::addr_t address) :
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ValueObject (exe_scope),
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m_type_name (),
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m_byte_size (0),
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m_impl(this, address)
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{
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SetIsConstant ();
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SetValueIsValid(true);
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m_data.SetByteOrder(byte_order);
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m_data.SetAddressByteSize(addr_byte_size);
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SetAddressTypeOfChildren(eAddressTypeLoad);
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}
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ValueObjectSP
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ValueObjectConstResult::Create
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(
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ExecutionContextScope *exe_scope,
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const CompilerType &compiler_type,
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const ConstString &name,
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const DataExtractor &data,
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lldb::addr_t address
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)
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{
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return (new ValueObjectConstResult (exe_scope,
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compiler_type,
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name,
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data,
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address))->GetSP();
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}
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ValueObjectConstResult::ValueObjectConstResult (ExecutionContextScope *exe_scope,
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const CompilerType &compiler_type,
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const ConstString &name,
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const DataExtractor &data,
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lldb::addr_t address) :
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ValueObject (exe_scope),
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m_type_name (),
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m_byte_size (0),
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m_impl(this, address)
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{
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m_data = data;
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if (!m_data.GetSharedDataBuffer())
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{
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DataBufferSP shared_data_buffer(new DataBufferHeap(data.GetDataStart(), data.GetByteSize()));
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m_data.SetData(shared_data_buffer);
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}
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m_value.GetScalar() = (uintptr_t)m_data.GetDataStart();
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m_value.SetValueType(Value::eValueTypeHostAddress);
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m_value.SetCompilerType(compiler_type);
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m_name = name;
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SetIsConstant ();
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SetValueIsValid(true);
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SetAddressTypeOfChildren(eAddressTypeLoad);
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}
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ValueObjectSP
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ValueObjectConstResult::Create (ExecutionContextScope *exe_scope,
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const CompilerType &compiler_type,
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const ConstString &name,
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const lldb::DataBufferSP &data_sp,
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lldb::ByteOrder data_byte_order,
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uint32_t data_addr_size,
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lldb::addr_t address)
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{
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return (new ValueObjectConstResult (exe_scope,
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compiler_type,
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name,
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data_sp,
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data_byte_order,
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data_addr_size,
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address))->GetSP();
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}
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ValueObjectSP
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ValueObjectConstResult::Create (ExecutionContextScope *exe_scope,
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Value &value,
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const ConstString &name,
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Module *module)
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{
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return (new ValueObjectConstResult (exe_scope, value, name, module))->GetSP();
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}
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ValueObjectConstResult::ValueObjectConstResult (ExecutionContextScope *exe_scope,
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const CompilerType &compiler_type,
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const ConstString &name,
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const lldb::DataBufferSP &data_sp,
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lldb::ByteOrder data_byte_order,
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uint32_t data_addr_size,
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lldb::addr_t address) :
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ValueObject (exe_scope),
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m_type_name (),
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m_byte_size (0),
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m_impl(this, address)
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{
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m_data.SetByteOrder(data_byte_order);
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m_data.SetAddressByteSize(data_addr_size);
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m_data.SetData(data_sp);
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m_value.GetScalar() = (uintptr_t)data_sp->GetBytes();
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m_value.SetValueType(Value::eValueTypeHostAddress);
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//m_value.SetContext(Value::eContextTypeClangType, compiler_type);
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m_value.SetCompilerType (compiler_type);
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m_name = name;
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SetIsConstant ();
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SetValueIsValid(true);
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SetAddressTypeOfChildren(eAddressTypeLoad);
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}
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ValueObjectSP
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ValueObjectConstResult::Create (ExecutionContextScope *exe_scope,
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const CompilerType &compiler_type,
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const ConstString &name,
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lldb::addr_t address,
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AddressType address_type,
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uint32_t addr_byte_size)
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{
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return (new ValueObjectConstResult (exe_scope,
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compiler_type,
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name,
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address,
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address_type,
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addr_byte_size))->GetSP();
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}
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ValueObjectConstResult::ValueObjectConstResult (ExecutionContextScope *exe_scope,
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const CompilerType &compiler_type,
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const ConstString &name,
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lldb::addr_t address,
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AddressType address_type,
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uint32_t addr_byte_size) :
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ValueObject (exe_scope),
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m_type_name (),
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m_byte_size (0),
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m_impl(this, address)
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{
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m_value.GetScalar() = address;
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m_data.SetAddressByteSize(addr_byte_size);
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m_value.GetScalar().GetData (m_data, addr_byte_size);
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//m_value.SetValueType(Value::eValueTypeHostAddress);
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switch (address_type)
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{
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case eAddressTypeInvalid: m_value.SetValueType(Value::eValueTypeScalar); break;
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case eAddressTypeFile: m_value.SetValueType(Value::eValueTypeFileAddress); break;
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case eAddressTypeLoad: m_value.SetValueType(Value::eValueTypeLoadAddress); break;
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case eAddressTypeHost: m_value.SetValueType(Value::eValueTypeHostAddress); break;
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}
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// m_value.SetContext(Value::eContextTypeClangType, compiler_type);
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m_value.SetCompilerType (compiler_type);
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m_name = name;
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SetIsConstant ();
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SetValueIsValid(true);
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SetAddressTypeOfChildren(eAddressTypeLoad);
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}
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ValueObjectSP
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ValueObjectConstResult::Create
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(
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ExecutionContextScope *exe_scope,
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const Error& error
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)
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{
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return (new ValueObjectConstResult (exe_scope,
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error))->GetSP();
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}
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ValueObjectConstResult::ValueObjectConstResult (ExecutionContextScope *exe_scope,
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const Error& error) :
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ValueObject (exe_scope),
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m_type_name (),
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m_byte_size (0),
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m_impl(this)
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{
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m_error = error;
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SetIsConstant ();
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}
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ValueObjectConstResult::ValueObjectConstResult (ExecutionContextScope *exe_scope,
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const Value &value,
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const ConstString &name,
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Module *module) :
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ValueObject (exe_scope),
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m_type_name (),
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m_byte_size (0),
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m_impl(this)
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{
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m_value = value;
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m_name = name;
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ExecutionContext exe_ctx;
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exe_scope->CalculateExecutionContext(exe_ctx);
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m_error = m_value.GetValueAsData(&exe_ctx, m_data, 0, module);
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}
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ValueObjectConstResult::~ValueObjectConstResult()
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{
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}
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CompilerType
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ValueObjectConstResult::GetCompilerTypeImpl()
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{
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return m_value.GetCompilerType();
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}
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lldb::ValueType
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ValueObjectConstResult::GetValueType() const
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{
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return eValueTypeConstResult;
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}
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uint64_t
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ValueObjectConstResult::GetByteSize()
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{
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ExecutionContext exe_ctx(GetExecutionContextRef());
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if (m_byte_size == 0)
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SetByteSize(GetCompilerType().GetByteSize(exe_ctx.GetBestExecutionContextScope()));
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return m_byte_size;
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}
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void
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ValueObjectConstResult::SetByteSize (size_t size)
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{
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m_byte_size = size;
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}
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size_t
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ValueObjectConstResult::CalculateNumChildren(uint32_t max)
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{
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auto children_count = GetCompilerType().GetNumChildren (true);
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return children_count <= max ? children_count : max;
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}
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ConstString
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ValueObjectConstResult::GetTypeName()
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{
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if (m_type_name.IsEmpty())
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m_type_name = GetCompilerType().GetConstTypeName ();
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return m_type_name;
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}
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ConstString
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ValueObjectConstResult::GetDisplayTypeName()
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{
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return GetCompilerType().GetDisplayTypeName();
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}
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bool
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ValueObjectConstResult::UpdateValue ()
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{
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// Const value is always valid
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SetValueIsValid (true);
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return true;
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}
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bool
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ValueObjectConstResult::IsInScope ()
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{
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// A const result value is always in scope since it serializes all
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// information needed to contain the constant value.
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return true;
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}
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lldb::ValueObjectSP
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ValueObjectConstResult::Dereference (Error &error)
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{
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return m_impl.Dereference(error);
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}
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lldb::ValueObjectSP
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ValueObjectConstResult::GetSyntheticChildAtOffset(uint32_t offset, const CompilerType& type, bool can_create)
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{
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return m_impl.GetSyntheticChildAtOffset(offset, type, can_create);
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}
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lldb::ValueObjectSP
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ValueObjectConstResult::AddressOf (Error &error)
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{
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return m_impl.AddressOf(error);
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}
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lldb::addr_t
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ValueObjectConstResult::GetAddressOf (bool scalar_is_load_address,
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AddressType *address_type)
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{
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return m_impl.GetAddressOf(scalar_is_load_address, address_type);
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}
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ValueObject *
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ValueObjectConstResult::CreateChildAtIndex (size_t idx, bool synthetic_array_member, int32_t synthetic_index)
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{
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return m_impl.CreateChildAtIndex(idx, synthetic_array_member, synthetic_index);
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}
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size_t
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ValueObjectConstResult::GetPointeeData (DataExtractor& data,
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uint32_t item_idx,
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uint32_t item_count)
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{
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return m_impl.GetPointeeData(data, item_idx, item_count);
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}
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lldb::ValueObjectSP
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ValueObjectConstResult::GetDynamicValue (lldb::DynamicValueType use_dynamic)
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{
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// Always recalculate dynamic values for const results as the memory that
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// they might point to might have changed at any time.
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if (use_dynamic != eNoDynamicValues)
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{
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if (!IsDynamic())
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{
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ExecutionContext exe_ctx (GetExecutionContextRef());
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Process *process = exe_ctx.GetProcessPtr();
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if (process && process->IsPossibleDynamicValue(*this))
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m_dynamic_value = new ValueObjectDynamicValue (*this, use_dynamic);
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}
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if (m_dynamic_value)
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return m_dynamic_value->GetSP();
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}
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return ValueObjectSP();
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}
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lldb::ValueObjectSP
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ValueObjectConstResult::Cast (const CompilerType &compiler_type)
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{
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return m_impl.Cast(compiler_type);
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}
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lldb::LanguageType
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ValueObjectConstResult::GetPreferredDisplayLanguage ()
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{
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if (m_preferred_display_language != lldb::eLanguageTypeUnknown)
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return m_preferred_display_language;
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return GetCompilerTypeImpl().GetMinimumLanguage();
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}
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