574 lines
18 KiB
C++
574 lines
18 KiB
C++
//===-- AppleObjCClassDescriptorV2.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 "AppleObjCClassDescriptorV2.h"
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#include "lldb/Core/Log.h"
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#include "lldb/Expression/FunctionCaller.h"
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using namespace lldb;
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using namespace lldb_private;
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bool
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ClassDescriptorV2::Read_objc_class (Process* process, std::unique_ptr<objc_class_t> &objc_class) const
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{
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objc_class.reset(new objc_class_t);
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bool ret = objc_class->Read (process, m_objc_class_ptr);
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if (!ret)
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objc_class.reset();
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return ret;
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}
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bool
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ClassDescriptorV2::objc_class_t::Read(Process *process, lldb::addr_t addr)
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{
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size_t ptr_size = process->GetAddressByteSize();
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size_t objc_class_size = ptr_size // uintptr_t isa;
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+ ptr_size // Class superclass;
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+ ptr_size // void *cache;
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+ ptr_size // IMP *vtable;
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+ ptr_size; // uintptr_t data_NEVER_USE;
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DataBufferHeap objc_class_buf (objc_class_size, '\0');
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Error error;
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process->ReadMemory(addr, objc_class_buf.GetBytes(), objc_class_size, error);
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if (error.Fail())
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{
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return false;
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}
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DataExtractor extractor(objc_class_buf.GetBytes(), objc_class_size, process->GetByteOrder(), process->GetAddressByteSize());
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lldb::offset_t cursor = 0;
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m_isa = extractor.GetAddress_unchecked(&cursor); // uintptr_t isa;
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m_superclass = extractor.GetAddress_unchecked(&cursor); // Class superclass;
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m_cache_ptr = extractor.GetAddress_unchecked(&cursor); // void *cache;
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m_vtable_ptr = extractor.GetAddress_unchecked(&cursor); // IMP *vtable;
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lldb::addr_t data_NEVER_USE = extractor.GetAddress_unchecked(&cursor); // uintptr_t data_NEVER_USE;
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m_flags = (uint8_t)(data_NEVER_USE & (lldb::addr_t)3);
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m_data_ptr = data_NEVER_USE & ~(lldb::addr_t)3;
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return true;
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}
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bool
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ClassDescriptorV2::class_rw_t::Read(Process *process, lldb::addr_t addr)
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{
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size_t ptr_size = process->GetAddressByteSize();
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size_t size = sizeof(uint32_t) // uint32_t flags;
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+ sizeof(uint32_t) // uint32_t version;
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+ ptr_size // const class_ro_t *ro;
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+ ptr_size // union { method_list_t **method_lists; method_list_t *method_list; };
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+ ptr_size // struct chained_property_list *properties;
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+ ptr_size // const protocol_list_t **protocols;
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+ ptr_size // Class firstSubclass;
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+ ptr_size; // Class nextSiblingClass;
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DataBufferHeap buffer (size, '\0');
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Error error;
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process->ReadMemory(addr, buffer.GetBytes(), size, error);
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if (error.Fail())
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{
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return false;
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}
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DataExtractor extractor(buffer.GetBytes(), size, process->GetByteOrder(), process->GetAddressByteSize());
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lldb::offset_t cursor = 0;
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m_flags = extractor.GetU32_unchecked(&cursor);
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m_version = extractor.GetU32_unchecked(&cursor);
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m_ro_ptr = extractor.GetAddress_unchecked(&cursor);
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m_method_list_ptr = extractor.GetAddress_unchecked(&cursor);
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m_properties_ptr = extractor.GetAddress_unchecked(&cursor);
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m_firstSubclass = extractor.GetAddress_unchecked(&cursor);
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m_nextSiblingClass = extractor.GetAddress_unchecked(&cursor);
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return true;
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}
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bool
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ClassDescriptorV2::class_ro_t::Read(Process *process, lldb::addr_t addr)
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{
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size_t ptr_size = process->GetAddressByteSize();
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size_t size = sizeof(uint32_t) // uint32_t flags;
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+ sizeof(uint32_t) // uint32_t instanceStart;
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+ sizeof(uint32_t) // uint32_t instanceSize;
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+ (ptr_size == 8 ? sizeof(uint32_t) : 0) // uint32_t reserved; // __LP64__ only
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+ ptr_size // const uint8_t *ivarLayout;
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+ ptr_size // const char *name;
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+ ptr_size // const method_list_t *baseMethods;
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+ ptr_size // const protocol_list_t *baseProtocols;
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+ ptr_size // const ivar_list_t *ivars;
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+ ptr_size // const uint8_t *weakIvarLayout;
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+ ptr_size; // const property_list_t *baseProperties;
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DataBufferHeap buffer (size, '\0');
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Error error;
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process->ReadMemory(addr, buffer.GetBytes(), size, error);
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if (error.Fail())
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{
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return false;
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}
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DataExtractor extractor(buffer.GetBytes(), size, process->GetByteOrder(), process->GetAddressByteSize());
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lldb::offset_t cursor = 0;
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m_flags = extractor.GetU32_unchecked(&cursor);
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m_instanceStart = extractor.GetU32_unchecked(&cursor);
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m_instanceSize = extractor.GetU32_unchecked(&cursor);
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if (ptr_size == 8)
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m_reserved = extractor.GetU32_unchecked(&cursor);
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else
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m_reserved = 0;
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m_ivarLayout_ptr = extractor.GetAddress_unchecked(&cursor);
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m_name_ptr = extractor.GetAddress_unchecked(&cursor);
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m_baseMethods_ptr = extractor.GetAddress_unchecked(&cursor);
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m_baseProtocols_ptr = extractor.GetAddress_unchecked(&cursor);
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m_ivars_ptr = extractor.GetAddress_unchecked(&cursor);
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m_weakIvarLayout_ptr = extractor.GetAddress_unchecked(&cursor);
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m_baseProperties_ptr = extractor.GetAddress_unchecked(&cursor);
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DataBufferHeap name_buf(1024, '\0');
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process->ReadCStringFromMemory(m_name_ptr, (char*)name_buf.GetBytes(), name_buf.GetByteSize(), error);
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if (error.Fail())
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{
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return false;
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}
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m_name.assign((char*)name_buf.GetBytes());
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return true;
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}
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bool
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ClassDescriptorV2::Read_class_row (Process* process, const objc_class_t &objc_class, std::unique_ptr<class_ro_t> &class_ro, std::unique_ptr<class_rw_t> &class_rw) const
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{
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class_ro.reset();
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class_rw.reset();
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Error error;
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uint32_t class_row_t_flags = process->ReadUnsignedIntegerFromMemory(objc_class.m_data_ptr, sizeof(uint32_t), 0, error);
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if (!error.Success())
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return false;
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if (class_row_t_flags & RW_REALIZED)
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{
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class_rw.reset(new class_rw_t);
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if (!class_rw->Read(process, objc_class.m_data_ptr))
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{
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class_rw.reset();
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return false;
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}
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class_ro.reset(new class_ro_t);
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if (!class_ro->Read(process, class_rw->m_ro_ptr))
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{
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class_rw.reset();
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class_ro.reset();
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return false;
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}
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}
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else
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{
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class_ro.reset(new class_ro_t);
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if (!class_ro->Read(process, objc_class.m_data_ptr))
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{
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class_ro.reset();
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return false;
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}
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}
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return true;
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}
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bool
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ClassDescriptorV2::method_list_t::Read(Process *process, lldb::addr_t addr)
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{
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size_t size = sizeof(uint32_t) // uint32_t entsize_NEVER_USE;
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+ sizeof(uint32_t); // uint32_t count;
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DataBufferHeap buffer (size, '\0');
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Error error;
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process->ReadMemory(addr, buffer.GetBytes(), size, error);
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if (error.Fail())
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{
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return false;
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}
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DataExtractor extractor(buffer.GetBytes(), size, process->GetByteOrder(), process->GetAddressByteSize());
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lldb::offset_t cursor = 0;
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m_entsize = extractor.GetU32_unchecked(&cursor) & ~(uint32_t)3;
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m_count = extractor.GetU32_unchecked(&cursor);
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m_first_ptr = addr + cursor;
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return true;
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}
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bool
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ClassDescriptorV2::method_t::Read(Process *process, lldb::addr_t addr)
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{
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size_t size = GetSize(process);
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DataBufferHeap buffer (size, '\0');
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Error error;
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process->ReadMemory(addr, buffer.GetBytes(), size, error);
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if (error.Fail())
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{
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return false;
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}
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DataExtractor extractor(buffer.GetBytes(), size, process->GetByteOrder(), process->GetAddressByteSize());
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lldb::offset_t cursor = 0;
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m_name_ptr = extractor.GetAddress_unchecked(&cursor);
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m_types_ptr = extractor.GetAddress_unchecked(&cursor);
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m_imp_ptr = extractor.GetAddress_unchecked(&cursor);
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process->ReadCStringFromMemory(m_name_ptr, m_name, error);
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if (error.Fail())
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{
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return false;
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}
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process->ReadCStringFromMemory(m_types_ptr, m_types, error);
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if (error.Fail())
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{
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return false;
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}
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return true;
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}
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bool
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ClassDescriptorV2::ivar_list_t::Read(Process *process, lldb::addr_t addr)
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{
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size_t size = sizeof(uint32_t) // uint32_t entsize;
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+ sizeof(uint32_t); // uint32_t count;
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DataBufferHeap buffer (size, '\0');
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Error error;
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process->ReadMemory(addr, buffer.GetBytes(), size, error);
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if (error.Fail())
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{
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return false;
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}
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DataExtractor extractor(buffer.GetBytes(), size, process->GetByteOrder(), process->GetAddressByteSize());
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lldb::offset_t cursor = 0;
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m_entsize = extractor.GetU32_unchecked(&cursor);
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m_count = extractor.GetU32_unchecked(&cursor);
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m_first_ptr = addr + cursor;
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return true;
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}
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bool
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ClassDescriptorV2::ivar_t::Read(Process *process, lldb::addr_t addr)
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{
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size_t size = GetSize(process);
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DataBufferHeap buffer (size, '\0');
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Error error;
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process->ReadMemory(addr, buffer.GetBytes(), size, error);
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if (error.Fail())
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{
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return false;
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}
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DataExtractor extractor(buffer.GetBytes(), size, process->GetByteOrder(), process->GetAddressByteSize());
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lldb::offset_t cursor = 0;
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m_offset_ptr = extractor.GetAddress_unchecked(&cursor);
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m_name_ptr = extractor.GetAddress_unchecked(&cursor);
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m_type_ptr = extractor.GetAddress_unchecked(&cursor);
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m_alignment = extractor.GetU32_unchecked(&cursor);
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m_size = extractor.GetU32_unchecked(&cursor);
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process->ReadCStringFromMemory(m_name_ptr, m_name, error);
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if (error.Fail())
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{
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return false;
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}
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process->ReadCStringFromMemory(m_type_ptr, m_type, error);
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if (error.Fail())
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{
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return false;
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}
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return true;
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}
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bool
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ClassDescriptorV2::Describe (std::function <void (ObjCLanguageRuntime::ObjCISA)> const &superclass_func,
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std::function <bool (const char *, const char *)> const &instance_method_func,
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std::function <bool (const char *, const char *)> const &class_method_func,
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std::function <bool (const char *, const char *, lldb::addr_t, uint64_t)> const &ivar_func) const
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{
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lldb_private::Process *process = m_runtime.GetProcess();
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std::unique_ptr<objc_class_t> objc_class;
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std::unique_ptr<class_ro_t> class_ro;
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std::unique_ptr<class_rw_t> class_rw;
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if (!Read_objc_class(process, objc_class))
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return 0;
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if (!Read_class_row(process, *objc_class, class_ro, class_rw))
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return 0;
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static ConstString NSObject_name("NSObject");
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if (m_name != NSObject_name && superclass_func)
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superclass_func(objc_class->m_superclass);
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if (instance_method_func)
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{
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std::unique_ptr<method_list_t> base_method_list;
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base_method_list.reset(new method_list_t);
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if (!base_method_list->Read(process, class_ro->m_baseMethods_ptr))
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return false;
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if (base_method_list->m_entsize != method_t::GetSize(process))
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return false;
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std::unique_ptr<method_t> method;
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method.reset(new method_t);
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for (uint32_t i = 0, e = base_method_list->m_count; i < e; ++i)
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{
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method->Read(process, base_method_list->m_first_ptr + (i * base_method_list->m_entsize));
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if (instance_method_func(method->m_name.c_str(), method->m_types.c_str()))
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break;
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}
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}
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if (class_method_func)
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{
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AppleObjCRuntime::ClassDescriptorSP metaclass(GetMetaclass());
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// We don't care about the metaclass's superclass, or its class methods. Its instance methods are
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// our class methods.
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if (metaclass) {
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metaclass->Describe(std::function <void (ObjCLanguageRuntime::ObjCISA)> (nullptr),
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class_method_func,
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std::function <bool (const char *, const char *)> (nullptr),
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std::function <bool (const char *, const char *, lldb::addr_t, uint64_t)> (nullptr));
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}
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}
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if (ivar_func)
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{
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if (class_ro->m_ivars_ptr != 0)
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{
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ivar_list_t ivar_list;
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if (!ivar_list.Read(process, class_ro->m_ivars_ptr))
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return false;
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if (ivar_list.m_entsize != ivar_t::GetSize(process))
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return false;
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ivar_t ivar;
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for (uint32_t i = 0, e = ivar_list.m_count; i < e; ++i)
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{
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ivar.Read(process, ivar_list.m_first_ptr + (i * ivar_list.m_entsize));
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if (ivar_func(ivar.m_name.c_str(), ivar.m_type.c_str(), ivar.m_offset_ptr, ivar.m_size))
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break;
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}
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}
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}
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return true;
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}
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ConstString
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ClassDescriptorV2::GetClassName ()
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{
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if (!m_name)
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{
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lldb_private::Process *process = m_runtime.GetProcess();
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if (process)
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{
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std::unique_ptr<objc_class_t> objc_class;
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std::unique_ptr<class_ro_t> class_ro;
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std::unique_ptr<class_rw_t> class_rw;
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if (!Read_objc_class(process, objc_class))
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return m_name;
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if (!Read_class_row(process, *objc_class, class_ro, class_rw))
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return m_name;
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m_name = ConstString(class_ro->m_name.c_str());
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}
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}
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return m_name;
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}
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ObjCLanguageRuntime::ClassDescriptorSP
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ClassDescriptorV2::GetSuperclass ()
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{
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lldb_private::Process *process = m_runtime.GetProcess();
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if (!process)
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return ObjCLanguageRuntime::ClassDescriptorSP();
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std::unique_ptr<objc_class_t> objc_class;
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if (!Read_objc_class(process, objc_class))
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return ObjCLanguageRuntime::ClassDescriptorSP();
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return m_runtime.ObjCLanguageRuntime::GetClassDescriptorFromISA(objc_class->m_superclass);
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}
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ObjCLanguageRuntime::ClassDescriptorSP
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ClassDescriptorV2::GetMetaclass () const
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{
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lldb_private::Process *process = m_runtime.GetProcess();
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if (!process)
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return ObjCLanguageRuntime::ClassDescriptorSP();
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std::unique_ptr<objc_class_t> objc_class;
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if (!Read_objc_class(process, objc_class))
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return ObjCLanguageRuntime::ClassDescriptorSP();
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lldb::addr_t candidate_isa = m_runtime.GetPointerISA(objc_class->m_isa);
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return ObjCLanguageRuntime::ClassDescriptorSP(new ClassDescriptorV2(m_runtime, candidate_isa, nullptr));
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}
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uint64_t
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ClassDescriptorV2::GetInstanceSize ()
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{
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lldb_private::Process *process = m_runtime.GetProcess();
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if (process)
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{
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std::unique_ptr<objc_class_t> objc_class;
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std::unique_ptr<class_ro_t> class_ro;
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std::unique_ptr<class_rw_t> class_rw;
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if (!Read_objc_class(process, objc_class))
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return 0;
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if (!Read_class_row(process, *objc_class, class_ro, class_rw))
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return 0;
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return class_ro->m_instanceSize;
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}
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return 0;
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}
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ClassDescriptorV2::iVarsStorage::iVarsStorage ():
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m_filled(false),
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m_ivars(),
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m_mutex(Mutex::eMutexTypeRecursive)
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{}
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size_t
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ClassDescriptorV2::iVarsStorage::size ()
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{
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return m_ivars.size();
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}
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ClassDescriptorV2::iVarDescriptor&
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ClassDescriptorV2::iVarsStorage::operator[] (size_t idx)
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{
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return m_ivars[idx];
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}
|
|
|
|
void
|
|
ClassDescriptorV2::iVarsStorage::fill (AppleObjCRuntimeV2& runtime, ClassDescriptorV2& descriptor)
|
|
{
|
|
if (m_filled)
|
|
return;
|
|
Mutex::Locker lock(m_mutex);
|
|
Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_TYPES | LIBLLDB_LOG_VERBOSE));
|
|
if (log)
|
|
log->Printf("[ClassDescriptorV2::iVarsStorage::fill] class_name = %s", descriptor.GetClassName().AsCString("<unknown"));
|
|
m_filled = true;
|
|
ObjCLanguageRuntime::EncodingToTypeSP encoding_to_type_sp(runtime.GetEncodingToType());
|
|
Process* process(runtime.GetProcess());
|
|
if (!encoding_to_type_sp)
|
|
return;
|
|
descriptor.Describe(nullptr,
|
|
nullptr,
|
|
nullptr,
|
|
[this,process,encoding_to_type_sp,log](const char * name, const char * type, lldb::addr_t offset_ptr, uint64_t size) -> bool {
|
|
const bool for_expression = false;
|
|
const bool stop_loop = false;
|
|
if (log)
|
|
log->Printf("[ClassDescriptorV2::iVarsStorage::fill] name = %s, encoding = %s, offset_ptr = %" PRIx64 ", size = %" PRIu64,
|
|
name,type,offset_ptr,size);
|
|
CompilerType ivar_type = encoding_to_type_sp->RealizeType(type, for_expression);
|
|
if (ivar_type)
|
|
{
|
|
if (log)
|
|
log->Printf("[ClassDescriptorV2::iVarsStorage::fill] name = %s, encoding = %s, offset_ptr = %" PRIx64 ", size = %" PRIu64 " , type_size = %" PRIu64,
|
|
name,type,offset_ptr,size,ivar_type.GetByteSize(nullptr));
|
|
Scalar offset_scalar;
|
|
Error error;
|
|
const int offset_ptr_size = 4;
|
|
const bool is_signed = false;
|
|
size_t read = process->ReadScalarIntegerFromMemory(offset_ptr, offset_ptr_size, is_signed, offset_scalar, error);
|
|
if (error.Success() && 4 == read)
|
|
{
|
|
if (log)
|
|
log->Printf("[ClassDescriptorV2::iVarsStorage::fill] offset_ptr = %" PRIx64 " --> %" PRIu32,
|
|
offset_ptr, offset_scalar.SInt());
|
|
m_ivars.push_back({ ConstString(name), ivar_type, size, offset_scalar.SInt() });
|
|
}
|
|
else if (log)
|
|
log->Printf("[ClassDescriptorV2::iVarsStorage::fill] offset_ptr = %" PRIx64 " --> read fail, read = %zu",
|
|
offset_ptr, read);
|
|
}
|
|
return stop_loop;
|
|
});
|
|
}
|
|
|
|
void
|
|
ClassDescriptorV2::GetIVarInformation ()
|
|
{
|
|
m_ivars_storage.fill(m_runtime, *this);
|
|
}
|