e1cd1be6d6
due to RTTI worries since llvm and clang don't use RTTI, but I was able to switch back with no issues as far as I can tell. Once the RTTI issue wasn't an issue, we were looking for a way to properly track weak pointers to objects to solve some of the threading issues we have been running into which naturally led us back to std::tr1::weak_ptr. We also wanted the ability to make a shared pointer from just a pointer, which is also easily solved using the std::tr1::enable_shared_from_this class. The main reason for this move back is so we can start properly having weak references to objects. Currently a lldb_private::Thread class has a refrence to its parent lldb_private::Process. This doesn't work well when we now hand out a SBThread object that contains a shared pointer to a lldb_private::Thread as this SBThread can be held onto by external clients and if they end up using one of these objects we can easily crash. So the next task is to start adopting std::tr1::weak_ptr where ever it makes sense which we can do with lldb_private::Debugger, lldb_private::Target, lldb_private::Process, lldb_private::Thread, lldb_private::StackFrame, and many more objects now that they are no longer using intrusive ref counted pointer objects (you can't do std::tr1::weak_ptr functionality with intrusive pointers). llvm-svn: 149207
294 lines
12 KiB
C++
294 lines
12 KiB
C++
//===-- ObjectFile.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/lldb-private.h"
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#include "lldb/lldb-private-log.h"
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#include "lldb/Core/DataBuffer.h"
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#include "lldb/Core/Log.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Core/PluginManager.h"
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#include "lldb/Core/RegularExpression.h"
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#include "lldb/Core/Timer.h"
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#include "lldb/Symbol/ObjectFile.h"
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#include "lldb/Symbol/ObjectContainer.h"
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#include "lldb/Symbol/SymbolFile.h"
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using namespace lldb;
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using namespace lldb_private;
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ObjectFileSP
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ObjectFile::FindPlugin (Module* module, const FileSpec* file, addr_t file_offset, addr_t file_size, DataBufferSP &file_data_sp)
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{
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Timer scoped_timer (__PRETTY_FUNCTION__,
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"ObjectFile::FindPlugin (module = %s/%s, file = %p, file_offset = 0x%z8.8x, file_size = 0x%z8.8x)",
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module->GetFileSpec().GetDirectory().AsCString(),
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module->GetFileSpec().GetFilename().AsCString(),
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file, file_offset, file_size);
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ObjectFileSP object_file_sp;
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if (module != NULL)
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{
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if (file)
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{
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// Memory map the entire file contents
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if (!file_data_sp)
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{
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assert (file_offset == 0);
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file_data_sp = file->MemoryMapFileContents(file_offset, file_size);
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}
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if (!file_data_sp || file_data_sp->GetByteSize() == 0)
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{
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// Check for archive file with format "/path/to/archive.a(object.o)"
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char path_with_object[PATH_MAX*2];
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module->GetFileSpec().GetPath(path_with_object, sizeof(path_with_object));
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RegularExpression g_object_regex("(.*)\\(([^\\)]+)\\)$");
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if (g_object_regex.Execute (path_with_object, 2))
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{
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FileSpec archive_file;
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std::string path;
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std::string object;
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if (g_object_regex.GetMatchAtIndex (path_with_object, 1, path) &&
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g_object_regex.GetMatchAtIndex (path_with_object, 2, object))
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{
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archive_file.SetFile (path.c_str(), false);
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file_size = archive_file.GetByteSize();
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if (file_size > 0)
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{
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module->SetFileSpecAndObjectName (archive_file, ConstString(object.c_str()));
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file_data_sp = archive_file.MemoryMapFileContents(file_offset, file_size);
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}
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}
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}
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}
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if (file_data_sp && file_data_sp->GetByteSize() > 0)
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{
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uint32_t idx;
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// Check if this is a normal object file by iterating through
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// all object file plugin instances.
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ObjectFileCreateInstance create_object_file_callback;
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for (idx = 0; (create_object_file_callback = PluginManager::GetObjectFileCreateCallbackAtIndex(idx)) != NULL; ++idx)
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{
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object_file_sp.reset (create_object_file_callback(module, file_data_sp, file, file_offset, file_size));
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if (object_file_sp.get())
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return object_file_sp;
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}
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// Check if this is a object container by iterating through
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// all object container plugin instances and then trying to get
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// an object file from the container.
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ObjectContainerCreateInstance create_object_container_callback;
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for (idx = 0; (create_object_container_callback = PluginManager::GetObjectContainerCreateCallbackAtIndex(idx)) != NULL; ++idx)
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{
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std::auto_ptr<ObjectContainer> object_container_ap(create_object_container_callback(module, file_data_sp, file, file_offset, file_size));
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if (object_container_ap.get())
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object_file_sp = object_container_ap->GetObjectFile(file);
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if (object_file_sp.get())
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return object_file_sp;
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}
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}
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}
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}
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// We didn't find it, so clear our shared pointer in case it
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// contains anything and return an empty shared pointer
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object_file_sp.reset();
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return object_file_sp;
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}
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ObjectFile::ObjectFile (Module* module,
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const FileSpec *file_spec_ptr,
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addr_t file_offset,
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addr_t file_size,
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DataBufferSP& file_data_sp) :
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ModuleChild (module),
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m_file (), // This file could be different from the original module's file
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m_type (eTypeInvalid),
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m_strata (eStrataInvalid),
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m_offset (file_offset),
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m_length (file_size),
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m_data (),
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m_unwind_table (*this)
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{
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if (file_spec_ptr)
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m_file = *file_spec_ptr;
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if (file_data_sp)
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m_data.SetData (file_data_sp, file_offset, file_size);
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LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT));
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if (log)
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{
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if (m_file)
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{
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log->Printf ("%p ObjectFile::ObjectFile () module = %s/%s, file = %s/%s, offset = 0x%8.8llx, size = %llu\n",
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this,
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m_module->GetFileSpec().GetDirectory().AsCString(),
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m_module->GetFileSpec().GetFilename().AsCString(),
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m_file.GetDirectory().AsCString(),
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m_file.GetFilename().AsCString(),
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m_offset,
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m_length);
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}
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else
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{
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log->Printf ("%p ObjectFile::ObjectFile () module = %s/%s, file = <NULL>, offset = 0x%8.8llx, size = %llu\n",
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this,
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m_module->GetFileSpec().GetDirectory().AsCString(),
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m_module->GetFileSpec().GetFilename().AsCString(),
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m_offset,
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m_length);
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}
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}
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}
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ObjectFile::~ObjectFile()
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{
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LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT));
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if (log)
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{
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if (m_file)
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{
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log->Printf ("%p ObjectFile::~ObjectFile () module = %s/%s, file = %s/%s, offset = 0x%8.8llx, size = %llu\n",
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this,
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m_module->GetFileSpec().GetDirectory().AsCString(),
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m_module->GetFileSpec().GetFilename().AsCString(),
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m_file.GetDirectory().AsCString(),
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m_file.GetFilename().AsCString(),
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m_offset,
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m_length);
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}
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else
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{
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log->Printf ("%p ObjectFile::~ObjectFile () module = %s/%s, file = <NULL>, offset = 0x%8.8llx, size = %llu\n",
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this,
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m_module->GetFileSpec().GetDirectory().AsCString(),
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m_module->GetFileSpec().GetFilename().AsCString(),
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m_offset,
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m_length);
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}
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}
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}
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bool
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ObjectFile::SetModulesArchitecture (const ArchSpec &new_arch)
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{
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return m_module->SetArchitecture (new_arch);
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}
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AddressClass
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ObjectFile::GetAddressClass (addr_t file_addr)
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{
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Symtab *symtab = GetSymtab();
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if (symtab)
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{
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Symbol *symbol = symtab->FindSymbolContainingFileAddress(file_addr);
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if (symbol)
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{
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const AddressRange *range_ptr = symbol->GetAddressRangePtr();
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if (range_ptr)
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{
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const Section *section = range_ptr->GetBaseAddress().GetSection();
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if (section)
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{
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const SectionType section_type = section->GetType();
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switch (section_type)
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{
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case eSectionTypeInvalid: return eAddressClassUnknown;
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case eSectionTypeCode: return eAddressClassCode;
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case eSectionTypeContainer: return eAddressClassUnknown;
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case eSectionTypeData:
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case eSectionTypeDataCString:
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case eSectionTypeDataCStringPointers:
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case eSectionTypeDataSymbolAddress:
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case eSectionTypeData4:
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case eSectionTypeData8:
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case eSectionTypeData16:
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case eSectionTypeDataPointers:
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case eSectionTypeZeroFill:
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case eSectionTypeDataObjCMessageRefs:
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case eSectionTypeDataObjCCFStrings:
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return eAddressClassData;
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case eSectionTypeDebug:
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case eSectionTypeDWARFDebugAbbrev:
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case eSectionTypeDWARFDebugAranges:
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case eSectionTypeDWARFDebugFrame:
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case eSectionTypeDWARFDebugInfo:
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case eSectionTypeDWARFDebugLine:
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case eSectionTypeDWARFDebugLoc:
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case eSectionTypeDWARFDebugMacInfo:
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case eSectionTypeDWARFDebugPubNames:
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case eSectionTypeDWARFDebugPubTypes:
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case eSectionTypeDWARFDebugRanges:
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case eSectionTypeDWARFDebugStr:
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case eSectionTypeDWARFAppleNames:
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case eSectionTypeDWARFAppleTypes:
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case eSectionTypeDWARFAppleNamespaces:
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case eSectionTypeDWARFAppleObjC:
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return eAddressClassDebug;
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case eSectionTypeEHFrame: return eAddressClassRuntime;
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case eSectionTypeOther: return eAddressClassUnknown;
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}
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}
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}
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const SymbolType symbol_type = symbol->GetType();
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switch (symbol_type)
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{
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case eSymbolTypeAny: return eAddressClassUnknown;
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case eSymbolTypeAbsolute: return eAddressClassUnknown;
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case eSymbolTypeCode: return eAddressClassCode;
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case eSymbolTypeTrampoline: return eAddressClassCode;
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case eSymbolTypeData: return eAddressClassData;
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case eSymbolTypeRuntime: return eAddressClassRuntime;
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case eSymbolTypeException: return eAddressClassRuntime;
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case eSymbolTypeSourceFile: return eAddressClassDebug;
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case eSymbolTypeHeaderFile: return eAddressClassDebug;
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case eSymbolTypeObjectFile: return eAddressClassDebug;
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case eSymbolTypeCommonBlock: return eAddressClassDebug;
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case eSymbolTypeBlock: return eAddressClassDebug;
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case eSymbolTypeLocal: return eAddressClassData;
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case eSymbolTypeParam: return eAddressClassData;
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case eSymbolTypeVariable: return eAddressClassData;
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case eSymbolTypeVariableType: return eAddressClassDebug;
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case eSymbolTypeLineEntry: return eAddressClassDebug;
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case eSymbolTypeLineHeader: return eAddressClassDebug;
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case eSymbolTypeScopeBegin: return eAddressClassDebug;
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case eSymbolTypeScopeEnd: return eAddressClassDebug;
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case eSymbolTypeAdditional: return eAddressClassUnknown;
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case eSymbolTypeCompiler: return eAddressClassDebug;
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case eSymbolTypeInstrumentation:return eAddressClassDebug;
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case eSymbolTypeUndefined: return eAddressClassUnknown;
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case eSymbolTypeObjCClass: return eAddressClassRuntime;
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case eSymbolTypeObjCMetaClass: return eAddressClassRuntime;
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case eSymbolTypeObjCIVar: return eAddressClassRuntime;
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}
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}
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}
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return eAddressClassUnknown;
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}
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size_t
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ObjectFile::GetData (off_t offset, size_t length, DataExtractor &data) const
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{
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// The entire file has already been mmap'ed into m_data, so just copy from there
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// as the back mmap buffer will be shared with shared pointers.
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return data.SetData (m_data, offset, length);
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}
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size_t
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ObjectFile::CopyData (off_t offset, size_t length, void *dst) const
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{
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// The entire file has already been mmap'ed into m_data, so just copy from there
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return m_data.CopyByteOrderedData (offset, length, dst, length, lldb::endian::InlHostByteOrder());
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}
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