forked from OSchip/llvm-project
522 lines
22 KiB
C++
522 lines
22 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/DataBufferHeap.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/Section.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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#include "lldb/Target/Process.h"
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#include "Plugins/ObjectContainer/BSD-Archive/ObjectContainerBSDArchive.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 (const lldb::ModuleSP &module_sp,
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const FileSpec* file,
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lldb::offset_t file_offset,
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lldb::offset_t file_size,
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DataBufferSP &data_sp,
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lldb::offset_t &data_offset)
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{
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ObjectFileSP object_file_sp;
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if (module_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%8.8" PRIx64 ", file_size = 0x%8.8" PRIx64 ")",
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module_sp->GetFileSpec().GetDirectory().AsCString(),
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module_sp->GetFileSpec().GetFilename().AsCString(),
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file, (uint64_t) file_offset, (uint64_t) file_size);
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if (file)
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{
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FileSpec archive_file;
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ObjectContainerCreateInstance create_object_container_callback;
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const bool file_exists = file->Exists();
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if (!data_sp)
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{
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// We have an object name which most likely means we have
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// a .o file in a static archive (.a file). Try and see if
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// we have a cached archive first without reading any data
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// first
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if (file_exists && module_sp->GetObjectName())
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{
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for (uint32_t 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_sp, data_sp, data_offset, 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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// Ok, we didn't find any containers that have a named object, now
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// lets read the first 512 bytes from the file so the object file
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// and object container plug-ins can use these bytes to see if they
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// can parse this file.
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if (file_size > 0)
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{
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data_sp = file->ReadFileContents(file_offset, std::min<size_t>(512, file_size));
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data_offset = 0;
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}
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}
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if (!data_sp || 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_sp->GetFileSpec().GetPath(path_with_object, sizeof(path_with_object));
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ConstString archive_object;
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const bool must_exist = true;
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if (ObjectFile::SplitArchivePathWithObject (path_with_object, archive_file, archive_object, must_exist))
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{
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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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file = &archive_file;
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module_sp->SetFileSpecAndObjectName (archive_file, archive_object);
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// Check if this is a object container by iterating through all object
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// container plugin instances and then trying to get an object file
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// from the container plugins since we had a name. Also, don't read
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// ANY data in case there is data cached in the container plug-ins
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// (like BSD archives caching the contained objects within an file).
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for (uint32_t 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_sp, data_sp, data_offset, 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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// We failed to find any cached object files in the container
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// plug-ins, so lets read the first 512 bytes and try again below...
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data_sp = archive_file.ReadFileContents(file_offset, 512);
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}
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}
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}
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if (data_sp && data_sp->GetByteSize() > 0)
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{
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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 (uint32_t 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_sp, data_sp, data_offset, 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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for (uint32_t 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_sp, data_sp, data_offset, 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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ObjectFileSP
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ObjectFile::FindPlugin (const lldb::ModuleSP &module_sp,
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const ProcessSP &process_sp,
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lldb::addr_t header_addr,
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DataBufferSP &data_sp)
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{
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ObjectFileSP object_file_sp;
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if (module_sp)
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{
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Timer scoped_timer (__PRETTY_FUNCTION__,
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"ObjectFile::FindPlugin (module = %s/%s, process = %p, header_addr = 0x%" PRIx64 ")",
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module_sp->GetFileSpec().GetDirectory().AsCString(),
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module_sp->GetFileSpec().GetFilename().AsCString(),
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process_sp.get(), header_addr);
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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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ObjectFileCreateMemoryInstance create_callback;
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for (idx = 0; (create_callback = PluginManager::GetObjectFileCreateMemoryCallbackAtIndex(idx)) != NULL; ++idx)
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{
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object_file_sp.reset (create_callback(module_sp, data_sp, process_sp, header_addr));
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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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// 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 (const lldb::ModuleSP &module_sp,
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const FileSpec *file_spec_ptr,
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lldb::offset_t file_offset,
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lldb::offset_t length,
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lldb::DataBufferSP& data_sp,
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lldb::offset_t data_offset
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) :
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ModuleChild (module_sp),
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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_file_offset (file_offset),
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m_length (length),
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m_data (),
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m_unwind_table (*this),
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m_process_wp(),
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m_memory_addr (LLDB_INVALID_ADDRESS)
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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 (data_sp)
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m_data.SetData (data_sp, data_offset, length);
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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, file_offset = 0x%8.8" PRIx64 ", size = %" PRIu64 "\n",
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this,
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module_sp->GetFileSpec().GetDirectory().AsCString(),
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module_sp->GetFileSpec().GetFilename().AsCString(),
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m_file.GetDirectory().AsCString(),
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m_file.GetFilename().AsCString(),
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m_file_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>, file_offset = 0x%8.8" PRIx64 ", size = %" PRIu64 "\n",
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this,
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module_sp->GetFileSpec().GetDirectory().AsCString(),
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module_sp->GetFileSpec().GetFilename().AsCString(),
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m_file_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 (const lldb::ModuleSP &module_sp,
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const ProcessSP &process_sp,
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lldb::addr_t header_addr,
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DataBufferSP& header_data_sp) :
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ModuleChild (module_sp),
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m_file (),
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m_type (eTypeInvalid),
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m_strata (eStrataInvalid),
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m_file_offset (0),
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m_length (0),
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m_data (),
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m_unwind_table (*this),
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m_process_wp (process_sp),
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m_memory_addr (header_addr)
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{
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if (header_data_sp)
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m_data.SetData (header_data_sp, 0, header_data_sp->GetByteSize());
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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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log->Printf ("%p ObjectFile::ObjectFile () module = %s/%s, process = %p, header_addr = 0x%" PRIx64 "\n",
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this,
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module_sp->GetFileSpec().GetDirectory().AsCString(),
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module_sp->GetFileSpec().GetFilename().AsCString(),
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process_sp.get(),
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m_memory_addr);
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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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log->Printf ("%p ObjectFile::~ObjectFile ()\n", this);
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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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ModuleSP module_sp (GetModule());
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if (module_sp)
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return module_sp->SetArchitecture (new_arch);
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return false;
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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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if (symbol->ValueIsAddress())
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{
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const SectionSP section_sp (symbol->GetAddress().GetSection());
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if (section_sp)
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{
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const SectionType section_type = section_sp->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 eSymbolTypeResolver: 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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DataBufferSP
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ObjectFile::ReadMemory (const ProcessSP &process_sp, lldb::addr_t addr, size_t byte_size)
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{
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DataBufferSP data_sp;
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if (process_sp)
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{
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std::auto_ptr<DataBufferHeap> data_ap (new DataBufferHeap (byte_size, 0));
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Error error;
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const size_t bytes_read = process_sp->ReadMemory (addr,
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data_ap->GetBytes(),
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data_ap->GetByteSize(),
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error);
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if (bytes_read == byte_size)
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data_sp.reset (data_ap.release());
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}
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return data_sp;
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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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size_t
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ObjectFile::ReadSectionData (const Section *section, off_t section_offset, void *dst, size_t dst_len) const
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{
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if (IsInMemory())
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{
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ProcessSP process_sp (m_process_wp.lock());
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if (process_sp)
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{
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Error error;
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const addr_t base_load_addr = section->GetLoadBaseAddress (&process_sp->GetTarget());
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if (base_load_addr != LLDB_INVALID_ADDRESS)
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return process_sp->ReadMemory (base_load_addr + section_offset, dst, dst_len, error);
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}
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}
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else
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{
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const uint64_t section_file_size = section->GetFileSize();
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if (section_offset < section_file_size)
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{
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const uint64_t section_bytes_left = section_file_size - section_offset;
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uint64_t section_dst_len = dst_len;
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if (section_dst_len > section_bytes_left)
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section_dst_len = section_bytes_left;
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return CopyData (section->GetFileOffset() + section_offset, section_dst_len, dst);
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}
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else
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{
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if (section->GetType() == eSectionTypeZeroFill)
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{
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const uint64_t section_size = section->GetByteSize();
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const uint64_t section_bytes_left = section_size - section_offset;
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uint64_t section_dst_len = dst_len;
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if (section_dst_len > section_bytes_left)
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section_dst_len = section_bytes_left;
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bzero(dst, section_dst_len);
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return section_dst_len;
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}
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}
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}
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return 0;
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}
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//----------------------------------------------------------------------
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// Get the section data the file on disk
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//----------------------------------------------------------------------
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size_t
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ObjectFile::ReadSectionData (const Section *section, DataExtractor& section_data) const
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{
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if (IsInMemory())
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{
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ProcessSP process_sp (m_process_wp.lock());
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if (process_sp)
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{
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const addr_t base_load_addr = section->GetLoadBaseAddress (&process_sp->GetTarget());
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if (base_load_addr != LLDB_INVALID_ADDRESS)
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{
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DataBufferSP data_sp (ReadMemory (process_sp, base_load_addr, section->GetByteSize()));
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if (data_sp)
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{
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section_data.SetData (data_sp, 0, data_sp->GetByteSize());
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section_data.SetByteOrder (process_sp->GetByteOrder());
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section_data.SetAddressByteSize (process_sp->GetAddressByteSize());
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return section_data.GetByteSize();
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}
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}
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}
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}
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else
|
|
{
|
|
// The object file now contains a full mmap'ed copy of the object file data, so just use this
|
|
return MemoryMapSectionData (section, section_data);
|
|
}
|
|
section_data.Clear();
|
|
return 0;
|
|
}
|
|
|
|
size_t
|
|
ObjectFile::MemoryMapSectionData (const Section *section, DataExtractor& section_data) const
|
|
{
|
|
if (IsInMemory())
|
|
{
|
|
return ReadSectionData (section, section_data);
|
|
}
|
|
else
|
|
{
|
|
// The object file now contains a full mmap'ed copy of the object file data, so just use this
|
|
return GetData(section->GetFileOffset(), section->GetFileSize(), section_data);
|
|
}
|
|
section_data.Clear();
|
|
return 0;
|
|
}
|
|
|
|
|
|
bool
|
|
ObjectFile::SplitArchivePathWithObject (const char *path_with_object, FileSpec &archive_file, ConstString &archive_object, bool must_exist)
|
|
{
|
|
RegularExpression g_object_regex("(.*)\\(([^\\)]+)\\)$");
|
|
if (g_object_regex.Execute (path_with_object, 2))
|
|
{
|
|
std::string path;
|
|
std::string obj;
|
|
if (g_object_regex.GetMatchAtIndex (path_with_object, 1, path) &&
|
|
g_object_regex.GetMatchAtIndex (path_with_object, 2, obj))
|
|
{
|
|
archive_file.SetFile (path.c_str(), false);
|
|
archive_object.SetCString(obj.c_str());
|
|
if (must_exist && !archive_file.Exists())
|
|
return false;
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|