diff options
Diffstat (limited to 'contrib/llvm/tools/lldb/source/Symbol/ObjectFile.cpp')
| -rw-r--r-- | contrib/llvm/tools/lldb/source/Symbol/ObjectFile.cpp | 621 |
1 files changed, 621 insertions, 0 deletions
diff --git a/contrib/llvm/tools/lldb/source/Symbol/ObjectFile.cpp b/contrib/llvm/tools/lldb/source/Symbol/ObjectFile.cpp new file mode 100644 index 0000000..0c61591 --- /dev/null +++ b/contrib/llvm/tools/lldb/source/Symbol/ObjectFile.cpp @@ -0,0 +1,621 @@ +//===-- ObjectFile.cpp ------------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "lldb/lldb-private.h" +#include "lldb/lldb-private-log.h" +#include "lldb/Core/DataBuffer.h" +#include "lldb/Core/DataBufferHeap.h" +#include "lldb/Core/Log.h" +#include "lldb/Core/Module.h" +#include "lldb/Core/ModuleSpec.h" +#include "lldb/Core/PluginManager.h" +#include "lldb/Core/RegularExpression.h" +#include "lldb/Core/Section.h" +#include "lldb/Core/Timer.h" +#include "lldb/Symbol/ObjectFile.h" +#include "lldb/Symbol/ObjectContainer.h" +#include "lldb/Symbol/SymbolFile.h" +#include "lldb/Target/Process.h" +#include "Plugins/ObjectContainer/BSD-Archive/ObjectContainerBSDArchive.h" + +using namespace lldb; +using namespace lldb_private; + +ObjectFileSP +ObjectFile::FindPlugin (const lldb::ModuleSP &module_sp, + const FileSpec* file, + lldb::offset_t file_offset, + lldb::offset_t file_size, + DataBufferSP &data_sp, + lldb::offset_t &data_offset) +{ + ObjectFileSP object_file_sp; + + if (module_sp) + { + Timer scoped_timer (__PRETTY_FUNCTION__, + "ObjectFile::FindPlugin (module = %s, file = %p, file_offset = 0x%8.8" PRIx64 ", file_size = 0x%8.8" PRIx64 ")", + module_sp->GetFileSpec().GetPath().c_str(), + file, (uint64_t) file_offset, (uint64_t) file_size); + if (file) + { + FileSpec archive_file; + ObjectContainerCreateInstance create_object_container_callback; + + const bool file_exists = file->Exists(); + if (!data_sp) + { + // We have an object name which most likely means we have + // a .o file in a static archive (.a file). Try and see if + // we have a cached archive first without reading any data + // first + if (file_exists && module_sp->GetObjectName()) + { + for (uint32_t idx = 0; (create_object_container_callback = PluginManager::GetObjectContainerCreateCallbackAtIndex(idx)) != NULL; ++idx) + { + std::unique_ptr<ObjectContainer> object_container_ap(create_object_container_callback(module_sp, data_sp, data_offset, file, file_offset, file_size)); + + if (object_container_ap.get()) + object_file_sp = object_container_ap->GetObjectFile(file); + + if (object_file_sp.get()) + return object_file_sp; + } + } + // Ok, we didn't find any containers that have a named object, now + // lets read the first 512 bytes from the file so the object file + // and object container plug-ins can use these bytes to see if they + // can parse this file. + if (file_size > 0) + { + data_sp = file->ReadFileContents(file_offset, std::min<size_t>(512, file_size)); + data_offset = 0; + } + } + + if (!data_sp || data_sp->GetByteSize() == 0) + { + // Check for archive file with format "/path/to/archive.a(object.o)" + char path_with_object[PATH_MAX*2]; + module_sp->GetFileSpec().GetPath(path_with_object, sizeof(path_with_object)); + + ConstString archive_object; + const bool must_exist = true; + if (ObjectFile::SplitArchivePathWithObject (path_with_object, archive_file, archive_object, must_exist)) + { + file_size = archive_file.GetByteSize(); + if (file_size > 0) + { + file = &archive_file; + module_sp->SetFileSpecAndObjectName (archive_file, archive_object); + // Check if this is a object container by iterating through all object + // container plugin instances and then trying to get an object file + // from the container plugins since we had a name. Also, don't read + // ANY data in case there is data cached in the container plug-ins + // (like BSD archives caching the contained objects within an file). + for (uint32_t idx = 0; (create_object_container_callback = PluginManager::GetObjectContainerCreateCallbackAtIndex(idx)) != NULL; ++idx) + { + std::unique_ptr<ObjectContainer> object_container_ap(create_object_container_callback(module_sp, data_sp, data_offset, file, file_offset, file_size)); + + if (object_container_ap.get()) + object_file_sp = object_container_ap->GetObjectFile(file); + + if (object_file_sp.get()) + return object_file_sp; + } + // We failed to find any cached object files in the container + // plug-ins, so lets read the first 512 bytes and try again below... + data_sp = archive_file.ReadFileContents(file_offset, 512); + } + } + } + + if (data_sp && data_sp->GetByteSize() > 0) + { + // Check if this is a normal object file by iterating through + // all object file plugin instances. + ObjectFileCreateInstance create_object_file_callback; + for (uint32_t idx = 0; (create_object_file_callback = PluginManager::GetObjectFileCreateCallbackAtIndex(idx)) != NULL; ++idx) + { + object_file_sp.reset (create_object_file_callback(module_sp, data_sp, data_offset, file, file_offset, file_size)); + if (object_file_sp.get()) + return object_file_sp; + } + + // Check if this is a object container by iterating through + // all object container plugin instances and then trying to get + // an object file from the container. + for (uint32_t idx = 0; (create_object_container_callback = PluginManager::GetObjectContainerCreateCallbackAtIndex(idx)) != NULL; ++idx) + { + std::unique_ptr<ObjectContainer> object_container_ap(create_object_container_callback(module_sp, data_sp, data_offset, file, file_offset, file_size)); + + if (object_container_ap.get()) + object_file_sp = object_container_ap->GetObjectFile(file); + + if (object_file_sp.get()) + return object_file_sp; + } + } + } + } + // We didn't find it, so clear our shared pointer in case it + // contains anything and return an empty shared pointer + object_file_sp.reset(); + return object_file_sp; +} + +ObjectFileSP +ObjectFile::FindPlugin (const lldb::ModuleSP &module_sp, + const ProcessSP &process_sp, + lldb::addr_t header_addr, + DataBufferSP &data_sp) +{ + ObjectFileSP object_file_sp; + + if (module_sp) + { + Timer scoped_timer (__PRETTY_FUNCTION__, + "ObjectFile::FindPlugin (module = %s, process = %p, header_addr = 0x%" PRIx64 ")", + module_sp->GetFileSpec().GetPath().c_str(), + process_sp.get(), header_addr); + uint32_t idx; + + // Check if this is a normal object file by iterating through + // all object file plugin instances. + ObjectFileCreateMemoryInstance create_callback; + for (idx = 0; (create_callback = PluginManager::GetObjectFileCreateMemoryCallbackAtIndex(idx)) != NULL; ++idx) + { + object_file_sp.reset (create_callback(module_sp, data_sp, process_sp, header_addr)); + if (object_file_sp.get()) + return object_file_sp; + } + + } + // We didn't find it, so clear our shared pointer in case it + // contains anything and return an empty shared pointer + object_file_sp.reset(); + return object_file_sp; +} + +size_t +ObjectFile::GetModuleSpecifications (const FileSpec &file, + lldb::offset_t file_offset, + lldb::offset_t file_size, + ModuleSpecList &specs) +{ + DataBufferSP data_sp (file.ReadFileContents(file_offset, 512)); + if (data_sp) + { + if (file_size == 0) + { + const lldb::offset_t actual_file_size = file.GetByteSize(); + if (actual_file_size > file_offset) + file_size = actual_file_size - file_offset; + } + return ObjectFile::GetModuleSpecifications (file, // file spec + data_sp, // data bytes + 0, // data offset + file_offset,// file offset + file_size, // file length + specs); + } + return 0; +} + +size_t +ObjectFile::GetModuleSpecifications (const lldb_private::FileSpec& file, + lldb::DataBufferSP& data_sp, + lldb::offset_t data_offset, + lldb::offset_t file_offset, + lldb::offset_t file_size, + lldb_private::ModuleSpecList &specs) +{ + const size_t initial_count = specs.GetSize(); + ObjectFileGetModuleSpecifications callback; + uint32_t i; + // Try the ObjectFile plug-ins + for (i = 0; (callback = PluginManager::GetObjectFileGetModuleSpecificationsCallbackAtIndex(i)) != NULL; ++i) + { + if (callback (file, data_sp, data_offset, file_offset, file_size, specs) > 0) + return specs.GetSize() - initial_count; + } + + // Try the ObjectContainer plug-ins + for (i = 0; (callback = PluginManager::GetObjectContainerGetModuleSpecificationsCallbackAtIndex(i)) != NULL; ++i) + { + if (callback (file, data_sp, data_offset, file_offset, file_size, specs) > 0) + return specs.GetSize() - initial_count; + } + return 0; +} + +ObjectFile::ObjectFile (const lldb::ModuleSP &module_sp, + const FileSpec *file_spec_ptr, + lldb::offset_t file_offset, + lldb::offset_t length, + lldb::DataBufferSP& data_sp, + lldb::offset_t data_offset +) : + ModuleChild (module_sp), + m_file (), // This file could be different from the original module's file + m_type (eTypeInvalid), + m_strata (eStrataInvalid), + m_file_offset (file_offset), + m_length (length), + m_data (), + m_unwind_table (*this), + m_process_wp(), + m_memory_addr (LLDB_INVALID_ADDRESS), + m_sections_ap(), + m_symtab_ap () +{ + if (file_spec_ptr) + m_file = *file_spec_ptr; + if (data_sp) + m_data.SetData (data_sp, data_offset, length); + Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT)); + if (log) + { + if (m_file) + { + log->Printf ("%p ObjectFile::ObjectFile() module = %p (%s), file = %s, file_offset = 0x%8.8" PRIx64 ", size = %" PRIu64, + this, + module_sp.get(), + module_sp->GetSpecificationDescription().c_str(), + m_file.GetPath().c_str(), + m_file_offset, + m_length); + } + else + { + log->Printf ("%p ObjectFile::ObjectFile() module = %p (%s), file = <NULL>, file_offset = 0x%8.8" PRIx64 ", size = %" PRIu64, + this, + module_sp.get(), + module_sp->GetSpecificationDescription().c_str(), + m_file_offset, + m_length); + } + } +} + + +ObjectFile::ObjectFile (const lldb::ModuleSP &module_sp, + const ProcessSP &process_sp, + lldb::addr_t header_addr, + DataBufferSP& header_data_sp) : + ModuleChild (module_sp), + m_file (), + m_type (eTypeInvalid), + m_strata (eStrataInvalid), + m_file_offset (0), + m_length (0), + m_data (), + m_unwind_table (*this), + m_process_wp (process_sp), + m_memory_addr (header_addr), + m_sections_ap(), + m_symtab_ap () +{ + if (header_data_sp) + m_data.SetData (header_data_sp, 0, header_data_sp->GetByteSize()); + Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT)); + if (log) + { + log->Printf ("%p ObjectFile::ObjectFile() module = %p (%s), process = %p, header_addr = 0x%" PRIx64, + this, + module_sp.get(), + module_sp->GetSpecificationDescription().c_str(), + process_sp.get(), + m_memory_addr); + } +} + + +ObjectFile::~ObjectFile() +{ + Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT)); + if (log) + log->Printf ("%p ObjectFile::~ObjectFile ()\n", this); +} + +bool +ObjectFile::SetModulesArchitecture (const ArchSpec &new_arch) +{ + ModuleSP module_sp (GetModule()); + if (module_sp) + return module_sp->SetArchitecture (new_arch); + return false; +} + +AddressClass +ObjectFile::GetAddressClass (addr_t file_addr) +{ + Symtab *symtab = GetSymtab(); + if (symtab) + { + Symbol *symbol = symtab->FindSymbolContainingFileAddress(file_addr); + if (symbol) + { + if (symbol->ValueIsAddress()) + { + const SectionSP section_sp (symbol->GetAddress().GetSection()); + if (section_sp) + { + const SectionType section_type = section_sp->GetType(); + switch (section_type) + { + case eSectionTypeInvalid: return eAddressClassUnknown; + case eSectionTypeCode: return eAddressClassCode; + case eSectionTypeContainer: return eAddressClassUnknown; + case eSectionTypeData: + case eSectionTypeDataCString: + case eSectionTypeDataCStringPointers: + case eSectionTypeDataSymbolAddress: + case eSectionTypeData4: + case eSectionTypeData8: + case eSectionTypeData16: + case eSectionTypeDataPointers: + case eSectionTypeZeroFill: + case eSectionTypeDataObjCMessageRefs: + case eSectionTypeDataObjCCFStrings: + return eAddressClassData; + case eSectionTypeDebug: + case eSectionTypeDWARFDebugAbbrev: + case eSectionTypeDWARFDebugAranges: + case eSectionTypeDWARFDebugFrame: + case eSectionTypeDWARFDebugInfo: + case eSectionTypeDWARFDebugLine: + case eSectionTypeDWARFDebugLoc: + case eSectionTypeDWARFDebugMacInfo: + case eSectionTypeDWARFDebugPubNames: + case eSectionTypeDWARFDebugPubTypes: + case eSectionTypeDWARFDebugRanges: + case eSectionTypeDWARFDebugStr: + case eSectionTypeDWARFAppleNames: + case eSectionTypeDWARFAppleTypes: + case eSectionTypeDWARFAppleNamespaces: + case eSectionTypeDWARFAppleObjC: + return eAddressClassDebug; + case eSectionTypeEHFrame: return eAddressClassRuntime; + case eSectionTypeELFSymbolTable: + case eSectionTypeELFDynamicSymbols: + case eSectionTypeELFRelocationEntries: + case eSectionTypeELFDynamicLinkInfo: + case eSectionTypeOther: return eAddressClassUnknown; + } + } + } + + const SymbolType symbol_type = symbol->GetType(); + switch (symbol_type) + { + case eSymbolTypeAny: return eAddressClassUnknown; + case eSymbolTypeAbsolute: return eAddressClassUnknown; + case eSymbolTypeCode: return eAddressClassCode; + case eSymbolTypeTrampoline: return eAddressClassCode; + case eSymbolTypeResolver: return eAddressClassCode; + case eSymbolTypeData: return eAddressClassData; + case eSymbolTypeRuntime: return eAddressClassRuntime; + case eSymbolTypeException: return eAddressClassRuntime; + case eSymbolTypeSourceFile: return eAddressClassDebug; + case eSymbolTypeHeaderFile: return eAddressClassDebug; + case eSymbolTypeObjectFile: return eAddressClassDebug; + case eSymbolTypeCommonBlock: return eAddressClassDebug; + case eSymbolTypeBlock: return eAddressClassDebug; + case eSymbolTypeLocal: return eAddressClassData; + case eSymbolTypeParam: return eAddressClassData; + case eSymbolTypeVariable: return eAddressClassData; + case eSymbolTypeVariableType: return eAddressClassDebug; + case eSymbolTypeLineEntry: return eAddressClassDebug; + case eSymbolTypeLineHeader: return eAddressClassDebug; + case eSymbolTypeScopeBegin: return eAddressClassDebug; + case eSymbolTypeScopeEnd: return eAddressClassDebug; + case eSymbolTypeAdditional: return eAddressClassUnknown; + case eSymbolTypeCompiler: return eAddressClassDebug; + case eSymbolTypeInstrumentation:return eAddressClassDebug; + case eSymbolTypeUndefined: return eAddressClassUnknown; + case eSymbolTypeObjCClass: return eAddressClassRuntime; + case eSymbolTypeObjCMetaClass: return eAddressClassRuntime; + case eSymbolTypeObjCIVar: return eAddressClassRuntime; + } + } + } + return eAddressClassUnknown; +} + +DataBufferSP +ObjectFile::ReadMemory (const ProcessSP &process_sp, lldb::addr_t addr, size_t byte_size) +{ + DataBufferSP data_sp; + if (process_sp) + { + std::unique_ptr<DataBufferHeap> data_ap (new DataBufferHeap (byte_size, 0)); + Error error; + const size_t bytes_read = process_sp->ReadMemory (addr, + data_ap->GetBytes(), + data_ap->GetByteSize(), + error); + if (bytes_read == byte_size) + data_sp.reset (data_ap.release()); + } + return data_sp; +} + +size_t +ObjectFile::GetData (off_t offset, size_t length, DataExtractor &data) const +{ + // The entire file has already been mmap'ed into m_data, so just copy from there + // as the back mmap buffer will be shared with shared pointers. + return data.SetData (m_data, offset, length); +} + +size_t +ObjectFile::CopyData (off_t offset, size_t length, void *dst) const +{ + // The entire file has already been mmap'ed into m_data, so just copy from there + return m_data.CopyByteOrderedData (offset, length, dst, length, lldb::endian::InlHostByteOrder()); +} + + +size_t +ObjectFile::ReadSectionData (const Section *section, off_t section_offset, void *dst, size_t dst_len) const +{ + // If some other objectfile owns this data, pass this to them. + if (section->GetObjectFile() != this) + return section->GetObjectFile()->ReadSectionData (section, section_offset, dst, dst_len); + + if (IsInMemory()) + { + ProcessSP process_sp (m_process_wp.lock()); + if (process_sp) + { + Error error; + const addr_t base_load_addr = section->GetLoadBaseAddress (&process_sp->GetTarget()); + if (base_load_addr != LLDB_INVALID_ADDRESS) + return process_sp->ReadMemory (base_load_addr + section_offset, dst, dst_len, error); + } + } + else + { + const uint64_t section_file_size = section->GetFileSize(); + if (section_offset < section_file_size) + { + const uint64_t section_bytes_left = section_file_size - section_offset; + uint64_t section_dst_len = dst_len; + if (section_dst_len > section_bytes_left) + section_dst_len = section_bytes_left; + return CopyData (section->GetFileOffset() + section_offset, section_dst_len, dst); + } + else + { + if (section->GetType() == eSectionTypeZeroFill) + { + const uint64_t section_size = section->GetByteSize(); + const uint64_t section_bytes_left = section_size - section_offset; + uint64_t section_dst_len = dst_len; + if (section_dst_len > section_bytes_left) + section_dst_len = section_bytes_left; + bzero(dst, section_dst_len); + return section_dst_len; + } + } + } + return 0; +} + +//---------------------------------------------------------------------- +// Get the section data the file on disk +//---------------------------------------------------------------------- +size_t +ObjectFile::ReadSectionData (const Section *section, DataExtractor& section_data) const +{ + // If some other objectfile owns this data, pass this to them. + if (section->GetObjectFile() != this) + return section->GetObjectFile()->ReadSectionData (section, section_data); + + if (IsInMemory()) + { + ProcessSP process_sp (m_process_wp.lock()); + if (process_sp) + { + const addr_t base_load_addr = section->GetLoadBaseAddress (&process_sp->GetTarget()); + if (base_load_addr != LLDB_INVALID_ADDRESS) + { + DataBufferSP data_sp (ReadMemory (process_sp, base_load_addr, section->GetByteSize())); + if (data_sp) + { + section_data.SetData (data_sp, 0, data_sp->GetByteSize()); + section_data.SetByteOrder (process_sp->GetByteOrder()); + section_data.SetAddressByteSize (process_sp->GetAddressByteSize()); + return section_data.GetByteSize(); + } + } + } + } + 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 some other objectfile owns this data, pass this to them. + if (section->GetObjectFile() != this) + return section->GetObjectFile()->MemoryMapSectionData (section, section_data); + + 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("(.*)\\(([^\\)]+)\\)$"); + RegularExpression::Match regex_match(2); + if (g_object_regex.Execute (path_with_object, ®ex_match)) + { + std::string path; + std::string obj; + if (regex_match.GetMatchAtIndex (path_with_object, 1, path) && + regex_match.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; +} + +void +ObjectFile::ClearSymtab () +{ + ModuleSP module_sp(GetModule()); + if (module_sp) + { + lldb_private::Mutex::Locker locker(module_sp->GetMutex()); + Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT)); + if (log) + { + log->Printf ("%p ObjectFile::ClearSymtab () symtab = %p", + this, + m_symtab_ap.get()); + } + m_symtab_ap.reset(); + } +} + +SectionList * +ObjectFile::GetSectionList() +{ + if (m_sections_ap.get() == NULL) + { + ModuleSP module_sp(GetModule()); + if (module_sp) + CreateSections(*module_sp->GetUnifiedSectionList()); + } + return m_sections_ap.get(); +} |
