ObjectFileJIT.cpp revision 276479
1//===-- ObjectFileJIT.cpp ---------------------------------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10#include "llvm/ADT/StringRef.h" 11 12#include "ObjectFileJIT.h" 13 14#include "lldb/lldb-private-log.h" 15#include "lldb/Core/ArchSpec.h" 16#include "lldb/Core/DataBuffer.h" 17#include "lldb/Core/DataBufferHeap.h" 18#include "lldb/Core/Debugger.h" 19#include "lldb/Core/FileSpecList.h" 20#include "lldb/Core/Log.h" 21#include "lldb/Core/Module.h" 22#include "lldb/Core/ModuleSpec.h" 23#include "lldb/Core/PluginManager.h" 24#include "lldb/Core/RangeMap.h" 25#include "lldb/Core/Section.h" 26#include "lldb/Core/StreamFile.h" 27#include "lldb/Core/StreamString.h" 28#include "lldb/Core/Timer.h" 29#include "lldb/Core/UUID.h" 30#include "lldb/Host/Host.h" 31#include "lldb/Host/FileSpec.h" 32#include "lldb/Symbol/ObjectFile.h" 33#include "lldb/Target/Platform.h" 34#include "lldb/Target/Process.h" 35#include "lldb/Target/SectionLoadList.h" 36#include "lldb/Target/Target.h" 37 38#ifndef __APPLE__ 39#include "Utility/UuidCompatibility.h" 40#endif 41 42using namespace lldb; 43using namespace lldb_private; 44 45 46void 47ObjectFileJIT::Initialize() 48{ 49 PluginManager::RegisterPlugin (GetPluginNameStatic(), 50 GetPluginDescriptionStatic(), 51 CreateInstance, 52 CreateMemoryInstance, 53 GetModuleSpecifications); 54} 55 56void 57ObjectFileJIT::Terminate() 58{ 59 PluginManager::UnregisterPlugin (CreateInstance); 60} 61 62 63lldb_private::ConstString 64ObjectFileJIT::GetPluginNameStatic() 65{ 66 static ConstString g_name("jit"); 67 return g_name; 68} 69 70const char * 71ObjectFileJIT::GetPluginDescriptionStatic() 72{ 73 return "JIT code object file"; 74} 75 76ObjectFile * 77ObjectFileJIT::CreateInstance (const lldb::ModuleSP &module_sp, 78 DataBufferSP& data_sp, 79 lldb::offset_t data_offset, 80 const FileSpec* file, 81 lldb::offset_t file_offset, 82 lldb::offset_t length) 83{ 84 // JIT'ed object file is backed by the ObjectFileJITDelegate, never 85 // read from a file 86 return NULL; 87} 88 89ObjectFile * 90ObjectFileJIT::CreateMemoryInstance (const lldb::ModuleSP &module_sp, 91 DataBufferSP& data_sp, 92 const ProcessSP &process_sp, 93 lldb::addr_t header_addr) 94{ 95 // JIT'ed object file is backed by the ObjectFileJITDelegate, never 96 // read from memory 97 return NULL; 98} 99 100size_t 101ObjectFileJIT::GetModuleSpecifications (const lldb_private::FileSpec& file, 102 lldb::DataBufferSP& data_sp, 103 lldb::offset_t data_offset, 104 lldb::offset_t file_offset, 105 lldb::offset_t length, 106 lldb_private::ModuleSpecList &specs) 107{ 108 // JIT'ed object file can't be read from a file on disk 109 return 0; 110} 111 112ObjectFileJIT::ObjectFileJIT (const lldb::ModuleSP &module_sp, 113 const ObjectFileJITDelegateSP &delegate_sp) : 114 ObjectFile(module_sp, NULL, 0, 0, DataBufferSP(), 0), 115 m_delegate_wp () 116{ 117 if (delegate_sp) 118 { 119 m_delegate_wp = delegate_sp; 120 m_data.SetByteOrder(delegate_sp->GetByteOrder()); 121 m_data.SetAddressByteSize(delegate_sp->GetAddressByteSize()); 122 } 123} 124 125ObjectFileJIT::~ObjectFileJIT() 126{ 127} 128 129 130bool 131ObjectFileJIT::ParseHeader () 132{ 133 // JIT code is never in a file, nor is it required to have any header 134 return false; 135} 136 137ByteOrder 138ObjectFileJIT::GetByteOrder () const 139{ 140 return m_data.GetByteOrder(); 141} 142 143bool 144ObjectFileJIT::IsExecutable() const 145{ 146 return false; 147} 148 149uint32_t 150ObjectFileJIT::GetAddressByteSize () const 151{ 152 return m_data.GetAddressByteSize(); 153} 154 155 156Symtab * 157ObjectFileJIT::GetSymtab() 158{ 159 ModuleSP module_sp(GetModule()); 160 if (module_sp) 161 { 162 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 163 if (m_symtab_ap.get() == NULL) 164 { 165 m_symtab_ap.reset(new Symtab(this)); 166 Mutex::Locker symtab_locker (m_symtab_ap->GetMutex()); 167 ObjectFileJITDelegateSP delegate_sp (m_delegate_wp.lock()); 168 if (delegate_sp) 169 delegate_sp->PopulateSymtab(this, *m_symtab_ap); 170 // TODO: get symbols from delegate 171 m_symtab_ap->Finalize (); 172 } 173 } 174 return m_symtab_ap.get(); 175} 176 177bool 178ObjectFileJIT::IsStripped () 179{ 180 return false; // JIT code that is in a module is never stripped 181} 182 183void 184ObjectFileJIT::CreateSections (SectionList &unified_section_list) 185{ 186 if (!m_sections_ap.get()) 187 { 188 m_sections_ap.reset(new SectionList()); 189 ObjectFileJITDelegateSP delegate_sp (m_delegate_wp.lock()); 190 if (delegate_sp) 191 { 192 delegate_sp->PopulateSectionList(this, *m_sections_ap); 193 unified_section_list = *m_sections_ap; 194 } 195 } 196} 197 198void 199ObjectFileJIT::Dump (Stream *s) 200{ 201 ModuleSP module_sp(GetModule()); 202 if (module_sp) 203 { 204 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 205 s->Printf("%p: ", static_cast<void*>(this)); 206 s->Indent(); 207 s->PutCString("ObjectFileJIT"); 208 209 ArchSpec arch; 210 if (GetArchitecture(arch)) 211 *s << ", arch = " << arch.GetArchitectureName(); 212 213 s->EOL(); 214 215 SectionList *sections = GetSectionList(); 216 if (sections) 217 sections->Dump(s, NULL, true, UINT32_MAX); 218 219 if (m_symtab_ap.get()) 220 m_symtab_ap->Dump(s, NULL, eSortOrderNone); 221 } 222} 223 224bool 225ObjectFileJIT::GetUUID (lldb_private::UUID* uuid) 226{ 227 // TODO: maybe get from delegate, not needed for first pass 228 return false; 229} 230 231 232uint32_t 233ObjectFileJIT::GetDependentModules (FileSpecList& files) 234{ 235 // JIT modules don't have dependencies, but they could 236 // if external functions are called and we know where they are 237 files.Clear(); 238 return 0; 239} 240 241lldb_private::Address 242ObjectFileJIT::GetEntryPointAddress () 243{ 244 return Address(); 245} 246 247lldb_private::Address 248ObjectFileJIT::GetHeaderAddress () 249{ 250 return Address(); 251} 252 253 254 255ObjectFile::Type 256ObjectFileJIT::CalculateType() 257{ 258 return eTypeJIT; 259} 260 261ObjectFile::Strata 262ObjectFileJIT::CalculateStrata() 263{ 264 return eStrataJIT; 265} 266 267 268bool 269ObjectFileJIT::GetArchitecture (ArchSpec &arch) 270{ 271 ObjectFileJITDelegateSP delegate_sp (m_delegate_wp.lock()); 272 if (delegate_sp) 273 return delegate_sp->GetArchitecture(arch); 274 return false; 275} 276 277//------------------------------------------------------------------ 278// PluginInterface protocol 279//------------------------------------------------------------------ 280lldb_private::ConstString 281ObjectFileJIT::GetPluginName() 282{ 283 return GetPluginNameStatic(); 284} 285 286uint32_t 287ObjectFileJIT::GetPluginVersion() 288{ 289 return 1; 290} 291 292 293bool 294ObjectFileJIT::SetLoadAddress (Target &target, 295 lldb::addr_t value, 296 bool value_is_offset) 297{ 298 size_t num_loaded_sections = 0; 299 SectionList *section_list = GetSectionList (); 300 if (section_list) 301 { 302 const size_t num_sections = section_list->GetSize(); 303 // "value" is an offset to apply to each top level segment 304 for (size_t sect_idx = 0; sect_idx < num_sections; ++sect_idx) 305 { 306 // Iterate through the object file sections to find all 307 // of the sections that size on disk (to avoid __PAGEZERO) 308 // and load them 309 SectionSP section_sp (section_list->GetSectionAtIndex (sect_idx)); 310 if (section_sp && 311 section_sp->GetFileSize() > 0 && 312 section_sp->IsThreadSpecific() == false) 313 { 314 if (target.GetSectionLoadList().SetSectionLoadAddress (section_sp, section_sp->GetFileAddress() + value)) 315 ++num_loaded_sections; 316 } 317 } 318 } 319 return num_loaded_sections > 0; 320} 321 322 323size_t 324ObjectFileJIT::ReadSectionData (const lldb_private::Section *section, 325 lldb::offset_t section_offset, 326 void *dst, 327 size_t dst_len) const 328{ 329 lldb::offset_t file_size = section->GetFileSize(); 330 if (section_offset < file_size) 331 { 332 size_t src_len = file_size - section_offset; 333 if (src_len > dst_len) 334 src_len = dst_len; 335 const uint8_t *src = ((uint8_t *)(uintptr_t)section->GetFileOffset()) + section_offset; 336 337 memcpy (dst, src, src_len); 338 return src_len; 339 } 340 return 0; 341} 342 343size_t 344ObjectFileJIT::ReadSectionData (const lldb_private::Section *section, 345 lldb_private::DataExtractor& section_data) const 346{ 347 if (section->GetFileSize()) 348 { 349 const void *src = (void *)(uintptr_t)section->GetFileOffset(); 350 351 DataBufferSP data_sp (new lldb_private::DataBufferHeap(src, section->GetFileSize())); 352 if (data_sp) 353 { 354 section_data.SetData (data_sp, 0, data_sp->GetByteSize()); 355 section_data.SetByteOrder (GetByteOrder()); 356 section_data.SetAddressByteSize (GetAddressByteSize()); 357 return section_data.GetByteSize(); 358 } 359 } 360 section_data.Clear(); 361 return 0; 362} 363 364