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-rw-r--r--source/Plugins/ObjectFile/JIT/ObjectFileJIT.cpp363
1 files changed, 363 insertions, 0 deletions
diff --git a/source/Plugins/ObjectFile/JIT/ObjectFileJIT.cpp b/source/Plugins/ObjectFile/JIT/ObjectFileJIT.cpp
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+++ b/source/Plugins/ObjectFile/JIT/ObjectFileJIT.cpp
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+//===-- ObjectFileJIT.cpp ---------------------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/StringRef.h"
+
+#include "ObjectFileJIT.h"
+
+#include "lldb/lldb-private-log.h"
+#include "lldb/Core/ArchSpec.h"
+#include "lldb/Core/DataBuffer.h"
+#include "lldb/Core/DataBufferHeap.h"
+#include "lldb/Core/Debugger.h"
+#include "lldb/Core/FileSpecList.h"
+#include "lldb/Core/Log.h"
+#include "lldb/Core/Module.h"
+#include "lldb/Core/ModuleSpec.h"
+#include "lldb/Core/PluginManager.h"
+#include "lldb/Core/RangeMap.h"
+#include "lldb/Core/Section.h"
+#include "lldb/Core/StreamFile.h"
+#include "lldb/Core/StreamString.h"
+#include "lldb/Core/Timer.h"
+#include "lldb/Core/UUID.h"
+#include "lldb/Host/Host.h"
+#include "lldb/Host/FileSpec.h"
+#include "lldb/Symbol/ObjectFile.h"
+#include "lldb/Target/Platform.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Target/SectionLoadList.h"
+#include "lldb/Target/Target.h"
+
+#ifndef __APPLE__
+#include "Utility/UuidCompatibility.h"
+#endif
+
+using namespace lldb;
+using namespace lldb_private;
+
+
+void
+ObjectFileJIT::Initialize()
+{
+ PluginManager::RegisterPlugin (GetPluginNameStatic(),
+ GetPluginDescriptionStatic(),
+ CreateInstance,
+ CreateMemoryInstance,
+ GetModuleSpecifications);
+}
+
+void
+ObjectFileJIT::Terminate()
+{
+ PluginManager::UnregisterPlugin (CreateInstance);
+}
+
+
+lldb_private::ConstString
+ObjectFileJIT::GetPluginNameStatic()
+{
+ static ConstString g_name("jit");
+ return g_name;
+}
+
+const char *
+ObjectFileJIT::GetPluginDescriptionStatic()
+{
+ return "JIT code object file";
+}
+
+ObjectFile *
+ObjectFileJIT::CreateInstance (const lldb::ModuleSP &module_sp,
+ DataBufferSP& data_sp,
+ lldb::offset_t data_offset,
+ const FileSpec* file,
+ lldb::offset_t file_offset,
+ lldb::offset_t length)
+{
+ // JIT'ed object file is backed by the ObjectFileJITDelegate, never
+ // read from a file
+ return NULL;
+}
+
+ObjectFile *
+ObjectFileJIT::CreateMemoryInstance (const lldb::ModuleSP &module_sp,
+ DataBufferSP& data_sp,
+ const ProcessSP &process_sp,
+ lldb::addr_t header_addr)
+{
+ // JIT'ed object file is backed by the ObjectFileJITDelegate, never
+ // read from memory
+ return NULL;
+}
+
+size_t
+ObjectFileJIT::GetModuleSpecifications (const lldb_private::FileSpec& file,
+ lldb::DataBufferSP& data_sp,
+ lldb::offset_t data_offset,
+ lldb::offset_t file_offset,
+ lldb::offset_t length,
+ lldb_private::ModuleSpecList &specs)
+{
+ // JIT'ed object file can't be read from a file on disk
+ return 0;
+}
+
+ObjectFileJIT::ObjectFileJIT (const lldb::ModuleSP &module_sp,
+ const ObjectFileJITDelegateSP &delegate_sp) :
+ ObjectFile(module_sp, NULL, 0, 0, DataBufferSP(), 0),
+ m_delegate_wp ()
+{
+ if (delegate_sp)
+ {
+ m_delegate_wp = delegate_sp;
+ m_data.SetByteOrder(delegate_sp->GetByteOrder());
+ m_data.SetAddressByteSize(delegate_sp->GetAddressByteSize());
+ }
+}
+
+ObjectFileJIT::~ObjectFileJIT()
+{
+}
+
+
+bool
+ObjectFileJIT::ParseHeader ()
+{
+ // JIT code is never in a file, nor is it required to have any header
+ return false;
+}
+
+ByteOrder
+ObjectFileJIT::GetByteOrder () const
+{
+ return m_data.GetByteOrder();
+}
+
+bool
+ObjectFileJIT::IsExecutable() const
+{
+ return false;
+}
+
+uint32_t
+ObjectFileJIT::GetAddressByteSize () const
+{
+ return m_data.GetAddressByteSize();
+}
+
+
+Symtab *
+ObjectFileJIT::GetSymtab()
+{
+ ModuleSP module_sp(GetModule());
+ if (module_sp)
+ {
+ lldb_private::Mutex::Locker locker(module_sp->GetMutex());
+ if (m_symtab_ap.get() == NULL)
+ {
+ m_symtab_ap.reset(new Symtab(this));
+ Mutex::Locker symtab_locker (m_symtab_ap->GetMutex());
+ ObjectFileJITDelegateSP delegate_sp (m_delegate_wp.lock());
+ if (delegate_sp)
+ delegate_sp->PopulateSymtab(this, *m_symtab_ap);
+ // TODO: get symbols from delegate
+ m_symtab_ap->Finalize ();
+ }
+ }
+ return m_symtab_ap.get();
+}
+
+bool
+ObjectFileJIT::IsStripped ()
+{
+ return false; // JIT code that is in a module is never stripped
+}
+
+void
+ObjectFileJIT::CreateSections (SectionList &unified_section_list)
+{
+ if (!m_sections_ap.get())
+ {
+ m_sections_ap.reset(new SectionList());
+ ObjectFileJITDelegateSP delegate_sp (m_delegate_wp.lock());
+ if (delegate_sp)
+ {
+ delegate_sp->PopulateSectionList(this, *m_sections_ap);
+ unified_section_list = *m_sections_ap;
+ }
+ }
+}
+
+void
+ObjectFileJIT::Dump (Stream *s)
+{
+ ModuleSP module_sp(GetModule());
+ if (module_sp)
+ {
+ lldb_private::Mutex::Locker locker(module_sp->GetMutex());
+ s->Printf("%p: ", static_cast<void*>(this));
+ s->Indent();
+ s->PutCString("ObjectFileJIT");
+
+ ArchSpec arch;
+ if (GetArchitecture(arch))
+ *s << ", arch = " << arch.GetArchitectureName();
+
+ s->EOL();
+
+ SectionList *sections = GetSectionList();
+ if (sections)
+ sections->Dump(s, NULL, true, UINT32_MAX);
+
+ if (m_symtab_ap.get())
+ m_symtab_ap->Dump(s, NULL, eSortOrderNone);
+ }
+}
+
+bool
+ObjectFileJIT::GetUUID (lldb_private::UUID* uuid)
+{
+ // TODO: maybe get from delegate, not needed for first pass
+ return false;
+}
+
+
+uint32_t
+ObjectFileJIT::GetDependentModules (FileSpecList& files)
+{
+ // JIT modules don't have dependencies, but they could
+ // if external functions are called and we know where they are
+ files.Clear();
+ return 0;
+}
+
+lldb_private::Address
+ObjectFileJIT::GetEntryPointAddress ()
+{
+ return Address();
+}
+
+lldb_private::Address
+ObjectFileJIT::GetHeaderAddress ()
+{
+ return Address();
+}
+
+
+
+ObjectFile::Type
+ObjectFileJIT::CalculateType()
+{
+ return eTypeJIT;
+}
+
+ObjectFile::Strata
+ObjectFileJIT::CalculateStrata()
+{
+ return eStrataJIT;
+}
+
+
+bool
+ObjectFileJIT::GetArchitecture (ArchSpec &arch)
+{
+ ObjectFileJITDelegateSP delegate_sp (m_delegate_wp.lock());
+ if (delegate_sp)
+ return delegate_sp->GetArchitecture(arch);
+ return false;
+}
+
+//------------------------------------------------------------------
+// PluginInterface protocol
+//------------------------------------------------------------------
+lldb_private::ConstString
+ObjectFileJIT::GetPluginName()
+{
+ return GetPluginNameStatic();
+}
+
+uint32_t
+ObjectFileJIT::GetPluginVersion()
+{
+ return 1;
+}
+
+
+bool
+ObjectFileJIT::SetLoadAddress (Target &target,
+ lldb::addr_t value,
+ bool value_is_offset)
+{
+ size_t num_loaded_sections = 0;
+ SectionList *section_list = GetSectionList ();
+ if (section_list)
+ {
+ const size_t num_sections = section_list->GetSize();
+ // "value" is an offset to apply to each top level segment
+ for (size_t sect_idx = 0; sect_idx < num_sections; ++sect_idx)
+ {
+ // Iterate through the object file sections to find all
+ // of the sections that size on disk (to avoid __PAGEZERO)
+ // and load them
+ SectionSP section_sp (section_list->GetSectionAtIndex (sect_idx));
+ if (section_sp &&
+ section_sp->GetFileSize() > 0 &&
+ section_sp->IsThreadSpecific() == false)
+ {
+ if (target.GetSectionLoadList().SetSectionLoadAddress (section_sp, section_sp->GetFileAddress() + value))
+ ++num_loaded_sections;
+ }
+ }
+ }
+ return num_loaded_sections > 0;
+}
+
+
+size_t
+ObjectFileJIT::ReadSectionData (const lldb_private::Section *section,
+ lldb::offset_t section_offset,
+ void *dst,
+ size_t dst_len) const
+{
+ lldb::offset_t file_size = section->GetFileSize();
+ if (section_offset < file_size)
+ {
+ size_t src_len = file_size - section_offset;
+ if (src_len > dst_len)
+ src_len = dst_len;
+ const uint8_t *src = ((uint8_t *)(uintptr_t)section->GetFileOffset()) + section_offset;
+
+ memcpy (dst, src, src_len);
+ return src_len;
+ }
+ return 0;
+}
+
+size_t
+ObjectFileJIT::ReadSectionData (const lldb_private::Section *section,
+ lldb_private::DataExtractor& section_data) const
+{
+ if (section->GetFileSize())
+ {
+ const void *src = (void *)(uintptr_t)section->GetFileOffset();
+
+ DataBufferSP data_sp (new lldb_private::DataBufferHeap(src, section->GetFileSize()));
+ if (data_sp)
+ {
+ section_data.SetData (data_sp, 0, data_sp->GetByteSize());
+ section_data.SetByteOrder (GetByteOrder());
+ section_data.SetAddressByteSize (GetAddressByteSize());
+ return section_data.GetByteSize();
+ }
+ }
+ section_data.Clear();
+ return 0;
+}
+