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a7b5afa91bb9077cc58c2ecdce7fe7943bb2e9bb
clang-p2996/lldb/source/Plugins/SystemRuntime/MacOSX/SystemRuntimeMacOSX.cpp
Jason Molenda a7b5afa91b Commit a work-in-progress system runtime for Mac OS X which won't 
do anything right now.  Add a few new methods to the Thread base
class which HistoryThread needs.  I think I updated all the 
CMakeLists files correctly for the new plugin.

llvm-svn: 194756
2013-11-15 00:17:32 +00:00

423 lines
14 KiB
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//===-- SystemRuntimeMacOSX.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/Breakpoint/StoppointCallbackContext.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/DataExtractor.h"
#include "lldb/Core/DataBufferHeap.h"
#include "lldb/Core/Section.h"
#include "lldb/Expression/ClangFunction.h"
#include "lldb/Expression/ClangUtilityFunction.h"
#include "lldb/Host/FileSpec.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/SymbolContext.h"
#include "Plugins/Process/Utility/HistoryThread.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/Thread.h"
#include "SystemRuntimeMacOSX.h"
using namespace lldb;
using namespace lldb_private;
//----------------------------------------------------------------------
// Create an instance of this class. This function is filled into
// the plugin info class that gets handed out by the plugin factory and
// allows the lldb to instantiate an instance of this class.
//----------------------------------------------------------------------
SystemRuntime *
SystemRuntimeMacOSX::CreateInstance (Process* process)
{
bool create = false;
if (!create)
{
create = true;
Module* exe_module = process->GetTarget().GetExecutableModulePointer();
if (exe_module)
{
ObjectFile *object_file = exe_module->GetObjectFile();
if (object_file)
{
create = (object_file->GetStrata() == ObjectFile::eStrataUser);
}
}
if (create)
{
const llvm::Triple &triple_ref = process->GetTarget().GetArchitecture().GetTriple();
switch (triple_ref.getOS())
{
case llvm::Triple::Darwin:
case llvm::Triple::MacOSX:
case llvm::Triple::IOS:
create = triple_ref.getVendor() == llvm::Triple::Apple;
break;
default:
create = false;
break;
}
}
}
if (create)
return new SystemRuntimeMacOSX (process);
return NULL;
}
//----------------------------------------------------------------------
// Constructor
//----------------------------------------------------------------------
SystemRuntimeMacOSX::SystemRuntimeMacOSX (Process* process) :
SystemRuntime(process),
m_break_id(LLDB_INVALID_BREAK_ID),
m_mutex(Mutex::eMutexTypeRecursive)
{
m_ldi_header.initialized = 0;
}
//----------------------------------------------------------------------
// Destructor
//----------------------------------------------------------------------
SystemRuntimeMacOSX::~SystemRuntimeMacOSX()
{
Clear (true);
}
//----------------------------------------------------------------------
// Clear out the state of this class.
//----------------------------------------------------------------------
void
SystemRuntimeMacOSX::Clear (bool clear_process)
{
Mutex::Locker locker(m_mutex);
if (m_process->IsAlive() && LLDB_BREAK_ID_IS_VALID(m_break_id))
m_process->ClearBreakpointSiteByID(m_break_id);
if (clear_process)
m_process = NULL;
m_break_id = LLDB_INVALID_BREAK_ID;
m_ldi_header.initialized = 0;
}
void
SystemRuntimeMacOSX::DidAttach ()
{
}
void
SystemRuntimeMacOSX::DidLaunch ()
{
}
void
SystemRuntimeMacOSX::ModulesDidLoad (ModuleList &module_list)
{
}
bool
SystemRuntimeMacOSX::LdiHeadersInitialized ()
{
ParseLdiHeaders();
return m_ldi_header.initialized;
}
void
SystemRuntimeMacOSX::ParseLdiHeaders ()
{
if (m_ldi_header.initialized)
return;
static ConstString ldi_header_symbol ("ldi_infos");
SymbolContextList sc_list;
if (m_process->GetTarget().GetImages().FindSymbolsWithNameAndType (ldi_header_symbol, eSymbolTypeData, sc_list) > 0)
{
SymbolContext sc;
sc_list.GetContextAtIndex (0, sc);
AddressRange addr_range;
sc.GetAddressRange (eSymbolContextSymbol, 0, false, addr_range);
Error error;
Address ldi_header_addr = addr_range.GetBaseAddress();
uint8_t version_buf[6]; // version, ldi_header_size, initialized fields
DataExtractor data (version_buf, sizeof(version_buf), m_process->GetByteOrder(), m_process->GetAddressByteSize());
const size_t count = sizeof (version_buf);
const bool prefer_file_cache = false;
if (m_process->GetTarget().ReadMemory (ldi_header_addr, prefer_file_cache, version_buf, count, error) == sizeof (version_buf))
{
int version, initialized, ldi_header_size;
offset_t offset = 0;
version = data.GetU16(&offset);
ldi_header_size = data.GetU16(&offset);
initialized = data.GetU16(&offset);
if (initialized)
{
DataBufferHeap ldi_header (ldi_header_size, 0);
DataExtractor ldi_extractor (ldi_header.GetBytes(), ldi_header.GetByteSize(), m_process->GetByteOrder(), m_process->GetAddressByteSize());
if (m_process->GetTarget().ReadMemory (ldi_header_addr, prefer_file_cache, ldi_header.GetBytes(), ldi_header.GetByteSize(), error) == ldi_header.GetByteSize())
{
offset = 0;
m_ldi_header.version = ldi_extractor.GetU16(&offset);
m_ldi_header.ldi_header_size = ldi_extractor.GetU16(&offset);
m_ldi_header.initialized = ldi_extractor.GetU16(&offset);
m_ldi_header.queue_size = ldi_extractor.GetU16(&offset);
m_ldi_header.item_size = ldi_extractor.GetU16(&offset);
// 6 bytes of padding here
offset += 6;
m_ldi_header.queues_head_ptr_address = ldi_extractor.GetU64(&offset);
m_ldi_header.items_head_ptr_address = ldi_extractor.GetU64(&offset);
m_ldi_header.queue_offsets.next = ldi_extractor.GetU16(&offset);
m_ldi_header.queue_offsets.prev = ldi_extractor.GetU16(&offset);
m_ldi_header.queue_offsets.queue_id = ldi_extractor.GetU16(&offset);
m_ldi_header.queue_offsets.current_item_ptr = ldi_extractor.GetU16(&offset);
m_ldi_header.item_offsets.next = ldi_extractor.GetU16(&offset);
m_ldi_header.item_offsets.prev = ldi_extractor.GetU16(&offset);
m_ldi_header.item_offsets.type = ldi_extractor.GetU16(&offset);
m_ldi_header.item_offsets.identifier = ldi_extractor.GetU16(&offset);
m_ldi_header.item_offsets.stop_id = ldi_extractor.GetU16(&offset);
m_ldi_header.item_offsets.backtrace_length = ldi_extractor.GetU16(&offset);
m_ldi_header.item_offsets.backtrace_ptr = ldi_extractor.GetU16(&offset);
m_ldi_header.item_offsets.thread_name_ptr = ldi_extractor.GetU16(&offset);
m_ldi_header.item_offsets.queue_name_ptr = ldi_extractor.GetU16(&offset);
m_ldi_header.item_offsets.unique_thread_id = ldi_extractor.GetU16(&offset);
m_ldi_header.item_offsets.pthread_id = ldi_extractor.GetU16(&offset);
m_ldi_header.item_offsets.enqueueing_thread_dispatch_queue_t = ldi_extractor.GetU16(&offset);
m_ldi_header.item_offsets.enqueueing_thread_dispatch_block_ptr = ldi_extractor.GetU16(&offset);
}
}
}
}
}
lldb::addr_t
SystemRuntimeMacOSX::GetQueuesHead ()
{
if (!LdiHeadersInitialized())
return LLDB_INVALID_ADDRESS;
Error error;
addr_t queues_head = m_process->ReadPointerFromMemory (m_ldi_header.queues_head_ptr_address, error);
if (error.Success() == false || queues_head == LLDB_INVALID_ADDRESS || queues_head == 0)
return LLDB_INVALID_ADDRESS;
return queues_head;
}
lldb::addr_t
SystemRuntimeMacOSX::GetItemsHead ()
{
if (!LdiHeadersInitialized())
return LLDB_INVALID_ADDRESS;
Error error;
addr_t items_head = m_process->ReadPointerFromMemory (m_ldi_header.items_head_ptr_address, error);
if (error.Success() == false || items_head == LLDB_INVALID_ADDRESS || items_head == 0)
return LLDB_INVALID_ADDRESS;
return items_head;
}
addr_t
SystemRuntimeMacOSX::GetThreadCreatorItem (ThreadSP thread_sp)
{
addr_t enqueued_item_ptr = thread_sp->GetExtendedBacktraceToken();
if (enqueued_item_ptr == LLDB_INVALID_ADDRESS)
{
if (thread_sp->GetQueueID() == LLDB_INVALID_QUEUE_ID || thread_sp->GetQueueID() == 0)
return LLDB_INVALID_ADDRESS;
Error error;
uint64_t this_thread_queue_id = thread_sp->GetQueueID();
addr_t queues_head = GetQueuesHead();
if (queues_head == LLDB_INVALID_ADDRESS)
return LLDB_INVALID_ADDRESS;
// Step through the queues_head linked list looking for a queue matching this thread, if any
uint64_t queue_obj_ptr = queues_head;
enqueued_item_ptr = LLDB_INVALID_ADDRESS;
while (queue_obj_ptr != 0)
{
uint64_t queue_id = m_process->ReadUnsignedIntegerFromMemory (queue_obj_ptr + m_ldi_header.queue_offsets.queue_id, 8, LLDB_INVALID_ADDRESS, error);
if (error.Success() && queue_id != LLDB_INVALID_ADDRESS)
{
if (queue_id == this_thread_queue_id)
{
enqueued_item_ptr = m_process->ReadPointerFromMemory (queue_obj_ptr + m_ldi_header.queue_offsets.current_item_ptr, error);
break;
}
}
queue_obj_ptr = m_process->ReadPointerFromMemory (queue_obj_ptr + m_ldi_header.queue_offsets.next, error);
if (error.Success() == false || queue_obj_ptr == LLDB_INVALID_ADDRESS)
{
break;
}
}
}
return enqueued_item_ptr;
}
SystemRuntimeMacOSX::ArchivedBacktrace
SystemRuntimeMacOSX::GetLibdispatchExtendedBacktrace (ThreadSP thread_sp)
{
ArchivedBacktrace bt;
bt.stop_id = 0;
bt.stop_id_is_valid = false;
bt.libdispatch_queue_id = LLDB_INVALID_QUEUE_ID;
addr_t enqueued_item_ptr = GetThreadCreatorItem (thread_sp);
if (enqueued_item_ptr == LLDB_INVALID_ADDRESS)
return bt;
Error error;
uint32_t ptr_size = m_process->GetTarget().GetArchitecture().GetAddressByteSize();
uint32_t backtrace_length = m_process->ReadUnsignedIntegerFromMemory (enqueued_item_ptr + m_ldi_header.item_offsets.backtrace_length, 4, 0, error);
addr_t pc_array_address = m_process->ReadPointerFromMemory (enqueued_item_ptr + m_ldi_header.item_offsets.backtrace_ptr, error);
if (backtrace_length == 0 || pc_array_address == LLDB_INVALID_ADDRESS)
return bt;
for (uint32_t idx = 0; idx < backtrace_length; idx++)
{
addr_t pc_val = m_process->ReadPointerFromMemory (pc_array_address + (ptr_size * idx), error);
if (error.Success() && pc_val != LLDB_INVALID_ADDRESS)
{
bt.pcs.push_back (pc_val);
}
}
return bt;
}
const std::vector<ConstString> &
SystemRuntimeMacOSX::GetExtendedBacktraceTypes ()
{
if (m_types.size () == 0)
{
m_types.push_back(ConstString("libdispatch"));
m_types.push_back(ConstString("pthread"));
}
return m_types;
}
void
SystemRuntimeMacOSX::SetNewThreadQueueName (ThreadSP original_thread_sp, ThreadSP new_extended_thread_sp)
{
addr_t enqueued_item_ptr = GetThreadCreatorItem (original_thread_sp);
if (enqueued_item_ptr != LLDB_INVALID_ADDRESS)
{
Error error;
addr_t queue_name_ptr = m_process->ReadPointerFromMemory (enqueued_item_ptr + m_ldi_header.item_offsets.queue_name_ptr, error);
if (queue_name_ptr != LLDB_INVALID_ADDRESS && error.Success())
{
char namebuf[256];
if (m_process->ReadCStringFromMemory (queue_name_ptr, namebuf, sizeof (namebuf), error) > 0 && error.Success())
{
new_extended_thread_sp->SetQueueName (namebuf);
}
}
}
}
void
SystemRuntimeMacOSX::SetNewThreadExtendedBacktraceToken (ThreadSP original_thread_sp, ThreadSP new_extended_thread_sp)
{
addr_t enqueued_item_ptr = GetThreadCreatorItem (original_thread_sp);
if (enqueued_item_ptr != LLDB_INVALID_ADDRESS)
{
Error error;
uint64_t further_extended_backtrace = m_process->ReadPointerFromMemory (enqueued_item_ptr + m_ldi_header.item_offsets.enqueueing_thread_dispatch_block_ptr, error);
if (error.Success() && further_extended_backtrace != 0 && further_extended_backtrace != LLDB_INVALID_ADDRESS)
{
new_extended_thread_sp->SetExtendedBacktraceToken (further_extended_backtrace);
}
}
}
ThreadSP
SystemRuntimeMacOSX::GetExtendedBacktraceThread (ThreadSP original_thread_sp, ConstString type)
{
ThreadSP new_extended_thread_sp;
if (type != ConstString("libdispatch"))
return new_extended_thread_sp;
ArchivedBacktrace bt = GetLibdispatchExtendedBacktrace (original_thread_sp);
if (bt.pcs.size() == 0)
return new_extended_thread_sp;
new_extended_thread_sp.reset (new HistoryThread (*m_process, bt.pcs, bt.stop_id, bt.stop_id_is_valid));
SetNewThreadQueueName(original_thread_sp, new_extended_thread_sp);
SetNewThreadExtendedBacktraceToken(original_thread_sp, new_extended_thread_sp);
return new_extended_thread_sp;
}
void
SystemRuntimeMacOSX::Initialize()
{
PluginManager::RegisterPlugin (GetPluginNameStatic(),
GetPluginDescriptionStatic(),
CreateInstance);
}
void
SystemRuntimeMacOSX::Terminate()
{
PluginManager::UnregisterPlugin (CreateInstance);
}
lldb_private::ConstString
SystemRuntimeMacOSX::GetPluginNameStatic()
{
static ConstString g_name("systemruntime-macosx");
return g_name;
}
const char *
SystemRuntimeMacOSX::GetPluginDescriptionStatic()
{
return "System runtime plugin for Mac OS X native libraries.";
}
//------------------------------------------------------------------
// PluginInterface protocol
//------------------------------------------------------------------
lldb_private::ConstString
SystemRuntimeMacOSX::GetPluginName()
{
return GetPluginNameStatic();
}
uint32_t
SystemRuntimeMacOSX::GetPluginVersion()
{
return 1;
}
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