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llvm-project/lldb/source/Plugins/DynamicLoader/Darwin-Kernel/DynamicLoaderDarwinKernel.cpp

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//===-- DynamicLoaderDarwinKernel.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/DataBuffer.h"
#include "lldb/Core/DataBufferHeap.h"
#include "lldb/Core/Debugger.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/Section.h"
#include "lldb/Core/State.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Target/ObjCLanguageRuntime.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/Thread.h"
#include "lldb/Target/ThreadPlanRunToAddress.h"
#include "lldb/Target/StackFrame.h"
#include "DynamicLoaderDarwinKernel.h"
//#define ENABLE_DEBUG_PRINTF // COMMENT THIS LINE OUT PRIOR TO CHECKIN
#ifdef ENABLE_DEBUG_PRINTF
#include <stdio.h>
#define DEBUG_PRINTF(fmt, ...) printf(fmt, ## __VA_ARGS__)
#else
#define DEBUG_PRINTF(fmt, ...)
#endif
using namespace lldb;
using namespace lldb_private;
/// FIXME - The ObjC Runtime trampoline handler doesn't really belong here.
/// I am putting it here so I can invoke it in the Trampoline code here, but
/// it should be moved to the ObjC Runtime support when it is set up.
//----------------------------------------------------------------------
// 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.
//----------------------------------------------------------------------
DynamicLoader *
DynamicLoaderDarwinKernel::CreateInstance (Process* process, bool force)
{
bool create = force;
if (!create)
{
Module* exe_module = process->GetTarget().GetExecutableModulePointer();
if (exe_module)
{
ObjectFile *object_file = exe_module->GetObjectFile();
if (object_file)
{
create = (object_file->GetStrata() == ObjectFile::eStrataKernel);
}
}
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)
{
process->SetCanJIT(false);
return new DynamicLoaderDarwinKernel (process);
}
return NULL;
}
//----------------------------------------------------------------------
// Constructor
//----------------------------------------------------------------------
DynamicLoaderDarwinKernel::DynamicLoaderDarwinKernel (Process* process) :
DynamicLoader(process),
m_kernel(),
m_kext_summary_header_ptr_addr (),
m_kext_summary_header_addr (),
m_kext_summary_header (),
m_kext_summaries(),
m_mutex(Mutex::eMutexTypeRecursive),
m_break_id (LLDB_INVALID_BREAK_ID)
{
}
//----------------------------------------------------------------------
// Destructor
//----------------------------------------------------------------------
DynamicLoaderDarwinKernel::~DynamicLoaderDarwinKernel()
{
Clear(true);
}
void
DynamicLoaderDarwinKernel::UpdateIfNeeded()
{
LoadKernelModuleIfNeeded();
SetNotificationBreakpointIfNeeded ();
}
//------------------------------------------------------------------
/// Called after attaching a process.
///
/// Allow DynamicLoader plug-ins to execute some code after
/// attaching to a process.
//------------------------------------------------------------------
void
DynamicLoaderDarwinKernel::DidAttach ()
{
PrivateInitialize(m_process);
UpdateIfNeeded();
}
//------------------------------------------------------------------
/// Called after attaching a process.
///
/// Allow DynamicLoader plug-ins to execute some code after
/// attaching to a process.
//------------------------------------------------------------------
void
DynamicLoaderDarwinKernel::DidLaunch ()
{
PrivateInitialize(m_process);
UpdateIfNeeded();
}
//----------------------------------------------------------------------
// Clear out the state of this class.
//----------------------------------------------------------------------
void
DynamicLoaderDarwinKernel::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_kernel.Clear(false);
m_kext_summary_header_ptr_addr.Clear();
m_kext_summary_header_addr.Clear();
m_kext_summaries.clear();
m_break_id = LLDB_INVALID_BREAK_ID;
}
bool
DynamicLoaderDarwinKernel::OSKextLoadedKextSummary::LoadImageAtFileAddress (Process *process)
{
if (IsLoaded())
return true;
if (module_sp)
{
bool changed = false;
if (module_sp->SetLoadAddress (process->GetTarget(), 0, changed))
load_process_stop_id = process->GetStopID();
}
return false;
}
bool
DynamicLoaderDarwinKernel::OSKextLoadedKextSummary::LoadImageUsingMemoryModule (Process *process)
{
if (IsLoaded())
return true;
bool uuid_is_valid = uuid.IsValid();
Target &target = process->GetTarget();
ModuleSP memory_module_sp;
// Use the memory module as the module if we have one...
if (address != LLDB_INVALID_ADDRESS)
{
FileSpec file_spec;
if (module_sp)
file_spec = module_sp->GetFileSpec();
else
file_spec.SetFile (name, false);
memory_module_sp = process->ReadModuleFromMemory (file_spec, address, false, false);
if (memory_module_sp && !uuid_is_valid)
{
uuid = memory_module_sp->GetUUID();
uuid_is_valid = uuid.IsValid();
}
}
if (!module_sp)
{
if (uuid_is_valid)
{
ModuleList &target_images = target.GetImages();
module_sp = target_images.FindModule(uuid);
if (!module_sp)
{
ModuleSpec module_spec;
module_spec.GetUUID() = uuid;
module_sp = target.GetSharedModule (module_spec);
}
}
}
if (memory_module_sp)
{
// Someone already supplied a file, make sure it is the right one.
if (module_sp)
{
if (module_sp->GetUUID() == memory_module_sp->GetUUID())
{
ObjectFile *ondisk_object_file = module_sp->GetObjectFile();
ObjectFile *memory_object_file = memory_module_sp->GetObjectFile();
if (memory_object_file && ondisk_object_file)
{
SectionList *ondisk_section_list = ondisk_object_file->GetSectionList ();
SectionList *memory_section_list = memory_object_file->GetSectionList ();
if (memory_section_list && ondisk_section_list)
{
const uint32_t num_ondisk_sections = ondisk_section_list->GetSize();
// There may be CTF sections in the memory image so we can't
// always just compare the number of sections (which are actually
// segments in mach-o parlance)
uint32_t sect_idx = 0;
// We now iterate through all sections in the file module
// and look to see if the memory module has a load address
// for that section.
uint32_t num_sections_loaded = 0;
for (sect_idx=0; sect_idx<num_ondisk_sections; ++sect_idx)
{
SectionSP ondisk_section_sp(ondisk_section_list->GetSectionAtIndex(sect_idx));
if (ondisk_section_sp)
{
const Section *memory_section = memory_section_list->FindSectionByName(ondisk_section_sp->GetName()).get();
if (memory_section)
{
target.GetSectionLoadList().SetSectionLoadAddress (ondisk_section_sp, memory_section->GetFileAddress());
++num_sections_loaded;
}
}
}
if (num_sections_loaded > 0)
load_process_stop_id = process->GetStopID();
else
module_sp.reset(); // No sections were loaded
}
else
module_sp.reset(); // One or both section lists
}
else
module_sp.reset(); // One or both object files missing
}
else
module_sp.reset(); // UUID mismatch
}
// Use the memory module as the module if we didn't like the file
// module we either found or were supplied with
if (!module_sp)
{
module_sp = memory_module_sp;
// Load the memory image in the target as all adresses are already correct
bool changed = false;
target.GetImages().Append (memory_module_sp);
if (module_sp->SetLoadAddress (target, 0, changed))
load_process_stop_id = process->GetStopID();
}
}
bool is_loaded = IsLoaded();
if (so_address.IsValid())
{
if (is_loaded)
so_address.SetLoadAddress (address, &target);
else
target.GetImages().ResolveFileAddress (address, so_address);
}
return is_loaded;
}
uint32_t
DynamicLoaderDarwinKernel::OSKextLoadedKextSummary::GetAddressByteSize ()
{
if (module_sp)
return module_sp->GetArchitecture().GetAddressByteSize();
return 0;
}
lldb::ByteOrder
DynamicLoaderDarwinKernel::OSKextLoadedKextSummary::GetByteOrder()
{
if (module_sp)
return module_sp->GetArchitecture().GetByteOrder();
return lldb::endian::InlHostByteOrder();
}
lldb_private::ArchSpec
DynamicLoaderDarwinKernel::OSKextLoadedKextSummary::GetArchitecture () const
{
if (module_sp)
return module_sp->GetArchitecture();
return lldb_private::ArchSpec ();
}
//----------------------------------------------------------------------
// Load the kernel module and initialize the "m_kernel" member. Return
// true _only_ if the kernel is loaded the first time through (subsequent
// calls to this function should return false after the kernel has been
// already loaded).
//----------------------------------------------------------------------
void
DynamicLoaderDarwinKernel::LoadKernelModuleIfNeeded()
{
if (!m_kext_summary_header_ptr_addr.IsValid())
{
m_kernel.Clear(false);
m_kernel.module_sp = m_process->GetTarget().GetExecutableModule();
strncpy(m_kernel.name, "mach_kernel", sizeof(m_kernel.name));
if (m_kernel.address == LLDB_INVALID_ADDRESS)
{
m_kernel.address = m_process->GetImageInfoAddress ();
if (m_kernel.address == LLDB_INVALID_ADDRESS && m_kernel.module_sp)
{
// We didn't get a hint from the process, so we will
// try the kernel at the address that it exists at in
// the file if we have one
ObjectFile *kernel_object_file = m_kernel.module_sp->GetObjectFile();
if (kernel_object_file)
m_kernel.address = kernel_object_file->GetHeaderAddress().GetFileAddress();
}
}
if (m_kernel.address != LLDB_INVALID_ADDRESS)
{
if (!m_kernel.LoadImageUsingMemoryModule (m_process))
{
m_kernel.LoadImageAtFileAddress (m_process);
}
}
if (m_kernel.IsLoaded())
{
static ConstString kext_summary_symbol ("gLoadedKextSummaries");
const Symbol *symbol = m_kernel.module_sp->FindFirstSymbolWithNameAndType (kext_summary_symbol, eSymbolTypeData);
if (symbol)
{
m_kext_summary_header_ptr_addr = symbol->GetAddress();
// Update all image infos
ReadAllKextSummaries ();
}
}
else
{
m_kernel.Clear(false);
}
}
}
//----------------------------------------------------------------------
// Static callback function that gets called when our DYLD notification
// breakpoint gets hit. We update all of our image infos and then
// let our super class DynamicLoader class decide if we should stop
// or not (based on global preference).
//----------------------------------------------------------------------
bool
DynamicLoaderDarwinKernel::BreakpointHitCallback (void *baton,
StoppointCallbackContext *context,
user_id_t break_id,
user_id_t break_loc_id)
{
return static_cast<DynamicLoaderDarwinKernel*>(baton)->BreakpointHit (context, break_id, break_loc_id);
}
bool
DynamicLoaderDarwinKernel::BreakpointHit (StoppointCallbackContext *context,
user_id_t break_id,
user_id_t break_loc_id)
{
LogSP log(GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER));
if (log)
log->Printf ("DynamicLoaderDarwinKernel::BreakpointHit (...)\n");
ReadAllKextSummaries ();
if (log)
PutToLog(log.get());
return GetStopWhenImagesChange();
}
bool
DynamicLoaderDarwinKernel::ReadKextSummaryHeader ()
{
Mutex::Locker locker(m_mutex);
// the all image infos is already valid for this process stop ID
m_kext_summaries.clear();
if (m_kext_summary_header_ptr_addr.IsValid())
{
const uint32_t addr_size = m_kernel.GetAddressByteSize ();
const ByteOrder byte_order = m_kernel.GetByteOrder();
Error error;
// Read enough bytes for a "OSKextLoadedKextSummaryHeader" structure
// which is currenty 4 uint32_t and a pointer.
uint8_t buf[24];
DataExtractor data (buf, sizeof(buf), byte_order, addr_size);
const size_t count = 4 * sizeof(uint32_t) + addr_size;
const bool prefer_file_cache = false;
if (m_process->GetTarget().ReadPointerFromMemory (m_kext_summary_header_ptr_addr,
prefer_file_cache,
error,
m_kext_summary_header_addr))
{
// We got a valid address for our kext summary header and make sure it isn't NULL
if (m_kext_summary_header_addr.IsValid() &&
m_kext_summary_header_addr.GetFileAddress() != 0)
{
const size_t bytes_read = m_process->GetTarget().ReadMemory (m_kext_summary_header_addr, prefer_file_cache, buf, count, error);
if (bytes_read == count)
{
uint32_t offset = 0;
m_kext_summary_header.version = data.GetU32(&offset);
if (m_kext_summary_header.version >= 2)
{
m_kext_summary_header.entry_size = data.GetU32(&offset);
}
else
{
// Versions less than 2 didn't have an entry size, it was hard coded
m_kext_summary_header.entry_size = KERNEL_MODULE_ENTRY_SIZE_VERSION_1;
}
m_kext_summary_header.entry_count = data.GetU32(&offset);
return true;
}
}
}
}
m_kext_summary_header_addr.Clear();
return false;
}
bool
DynamicLoaderDarwinKernel::ParseKextSummaries (const Address &kext_summary_addr,
uint32_t count)
{
OSKextLoadedKextSummary::collection kext_summaries;
LogSP log(GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER));
if (log)
log->Printf ("Adding %d modules.\n", count);
Mutex::Locker locker(m_mutex);
if (!ReadKextSummaries (kext_summary_addr, count, kext_summaries))
return false;
Stream *s = &m_process->GetTarget().GetDebugger().GetOutputStream();
for (uint32_t i = 0; i < count; i++)
{
if (s)
{
const uint8_t *u = (const uint8_t *)kext_summaries[i].uuid.GetBytes();
if (u)
{
s->Printf("Loading kext: %2.2X%2.2X%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X%2.2X%2.2X%2.2X%2.2X 0x%16.16llx \"%s\"...",
u[ 0], u[ 1], u[ 2], u[ 3], u[ 4], u[ 5], u[ 6], u[ 7],
u[ 8], u[ 9], u[10], u[11], u[12], u[13], u[14], u[15],
kext_summaries[i].address, kext_summaries[i].name);
}
else
{
s->Printf("0x%16.16llx \"%s\"...", kext_summaries[i].address, kext_summaries[i].name);
}
}
if (!kext_summaries[i].LoadImageUsingMemoryModule (m_process))
kext_summaries[i].LoadImageAtFileAddress (m_process);
if (s)
{
if (kext_summaries[i].module_sp)
{
if (kext_summaries[i].module_sp->GetFileSpec().GetDirectory())
s->Printf("\n found kext: %s/%s\n",
kext_summaries[i].module_sp->GetFileSpec().GetDirectory().AsCString(),
kext_summaries[i].module_sp->GetFileSpec().GetFilename().AsCString());
else
s->Printf("\n found kext: %s\n",
kext_summaries[i].module_sp->GetFileSpec().GetFilename().AsCString());
}
else
s->Printf (" failed to locate/load.\n");
}
if (log)
kext_summaries[i].PutToLog (log.get());
}
bool return_value = AddModulesUsingImageInfos (kext_summaries);
return return_value;
}
// Adds the modules in image_infos to m_kext_summaries.
// NB don't call this passing in m_kext_summaries.
bool
DynamicLoaderDarwinKernel::AddModulesUsingImageInfos (OSKextLoadedKextSummary::collection &image_infos)
{
// Now add these images to the main list.
ModuleList loaded_module_list;
for (uint32_t idx = 0; idx < image_infos.size(); ++idx)
{
OSKextLoadedKextSummary &image_info = image_infos[idx];
m_kext_summaries.push_back(image_info);
if (image_info.module_sp && m_process->GetStopID() == image_info.load_process_stop_id)
loaded_module_list.AppendIfNeeded (image_infos[idx].module_sp);
}
if (loaded_module_list.GetSize() > 0)
{
m_process->GetTarget().ModulesDidLoad (loaded_module_list);
}
return true;
}
uint32_t
DynamicLoaderDarwinKernel::ReadKextSummaries (const Address &kext_summary_addr,
uint32_t image_infos_count,
OSKextLoadedKextSummary::collection &image_infos)
{
const ByteOrder endian = m_kernel.GetByteOrder();
const uint32_t addr_size = m_kernel.GetAddressByteSize();
image_infos.resize(image_infos_count);
const size_t count = image_infos.size() * m_kext_summary_header.entry_size;
DataBufferHeap data(count, 0);
Error error;
Stream *s = &m_process->GetTarget().GetDebugger().GetOutputStream();
if (s)
s->Printf ("Reading %u kext summaries...\n", image_infos_count);
const bool prefer_file_cache = false;
const size_t bytes_read = m_process->GetTarget().ReadMemory (kext_summary_addr,
prefer_file_cache,
data.GetBytes(),
data.GetByteSize(),
error);
if (bytes_read == count)
{
DataExtractor extractor (data.GetBytes(), data.GetByteSize(), endian, addr_size);
uint32_t i=0;
for (uint32_t kext_summary_offset = 0;
i < image_infos.size() && extractor.ValidOffsetForDataOfSize(kext_summary_offset, m_kext_summary_header.entry_size);
++i, kext_summary_offset += m_kext_summary_header.entry_size)
{
uint32_t offset = kext_summary_offset;
const void *name_data = extractor.GetData(&offset, KERNEL_MODULE_MAX_NAME);
if (name_data == NULL)
break;
memcpy (image_infos[i].name, name_data, KERNEL_MODULE_MAX_NAME);
image_infos[i].uuid.SetBytes(extractor.GetData (&offset, 16));
image_infos[i].address = extractor.GetU64(&offset);
if (!image_infos[i].so_address.SetLoadAddress (image_infos[i].address, &m_process->GetTarget()))
m_process->GetTarget().GetImages().ResolveFileAddress (image_infos[i].address, image_infos[i].so_address);
image_infos[i].size = extractor.GetU64(&offset);
image_infos[i].version = extractor.GetU64(&offset);
image_infos[i].load_tag = extractor.GetU32(&offset);
image_infos[i].flags = extractor.GetU32(&offset);
if ((offset - kext_summary_offset) < m_kext_summary_header.entry_size)
{
image_infos[i].reference_list = extractor.GetU64(&offset);
}
else
{
image_infos[i].reference_list = 0;
}
// printf ("[%3u] %*.*s: address=0x%16.16llx, size=0x%16.16llx, version=0x%16.16llx, load_tag=0x%8.8x, flags=0x%8.8x\n",
// i,
// KERNEL_MODULE_MAX_NAME, KERNEL_MODULE_MAX_NAME, (char *)name_data,
// image_infos[i].address,
// image_infos[i].size,
// image_infos[i].version,
// image_infos[i].load_tag,
// image_infos[i].flags);
}
if (i < image_infos.size())
image_infos.resize(i);
}
else
{
image_infos.clear();
}
return image_infos.size();
}
bool
DynamicLoaderDarwinKernel::ReadAllKextSummaries ()
{
LogSP log(GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER));
Mutex::Locker locker(m_mutex);
if (ReadKextSummaryHeader ())
{
if (m_kext_summary_header.entry_count > 0 && m_kext_summary_header_addr.IsValid())
{
Address summary_addr (m_kext_summary_header_addr);
summary_addr.Slide(m_kext_summary_header.GetSize());
if (!ParseKextSummaries (summary_addr, m_kext_summary_header.entry_count))
{
m_kext_summaries.clear();
}
return true;
}
}
return false;
}
//----------------------------------------------------------------------
// Dump an image info structure to the file handle provided.
//----------------------------------------------------------------------
void
DynamicLoaderDarwinKernel::OSKextLoadedKextSummary::PutToLog (Log *log) const
{
if (log == NULL)
return;
const uint8_t *u = (uint8_t *)uuid.GetBytes();
if (address == LLDB_INVALID_ADDRESS)
{
if (u)
{
log->Printf("\tuuid=%2.2X%2.2X%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X%2.2X%2.2X%2.2X%2.2X name=\"%s\" (UNLOADED)",
u[ 0], u[ 1], u[ 2], u[ 3],
u[ 4], u[ 5], u[ 6], u[ 7],
u[ 8], u[ 9], u[10], u[11],
u[12], u[13], u[14], u[15],
name);
}
else
log->Printf("\tname=\"%s\" (UNLOADED)", name);
}
else
{
if (u)
{
log->Printf("\taddr=0x%16.16llx size=0x%16.16llx version=0x%16.16llx load-tag=0x%8.8x flags=0x%8.8x ref-list=0x%16.16llx uuid=%2.2X%2.2X%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X%2.2X%2.2X%2.2X%2.2X name=\"%s\"",
address, size, version, load_tag, flags, reference_list,
u[ 0], u[ 1], u[ 2], u[ 3], u[ 4], u[ 5], u[ 6], u[ 7],
u[ 8], u[ 9], u[10], u[11], u[12], u[13], u[14], u[15],
name);
}
else
{
log->Printf("\t[0x%16.16llx - 0x%16.16llx) version=0x%16.16llx load-tag=0x%8.8x flags=0x%8.8x ref-list=0x%16.16llx name=\"%s\"",
address, address+size, version, load_tag, flags, reference_list,
name);
}
}
}
//----------------------------------------------------------------------
// Dump the _dyld_all_image_infos members and all current image infos
// that we have parsed to the file handle provided.
//----------------------------------------------------------------------
void
DynamicLoaderDarwinKernel::PutToLog(Log *log) const
{
if (log == NULL)
return;
Mutex::Locker locker(m_mutex);
log->Printf("gLoadedKextSummaries = 0x%16.16llx { version=%u, entry_size=%u, entry_count=%u }",
m_kext_summary_header_addr.GetFileAddress(),
m_kext_summary_header.version,
m_kext_summary_header.entry_size,
m_kext_summary_header.entry_count);
size_t i;
const size_t count = m_kext_summaries.size();
if (count > 0)
{
log->PutCString("Loaded:");
for (i = 0; i<count; i++)
m_kext_summaries[i].PutToLog(log);
}
}
void
DynamicLoaderDarwinKernel::PrivateInitialize(Process *process)
{
DEBUG_PRINTF("DynamicLoaderDarwinKernel::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState()));
Clear(true);
m_process = process;
m_process->GetTarget().GetSectionLoadList().Clear();
}
void
DynamicLoaderDarwinKernel::SetNotificationBreakpointIfNeeded ()
{
if (m_break_id == LLDB_INVALID_BREAK_ID && m_kernel.module_sp)
{
DEBUG_PRINTF("DynamicLoaderDarwinKernel::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState()));
const bool internal_bp = true;
const LazyBool skip_prologue = eLazyBoolNo;
FileSpecList module_spec_list;
module_spec_list.Append (m_kernel.module_sp->GetFileSpec());
Breakpoint *bp = m_process->GetTarget().CreateBreakpoint (&module_spec_list,
NULL,
"OSKextLoadedKextSummariesUpdated",
eFunctionNameTypeFull,
skip_prologue,
internal_bp).get();
bp->SetCallback (DynamicLoaderDarwinKernel::BreakpointHitCallback, this, true);
m_break_id = bp->GetID();
}
}
//----------------------------------------------------------------------
// Member function that gets called when the process state changes.
//----------------------------------------------------------------------
void
DynamicLoaderDarwinKernel::PrivateProcessStateChanged (Process *process, StateType state)
{
DEBUG_PRINTF("DynamicLoaderDarwinKernel::%s(%s)\n", __FUNCTION__, StateAsCString(state));
switch (state)
{
case eStateConnected:
case eStateAttaching:
case eStateLaunching:
case eStateInvalid:
case eStateUnloaded:
case eStateExited:
case eStateDetached:
Clear(false);
break;
case eStateStopped:
UpdateIfNeeded();
break;
case eStateRunning:
case eStateStepping:
case eStateCrashed:
case eStateSuspended:
break;
default:
break;
}
}
ThreadPlanSP
DynamicLoaderDarwinKernel::GetStepThroughTrampolinePlan (Thread &thread, bool stop_others)
{
ThreadPlanSP thread_plan_sp;
LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP));
if (log)
log->Printf ("Could not find symbol for step through.");
return thread_plan_sp;
}
Error
DynamicLoaderDarwinKernel::CanLoadImage ()
{
Error error;
error.SetErrorString("always unsafe to load or unload shared libraries in the darwin kernel");
return error;
}
void
DynamicLoaderDarwinKernel::Initialize()
{
PluginManager::RegisterPlugin (GetPluginNameStatic(),
GetPluginDescriptionStatic(),
CreateInstance);
}
void
DynamicLoaderDarwinKernel::Terminate()
{
PluginManager::UnregisterPlugin (CreateInstance);
}
const char *
DynamicLoaderDarwinKernel::GetPluginNameStatic()
{
return "dynamic-loader.macosx-kernel";
}
const char *
DynamicLoaderDarwinKernel::GetPluginDescriptionStatic()
{
return "Dynamic loader plug-in that watches for shared library loads/unloads in the MacOSX kernel.";
}
//------------------------------------------------------------------
// PluginInterface protocol
//------------------------------------------------------------------
const char *
DynamicLoaderDarwinKernel::GetPluginName()
{
return "DynamicLoaderDarwinKernel";
}
const char *
DynamicLoaderDarwinKernel::GetShortPluginName()
{
return GetPluginNameStatic();
}
uint32_t
DynamicLoaderDarwinKernel::GetPluginVersion()
{
return 1;
}
lldb::ByteOrder
DynamicLoaderDarwinKernel::GetByteOrderFromMagic (uint32_t magic)
{
switch (magic)
{
case llvm::MachO::HeaderMagic32:
case llvm::MachO::HeaderMagic64:
return lldb::endian::InlHostByteOrder();
case llvm::MachO::HeaderMagic32Swapped:
case llvm::MachO::HeaderMagic64Swapped:
if (lldb::endian::InlHostByteOrder() == lldb::eByteOrderBig)
return lldb::eByteOrderLittle;
else
return lldb::eByteOrderBig;
default:
break;
}
return lldb::eByteOrderInvalid;
}
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