Change the DarwinKernel DyanmicLoader to maintain a persist list

of kernel extensions (kexts) that have been loaded into the kernel.
Now when we hit the "kexts have changed" breakpoint we can avoid
adding kexts multiple times, and can properly detect kext unloads
and remove them from the Target's list of modules.

<rdar://problem/13107639>
<rdar://problem/13191016>

llvm-svn: 175489
This commit is contained in:
Jason Molenda 2013-02-19 05:42:46 +00:00
parent b35030b229
commit 306bd0aa74
2 changed files with 601 additions and 288 deletions

View File

@ -447,7 +447,7 @@ DynamicLoaderDarwinKernel::DynamicLoaderDarwinKernel (Process* process, lldb::ad
m_kext_summary_header_ptr_addr (),
m_kext_summary_header_addr (),
m_kext_summary_header (),
m_kext_summaries(),
m_known_kexts (),
m_mutex(Mutex::eMutexTypeRecursive),
m_break_id (LLDB_INVALID_BREAK_ID)
{
@ -507,92 +507,249 @@ DynamicLoaderDarwinKernel::Clear (bool clear_process)
if (clear_process)
m_process = NULL;
m_kernel.Clear(false);
m_kernel.Clear();
m_known_kexts.clear();
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)
DynamicLoaderDarwinKernel::KextImageInfo::LoadImageAtFileAddress (Process *process)
{
if (IsLoaded())
return true;
if (module_sp)
if (m_module_sp)
{
bool changed = false;
if (module_sp->SetLoadAddress (process->GetTarget(), 0, changed))
load_process_stop_id = process->GetStopID();
if (m_module_sp->SetLoadAddress (process->GetTarget(), 0, changed))
m_load_process_stop_id = process->GetStopID();
}
return false;
}
void
DynamicLoaderDarwinKernel::KextImageInfo::SetModule (ModuleSP module_sp)
{
m_module_sp = module_sp;
if (module_sp.get() && module_sp->GetObjectFile())
{
if (module_sp->GetObjectFile()->GetType() == ObjectFile::eTypeExecutable
&& module_sp->GetObjectFile()->GetStrata() == ObjectFile::eStrataKernel)
{
m_kernel_image = true;
}
else
{
m_kernel_image = false;
}
}
}
ModuleSP
DynamicLoaderDarwinKernel::KextImageInfo::GetModule ()
{
return m_module_sp;
}
void
DynamicLoaderDarwinKernel::KextImageInfo::SetLoadAddress (addr_t load_addr)
{
m_load_address = load_addr;
}
addr_t
DynamicLoaderDarwinKernel::KextImageInfo::GetLoadAddress () const
{
return m_load_address;
}
uint64_t
DynamicLoaderDarwinKernel::KextImageInfo::GetSize () const
{
return m_size;
}
void
DynamicLoaderDarwinKernel::KextImageInfo::SetSize (uint64_t size)
{
m_size = size;
}
uint32_t
DynamicLoaderDarwinKernel::KextImageInfo::GetProcessStopId () const
{
return m_load_process_stop_id;
}
void
DynamicLoaderDarwinKernel::KextImageInfo::SetProcessStopId (uint32_t stop_id)
{
m_load_process_stop_id = stop_id;
}
bool
DynamicLoaderDarwinKernel::OSKextLoadedKextSummary::LoadImageUsingMemoryModule (Process *process)
DynamicLoaderDarwinKernel::KextImageInfo::operator== (const KextImageInfo &rhs)
{
if (m_uuid.IsValid() || rhs.GetUUID().IsValid())
{
if (m_uuid == rhs.GetUUID())
{
return true;
}
return false;
}
if (m_name == rhs.GetName() && m_load_address == rhs.GetLoadAddress())
return true;
return false;
}
void
DynamicLoaderDarwinKernel::KextImageInfo::SetName (const char *name)
{
m_name = name;
}
std::string
DynamicLoaderDarwinKernel::KextImageInfo::GetName () const
{
return m_name;
}
void
DynamicLoaderDarwinKernel::KextImageInfo::SetUUID (const UUID &uuid)
{
m_uuid = uuid;
}
UUID
DynamicLoaderDarwinKernel::KextImageInfo::GetUUID () const
{
return m_uuid;
}
// Given the m_load_address from the kext summaries, and a UUID, try to create an in-memory
// Module at that address. Require that the MemoryModule have a matching UUID and detect
// if this MemoryModule is a kernel or a kext.
//
// Returns true if m_memory_module_sp is now set to a valid Module.
bool
DynamicLoaderDarwinKernel::KextImageInfo::ReadMemoryModule (Process *process)
{
if (m_memory_module_sp.get() != NULL)
return true;
if (m_load_address == LLDB_INVALID_ADDRESS)
return false;
FileSpec file_spec;
file_spec.SetFile (m_name.c_str(), false);
ModuleSP memory_module_sp = process->ReadModuleFromMemory (file_spec, m_load_address);
if (memory_module_sp.get() == NULL)
return false;
bool is_kernel = false;
if (memory_module_sp->GetObjectFile())
{
if (memory_module_sp->GetObjectFile()->GetType() == ObjectFile::eTypeExecutable
&& memory_module_sp->GetObjectFile()->GetStrata() == ObjectFile::eStrataKernel)
{
is_kernel = true;
}
else if (memory_module_sp->GetObjectFile()->GetType() == ObjectFile::eTypeSharedLibrary)
{
is_kernel = false;
}
}
// If the kernel specified what UUID we should find at this load address,
// require that the memory module have a matching UUID or something has gone
// wrong and we should discard it.
if (m_uuid.IsValid())
{
if (m_uuid != memory_module_sp->GetUUID())
{
return false;
}
}
// If the in-memory Module has a UUID, let's use that.
if (!m_uuid.IsValid() && memory_module_sp->GetUUID().IsValid())
{
m_uuid = memory_module_sp->GetUUID();
}
m_memory_module_sp = memory_module_sp;
m_kernel_image = is_kernel;
if (is_kernel)
{
if (memory_module_sp->GetArchitecture().IsValid())
{
process->GetTarget().SetArchitecture(memory_module_sp->GetArchitecture());
}
}
return true;
}
bool
DynamicLoaderDarwinKernel::KextImageInfo::IsKernel () const
{
return m_kernel_image == true;
}
void
DynamicLoaderDarwinKernel::KextImageInfo::SetIsKernel (bool is_kernel)
{
m_kernel_image = is_kernel;
}
bool
DynamicLoaderDarwinKernel::KextImageInfo::LoadImageUsingMemoryModule (Process *process)
{
if (IsLoaded())
return true;
bool uuid_is_valid = uuid.IsValid();
bool memory_module_is_kernel = false;
Target &target = process->GetTarget();
ModuleSP memory_module_sp;
// If this is a kext and the user asked us to ignore kexts, don't try to load it.
if (kernel_image == false && GetGlobalProperties()->GetLoadKexts() == false)
// If we don't have / can't create a memory module for this kext, don't try to load it - we won't
// have the correct segment load addresses.
if (!ReadMemoryModule (process))
{
return false;
}
// Use the memory module as the module if we have one
if (address != LLDB_INVALID_ADDRESS)
// If this is a kext and the user asked us to ignore kexts, don't try to load it.
if (!IsKernel() && GetGlobalProperties()->GetLoadKexts() == false)
{
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);
if (memory_module_sp && !uuid_is_valid)
{
uuid = memory_module_sp->GetUUID();
uuid_is_valid = uuid.IsValid();
}
if (memory_module_sp
&& memory_module_sp->GetObjectFile()
&& memory_module_sp->GetObjectFile()->GetType() == ObjectFile::eTypeExecutable
&& memory_module_sp->GetObjectFile()->GetStrata() == ObjectFile::eStrataKernel)
{
memory_module_is_kernel = true;
if (memory_module_sp->GetArchitecture().IsValid())
{
target.SetArchitecture(memory_module_sp->GetArchitecture());
}
}
return false;
}
if (!module_sp)
{
if (uuid_is_valid)
bool uuid_is_valid = m_uuid.IsValid();
if (!m_module_sp)
{
// See if the kext has already been loaded into the target, probably by the user doing target modules add.
const ModuleList &target_images = target.GetImages();
module_sp = target_images.FindModule(uuid);
m_module_sp = target_images.FindModule(m_uuid);
if (!module_sp)
// Search for the kext on the local filesystem via the UUID
if (!m_module_sp && uuid_is_valid)
{
ModuleSpec module_spec;
module_spec.GetUUID() = uuid;
module_spec.GetUUID() = m_uuid;
module_spec.GetArchitecture() = target.GetArchitecture();
// For the kernel, we really do need an on-disk file copy of the
// binary.
// For the kernel, we really do need an on-disk file copy of the binary.
bool force_symbols_search = false;
if (memory_module_is_kernel)
if (IsKernel())
{
force_symbols_search = true;
}
@ -601,35 +758,46 @@ DynamicLoaderDarwinKernel::OSKextLoadedKextSummary::LoadImageUsingMemoryModule (
{
if (module_spec.GetFileSpec().Exists())
{
module_sp.reset(new Module (module_spec.GetFileSpec(), target.GetArchitecture()));
if (module_sp.get() && module_sp->MatchesModuleSpec (module_spec))
m_module_sp.reset(new Module (module_spec.GetFileSpec(), target.GetArchitecture()));
if (m_module_sp.get() && m_module_sp->MatchesModuleSpec (module_spec))
{
ModuleList loaded_module_list;
loaded_module_list.Append (module_sp);
loaded_module_list.Append (m_module_sp);
target.ModulesDidLoad (loaded_module_list);
}
}
}
// Ask the Target to find this file on the local system, if possible.
// Failing that, ask the Target to find this file on the local system, if possible.
// This will search in the list of currently-loaded files, look in the
// standard search paths on the system, and on a Mac it will try calling
// the DebugSymbols framework with the UUID to find the binary via its
// search methods.
if (!module_sp)
if (!m_module_sp)
{
module_sp = target.GetSharedModule (module_spec);
m_module_sp = target.GetSharedModule (module_spec);
}
}
// If we managed to find a module, append it to the target's list of images
if (module_sp && module_sp->GetUUID() == memory_module_sp->GetUUID())
// If we managed to find a module, append it to the target's list of images.
// If we also have a memory module, require that they have matching UUIDs
if (m_module_sp)
{
target.GetImages().Append(module_sp);
if (memory_module_is_kernel && target.GetExecutableModulePointer() != module_sp.get())
bool uuid_match_ok = true;
if (m_memory_module_sp)
{
target.SetExecutableModule (module_sp, false);
if (m_module_sp->GetUUID() != m_memory_module_sp->GetUUID())
{
uuid_match_ok = false;
}
}
if (uuid_match_ok)
{
target.GetImages().Append(m_module_sp);
if (IsKernel() && target.GetExecutableModulePointer() != m_module_sp.get())
{
target.SetExecutableModule (m_module_sp, false);
}
}
}
}
@ -637,18 +805,17 @@ DynamicLoaderDarwinKernel::OSKextLoadedKextSummary::LoadImageUsingMemoryModule (
static ConstString g_section_name_LINKEDIT ("__LINKEDIT");
if (memory_module_sp && module_sp)
if (m_memory_module_sp && m_module_sp)
{
if (module_sp->GetUUID() == memory_module_sp->GetUUID())
if (m_module_sp->GetUUID() == m_memory_module_sp->GetUUID())
{
ObjectFile *ondisk_object_file = module_sp->GetObjectFile();
ObjectFile *memory_object_file = memory_module_sp->GetObjectFile();
ObjectFile *ondisk_object_file = m_module_sp->GetObjectFile();
ObjectFile *memory_object_file = m_memory_module_sp->GetObjectFile();
if (memory_object_file && ondisk_object_file)
{
// Kexts are classified with a type of ObjectFile::eTypeSharedLibrary and
// a strata of ObjectFile::eStrataKernel. Ignore __LINKEDIT for kexts
const bool ignore_linkedit = ondisk_object_file->GetType() == ObjectFile::eTypeSharedLibrary;
// The memory_module for kexts may have an invalid __LINKEDIT seg; skip it.
const bool ignore_linkedit = !IsKernel ();
SectionList *ondisk_section_list = ondisk_object_file->GetSectionList ();
SectionList *memory_section_list = memory_object_file->GetSectionList ();
@ -688,48 +855,39 @@ DynamicLoaderDarwinKernel::OSKextLoadedKextSummary::LoadImageUsingMemoryModule (
}
}
if (num_sections_loaded > 0)
load_process_stop_id = process->GetStopID();
m_load_process_stop_id = process->GetStopID();
else
module_sp.reset(); // No sections were loaded
m_module_sp.reset(); // No sections were loaded
}
else
module_sp.reset(); // One or both section lists
m_module_sp.reset(); // One or both section lists
}
else
module_sp.reset(); // One or both object files missing
m_module_sp.reset(); // One or both object files missing
}
else
module_sp.reset(); // UUID mismatch
m_module_sp.reset(); // UUID mismatch
}
bool is_loaded = IsLoaded();
if (so_address.IsValid())
{
if (is_loaded)
so_address.SetLoadAddress (address, &target);
else
target.GetImages().ResolveFileAddress (address, so_address);
}
if (is_loaded && module_sp && memory_module_is_kernel)
if (is_loaded && m_module_sp && IsKernel())
{
Stream *s = &target.GetDebugger().GetOutputStream();
if (s)
{
char uuidbuf[64];
s->Printf ("Kernel UUID: %s\n", module_sp->GetUUID().GetAsCString(uuidbuf, sizeof (uuidbuf)));
s->Printf ("Load Address: 0x%" PRIx64 "\n", address);
if (module_sp->GetFileSpec().GetDirectory().IsEmpty())
s->Printf ("Kernel UUID: %s\n", m_module_sp->GetUUID().GetAsCString(uuidbuf, sizeof (uuidbuf)));
s->Printf ("Load Address: 0x%" PRIx64 "\n", m_load_address);
if (m_module_sp->GetFileSpec().GetDirectory().IsEmpty())
{
s->Printf ("Loaded kernel file %s\n", module_sp->GetFileSpec().GetFilename().AsCString());
s->Printf ("Loaded kernel file %s\n", m_module_sp->GetFileSpec().GetFilename().AsCString());
}
else
{
s->Printf ("Loaded kernel file %s/%s\n",
module_sp->GetFileSpec().GetDirectory().AsCString(),
module_sp->GetFileSpec().GetFilename().AsCString());
m_module_sp->GetFileSpec().GetDirectory().AsCString(),
m_module_sp->GetFileSpec().GetFilename().AsCString());
}
s->Flush ();
}
@ -738,26 +896,32 @@ DynamicLoaderDarwinKernel::OSKextLoadedKextSummary::LoadImageUsingMemoryModule (
}
uint32_t
DynamicLoaderDarwinKernel::OSKextLoadedKextSummary::GetAddressByteSize ()
DynamicLoaderDarwinKernel::KextImageInfo::GetAddressByteSize ()
{
if (module_sp)
return module_sp->GetArchitecture().GetAddressByteSize();
if (m_memory_module_sp)
return m_memory_module_sp->GetArchitecture().GetAddressByteSize();
if (m_module_sp)
return m_module_sp->GetArchitecture().GetAddressByteSize();
return 0;
}
lldb::ByteOrder
DynamicLoaderDarwinKernel::OSKextLoadedKextSummary::GetByteOrder()
DynamicLoaderDarwinKernel::KextImageInfo::GetByteOrder()
{
if (module_sp)
return module_sp->GetArchitecture().GetByteOrder();
if (m_memory_module_sp)
return m_memory_module_sp->GetArchitecture().GetByteOrder();
if (m_module_sp)
return m_module_sp->GetArchitecture().GetByteOrder();
return lldb::endian::InlHostByteOrder();
}
lldb_private::ArchSpec
DynamicLoaderDarwinKernel::OSKextLoadedKextSummary::GetArchitecture () const
DynamicLoaderDarwinKernel::KextImageInfo::GetArchitecture () const
{
if (module_sp)
return module_sp->GetArchitecture();
if (m_memory_module_sp)
return m_memory_module_sp->GetArchitecture();
if (m_module_sp)
return m_module_sp->GetArchitecture();
return lldb_private::ArchSpec ();
}
@ -773,53 +937,52 @@ DynamicLoaderDarwinKernel::LoadKernelModuleIfNeeded()
{
if (!m_kext_summary_header_ptr_addr.IsValid())
{
m_kernel.Clear(false);
m_kernel.module_sp = m_process->GetTarget().GetExecutableModule();
m_kernel.kernel_image = true;
m_kernel.Clear();
m_kernel.SetModule (m_process->GetTarget().GetExecutableModule());
m_kernel.SetIsKernel(true);
ConstString kernel_name("mach_kernel");
if (m_kernel.module_sp.get()
&& m_kernel.module_sp->GetObjectFile()
&& !m_kernel.module_sp->GetObjectFile()->GetFileSpec().GetFilename().IsEmpty())
if (m_kernel.GetModule().get()
&& m_kernel.GetModule()->GetObjectFile()
&& !m_kernel.GetModule()->GetObjectFile()->GetFileSpec().GetFilename().IsEmpty())
{
kernel_name = m_kernel.module_sp->GetObjectFile()->GetFileSpec().GetFilename();
kernel_name = m_kernel.GetModule()->GetObjectFile()->GetFileSpec().GetFilename();
}
strncpy (m_kernel.name, kernel_name.AsCString(), sizeof(m_kernel.name));
m_kernel.name[sizeof (m_kernel.name) - 1] = '\0';
m_kernel.SetName (kernel_name.AsCString());
if (m_kernel.address == LLDB_INVALID_ADDRESS)
if (m_kernel.GetLoadAddress() == LLDB_INVALID_ADDRESS)
{
m_kernel.address = m_kernel_load_address;
if (m_kernel.address == LLDB_INVALID_ADDRESS && m_kernel.module_sp)
m_kernel.SetLoadAddress(m_kernel_load_address);
if (m_kernel.GetLoadAddress() == LLDB_INVALID_ADDRESS && m_kernel.GetModule())
{
// 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();
ObjectFile *kernel_object_file = m_kernel.GetModule()->GetObjectFile();
if (kernel_object_file)
{
addr_t load_address = kernel_object_file->GetHeaderAddress().GetLoadAddress(&m_process->GetTarget());
addr_t file_address = kernel_object_file->GetHeaderAddress().GetFileAddress();
if (load_address != LLDB_INVALID_ADDRESS && load_address != 0)
{
m_kernel.address = load_address;
m_kernel.SetLoadAddress (load_address);
if (load_address != file_address)
{
// Don't accidentally relocate the kernel to the File address --
// the Load address has already been set to its actual in-memory address.
// Mark it as IsLoaded.
m_kernel.load_process_stop_id = m_process->GetStopID();
m_kernel.SetProcessStopId (m_process->GetStopID());
}
}
else
{
m_kernel.address = file_address;
m_kernel.SetLoadAddress(file_address);
}
}
}
}
if (m_kernel.address != LLDB_INVALID_ADDRESS)
if (m_kernel.GetLoadAddress() != LLDB_INVALID_ADDRESS)
{
if (!m_kernel.LoadImageUsingMemoryModule (m_process))
{
@ -827,10 +990,10 @@ DynamicLoaderDarwinKernel::LoadKernelModuleIfNeeded()
}
}
if (m_kernel.IsLoaded() && m_kernel.module_sp)
if (m_kernel.IsLoaded() && m_kernel.GetModule())
{
static ConstString kext_summary_symbol ("gLoadedKextSummaries");
const Symbol *symbol = m_kernel.module_sp->FindFirstSymbolWithNameAndType (kext_summary_symbol, eSymbolTypeData);
const Symbol *symbol = m_kernel.GetModule()->FindFirstSymbolWithNameAndType (kext_summary_symbol, eSymbolTypeData);
if (symbol)
{
m_kext_summary_header_ptr_addr = symbol->GetAddress();
@ -840,7 +1003,7 @@ DynamicLoaderDarwinKernel::LoadKernelModuleIfNeeded()
}
else
{
m_kernel.Clear(false);
m_kernel.Clear();
}
}
}
@ -885,7 +1048,6 @@ DynamicLoaderDarwinKernel::ReadKextSummaryHeader ()
// 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 ();
@ -930,61 +1092,186 @@ DynamicLoaderDarwinKernel::ReadKextSummaryHeader ()
return false;
}
// We've either (a) just attached to a new kernel, or (b) the kexts-changed breakpoint was hit
// and we need to figure out what kexts have been added or removed.
// Read the kext summaries from the inferior kernel memory, compare them against the
// m_known_kexts vector and update the m_known_kexts vector as needed to keep in sync with the
// inferior.
bool
DynamicLoaderDarwinKernel::ParseKextSummaries (const Address &kext_summary_addr,
uint32_t count)
DynamicLoaderDarwinKernel::ParseKextSummaries (const Address &kext_summary_addr, uint32_t count)
{
OSKextLoadedKextSummary::collection kext_summaries;
KextImageInfo::collection kext_summaries;
LogSP log(GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER));
if (log)
log->Printf ("Adding %d modules.\n", count);
log->Printf ("Kexts-changed breakpoint hit, there are %d kexts currently.\n", count);
Mutex::Locker locker(m_mutex);
if (!ReadKextSummaries (kext_summary_addr, count, kext_summaries))
return false;
// By default, all kexts we've loaded in the past are marked as "remove" and all of the kexts
// we just found out about from ReadKextSummaries are marked as "add".
std::vector<bool> to_be_removed(m_known_kexts.size(), true);
std::vector<bool> to_be_added(count, true);
int number_of_new_kexts_being_added = 0;
int number_of_old_kexts_being_removed = m_known_kexts.size();
const uint32_t new_kexts_size = kext_summaries.size();
const uint32_t old_kexts_size = m_known_kexts.size();
// The m_known_kexts vector may have entries that have been Cleared,
// or are a kernel.
for (uint32_t old_kext = 0; old_kext < old_kexts_size; old_kext++)
{
bool ignore = false;
KextImageInfo &image_info = m_known_kexts[old_kext];
if (image_info.IsKernel())
{
ignore = true;
}
else if (image_info.GetLoadAddress() == LLDB_INVALID_ADDRESS && !image_info.GetModule())
{
ignore = true;
}
if (ignore)
{
number_of_old_kexts_being_removed--;
to_be_removed[old_kext] = false;
}
}
// Scan over the list of kexts we just read from the kernel, note those that
// need to be added and those already loaded.
for (uint32_t new_kext = 0; new_kext < new_kexts_size; new_kext++)
{
bool add_this_one = true;
for (uint32_t old_kext = 0; old_kext < old_kexts_size; old_kext++)
{
if (m_known_kexts[old_kext] == kext_summaries[new_kext])
{
// We already have this kext, don't re-load it.
to_be_added[new_kext] = false;
// This kext is still present, do not remove it.
to_be_removed[old_kext] = false;
number_of_old_kexts_being_removed--;
add_this_one = false;
break;
}
}
if (add_this_one)
{
number_of_new_kexts_being_added++;
}
}
if (number_of_new_kexts_being_added == 0 && number_of_old_kexts_being_removed == 0)
return true;
Stream *s = &m_process->GetTarget().GetDebugger().GetOutputStream();
if (s)
s->Printf ("Loading %d kext modules ", count);
for (uint32_t i = 0; i < count; i++)
{
if (!kext_summaries[i].LoadImageUsingMemoryModule (m_process))
kext_summaries[i].LoadImageAtFileAddress (m_process);
if (number_of_new_kexts_being_added > 0 && number_of_old_kexts_being_removed > 0)
{
s->Printf ("Loading %d kext modules and unloading %d kext modules ", number_of_new_kexts_being_added, number_of_old_kexts_being_removed);
}
else if (number_of_new_kexts_being_added > 0)
{
s->Printf ("Loading %d kext modules ", number_of_new_kexts_being_added);
}
else if (number_of_old_kexts_being_removed > 0)
{
s->Printf ("Unloading %d kext modules ", number_of_old_kexts_being_removed);
}
}
if (log)
log->Printf ("DynamicLoaderDarwinKernel::ParseKextSummaries: %d kexts added, %d kexts removed", number_of_new_kexts_being_added, number_of_old_kexts_being_removed);
if (number_of_new_kexts_being_added > 0)
{
ModuleList loaded_module_list;
const uint32_t num_of_new_kexts = kext_summaries.size();
for (uint32_t new_kext = 0; new_kext < num_of_new_kexts; new_kext++)
{
if (to_be_added[new_kext] == true)
{
KextImageInfo &image_info = kext_summaries[new_kext];
if (!image_info.LoadImageUsingMemoryModule (m_process))
image_info.LoadImageAtFileAddress (m_process);
m_known_kexts.push_back(image_info);
if (image_info.GetModule() && m_process->GetStopID() == image_info.GetProcessStopId())
loaded_module_list.AppendIfNeeded (image_info.GetModule());
if (s)
s->Printf (".");
if (log)
kext_summaries[i].PutToLog (log.get());
kext_summaries[new_kext].PutToLog (log.get());
}
}
m_process->GetTarget().ModulesDidLoad (loaded_module_list);
}
if (number_of_old_kexts_being_removed > 0)
{
ModuleList loaded_module_list;
const uint32_t num_of_old_kexts = m_known_kexts.size();
for (uint32_t old_kext = 0; old_kext < num_of_old_kexts; old_kext++)
{
ModuleList unloaded_module_list;
if (to_be_removed[old_kext])
{
KextImageInfo &image_info = m_known_kexts[old_kext];
// You can't unload the kernel.
if (!image_info.IsKernel())
{
if (image_info.GetModule())
{
unloaded_module_list.AppendIfNeeded (image_info.GetModule());
}
if (s)
s->Printf (".");
image_info.Clear();
// should pull it out of the KextImageInfos vector but that would mutate the list and invalidate
// the to_be_removed bool vector; leaving it in place once Cleared() is relatively harmless.
}
}
m_process->GetTarget().ModulesDidUnload (unloaded_module_list);
}
}
if (s)
{
s->Printf (" done.\n");
s->Flush ();
}
bool return_value = AddModulesUsingImageInfos (kext_summaries);
return return_value;
return true;
}
// Adds the modules in image_infos to m_kext_summaries.
// NB don't call this passing in m_kext_summaries.
// Adds the modules in image_infos to m_known_kexts.
bool
DynamicLoaderDarwinKernel::AddModulesUsingImageInfos (OSKextLoadedKextSummary::collection &image_infos)
DynamicLoaderDarwinKernel::AddModulesUsingImageInfos (KextImageInfo::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);
KextImageInfo &image_info = image_infos[idx];
m_known_kexts.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 (image_info.GetModule() && m_process->GetStopID() == image_info.GetProcessStopId())
loaded_module_list.AppendIfNeeded (image_infos[idx].GetModule());
}
m_process->GetTarget().ModulesDidLoad (loaded_module_list);
@ -995,7 +1282,7 @@ DynamicLoaderDarwinKernel::AddModulesUsingImageInfos (OSKextLoadedKextSummary::c
uint32_t
DynamicLoaderDarwinKernel::ReadKextSummaries (const Address &kext_summary_addr,
uint32_t image_infos_count,
OSKextLoadedKextSummary::collection &image_infos)
KextImageInfo::collection &image_infos)
{
const ByteOrder endian = m_kernel.GetByteOrder();
const uint32_t addr_size = m_kernel.GetAddressByteSize();
@ -1024,23 +1311,11 @@ DynamicLoaderDarwinKernel::ReadKextSummaries (const Address &kext_summary_addr,
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;
}
image_infos[i].SetName ((const char *) name_data);
UUID uuid (extractor.GetData (&offset, 16), 16);
image_infos[i].SetUUID (uuid);
image_infos[i].SetLoadAddress (extractor.GetU64(&offset));
image_infos[i].SetSize (extractor.GetU64(&offset));
}
if (i < image_infos.size())
image_infos.resize(i);
@ -1067,7 +1342,7 @@ DynamicLoaderDarwinKernel::ReadAllKextSummaries ()
summary_addr.Slide(m_kext_summary_header.GetSize());
if (!ParseKextSummaries (summary_addr, m_kext_summary_header.entry_count))
{
m_kext_summaries.clear();
m_known_kexts.clear();
}
return true;
}
@ -1079,13 +1354,13 @@ DynamicLoaderDarwinKernel::ReadAllKextSummaries ()
// Dump an image info structure to the file handle provided.
//----------------------------------------------------------------------
void
DynamicLoaderDarwinKernel::OSKextLoadedKextSummary::PutToLog (Log *log) const
DynamicLoaderDarwinKernel::KextImageInfo::PutToLog (Log *log) const
{
if (log == NULL)
return;
const uint8_t *u = (uint8_t *)uuid.GetBytes();
const uint8_t *u = (uint8_t *) m_uuid.GetBytes();
if (address == LLDB_INVALID_ADDRESS)
if (m_load_address == LLDB_INVALID_ADDRESS)
{
if (u)
{
@ -1094,26 +1369,25 @@ DynamicLoaderDarwinKernel::OSKextLoadedKextSummary::PutToLog (Log *log) const
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);
m_name.c_str());
}
else
log->Printf("\tname=\"%s\" (UNLOADED)", name);
log->Printf("\tname=\"%s\" (UNLOADED)", m_name.c_str());
}
else
{
if (u)
{
log->Printf("\taddr=0x%16.16" PRIx64 " size=0x%16.16" PRIx64 " version=0x%16.16" PRIx64 " load-tag=0x%8.8x flags=0x%8.8x ref-list=0x%16.16" PRIx64 " 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,
log->Printf("\taddr=0x%16.16" PRIx64 " size=0x%16.16" PRIx64 " 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\"",
m_load_address, m_size,
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);
m_name.c_str());
}
else
{
log->Printf("\t[0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ") version=0x%16.16" PRIx64 " load-tag=0x%8.8x flags=0x%8.8x ref-list=0x%16.16" PRIx64 " name=\"%s\"",
address, address+size, version, load_tag, flags, reference_list,
name);
log->Printf("\t[0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ") name=\"%s\"",
m_load_address, m_load_address+m_size, m_name.c_str());
}
}
}
@ -1136,12 +1410,12 @@ DynamicLoaderDarwinKernel::PutToLog(Log *log) const
m_kext_summary_header.entry_count);
size_t i;
const size_t count = m_kext_summaries.size();
const size_t count = m_known_kexts.size();
if (count > 0)
{
log->PutCString("Loaded:");
for (i = 0; i<count; i++)
m_kext_summaries[i].PutToLog(log);
m_known_kexts[i].PutToLog(log);
}
}
@ -1156,7 +1430,7 @@ DynamicLoaderDarwinKernel::PrivateInitialize(Process *process)
void
DynamicLoaderDarwinKernel::SetNotificationBreakpointIfNeeded ()
{
if (m_break_id == LLDB_INVALID_BREAK_ID && m_kernel.module_sp)
if (m_break_id == LLDB_INVALID_BREAK_ID && m_kernel.GetModule())
{
DEBUG_PRINTF("DynamicLoaderDarwinKernel::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState()));
@ -1164,7 +1438,7 @@ DynamicLoaderDarwinKernel::SetNotificationBreakpointIfNeeded ()
const bool internal_bp = true;
const LazyBool skip_prologue = eLazyBoolNo;
FileSpecList module_spec_list;
module_spec_list.Append (m_kernel.module_sp->GetFileSpec());
module_spec_list.Append (m_kernel.GetModule()->GetFileSpec());
Breakpoint *bp = m_process->GetTarget().CreateBreakpoint (&module_spec_list,
NULL,
"OSKextLoadedKextSummariesUpdated",

View File

@ -54,6 +54,7 @@ public:
virtual
~DynamicLoaderDarwinKernel ();
//------------------------------------------------------------------
/// Called after attaching a process.
///
@ -134,59 +135,50 @@ protected:
KERNEL_MODULE_ENTRY_SIZE_VERSION_1 = 64u + 16u + 8u + 8u + 8u + 4u + 4u
};
struct OSKextLoadedKextSummary
{
char name[KERNEL_MODULE_MAX_NAME];
lldb::ModuleSP module_sp;
uint32_t load_process_stop_id;
lldb_private::UUID uuid; // UUID for this dylib if it has one, else all zeros
lldb_private::Address so_address; // The section offset address for this kext in case it can be read from object files
uint64_t address;
uint64_t size;
uint64_t version;
uint32_t load_tag;
uint32_t flags;
uint64_t reference_list;
bool kernel_image; // true if this is the kernel, false if this is a kext
// class KextImageInfo represents a single kext or kernel binary image.
// The class was designed to hold the information from the OSKextLoadedKextSummary
// structure (in libkern/libkern/OSKextLibPrivate.h from xnu). The kernel maintains
// a list of loded kexts in memory (the OSKextLoadedKextSummaryHeader structure,
// which points to an array of OSKextLoadedKextSummary's).
//
// A KextImageInfos may have -
//
// 1. The load address, name, UUID, and size of a kext/kernel binary in memory
// (read straight out of the kernel's list-of-kexts loaded)
// 2. A ModuleSP based on a MemoryModule read out of the kernel's memory
// (very unlikely to have any symbolic information)
// 3. A ModuleSP for an on-disk copy of the kext binary, possibly with debug info
// or a dSYM
//
// For performance reasons, the developer may prefer that lldb not load the kexts out
// of memory at the start of a kernel session. But we should build up / maintain a
// list of kexts that the kernel has told us about so we can relocate a kext module
// later if the user explicitly adds it to the target.
OSKextLoadedKextSummary() :
module_sp (),
load_process_stop_id (UINT32_MAX),
uuid (),
so_address (),
address (LLDB_INVALID_ADDRESS),
size (0),
version (0),
load_tag (0),
flags (0),
reference_list (0),
kernel_image (false)
class KextImageInfo
{
name[0] = '\0';
}
bool
IsLoaded ()
{
return load_process_stop_id != UINT32_MAX;
}
public:
KextImageInfo () :
m_name (),
m_module_sp (),
m_memory_module_sp (),
m_load_process_stop_id (UINT32_MAX),
m_uuid (),
m_load_address (LLDB_INVALID_ADDRESS),
m_size (0),
m_kernel_image (false)
{ }
void
Clear (bool load_cmd_data_only)
Clear ()
{
if (!load_cmd_data_only)
{
so_address.Clear();
address = LLDB_INVALID_ADDRESS;
size = 0;
version = 0;
load_tag = 0;
flags = 0;
reference_list = 0;
name[0] = '\0';
}
module_sp.reset();
load_process_stop_id = UINT32_MAX;
m_load_address = LLDB_INVALID_ADDRESS;
m_size = 0;
m_name.clear ();
m_uuid.Clear();
m_module_sp.reset();
m_memory_module_sp.reset();
m_load_process_stop_id = UINT32_MAX;
}
bool
@ -195,41 +187,87 @@ protected:
bool
LoadImageUsingMemoryModule (lldb_private::Process *process);
// bool
// operator == (const OSKextLoadedKextSummary& rhs) const
// {
// return address == rhs.address
// && size == rhs.size
// //&& module_sp.get() == rhs.module_sp.get()
// && uuid == rhs.uuid
// && version == rhs.version
// && load_tag == rhs.load_tag
// && flags == rhs.flags
// && reference_list == rhs.reference_list
// && strncmp (name, rhs.name, KERNEL_MODULE_MAX_NAME) == 0;
// }
//
bool
UUIDValid() const
IsLoaded ()
{
return uuid.IsValid();
return m_load_process_stop_id != UINT32_MAX;
}
void
SetLoadAddress (lldb::addr_t load_addr); // Address of the Mach-O header for this binary
lldb::addr_t
GetLoadAddress () const; // Address of the Mach-O header for this binary
lldb_private::UUID
GetUUID () const;
void
SetUUID (const lldb_private::UUID &uuid);
void
SetName (const char *);
std::string
GetName () const;
void
SetModule (lldb::ModuleSP module);
lldb::ModuleSP
GetModule ();
// try to fill in m_memory_module_sp from memory based on the m_load_address
bool
ReadMemoryModule (lldb_private::Process *process);
bool
IsKernel () const; // true if this is the mach_kernel; false if this is a kext
void
SetIsKernel (bool is_kernel);
uint64_t
GetSize () const;
void
SetSize (uint64_t size);
uint32_t
GetAddressByteSize ();
GetProcessStopId () const; // the stop-id when this binary was first noticed
void
SetProcessStopId (uint32_t stop_id);
bool
operator== (const KextImageInfo &rhs);
uint32_t
GetAddressByteSize (); // as determined by Mach-O header
lldb::ByteOrder
GetByteOrder();
GetByteOrder(); // as determined by Mach-O header
lldb_private::ArchSpec
GetArchitecture () const;
GetArchitecture () const; // as determined by Mach-O header
void
PutToLog (lldb_private::Log *log) const;
typedef std::vector<OSKextLoadedKextSummary> collection;
typedef std::vector<KextImageInfo> collection;
typedef collection::iterator iterator;
typedef collection::const_iterator const_iterator;
private:
std::string m_name;
lldb::ModuleSP m_module_sp;
lldb::ModuleSP m_memory_module_sp;
uint32_t m_load_process_stop_id; // the stop-id when this module was added to the Target
lldb_private::UUID m_uuid; // UUID for this dylib if it has one, else all zeros
lldb::addr_t m_load_address;
uint64_t m_size;
bool m_kernel_image; // true if this is the kernel, false if this is a kext
};
struct OSKextLoadedKextSummaryHeader
@ -296,17 +334,17 @@ protected:
uint32_t count);
bool
AddModulesUsingImageInfos (OSKextLoadedKextSummary::collection &image_infos);
AddModulesUsingImageInfos (KextImageInfo::collection &image_infos);
void
UpdateImageInfosHeaderAndLoadCommands(OSKextLoadedKextSummary::collection &image_infos,
UpdateImageInfosHeaderAndLoadCommands(KextImageInfo::collection &image_infos,
uint32_t infos_count,
bool update_executable);
uint32_t
ReadKextSummaries (const lldb_private::Address &kext_summary_addr,
uint32_t image_infos_count,
OSKextLoadedKextSummary::collection &image_infos);
KextImageInfo::collection &image_infos);
static lldb::addr_t
SearchForKernelAtSameLoadAddr (lldb_private::Process *process);
@ -324,11 +362,12 @@ protected:
CheckForKernelImageAtAddress (lldb::addr_t addr, lldb_private::Process *process);
lldb::addr_t m_kernel_load_address;
OSKextLoadedKextSummary m_kernel; // Info about the current kernel image being used
KextImageInfo m_kernel; // Info about the current kernel image being used
lldb_private::Address m_kext_summary_header_ptr_addr;
lldb_private::Address m_kext_summary_header_addr;
OSKextLoadedKextSummaryHeader m_kext_summary_header;
OSKextLoadedKextSummary::collection m_kext_summaries;
KextImageInfo::collection m_known_kexts;
mutable lldb_private::Mutex m_mutex;
lldb::user_id_t m_break_id;