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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/lldb-python.h"
#include "lldb/Utility/SafeMachO.h"
#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/Core/StreamFile.h"
#include "lldb/Host/Symbols.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/StackFrame.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/Thread.h"
#include "lldb/Target/ThreadPlanRunToAddress.h"
#include "Plugins/Platform/MacOSX/PlatformDarwinKernel.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;
// Progressively greater amounts of scanning we will allow
// For some targets very early in startup, we can't do any random reads of memory or we can crash the device
// so a setting is needed that can completely disable the KASLR scans.
enum KASLRScanType
{
eKASLRScanNone = 0, // No reading into the inferior at all
eKASLRScanLowgloAddresses, // Check one word of memory for a possible kernel addr, then see if a kernel is there
eKASLRScanNearPC, // Scan backwards from the current $pc looking for kernel; checking at 96 locations total
eKASLRScanExhaustiveScan // Scan through the entire possible kernel address range looking for a kernel
};
OptionEnumValueElement
g_kaslr_kernel_scan_enum_values[] =
{
{ eKASLRScanNone, "none", "Do not read memory looking for a Darwin kernel when attaching." },
{ eKASLRScanLowgloAddresses, "basic", "Check for the Darwin kernel's load addr in the lowglo page (boot-args=debug) only." },
{ eKASLRScanNearPC, "fast-scan", "Scan near the pc value on attach to find the Darwin kernel's load address."},
{ eKASLRScanExhaustiveScan, "exhaustive-scan", "Scan through the entire potential address range of Darwin kernel (only on 32-bit targets)."},
{ 0, NULL, NULL }
};
static PropertyDefinition
g_properties[] =
{
{ "load-kexts" , OptionValue::eTypeBoolean, true, true, NULL, NULL, "Automatically loads kext images when attaching to a kernel." },
{ "scan-type", OptionValue::eTypeEnum, true, eKASLRScanNearPC, NULL, g_kaslr_kernel_scan_enum_values, "Control how many reads lldb will make while searching for a Darwin kernel on attach." },
{ NULL , OptionValue::eTypeInvalid, false, 0 , NULL, NULL, NULL }
};
enum {
ePropertyLoadKexts,
ePropertyScanType
};
class DynamicLoaderDarwinKernelProperties : public Properties
{
public:
static ConstString &
GetSettingName ()
{
static ConstString g_setting_name("darwin-kernel");
return g_setting_name;
}
DynamicLoaderDarwinKernelProperties() :
Properties ()
{
m_collection_sp.reset (new OptionValueProperties(GetSettingName()));
m_collection_sp->Initialize(g_properties);
}
virtual
~DynamicLoaderDarwinKernelProperties()
{
}
bool
GetLoadKexts() const
{
const uint32_t idx = ePropertyLoadKexts;
return m_collection_sp->GetPropertyAtIndexAsBoolean (NULL, idx, g_properties[idx].default_uint_value != 0);
}
KASLRScanType
GetScanType() const
{
const uint32_t idx = ePropertyScanType;
return (KASLRScanType) m_collection_sp->GetPropertyAtIndexAsEnumeration (NULL, idx, g_properties[idx].default_uint_value);
}
};
typedef std::shared_ptr<DynamicLoaderDarwinKernelProperties> DynamicLoaderDarwinKernelPropertiesSP;
static const DynamicLoaderDarwinKernelPropertiesSP &
GetGlobalProperties()
{
static DynamicLoaderDarwinKernelPropertiesSP g_settings_sp;
if (!g_settings_sp)
g_settings_sp.reset (new DynamicLoaderDarwinKernelProperties ());
return g_settings_sp;
}
//----------------------------------------------------------------------
// 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)
{
if (!force)
{
// If the user provided an executable binary and it is not a kernel,
// this plugin should not create an instance.
Module* exe_module = process->GetTarget().GetExecutableModulePointer();
if (exe_module)
{
ObjectFile *object_file = exe_module->GetObjectFile();
if (object_file)
{
if (object_file->GetStrata() != ObjectFile::eStrataKernel)
{
return NULL;
}
}
}
// If the target's architecture does not look like an Apple environment,
// this plugin should not create an instance.
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:
if (triple_ref.getVendor() != llvm::Triple::Apple)
{
return NULL;
}
break;
// If we have triple like armv7-unknown-unknown, we should try looking for a Darwin kernel.
case llvm::Triple::UnknownOS:
break;
default:
return NULL;
break;
}
}
// At this point if there is an ExecutableModule, it is a kernel and the Target is some variant of an Apple system.
// If the Process hasn't provided the kernel load address, we need to look around in memory to find it.
addr_t kernel_load_address = SearchForDarwinKernel (process);
if (kernel_load_address != LLDB_INVALID_ADDRESS)
{
process->SetCanJIT(false);
return new DynamicLoaderDarwinKernel (process, kernel_load_address);
}
return NULL;
}
lldb::addr_t
DynamicLoaderDarwinKernel::SearchForDarwinKernel (Process *process)
{
addr_t kernel_load_address = process->GetImageInfoAddress();
if (kernel_load_address == LLDB_INVALID_ADDRESS)
{
kernel_load_address = SearchForKernelAtSameLoadAddr (process);
if (kernel_load_address == LLDB_INVALID_ADDRESS)
{
kernel_load_address = SearchForKernelWithDebugHints (process);
if (kernel_load_address == LLDB_INVALID_ADDRESS)
{
kernel_load_address = SearchForKernelNearPC (process);
if (kernel_load_address == LLDB_INVALID_ADDRESS)
{
kernel_load_address = SearchForKernelViaExhaustiveSearch (process);
}
}
}
}
return kernel_load_address;
}
//----------------------------------------------------------------------
// Check if the kernel binary is loaded in memory without a slide.
// First verify that the ExecutableModule is a kernel before we proceed.
// Returns the address of the kernel if one was found, else LLDB_INVALID_ADDRESS.
//----------------------------------------------------------------------
lldb::addr_t
DynamicLoaderDarwinKernel::SearchForKernelAtSameLoadAddr (Process *process)
{
Module *exe_module = process->GetTarget().GetExecutableModulePointer();
if (exe_module == NULL)
return LLDB_INVALID_ADDRESS;
ObjectFile *exe_objfile = exe_module->GetObjectFile();
if (exe_objfile == NULL)
return LLDB_INVALID_ADDRESS;
if (exe_objfile->GetType() != ObjectFile::eTypeExecutable || exe_objfile->GetStrata() != ObjectFile::eStrataKernel)
return LLDB_INVALID_ADDRESS;
if (!exe_objfile->GetHeaderAddress().IsValid())
return LLDB_INVALID_ADDRESS;
if (CheckForKernelImageAtAddress (exe_objfile->GetHeaderAddress().GetFileAddress(), process) == exe_module->GetUUID())
return exe_objfile->GetHeaderAddress().GetFileAddress();
return LLDB_INVALID_ADDRESS;
}
//----------------------------------------------------------------------
// If the debug flag is included in the boot-args nvram setting, the kernel's load address
// will be noted in the lowglo page at a fixed address
// Returns the address of the kernel if one was found, else LLDB_INVALID_ADDRESS.
//----------------------------------------------------------------------
lldb::addr_t
DynamicLoaderDarwinKernel::SearchForKernelWithDebugHints (Process *process)
{
if (GetGlobalProperties()->GetScanType() == eKASLRScanNone)
return LLDB_INVALID_ADDRESS;
Error read_err;
addr_t addr = LLDB_INVALID_ADDRESS;
if (process->GetTarget().GetArchitecture().GetAddressByteSize() == 8)
{
addr = process->ReadUnsignedIntegerFromMemory (0xffffff8000002010ULL, 8, LLDB_INVALID_ADDRESS, read_err);
if (CheckForKernelImageAtAddress (addr, process).IsValid())
{
return addr;
}
addr = process->ReadUnsignedIntegerFromMemory (0xffffff8000004010ULL, 8, LLDB_INVALID_ADDRESS, read_err);
if (CheckForKernelImageAtAddress (addr, process).IsValid())
{
return addr;
}
}
else
{
addr = process->ReadUnsignedIntegerFromMemory (0xffff0110, 4, LLDB_INVALID_ADDRESS, read_err);
if (CheckForKernelImageAtAddress (addr, process).IsValid())
{
return addr;
}
}
return LLDB_INVALID_ADDRESS;
}
//----------------------------------------------------------------------
// If the kernel is currently executing when lldb attaches, and we don't have
// a better way of finding the kernel's load address, try searching backwards
// from the current pc value looking for the kernel's Mach header in memory.
// Returns the address of the kernel if one was found, else LLDB_INVALID_ADDRESS.
//----------------------------------------------------------------------
lldb::addr_t
DynamicLoaderDarwinKernel::SearchForKernelNearPC (Process *process)
{
if (GetGlobalProperties()->GetScanType() == eKASLRScanNone
|| GetGlobalProperties()->GetScanType() == eKASLRScanLowgloAddresses)
{
return LLDB_INVALID_ADDRESS;
}
ThreadSP thread = process->GetThreadList().GetSelectedThread ();
if (thread.get() == NULL)
return LLDB_INVALID_ADDRESS;
addr_t pc = thread->GetRegisterContext ()->GetPC(LLDB_INVALID_ADDRESS);
if (pc == LLDB_INVALID_ADDRESS)
return LLDB_INVALID_ADDRESS;
addr_t kernel_range_low;
if (process->GetTarget().GetArchitecture().GetAddressByteSize() == 8)
{
kernel_range_low = 1ULL << 63;
}
else
{
kernel_range_low = 1ULL << 31;
}
// Outside the normal kernel address range, this is probably userland code running right now
if (pc < kernel_range_low)
return LLDB_INVALID_ADDRESS;
// The kernel will load at at one megabyte boundary (0x100000), or at that boundary plus
// an offset of one page (0x1000) or two, depending on the device.
// Round the current pc down to the nearest one megabyte boundary - the place where we will start searching.
addr_t addr = pc & ~0xfffff;
int i = 0;
while (i < 32 && pc >= kernel_range_low)
{
if (CheckForKernelImageAtAddress (addr, process).IsValid())
return addr;
if (CheckForKernelImageAtAddress (addr + 0x1000, process).IsValid())
return addr + 0x1000;
if (CheckForKernelImageAtAddress (addr + 0x2000, process).IsValid())
return addr + 0x2000;
if (CheckForKernelImageAtAddress (addr + 0x4000, process).IsValid())
return addr + 0x4000;
i++;
addr -= 0x100000;
}
return LLDB_INVALID_ADDRESS;
}
//----------------------------------------------------------------------
// Scan through the valid address range for a kernel binary.
// This is uselessly slow in 64-bit environments so we don't even try it.
// This scan is not enabled by default even for 32-bit targets.
// Returns the address of the kernel if one was found, else LLDB_INVALID_ADDRESS.
//----------------------------------------------------------------------
lldb::addr_t
DynamicLoaderDarwinKernel::SearchForKernelViaExhaustiveSearch (Process *process)
{
if (GetGlobalProperties()->GetScanType() != eKASLRScanExhaustiveScan)
{
return LLDB_INVALID_ADDRESS;
}
addr_t kernel_range_low, kernel_range_high;
if (process->GetTarget().GetArchitecture().GetAddressByteSize() == 8)
{
kernel_range_low = 1ULL << 63;
kernel_range_high = UINT64_MAX;
}
else
{
kernel_range_low = 1ULL << 31;
kernel_range_high = UINT32_MAX;
}
// Stepping through memory at one-megabyte resolution looking for a kernel
// rarely works (fast enough) with a 64-bit address space -- for now, let's
// not even bother. We may be attaching to something which *isn't* a kernel
// and we don't want to spin for minutes on-end looking for a kernel.
if (process->GetTarget().GetArchitecture().GetAddressByteSize() == 8)
return LLDB_INVALID_ADDRESS;
addr_t addr = kernel_range_low;
while (addr >= kernel_range_low && addr < kernel_range_high)
{
if (CheckForKernelImageAtAddress (addr, process).IsValid())
return addr;
if (CheckForKernelImageAtAddress (addr + 0x1000, process).IsValid())
return addr + 0x1000;
if (CheckForKernelImageAtAddress (addr + 0x2000, process).IsValid())
return addr + 0x2000;
if (CheckForKernelImageAtAddress (addr + 0x4000, process).IsValid())
return addr + 0x4000;
addr += 0x100000;
}
return LLDB_INVALID_ADDRESS;
}
//----------------------------------------------------------------------
// Given an address in memory, look to see if there is a kernel image at that
// address.
// Returns a UUID; if a kernel was not found at that address, UUID.IsValid() will be false.
//----------------------------------------------------------------------
lldb_private::UUID
DynamicLoaderDarwinKernel::CheckForKernelImageAtAddress (lldb::addr_t addr, Process *process)
{
if (addr == LLDB_INVALID_ADDRESS)
return UUID();
// First try a quick test -- read the first 4 bytes and see if there is a valid Mach-O magic field there
// (the first field of the mach_header/mach_header_64 struct).
Error read_error;
uint64_t result = process->ReadUnsignedIntegerFromMemory (addr, 4, LLDB_INVALID_ADDRESS, read_error);
if (result != llvm::MachO::MH_MAGIC_64
&& result != llvm::MachO::MH_MAGIC
&& result != llvm::MachO::MH_CIGAM
&& result != llvm::MachO::MH_CIGAM_64)
{
return UUID();
}
// Read the mach header and see whether it looks like a kernel
llvm::MachO::mach_header header;
if (process->DoReadMemory (addr, &header, sizeof(header), read_error) != sizeof(header))
return UUID();
if (header.magic == llvm::MachO::MH_CIGAM ||
header.magic == llvm::MachO::MH_CIGAM_64)
{
header.magic = llvm::ByteSwap_32(header.magic);
header.cputype = llvm::ByteSwap_32(header.cputype);
header.cpusubtype = llvm::ByteSwap_32(header.cpusubtype);
header.filetype = llvm::ByteSwap_32(header.filetype);
header.ncmds = llvm::ByteSwap_32(header.ncmds);
header.sizeofcmds = llvm::ByteSwap_32(header.sizeofcmds);
header.flags = llvm::ByteSwap_32(header.flags);
}
// A kernel is an executable which does not have the dynamic link object flag set.
if (header.filetype == llvm::MachO::MH_EXECUTE
&& (header.flags & llvm::MachO::MH_DYLDLINK) == 0)
{
// Create a full module to get the UUID
ModuleSP memory_module_sp = process->ReadModuleFromMemory (FileSpec ("temp_mach_kernel", false), addr);
if (!memory_module_sp.get())
return UUID();
ObjectFile *exe_objfile = memory_module_sp->GetObjectFile();
if (exe_objfile == NULL)
return UUID();
if (exe_objfile->GetType() == ObjectFile::eTypeExecutable && exe_objfile->GetStrata() == ObjectFile::eStrataKernel)
{
ArchSpec kernel_arch (eArchTypeMachO, header.cputype, header.cpusubtype);
if (!process->GetTarget().GetArchitecture().IsCompatibleMatch(kernel_arch))
{
process->GetTarget().SetArchitecture (kernel_arch);
}
return memory_module_sp->GetUUID();
}
}
return UUID();
}
//----------------------------------------------------------------------
// Constructor
//----------------------------------------------------------------------
DynamicLoaderDarwinKernel::DynamicLoaderDarwinKernel (Process* process, lldb::addr_t kernel_addr) :
DynamicLoader(process),
m_kernel_load_address (kernel_addr),
m_kernel(),
m_kext_summary_header_ptr_addr (),
m_kext_summary_header_addr (),
m_kext_summary_header (),
m_known_kexts (),
m_mutex(Mutex::eMutexTypeRecursive),
m_break_id (LLDB_INVALID_BREAK_ID)
{
Error error;
PlatformSP platform_sp(Platform::Create(PlatformDarwinKernel::GetPluginNameStatic(), error));
// Only select the darwin-kernel Platform if we've been asked to load kexts.
// It can take some time to scan over all of the kext info.plists and that
// shouldn't be done if kext loading is explicitly disabled.
if (platform_sp.get() && GetGlobalProperties()->GetLoadKexts())
{
process->GetTarget().SetPlatform (platform_sp);
}
}
//----------------------------------------------------------------------
// 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();
m_known_kexts.clear();
m_kext_summary_header_ptr_addr.Clear();
m_kext_summary_header_addr.Clear();
m_break_id = LLDB_INVALID_BREAK_ID;
}
bool
DynamicLoaderDarwinKernel::KextImageInfo::LoadImageAtFileAddress (Process *process)
{
if (IsLoaded())
return true;
if (m_module_sp)
{
bool changed = false;
if (m_module_sp->SetLoadAddress (process->GetTarget(), 0, true, 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::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 this is a kext, and 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());
}
if (m_uuid.IsValid())
{
Module* exe_module = process->GetTarget().GetExecutableModulePointer();
if (exe_module && exe_module->GetUUID().IsValid())
{
if (m_uuid != exe_module->GetUUID())
{
Stream *s = process->GetTarget().GetDebugger().GetOutputFile().get();
if (s)
{
s->Printf ("warning: Host-side kernel file has Mach-O UUID of %s but remote kernel has a UUID of %s -- a mismatched kernel file will result in a poor debugger experience.\n",
exe_module->GetUUID().GetAsString().c_str(),
m_uuid.GetAsString().c_str());
s->Flush ();
}
}
}
}
}
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;
Target &target = process->GetTarget();
// 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;
}
bool uuid_is_valid = m_uuid.IsValid();
if (IsKernel() && uuid_is_valid && m_memory_module_sp.get())
{
Stream *s = target.GetDebugger().GetOutputFile().get();
if (s)
{
s->Printf ("Kernel UUID: %s\n", m_memory_module_sp->GetUUID().GetAsString().c_str());
s->Printf ("Load Address: 0x%" PRIx64 "\n", m_load_address);
}
}
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();
m_module_sp = target_images.FindModule(m_uuid);
// Search for the kext on the local filesystem via the UUID
if (!m_module_sp && uuid_is_valid)
{
ModuleSpec module_spec;
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 to do anything useful.
// This will force a clal to
if (IsKernel())
{
if (Symbols::DownloadObjectAndSymbolFile (module_spec, true))
{
if (module_spec.GetFileSpec().Exists())
{
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 (m_module_sp);
target.ModulesDidLoad (loaded_module_list);
}
}
}
}
// If the current platform is PlatformDarwinKernel, create a ModuleSpec with the filename set
// to be the bundle ID for this kext, e.g. "com.apple.filesystems.msdosfs", and ask the platform
// to find it.
PlatformSP platform_sp (target.GetPlatform());
if (!m_module_sp && platform_sp)
{
ConstString platform_name (platform_sp->GetPluginName());
static ConstString g_platform_name (PlatformDarwinKernel::GetPluginNameStatic());
if (platform_name == g_platform_name)
{
ModuleSpec kext_bundle_module_spec(module_spec);
FileSpec kext_filespec(m_name.c_str(), false);
kext_bundle_module_spec.GetFileSpec() = kext_filespec;
platform_sp->GetSharedModule (kext_bundle_module_spec, m_module_sp, &target.GetExecutableSearchPaths(), NULL, NULL);
}
}
// 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 (!m_module_sp)
{
m_module_sp = target.GetSharedModule (module_spec);
}
if (IsKernel() && !m_module_sp)
{
Stream *s = target.GetDebugger().GetOutputFile().get();
if (s)
{
s->Printf ("WARNING: Unable to locate kernel binary on the debugger system.\n");
}
}
}
// 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)
{
bool uuid_match_ok = true;
if (m_memory_module_sp)
{
if (m_module_sp->GetUUID() != m_memory_module_sp->GetUUID())
{
uuid_match_ok = false;
}
}
if (uuid_match_ok)
{
target.GetImages().AppendIfNeeded(m_module_sp);
if (IsKernel() && target.GetExecutableModulePointer() != m_module_sp.get())
{
target.SetExecutableModule (m_module_sp, false);
}
}
}
}
if (!m_module_sp && !IsKernel() && m_uuid.IsValid() && !m_name.empty())
{
Stream *s = target.GetDebugger().GetOutputFile().get();
if (s)
{
s->Printf ("warning: Can't find binary/dSYM for %s (%s)\n",
m_name.c_str(), m_uuid.GetAsString().c_str());
}
}
static ConstString g_section_name_LINKEDIT ("__LINKEDIT");
if (m_memory_module_sp && m_module_sp)
{
if (m_module_sp->GetUUID() == m_memory_module_sp->GetUUID())
{
ObjectFile *ondisk_object_file = m_module_sp->GetObjectFile();
ObjectFile *memory_object_file = m_memory_module_sp->GetObjectFile();
if (memory_object_file && ondisk_object_file)
{
// 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 ();
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;
// Use the memory_module's addresses for each section to set the
// file module's load address as appropriate. We don't want to use
// a single slide value for the entire kext - different segments may
// be slid different amounts by the kext loader.
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)
{
// Don't ever load __LINKEDIT as it may or may not be actually
// mapped into memory and there is no current way to tell.
// I filed rdar://problem/12851706 to track being able to tell
// if the __LINKEDIT is actually mapped, but until then, we need
// to not load the __LINKEDIT
if (ignore_linkedit && ondisk_section_sp->GetName() == g_section_name_LINKEDIT)
continue;
const Section *memory_section = memory_section_list->FindSectionByName(ondisk_section_sp->GetName()).get();
if (memory_section)
{
target.SetSectionLoadAddress (ondisk_section_sp, memory_section->GetFileAddress());
++num_sections_loaded;
}
}
}
if (num_sections_loaded > 0)
m_load_process_stop_id = process->GetStopID();
else
m_module_sp.reset(); // No sections were loaded
}
else
m_module_sp.reset(); // One or both section lists
}
else
m_module_sp.reset(); // One or both object files missing
}
else
m_module_sp.reset(); // UUID mismatch
}
bool is_loaded = IsLoaded();
if (is_loaded && m_module_sp && IsKernel())
{
Stream *s = target.GetDebugger().GetOutputFile().get();
if (s)
{
ObjectFile *kernel_object_file = m_module_sp->GetObjectFile();
if (kernel_object_file)
{
addr_t file_address = kernel_object_file->GetHeaderAddress().GetFileAddress();
if (m_load_address != LLDB_INVALID_ADDRESS && file_address != LLDB_INVALID_ADDRESS)
{
s->Printf ("Kernel slid 0x%" PRIx64 " in memory.\n", m_load_address - file_address);
}
}
{
s->Printf ("Loaded kernel file %s\n",
m_module_sp->GetFileSpec().GetPath().c_str());
}
s->Flush ();
}
}
return is_loaded;
}
uint32_t
DynamicLoaderDarwinKernel::KextImageInfo::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::KextImageInfo::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::KextImageInfo::GetArchitecture () const
{
if (m_memory_module_sp)
return m_memory_module_sp->GetArchitecture();
if (m_module_sp)
return m_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();
m_kernel.SetModule (m_process->GetTarget().GetExecutableModule());
m_kernel.SetIsKernel(true);
ConstString kernel_name("mach_kernel");
if (m_kernel.GetModule().get()
&& m_kernel.GetModule()->GetObjectFile()
&& !m_kernel.GetModule()->GetObjectFile()->GetFileSpec().GetFilename().IsEmpty())
{
kernel_name = m_kernel.GetModule()->GetObjectFile()->GetFileSpec().GetFilename();
}
m_kernel.SetName (kernel_name.AsCString());
if (m_kernel.GetLoadAddress() == LLDB_INVALID_ADDRESS)
{
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.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.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.SetProcessStopId (m_process->GetStopID());
}
}
else
{
m_kernel.SetLoadAddress(file_address);
}
}
}
}
if (m_kernel.GetLoadAddress() != LLDB_INVALID_ADDRESS)
{
if (!m_kernel.LoadImageUsingMemoryModule (m_process))
{
m_kernel.LoadImageAtFileAddress (m_process);
}
}
if (m_kernel.IsLoaded() && m_kernel.GetModule())
{
static ConstString kext_summary_symbol ("gLoadedKextSummaries");
const Symbol *symbol = m_kernel.GetModule()->FindFirstSymbolWithNameAndType (kext_summary_symbol, eSymbolTypeData);
if (symbol)
{
m_kext_summary_header_ptr_addr = symbol->GetAddress();
// Update all image infos
ReadAllKextSummaries ();
}
}
else
{
m_kernel.Clear();
}
}
}
//----------------------------------------------------------------------
// 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)
{
Log *log(GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER));
if (log)
log->Printf ("DynamicLoaderDarwinKernel::BreakpointHit (...)\n");
ReadAllKextSummaries ();
if (log)
PutToLog(log);
return GetStopWhenImagesChange();
}
bool
DynamicLoaderDarwinKernel::ReadKextSummaryHeader ()
{
Mutex::Locker locker(m_mutex);
// the all image infos is already valid for this process stop ID
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 currently 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)
{
lldb::offset_t offset = 0;
m_kext_summary_header.version = data.GetU32(&offset);
if (m_kext_summary_header.version > 128)
{
Stream *s = m_process->GetTarget().GetDebugger().GetOutputFile().get();
s->Printf ("WARNING: Unable to read kext summary header, got improbable version number %u\n", m_kext_summary_header.version);
// If we get an improbably large version number, we're probably getting bad memory.
m_kext_summary_header_addr.Clear();
return false;
}
if (m_kext_summary_header.version >= 2)
{
m_kext_summary_header.entry_size = data.GetU32(&offset);
if (m_kext_summary_header.entry_size > 4096)
{
// If we get an improbably large entry_size, we're probably getting bad memory.
Stream *s = m_process->GetTarget().GetDebugger().GetOutputFile().get();
s->Printf ("WARNING: Unable to read kext summary header, got improbable entry_size %u\n", m_kext_summary_header.entry_size);
m_kext_summary_header_addr.Clear();
return false;
}
}
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);
if (m_kext_summary_header.entry_count > 10000)
{
// If we get an improbably large number of kexts, we're probably getting bad memory.
Stream *s = m_process->GetTarget().GetDebugger().GetOutputFile().get();
s->Printf ("WARNING: Unable to read kext summary header, got improbable number of kexts %u\n", m_kext_summary_header.entry_count);
m_kext_summary_header_addr.Clear();
return false;
}
return true;
}
}
}
}
m_kext_summary_header_addr.Clear();
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)
{
KextImageInfo::collection kext_summaries;
Log *log(GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER));
if (log)
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;
// read the plugin.dynamic-loader.darwin-kernel.load-kexts setting -- if the user requested no
// kext loading, don't print any messages about kexts & don't try to read them.
const bool load_kexts = GetGlobalProperties()->GetLoadKexts();
// 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().GetOutputFile().get();
if (s && load_kexts)
{
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)
{
if (load_kexts)
{
log->Printf ("DynamicLoaderDarwinKernel::ParseKextSummaries: %d kexts added, %d kexts removed", number_of_new_kexts_being_added, number_of_old_kexts_being_removed);
}
else
{
log->Printf ("DynamicLoaderDarwinKernel::ParseKextSummaries kext loading is disabled, else would have %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 (load_kexts)
{
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 && load_kexts)
s->Printf (".");
if (log)
kext_summaries[new_kext].PutToLog (log);
}
}
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, false);
}
}
if (s && load_kexts)
{
s->Printf (" done.\n");
s->Flush ();
}
return true;
}
uint32_t
DynamicLoaderDarwinKernel::ReadKextSummaries (const Address &kext_summary_addr,
uint32_t image_infos_count,
KextImageInfo::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;
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)
{
lldb::offset_t offset = kext_summary_offset;
const void *name_data = extractor.GetData(&offset, KERNEL_MODULE_MAX_NAME);
if (name_data == NULL)
break;
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);
}
else
{
image_infos.clear();
}
return image_infos.size();
}
bool
DynamicLoaderDarwinKernel::ReadAllKextSummaries ()
{
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_known_kexts.clear();
}
return true;
}
}
return false;
}
//----------------------------------------------------------------------
// Dump an image info structure to the file handle provided.
//----------------------------------------------------------------------
void
DynamicLoaderDarwinKernel::KextImageInfo::PutToLog (Log *log) const
{
if (log == NULL)
return;
const uint8_t *u = (uint8_t *) m_uuid.GetBytes();
if (m_load_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],
m_name.c_str());
}
else
log->Printf("\tname=\"%s\" (UNLOADED)", m_name.c_str());
}
else
{
if (u)
{
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],
m_name.c_str());
}
else
{
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());
}
}
}
//----------------------------------------------------------------------
// 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%16.16" PRIx64 " { 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_known_kexts.size();
if (count > 0)
{
log->PutCString("Loaded:");
for (i = 0; i<count; i++)
m_known_kexts[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;
}
void
DynamicLoaderDarwinKernel::SetNotificationBreakpointIfNeeded ()
{
if (m_break_id == LLDB_INVALID_BREAK_ID && m_kernel.GetModule())
{
DEBUG_PRINTF("DynamicLoaderDarwinKernel::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState()));
const bool internal_bp = true;
const bool hardware = false;
const LazyBool skip_prologue = eLazyBoolNo;
FileSpecList module_spec_list;
module_spec_list.Append (m_kernel.GetModule()->GetFileSpec());
Breakpoint *bp = m_process->GetTarget().CreateBreakpoint (&module_spec_list,
NULL,
"OSKextLoadedKextSummariesUpdated",
eFunctionNameTypeFull,
skip_prologue,
internal_bp,
hardware).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;
}
}
ThreadPlanSP
DynamicLoaderDarwinKernel::GetStepThroughTrampolinePlan (Thread &thread, bool stop_others)
{
ThreadPlanSP thread_plan_sp;
Log *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,
DebuggerInitialize);
}
void
DynamicLoaderDarwinKernel::Terminate()
{
PluginManager::UnregisterPlugin (CreateInstance);
}
void
DynamicLoaderDarwinKernel::DebuggerInitialize (lldb_private::Debugger &debugger)
{
if (!PluginManager::GetSettingForDynamicLoaderPlugin (debugger, DynamicLoaderDarwinKernelProperties::GetSettingName()))
{
const bool is_global_setting = true;
PluginManager::CreateSettingForDynamicLoaderPlugin (debugger,
GetGlobalProperties()->GetValueProperties(),
ConstString ("Properties for the DynamicLoaderDarwinKernel plug-in."),
is_global_setting);
}
}
lldb_private::ConstString
DynamicLoaderDarwinKernel::GetPluginNameStatic()
{
static ConstString g_name("darwin-kernel");
return g_name;
}
const char *
DynamicLoaderDarwinKernel::GetPluginDescriptionStatic()
{
return "Dynamic loader plug-in that watches for shared library loads/unloads in the MacOSX kernel.";
}
//------------------------------------------------------------------
// PluginInterface protocol
//------------------------------------------------------------------
lldb_private::ConstString
DynamicLoaderDarwinKernel::GetPluginName()
{
return GetPluginNameStatic();
}
uint32_t
DynamicLoaderDarwinKernel::GetPluginVersion()
{
return 1;
}
lldb::ByteOrder
DynamicLoaderDarwinKernel::GetByteOrderFromMagic (uint32_t magic)
{
switch (magic)
{
case llvm::MachO::MH_MAGIC:
case llvm::MachO::MH_MAGIC_64:
return lldb::endian::InlHostByteOrder();
case llvm::MachO::MH_CIGAM:
case llvm::MachO::MH_CIGAM_64:
if (lldb::endian::InlHostByteOrder() == lldb::eByteOrderBig)
return lldb::eByteOrderLittle;
else
return lldb::eByteOrderBig;
default:
break;
}
return lldb::eByteOrderInvalid;
}
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