57e1201e31
Also, add an async error message if the dyld solib loaded callback function can't find an ABI (which results in no solibs being loaded in the process). This is a big error and we should call attention to it. <rdar://problem/23471384> llvm-svn: 252581
2076 lines
84 KiB
C++
2076 lines
84 KiB
C++
//===-- DynamicLoaderMacOSXDYLD.cpp -----------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Breakpoint/StoppointCallbackContext.h"
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#include "lldb/Core/DataBuffer.h"
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#include "lldb/Core/DataBufferHeap.h"
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#include "lldb/Core/Debugger.h"
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#include "lldb/Core/Log.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Core/ModuleSpec.h"
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#include "lldb/Core/PluginManager.h"
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#include "lldb/Core/Section.h"
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#include "lldb/Core/State.h"
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#include "lldb/Symbol/ClangASTContext.h"
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#include "lldb/Symbol/Function.h"
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#include "lldb/Symbol/ObjectFile.h"
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#include "lldb/Target/ObjCLanguageRuntime.h"
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#include "lldb/Target/ABI.h"
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#include "lldb/Target/RegisterContext.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Target/Thread.h"
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#include "lldb/Target/ThreadPlanRunToAddress.h"
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#include "lldb/Target/StackFrame.h"
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#include "DynamicLoaderMacOSXDYLD.h"
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//#define ENABLE_DEBUG_PRINTF // COMMENT THIS LINE OUT PRIOR TO CHECKIN
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#ifdef ENABLE_DEBUG_PRINTF
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#include <stdio.h>
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#define DEBUG_PRINTF(fmt, ...) printf(fmt, ## __VA_ARGS__)
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#else
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#define DEBUG_PRINTF(fmt, ...)
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#endif
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#ifndef __APPLE__
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#include "Utility/UuidCompatibility.h"
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#else
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#include <uuid/uuid.h>
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#endif
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using namespace lldb;
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using namespace lldb_private;
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/// FIXME - The ObjC Runtime trampoline handler doesn't really belong here.
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/// I am putting it here so I can invoke it in the Trampoline code here, but
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/// it should be moved to the ObjC Runtime support when it is set up.
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DynamicLoaderMacOSXDYLD::DYLDImageInfo *
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DynamicLoaderMacOSXDYLD::GetImageInfo (Module *module)
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{
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const UUID &module_uuid = module->GetUUID();
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DYLDImageInfo::collection::iterator pos, end = m_dyld_image_infos.end();
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// First try just by UUID as it is the safest.
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if (module_uuid.IsValid())
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{
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for (pos = m_dyld_image_infos.begin(); pos != end; ++pos)
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{
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if (pos->uuid == module_uuid)
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return &(*pos);
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}
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if (m_dyld.uuid == module_uuid)
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return &m_dyld;
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}
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// Next try by platform path only for things that don't have a valid UUID
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// since if a file has a valid UUID in real life it should also in the
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// dyld info. This is the next safest because the paths in the dyld info
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// are platform paths, not local paths. For local debugging platform == local
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// paths.
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const FileSpec &platform_file_spec = module->GetPlatformFileSpec();
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for (pos = m_dyld_image_infos.begin(); pos != end; ++pos)
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{
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if (pos->file_spec == platform_file_spec && pos->uuid.IsValid() == false)
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return &(*pos);
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}
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if (m_dyld.file_spec == platform_file_spec && m_dyld.uuid.IsValid() == false)
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return &m_dyld;
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return NULL;
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}
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//----------------------------------------------------------------------
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// Create an instance of this class. This function is filled into
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// the plugin info class that gets handed out by the plugin factory and
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// allows the lldb to instantiate an instance of this class.
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//----------------------------------------------------------------------
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DynamicLoader *
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DynamicLoaderMacOSXDYLD::CreateInstance (Process* process, bool force)
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{
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bool create = force;
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if (!create)
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{
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create = true;
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Module* exe_module = process->GetTarget().GetExecutableModulePointer();
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if (exe_module)
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{
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ObjectFile *object_file = exe_module->GetObjectFile();
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if (object_file)
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{
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create = (object_file->GetStrata() == ObjectFile::eStrataUser);
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}
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}
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if (create)
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{
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const llvm::Triple &triple_ref = process->GetTarget().GetArchitecture().GetTriple();
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switch (triple_ref.getOS())
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{
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case llvm::Triple::Darwin:
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case llvm::Triple::MacOSX:
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case llvm::Triple::IOS:
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case llvm::Triple::TvOS:
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case llvm::Triple::WatchOS:
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create = triple_ref.getVendor() == llvm::Triple::Apple;
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break;
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default:
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create = false;
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break;
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}
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}
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}
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if (create)
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return new DynamicLoaderMacOSXDYLD (process);
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return NULL;
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}
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//----------------------------------------------------------------------
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// Constructor
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//----------------------------------------------------------------------
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DynamicLoaderMacOSXDYLD::DynamicLoaderMacOSXDYLD (Process* process) :
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DynamicLoader(process),
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m_dyld(),
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m_dyld_module_wp(),
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m_dyld_all_image_infos_addr(LLDB_INVALID_ADDRESS),
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m_dyld_all_image_infos(),
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m_dyld_all_image_infos_stop_id (UINT32_MAX),
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m_break_id(LLDB_INVALID_BREAK_ID),
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m_dyld_image_infos(),
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m_dyld_image_infos_stop_id (UINT32_MAX),
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m_mutex(Mutex::eMutexTypeRecursive),
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m_process_image_addr_is_all_images_infos (false)
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{
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}
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//----------------------------------------------------------------------
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// Destructor
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//----------------------------------------------------------------------
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DynamicLoaderMacOSXDYLD::~DynamicLoaderMacOSXDYLD()
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{
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Clear(true);
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}
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//------------------------------------------------------------------
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/// Called after attaching a process.
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///
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/// Allow DynamicLoader plug-ins to execute some code after
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/// attaching to a process.
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//------------------------------------------------------------------
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void
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DynamicLoaderMacOSXDYLD::DidAttach ()
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{
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PrivateInitialize(m_process);
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LocateDYLD ();
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SetNotificationBreakpoint ();
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}
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//------------------------------------------------------------------
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/// Called after attaching a process.
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///
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/// Allow DynamicLoader plug-ins to execute some code after
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/// attaching to a process.
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//------------------------------------------------------------------
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void
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DynamicLoaderMacOSXDYLD::DidLaunch ()
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{
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PrivateInitialize(m_process);
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LocateDYLD ();
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SetNotificationBreakpoint ();
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}
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bool
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DynamicLoaderMacOSXDYLD::ProcessDidExec ()
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{
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if (m_process)
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{
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// If we are stopped after an exec, we will have only one thread...
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if (m_process->GetThreadList().GetSize() == 1)
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{
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// We know if a process has exec'ed if our "m_dyld_all_image_infos_addr"
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// value differs from the Process' image info address. When a process
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// execs itself it might cause a change if ASLR is enabled.
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const addr_t shlib_addr = m_process->GetImageInfoAddress ();
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if (m_process_image_addr_is_all_images_infos == true && shlib_addr != m_dyld_all_image_infos_addr)
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{
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// The image info address from the process is the 'dyld_all_image_infos'
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// address and it has changed.
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return true;
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}
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if (m_process_image_addr_is_all_images_infos == false && shlib_addr == m_dyld.address)
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{
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// The image info address from the process is the mach_header
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// address for dyld and it has changed.
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return true;
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}
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// ASLR might be disabled and dyld could have ended up in the same
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// location. We should try and detect if we are stopped at '_dyld_start'
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ThreadSP thread_sp (m_process->GetThreadList().GetThreadAtIndex(0));
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if (thread_sp)
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{
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lldb::StackFrameSP frame_sp (thread_sp->GetStackFrameAtIndex(0));
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if (frame_sp)
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{
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const Symbol *symbol = frame_sp->GetSymbolContext(eSymbolContextSymbol).symbol;
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if (symbol)
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{
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if (symbol->GetName() == ConstString("_dyld_start"))
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return true;
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}
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}
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}
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}
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}
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return false;
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}
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//----------------------------------------------------------------------
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// Clear out the state of this class.
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//----------------------------------------------------------------------
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void
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DynamicLoaderMacOSXDYLD::Clear (bool clear_process)
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{
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Mutex::Locker locker(m_mutex);
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if (LLDB_BREAK_ID_IS_VALID(m_break_id))
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m_process->GetTarget().RemoveBreakpointByID (m_break_id);
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if (clear_process)
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m_process = NULL;
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m_dyld.Clear(false);
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m_dyld_all_image_infos_addr = LLDB_INVALID_ADDRESS;
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m_dyld_all_image_infos.Clear();
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m_break_id = LLDB_INVALID_BREAK_ID;
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m_dyld_image_infos.clear();
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}
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//----------------------------------------------------------------------
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// Check if we have found DYLD yet
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//----------------------------------------------------------------------
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bool
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DynamicLoaderMacOSXDYLD::DidSetNotificationBreakpoint() const
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{
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return LLDB_BREAK_ID_IS_VALID (m_break_id);
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}
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//----------------------------------------------------------------------
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// Try and figure out where dyld is by first asking the Process
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// if it knows (which currently calls down in the lldb::Process
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// to get the DYLD info (available on SnowLeopard only). If that fails,
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// then check in the default addresses.
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//----------------------------------------------------------------------
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bool
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DynamicLoaderMacOSXDYLD::LocateDYLD()
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{
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if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS)
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{
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// Check the image info addr as it might point to the
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// mach header for dyld, or it might point to the
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// dyld_all_image_infos struct
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const addr_t shlib_addr = m_process->GetImageInfoAddress ();
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if (shlib_addr != LLDB_INVALID_ADDRESS)
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{
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ByteOrder byte_order = m_process->GetTarget().GetArchitecture().GetByteOrder();
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uint8_t buf[4];
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DataExtractor data (buf, sizeof(buf), byte_order, 4);
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Error error;
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if (m_process->ReadMemory (shlib_addr, buf, 4, error) == 4)
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{
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lldb::offset_t offset = 0;
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uint32_t magic = data.GetU32 (&offset);
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switch (magic)
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{
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case llvm::MachO::MH_MAGIC:
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case llvm::MachO::MH_MAGIC_64:
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case llvm::MachO::MH_CIGAM:
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case llvm::MachO::MH_CIGAM_64:
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m_process_image_addr_is_all_images_infos = false;
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return ReadDYLDInfoFromMemoryAndSetNotificationCallback(shlib_addr);
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default:
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break;
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}
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}
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// Maybe it points to the all image infos?
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m_dyld_all_image_infos_addr = shlib_addr;
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m_process_image_addr_is_all_images_infos = true;
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}
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}
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if (m_dyld_all_image_infos_addr != LLDB_INVALID_ADDRESS)
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{
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if (ReadAllImageInfosStructure ())
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{
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if (m_dyld_all_image_infos.dyldImageLoadAddress != LLDB_INVALID_ADDRESS)
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return ReadDYLDInfoFromMemoryAndSetNotificationCallback (m_dyld_all_image_infos.dyldImageLoadAddress);
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else
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return ReadDYLDInfoFromMemoryAndSetNotificationCallback (m_dyld_all_image_infos_addr & 0xfffffffffff00000ull);
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}
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}
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// Check some default values
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Module *executable = m_process->GetTarget().GetExecutableModulePointer();
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if (executable)
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{
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const ArchSpec &exe_arch = executable->GetArchitecture();
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if (exe_arch.GetAddressByteSize() == 8)
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{
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return ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x7fff5fc00000ull);
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}
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else if (exe_arch.GetMachine() == llvm::Triple::arm || exe_arch.GetMachine() == llvm::Triple::thumb || exe_arch.GetMachine() == llvm::Triple::aarch64)
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{
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return ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x2fe00000);
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}
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else
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{
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return ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x8fe00000);
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}
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}
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return false;
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}
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ModuleSP
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DynamicLoaderMacOSXDYLD::FindTargetModuleForDYLDImageInfo (DYLDImageInfo &image_info, bool can_create, bool *did_create_ptr)
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{
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if (did_create_ptr)
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*did_create_ptr = false;
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Target &target = m_process->GetTarget();
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const ModuleList &target_images = target.GetImages();
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ModuleSpec module_spec (image_info.file_spec);
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module_spec.GetUUID() = image_info.uuid;
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ModuleSP module_sp (target_images.FindFirstModule (module_spec));
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if (module_sp && !module_spec.GetUUID().IsValid() && !module_sp->GetUUID().IsValid())
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{
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// No UUID, we must rely upon the cached module modification
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// time and the modification time of the file on disk
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if (module_sp->GetModificationTime() != module_sp->GetFileSpec().GetModificationTime())
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module_sp.reset();
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}
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if (!module_sp)
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{
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if (can_create)
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{
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module_sp = target.GetSharedModule (module_spec);
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if (!module_sp || module_sp->GetObjectFile() == NULL)
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module_sp = m_process->ReadModuleFromMemory (image_info.file_spec, image_info.address);
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if (did_create_ptr)
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*did_create_ptr = (bool) module_sp;
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}
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}
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return module_sp;
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}
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//----------------------------------------------------------------------
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// Assume that dyld is in memory at ADDR and try to parse it's load
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// commands
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//----------------------------------------------------------------------
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bool
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DynamicLoaderMacOSXDYLD::ReadDYLDInfoFromMemoryAndSetNotificationCallback(lldb::addr_t addr)
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{
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DataExtractor data; // Load command data
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if (ReadMachHeader (addr, &m_dyld.header, &data))
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{
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if (m_dyld.header.filetype == llvm::MachO::MH_DYLINKER)
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{
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m_dyld.address = addr;
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ModuleSP dyld_module_sp;
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if (ParseLoadCommands (data, m_dyld, &m_dyld.file_spec))
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{
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if (m_dyld.file_spec)
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{
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dyld_module_sp = FindTargetModuleForDYLDImageInfo (m_dyld, true, NULL);
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if (dyld_module_sp)
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UpdateImageLoadAddress (dyld_module_sp.get(), m_dyld);
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}
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}
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Target &target = m_process->GetTarget();
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if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS && dyld_module_sp.get())
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{
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static ConstString g_dyld_all_image_infos ("dyld_all_image_infos");
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const Symbol *symbol = dyld_module_sp->FindFirstSymbolWithNameAndType (g_dyld_all_image_infos, eSymbolTypeData);
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if (symbol)
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m_dyld_all_image_infos_addr = symbol->GetLoadAddress(&target);
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}
|
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|
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// Update all image infos
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InitializeFromAllImageInfos ();
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|
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// If we didn't have an executable before, but now we do, then the
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// dyld module shared pointer might be unique and we may need to add
|
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// it again (since Target::SetExecutableModule() will clear the
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// images). So append the dyld module back to the list if it is
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/// unique!
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if (dyld_module_sp)
|
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{
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target.GetImages().AppendIfNeeded (dyld_module_sp);
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|
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// At this point we should have read in dyld's module, and so we should set breakpoints in it:
|
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ModuleList modules;
|
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modules.Append(dyld_module_sp);
|
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target.ModulesDidLoad(modules);
|
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m_dyld_module_wp = dyld_module_sp;
|
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}
|
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return true;
|
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}
|
|
}
|
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return false;
|
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}
|
|
|
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bool
|
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DynamicLoaderMacOSXDYLD::NeedToLocateDYLD () const
|
|
{
|
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return m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
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// Update the load addresses for all segments in MODULE using the
|
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// updated INFO that is passed in.
|
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//----------------------------------------------------------------------
|
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bool
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DynamicLoaderMacOSXDYLD::UpdateImageLoadAddress (Module *module, DYLDImageInfo& info)
|
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{
|
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bool changed = false;
|
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if (module)
|
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{
|
|
ObjectFile *image_object_file = module->GetObjectFile();
|
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if (image_object_file)
|
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{
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SectionList *section_list = image_object_file->GetSectionList ();
|
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if (section_list)
|
|
{
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|
std::vector<uint32_t> inaccessible_segment_indexes;
|
|
// We now know the slide amount, so go through all sections
|
|
// and update the load addresses with the correct values.
|
|
const size_t num_segments = info.segments.size();
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for (size_t i=0; i<num_segments; ++i)
|
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{
|
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// Only load a segment if it has protections. Things like
|
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// __PAGEZERO don't have any protections, and they shouldn't
|
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// be slid
|
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SectionSP section_sp(section_list->FindSectionByName(info.segments[i].name));
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|
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if (info.segments[i].maxprot == 0)
|
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{
|
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inaccessible_segment_indexes.push_back(i);
|
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}
|
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else
|
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{
|
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const addr_t new_section_load_addr = info.segments[i].vmaddr + info.slide;
|
|
static ConstString g_section_name_LINKEDIT ("__LINKEDIT");
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|
|
if (section_sp)
|
|
{
|
|
// __LINKEDIT sections from files in the shared cache
|
|
// can overlap so check to see what the segment name is
|
|
// and pass "false" so we don't warn of overlapping
|
|
// "Section" objects, and "true" for all other sections.
|
|
const bool warn_multiple = section_sp->GetName() != g_section_name_LINKEDIT;
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|
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changed = m_process->GetTarget().SetSectionLoadAddress (section_sp, new_section_load_addr, warn_multiple);
|
|
}
|
|
else
|
|
{
|
|
Host::SystemLog (Host::eSystemLogWarning,
|
|
"warning: unable to find and load segment named '%s' at 0x%" PRIx64 " in '%s' in macosx dynamic loader plug-in.\n",
|
|
info.segments[i].name.AsCString("<invalid>"),
|
|
(uint64_t)new_section_load_addr,
|
|
image_object_file->GetFileSpec().GetPath().c_str());
|
|
}
|
|
}
|
|
}
|
|
|
|
// If the loaded the file (it changed) and we have segments that
|
|
// are not readable or writeable, add them to the invalid memory
|
|
// region cache for the process. This will typically only be
|
|
// the __PAGEZERO segment in the main executable. We might be able
|
|
// to apply this more generally to more sections that have no
|
|
// protections in the future, but for now we are going to just
|
|
// do __PAGEZERO.
|
|
if (changed && !inaccessible_segment_indexes.empty())
|
|
{
|
|
for (uint32_t i=0; i<inaccessible_segment_indexes.size(); ++i)
|
|
{
|
|
const uint32_t seg_idx = inaccessible_segment_indexes[i];
|
|
SectionSP section_sp(section_list->FindSectionByName(info.segments[seg_idx].name));
|
|
|
|
if (section_sp)
|
|
{
|
|
static ConstString g_pagezero_section_name("__PAGEZERO");
|
|
if (g_pagezero_section_name == section_sp->GetName())
|
|
{
|
|
// __PAGEZERO never slides...
|
|
const lldb::addr_t vmaddr = info.segments[seg_idx].vmaddr;
|
|
const lldb::addr_t vmsize = info.segments[seg_idx].vmsize;
|
|
Process::LoadRange pagezero_range (vmaddr, vmsize);
|
|
m_process->AddInvalidMemoryRegion(pagezero_range);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// We might have an in memory image that was loaded as soon as it was created
|
|
if (info.load_stop_id == m_process->GetStopID())
|
|
changed = true;
|
|
else if (changed)
|
|
{
|
|
// Update the stop ID when this library was updated
|
|
info.load_stop_id = m_process->GetStopID();
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Update the load addresses for all segments in MODULE using the
|
|
// updated INFO that is passed in.
|
|
//----------------------------------------------------------------------
|
|
bool
|
|
DynamicLoaderMacOSXDYLD::UnloadImageLoadAddress (Module *module, DYLDImageInfo& info)
|
|
{
|
|
bool changed = false;
|
|
if (module)
|
|
{
|
|
ObjectFile *image_object_file = module->GetObjectFile();
|
|
if (image_object_file)
|
|
{
|
|
SectionList *section_list = image_object_file->GetSectionList ();
|
|
if (section_list)
|
|
{
|
|
const size_t num_segments = info.segments.size();
|
|
for (size_t i=0; i<num_segments; ++i)
|
|
{
|
|
SectionSP section_sp(section_list->FindSectionByName(info.segments[i].name));
|
|
if (section_sp)
|
|
{
|
|
const addr_t old_section_load_addr = info.segments[i].vmaddr + info.slide;
|
|
if (m_process->GetTarget().SetSectionUnloaded (section_sp, old_section_load_addr))
|
|
changed = true;
|
|
}
|
|
else
|
|
{
|
|
Host::SystemLog (Host::eSystemLogWarning,
|
|
"warning: unable to find and unload segment named '%s' in '%s' in macosx dynamic loader plug-in.\n",
|
|
info.segments[i].name.AsCString("<invalid>"),
|
|
image_object_file->GetFileSpec().GetPath().c_str());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
|
|
//----------------------------------------------------------------------
|
|
// 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
|
|
DynamicLoaderMacOSXDYLD::NotifyBreakpointHit (void *baton,
|
|
StoppointCallbackContext *context,
|
|
lldb::user_id_t break_id,
|
|
lldb::user_id_t break_loc_id)
|
|
{
|
|
// Let the event know that the images have changed
|
|
// DYLD passes three arguments to the notification breakpoint.
|
|
// Arg1: enum dyld_image_mode mode - 0 = adding, 1 = removing
|
|
// Arg2: uint32_t infoCount - Number of shared libraries added
|
|
// Arg3: dyld_image_info info[] - Array of structs of the form:
|
|
// const struct mach_header *imageLoadAddress
|
|
// const char *imageFilePath
|
|
// uintptr_t imageFileModDate (a time_t)
|
|
|
|
DynamicLoaderMacOSXDYLD* dyld_instance = (DynamicLoaderMacOSXDYLD*) baton;
|
|
|
|
// First step is to see if we've already initialized the all image infos. If we haven't then this function
|
|
// will do so and return true. In the course of initializing the all_image_infos it will read the complete
|
|
// current state, so we don't need to figure out what has changed from the data passed in to us.
|
|
|
|
ExecutionContext exe_ctx (context->exe_ctx_ref);
|
|
Process *process = exe_ctx.GetProcessPtr();
|
|
|
|
// This is a sanity check just in case this dyld_instance is an old dyld plugin's breakpoint still lying around.
|
|
if (process != dyld_instance->m_process)
|
|
return false;
|
|
|
|
if (dyld_instance->InitializeFromAllImageInfos())
|
|
return dyld_instance->GetStopWhenImagesChange();
|
|
|
|
const lldb::ABISP &abi = process->GetABI();
|
|
if (abi)
|
|
{
|
|
// Build up the value array to store the three arguments given above, then get the values from the ABI:
|
|
|
|
ClangASTContext *clang_ast_context = process->GetTarget().GetScratchClangASTContext();
|
|
ValueList argument_values;
|
|
Value input_value;
|
|
|
|
CompilerType clang_void_ptr_type = clang_ast_context->GetBasicType(eBasicTypeVoid).GetPointerType();
|
|
CompilerType clang_uint32_type = clang_ast_context->GetBuiltinTypeForEncodingAndBitSize(lldb::eEncodingUint, 32);
|
|
input_value.SetValueType (Value::eValueTypeScalar);
|
|
input_value.SetCompilerType (clang_uint32_type);
|
|
// input_value.SetContext (Value::eContextTypeClangType, clang_uint32_type);
|
|
argument_values.PushValue (input_value);
|
|
argument_values.PushValue (input_value);
|
|
input_value.SetCompilerType (clang_void_ptr_type);
|
|
// input_value.SetContext (Value::eContextTypeClangType, clang_void_ptr_type);
|
|
argument_values.PushValue (input_value);
|
|
|
|
if (abi->GetArgumentValues (exe_ctx.GetThreadRef(), argument_values))
|
|
{
|
|
uint32_t dyld_mode = argument_values.GetValueAtIndex(0)->GetScalar().UInt (-1);
|
|
if (dyld_mode != static_cast<uint32_t>(-1))
|
|
{
|
|
// Okay the mode was right, now get the number of elements, and the array of new elements...
|
|
uint32_t image_infos_count = argument_values.GetValueAtIndex(1)->GetScalar().UInt (-1);
|
|
if (image_infos_count != static_cast<uint32_t>(-1))
|
|
{
|
|
// Got the number added, now go through the array of added elements, putting out the mach header
|
|
// address, and adding the image.
|
|
// Note, I'm not putting in logging here, since the AddModules & RemoveModules functions do
|
|
// all the logging internally.
|
|
|
|
lldb::addr_t image_infos_addr = argument_values.GetValueAtIndex(2)->GetScalar().ULongLong();
|
|
if (dyld_mode == 0)
|
|
{
|
|
// This is add:
|
|
dyld_instance->AddModulesUsingImageInfosAddress (image_infos_addr, image_infos_count);
|
|
}
|
|
else
|
|
{
|
|
// This is remove:
|
|
dyld_instance->RemoveModulesUsingImageInfosAddress (image_infos_addr, image_infos_count);
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
process->GetTarget().GetDebugger().GetAsyncErrorStream()->Printf("No ABI plugin located for triple %s -- shared libraries will not be registered!\n", process->GetTarget().GetArchitecture().GetTriple().getTriple().c_str());
|
|
}
|
|
|
|
// Return true to stop the target, false to just let the target run
|
|
return dyld_instance->GetStopWhenImagesChange();
|
|
}
|
|
|
|
bool
|
|
DynamicLoaderMacOSXDYLD::ReadAllImageInfosStructure ()
|
|
{
|
|
Mutex::Locker locker(m_mutex);
|
|
|
|
// the all image infos is already valid for this process stop ID
|
|
if (m_process->GetStopID() == m_dyld_all_image_infos_stop_id)
|
|
return true;
|
|
|
|
m_dyld_all_image_infos.Clear();
|
|
if (m_dyld_all_image_infos_addr != LLDB_INVALID_ADDRESS)
|
|
{
|
|
ByteOrder byte_order = m_process->GetTarget().GetArchitecture().GetByteOrder();
|
|
uint32_t addr_size = 4;
|
|
if (m_dyld_all_image_infos_addr > UINT32_MAX)
|
|
addr_size = 8;
|
|
|
|
uint8_t buf[256];
|
|
DataExtractor data (buf, sizeof(buf), byte_order, addr_size);
|
|
lldb::offset_t offset = 0;
|
|
|
|
const size_t count_v2 = sizeof (uint32_t) + // version
|
|
sizeof (uint32_t) + // infoArrayCount
|
|
addr_size + // infoArray
|
|
addr_size + // notification
|
|
addr_size + // processDetachedFromSharedRegion + libSystemInitialized + pad
|
|
addr_size; // dyldImageLoadAddress
|
|
const size_t count_v11 = count_v2 +
|
|
addr_size + // jitInfo
|
|
addr_size + // dyldVersion
|
|
addr_size + // errorMessage
|
|
addr_size + // terminationFlags
|
|
addr_size + // coreSymbolicationShmPage
|
|
addr_size + // systemOrderFlag
|
|
addr_size + // uuidArrayCount
|
|
addr_size + // uuidArray
|
|
addr_size + // dyldAllImageInfosAddress
|
|
addr_size + // initialImageCount
|
|
addr_size + // errorKind
|
|
addr_size + // errorClientOfDylibPath
|
|
addr_size + // errorTargetDylibPath
|
|
addr_size; // errorSymbol
|
|
const size_t count_v13 = count_v11 +
|
|
addr_size + // sharedCacheSlide
|
|
sizeof (uuid_t); // sharedCacheUUID
|
|
UNUSED_IF_ASSERT_DISABLED(count_v13);
|
|
assert (sizeof (buf) >= count_v13);
|
|
|
|
Error error;
|
|
if (m_process->ReadMemory (m_dyld_all_image_infos_addr, buf, 4, error) == 4)
|
|
{
|
|
m_dyld_all_image_infos.version = data.GetU32(&offset);
|
|
// If anything in the high byte is set, we probably got the byte
|
|
// order incorrect (the process might not have it set correctly
|
|
// yet due to attaching to a program without a specified file).
|
|
if (m_dyld_all_image_infos.version & 0xff000000)
|
|
{
|
|
// We have guessed the wrong byte order. Swap it and try
|
|
// reading the version again.
|
|
if (byte_order == eByteOrderLittle)
|
|
byte_order = eByteOrderBig;
|
|
else
|
|
byte_order = eByteOrderLittle;
|
|
|
|
data.SetByteOrder (byte_order);
|
|
offset = 0;
|
|
m_dyld_all_image_infos.version = data.GetU32(&offset);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
|
|
const size_t count = (m_dyld_all_image_infos.version >= 11) ? count_v11 : count_v2;
|
|
|
|
const size_t bytes_read = m_process->ReadMemory (m_dyld_all_image_infos_addr, buf, count, error);
|
|
if (bytes_read == count)
|
|
{
|
|
offset = 0;
|
|
m_dyld_all_image_infos.version = data.GetU32(&offset);
|
|
m_dyld_all_image_infos.dylib_info_count = data.GetU32(&offset);
|
|
m_dyld_all_image_infos.dylib_info_addr = data.GetPointer(&offset);
|
|
m_dyld_all_image_infos.notification = data.GetPointer(&offset);
|
|
m_dyld_all_image_infos.processDetachedFromSharedRegion = data.GetU8(&offset);
|
|
m_dyld_all_image_infos.libSystemInitialized = data.GetU8(&offset);
|
|
// Adjust for padding.
|
|
offset += addr_size - 2;
|
|
m_dyld_all_image_infos.dyldImageLoadAddress = data.GetPointer(&offset);
|
|
if (m_dyld_all_image_infos.version >= 11)
|
|
{
|
|
offset += addr_size * 8;
|
|
uint64_t dyld_all_image_infos_addr = data.GetPointer(&offset);
|
|
|
|
// When we started, we were given the actual address of the all_image_infos
|
|
// struct (probably via TASK_DYLD_INFO) in memory - this address is stored in
|
|
// m_dyld_all_image_infos_addr and is the most accurate address we have.
|
|
|
|
// We read the dyld_all_image_infos struct from memory; it contains its own address.
|
|
// If the address in the struct does not match the actual address,
|
|
// the dyld we're looking at has been loaded at a different location (slid) from
|
|
// where it intended to load. The addresses in the dyld_all_image_infos struct
|
|
// are the original, non-slid addresses, and need to be adjusted. Most importantly
|
|
// the address of dyld and the notification address need to be adjusted.
|
|
|
|
if (dyld_all_image_infos_addr != m_dyld_all_image_infos_addr)
|
|
{
|
|
uint64_t image_infos_offset = dyld_all_image_infos_addr - m_dyld_all_image_infos.dyldImageLoadAddress;
|
|
uint64_t notification_offset = m_dyld_all_image_infos.notification - m_dyld_all_image_infos.dyldImageLoadAddress;
|
|
m_dyld_all_image_infos.dyldImageLoadAddress = m_dyld_all_image_infos_addr - image_infos_offset;
|
|
m_dyld_all_image_infos.notification = m_dyld_all_image_infos.dyldImageLoadAddress + notification_offset;
|
|
}
|
|
}
|
|
m_dyld_all_image_infos_stop_id = m_process->GetStopID();
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
// This method is an amalgamation of code from
|
|
// ReadMachHeader()
|
|
// ParseLoadCommands()
|
|
// UpdateImageInfosHeaderAndLoadCommands()
|
|
// but written to extract everything from the JSON packet from debugserver, instead of using memory reads.
|
|
|
|
bool
|
|
DynamicLoaderMacOSXDYLD::AddModulesUsingInfosFromDebugserver (StructuredData::ObjectSP image_details, DYLDImageInfo::collection &image_infos)
|
|
{
|
|
StructuredData::ObjectSP images_sp = image_details->GetAsDictionary()->GetValueForKey("images");
|
|
if (images_sp.get() == nullptr)
|
|
return false;
|
|
|
|
image_infos.resize (images_sp->GetAsArray()->GetSize());
|
|
|
|
uint32_t exe_idx = UINT32_MAX;
|
|
|
|
for (size_t i = 0; i < image_infos.size(); i++)
|
|
{
|
|
StructuredData::ObjectSP image_sp = images_sp->GetAsArray()->GetItemAtIndex(i);
|
|
if (image_sp.get() == nullptr || image_sp->GetAsDictionary() == nullptr)
|
|
return false;
|
|
StructuredData::Dictionary *image = image_sp->GetAsDictionary();
|
|
if (image->HasKey("load_address") == false
|
|
|| image->HasKey("pathname") == false
|
|
|| image->HasKey("mod_date") == false
|
|
|| image->HasKey("mach_header") == false
|
|
|| image->GetValueForKey("mach_header")->GetAsDictionary() == nullptr
|
|
|| image->HasKey("segments") == false
|
|
|| image->GetValueForKey("segments")->GetAsArray() == nullptr
|
|
|| image->HasKey("uuid") == false )
|
|
{
|
|
return false;
|
|
}
|
|
image_infos[i].address = image->GetValueForKey("load_address")->GetAsInteger()->GetValue();
|
|
image_infos[i].mod_date = image->GetValueForKey("mod_date")->GetAsInteger()->GetValue();
|
|
image_infos[i].file_spec.SetFile(image->GetValueForKey("pathname")->GetAsString()->GetValue().c_str(), false);
|
|
|
|
StructuredData::Dictionary *mh = image->GetValueForKey("mach_header")->GetAsDictionary();
|
|
image_infos[i].header.magic = mh->GetValueForKey("magic")->GetAsInteger()->GetValue();
|
|
image_infos[i].header.cputype = mh->GetValueForKey("cputype")->GetAsInteger()->GetValue();
|
|
image_infos[i].header.cpusubtype = mh->GetValueForKey("cpusubtype")->GetAsInteger()->GetValue();
|
|
image_infos[i].header.filetype = mh->GetValueForKey("filetype")->GetAsInteger()->GetValue();
|
|
|
|
// Fields that aren't used by DynamicLoaderMacOSXDYLD so debugserver doesn't currently send them
|
|
// in the reply.
|
|
|
|
if (mh->HasKey("flags"))
|
|
image_infos[i].header.flags = mh->GetValueForKey("flags")->GetAsInteger()->GetValue();
|
|
else
|
|
image_infos[i].header.flags = 0;
|
|
|
|
if (mh->HasKey("ncmds"))
|
|
image_infos[i].header.ncmds = mh->GetValueForKey("ncmds")->GetAsInteger()->GetValue();
|
|
else
|
|
image_infos[i].header.ncmds = 0;
|
|
|
|
if (mh->HasKey("sizeofcmds"))
|
|
image_infos[i].header.sizeofcmds = mh->GetValueForKey("sizeofcmds")->GetAsInteger()->GetValue();
|
|
else
|
|
image_infos[i].header.sizeofcmds = 0;
|
|
|
|
if (image_infos[i].header.filetype == llvm::MachO::MH_EXECUTE)
|
|
exe_idx = i;
|
|
|
|
StructuredData::Array *segments = image->GetValueForKey("segments")->GetAsArray();
|
|
uint32_t segcount = segments->GetSize();
|
|
for (size_t j = 0; j < segcount; j++)
|
|
{
|
|
Segment segment;
|
|
StructuredData::Dictionary *seg = segments->GetItemAtIndex(j)->GetAsDictionary();
|
|
segment.name = ConstString(seg->GetValueForKey("name")->GetAsString()->GetValue().c_str());
|
|
segment.vmaddr = seg->GetValueForKey("vmaddr")->GetAsInteger()->GetValue();
|
|
segment.vmsize = seg->GetValueForKey("vmsize")->GetAsInteger()->GetValue();
|
|
segment.fileoff = seg->GetValueForKey("fileoff")->GetAsInteger()->GetValue();
|
|
segment.filesize = seg->GetValueForKey("filesize")->GetAsInteger()->GetValue();
|
|
segment.maxprot = seg->GetValueForKey("maxprot")->GetAsInteger()->GetValue();
|
|
|
|
// Fields that aren't used by DynamicLoaderMacOSXDYLD so debugserver doesn't currently send them
|
|
// in the reply.
|
|
|
|
if (seg->HasKey("initprot"))
|
|
segment.initprot = seg->GetValueForKey("initprot")->GetAsInteger()->GetValue();
|
|
else
|
|
segment.initprot = 0;
|
|
|
|
if (seg->HasKey("flags"))
|
|
segment.flags = seg->GetValueForKey("flags")->GetAsInteger()->GetValue();
|
|
else
|
|
segment.flags = 0;
|
|
|
|
if (seg->HasKey("nsects"))
|
|
segment.nsects = seg->GetValueForKey("nsects")->GetAsInteger()->GetValue();
|
|
else
|
|
segment.nsects = 0;
|
|
|
|
image_infos[i].segments.push_back (segment);
|
|
}
|
|
|
|
image_infos[i].uuid.SetFromCString (image->GetValueForKey("uuid")->GetAsString()->GetValue().c_str());
|
|
|
|
// All sections listed in the dyld image info structure will all
|
|
// either be fixed up already, or they will all be off by a single
|
|
// slide amount that is determined by finding the first segment
|
|
// that is at file offset zero which also has bytes (a file size
|
|
// that is greater than zero) in the object file.
|
|
|
|
// Determine the slide amount (if any)
|
|
const size_t num_sections = image_infos[i].segments.size();
|
|
for (size_t k = 0; k < num_sections; ++k)
|
|
{
|
|
// Iterate through the object file sections to find the
|
|
// first section that starts of file offset zero and that
|
|
// has bytes in the file...
|
|
if ((image_infos[i].segments[k].fileoff == 0 && image_infos[i].segments[k].filesize > 0)
|
|
|| (image_infos[i].segments[k].name == ConstString("__TEXT")))
|
|
{
|
|
image_infos[i].slide = image_infos[i].address - image_infos[i].segments[k].vmaddr;
|
|
// We have found the slide amount, so we can exit
|
|
// this for loop.
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
Target &target = m_process->GetTarget();
|
|
|
|
if (exe_idx < image_infos.size())
|
|
{
|
|
const bool can_create = true;
|
|
ModuleSP exe_module_sp (FindTargetModuleForDYLDImageInfo (image_infos[exe_idx], can_create, NULL));
|
|
|
|
if (exe_module_sp)
|
|
{
|
|
UpdateImageLoadAddress (exe_module_sp.get(), image_infos[exe_idx]);
|
|
|
|
if (exe_module_sp.get() != target.GetExecutableModulePointer())
|
|
{
|
|
// Don't load dependent images since we are in dyld where we will know
|
|
// and find out about all images that are loaded. Also when setting the
|
|
// executable module, it will clear the targets module list, and if we
|
|
// have an in memory dyld module, it will get removed from the list
|
|
// so we will need to add it back after setting the executable module,
|
|
// so we first try and see if we already have a weak pointer to the
|
|
// dyld module, make it into a shared pointer, then add the executable,
|
|
// then re-add it back to make sure it is always in the list.
|
|
ModuleSP dyld_module_sp(m_dyld_module_wp.lock());
|
|
|
|
const bool get_dependent_images = false;
|
|
m_process->GetTarget().SetExecutableModule (exe_module_sp,
|
|
get_dependent_images);
|
|
|
|
if (dyld_module_sp)
|
|
{
|
|
if(target.GetImages().AppendIfNeeded (dyld_module_sp))
|
|
{
|
|
// Also add it to the section list.
|
|
UpdateImageLoadAddress(dyld_module_sp.get(), m_dyld);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
DynamicLoaderMacOSXDYLD::AddModulesUsingImageInfosAddress (lldb::addr_t image_infos_addr, uint32_t image_infos_count)
|
|
{
|
|
DYLDImageInfo::collection image_infos;
|
|
Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER));
|
|
if (log)
|
|
log->Printf ("Adding %d modules.\n", image_infos_count);
|
|
|
|
Mutex::Locker locker(m_mutex);
|
|
if (m_process->GetStopID() == m_dyld_image_infos_stop_id)
|
|
return true;
|
|
|
|
StructuredData::ObjectSP image_infos_json_sp = m_process->GetLoadedDynamicLibrariesInfos (image_infos_addr, image_infos_count);
|
|
if (image_infos_json_sp.get()
|
|
&& image_infos_json_sp->GetAsDictionary()
|
|
&& image_infos_json_sp->GetAsDictionary()->HasKey("images")
|
|
&& image_infos_json_sp->GetAsDictionary()->GetValueForKey("images")->GetAsArray()
|
|
&& image_infos_json_sp->GetAsDictionary()->GetValueForKey("images")->GetAsArray()->GetSize() == image_infos_count)
|
|
{
|
|
bool return_value = false;
|
|
if (AddModulesUsingInfosFromDebugserver (image_infos_json_sp, image_infos))
|
|
{
|
|
return_value = AddModulesUsingImageInfos (image_infos);
|
|
}
|
|
m_dyld_image_infos_stop_id = m_process->GetStopID();
|
|
return return_value;
|
|
}
|
|
|
|
if (!ReadImageInfos (image_infos_addr, image_infos_count, image_infos))
|
|
return false;
|
|
|
|
UpdateImageInfosHeaderAndLoadCommands (image_infos, image_infos_count, false);
|
|
bool return_value = AddModulesUsingImageInfos (image_infos);
|
|
m_dyld_image_infos_stop_id = m_process->GetStopID();
|
|
return return_value;
|
|
}
|
|
|
|
// Adds the modules in image_infos to m_dyld_image_infos.
|
|
// NB don't call this passing in m_dyld_image_infos.
|
|
|
|
bool
|
|
DynamicLoaderMacOSXDYLD::AddModulesUsingImageInfos (DYLDImageInfo::collection &image_infos)
|
|
{
|
|
// Now add these images to the main list.
|
|
ModuleList loaded_module_list;
|
|
Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER));
|
|
Target &target = m_process->GetTarget();
|
|
ModuleList& target_images = target.GetImages();
|
|
|
|
for (uint32_t idx = 0; idx < image_infos.size(); ++idx)
|
|
{
|
|
if (log)
|
|
{
|
|
log->Printf ("Adding new image at address=0x%16.16" PRIx64 ".", image_infos[idx].address);
|
|
image_infos[idx].PutToLog (log);
|
|
}
|
|
|
|
m_dyld_image_infos.push_back(image_infos[idx]);
|
|
|
|
ModuleSP image_module_sp (FindTargetModuleForDYLDImageInfo (image_infos[idx], true, NULL));
|
|
|
|
if (image_module_sp)
|
|
{
|
|
ObjectFile *objfile = image_module_sp->GetObjectFile ();
|
|
if (objfile)
|
|
{
|
|
SectionList *sections = objfile->GetSectionList();
|
|
if (sections)
|
|
{
|
|
ConstString commpage_dbstr("__commpage");
|
|
Section *commpage_section = sections->FindSectionByName(commpage_dbstr).get();
|
|
if (commpage_section)
|
|
{
|
|
ModuleSpec module_spec (objfile->GetFileSpec(), image_infos[idx].GetArchitecture ());
|
|
module_spec.GetObjectName() = commpage_dbstr;
|
|
ModuleSP commpage_image_module_sp(target_images.FindFirstModule (module_spec));
|
|
if (!commpage_image_module_sp)
|
|
{
|
|
module_spec.SetObjectOffset (objfile->GetFileOffset() + commpage_section->GetFileOffset());
|
|
module_spec.SetObjectSize (objfile->GetByteSize());
|
|
commpage_image_module_sp = target.GetSharedModule (module_spec);
|
|
if (!commpage_image_module_sp || commpage_image_module_sp->GetObjectFile() == NULL)
|
|
{
|
|
commpage_image_module_sp = m_process->ReadModuleFromMemory (image_infos[idx].file_spec,
|
|
image_infos[idx].address);
|
|
// Always load a memory image right away in the target in case
|
|
// we end up trying to read the symbol table from memory... The
|
|
// __LINKEDIT will need to be mapped so we can figure out where
|
|
// the symbol table bits are...
|
|
bool changed = false;
|
|
UpdateImageLoadAddress (commpage_image_module_sp.get(), image_infos[idx]);
|
|
target.GetImages().Append(commpage_image_module_sp);
|
|
if (changed)
|
|
{
|
|
image_infos[idx].load_stop_id = m_process->GetStopID();
|
|
loaded_module_list.AppendIfNeeded (commpage_image_module_sp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// UpdateImageLoadAddress will return true if any segments
|
|
// change load address. We need to check this so we don't
|
|
// mention that all loaded shared libraries are newly loaded
|
|
// each time we hit out dyld breakpoint since dyld will list all
|
|
// shared libraries each time.
|
|
if (UpdateImageLoadAddress (image_module_sp.get(), image_infos[idx]))
|
|
{
|
|
target_images.AppendIfNeeded(image_module_sp);
|
|
loaded_module_list.AppendIfNeeded (image_module_sp);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (loaded_module_list.GetSize() > 0)
|
|
{
|
|
if (log)
|
|
loaded_module_list.LogUUIDAndPaths (log, "DynamicLoaderMacOSXDYLD::ModulesDidLoad");
|
|
m_process->GetTarget().ModulesDidLoad (loaded_module_list);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
DynamicLoaderMacOSXDYLD::RemoveModulesUsingImageInfosAddress (lldb::addr_t image_infos_addr, uint32_t image_infos_count)
|
|
{
|
|
DYLDImageInfo::collection image_infos;
|
|
Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER));
|
|
|
|
Mutex::Locker locker(m_mutex);
|
|
if (m_process->GetStopID() == m_dyld_image_infos_stop_id)
|
|
return true;
|
|
|
|
// First read in the image_infos for the removed modules, and their headers & load commands.
|
|
if (!ReadImageInfos (image_infos_addr, image_infos_count, image_infos))
|
|
{
|
|
if (log)
|
|
log->PutCString ("Failed reading image infos array.");
|
|
return false;
|
|
}
|
|
|
|
if (log)
|
|
log->Printf ("Removing %d modules.", image_infos_count);
|
|
|
|
ModuleList unloaded_module_list;
|
|
for (uint32_t idx = 0; idx < image_infos.size(); ++idx)
|
|
{
|
|
if (log)
|
|
{
|
|
log->Printf ("Removing module at address=0x%16.16" PRIx64 ".", image_infos[idx].address);
|
|
image_infos[idx].PutToLog (log);
|
|
}
|
|
|
|
// Remove this image_infos from the m_all_image_infos. We do the comparison by address
|
|
// rather than by file spec because we can have many modules with the same "file spec" in the
|
|
// case that they are modules loaded from memory.
|
|
//
|
|
// Also copy over the uuid from the old entry to the removed entry so we can
|
|
// use it to lookup the module in the module list.
|
|
|
|
DYLDImageInfo::collection::iterator pos, end = m_dyld_image_infos.end();
|
|
for (pos = m_dyld_image_infos.begin(); pos != end; pos++)
|
|
{
|
|
if (image_infos[idx].address == (*pos).address)
|
|
{
|
|
image_infos[idx].uuid = (*pos).uuid;
|
|
|
|
// Add the module from this image_info to the "unloaded_module_list". We'll remove them all at
|
|
// one go later on.
|
|
|
|
ModuleSP unload_image_module_sp (FindTargetModuleForDYLDImageInfo (image_infos[idx], false, NULL));
|
|
if (unload_image_module_sp.get())
|
|
{
|
|
// When we unload, be sure to use the image info from the old list,
|
|
// since that has sections correctly filled in.
|
|
UnloadImageLoadAddress (unload_image_module_sp.get(), *pos);
|
|
unloaded_module_list.AppendIfNeeded (unload_image_module_sp);
|
|
}
|
|
else
|
|
{
|
|
if (log)
|
|
{
|
|
log->Printf ("Could not find module for unloading info entry:");
|
|
image_infos[idx].PutToLog(log);
|
|
}
|
|
}
|
|
|
|
// Then remove it from the m_dyld_image_infos:
|
|
|
|
m_dyld_image_infos.erase(pos);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (pos == end)
|
|
{
|
|
if (log)
|
|
{
|
|
log->Printf ("Could not find image_info entry for unloading image:");
|
|
image_infos[idx].PutToLog(log);
|
|
}
|
|
}
|
|
}
|
|
if (unloaded_module_list.GetSize() > 0)
|
|
{
|
|
if (log)
|
|
{
|
|
log->PutCString("Unloaded:");
|
|
unloaded_module_list.LogUUIDAndPaths (log, "DynamicLoaderMacOSXDYLD::ModulesDidUnload");
|
|
}
|
|
m_process->GetTarget().GetImages().Remove (unloaded_module_list);
|
|
}
|
|
m_dyld_image_infos_stop_id = m_process->GetStopID();
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
DynamicLoaderMacOSXDYLD::ReadImageInfos (lldb::addr_t image_infos_addr,
|
|
uint32_t image_infos_count,
|
|
DYLDImageInfo::collection &image_infos)
|
|
{
|
|
const ByteOrder endian = m_dyld.GetByteOrder();
|
|
const uint32_t addr_size = m_dyld.GetAddressByteSize();
|
|
|
|
image_infos.resize(image_infos_count);
|
|
const size_t count = image_infos.size() * 3 * addr_size;
|
|
DataBufferHeap info_data(count, 0);
|
|
Error error;
|
|
const size_t bytes_read = m_process->ReadMemory (image_infos_addr,
|
|
info_data.GetBytes(),
|
|
info_data.GetByteSize(),
|
|
error);
|
|
if (bytes_read == count)
|
|
{
|
|
lldb::offset_t info_data_offset = 0;
|
|
DataExtractor info_data_ref(info_data.GetBytes(), info_data.GetByteSize(), endian, addr_size);
|
|
for (size_t i = 0; i < image_infos.size() && info_data_ref.ValidOffset(info_data_offset); i++)
|
|
{
|
|
image_infos[i].address = info_data_ref.GetPointer(&info_data_offset);
|
|
lldb::addr_t path_addr = info_data_ref.GetPointer(&info_data_offset);
|
|
image_infos[i].mod_date = info_data_ref.GetPointer(&info_data_offset);
|
|
|
|
char raw_path[PATH_MAX];
|
|
m_process->ReadCStringFromMemory (path_addr, raw_path, sizeof(raw_path), error);
|
|
// don't resolve the path
|
|
if (error.Success())
|
|
{
|
|
const bool resolve_path = false;
|
|
image_infos[i].file_spec.SetFile(raw_path, resolve_path);
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// If we have found where the "_dyld_all_image_infos" lives in memory,
|
|
// read the current info from it, and then update all image load
|
|
// addresses (or lack thereof). Only do this if this is the first time
|
|
// we're reading the dyld infos. Return true if we actually read anything,
|
|
// and false otherwise.
|
|
//----------------------------------------------------------------------
|
|
bool
|
|
DynamicLoaderMacOSXDYLD::InitializeFromAllImageInfos ()
|
|
{
|
|
Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER));
|
|
|
|
Mutex::Locker locker(m_mutex);
|
|
if (m_process->GetStopID() == m_dyld_image_infos_stop_id
|
|
|| m_dyld_image_infos.size() != 0)
|
|
return false;
|
|
|
|
if (ReadAllImageInfosStructure ())
|
|
{
|
|
// Nothing to load or unload?
|
|
if (m_dyld_all_image_infos.dylib_info_count == 0)
|
|
return true;
|
|
|
|
if (m_dyld_all_image_infos.dylib_info_addr == 0)
|
|
{
|
|
// DYLD is updating the images now. So we should say we have no images, and then we'll
|
|
// figure it out when we hit the added breakpoint.
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
if (!AddModulesUsingImageInfosAddress (m_dyld_all_image_infos.dylib_info_addr,
|
|
m_dyld_all_image_infos.dylib_info_count))
|
|
{
|
|
DEBUG_PRINTF("%s", "unable to read all data for all_dylib_infos.");
|
|
m_dyld_image_infos.clear();
|
|
}
|
|
}
|
|
|
|
// Now we have one more bit of business. If there is a library left in the images for our target that
|
|
// doesn't have a load address, then it must be something that we were expecting to load (for instance we
|
|
// read a load command for it) but it didn't in fact load - probably because DYLD_*_PATH pointed
|
|
// to an equivalent version. We don't want it to stay in the target's module list or it will confuse
|
|
// us, so unload it here.
|
|
Target &target = m_process->GetTarget();
|
|
const ModuleList &target_modules = target.GetImages();
|
|
ModuleList not_loaded_modules;
|
|
Mutex::Locker modules_locker(target_modules.GetMutex());
|
|
|
|
size_t num_modules = target_modules.GetSize();
|
|
for (size_t i = 0; i < num_modules; i++)
|
|
{
|
|
ModuleSP module_sp = target_modules.GetModuleAtIndexUnlocked (i);
|
|
if (!module_sp->IsLoadedInTarget (&target))
|
|
{
|
|
if (log)
|
|
{
|
|
StreamString s;
|
|
module_sp->GetDescription (&s);
|
|
log->Printf ("Unloading pre-run module: %s.", s.GetData ());
|
|
}
|
|
not_loaded_modules.Append (module_sp);
|
|
}
|
|
}
|
|
|
|
if (not_loaded_modules.GetSize() != 0)
|
|
{
|
|
target.GetImages().Remove(not_loaded_modules);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
else
|
|
return false;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Read a mach_header at ADDR into HEADER, and also fill in the load
|
|
// command data into LOAD_COMMAND_DATA if it is non-NULL.
|
|
//
|
|
// Returns true if we succeed, false if we fail for any reason.
|
|
//----------------------------------------------------------------------
|
|
bool
|
|
DynamicLoaderMacOSXDYLD::ReadMachHeader (lldb::addr_t addr, llvm::MachO::mach_header *header, DataExtractor *load_command_data)
|
|
{
|
|
DataBufferHeap header_bytes(sizeof(llvm::MachO::mach_header), 0);
|
|
Error error;
|
|
size_t bytes_read = m_process->ReadMemory (addr,
|
|
header_bytes.GetBytes(),
|
|
header_bytes.GetByteSize(),
|
|
error);
|
|
if (bytes_read == sizeof(llvm::MachO::mach_header))
|
|
{
|
|
lldb::offset_t offset = 0;
|
|
::memset (header, 0, sizeof(llvm::MachO::mach_header));
|
|
|
|
// Get the magic byte unswapped so we can figure out what we are dealing with
|
|
DataExtractor data(header_bytes.GetBytes(), header_bytes.GetByteSize(), endian::InlHostByteOrder(), 4);
|
|
header->magic = data.GetU32(&offset);
|
|
lldb::addr_t load_cmd_addr = addr;
|
|
data.SetByteOrder(DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic(header->magic));
|
|
switch (header->magic)
|
|
{
|
|
case llvm::MachO::MH_MAGIC:
|
|
case llvm::MachO::MH_CIGAM:
|
|
data.SetAddressByteSize(4);
|
|
load_cmd_addr += sizeof(llvm::MachO::mach_header);
|
|
break;
|
|
|
|
case llvm::MachO::MH_MAGIC_64:
|
|
case llvm::MachO::MH_CIGAM_64:
|
|
data.SetAddressByteSize(8);
|
|
load_cmd_addr += sizeof(llvm::MachO::mach_header_64);
|
|
break;
|
|
|
|
default:
|
|
return false;
|
|
}
|
|
|
|
// Read the rest of dyld's mach header
|
|
if (data.GetU32(&offset, &header->cputype, (sizeof(llvm::MachO::mach_header)/sizeof(uint32_t)) - 1))
|
|
{
|
|
if (load_command_data == NULL)
|
|
return true; // We were able to read the mach_header and weren't asked to read the load command bytes
|
|
|
|
DataBufferSP load_cmd_data_sp(new DataBufferHeap(header->sizeofcmds, 0));
|
|
|
|
size_t load_cmd_bytes_read = m_process->ReadMemory (load_cmd_addr,
|
|
load_cmd_data_sp->GetBytes(),
|
|
load_cmd_data_sp->GetByteSize(),
|
|
error);
|
|
|
|
if (load_cmd_bytes_read == header->sizeofcmds)
|
|
{
|
|
// Set the load command data and also set the correct endian
|
|
// swap settings and the correct address size
|
|
load_command_data->SetData(load_cmd_data_sp, 0, header->sizeofcmds);
|
|
load_command_data->SetByteOrder(data.GetByteOrder());
|
|
load_command_data->SetAddressByteSize(data.GetAddressByteSize());
|
|
return true; // We successfully read the mach_header and the load command data
|
|
}
|
|
|
|
return false; // We weren't able to read the load command data
|
|
}
|
|
}
|
|
return false; // We failed the read the mach_header
|
|
}
|
|
|
|
|
|
//----------------------------------------------------------------------
|
|
// Parse the load commands for an image
|
|
//----------------------------------------------------------------------
|
|
uint32_t
|
|
DynamicLoaderMacOSXDYLD::ParseLoadCommands (const DataExtractor& data, DYLDImageInfo& dylib_info, FileSpec *lc_id_dylinker)
|
|
{
|
|
lldb::offset_t offset = 0;
|
|
uint32_t cmd_idx;
|
|
Segment segment;
|
|
dylib_info.Clear (true);
|
|
|
|
for (cmd_idx = 0; cmd_idx < dylib_info.header.ncmds; cmd_idx++)
|
|
{
|
|
// Clear out any load command specific data from DYLIB_INFO since
|
|
// we are about to read it.
|
|
|
|
if (data.ValidOffsetForDataOfSize (offset, sizeof(llvm::MachO::load_command)))
|
|
{
|
|
llvm::MachO::load_command load_cmd;
|
|
lldb::offset_t load_cmd_offset = offset;
|
|
load_cmd.cmd = data.GetU32 (&offset);
|
|
load_cmd.cmdsize = data.GetU32 (&offset);
|
|
switch (load_cmd.cmd)
|
|
{
|
|
case llvm::MachO::LC_SEGMENT:
|
|
{
|
|
segment.name.SetTrimmedCStringWithLength ((const char *)data.GetData(&offset, 16), 16);
|
|
// We are putting 4 uint32_t values 4 uint64_t values so
|
|
// we have to use multiple 32 bit gets below.
|
|
segment.vmaddr = data.GetU32 (&offset);
|
|
segment.vmsize = data.GetU32 (&offset);
|
|
segment.fileoff = data.GetU32 (&offset);
|
|
segment.filesize = data.GetU32 (&offset);
|
|
// Extract maxprot, initprot, nsects and flags all at once
|
|
data.GetU32(&offset, &segment.maxprot, 4);
|
|
dylib_info.segments.push_back (segment);
|
|
}
|
|
break;
|
|
|
|
case llvm::MachO::LC_SEGMENT_64:
|
|
{
|
|
segment.name.SetTrimmedCStringWithLength ((const char *)data.GetData(&offset, 16), 16);
|
|
// Extract vmaddr, vmsize, fileoff, and filesize all at once
|
|
data.GetU64(&offset, &segment.vmaddr, 4);
|
|
// Extract maxprot, initprot, nsects and flags all at once
|
|
data.GetU32(&offset, &segment.maxprot, 4);
|
|
dylib_info.segments.push_back (segment);
|
|
}
|
|
break;
|
|
|
|
case llvm::MachO::LC_ID_DYLINKER:
|
|
if (lc_id_dylinker)
|
|
{
|
|
const lldb::offset_t name_offset = load_cmd_offset + data.GetU32 (&offset);
|
|
const char *path = data.PeekCStr (name_offset);
|
|
lc_id_dylinker->SetFile (path, true);
|
|
}
|
|
break;
|
|
|
|
case llvm::MachO::LC_UUID:
|
|
dylib_info.uuid.SetBytes(data.GetData (&offset, 16));
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
// Set offset to be the beginning of the next load command.
|
|
offset = load_cmd_offset + load_cmd.cmdsize;
|
|
}
|
|
}
|
|
|
|
// All sections listed in the dyld image info structure will all
|
|
// either be fixed up already, or they will all be off by a single
|
|
// slide amount that is determined by finding the first segment
|
|
// that is at file offset zero which also has bytes (a file size
|
|
// that is greater than zero) in the object file.
|
|
|
|
// Determine the slide amount (if any)
|
|
const size_t num_sections = dylib_info.segments.size();
|
|
for (size_t i = 0; i < num_sections; ++i)
|
|
{
|
|
// Iterate through the object file sections to find the
|
|
// first section that starts of file offset zero and that
|
|
// has bytes in the file...
|
|
if ((dylib_info.segments[i].fileoff == 0 && dylib_info.segments[i].filesize > 0) || (dylib_info.segments[i].name == ConstString("__TEXT")))
|
|
{
|
|
dylib_info.slide = dylib_info.address - dylib_info.segments[i].vmaddr;
|
|
// We have found the slide amount, so we can exit
|
|
// this for loop.
|
|
break;
|
|
}
|
|
}
|
|
return cmd_idx;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Read the mach_header and load commands for each image that the
|
|
// _dyld_all_image_infos structure points to and cache the results.
|
|
//----------------------------------------------------------------------
|
|
|
|
void
|
|
DynamicLoaderMacOSXDYLD::UpdateImageInfosHeaderAndLoadCommands(DYLDImageInfo::collection &image_infos,
|
|
uint32_t infos_count,
|
|
bool update_executable)
|
|
{
|
|
uint32_t exe_idx = UINT32_MAX;
|
|
// Read any UUID values that we can get
|
|
for (uint32_t i = 0; i < infos_count; i++)
|
|
{
|
|
if (!image_infos[i].UUIDValid())
|
|
{
|
|
DataExtractor data; // Load command data
|
|
if (!ReadMachHeader (image_infos[i].address, &image_infos[i].header, &data))
|
|
continue;
|
|
|
|
ParseLoadCommands (data, image_infos[i], NULL);
|
|
|
|
if (image_infos[i].header.filetype == llvm::MachO::MH_EXECUTE)
|
|
exe_idx = i;
|
|
|
|
}
|
|
}
|
|
|
|
Target &target = m_process->GetTarget();
|
|
|
|
if (exe_idx < image_infos.size())
|
|
{
|
|
const bool can_create = true;
|
|
ModuleSP exe_module_sp (FindTargetModuleForDYLDImageInfo (image_infos[exe_idx], can_create, NULL));
|
|
|
|
if (exe_module_sp)
|
|
{
|
|
UpdateImageLoadAddress (exe_module_sp.get(), image_infos[exe_idx]);
|
|
|
|
if (exe_module_sp.get() != target.GetExecutableModulePointer())
|
|
{
|
|
// Don't load dependent images since we are in dyld where we will know
|
|
// and find out about all images that are loaded. Also when setting the
|
|
// executable module, it will clear the targets module list, and if we
|
|
// have an in memory dyld module, it will get removed from the list
|
|
// so we will need to add it back after setting the executable module,
|
|
// so we first try and see if we already have a weak pointer to the
|
|
// dyld module, make it into a shared pointer, then add the executable,
|
|
// then re-add it back to make sure it is always in the list.
|
|
ModuleSP dyld_module_sp(m_dyld_module_wp.lock());
|
|
|
|
const bool get_dependent_images = false;
|
|
m_process->GetTarget().SetExecutableModule (exe_module_sp,
|
|
get_dependent_images);
|
|
|
|
if (dyld_module_sp)
|
|
{
|
|
if(target.GetImages().AppendIfNeeded (dyld_module_sp))
|
|
{
|
|
// Also add it to the section list.
|
|
UpdateImageLoadAddress(dyld_module_sp.get(), m_dyld);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// On Mac OS X libobjc (the Objective-C runtime) has several critical dispatch
|
|
// functions written in hand-written assembly, and also have hand-written unwind
|
|
// information in the eh_frame section. Normally we prefer analyzing the
|
|
// assembly instructions of a currently executing frame to unwind from that frame --
|
|
// but on hand-written functions this profiling can fail. We should use the
|
|
// eh_frame instructions for these functions all the time.
|
|
//
|
|
// As an aside, it would be better if the eh_frame entries had a flag (or were
|
|
// extensible so they could have an Apple-specific flag) which indicates that
|
|
// the instructions are asynchronous -- accurate at every instruction, instead
|
|
// of our normal default assumption that they are not.
|
|
//----------------------------------------------------------------------
|
|
|
|
bool
|
|
DynamicLoaderMacOSXDYLD::AlwaysRelyOnEHUnwindInfo (SymbolContext &sym_ctx)
|
|
{
|
|
ModuleSP module_sp;
|
|
if (sym_ctx.symbol)
|
|
{
|
|
module_sp = sym_ctx.symbol->GetAddressRef().GetModule();
|
|
}
|
|
if (module_sp.get() == NULL && sym_ctx.function)
|
|
{
|
|
module_sp = sym_ctx.function->GetAddressRange().GetBaseAddress().GetModule();
|
|
}
|
|
if (module_sp.get() == NULL)
|
|
return false;
|
|
|
|
ObjCLanguageRuntime *objc_runtime = m_process->GetObjCLanguageRuntime();
|
|
if (objc_runtime != NULL && objc_runtime->IsModuleObjCLibrary (module_sp))
|
|
{
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
|
|
//----------------------------------------------------------------------
|
|
// Dump a Segment to the file handle provided.
|
|
//----------------------------------------------------------------------
|
|
void
|
|
DynamicLoaderMacOSXDYLD::Segment::PutToLog (Log *log, lldb::addr_t slide) const
|
|
{
|
|
if (log)
|
|
{
|
|
if (slide == 0)
|
|
log->Printf ("\t\t%16s [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ")",
|
|
name.AsCString(""),
|
|
vmaddr + slide,
|
|
vmaddr + slide + vmsize);
|
|
else
|
|
log->Printf ("\t\t%16s [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ") slide = 0x%" PRIx64,
|
|
name.AsCString(""),
|
|
vmaddr + slide,
|
|
vmaddr + slide + vmsize,
|
|
slide);
|
|
}
|
|
}
|
|
|
|
const DynamicLoaderMacOSXDYLD::Segment *
|
|
DynamicLoaderMacOSXDYLD::DYLDImageInfo::FindSegment (const ConstString &name) const
|
|
{
|
|
const size_t num_segments = segments.size();
|
|
for (size_t i=0; i<num_segments; ++i)
|
|
{
|
|
if (segments[i].name == name)
|
|
return &segments[i];
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
|
|
//----------------------------------------------------------------------
|
|
// Dump an image info structure to the file handle provided.
|
|
//----------------------------------------------------------------------
|
|
void
|
|
DynamicLoaderMacOSXDYLD::DYLDImageInfo::PutToLog (Log *log) const
|
|
{
|
|
if (log == NULL)
|
|
return;
|
|
const uint8_t *u = (const uint8_t *)uuid.GetBytes();
|
|
|
|
if (address == LLDB_INVALID_ADDRESS)
|
|
{
|
|
if (u)
|
|
{
|
|
log->Printf("\t modtime=0x%8.8" 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 path='%s' (UNLOADED)",
|
|
mod_date,
|
|
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],
|
|
file_spec.GetPath().c_str());
|
|
}
|
|
else
|
|
log->Printf("\t modtime=0x%8.8" PRIx64 " path='%s' (UNLOADED)",
|
|
mod_date,
|
|
file_spec.GetPath().c_str());
|
|
}
|
|
else
|
|
{
|
|
if (u)
|
|
{
|
|
log->Printf("\taddress=0x%16.16" PRIx64 " modtime=0x%8.8" 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 path='%s'",
|
|
address,
|
|
mod_date,
|
|
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],
|
|
file_spec.GetPath().c_str());
|
|
}
|
|
else
|
|
{
|
|
log->Printf("\taddress=0x%16.16" PRIx64 " modtime=0x%8.8" PRIx64 " path='%s'",
|
|
address,
|
|
mod_date,
|
|
file_spec.GetPath().c_str());
|
|
|
|
}
|
|
for (uint32_t i=0; i<segments.size(); ++i)
|
|
segments[i].PutToLog(log, slide);
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Dump the _dyld_all_image_infos members and all current image infos
|
|
// that we have parsed to the file handle provided.
|
|
//----------------------------------------------------------------------
|
|
void
|
|
DynamicLoaderMacOSXDYLD::PutToLog(Log *log) const
|
|
{
|
|
if (log == NULL)
|
|
return;
|
|
|
|
Mutex::Locker locker(m_mutex);
|
|
log->Printf("dyld_all_image_infos = { version=%d, count=%d, addr=0x%8.8" PRIx64 ", notify=0x%8.8" PRIx64 " }",
|
|
m_dyld_all_image_infos.version,
|
|
m_dyld_all_image_infos.dylib_info_count,
|
|
(uint64_t)m_dyld_all_image_infos.dylib_info_addr,
|
|
(uint64_t)m_dyld_all_image_infos.notification);
|
|
size_t i;
|
|
const size_t count = m_dyld_image_infos.size();
|
|
if (count > 0)
|
|
{
|
|
log->PutCString("Loaded:");
|
|
for (i = 0; i<count; i++)
|
|
m_dyld_image_infos[i].PutToLog(log);
|
|
}
|
|
}
|
|
|
|
void
|
|
DynamicLoaderMacOSXDYLD::PrivateInitialize(Process *process)
|
|
{
|
|
DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState()));
|
|
Clear(true);
|
|
m_process = process;
|
|
m_process->GetTarget().ClearAllLoadedSections();
|
|
}
|
|
|
|
bool
|
|
DynamicLoaderMacOSXDYLD::SetNotificationBreakpoint ()
|
|
{
|
|
DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState()));
|
|
if (m_break_id == LLDB_INVALID_BREAK_ID)
|
|
{
|
|
if (m_dyld_all_image_infos.notification != LLDB_INVALID_ADDRESS)
|
|
{
|
|
Address so_addr;
|
|
// Set the notification breakpoint and install a breakpoint
|
|
// callback function that will get called each time the
|
|
// breakpoint gets hit. We will use this to track when shared
|
|
// libraries get loaded/unloaded.
|
|
bool resolved = m_process->GetTarget().ResolveLoadAddress(m_dyld_all_image_infos.notification, so_addr);
|
|
if (!resolved)
|
|
{
|
|
ModuleSP dyld_module_sp = m_dyld_module_wp.lock();
|
|
if (dyld_module_sp)
|
|
{
|
|
UpdateImageLoadAddress (dyld_module_sp.get(), m_dyld);
|
|
resolved = m_process->GetTarget().ResolveLoadAddress(m_dyld_all_image_infos.notification, so_addr);
|
|
}
|
|
}
|
|
|
|
if (resolved)
|
|
{
|
|
Breakpoint *dyld_break = m_process->GetTarget().CreateBreakpoint (so_addr, true, false).get();
|
|
dyld_break->SetCallback (DynamicLoaderMacOSXDYLD::NotifyBreakpointHit, this, true);
|
|
dyld_break->SetBreakpointKind ("shared-library-event");
|
|
m_break_id = dyld_break->GetID();
|
|
}
|
|
}
|
|
}
|
|
return m_break_id != LLDB_INVALID_BREAK_ID;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Member function that gets called when the process state changes.
|
|
//----------------------------------------------------------------------
|
|
void
|
|
DynamicLoaderMacOSXDYLD::PrivateProcessStateChanged (Process *process, StateType state)
|
|
{
|
|
DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%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:
|
|
// Keep trying find dyld and set our notification breakpoint each time
|
|
// we stop until we succeed
|
|
if (!DidSetNotificationBreakpoint () && m_process->IsAlive())
|
|
{
|
|
if (NeedToLocateDYLD ())
|
|
LocateDYLD ();
|
|
|
|
SetNotificationBreakpoint ();
|
|
}
|
|
break;
|
|
|
|
case eStateRunning:
|
|
case eStateStepping:
|
|
case eStateCrashed:
|
|
case eStateSuspended:
|
|
break;
|
|
}
|
|
}
|
|
|
|
ThreadPlanSP
|
|
DynamicLoaderMacOSXDYLD::GetStepThroughTrampolinePlan (Thread &thread, bool stop_others)
|
|
{
|
|
ThreadPlanSP thread_plan_sp;
|
|
StackFrame *current_frame = thread.GetStackFrameAtIndex(0).get();
|
|
const SymbolContext ¤t_context = current_frame->GetSymbolContext(eSymbolContextSymbol);
|
|
Symbol *current_symbol = current_context.symbol;
|
|
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP));
|
|
TargetSP target_sp (thread.CalculateTarget());
|
|
|
|
if (current_symbol != NULL)
|
|
{
|
|
std::vector<Address> addresses;
|
|
|
|
if (current_symbol->IsTrampoline())
|
|
{
|
|
const ConstString &trampoline_name = current_symbol->GetMangled().GetName(current_symbol->GetLanguage(), Mangled::ePreferMangled);
|
|
|
|
if (trampoline_name)
|
|
{
|
|
const ModuleList &images = target_sp->GetImages();
|
|
|
|
SymbolContextList code_symbols;
|
|
images.FindSymbolsWithNameAndType(trampoline_name, eSymbolTypeCode, code_symbols);
|
|
size_t num_code_symbols = code_symbols.GetSize();
|
|
|
|
if (num_code_symbols > 0)
|
|
{
|
|
for (uint32_t i = 0; i < num_code_symbols; i++)
|
|
{
|
|
SymbolContext context;
|
|
AddressRange addr_range;
|
|
if (code_symbols.GetContextAtIndex(i, context))
|
|
{
|
|
context.GetAddressRange (eSymbolContextEverything, 0, false, addr_range);
|
|
addresses.push_back(addr_range.GetBaseAddress());
|
|
if (log)
|
|
{
|
|
addr_t load_addr = addr_range.GetBaseAddress().GetLoadAddress(target_sp.get());
|
|
|
|
log->Printf ("Found a trampoline target symbol at 0x%" PRIx64 ".", load_addr);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
SymbolContextList reexported_symbols;
|
|
images.FindSymbolsWithNameAndType(trampoline_name, eSymbolTypeReExported, reexported_symbols);
|
|
size_t num_reexported_symbols = reexported_symbols.GetSize();
|
|
if (num_reexported_symbols > 0)
|
|
{
|
|
for (uint32_t i = 0; i < num_reexported_symbols; i++)
|
|
{
|
|
SymbolContext context;
|
|
if (reexported_symbols.GetContextAtIndex(i, context))
|
|
{
|
|
if (context.symbol)
|
|
{
|
|
Symbol *actual_symbol = context.symbol->ResolveReExportedSymbol(*target_sp.get());
|
|
if (actual_symbol)
|
|
{
|
|
const Address actual_symbol_addr = actual_symbol->GetAddress();
|
|
if (actual_symbol_addr.IsValid())
|
|
{
|
|
addresses.push_back(actual_symbol_addr);
|
|
if (log)
|
|
{
|
|
lldb::addr_t load_addr = actual_symbol_addr.GetLoadAddress(target_sp.get());
|
|
log->Printf ("Found a re-exported symbol: %s at 0x%" PRIx64 ".",
|
|
actual_symbol->GetName().GetCString(), load_addr);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
SymbolContextList indirect_symbols;
|
|
images.FindSymbolsWithNameAndType(trampoline_name, eSymbolTypeResolver, indirect_symbols);
|
|
size_t num_indirect_symbols = indirect_symbols.GetSize();
|
|
if (num_indirect_symbols > 0)
|
|
{
|
|
for (uint32_t i = 0; i < num_indirect_symbols; i++)
|
|
{
|
|
SymbolContext context;
|
|
AddressRange addr_range;
|
|
if (indirect_symbols.GetContextAtIndex(i, context))
|
|
{
|
|
context.GetAddressRange (eSymbolContextEverything, 0, false, addr_range);
|
|
addresses.push_back(addr_range.GetBaseAddress());
|
|
if (log)
|
|
{
|
|
addr_t load_addr = addr_range.GetBaseAddress().GetLoadAddress(target_sp.get());
|
|
|
|
log->Printf ("Found an indirect target symbol at 0x%" PRIx64 ".", load_addr);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else if (current_symbol->GetType() == eSymbolTypeReExported)
|
|
{
|
|
// I am not sure we could ever end up stopped AT a re-exported symbol. But just in case:
|
|
|
|
const Symbol *actual_symbol = current_symbol->ResolveReExportedSymbol(*(target_sp.get()));
|
|
if (actual_symbol)
|
|
{
|
|
Address target_addr(actual_symbol->GetAddress());
|
|
if (target_addr.IsValid())
|
|
{
|
|
if (log)
|
|
log->Printf ("Found a re-exported symbol: %s pointing to: %s at 0x%" PRIx64 ".",
|
|
current_symbol->GetName().GetCString(),
|
|
actual_symbol->GetName().GetCString(),
|
|
target_addr.GetLoadAddress(target_sp.get()));
|
|
addresses.push_back (target_addr.GetLoadAddress(target_sp.get()));
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
if (addresses.size() > 0)
|
|
{
|
|
// First check whether any of the addresses point to Indirect symbols, and if they do, resolve them:
|
|
std::vector<lldb::addr_t> load_addrs;
|
|
for (Address address : addresses)
|
|
{
|
|
Symbol *symbol = address.CalculateSymbolContextSymbol();
|
|
if (symbol && symbol->IsIndirect())
|
|
{
|
|
Error error;
|
|
Address symbol_address = symbol->GetAddress();
|
|
addr_t resolved_addr = thread.GetProcess()->ResolveIndirectFunction(&symbol_address, error);
|
|
if (error.Success())
|
|
{
|
|
load_addrs.push_back(resolved_addr);
|
|
if (log)
|
|
log->Printf("ResolveIndirectFunction found resolved target for %s at 0x%" PRIx64 ".",
|
|
symbol->GetName().GetCString(), resolved_addr);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
load_addrs.push_back(address.GetLoadAddress(target_sp.get()));
|
|
}
|
|
|
|
}
|
|
thread_plan_sp.reset (new ThreadPlanRunToAddress (thread, load_addrs, stop_others));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (log)
|
|
log->Printf ("Could not find symbol for step through.");
|
|
}
|
|
|
|
return thread_plan_sp;
|
|
}
|
|
|
|
size_t
|
|
DynamicLoaderMacOSXDYLD::FindEquivalentSymbols (lldb_private::Symbol *original_symbol,
|
|
lldb_private::ModuleList &images,
|
|
lldb_private::SymbolContextList &equivalent_symbols)
|
|
{
|
|
const ConstString &trampoline_name = original_symbol->GetMangled().GetName(original_symbol->GetLanguage(), Mangled::ePreferMangled);
|
|
if (!trampoline_name)
|
|
return 0;
|
|
|
|
size_t initial_size = equivalent_symbols.GetSize();
|
|
|
|
static const char *resolver_name_regex = "(_gc|_non_gc|\\$[A-Za-z0-9\\$]+)$";
|
|
std::string equivalent_regex_buf("^");
|
|
equivalent_regex_buf.append (trampoline_name.GetCString());
|
|
equivalent_regex_buf.append (resolver_name_regex);
|
|
|
|
RegularExpression equivalent_name_regex (equivalent_regex_buf.c_str());
|
|
const bool append = true;
|
|
images.FindSymbolsMatchingRegExAndType (equivalent_name_regex, eSymbolTypeCode, equivalent_symbols, append);
|
|
|
|
return equivalent_symbols.GetSize() - initial_size;
|
|
}
|
|
|
|
Error
|
|
DynamicLoaderMacOSXDYLD::CanLoadImage ()
|
|
{
|
|
Error error;
|
|
// In order for us to tell if we can load a shared library we verify that
|
|
// the dylib_info_addr isn't zero (which means no shared libraries have
|
|
// been set yet, or dyld is currently mucking with the shared library list).
|
|
if (ReadAllImageInfosStructure ())
|
|
{
|
|
// TODO: also check the _dyld_global_lock_held variable in libSystem.B.dylib?
|
|
// TODO: check the malloc lock?
|
|
// TODO: check the objective C lock?
|
|
if (m_dyld_all_image_infos.dylib_info_addr != 0)
|
|
return error; // Success
|
|
}
|
|
|
|
error.SetErrorString("unsafe to load or unload shared libraries");
|
|
return error;
|
|
}
|
|
|
|
void
|
|
DynamicLoaderMacOSXDYLD::Initialize()
|
|
{
|
|
PluginManager::RegisterPlugin (GetPluginNameStatic(),
|
|
GetPluginDescriptionStatic(),
|
|
CreateInstance);
|
|
}
|
|
|
|
void
|
|
DynamicLoaderMacOSXDYLD::Terminate()
|
|
{
|
|
PluginManager::UnregisterPlugin (CreateInstance);
|
|
}
|
|
|
|
|
|
lldb_private::ConstString
|
|
DynamicLoaderMacOSXDYLD::GetPluginNameStatic()
|
|
{
|
|
static ConstString g_name("macosx-dyld");
|
|
return g_name;
|
|
}
|
|
|
|
const char *
|
|
DynamicLoaderMacOSXDYLD::GetPluginDescriptionStatic()
|
|
{
|
|
return "Dynamic loader plug-in that watches for shared library loads/unloads in MacOSX user processes.";
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------
|
|
// PluginInterface protocol
|
|
//------------------------------------------------------------------
|
|
lldb_private::ConstString
|
|
DynamicLoaderMacOSXDYLD::GetPluginName()
|
|
{
|
|
return GetPluginNameStatic();
|
|
}
|
|
|
|
uint32_t
|
|
DynamicLoaderMacOSXDYLD::GetPluginVersion()
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
uint32_t
|
|
DynamicLoaderMacOSXDYLD::AddrByteSize()
|
|
{
|
|
switch (m_dyld.header.magic)
|
|
{
|
|
case llvm::MachO::MH_MAGIC:
|
|
case llvm::MachO::MH_CIGAM:
|
|
return 4;
|
|
|
|
case llvm::MachO::MH_MAGIC_64:
|
|
case llvm::MachO::MH_CIGAM_64:
|
|
return 8;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
lldb::ByteOrder
|
|
DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic (uint32_t magic)
|
|
{
|
|
switch (magic)
|
|
{
|
|
case llvm::MachO::MH_MAGIC:
|
|
case llvm::MachO::MH_MAGIC_64:
|
|
return endian::InlHostByteOrder();
|
|
|
|
case llvm::MachO::MH_CIGAM:
|
|
case llvm::MachO::MH_CIGAM_64:
|
|
if (endian::InlHostByteOrder() == lldb::eByteOrderBig)
|
|
return lldb::eByteOrderLittle;
|
|
else
|
|
return lldb::eByteOrderBig;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
return lldb::eByteOrderInvalid;
|
|
}
|
|
|
|
lldb::ByteOrder
|
|
DynamicLoaderMacOSXDYLD::DYLDImageInfo::GetByteOrder()
|
|
{
|
|
return DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic(header.magic);
|
|
}
|
|
|