| //===-- MachTask.cpp --------------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| //---------------------------------------------------------------------- |
| // |
| // MachTask.cpp |
| // debugserver |
| // |
| // Created by Greg Clayton on 12/5/08. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "MachTask.h" |
| |
| // C Includes |
| |
| #include <mach-o/dyld_images.h> |
| #include <mach/mach_vm.h> |
| |
| // C++ Includes |
| // Other libraries and framework includes |
| // Project includes |
| #include "CFUtils.h" |
| #include "DNB.h" |
| #include "DNBError.h" |
| #include "DNBLog.h" |
| #include "MachProcess.h" |
| #include "DNBDataRef.h" |
| #include "stack_logging.h" |
| |
| #ifdef WITH_SPRINGBOARD |
| |
| #include <CoreFoundation/CoreFoundation.h> |
| #include <SpringBoardServices/SpringBoardServer.h> |
| #include <SpringBoardServices/SBSWatchdogAssertion.h> |
| |
| #endif |
| |
| //---------------------------------------------------------------------- |
| // MachTask constructor |
| //---------------------------------------------------------------------- |
| MachTask::MachTask(MachProcess *process) : |
| m_process (process), |
| m_task (TASK_NULL), |
| m_vm_memory (), |
| m_exception_thread (0), |
| m_exception_port (MACH_PORT_NULL) |
| { |
| memset(&m_exc_port_info, 0, sizeof(m_exc_port_info)); |
| |
| } |
| |
| //---------------------------------------------------------------------- |
| // Destructor |
| //---------------------------------------------------------------------- |
| MachTask::~MachTask() |
| { |
| Clear(); |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // MachTask::Suspend |
| //---------------------------------------------------------------------- |
| kern_return_t |
| MachTask::Suspend() |
| { |
| DNBError err; |
| task_t task = TaskPort(); |
| err = ::task_suspend (task); |
| if (DNBLogCheckLogBit(LOG_TASK) || err.Fail()) |
| err.LogThreaded("::task_suspend ( target_task = 0x%4.4x )", task); |
| return err.Error(); |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // MachTask::Resume |
| //---------------------------------------------------------------------- |
| kern_return_t |
| MachTask::Resume() |
| { |
| struct task_basic_info task_info; |
| task_t task = TaskPort(); |
| if (task == TASK_NULL) |
| return KERN_INVALID_ARGUMENT; |
| |
| DNBError err; |
| err = BasicInfo(task, &task_info); |
| |
| if (err.Success()) |
| { |
| // task_resume isn't counted like task_suspend calls are, are, so if the |
| // task is not suspended, don't try and resume it since it is already |
| // running |
| if (task_info.suspend_count > 0) |
| { |
| err = ::task_resume (task); |
| if (DNBLogCheckLogBit(LOG_TASK) || err.Fail()) |
| err.LogThreaded("::task_resume ( target_task = 0x%4.4x )", task); |
| } |
| } |
| return err.Error(); |
| } |
| |
| //---------------------------------------------------------------------- |
| // MachTask::ExceptionPort |
| //---------------------------------------------------------------------- |
| mach_port_t |
| MachTask::ExceptionPort() const |
| { |
| return m_exception_port; |
| } |
| |
| //---------------------------------------------------------------------- |
| // MachTask::ExceptionPortIsValid |
| //---------------------------------------------------------------------- |
| bool |
| MachTask::ExceptionPortIsValid() const |
| { |
| return MACH_PORT_VALID(m_exception_port); |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // MachTask::Clear |
| //---------------------------------------------------------------------- |
| void |
| MachTask::Clear() |
| { |
| // Do any cleanup needed for this task |
| m_task = TASK_NULL; |
| m_exception_thread = 0; |
| m_exception_port = MACH_PORT_NULL; |
| |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // MachTask::SaveExceptionPortInfo |
| //---------------------------------------------------------------------- |
| kern_return_t |
| MachTask::SaveExceptionPortInfo() |
| { |
| return m_exc_port_info.Save(TaskPort()); |
| } |
| |
| //---------------------------------------------------------------------- |
| // MachTask::RestoreExceptionPortInfo |
| //---------------------------------------------------------------------- |
| kern_return_t |
| MachTask::RestoreExceptionPortInfo() |
| { |
| return m_exc_port_info.Restore(TaskPort()); |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // MachTask::ReadMemory |
| //---------------------------------------------------------------------- |
| nub_size_t |
| MachTask::ReadMemory (nub_addr_t addr, nub_size_t size, void *buf) |
| { |
| nub_size_t n = 0; |
| task_t task = TaskPort(); |
| if (task != TASK_NULL) |
| { |
| n = m_vm_memory.Read(task, addr, buf, size); |
| |
| DNBLogThreadedIf(LOG_MEMORY, "MachTask::ReadMemory ( addr = 0x%8.8llx, size = %zu, buf = %p) => %zu bytes read", (uint64_t)addr, size, buf, n); |
| if (DNBLogCheckLogBit(LOG_MEMORY_DATA_LONG) || (DNBLogCheckLogBit(LOG_MEMORY_DATA_SHORT) && size <= 8)) |
| { |
| DNBDataRef data((uint8_t*)buf, n, false); |
| data.Dump(0, n, addr, DNBDataRef::TypeUInt8, 16); |
| } |
| } |
| return n; |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // MachTask::WriteMemory |
| //---------------------------------------------------------------------- |
| nub_size_t |
| MachTask::WriteMemory (nub_addr_t addr, nub_size_t size, const void *buf) |
| { |
| nub_size_t n = 0; |
| task_t task = TaskPort(); |
| if (task != TASK_NULL) |
| { |
| n = m_vm_memory.Write(task, addr, buf, size); |
| DNBLogThreadedIf(LOG_MEMORY, "MachTask::WriteMemory ( addr = 0x%8.8llx, size = %zu, buf = %p) => %zu bytes written", (uint64_t)addr, size, buf, n); |
| if (DNBLogCheckLogBit(LOG_MEMORY_DATA_LONG) || (DNBLogCheckLogBit(LOG_MEMORY_DATA_SHORT) && size <= 8)) |
| { |
| DNBDataRef data((uint8_t*)buf, n, false); |
| data.Dump(0, n, addr, DNBDataRef::TypeUInt8, 16); |
| } |
| } |
| return n; |
| } |
| |
| //---------------------------------------------------------------------- |
| // MachTask::MemoryRegionInfo |
| //---------------------------------------------------------------------- |
| int |
| MachTask::GetMemoryRegionInfo (nub_addr_t addr, DNBRegionInfo *region_info) |
| { |
| task_t task = TaskPort(); |
| if (task == TASK_NULL) |
| return -1; |
| |
| int ret = m_vm_memory.GetMemoryRegionInfo(task, addr, region_info); |
| DNBLogThreadedIf(LOG_MEMORY, "MachTask::MemoryRegionInfo ( addr = 0x%8.8llx ) => %i (start = 0x%8.8llx, size = 0x%8.8llx, permissions = %u)", |
| (uint64_t)addr, |
| ret, |
| (uint64_t)region_info->addr, |
| (uint64_t)region_info->size, |
| region_info->permissions); |
| return ret; |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // MachTask::TaskPortForProcessID |
| //---------------------------------------------------------------------- |
| task_t |
| MachTask::TaskPortForProcessID (DNBError &err) |
| { |
| if (m_task == TASK_NULL && m_process != NULL) |
| m_task = MachTask::TaskPortForProcessID(m_process->ProcessID(), err); |
| return m_task; |
| } |
| |
| //---------------------------------------------------------------------- |
| // MachTask::TaskPortForProcessID |
| //---------------------------------------------------------------------- |
| task_t |
| MachTask::TaskPortForProcessID (pid_t pid, DNBError &err, uint32_t num_retries, uint32_t usec_interval) |
| { |
| if (pid != INVALID_NUB_PROCESS) |
| { |
| DNBError err; |
| mach_port_t task_self = mach_task_self (); |
| task_t task = TASK_NULL; |
| for (uint32_t i=0; i<num_retries; i++) |
| { |
| err = ::task_for_pid ( task_self, pid, &task); |
| |
| if (DNBLogCheckLogBit(LOG_TASK) || err.Fail()) |
| { |
| char str[1024]; |
| ::snprintf (str, |
| sizeof(str), |
| "::task_for_pid ( target_tport = 0x%4.4x, pid = %d, &task ) => err = 0x%8.8x (%s)", |
| task_self, |
| pid, |
| err.Error(), |
| err.AsString() ? err.AsString() : "success"); |
| if (err.Fail()) |
| err.SetErrorString(str); |
| err.LogThreaded(str); |
| } |
| |
| if (err.Success()) |
| return task; |
| |
| // Sleep a bit and try again |
| ::usleep (usec_interval); |
| } |
| } |
| return TASK_NULL; |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // MachTask::BasicInfo |
| //---------------------------------------------------------------------- |
| kern_return_t |
| MachTask::BasicInfo(struct task_basic_info *info) |
| { |
| return BasicInfo (TaskPort(), info); |
| } |
| |
| //---------------------------------------------------------------------- |
| // MachTask::BasicInfo |
| //---------------------------------------------------------------------- |
| kern_return_t |
| MachTask::BasicInfo(task_t task, struct task_basic_info *info) |
| { |
| if (info == NULL) |
| return KERN_INVALID_ARGUMENT; |
| |
| DNBError err; |
| mach_msg_type_number_t count = TASK_BASIC_INFO_COUNT; |
| err = ::task_info (task, TASK_BASIC_INFO, (task_info_t)info, &count); |
| const bool log_process = DNBLogCheckLogBit(LOG_TASK); |
| if (log_process || err.Fail()) |
| err.LogThreaded("::task_info ( target_task = 0x%4.4x, flavor = TASK_BASIC_INFO, task_info_out => %p, task_info_outCnt => %u )", task, info, count); |
| if (DNBLogCheckLogBit(LOG_TASK) && DNBLogCheckLogBit(LOG_VERBOSE) && err.Success()) |
| { |
| float user = (float)info->user_time.seconds + (float)info->user_time.microseconds / 1000000.0f; |
| float system = (float)info->user_time.seconds + (float)info->user_time.microseconds / 1000000.0f; |
| DNBLogThreaded ("task_basic_info = { suspend_count = %i, virtual_size = 0x%8.8llx, resident_size = 0x%8.8llx, user_time = %f, system_time = %f }", |
| info->suspend_count, |
| (uint64_t)info->virtual_size, |
| (uint64_t)info->resident_size, |
| user, |
| system); |
| } |
| return err.Error(); |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // MachTask::IsValid |
| // |
| // Returns true if a task is a valid task port for a current process. |
| //---------------------------------------------------------------------- |
| bool |
| MachTask::IsValid () const |
| { |
| return MachTask::IsValid(TaskPort()); |
| } |
| |
| //---------------------------------------------------------------------- |
| // MachTask::IsValid |
| // |
| // Returns true if a task is a valid task port for a current process. |
| //---------------------------------------------------------------------- |
| bool |
| MachTask::IsValid (task_t task) |
| { |
| if (task != TASK_NULL) |
| { |
| struct task_basic_info task_info; |
| return BasicInfo(task, &task_info) == KERN_SUCCESS; |
| } |
| return false; |
| } |
| |
| |
| bool |
| MachTask::StartExceptionThread(DNBError &err) |
| { |
| DNBLogThreadedIf(LOG_EXCEPTIONS, "MachTask::%s ( )", __FUNCTION__); |
| task_t task = TaskPortForProcessID(err); |
| if (MachTask::IsValid(task)) |
| { |
| // Got the mach port for the current process |
| mach_port_t task_self = mach_task_self (); |
| |
| // Allocate an exception port that we will use to track our child process |
| err = ::mach_port_allocate (task_self, MACH_PORT_RIGHT_RECEIVE, &m_exception_port); |
| if (err.Fail()) |
| return false; |
| |
| // Add the ability to send messages on the new exception port |
| err = ::mach_port_insert_right (task_self, m_exception_port, m_exception_port, MACH_MSG_TYPE_MAKE_SEND); |
| if (err.Fail()) |
| return false; |
| |
| // Save the original state of the exception ports for our child process |
| SaveExceptionPortInfo(); |
| |
| // We weren't able to save the info for our exception ports, we must stop... |
| if (m_exc_port_info.mask == 0) |
| { |
| err.SetErrorString("failed to get exception port info"); |
| return false; |
| } |
| |
| // Set the ability to get all exceptions on this port |
| err = ::task_set_exception_ports (task, m_exc_port_info.mask, m_exception_port, EXCEPTION_DEFAULT | MACH_EXCEPTION_CODES, THREAD_STATE_NONE); |
| if (DNBLogCheckLogBit(LOG_EXCEPTIONS) || err.Fail()) |
| { |
| err.LogThreaded("::task_set_exception_ports ( task = 0x%4.4x, exception_mask = 0x%8.8x, new_port = 0x%4.4x, behavior = 0x%8.8x, new_flavor = 0x%8.8x )", |
| task, |
| m_exc_port_info.mask, |
| m_exception_port, |
| (EXCEPTION_DEFAULT | MACH_EXCEPTION_CODES), |
| THREAD_STATE_NONE); |
| } |
| |
| if (err.Fail()) |
| return false; |
| |
| // Create the exception thread |
| err = ::pthread_create (&m_exception_thread, NULL, MachTask::ExceptionThread, this); |
| return err.Success(); |
| } |
| else |
| { |
| DNBLogError("MachTask::%s (): task invalid, exception thread start failed.", __FUNCTION__); |
| } |
| return false; |
| } |
| |
| kern_return_t |
| MachTask::ShutDownExcecptionThread() |
| { |
| DNBError err; |
| |
| err = RestoreExceptionPortInfo(); |
| |
| // NULL our our exception port and let our exception thread exit |
| mach_port_t exception_port = m_exception_port; |
| m_exception_port = NULL; |
| |
| err.SetError(::pthread_cancel(m_exception_thread), DNBError::POSIX); |
| if (DNBLogCheckLogBit(LOG_TASK) || err.Fail()) |
| err.LogThreaded("::pthread_cancel ( thread = %p )", m_exception_thread); |
| |
| err.SetError(::pthread_join(m_exception_thread, NULL), DNBError::POSIX); |
| if (DNBLogCheckLogBit(LOG_TASK) || err.Fail()) |
| err.LogThreaded("::pthread_join ( thread = %p, value_ptr = NULL)", m_exception_thread); |
| |
| // Deallocate our exception port that we used to track our child process |
| mach_port_t task_self = mach_task_self (); |
| err = ::mach_port_deallocate (task_self, exception_port); |
| if (DNBLogCheckLogBit(LOG_TASK) || err.Fail()) |
| err.LogThreaded("::mach_port_deallocate ( task = 0x%4.4x, name = 0x%4.4x )", task_self, exception_port); |
| exception_port = NULL; |
| |
| return err.Error(); |
| } |
| |
| |
| void * |
| MachTask::ExceptionThread (void *arg) |
| { |
| if (arg == NULL) |
| return NULL; |
| |
| MachTask *mach_task = (MachTask*) arg; |
| MachProcess *mach_proc = mach_task->Process(); |
| DNBLogThreadedIf(LOG_EXCEPTIONS, "MachTask::%s ( arg = %p ) starting thread...", __FUNCTION__, arg); |
| |
| // We keep a count of the number of consecutive exceptions received so |
| // we know to grab all exceptions without a timeout. We do this to get a |
| // bunch of related exceptions on our exception port so we can process |
| // then together. When we have multiple threads, we can get an exception |
| // per thread and they will come in consecutively. The main loop in this |
| // thread can stop periodically if needed to service things related to this |
| // process. |
| // flag set in the options, so we will wait forever for an exception on |
| // our exception port. After we get one exception, we then will use the |
| // MACH_RCV_TIMEOUT option with a zero timeout to grab all other current |
| // exceptions for our process. After we have received the last pending |
| // exception, we will get a timeout which enables us to then notify |
| // our main thread that we have an exception bundle avaiable. We then wait |
| // for the main thread to tell this exception thread to start trying to get |
| // exceptions messages again and we start again with a mach_msg read with |
| // infinite timeout. |
| uint32_t num_exceptions_received = 0; |
| DNBError err; |
| task_t task = mach_task->TaskPort(); |
| mach_msg_timeout_t periodic_timeout = 0; |
| |
| #ifdef WITH_SPRINGBOARD |
| mach_msg_timeout_t watchdog_elapsed = 0; |
| mach_msg_timeout_t watchdog_timeout = 60 * 1000; |
| pid_t pid = mach_proc->ProcessID(); |
| CFReleaser<SBSWatchdogAssertionRef> watchdog; |
| |
| if (mach_proc->ProcessUsingSpringBoard()) |
| { |
| // Request a renewal for every 60 seconds if we attached using SpringBoard |
| watchdog.reset(::SBSWatchdogAssertionCreateForPID(NULL, pid, 60)); |
| DNBLogThreadedIf(LOG_TASK, "::SBSWatchdogAssertionCreateForPID (NULL, %4.4x, 60 ) => %p", pid, watchdog.get()); |
| |
| if (watchdog.get()) |
| { |
| ::SBSWatchdogAssertionRenew (watchdog.get()); |
| |
| CFTimeInterval watchdogRenewalInterval = ::SBSWatchdogAssertionGetRenewalInterval (watchdog.get()); |
| DNBLogThreadedIf(LOG_TASK, "::SBSWatchdogAssertionGetRenewalInterval ( %p ) => %g seconds", watchdog.get(), watchdogRenewalInterval); |
| if (watchdogRenewalInterval > 0.0) |
| { |
| watchdog_timeout = (mach_msg_timeout_t)watchdogRenewalInterval * 1000; |
| if (watchdog_timeout > 3000) |
| watchdog_timeout -= 1000; // Give us a second to renew our timeout |
| else if (watchdog_timeout > 1000) |
| watchdog_timeout -= 250; // Give us a quarter of a second to renew our timeout |
| } |
| } |
| if (periodic_timeout == 0 || periodic_timeout > watchdog_timeout) |
| periodic_timeout = watchdog_timeout; |
| } |
| #endif // #ifdef WITH_SPRINGBOARD |
| |
| while (mach_task->ExceptionPortIsValid()) |
| { |
| ::pthread_testcancel (); |
| |
| MachException::Message exception_message; |
| |
| |
| if (num_exceptions_received > 0) |
| { |
| // No timeout, just receive as many exceptions as we can since we already have one and we want |
| // to get all currently available exceptions for this task |
| err = exception_message.Receive(mach_task->ExceptionPort(), MACH_RCV_MSG | MACH_RCV_INTERRUPT | MACH_RCV_TIMEOUT, 0); |
| } |
| else if (periodic_timeout > 0) |
| { |
| // We need to stop periodically in this loop, so try and get a mach message with a valid timeout (ms) |
| err = exception_message.Receive(mach_task->ExceptionPort(), MACH_RCV_MSG | MACH_RCV_INTERRUPT | MACH_RCV_TIMEOUT, periodic_timeout); |
| } |
| else |
| { |
| // We don't need to parse all current exceptions or stop periodically, |
| // just wait for an exception forever. |
| err = exception_message.Receive(mach_task->ExceptionPort(), MACH_RCV_MSG | MACH_RCV_INTERRUPT, 0); |
| } |
| |
| if (err.Error() == MACH_RCV_INTERRUPTED) |
| { |
| // If we have no task port we should exit this thread |
| if (!mach_task->ExceptionPortIsValid()) |
| { |
| DNBLogThreadedIf(LOG_EXCEPTIONS, "thread cancelled..."); |
| break; |
| } |
| |
| // Make sure our task is still valid |
| if (MachTask::IsValid(task)) |
| { |
| // Task is still ok |
| DNBLogThreadedIf(LOG_EXCEPTIONS, "interrupted, but task still valid, continuing..."); |
| continue; |
| } |
| else |
| { |
| DNBLogThreadedIf(LOG_EXCEPTIONS, "task has exited..."); |
| mach_proc->SetState(eStateExited); |
| // Our task has died, exit the thread. |
| break; |
| } |
| } |
| else if (err.Error() == MACH_RCV_TIMED_OUT) |
| { |
| if (num_exceptions_received > 0) |
| { |
| // We were receiving all current exceptions with a timeout of zero |
| // it is time to go back to our normal looping mode |
| num_exceptions_received = 0; |
| |
| // Notify our main thread we have a complete exception message |
| // bundle available. |
| mach_proc->ExceptionMessageBundleComplete(); |
| |
| // in case we use a timeout value when getting exceptions... |
| // Make sure our task is still valid |
| if (MachTask::IsValid(task)) |
| { |
| // Task is still ok |
| DNBLogThreadedIf(LOG_EXCEPTIONS, "got a timeout, continuing..."); |
| continue; |
| } |
| else |
| { |
| DNBLogThreadedIf(LOG_EXCEPTIONS, "task has exited..."); |
| mach_proc->SetState(eStateExited); |
| // Our task has died, exit the thread. |
| break; |
| } |
| continue; |
| } |
| |
| #ifdef WITH_SPRINGBOARD |
| if (watchdog.get()) |
| { |
| watchdog_elapsed += periodic_timeout; |
| if (watchdog_elapsed >= watchdog_timeout) |
| { |
| DNBLogThreadedIf(LOG_TASK, "SBSWatchdogAssertionRenew ( %p )", watchdog.get()); |
| ::SBSWatchdogAssertionRenew (watchdog.get()); |
| watchdog_elapsed = 0; |
| } |
| } |
| #endif |
| } |
| else if (err.Error() != KERN_SUCCESS) |
| { |
| DNBLogThreadedIf(LOG_EXCEPTIONS, "got some other error, do something about it??? nah, continuing for now..."); |
| // TODO: notify of error? |
| } |
| else |
| { |
| if (exception_message.CatchExceptionRaise(task)) |
| { |
| ++num_exceptions_received; |
| mach_proc->ExceptionMessageReceived(exception_message); |
| } |
| } |
| } |
| |
| #ifdef WITH_SPRINGBOARD |
| if (watchdog.get()) |
| { |
| // TODO: change SBSWatchdogAssertionRelease to SBSWatchdogAssertionCancel when we |
| // all are up and running on systems that support it. The SBS framework has a #define |
| // that will forward SBSWatchdogAssertionRelease to SBSWatchdogAssertionCancel for now |
| // so it should still build either way. |
| DNBLogThreadedIf(LOG_TASK, "::SBSWatchdogAssertionRelease(%p)", watchdog.get()); |
| ::SBSWatchdogAssertionRelease (watchdog.get()); |
| } |
| #endif // #ifdef WITH_SPRINGBOARD |
| |
| DNBLogThreadedIf(LOG_EXCEPTIONS, "MachTask::%s (%p): thread exiting...", __FUNCTION__, arg); |
| return NULL; |
| } |
| |
| |
| // So the TASK_DYLD_INFO used to just return the address of the all image infos |
| // as a single member called "all_image_info". Then someone decided it would be |
| // a good idea to rename this first member to "all_image_info_addr" and add a |
| // size member called "all_image_info_size". This of course can not be detected |
| // using code or #defines. So to hack around this problem, we define our own |
| // version of the TASK_DYLD_INFO structure so we can guarantee what is inside it. |
| |
| struct hack_task_dyld_info { |
| mach_vm_address_t all_image_info_addr; |
| mach_vm_size_t all_image_info_size; |
| }; |
| |
| nub_addr_t |
| MachTask::GetDYLDAllImageInfosAddress (DNBError& err) |
| { |
| struct hack_task_dyld_info dyld_info; |
| mach_msg_type_number_t count = TASK_DYLD_INFO_COUNT; |
| // Make sure that COUNT isn't bigger than our hacked up struct hack_task_dyld_info. |
| // If it is, then make COUNT smaller to match. |
| if (count > (sizeof(struct hack_task_dyld_info) / sizeof(natural_t))) |
| count = (sizeof(struct hack_task_dyld_info) / sizeof(natural_t)); |
| |
| task_t task = TaskPortForProcessID (err); |
| if (err.Success()) |
| { |
| err = ::task_info (task, TASK_DYLD_INFO, (task_info_t)&dyld_info, &count); |
| if (err.Success()) |
| { |
| // We now have the address of the all image infos structure |
| return dyld_info.all_image_info_addr; |
| } |
| } |
| return INVALID_NUB_ADDRESS; |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // MachTask::AllocateMemory |
| //---------------------------------------------------------------------- |
| nub_addr_t |
| MachTask::AllocateMemory (size_t size, uint32_t permissions) |
| { |
| mach_vm_address_t addr; |
| task_t task = TaskPort(); |
| if (task == TASK_NULL) |
| return INVALID_NUB_ADDRESS; |
| |
| DNBError err; |
| err = ::mach_vm_allocate (task, &addr, size, TRUE); |
| if (err.Error() == KERN_SUCCESS) |
| { |
| // Set the protections: |
| vm_prot_t mach_prot = VM_PROT_NONE; |
| if (permissions & eMemoryPermissionsReadable) |
| mach_prot |= VM_PROT_READ; |
| if (permissions & eMemoryPermissionsWritable) |
| mach_prot |= VM_PROT_WRITE; |
| if (permissions & eMemoryPermissionsExecutable) |
| mach_prot |= VM_PROT_EXECUTE; |
| |
| |
| err = ::mach_vm_protect (task, addr, size, 0, mach_prot); |
| if (err.Error() == KERN_SUCCESS) |
| { |
| m_allocations.insert (std::make_pair(addr, size)); |
| return addr; |
| } |
| ::mach_vm_deallocate (task, addr, size); |
| } |
| return INVALID_NUB_ADDRESS; |
| } |
| |
| //---------------------------------------------------------------------- |
| // MachTask::DeallocateMemory |
| //---------------------------------------------------------------------- |
| nub_bool_t |
| MachTask::DeallocateMemory (nub_addr_t addr) |
| { |
| task_t task = TaskPort(); |
| if (task == TASK_NULL) |
| return false; |
| |
| // We have to stash away sizes for the allocations... |
| allocation_collection::iterator pos, end = m_allocations.end(); |
| for (pos = m_allocations.begin(); pos != end; pos++) |
| { |
| if ((*pos).first == addr) |
| { |
| m_allocations.erase(pos); |
| #define ALWAYS_ZOMBIE_ALLOCATIONS 0 |
| if (ALWAYS_ZOMBIE_ALLOCATIONS || getenv ("DEBUGSERVER_ZOMBIE_ALLOCATIONS")) |
| { |
| ::mach_vm_protect (task, (*pos).first, (*pos).second, 0, VM_PROT_NONE); |
| return true; |
| } |
| else |
| return ::mach_vm_deallocate (task, (*pos).first, (*pos).second) == KERN_SUCCESS; |
| } |
| |
| } |
| return false; |
| } |
| |
| static void foundStackLog(mach_stack_logging_record_t record, void *context) { |
| *((bool*)context) = true; |
| } |
| |
| bool |
| MachTask::HasMallocLoggingEnabled () |
| { |
| bool found = false; |
| |
| __mach_stack_logging_enumerate_records(m_task, 0x0, foundStackLog, &found); |
| return found; |
| } |
| |
| struct history_enumerator_impl_data |
| { |
| MachMallocEvent *buffer; |
| uint32_t *position; |
| uint32_t count; |
| }; |
| |
| static void history_enumerator_impl(mach_stack_logging_record_t record, void* enum_obj) |
| { |
| history_enumerator_impl_data *data = (history_enumerator_impl_data*)enum_obj; |
| |
| if (*data->position >= data->count) |
| return; |
| |
| data->buffer[*data->position].m_base_address = record.address; |
| data->buffer[*data->position].m_size = record.argument; |
| data->buffer[*data->position].m_event_id = record.stack_identifier; |
| data->buffer[*data->position].m_event_type = record.type_flags == stack_logging_type_alloc ? eMachMallocEventTypeAlloc : |
| record.type_flags == stack_logging_type_dealloc ? eMachMallocEventTypeDealloc : |
| eMachMallocEventTypeOther; |
| *data->position+=1; |
| } |
| |
| bool |
| MachTask::EnumerateMallocRecords (MachMallocEvent *event_buffer, |
| uint32_t buffer_size, |
| uint32_t *count) |
| { |
| return EnumerateMallocRecords(0, |
| event_buffer, |
| buffer_size, |
| count); |
| } |
| |
| bool |
| MachTask::EnumerateMallocRecords (mach_vm_address_t address, |
| MachMallocEvent *event_buffer, |
| uint32_t buffer_size, |
| uint32_t *count) |
| { |
| if (!event_buffer || !count) |
| return false; |
| |
| if (buffer_size == 0) |
| return false; |
| |
| *count = 0; |
| history_enumerator_impl_data data = { event_buffer, count, buffer_size }; |
| __mach_stack_logging_enumerate_records(m_task, address, history_enumerator_impl, &data); |
| return (*count > 0); |
| } |
| |
| bool |
| MachTask::EnumerateMallocFrames (MachMallocEventId event_id, |
| mach_vm_address_t *function_addresses_buffer, |
| uint32_t buffer_size, |
| uint32_t *count) |
| { |
| if (!function_addresses_buffer || !count) |
| return false; |
| |
| if (buffer_size == 0) |
| return false; |
| |
| __mach_stack_logging_frames_for_uniqued_stack(m_task, event_id, &function_addresses_buffer[0], buffer_size, count); |
| *count -= 1; |
| if (function_addresses_buffer[*count-1] < vm_page_size) |
| *count -= 1; |
| return (*count > 0); |
| } |
