788 lines
16 KiB
C
788 lines
16 KiB
C
/**
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* WinPR: Windows Portable Runtime
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* Process Thread Functions
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*
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* Copyright 2012 Marc-Andre Moreau <marcandre.moreau@gmail.com>
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* Copyright 2015 Hewlett-Packard Development Company, L.P.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <assert.h>
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#include <winpr/handle.h>
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#include <winpr/thread.h>
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/**
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* api-ms-win-core-processthreads-l1-1-1.dll
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*
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* CreateRemoteThread
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* CreateRemoteThreadEx
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* CreateThread
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* DeleteProcThreadAttributeList
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* ExitThread
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* FlushInstructionCache
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* FlushProcessWriteBuffers
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* GetCurrentThread
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* GetCurrentThreadId
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* GetCurrentThreadStackLimits
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* GetExitCodeThread
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* GetPriorityClass
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* GetStartupInfoW
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* GetThreadContext
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* GetThreadId
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* GetThreadIdealProcessorEx
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* GetThreadPriority
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* GetThreadPriorityBoost
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* GetThreadTimes
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* InitializeProcThreadAttributeList
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* OpenThread
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* OpenThreadToken
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* QueryProcessAffinityUpdateMode
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* QueueUserAPC
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* ResumeThread
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* SetPriorityClass
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* SetThreadContext
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* SetThreadPriority
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* SetThreadPriorityBoost
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* SetThreadStackGuarantee
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* SetThreadToken
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* SuspendThread
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* SwitchToThread
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* TerminateThread
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* UpdateProcThreadAttribute
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*/
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#ifndef _WIN32
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#include <winpr/crt.h>
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#include <winpr/platform.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_EVENTFD_H
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#include <sys/eventfd.h>
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#endif
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#include <winpr/debug.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <winpr/collections.h>
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#include "thread.h"
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#include "../handle/handle.h"
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#include "../log.h"
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#define TAG WINPR_TAG("thread")
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static wListDictionary* thread_list = NULL;
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static BOOL ThreadCloseHandle(HANDLE handle);
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static void cleanup_handle(void* obj);
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static BOOL ThreadIsHandled(HANDLE handle)
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{
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WINPR_THREAD* pThread = (WINPR_THREAD*) handle;
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if (!pThread || (pThread->Type != HANDLE_TYPE_THREAD))
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{
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SetLastError(ERROR_INVALID_HANDLE);
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return FALSE;
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}
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return TRUE;
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}
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static int ThreadGetFd(HANDLE handle)
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{
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WINPR_THREAD* pThread = (WINPR_THREAD*) handle;
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if (!ThreadIsHandled(handle))
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return -1;
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return pThread->pipe_fd[0];
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}
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static DWORD ThreadCleanupHandle(HANDLE handle)
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{
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WINPR_THREAD* thread = (WINPR_THREAD*) handle;
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if (!ThreadIsHandled(handle))
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return WAIT_FAILED;
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pthread_mutex_lock(&thread->mutex);
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if (!thread->joined)
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{
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int status;
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status = pthread_join(thread->thread, NULL);
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if (status != 0)
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{
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WLog_ERR(TAG, "pthread_join failure: [%d] %s",
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status, strerror(status));
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pthread_mutex_unlock(&thread->mutex);
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return WAIT_FAILED;
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}
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else
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thread->joined = TRUE;
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}
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pthread_mutex_unlock(&thread->mutex);
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return WAIT_OBJECT_0;
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}
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static HANDLE_OPS ops = {
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ThreadIsHandled,
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ThreadCloseHandle,
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ThreadGetFd,
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ThreadCleanupHandle
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};
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static void dump_thread(WINPR_THREAD* thread)
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{
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#if defined(WITH_DEBUG_THREADS)
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void* stack = winpr_backtrace(20);
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char** msg;
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size_t used, i;
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WLog_DBG(TAG, "Called from:");
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msg = winpr_backtrace_symbols(stack, &used);
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for (i = 0; i < used; i++)
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WLog_DBG(TAG, "[%d]: %s", i, msg[i]);
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free(msg);
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winpr_backtrace_free(stack);
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WLog_DBG(TAG, "Thread handle created still not closed!");
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msg = winpr_backtrace_symbols(thread->create_stack, &used);
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for (i = 0; i < used; i++)
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WLog_DBG(TAG, "[%d]: %s", i, msg[i]);
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free(msg);
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if (thread->started)
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{
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WLog_DBG(TAG, "Thread still running!");
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}
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else if (!thread->exit_stack)
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{
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WLog_DBG(TAG, "Thread suspended.");
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}
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else
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{
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WLog_DBG(TAG, "Thread exited at:");
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msg = winpr_backtrace_symbols(thread->exit_stack, &used);
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for (i = 0; i < used; i++)
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WLog_DBG(TAG, "[%d]: %s", i, msg[i]);
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free(msg);
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}
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#endif
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}
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/**
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* TODO: implement thread suspend/resume using pthreads
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* http://stackoverflow.com/questions/3140867/suspend-pthreads-without-using-condition
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*/
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static BOOL set_event(WINPR_THREAD *thread)
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{
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int length;
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BOOL status = FALSE;
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#ifdef HAVE_EVENTFD_H
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eventfd_t val = 1;
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do
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{
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length = eventfd_write(thread->pipe_fd[0], val);
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}
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while ((length < 0) && (errno == EINTR));
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status = (length == 0) ? TRUE : FALSE;
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#else
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if (WaitForSingleObject(thread, 0) != WAIT_OBJECT_0)
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{
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length = write(thread->pipe_fd[1], "-", 1);
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if (length == 1)
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status = TRUE;
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}
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else
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{
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status = TRUE;
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}
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#endif
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return status;
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}
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static BOOL reset_event(WINPR_THREAD *thread)
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{
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int length;
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BOOL status = FALSE;
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#ifdef HAVE_EVENTFD_H
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eventfd_t value;
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do
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{
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length = eventfd_read(thread->pipe_fd[0], &value);
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}
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while ((length < 0) && (errno == EINTR));
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if ((length > 0) && (!status))
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status = TRUE;
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#else
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length = read(thread->pipe_fd[0], &length, 1);
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if ((length == 1) && (!status))
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status = TRUE;
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#endif
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return status;
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}
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static BOOL thread_compare(void* a, void* b)
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{
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pthread_t* p1 = a;
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pthread_t* p2 = b;
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BOOL rc = pthread_equal(*p1, *p2);
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return rc;
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}
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/* Thread launcher function responsible for registering
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* cleanup handlers and calling pthread_exit, if not done
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* in thread function. */
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static void* thread_launcher(void* arg)
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{
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DWORD res = -1;
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void* rc = NULL;
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WINPR_THREAD* thread = (WINPR_THREAD*) arg;
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if (!thread)
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{
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WLog_ERR(TAG, "Called with invalid argument %p", arg);
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goto exit;
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}
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else
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{
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void *(*fkt)(void*) = (void*) thread->lpStartAddress;
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if (!fkt)
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{
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WLog_ERR(TAG, "Thread function argument is %p", fkt);
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goto exit;
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}
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pthread_mutex_lock(&thread->threadIsReadyMutex);
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if (!ListDictionary_Contains(thread_list, &thread->thread))
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{
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if (pthread_cond_wait(&thread->threadIsReady, &thread->threadIsReadyMutex) != 0)
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{
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WLog_ERR(TAG, "The thread could not be made ready");
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pthread_mutex_unlock(&thread->threadIsReadyMutex);
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goto exit;
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}
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}
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pthread_mutex_unlock(&thread->threadIsReadyMutex);
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assert(ListDictionary_Contains(thread_list, &thread->thread));
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rc = fkt(thread->lpParameter);
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}
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exit:
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if (thread)
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{
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if (!thread->exited)
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thread->dwExitCode = (DWORD)(size_t)rc;
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set_event(thread);
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res = thread->dwExitCode;
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if (thread->detached || !thread->started)
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cleanup_handle(thread);
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}
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pthread_exit((void*) (size_t) res);
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return rc;
|
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}
|
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static BOOL winpr_StartThread(WINPR_THREAD *thread)
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{
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pthread_attr_t attr;
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pthread_attr_init(&attr);
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pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
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|
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if (thread->dwStackSize > 0)
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pthread_attr_setstacksize(&attr, (size_t) thread->dwStackSize);
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|
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thread->started = TRUE;
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reset_event(thread);
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|
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if (pthread_create(&thread->thread, &attr, thread_launcher, thread))
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goto error;
|
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|
|
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pthread_mutex_lock(&thread->threadIsReadyMutex);
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if (!ListDictionary_Add(thread_list, &thread->thread, thread))
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{
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WLog_ERR(TAG, "failed to add the thread to the thread list");
|
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goto error;
|
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}
|
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if (pthread_cond_signal(&thread->threadIsReady) != 0)
|
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{
|
|
WLog_ERR(TAG, "failed to signal the thread was ready");
|
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pthread_mutex_unlock(&thread->threadIsReadyMutex);
|
|
goto error;
|
|
}
|
|
pthread_mutex_unlock(&thread->threadIsReadyMutex);
|
|
|
|
pthread_attr_destroy(&attr);
|
|
dump_thread(thread);
|
|
return TRUE;
|
|
|
|
error:
|
|
pthread_attr_destroy(&attr);
|
|
return FALSE;
|
|
}
|
|
|
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HANDLE CreateThread(LPSECURITY_ATTRIBUTES lpThreadAttributes, SIZE_T dwStackSize,
|
|
LPTHREAD_START_ROUTINE lpStartAddress, LPVOID lpParameter, DWORD dwCreationFlags, LPDWORD lpThreadId)
|
|
{
|
|
HANDLE handle;
|
|
WINPR_THREAD* thread;
|
|
|
|
thread = (WINPR_THREAD*) calloc(1, sizeof(WINPR_THREAD));
|
|
|
|
if (!thread)
|
|
return NULL;
|
|
|
|
thread->dwStackSize = dwStackSize;
|
|
thread->lpParameter = lpParameter;
|
|
thread->lpStartAddress = lpStartAddress;
|
|
thread->lpThreadAttributes = lpThreadAttributes;
|
|
thread->ops = &ops;
|
|
|
|
#if defined(WITH_DEBUG_THREADS)
|
|
thread->create_stack = winpr_backtrace(20);
|
|
dump_thread(thread);
|
|
#endif
|
|
thread->pipe_fd[0] = -1;
|
|
thread->pipe_fd[1] = -1;
|
|
|
|
#ifdef HAVE_EVENTFD_H
|
|
thread->pipe_fd[0] = eventfd(0, EFD_NONBLOCK);
|
|
|
|
if (thread->pipe_fd[0] < 0)
|
|
{
|
|
WLog_ERR(TAG, "failed to create thread pipe fd 0");
|
|
goto error_pipefd0;
|
|
}
|
|
#else
|
|
if (pipe(thread->pipe_fd) < 0)
|
|
{
|
|
WLog_ERR(TAG, "failed to create thread pipe");
|
|
goto error_pipefd0;
|
|
}
|
|
|
|
{
|
|
int flags = fcntl(thread->pipe_fd[0], F_GETFL);
|
|
fcntl(thread->pipe_fd[0], F_SETFL, flags | O_NONBLOCK);
|
|
}
|
|
#endif
|
|
|
|
if(pthread_mutex_init(&thread->mutex, 0) != 0)
|
|
{
|
|
WLog_ERR(TAG, "failed to initialize thread mutex");
|
|
goto error_mutex;
|
|
}
|
|
|
|
if (pthread_mutex_init(&thread->threadIsReadyMutex, NULL) != 0)
|
|
{
|
|
WLog_ERR(TAG, "failed to initialize a mutex for a condition variable");
|
|
goto error_thread_ready_mutex;
|
|
}
|
|
|
|
if (pthread_cond_init(&thread->threadIsReady, NULL) != 0)
|
|
{
|
|
WLog_ERR(TAG, "failed to initialize a condition variable");
|
|
goto error_thread_ready;
|
|
}
|
|
|
|
WINPR_HANDLE_SET_TYPE_AND_MODE(thread, HANDLE_TYPE_THREAD, FD_READ);
|
|
handle = (HANDLE) thread;
|
|
|
|
if (!thread_list)
|
|
{
|
|
thread_list = ListDictionary_New(TRUE);
|
|
if (!thread_list)
|
|
{
|
|
WLog_ERR(TAG, "Couldn't create global thread list");
|
|
goto error_thread_list;
|
|
}
|
|
thread_list->objectKey.fnObjectEquals = thread_compare;
|
|
}
|
|
|
|
if (!(dwCreationFlags & CREATE_SUSPENDED))
|
|
{
|
|
if (!winpr_StartThread(thread))
|
|
goto error_thread_list;
|
|
}
|
|
else
|
|
{
|
|
if (!set_event(thread))
|
|
goto error_thread_list;
|
|
}
|
|
|
|
return handle;
|
|
|
|
error_thread_list:
|
|
pthread_cond_destroy(&thread->threadIsReady);
|
|
error_thread_ready:
|
|
pthread_mutex_destroy(&thread->threadIsReadyMutex);
|
|
error_thread_ready_mutex:
|
|
pthread_mutex_destroy(&thread->mutex);
|
|
error_mutex:
|
|
if (thread->pipe_fd[1] >= 0)
|
|
close(thread->pipe_fd[1]);
|
|
if (thread->pipe_fd[0] >= 0)
|
|
close(thread->pipe_fd[0]);
|
|
error_pipefd0:
|
|
free(thread);
|
|
return NULL;
|
|
}
|
|
|
|
void cleanup_handle(void *obj)
|
|
{
|
|
int rc;
|
|
WINPR_THREAD* thread = (WINPR_THREAD*) obj;
|
|
|
|
|
|
rc = pthread_cond_destroy(&thread->threadIsReady);
|
|
if (rc)
|
|
WLog_ERR(TAG, "failed to destroy a condition variable [%d] %s (%d)",
|
|
rc, strerror(errno), errno);
|
|
|
|
rc = pthread_mutex_destroy(&thread->threadIsReadyMutex);
|
|
if (rc)
|
|
WLog_ERR(TAG, "failed to destroy a condition variable mutex [%d] %s (%d)",
|
|
rc, strerror(errno), errno);
|
|
|
|
rc = pthread_mutex_destroy(&thread->mutex);
|
|
if (rc)
|
|
WLog_ERR(TAG, "failed to destroy mutex [%d] %s (%d)",
|
|
rc, strerror(errno), errno);
|
|
|
|
if (thread->pipe_fd[0])
|
|
close(thread->pipe_fd[0]);
|
|
|
|
if (thread->pipe_fd[1])
|
|
close(thread->pipe_fd[1]);
|
|
|
|
if (thread_list && ListDictionary_Contains(thread_list, &thread->thread))
|
|
ListDictionary_Remove(thread_list, &thread->thread);
|
|
|
|
#if defined(WITH_DEBUG_THREADS)
|
|
|
|
if (thread->create_stack)
|
|
winpr_backtrace_free(thread->create_stack);
|
|
|
|
if (thread->exit_stack)
|
|
winpr_backtrace_free(thread->exit_stack);
|
|
|
|
#endif
|
|
free(thread);
|
|
}
|
|
|
|
BOOL ThreadCloseHandle(HANDLE handle)
|
|
{
|
|
WINPR_THREAD* thread = (WINPR_THREAD*) handle;
|
|
|
|
if (!thread_list)
|
|
{
|
|
WLog_ERR(TAG, "Thread list does not exist, check call!");
|
|
dump_thread(thread);
|
|
}
|
|
else if (!ListDictionary_Contains(thread_list, &thread->thread))
|
|
{
|
|
WLog_ERR(TAG, "Thread list does not contain this thread! check call!");
|
|
dump_thread(thread);
|
|
}
|
|
else
|
|
{
|
|
ListDictionary_Lock(thread_list);
|
|
dump_thread(thread);
|
|
|
|
if ((thread->started) && (WaitForSingleObject(thread, 0) != WAIT_OBJECT_0))
|
|
{
|
|
WLog_ERR(TAG, "Thread running, setting to detached state!");
|
|
thread->detached = TRUE;
|
|
pthread_detach(thread->thread);
|
|
}
|
|
else
|
|
{
|
|
cleanup_handle(thread);
|
|
}
|
|
|
|
ListDictionary_Unlock(thread_list);
|
|
|
|
if (ListDictionary_Count(thread_list) < 1)
|
|
{
|
|
ListDictionary_Free(thread_list);
|
|
thread_list = NULL;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
HANDLE CreateRemoteThread(HANDLE hProcess, LPSECURITY_ATTRIBUTES lpThreadAttributes, SIZE_T dwStackSize,
|
|
LPTHREAD_START_ROUTINE lpStartAddress, LPVOID lpParameter, DWORD dwCreationFlags, LPDWORD lpThreadId)
|
|
{
|
|
WLog_ERR(TAG, "not implemented");
|
|
return NULL;
|
|
}
|
|
|
|
VOID ExitThread(DWORD dwExitCode)
|
|
{
|
|
DWORD rc;
|
|
pthread_t tid = pthread_self();
|
|
|
|
if (!thread_list)
|
|
{
|
|
WLog_ERR(TAG, "function called without existing thread list!");
|
|
#if defined(WITH_DEBUG_THREADS)
|
|
DumpThreadHandles();
|
|
#endif
|
|
pthread_exit(0);
|
|
}
|
|
else if (!ListDictionary_Contains(thread_list, &tid))
|
|
{
|
|
WLog_ERR(TAG, "function called, but no matching entry in thread list!");
|
|
#if defined(WITH_DEBUG_THREADS)
|
|
DumpThreadHandles();
|
|
#endif
|
|
pthread_exit(0);
|
|
}
|
|
else
|
|
{
|
|
WINPR_THREAD* thread;
|
|
|
|
ListDictionary_Lock(thread_list);
|
|
thread = ListDictionary_GetItemValue(thread_list, &tid);
|
|
|
|
assert(thread);
|
|
thread->exited = TRUE;
|
|
thread->dwExitCode = dwExitCode;
|
|
#if defined(WITH_DEBUG_THREADS)
|
|
thread->exit_stack = winpr_backtrace(20);
|
|
#endif
|
|
ListDictionary_Unlock(thread_list);
|
|
set_event(thread);
|
|
|
|
rc = thread->dwExitCode;
|
|
if (thread->detached || !thread->started)
|
|
cleanup_handle(thread);
|
|
|
|
pthread_exit((void*) (size_t) rc);
|
|
}
|
|
}
|
|
|
|
BOOL GetExitCodeThread(HANDLE hThread, LPDWORD lpExitCode)
|
|
{
|
|
ULONG Type;
|
|
WINPR_HANDLE* Object;
|
|
WINPR_THREAD* thread;
|
|
|
|
if (!winpr_Handle_GetInfo(hThread, &Type, &Object))
|
|
return FALSE;
|
|
|
|
thread = (WINPR_THREAD*) Object;
|
|
*lpExitCode = thread->dwExitCode;
|
|
return TRUE;
|
|
}
|
|
|
|
HANDLE _GetCurrentThread(VOID)
|
|
{
|
|
HANDLE hdl = NULL;
|
|
pthread_t tid = pthread_self();
|
|
|
|
if (!thread_list)
|
|
{
|
|
WLog_ERR(TAG, "function called without existing thread list!");
|
|
#if defined(WITH_DEBUG_THREADS)
|
|
DumpThreadHandles();
|
|
#endif
|
|
}
|
|
else if (!ListDictionary_Contains(thread_list, &tid))
|
|
{
|
|
WLog_ERR(TAG, "function called, but no matching entry in thread list!");
|
|
#if defined(WITH_DEBUG_THREADS)
|
|
DumpThreadHandles();
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
hdl = ListDictionary_GetItemValue(thread_list, &tid);
|
|
}
|
|
|
|
return hdl;
|
|
}
|
|
|
|
DWORD GetCurrentThreadId(VOID)
|
|
{
|
|
pthread_t tid;
|
|
tid = pthread_self();
|
|
|
|
/* Since pthread_t can be 64-bits on some systems, take just the */
|
|
/* lower 32-bits of it for the thread ID returned by this function. */
|
|
tid = (long)tid & 0xffffffff;
|
|
return (DWORD) tid;
|
|
}
|
|
|
|
DWORD ResumeThread(HANDLE hThread)
|
|
{
|
|
ULONG Type;
|
|
WINPR_HANDLE* Object;
|
|
WINPR_THREAD* thread;
|
|
|
|
if (!winpr_Handle_GetInfo(hThread, &Type, &Object))
|
|
return 0;
|
|
|
|
thread = (WINPR_THREAD*) Object;
|
|
pthread_mutex_lock(&thread->mutex);
|
|
|
|
if (!thread->started)
|
|
winpr_StartThread(thread);
|
|
else
|
|
WLog_WARN(TAG, "Thread already started!");
|
|
|
|
pthread_mutex_unlock(&thread->mutex);
|
|
return 0;
|
|
}
|
|
|
|
DWORD SuspendThread(HANDLE hThread)
|
|
{
|
|
WLog_ERR(TAG, "Function not implemented!");
|
|
return 0;
|
|
}
|
|
|
|
BOOL SwitchToThread(VOID)
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
BOOL TerminateThread(HANDLE hThread, DWORD dwExitCode)
|
|
{
|
|
ULONG Type;
|
|
WINPR_HANDLE* Object;
|
|
WINPR_THREAD* thread;
|
|
|
|
if (!winpr_Handle_GetInfo(hThread, &Type, &Object))
|
|
return 0;
|
|
|
|
thread = (WINPR_THREAD*) Object;
|
|
thread->exited = TRUE;
|
|
thread->dwExitCode = dwExitCode;
|
|
pthread_mutex_lock(&thread->mutex);
|
|
#ifndef ANDROID
|
|
pthread_cancel(thread->thread);
|
|
#else
|
|
WLog_ERR(TAG, "Function not supported on this platform!");
|
|
#endif
|
|
pthread_mutex_unlock(&thread->mutex);
|
|
set_event(thread);
|
|
return TRUE;
|
|
}
|
|
|
|
#if defined(WITH_DEBUG_THREADS)
|
|
VOID DumpThreadHandles(void)
|
|
{
|
|
char** msg;
|
|
size_t used, i;
|
|
void* stack = winpr_backtrace(20);
|
|
WLog_DBG(TAG, "---------------- Called from ----------------------------");
|
|
msg = winpr_backtrace_symbols(stack, &used);
|
|
|
|
for (i = 0; i < used; i++)
|
|
{
|
|
WLog_DBG(TAG, "[%d]: %s", i, msg[i]);
|
|
}
|
|
|
|
free(msg);
|
|
winpr_backtrace_free(stack);
|
|
WLog_DBG(TAG, "---------------- Start Dumping thread handles -----------");
|
|
|
|
if (!thread_list)
|
|
{
|
|
WLog_DBG(TAG, "All threads properly shut down and disposed of.");
|
|
}
|
|
else
|
|
{
|
|
ULONG_PTR *keys = NULL;
|
|
ListDictionary_Lock(thread_list);
|
|
int x, count = ListDictionary_GetKeys(thread_list, &keys);
|
|
WLog_DBG(TAG, "Dumping %d elements", count);
|
|
|
|
for (x = 0; x < count; x++)
|
|
{
|
|
WINPR_THREAD* thread = ListDictionary_GetItemValue(thread_list, (void*) keys[x]);
|
|
WLog_DBG(TAG, "Thread [%d] handle created still not closed!", x);
|
|
msg = winpr_backtrace_symbols(thread->create_stack, &used);
|
|
|
|
for (i = 0; i < used; i++)
|
|
{
|
|
WLog_DBG(TAG, "[%d]: %s", i, msg[i]);
|
|
}
|
|
|
|
free(msg);
|
|
|
|
if (thread->started)
|
|
{
|
|
WLog_DBG(TAG, "Thread [%d] still running!", x);
|
|
}
|
|
else
|
|
{
|
|
WLog_DBG(TAG, "Thread [%d] exited at:", x);
|
|
msg = winpr_backtrace_symbols(thread->exit_stack, &used);
|
|
|
|
for (i=0; i<used; i++)
|
|
WLog_DBG(TAG, "[%d]: %s", i, msg[i]);
|
|
|
|
free(msg);
|
|
}
|
|
}
|
|
|
|
free(keys);
|
|
|
|
ListDictionary_Unlock(thread_list);
|
|
}
|
|
|
|
WLog_DBG(TAG, "---------------- End Dumping thread handles -------------");
|
|
}
|
|
#endif
|
|
#endif
|
|
|