zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/build/uClibc/libpthread/linuxthreads.old/pthread.c b/ap/build/uClibc/libpthread/linuxthreads.old/pthread.c
new file mode 100644
index 0000000..42e03f4
--- /dev/null
+++ b/ap/build/uClibc/libpthread/linuxthreads.old/pthread.c
@@ -0,0 +1,1167 @@
+/* Linuxthreads - a simple clone()-based implementation of Posix */
+/* threads for Linux. */
+/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */
+/* */
+/* This program is free software; you can redistribute it and/or */
+/* modify it under the terms of the GNU Library General Public License */
+/* as published by the Free Software Foundation; either version 2 */
+/* of the License, or (at your option) any later version. */
+/* */
+/* This program is distributed in the hope that it will be useful, */
+/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
+/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
+/* GNU Library General Public License for more details. */
+
+/* Thread creation, initialization, and basic low-level routines */
+
+#define __FORCE_GLIBC
+#include <features.h>
+#include <errno.h>
+#include <netdb.h> /* for h_errno */
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/wait.h>
+#include <sys/resource.h>
+#include "pthread.h"
+#include "internals.h"
+#include "spinlock.h"
+#include "restart.h"
+#include "debug.h" /* added to linuxthreads -StS */
+
+
+/* Mods for uClibc: Some includes */
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/syscall.h>
+
+/* mods for uClibc: __libc_sigaction is not in any standard headers */
+extern __typeof(sigaction) __libc_sigaction;
+libpthread_hidden_proto(waitpid)
+libpthread_hidden_proto(raise)
+
+/* These variables are used by the setup code. */
+extern int _errno;
+extern int _h_errno;
+
+
+/* Descriptor of the initial thread */
+
+struct _pthread_descr_struct __pthread_initial_thread = {
+ &__pthread_initial_thread, /* pthread_descr p_nextlive */
+ &__pthread_initial_thread, /* pthread_descr p_prevlive */
+ NULL, /* pthread_descr p_nextwaiting */
+ NULL, /* pthread_descr p_nextlock */
+ PTHREAD_THREADS_MAX, /* pthread_t p_tid */
+ 0, /* int p_pid */
+ 0, /* int p_priority */
+ &__pthread_handles[0].h_lock, /* struct _pthread_fastlock * p_lock */
+ 0, /* int p_signal */
+ NULL, /* sigjmp_buf * p_signal_buf */
+ NULL, /* sigjmp_buf * p_cancel_buf */
+ 0, /* char p_terminated */
+ 0, /* char p_detached */
+ 0, /* char p_exited */
+ NULL, /* void * p_retval */
+ 0, /* int p_retval */
+ NULL, /* pthread_descr p_joining */
+ NULL, /* struct _pthread_cleanup_buffer * p_cleanup */
+ 0, /* char p_cancelstate */
+ 0, /* char p_canceltype */
+ 0, /* char p_canceled */
+ &_errno, /* int *p_errnop */
+ 0, /* int p_errno */
+ &_h_errno, /* int *p_h_errnop */
+ 0, /* int p_h_errno */
+ NULL, /* char * p_in_sighandler */
+ 0, /* char p_sigwaiting */
+ PTHREAD_START_ARGS_INITIALIZER, /* struct pthread_start_args p_start_args */
+ {NULL}, /* void ** p_specific[PTHREAD_KEY_1STLEVEL_SIZE] */
+ {NULL}, /* void * p_libc_specific[_LIBC_TSD_KEY_N] */
+ 0, /* int p_userstack */
+ NULL, /* void * p_guardaddr */
+ 0, /* size_t p_guardsize */
+ &__pthread_initial_thread, /* pthread_descr p_self */
+ 0, /* Always index 0 */
+ 0, /* int p_report_events */
+ {{{0, }}, 0, NULL}, /* td_eventbuf_t p_eventbuf */
+ __ATOMIC_INITIALIZER, /* struct pthread_atomic p_resume_count */
+ 0, /* char p_woken_by_cancel */
+ 0, /* char p_condvar_avail */
+ 0, /* char p_sem_avail */
+ NULL, /* struct pthread_extricate_if *p_extricate */
+ NULL, /* pthread_readlock_info *p_readlock_list; */
+ NULL, /* pthread_readlock_info *p_readlock_free; */
+ 0 /* int p_untracked_readlock_count; */
+#ifdef __UCLIBC_HAS_XLOCALE__
+ ,
+ &__global_locale_data, /* __locale_t locale; */
+#endif /* __UCLIBC_HAS_XLOCALE__ */
+};
+
+/* Descriptor of the manager thread; none of this is used but the error
+ variables, the p_pid and p_priority fields,
+ and the address for identification. */
+#define manager_thread (&__pthread_manager_thread)
+struct _pthread_descr_struct __pthread_manager_thread = {
+ NULL, /* pthread_descr p_nextlive */
+ NULL, /* pthread_descr p_prevlive */
+ NULL, /* pthread_descr p_nextwaiting */
+ NULL, /* pthread_descr p_nextlock */
+ 0, /* int p_tid */
+ 0, /* int p_pid */
+ 0, /* int p_priority */
+ &__pthread_handles[1].h_lock, /* struct _pthread_fastlock * p_lock */
+ 0, /* int p_signal */
+ NULL, /* sigjmp_buf * p_signal_buf */
+ NULL, /* sigjmp_buf * p_cancel_buf */
+ 0, /* char p_terminated */
+ 0, /* char p_detached */
+ 0, /* char p_exited */
+ NULL, /* void * p_retval */
+ 0, /* int p_retval */
+ NULL, /* pthread_descr p_joining */
+ NULL, /* struct _pthread_cleanup_buffer * p_cleanup */
+ 0, /* char p_cancelstate */
+ 0, /* char p_canceltype */
+ 0, /* char p_canceled */
+ &__pthread_manager_thread.p_errno, /* int *p_errnop */
+ 0, /* int p_errno */
+ NULL, /* int *p_h_errnop */
+ 0, /* int p_h_errno */
+ NULL, /* char * p_in_sighandler */
+ 0, /* char p_sigwaiting */
+ PTHREAD_START_ARGS_INITIALIZER, /* struct pthread_start_args p_start_args */
+ {NULL}, /* void ** p_specific[PTHREAD_KEY_1STLEVEL_SIZE] */
+ {NULL}, /* void * p_libc_specific[_LIBC_TSD_KEY_N] */
+ 0, /* int p_userstack */
+ NULL, /* void * p_guardaddr */
+ 0, /* size_t p_guardsize */
+ &__pthread_manager_thread, /* pthread_descr p_self */
+ 1, /* Always index 1 */
+ 0, /* int p_report_events */
+ {{{0, }}, 0, NULL}, /* td_eventbuf_t p_eventbuf */
+ __ATOMIC_INITIALIZER, /* struct pthread_atomic p_resume_count */
+ 0, /* char p_woken_by_cancel */
+ 0, /* char p_condvar_avail */
+ 0, /* char p_sem_avail */
+ NULL, /* struct pthread_extricate_if *p_extricate */
+ NULL, /* pthread_readlock_info *p_readlock_list; */
+ NULL, /* pthread_readlock_info *p_readlock_free; */
+ 0 /* int p_untracked_readlock_count; */
+#ifdef __UCLIBC_HAS_XLOCALE__
+ ,
+ &__global_locale_data, /* __locale_t locale; */
+#endif /* __UCLIBC_HAS_XLOCALE__ */
+};
+
+/* Pointer to the main thread (the father of the thread manager thread) */
+/* Originally, this is the initial thread, but this changes after fork() */
+
+pthread_descr __pthread_main_thread = &__pthread_initial_thread;
+
+/* Limit between the stack of the initial thread (above) and the
+ stacks of other threads (below). Aligned on a STACK_SIZE boundary. */
+
+char *__pthread_initial_thread_bos = NULL;
+
+#ifndef __ARCH_USE_MMU__
+/* See nommu notes in internals.h and pthread_initialize() below. */
+char *__pthread_initial_thread_tos = NULL;
+char *__pthread_initial_thread_mid = NULL;
+#endif /* __ARCH_USE_MMU__ */
+
+/* File descriptor for sending requests to the thread manager. */
+/* Initially -1, meaning that the thread manager is not running. */
+
+int __pthread_manager_request = -1;
+
+/* Other end of the pipe for sending requests to the thread manager. */
+
+int __pthread_manager_reader;
+
+/* Limits of the thread manager stack */
+
+char *__pthread_manager_thread_bos = NULL;
+char *__pthread_manager_thread_tos = NULL;
+
+/* For process-wide exit() */
+
+int __pthread_exit_requested = 0;
+int __pthread_exit_code = 0;
+
+/* Communicate relevant LinuxThreads constants to gdb */
+
+const int __pthread_threads_max = PTHREAD_THREADS_MAX;
+const int __pthread_sizeof_handle = sizeof(struct pthread_handle_struct);
+const int __pthread_offsetof_descr = offsetof(struct pthread_handle_struct, h_descr);
+const int __pthread_offsetof_pid = offsetof(struct _pthread_descr_struct,
+ p_pid);
+const int __linuxthreads_pthread_sizeof_descr
+ = sizeof(struct _pthread_descr_struct);
+
+const int __linuxthreads_initial_report_events;
+
+const char __linuxthreads_version[] = VERSION;
+
+/* Forward declarations */
+static void pthread_onexit_process(int retcode, void *arg);
+static void pthread_handle_sigcancel(int sig);
+static void pthread_handle_sigrestart(int sig);
+static void pthread_handle_sigdebug(int sig);
+int __pthread_timedsuspend_new(pthread_descr self, const struct timespec *abstime);
+
+/* Signal numbers used for the communication.
+ In these variables we keep track of the used variables. If the
+ platform does not support any real-time signals we will define the
+ values to some unreasonable value which will signal failing of all
+ the functions below. */
+#ifndef __NR_rt_sigaction
+static int current_rtmin = -1;
+static int current_rtmax = -1;
+int __pthread_sig_restart = SIGUSR1;
+int __pthread_sig_cancel = SIGUSR2;
+int __pthread_sig_debug;
+#else
+
+#if __SIGRTMAX - __SIGRTMIN >= 3
+static int current_rtmin = __SIGRTMIN + 3;
+static int current_rtmax = __SIGRTMAX;
+int __pthread_sig_restart = __SIGRTMIN;
+int __pthread_sig_cancel = __SIGRTMIN + 1;
+int __pthread_sig_debug = __SIGRTMIN + 2;
+void (*__pthread_restart)(pthread_descr) = __pthread_restart_new;
+void (*__pthread_suspend)(pthread_descr) = __pthread_wait_for_restart_signal;
+int (*__pthread_timedsuspend)(pthread_descr, const struct timespec *) = __pthread_timedsuspend_new;
+#else
+static int current_rtmin = __SIGRTMIN;
+static int current_rtmax = __SIGRTMAX;
+int __pthread_sig_restart = SIGUSR1;
+int __pthread_sig_cancel = SIGUSR2;
+int __pthread_sig_debug;
+void (*__pthread_restart)(pthread_descr) = __pthread_restart_old;
+void (*__pthread_suspend)(pthread_descr) = __pthread_suspend_old;
+int (*__pthread_timedsuspend)(pthread_descr, const struct timespec *) = __pthread_timedsuspend_old;
+
+#endif
+
+/* Return number of available real-time signal with highest priority. */
+int __libc_current_sigrtmin (void)
+{
+ return current_rtmin;
+}
+
+/* Return number of available real-time signal with lowest priority. */
+int __libc_current_sigrtmax (void)
+{
+ return current_rtmax;
+}
+
+/* Allocate real-time signal with highest/lowest available
+ priority. Please note that we don't use a lock since we assume
+ this function to be called at program start. */
+int __libc_allocate_rtsig (int high);
+int __libc_allocate_rtsig (int high)
+{
+ if (current_rtmin == -1 || current_rtmin > current_rtmax)
+ /* We don't have anymore signal available. */
+ return -1;
+ return high ? current_rtmin++ : current_rtmax--;
+}
+#endif
+
+/* Initialize the pthread library.
+ Initialization is split in two functions:
+ - a constructor function that blocks the __pthread_sig_restart signal
+ (must do this very early, since the program could capture the signal
+ mask with e.g. sigsetjmp before creating the first thread);
+ - a regular function called from pthread_create when needed. */
+
+static void pthread_initialize(void) __attribute__((constructor));
+
+libpthread_hidden_proto(pthread_attr_destroy)
+libpthread_hidden_proto(pthread_attr_init)
+libpthread_hidden_proto(pthread_attr_getdetachstate)
+libpthread_hidden_proto(pthread_attr_setdetachstate)
+libpthread_hidden_proto(pthread_attr_getinheritsched)
+libpthread_hidden_proto(pthread_attr_setinheritsched)
+libpthread_hidden_proto(pthread_attr_setschedparam)
+libpthread_hidden_proto(pthread_attr_getschedparam)
+libpthread_hidden_proto(pthread_attr_getschedpolicy)
+libpthread_hidden_proto(pthread_attr_setschedpolicy)
+libpthread_hidden_proto(pthread_attr_getscope)
+libpthread_hidden_proto(pthread_attr_setscope)
+
+libpthread_hidden_proto(pthread_exit)
+
+libpthread_hidden_proto(pthread_equal)
+libpthread_hidden_proto(pthread_self)
+libpthread_hidden_proto(pthread_getschedparam)
+libpthread_hidden_proto(pthread_setschedparam)
+
+libpthread_hidden_proto(pthread_setcancelstate)
+libpthread_hidden_proto(pthread_setcanceltype)
+libpthread_hidden_proto(_pthread_cleanup_push_defer)
+libpthread_hidden_proto(_pthread_cleanup_pop_restore)
+
+libpthread_hidden_proto(pthread_cond_broadcast)
+libpthread_hidden_proto(pthread_cond_destroy)
+libpthread_hidden_proto(pthread_cond_init)
+libpthread_hidden_proto(pthread_cond_signal)
+libpthread_hidden_proto(pthread_cond_wait)
+libpthread_hidden_proto(pthread_cond_timedwait)
+
+libpthread_hidden_proto(pthread_condattr_destroy)
+libpthread_hidden_proto(pthread_condattr_init)
+
+struct pthread_functions __pthread_functions =
+ {
+#ifndef USE___THREAD
+ .ptr_pthread_internal_tsd_set = __pthread_internal_tsd_set,
+ .ptr_pthread_internal_tsd_get = __pthread_internal_tsd_get,
+ .ptr_pthread_internal_tsd_address = __pthread_internal_tsd_address,
+#endif
+/*
+ .ptr_pthread_fork = __pthread_fork,
+*/
+ .ptr_pthread_attr_destroy = pthread_attr_destroy,
+ .ptr_pthread_attr_init = pthread_attr_init,
+ .ptr_pthread_attr_getdetachstate = pthread_attr_getdetachstate,
+ .ptr_pthread_attr_setdetachstate = pthread_attr_setdetachstate,
+ .ptr_pthread_attr_getinheritsched = pthread_attr_getinheritsched,
+ .ptr_pthread_attr_setinheritsched = pthread_attr_setinheritsched,
+ .ptr_pthread_attr_getschedparam = pthread_attr_getschedparam,
+ .ptr_pthread_attr_setschedparam = pthread_attr_setschedparam,
+ .ptr_pthread_attr_getschedpolicy = pthread_attr_getschedpolicy,
+ .ptr_pthread_attr_setschedpolicy = pthread_attr_setschedpolicy,
+ .ptr_pthread_attr_getscope = pthread_attr_getscope,
+ .ptr_pthread_attr_setscope = pthread_attr_setscope,
+ .ptr_pthread_condattr_destroy = pthread_condattr_destroy,
+ .ptr_pthread_condattr_init = pthread_condattr_init,
+ .ptr_pthread_cond_broadcast = pthread_cond_broadcast,
+ .ptr_pthread_cond_destroy = pthread_cond_destroy,
+ .ptr_pthread_cond_init = pthread_cond_init,
+ .ptr_pthread_cond_signal = pthread_cond_signal,
+ .ptr_pthread_cond_wait = pthread_cond_wait,
+ .ptr_pthread_cond_timedwait = pthread_cond_timedwait,
+ .ptr_pthread_equal = pthread_equal,
+ .ptr___pthread_exit = pthread_exit,
+ .ptr_pthread_getschedparam = pthread_getschedparam,
+ .ptr_pthread_setschedparam = pthread_setschedparam,
+ .ptr_pthread_mutex_destroy = __pthread_mutex_destroy,
+ .ptr_pthread_mutex_init = __pthread_mutex_init,
+ .ptr_pthread_mutex_lock = __pthread_mutex_lock,
+ .ptr_pthread_mutex_trylock = __pthread_mutex_trylock,
+ .ptr_pthread_mutex_unlock = __pthread_mutex_unlock,
+ .ptr_pthread_self = pthread_self,
+ .ptr_pthread_setcancelstate = pthread_setcancelstate,
+ .ptr_pthread_setcanceltype = pthread_setcanceltype,
+/*
+ .ptr_pthread_do_exit = pthread_do_exit,
+ .ptr_pthread_thread_self = pthread_thread_self,
+ .ptr_pthread_cleanup_upto = pthread_cleanup_upto,
+ .ptr_pthread_sigaction = pthread_sigaction,
+ .ptr_pthread_sigwait = pthread_sigwait,
+ .ptr_pthread_raise = pthread_raise,
+ .ptr__pthread_cleanup_push = _pthread_cleanup_push,
+ .ptr__pthread_cleanup_pop = _pthread_cleanup_pop
+*/
+ .ptr__pthread_cleanup_push_defer = __pthread_cleanup_push_defer,
+ .ptr__pthread_cleanup_pop_restore = __pthread_cleanup_pop_restore,
+ };
+#ifdef SHARED
+# define ptr_pthread_functions &__pthread_functions
+#else
+# define ptr_pthread_functions NULL
+#endif
+
+static int *__libc_multiple_threads_ptr;
+
+ /* Do some minimal initialization which has to be done during the
+ startup of the C library. */
+void __pthread_initialize_minimal(void)
+{
+ /* If we have special thread_self processing, initialize
+ * that for the main thread now. */
+#ifdef INIT_THREAD_SELF
+ INIT_THREAD_SELF(&__pthread_initial_thread, 0);
+#endif
+
+ __libc_multiple_threads_ptr = __libc_pthread_init (ptr_pthread_functions);
+}
+
+
+static void pthread_initialize(void)
+{
+ struct sigaction sa;
+ sigset_t mask;
+#ifdef __ARCH_USE_MMU__
+ struct rlimit limit;
+ rlim_t max_stack;
+#endif
+
+ /* If already done (e.g. by a constructor called earlier!), bail out */
+ if (__pthread_initial_thread_bos != NULL) return;
+#ifdef TEST_FOR_COMPARE_AND_SWAP
+ /* Test if compare-and-swap is available */
+ __pthread_has_cas = compare_and_swap_is_available();
+#endif
+ /* For the initial stack, reserve at least STACK_SIZE bytes of stack
+ below the current stack address, and align that on a
+ STACK_SIZE boundary. */
+ __pthread_initial_thread_bos =
+ (char *)(((long)CURRENT_STACK_FRAME - 2 * STACK_SIZE) & ~(STACK_SIZE - 1));
+ /* Update the descriptor for the initial thread. */
+ __pthread_initial_thread.p_pid = getpid();
+ /* If we have special thread_self processing, initialize that for the
+ main thread now. */
+#ifdef INIT_THREAD_SELF
+ INIT_THREAD_SELF(&__pthread_initial_thread, 0);
+#endif
+ /* The errno/h_errno variable of the main thread are the global ones. */
+ __pthread_initial_thread.p_errnop = &_errno;
+ __pthread_initial_thread.p_h_errnop = &_h_errno;
+
+#ifdef __UCLIBC_HAS_XLOCALE__
+ /* The locale of the main thread is the current locale in use. */
+ __pthread_initial_thread.locale = __curlocale_var;
+#endif /* __UCLIBC_HAS_XLOCALE__ */
+
+ { /* uClibc-specific stdio initialization for threads. */
+ FILE *fp;
+
+ _stdio_user_locking = 0; /* 2 if threading not initialized */
+ for (fp = _stdio_openlist; fp != NULL; fp = fp->__nextopen) {
+ if (fp->__user_locking != 1) {
+ fp->__user_locking = 0;
+ }
+ }
+ }
+
+ /* Play with the stack size limit to make sure that no stack ever grows
+ beyond STACK_SIZE minus two pages (one page for the thread descriptor
+ immediately beyond, and one page to act as a guard page). */
+
+#ifdef __ARCH_USE_MMU__
+ /* We cannot allocate a huge chunk of memory to mmap all thread stacks later
+ * on a non-MMU system. Thus, we don't need the rlimit either. -StS */
+ getrlimit(RLIMIT_STACK, &limit);
+ max_stack = STACK_SIZE - 2 * getpagesize();
+ if (limit.rlim_cur > max_stack) {
+ limit.rlim_cur = max_stack;
+ setrlimit(RLIMIT_STACK, &limit);
+ }
+#else
+ /* For non-MMU, the initial thread stack can reside anywhere in memory.
+ * We don't have a way of knowing where the kernel started things -- top
+ * or bottom (well, that isn't exactly true, but the solution is fairly
+ * complex and error prone). All we can determine here is an address
+ * that lies within that stack. Save that address as a reference so that
+ * as other thread stacks are created, we can adjust the estimated bounds
+ * of the initial thread's stack appropriately.
+ *
+ * This checking is handled in NOMMU_INITIAL_THREAD_BOUNDS(), so see that
+ * for a few more details.
+ */
+ __pthread_initial_thread_mid = CURRENT_STACK_FRAME;
+ __pthread_initial_thread_tos = (char *) -1;
+ __pthread_initial_thread_bos = (char *) 1; /* set it non-zero so we know we have been here */
+ PDEBUG("initial thread stack bounds: bos=%p, tos=%p\n",
+ __pthread_initial_thread_bos, __pthread_initial_thread_tos);
+#endif /* __ARCH_USE_MMU__ */
+
+ /* Setup signal handlers for the initial thread.
+ Since signal handlers are shared between threads, these settings
+ will be inherited by all other threads. */
+ memset(&sa, 0, sizeof(sa));
+ sa.sa_handler = pthread_handle_sigrestart;
+ __libc_sigaction(__pthread_sig_restart, &sa, NULL);
+ sa.sa_handler = pthread_handle_sigcancel;
+ sigaddset(&sa.sa_mask, __pthread_sig_restart);
+ __libc_sigaction(__pthread_sig_cancel, &sa, NULL);
+ if (__pthread_sig_debug > 0) {
+ sa.sa_handler = pthread_handle_sigdebug;
+ __sigemptyset(&sa.sa_mask);
+ __libc_sigaction(__pthread_sig_debug, &sa, NULL);
+ }
+ /* Initially, block __pthread_sig_restart. Will be unblocked on demand. */
+ __sigemptyset(&mask);
+ sigaddset(&mask, __pthread_sig_restart);
+ sigprocmask(SIG_BLOCK, &mask, NULL);
+ /* And unblock __pthread_sig_cancel if it has been blocked. */
+ sigdelset(&mask, __pthread_sig_restart);
+ sigaddset(&mask, __pthread_sig_cancel);
+ sigprocmask(SIG_UNBLOCK, &mask, NULL);
+ /* Register an exit function to kill all other threads. */
+ /* Do it early so that user-registered atexit functions are called
+ before pthread_onexit_process. */
+ on_exit(pthread_onexit_process, NULL);
+}
+
+void __pthread_initialize(void);
+void __pthread_initialize(void)
+{
+ pthread_initialize();
+}
+
+int __pthread_initialize_manager(void)
+{
+ int manager_pipe[2];
+ int pid;
+ int report_events;
+ struct pthread_request request;
+
+ *__libc_multiple_threads_ptr = 1;
+
+ /* If basic initialization not done yet (e.g. we're called from a
+ constructor run before our constructor), do it now */
+ if (__pthread_initial_thread_bos == NULL) pthread_initialize();
+ /* Setup stack for thread manager */
+ __pthread_manager_thread_bos = malloc(THREAD_MANAGER_STACK_SIZE);
+ if (__pthread_manager_thread_bos == NULL) return -1;
+ __pthread_manager_thread_tos =
+ __pthread_manager_thread_bos + THREAD_MANAGER_STACK_SIZE;
+
+ /* On non-MMU systems we make sure that the initial thread bounds don't overlap
+ * with the manager stack frame */
+ NOMMU_INITIAL_THREAD_BOUNDS(__pthread_manager_thread_tos,__pthread_manager_thread_bos);
+ PDEBUG("manager stack: size=%d, bos=%p, tos=%p\n", THREAD_MANAGER_STACK_SIZE,
+ __pthread_manager_thread_bos, __pthread_manager_thread_tos);
+#if 0
+ PDEBUG("initial stack: estimate bos=%p, tos=%p\n",
+ __pthread_initial_thread_bos, __pthread_initial_thread_tos);
+#endif
+
+ /* Setup pipe to communicate with thread manager */
+ if (pipe(manager_pipe) == -1) {
+ free(__pthread_manager_thread_bos);
+ return -1;
+ }
+ /* Start the thread manager */
+ pid = 0;
+#if defined(USE_TLS) && USE_TLS
+ if (__linuxthreads_initial_report_events != 0)
+ THREAD_SETMEM (((pthread_descr) NULL), p_report_events,
+ __linuxthreads_initial_report_events);
+ report_events = THREAD_GETMEM (((pthread_descr) NULL), p_report_events);
+#else
+ if (__linuxthreads_initial_report_events != 0)
+ __pthread_initial_thread.p_report_events
+ = __linuxthreads_initial_report_events;
+ report_events = __pthread_initial_thread.p_report_events;
+#endif
+ if (__builtin_expect (report_events, 0))
+ {
+ /* It's a bit more complicated. We have to report the creation of
+ the manager thread. */
+ int idx = __td_eventword (TD_CREATE);
+ uint32_t mask = __td_eventmask (TD_CREATE);
+
+ if ((mask & (__pthread_threads_events.event_bits[idx]
+ | __pthread_initial_thread.p_eventbuf.eventmask.event_bits[idx]))
+ != 0)
+ {
+
+ __pthread_lock(__pthread_manager_thread.p_lock, NULL);
+
+#ifdef __ia64__
+ pid = __clone2(__pthread_manager_event,
+ (void **) __pthread_manager_thread_tos,
+ THREAD_MANAGER_STACK_SIZE,
+ CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND,
+ (void *)(long)manager_pipe[0]);
+#else
+ pid = clone(__pthread_manager_event,
+ (void **) __pthread_manager_thread_tos,
+ CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND,
+ (void *)(long)manager_pipe[0]);
+#endif
+
+ if (pid != -1)
+ {
+ /* Now fill in the information about the new thread in
+ the newly created thread's data structure. We cannot let
+ the new thread do this since we don't know whether it was
+ already scheduled when we send the event. */
+ __pthread_manager_thread.p_eventbuf.eventdata =
+ &__pthread_manager_thread;
+ __pthread_manager_thread.p_eventbuf.eventnum = TD_CREATE;
+ __pthread_last_event = &__pthread_manager_thread;
+ __pthread_manager_thread.p_tid = 2* PTHREAD_THREADS_MAX + 1;
+ __pthread_manager_thread.p_pid = pid;
+
+ /* Now call the function which signals the event. */
+ __linuxthreads_create_event ();
+ }
+ /* Now restart the thread. */
+ __pthread_unlock(__pthread_manager_thread.p_lock);
+ }
+ }
+
+ if (pid == 0) {
+#ifdef __ia64__
+ pid = __clone2(__pthread_manager, (void **) __pthread_manager_thread_tos,
+ THREAD_MANAGER_STACK_SIZE,
+ CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND,
+ (void *)(long)manager_pipe[0]);
+#else
+ pid = clone(__pthread_manager, (void **) __pthread_manager_thread_tos,
+ CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND,
+ (void *)(long)manager_pipe[0]);
+#endif
+ }
+ if (pid == -1) {
+ free(__pthread_manager_thread_bos);
+ close(manager_pipe[0]);
+ close(manager_pipe[1]);
+ return -1;
+ }
+ __pthread_manager_request = manager_pipe[1]; /* writing end */
+ __pthread_manager_reader = manager_pipe[0]; /* reading end */
+ __pthread_manager_thread.p_tid = 2* PTHREAD_THREADS_MAX + 1;
+ __pthread_manager_thread.p_pid = pid;
+
+ /* Make gdb aware of new thread manager */
+ if (__pthread_threads_debug && __pthread_sig_debug > 0)
+ {
+ raise(__pthread_sig_debug);
+ /* We suspend ourself and gdb will wake us up when it is
+ ready to handle us. */
+ __pthread_wait_for_restart_signal(thread_self());
+ }
+ /* Synchronize debugging of the thread manager */
+ PDEBUG("send REQ_DEBUG to manager thread\n");
+ request.req_kind = REQ_DEBUG;
+ TEMP_FAILURE_RETRY(write(__pthread_manager_request,
+ (char *) &request, sizeof(request)));
+ return 0;
+}
+
+/* Thread creation */
+
+int pthread_create(pthread_t *thread, const pthread_attr_t *attr,
+ void * (*start_routine)(void *), void *arg)
+{
+ pthread_descr self = thread_self();
+ struct pthread_request request;
+ if (__pthread_manager_request < 0) {
+ if (__pthread_initialize_manager() < 0) return EAGAIN;
+ }
+ request.req_thread = self;
+ request.req_kind = REQ_CREATE;
+ request.req_args.create.attr = attr;
+ request.req_args.create.fn = start_routine;
+ request.req_args.create.arg = arg;
+ sigprocmask(SIG_SETMASK, NULL, &request.req_args.create.mask);
+ PDEBUG("write REQ_CREATE to manager thread\n");
+ TEMP_FAILURE_RETRY(write(__pthread_manager_request,
+ (char *) &request, sizeof(request)));
+ PDEBUG("before suspend(self)\n");
+ suspend(self);
+ PDEBUG("after suspend(self)\n");
+ if (THREAD_GETMEM(self, p_retcode) == 0)
+ *thread = (pthread_t) THREAD_GETMEM(self, p_retval);
+ return THREAD_GETMEM(self, p_retcode);
+}
+
+/* Simple operations on thread identifiers */
+
+pthread_t pthread_self(void)
+{
+ pthread_descr self = thread_self();
+ return THREAD_GETMEM(self, p_tid);
+}
+libpthread_hidden_def (pthread_self)
+
+int pthread_equal(pthread_t thread1, pthread_t thread2)
+{
+ return thread1 == thread2;
+}
+libpthread_hidden_def (pthread_equal)
+
+/* Helper function for thread_self in the case of user-provided stacks */
+
+#ifndef THREAD_SELF
+
+pthread_descr __pthread_find_self(void)
+{
+ char * sp = CURRENT_STACK_FRAME;
+ pthread_handle h;
+
+ /* __pthread_handles[0] is the initial thread, __pthread_handles[1] is
+ the manager threads handled specially in thread_self(), so start at 2 */
+ h = __pthread_handles + 2;
+ while (! (sp <= (char *) h->h_descr && sp >= h->h_bottom)) h++;
+
+#ifdef DEBUG_PT
+ if (h->h_descr == NULL) {
+ printf("*** %s ERROR descriptor is NULL!!!!! ***\n\n", __FUNCTION__);
+ _exit(1);
+ }
+#endif
+
+ return h->h_descr;
+}
+#else
+
+static pthread_descr thread_self_stack(void)
+{
+ char *sp = CURRENT_STACK_FRAME;
+ pthread_handle h;
+
+ if (sp >= __pthread_manager_thread_bos && sp < __pthread_manager_thread_tos)
+ return manager_thread;
+ h = __pthread_handles + 2;
+# if defined(USE_TLS) && USE_TLS
+ while (h->h_descr == NULL
+ || ! (sp <= (char *) h->h_descr->p_stackaddr && sp >= h->h_bottom))
+ h++;
+# else
+ while (! (sp <= (char *) h->h_descr && sp >= h->h_bottom))
+ h++;
+# endif
+ return h->h_descr;
+}
+
+#endif
+
+/* Thread scheduling */
+
+int pthread_setschedparam(pthread_t thread, int policy,
+ const struct sched_param *param)
+{
+ pthread_handle handle = thread_handle(thread);
+ pthread_descr th;
+
+ __pthread_lock(&handle->h_lock, NULL);
+ if (invalid_handle(handle, thread)) {
+ __pthread_unlock(&handle->h_lock);
+ return ESRCH;
+ }
+ th = handle->h_descr;
+ if (sched_setscheduler(th->p_pid, policy, param) == -1) {
+ __pthread_unlock(&handle->h_lock);
+ return errno;
+ }
+ th->p_priority = policy == SCHED_OTHER ? 0 : param->sched_priority;
+ __pthread_unlock(&handle->h_lock);
+ if (__pthread_manager_request >= 0)
+ __pthread_manager_adjust_prio(th->p_priority);
+ return 0;
+}
+libpthread_hidden_def(pthread_setschedparam)
+
+int pthread_getschedparam(pthread_t thread, int *policy,
+ struct sched_param *param)
+{
+ pthread_handle handle = thread_handle(thread);
+ int pid, pol;
+
+ __pthread_lock(&handle->h_lock, NULL);
+ if (invalid_handle(handle, thread)) {
+ __pthread_unlock(&handle->h_lock);
+ return ESRCH;
+ }
+ pid = handle->h_descr->p_pid;
+ __pthread_unlock(&handle->h_lock);
+ pol = sched_getscheduler(pid);
+ if (pol == -1) return errno;
+ if (sched_getparam(pid, param) == -1) return errno;
+ *policy = pol;
+ return 0;
+}
+libpthread_hidden_def(pthread_getschedparam)
+
+/* Process-wide exit() request */
+
+static void pthread_onexit_process(int retcode, void *arg attribute_unused)
+{
+ struct pthread_request request;
+ pthread_descr self = thread_self();
+
+ if (__pthread_manager_request >= 0) {
+ request.req_thread = self;
+ request.req_kind = REQ_PROCESS_EXIT;
+ request.req_args.exit.code = retcode;
+ TEMP_FAILURE_RETRY(write(__pthread_manager_request,
+ (char *) &request, sizeof(request)));
+ suspend(self);
+ /* Main thread should accumulate times for thread manager and its
+ children, so that timings for main thread account for all threads. */
+ if (self == __pthread_main_thread) {
+ waitpid(__pthread_manager_thread.p_pid, NULL, __WCLONE);
+ /* Since all threads have been asynchronously terminated
+ * (possibly holding locks), free cannot be used any more. */
+ __pthread_manager_thread_bos = __pthread_manager_thread_tos = NULL;
+ }
+ }
+}
+
+/* The handler for the RESTART signal just records the signal received
+ in the thread descriptor, and optionally performs a siglongjmp
+ (for pthread_cond_timedwait). */
+
+static void pthread_handle_sigrestart(int sig)
+{
+ pthread_descr self = thread_self();
+ THREAD_SETMEM(self, p_signal, sig);
+ if (THREAD_GETMEM(self, p_signal_jmp) != NULL)
+ siglongjmp(*THREAD_GETMEM(self, p_signal_jmp), 1);
+}
+
+/* The handler for the CANCEL signal checks for cancellation
+ (in asynchronous mode), for process-wide exit and exec requests.
+ For the thread manager thread, redirect the signal to
+ __pthread_manager_sighandler. */
+
+static void pthread_handle_sigcancel(int sig)
+{
+ pthread_descr self = thread_self();
+ sigjmp_buf * jmpbuf;
+
+
+ if (self == &__pthread_manager_thread)
+ {
+#ifdef THREAD_SELF
+ /* A new thread might get a cancel signal before it is fully
+ initialized, so that the thread register might still point to the
+ manager thread. Double check that this is really the manager
+ thread. */
+ pthread_descr real_self = thread_self_stack();
+ if (real_self == &__pthread_manager_thread)
+ {
+ __pthread_manager_sighandler(sig);
+ return;
+ }
+ /* Oops, thread_self() isn't working yet.. */
+ self = real_self;
+# ifdef INIT_THREAD_SELF
+ INIT_THREAD_SELF(self, self->p_nr);
+# endif
+#else
+ __pthread_manager_sighandler(sig);
+ return;
+#endif
+ }
+ if (__builtin_expect (__pthread_exit_requested, 0)) {
+ /* Main thread should accumulate times for thread manager and its
+ children, so that timings for main thread account for all threads. */
+ if (self == __pthread_main_thread) {
+#if defined(USE_TLS) && USE_TLS
+ waitpid(__pthread_manager_thread->p_pid, NULL, __WCLONE);
+#else
+ waitpid(__pthread_manager_thread.p_pid, NULL, __WCLONE);
+#endif
+ }
+ _exit(__pthread_exit_code);
+ }
+ if (__builtin_expect (THREAD_GETMEM(self, p_canceled), 0)
+ && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE) {
+ if (THREAD_GETMEM(self, p_canceltype) == PTHREAD_CANCEL_ASYNCHRONOUS)
+ __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME);
+ jmpbuf = THREAD_GETMEM(self, p_cancel_jmp);
+ if (jmpbuf != NULL) {
+ THREAD_SETMEM(self, p_cancel_jmp, NULL);
+ siglongjmp(*jmpbuf, 1);
+ }
+ }
+}
+
+/* Handler for the DEBUG signal.
+ The debugging strategy is as follows:
+ On reception of a REQ_DEBUG request (sent by new threads created to
+ the thread manager under debugging mode), the thread manager throws
+ __pthread_sig_debug to itself. The debugger (if active) intercepts
+ this signal, takes into account new threads and continue execution
+ of the thread manager by propagating the signal because it doesn't
+ know what it is specifically done for. In the current implementation,
+ the thread manager simply discards it. */
+
+static void pthread_handle_sigdebug(int sig attribute_unused)
+{
+ /* Nothing */
+}
+
+/* Reset the state of the thread machinery after a fork().
+ Close the pipe used for requests and set the main thread to the forked
+ thread.
+ Notice that we can't free the stack segments, as the forked thread
+ may hold pointers into them. */
+
+void __pthread_reset_main_thread(void)
+{
+ pthread_descr self = thread_self();
+
+ if (__pthread_manager_request != -1) {
+ /* Free the thread manager stack */
+ free(__pthread_manager_thread_bos);
+ __pthread_manager_thread_bos = __pthread_manager_thread_tos = NULL;
+ /* Close the two ends of the pipe */
+ close(__pthread_manager_request);
+ close(__pthread_manager_reader);
+ __pthread_manager_request = __pthread_manager_reader = -1;
+ }
+
+ /* Update the pid of the main thread */
+ THREAD_SETMEM(self, p_pid, getpid());
+ /* Make the forked thread the main thread */
+ __pthread_main_thread = self;
+ THREAD_SETMEM(self, p_nextlive, self);
+ THREAD_SETMEM(self, p_prevlive, self);
+ /* Now this thread modifies the global variables. */
+ THREAD_SETMEM(self, p_errnop, &_errno);
+ THREAD_SETMEM(self, p_h_errnop, &_h_errno);
+}
+
+/* Process-wide exec() request */
+
+void __pthread_kill_other_threads_np(void)
+{
+ struct sigaction sa;
+ /* Terminate all other threads and thread manager */
+ pthread_onexit_process(0, NULL);
+ /* Make current thread the main thread in case the calling thread
+ changes its mind, does not exec(), and creates new threads instead. */
+ __pthread_reset_main_thread();
+ /* Reset the signal handlers behaviour for the signals the
+ implementation uses since this would be passed to the new
+ process. */
+ memset(&sa, 0, sizeof(sa));
+ if (SIG_DFL) /* if it's constant zero, it's already done */
+ sa.sa_handler = SIG_DFL;
+ __libc_sigaction(__pthread_sig_restart, &sa, NULL);
+ __libc_sigaction(__pthread_sig_cancel, &sa, NULL);
+ if (__pthread_sig_debug > 0)
+ __libc_sigaction(__pthread_sig_debug, &sa, NULL);
+}
+weak_alias (__pthread_kill_other_threads_np, pthread_kill_other_threads_np)
+
+/* Concurrency symbol level. */
+static int current_level;
+
+int __pthread_setconcurrency(int level)
+{
+ /* We don't do anything unless we have found a useful interpretation. */
+ current_level = level;
+ return 0;
+}
+weak_alias (__pthread_setconcurrency, pthread_setconcurrency)
+
+int __pthread_getconcurrency(void)
+{
+ return current_level;
+}
+weak_alias (__pthread_getconcurrency, pthread_getconcurrency)
+
+
+/* Primitives for controlling thread execution */
+
+void __pthread_wait_for_restart_signal(pthread_descr self)
+{
+ sigset_t mask;
+
+ sigprocmask(SIG_SETMASK, NULL, &mask); /* Get current signal mask */
+ sigdelset(&mask, __pthread_sig_restart); /* Unblock the restart signal */
+ THREAD_SETMEM(self, p_signal, 0);
+ do {
+ sigsuspend(&mask); /* Wait for signal */
+ } while (THREAD_GETMEM(self, p_signal) !=__pthread_sig_restart);
+
+ READ_MEMORY_BARRIER(); /* See comment in __pthread_restart_new */
+}
+
+#ifndef __NR_rt_sigaction
+/* The _old variants are for 2.0 and early 2.1 kernels which don't have RT
+ signals.
+ On these kernels, we use SIGUSR1 and SIGUSR2 for restart and cancellation.
+ Since the restart signal does not queue, we use an atomic counter to create
+ queuing semantics. This is needed to resolve a rare race condition in
+ pthread_cond_timedwait_relative. */
+
+void __pthread_restart_old(pthread_descr th)
+{
+ if (atomic_increment(&th->p_resume_count) == -1)
+ kill(th->p_pid, __pthread_sig_restart);
+}
+
+void __pthread_suspend_old(pthread_descr self)
+{
+ if (atomic_decrement(&self->p_resume_count) <= 0)
+ __pthread_wait_for_restart_signal(self);
+}
+
+int
+__pthread_timedsuspend_old(pthread_descr self, const struct timespec *abstime)
+{
+ sigset_t unblock, initial_mask;
+ int was_signalled = 0;
+ sigjmp_buf jmpbuf;
+
+ if (atomic_decrement(&self->p_resume_count) == 0) {
+ /* Set up a longjmp handler for the restart signal, unblock
+ the signal and sleep. */
+
+ if (sigsetjmp(jmpbuf, 1) == 0) {
+ THREAD_SETMEM(self, p_signal_jmp, &jmpbuf);
+ THREAD_SETMEM(self, p_signal, 0);
+ /* Unblock the restart signal */
+ __sigemptyset(&unblock);
+ sigaddset(&unblock, __pthread_sig_restart);
+ sigprocmask(SIG_UNBLOCK, &unblock, &initial_mask);
+
+ while (1) {
+ struct timeval now;
+ struct timespec reltime;
+
+ /* Compute a time offset relative to now. */
+ gettimeofday (&now, NULL);
+ reltime.tv_nsec = abstime->tv_nsec - now.tv_usec * 1000;
+ reltime.tv_sec = abstime->tv_sec - now.tv_sec;
+ if (reltime.tv_nsec < 0) {
+ reltime.tv_nsec += 1000000000;
+ reltime.tv_sec -= 1;
+ }
+
+ /* Sleep for the required duration. If woken by a signal,
+ resume waiting as required by Single Unix Specification. */
+ if (reltime.tv_sec < 0 || nanosleep(&reltime, NULL) == 0)
+ break;
+ }
+
+ /* Block the restart signal again */
+ sigprocmask(SIG_SETMASK, &initial_mask, NULL);
+ was_signalled = 0;
+ } else {
+ was_signalled = 1;
+ }
+ THREAD_SETMEM(self, p_signal_jmp, NULL);
+ }
+
+ /* Now was_signalled is true if we exited the above code
+ due to the delivery of a restart signal. In that case,
+ we know we have been dequeued and resumed and that the
+ resume count is balanced. Otherwise, there are some
+ cases to consider. First, try to bump up the resume count
+ back to zero. If it goes to 1, it means restart() was
+ invoked on this thread. The signal must be consumed
+ and the count bumped down and everything is cool. We
+ can return a 1 to the caller.
+ Otherwise, no restart was delivered yet, so a potential
+ race exists; we return a 0 to the caller which must deal
+ with this race in an appropriate way; for example by
+ atomically removing the thread from consideration for a
+ wakeup---if such a thing fails, it means a restart is
+ being delivered. */
+
+ if (!was_signalled) {
+ if (atomic_increment(&self->p_resume_count) != -1) {
+ __pthread_wait_for_restart_signal(self);
+ atomic_decrement(&self->p_resume_count); /* should be zero now! */
+ /* woke spontaneously and consumed restart signal */
+ return 1;
+ }
+ /* woke spontaneously but did not consume restart---caller must resolve */
+ return 0;
+ }
+ /* woken due to restart signal */
+ return 1;
+}
+#endif /* __NR_rt_sigaction */
+
+
+#ifdef __NR_rt_sigaction
+void __pthread_restart_new(pthread_descr th)
+{
+ /* The barrier is proabably not needed, in which case it still documents
+ our assumptions. The intent is to commit previous writes to shared
+ memory so the woken thread will have a consistent view. Complementary
+ read barriers are present to the suspend functions. */
+ WRITE_MEMORY_BARRIER();
+ kill(th->p_pid, __pthread_sig_restart);
+}
+
+int __pthread_timedsuspend_new(pthread_descr self, const struct timespec *abstime)
+{
+ sigset_t unblock, initial_mask;
+ int was_signalled = 0;
+ sigjmp_buf jmpbuf;
+
+ if (sigsetjmp(jmpbuf, 1) == 0) {
+ THREAD_SETMEM(self, p_signal_jmp, &jmpbuf);
+ THREAD_SETMEM(self, p_signal, 0);
+ /* Unblock the restart signal */
+ __sigemptyset(&unblock);
+ sigaddset(&unblock, __pthread_sig_restart);
+ sigprocmask(SIG_UNBLOCK, &unblock, &initial_mask);
+
+ while (1) {
+ struct timeval now;
+ struct timespec reltime;
+
+ /* Compute a time offset relative to now. */
+ gettimeofday (&now, NULL);
+ reltime.tv_nsec = abstime->tv_nsec - now.tv_usec * 1000;
+ reltime.tv_sec = abstime->tv_sec - now.tv_sec;
+ if (reltime.tv_nsec < 0) {
+ reltime.tv_nsec += 1000000000;
+ reltime.tv_sec -= 1;
+ }
+
+ /* Sleep for the required duration. If woken by a signal,
+ resume waiting as required by Single Unix Specification. */
+ if (reltime.tv_sec < 0 || nanosleep(&reltime, NULL) == 0)
+ break;
+ }
+
+ /* Block the restart signal again */
+ sigprocmask(SIG_SETMASK, &initial_mask, NULL);
+ was_signalled = 0;
+ } else {
+ was_signalled = 1;
+ }
+ THREAD_SETMEM(self, p_signal_jmp, NULL);
+
+ /* Now was_signalled is true if we exited the above code
+ due to the delivery of a restart signal. In that case,
+ everything is cool. We have been removed from whatever
+ we were waiting on by the other thread, and consumed its signal.
+
+ Otherwise we this thread woke up spontaneously, or due to a signal other
+ than restart. This is an ambiguous case that must be resolved by
+ the caller; the thread is still eligible for a restart wakeup
+ so there is a race. */
+
+ READ_MEMORY_BARRIER(); /* See comment in __pthread_restart_new */
+ return was_signalled;
+}
+#endif
+
+/* Debugging aid */
+
+#ifdef DEBUG_PT
+#include <stdarg.h>
+
+void __pthread_message(char * fmt, ...)
+{
+ char buffer[1024];
+ va_list args;
+ sprintf(buffer, "%05d : ", getpid());
+ va_start(args, fmt);
+ vsnprintf(buffer + 8, sizeof(buffer) - 8, fmt, args);
+ va_end(args);
+ TEMP_FAILURE_RETRY(write(2, buffer, strlen(buffer)));
+}
+
+#endif
+
+
+#ifndef __PIC__
+/* We need a hook to force the cancellation wrappers to be linked in when
+ static libpthread is used. */
+extern const char __pthread_provide_wrappers;
+static const char *const __pthread_require_wrappers =
+ &__pthread_provide_wrappers;
+#endif