[fusl] clang-format fusl

fusl/src/thread/pthread_create.c

 #define _GNU_SOURCE
 #include "pthread_impl.h"
 #include "stdio_impl.h"
 #include "libc.h"
 #include <sys/mman.h>
 #include <string.h>
 #include <stddef.h>
 
-void *__mmap(void *, size_t, int, int, int, off_t);
-int __munmap(void *, size_t);
-int __mprotect(void *, size_t, int);
-
-static void dummy_0()
-{
-}
+void* __mmap(void*, size_t, int, int, int, off_t);
+int __munmap(void*, size_t);
+int __mprotect(void*, size_t, int);
+
+static void dummy_0() {}
 weak_alias(dummy_0, __acquire_ptc);
 weak_alias(dummy_0, __release_ptc);
 weak_alias(dummy_0, __pthread_tsd_run_dtors);
 weak_alias(dummy_0, __do_orphaned_stdio_locks);
 weak_alias(dummy_0, __dl_thread_cleanup);
 
-_Noreturn void __pthread_exit(void *result)
-{
-        pthread_t self = __pthread_self();
-        sigset_t set;
-
-        self->canceldisable = 1;
-        self->cancelasync = 0;
-        self->result = result;
-
-        while (self->cancelbuf) {
-                void (*f)(void *) = self->cancelbuf->__f;
-                void *x = self->cancelbuf->__x;
-                self->cancelbuf = self->cancelbuf->__next;
-                f(x);
-        }
-
-        __pthread_tsd_run_dtors();
-
-        __lock(self->exitlock);
-
-        /* Mark this thread dead before decrementing count */
-        __lock(self->killlock);
-        self->dead = 1;
-
-        /* Block all signals before decrementing the live thread count.
-         * This is important to ensure that dynamically allocated TLS
-         * is not under-allocated/over-committed, and possibly for other
-         * reasons as well. */
-        __block_all_sigs(&set);
-
-        /* Wait to unlock the kill lock, which governs functions like
-         * pthread_kill which target a thread id, until signals have
-         * been blocked. This precludes observation of the thread id
-         * as a live thread (with application code running in it) after
-         * the thread was reported dead by ESRCH being returned. */
-        __unlock(self->killlock);
-
-        /* It's impossible to determine whether this is "the last thread"
-         * until performing the atomic decrement, since multiple threads
-         * could exit at the same time. For the last thread, revert the
-         * decrement and unblock signals to give the atexit handlers and
-         * stdio cleanup code a consistent state. */
-        if (a_fetch_add(&libc.threads_minus_1, -1)==0) {
-                libc.threads_minus_1 = 0;
-                __restore_sigs(&set);
-                exit(0);
-        }
-
-        /* Process robust list in userspace to handle non-pshared mutexes
-         * and the detached thread case where the robust list head will
-         * be invalid when the kernel would process it. */
-        __vm_lock();
-        volatile void *volatile *rp;
-        while ((rp=self->robust_list.head) && rp != &self->robust_list.head) {
-                pthread_mutex_t *m = (void *)((char *)rp
-                        - offsetof(pthread_mutex_t, _m_next));
-                int waiters = m->_m_waiters;
-                int priv = (m->_m_type & 128) ^ 128;
-                self->robust_list.pending = rp;
-                self->robust_list.head = *rp;
-                int cont = a_swap(&m->_m_lock, self->tid|0x40000000);
-                self->robust_list.pending = 0;
-                if (cont < 0 || waiters)
-                        __wake(&m->_m_lock, 1, priv);
-        }
-        __vm_unlock();
-
-        __do_orphaned_stdio_locks();
-        __dl_thread_cleanup();
-
-        if (self->detached && self->map_base) {
-                /* Detached threads must avoid the kernel clear_child_tid
-                 * feature, since the virtual address will have been
-                 * unmapped and possibly already reused by a new mapping
-                 * at the time the kernel would perform the write. In
-                 * the case of threads that started out detached, the
-                 * initial clone flags are correct, but if the thread was
-                 * detached later (== 2), we need to clear it here. */
-                if (self->detached == 2) __syscall(SYS_set_tid_address, 0);
-
-                /* Robust list will no longer be valid, and was already
-                 * processed above, so unregister it with the kernel. */
-                if (self->robust_list.off)
-                        __syscall(SYS_set_robust_list, 0, 3*sizeof(long));
-
-                /* Since __unmapself bypasses the normal munmap code path,
-                 * explicitly wait for vmlock holders first. */
-                __vm_wait();
-
-                /* The following call unmaps the thread's stack mapping
-                 * and then exits without touching the stack. */
-                __unmapself(self->map_base, self->map_size);
-        }
-
-        for (;;) __syscall(SYS_exit, 0);
-}
-
-void __do_cleanup_push(struct __ptcb *cb)
-{
-        struct pthread *self = __pthread_self();
-        cb->__next = self->cancelbuf;
-        self->cancelbuf = cb;
-}
-
-void __do_cleanup_pop(struct __ptcb *cb)
-{
-        __pthread_self()->cancelbuf = cb->__next;
-}
-
-static int start(void *p)
-{
-        pthread_t self = p;
-        if (self->startlock[0]) {
-                __wait(self->startlock, 0, 1, 1);
-                if (self->startlock[0]) {
-                        self->detached = 2;
-                        pthread_exit(0);
-                }
-                __restore_sigs(self->sigmask);
-        }
-        if (self->unblock_cancel)
-                __syscall(SYS_rt_sigprocmask, SIG_UNBLOCK,
-                        SIGPT_SET, 0, _NSIG/8);
-        __pthread_exit(self->start(self->start_arg));
-        return 0;
-}
-
-static int start_c11(void *p)
-{
-        pthread_t self = p;
-        int (*start)(void*) = (int(*)(void*)) self->start;
-        __pthread_exit((void *)(uintptr_t)start(self->start_arg));
-        return 0;
-}
-
-#define ROUND(x) (((x)+PAGE_SIZE-1)&-PAGE_SIZE)
+_Noreturn void __pthread_exit(void* result) {
+  pthread_t self = __pthread_self();
+  sigset_t set;
+
+  self->canceldisable = 1;
+  self->cancelasync = 0;
+  self->result = result;
+
+  while (self->cancelbuf) {
+    void (*f)(void*) = self->cancelbuf->__f;
+    void* x = self->cancelbuf->__x;
+    self->cancelbuf = self->cancelbuf->__next;
+    f(x);
+  }
+
+  __pthread_tsd_run_dtors();
+
+  __lock(self->exitlock);
+
+  /* Mark this thread dead before decrementing count */
+  __lock(self->killlock);
+  self->dead = 1;
+
+  /* Block all signals before decrementing the live thread count.
+   * This is important to ensure that dynamically allocated TLS
+   * is not under-allocated/over-committed, and possibly for other
+   * reasons as well. */
+  __block_all_sigs(&set);
+
+  /* Wait to unlock the kill lock, which governs functions like
+   * pthread_kill which target a thread id, until signals have
+   * been blocked. This precludes observation of the thread id
+   * as a live thread (with application code running in it) after
+   * the thread was reported dead by ESRCH being returned. */
+  __unlock(self->killlock);
+
+  /* It's impossible to determine whether this is "the last thread"
+   * until performing the atomic decrement, since multiple threads
+   * could exit at the same time. For the last thread, revert the
+   * decrement and unblock signals to give the atexit handlers and
+   * stdio cleanup code a consistent state. */
+  if (a_fetch_add(&libc.threads_minus_1, -1) == 0) {
+    libc.threads_minus_1 = 0;
+    __restore_sigs(&set);
+    exit(0);
+  }
+
+  /* Process robust list in userspace to handle non-pshared mutexes
+   * and the detached thread case where the robust list head will
+   * be invalid when the kernel would process it. */
+  __vm_lock();
+  volatile void* volatile* rp;
+  while ((rp = self->robust_list.head) && rp != &self->robust_list.head) {
+    pthread_mutex_t* m =
+        (void*)((char*)rp - offsetof(pthread_mutex_t, _m_next));
+    int waiters = m->_m_waiters;
+    int priv = (m->_m_type & 128) ^ 128;
+    self->robust_list.pending = rp;
+    self->robust_list.head = *rp;
+    int cont = a_swap(&m->_m_lock, self->tid | 0x40000000);
+    self->robust_list.pending = 0;
+    if (cont < 0 || waiters)
+      __wake(&m->_m_lock, 1, priv);
+  }
+  __vm_unlock();
+
+  __do_orphaned_stdio_locks();
+  __dl_thread_cleanup();
+
+  if (self->detached && self->map_base) {
+    /* Detached threads must avoid the kernel clear_child_tid
+     * feature, since the virtual address will have been
+     * unmapped and possibly already reused by a new mapping
+     * at the time the kernel would perform the write. In
+     * the case of threads that started out detached, the
+     * initial clone flags are correct, but if the thread was
+     * detached later (== 2), we need to clear it here. */
+    if (self->detached == 2)
+      __syscall(SYS_set_tid_address, 0);
+
+    /* Robust list will no longer be valid, and was already
+     * processed above, so unregister it with the kernel. */
+    if (self->robust_list.off)
+      __syscall(SYS_set_robust_list, 0, 3 * sizeof(long));
+
+    /* Since __unmapself bypasses the normal munmap code path,
+     * explicitly wait for vmlock holders first. */
+    __vm_wait();
+
+    /* The following call unmaps the thread's stack mapping
+     * and then exits without touching the stack. */
+    __unmapself(self->map_base, self->map_size);
+  }
+
+  for (;;)
+    __syscall(SYS_exit, 0);
+}
+
+void __do_cleanup_push(struct __ptcb* cb) {
+  struct pthread* self = __pthread_self();
+  cb->__next = self->cancelbuf;
+  self->cancelbuf = cb;
+}
+
+void __do_cleanup_pop(struct __ptcb* cb) {
+  __pthread_self()->cancelbuf = cb->__next;
+}
+
+static int start(void* p) {
+  pthread_t self = p;
+  if (self->startlock[0]) {
+    __wait(self->startlock, 0, 1, 1);
+    if (self->startlock[0]) {
+      self->detached = 2;
+      pthread_exit(0);
+    }
+    __restore_sigs(self->sigmask);
+  }
+  if (self->unblock_cancel)
+    __syscall(SYS_rt_sigprocmask, SIG_UNBLOCK, SIGPT_SET, 0, _NSIG / 8);
+  __pthread_exit(self->start(self->start_arg));
+  return 0;
+}
+
+static int start_c11(void* p) {
+  pthread_t self = p;
+  int (*start)(void*) = (int (*)(void*))self->start;
+  __pthread_exit((void*)(uintptr_t)start(self->start_arg));
+  return 0;
+}
+
+#define ROUND(x) (((x) + PAGE_SIZE - 1) & -PAGE_SIZE)
 
 /* pthread_key_create.c overrides this */
 static volatile size_t dummy = 0;
 weak_alias(dummy, __pthread_tsd_size);
-static void *dummy_tsd[1] = { 0 };
+static void* dummy_tsd[1] = {0};
 weak_alias(dummy_tsd, __pthread_tsd_main);
 
 volatile int __block_new_threads = 0;
 
-static FILE *volatile dummy_file = 0;
+static FILE* volatile dummy_file = 0;
 weak_alias(dummy_file, __stdin_used);
 weak_alias(dummy_file, __stdout_used);
 weak_alias(dummy_file, __stderr_used);
 
-static void init_file_lock(FILE *f)
-{
-        if (f && f->lock<0) f->lock = 0;
-}
-
-void *__copy_tls(unsigned char *);
-
-int __pthread_create(pthread_t *restrict res, const pthread_attr_t *restrict attrp, void *(*entry)(void *), void *restrict arg)
-{
-        int ret, c11 = (attrp == __ATTRP_C11_THREAD);
-        size_t size, guard;
-        struct pthread *self, *new;
-        unsigned char *map = 0, *stack = 0, *tsd = 0, *stack_limit;
-        unsigned flags = CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND
-                | CLONE_THREAD | CLONE_SYSVSEM | CLONE_SETTLS
-                | CLONE_PARENT_SETTID | CLONE_CHILD_CLEARTID | CLONE_DETACHED;
-        int do_sched = 0;
-        pthread_attr_t attr = {0};
-
-        if (!libc.can_do_threads) return ENOSYS;
-        self = __pthread_self();
-        if (!libc.threaded) {
-                for (FILE *f=*__ofl_lock(); f; f=f->next)
-                        init_file_lock(f);
-                __ofl_unlock();
-                init_file_lock(__stdin_used);
-                init_file_lock(__stdout_used);
-                init_file_lock(__stderr_used);
-                __syscall(SYS_rt_sigprocmask, SIG_UNBLOCK, SIGPT_SET, 0, _NSIG/8);
-                self->tsd = (void **)__pthread_tsd_main;
-                libc.threaded = 1;
-        }
-        if (attrp && !c11) attr = *attrp;
-
-        __acquire_ptc();
-        if (__block_new_threads) __wait(&__block_new_threads, 0, 1, 1);
-
-        if (attr._a_stackaddr) {
-                size_t need = libc.tls_size + __pthread_tsd_size;
-                size = attr._a_stacksize + DEFAULT_STACK_SIZE;
-                stack = (void *)(attr._a_stackaddr & -16);
-                stack_limit = (void *)(attr._a_stackaddr - size);
-                /* Use application-provided stack for TLS only when
-                 * it does not take more than ~12% or 2k of the
-                 * application's stack space. */
-                if (need < size/8 && need < 2048) {
-                        tsd = stack - __pthread_tsd_size;
-                        stack = tsd - libc.tls_size;
-                        memset(stack, 0, need);
-                } else {
-                        size = ROUND(need);
-                        guard = 0;
-                }
-        } else {
-                guard = ROUND(DEFAULT_GUARD_SIZE + attr._a_guardsize);
-                size = guard + ROUND(DEFAULT_STACK_SIZE + attr._a_stacksize
-                        + libc.tls_size +  __pthread_tsd_size);
-        }
-
-        if (!tsd) {
-                if (guard) {
-                        map = __mmap(0, size, PROT_NONE, MAP_PRIVATE|MAP_ANON, -1, 0);
-                        if (map == MAP_FAILED) goto fail;
-                        if (__mprotect(map+guard, size-guard, PROT_READ|PROT_WRITE)
-                            && errno != ENOSYS) {
-                                __munmap(map, size);
-                                goto fail;
-                        }
-                } else {
-                        map = __mmap(0, size, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, -1, 0);
-                        if (map == MAP_FAILED) goto fail;
-                }
-                tsd = map + size - __pthread_tsd_size;
-                if (!stack) {
-                        stack = tsd - libc.tls_size;
-                        stack_limit = map + guard;
-                }
-        }
-
-        new = __copy_tls(tsd - libc.tls_size);
-        new->map_base = map;
-        new->map_size = size;
-        new->stack = stack;
-        new->stack_size = stack - stack_limit;
-        new->start = entry;
-        new->start_arg = arg;
-        new->self = new;
-        new->tsd = (void *)tsd;
-        new->locale = &libc.global_locale;
-        if (attr._a_detach) {
-                new->detached = 1;
-                flags -= CLONE_CHILD_CLEARTID;
-        }
-        if (attr._a_sched) {
-                do_sched = new->startlock[0] = 1;
-                __block_app_sigs(new->sigmask);
-        }
-        new->robust_list.head = &new->robust_list.head;
-        new->unblock_cancel = self->cancel;
-        new->CANARY = self->CANARY;
-
-        a_inc(&libc.threads_minus_1);
-        ret = __clone((c11 ? start_c11 : start), stack, flags, new, &new->tid, TP_ADJ(new), &new->tid);
-
-        __release_ptc();
-
-        if (do_sched) {
-                __restore_sigs(new->sigmask);
-        }
-
-        if (ret < 0) {
-                a_dec(&libc.threads_minus_1);
-                if (map) __munmap(map, size);
-                return EAGAIN;
-        }
-
-        if (do_sched) {
-                ret = __syscall(SYS_sched_setscheduler, new->tid,
-                        attr._a_policy, &attr._a_prio);
-                a_store(new->startlock, ret<0 ? 2 : 0);
-                __wake(new->startlock, 1, 1);
-                if (ret < 0) return -ret;
-        }
-
-        *res = new;
-        return 0;
+static void init_file_lock(FILE* f) {
+  if (f && f->lock < 0)
+    f->lock = 0;
+}
+
+void* __copy_tls(unsigned char*);
+
+int __pthread_create(pthread_t* restrict res,
+                     const pthread_attr_t* restrict attrp,
+                     void* (*entry)(void*),
+                     void* restrict arg) {
+  int ret, c11 = (attrp == __ATTRP_C11_THREAD);
+  size_t size, guard;
+  struct pthread *self, *new;
+  unsigned char *map = 0, *stack = 0, *tsd = 0, *stack_limit;
+  unsigned flags = CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND |
+                   CLONE_THREAD | CLONE_SYSVSEM | CLONE_SETTLS |
+                   CLONE_PARENT_SETTID | CLONE_CHILD_CLEARTID | CLONE_DETACHED;
+  int do_sched = 0;
+  pthread_attr_t attr = {0};
+
+  if (!libc.can_do_threads)
+    return ENOSYS;
+  self = __pthread_self();
+  if (!libc.threaded) {
+    for (FILE* f = *__ofl_lock(); f; f = f->next)
+      init_file_lock(f);
+    __ofl_unlock();
+    init_file_lock(__stdin_used);
+    init_file_lock(__stdout_used);
+    init_file_lock(__stderr_used);
+    __syscall(SYS_rt_sigprocmask, SIG_UNBLOCK, SIGPT_SET, 0, _NSIG / 8);
+    self->tsd = (void**)__pthread_tsd_main;
+    libc.threaded = 1;
+  }
+  if (attrp && !c11)
+    attr = *attrp;
+
+  __acquire_ptc();
+  if (__block_new_threads)
+    __wait(&__block_new_threads, 0, 1, 1);
+
+  if (attr._a_stackaddr) {
+    size_t need = libc.tls_size + __pthread_tsd_size;
+    size = attr._a_stacksize + DEFAULT_STACK_SIZE;
+    stack = (void*)(attr._a_stackaddr & -16);
+    stack_limit = (void*)(attr._a_stackaddr - size);
+    /* Use application-provided stack for TLS only when
+     * it does not take more than ~12% or 2k of the
+     * application's stack space. */
+    if (need < size / 8 && need < 2048) {
+      tsd = stack - __pthread_tsd_size;
+      stack = tsd - libc.tls_size;
+      memset(stack, 0, need);
+    } else {
+      size = ROUND(need);
+      guard = 0;
+    }
+  } else {
+    guard = ROUND(DEFAULT_GUARD_SIZE + attr._a_guardsize);
+    size = guard + ROUND(DEFAULT_STACK_SIZE + attr._a_stacksize +
+                         libc.tls_size + __pthread_tsd_size);
+  }
+
+  if (!tsd) {
+    if (guard) {
+      map = __mmap(0, size, PROT_NONE, MAP_PRIVATE | MAP_ANON, -1, 0);
+      if (map == MAP_FAILED)
+        goto fail;
+      if (__mprotect(map + guard, size - guard, PROT_READ | PROT_WRITE) &&
+          errno != ENOSYS) {
+        __munmap(map, size);
+        goto fail;
+      }
+    } else {
+      map = __mmap(0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1,
+                   0);
+      if (map == MAP_FAILED)
+        goto fail;
+    }
+    tsd = map + size - __pthread_tsd_size;
+    if (!stack) {
+      stack = tsd - libc.tls_size;
+      stack_limit = map + guard;
+    }
+  }
+
+  new = __copy_tls(tsd - libc.tls_size);
+  new->map_base = map;
+  new->map_size = size;
+  new->stack = stack;
+  new->stack_size = stack - stack_limit;
+  new->start = entry;
+  new->start_arg = arg;
+  new->self = new;
+  new->tsd = (void*)tsd;
+  new->locale = &libc.global_locale;
+  if (attr._a_detach) {
+    new->detached = 1;
+    flags -= CLONE_CHILD_CLEARTID;
+  }
+  if (attr._a_sched) {
+    do_sched = new->startlock[0] = 1;
+    __block_app_sigs(new->sigmask);
+  }
+  new->robust_list.head = &new->robust_list.head;
+  new->unblock_cancel = self->cancel;
+  new->CANARY = self->CANARY;
+
+  a_inc(&libc.threads_minus_1);
+  ret = __clone((c11 ? start_c11 : start), stack, flags, new, &new->tid,
+                TP_ADJ(new), &new->tid);
+
+  __release_ptc();
+
+  if (do_sched) {
+    __restore_sigs(new->sigmask);
+  }
+
+  if (ret < 0) {
+    a_dec(&libc.threads_minus_1);
+    if (map)
+      __munmap(map, size);
+    return EAGAIN;
+  }
+
+  if (do_sched) {
+    ret = __syscall(SYS_sched_setscheduler, new->tid, attr._a_policy,
+                    &attr._a_prio);
+    a_store(new->startlock, ret < 0 ? 2 : 0);
+    __wake(new->startlock, 1, 1);
+    if (ret < 0)
+      return -ret;
+  }
+
+  *res = new;
+  return 0;
 fail:
-        __release_ptc();
-        return EAGAIN;
+  __release_ptc();
+  return EAGAIN;
 }
 
 weak_alias(__pthread_exit, pthread_exit);
 weak_alias(__pthread_create, pthread_create);