GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/librthread/rthread_np.c Lines: 2 31 6.5 %
Date: 2017-11-13 Branches: 0 18 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: rthread_np.c,v 1.20 2017/09/05 02:40:54 guenther Exp $	*/
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/*
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 * Copyright (c) 2004,2005 Ted Unangst <tedu@openbsd.org>
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 * Copyright (c) 2005 Otto Moerbeek <otto@openbsd.org>
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 * All Rights Reserved.
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/lock.h>
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#include <sys/resource.h>
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#include <sys/queue.h>
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#include <sys/sysctl.h>
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#include <errno.h>
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#include <pthread.h>
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#include <pthread_np.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <string.h>
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#include <tib.h>
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#include <unistd.h>
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#include "rthread.h"
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REDIRECT_SYSCALL(sysctl);
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void
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pthread_set_name_np(pthread_t thread, const char *name)
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{
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	strlcpy(thread->name, name, sizeof(thread->name));
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}
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int
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pthread_main_np(void)
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{
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	return (!_threads_ready ||
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	    (TIB_GET()->tib_thread_flags & TIB_THREAD_INITIAL_STACK) ? 1 : 0);
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}
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/*
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 * Return stack info from the given thread.  Based upon the solaris
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 * thr_stksegment function.  Note that the returned ss_sp member is the
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 * *top* of the allocated stack area, unlike in sigaltstack() where
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 * it's the bottom.  You'll have to ask Sun what they were thinking...
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 *
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 * This function taken from the uthread library, with the following
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 * license:
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 * PUBLIC DOMAIN: No Rights Reserved. Marco S Hyman <marc@snafu.org> */
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int
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pthread_stackseg_np(pthread_t thread, stack_t *sinfo)
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{
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	if (thread->stack) {
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#ifdef MACHINE_STACK_GROWS_UP
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		sinfo->ss_sp = thread->stack->base;
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#else
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		sinfo->ss_sp = (char *)thread->stack->base +
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		    thread->stack->len;
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#endif
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		sinfo->ss_size = thread->stack->len;
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		if (thread->stack->guardsize != 1)
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			sinfo->ss_size -= thread->stack->guardsize;
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		sinfo->ss_flags = 0;
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		return (0);
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	} else if (thread->tib->tib_thread_flags & TIB_THREAD_INITIAL_STACK) {
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		static struct _ps_strings _ps;
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		static struct rlimit rl;
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		static int gotself;
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		if (!_threads_ready)		/* for ROUND_TO_PAGE */
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			_rthread_init();
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		if (gotself == 0) {
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			int mib[2];
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			size_t len;
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			if (getrlimit(RLIMIT_STACK, &rl) != 0)
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				return (EAGAIN);
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			mib[0] = CTL_VM;
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			mib[1] = VM_PSSTRINGS;
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			len = sizeof(_ps);
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			if (sysctl(mib, 2, &_ps, &len, NULL, 0) != 0)
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				return (EAGAIN);
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			gotself = 1;
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		}
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		/*
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		 * Provides a rough estimation of stack bounds.   Caller
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		 * likely wants to know for the purpose of inspecting call
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		 * frames, but VM_PSSTRINGS points to process arguments...
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		 */
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#ifdef MACHINE_STACK_GROWS_UP
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		sinfo->ss_sp = _ps.val;
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#else
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		sinfo->ss_sp = (void *)ROUND_TO_PAGE((uintptr_t)_ps.val);
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#endif
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		sinfo->ss_size = (size_t)rl.rlim_cur;
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		sinfo->ss_flags = 0;
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		return (0);
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	}
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	return (EAGAIN);
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}