From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.org/gmane.linux.lib.musl.general/4698 Path: news.gmane.org!not-for-mail From: Rich Felker Newsgroups: gmane.linux.lib.musl.general Subject: Re: Build on linux 2.6 and run on linux 2.4? Date: Fri, 21 Mar 2014 14:02:04 -0400 Message-ID: <20140321180204.GL26358@brightrain.aerifal.cx> References: <20140320231412.GG26358@brightrain.aerifal.cx> Reply-To: musl@lists.openwall.com NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1395424934 25151 80.91.229.3 (21 Mar 2014 18:02:14 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 21 Mar 2014 18:02:14 +0000 (UTC) Cc: musl To: John Mudd Original-X-From: musl-return-4702-gllmg-musl=m.gmane.org@lists.openwall.com Fri Mar 21 19:02:24 2014 Return-path: Envelope-to: gllmg-musl@plane.gmane.org Original-Received: from mother.openwall.net ([195.42.179.200]) by plane.gmane.org with smtp (Exim 4.69) (envelope-from ) id 1WR3lr-0003I4-0V for gllmg-musl@plane.gmane.org; Fri, 21 Mar 2014 19:02:19 +0100 Original-Received: (qmail 28016 invoked by uid 550); 21 Mar 2014 18:02:18 -0000 Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: Original-Received: (qmail 28006 invoked from network); 21 Mar 2014 18:02:18 -0000 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Xref: news.gmane.org gmane.linux.lib.musl.general:4698 Archived-At: On Fri, Mar 21, 2014 at 01:54:34PM -0400, John Mudd wrote: > Here is the regular and strace output on 2.4 kernel, more specifically > Linux 2.4.21-4.EL #1 Fri Oct 3 18:13:58 EDT 2003 i686 i686 i386 GNU/Linux. > > $ test_threads2 > Counter value functionCount1: 1 > Counter value functionCount1: 2 > Counter value functionCount1: 3 > Counter value functionCount2: 4 > Counter value functionCount2: 5 > Counter value functionCount2: 6 > Counter value functionCount2: 7 > Counter value functionCount1: 8 > Counter value functionCount1: 9 > Counter value functionCount1: 10 > Final count: 10 > $ > > $ strace test_threads2 > execve("/home/jmudd/test_threads2", ["test_threads2"], [/* 26 vars */]) = 0 > rt_sigprocmask(SIG_UNBLOCK, [RT_1 RT_2], NULL, 8) = 0 > set_thread_area({entry_number:-1 -> 6, base_addr:0x804e540, limit:1048575, > seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, > seg_not_present:0, useable:1}) = 0 > set_tid_address(0x804e558) = 25884 > mmap2(NULL, 90112, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb75ea000 > mprotect(0xb75eb000, 86016, PROT_READ|PROT_WRITE) = 0 > clone(child_stack=0xb75fff30, > flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID|CLONE_DETACHED, > parent_tidptr=0xb75fff58, {entry_number:6, base_addr:0xb75fff40, > limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, > seg_not_present:0, useable:1}, child_tidptr=0xb75fff58) = 25885 > mmap2(NULL, 90112, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb75d4000 > mprotect(0xb75d5000, 86016, PROT_READ|PROT_WRITE) = 0 > clone(child_stack=0xb75e9f30, > flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID|CLONE_DETACHED, > parent_tidptr=0xb75e9f58, {entry_number:6, base_addr:0xb75e9f40, > limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, > seg_not_present:0, useable:1}, child_tidptr=0xb75e9f58) = 25886 > futex(0xb75fff58, FUTEX_WAIT, 25885, NULLCounter value functionCount1: 1 > Counter value functionCount1: 2 > Counter value functionCount1: 3 > Counter value functionCount2: 4 > Counter value functionCount2: 5 > Counter value functionCount2: 6 > Counter value functionCount2: 7 > Counter value functionCount1: 8 > Counter value functionCount1: 9 > Counter value functionCount1: 10 > ) = 0 > munmap(0xb75ea000, 90112) = 0 > munmap(0xb75d4000, 90112) = 0 > writev(1, [{"Final count: 10", 15}, {"\n", 1}], 2Final count: 10 > ) = 16 > exit_group(0) = ? > $ Is this a stock 2.4.x kernel or a distro-modified one that might have things backported from 2.6? Can you re-run the strace with: strace -f -o logfile test_threads2 -f is needed to trace anything but the main thread/original process, and -o to a file produces nicer output (pid/tid on each line) than the usual default. Rich