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authorPetter Rodhelind <petter.rodhelind@gmail.com>2021-02-18 20:21:24 +0100
committerPetter Rodhelind <petter.rodhelind@gmail.com>2021-02-18 20:21:24 +0100
commit181d56ee64da53279bb6ecf49c24ab54cfb7193f (patch)
treefc6c8736bb97790a257c5514998c583ffce7c41c /src/libthread
parent94c521bf102a74aec7e1a5c3a9ef5eaa968d4e14 (diff)
parent90971376a5e8620fc62579aa1b3be26245ec8c06 (diff)
downloadplan9port-master.tar.gz
plan9port-master.tar.bz2
plan9port-master.zip
Merge remote-tracking branch 'upstream/master'HEADmaster
Diffstat (limited to 'src/libthread')
-rw-r--r--src/libthread/386-ucontext.c22
-rw-r--r--src/libthread/386-ucontext.h119
-rw-r--r--src/libthread/COPYING.SPARC64-CONTEXT458
-rw-r--r--src/libthread/COPYRIGHT9
-rw-r--r--src/libthread/Linux-arm-asm.s41
-rw-r--r--src/libthread/Linux-sparc64-context.S135
-rw-r--r--src/libthread/NetBSD-386-asm.s7
-rw-r--r--src/libthread/NetBSD-power-asm.s16
-rw-r--r--src/libthread/NetBSD.c437
-rw-r--r--src/libthread/OpenBSD-386-asm.s45
-rw-r--r--src/libthread/OpenBSD-power-asm.S73
-rw-r--r--src/libthread/OpenBSD-x86_64-asm.S44
-rw-r--r--src/libthread/arm-ucontext.c24
-rw-r--r--src/libthread/bg.c7
-rw-r--r--src/libthread/daemonize.c19
-rw-r--r--src/libthread/mkfile4
-rw-r--r--src/libthread/power-ucontext.c26
-rw-r--r--src/libthread/power-ucontext.h36
-rw-r--r--src/libthread/sparc64-ucontext.c49
-rw-r--r--src/libthread/stkmalloc.c13
-rw-r--r--src/libthread/stkmmap.c25
-rw-r--r--src/libthread/sysofiles.sh28
-rw-r--r--src/libthread/thread.c378
-rw-r--r--src/libthread/threadimpl.h46
-rw-r--r--src/libthread/x86_64-ucontext.c28
-rw-r--r--src/libthread/x86_64-ucontext.h42
26 files changed, 153 insertions, 1978 deletions
diff --git a/src/libthread/386-ucontext.c b/src/libthread/386-ucontext.c
deleted file mode 100644
index 3afa9513..00000000
--- a/src/libthread/386-ucontext.c
+++ /dev/null
@@ -1,22 +0,0 @@
-#include "threadimpl.h"
-
-void
-makecontext(ucontext_t *ucp, void (*func)(void), int argc, ...)
-{
- int *sp;
-
- sp = USPALIGN(ucp, 4);
- sp -= argc;
- memmove(sp, &argc+1, argc*sizeof(int));
- *--sp = 0; /* return address */
- ucp->uc_mcontext.mc_eip = (long)func;
- ucp->uc_mcontext.mc_esp = (int)sp;
-}
-
-int
-swapcontext(ucontext_t *oucp, ucontext_t *ucp)
-{
- if(getcontext(oucp) == 0)
- setcontext(ucp);
- return 0;
-}
diff --git a/src/libthread/386-ucontext.h b/src/libthread/386-ucontext.h
deleted file mode 100644
index b1ee81b3..00000000
--- a/src/libthread/386-ucontext.h
+++ /dev/null
@@ -1,119 +0,0 @@
-#define setcontext(u) setmcontext(&(u)->uc_mcontext)
-#define getcontext(u) getmcontext(&(u)->uc_mcontext)
-typedef struct mcontext mcontext_t;
-typedef struct ucontext ucontext_t;
-
-extern int swapcontext(ucontext_t*, ucontext_t*);
-extern void makecontext(ucontext_t*, void(*)(), int, ...);
-extern int getmcontext(mcontext_t*);
-extern void setmcontext(mcontext_t*);
-
-/*-
- * Copyright (c) 1999 Marcel Moolenaar
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer
- * in this position and unchanged.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * $FreeBSD: src/sys/sys/ucontext.h,v 1.4 1999/10/11 20:33:17 luoqi Exp $
- */
-
-/* #include <machine/ucontext.h> */
-
-/*-
- * Copyright (c) 1999 Marcel Moolenaar
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer
- * in this position and unchanged.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * $FreeBSD: src/sys/i386/include/ucontext.h,v 1.4 1999/10/11 20:33:09 luoqi Exp $
- */
-
-struct mcontext {
- /*
- * The first 20 fields must match the definition of
- * sigcontext. So that we can support sigcontext
- * and ucontext_t at the same time.
- */
- int mc_onstack; /* XXX - sigcontext compat. */
- int mc_gs;
- int mc_fs;
- int mc_es;
- int mc_ds;
- int mc_edi;
- int mc_esi;
- int mc_ebp;
- int mc_isp;
- int mc_ebx;
- int mc_edx;
- int mc_ecx;
- int mc_eax;
- int mc_trapno;
- int mc_err;
- int mc_eip;
- int mc_cs;
- int mc_eflags;
- int mc_esp; /* machine state */
- int mc_ss;
-
- int mc_fpregs[28]; /* env87 + fpacc87 + u_long */
- int __spare__[17];
-};
-
-struct ucontext {
- /*
- * Keep the order of the first two fields. Also,
- * keep them the first two fields in the structure.
- * This way we can have a union with struct
- * sigcontext and ucontext_t. This allows us to
- * support them both at the same time.
- * note: the union is not defined, though.
- */
- sigset_t uc_sigmask;
- mcontext_t uc_mcontext;
-
- struct __ucontext *uc_link;
- stack_t uc_stack;
- int __spare__[8];
-};
diff --git a/src/libthread/COPYING.SPARC64-CONTEXT b/src/libthread/COPYING.SPARC64-CONTEXT
deleted file mode 100644
index 3b204400..00000000
--- a/src/libthread/COPYING.SPARC64-CONTEXT
+++ /dev/null
@@ -1,458 +0,0 @@
- GNU LESSER GENERAL PUBLIC LICENSE
- Version 2.1, February 1999
-
- Copyright (C) 1991, 1999 Free Software Foundation, Inc.
- 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
-[This is the first released version of the Lesser GPL. It also counts
- as the successor of the GNU Library Public License, version 2, hence
- the version number 2.1.]
-
- Preamble
-
- The licenses for most software are designed to take away your
-freedom to share and change it. By contrast, the GNU General Public
-Licenses are intended to guarantee your freedom to share and change
-free software--to make sure the software is free for all its users.
-
- This license, the Lesser General Public License, applies to some
-specially designated software packages--typically libraries--of the
-Free Software Foundation and other authors who decide to use it. You
-can use it too, but we suggest you first think carefully about whether
-this license or the ordinary General Public License is the better
-strategy to use in any particular case, based on the explanations below.
-
- When we speak of free software, we are referring to freedom of use,
-not price. Our General Public Licenses are designed to make sure that
-you have the freedom to distribute copies of free software (and charge
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-
- 12. If the distribution and/or use of the Library is restricted in
-certain countries either by patents or by copyrighted interfaces, the
-original copyright holder who places the Library under this License may add
-an explicit geographical distribution limitation excluding those countries,
-so that distribution is permitted only in or among countries not thus
-excluded. In such case, this License incorporates the limitation as if
-written in the body of this License.
-
- 13. The Free Software Foundation may publish revised and/or new
-versions of the Lesser General Public License from time to time.
-Such new versions will be similar in spirit to the present version,
-but may differ in detail to address new problems or concerns.
-
-Each version is given a distinguishing version number. If the Library
-specifies a version number of this License which applies to it and
-"any later version", you have the option of following the terms and
-conditions either of that version or of any later version published by
-the Free Software Foundation. If the Library does not specify a
-license version number, you may choose any version ever published by
-the Free Software Foundation.
-
- 14. If you wish to incorporate parts of the Library into other free
-programs whose distribution conditions are incompatible with these,
-write to the author to ask for permission. For software which is
-copyrighted by the Free Software Foundation, write to the Free
-Software Foundation; we sometimes make exceptions for this. Our
-decision will be guided by the two goals of preserving the free status
-of all derivatives of our free software and of promoting the sharing
-and reuse of software generally.
-
- NO WARRANTY
-
- 15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
-WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
-EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
-OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
-KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
-IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
-LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
-THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
-
- 16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
-WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
-AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
-FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
-CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
-LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
-RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
-FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
-SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
-DAMAGES.
-
- END OF TERMS AND CONDITIONS
diff --git a/src/libthread/COPYRIGHT b/src/libthread/COPYRIGHT
index d0820965..212b96bc 100644
--- a/src/libthread/COPYRIGHT
+++ b/src/libthread/COPYRIGHT
@@ -42,12 +42,3 @@ Contains parts of an earlier library that has:
* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
* OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
*/
-
-===
-
-The above notices do *NOT* apply to Linux-sparc64-context.S
-or to sparc64-ucontext.c. Those are functions from
-the GNU C library and are provided for systems that use the GNU C
-library but somehow are missing those functions. They are
-distributed under the Lesser GPL; see COPYING.SPARC64-CONTEXT.
-
diff --git a/src/libthread/Linux-arm-asm.s b/src/libthread/Linux-arm-asm.s
deleted file mode 100644
index 9bd54f8a..00000000
--- a/src/libthread/Linux-arm-asm.s
+++ /dev/null
@@ -1,41 +0,0 @@
-.globl mygetmcontext
-mygetmcontext:
- str r1, [r0,#4]
- str r2, [r0,#8]
- str r3, [r0,#12]
- str r4, [r0,#16]
- str r5, [r0,#20]
- str r6, [r0,#24]
- str r7, [r0,#28]
- str r8, [r0,#32]
- str r9, [r0,#36]
- str r10, [r0,#40]
- str r11, [r0,#44]
- str r12, [r0,#48]
- str r13, [r0,#52]
- str r14, [r0,#56]
- /* store 1 as r0-to-restore */
- mov r1, #1
- str r1, [r0]
- /* return 0 */
- mov r0, #0
- mov pc, lr
-
-.globl mysetmcontext
-mysetmcontext:
- ldr r1, [r0,#4]
- ldr r2, [r0,#8]
- ldr r3, [r0,#12]
- ldr r4, [r0,#16]
- ldr r5, [r0,#20]
- ldr r6, [r0,#24]
- ldr r7, [r0,#28]
- ldr r8, [r0,#32]
- ldr r9, [r0,#36]
- ldr r10, [r0,#40]
- ldr r11, [r0,#44]
- ldr r12, [r0,#48]
- ldr r13, [r0,#52]
- ldr r14, [r0,#56]
- ldr r0, [r0]
- mov pc, lr
diff --git a/src/libthread/Linux-sparc64-context.S b/src/libthread/Linux-sparc64-context.S
deleted file mode 100644
index 1cc38391..00000000
--- a/src/libthread/Linux-sparc64-context.S
+++ /dev/null
@@ -1,135 +0,0 @@
-/* Copyright (C) 2001 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Jakub Jelinek <jakub@redhat.com>.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-/* Constants shared between setcontext() and getcontext(). Don't
- install this header file. */
-
-
-#define UC_LINK 0
-#define __UC_SIGMASK 16
-#define UC_M_PC 40
-#define UC_M_NPC 48
-#define UC_SIGMASK 536
-#define SIGMASK_WORDS 16
-
-/* Copyright (C) 1997, 2001 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Richard Henderson (rth@tamu.edu).
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-#define ENTRY(x) x:
-#define END(x)
-
-/*#include "ucontext_i.h" (up above) */
-
-/* int getcontext(ucontext_t *); */
-
-ENTRY(getcontext)
-
- ldx [%o0 + UC_LINK], %o1 /* Preserve uc_link field, the
- trap clears it. */
- ta 0x6e
-1:
- ldx [%o0 + UC_M_PC], %o2
- ldx [%o0 + UC_M_NPC], %o3
- ldx [%o0 + __UC_SIGMASK], %o4
- stx %o1, [%o0 + UC_LINK]
- add %o2, 2f - 1b, %o2
- stx %o2, [%o0 + UC_M_PC]
- add %o3, 2f - 1b, %o3
- stx %o3, [%o0 + UC_M_NPC]
-#if SIGMASK_WORDS == 16
- stx %o4, [%o0 + UC_SIGMASK]
- stx %g0, [%o0 + UC_SIGMASK + 8]
- stx %g0, [%o0 + UC_SIGMASK + 16]
- stx %g0, [%o0 + UC_SIGMASK + 24]
- stx %g0, [%o0 + UC_SIGMASK + 32]
- stx %g0, [%o0 + UC_SIGMASK + 40]
- stx %g0, [%o0 + UC_SIGMASK + 48]
- stx %g0, [%o0 + UC_SIGMASK + 56]
- stx %g0, [%o0 + UC_SIGMASK + 64]
- stx %g0, [%o0 + UC_SIGMASK + 72]
- stx %g0, [%o0 + UC_SIGMASK + 80]
- stx %g0, [%o0 + UC_SIGMASK + 88]
- stx %g0, [%o0 + UC_SIGMASK + 96]
- stx %g0, [%o0 + UC_SIGMASK + 104]
- stx %g0, [%o0 + UC_SIGMASK + 112]
- stx %g0, [%o0 + UC_SIGMASK + 120]
-#else
-# error Adjust getcontext
-#endif
-2:
- retl
- clr %o0
-
-END(getcontext)
-
-/* Copyright (C) 1997, 2001 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Richard Henderson (rth@tamu.edu).
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-/*
-#include <sysdep.h>
-#include "ucontext_i.h"
-*/
-
-/* int setcontext(ucontext_t *ctx); */
-.weak setcontext
-ENTRY(setcontext)
-
- mov 1, %o1
-
-/* int __setcontext(ucontext_t *ctx, int restoremask); */
-ENTRY(__setcontext)
-
- ldx [%o0 + UC_SIGMASK], %o2
- stx %o2, [%o0 + __UC_SIGMASK]
- ta 0x6f
-
-END(__setcontext)
-
diff --git a/src/libthread/NetBSD-386-asm.s b/src/libthread/NetBSD-386-asm.s
deleted file mode 100644
index 197f12b5..00000000
--- a/src/libthread/NetBSD-386-asm.s
+++ /dev/null
@@ -1,7 +0,0 @@
-.globl _tas
-_tas:
- movl $0xCAFEBABE, %eax
- movl 4(%esp), %ecx
- xchgl %eax, 0(%ecx)
- ret
-
diff --git a/src/libthread/NetBSD-power-asm.s b/src/libthread/NetBSD-power-asm.s
deleted file mode 100644
index d6e21c15..00000000
--- a/src/libthread/NetBSD-power-asm.s
+++ /dev/null
@@ -1,16 +0,0 @@
- .globl _tas
-_tas:
- li %r0, 0
- mr %r4, %r3
- lis %r5, 0xcafe
- ori %r5, %r5, 0xbabe
-1:
- lwarx %r3, %r0, %r4
- cmpwi %r3, 0
- bne 2f
- stwcx. %r5, %r0, %r4
- bne- 1b
-2:
- sync
- blr
-
diff --git a/src/libthread/NetBSD.c b/src/libthread/NetBSD.c
deleted file mode 100644
index 2b14146b..00000000
--- a/src/libthread/NetBSD.c
+++ /dev/null
@@ -1,437 +0,0 @@
-#include "threadimpl.h"
-
-#undef exits
-#undef _exits
-
-static int
-timefmt(Fmt *fmt)
-{
- static char *mon[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
- "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
- vlong ns;
- Tm tm;
- ns = nsec();
- tm = *localtime(time(0));
- return fmtprint(fmt, "%s %2d %02d:%02d:%02d.%03d",
- mon[tm.mon], tm.mday, tm.hour, tm.min, tm.sec,
- (int)(ns%1000000000)/1000000);
-}
-
-/*
- * spin locks
- */
-extern int _tas(int*);
-
-void
-_threadunlock(Lock *l, ulong pc)
-{
- USED(pc);
-
- l->held = 0;
-}
-
-int
-_threadlock(Lock *l, int block, ulong pc)
-{
- int i;
-static int first=1;
-if(first) {first=0; fmtinstall('\001', timefmt);}
-
- USED(pc);
-
- /* once fast */
- if(!_tas(&l->held))
- return 1;
- if(!block)
- return 0;
-
- /* a thousand times pretty fast */
- for(i=0; i<1000; i++){
- if(!_tas(&l->held))
- return 1;
- sched_yield();
- }
- /* now increasingly slow */
- for(i=0; i<10; i++){
- if(!_tas(&l->held))
- return 1;
- usleep(1);
- }
-fprint(2, "%\001 %s: lock loop1 %p from %lux\n", argv0, l, pc);
- for(i=0; i<10; i++){
- if(!_tas(&l->held))
- return 1;
- usleep(10);
- }
-fprint(2, "%\001 %s: lock loop2 %p from %lux\n", argv0, l, pc);
- for(i=0; i<10; i++){
- if(!_tas(&l->held))
- return 1;
- usleep(100);
- }
-fprint(2, "%\001 %s: lock loop3 %p from %lux\n", argv0, l, pc);
- for(i=0; i<10; i++){
- if(!_tas(&l->held))
- return 1;
- usleep(1000);
- }
-fprint(2, "%\001 %s: lock loop4 %p from %lux\n", argv0, l, pc);
- for(i=0; i<10; i++){
- if(!_tas(&l->held))
- return 1;
- usleep(10*1000);
- }
-fprint(2, "%\001 %s: lock loop5 %p from %lux\n", argv0, l, pc);
- for(i=0; i<1000; i++){
- if(!_tas(&l->held))
- return 1;
- usleep(100*1000);
- }
-fprint(2, "%\001 %s: lock loop6 %p from %lux\n", argv0, l, pc);
- /* take your time */
- while(_tas(&l->held))
- usleep(1000*1000);
- return 1;
-}
-
-/*
- * sleep and wakeup
- */
-static void
-ign(int x)
-{
- USED(x);
-}
-
-static void /*__attribute__((constructor))*/
-ignusr1(int restart)
-{
- struct sigaction sa;
-
- memset(&sa, 0, sizeof sa);
- sa.sa_handler = ign;
- sigemptyset(&sa.sa_mask);
- sigaddset(&sa.sa_mask, SIGUSR1);
- if(restart)
- sa.sa_flags = SA_RESTART;
- sigaction(SIGUSR1, &sa, nil);
-}
-
-void
-_procsleep(_Procrendez *r)
-{
- sigset_t mask;
-
- /*
- * Go to sleep.
- *
- * Block USR1, set the handler to interrupt system calls,
- * unlock the vouslock so our waker can wake us,
- * and then suspend.
- */
-again:
- r->asleep = 1;
- r->pid = getpid();
-
- sigprocmask(SIG_SETMASK, nil, &mask);
- sigaddset(&mask, SIGUSR1);
- sigprocmask(SIG_SETMASK, &mask, nil);
- ignusr1(0);
- unlock(r->l);
- sigdelset(&mask, SIGUSR1);
- sigsuspend(&mask);
-
- /*
- * We're awake. Make USR1 not interrupt system calls.
- */
- lock(r->l);
- ignusr1(1);
- if(r->asleep && r->pid == getpid()){
- /* Didn't really wake up - signal from something else */
- goto again;
- }
-}
-
-void
-_procwakeupandunlock(_Procrendez *r)
-{
- int pid;
-
- pid = 0;
- if(r->asleep){
- r->asleep = 0;
- assert(r->pid >= 1);
- pid = r->pid;
- }
- assert(r->l);
- unlock(r->l);
- if(pid)
- kill(pid, SIGUSR1);
-}
-
-/*
- * process creation and exit
- */
-typedef struct Stackfree Stackfree;
-struct Stackfree
-{
- Stackfree *next;
- int pid;
- int pid1;
-};
-static Lock stacklock;
-static Stackfree *stackfree;
-
-static void
-delayfreestack(uchar *stk, int pid, int pid1)
-{
- Stackfree *sf;
-
- sf = (Stackfree*)stk;
- sf->pid = pid;
- sf->pid1 = pid1;
- lock(&stacklock);
- sf->next = stackfree;
- stackfree = sf;
- unlock(&stacklock);
-}
-
-static void
-dofreestacks(void)
-{
- Stackfree *sf, *last, *next;
-
- if(stackfree==nil || !canlock(&stacklock))
- return;
-
- for(last=nil,sf=stackfree; sf; last=sf,sf=next){
- next = sf->next;
- if(sf->pid >= 1 && kill(sf->pid, 0) < 0 && errno == ESRCH)
- if(sf->pid1 >= 1 && kill(sf->pid1, 0) < 0 && errno == ESRCH){
- free(sf);
- if(last)
- last->next = next;
- else
- stackfree = next;
- sf = last;
- }
- }
- unlock(&stacklock);
-}
-
-static int
-startprocfn(void *v)
-{
- void **a;
- uchar *stk;
- void (*fn)(void*);
- Proc *p;
- int pid0, pid1;
-
- a = (void**)v;
- fn = a[0];
- p = a[1];
- stk = a[2];
- pid0 = (int)a[4];
- pid1 = getpid();
- free(a);
- p->osprocid = pid1;
-
- (*fn)(p);
-
- delayfreestack(stk, pid0, pid1);
- _exit(0);
- return 0;
-}
-
-/*
- * indirect through here so that parent need not wait for child zombie
- *
- * slight race - if child exits and then another process starts before we
- * manage to exit, we'll be running on a freed stack.
- */
-static int
-trampnowait(void *v)
-{
- void **a;
- int *kidpid;
-
- a = (void*)v;
- kidpid = a[3];
- a[4] = (void*)getpid();
- *kidpid = clone(startprocfn, a[2]+65536-512, CLONE_VM|CLONE_FILES, a);
- _exit(0);
- return 0;
-}
-
-void
-_procstart(Proc *p, void (*fn)(Proc*))
-{
- void **a;
- uchar *stk;
- int pid, kidpid, status;
-
- dofreestacks();
- a = malloc(5*sizeof a[0]);
- if(a == nil)
- sysfatal("_procstart malloc: %r");
- stk = malloc(65536);
- if(stk == nil)
- sysfatal("_procstart malloc stack: %r");
-
- a[0] = fn;
- a[1] = p;
- a[2] = stk;
- a[3] = &kidpid;
- kidpid = -1;
-
- pid = clone(trampnowait, stk+65536-16, CLONE_VM|CLONE_FILES, a);
- if(pid > 0)
- if(wait4(pid, &status, __WALL, 0) < 0)
- fprint(2, "ffork wait4: %r\n");
- if(pid < 0 || kidpid < 0){
- fprint(2, "_procstart clone: %r\n");
- abort();
- }
-}
-
-static char *threadexitsmsg;
-void
-sigusr2handler(int s)
-{
-/* fprint(2, "%d usr2 %d\n", time(0), getpid()); */
- if(threadexitsmsg)
- _exits(threadexitsmsg);
-}
-
-void
-threadexitsall(char *msg)
-{
- static int pid[1024];
- int i, npid, mypid;
- Proc *p;
-
- if(msg == nil)
- msg = "";
-
- /*
- * Only one guy, ever, gets to run this.
- * If two guys do it, inevitably they end up
- * tripping over each other in the underlying
- * C library exit() implementation, which is
- * trying to run the atexit handlers and apparently
- * not thread safe. This has been observed on
- * both Linux and OpenBSD. Sigh.
- */
- {
- static Lock onelock;
- if(!canlock(&onelock))
- _exits(threadexitsmsg);
- threadexitsmsg = msg;
- }
-
- mypid = getpid();
- lock(&_threadprocslock);
- npid = 0;
- for(p=_threadprocs; p; p=p->next)
- if(p->osprocid != mypid && p->osprocid >= 1)
- pid[npid++] = p->osprocid;
- for(i=0; i<npid; i++)
- kill(pid[i], SIGUSR2);
- unlock(&_threadprocslock);
- exits(msg);
-}
-
-/*
- * per-process data, indexed by pid
- *
- * could use modify_ldt and a segment register
- * to avoid the many calls to getpid(), but i don't
- * care -- this is compatibility code. linux 2.6 with
- * nptl is a good enough pthreads to avoid this whole file.
- */
-typedef struct Perproc Perproc;
-struct Perproc
-{
- int pid;
- Proc *proc;
-};
-
-static Lock perlock;
-static Perproc perproc[1024];
-#define P ((Proc*)-1)
-
-static Perproc*
-myperproc(void)
-{
- int i, pid, h;
- Perproc *p;
-
- pid = getpid();
- h = pid%nelem(perproc);
- for(i=0; i<nelem(perproc); i++){
- p = &perproc[(i+h)%nelem(perproc)];
- if(p->pid == pid)
- return p;
- if(p->pid == 0){
- print("found 0 at %d (h=%d)\n", (i+h)%nelem(perproc), h);
- break;
- }
- }
- fprint(2, "myperproc %d (%s): cannot find self\n", pid, argv0);
- abort();
- return nil;
-}
-
-static Perproc*
-newperproc(void)
-{
- int i, pid, h;
- Perproc *p;
-
- lock(&perlock);
- pid = getpid();
- h = pid%nelem(perproc);
- for(i=0; i<nelem(perproc); i++){
- p = &perproc[(i+h)%nelem(perproc)];
- if(p->pid == pid || p->pid == -1 || p->pid == 0){
- p->pid = pid;
- unlock(&perlock);
- return p;
- }
- }
- fprint(2, "newperproc %d: out of procs\n", pid);
- abort();
- return nil;
-}
-
-Proc*
-_threadproc(void)
-{
- return myperproc()->proc;
-}
-
-void
-_threadsetproc(Proc *p)
-{
- Perproc *pp;
-
- if(p)
- p->osprocid = getpid();
- pp = newperproc();
- pp->proc = p;
- if(p == nil)
- pp->pid = -1;
-}
-
-void
-_pthreadinit(void)
-{
- signal(SIGUSR2, sigusr2handler);
-}
-
-void
-_threadpexit(void)
-{
- _exit(0);
-}
diff --git a/src/libthread/OpenBSD-386-asm.s b/src/libthread/OpenBSD-386-asm.s
deleted file mode 100644
index ed18d2f0..00000000
--- a/src/libthread/OpenBSD-386-asm.s
+++ /dev/null
@@ -1,45 +0,0 @@
-.globl getmcontext
-getmcontext:
- movl 4(%esp), %eax
-
- movl %fs, 8(%eax)
- movl %es, 12(%eax)
- movl %ds, 16(%eax)
- movl %ss, 76(%eax)
- movl %edi, 20(%eax)
- movl %esi, 24(%eax)
- movl %ebp, 28(%eax)
- movl %ebx, 36(%eax)
- movl %edx, 40(%eax)
- movl %ecx, 44(%eax)
-
- movl $1, 48(%eax) /* %eax */
- movl (%esp), %ecx /* %eip */
- movl %ecx, 60(%eax)
- leal 4(%esp), %ecx /* %esp */
- movl %ecx, 72(%eax)
-
- movl 44(%eax), %ecx /* restore %ecx */
- movl $0, %eax
- ret
-
-.globl setmcontext
-setmcontext:
- movl 4(%esp), %eax
-
- movl 8(%eax), %fs
- movl 12(%eax), %es
- movl 16(%eax), %ds
- movl 76(%eax), %ss
- movl 20(%eax), %edi
- movl 24(%eax), %esi
- movl 28(%eax), %ebp
- movl 36(%eax), %ebx
- movl 40(%eax), %edx
- movl 44(%eax), %ecx
-
- movl 72(%eax), %esp
- pushl 60(%eax) /* new %eip */
- movl 48(%eax), %eax
- ret
-
diff --git a/src/libthread/OpenBSD-power-asm.S b/src/libthread/OpenBSD-power-asm.S
deleted file mode 100644
index 36035eb5..00000000
--- a/src/libthread/OpenBSD-power-asm.S
+++ /dev/null
@@ -1,73 +0,0 @@
-ENTRY(_getmcontext) /* xxx: instruction scheduling */
- mflr %r0
- mfcr %r5
- mfctr %r6
- mfxer %r7
- stw %r0, 0*4(%r3)
- stw %r5, 1*4(%r3)
- stw %r6, 2*4(%r3)
- stw %r7, 3*4(%r3)
-
- stw %r1, 4*4(%r3)
- stw %r2, 5*4(%r3)
- li %r5, 1 /* return value for setmcontext */
- stw %r5, 6*4(%r3)
-
- stw %r13, (0+7)*4(%r3) /* callee-save GPRs */
- stw %r14, (1+7)*4(%r3) /* xxx: block move */
- stw %r15, (2+7)*4(%r3)
- stw %r16, (3+7)*4(%r3)
- stw %r17, (4+7)*4(%r3)
- stw %r18, (5+7)*4(%r3)
- stw %r19, (6+7)*4(%r3)
- stw %r20, (7+7)*4(%r3)
- stw %r21, (8+7)*4(%r3)
- stw %r22, (9+7)*4(%r3)
- stw %r23, (10+7)*4(%r3)
- stw %r24, (11+7)*4(%r3)
- stw %r25, (12+7)*4(%r3)
- stw %r26, (13+7)*4(%r3)
- stw %r27, (14+7)*4(%r3)
- stw %r28, (15+7)*4(%r3)
- stw %r29, (16+7)*4(%r3)
- stw %r30, (17+7)*4(%r3)
- stw %r31, (18+7)*4(%r3)
-
- li %r3, 0 /* return */
- blr
-
-ENTRY(_setmcontext)
- lwz %r13, (0+7)*4(%r3) /* callee-save GPRs */
- lwz %r14, (1+7)*4(%r3) /* xxx: block move */
- lwz %r15, (2+7)*4(%r3)
- lwz %r16, (3+7)*4(%r3)
- lwz %r17, (4+7)*4(%r3)
- lwz %r18, (5+7)*4(%r3)
- lwz %r19, (6+7)*4(%r3)
- lwz %r20, (7+7)*4(%r3)
- lwz %r21, (8+7)*4(%r3)
- lwz %r22, (9+7)*4(%r3)
- lwz %r23, (10+7)*4(%r3)
- lwz %r24, (11+7)*4(%r3)
- lwz %r25, (12+7)*4(%r3)
- lwz %r26, (13+7)*4(%r3)
- lwz %r27, (14+7)*4(%r3)
- lwz %r28, (15+7)*4(%r3)
- lwz %r29, (16+7)*4(%r3)
- lwz %r30, (17+7)*4(%r3)
- lwz %r31, (18+7)*4(%r3)
-
- lwz %r1, 4*4(%r3)
- lwz %r2, 5*4(%r3)
-
- lwz %r0, 0*4(%r3)
- mtlr %r0
- lwz %r0, 1*4(%r3)
- mtcr %r0 /* mtcrf 0xFF, %r0 */
- lwz %r0, 2*4(%r3)
- mtctr %r0
- lwz %r0, 3*4(%r3)
- mtxer %r0
-
- lwz %r3, 6*4(%r3)
- blr
diff --git a/src/libthread/OpenBSD-x86_64-asm.S b/src/libthread/OpenBSD-x86_64-asm.S
deleted file mode 100644
index e982cdef..00000000
--- a/src/libthread/OpenBSD-x86_64-asm.S
+++ /dev/null
@@ -1,44 +0,0 @@
-.text
-.align 8
-
-.globl libthread_getmcontext
-libthread_getmcontext:
- movq $1, 0*8(%rdi) // rax
- movq %rbx, 1*8(%rdi)
- movq %rcx, 2*8(%rdi)
- movq %rdx, 3*8(%rdi)
- movq %rsi, 4*8(%rdi)
- movq %rdi, 5*8(%rdi)
- movq %rbp, 6*8(%rdi)
- movq %rsp, 7*8(%rdi)
- movq %r8, 8*8(%rdi)
- movq %r9, 9*8(%rdi)
- movq %r10, 10*8(%rdi)
- movq %r11, 11*8(%rdi)
- movq %r12, 12*8(%rdi)
- movq %r13, 13*8(%rdi)
- movq %r14, 14*8(%rdi)
- movq %r15, 15*8(%rdi)
- movq $0, %rax
- ret
-
-.globl libthread_setmcontext
-libthread_setmcontext:
- movq 0*8(%rdi), %rax
- movq 1*8(%rdi), %rbx
- movq 2*8(%rdi), %rcx
- movq 3*8(%rdi), %rdx
- movq 4*8(%rdi), %rsi
- // %rdi later
- movq 6*8(%rdi), %rbp
- movq 7*8(%rdi), %rsp
- movq 8*8(%rdi), %r8
- movq 9*8(%rdi), %r9
- movq 10*8(%rdi), %r10
- movq 11*8(%rdi), %r11
- movq 12*8(%rdi), %r12
- movq 13*8(%rdi), %r13
- movq 14*8(%rdi), %r14
- movq 15*8(%rdi), %r15
- movq 5*8(%rdi), %rdi
- ret
diff --git a/src/libthread/arm-ucontext.c b/src/libthread/arm-ucontext.c
deleted file mode 100644
index 512ca973..00000000
--- a/src/libthread/arm-ucontext.c
+++ /dev/null
@@ -1,24 +0,0 @@
-#include "threadimpl.h"
-
-void
-makecontext(ucontext_t *uc, void (*fn)(void), int argc, ...)
-{
- int i, *sp;
- va_list arg;
-
- sp = USPALIGN(uc, 4);
- va_start(arg, argc);
- for(i=0; i<4 && i<argc; i++)
- (&uc->uc_mcontext.arm_r0)[i] = va_arg(arg, uint);
- va_end(arg);
- uc->uc_mcontext.arm_sp = (uint)sp;
- uc->uc_mcontext.arm_lr = (uint)fn;
-}
-
-int
-swapcontext(ucontext_t *oucp, const ucontext_t *ucp)
-{
- if(getcontext(oucp) == 0)
- setcontext(ucp);
- return 0;
-}
diff --git a/src/libthread/bg.c b/src/libthread/bg.c
new file mode 100644
index 00000000..2edbc0e4
--- /dev/null
+++ b/src/libthread/bg.c
@@ -0,0 +1,7 @@
+#include "threadimpl.h"
+
+int
+threadmaybackground(void)
+{
+ return 0;
+}
diff --git a/src/libthread/daemonize.c b/src/libthread/daemonize.c
index 387d1527..29929068 100644
--- a/src/libthread/daemonize.c
+++ b/src/libthread/daemonize.c
@@ -8,7 +8,7 @@
#undef wait
static int sigpid;
-static int threadpassfd;
+static int threadpassfd = -1;
static int gotsigchld;
static void
@@ -101,6 +101,13 @@ _threadsetupdaemonize(void)
sigpid = 1;
+ /*
+ * We've been told this program is likely to background itself.
+ * Put it in its own process group so that we don't get a SIGHUP
+ * when the parent exits.
+ */
+ setpgrp();
+
if(pipe(p) < 0)
sysfatal("passer pipe: %r");
@@ -163,9 +170,9 @@ _threadsetupdaemonize(void)
void
_threaddaemonize(void)
{
- if(threadpassfd >= 0){
- write(threadpassfd, "0", 1);
- close(threadpassfd);
- threadpassfd = -1;
- }
+ if(threadpassfd < 0)
+ sysfatal("threads in main proc exited w/o threadmaybackground");
+ write(threadpassfd, "0", 1);
+ close(threadpassfd);
+ threadpassfd = -1;
}
diff --git a/src/libthread/mkfile b/src/libthread/mkfile
index 8a77a316..40941f43 100644
--- a/src/libthread/mkfile
+++ b/src/libthread/mkfile
@@ -1,14 +1,14 @@
<$PLAN9/src/mkhdr
-SYSOFILES=`{sh ./sysofiles.sh}
LIB=libthread.a
OFILES=\
- $SYSOFILES\
+ bg.$O\
channel.$O\
daemonize.$O\
exec.$O\
ioproc.$O\
iorw.$O\
+ pthread.$O\
ref.$O\
thread.$O\
wait.$O\
diff --git a/src/libthread/power-ucontext.c b/src/libthread/power-ucontext.c
deleted file mode 100644
index 32a8e931..00000000
--- a/src/libthread/power-ucontext.c
+++ /dev/null
@@ -1,26 +0,0 @@
-#include "threadimpl.h"
-
-void
-makecontext(ucontext_t *ucp, void (*func)(void), int argc, ...)
-{
- ulong *sp, *tos;
- va_list arg;
-
- if(argc != 2)
- sysfatal("libthread: makecontext misused");
- sp = USPALIGN(ucp, 16);
- ucp->mc.pc = (long)func;
- ucp->mc.sp = (long)sp;
- va_start(arg, argc);
- ucp->mc.r3 = va_arg(arg, long);
- ucp->mc.r4 = va_arg(arg, long);
- va_end(arg);
-}
-
-int
-swapcontext(ucontext_t *oucp, ucontext_t *ucp)
-{
- if(getcontext(oucp) == 0)
- setcontext(ucp);
- return 0;
-}
diff --git a/src/libthread/power-ucontext.h b/src/libthread/power-ucontext.h
deleted file mode 100644
index 1985d98d..00000000
--- a/src/libthread/power-ucontext.h
+++ /dev/null
@@ -1,36 +0,0 @@
-#define setcontext(u) _setmcontext(&(u)->mc)
-#define getcontext(u) _getmcontext(&(u)->mc)
-typedef struct mcontext mcontext_t;
-typedef struct ucontext ucontext_t;
-struct mcontext
-{
- ulong pc; /* lr */
- ulong cr; /* mfcr */
- ulong ctr; /* mfcr */
- ulong xer; /* mfcr */
- ulong sp; /* callee saved: r1 */
- ulong toc; /* callee saved: r2 */
- ulong r3; /* first arg to function, return register: r3 */
- ulong gpr[19]; /* callee saved: r13-r31 */
-/*
-// XXX: currently do not save vector registers or floating-point state
-// ulong pad;
-// uvlong fpr[18]; / * callee saved: f14-f31 * /
-// ulong vr[4*12]; / * callee saved: v20-v31, 256-bits each * /
-*/
-};
-
-struct ucontext
-{
- struct {
- void *ss_sp;
- uint ss_size;
- } uc_stack;
- sigset_t uc_sigmask;
- mcontext_t mc;
-};
-
-void makecontext(ucontext_t*, void(*)(void), int, ...);
-int swapcontext(ucontext_t*, ucontext_t*);
-int _getmcontext(mcontext_t*);
-void _setmcontext(mcontext_t*);
diff --git a/src/libthread/sparc64-ucontext.c b/src/libthread/sparc64-ucontext.c
deleted file mode 100644
index e4800c19..00000000
--- a/src/libthread/sparc64-ucontext.c
+++ /dev/null
@@ -1,49 +0,0 @@
-/* Copyright (C) 2001 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Jakub Jelinek <jakub@redhat.com>.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-#include <ucontext.h>
-
-#define UC_M_PC 40
-#define UC_M_NPC 48
-
-extern int __getcontext (ucontext_t *ucp);
-extern int __setcontext (const ucontext_t *ucp, int restoremask);
-
-int
-swapcontext (ucontext_t *oucp, const ucontext_t *ucp)
-{
- extern void __swapcontext_ret (void);
- /* Save the current machine context to oucp. */
- __getcontext (oucp);
- /* Modify oucp to skip the __setcontext call on reactivation. */
- *(long*)((char*)oucp+UC_M_PC) = (long)__swapcontext_ret;
- *(long*)((char*)oucp+UC_M_NPC) = (long)__swapcontext_ret + 4;
- /* Restore the machine context in ucp. */
- __setcontext (ucp, 1);
- return 0;
-}
-
-asm (" \n\
- .text \n\
- .type __swapcontext_ret, #function \n\
-__swapcontext_ret: \n\
- return %i7 + 8 \n\
- clr %o0 \n\
- .size __swapcontext_ret, .-__swapcontext_ret \n\
- ");
diff --git a/src/libthread/stkmalloc.c b/src/libthread/stkmalloc.c
deleted file mode 100644
index 083aea1b..00000000
--- a/src/libthread/stkmalloc.c
+++ /dev/null
@@ -1,13 +0,0 @@
-#include "threadimpl.h"
-
-void*
-_threadstkalloc(int n)
-{
- return malloc(n);
-}
-
-void
-_threadstkfree(void *v, int n)
-{
- free(v);
-}
diff --git a/src/libthread/stkmmap.c b/src/libthread/stkmmap.c
deleted file mode 100644
index f4a24630..00000000
--- a/src/libthread/stkmmap.c
+++ /dev/null
@@ -1,25 +0,0 @@
-#include <u.h>
-#include <sys/mman.h>
-#include "threadimpl.h"
-
-#ifndef MAP_STACK
-#define MAP_STACK 0
-#endif
-
-void*
-_threadstkalloc(int n)
-{
- void *p;
-
- p = mmap(nil, n, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON|MAP_STACK, -1, 0);
- if(p == (void*)-1)
- return nil;
- return p;
-}
-
-void
-_threadstkfree(void *v, int n)
-{
- if(n > 0)
- munmap(v, n);
-}
diff --git a/src/libthread/sysofiles.sh b/src/libthread/sysofiles.sh
deleted file mode 100644
index 833afbe0..00000000
--- a/src/libthread/sysofiles.sh
+++ /dev/null
@@ -1,28 +0,0 @@
-#!/bin/sh
-
-test -f $PLAN9/config && . $PLAN9/config
-
-case "$SYSNAME" in
-NetBSD)
- echo ${SYSNAME}-${OBJTYPE}-asm.o $SYSNAME.o stkmalloc.o
- ;;
-OpenBSD)
- echo pthread.o stkmmap.o
- ;;
-*)
- echo pthread.o stkmalloc.o
-esac
-
-# Various libc don't supply swapcontext, makecontext, so we do.
-case "$SYSNAME-$OBJTYPE" in
-Linux-arm | Linux-sparc64 | NetBSD-arm | OpenBSD-386 | OpenBSD-power | OpenBSD-x86_64)
- echo $OBJTYPE-ucontext.o
- ;;
-esac
-
-# A few libc don't supply setcontext, getcontext, so we do.
-case "$SYSNAME-$OBJTYPE" in
-Linux-arm | Linux-sparc64 | OpenBSD-386 | OpenBSD-power | OpenBSD-x86_64)
- echo $SYSNAME-$OBJTYPE-asm.o
- ;;
-esac
diff --git a/src/libthread/thread.c b/src/libthread/thread.c
index 65e65194..79e0ec71 100644
--- a/src/libthread/thread.c
+++ b/src/libthread/thread.c
@@ -1,13 +1,12 @@
#include "threadimpl.h"
-int _threaddebuglevel;
+int _threaddebuglevel = 0;
static uint threadnproc;
static uint threadnsysproc;
static Lock threadnproclock;
static Ref threadidref;
static Proc *threadmainproc;
-static int pthreadperthread;
static void addproc(Proc*);
static void delproc(Proc*);
@@ -16,17 +15,18 @@ static void delthread(_Threadlist*, _Thread*);
static int onlist(_Threadlist*, _Thread*);
static void addthreadinproc(Proc*, _Thread*);
static void delthreadinproc(Proc*, _Thread*);
-static void contextswitch(Context *from, Context *to);
static void procmain(Proc*);
-static void procscheduler(Proc*);
static int threadinfo(void*, char*);
+static void pthreadscheduler(Proc *p);
+static void pthreadsleepschedlocked(Proc *p, _Thread *t);
+static void pthreadwakeupschedlocked(Proc *p, _Thread *self, _Thread *t);
+static _Thread* procnext(Proc*, _Thread*);
static void
-_threaddebug(char *fmt, ...)
+_threaddebug(_Thread *t, char *fmt, ...)
{
va_list arg;
char buf[128];
- _Thread *t;
char *p;
static int fd = -1;
@@ -52,7 +52,8 @@ _threaddebug(char *fmt, ...)
va_start(arg, fmt);
vsnprint(buf, sizeof buf, fmt, arg);
va_end(arg);
- t = proc()->thread;
+ if(t == nil)
+ t = proc()->thread;
if(t)
fprint(fd, "%p %d.%d: %s\n", proc(), getpid(), t->id, buf);
else
@@ -82,109 +83,24 @@ procalloc(void)
return p;
}
-static void
-threadstart(uint y, uint x)
-{
- _Thread *t;
- ulong z;
-
-//print("threadstart\n");
- z = (ulong)x << 16; /* hide undefined 32-bit shift from 32-bit compilers */
- z <<= 16;
- z |= y;
- t = (_Thread*)z;
-
-//print("threadstart sp=%p arg=%p startfn=%p t=%p\n", &t, t, t->startfn, t->startarg);
- t->startfn(t->startarg);
-/*print("threadexits %p\n", v); */
- threadexits(nil);
-/*print("not reacehd\n"); */
-}
-
-static _Thread*
-threadalloc(void (*fn)(void*), void *arg, uint stack)
+_Thread*
+_threadcreate(Proc *p, void (*fn)(void*), void *arg, uint stack)
{
_Thread *t;
- sigset_t zero;
- uint x, y;
- ulong z;
- /* allocate the task and stack together */
+ USED(stack);
t = malloc(sizeof *t);
if(t == nil)
- sysfatal("threadalloc malloc: %r");
+ sysfatal("threadcreate malloc: %r");
memset(t, 0, sizeof *t);
t->id = incref(&threadidref);
-//print("fn=%p arg=%p\n", fn, arg);
t->startfn = fn;
t->startarg = arg;
-//print("makecontext sp=%p t=%p startfn=%p\n", (char*)t->stk+t->stksize, t, t->startfn);
-
- /* do a reasonable initialization */
- if(stack == 0)
- return t;
- t->stk = _threadstkalloc(stack);
- if(t->stk == nil)
- sysfatal("threadalloc malloc stack: %r");
- t->stksize = stack;
- memset(&t->context.uc, 0, sizeof t->context.uc);
- sigemptyset(&zero);
- sigprocmask(SIG_BLOCK, &zero, &t->context.uc.uc_sigmask);
-//print("makecontext sp=%p t=%p startfn=%p\n", (char*)t->stk+t->stksize, t, t->startfn);
-
- /* must initialize with current context */
- if(getcontext(&t->context.uc) < 0)
- sysfatal("threadalloc getcontext: %r");
-//print("makecontext sp=%p t=%p startfn=%p\n", (char*)t->stk+t->stksize, t, t->startfn);
-
- /*
- * Call makecontext to do the real work.
- * To avoid various mistakes on other system software,
- * debuggers, and so on, don't get too close to both
- * ends of the stack. Just staying away is much easier
- * than debugging everything (outside our control)
- * that has off-by-one errors.
- */
- t->context.uc.uc_stack.ss_sp = (void*)(t->stk+64);
- t->context.uc.uc_stack.ss_size = t->stksize-2*64;
-#if defined(__sun__) && !defined(__MAKECONTEXT_V2_SOURCE) /* sigh */
- /* can avoid this with __MAKECONTEXT_V2_SOURCE but only on SunOS 5.9 */
- t->context.uc.uc_stack.ss_sp =
- (char*)t->context.uc.uc_stack.ss_sp
- +t->context.uc.uc_stack.ss_size;
-#endif
- /*
- * All this magic is because you have to pass makecontext a
- * function that takes some number of word-sized variables,
- * and on 64-bit machines pointers are bigger than words.
- */
-//print("makecontext sp=%p t=%p startfn=%p\n", (char*)t->stk+t->stksize, t, t->startfn);
- z = (ulong)t;
- y = z;
- z >>= 16; /* hide undefined 32-bit shift from 32-bit compilers */
- x = z>>16;
- makecontext(&t->context.uc, (void(*)(void))threadstart, 2, y, x);
-
- return t;
-}
-
-_Thread*
-_threadcreate(Proc *p, void (*fn)(void*), void *arg, uint stack)
-{
- _Thread *t;
-
- /* defend against bad C libraries */
- if(stack < (256<<10))
- stack = 256<<10;
-
- if(p->nthread == 0 || pthreadperthread)
- stack = 0; // not using it
- t = threadalloc(fn, arg, stack);
t->proc = p;
- if(p->nthread == 0)
- p->thread0 = t;
- else if(pthreadperthread)
+ if(p->nthread != 0)
_threadpthreadstart(p, t);
+ else
+ t->mainthread = 1;
p->nthread++;
addthreadinproc(p, t);
_threadready(t);
@@ -197,6 +113,7 @@ threadcreate(void (*fn)(void*), void *arg, uint stack)
_Thread *t;
t = _threadcreate(proc(), fn, arg, stack);
+ _threaddebug(nil, "threadcreate %d", t->id);
return t->id;
}
@@ -210,41 +127,11 @@ proccreate(void (*fn)(void*), void *arg, uint stack)
p = procalloc();
t = _threadcreate(p, fn, arg, stack);
id = t->id; /* t might be freed after _procstart */
+ _threaddebug(t, "proccreate %p", p);
_procstart(p, procmain);
return id;
}
-// For pthreadperthread mode, procswitch flips
-// between the threads.
-static void
-procswitch(Proc *p, _Thread *from, _Thread *to)
-{
- _threaddebug("procswitch %p %d %d", p, from?from->id:-1, to?to->id:-1);
- lock(&p->schedlock);
- from->schedrend.l = &p->schedlock;
- if(to) {
- p->schedthread = to;
- to->schedrend.l = &p->schedlock;
- _threaddebug("procswitch wakeup %p %d", p, to->id);
- _procwakeup(&to->schedrend);
- }
- if(p->schedthread != from) {
- if(from->exiting) {
- unlock(&p->schedlock);
- _threadpexit();
- _threaddebug("procswitch exit wakeup!!!\n");
- }
- while(p->schedthread != from) {
- _threaddebug("procswitch sleep %p %d", p, from->id);
- _procsleep(&from->schedrend);
- _threaddebug("procswitch awake %p %d", p, from->id);
- }
- if(p->schedthread != from)
- sysfatal("_procswitch %p %p oops", p->schedthread, from);
- }
- unlock(&p->schedlock);
-}
-
void
_threadswitch(void)
{
@@ -252,15 +139,8 @@ _threadswitch(void)
needstack(0);
p = proc();
-
/*print("threadswtch %p\n", p); */
-
- if(p->thread == p->thread0)
- procscheduler(p);
- else if(pthreadperthread)
- procswitch(p, p->thread, p->thread0);
- else
- contextswitch(&p->thread->context, &p->schedcontext);
+ pthreadscheduler(p);
}
void
@@ -359,15 +239,6 @@ threadsysfatal(char *fmt, va_list arg)
}
static void
-contextswitch(Context *from, Context *to)
-{
- if(swapcontext(&from->uc, &to->uc) < 0){
- fprint(2, "swapcontext failed: %r\n");
- assert(0);
- }
-}
-
-static void
procmain(Proc *p)
{
_Thread *t;
@@ -377,7 +248,6 @@ procmain(Proc *p)
/* take out first thread to run on system stack */
t = p->runqueue.head;
delthread(&p->runqueue, t);
- memset(&t->context.uc, 0, sizeof t->context.uc);
/* run it */
p->thread = t;
@@ -390,118 +260,133 @@ void
_threadpthreadmain(Proc *p, _Thread *t)
{
_threadsetproc(p);
- procswitch(p, t, nil);
+ lock(&p->lock);
+ pthreadsleepschedlocked(p, t);
+ unlock(&p->lock);
+ _threaddebug(nil, "startfn");
t->startfn(t->startarg);
threadexits(nil);
}
static void
-procscheduler(Proc *p)
+pthreadsleepschedlocked(Proc *p, _Thread *t)
{
- _Thread *t;
+ _threaddebug(t, "pthreadsleepsched %p %d", p, t->id);;
+ t->schedrend.l = &p->lock;
+ while(p->schedthread != t)
+ _procsleep(&t->schedrend);
+}
+
+static void
+pthreadwakeupschedlocked(Proc *p, _Thread *self, _Thread *t)
+{
+ _threaddebug(self, "pthreadwakeupschedlocked %p %d", p, t->id);;
+ t->schedrend.l = &p->lock;
+ p->schedthread = t;
+ _procwakeup(&t->schedrend);
+}
+
+static void
+pthreadscheduler(Proc *p)
+{
+ _Thread *self, *t;
- _threaddebug("scheduler enter");
-//print("s %p\n", p);
-Top:
+ _threaddebug(nil, "scheduler");
lock(&p->lock);
- t = p->thread;
+ self = p->thread;
p->thread = nil;
- if(t->exiting){
- delthreadinproc(p, t);
+ _threaddebug(self, "pausing");
+
+ if(self->exiting) {
+ _threaddebug(self, "exiting");
+ delthreadinproc(p, self);
p->nthread--;
-/*print("nthread %d\n", p->nthread); */
- _threadstkfree(t->stk, t->stksize);
- /*
- * Cannot free p->thread0 yet: it is used for the
- * context switches back to the scheduler.
- * Instead, we will free it at the end of this function.
- * But all the other threads can be freed now.
- */
- if(t != p->thread0)
- free(t);
}
- for(;;){
- if((t = p->pinthread) != nil){
- while(!onlist(&p->runqueue, t)){
- p->runrend.l = &p->lock;
- _threaddebug("scheduler sleep (pin)");
- _procsleep(&p->runrend);
- _threaddebug("scheduler wake (pin)");
- }
- }else
- while((t = p->runqueue.head) == nil){
- if(p->nthread == 0)
- goto Out;
- if((t = p->idlequeue.head) != nil){
- /*
- * Run all the idling threads once.
- */
- while((t = p->idlequeue.head) != nil){
- delthread(&p->idlequeue, t);
- addthread(&p->runqueue, t);
- }
- continue;
- }
- p->runrend.l = &p->lock;
- _threaddebug("scheduler sleep");
- _procsleep(&p->runrend);
- _threaddebug("scheduler wake");
- }
- if(p->pinthread && p->pinthread != t)
- fprint(2, "p->pinthread %p t %p\n", p->pinthread, t);
- assert(p->pinthread == nil || p->pinthread == t);
- delthread(&p->runqueue, t);
- unlock(&p->lock);
- p->thread = t;
- p->nswitch++;
- _threaddebug("run %d (%s)", t->id, t->name);
-//print("run %p %p %p %p\n", t, *(uintptr*)(t->context.uc.mc.sp), t->context.uc.mc.di, t->context.uc.mc.si);
- if(t == p->thread0)
+ t = procnext(p, self);
+ if(t != nil) {
+ pthreadwakeupschedlocked(p, self, t);
+ if(!self->exiting) {
+ pthreadsleepschedlocked(p, self);
+ _threaddebug(nil, "resume %d", self->id);
+ unlock(&p->lock);
return;
- if(pthreadperthread)
- procswitch(p, p->thread0, t);
- else
- contextswitch(&p->schedcontext, &t->context);
- _threaddebug("back in scheduler");
-/*print("back in scheduler\n"); */
- goto Top;
+ }
}
-Out:
- _threaddebug("scheduler exit");
- if(p->mainproc){
- /*
- * Stupid bug - on Linux 2.6 and maybe elsewhere,
- * if the main thread exits then the others keep running
- * but the process shows up as a zombie in ps and is not
- * attachable with ptrace. We'll just sit around pretending
- * to be a system proc instead of exiting.
- */
- _threaddaemonize();
+ if(t == nil) {
+ /* Tear down proc bookkeeping. Wait to free p. */
+ delproc(p);
lock(&threadnproclock);
- if(++threadnsysproc == threadnproc)
+ if(p->sysproc)
+ --threadnsysproc;
+ if(--threadnproc == threadnsysproc)
threadexitsall(p->msg);
- p->sysproc = 1;
unlock(&threadnproclock);
- for(;;)
- sleep(1000);
}
- delproc(p);
- lock(&threadnproclock);
- if(p->sysproc)
- --threadnsysproc;
- if(--threadnproc == threadnsysproc)
- threadexitsall(p->msg);
- unlock(&threadnproclock);
- unlock(&p->lock);
+ /* Tear down pthread. */
+ if(self->mainthread && p->mainproc) {
+ _threaddaemonize();
+ _threaddebug(self, "sleeper");
+ unlock(&p->lock);
+ /*
+ * Avoid bugs with main pthread exiting.
+ * When all procs are gone, threadexitsall above will happen.
+ */
+ for(;;)
+ sleep(60*60*1000);
+ }
_threadsetproc(nil);
- free(p->thread0);
- free(p);
+ free(self);
+ unlock(&p->lock);
+ if(t == nil)
+ free(p);
_threadpexit();
}
+static _Thread*
+procnext(Proc *p, _Thread *self)
+{
+ _Thread *t;
+
+ if((t = p->pinthread) != nil){
+ while(!onlist(&p->runqueue, t)){
+ p->runrend.l = &p->lock;
+ _threaddebug(self, "scheduler sleep (pin)");
+ _procsleep(&p->runrend);
+ _threaddebug(self, "scheduler wake (pin)");
+ }
+ } else
+ while((t = p->runqueue.head) == nil){
+ if(p->nthread == 0)
+ return nil;
+ if((t = p->idlequeue.head) != nil){
+ /*
+ * Run all the idling threads once.
+ */
+ while((t = p->idlequeue.head) != nil){
+ delthread(&p->idlequeue, t);
+ addthread(&p->runqueue, t);
+ }
+ continue;
+ }
+ p->runrend.l = &p->lock;
+ _threaddebug(self, "scheduler sleep");
+ _procsleep(&p->runrend);
+ _threaddebug(self, "scheduler wake");
+ }
+
+ if(p->pinthread && p->pinthread != t)
+ fprint(2, "p->pinthread %p t %p\n", p->pinthread, t);
+ assert(p->pinthread == nil || p->pinthread == t);
+ delthread(&p->runqueue, t);
+
+ p->thread = t;
+ p->nswitch++;
+ return t;
+}
+
void
_threadsetsysproc(void)
{
@@ -784,14 +669,18 @@ threadrwakeup(Rendez *r, int all, ulong pc)
int i;
_Thread *t;
+ _threaddebug(nil, "rwakeup %p %d", r, all);
for(i=0;; i++){
if(i==1 && !all)
break;
if((t = r->waiting.head) == nil)
break;
+ _threaddebug(nil, "rwakeup %p %d -> wake %d", r, all, t->id);
delthread(&r->waiting, t);
_threadready(t);
+ _threaddebug(nil, "rwakeup %p %d -> loop", r, all);
}
+ _threaddebug(nil, "rwakeup %p %d -> total %d", r, all, i);
return i;
}
@@ -827,6 +716,7 @@ int
main(int argc, char **argv)
{
Proc *p;
+ _Thread *t;
char *opts;
argv0 = argv[0];
@@ -835,16 +725,7 @@ main(int argc, char **argv)
if(opts == nil)
opts = "";
- pthreadperthread = (strstr(opts, "pthreadperthread") != nil);
-#ifdef PLAN9PORT_ASAN
- // ASAN can't deal with the coroutine stack switches.
- // In theory it has support for informing it about stack switches,
- // but even with those calls added it can't deal with things
- // like fork or exit from a coroutine stack.
- // Easier to just run in pthread-per-thread mode.
- pthreadperthread = 1;
-#endif
- if(strstr(opts, "nodaemon") == nil && getenv("NOLIBTHREADDAEMONIZE") == nil)
+ if(threadmaybackground() && strstr(opts, "nodaemon") == nil && getenv("NOLIBTHREADDAEMONIZE") == nil)
_threadsetupdaemonize();
threadargc = argc;
@@ -875,9 +756,10 @@ main(int argc, char **argv)
if(mainstacksize == 0)
mainstacksize = 256*1024;
atnotify(threadinfo, 1);
- _threadcreate(p, threadmainstart, nil, mainstacksize);
+ t = _threadcreate(p, threadmainstart, nil, mainstacksize);
+ t->mainthread = 1;
procmain(p);
- sysfatal("procscheduler returned in threadmain!");
+ sysfatal("procmain returned in libthread");
/* does not return */
return 0;
}
diff --git a/src/libthread/threadimpl.h b/src/libthread/threadimpl.h
index 8d22a161..fd40f252 100644
--- a/src/libthread/threadimpl.h
+++ b/src/libthread/threadimpl.h
@@ -9,36 +9,11 @@
# if defined(__APPLE__)
# define _XOPEN_SOURCE /* for Snow Leopard */
# endif
-# include <ucontext.h>
#endif
#include <sys/utsname.h>
#include "libc.h"
#include "thread.h"
-#if defined(__OpenBSD__)
-# define mcontext libthread_mcontext
-# define mcontext_t libthread_mcontext_t
-# define ucontext libthread_ucontext
-# define ucontext_t libthread_ucontext_t
-# if defined __i386__
-# include "386-ucontext.h"
-# elif defined __amd64__
-# include "x86_64-ucontext.h"
-# else
-# include "power-ucontext.h"
-# endif
-extern pid_t rfork_thread(int, void*, int(*)(void*), void*);
-#endif
-
-#if defined(__arm__)
-int mygetmcontext(ulong*);
-void mysetmcontext(const ulong*);
-#define setcontext(u) mysetmcontext(&(u)->uc_mcontext.arm_r0)
-#define getcontext(u) mygetmcontext(&(u)->uc_mcontext.arm_r0)
-#endif
-
-
-typedef struct Context Context;
typedef struct Execjob Execjob;
typedef struct Proc Proc;
typedef struct _Procrendez _Procrendez;
@@ -54,11 +29,6 @@ enum
STACK = 8192
};
-struct Context
-{
- ucontext_t uc;
-};
-
struct Execjob
{
int *fd;
@@ -72,11 +42,7 @@ struct _Procrendez
{
Lock *l;
int asleep;
-#ifdef PLAN9PORT_USING_PTHREADS
pthread_cond_t cond;
-#else
- int pid;
-#endif
};
struct _Thread
@@ -85,18 +51,14 @@ struct _Thread
_Thread *prev;
_Thread *allnext;
_Thread *allprev;
- Context context;
void (*startfn)(void*);
void *startarg;
uint id;
-#ifdef PLAN9PORT_USING_PTHREADS
pthread_t osprocid;
-#else
- int osprocid;
-#endif
uchar *stk;
uint stksize;
int exiting;
+ int mainthread;
Proc *proc;
char name[256];
char state[256];
@@ -114,11 +76,7 @@ struct Proc
Proc *next;
Proc *prev;
char msg[128];
-#ifdef PLAN9PORT_USING_PTHREADS
pthread_t osprocid;
-#else
- int osprocid;
-#endif
Lock lock;
int nswitch;
_Thread *thread0;
@@ -130,9 +88,7 @@ struct Proc
uint nthread;
uint sysproc;
_Procrendez runrend;
- Lock schedlock;
_Thread *schedthread;
- Context schedcontext;
void *udata;
Jmp sigjmp;
int mainproc;
diff --git a/src/libthread/x86_64-ucontext.c b/src/libthread/x86_64-ucontext.c
deleted file mode 100644
index 5d1aaefc..00000000
--- a/src/libthread/x86_64-ucontext.c
+++ /dev/null
@@ -1,28 +0,0 @@
-#include "threadimpl.h"
-
-void
-makecontext(ucontext_t *uc, void (*fn)(void), int argc, ...)
-{
- uintptr *sp;
- va_list arg;
-
- if(argc != 2)
- sysfatal("libthread: makecontext misused");
- va_start(arg, argc);
- uc->mc.di = va_arg(arg, uint);
- uc->mc.si = va_arg(arg, uint);
- va_end(arg);
-
- sp = USPALIGN(uc, 16);
- *--sp = 0; // fn's return address
- *--sp = (uintptr)fn; // return address of setcontext
- uc->mc.sp = (uintptr)sp;
-}
-
-int
-swapcontext(ucontext_t *oucp, ucontext_t *ucp)
-{
- if(getcontext(oucp) == 0)
- setcontext(ucp);
- return 0;
-}
diff --git a/src/libthread/x86_64-ucontext.h b/src/libthread/x86_64-ucontext.h
deleted file mode 100644
index e0640761..00000000
--- a/src/libthread/x86_64-ucontext.h
+++ /dev/null
@@ -1,42 +0,0 @@
-#define setcontext(u) libthread_setmcontext(&(u)->mc)
-#define getcontext(u) libthread_getmcontext(&(u)->mc)
-typedef struct mcontext mcontext_t;
-typedef struct ucontext ucontext_t;
-
-struct mcontext
-{
- uintptr ax;
- uintptr bx;
- uintptr cx;
- uintptr dx;
- uintptr si;
- uintptr di;
- uintptr bp;
- uintptr sp;
- uintptr r8;
- uintptr r9;
- uintptr r10;
- uintptr r11;
- uintptr r12;
- uintptr r13;
- uintptr r14;
- uintptr r15;
-/*
-// XXX: currently do not save vector registers or floating-point state
-*/
-};
-
-struct ucontext
-{
- struct {
- void *ss_sp;
- uint ss_size;
- } uc_stack;
- sigset_t uc_sigmask;
- mcontext_t mc;
-};
-
-void makecontext(ucontext_t*, void(*)(void), int, ...);
-int swapcontext(ucontext_t*, ucontext_t*);
-int libthread_getmcontext(mcontext_t*);
-void libthread_setmcontext(mcontext_t*);