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2002-08-02 Ulrich Drepper <drepper@redhat.com> * configure.in (HAVE_BROKEN_ALIAS_ATTRIBUTE): Add check for broken alias attribute handling. * config.h.in (HAVE_BROKEN_ALIAS_ATTRIBUTE): Add. * assert/assert.c (__assert_fail): Fix typo in comment. * include/rpc/rpc.h: Declare __libc_tsd_RPC_VARS if USE_TLS && HAVE___THREAD. * sunrpc/rpc_thread.c: Don't define __libc_tsd_RPC_VARS as static if USE_TLS && HAVE___THREAD. * sunrpc/Versions [libc] (GLIBC_PRIVATE): Export __libc_tsd_RPC_VARS. 2002-08-02 Jakub Jelinek <jakub@redhat.com> * assert/assert.c (__assert_fail): Remove undef. Replace INTDEF with libc_hidden_def. * assert/__assert.c (__assert): Remove INTUSE. * elf/dl-minimal.c (__assert_fail): Replace INTDEF with libc_hidden_weak. * include/libc-symbols.h (hidden_proto, hidden_def, hidden_weak, hidden_ver, libc_hidden_proto, libc_hidden_def, libc_hidden_weak, libc_hidden_ver, rtld_hidden_proto, rtld_hidden_def, rtld_hidden_weak, rltd_hidden_ver, libm_hidden_proto, libm_hidden_def, libm_hidden_weak, libm_hiden_ver): Define. * include/assert.h (__assert_fail_internal): Remove. (__assert_fail): Add prototype. Add hidden_proto. * include/libc-internal.h (__libc_freeres, __profile_frequency): Add libc_hidden_proto. * include/wchar.h (__mbrtowc_internal, __mbrlen_internal): Remove. (__mbrtowc, __mbrlen): Use libc_hidden_proto. Remove macros. * include/string.h (__mempcpy, __stpncpy, __rawmemchr, __strcasecmp): Add libc_hidden_proto. * include/fcntl.h (__open64, __libc_open, __libc_fcntl, __open, __fcntl): Add libc_hidden_proto. Remove macros. (__open_internal, __fcntl_internal): Remove. * libio/iofdopen.c (_IO_fcntl): Remove INTUSE from __fcntl. * malloc/set-freeres.c (__libc_freeres): Add libc_hidden_def. * nss/nsswitch.h (__nss_database_lookup, __nss_next): Add libc_hiden_proto. * nss/nsswitch.c (__nss_database_lookup, __nss_next): Add libc_hidden_def. * sysdeps/generic/mempcpy.c (__mempcpy): Remove undef. Add libc_hidden_def. * sysdeps/generic/open64.c (__open64): Add libc_hidden_def. * sysdeps/generic/open.c (__open): Remove undef. Add libc_hidden_def. Remove INTDEF. * sysdeps/generic/fcntl.c (__fcntl): Remove undef. Add libc_hidden_def. * sysdeps/mach/hurd/fcntl.c (__fcntl): Likewise. * sysdeps/i386/i586/mempcpy.S (__mempcpy): Add libc_hidden_def. * sysdeps/i386/i686/mempcpy.S (__mempcpy): Likewise. * sysdeps/mach/hurd/fcntl.c (__libc_fcntl, __fcntl): Remove undef. (__fcntl): Remove INTDEF2. Add libc_hidden_weak. (__libc_fcntl): Add libc_hidden_def. * sysdeps/mach/hurd/open.c (__libc_open, __open): Remove undef. (__open): Remove INTDEF2. Add libc_hidden_weak. (__libc_open): Add libc_hidden_def. * sysdeps/posix/open64.c (__open64): Add libc_hidden_weak. * sysdeps/standalone/open.c (__open): Add libc_hidden_def. * sysdeps/unix/sysv/aix/fcntl.c (__libc_fcntl, __fcntl): Remove undef. Add libc_hidden_def. * sysdeps/unix/sysv/aix/open.c (__libc_open, __open): Remove undef. Add libc_hidden_def. * sysdeps/unix/sysv/linux/i386/fcntl.c (__libc_fcntl, __fcntl): Remove undef. (__fcntl): Remove INTDEF2. Add libc_hidden_weak. (__libc_fcntl): Add libc_hidden_def. * sysdeps/unix/sysv/linux/syscalls.list (__fcntl_internal, __getpgid_internal, __chown_internal): Remove. (__GI___fcntl, __GI___libc_fcntl, __GI___getpgid, __GI___pipe, __GI___sched_setscheduler, __GI___select, __GI___setpgid, __GI___chown): Add. * sysdeps/unix/syscalls.list (__close_internal, __dup2_internal, __getpid_internal, __open_internal, __write_internal): Remove. (__GI___fcntl, __GI___libc_fcntl, __GI___open, __GI___libc_open, __GI___chown, __GI___close, __GI___dup2, __GI___getpid, __GI___libc_open, __GI___open, __GI___read, __GI___libc_read, __GI___select, __GI___statfs, __GI___write, __GI___libc_write): Add. * wcsmbs/mbrlen.c (__mbrlen): Remove undef. Replace INTDEF with libc_hidden_def. * wcsmbs/mbrtowc.c (__mbrtowc): Likewise. * catgets/catgetsinfo.h (__open_catalog): Add libc_hidden_proto. * catgets/open_catalog.c (__open_catalog): Add libc_hidden_def. * elf/dl-profile.c (__profile_frequency): Add libc_hidden_proto. * include/rpc/rpc.h (__rpc_thread_svc_fdset, __rpc_thread_createerr): Add libc_hidden_proto. * include/sys/poll.h (__poll): Add libc_hidden_proto. * include/sys/select.h (__select): Likewise. * include/sys/socket.h (__send): Likewise. * include/sys/statfs.h (__statfs): Likewise. * include/unistd.h (__pwrite64, __libc_read, __pipe, __chown, __dup2, __getpid, __getpgid, __setpgid, __close, __read, __write, __getpagesize, __sbrk): Likewise. (__chown_internal, __dup2_internal, __getpid_internal, __getpgid_internal, __close_internal, __write_internal, __getpagesize_internal): Remove. (__close, __dup2, __getpagesize, __getpgid, __getpid, __libc_write): Remove macros. * include/printf.h (__printf_fp): Add libc_hidden_proto. * include/sched.h (__sched_setscheduler): Likewise. * include/resolv.h (__res_ninit, __res_randomid): Likewise. * include/stdlib.h (__secure_getenv): Likewise. * include/signal.h (__sigaction, __sigsuspend): Likewise. * inet/getaliasent_r.c (NSS_attribute_hidden): Remove. * inet/getaliasname_r.c (NSS_attribute_hidden): Remove. * inet/getnetbyad_r.c (NSS_attribute_hidden): Remove. * inet/getnetbynm_r.c (NSS_attribute_hidden): Remove. * inet/getnetent_r.c (NSS_attribute_hidden): Remove. * inet/getproto_r.c (NSS_attribute_hidden): Remove. * inet/getprtent_r.c (NSS_attribute_hidden): Remove. * inet/getprtname_r.c (NSS_attribute_hidden): Remove. * inet/getrpcbyname_r.c (NSS_attribute_hidden): Remove. * inet/getrpcbynumber_r.c (NSS_attribute_hidden): Remove. * inet/getrpcent_r.c (NSS_attribute_hidden): Remove. * inet/getservent_r.c (NSS_attribute_hidden): Remove. * inet/getsrvbynm_r.c (NSS_attribute_hidden): Remove. * inet/getsrvbypt_r.c (NSS_attribute_hidden): Remove. * inet/gethstbyad_r.c (DB_LOOKUP_FCT): Remove INTUSE. * inet/gethstbynm2_r.c (DB_LOOKUP_FCT): Likewise. * inet/gethstbynm_r.c (DB_LOOKUP_FCT): Likewise. * inet/gethstent_r.c (DB_LOOKUP_FCT): Likewise. * libio/genops.c (__overflow): Add libc_hidden_def. * libio/iovdprintf.c: Remove libio.h include. * libio/libioP.h (libc_hidden_proto, libc_hidden_def, libc_hidden_weak): Define to nothing if not defined. (__overflow, __woverflow): Add libc_hidden_proto. * libio/wgenops.c (__woverflow): Add libc_hidden_def. * nss/getXXent_r.c (NSS_attribute_hidden): Remove. (DB_LOOKUP_FCT): Add libc_hidden_proto. * nss/getXXbyYY_r.c (NSS_attribute_hidden): Remove. (DB_LOOKUP_FCT): Add libc_hidden_proto. * nss/XXX-lookup.c (DB_LOOKUP_FCT): Add libc_hidden_proto and libc_hidden_def. * nss/hosts-lookup.c (__nss_hosts_lookup): Remove INTDEF. * posix/bsd-getpgrp.c (__getpgid_internal): Remove. (__getpgid): Add libc_hidden_proto. (__bsd_getpgrp): Remove INTUSE. * resolv/res_init.c (__res_ninit, __res_randomid): Add libc_hidden_def. * shadow/getspent_r.c (NSS_attribute_hidden): Remove. * shadow/getspnam_r.c (NSS_attribute_hidden): Remove. * stdio-common/printf_fp.c (__printf_fp): Add libc_hidden_def. * stdlib/strfmon.c (__printf_fp): Add libc_hidden_proto. * stdlib/secure-getenv.c (__secure_getenv): Add libc_hidden_def. * sunrpc/rpc_thread.c (__rpc_thread_svc_fdset, __rpc_thread_createerr): Add libc_hidden_def. * sysdeps/alpha/alphaev67/rawmemchr.S (__rawmemchr): Add libc_hidden_def. * sysdeps/alpha/alphaev67/stpncpy.S (__stpncpy): Likewise. * sysdeps/alpha/rawmemchr.S (__rawmemchr): Likewise. * sysdeps/alpha/stpncpy.S (__stpncpy): Likewise. * sysdeps/generic/chown.c (__chown): Likewise. * sysdeps/generic/close.c (__close): Likewise. * sysdeps/generic/dup2.c (__dup2): Likewise. * sysdeps/generic/pipe.c (__pipe): Likewise. * sysdeps/generic/prof-freq.c (__profile_frequency): Likewise. * sysdeps/generic/pwrite64.c (__pwrite64): Likewise. * sysdeps/generic/rawmemchr.c (__rawmemchr): Likewise. * sysdeps/generic/read.c (__libc_read): Likewise. (__read): Add libc_hidden_weak. * sysdeps/generic/sbrk.c (__sbrk): Add libc_hidden_def. * sysdeps/generic/sched_sets.c (__sched_setscheduler): Likewise. * sysdeps/generic/select.c (__select): Likewise. * sysdeps/generic/send.c (__send): Likewise. * sysdeps/generic/setpgid.c (__setpgid): Likewise. * sysdeps/generic/sigaction.c (__sigaction): Likewise. * sysdeps/generic/sigsuspend.c (__sigsuspend): Likewise. * sysdeps/generic/statfs.c (__statfs): Likewise. * sysdeps/generic/stpncpy.c (__stpncpy): Likewise. * sysdeps/generic/strcasecmp.c (__strcasecmp): Likewise. * sysdeps/generic/getpagesize.c (__getpagesize): Likewise. Remove undef and INTDEF. * sysdeps/generic/getpgid.c (__getpgid): Likewise. * sysdeps/generic/getpid.c (__getpid): Likewise. * sysdeps/generic/write.c (__libc_write): Likewise. (__write): Add libc_hidden_weak. Remove undef and INTDEF. * sysdeps/i386/rawmemchr.S (__rawmemchr): Add libc_hidden_def. * sysdeps/i386/stpncpy.S (__stpncpy): Likewise. * sysdeps/m68k/rawmemchr.S (__rawmemchr): Likewise. * sysdeps/mach/hurd/chown.c (__chown): Likewise. Remove INTDEF. * sysdeps/mach/hurd/close.c (__close): Add libc_hidden_def. Remove undef and INTDEF. * sysdeps/mach/hurd/dup2.c (__dup2): Likewise. * sysdeps/mach/hurd/getpgid.c (__getpgid): Likewise. * sysdeps/mach/hurd/getpid.c (__getpid): Likewise. * sysdeps/mach/getpagesize.c (__getpagesize): Likewise. * sysdeps/mach/hurd/write.c (__libc_write): Likewise. (__write): Add libc_hidden_weak. Remove undef and INTDEF. * sysdeps/mach/hurd/pipe.c: Include unistd.h. (__pipe): Add libc_hidden_def. * sysdeps/mach/hurd/dl-sysdep.c (__libc_read, __libc_write): Add libc_hidden_weak. * sysdeps/mach/hurd/poll.c (__poll): Add libc_hidden_def. * sysdeps/mach/hurd/profil.c (__profile_frequency): Likewise. * sysdeps/mach/hurd/read.c (__libc_read): Likewise. (__read): Add libc_hidden_weak. * sysdeps/mach/hurd/pwrite64.c (__pwrite64): Likewise. (__libc_pwrite64): Add libc_hidden_def. * sysdeps/mach/hurd/sbrk.c (__sbrk): Likewise. * sysdeps/mach/hurd/select.c (__select): Likewise. * sysdeps/mach/hurd/send.c (__send): Likewise. * sysdeps/mach/hurd/setpgid.c (__setpgid): Likewise. * sysdeps/mach/hurd/sigaction.c (__sigaction): Likewise. * sysdeps/mach/hurd/sigsuspend.c (__sigsuspend): Likewise. * sysdeps/mach/hurd/statfs.c (__statfs): Likewise. * sysdeps/posix/dup2.c: Likewise. Remove undef and INTDEF. * sysdeps/posix/getpagesize.c (__getpagesize): Likewise. * sysdeps/posix/pwrite64.c (__libc_pwrite64): Add libc_hidden_def. (__pwrite64): Add libc_hidden_weak. * sysdeps/posix/sigsuspend.c (__sigsuspend): Add libc_hidden_def. * sysdeps/sparc/sparc64/rawmemchr.S (__rawmemchr): Likewise. * sysdeps/sparc/sparc64/stpncpy.S (__stpncpy): Likewise. * sysdeps/standalone/close.c (__close): Likewise. * sysdeps/standalone/write.c (__libc_write): Likewise. (__write): Add libc_hidden_weak. * sysdeps/standalone/read.c (__read): Likewise. (__libc_read): Add libc_hidden_def. * sysdeps/unix/grantpt.c (grantpt): Remove INTUSE. * sysdeps/unix/bsd/m68k/pipe.S (__pipe): Add libc_hidden_def. * sysdeps/unix/bsd/osf/alpha/pipe.S (__pipe): Likewise. * sysdeps/unix/bsd/vax/pipe.S (__pipe): Likewise. * sysdeps/unix/bsd/syscalls.list (__GI___getpagesize): Likewise. * sysdeps/unix/bsd/poll.c (__poll): Likewise. * sysdeps/unix/bsd/sigaction.c (__sigaction): Likewise. * sysdeps/unix/bsd/sigsuspend.c (__sigsuspend): Likewise. * sysdeps/unix/common/syscalls.list (__GI___getpgid, __GI___setpgid, __GI___sigaction): Add. * sysdeps/unix/i386/pipe.S (__pipe): Add libc_hidden_def. * sysdeps/unix/inet/syscalls.list (__GI___send): Add. * sysdeps/unix/mips/pipe.S (__pipe): Add libc_hidden_def. * sysdeps/unix/sparc/pipe.S (__pipe): Likewise. * sysdeps/unix/sysv/irix4/syscalls.list (__GI___getpgid, __GI___setpgid): Add. * sysdeps/unix/sysv/aix/chown.c (__chown): Add libc_hidden_def. Remove undef and INTDEF. * sysdeps/unix/sysv/aix/getpgid.c (__getpgid): Likewise. * sysdeps/unix/sysv/aix/write.c (__write, __libc_write): Likewise. * sysdeps/unix/sysv/aix/close.c (__close): Add libc_hidden_def. * sysdeps/unix/sysv/aix/getpid.c (__getpid): Likewise. * sysdeps/unix/sysv/aix/pipe.c (__pipe): Likewise. * sysdeps/unix/sysv/aix/read.c (__read, __libc_read): Likewise. * sysdeps/unix/sysv/aix/poll.c (__poll): Likewise. * sysdeps/unix/sysv/aix/sbrk.c (__sbrk): Likewise. * sysdeps/unix/sysv/aix/sigaction.c (__sigaction): Likewise. * sysdeps/unix/sysv/aix/sigsuspend.c (__sigsuspend): Likewise. * sysdeps/unix/sysv/aix/statfs.c (__statfs): Likewise. * sysdeps/unix/sysv/aix/select.c (__select): Likewise. * sysdeps/unix/sysv/aix/setpgid.c (__setpgid): Likewise. * sysdeps/unix/sysv/linux/alpha/pipe.S (__pipe): Likewise. * sysdeps/unix/sysv/linux/alpha/syscalls.list (__GI___pwrite64, __GI___statfs, __GI___send): Add. * sysdeps/unix/sysv/linux/alpha/select.S (__select): Add libc_hidden_ver resp. libc_hidden_def. * sysdeps/unix/sysv/linux/alpha/sigsuspend.S (__sigsuspend): Add libc_hidden_def. * sysdeps/unix/sysv/linux/ia64/getpagesize.c (__getpagesize): Likewise. Remove undef and INTDEF. * sysdeps/unix/sysv/linux/ia64/pipe.S (__pipe): Add libc_hidden_def. * sysdeps/unix/sysv/linux/ia64/syscalls.list (__GI___pwrite64, __GI___statfs, __GI___send): Add. * sysdeps/unix/sysv/linux/ia64/sigaction.c (__sigaction): Add libc_hidden_def. * sysdeps/unix/sysv/linux/ia64/sigsuspend.c (__sigsuspend): Likewise. * sysdeps/unix/sysv/linux/sh/pipe.S (__pipe): Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/chown.c (__chown): Add libc_hidden_ver resp. libc_hidden_def. * sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (__GI___pwrite64, __GI___send): Add. * sysdeps/unix/sysv/linux/s390/s390-64/sigaction.c (__sigaction): Add libc_hidden_weak. * sysdeps/unix/sysv/linux/s390/s390-64/sigsuspend.c (__sigsuspend): Add libc_hidden_def. * sysdeps/unix/sysv/linux/hppa/syscalls.list (__GI___send): Add. * sysdeps/unix/sysv/linux/arm/sigaction.c (__sigaction): Add libc_hidden_weak. * sysdeps/unix/sysv/linux/i386/chown.c (__chown): Add libc_hidden_ver resp. libc_hidden_def. * sysdeps/unix/sysv/linux/i386/sigaction.c (__sigaction): Add libc_hidden_weak. * sysdeps/unix/sysv/linux/m68k/chown.c (__chown): Likewise. Remove INTDEF. * sysdeps/unix/sysv/linux/m68k/getpagesize.c (__getpagesize): Likewise. Remove undef. * sysdeps/unix/sysv/linux/mips/pwrite64.c (__pwrite64): Add libc_hidden_weak. * sysdeps/unix/sysv/linux/mips/syscalls.list (__GI___send): Add. * sysdeps/unix/sysv/linux/mips/sigaction.c (__sigaction): Add libc_hidden_weak. * sysdeps/unix/sysv/linux/powerpc/chown.c (__chown): Add libc_hidden_def. * sysdeps/unix/sysv/linux/powerpc/pwrite64.c (__pwrite64): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/getpagesize.c (__getpagesize): Likewise. Remove undef and INTDEF. * sysdeps/unix/sysv/linux/sparc/sparc32/pipe.S (__pipe): Add libc_hidden_def. * sysdeps/unix/sysv/linux/sparc/sparc32/sigaction.c (__sigaction): Add libc_hidden_weak. * sysdeps/unix/sysv/linux/sparc/sparc64/pipe.S (__pipe): Add libc_hidden_def. * sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list (__GI___pwrite64, __GI___statfs, __GI___select, __GI___send): Add. * sysdeps/unix/sysv/linux/sparc/sparc64/sigaction.c (__sigaction): Add libc_hidden_weak. * sysdeps/unix/sysv/linux/sparc/sparc64/sigsuspend.c (__sigsuspend): Add libc_hidden_def. * sysdeps/unix/sysv/linux/x86_64/syscalls.list (__GI___pwrite64, __GI___statfs): Add. * sysdeps/unix/sysv/linux/x86_64/send.c (__send): Add libc_hidden_weak. * sysdeps/unix/sysv/linux/x86_64/sigaction.c (__sigaction): Likewise. * sysdeps/unix/sysv/linux/getpagesize.c: Add libc_hidden_def. Remove undef and INTDEF. * sysdeps/unix/sysv/linux/poll.c (__poll): Add libc_hidden_def. * sysdeps/unix/sysv/linux/pwrite64.c (__pwrite64): Add libc_hidden_def. * sysdeps/unix/sysv/linux/send.S (__send): Likewise. * sysdeps/unix/sysv/linux/sigaction.c (__sigaction): Add libc_hidden_weak. * sysdeps/unix/sysv/linux/sigsuspend.c (__sigsuspend): Add libc_hidden_def. * sysdeps/unix/sysv/sco3.2.4/__setpgid.c (__setpgid): Likewise. * sysdeps/unix/sysv/sco3.2.4/sigaction.S (__sigaction): Likewise. * sysdeps/unix/sysv/sysv4/solaris2/syscalls.list (__GI___sigaction): Add. * sysdeps/unix/sysv/sysv4/__getpgid.c (__getpgid): Add libc_hidden_def. Remove undef and INTDEF. * sysdeps/unix/sysv/sysv4/getpgid.c (__getpgid): Likewise. * sysdeps/unix/sysv/sysv4/__setpgid.c (__setpgid): Add libc_hidden_def. * sysdeps/unix/sysv/sysv4/setpgid.c (__setpgid): Likewise. * sysdeps/unix/sysv/sysv4/sigaction.c (__sigaction): Likewise. * sysdeps/unix/sysv/sigaction.c (__sigaction): Likewise. * sysdeps/unix/getpagesize.c (__getpagesize): Add libc_hidden_def. Remove undef and INTDEF. * configure.in (HAVE_BROKEN_VISIBILITY_ATTRIBUTE): Add check for broken visibility attribute handling. * config.h.in (HAVE_BROKEN_VISIBILITY_ATTRIBUTE): Add. 2002-08-02 Ulrich Drepper <drepper@redhat.com>
286 lines
7.6 KiB
C
286 lines
7.6 KiB
C
/* Low-level statistical profiling support function. Mach/Hurd version.
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Copyright (C) 1995, 1996, 1997, 2000, 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <sys/types.h>
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#include <unistd.h>
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#include <errno.h>
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#include <hurd.h>
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#include <mach/mach4.h>
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#include <mach/pc_sample.h>
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#include <cthreads.h>
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#include <assert.h>
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#include <libc-internal.h>
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#define MAX_PC_SAMPLES 512 /* XXX ought to be exported in kernel hdr */
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static thread_t profile_thread = MACH_PORT_NULL;
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static u_short *samples;
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static size_t maxsamples;
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static size_t pc_offset;
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static size_t sample_scale;
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static sampled_pc_seqno_t seqno;
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static spin_lock_t lock = SPIN_LOCK_INITIALIZER;
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static mach_msg_timeout_t collector_timeout; /* ms between collections. */
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static int profile_tick;
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/* Reply port used by profiler thread */
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static mach_port_t profil_reply_port;
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/* Forwards */
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static kern_return_t profil_task_get_sampled_pcs (mach_port_t,
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sampled_pc_seqno_t *,
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sampled_pc_array_t,
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mach_msg_type_number_t *);
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static void fetch_samples (void);
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/* Enable statistical profiling, writing samples of the PC into at most
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SIZE bytes of SAMPLE_BUFFER; every processor clock tick while profiling
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is enabled, the system examines the user PC and increments
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SAMPLE_BUFFER[((PC - OFFSET) / 2) * SCALE / 65536]. If SCALE is zero,
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disable profiling. Returns zero on success, -1 on error. */
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static error_t
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update_waiter (u_short *sample_buffer, size_t size, size_t offset, u_int scale)
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{
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error_t err;
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if (profile_thread == MACH_PORT_NULL)
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{
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/* Set up the profiling collector thread. */
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static void profile_waiter (void);
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err = __thread_create (__mach_task_self (), &profile_thread);
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if (! err)
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err = __mach_setup_thread (__mach_task_self (), profile_thread,
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&profile_waiter, NULL, NULL);
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}
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else
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err = 0;
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if (! err)
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{
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err = __task_enable_pc_sampling (__mach_task_self (), &profile_tick,
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SAMPLED_PC_PERIODIC);
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if (!err && sample_scale == 0)
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/* Profiling was not turned on, so the collector thread was
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suspended. Resume it. */
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err = __thread_resume (profile_thread);
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if (! err)
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{
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samples = sample_buffer;
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maxsamples = size / sizeof *sample_buffer;
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pc_offset = offset;
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sample_scale = scale;
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/* Calculate a good period for the collector thread. From TICK
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and the kernel buffer size we get the length of time it takes
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to fill the buffer; translate that to milliseconds for
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mach_msg, and chop it in half for general lag factor. */
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collector_timeout = MAX_PC_SAMPLES * profile_tick / 1000 / 2;
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}
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}
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return err;
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}
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int
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__profile_frequency (void)
|
||
{
|
||
return profile_tick;
|
||
}
|
||
libc_hidden_def (__profile_frequency)
|
||
|
||
int
|
||
__profil (u_short *sample_buffer, size_t size, size_t offset, u_int scale)
|
||
{
|
||
error_t err;
|
||
|
||
__spin_lock (&lock);
|
||
|
||
if (scale == 0)
|
||
{
|
||
/* Disable profiling. */
|
||
int count;
|
||
|
||
if (profile_thread != MACH_PORT_NULL)
|
||
__thread_suspend (profile_thread);
|
||
|
||
/* Fetch the last set of samples */
|
||
if (sample_scale)
|
||
fetch_samples ();
|
||
|
||
err = __task_disable_pc_sampling (__mach_task_self (), &count);
|
||
sample_scale = 0;
|
||
seqno = 0;
|
||
}
|
||
else
|
||
err = update_waiter (sample_buffer, size, offset, scale);
|
||
|
||
__spin_unlock (&lock);
|
||
|
||
return err ? __hurd_fail (err) : 0;
|
||
}
|
||
weak_alias (__profil, profil)
|
||
|
||
/* Fetch PC samples. This function must be very careful not to depend
|
||
on Hurd threadvar variables. We arrange that by using a special
|
||
stub arranged for at the end of this file. */
|
||
static void
|
||
fetch_samples (void)
|
||
{
|
||
sampled_pc_t pc_samples[MAX_PC_SAMPLES];
|
||
mach_msg_type_number_t nsamples, i;
|
||
error_t err;
|
||
|
||
nsamples = MAX_PC_SAMPLES;
|
||
|
||
err = profil_task_get_sampled_pcs (__mach_task_self (), &seqno,
|
||
pc_samples, &nsamples);
|
||
if (err)
|
||
{
|
||
static error_t special_profil_failure;
|
||
static volatile int a, b, c;
|
||
|
||
special_profil_failure = err;
|
||
a = 1;
|
||
b = 0;
|
||
while (1)
|
||
c = a / b;
|
||
}
|
||
|
||
for (i = 0; i < nsamples; ++i)
|
||
{
|
||
/* Do arithmetic in long long to avoid overflow problems. */
|
||
long long pc_difference = pc_samples[i].pc - pc_offset;
|
||
size_t idx = ((pc_difference / 2) * sample_scale) / 65536;
|
||
if (idx < maxsamples)
|
||
++samples[idx];
|
||
}
|
||
}
|
||
|
||
|
||
/* This function must be very careful not to depend on Hurd threadvar
|
||
variables. We arrange that by using special stubs arranged for at the
|
||
end of this file. */
|
||
static void
|
||
profile_waiter (void)
|
||
{
|
||
mach_msg_header_t msg;
|
||
mach_port_t timeout_reply_port;
|
||
|
||
profil_reply_port = __mach_reply_port ();
|
||
timeout_reply_port = __mach_reply_port ();
|
||
|
||
while (1)
|
||
{
|
||
__spin_lock (&lock);
|
||
|
||
fetch_samples ();
|
||
|
||
__spin_unlock (&lock);
|
||
|
||
__mach_msg (&msg, MACH_RCV_MSG|MACH_RCV_TIMEOUT, 0, sizeof msg,
|
||
timeout_reply_port, collector_timeout, MACH_PORT_NULL);
|
||
}
|
||
}
|
||
|
||
/* Fork interaction */
|
||
|
||
/* Before fork, lock the interlock so that we are in a clean state. */
|
||
static void
|
||
fork_profil_prepare (void)
|
||
{
|
||
__spin_lock (&lock);
|
||
}
|
||
text_set_element (_hurd_fork_prepare_hook, fork_profil_prepare);
|
||
|
||
/* In the parent, unlock the interlock once fork is complete. */
|
||
static void
|
||
fork_profil_parent (void)
|
||
{
|
||
__spin_unlock (&lock);
|
||
}
|
||
text_set_element (_hurd_fork_parent_hook, fork_profil_parent);
|
||
|
||
/* In the childs, unlock the interlock, and start a profiling thread up
|
||
if necessary. */
|
||
static void
|
||
fork_profil_child (void)
|
||
{
|
||
u_short *sb;
|
||
size_t n, o, ss;
|
||
error_t err;
|
||
|
||
__spin_unlock (&lock);
|
||
|
||
if (profile_thread != MACH_PORT_NULL)
|
||
{
|
||
__mach_port_deallocate (__mach_task_self (), profile_thread);
|
||
profile_thread = MACH_PORT_NULL;
|
||
}
|
||
|
||
sb = samples;
|
||
samples = NULL;
|
||
n = maxsamples;
|
||
maxsamples = 0;
|
||
o = pc_offset;
|
||
pc_offset = 0;
|
||
ss = sample_scale;
|
||
sample_scale = 0;
|
||
|
||
if (ss != 0)
|
||
{
|
||
err = update_waiter (sb, n * sizeof *sb, o, ss);
|
||
assert_perror (err);
|
||
}
|
||
}
|
||
text_set_element (_hurd_fork_child_hook, fork_profil_child);
|
||
|
||
|
||
|
||
|
||
/* Special RPC stubs for profile_waiter are made by including the normal
|
||
source code, with special CPP state to prevent it from doing the
|
||
usual thing. */
|
||
|
||
/* Include these first; then our #define's will take full effect, not
|
||
being overridden. */
|
||
#include <mach/mig_support.h>
|
||
|
||
/* This need not do anything; it is always associated with errors, which
|
||
are fatal in profile_waiter anyhow. */
|
||
#define __mig_put_reply_port(foo)
|
||
|
||
/* Use our static variable instead of the usual threadvar mechanism for
|
||
this. */
|
||
#define __mig_get_reply_port() profil_reply_port
|
||
|
||
/* Make the functions show up as static */
|
||
#define mig_external static
|
||
|
||
/* Turn off the attempt to generate ld aliasing records. */
|
||
#undef weak_alias
|
||
#define weak_alias(a,b)
|
||
|
||
/* And change their names to avoid confusing disasters. */
|
||
#define __vm_deallocate_rpc profil_vm_deallocate
|
||
#define __task_get_sampled_pcs profil_task_get_sampled_pcs
|
||
|
||
/* And include the source code */
|
||
#include <../mach/RPC_task_get_sampled_pcs.c>
|