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authorUlrich Drepper <drepper@redhat.com>1997-09-11 12:09:10 +0000
committerUlrich Drepper <drepper@redhat.com>1997-09-11 12:09:10 +0000
commit9a0a462ceb4ab96c909b182f3052de2ef13fbe3a (patch)
tree59456497b6acefe69aab04fc28c38ea38852ccc7 /elf/dl-profile.c
parent26b4d7667169f8db26fd8194b3c498ec58e50f90 (diff)
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Update.
1997-09-11 04:36 Ulrich Drepper <drepper@cygnus.com> * db2/db_int.h: Define __set_errno if not yet available. * db2/btree/bt_rec.c: Use __set_errno to set errno value. * db2/clib/getlong.c: Likewise. * db2/db185/db185.c: Likewise. * db2/db185/db185_int.h: Likewise. * db2/dbm/dbm.c: Likewise. * db2/lock/lock_deadlock.c: Likewise. * db2/log/log_archive.c: Likewise. * elf/dl-profile.c: Implement mcount function. * gmon/gmon.c: Use __profil not profil because of namespace pollution. * gmon/mcount.c: Remove BSD kernel code. Use compare&swap instruction if possible to change state variable. Optimize frompc folding. * gmon/sys/gmon.h (struct gmonparam): Change state field to long int. * sysdeps/i386/i486/atomicity.h: New file. * sysdeps/stub/atomicity.h: New file. * sysdeps/mach/hurd/profil.c: Define function as __profil and make profil weak alias. * sysdeps/posix/profil.c: Likewise. * string/bits/string2.h: New file. * include/bits/string2.h: New file. * string/Makefile (routines): Add mempcpy. (tests): Add inl-tester. Remove _D__NO_STRING_INLINES from CFLAGS-* variables. * sysdeps/generic/mempcpy.c: New file. * sysdeps/generic/memccpy.c: Undef function name to enable definition as macro. * sysdeps/generic/memchr.c: Likewise. * sysdeps/generic/memcmp.c: Likewise. * sysdeps/generic/memmem.c: Likewise. * sysdeps/generic/memmove.c: Likewise. * sysdeps/generic/strcat.c: Likewise. * sysdeps/generic/strchr.c: Likewise. * sysdeps/generic/strcmp.c: Likewise. * sysdeps/generic/strcpy.c: Likewise. * sysdeps/generic/strcspn.c: Likewise. * sysdeps/generic/strlen.c: Likewise. * sysdeps/generic/strncat.c: Likewise. * sysdeps/generic/strncmp.c: Likewise. * sysdeps/generic/strncpy.c: Likewise. * sysdeps/generic/strpbrk.c: Likewise. * sysdeps/generic/strrchr.c: Likewise. * sysdeps/generic/strsep.c: Likewise. * sysdeps/generic/strspn.c: Likewise. * sysdeps/generic/strstr.c: Likewise. * sysdeps/generic/strtok.c: Likewise. * sysdeps/generic/strtok_r.c: Likewise. * sysdeps/i386/memset.c: Likewise. * sysdeps/i386/bits/string.h: Correct a few types and constraints. * sysdeps/i386/i486/bits/string.h: Heavy rewrites and optimizations. * string/stratcliff.c: Undefine __USE_STRING_INLINES. * string/tst-strlen.c: Likewise. * string/string.h: Add prototype for mempcpy. Include bits/string2.h header always if optimizing. * intl/dcgettext.c: Don't unconditionally define stpcpy, only if not yet defined. * intl/l10nflist.c: Likewise. * string/tester.c: Add copyright and make little cleanups. * inet/test_ifindex.c: Change type of ni variable to unsigned int. * locale/programs/ld-ctype.c (struct locale_ctype_t): Change type of fields map_collection_max and map_collection_act to size_t. * nss/libnss_files.map: Group entries. * posix/unistd.h: Add prototype for __setpgid and __profil. * sysdeps/generic/crypt.h: Declare __crypt_r. * sysdeps/i386/bits/select.h: Fix fatal bugs, use correct casts now. * sysdeps/i386/fpu/bits/mathinline.h (isgreater, isgreaterequal, isless, islessequal, islessgreater, isunordered): Optimize a bit. * sysdeps/stub/ftruncate.c: Include missing header for prototype. * sysdeps/stub/getdents.c: Likewise. * sysdeps/stub/reboot.c: Likewise. * sysdeps/stub/swapon.c: Likewise. * sysdeps/stub/syscall.c: Likewise. * sysdeps/stub/ualarm.c: Likewise. * sysdeps/stub/usleep.c: Likewise. * sysdeps/unix/sysv/linux/if_index.c: Don't compile or use opensock if SIOGIFINDEX and SIOGIFNAME are not defined. * sysdeps/unix/sysv/linux/net/if.h: Add IFF_PORTSEL and IFF_AUTOMEDIA according to recent kernel changes. 1997-09-10 21:32 Klaus Espenlaub <kespenla@student.informatik.uni-ulm.de> * Makeconfig: Use $(have-initfini) instead of $(elf) to figure out the installed name of the startup code. (common-generated): Add version.mk. * Makefile (distclean-1): Add glibcbug. * Makerules: Replace -lgcc by $(gnulib). * catgets/Makefile (generated): Add xmalloc.o. * csu/Makefile (generated): Replace align.h and end.h by defs.h to match the generated file. * manual/Makefile (mostlyclean): Add stub-manual and stamp.o. (realclean): Changed to remove chapters-incl[12]. * po/Makefile (realclean): New rule to remove the generated .mo files. * time/Makefile: Only include zonefile dependencies if $(no_deps) is not true to avoid make clean failure when directory time doesn't exist yet. (generated): Add tzselect. * stdio/fgets.c (fgets): Add casts to reduce gcc warning noise. * stdio/internals.c (flushbuf): Likewise. * stdio/linewrap.c (lwupdate): Likewise. * stdio/memstream.c (enlarge_buffer): Likewise. * stdio-common/vfscanf.c (_IO_vfscanf): Likewise. * time/tzset.c (compute_change): Likewise. * misc/init-misc.c (__init_misc): Only declare static if HAVE_GNU_LD is defined. * sysdeps/posix/pipestream.c (FUNC): Change to generate ANSI C style functions. * sysdeps/stub/init-posix.c: Likewise. * sysdeps/stub/profil.c: Likewise. * munch-tmpl.c (__libc_init): Convert to ANSI C style declaration to reduce gcc warning noise. * stdio/glue.c (_filbuf, _flsbuf): Likewise. * stdio/obstream.c (grow, seek, input, init_obstream): Likewise. * stdio/vasprintf.c (enlarge_buffer): Likewise. * sysdeps/generic/sysd-stdio.c (__stdio_read, __stdio_write, __stdio_seek, __stdio_close, __stdio_fileno, __stdio_open, __stdio_reopen): Likewise. * sysdeps/posix/defs.c (_cleanup): Likewise. * time/offtime.c (__offtime): Add cast. * posix/getopt.c: Don't use text_set_element if not defined. * configure.in: Provide a check for underscores before user labels that works even when the compiler used for building doesn't work (like when there is no C library). Use the old way if the compiler works. 1997-09-10 05:08 David S. Miller <davem@caip.rutgers.edu> * sysdeps/unix/sysv/linux/sparc/bits/ioctls.h: The TC* ioctls use 'T' not 't' on SparcLinux. * sysdeps/unix/sysv/linux/sparc/bits/termios.h: tcflag_t is 32 bits. * sysdeps/unix/sysv/linux/sparc/sparc64/longjmp.S: Add aliases for _longjmp and siglongjmp. 1997-09-09 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * libio/stdio.h: Add format attributes to the extra printf and scanf like functions. * stdio/stdio.h: Likewise. 1997-09-09 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * nis/nss_nisplus/nisplus-network.c (_nss_nisplus_getnetbyaddr_r): Print tablename_val, not tablename_len. * nis/nss_nisplus/nisplus-ethers.c (_nss_nisplus_getntohost_r): Use sprintf instead of sprintf, the string always fits. * nis/nss_nisplus/nisplus-hosts.c (_nss_nisplus_gethostbyaddr_r): Likewise. * nis/nss_nisplus/nisplus-network.c (_nss_nisplus_getnetbyaddr_r): Likewise. * nis/nss_nisplus/nisplus-proto.c (_nss_nisplus_getprotobynumber_r): Likewise. * nis/nss_nisplus/nisplus-rpc.c (_nss_nisplus_getrpcbynumber_r): Likewise. * nis/nss_nisplus/nisplus-service.c (_nss_nisplus_getservbynumber_r): Likewise. * nis/nss_nisplus/nisplus-alias.c (_nss_create_tablename): Use __stpcpy, __stpncpy and __strdup instead of public names. * nis/nss_nisplus/nisplus-ethers.c (_nss_create_tablename): Likewise. * nis/nss_nisplus/nisplus-grp.c (_nss_create_tablename): Likewise. * nis/nss_nisplus/nisplus-hosts.c (_nss_create_tablename): Likewise. * nis/nss_nisplus/nisplus-netgrp.c (_nss_nisplus_parse_netgroup): Likewise. * nis/nss_nisplus/nisplus-network.c (_nss_nisplus_parse_netent): Likewise. (_nss_create_tablename): Likewise. * nis/nss_nisplus/nisplus-proto.c (_nss_nisplus_parse_protoent): Likewise. (_nss_create_tablename): Likewise. * nis/nss_nisplus/nisplus-pwd.c (_nss_create_tablename): Likewise. * nis/nss_nisplus/nisplus-rpc.c (_nss_nisplus_parse_rpcent): Likewise. (_nss_create_tablename): Likewise. * nis/nss_nisplus/nisplus-service.c (_nss_nisplus_parse_servent): Likewise. (_nss_create_tablename): Likewise. * nis/nss_nisplus/nisplus-spwd.c (_nss_create_tablename): Likewise. * libc.map: Export __stpcpy and __strdup. 1997-09-09 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * math/Makefile (CFLAGS-test-float.c, CFLAGS-test-double.c, CFLAGS-test-ldouble.c): Pass -ffloat-store to avoid excessive precision. 1997-09-09 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * include/rpc/auth_des.h: New file. 1997-09-09 Paul Eggert <eggert@twinsun.com> * time/mktime.c (__mktime_internal): Declare sec_requested even if !LEAP_SECONDS_POSSIBLE, since it's needed at the end when checking for time_t overflow. 1997-09-09 22:11 Ulrich Drepper <drepper@cygnus.com> * sysdeps/posix/getcwd.c: Correct test for too small buffer. Reported by Erik Troan <ewt@redhat.com>. * elf/dl-close.c: Include <bits/libc-lock.h>, not <libc-lock.h>. * elf/dl-open.c: Likewise. 1997-09-07 17:09 Richard Henderson <rth@cygnus.com> * sysdeps/alpha/Makefile: Kill setjmp_aux. * sysdeps/alpha/bits/setjmp.h: Rewrite in terms of an array. * sysdeps/alpha/__longjmp.c: Remove. * sysdeps/alpha/setjmp_aux.c: Remove. * sysdeps/alpha/__longjmp.S: New file. * sysdeps/alpha/bsd-_setjmp.S: Stub out. * sysdeps/alpha/bsd-setjmp.S: Likewise. * sysdeps/alpha/setjmp.S: Do the work; don't call __setjmp_aux. Move _setjmp and setjmp from bsd-*.S. 1997-09-06 20:20 Ulrich Drepper <drepper@cygnus.com> * include/rpc/auth.h: New file. * include/rpc/auth_unix.h: New file. 1997-09-06 Paul Eggert <eggert@twinsun.com> Fix gmtime so that it reports leap seconds when TZ indicates that leap seconds are desired. * time/gmtime.c (<stddef.h>): Remove unnecessary include. (gmtime): Put after gmtime_r, to help the compiler inline. (__tz_convert): New decl. (gmtime_r): Use __tz_convert instead of __offtime, so that leap seconds are handled correctly. * time/localtime.c (<errno.h>, <libc-lock.h>): Remove includes that are now unnecessary. (__tzset_internal, __tz_compute, __tzfile_compute, __use_tzfile, __tzset_lock): Remove extern decls that are now unnecessary. (localtime_internal): Moved to __tz_convert in tzset.c. so that localtime and gmtime can both use it easily. (localtime): Put after localtime_r, to help the compiler inline. (localtime_r): Use __tz_convert instead of localtime_internal. * time/strftime.c (__tz_compute): Remove unused (and now incorrect) decl. * time/tzfile.c (__tzfile_compute): New arg USE_LOCALTIME. * time/tzset.c (<errno.h>): Include. (_tmbuf): New decl. (__tzfile_compute): New function. (tz_compute): Renamed from __tz_compute. No longer extern. Remove redundant call to tzset_internal. (tzset_internal): Renamed from __tzset_internal. No longer extern. (tzset_lock): Renamed from __tzset_lock. No longer extern. (__tz_convert): New function, containing functionality of old localtime_internal function, plus locking and optional UTC. 1997-09-06 Paul Eggert <eggert@twinsun.com> * time/tzfile.c (__tzfile_read): Don't read a file if TZ is the empty string, just use UTC without leap seconds. This is for compatibility with the Olson code. 1997-09-06 Paul Eggert <eggert@twinsun.com> * time/tzset.c (__tzname_max): Lock tz data structures before invoking tzset_internal. * time/tzfile.c: Define compute_tzname_max statically. 1997-09-07 10:57 Thorsten Kukuk <kukuk@vt.uni-paderborn.de> * nis/nis_call.c: Remove not longer necessary HAVE_SECURE_RPC ifdefs. * nis/nis_intern.h: Likewise. * nis/nss_nis/nis-publickey.c: Likewise. * nis/nss_nisplus/nisplus-publickey.c: Likewise. * nis/ypclnt.c: Likewise. * sunrpc/auth_des.c: Don't dereference NULL pointer, initialize ad->ad_timediff. * sunrpc/auth_none.c: Don't define our own prototypes, use the one from the header files. * sunrpc/auth_unix.c: Likewise. * sunrpc/clnt_raw.c: Likewise. * sunrpc/clnt_tcp.c: Likewise. * sunrpc/rpc_cmsg.c: Likewise. * sunrpc/key_call.c: Fix signal handling. * sunrpc/openchild.c: Don't use /bin/sh to start /usr/etc/keyenvoy, or we will get a deadlock with NIS+. * sunrpc/rpc/auth.h: Add prototype for xdr_opaque_auth, don't define HAVE_SECURE_RPC. 1997-09-07 15:51 Ulrich Drepper <drepper@cygnus.com> * sysdeps/i386/bits/select.h [__GNUC__] (__FD_ZERO, __FD_SET, __FD_CLR, __FD_ISSET): Use correct casts to address array correctly. Reported by urbanw@cs.umu.se. 1997-09-07 05:07 Ulrich Drepper <drepper@cygnus.com> * elf/dl-close.c: Include <bits/libc-lock.h>, not <libc-lock.h>. * elf/dl-open.c: Likewise. * sysdeps/i386/memset.c: Undefine memset in case the header with the optimized functions is included. Patches by NIIBE Yutaka <gniibe@mri.co.jp>. * sysdeps/i386/bits/string.h [__PIC__] (strcspn, strspn, strpbrk, strsep): Use register for second parameter. * sysdeps/i386/i486/bits/string.h: Likewise. Reported by NIIBE Yutaka <gniibe@mri.co.jp>. 1997-09-03 09:48 Geoff Keating <geoffk@ozemail.com.au> * math/libm-test.c: Change various tolerances to match what the tested routines can actually provide. * math/Makefile: Add new tests. * math/atest-sincos.c: New file. * math/atest-exp.c: New file. * csu/Makefile: Give initfini.s and initfiniS.s their own CFLAGS-* macros so they can be overridden. * sysdeps/powerpc/Makefile [subdir=csu]: Override flags for initfiniS.s to use -fpic instead of -fPIC, because the sed script breaks otherwise. * sysdeps/powerpc/Makefile [build-shared]: Use -fpic not -fPIC for efficiency. * sysdeps/powerpc/dl-machine.h (ELF_MACHINE_RUNTIME_TRAMPOLINE): Don't use register 0, to let _mcount be in a shared object. * sysdeps/powerpc/dl-machine.h: Use full sentences in comments. Generally clean up. Suppress some code we don't need when relocating ld.so. * sysdeps/powerpc/test-arith.c: Change loop indices to size_t when appropriate to suppress gcc warning. * resolv/res_send.c: Suppress warning. * sunrpc/xdr_sizeof.c: Suppress warning. * FAQ: Add ppc-linux. * manual/maint.texi: Add ppc-linux. Explain that gcc can't build it yet. * sysdeps/unix/sysv/linux/powerpc/profil-counter.h: Correct for current kernels. 1997-08-15 07:45 Geoff Keating <geoffk@ozemail.com.au> * stdlib/fmtmsg.c: Use two parameters for __libc_once_define. * sysdeps/i386/machine-gmon.h: Correct typo. * sysdeps/unix/sysv/linux/powerpc/bits/mman.h: Change to match kernel. * sysdeps/generic/dl-sysdep.c: Add hook for bizzare PPC argument hack. * sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c: Rewrite to use sysdeps/linux/dl-sysdep.c. * sysdeps/powerpc/Makefile [subdir=gmon]: Compile ppc-mcount. * sysdeps/powerpc/machine-gmon.h: Use ppc-mcount. * sysdeps/powerpc/ppc-mcount: New file. The following are mostly changes to allow profiling: * sysdeps/powerpc/add_n.S: Added. * sysdeps/powerpc/add_n.s: Removed. * sysdeps/powerpc/addmul_1.S: Added. * sysdeps/powerpc/addmul_1.s: Removed. * sysdeps/powerpc/bsd-_setjmp.S: Use JUMPTARGET macro. * sysdeps/powerpc/bsd-setjmp.S: Use JUMPTARGET macro. * sysdeps/powerpc/lshift.S: Added. * sysdeps/powerpc/lshift.s: Removed. * sysdeps/powerpc/memset.S: Added. * sysdeps/powerpc/memset.s: Removed. * sysdeps/powerpc/mul_1.S: Added. * sysdeps/powerpc/mul_1.s: Removed. * sysdeps/powerpc/rshift.S: Added. * sysdeps/powerpc/rshift.s: Removed. * sysdeps/powerpc/s_copysign.S: Use ENTRY, END, weak_alias macros. * sysdeps/powerpc/s_fabs.S: Use ENTRY, END, weak_alias macros. * sysdeps/powerpc/setjmp.S: Use JUMPTARGET macro. * sysdeps/powerpc/strchr.S: Added. * sysdeps/powerpc/strchr.s: Removed. * sysdeps/powerpc/strcmp.S: Added. * sysdeps/powerpc/strcmp.s: Removed. * sysdeps/powerpc/strlen.S: Added. * sysdeps/powerpc/strlen.s: Removed. * sysdeps/powerpc/sub_n.S: Added. * sysdeps/powerpc/sub_n.s: Removed. * sysdeps/powerpc/submul_1.S: Added. * sysdeps/powerpc/submul_1.s: Removed. * sysdeps/unix/sysv/linux/powerpc/_exit.S: Removed. * sysdeps/unix/sysv/linux/powerpc/brk.S: Added. * sysdeps/unix/sysv/linux/powerpc/brk.c: Removed. * sysdeps/unix/sysv/linux/powerpc/clone.S: Use new macros. Fix various bugs. Document that it isn't tested. * sysdeps/unix/sysv/linux/powerpc/sigreturn.S: Make look like sysdeps/unix/_exit.S. * sysdeps/unix/sysv/linux/powerpc/socket.S: Use new macros. * sysdeps/unix/sysv/linux/powerpc/syscall.S: Use new macros. * sysdeps/unix/sysv/linux/powerpc/sysdep.h: Define some new macros to make assembler (possibly) more portable, allow profiling, etc.
Diffstat (limited to 'elf/dl-profile.c')
-rw-r--r--elf/dl-profile.c167
1 files changed, 133 insertions, 34 deletions
diff --git a/elf/dl-profile.c b/elf/dl-profile.c
index c8028a7c5a..9b020e8fe9 100644
--- a/elf/dl-profile.c
+++ b/elf/dl-profile.c
@@ -2,6 +2,7 @@
Copyright (C) 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+ Based on the BSD mcount implementation.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
@@ -30,6 +31,7 @@
#include <sys/gmon_out.h>
#include <sys/mman.h>
#include <sys/stat.h>
+#include <atomicity.h>
/* The LD_PROFILE feature has to be implemented different to the
normal profiling using the gmon/ functions. The problem is that an
@@ -146,19 +148,19 @@ static long int state;
static volatile uint16_t *kcount;
static size_t kcountsize;
-struct here_tostruct
+struct here_fromstruct
{
struct here_cg_arc_record volatile *here;
uint16_t link;
};
-static uint16_t *froms;
-static size_t fromssize;
-
-static struct here_tostruct *tos;
+static uint16_t *tos;
static size_t tossize;
-static size_t tolimit;
-static size_t toidx;
+
+static struct here_fromstruct *froms;
+static size_t fromssize;
+static size_t fromlimit;
+static size_t fromidx;
static uintptr_t lowpc;
static uintptr_t highpc;
@@ -170,6 +172,11 @@ static unsigned int log_hashfraction;
static struct gmon_hdr *addr;
static off_t expected_size;
+/* See profil(2) where this is described. */
+static int s_scale;
+#define SCALE_1_TO_1 0x10000L
+
+
/* Set up profiling data to profile object desribed by MAP. The output
file is found (or created) in OUTPUT_DIR. */
@@ -184,7 +191,7 @@ _dl_start_profile (struct link_map *map, const char *output_dir)
ElfW(Addr) mapend = 0;
struct gmon_hdr gmon_hdr;
struct gmon_hist_hdr hist_hdr;
- char *hist;
+ char *hist, *cp;
size_t idx;
/* Compute the size of the sections which contain program code. */
@@ -205,9 +212,9 @@ _dl_start_profile (struct link_map *map, const char *output_dir)
with the same formulars as in `monstartup' (see gmon.c). */
state = GMON_PROF_OFF;
lowpc = ROUNDDOWN (mapstart + map->l_addr,
- HISTFRACTION * sizeof(HISTCOUNTER));
+ HISTFRACTION * sizeof (HISTCOUNTER));
highpc = ROUNDUP (mapend + map->l_addr,
- HISTFRACTION * sizeof(HISTCOUNTER));
+ HISTFRACTION * sizeof (HISTCOUNTER));
textsize = highpc - lowpc;
kcountsize = textsize / HISTFRACTION;
hashfraction = HASHFRACTION;
@@ -217,17 +224,17 @@ _dl_start_profile (struct link_map *map, const char *output_dir)
log_hashfraction = __builtin_ffs (hashfraction * sizeof (*froms)) - 1;
else
log_hashfraction = -1;
- fromssize = textsize / HASHFRACTION;
- tolimit = textsize * ARCDENSITY / 100;
- if (tolimit < MINARCS)
- tolimit = MINARCS;
- if (tolimit > MAXARCS)
- tolimit = MAXARCS;
- tossize = tolimit * sizeof (struct here_tostruct);
+ tossize = textsize / HASHFRACTION;
+ fromlimit = textsize * ARCDENSITY / 100;
+ if (fromlimit < MINARCS)
+ fromlimit = MINARCS;
+ if (fromlimit > MAXARCS)
+ fromlimit = MAXARCS;
+ fromssize = fromlimit * sizeof (struct here_fromstruct);
expected_size = (sizeof (struct gmon_hdr)
+ 4 + sizeof (struct gmon_hist_hdr) + kcountsize
- + 4 + 4 + tossize * sizeof (struct here_cg_arc_record));
+ + 4 + 4 + fromssize * sizeof (struct here_cg_arc_record));
/* Create the gmon_hdr we expect or write. */
memset (&gmon_hdr, '\0', sizeof (struct gmon_hdr));
@@ -247,9 +254,9 @@ _dl_start_profile (struct link_map *map, const char *output_dir)
soname (or the file name) and the ending ".profile". */
filename = (char *) alloca (strlen (output_dir) + 1 + strlen (_dl_profile)
+ sizeof ".profile");
- __stpcpy (__stpcpy (__stpcpy (__stpcpy (filename, output_dir), "/"),
- _dl_profile),
- ".profile");
+ cp = __stpcpy (filename, output_dir);
+ *cp++ = '/';
+ __stpcpy (__stpcpy (cp, _dl_profile), ".profile");
fd = __open (filename, O_RDWR | O_CREAT, 0666);
if (fd == -1)
@@ -356,7 +363,7 @@ _dl_start_profile (struct link_map *map, const char *output_dir)
}
/* Allocate memory for the froms data and the pointer to the tos records. */
- froms = (uint16_t *) calloc (fromssize + tossize, 1);
+ tos = (uint16_t *) calloc (tossize + fromssize, 1);
if (froms == NULL)
{
__munmap ((void *) addr, expected_size);
@@ -364,8 +371,8 @@ _dl_start_profile (struct link_map *map, const char *output_dir)
/* NOTREACHED */
}
- tos = (struct here_tostruct *) ((char *) froms + fromssize);
- toidx = 0;
+ froms = (struct here_fromstruct *) ((char *) tos + tossize);
+ fromidx = 0;
/* Now we have to process all the arc count entries. BTW: it is
not critical whether the *NARCSP value changes meanwhile. Before
@@ -376,17 +383,26 @@ _dl_start_profile (struct link_map *map, const char *output_dir)
frequently used entries at the front of the list. */
for (idx = narcs = *narcsp; idx > 0; )
{
- size_t from_index;
- size_t newtoidx;
+ size_t to_index;
+ size_t newfromidx;
--idx;
- from_index = ((data[idx].from_pc - lowpc)
- / (hashfraction * sizeof (*froms)));
- newtoidx = toidx++;
- tos[newtoidx].here = &data[idx];
- tos[newtoidx].link = froms[from_index];
- froms[from_index] = newtoidx;
+ to_index = ((data[idx].self_pc - lowpc)
+ / (hashfraction * sizeof (*tos)));
+ newfromidx = fromidx++;
+ froms[newfromidx].here = &data[idx];
+ froms[newfromidx].link = tos[to_index];
+ tos[to_index] = newfromidx;
}
+ /* Setup counting data. */
+ if (kcountsize < highpc - lowpc)
+ s_scale = ((double) kcountsize / (highpc - lowpc)) * SCALE_1_TO_1;
+ else
+ s_scale = SCALE_1_TO_1;
+
+ /* Start the profiler. */
+ __profil ((void *) kcount, kcountsize, lowpc, s_scale);
+
/* Turn on profiling. */
state = GMON_PROF_ON;
}
@@ -395,9 +411,12 @@ _dl_start_profile (struct link_map *map, const char *output_dir)
void
_dl_mcount (ElfW(Addr) frompc, ElfW(Addr) selfpc)
{
- if (state != GMON_PROF_ON)
+ uint16_t *topcindex;
+ size_t i, fromindex;
+ struct here_fromstruct *fromp;
+
+ if (! compare_and_swap (&state, GMON_PROF_ON, GMON_PROF_BUSY))
return;
- state = GMON_PROF_BUSY;
/* Compute relative addresses. The shared object can be loaded at
any address. The value of frompc could be anything. We cannot
@@ -411,6 +430,86 @@ _dl_mcount (ElfW(Addr) frompc, ElfW(Addr) selfpc)
if (selfpc >= textsize)
goto done;
+ /* Getting here we now have to find out whether the location was
+ already used. If yes we are lucky and only have to increment a
+ counter (this also has to be atomic). If the entry is new things
+ are getting complicated... */
+
+ /* Avoid integer divide if possible. */
+ if ((HASHFRACTION & (HASHFRACTION - 1)) == 0)
+ i = selfpc >> log_hashfraction;
+ else
+ i = selfpc / (hashfraction * sizeof (*tos));
+
+ topcindex = &tos[i];
+ fromindex = *topcindex;
+
+ if (fromindex == 0)
+ goto check_new_or_add;
+
+ fromp = &froms[fromindex];
+
+ /* We have to look through the chain of arcs whether there is already
+ an entry for our arc. */
+ while (fromp->here->from_pc == frompc)
+ {
+ if (fromp->link != 0)
+ do
+ fromp = &froms[fromp->link];
+ while (fromp->link != 0 && fromp->here->from_pc != frompc);
+
+ if (fromp->link == 0)
+ {
+ topcindex = &fromp->link;
+
+ check_new_or_add:
+ /* Our entry is not among the entries we read so far from the
+ data file. Now see whether we have to update the list. */
+ while (narcs != *narcsp)
+ {
+ size_t to_index;
+ size_t newfromidx;
+ to_index = ((data[narcs].self_pc - lowpc)
+ / (hashfraction * sizeof (*tos)));
+ newfromidx = fromidx++;
+ froms[newfromidx].here = &data[narcs];
+ froms[newfromidx].link = tos[to_index];
+ tos[to_index] = newfromidx;
+ ++narcs;
+ }
+
+ /* If we still have no entry stop searching and insert. */
+ if (*topcindex == 0)
+ {
+ fromidx = 1 + exchange_and_add (narcsp, 1);
+ ++narcs;
+
+ /* In rare cases it could happen that all entries in FROMS are
+ occupied. So we cannot count this anymore. */
+ if (fromidx >= fromlimit)
+ goto done;
+
+ *topcindex = fromindex;
+ fromp = &froms[fromindex];
+
+ fromp = &froms[fromp->link];
+
+ fromp->link = 0;
+ fromp->here->from_pc = frompc;
+ fromp->here->count = 0;
+
+ break;
+ }
+
+ fromp = &froms[*topcindex];
+ }
+ else
+ /* Found in. */
+ break;
+ }
+
+ /* Increment the counter. */
+ atomic_add (&fromp->here->count, 1);
done:
state = GMON_PROF_ON;