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gmon-sol2.c: Reindent.
* config/gmon-sol2.c: Reindent. Cleanup comments. Remove, correct casts. Use STDERR_FILENO, NULL. (BASEADDRESS): Remove. (minbrk): Remove. (errno, sbrk): Remove declarations. (monstartup) [hp300]: Remove. (mcount): Remove. From-SVN: r174531
This commit is contained in:
Rainer Orth
Rainer Orth
parent
ca24c5ad73
commit
a3fab9c2a9
@ -1,3 +1,15 @@
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2011-06-01 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
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* config/gmon-sol2.c: Reindent.
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Cleanup comments.
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Remove, correct casts.
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Use STDERR_FILENO, NULL.
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(BASEADDRESS): Remove.
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(minbrk): Remove.
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(errno, sbrk): Remove declarations.
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(monstartup) [hp300]: Remove.
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(mcount): Remove.
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2011-06-01 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
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* Makefile.in (cpu_type): Define.
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@ -28,45 +28,27 @@
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* SUCH DAMAGE.
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*/
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/* FIXME: Check comment. */
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/* Mangled into a form that works on SPARC Solaris 2 by Mark Eichin
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/* Mangled into a form that works on Solaris 2/SPARC by Mark Eichin
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* for Cygnus Support, July 1992.
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*
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* This is a modified gmon.c by J.W.Hawtin <oolon@ankh.org>,
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* 14/8/96 based on the original gmon.c in GCC and the hacked version
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* solaris 2 sparc version (config/sparc/gmon-sol.c) by Mark Eichin. To do
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* process profiling on solaris 2.X X86
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* Modified to support Solaris 2/x86 by J.W.Hawtin <oolon@ankh.org>, 14/8/96.
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*
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* It must be used in conjunction with sol2-gc1.asm, which is used to start
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* It must be used in conjunction with sol2-gc1.S, which is used to start
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* and stop process monitoring.
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*
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* Differences.
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*
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* On Solaris 2 _mcount is called by library functions not mcount, so support
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* has been added for both.
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*
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* Also the prototype for profil() is different
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*
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* Solaris 2 does not seem to have char *minbrk whcih allows the setting of
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* the minimum SBRK region so this code has been removed and lets pray malloc
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* does not mess it up.
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*
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* Notes
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*
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* This code could easily be integrated with the original gmon.c and perhaps
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* should be.
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*/
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#include "tconfig.h"
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#include "tsystem.h"
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#include <fcntl.h> /* for creat() */
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#include <fcntl.h> /* For creat. */
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#ifdef DEBUG
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#include <stdio.h>
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#endif
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static void moncontrol (int);
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extern void monstartup (char *, char *);
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extern void _mcleanup (void);
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#ifdef __i386__
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static void internal_mcount (void) __attribute__ ((used));
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#else
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static void internal_mcount (char *, unsigned short *) __attribute__ ((used));
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#endif
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static void moncontrol (int);
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struct phdr {
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char *lpc;
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@ -74,14 +56,11 @@ struct phdr {
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int ncnt;
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};
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#define HISTFRACTION 2
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#define HISTCOUNTER unsigned short
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#define HASHFRACTION 1
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#define ARCDENSITY 2
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#define MINARCS 50
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#define BASEADDRESS 0x8000000 /* On Solaris 2 X86 all executables start here
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and not at 0 */
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#define HISTFRACTION 2
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#define HISTCOUNTER unsigned short
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#define HASHFRACTION 1
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#define ARCDENSITY 2
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#define MINARCS 50
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struct tostruct {
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char *selfpc;
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@ -90,447 +69,376 @@ struct tostruct {
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};
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struct rawarc {
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unsigned long raw_frompc;
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unsigned long raw_selfpc;
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long raw_count;
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unsigned long raw_frompc;
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unsigned long raw_selfpc;
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long raw_count;
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};
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#define ROUNDDOWN(x,y) (((x)/(y))*(y))
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#define ROUNDUP(x,y) ((((x)+(y)-1)/(y))*(y))
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/* extern mcount() asm ("mcount"); */
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/*extern*/ char *minbrk /* asm ("minbrk") */;
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typedef __SIZE_TYPE__ size_t;
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typedef __PTRDIFF_TYPE__ intptr_t;
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#define ROUNDDOWN(x, y) (((x) / (y)) * (y))
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#define ROUNDUP(x, y) ((((x) + (y) - 1) / (y)) * (y))
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extern int errno;
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/* froms is actually a bunch of unsigned shorts indexing tos. */
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static int profiling = 3;
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static unsigned short *froms;
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static struct tostruct *tos = NULL;
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static long tolimit = 0;
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static char *s_lowpc = NULL;
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static char *s_highpc = NULL;
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static size_t s_textsize = 0;
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extern void *sbrk (intptr_t);
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/*
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* froms is actually a bunch of unsigned shorts indexing tos
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*/
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static int profiling = 3;
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static unsigned short *froms;
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static struct tostruct *tos = 0;
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static long tolimit = 0;
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static char *s_lowpc = 0;
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static char *s_highpc = 0;
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static size_t s_textsize = 0;
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static int ssiz;
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static char *sbuf;
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static int s_scale;
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/* see profil(2) where this is describe (incorrectly) */
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#define SCALE_1_TO_1 0x10000L
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static int ssiz;
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static char *sbuf;
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static int s_scale;
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/* See profil(2) where this is describe (incorrectly). */
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#define SCALE_1_TO_1 0x10000L
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#define MSG "No space for profiling buffer(s)\n"
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static void moncontrol (int);
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extern void monstartup (char *, char *);
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extern void _mcleanup (void);
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void monstartup(char *lowpc, char *highpc)
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void
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monstartup (char *lowpc, char *highpc)
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{
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size_t monsize;
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char *buffer;
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register size_t o;
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size_t monsize;
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char *buffer;
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size_t o;
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/*
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* round lowpc and highpc to multiples of the density we're using
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* so the rest of the scaling (here and in gprof) stays in ints.
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*/
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lowpc = (char *)
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ROUNDDOWN((size_t)lowpc, HISTFRACTION*sizeof(HISTCOUNTER));
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s_lowpc = lowpc;
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highpc = (char *)
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ROUNDUP((size_t)highpc, HISTFRACTION*sizeof(HISTCOUNTER));
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s_highpc = highpc;
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s_textsize = highpc - lowpc;
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monsize = (s_textsize / HISTFRACTION) + sizeof(struct phdr);
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buffer = (char *) sbrk( monsize );
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if ( buffer == (char *) -1 ) {
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write( 2 , MSG , sizeof(MSG) );
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return;
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}
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froms = (unsigned short *) sbrk( s_textsize / HASHFRACTION );
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if ( froms == (unsigned short *) -1 ) {
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write( 2 , MSG , sizeof(MSG) );
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froms = 0;
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return;
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}
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tolimit = s_textsize * ARCDENSITY / 100;
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if ( tolimit < MINARCS ) {
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tolimit = MINARCS;
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} else if ( tolimit > 65534 ) {
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tolimit = 65534;
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}
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tos = (struct tostruct *) sbrk( tolimit * sizeof( struct tostruct ) );
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if ( tos == (struct tostruct *) -1 ) {
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write( 2 , MSG , sizeof(MSG) );
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froms = 0;
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tos = 0;
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return;
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}
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minbrk = sbrk(0);
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tos[0].link = 0;
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sbuf = buffer;
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ssiz = monsize;
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( (struct phdr *) buffer ) -> lpc = lowpc;
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( (struct phdr *) buffer ) -> hpc = highpc;
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( (struct phdr *) buffer ) -> ncnt = ssiz;
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monsize -= sizeof(struct phdr);
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if ( monsize <= 0 )
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return;
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o = highpc - lowpc;
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if( monsize < o )
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#ifndef hp300
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s_scale = ( (float) monsize / o ) * SCALE_1_TO_1;
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#else /* avoid floating point */
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{
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int quot = o / monsize;
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if (quot >= 0x10000)
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s_scale = 1;
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else if (quot >= 0x100)
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s_scale = 0x10000 / quot;
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else if (o >= 0x800000)
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s_scale = 0x1000000 / (o / (monsize >> 8));
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else
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s_scale = 0x1000000 / ((o << 8) / monsize);
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}
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#endif
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else
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s_scale = SCALE_1_TO_1;
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moncontrol(1);
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/* Round lowpc and highpc to multiples of the density we're using
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so the rest of the scaling (here and in gprof) stays in ints. */
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lowpc = (char *) ROUNDDOWN ((size_t) lowpc,
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HISTFRACTION * sizeof (HISTCOUNTER));
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s_lowpc = lowpc;
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highpc = (char *) ROUNDUP ((size_t) highpc,
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HISTFRACTION * sizeof (HISTCOUNTER));
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s_highpc = highpc;
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s_textsize = highpc - lowpc;
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monsize = (s_textsize / HISTFRACTION) + sizeof (struct phdr);
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buffer = sbrk (monsize);
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if (buffer == (void *) -1) {
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write (STDERR_FILENO, MSG, sizeof (MSG));
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return;
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}
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froms = sbrk (s_textsize / HASHFRACTION);
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if (froms == (void *) -1) {
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write (STDERR_FILENO, MSG, sizeof (MSG));
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froms = NULL;
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return;
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}
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tolimit = s_textsize * ARCDENSITY / 100;
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if (tolimit < MINARCS) {
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tolimit = MINARCS;
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} else if (tolimit > 65534) {
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tolimit = 65534;
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}
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tos = sbrk (tolimit * sizeof (struct tostruct));
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if (tos == (void *) -1) {
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write (STDERR_FILENO, MSG, sizeof (MSG));
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froms = NULL;
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tos = NULL;
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return;
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}
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tos[0].link = 0;
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sbuf = buffer;
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ssiz = monsize;
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((struct phdr *) buffer)->lpc = lowpc;
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((struct phdr *) buffer)->hpc = highpc;
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((struct phdr *) buffer)->ncnt = ssiz;
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monsize -= sizeof (struct phdr);
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if (monsize <= 0)
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return;
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o = highpc - lowpc;
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if(monsize < o)
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s_scale = ((float) monsize / o) * SCALE_1_TO_1;
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else
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s_scale = SCALE_1_TO_1;
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moncontrol (1);
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}
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void
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_mcleanup(void)
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_mcleanup (void)
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{
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int fd;
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int fromindex;
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int endfrom;
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char *frompc;
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int toindex;
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struct rawarc rawarc;
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char *profdir;
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const char *proffile;
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char *progname;
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char buf[PATH_MAX];
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extern char **___Argv;
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int fd;
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int fromindex;
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int endfrom;
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char *frompc;
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int toindex;
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struct rawarc rawarc;
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char *profdir;
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const char *proffile;
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char *progname;
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char buf[PATH_MAX];
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extern char **___Argv;
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moncontrol(0);
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moncontrol (0);
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if ((profdir = getenv("PROFDIR")) != NULL) {
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/* If PROFDIR contains a null value, no profiling output is produced */
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if (*profdir == '\0') {
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return;
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}
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progname=strrchr(___Argv[0], '/');
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if (progname == NULL)
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progname=___Argv[0];
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else
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progname++;
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sprintf(buf, "%s/%ld.%s", profdir, (long) getpid(), progname);
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proffile = buf;
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} else {
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proffile = "gmon.out";
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if ((profdir = getenv ("PROFDIR")) != NULL) {
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/* If PROFDIR contains a null value, no profiling output is produced. */
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if (*profdir == '\0') {
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return;
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}
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fd = creat( proffile, 0666 );
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if ( fd < 0 ) {
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perror( proffile );
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return;
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}
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# ifdef DEBUG
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fprintf( stderr , "[mcleanup] sbuf %#x ssiz %d\n" , sbuf , ssiz );
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# endif /* DEBUG */
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progname = strrchr (___Argv[0], '/');
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if (progname == NULL)
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progname = ___Argv[0];
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else
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progname++;
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write( fd , sbuf , ssiz );
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endfrom = s_textsize / (HASHFRACTION * sizeof(*froms));
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for ( fromindex = 0 ; fromindex < endfrom ; fromindex++ ) {
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if ( froms[fromindex] == 0 ) {
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continue;
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}
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frompc = s_lowpc + (fromindex * HASHFRACTION * sizeof(*froms));
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for (toindex=froms[fromindex]; toindex!=0; toindex=tos[toindex].link) {
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# ifdef DEBUG
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fprintf( stderr ,
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"[mcleanup] frompc %#x selfpc %#x count %d\n" ,
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frompc , tos[toindex].selfpc , tos[toindex].count );
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# endif /* DEBUG */
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rawarc.raw_frompc = (unsigned long) frompc;
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rawarc.raw_selfpc = (unsigned long) tos[toindex].selfpc;
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rawarc.raw_count = tos[toindex].count;
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write( fd , &rawarc , sizeof rawarc );
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}
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sprintf (buf, "%s/%ld.%s", profdir, (long) getpid (), progname);
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proffile = buf;
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} else {
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proffile = "gmon.out";
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}
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fd = creat (proffile, 0666);
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if (fd < 0) {
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perror (proffile);
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return;
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}
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#ifdef DEBUG
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fprintf (stderr, "[mcleanup] sbuf %#x ssiz %d\n", sbuf, ssiz);
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#endif /* DEBUG */
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write (fd, sbuf, ssiz);
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endfrom = s_textsize / (HASHFRACTION * sizeof (*froms));
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for (fromindex = 0; fromindex < endfrom; fromindex++) {
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if (froms[fromindex] == 0) {
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continue;
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}
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close( fd );
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frompc = s_lowpc + (fromindex * HASHFRACTION * sizeof (*froms));
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for (toindex = froms[fromindex];
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toindex != 0;
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toindex = tos[toindex].link) {
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#ifdef DEBUG
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fprintf (stderr, "[mcleanup] frompc %#x selfpc %#x count %d\n",
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frompc, tos[toindex].selfpc, tos[toindex].count);
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#endif /* DEBUG */
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rawarc.raw_frompc = (unsigned long) frompc;
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rawarc.raw_selfpc = (unsigned long) tos[toindex].selfpc;
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rawarc.raw_count = tos[toindex].count;
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write (fd, &rawarc, sizeof (rawarc));
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}
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}
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close (fd);
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}
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#ifdef __sparc__
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/*
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* The SPARC stack frame is only held together by the frame pointers
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* in the register windows. According to the SVR4 SPARC ABI
|
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* Supplement, Low Level System Information/Operating System
|
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* Interface/Software Trap Types, a type 3 trap will flush all of the
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* register windows to the stack, which will make it possible to walk
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* the frames and find the return addresses.
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* However, it seems awfully expensive to incur a trap (system
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* call) for every function call. It turns out that "call" simply puts
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* the return address in %o7 expecting the "save" in the procedure to
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* shift it into %i7; this means that before the "save" occurs, %o7
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* contains the address of the call to mcount, and %i7 still contains
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* the caller above that. The asm mcount here simply saves those
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* registers in argument registers and branches to internal_mcount,
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* simulating a call with arguments.
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* Kludges:
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* 1) the branch to internal_mcount is hard coded; it should be
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* possible to tell asm to use the assembler-name of a symbol.
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* 2) in theory, the function calling mcount could have saved %i7
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* somewhere and reused the register; in practice, I *think* this will
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* break longjmp (and maybe the debugger) but I'm not certain. (I take
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* some comfort in the knowledge that it will break the native mcount
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* as well.)
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* 3) if builtin_return_address worked, this could be portable.
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* However, it would really have to be optimized for arguments of 0
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* and 1 and do something like what we have here in order to avoid the
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* trap per function call performance hit.
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* 4) the atexit and monsetup calls prevent this from simply
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* being a leaf routine that doesn't do a "save" (and would thus have
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* access to %o7 and %i7 directly) but the call to write() at the end
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* would have also prevented this.
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*
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* -- [eichin:19920702.1107EST]
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*/
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static void internal_mcount (char *, unsigned short *) __attribute__ ((used));
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/* i7 == last ret, -> frompcindex */
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/* o7 == current ret, -> selfpc */
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/* Solaris 2 libraries use _mcount. */
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asm(".global _mcount; _mcount: mov %i7,%o1; mov %o7,%o0;b,a internal_mcount");
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/* This is for compatibility with old versions of gcc which used mcount. */
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asm(".global mcount; mcount: mov %i7,%o1; mov %o7,%o0;b,a internal_mcount");
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#if defined __i386__
|
||||
asm(".globl _mcount\n"
|
||||
"_mcount:\n"
|
||||
" jmp internal_mcount\n");
|
||||
#elif defined __x86_64__
|
||||
extern void internal_mcount (char *, unsigned short *);
|
||||
|
||||
/* See GLIBC for additional information about this technique. */
|
||||
asm(".globl _mcount\n"
|
||||
"\t.type\t_mcount, @function\n"
|
||||
" .type _mcount, @function\n"
|
||||
"_mcount:\n"
|
||||
/* The compiler calls _mcount after the prologue, and does not
|
||||
save any of the registers. Therefore we must preserve all
|
||||
seven registers which may contain function arguments. */
|
||||
"\tsubq\t$0x38,%rsp\n"
|
||||
"\tmovq\t%rax,(%rsp)\n"
|
||||
"\tmovq\t%rcx,0x08(%rsp)\n"
|
||||
"\tmovq\t%rdx,0x10(%rsp)\n"
|
||||
"\tmovq\t%rsi,0x18(%rsp)\n"
|
||||
"\tmovq\t%rdi,0x20(%rsp)\n"
|
||||
"\tmovq\t%r8,0x28(%rsp)\n"
|
||||
"\tmovq\t%r9,0x30(%rsp)\n"
|
||||
" subq $0x38, %rsp\n"
|
||||
" movq %rax, (%rsp)\n"
|
||||
" movq %rcx, 0x08(%rsp)\n"
|
||||
" movq %rdx, 0x10(%rsp)\n"
|
||||
" movq %rsi, 0x18(%rsp)\n"
|
||||
" movq %rdi, 0x20(%rsp)\n"
|
||||
" movq %r8, 0x28(%rsp)\n"
|
||||
" movq %r9, 0x30(%rsp)\n"
|
||||
/* Get SELFPC (pushed by the call to this function) and
|
||||
FROMPCINDEX (via the frame pointer. */
|
||||
"\tmovq\t0x38(%rsp),%rdi\n"
|
||||
"\tmovq\t0x8(%rbp),%rsi\n"
|
||||
"\tcall\tinternal_mcount\n"
|
||||
FROMPCINDEX (via the frame pointer). */
|
||||
" movq 0x38(%rsp), %rdi\n"
|
||||
" movq 0x8(%rbp), %rsi\n"
|
||||
" call internal_mcount\n"
|
||||
/* Restore the saved registers. */
|
||||
"\tmovq\t0x30(%rsp),%r9\n"
|
||||
"\tmovq\t0x28(%rsp),%r8\n"
|
||||
"\tmovq\t0x20(%rsp),%rdi\n"
|
||||
"\tmovq\t0x18(%rsp),%rsi\n"
|
||||
"\tmovq\t0x10(%rsp),%rdx\n"
|
||||
"\tmovq\t0x08(%rsp),%rcx\n"
|
||||
"\tmovq\t(%rsp),%rax\n"
|
||||
"\taddq\t$0x38,%rsp\n"
|
||||
"\tretq\n"
|
||||
);
|
||||
#else
|
||||
extern void internal_mcount (void);
|
||||
" movq 0x30(%rsp), %r9\n"
|
||||
" movq 0x28(%rsp), %r8\n"
|
||||
" movq 0x20(%rsp), %rdi\n"
|
||||
" movq 0x18(%rsp), %rsi\n"
|
||||
" movq 0x10(%rsp), %rdx\n"
|
||||
" movq 0x08(%rsp), %rcx\n"
|
||||
" movq (%rsp), %rax\n"
|
||||
" addq $0x38, %rsp\n"
|
||||
" retq\n");
|
||||
#elif defined __sparc__
|
||||
/* The SPARC stack frame is only held together by the frame pointers
|
||||
in the register windows. According to the SVR4 SPARC ABI
|
||||
Supplement, Low Level System Information/Operating System
|
||||
Interface/Software Trap Types, a type 3 trap will flush all of the
|
||||
register windows to the stack, which will make it possible to walk
|
||||
the frames and find the return addresses.
|
||||
However, it seems awfully expensive to incur a trap (system
|
||||
call) for every function call. It turns out that "call" simply puts
|
||||
the return address in %o7 expecting the "save" in the procedure to
|
||||
shift it into %i7; this means that before the "save" occurs, %o7
|
||||
contains the address of the call to mcount, and %i7 still contains
|
||||
the caller above that. The asm mcount here simply saves those
|
||||
registers in argument registers and branches to internal_mcount,
|
||||
simulating a call with arguments.
|
||||
Kludges:
|
||||
1) the branch to internal_mcount is hard coded; it should be
|
||||
possible to tell asm to use the assembler-name of a symbol.
|
||||
2) in theory, the function calling mcount could have saved %i7
|
||||
somewhere and reused the register; in practice, I *think* this will
|
||||
break longjmp (and maybe the debugger) but I'm not certain. (I take
|
||||
some comfort in the knowledge that it will break the native mcount
|
||||
as well.)
|
||||
3) if builtin_return_address worked, this could be portable.
|
||||
However, it would really have to be optimized for arguments of 0
|
||||
and 1 and do something like what we have here in order to avoid the
|
||||
trap per function call performance hit.
|
||||
4) the atexit and monsetup calls prevent this from simply
|
||||
being a leaf routine that doesn't do a "save" (and would thus have
|
||||
access to %o7 and %i7 directly) but the call to write() at the end
|
||||
would have also prevented this.
|
||||
|
||||
/* Solaris 2 libraries use _mcount. */
|
||||
asm(".globl _mcount; _mcount: jmp internal_mcount");
|
||||
/* This is for compatibility with old versions of gcc which used mcount. */
|
||||
asm(".globl mcount; mcount: jmp internal_mcount");
|
||||
-- [eichin:19920702.1107EST] */
|
||||
asm(".global _mcount\n"
|
||||
"_mcount:\n"
|
||||
/* i7 == last ret, -> frompcindex. */
|
||||
" mov %i7, %o1\n"
|
||||
/* o7 == current ret, -> selfpc. */
|
||||
" mov %o7, %o0\n"
|
||||
" b,a internal_mcount\n");
|
||||
#endif
|
||||
|
||||
#ifdef __sparc__
|
||||
static
|
||||
#endif
|
||||
void
|
||||
internal_mcount (
|
||||
#if defined __sparc__ || defined __x86_64__
|
||||
char *selfpc,
|
||||
unsigned short *frompcindex
|
||||
static void
|
||||
#ifdef __i386__
|
||||
internal_mcount (void)
|
||||
#else
|
||||
void
|
||||
internal_mcount (char *selfpc, unsigned short *frompcindex)
|
||||
#endif
|
||||
)
|
||||
{
|
||||
#if !defined __sparc__ && !defined __x86_64__
|
||||
register char *selfpc;
|
||||
register unsigned short *frompcindex;
|
||||
#endif
|
||||
register struct tostruct *top;
|
||||
register struct tostruct *prevtop;
|
||||
register long toindex;
|
||||
static char already_setup;
|
||||
struct tostruct *top;
|
||||
struct tostruct *prevtop;
|
||||
long toindex;
|
||||
static char already_setup;
|
||||
|
||||
#if !defined __sparc__ && !defined __x86_64__
|
||||
/*
|
||||
* find the return address for mcount,
|
||||
* and the return address for mcount's caller.
|
||||
*/
|
||||
#ifdef __i386__
|
||||
char *selfpc;
|
||||
unsigned short *frompcindex;
|
||||
|
||||
/* selfpc = pc pushed by mcount call.
|
||||
This identifies the function that was just entered. */
|
||||
selfpc = (void *) __builtin_return_address (0);
|
||||
/* frompcindex = pc in preceding frame.
|
||||
This identifies the caller of the function just entered. */
|
||||
frompcindex = (void *) __builtin_return_address (1);
|
||||
/* Find the return address for mcount and the return address for mcount's
|
||||
caller. */
|
||||
|
||||
/* selfpc = pc pushed by mcount call.
|
||||
This identifies the function that was just entered. */
|
||||
selfpc = (void *) __builtin_return_address (0);
|
||||
/* frompcindex = pc in preceding frame.
|
||||
This identifies the caller of the function just entered. */
|
||||
frompcindex = (void *) __builtin_return_address (1);
|
||||
#endif
|
||||
|
||||
if(!already_setup) {
|
||||
extern char etext[];
|
||||
#ifdef __sparc__
|
||||
extern char _start[];
|
||||
extern char _init[];
|
||||
#endif
|
||||
already_setup = 1;
|
||||
#if defined __sparc__
|
||||
monstartup(_start < _init ? _start : _init, etext);
|
||||
if(!already_setup) {
|
||||
extern char etext[];
|
||||
|
||||
already_setup = 1;
|
||||
|
||||
#if defined __i386__
|
||||
/* <sys/vmparam.h> USERSTACK. */
|
||||
monstartup ((char *) 0x8048000, etext);
|
||||
#elif defined __x86_64__
|
||||
monstartup(0, etext);
|
||||
#else
|
||||
monstartup((char*)0x08040000, etext);
|
||||
#endif
|
||||
#ifdef USE_ONEXIT
|
||||
on_exit(_mcleanup, 0);
|
||||
#else
|
||||
atexit(_mcleanup);
|
||||
#endif
|
||||
}
|
||||
/*
|
||||
* check that we are profiling
|
||||
* and that we aren't recursively invoked.
|
||||
*/
|
||||
if (profiling) {
|
||||
goto out;
|
||||
}
|
||||
profiling++;
|
||||
/*
|
||||
* check that frompcindex is a reasonable pc value.
|
||||
* for example: signal catchers get called from the stack,
|
||||
* not from text space. too bad.
|
||||
*/
|
||||
frompcindex = (unsigned short *)((long)frompcindex - (long)s_lowpc);
|
||||
if ((unsigned long)frompcindex > s_textsize) {
|
||||
goto done;
|
||||
}
|
||||
frompcindex =
|
||||
&froms[((long)frompcindex) / (HASHFRACTION * sizeof(*froms))];
|
||||
toindex = *frompcindex;
|
||||
if (toindex == 0) {
|
||||
/*
|
||||
* first time traversing this arc
|
||||
*/
|
||||
toindex = ++tos[0].link;
|
||||
if (toindex >= tolimit) {
|
||||
goto overflow;
|
||||
}
|
||||
*frompcindex = toindex;
|
||||
top = &tos[toindex];
|
||||
top->selfpc = selfpc;
|
||||
top->count = 1;
|
||||
top->link = 0;
|
||||
goto done;
|
||||
}
|
||||
top = &tos[toindex];
|
||||
if (top->selfpc == selfpc) {
|
||||
/*
|
||||
* arc at front of chain; usual case.
|
||||
*/
|
||||
top->count++;
|
||||
goto done;
|
||||
}
|
||||
/*
|
||||
* have to go looking down chain for it.
|
||||
* top points to what we are looking at,
|
||||
* prevtop points to previous top.
|
||||
* we know it is not at the head of the chain.
|
||||
*/
|
||||
for (; /* goto done */; ) {
|
||||
if (top->link == 0) {
|
||||
/*
|
||||
* top is end of the chain and none of the chain
|
||||
* had top->selfpc == selfpc.
|
||||
* so we allocate a new tostruct
|
||||
* and link it to the head of the chain.
|
||||
*/
|
||||
toindex = ++tos[0].link;
|
||||
if (toindex >= tolimit) {
|
||||
goto overflow;
|
||||
}
|
||||
top = &tos[toindex];
|
||||
top->selfpc = selfpc;
|
||||
top->count = 1;
|
||||
top->link = *frompcindex;
|
||||
*frompcindex = toindex;
|
||||
goto done;
|
||||
}
|
||||
/*
|
||||
* otherwise, check the next arc on the chain.
|
||||
*/
|
||||
prevtop = top;
|
||||
top = &tos[top->link];
|
||||
if (top->selfpc == selfpc) {
|
||||
/*
|
||||
* there it is.
|
||||
* increment its count
|
||||
* move it to the head of the chain.
|
||||
*/
|
||||
top->count++;
|
||||
toindex = prevtop->link;
|
||||
prevtop->link = top->link;
|
||||
top->link = *frompcindex;
|
||||
*frompcindex = toindex;
|
||||
goto done;
|
||||
}
|
||||
monstartup (NULL, etext);
|
||||
#elif defined __sparc__
|
||||
{
|
||||
extern char _start[];
|
||||
extern char _init[];
|
||||
|
||||
}
|
||||
done:
|
||||
profiling--;
|
||||
/* and fall through */
|
||||
out:
|
||||
return; /* normal return restores saved registers */
|
||||
|
||||
overflow:
|
||||
profiling++; /* halt further profiling */
|
||||
# define TOLIMIT "mcount: tos overflow\n"
|
||||
write(2, TOLIMIT, sizeof(TOLIMIT));
|
||||
goto out;
|
||||
}
|
||||
|
||||
/*
|
||||
* Control profiling
|
||||
* profiling is what mcount checks to see if
|
||||
* all the data structures are ready.
|
||||
*/
|
||||
static void moncontrol(int mode)
|
||||
{
|
||||
if (mode) {
|
||||
/* start */
|
||||
profil((unsigned short *)(sbuf + sizeof(struct phdr)),
|
||||
ssiz - sizeof(struct phdr),
|
||||
(size_t)s_lowpc, s_scale);
|
||||
|
||||
profiling = 0;
|
||||
} else {
|
||||
/* stop */
|
||||
profil((unsigned short *)0, 0, 0, 0);
|
||||
profiling = 3;
|
||||
monstartup (_start < _init ? _start : _init, etext);
|
||||
}
|
||||
#endif
|
||||
atexit (_mcleanup);
|
||||
}
|
||||
/* Check that we are profiling and that we aren't recursively invoked. */
|
||||
if (profiling) {
|
||||
goto out;
|
||||
}
|
||||
profiling++;
|
||||
/* Check that frompcindex is a reasonable pc value. For example: signal
|
||||
catchers get called from the stack, not from text space. too bad. */
|
||||
frompcindex = (unsigned short *) ((long) frompcindex - (long) s_lowpc);
|
||||
if ((unsigned long) frompcindex > s_textsize) {
|
||||
goto done;
|
||||
}
|
||||
frompcindex = &froms[((long) frompcindex) / (HASHFRACTION * sizeof (*froms))];
|
||||
toindex = *frompcindex;
|
||||
if (toindex == 0) {
|
||||
/* First time traversing this arc. */
|
||||
toindex = ++tos[0].link;
|
||||
if (toindex >= tolimit) {
|
||||
goto overflow;
|
||||
}
|
||||
*frompcindex = toindex;
|
||||
top = &tos[toindex];
|
||||
top->selfpc = selfpc;
|
||||
top->count = 1;
|
||||
top->link = 0;
|
||||
goto done;
|
||||
}
|
||||
top = &tos[toindex];
|
||||
if (top->selfpc == selfpc) {
|
||||
/* arc at front of chain; usual case. */
|
||||
top->count++;
|
||||
goto done;
|
||||
}
|
||||
/* Have to go looking down chain for it. Top points to what we are
|
||||
looking at, prevtop points to previous top. We know it is not at the
|
||||
head of the chain. */
|
||||
for (; /* goto done */; ) {
|
||||
if (top->link == 0) {
|
||||
/* top is end of the chain and none of the chain had top->selfpc ==
|
||||
selfpc, so we allocate a new tostruct and link it to the head of
|
||||
the chain. */
|
||||
toindex = ++tos[0].link;
|
||||
if (toindex >= tolimit) {
|
||||
goto overflow;
|
||||
}
|
||||
top = &tos[toindex];
|
||||
top->selfpc = selfpc;
|
||||
top->count = 1;
|
||||
top->link = *frompcindex;
|
||||
*frompcindex = toindex;
|
||||
goto done;
|
||||
}
|
||||
/* Otherwise, check the next arc on the chain. */
|
||||
prevtop = top;
|
||||
top = &tos[top->link];
|
||||
if (top->selfpc == selfpc) {
|
||||
/* There it is. Increment its count move it to the head of the
|
||||
chain. */
|
||||
top->count++;
|
||||
toindex = prevtop->link;
|
||||
prevtop->link = top->link;
|
||||
top->link = *frompcindex;
|
||||
*frompcindex = toindex;
|
||||
goto done;
|
||||
}
|
||||
|
||||
}
|
||||
done:
|
||||
profiling--;
|
||||
/* ... and fall through. */
|
||||
out:
|
||||
/* Normal return restores saved registers. */
|
||||
return;
|
||||
|
||||
overflow:
|
||||
/* Halt further profiling. */
|
||||
profiling++;
|
||||
|
||||
#define TOLIMIT "mcount: tos overflow\n"
|
||||
write (STDERR_FILENO, TOLIMIT, sizeof (TOLIMIT));
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Control profiling. Profiling is what mcount checks to see if all the
|
||||
data structures are ready. */
|
||||
static void
|
||||
moncontrol (int mode)
|
||||
{
|
||||
if (mode) {
|
||||
/* Start. */
|
||||
profil ((unsigned short *) (sbuf + sizeof (struct phdr)),
|
||||
ssiz - sizeof (struct phdr), (size_t) s_lowpc, s_scale);
|
||||
profiling = 0;
|
||||
} else {
|
||||
/* Stop. */
|
||||
profil ((unsigned short *) 0, 0, 0, 0);
|
||||
profiling = 3;
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user