| mcount.c (50477) | mcount.c (55206) |
|---|---|
| 1/*- 2 * Copyright (c) 1983, 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 16 unchanged lines hidden (view full) --- 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * | 1/*- 2 * Copyright (c) 1983, 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 16 unchanged lines hidden (view full) --- 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * |
| 33 * $FreeBSD: head/sys/libkern/mcount.c 50477 1999-08-28 01:08:13Z peter $ | 33 * $FreeBSD: head/sys/libkern/mcount.c 55206 1999-12-29 05:07:58Z peter $ |
| 34 */ 35 36#include <sys/param.h> 37#include <sys/gmon.h> | 34 */ 35 36#include <sys/param.h> 37#include <sys/gmon.h> |
| 38#ifdef KERNEL | 38#ifdef _KERNEL |
| 39#ifndef GUPROF 40#include <sys/systm.h> 41#endif 42#include <vm/vm.h> 43#include <vm/vm_param.h> 44#include <vm/pmap.h> 45void bintr __P((void)); 46void btrap __P((void)); --- 22 unchanged lines hidden (view full) --- 69#ifdef GUPROF 70 int delta; 71#endif 72 register fptrdiff_t frompci; 73 register u_short *frompcindex; 74 register struct tostruct *top, *prevtop; 75 register struct gmonparam *p; 76 register long toindex; | 39#ifndef GUPROF 40#include <sys/systm.h> 41#endif 42#include <vm/vm.h> 43#include <vm/vm_param.h> 44#include <vm/pmap.h> 45void bintr __P((void)); 46void btrap __P((void)); --- 22 unchanged lines hidden (view full) --- 69#ifdef GUPROF 70 int delta; 71#endif 72 register fptrdiff_t frompci; 73 register u_short *frompcindex; 74 register struct tostruct *top, *prevtop; 75 register struct gmonparam *p; 76 register long toindex; |
| 77#ifdef KERNEL | 77#ifdef _KERNEL |
| 78 MCOUNT_DECL(s) 79#endif 80 81 p = &_gmonparam; 82#ifndef GUPROF /* XXX */ 83 /* 84 * check that we are profiling 85 * and that we aren't recursively invoked. 86 */ 87 if (p->state != GMON_PROF_ON) 88 return; 89#endif | 78 MCOUNT_DECL(s) 79#endif 80 81 p = &_gmonparam; 82#ifndef GUPROF /* XXX */ 83 /* 84 * check that we are profiling 85 * and that we aren't recursively invoked. 86 */ 87 if (p->state != GMON_PROF_ON) 88 return; 89#endif |
| 90#ifdef KERNEL | 90#ifdef _KERNEL |
| 91 MCOUNT_ENTER(s); 92#else 93 p->state = GMON_PROF_BUSY; 94#endif 95 frompci = frompc - p->lowpc; 96 | 91 MCOUNT_ENTER(s); 92#else 93 p->state = GMON_PROF_BUSY; 94#endif 95 frompci = frompc - p->lowpc; 96 |
| 97#ifdef KERNEL | 97#ifdef _KERNEL |
| 98 /* 99 * When we are called from an exception handler, frompci may be 100 * for a user address. Convert such frompci's to the index of 101 * user() to merge all user counts. 102 */ 103 if (frompci >= p->textsize) { 104 if (frompci + p->lowpc 105 >= (uintfptr_t)(VM_MAXUSER_ADDRESS + UPAGES * PAGE_SIZE)) 106 goto done; 107 frompci = (uintfptr_t)user - p->lowpc; 108 if (frompci >= p->textsize) 109 goto done; 110 } | 98 /* 99 * When we are called from an exception handler, frompci may be 100 * for a user address. Convert such frompci's to the index of 101 * user() to merge all user counts. 102 */ 103 if (frompci >= p->textsize) { 104 if (frompci + p->lowpc 105 >= (uintfptr_t)(VM_MAXUSER_ADDRESS + UPAGES * PAGE_SIZE)) 106 goto done; 107 frompci = (uintfptr_t)user - p->lowpc; 108 if (frompci >= p->textsize) 109 goto done; 110 } |
| 111#endif /* KERNEL */ | 111#endif |
| 112 113#ifdef GUPROF 114 if (p->state == GMON_PROF_HIRES) { 115 /* 116 * Count the time since cputime() was previously called 117 * against `frompc'. Compensate for overheads. 118 * 119 * cputime() sets its prev_count variable to the count when --- 15 unchanged lines hidden (view full) --- 135 delta = cputime() - cputime_bias - p->mcount_pre_overhead; 136 cputime_bias = p->mcount_post_overhead; 137 KCOUNT(p, frompci) += delta; 138 *p->cputime_count += p->cputime_overhead; 139 *p->mcount_count += p->mcount_overhead; 140 } 141#endif /* GUPROF */ 142 | 112 113#ifdef GUPROF 114 if (p->state == GMON_PROF_HIRES) { 115 /* 116 * Count the time since cputime() was previously called 117 * against `frompc'. Compensate for overheads. 118 * 119 * cputime() sets its prev_count variable to the count when --- 15 unchanged lines hidden (view full) --- 135 delta = cputime() - cputime_bias - p->mcount_pre_overhead; 136 cputime_bias = p->mcount_post_overhead; 137 KCOUNT(p, frompci) += delta; 138 *p->cputime_count += p->cputime_overhead; 139 *p->mcount_count += p->mcount_overhead; 140 } 141#endif /* GUPROF */ 142 |
| 143#ifdef KERNEL | 143#ifdef _KERNEL |
| 144 /* 145 * When we are called from an exception handler, frompc is faked 146 * to be for where the exception occurred. We've just solidified 147 * the count for there. Now convert frompci to the index of btrap() 148 * for trap handlers and bintr() for interrupt handlers to make 149 * exceptions appear in the call graph as calls from btrap() and 150 * bintr() instead of calls from all over. 151 */ 152 if ((uintfptr_t)selfpc >= (uintfptr_t)btrap 153 && (uintfptr_t)selfpc < (uintfptr_t)eintr) { 154 if ((uintfptr_t)selfpc >= (uintfptr_t)bintr) 155 frompci = (uintfptr_t)bintr - p->lowpc; 156 else 157 frompci = (uintfptr_t)btrap - p->lowpc; 158 } | 144 /* 145 * When we are called from an exception handler, frompc is faked 146 * to be for where the exception occurred. We've just solidified 147 * the count for there. Now convert frompci to the index of btrap() 148 * for trap handlers and bintr() for interrupt handlers to make 149 * exceptions appear in the call graph as calls from btrap() and 150 * bintr() instead of calls from all over. 151 */ 152 if ((uintfptr_t)selfpc >= (uintfptr_t)btrap 153 && (uintfptr_t)selfpc < (uintfptr_t)eintr) { 154 if ((uintfptr_t)selfpc >= (uintfptr_t)bintr) 155 frompci = (uintfptr_t)bintr - p->lowpc; 156 else 157 frompci = (uintfptr_t)btrap - p->lowpc; 158 } |
| 159#endif /* KERNEL */ | 159#endif |
| 160 161 /* 162 * check that frompc is a reasonable pc value. 163 * for example: signal catchers get called from the stack, 164 * not from text space. too bad. 165 */ 166 if (frompci >= p->textsize) 167 goto done; --- 65 unchanged lines hidden (view full) --- 233 prevtop->link = top->link; 234 top->link = *frompcindex; 235 *frompcindex = toindex; 236 goto done; 237 } 238 239 } 240done: | 160 161 /* 162 * check that frompc is a reasonable pc value. 163 * for example: signal catchers get called from the stack, 164 * not from text space. too bad. 165 */ 166 if (frompci >= p->textsize) 167 goto done; --- 65 unchanged lines hidden (view full) --- 233 prevtop->link = top->link; 234 top->link = *frompcindex; 235 *frompcindex = toindex; 236 goto done; 237 } 238 239 } 240done: |
| 241#ifdef KERNEL | 241#ifdef _KERNEL |
| 242 MCOUNT_EXIT(s); 243#else 244 p->state = GMON_PROF_ON; 245#endif 246 return; 247overflow: 248 p->state = GMON_PROF_ERROR; | 242 MCOUNT_EXIT(s); 243#else 244 p->state = GMON_PROF_ON; 245#endif 246 return; 247overflow: 248 p->state = GMON_PROF_ERROR; |
| 249#ifdef KERNEL | 249#ifdef _KERNEL |
| 250 MCOUNT_EXIT(s); 251#endif 252 return; 253} 254 255/* 256 * Actual definition of mcount function. Defined in <machine/profile.h>, 257 * which is included by <sys/gmon.h>. --- 51 unchanged lines hidden --- | 250 MCOUNT_EXIT(s); 251#endif 252 return; 253} 254 255/* 256 * Actual definition of mcount function. Defined in <machine/profile.h>, 257 * which is included by <sys/gmon.h>. --- 51 unchanged lines hidden --- |