osfmk/profiling/profile-mk.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  * Microkernel interface to common profiling.
  33  */
  34
  35 #include <profiling/profile-mk.h>
  36 #include <string.h>
  37 #include <kern/cpu_number.h>
  38 #include <kern/processor.h>
  39 #include <kern/spl.h>
  40 #include <kern/misc_protos.h>
  41 #include <vm/vm_kern.h>
  42 #include <mach/vm_param.h>
  43
  44 #include <device/ds_routines.h>
  45 #include <device/io_req.h>
  46 #include <device/buf.h>
  47
  48 extern char etext[], pstart[];
  49
  50 #if NCPUS > 1
  51 struct profile_vars *_profile_vars_cpus[NCPUS] = { &_profile_vars };
  52 struct profile_vars _profile_vars_aux[NCPUS-1];
  53 #endif
  54
  55 void *
  56 _profile_alloc_pages (size_t size)
  57 {
  58         vm_offset_t addr;
  59
  60         /*
  61          * For the MK, we can't support allocating pages at runtime, because we
  62          * might be at interrupt level, so abort if we didn't size the table
  63          * properly.
  64          */
  65
  66         if (PROFILE_VARS(0)->active) {
  67                 panic("Call to _profile_alloc_pages while profiling is running.");
  68         }
  69
  70         if (kmem_alloc(kernel_map, &addr, size)) {
  71                 panic("Could not allocate memory for profiling");
  72         }
  73
  74         memset((void *)addr, '\0', size);
  75         if (PROFILE_VARS(0)->debug) {
  76                 printf("Allocated %d bytes for profiling, address 0x%x\n", (int)size, (int)addr);
  77         }
  78
  79         return((caddr_t)addr);
  80 }
  81
  82 void
  83 _profile_free_pages(void *addr, size_t size)
  84 {
  85         if (PROFILE_VARS(0)->debug) {
  86                 printf("Freed %d bytes for profiling, address 0x%x\n", (int)size, (int)addr);
  87         }
  88
  89         kmem_free(kernel_map, (vm_offset_t)addr, size);
  90         return;
  91 }
  92
  93 void _profile_error(struct profile_vars *pv)
  94 {
  95         panic("Fatal error in profiling");
  96 }
  97
  98 void
  99 kmstartup(void)
 100 {
 101         prof_uptrint_t textsize;
 102         prof_uptrint_t monsize;
 103         prof_uptrint_t lowpc;
 104         prof_uptrint_t highpc;
 105         int i;
 106         struct profile_vars *pv;
 107
 108         /*
 109          * round lowpc and highpc to multiples of the density we're using
 110          * so the rest of the scaling (here and in gprof) stays in ints.
 111          */
 112
 113         lowpc = ROUNDDOWN((prof_uptrint_t)&pstart[0], HISTFRACTION*sizeof(LHISTCOUNTER));
 114         highpc = ROUNDUP((prof_uptrint_t)&etext[0], HISTFRACTION*sizeof(LHISTCOUNTER));
 115         textsize = highpc - lowpc;
 116         monsize = (textsize / HISTFRACTION) * sizeof(LHISTCOUNTER);
 117
 118         for (i = 0; i < NCPUS; i++) {
 119                 pv = PROFILE_VARS(i);
 120
 121 #if NCPUS > 1
 122                 if (!pv) {
 123                         _profile_vars_cpus[i] = pv = &_profile_vars_aux[i-i];
 124                 }
 125 #endif
 126
 127 #ifdef DEBUG_PROFILE
 128                 pv->debug = 1;
 129 #endif
 130                 pv->page_size = PAGE_SIZE;
 131                 _profile_md_init(pv, PROFILE_GPROF, PROFILE_ALLOC_MEM_YES);
 132
 133                 /* Profil related variables */
 134                 pv->profil_buf = _profile_alloc (pv, monsize, ACONTEXT_PROFIL);
 135                 pv->profil_info.highpc = highpc;
 136                 pv->profil_info.lowpc = lowpc;
 137                 pv->profil_info.text_len = textsize;
 138                 pv->profil_info.profil_len = monsize;
 139                 pv->profil_info.counter_size = sizeof(LHISTCOUNTER);
 140                 pv->profil_info.scale = 0x10000 / HISTFRACTION;
 141                 pv->stats.profil_buckets = monsize / sizeof(LHISTCOUNTER);
 142
 143                 /* Other gprof variables */
 144                 pv->stats.my_cpu = i;
 145                 pv->stats.max_cpu = NCPUS;
 146                 pv->init = 1;
 147                 pv->active = 1;
 148                 pv->use_dci = 0;
 149                 pv->use_profil = 1;
 150                 pv->check_funcs = 1;            /* for now */
 151
 152                 if (pv->debug) {
 153                         printf("Profiling kernel, s_textsize=%ld, monsize=%ld [0x%lx..0x%lx], cpu = %d\n",
 154                                (long)textsize,
 155                                (long)monsize,
 156                                (long)lowpc,
 157                                (long)highpc,
 158                                i);
 159                 }
 160         }
 161
 162         _profile_md_start();
 163 }
 164
 165 /* driver component */
 166
 167 int
 168 gprofprobe(caddr_t port, void *ctlr)
 169 {
 170         return(1);
 171 }
 172
 173 void
 174 gprofattach(void)
 175 {
 176         kmstartup();
 177         return;
 178 }
 179
 180 /* struct bus_device *gprofinfo[NGPROF]; */
 181 struct bus_device *gprofinfo[1];
 182
 183 struct  bus_driver      gprof_driver = {
 184         gprofprobe, 0, gprofattach, 0, 0, "gprof", gprofinfo, "gprofc", 0, 0};
 185
 186
 187 io_return_t
 188 gprofopen(dev_t dev,
 189           int flags,
 190           io_req_t ior)
 191 {
 192         ior->io_error = D_SUCCESS;
 193         return(0);
 194 }
 195
 196 void
 197 gprofclose(dev_t dev)
 198 {
 199         return;
 200 }
 201
 202 void
 203 gprofstrategy(io_req_t ior)
 204 {
 205         void *sys_ptr = (void *)0;
 206
 207         long count = _profile_kgmon(!(ior->io_op & IO_READ),
 208                                     ior->io_count,
 209                                     ior->io_recnum,
 210                                     NCPUS,
 211                                     &sys_ptr,
 212                                     (void (*)(kgmon_control_t))0);
 213
 214         if (count < 0) {
 215                 ior->io_error = D_INVALID_RECNUM;
 216
 217         } else {
 218                 if (count > 0 && sys_ptr != (void *)0) {
 219                         if (ior->io_op & IO_READ) {
 220                                 memcpy((void *)ior->io_data, sys_ptr, count);
 221                         } else {
 222                                 memcpy(sys_ptr, (void *)ior->io_data, count);
 223                         }
 224                 }
 225
 226                 ior->io_error = D_SUCCESS;
 227                 ior->io_residual = ior->io_count - count;
 228         }
 229
 230         iodone(ior);
 231 }
 232
 233 io_return_t
 234 gprofread(dev_t dev,
 235           io_req_t ior)
 236 {
 237         return(block_io(gprofstrategy, minphys, ior));
 238 }
 239
 240 io_return_t
 241 gprofwrite(dev_t dev,
 242            io_req_t ior)
 243 {
 244         return (block_io(gprofstrategy, minphys, ior));
 245 }