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 void *
  51 _profile_alloc_pages(size_t size)
  52 {
  53         vm_offset_t addr;
  54
  55         /*
  56          * For the MK, we can't support allocating pages at runtime, because we
  57          * might be at interrupt level, so abort if we didn't size the table
  58          * properly.
  59          */
  60
  61         if (PROFILE_VARS(0)->active) {
  62                 panic("Call to _profile_alloc_pages while profiling is running.");
  63         }
  64
  65         if (kmem_alloc(kernel_map, &addr, size)) {
  66                 panic("Could not allocate memory for profiling");
  67         }
  68
  69         memset((void *)addr, '\0', size);
  70         if (PROFILE_VARS(0)->debug) {
  71                 printf("Allocated %d bytes for profiling, address 0x%x\n", (int)size, (int)addr);
  72         }
  73
  74         return (caddr_t)addr;
  75 }
  76
  77 void
  78 _profile_free_pages(void *addr, size_t size)
  79 {
  80         if (PROFILE_VARS(0)->debug) {
  81                 printf("Freed %d bytes for profiling, address 0x%x\n", (int)size, (int)addr);
  82         }
  83
  84         kmem_free(kernel_map, (vm_offset_t)addr, size);
  85         return;
  86 }
  87
  88 void
  89 _profile_error(struct profile_vars *pv)
  90 {
  91         panic("Fatal error in profiling");
  92 }
  93
  94 void
  95 kmstartup(void)
  96 {
  97         prof_uptrint_t textsize;
  98         prof_uptrint_t monsize;
  99         prof_uptrint_t lowpc;
 100         prof_uptrint_t highpc;
 101         struct profile_vars *pv;
 102
 103         /*
 104          * round lowpc and highpc to multiples of the density we're using
 105          * so the rest of the scaling (here and in gprof) stays in ints.
 106          */
 107
 108         lowpc = ROUNDDOWN((prof_uptrint_t)&pstart[0], HISTFRACTION * sizeof(LHISTCOUNTER));
 109         highpc = ROUNDUP((prof_uptrint_t)&etext[0], HISTFRACTION * sizeof(LHISTCOUNTER));
 110         textsize = highpc - lowpc;
 111         monsize = (textsize / HISTFRACTION) * sizeof(LHISTCOUNTER);
 112
 113         pv = PROFILE_VARS(0);
 114
 115 #ifdef DEBUG_PROFILE
 116         pv->debug = 1;
 117 #endif
 118         pv->page_size = PAGE_SIZE;
 119         _profile_md_init(pv, PROFILE_GPROF, PROFILE_ALLOC_MEM_YES);
 120
 121         /* Profil related variables */
 122         pv->profil_buf = _profile_alloc(pv, monsize, ACONTEXT_PROFIL);
 123         pv->profil_info.highpc = highpc;
 124         pv->profil_info.lowpc = lowpc;
 125         pv->profil_info.text_len = textsize;
 126         pv->profil_info.profil_len = monsize;
 127         pv->profil_info.counter_size = sizeof(LHISTCOUNTER);
 128         pv->profil_info.scale = 0x10000 / HISTFRACTION;
 129         pv->stats.profil_buckets = monsize / sizeof(LHISTCOUNTER);
 130
 131         /* Other gprof variables */
 132         pv->stats.my_cpu = 0;
 133         pv->stats.max_cpu = 1;  /* initial number of cpus */
 134         pv->init = 1;
 135         pv->active = 1;
 136         pv->use_dci = 0;
 137         pv->use_profil = 1;
 138         pv->check_funcs = 1;            /* for now */
 139
 140         if (pv->debug) {
 141                 printf("Profiling kernel, s_textsize=%ld, monsize=%ld [0x%lx..0x%lx], cpu = %d\n",
 142                     (long)textsize,
 143                     (long)monsize,
 144                     (long)lowpc,
 145                     (long)highpc,
 146                     0);
 147         }
 148
 149         _profile_md_start();
 150 }
 151
 152 /* driver component */
 153
 154 int
 155 gprofprobe(caddr_t port, void *ctlr)
 156 {
 157         return 1;
 158 }
 159
 160 void
 161 gprofattach(void)
 162 {
 163         kmstartup();
 164         return;
 165 }
 166
 167 /* struct bus_device *gprofinfo[NGPROF]; */
 168 struct bus_device *gprofinfo[1];
 169
 170 struct  bus_driver      gprof_driver = {
 171         gprofprobe, 0, gprofattach, 0, 0, "gprof", gprofinfo, "gprofc", 0, 0
 172 };
 173
 174
 175 io_return_t
 176 gprofopen(dev_t dev,
 177     int flags,
 178     io_req_t ior)
 179 {
 180         ior->io_error = D_SUCCESS;
 181         return 0;
 182 }
 183
 184 void
 185 gprofclose(dev_t dev)
 186 {
 187         return;
 188 }
 189
 190 void
 191 gprofstrategy(io_req_t ior)
 192 {
 193         void *sys_ptr = (void *)0;
 194
 195         long count = _profile_kgmon(!(ior->io_op & IO_READ),
 196             ior->io_count,
 197             ior->io_recnum,
 198             1,
 199             &sys_ptr,
 200             (void (*)(kgmon_control_t))0);
 201
 202         if (count < 0) {
 203                 ior->io_error = D_INVALID_RECNUM;
 204         } else {
 205                 if (count > 0 && sys_ptr != (void *)0) {
 206                         if (ior->io_op & IO_READ) {
 207                                 memcpy((void *)ior->io_data, sys_ptr, count);
 208                         } else {
 209                                 memcpy(sys_ptr, (void *)ior->io_data, count);
 210                         }
 211                 }
 212
 213                 ior->io_error = D_SUCCESS;
 214                 ior->io_residual = ior->io_count - count;
 215         }
 216
 217         iodone(ior);
 218 }
 219
 220 io_return_t
 221 gprofread(dev_t dev,
 222     io_req_t ior)
 223 {
 224         return block_io(gprofstrategy, minphys, ior);
 225 }
 226
 227 io_return_t
 228 gprofwrite(dev_t dev,
 229     io_req_t ior)
 230 {
 231         return block_io(gprofstrategy, minphys, ior);
 232 }