1/* 2 * Copyright (c) 1999, 2003, 2004, 2007, 2008 Apple Inc. All rights reserved. 3 * 4 * @APPLE_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. Please obtain a copy of the License at 10 * http://www.opensource.apple.com/apsl/ and read it before using this 11 * file. 12 * 13 * The Original Code and all software distributed under the License are 14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 18 * Please see the License for the specific language governing rights and 19 * limitations under the License. 20 * 21 * @APPLE_LICENSE_HEADER_END@ 22 */ 23#if defined(PROFILE) 24#error This module cannot be compiled with profiling 25#endif 26 27/*- 28 * Copyright (c) 1983, 1992, 1993 29 * The Regents of the University of California. All rights reserved. 30 * 31 * Redistribution and use in source and binary forms, with or without 32 * modification, are permitted provided that the following conditions 33 * are met: 34 * 1. Redistributions of source code must retain the above copyright 35 * notice, this list of conditions and the following disclaimer. 36 * 2. Redistributions in binary form must reproduce the above copyright 37 * notice, this list of conditions and the following disclaimer in the 38 * documentation and/or other materials provided with the distribution. 39 * 3. All advertising materials mentioning features or use of this software 40 * must display the following acknowledgement: 41 * This product includes software developed by the University of 42 * California, Berkeley and its contributors. 43 * 4. Neither the name of the University nor the names of its contributors 44 * may be used to endorse or promote products derived from this software 45 * without specific prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 48 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 50 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 51 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 52 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 53 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 54 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 55 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 56 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 57 * SUCH DAMAGE. 58 */ 59/* 60 * History 61 * 2-Mar-90 Gregg Kellogg (gk) at NeXT 62 * Changed include of kern/mach.h to kern/mach_interface.h 63 * 64 * 1-May-90 Matthew Self (mself) at NeXT 65 * Added prototypes, and added casts to remove all warnings. 66 * Made all private data static. 67 * vm_deallocate old data defore vm_allocate'ing new data. 68 * Added new functions monoutput and monreset. 69 * 70 * 18-Dec-92 Development Environment Group at NeXT 71 * Added multiple profile areas, the ability to profile shlibs and the 72 * ability to profile rld loaded code. Moved the machine dependent mcount 73 * routine out of this source file. 74 * 75 * 13-Dec-92 Development Environment Group at NeXT 76 * Added support for dynamic shared libraries. Also removed the code that 77 * had been ifdef'ed out for profiling fixed shared libraries and 78 * objective-C. 79 * 80 * 29-Aug-11 Vishal Patel (vishal_patel) at Apple 81 * Removed code that made calls to deprecated syscalls profil() and 82 * add_profil(). The syscalls are not supported since 2008 and planned 83 * to be completely removed soon. Similarly the monitor apis are also 84 * deprecated. 85 * 86 */ 87 88#if defined(LIBC_SCCS) && !defined(lint) 89static char sccsid[] = "@(#)gmon.c 5.2 (Berkeley) 6/21/85"; 90#endif 91 92/* 93 * see profil(2) where this (SCALE_1_TO_1) is describe (incorrectly). 94 * 95 * The correct description: scale is a fixed point value with 96 * the binary point in the middle of the 32 bit value. (Bit 16 is 97 * 1, bit 15 is .5, etc.) 98 * 99 * Setting the scale to "1" (i.e. 0x10000), results in the kernel 100 * choosing the profile bucket address 1 to 1 with the pc sampled. 101 * Since buckets are shorts, if the profiling base were 0, then a pc 102 * of 0 increments bucket 0, a pc of 2 increments bucket 1, and a pc 103 * of 4 increments bucket 2.) (Actually, this seems a little bogus, 104 * 1 to 1 should map pc's to buckets -- that's probably what was 105 * intended from the man page, but historically.... 106 */ 107#define SCALE_1_TO_1 0x10000L 108 109#define MSG "No space for monitor buffer(s)\n" 110 111#include <stdio.h> 112#include <libc.h> 113#include <monitor.h> 114#include <sys/types.h> 115#include <sys/gmon.h> 116#include <sys/param.h> 117#include <sys/sysctl.h> 118#include <mach/mach.h> 119#include <mach-o/loader.h> 120#include <mach-o/dyld.h> 121#include <mach-o/getsect.h> 122 123/* 124 * These are defined in here and these declarations need to be moved to libc.h 125 * where the other declarations for the monitor(3) routines are declared. 126 */ 127extern void moninit( 128 void); 129extern void monaddition( 130 char *lowpc, 131 char *highpc); 132extern void moncount( 133 char *frompc, 134 char *selfpc); 135extern void monreset( 136 void); 137extern void monoutput( 138 const char *filename); 139 140static char profiling = -1; /* tas (test and set) location for NeXT */ 141static char init = 0; /* set while moninit() is being serviced */ 142 143static unsigned long order = 0; /* call order */ 144 145typedef struct { 146 /* the address range and size this mon struct refers to */ 147 char *lowpc; 148 char *highpc; 149 unsigned long textsize; 150 /* the data structures to support the arc's and their counts */ 151 unsigned short *froms; /* froms is unsigned shorts indexing into tos */ 152 tostruct_t *tos; 153 long tolimit; 154 /* the pc-sample buffer, it's size and scale */ 155 char *sbuf; 156 long ssiz; /* includes the gmonhdr_t */ 157 long scale; 158} mon_t; 159static mon_t *mon = NULL; 160static unsigned long nmon = 0; 161 162void 163moninit( 164void) 165{ 166 return; // Deprecated api. do nothing 167} 168 169void 170monstartup( 171char *lowpc, 172char *highpc) 173{ 174 return; // Deprecated api. do nothing 175} 176 177/* 178 * monaddtion() is used for adding additional pc ranges to profile. This is 179 * used for profiling dyld loaded code. 180 */ 181void 182monaddition( 183char *lowpc, 184char *highpc) 185{ 186 return; // Deprecated api. do nothing 187} 188 189void 190monreset( 191void) 192{ 193 return; // Deprecated api. do nothing 194} 195 196void 197monoutput( 198const char *filename) 199{ 200 return; // Deprecated api. do nothing 201} 202 203void 204monitor( 205char *lowpc, 206char *highpc, 207char *buf, 208int bufsiz, 209int nfunc) /* nfunc is not used; available for compatability only. */ 210{ 211 return; // Deprecated api. do nothing 212} 213 214/* 215 * Control profiling 216 * profiling is what mcount checks to see if 217 * all the data structures are ready. 218 */ 219void 220moncontrol( 221int mode) 222{ 223 return; // Deprecated api. do nothing 224} 225 226void 227moncount( 228char *frompc, 229char *selfpc) 230{ 231 return; //Deprecated api. do nothing 232} 233