1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #include "mtlib.h" 30*0Sstevel@tonic-gate #include <unistd.h> 31*0Sstevel@tonic-gate #include <dlfcn.h> 32*0Sstevel@tonic-gate #include <signal.h> 33*0Sstevel@tonic-gate #include <stdarg.h> 34*0Sstevel@tonic-gate #include <stdio.h> 35*0Sstevel@tonic-gate #include <string.h> 36*0Sstevel@tonic-gate 37*0Sstevel@tonic-gate #include <sys/machelf.h> 38*0Sstevel@tonic-gate 39*0Sstevel@tonic-gate #include <umem_impl.h> 40*0Sstevel@tonic-gate #include "misc.h" 41*0Sstevel@tonic-gate 42*0Sstevel@tonic-gate #define UMEM_ERRFD 2 /* goes to standard error */ 43*0Sstevel@tonic-gate #define UMEM_MAX_ERROR_SIZE 4096 /* error messages are truncated to this */ 44*0Sstevel@tonic-gate 45*0Sstevel@tonic-gate /* 46*0Sstevel@tonic-gate * This is a circular buffer for holding error messages. 47*0Sstevel@tonic-gate * umem_error_enter appends to the buffer, adding "..." to the beginning 48*0Sstevel@tonic-gate * if data has been lost. 49*0Sstevel@tonic-gate */ 50*0Sstevel@tonic-gate 51*0Sstevel@tonic-gate #define ERR_SIZE 8192 /* must be a power of 2 */ 52*0Sstevel@tonic-gate 53*0Sstevel@tonic-gate static mutex_t umem_error_lock = DEFAULTMUTEX; 54*0Sstevel@tonic-gate 55*0Sstevel@tonic-gate static char umem_error_buffer[ERR_SIZE] = ""; 56*0Sstevel@tonic-gate static uint_t umem_error_begin = 0; 57*0Sstevel@tonic-gate static uint_t umem_error_end = 0; 58*0Sstevel@tonic-gate 59*0Sstevel@tonic-gate #define WRITE_AND_INC(var, value) { \ 60*0Sstevel@tonic-gate umem_error_buffer[(var)++] = (value); \ 61*0Sstevel@tonic-gate var = P2PHASE((var), ERR_SIZE); \ 62*0Sstevel@tonic-gate } 63*0Sstevel@tonic-gate 64*0Sstevel@tonic-gate static void 65*0Sstevel@tonic-gate umem_log_enter(const char *error_str) 66*0Sstevel@tonic-gate { 67*0Sstevel@tonic-gate int looped; 68*0Sstevel@tonic-gate char c; 69*0Sstevel@tonic-gate 70*0Sstevel@tonic-gate looped = 0; 71*0Sstevel@tonic-gate 72*0Sstevel@tonic-gate (void) mutex_lock(&umem_error_lock); 73*0Sstevel@tonic-gate 74*0Sstevel@tonic-gate while ((c = *error_str++) != '\0') { 75*0Sstevel@tonic-gate WRITE_AND_INC(umem_error_end, c); 76*0Sstevel@tonic-gate if (umem_error_end == umem_error_begin) 77*0Sstevel@tonic-gate looped = 1; 78*0Sstevel@tonic-gate } 79*0Sstevel@tonic-gate 80*0Sstevel@tonic-gate umem_error_buffer[umem_error_end] = 0; 81*0Sstevel@tonic-gate 82*0Sstevel@tonic-gate if (looped) { 83*0Sstevel@tonic-gate uint_t idx; 84*0Sstevel@tonic-gate umem_error_begin = P2PHASE(umem_error_end + 1, ERR_SIZE); 85*0Sstevel@tonic-gate 86*0Sstevel@tonic-gate idx = umem_error_begin; 87*0Sstevel@tonic-gate WRITE_AND_INC(idx, '.'); 88*0Sstevel@tonic-gate WRITE_AND_INC(idx, '.'); 89*0Sstevel@tonic-gate WRITE_AND_INC(idx, '.'); 90*0Sstevel@tonic-gate } 91*0Sstevel@tonic-gate 92*0Sstevel@tonic-gate (void) mutex_unlock(&umem_error_lock); 93*0Sstevel@tonic-gate } 94*0Sstevel@tonic-gate 95*0Sstevel@tonic-gate void 96*0Sstevel@tonic-gate umem_error_enter(const char *error_str) 97*0Sstevel@tonic-gate { 98*0Sstevel@tonic-gate #ifndef UMEM_STANDALONE 99*0Sstevel@tonic-gate if (umem_output && !issetugid()) 100*0Sstevel@tonic-gate (void) write(UMEM_ERRFD, error_str, strlen(error_str)); 101*0Sstevel@tonic-gate #endif 102*0Sstevel@tonic-gate 103*0Sstevel@tonic-gate umem_log_enter(error_str); 104*0Sstevel@tonic-gate } 105*0Sstevel@tonic-gate 106*0Sstevel@tonic-gate int 107*0Sstevel@tonic-gate highbit(ulong_t i) 108*0Sstevel@tonic-gate { 109*0Sstevel@tonic-gate register int h = 1; 110*0Sstevel@tonic-gate 111*0Sstevel@tonic-gate if (i == 0) 112*0Sstevel@tonic-gate return (0); 113*0Sstevel@tonic-gate #ifdef _LP64 114*0Sstevel@tonic-gate if (i & 0xffffffff00000000ul) { 115*0Sstevel@tonic-gate h += 32; i >>= 32; 116*0Sstevel@tonic-gate } 117*0Sstevel@tonic-gate #endif 118*0Sstevel@tonic-gate if (i & 0xffff0000) { 119*0Sstevel@tonic-gate h += 16; i >>= 16; 120*0Sstevel@tonic-gate } 121*0Sstevel@tonic-gate if (i & 0xff00) { 122*0Sstevel@tonic-gate h += 8; i >>= 8; 123*0Sstevel@tonic-gate } 124*0Sstevel@tonic-gate if (i & 0xf0) { 125*0Sstevel@tonic-gate h += 4; i >>= 4; 126*0Sstevel@tonic-gate } 127*0Sstevel@tonic-gate if (i & 0xc) { 128*0Sstevel@tonic-gate h += 2; i >>= 2; 129*0Sstevel@tonic-gate } 130*0Sstevel@tonic-gate if (i & 0x2) { 131*0Sstevel@tonic-gate h += 1; 132*0Sstevel@tonic-gate } 133*0Sstevel@tonic-gate return (h); 134*0Sstevel@tonic-gate } 135*0Sstevel@tonic-gate 136*0Sstevel@tonic-gate int 137*0Sstevel@tonic-gate lowbit(ulong_t i) 138*0Sstevel@tonic-gate { 139*0Sstevel@tonic-gate register int h = 1; 140*0Sstevel@tonic-gate 141*0Sstevel@tonic-gate if (i == 0) 142*0Sstevel@tonic-gate return (0); 143*0Sstevel@tonic-gate #ifdef _LP64 144*0Sstevel@tonic-gate if (!(i & 0xffffffff)) { 145*0Sstevel@tonic-gate h += 32; i >>= 32; 146*0Sstevel@tonic-gate } 147*0Sstevel@tonic-gate #endif 148*0Sstevel@tonic-gate if (!(i & 0xffff)) { 149*0Sstevel@tonic-gate h += 16; i >>= 16; 150*0Sstevel@tonic-gate } 151*0Sstevel@tonic-gate if (!(i & 0xff)) { 152*0Sstevel@tonic-gate h += 8; i >>= 8; 153*0Sstevel@tonic-gate } 154*0Sstevel@tonic-gate if (!(i & 0xf)) { 155*0Sstevel@tonic-gate h += 4; i >>= 4; 156*0Sstevel@tonic-gate } 157*0Sstevel@tonic-gate if (!(i & 0x3)) { 158*0Sstevel@tonic-gate h += 2; i >>= 2; 159*0Sstevel@tonic-gate } 160*0Sstevel@tonic-gate if (!(i & 0x1)) { 161*0Sstevel@tonic-gate h += 1; 162*0Sstevel@tonic-gate } 163*0Sstevel@tonic-gate return (h); 164*0Sstevel@tonic-gate } 165*0Sstevel@tonic-gate 166*0Sstevel@tonic-gate void 167*0Sstevel@tonic-gate hrt2ts(hrtime_t hrt, timestruc_t *tsp) 168*0Sstevel@tonic-gate { 169*0Sstevel@tonic-gate tsp->tv_sec = hrt / NANOSEC; 170*0Sstevel@tonic-gate tsp->tv_nsec = hrt % NANOSEC; 171*0Sstevel@tonic-gate } 172*0Sstevel@tonic-gate 173*0Sstevel@tonic-gate void 174*0Sstevel@tonic-gate log_message(const char *format, ...) 175*0Sstevel@tonic-gate { 176*0Sstevel@tonic-gate char buf[UMEM_MAX_ERROR_SIZE] = ""; 177*0Sstevel@tonic-gate 178*0Sstevel@tonic-gate va_list va; 179*0Sstevel@tonic-gate 180*0Sstevel@tonic-gate va_start(va, format); 181*0Sstevel@tonic-gate (void) vsnprintf(buf, UMEM_MAX_ERROR_SIZE-1, format, va); 182*0Sstevel@tonic-gate va_end(va); 183*0Sstevel@tonic-gate 184*0Sstevel@tonic-gate #ifndef UMEM_STANDALONE 185*0Sstevel@tonic-gate if (umem_output > 1) 186*0Sstevel@tonic-gate (void) write(UMEM_ERRFD, buf, strlen(buf)); 187*0Sstevel@tonic-gate #endif 188*0Sstevel@tonic-gate 189*0Sstevel@tonic-gate umem_log_enter(buf); 190*0Sstevel@tonic-gate } 191*0Sstevel@tonic-gate 192*0Sstevel@tonic-gate #ifndef UMEM_STANDALONE 193*0Sstevel@tonic-gate void 194*0Sstevel@tonic-gate debug_printf(const char *format, ...) 195*0Sstevel@tonic-gate { 196*0Sstevel@tonic-gate char buf[UMEM_MAX_ERROR_SIZE] = ""; 197*0Sstevel@tonic-gate 198*0Sstevel@tonic-gate va_list va; 199*0Sstevel@tonic-gate 200*0Sstevel@tonic-gate va_start(va, format); 201*0Sstevel@tonic-gate (void) vsnprintf(buf, UMEM_MAX_ERROR_SIZE-1, format, va); 202*0Sstevel@tonic-gate va_end(va); 203*0Sstevel@tonic-gate 204*0Sstevel@tonic-gate (void) write(UMEM_ERRFD, buf, strlen(buf)); 205*0Sstevel@tonic-gate } 206*0Sstevel@tonic-gate #endif 207*0Sstevel@tonic-gate 208*0Sstevel@tonic-gate void 209*0Sstevel@tonic-gate umem_vprintf(const char *format, va_list va) 210*0Sstevel@tonic-gate { 211*0Sstevel@tonic-gate char buf[UMEM_MAX_ERROR_SIZE] = ""; 212*0Sstevel@tonic-gate 213*0Sstevel@tonic-gate (void) vsnprintf(buf, UMEM_MAX_ERROR_SIZE-1, format, va); 214*0Sstevel@tonic-gate 215*0Sstevel@tonic-gate umem_error_enter(buf); 216*0Sstevel@tonic-gate } 217*0Sstevel@tonic-gate 218*0Sstevel@tonic-gate void 219*0Sstevel@tonic-gate umem_printf(const char *format, ...) 220*0Sstevel@tonic-gate { 221*0Sstevel@tonic-gate va_list va; 222*0Sstevel@tonic-gate 223*0Sstevel@tonic-gate va_start(va, format); 224*0Sstevel@tonic-gate umem_vprintf(format, va); 225*0Sstevel@tonic-gate va_end(va); 226*0Sstevel@tonic-gate } 227*0Sstevel@tonic-gate 228*0Sstevel@tonic-gate /*ARGSUSED*/ 229*0Sstevel@tonic-gate void 230*0Sstevel@tonic-gate umem_printf_warn(void *ignored, const char *format, ...) 231*0Sstevel@tonic-gate { 232*0Sstevel@tonic-gate va_list va; 233*0Sstevel@tonic-gate 234*0Sstevel@tonic-gate va_start(va, format); 235*0Sstevel@tonic-gate umem_vprintf(format, va); 236*0Sstevel@tonic-gate va_end(va); 237*0Sstevel@tonic-gate } 238*0Sstevel@tonic-gate 239*0Sstevel@tonic-gate /* 240*0Sstevel@tonic-gate * print_sym tries to print out the symbol and offset of a pointer 241*0Sstevel@tonic-gate */ 242*0Sstevel@tonic-gate int 243*0Sstevel@tonic-gate print_sym(void *pointer) 244*0Sstevel@tonic-gate { 245*0Sstevel@tonic-gate int result; 246*0Sstevel@tonic-gate Dl_info sym_info; 247*0Sstevel@tonic-gate 248*0Sstevel@tonic-gate uintptr_t end = NULL; 249*0Sstevel@tonic-gate 250*0Sstevel@tonic-gate Sym *ext_info = NULL; 251*0Sstevel@tonic-gate 252*0Sstevel@tonic-gate result = dladdr1(pointer, &sym_info, (void **)&ext_info, 253*0Sstevel@tonic-gate RTLD_DL_SYMENT); 254*0Sstevel@tonic-gate 255*0Sstevel@tonic-gate if (result != 0) { 256*0Sstevel@tonic-gate const char *endpath; 257*0Sstevel@tonic-gate 258*0Sstevel@tonic-gate end = (uintptr_t)sym_info.dli_saddr + ext_info->st_size; 259*0Sstevel@tonic-gate 260*0Sstevel@tonic-gate endpath = strrchr(sym_info.dli_fname, '/'); 261*0Sstevel@tonic-gate if (endpath) 262*0Sstevel@tonic-gate endpath++; 263*0Sstevel@tonic-gate else 264*0Sstevel@tonic-gate endpath = sym_info.dli_fname; 265*0Sstevel@tonic-gate umem_printf("%s'", endpath); 266*0Sstevel@tonic-gate } 267*0Sstevel@tonic-gate 268*0Sstevel@tonic-gate if (result == 0 || (uintptr_t)pointer > end) { 269*0Sstevel@tonic-gate umem_printf("?? (0x%p)", pointer); 270*0Sstevel@tonic-gate return (0); 271*0Sstevel@tonic-gate } else { 272*0Sstevel@tonic-gate umem_printf("%s+0x%p", sym_info.dli_sname, 273*0Sstevel@tonic-gate (char *)pointer - (char *)sym_info.dli_saddr); 274*0Sstevel@tonic-gate return (1); 275*0Sstevel@tonic-gate } 276*0Sstevel@tonic-gate } 277