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 (c) 1994, by Sun Microsytems, Inc. 24*0Sstevel@tonic-gate */ 25*0Sstevel@tonic-gate 26*0Sstevel@tonic-gate #ifndef _PRB_INTERNALS_H 27*0Sstevel@tonic-gate #define _PRB_INTERNALS_H 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate /* 32*0Sstevel@tonic-gate * Includes 33*0Sstevel@tonic-gate */ 34*0Sstevel@tonic-gate 35*0Sstevel@tonic-gate #include <synch.h> 36*0Sstevel@tonic-gate 37*0Sstevel@tonic-gate #ifdef __cplusplus 38*0Sstevel@tonic-gate extern "C" { 39*0Sstevel@tonic-gate #endif 40*0Sstevel@tonic-gate 41*0Sstevel@tonic-gate /* 42*0Sstevel@tonic-gate * Notes: 43*0Sstevel@tonic-gate * 44*0Sstevel@tonic-gate * There is a memseg statically allocated in libtnfprobe. This memory is 45*0Sstevel@tonic-gate * consumed by the internal and external probe control fucntions for 46*0Sstevel@tonic-gate * initial_final blocks, and compositions. 47*0Sstevel@tonic-gate * 48*0Sstevel@tonic-gate * There is no mechanism for freeing this memory; it is leaked. This is 49*0Sstevel@tonic-gate * because the overhead involved to protect uses of old memory is too 50*0Sstevel@tonic-gate * high for probes. 51*0Sstevel@tonic-gate * 52*0Sstevel@tonic-gate * The target program internally allocates memory from the bottom edge of 53*0Sstevel@tonic-gate * the segment, and the external program allocates from the high edge of 54*0Sstevel@tonic-gate * the segment. 55*0Sstevel@tonic-gate * 56*0Sstevel@tonic-gate * The i_reqsz field is set by the internal memory allocation routine 57*0Sstevel@tonic-gate * while it is allocating. If the external process happens to freeze the 58*0Sstevel@tonic-gate * target process while it is in the middle of an internal allocation the 59*0Sstevel@tonic-gate * i_reqsz field allows the external process to be extra conservative in 60*0Sstevel@tonic-gate * avoiding a memory collision. 61*0Sstevel@tonic-gate */ 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate /* 64*0Sstevel@tonic-gate * Typedefs 65*0Sstevel@tonic-gate */ 66*0Sstevel@tonic-gate 67*0Sstevel@tonic-gate typedef struct tnf_memseg 68*0Sstevel@tonic-gate { 69*0Sstevel@tonic-gate char * min_p; /* points to min free byte */ 70*0Sstevel@tonic-gate char * max_p; /* points past max free byte */ 71*0Sstevel@tonic-gate 72*0Sstevel@tonic-gate mutex_t i_lock; /* internal sync lock */ 73*0Sstevel@tonic-gate size_t i_reqsz; /* internal request size */ 74*0Sstevel@tonic-gate 75*0Sstevel@tonic-gate } tnf_memseg_t; 76*0Sstevel@tonic-gate 77*0Sstevel@tonic-gate 78*0Sstevel@tonic-gate /* 79*0Sstevel@tonic-gate * Declarations 80*0Sstevel@tonic-gate */ 81*0Sstevel@tonic-gate 82*0Sstevel@tonic-gate char * __tnf_probe_alloc(size_t size); 83*0Sstevel@tonic-gate 84*0Sstevel@tonic-gate #ifdef __cplusplus 85*0Sstevel@tonic-gate } 86*0Sstevel@tonic-gate #endif 87*0Sstevel@tonic-gate 88*0Sstevel@tonic-gate #endif /* _PRB_INTERNALS_H */ 89