17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 77c478bd9Sstevel@tonic-gate * with the License. 87c478bd9Sstevel@tonic-gate * 97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 127c478bd9Sstevel@tonic-gate * and limitations under the License. 137c478bd9Sstevel@tonic-gate * 147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 197c478bd9Sstevel@tonic-gate * 207c478bd9Sstevel@tonic-gate * CDDL HEADER END 217c478bd9Sstevel@tonic-gate */ 227c478bd9Sstevel@tonic-gate /* 237c478bd9Sstevel@tonic-gate * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 247c478bd9Sstevel@tonic-gate * Use is subject to license terms. 257c478bd9Sstevel@tonic-gate */ 267c478bd9Sstevel@tonic-gate 277c478bd9Sstevel@tonic-gate #!/usr/sbin/dtrace -Fs 287c478bd9Sstevel@tonic-gate 297c478bd9Sstevel@tonic-gate syscall::open:entry, 307c478bd9Sstevel@tonic-gate syscall::open64:entry 317c478bd9Sstevel@tonic-gate { 327c478bd9Sstevel@tonic-gate /* 337c478bd9Sstevel@tonic-gate * The call to speculation() creates a new speculation. If this fails, 34*bbf21555SRichard Lowe * dtrace(8) will generate an error message indicating the reason for 357c478bd9Sstevel@tonic-gate * the failed speculation(), but subsequent speculative tracing will be 367c478bd9Sstevel@tonic-gate * silently discarded. 377c478bd9Sstevel@tonic-gate */ 387c478bd9Sstevel@tonic-gate self->spec = speculation(); 397c478bd9Sstevel@tonic-gate speculate(self->spec); 407c478bd9Sstevel@tonic-gate 417c478bd9Sstevel@tonic-gate /* 427c478bd9Sstevel@tonic-gate * Because this printf() follows the speculate(), it is being 437c478bd9Sstevel@tonic-gate * speculatively traced; it will only appear in the data buffer if the 447c478bd9Sstevel@tonic-gate * speculation is subsequently commited. 457c478bd9Sstevel@tonic-gate */ 467c478bd9Sstevel@tonic-gate printf("%s", stringof(copyinstr(arg0))); 477c478bd9Sstevel@tonic-gate } 487c478bd9Sstevel@tonic-gate 497c478bd9Sstevel@tonic-gate fbt::: 507c478bd9Sstevel@tonic-gate /self->spec/ 517c478bd9Sstevel@tonic-gate { 527c478bd9Sstevel@tonic-gate /* 537c478bd9Sstevel@tonic-gate * A speculate() with no other actions speculates the default action: 547c478bd9Sstevel@tonic-gate * tracing the EPID. 557c478bd9Sstevel@tonic-gate */ 567c478bd9Sstevel@tonic-gate speculate(self->spec); 577c478bd9Sstevel@tonic-gate } 587c478bd9Sstevel@tonic-gate 597c478bd9Sstevel@tonic-gate syscall::open:return, 607c478bd9Sstevel@tonic-gate syscall::open64:return 617c478bd9Sstevel@tonic-gate /self->spec/ 627c478bd9Sstevel@tonic-gate { 637c478bd9Sstevel@tonic-gate /* 647c478bd9Sstevel@tonic-gate * To balance the output with the -F option, we want to be sure that 657c478bd9Sstevel@tonic-gate * every entry has a matching return. Because we speculated the 667c478bd9Sstevel@tonic-gate * open entry above, we want to also speculate the open return. 677c478bd9Sstevel@tonic-gate * This is also a convenient time to trace the errno value. 687c478bd9Sstevel@tonic-gate */ 697c478bd9Sstevel@tonic-gate speculate(self->spec); 707c478bd9Sstevel@tonic-gate trace(errno); 717c478bd9Sstevel@tonic-gate } 727c478bd9Sstevel@tonic-gate 737c478bd9Sstevel@tonic-gate syscall::open:return, 747c478bd9Sstevel@tonic-gate syscall::open64:return 757c478bd9Sstevel@tonic-gate /self->spec && errno != 0/ 767c478bd9Sstevel@tonic-gate { 777c478bd9Sstevel@tonic-gate /* 787c478bd9Sstevel@tonic-gate * If errno is non-zero, we want to commit the speculation. 797c478bd9Sstevel@tonic-gate */ 807c478bd9Sstevel@tonic-gate commit(self->spec); 817c478bd9Sstevel@tonic-gate self->spec = 0; 827c478bd9Sstevel@tonic-gate } 837c478bd9Sstevel@tonic-gate 847c478bd9Sstevel@tonic-gate syscall::open:return, 857c478bd9Sstevel@tonic-gate syscall::open64:return 867c478bd9Sstevel@tonic-gate /self->spec && errno == 0/ 877c478bd9Sstevel@tonic-gate { 887c478bd9Sstevel@tonic-gate /* 897c478bd9Sstevel@tonic-gate * If errno is not set, we discard the speculation. 907c478bd9Sstevel@tonic-gate */ 917c478bd9Sstevel@tonic-gate discard(self->spec); 927c478bd9Sstevel@tonic-gate self->spec = 0; 937c478bd9Sstevel@tonic-gate } 94