1 #!/usr/sbin/dtrace -Zs 2 /* 3 * sh_flowtime.d - snoop Bourne shell execution with flow and delta times. 4 * Written for the sh DTrace provider. 5 * 6 * $Id: sh_flowtime.d,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $ 7 * 8 * This traces shell activity from all Bourne shells on the system that are 9 * running with sh provider support. 10 * 11 * USAGE: sh_flowtime.d # hit Ctrl-C to end 12 * 13 * This watches shell function entries and returns, and indents child 14 * function calls. Shell builtins are also printed. 15 * 16 * FIELDS: 17 * C CPU-id 18 * TIME(us) Time since boot, us 19 * FILE Filename that this function belongs to 20 * NAME Shell function or builtin name 21 * 22 * LEGEND: 23 * -> function entry 24 * <- function return 25 * > builtin 26 * | external command 27 * 28 * DELTAs: 29 * -> previous line to the start of this function 30 * <- previous line to the end of this function 31 * > previous line to the end of this builtin 32 * | previous line to the end of this command 33 * 34 * See sh_flowinfo.d for more verbose and more straightforward delta times. 35 * 36 * Filename and function names are printed if available. 37 * 38 * WARNING: Watch the first column carefully, it prints the CPU-id. If it 39 * changes, then it is very likely that the output has been shuffled. 40 * 41 * COPYRIGHT: Copyright (c) 2007 Brendan Gregg. 42 * 43 * CDDL HEADER START 44 * 45 * The contents of this file are subject to the terms of the 46 * Common Development and Distribution License, Version 1.0 only 47 * (the "License"). You may not use this file except in compliance 48 * with the License. 49 * 50 * You can obtain a copy of the license at Docs/cddl1.txt 51 * or http://www.opensolaris.org/os/licensing. 52 * See the License for the specific language governing permissions 53 * and limitations under the License. 54 * 55 * CDDL HEADER END 56 * 57 * 09-Sep-2007 Brendan Gregg Created this. 58 */ 59 60 #pragma D option quiet 61 #pragma D option switchrate=10 62 63 self int depth; 64 65 self uint64_t last; 66 67 dtrace:::BEGIN 68 { 69 printf("%3s %-16s %-16s %9s -- %s\n", "C", "TIME(us)", "FILE", 70 "DELTA(us)", "NAME"); 71 } 72 73 sh*:::function-entry, 74 sh*:::function-return, 75 sh*:::builtin-return, 76 sh*:::command-return 77 /self->last == 0/ 78 { 79 self->last = timestamp; 80 } 81 82 sh*:::function-entry 83 { 84 this->elapsed = (timestamp - self->last) / 1000; 85 printf("%3d %-16d %-16s %9d %*s-> %s\n", cpu, timestamp / 1000, 86 basename(copyinstr(arg0)), this->elapsed, self->depth * 2, "", 87 copyinstr(arg1)); 88 self->depth++; 89 self->last = timestamp; 90 } 91 92 sh*:::function-return 93 { 94 this->elapsed = (timestamp - self->last) / 1000; 95 self->depth -= self->depth > 0 ? 1 : 0; 96 printf("%3d %-16d %-16s %9d %*s<- %s\n", cpu, timestamp / 1000, 97 basename(copyinstr(arg0)), this->elapsed, self->depth * 2, "", 98 copyinstr(arg1)); 99 self->last = timestamp; 100 } 101 102 sh*:::builtin-return 103 { 104 this->elapsed = (timestamp - self->last) / 1000; 105 printf("%3d %-16d %-16s %9d %*s> %s\n", cpu, timestamp / 1000, 106 basename(copyinstr(arg0)), this->elapsed, self->depth * 2, "", 107 copyinstr(arg1)); 108 self->last = timestamp; 109 } 110 111 sh*:::command-return 112 { 113 this->elapsed = (timestamp - self->last) / 1000; 114 printf("%3d %-16d %-16s %9d %*s| %s\n", cpu, timestamp / 1000, 115 basename(copyinstr(arg0)), this->elapsed, self->depth * 2, "", 116 copyinstr(arg1)); 117 self->last = timestamp; 118 } 119