1 #!/usr/sbin/dtrace -Zs 2 /* 3 * py_flow.d - snoop Python execution showing function flow. 4 * Written for the Python DTrace provider. 5 * 6 * $Id: py_flow.d,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $ 7 * 8 * This traces Python activity from all Python programs on the system 9 * running with Python provider support. 10 * 11 * USAGE: py_flow.d # hit Ctrl-C to end 12 * 13 * This watches Python function entries and returns, and indents child 14 * function calls. 15 * 16 * FIELDS: 17 * C CPU-id 18 * TIME(us) Time since boot, us 19 * FILE Filename that this function belongs to 20 * FUNC Function name 21 * 22 * LEGEND: 23 * -> function entry 24 * <- function return 25 * 26 * WARNING: Watch the first column carefully, it prints the CPU-id. If it 27 * changes, then it is very likely that the output has been shuffled. 28 * 29 * COPYRIGHT: Copyright (c) 2007 Brendan Gregg. 30 * 31 * CDDL HEADER START 32 * 33 * The contents of this file are subject to the terms of the 34 * Common Development and Distribution License, Version 1.0 only 35 * (the "License"). You may not use this file except in compliance 36 * with the License. 37 * 38 * You can obtain a copy of the license at Docs/cddl1.txt 39 * or http://www.opensolaris.org/os/licensing. 40 * See the License for the specific language governing permissions 41 * and limitations under the License. 42 * 43 * CDDL HEADER END 44 * 45 * 09-Sep-2007 Brendan Gregg Created this. 46 */ 47 48 #pragma D option quiet 49 #pragma D option switchrate=10 50 51 self int depth; 52 53 dtrace:::BEGIN 54 { 55 printf("%3s %-16s %-16s -- %s\n", "C", "TIME(us)", "FILE", "FUNC"); 56 } 57 58 python*:::function-entry 59 { 60 printf("%3d %-16d %-16s %*s-> %s\n", cpu, timestamp / 1000, 61 basename(copyinstr(arg0)), self->depth * 2, "", copyinstr(arg1)); 62 self->depth++; 63 } 64 65 python*:::function-return 66 { 67 self->depth -= self->depth > 0 ? 1 : 0; 68 printf("%3d %-16d %-16s %*s<- %s\n", cpu, timestamp / 1000, 69 basename(copyinstr(arg0)), self->depth * 2, "", copyinstr(arg1)); 70 } 71