1 #!/usr/sbin/dtrace -Zs 2 /* 3 * j_syscalls.d - count Java methods and syscalls using DTrace. 4 * Written for the Java hotspot DTrace provider. 5 * 6 * $Id: j_syscalls.d,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $ 7 * 8 * This traces Java methods if the hotspot provider exists (1.6.0) and 9 * the flag "+ExtendedDTraceProbes" is used. eg, 10 * java -XX:+ExtendedDTraceProbes classfile 11 * 12 * USAGE: j_syscalls.d { -p PID | -c cmd } # hit Ctrl-C to end 13 * 14 * FIELDS: 15 * PID Process ID 16 * TYPE Type of call (method/syscall) 17 * NAME Name of call 18 * COUNT Number of calls during sample 19 * 20 * COPYRIGHT: Copyright (c) 2007 Brendan Gregg. 21 * 22 * CDDL HEADER START 23 * 24 * The contents of this file are subject to the terms of the 25 * Common Development and Distribution License, Version 1.0 only 26 * (the "License"). You may not use this file except in compliance 27 * with the License. 28 * 29 * You can obtain a copy of the license at Docs/cddl1.txt 30 * or http://www.opensolaris.org/os/licensing. 31 * See the License for the specific language governing permissions 32 * and limitations under the License. 33 * 34 * CDDL HEADER END 35 * 36 * 09-Sep-2007 Brendan Gregg Created this. 37 */ 38 39 #pragma D option quiet 40 41 dtrace:::BEGIN 42 { 43 printf("Tracing... Hit Ctrl-C to end.\n"); 44 } 45 46 hotspot$target:::method-entry 47 { 48 this->class = (char *)copyin(arg1, arg2 + 1); 49 this->class[arg2] = '\0'; 50 this->method = (char *)copyin(arg3, arg4 + 1); 51 this->method[arg4] = '\0'; 52 this->name = strjoin(strjoin(stringof(this->class), "."), 53 stringof(this->method)); 54 @calls[pid, "method", this->name] = count(); 55 } 56 57 syscall:::entry 58 /pid == $target/ 59 { 60 @calls[pid, "syscall", probefunc] = count(); 61 } 62 63 64 dtrace:::END 65 { 66 printf(" %6s %-8s %-52s %8s\n", "PID", "TYPE", "NAME", "COUNT"); 67 printa(" %6d %-8s %-52s %@8d\n", @calls); 68 } 69