#!/usr/sbin/dtrace -Zs /* * j_syscalls.d - count Java methods and syscalls using DTrace. * Written for the Java hotspot DTrace provider. * * $Id: j_syscalls.d,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $ * * This traces Java methods if the hotspot provider exists (1.6.0) and * the flag "+ExtendedDTraceProbes" is used. eg, * java -XX:+ExtendedDTraceProbes classfile * * USAGE: j_syscalls.d { -p PID | -c cmd } # hit Ctrl-C to end * * FIELDS: * PID Process ID * TYPE Type of call (method/syscall) * NAME Name of call * COUNT Number of calls during sample * * COPYRIGHT: Copyright (c) 2007 Brendan Gregg. * * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License, Version 1.0 only * (the "License"). You may not use this file except in compliance * with the License. * * You can obtain a copy of the license at Docs/cddl1.txt * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * CDDL HEADER END * * 09-Sep-2007 Brendan Gregg Created this. */ #pragma D option quiet dtrace:::BEGIN { printf("Tracing... Hit Ctrl-C to end.\n"); } hotspot$target:::method-entry { this->class = (char *)copyin(arg1, arg2 + 1); this->class[arg2] = '\0'; this->method = (char *)copyin(arg3, arg4 + 1); this->method[arg4] = '\0'; this->name = strjoin(strjoin(stringof(this->class), "."), stringof(this->method)); @calls[pid, "method", this->name] = count(); } syscall:::entry /pid == $target/ { @calls[pid, "syscall", probefunc] = count(); } dtrace:::END { printf(" %6s %-8s %-52s %8s\n", "PID", "TYPE", "NAME", "COUNT"); printa(" %6d %-8s %-52s %@8d\n", @calls); }