#!/usr/sbin/dtrace -Zs /* * j_calls.d - count Java calls (method/...) using DTrace. * Written for the Java hotspot DTrace provider. * * $Id: j_calls.d,v 1.1.1.1 2015/09/30 22:01:07 christos Exp $ * * This traces activity from all Java processes on the system with hotspot * provider support (1.6.0). Method calls and object allocation are only * visible when using the flag "+ExtendedDTraceProbes". eg, * java -XX:+ExtendedDTraceProbes classfile * * USAGE: j_calls.d # hit Ctrl-C to end * * FIELDS: * PID Process ID * TYPE Type of call (see below) * NAME Name of call * COUNT Number of calls during sample * * TYPEs: * cload class load * method method call * mcompile method compile * mload compiled method load * oalloc object alloc * thread thread start * * 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*:::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(); } hotspot*:::object-alloc { this->class = (char *)copyin(arg1, arg2 + 1); this->class[arg2] = '\0'; @calls[pid, "oalloc", stringof(this->class)] = count(); } hotspot*:::class-loaded { this->class = (char *)copyin(arg0, arg1 + 1); this->class[arg1] = '\0'; @calls[pid, "cload", stringof(this->class)] = count(); } hotspot*:::thread-start { this->thread = (char *)copyin(arg0, arg1 + 1); this->thread[arg1] = '\0'; @calls[pid, "thread", stringof(this->thread)] = count(); } hotspot*:::method-compile-begin { this->class = (char *)copyin(arg0, arg1 + 1); this->class[arg1] = '\0'; this->method = (char *)copyin(arg2, arg3 + 1); this->method[arg3] = '\0'; this->name = strjoin(strjoin(stringof(this->class), "."), stringof(this->method)); @calls[pid, "mcompile", this->name] = count(); } hotspot*:::compiled-method-load { this->class = (char *)copyin(arg0, arg1 + 1); this->class[arg1] = '\0'; this->method = (char *)copyin(arg2, arg3 + 1); this->method[arg3] = '\0'; this->name = strjoin(strjoin(stringof(this->class), "."), stringof(this->method)); @calls[pid, "mload", this->name] = count(); } dtrace:::END { printf(" %6s %-8s %-52s %8s\n", "PID", "TYPE", "NAME", "COUNT"); printa(" %6d %-8s %-52s %@8d\n", @calls); }