1#!/usr/sbin/dtrace -Zs 2/* 3 * j_syscolors.d - trace Java method flow plus syscalls, in color. 4 * Written for the Java hotspot DTrace provider. 5 * 6 * $Id: j_syscolors.d 58 2007-10-01 13:36:29Z brendan $ 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_syscolors.d { -p PID | -c cmd } # hit Ctrl-C to end 13 * 14 * This watches Java method entries and returns, and indents child 15 * method calls. 16 * 17 * FIELDS: 18 * C CPU-id 19 * PID Process ID 20 * TID Thread ID 21 * DELTA(us) Elapsed time from previous line to this line 22 * TYPE Type of call (func/syscall) 23 * NAME Java method or syscall name 24 * 25 * If the flow appears to jump, check the TID column - the JVM may have 26 * switched to another thread. 27 * 28 * WARNING: Watch the first column carefully, it prints the CPU-id. If it 29 * changes, then it is very likely that the output has been shuffled. 30 * Changes in TID will appear to shuffle output, as we change from one thread 31 * depth to the next. See Docs/Notes/ALLjavaflow.txt for additional notes. 32 * 33 * COPYRIGHT: Copyright (c) 2007 Brendan Gregg. 34 * 35 * CDDL HEADER START 36 * 37 * The contents of this file are subject to the terms of the 38 * Common Development and Distribution License, Version 1.0 only 39 * (the "License"). You may not use this file except in compliance 40 * with the License. 41 * 42 * You can obtain a copy of the license at Docs/cddl1.txt 43 * or http://www.opensolaris.org/os/licensing. 44 * See the License for the specific language governing permissions 45 * and limitations under the License. 46 * 47 * CDDL HEADER END 48 * 49 * 09-Sep-2007 Brendan Gregg Created this. 50 */ 51 52/* increasing bufsize can reduce drops */ 53#pragma D option bufsize=32m 54#pragma D option quiet 55#pragma D option switchrate=10 56 57self int depth[int]; 58 59dtrace:::BEGIN 60{ 61 color_java = "\033[2;35m"; /* violet, faint */ 62 color_line = "\033[1;35m"; /* violet, bold */ 63 color_syscall = "\033[2;32m"; /* green, faint */ 64 color_off = "\033[0m"; /* default */ 65 66 printf("%3s %6s/%-5s %9s %-8s -- %s\n", "C", "PID", "TID", "DELTA(us)", 67 "TYPE", "NAME"); 68} 69 70hotspot$target:::method-entry, 71hotspot$target:::method-return, 72syscall:::entry, 73syscall:::return 74/self->last == 0 && pid == $target/ 75{ 76 self->last = timestamp; 77} 78 79hotspot$target:::method-entry 80{ 81 this->delta = (timestamp - self->last) / 1000; 82 this->class = (char *)copyin(arg1, arg2 + 1); 83 this->class[arg2] = '\0'; 84 this->method = (char *)copyin(arg3, arg4 + 1); 85 this->method[arg4] = '\0'; 86 87 printf("%s%3d %6d/%-5d %9d %-8s %*s-> %s.%s%s\n", color_java, cpu, 88 pid, tid, this->delta, "method", self->depth[arg0] * 2, "", 89 stringof(this->class), stringof(this->method), color_off); 90 self->depth[arg0]++; 91 self->depthlast = self->depth[arg0]; 92 self->last = timestamp; 93} 94 95hotspot$target:::method-return 96{ 97 this->delta = (timestamp - self->last) / 1000; 98 this->class = (char *)copyin(arg1, arg2 + 1); 99 this->class[arg2] = '\0'; 100 this->method = (char *)copyin(arg3, arg4 + 1); 101 this->method[arg4] = '\0'; 102 103 self->depth[arg0] -= self->depth[arg0] > 0 ? 1 : 0; 104 printf("%s%3d %6d/%-5d %9d %-8s %*s<- %s.%s%s\n", color_java, cpu, 105 pid, tid, this->delta, "method", self->depth[arg0] * 2, "", 106 stringof(this->class), stringof(this->method), color_off); 107 self->depthlast = self->depth[arg0]; 108 self->last = timestamp; 109} 110 111syscall:::entry 112/pid == $target/ 113{ 114 this->delta = (timestamp - self->last) / 1000; 115 printf("%s%3d %6d/%-5d %9d %-8s %*s-> %s%s\n", color_syscall, 116 cpu, pid, tid, this->delta, "syscall", self->depthlast * 2, "", 117 probefunc, color_off); 118 self->last = timestamp; 119} 120 121syscall:::return 122/pid == $target/ 123{ 124 this->delta = (timestamp - self->last) / 1000; 125 printf("%s%3d %6d/%-5d %9d %-8s %*s<- %s%s\n", color_syscall, 126 cpu, pid, tid, this->delta, "syscall", self->depthlast * 2, "", 127 probefunc, color_off); 128 self->last = timestamp; 129} 130 131proc:::exit 132/pid == $target/ 133{ 134 exit(0); 135} 136