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-rwxr-xr-xJava/j_syscalls.d68
1 files changed, 68 insertions, 0 deletions
diff --git a/Java/j_syscalls.d b/Java/j_syscalls.d
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+#!/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 19 2007-09-12 07:47:59Z brendan $
+ *
+ * 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);
+}