0N/A#!/usr/sbin/dtrace -Zs
0N/A
0N/A/*
2362N/A * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
0N/A *
0N/A * Redistribution and use in source and binary forms, with or without
0N/A * modification, are permitted provided that the following conditions
0N/A * are met:
0N/A *
0N/A * - Redistributions of source code must retain the above copyright
0N/A * notice, this list of conditions and the following disclaimer.
0N/A *
0N/A * - Redistributions in binary form must reproduce the above copyright
0N/A * notice, this list of conditions and the following disclaimer in the
0N/A * documentation and/or other materials provided with the distribution.
0N/A *
2362N/A * - Neither the name of Oracle nor the names of its
0N/A * contributors may be used to endorse or promote products derived
0N/A * from this software without specific prior written permission.
0N/A *
0N/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
0N/A * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
0N/A * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
0N/A * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
0N/A * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
0N/A * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
0N/A * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
0N/A * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
0N/A * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
0N/A * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
0N/A * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
0N/A */
0N/A
0N/A/*
0N/A*/
0N/A
0N/A/*
0N/A * Usage:
0N/A * 1. CriticalSection_slow.d -c "java ..."
0N/A * 2. CriticalSection_slow.d -p JAVA_PID
0N/A *
0N/A * The script inspect a JNI application for Critical Section violations.
0N/A *
0N/A * Critical section is the space between calls to JNI methods:
0N/A * - GetPrimitiveArrayCritical and ReleasePrimitiveArrayCritical; or
0N/A * - GetStringCritical and ReleaseStringCritical.
0N/A *
0N/A * Inside a critical section, native code must not call other JNI functions,
0N/A * or any system call that may cause the current thread to block and wait
0N/A * for another Java thread. (For example, the current thread must not call
0N/A * read on a stream being written by another Java thread.)
0N/A *
0N/A */
0N/A
0N/A#pragma D option quiet
0N/A#pragma D option destructive
0N/A#pragma D option defaultargs
0N/A#pragma D option bufsize=16m
0N/A#pragma D option aggrate=100ms
0N/A
0N/A
0N/Aself int in_critical_section;
0N/Aself string critical_section_name;
0N/A
0N/Aself char *str_ptr;
0N/Aself string class_name;
0N/Aself string method_name;
0N/Aself string signature;
0N/A
0N/Aself int indent;
0N/Aself int JAVA_STACK_DEEP;
0N/A
0N/Aint CRITICAL_SECTION_VIOLATION_CNT;
0N/A
0N/A:::BEGIN
0N/A{
0N/A SAMPLE_NAME = "critical section violation checks";
0N/A
0N/A printf("BEGIN %s\n", SAMPLE_NAME);
0N/A}
0N/A
0N/Ahotspot$target:::*
0N/A/!self->JAVA_STACK_DEEP/
0N/A{
0N/A self->JAVA_STACK_DEEP = 0;
0N/A}
0N/A
0N/A
0N/Ahotspot$target:::method-return
0N/A/self->JAVA_STACK_DEEP > 0/
0N/A{
0N/A self->JAVA_STACK_DEEP --;
0N/A}
0N/A
0N/Ahotspot$target:::method-entry
0N/A{
0N/A self->JAVA_STACK_DEEP ++;
0N/A
0N/A self->str_ptr = (char*) copyin(arg1, arg2+1);
0N/A self->str_ptr[arg2] = '\0';
0N/A self->method_name = strjoin( (string) self->str_ptr, ":");
0N/A
0N/A self->str_ptr = (char*) copyin(arg3, arg4+1);
0N/A self->str_ptr[arg4] = '\0';
0N/A self->method_name = strjoin(self->method_name, (string) self->str_ptr);
0N/A self->method_name = strjoin(self->method_name, ":");
0N/A
0N/A self->str_ptr = (char*) copyin(arg5, arg6+1);
0N/A self->str_ptr[arg6] = '\0';
0N/A self->method_name = strjoin(self->method_name, (string) self->str_ptr);
0N/A
0N/A self->JAVA_STACK[self->JAVA_STACK_DEEP] = self->method_name;
0N/A
0N/A/* printf("%-10u%*s%s\n",
0N/A * curcpu->cpu_id, self->indent, "", self->method_name);
0N/A */
0N/A}
0N/A
0N/A
0N/A/*
0N/A * Multiple pairs of GetPrimitiveArrayCritical/ReleasePrimitiveArrayCritical,
0N/A * GetStringCritical/ReleaseStringCritical may be nested
0N/A */
0N/Ahotspot_jni$target:::*_entry
0N/A/self->in_critical_section > 0 &&
0N/A probename != "GetPrimitiveArrayCritical_entry" &&
0N/A probename != "GetStringCritical_entry" &&
0N/A probename != "ReleasePrimitiveArrayCritical_entry" &&
0N/A probename != "ReleaseStringCritical_entry" &&
0N/A probename != "GetPrimitiveArrayCritical_return" &&
0N/A probename != "GetStringCritical_return" &&
0N/A probename != "ReleasePrimitiveArrayCritical_return" &&
0N/A probename != "ReleaseStringCritical_return"/
0N/A{
0N/A printf("JNI call %s made from JNI critical region '%s' from %s\n",
0N/A probename, self->critical_section_name,
0N/A self->JAVA_STACK[self->JAVA_STACK_DEEP]);
0N/A
0N/A CRITICAL_SECTION_VIOLATION_CNT ++;
0N/A}
0N/A
0N/Asyscall:::entry
0N/A/pid == $target && self->in_critical_section > 0/
0N/A{
0N/A printf("system call %s made in JNI critical region '%s' from %s\n",
0N/A probefunc, self->critical_section_name,
0N/A self->JAVA_STACK[self->JAVA_STACK_DEEP]);
0N/A
0N/A CRITICAL_SECTION_VIOLATION_CNT ++;
0N/A}
0N/A
0N/Ahotspot_jni$target:::ReleasePrimitiveArrayCritical_entry,
0N/Ahotspot_jni$target:::ReleaseStringCritical_entry
0N/A/self->in_critical_section > 0/
0N/A{
0N/A self->in_critical_section --;
0N/A}
0N/A
0N/Ahotspot_jni$target:::GetPrimitiveArrayCritical_return
0N/A{
0N/A self->in_critical_section ++;
0N/A self->critical_section_name = "GetPrimitiveArrayCritical";
0N/A}
0N/A
0N/Ahotspot_jni$target:::GetStringCritical_return
0N/A{
0N/A self->in_critical_section ++;
0N/A self->critical_section_name = "GetStringCritical";
0N/A}
0N/A
0N/A
0N/A:::END
0N/A{
0N/A printf("%d critical section violations have been discovered\n",
0N/A CRITICAL_SECTION_VIOLATION_CNT);
0N/A
0N/A printf("\nEND of %s\n", SAMPLE_NAME);
0N/A}