137 lines
4.3 KiB
D
137 lines
4.3 KiB
D
#!/usr/sbin/dtrace -Zs
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/*
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* Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of Oracle nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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*/
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/*
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* Usage:
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* 1. CriticalSection.d -c "java ..."
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* 2. CriticalSection.d -p JAVA_PID
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*
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* The script inspect a JNI application for Critical Section violations.
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*
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* Critical section is the space between calls to JNI methods:
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* - GetPrimitiveArrayCritical and ReleasePrimitiveArrayCritical; or
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* - GetStringCritical and ReleaseStringCritical.
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*
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* Inside a critical section, native code must not call other JNI functions,
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* or any system call that may cause the current thread to block and wait
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* for another Java thread. (For example, the current thread must not call
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* read on a stream being written by another Java thread.)
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*
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*/
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#pragma D option quiet
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#pragma D option destructive
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#pragma D option defaultargs
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#pragma D option bufsize=16m
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#pragma D option aggrate=100ms
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self int in_critical_section;
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self string critical_section_name;
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int CRITICAL_SECTION_VIOLATION_CNT;
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:::BEGIN
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{
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SAMPLE_NAME = "critical section violation checks";
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printf("BEGIN %s\n", SAMPLE_NAME);
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}
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/*
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* Multiple pairs of GetPrimitiveArrayCritical/ReleasePrimitiveArrayCritical,
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* GetStringCritical/ReleaseStringCritical may be nested
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*/
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hotspot_jni$target:::*_entry
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/self->in_critical_section > 0 &&
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probename != "GetPrimitiveArrayCritical_entry" &&
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probename != "GetStringCritical_entry" &&
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probename != "ReleasePrimitiveArrayCritical_entry" &&
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probename != "ReleaseStringCritical_entry" &&
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probename != "GetPrimitiveArrayCritical_return" &&
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probename != "GetStringCritical_return" &&
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probename != "ReleasePrimitiveArrayCritical_return" &&
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probename != "ReleaseStringCritical_return"/
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{
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printf("\nJNI call %s made from JNI critical region '%s'\n",
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probename, self->critical_section_name);
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printf("Jstack:\n");
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jstack(50, 500);
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CRITICAL_SECTION_VIOLATION_CNT ++;
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}
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syscall:::entry
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/pid == $target && self->in_critical_section > 0/
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{
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printf("\nSystem call %s made in JNI critical region '%s'\n",
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probefunc, self->critical_section_name);
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printf("Jstack:\n");
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jstack(50, 500);
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CRITICAL_SECTION_VIOLATION_CNT ++;
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}
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hotspot_jni$target:::ReleasePrimitiveArrayCritical_entry,
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hotspot_jni$target:::ReleaseStringCritical_entry
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/self->in_critical_section > 0/
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{
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self->in_critical_section --;
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}
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hotspot_jni$target:::GetPrimitiveArrayCritical_return
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{
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self->in_critical_section ++;
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self->critical_section_name = "GetPrimitiveArrayCritical";
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}
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hotspot_jni$target:::GetStringCritical_return
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{
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self->in_critical_section ++;
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self->critical_section_name = "GetStringCritical";
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}
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:::END
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{
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printf("%d critical section violations have been discovered\n",
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CRITICAL_SECTION_VIOLATION_CNT);
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printf("\nEND of %s\n", SAMPLE_NAME);
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}
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