| /* |
| * Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| package sun.jvm.hotspot.utilities; |
| |
| import java.io.*; |
| import sun.jvm.hotspot.code.*; |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.gc.shared.*; |
| import sun.jvm.hotspot.interpreter.*; |
| import sun.jvm.hotspot.runtime.*; |
| import sun.jvm.hotspot.memory.*; |
| |
| /** This class attempts to describe possible locations of pointers in |
| the VM. */ |
| |
| public class PointerLocation { |
| ////////////////////////////////////////////////////////////////// |
| // // |
| // These are package private to simplify the implementation and // |
| // interaction with PointerFinder // |
| // // |
| ////////////////////////////////////////////////////////////////// |
| |
| Address addr; |
| |
| CollectedHeap heap; |
| Generation gen; |
| |
| // If UseTLAB was enabled and the pointer was found in a |
| // currently-active TLAB, these will be set |
| boolean inTLAB; |
| JavaThread tlabThread; |
| ThreadLocalAllocBuffer tlab; |
| |
| // Generated code locations |
| boolean inInterpreter; |
| boolean inCodeCache; |
| |
| // FIXME: add other locations like VTableStubs, StubRoutines, maybe |
| // even "on thread x's stack" |
| |
| InterpreterCodelet interpreterCodelet; |
| CodeBlob blob; |
| // FIXME: add more detail about CodeBlob |
| boolean inBlobCode; |
| boolean inBlobData; |
| boolean inBlobOops; |
| boolean inBlobUnknownLocation; |
| |
| boolean inStrongGlobalJNIHandleBlock; |
| boolean inWeakGlobalJNIHandleBlock; |
| boolean inLocalJNIHandleBlock; |
| JNIHandleBlock handleBlock; |
| sun.jvm.hotspot.runtime.Thread handleThread; |
| |
| public PointerLocation(Address addr) { |
| this.addr = addr; |
| } |
| |
| public boolean isInHeap() { |
| return (heap != null || (gen != null)); |
| } |
| |
| public boolean isInNewGen() { |
| return ((gen != null) && (gen == ((GenCollectedHeap)heap).getGen(0))); |
| } |
| |
| public boolean isInOldGen() { |
| return ((gen != null) && (gen == ((GenCollectedHeap)heap).getGen(1))); |
| } |
| |
| public boolean inOtherGen() { |
| return (!isInNewGen() && !isInOldGen()); |
| } |
| |
| /** Only valid if isInHeap() */ |
| public Generation getGeneration() { |
| return gen; |
| } |
| |
| /** This may be true if isInNewGen is also true */ |
| public boolean isInTLAB() { |
| return inTLAB; |
| } |
| |
| /** Only valid if isInTLAB() returns true */ |
| public JavaThread getTLABThread() { |
| return tlabThread; |
| } |
| |
| /** Only valid if isInTLAB() returns true */ |
| public ThreadLocalAllocBuffer getTLAB() { |
| return tlab; |
| } |
| |
| public boolean isInInterpreter() { |
| return inInterpreter; |
| } |
| |
| /** For now, only valid if isInInterpreter is true */ |
| public InterpreterCodelet getInterpreterCodelet() { |
| return interpreterCodelet; |
| } |
| |
| public boolean isInCodeCache() { |
| return inCodeCache; |
| } |
| |
| /** For now, only valid if isInCodeCache is true */ |
| public CodeBlob getCodeBlob() { |
| return blob; |
| } |
| |
| public boolean isInBlobCode() { |
| return inBlobCode; |
| } |
| |
| public boolean isInBlobData() { |
| return inBlobData; |
| } |
| |
| public boolean isInBlobOops() { |
| return inBlobOops; |
| } |
| |
| public boolean isInBlobUnknownLocation() { |
| return inBlobUnknownLocation; |
| } |
| |
| public boolean isInStrongGlobalJNIHandleBlock() { |
| return inStrongGlobalJNIHandleBlock; |
| } |
| |
| public boolean isInWeakGlobalJNIHandleBlock() { |
| return inWeakGlobalJNIHandleBlock; |
| } |
| |
| public boolean isInLocalJNIHandleBlock() { |
| return inLocalJNIHandleBlock; |
| } |
| |
| /** Only valid if isInStrongGlobalJNIHandleBlock, |
| isInWeakGlobalJNIHandleBlock, or isInLocalJNIHandleBlock is true */ |
| public JNIHandleBlock getJNIHandleBlock() { |
| return handleBlock; |
| } |
| |
| /** Only valid if isInLocalJNIHandleBlock is true */ |
| public sun.jvm.hotspot.runtime.Thread getJNIHandleThread() { |
| return handleThread; |
| } |
| |
| public boolean isUnknown() { |
| return (!(isInHeap() || isInInterpreter() || isInCodeCache() || |
| isInStrongGlobalJNIHandleBlock() || isInWeakGlobalJNIHandleBlock() || isInLocalJNIHandleBlock())); |
| } |
| |
| public String toString() { |
| ByteArrayOutputStream bos = new ByteArrayOutputStream(); |
| printOn(new PrintStream(bos)); |
| return bos.toString(); |
| } |
| |
| public void print() { |
| printOn(System.out); |
| } |
| |
| public void printOn(PrintStream tty) { |
| tty.print("Address "); |
| if (addr == null) { |
| tty.print("0x0"); |
| } else { |
| tty.print(addr.toString()); |
| } |
| tty.print(": "); |
| if (isInHeap()) { |
| if (isInTLAB()) { |
| tty.print("In thread-local allocation buffer for thread \"" + |
| getTLABThread().getThreadName() + "\" ("); |
| getTLABThread().printThreadIDOn(tty); |
| tty.print(") "); |
| getTLAB().printOn(tty); |
| } else { |
| if (isInNewGen()) { |
| tty.print("In new generation "); |
| } else if (isInOldGen()) { |
| tty.print("In old generation "); |
| } else { |
| tty.print("In unknown section of Java heap"); |
| } |
| if (getGeneration() != null) { |
| getGeneration().printOn(tty); |
| } |
| } |
| } else if (isInInterpreter()) { |
| tty.println("In interpreter codelet \"" + interpreterCodelet.getDescription() + "\""); |
| interpreterCodelet.printOn(tty); |
| } else if (isInCodeCache()) { |
| CodeBlob b = getCodeBlob(); |
| tty.print("In "); |
| if (isInBlobCode()) { |
| tty.print("code"); |
| } else if (isInBlobData()) { |
| tty.print("data"); |
| } else if (isInBlobOops()) { |
| tty.print("oops"); |
| } else { |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(isInBlobUnknownLocation(), "Should have known location in CodeBlob"); |
| } |
| tty.print("unknown location"); |
| } |
| tty.print(" in "); |
| b.printOn(tty); |
| |
| // FIXME: add more detail |
| } else if (isInStrongGlobalJNIHandleBlock() || |
| isInWeakGlobalJNIHandleBlock() || |
| isInLocalJNIHandleBlock()) { |
| tty.print("In "); |
| if (isInStrongGlobalJNIHandleBlock()) { |
| tty.print("strong global"); |
| } else if (isInWeakGlobalJNIHandleBlock()) { |
| tty.print("weak global"); |
| } else { |
| tty.print("thread-local"); |
| } |
| tty.print(" JNI handle block (" + handleBlock.top() + " handle slots present)"); |
| if (isInLocalJNIHandleBlock()) { |
| if (handleThread.isJavaThread()) { |
| tty.print(" for JavaThread "); |
| ((JavaThread) handleThread).printThreadIDOn(tty); |
| } else { |
| tty.print("for a non-Java Thread"); |
| } |
| } |
| } else { |
| // This must be last |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(isUnknown(), "Should have unknown location"); |
| } |
| tty.print("In unknown location"); |
| } |
| } |
| } |