Mercurial > hg > graal-jvmci-8
view agent/src/share/classes/sun/jvm/hotspot/oops/ConstMethod.java @ 6972:bd7a7ce2e264
6830717: replay of compilations would help with debugging
Summary: When java process crashed in compiler thread, repeat the compilation process will help finding root cause. This is done with using SA dump application class data and replay data from core dump, then use debug version of jvm to recompile the problematic java method.
Reviewed-by: kvn, twisti, sspitsyn
Contributed-by: yumin.qi@oracle.com
author | minqi |
---|---|
date | Mon, 12 Nov 2012 14:03:53 -0800 |
parents | da91efe96a93 |
children | b2dbd323c668 |
line wrap: on
line source
/* * Copyright (c) 2003, 2012, 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.oops; import java.io.*; import java.util.*; import sun.jvm.hotspot.code.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.interpreter.*; import sun.jvm.hotspot.memory.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.types.*; import sun.jvm.hotspot.utilities.*; public class ConstMethod extends VMObject { static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } }); } // anon-enum constants for _flags. private static int HAS_LINENUMBER_TABLE; private static int HAS_CHECKED_EXCEPTIONS; private static int HAS_LOCALVARIABLE_TABLE; private static int HAS_EXCEPTION_TABLE; private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { Type type = db.lookupType("ConstMethod"); constants = new MetadataField(type.getAddressField("_constants"), 0); constMethodSize = new CIntField(type.getCIntegerField("_constMethod_size"), 0); flags = new ByteField(type.getJByteField("_flags"), 0); // enum constants for flags HAS_LINENUMBER_TABLE = db.lookupIntConstant("ConstMethod::_has_linenumber_table").intValue(); HAS_CHECKED_EXCEPTIONS = db.lookupIntConstant("ConstMethod::_has_checked_exceptions").intValue(); HAS_LOCALVARIABLE_TABLE = db.lookupIntConstant("ConstMethod::_has_localvariable_table").intValue(); HAS_EXCEPTION_TABLE = db.lookupIntConstant("ConstMethod::_has_exception_table").intValue(); // Size of Java bytecodes allocated immediately after ConstMethod*. codeSize = new CIntField(type.getCIntegerField("_code_size"), 0); nameIndex = new CIntField(type.getCIntegerField("_name_index"), 0); signatureIndex = new CIntField(type.getCIntegerField("_signature_index"), 0); genericSignatureIndex = new CIntField(type.getCIntegerField("_generic_signature_index"),0); idnum = new CIntField(type.getCIntegerField("_method_idnum"), 0); // start of byte code bytecodeOffset = type.getSize(); type = db.lookupType("CheckedExceptionElement"); checkedExceptionElementSize = type.getSize(); type = db.lookupType("LocalVariableTableElement"); localVariableTableElementSize = type.getSize(); type = db.lookupType("ExceptionTableElement"); exceptionTableElementSize = type.getSize(); } public ConstMethod(Address addr) { super(addr); } // Fields private static MetadataField constants; private static CIntField constMethodSize; private static ByteField flags; private static CIntField codeSize; private static CIntField nameIndex; private static CIntField signatureIndex; private static CIntField genericSignatureIndex; private static CIntField idnum; // start of bytecode private static long bytecodeOffset; private static long checkedExceptionElementSize; private static long localVariableTableElementSize; private static long exceptionTableElementSize; public Method getMethod() { InstanceKlass ik = (InstanceKlass)getConstants().getPoolHolder(); MethodArray methods = ik.getMethods(); return methods.at((int)getIdNum()); } // Accessors for declared fields public ConstantPool getConstants() { return (ConstantPool) constants.getValue(this); } public long getConstMethodSize() { return constMethodSize.getValue(this); } public byte getFlags() { return flags.getValue(this); } public long getCodeSize() { return codeSize.getValue(this); } public long getNameIndex() { return nameIndex.getValue(this); } public long getSignatureIndex() { return signatureIndex.getValue(this); } public long getGenericSignatureIndex() { return genericSignatureIndex.getValue(this); } public long getIdNum() { return idnum.getValue(this); } public Symbol getName() { return getMethod().getName(); } public Symbol getSignature() { return getMethod().getSignature(); } public Symbol getGenericSignature() { return getMethod().getGenericSignature(); } // bytecode accessors /** Get a bytecode or breakpoint at the given bci */ public int getBytecodeOrBPAt(int bci) { return getAddress().getJByteAt(bytecodeOffset + bci) & 0xFF; } public byte getBytecodeByteArg(int bci) { return (byte) getBytecodeOrBPAt(bci); } /** Fetches a 16-bit big-endian ("Java ordered") value from the bytecode stream */ public short getBytecodeShortArg(int bci) { int hi = getBytecodeOrBPAt(bci); int lo = getBytecodeOrBPAt(bci + 1); return (short) ((hi << 8) | lo); } /** Fetches a 16-bit native ordered value from the bytecode stream */ public short getNativeShortArg(int bci) { int hi = getBytecodeOrBPAt(bci); int lo = getBytecodeOrBPAt(bci + 1); if (VM.getVM().isBigEndian()) { return (short) ((hi << 8) | lo); } else { return (short) ((lo << 8) | hi); } } /** Fetches a 32-bit big-endian ("Java ordered") value from the bytecode stream */ public int getBytecodeIntArg(int bci) { int b4 = getBytecodeOrBPAt(bci); int b3 = getBytecodeOrBPAt(bci + 1); int b2 = getBytecodeOrBPAt(bci + 2); int b1 = getBytecodeOrBPAt(bci + 3); return (b4 << 24) | (b3 << 16) | (b2 << 8) | b1; } /** Fetches a 32-bit native ordered value from the bytecode stream */ public int getNativeIntArg(int bci) { int b4 = getBytecodeOrBPAt(bci); int b3 = getBytecodeOrBPAt(bci + 1); int b2 = getBytecodeOrBPAt(bci + 2); int b1 = getBytecodeOrBPAt(bci + 3); if (VM.getVM().isBigEndian()) { return (b4 << 24) | (b3 << 16) | (b2 << 8) | b1; } else { return (b1 << 24) | (b2 << 16) | (b3 << 8) | b4; } } public byte[] getByteCode() { byte[] bc = new byte[ (int) getCodeSize() ]; for( int i=0; i < bc.length; i++ ) { long offs = bytecodeOffset + i; bc[i] = getAddress().getJByteAt( offs ); } return bc; } public long getSize() { return getConstMethodSize(); } public void printValueOn(PrintStream tty) { tty.print("ConstMethod " + getName().asString() + getSignature().asString() + "@" + getAddress()); } public void iterateFields(MetadataVisitor visitor) { visitor.doMetadata(constants, true); visitor.doCInt(constMethodSize, true); visitor.doByte(flags, true); visitor.doCInt(codeSize, true); visitor.doCInt(nameIndex, true); visitor.doCInt(signatureIndex, true); visitor.doCInt(genericSignatureIndex, true); visitor.doCInt(codeSize, true); } // Accessors public boolean hasLineNumberTable() { return (getFlags() & HAS_LINENUMBER_TABLE) != 0; } public int getLineNumberFromBCI(int bci) { if (!VM.getVM().isCore()) { if (bci == DebugInformationRecorder.SYNCHRONIZATION_ENTRY_BCI) bci = 0; } if (isNative()) { return -1; } if (Assert.ASSERTS_ENABLED) { Assert.that(bci == 0 || 0 <= bci && bci < getCodeSize(), "illegal bci"); } int bestBCI = 0; int bestLine = -1; if (hasLineNumberTable()) { // The line numbers are a short array of 2-tuples [start_pc, line_number]. // Not necessarily sorted and not necessarily one-to-one. CompressedLineNumberReadStream stream = new CompressedLineNumberReadStream(getAddress(), (int) offsetOfCompressedLineNumberTable()); while (stream.readPair()) { if (stream.bci() == bci) { // perfect match return stream.line(); } else { // update best_bci/line if (stream.bci() < bci && stream.bci() >= bestBCI) { bestBCI = stream.bci(); bestLine = stream.line(); } } } } return bestLine; } public LineNumberTableElement[] getLineNumberTable() { if (Assert.ASSERTS_ENABLED) { Assert.that(hasLineNumberTable(), "should only be called if table is present"); } int len = getLineNumberTableLength(); CompressedLineNumberReadStream stream = new CompressedLineNumberReadStream(getAddress(), (int) offsetOfCompressedLineNumberTable()); LineNumberTableElement[] ret = new LineNumberTableElement[len]; for (int idx = 0; idx < len; idx++) { stream.readPair(); ret[idx] = new LineNumberTableElement(stream.bci(), stream.line()); } return ret; } public boolean hasLocalVariableTable() { return (getFlags() & HAS_LOCALVARIABLE_TABLE) != 0; } public Symbol getLocalVariableName(int bci, int slot) { return getMethod().getLocalVariableName(bci, slot); } /** Should only be called if table is present */ public LocalVariableTableElement[] getLocalVariableTable() { if (Assert.ASSERTS_ENABLED) { Assert.that(hasLocalVariableTable(), "should only be called if table is present"); } LocalVariableTableElement[] ret = new LocalVariableTableElement[getLocalVariableTableLength()]; long offset = offsetOfLocalVariableTable(); for (int i = 0; i < ret.length; i++) { ret[i] = new LocalVariableTableElement(getAddress(), offset); offset += localVariableTableElementSize; } return ret; } public boolean hasExceptionTable() { return (getFlags() & HAS_EXCEPTION_TABLE) != 0; } public ExceptionTableElement[] getExceptionTable() { if (Assert.ASSERTS_ENABLED) { Assert.that(hasExceptionTable(), "should only be called if table is present"); } ExceptionTableElement[] ret = new ExceptionTableElement[getExceptionTableLength()]; long offset = offsetOfExceptionTable(); for (int i = 0; i < ret.length; i++) { ret[i] = new ExceptionTableElement(getAddress(), offset); offset += exceptionTableElementSize; } return ret; } public boolean hasCheckedExceptions() { return (getFlags() & HAS_CHECKED_EXCEPTIONS) != 0; } public CheckedExceptionElement[] getCheckedExceptions() { if (Assert.ASSERTS_ENABLED) { Assert.that(hasCheckedExceptions(), "should only be called if table is present"); } CheckedExceptionElement[] ret = new CheckedExceptionElement[getCheckedExceptionsLength()]; long offset = offsetOfCheckedExceptions(); for (int i = 0; i < ret.length; i++) { ret[i] = new CheckedExceptionElement(getAddress(), offset); offset += checkedExceptionElementSize; } return ret; } //--------------------------------------------------------------------------- // Internals only below this point // private boolean isNative() { return getMethod().isNative(); } // Offset of end of code private long offsetOfCodeEnd() { return bytecodeOffset + getCodeSize(); } // Offset of start of compressed line number table (see method.hpp) private long offsetOfCompressedLineNumberTable() { return offsetOfCodeEnd() + (isNative() ? 2 * VM.getVM().getAddressSize() : 0); } // Offset of last short in Method* private long offsetOfLastU2Element() { return getSize() * VM.getVM().getObjectHeap().getOopSize() - 2; } private long offsetOfCheckedExceptionsLength() { return offsetOfLastU2Element(); } private int getCheckedExceptionsLength() { if (hasCheckedExceptions()) { return (int) getAddress().getCIntegerAt(offsetOfCheckedExceptionsLength(), 2, true); } else { return 0; } } // Offset of start of checked exceptions private long offsetOfCheckedExceptions() { long offset = offsetOfCheckedExceptionsLength(); long length = getCheckedExceptionsLength(); if (Assert.ASSERTS_ENABLED) { Assert.that(length > 0, "should only be called if table is present"); } offset -= length * checkedExceptionElementSize; return offset; } private int getLineNumberTableLength() { int len = 0; if (hasLineNumberTable()) { CompressedLineNumberReadStream stream = new CompressedLineNumberReadStream(getAddress(), (int) offsetOfCompressedLineNumberTable()); while (stream.readPair()) { len += 1; } } return len; } private int getLocalVariableTableLength() { if (hasLocalVariableTable()) { return (int) getAddress().getCIntegerAt(offsetOfLocalVariableTableLength(), 2, true); } else { return 0; } } // Offset of local variable table length private long offsetOfLocalVariableTableLength() { if (Assert.ASSERTS_ENABLED) { Assert.that(hasLocalVariableTable(), "should only be called if table is present"); } if (hasExceptionTable()) { return offsetOfExceptionTable() - 2; } else if (hasCheckedExceptions()) { return offsetOfCheckedExceptions() - 2; } else { return offsetOfLastU2Element(); } } private long offsetOfLocalVariableTable() { long offset = offsetOfLocalVariableTableLength(); long length = getLocalVariableTableLength(); if (Assert.ASSERTS_ENABLED) { Assert.that(length > 0, "should only be called if table is present"); } offset -= length * localVariableTableElementSize; return offset; } private int getExceptionTableLength() { if (hasExceptionTable()) { return (int) getAddress().getCIntegerAt(offsetOfExceptionTableLength(), 2, true); } else { return 0; } } private long offsetOfExceptionTableLength() { if (Assert.ASSERTS_ENABLED) { Assert.that(hasExceptionTable(), "should only be called if table is present"); } if (hasCheckedExceptions()) { return offsetOfCheckedExceptions() - 2; } else { return offsetOfLastU2Element(); } } private long offsetOfExceptionTable() { long offset = offsetOfExceptionTableLength(); long length = getExceptionTableLength(); if (Assert.ASSERTS_ENABLED) { Assert.that(length > 0, "should only be called if table is present"); } offset -= length * exceptionTableElementSize; return offset; } }