Java example source code file (HeapHprofBinWriter.java)
The HeapHprofBinWriter.java Java example source code/*
* Copyright (c) 2004, 2013, 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 java.nio.channels.*;
import java.util.*;
import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.memory.*;
import sun.jvm.hotspot.oops.*;
import sun.jvm.hotspot.runtime.*;
/*
* This class writes Java heap in hprof binary format. This format is
* used by Heap Analysis Tool (HAT). The class is heavily influenced
* by 'hprof_io.c' of 1.5 new hprof implementation.
*/
/* hprof binary format: (result either written to a file or sent over
* the network).
*
* WARNING: This format is still under development, and is subject to
* change without notice.
*
* header "JAVA PROFILE 1.0.1" or "JAVA PROFILE 1.0.2" (0-terminated)
* u4 size of identifiers. Identifiers are used to represent
* UTF8 strings, objects, stack traces, etc. They usually
* have the same size as host pointers. For example, on
* Solaris and Win32, the size is 4.
* u4 high word
* u4 low word number of milliseconds since 0:00 GMT, 1/1/70
* [record]* a sequence of records.
*
*/
/*
*
* Record format:
*
* u1 a TAG denoting the type of the record
* u4 number of *microseconds* since the time stamp in the
* header. (wraps around in a little more than an hour)
* u4 number of bytes *remaining* in the record. Note that
* this number excludes the tag and the length field itself.
* [u1]* BODY of the record (a sequence of bytes)
*/
/*
* The following TAGs are supported:
*
* TAG BODY notes
*----------------------------------------------------------
* HPROF_UTF8 a UTF8-encoded name
*
* id name ID
* [u1]* UTF8 characters (no trailing zero)
*
* HPROF_LOAD_CLASS a newly loaded class
*
* u4 class serial number (> 0)
* id class object ID
* u4 stack trace serial number
* id class name ID
*
* HPROF_UNLOAD_CLASS an unloading class
*
* u4 class serial_number
*
* HPROF_FRAME a Java stack frame
*
* id stack frame ID
* id method name ID
* id method signature ID
* id source file name ID
* u4 class serial number
* i4 line number. >0: normal
* -1: unknown
* -2: compiled method
* -3: native method
*
* HPROF_TRACE a Java stack trace
*
* u4 stack trace serial number
* u4 thread serial number
* u4 number of frames
* [id]* stack frame IDs
*
*
* HPROF_ALLOC_SITES a set of heap allocation sites, obtained after GC
*
* u2 flags 0x0001: incremental vs. complete
* 0x0002: sorted by allocation vs. live
* 0x0004: whether to force a GC
* u4 cutoff ratio
* u4 total live bytes
* u4 total live instances
* u8 total bytes allocated
* u8 total instances allocated
* u4 number of sites that follow
* [u1 is_array: 0: normal object
* 2: object array
* 4: boolean array
* 5: char array
* 6: float array
* 7: double array
* 8: byte array
* 9: short array
* 10: int array
* 11: long array
* u4 class serial number (may be zero during startup)
* u4 stack trace serial number
* u4 number of bytes alive
* u4 number of instances alive
* u4 number of bytes allocated
* u4]* number of instance allocated
*
* HPROF_START_THREAD a newly started thread.
*
* u4 thread serial number (> 0)
* id thread object ID
* u4 stack trace serial number
* id thread name ID
* id thread group name ID
* id thread group parent name ID
*
* HPROF_END_THREAD a terminating thread.
*
* u4 thread serial number
*
* HPROF_HEAP_SUMMARY heap summary
*
* u4 total live bytes
* u4 total live instances
* u8 total bytes allocated
* u8 total instances allocated
*
* HPROF_HEAP_DUMP denote a heap dump
*
* [heap dump sub-records]*
*
* There are four kinds of heap dump sub-records:
*
* u1 sub-record type
*
* HPROF_GC_ROOT_UNKNOWN unknown root
*
* id object ID
*
* HPROF_GC_ROOT_THREAD_OBJ thread object
*
* id thread object ID (may be 0 for a
* thread newly attached through JNI)
* u4 thread sequence number
* u4 stack trace sequence number
*
* HPROF_GC_ROOT_JNI_GLOBAL JNI global ref root
*
* id object ID
* id JNI global ref ID
*
* HPROF_GC_ROOT_JNI_LOCAL JNI local ref
*
* id object ID
* u4 thread serial number
* u4 frame # in stack trace (-1 for empty)
*
* HPROF_GC_ROOT_JAVA_FRAME Java stack frame
*
* id object ID
* u4 thread serial number
* u4 frame # in stack trace (-1 for empty)
*
* HPROF_GC_ROOT_NATIVE_STACK Native stack
*
* id object ID
* u4 thread serial number
*
* HPROF_GC_ROOT_STICKY_CLASS System class
*
* id object ID
*
* HPROF_GC_ROOT_THREAD_BLOCK Reference from thread block
*
* id object ID
* u4 thread serial number
*
* HPROF_GC_ROOT_MONITOR_USED Busy monitor
*
* id object ID
*
* HPROF_GC_CLASS_DUMP dump of a class object
*
* id class object ID
* u4 stack trace serial number
* id super class object ID
* id class loader object ID
* id signers object ID
* id protection domain object ID
* id reserved
* id reserved
*
* u4 instance size (in bytes)
*
* u2 size of constant pool
* [u2, constant pool index,
* ty, type
* 2: object
* 4: boolean
* 5: char
* 6: float
* 7: double
* 8: byte
* 9: short
* 10: int
* 11: long
* vl]* and value
*
* u2 number of static fields
* [id, static field name,
* ty, type,
* vl]* and value
*
* u2 number of inst. fields (not inc. super)
* [id, instance field name,
* ty]* type
*
* HPROF_GC_INSTANCE_DUMP dump of a normal object
*
* id object ID
* u4 stack trace serial number
* id class object ID
* u4 number of bytes that follow
* [vl]* instance field values (class, followed
* by super, super's super ...)
*
* HPROF_GC_OBJ_ARRAY_DUMP dump of an object array
*
* id array object ID
* u4 stack trace serial number
* u4 number of elements
* id array class ID
* [id]* elements
*
* HPROF_GC_PRIM_ARRAY_DUMP dump of a primitive array
*
* id array object ID
* u4 stack trace serial number
* u4 number of elements
* u1 element type
* 4: boolean array
* 5: char array
* 6: float array
* 7: double array
* 8: byte array
* 9: short array
* 10: int array
* 11: long array
* [u1]* elements
*
* HPROF_CPU_SAMPLES a set of sample traces of running threads
*
* u4 total number of samples
* u4 # of traces
* [u4 # of samples
* u4]* stack trace serial number
*
* HPROF_CONTROL_SETTINGS the settings of on/off switches
*
* u4 0x00000001: alloc traces on/off
* 0x00000002: cpu sampling on/off
* u2 stack trace depth
*
*
* When the header is "JAVA PROFILE 1.0.2" a heap dump can optionally
* be generated as a sequence of heap dump segments. This sequence is
* terminated by an end record. The additional tags allowed by format
* "JAVA PROFILE 1.0.2" are:
*
* HPROF_HEAP_DUMP_SEGMENT denote a heap dump segment
*
* [heap dump sub-records]*
* The same sub-record types allowed by HPROF_HEAP_DUMP
*
* HPROF_HEAP_DUMP_END denotes the end of a heap dump
*
*/
public class HeapHprofBinWriter extends AbstractHeapGraphWriter {
// The heap size threshold used to determine if segmented format
// ("JAVA PROFILE 1.0.2") should be used.
private static final long HPROF_SEGMENTED_HEAP_DUMP_THRESHOLD = 2L * 0x40000000;
// The approximate size of a heap segment. Used to calculate when to create
// a new segment.
private static final long HPROF_SEGMENTED_HEAP_DUMP_SEGMENT_SIZE = 1L * 0x40000000;
// hprof binary file header
private static final String HPROF_HEADER_1_0_1 = "JAVA PROFILE 1.0.1";
private static final String HPROF_HEADER_1_0_2 = "JAVA PROFILE 1.0.2";
// constants in enum HprofTag
private static final int HPROF_UTF8 = 0x01;
private static final int HPROF_LOAD_CLASS = 0x02;
private static final int HPROF_UNLOAD_CLASS = 0x03;
private static final int HPROF_FRAME = 0x04;
private static final int HPROF_TRACE = 0x05;
private static final int HPROF_ALLOC_SITES = 0x06;
private static final int HPROF_HEAP_SUMMARY = 0x07;
private static final int HPROF_START_THREAD = 0x0A;
private static final int HPROF_END_THREAD = 0x0B;
private static final int HPROF_HEAP_DUMP = 0x0C;
private static final int HPROF_CPU_SAMPLES = 0x0D;
private static final int HPROF_CONTROL_SETTINGS = 0x0E;
// 1.0.2 record types
private static final int HPROF_HEAP_DUMP_SEGMENT = 0x1C;
private static final int HPROF_HEAP_DUMP_END = 0x2C;
// Heap dump constants
// constants in enum HprofGcTag
private static final int HPROF_GC_ROOT_UNKNOWN = 0xFF;
private static final int HPROF_GC_ROOT_JNI_GLOBAL = 0x01;
private static final int HPROF_GC_ROOT_JNI_LOCAL = 0x02;
private static final int HPROF_GC_ROOT_JAVA_FRAME = 0x03;
private static final int HPROF_GC_ROOT_NATIVE_STACK = 0x04;
private static final int HPROF_GC_ROOT_STICKY_CLASS = 0x05;
private static final int HPROF_GC_ROOT_THREAD_BLOCK = 0x06;
private static final int HPROF_GC_ROOT_MONITOR_USED = 0x07;
private static final int HPROF_GC_ROOT_THREAD_OBJ = 0x08;
private static final int HPROF_GC_CLASS_DUMP = 0x20;
private static final int HPROF_GC_INSTANCE_DUMP = 0x21;
private static final int HPROF_GC_OBJ_ARRAY_DUMP = 0x22;
private static final int HPROF_GC_PRIM_ARRAY_DUMP = 0x23;
// constants in enum HprofType
private static final int HPROF_ARRAY_OBJECT = 1;
private static final int HPROF_NORMAL_OBJECT = 2;
private static final int HPROF_BOOLEAN = 4;
private static final int HPROF_CHAR = 5;
private static final int HPROF_FLOAT = 6;
private static final int HPROF_DOUBLE = 7;
private static final int HPROF_BYTE = 8;
private static final int HPROF_SHORT = 9;
private static final int HPROF_INT = 10;
private static final int HPROF_LONG = 11;
// Java type codes
private static final int JVM_SIGNATURE_BOOLEAN = 'Z';
private static final int JVM_SIGNATURE_CHAR = 'C';
private static final int JVM_SIGNATURE_BYTE = 'B';
private static final int JVM_SIGNATURE_SHORT = 'S';
private static final int JVM_SIGNATURE_INT = 'I';
private static final int JVM_SIGNATURE_LONG = 'J';
private static final int JVM_SIGNATURE_FLOAT = 'F';
private static final int JVM_SIGNATURE_DOUBLE = 'D';
private static final int JVM_SIGNATURE_ARRAY = '[';
private static final int JVM_SIGNATURE_CLASS = 'L';
public synchronized void write(String fileName) throws IOException {
// open file stream and create buffered data output stream
fos = new FileOutputStream(fileName);
out = new DataOutputStream(new BufferedOutputStream(fos));
VM vm = VM.getVM();
dbg = vm.getDebugger();
objectHeap = vm.getObjectHeap();
symTbl = vm.getSymbolTable();
OBJ_ID_SIZE = (int) vm.getOopSize();
BOOLEAN_BASE_OFFSET = TypeArray.baseOffsetInBytes(BasicType.T_BOOLEAN);
BYTE_BASE_OFFSET = TypeArray.baseOffsetInBytes(BasicType.T_BYTE);
CHAR_BASE_OFFSET = TypeArray.baseOffsetInBytes(BasicType.T_CHAR);
SHORT_BASE_OFFSET = TypeArray.baseOffsetInBytes(BasicType.T_SHORT);
INT_BASE_OFFSET = TypeArray.baseOffsetInBytes(BasicType.T_INT);
LONG_BASE_OFFSET = TypeArray.baseOffsetInBytes(BasicType.T_LONG);
FLOAT_BASE_OFFSET = TypeArray.baseOffsetInBytes(BasicType.T_FLOAT);
DOUBLE_BASE_OFFSET = TypeArray.baseOffsetInBytes(BasicType.T_DOUBLE);
OBJECT_BASE_OFFSET = TypeArray.baseOffsetInBytes(BasicType.T_OBJECT);
BOOLEAN_SIZE = objectHeap.getBooleanSize();
BYTE_SIZE = objectHeap.getByteSize();
CHAR_SIZE = objectHeap.getCharSize();
SHORT_SIZE = objectHeap.getShortSize();
INT_SIZE = objectHeap.getIntSize();
LONG_SIZE = objectHeap.getLongSize();
FLOAT_SIZE = objectHeap.getFloatSize();
DOUBLE_SIZE = objectHeap.getDoubleSize();
// Check weather we should dump the heap as segments
useSegmentedHeapDump = vm.getUniverse().heap().used() > HPROF_SEGMENTED_HEAP_DUMP_THRESHOLD;
// hprof bin format header
writeFileHeader();
// dummy stack trace without any frames so that
// HAT can be run without -stack false option
writeDummyTrace();
// hprof UTF-8 symbols section
writeSymbols();
// HPROF_LOAD_CLASS records for all classes
writeClasses();
// write CLASS_DUMP records
writeClassDumpRecords();
// this will write heap data into the buffer stream
super.write();
// flush buffer stream.
out.flush();
// Fill in final length
fillInHeapRecordLength();
if (useSegmentedHeapDump) {
// Write heap segment-end record
out.writeByte((byte) HPROF_HEAP_DUMP_END);
out.writeInt(0);
out.writeInt(0);
}
// flush buffer stream and throw it.
out.flush();
out = null;
// close the file stream
fos.close();
}
@Override
protected void writeHeapRecordPrologue() throws IOException {
if (currentSegmentStart == 0) {
// write heap data header, depending on heap size use segmented heap
// format
out.writeByte((byte) (useSegmentedHeapDump ? HPROF_HEAP_DUMP_SEGMENT
: HPROF_HEAP_DUMP));
out.writeInt(0);
// remember position of dump length, we will fixup
// length later - hprof format requires length.
out.flush();
currentSegmentStart = fos.getChannel().position();
// write dummy length of 0 and we'll fix it later.
out.writeInt(0);
}
}
@Override
protected void writeHeapRecordEpilogue() throws IOException {
if (useSegmentedHeapDump) {
out.flush();
if ((fos.getChannel().position() - currentSegmentStart - 4) >= HPROF_SEGMENTED_HEAP_DUMP_SEGMENT_SIZE) {
fillInHeapRecordLength();
currentSegmentStart = 0;
}
}
}
private void fillInHeapRecordLength() throws IOException {
// now get current position to calculate length
long dumpEnd = fos.getChannel().position();
// calculate length of heap data
long dumpLenLong = (dumpEnd - currentSegmentStart - 4L);
// Check length boundary, overflow could happen but is _very_ unlikely
if(dumpLenLong >= (4L * 0x40000000)){
throw new RuntimeException("Heap segment size overflow.");
}
// Save the current position
long currentPosition = fos.getChannel().position();
// seek the position to write length
fos.getChannel().position(currentSegmentStart);
int dumpLen = (int) dumpLenLong;
// write length as integer
fos.write((dumpLen >>> 24) & 0xFF);
fos.write((dumpLen >>> 16) & 0xFF);
fos.write((dumpLen >>> 8) & 0xFF);
fos.write((dumpLen >>> 0) & 0xFF);
//Reset to previous current position
fos.getChannel().position(currentPosition);
}
private void writeClassDumpRecords() throws IOException {
SystemDictionary sysDict = VM.getVM().getSystemDictionary();
try {
sysDict.allClassesDo(new SystemDictionary.ClassVisitor() {
public void visit(Klass k) {
try {
writeHeapRecordPrologue();
writeClassDumpRecord(k);
writeHeapRecordEpilogue();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
});
} catch (RuntimeException re) {
handleRuntimeException(re);
}
}
protected void writeClass(Instance instance) throws IOException {
Klass reflectedKlass = java_lang_Class.asKlass(instance);
// dump instance record only for primitive type Class objects.
// all other Class objects are covered by writeClassDumpRecords.
if (reflectedKlass == null) {
writeInstance(instance);
}
}
private void writeClassDumpRecord(Klass k) throws IOException {
out.writeByte((byte)HPROF_GC_CLASS_DUMP);
writeObjectID(k.getJavaMirror());
out.writeInt(DUMMY_STACK_TRACE_ID);
Klass superKlass = k.getJavaSuper();
if (superKlass != null) {
writeObjectID(superKlass.getJavaMirror());
} else {
writeObjectID(null);
}
if (k instanceof InstanceKlass) {
InstanceKlass ik = (InstanceKlass) k;
writeObjectID(ik.getClassLoader());
writeObjectID(null); // ik.getJavaMirror().getSigners());
writeObjectID(null); // ik.getJavaMirror().getProtectionDomain());
// two reserved id fields
writeObjectID(null);
writeObjectID(null);
List fields = getInstanceFields(ik);
int instSize = getSizeForFields(fields);
classDataCache.put(ik, new ClassData(instSize, fields));
out.writeInt(instSize);
// For now, ignore constant pool - HAT ignores too!
// output number of cp entries as zero.
out.writeShort((short) 0);
List declaredFields = ik.getImmediateFields();
List staticFields = new ArrayList();
List instanceFields = new ArrayList();
Iterator itr = null;
for (itr = declaredFields.iterator(); itr.hasNext();) {
Field field = (Field) itr.next();
if (field.isStatic()) {
staticFields.add(field);
} else {
instanceFields.add(field);
}
}
// dump static field descriptors
writeFieldDescriptors(staticFields, ik);
// dump instance field descriptors
writeFieldDescriptors(instanceFields, null);
} else {
if (k instanceof ObjArrayKlass) {
ObjArrayKlass oak = (ObjArrayKlass) k;
Klass bottomKlass = oak.getBottomKlass();
if (bottomKlass instanceof InstanceKlass) {
InstanceKlass ik = (InstanceKlass) bottomKlass;
writeObjectID(ik.getClassLoader());
writeObjectID(null); // ik.getJavaMirror().getSigners());
writeObjectID(null); // ik.getJavaMirror().getProtectionDomain());
} else {
writeObjectID(null);
writeObjectID(null);
writeObjectID(null);
}
} else {
writeObjectID(null);
writeObjectID(null);
writeObjectID(null);
}
// two reserved id fields
writeObjectID(null);
writeObjectID(null);
// write zero instance size -- as instance size
// is variable for arrays.
out.writeInt(0);
// no constant pool for array klasses
out.writeShort((short) 0);
// no static fields for array klasses
out.writeShort((short) 0);
// no instance fields for array klasses
out.writeShort((short) 0);
}
}
protected void writeJavaThread(JavaThread jt, int index) throws IOException {
out.writeByte((byte) HPROF_GC_ROOT_THREAD_OBJ);
writeObjectID(jt.getThreadObj());
out.writeInt(index);
out.writeInt(DUMMY_STACK_TRACE_ID);
writeLocalJNIHandles(jt, index);
}
protected void writeLocalJNIHandles(JavaThread jt, int index) throws IOException {
final int threadIndex = index;
JNIHandleBlock blk = jt.activeHandles();
if (blk != null) {
try {
blk.oopsDo(new AddressVisitor() {
public void visitAddress(Address handleAddr) {
try {
if (handleAddr != null) {
OopHandle oopHandle = handleAddr.getOopHandleAt(0);
Oop oop = objectHeap.newOop(oopHandle);
// exclude JNI handles hotspot internal objects
if (oop != null && isJavaVisible(oop)) {
out.writeByte((byte) HPROF_GC_ROOT_JNI_LOCAL);
writeObjectID(oop);
out.writeInt(threadIndex);
out.writeInt(EMPTY_FRAME_DEPTH);
}
}
} catch (IOException exp) {
throw new RuntimeException(exp);
}
}
public void visitCompOopAddress(Address handleAddr) {
throw new RuntimeException(
" Should not reach here. JNIHandles are not compressed \n");
}
});
} catch (RuntimeException re) {
handleRuntimeException(re);
}
}
}
protected void writeGlobalJNIHandle(Address handleAddr) throws IOException {
OopHandle oopHandle = handleAddr.getOopHandleAt(0);
Oop oop = objectHeap.newOop(oopHandle);
// exclude JNI handles of hotspot internal objects
if (oop != null && isJavaVisible(oop)) {
out.writeByte((byte) HPROF_GC_ROOT_JNI_GLOBAL);
writeObjectID(oop);
// use JNIHandle address as ID
writeObjectID(getAddressValue(handleAddr));
}
}
protected void writeObjectArray(ObjArray array) throws IOException {
out.writeByte((byte) HPROF_GC_OBJ_ARRAY_DUMP);
writeObjectID(array);
out.writeInt(DUMMY_STACK_TRACE_ID);
out.writeInt((int) array.getLength());
writeObjectID(array.getKlass().getJavaMirror());
final int length = (int) array.getLength();
for (int index = 0; index < length; index++) {
OopHandle handle = array.getOopHandleAt(index);
writeObjectID(getAddressValue(handle));
}
}
protected void writePrimitiveArray(TypeArray array) throws IOException {
out.writeByte((byte) HPROF_GC_PRIM_ARRAY_DUMP);
writeObjectID(array);
out.writeInt(DUMMY_STACK_TRACE_ID);
out.writeInt((int) array.getLength());
TypeArrayKlass tak = (TypeArrayKlass) array.getKlass();
final int type = (int) tak.getElementType();
out.writeByte((byte) type);
switch (type) {
case TypeArrayKlass.T_BOOLEAN:
writeBooleanArray(array);
break;
case TypeArrayKlass.T_CHAR:
writeCharArray(array);
break;
case TypeArrayKlass.T_FLOAT:
writeFloatArray(array);
break;
case TypeArrayKlass.T_DOUBLE:
writeDoubleArray(array);
break;
case TypeArrayKlass.T_BYTE:
writeByteArray(array);
break;
case TypeArrayKlass.T_SHORT:
writeShortArray(array);
break;
case TypeArrayKlass.T_INT:
writeIntArray(array);
break;
case TypeArrayKlass.T_LONG:
writeLongArray(array);
break;
default:
throw new RuntimeException("should not reach here");
}
}
private void writeBooleanArray(TypeArray array) throws IOException {
final int length = (int) array.getLength();
for (int index = 0; index < length; index++) {
long offset = BOOLEAN_BASE_OFFSET + index * BOOLEAN_SIZE;
out.writeBoolean(array.getHandle().getJBooleanAt(offset));
}
}
private void writeByteArray(TypeArray array) throws IOException {
final int length = (int) array.getLength();
for (int index = 0; index < length; index++) {
long offset = BYTE_BASE_OFFSET + index * BYTE_SIZE;
out.writeByte(array.getHandle().getJByteAt(offset));
}
}
private void writeShortArray(TypeArray array) throws IOException {
final int length = (int) array.getLength();
for (int index = 0; index < length; index++) {
long offset = SHORT_BASE_OFFSET + index * SHORT_SIZE;
out.writeShort(array.getHandle().getJShortAt(offset));
}
}
private void writeIntArray(TypeArray array) throws IOException {
final int length = (int) array.getLength();
for (int index = 0; index < length; index++) {
long offset = INT_BASE_OFFSET + index * INT_SIZE;
out.writeInt(array.getHandle().getJIntAt(offset));
}
}
private void writeLongArray(TypeArray array) throws IOException {
final int length = (int) array.getLength();
for (int index = 0; index < length; index++) {
long offset = LONG_BASE_OFFSET + index * LONG_SIZE;
out.writeLong(array.getHandle().getJLongAt(offset));
}
}
private void writeCharArray(TypeArray array) throws IOException {
final int length = (int) array.getLength();
for (int index = 0; index < length; index++) {
long offset = CHAR_BASE_OFFSET + index * CHAR_SIZE;
out.writeChar(array.getHandle().getJCharAt(offset));
}
}
private void writeFloatArray(TypeArray array) throws IOException {
final int length = (int) array.getLength();
for (int index = 0; index < length; index++) {
long offset = FLOAT_BASE_OFFSET + index * FLOAT_SIZE;
out.writeFloat(array.getHandle().getJFloatAt(offset));
}
}
private void writeDoubleArray(TypeArray array) throws IOException {
final int length = (int) array.getLength();
for (int index = 0; index < length; index++) {
long offset = DOUBLE_BASE_OFFSET + index * DOUBLE_SIZE;
out.writeDouble(array.getHandle().getJDoubleAt(offset));
}
}
protected void writeInstance(Instance instance) throws IOException {
out.writeByte((byte) HPROF_GC_INSTANCE_DUMP);
writeObjectID(instance);
out.writeInt(DUMMY_STACK_TRACE_ID);
Klass klass = instance.getKlass();
writeObjectID(klass.getJavaMirror());
ClassData cd = (ClassData) classDataCache.get(klass);
if (Assert.ASSERTS_ENABLED) {
Assert.that(cd != null, "can not get class data for " + klass.getName().asString() + klass.getAddress());
}
List fields = cd.fields;
int size = cd.instSize;
out.writeInt(size);
for (Iterator itr = fields.iterator(); itr.hasNext();) {
writeField((Field) itr.next(), instance);
}
}
//-- Internals only below this point
private void writeFieldDescriptors(List fields, InstanceKlass ik)
throws IOException {
// ik == null for instance fields.
out.writeShort((short) fields.size());
for (Iterator itr = fields.iterator(); itr.hasNext();) {
Field field = (Field) itr.next();
Symbol name = symTbl.probe(field.getID().getName());
writeSymbolID(name);
char typeCode = (char) field.getSignature().getByteAt(0);
int kind = signatureToHprofKind(typeCode);
out.writeByte((byte)kind);
if (ik != null) {
// static field
writeField(field, ik.getJavaMirror());
}
}
}
public static int signatureToHprofKind(char ch) {
switch (ch) {
case JVM_SIGNATURE_CLASS:
case JVM_SIGNATURE_ARRAY:
return HPROF_NORMAL_OBJECT;
case JVM_SIGNATURE_BOOLEAN:
return HPROF_BOOLEAN;
case JVM_SIGNATURE_CHAR:
return HPROF_CHAR;
case JVM_SIGNATURE_FLOAT:
return HPROF_FLOAT;
case JVM_SIGNATURE_DOUBLE:
return HPROF_DOUBLE;
case JVM_SIGNATURE_BYTE:
return HPROF_BYTE;
case JVM_SIGNATURE_SHORT:
return HPROF_SHORT;
case JVM_SIGNATURE_INT:
return HPROF_INT;
case JVM_SIGNATURE_LONG:
return HPROF_LONG;
default:
throw new RuntimeException("should not reach here");
}
}
private void writeField(Field field, Oop oop) throws IOException {
char typeCode = (char) field.getSignature().getByteAt(0);
switch (typeCode) {
case JVM_SIGNATURE_BOOLEAN:
out.writeBoolean(((BooleanField)field).getValue(oop));
break;
case JVM_SIGNATURE_CHAR:
out.writeChar(((CharField)field).getValue(oop));
break;
case JVM_SIGNATURE_BYTE:
out.writeByte(((ByteField)field).getValue(oop));
break;
case JVM_SIGNATURE_SHORT:
out.writeShort(((ShortField)field).getValue(oop));
break;
case JVM_SIGNATURE_INT:
out.writeInt(((IntField)field).getValue(oop));
break;
case JVM_SIGNATURE_LONG:
out.writeLong(((LongField)field).getValue(oop));
break;
case JVM_SIGNATURE_FLOAT:
out.writeFloat(((FloatField)field).getValue(oop));
break;
case JVM_SIGNATURE_DOUBLE:
out.writeDouble(((DoubleField)field).getValue(oop));
break;
case JVM_SIGNATURE_CLASS:
case JVM_SIGNATURE_ARRAY: {
if (VM.getVM().isCompressedOopsEnabled()) {
OopHandle handle = ((NarrowOopField)field).getValueAsOopHandle(oop);
writeObjectID(getAddressValue(handle));
} else {
OopHandle handle = ((OopField)field).getValueAsOopHandle(oop);
writeObjectID(getAddressValue(handle));
}
break;
}
default:
throw new RuntimeException("should not reach here");
}
}
private void writeHeader(int tag, int len) throws IOException {
out.writeByte((byte)tag);
out.writeInt(0); // current ticks
out.writeInt(len);
}
private void writeDummyTrace() throws IOException {
writeHeader(HPROF_TRACE, 3 * 4);
out.writeInt(DUMMY_STACK_TRACE_ID);
out.writeInt(0);
out.writeInt(0);
}
private void writeSymbols() throws IOException {
try {
symTbl.symbolsDo(new SymbolTable.SymbolVisitor() {
public void visit(Symbol sym) {
try {
writeSymbol(sym);
} catch (IOException exp) {
throw new RuntimeException(exp);
}
}
});
} catch (RuntimeException re) {
handleRuntimeException(re);
}
}
private void writeSymbol(Symbol sym) throws IOException {
byte[] buf = sym.asString().getBytes("UTF-8");
writeHeader(HPROF_UTF8, buf.length + OBJ_ID_SIZE);
writeSymbolID(sym);
out.write(buf);
}
private void writeClasses() throws IOException {
// write class list (id, name) association
SystemDictionary sysDict = VM.getVM().getSystemDictionary();
try {
sysDict.allClassesDo(new SystemDictionary.ClassVisitor() {
private int serialNum = 1;
public void visit(Klass k) {
try {
Instance clazz = k.getJavaMirror();
writeHeader(HPROF_LOAD_CLASS, 2 * (OBJ_ID_SIZE + 4));
out.writeInt(serialNum);
writeObjectID(clazz);
out.writeInt(DUMMY_STACK_TRACE_ID);
writeSymbolID(k.getName());
serialNum++;
} catch (IOException exp) {
throw new RuntimeException(exp);
}
}
});
} catch (RuntimeException re) {
handleRuntimeException(re);
}
}
// writes hprof binary file header
private void writeFileHeader() throws IOException {
// version string
if(useSegmentedHeapDump) {
out.writeBytes(HPROF_HEADER_1_0_2);
}
else {
out.writeBytes(HPROF_HEADER_1_0_1);
}
out.writeByte((byte)'\0');
// write identifier size. we use pointers as identifiers.
out.writeInt(OBJ_ID_SIZE);
// timestamp -- file creation time.
out.writeLong(System.currentTimeMillis());
}
// writes unique ID for an object
private void writeObjectID(Oop oop) throws IOException {
OopHandle handle = (oop != null)? oop.getHandle() : null;
long address = getAddressValue(handle);
writeObjectID(address);
}
private void writeSymbolID(Symbol sym) throws IOException {
writeObjectID(getAddressValue(sym.getAddress()));
}
private void writeObjectID(long address) throws IOException {
if (OBJ_ID_SIZE == 4) {
out.writeInt((int) address);
} else {
out.writeLong(address);
}
}
private long getAddressValue(Address addr) {
return (addr == null)? 0L : dbg.getAddressValue(addr);
}
// get all declared as well as inherited (directly/indirectly) fields
private static List/*<Field>*/ getInstanceFields(InstanceKlass ik) {
InstanceKlass klass = ik;
List res = new ArrayList();
while (klass != null) {
List curFields = klass.getImmediateFields();
for (Iterator itr = curFields.iterator(); itr.hasNext();) {
Field f = (Field) itr.next();
if (! f.isStatic()) {
res.add(f);
}
}
klass = (InstanceKlass) klass.getSuper();
}
return res;
}
// get size in bytes (in stream) required for given fields. Note
// that this is not the same as object size in heap. The size in
// heap will include size of padding/alignment bytes as well.
private int getSizeForFields(List fields) {
int size = 0;
for (Iterator itr = fields.iterator(); itr.hasNext();) {
Field field = (Field) itr.next();
char typeCode = (char) field.getSignature().getByteAt(0);
switch (typeCode) {
case JVM_SIGNATURE_BOOLEAN:
case JVM_SIGNATURE_BYTE:
size++;
break;
case JVM_SIGNATURE_CHAR:
case JVM_SIGNATURE_SHORT:
size += 2;
break;
case JVM_SIGNATURE_INT:
case JVM_SIGNATURE_FLOAT:
size += 4;
break;
case JVM_SIGNATURE_CLASS:
case JVM_SIGNATURE_ARRAY:
size += OBJ_ID_SIZE;
break;
case JVM_SIGNATURE_LONG:
case JVM_SIGNATURE_DOUBLE:
size += 8;
break;
default:
throw new RuntimeException("should not reach here");
}
}
return size;
}
// We don't have allocation site info. We write a dummy
// stack trace with this id.
private static final int DUMMY_STACK_TRACE_ID = 1;
private static final int EMPTY_FRAME_DEPTH = -1;
private DataOutputStream out;
private FileOutputStream fos;
private Debugger dbg;
private ObjectHeap objectHeap;
private SymbolTable symTbl;
// oopSize of the debuggee
private int OBJ_ID_SIZE;
// Added for hprof file format 1.0.2 support
private boolean useSegmentedHeapDump;
private long currentSegmentStart;
private long BOOLEAN_BASE_OFFSET;
private long BYTE_BASE_OFFSET;
private long CHAR_BASE_OFFSET;
private long SHORT_BASE_OFFSET;
private long INT_BASE_OFFSET;
private long LONG_BASE_OFFSET;
private long FLOAT_BASE_OFFSET;
private long DOUBLE_BASE_OFFSET;
private long OBJECT_BASE_OFFSET;
private long BOOLEAN_SIZE;
private long BYTE_SIZE;
private long CHAR_SIZE;
private long SHORT_SIZE;
private long INT_SIZE;
private long LONG_SIZE;
private long FLOAT_SIZE;
private long DOUBLE_SIZE;
private static class ClassData {
int instSize;
List fields;
ClassData(int instSize, List fields) {
this.instSize = instSize;
this.fields = fields;
}
}
private Map classDataCache = new HashMap(); // <InstanceKlass, ClassData>
}
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