private void readHeapDump(long bytesLeft, long posAtEnd) throws IOException {
while (bytesLeft > 0) {
int type = in.readUnsignedByte();
if (debugLevel > 0) {
System.out.println(
" Read heap sub-record type "
+ type
+ " at position "
+ toHex(posAtEnd - bytesLeft));
}
bytesLeft--;
switch (type) {
case HPROF_GC_ROOT_UNKNOWN:
{
long id = readID();
bytesLeft -= identifierSize;
snapshot.addRoot(new Root(id, 0, Root.UNKNOWN, ""));
break;
}
case HPROF_GC_ROOT_THREAD_OBJ:
{
long id = readID();
int threadSeq = in.readInt();
int stackSeq = in.readInt();
bytesLeft -= identifierSize + 8;
threadObjects.put(new Integer(threadSeq), new ThreadObject(id, stackSeq));
break;
}
case HPROF_GC_ROOT_JNI_GLOBAL:
{
long id = readID();
long globalRefId = readID(); // Ignored, for now
bytesLeft -= 2 * identifierSize;
snapshot.addRoot(new Root(id, 0, Root.NATIVE_STATIC, ""));
break;
}
case HPROF_GC_ROOT_JNI_LOCAL:
{
long id = readID();
int threadSeq = in.readInt();
int depth = in.readInt();
bytesLeft -= identifierSize + 8;
ThreadObject to = getThreadObjectFromSequence(threadSeq);
StackTrace st = getStackTraceFromSerial(to.stackSeq);
if (st != null) {
st = st.traceForDepth(depth + 1);
}
snapshot.addRoot(new Root(id, to.threadId, Root.NATIVE_LOCAL, "", st));
break;
}
case HPROF_GC_ROOT_JAVA_FRAME:
{
long id = readID();
int threadSeq = in.readInt();
int depth = in.readInt();
bytesLeft -= identifierSize + 8;
ThreadObject to = getThreadObjectFromSequence(threadSeq);
StackTrace st = getStackTraceFromSerial(to.stackSeq);
if (st != null) {
st = st.traceForDepth(depth + 1);
}
snapshot.addRoot(new Root(id, to.threadId, Root.JAVA_LOCAL, "", st));
break;
}
case HPROF_GC_ROOT_NATIVE_STACK:
{
long id = readID();
int threadSeq = in.readInt();
bytesLeft -= identifierSize + 4;
ThreadObject to = getThreadObjectFromSequence(threadSeq);
StackTrace st = getStackTraceFromSerial(to.stackSeq);
snapshot.addRoot(new Root(id, to.threadId, Root.NATIVE_STACK, "", st));
break;
}
case HPROF_GC_ROOT_STICKY_CLASS:
{
long id = readID();
bytesLeft -= identifierSize;
snapshot.addRoot(new Root(id, 0, Root.SYSTEM_CLASS, ""));
break;
}
case HPROF_GC_ROOT_THREAD_BLOCK:
{
long id = readID();
int threadSeq = in.readInt();
bytesLeft -= identifierSize + 4;
ThreadObject to = getThreadObjectFromSequence(threadSeq);
StackTrace st = getStackTraceFromSerial(to.stackSeq);
snapshot.addRoot(new Root(id, to.threadId, Root.THREAD_BLOCK, "", st));
break;
}
case HPROF_GC_ROOT_MONITOR_USED:
{
long id = readID();
bytesLeft -= identifierSize;
snapshot.addRoot(new Root(id, 0, Root.BUSY_MONITOR, ""));
break;
}
case HPROF_GC_CLASS_DUMP:
{
int bytesRead = readClass();
bytesLeft -= bytesRead;
break;
}
case HPROF_GC_INSTANCE_DUMP:
{
int bytesRead = readInstance();
bytesLeft -= bytesRead;
break;
}
case HPROF_GC_OBJ_ARRAY_DUMP:
{
int bytesRead = readArray(false);
bytesLeft -= bytesRead;
break;
}
case HPROF_GC_PRIM_ARRAY_DUMP:
{
int bytesRead = readArray(true);
bytesLeft -= bytesRead;
break;
}
default:
{
throw new IOException("Unrecognized heap dump sub-record type: " + type);
}
}
}
if (bytesLeft != 0) {
warn(
"Error reading heap dump or heap dump segment: Byte count is "
+ bytesLeft
+ " instead of 0");
skipBytes(bytesLeft);
}
if (debugLevel > 0) {
System.out.println(" Finished heap sub-records.");
}
}
