private object ReadType(CtfStruct strct, object[] result, CtfMetadataType type) { Align(type.Align); switch (type.CtfType) { case CtfTypes.Array: CtfArray array = (CtfArray)type; int len = array.GetLength(strct, result); object[] ret = new object[len]; for (int j = 0; j < len; j++) { ret[j] = ReadType(null, null, array.Type); } return(ret); case CtfTypes.Enum: return(ReadType(strct, result, ((CtfEnum)type).Type)); case CtfTypes.Float: CtfFloat flt = (CtfFloat)type; ReadBits(flt.Exp + flt.Mant); return(0f); // TODO: Not implemented. case CtfTypes.Integer: CtfInteger ctfInt = (CtfInteger)type; return(ReadInteger(ctfInt)); case CtfTypes.String: bool ascii = ((CtfString)type).IsAscii; return(ReadString(ascii)); case CtfTypes.Struct: return(ReadStruct((CtfStruct)type)); case CtfTypes.Variant: CtfVariant var = (CtfVariant)type; int i = strct.GetFieldIndex(var.Switch); CtfField field = strct.Fields[i]; CtfEnum enumType = (CtfEnum)field.Type; int value = strct.GetFieldValue <int>(result, i); string name = enumType.GetName(value); field = var.Union.Where(f => f.Name == name).Single(); return(ReadType(strct, result, field.Type)); default: throw new InvalidOperationException(); } }
public void ReadTypeIntoBuffer(CtfStruct context, CtfMetadataType type) { Align(type.Align); type.BitOffset = _bitOffset; if (type.CtfType == CtfTypes.Enum) { type = ((CtfEnum)type).Type; type.BitOffset = _bitOffset; } else if (type.CtfType != CtfTypes.Struct && type.CtfType != CtfTypes.Variant) { int size = type.GetSize(); if (size != CtfEvent.SizeIndeterminate) { ReadBits(size); return; } } switch (type.CtfType) { case CtfTypes.Array: CtfArray array = (CtfArray)type; var indexType = context.GetField(array.Index).Type; int len = CtfInteger.ReadInt <int>(indexType, _buffer, indexType.BitOffset); int elemSize = array.Type.GetSize(); if (elemSize == CtfEvent.SizeIndeterminate) { for (int j = 0; j < len; j++) { ReadTypeIntoBuffer(null, array.Type); } } else { for (int j = 0; j < len; j++) { Align(type.Align); ReadBits(elemSize); } } break; case CtfTypes.Float: CtfFloat flt = (CtfFloat)type; ReadBits(flt.Exp + flt.Mant); break; case CtfTypes.Integer: CtfInteger ctfInt = (CtfInteger)type; ReadBits(ctfInt.Size); break; case CtfTypes.String: Debug.Assert((_bitOffset % 8) == 0); int startOffset = _bitOffset >> 3; int offset = startOffset; ReadBits(8); bool ascii = ((CtfString)type).IsAscii; if (ascii) { while (_buffer[offset++] != 0) { ReadBits(8); } } else { byte b = _buffer[offset]; while (b != 0) { switch (b) { default: break; case 0xc: case 0xd: ReadBits(8); break; case 0xe: ReadBits(16); break; case 0xf: ReadBits(24); break; } offset = ReadBits(8) >> 3; b = _buffer[offset]; } } int bufferLen = (_bitOffset >> 3) - startOffset; Encoding encoding = ascii ? Encoding.ASCII : Encoding.UTF8; byte[] newArr = Encoding.Convert(encoding, Encoding.Unicode, _buffer, startOffset, bufferLen); ((CtfString)type).Length = bufferLen; if (_buffer.Length < _bufferLength + newArr.Length) { byte[] buffer = ReallocateBuffer(_bufferLength + newArr.Length); System.Buffer.BlockCopy(buffer, 0, _buffer, 0, _bufferLength); } System.Buffer.BlockCopy(newArr, 0, _buffer, startOffset, newArr.Length); _bufferLength = startOffset + newArr.Length; _bitOffset = _bufferLength * 8; break; case CtfTypes.Struct: ReadStruct((CtfStruct)type); break; case CtfTypes.Variant: CtfVariant var = (CtfVariant)type; CtfField field = context.GetField(var.Switch); CtfEnum enumType = (CtfEnum)field.Type; int value = CtfInteger.ReadInt <int>(enumType, _buffer, enumType.BitOffset); string name = enumType.GetName(value); field = var.GetVariant(name); ReadTypeIntoBuffer(null, field.Type); break; default: throw new InvalidOperationException(); } }
public IEnumerable <CtfEventHeader> EnumerateEventHeaders() { CtfStruct header = _streamDefinition.EventHeader; CtfVariant v = (CtfVariant)header.GetField("v").Type; CtfStruct extended = (CtfStruct)v.GetVariant("extended").Type; CtfStruct compact = (CtfStruct)v.GetVariant("compact").Type; ulong lowMask = 0, highMask = 0, overflowBit = 0; ulong lastTimestamp = 0; StringBuilder processName = new StringBuilder(); while (!_eof) { if (_readHeader) { throw new InvalidOperationException("Must read an events data before reading the header again."); } _header.Clear(); ResetBuffer(); object[] result = ReadStruct(header); if (_eof) { break; } ulong timestamp; CtfEnum en = (CtfEnum)header.GetField("id").Type; uint event_id = header.GetFieldValue <uint>(result, "id"); result = header.GetFieldValue <object[]>(result, "v"); if (en.GetName((int)event_id) == "extended") { event_id = extended.GetFieldValue <uint>(result, "id"); timestamp = extended.GetFieldValue <ulong>(result, "timestamp"); } else { if (overflowBit == 0) { CtfInteger compactTimestamp = (CtfInteger)compact.GetField("timestamp").Type; overflowBit = (1ul << compactTimestamp.Size); lowMask = overflowBit - 1; highMask = ~lowMask; } ulong uint27timestamp = compact.GetFieldValue <ulong>(result, "timestamp"); ulong prevLowerBits = lastTimestamp & lowMask; if (prevLowerBits < uint27timestamp) { timestamp = (lastTimestamp & highMask) | uint27timestamp; } else { timestamp = (lastTimestamp & highMask) | uint27timestamp; timestamp += overflowBit; } } lastTimestamp = timestamp; CtfEvent evt = _streamDefinition.Events[(int)event_id]; _header.Event = evt; _header.Timestamp = timestamp; CtfStruct eventContext = _streamDefinition.EventContext; if (eventContext != null) { result = ReadStruct(eventContext); _header.Pid = eventContext.GetFieldValue <int>(result, "_vpid"); _header.Tid = eventContext.GetFieldValue <int>(result, "_vtid"); int procnameIndex = eventContext.GetFieldIndex("_procname"); object[] procname = (object[])(result[procnameIndex]); processName.Clear(); for (int i = 0; i < 17; i++) { sbyte b = (sbyte)procname[i]; if (b == 0) { break; } processName.Append((char)b); } _header.ProcessName = processName.ToString(); } _readHeader = true; yield return(_header); } }