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  1. //===- FDRTraceWriter.h - XRay FDR Trace Writer -----------------*- C++ -*-===//
  2. //
  3. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  4. // See https://llvm.org/LICENSE.txt for license information.
  5. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  6. //
  7. //===----------------------------------------------------------------------===//
  8. //
  9. // Test a utility that can write out XRay FDR Mode formatted trace files.
  10. //
  11. //===----------------------------------------------------------------------===//
  12. #ifndef LLVM_XRAY_FDRTRACEWRITER_H
  13. #define LLVM_XRAY_FDRTRACEWRITER_H
  14.  
  15. #include "llvm/Support/raw_ostream.h"
  16. #include "llvm/Support/EndianStream.h"
  17. #include "llvm/XRay/FDRRecords.h"
  18. #include "llvm/XRay/XRayRecord.h"
  19.  
  20. namespace llvm {
  21. namespace xray {
  22.  
  23. /// The FDRTraceWriter allows us to hand-craft an XRay Flight Data Recorder
  24. /// (FDR) mode log file. This is used primarily for testing, generating
  25. /// sequences of FDR records that can be read/processed. It can also be used to
  26. /// generate various kinds of execution traces without using the XRay runtime.
  27. /// Note that this writer does not do any validation, but uses the types of
  28. /// records defined in the FDRRecords.h file.
  29. class FDRTraceWriter : public RecordVisitor {
  30. public:
  31.   // Construct an FDRTraceWriter associated with an output stream.
  32.   explicit FDRTraceWriter(raw_ostream &O, const XRayFileHeader &H);
  33.   ~FDRTraceWriter();
  34.  
  35.   Error visit(BufferExtents &) override;
  36.   Error visit(WallclockRecord &) override;
  37.   Error visit(NewCPUIDRecord &) override;
  38.   Error visit(TSCWrapRecord &) override;
  39.   Error visit(CustomEventRecord &) override;
  40.   Error visit(CallArgRecord &) override;
  41.   Error visit(PIDRecord &) override;
  42.   Error visit(NewBufferRecord &) override;
  43.   Error visit(EndBufferRecord &) override;
  44.   Error visit(FunctionRecord &) override;
  45.   Error visit(CustomEventRecordV5 &) override;
  46.   Error visit(TypedEventRecord &) override;
  47.  
  48. private:
  49.   support::endian::Writer OS;
  50. };
  51.  
  52. } // namespace xray
  53. } // namespace llvm
  54.  
  55. #endif // LLVM_XRAY_FDRTRACEWRITER_H
  56.