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//===- BlockVerifier.h - FDR Block Verifier -------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// An implementation of the RecordVisitor which verifies a sequence of records
// associated with a block, following the FDR mode log format's specifications.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_XRAY_BLOCKVERIFIER_H
#define LLVM_XRAY_BLOCKVERIFIER_H
#include "llvm/XRay/FDRRecords.h"
namespace llvm {
namespace xray {
class BlockVerifier : public RecordVisitor {
public:
// We force State elements to be size_t, to be used as indices for containers.
enum class State : std::size_t {
Unknown,
BufferExtents,
NewBuffer,
WallClockTime,
PIDEntry,
NewCPUId,
TSCWrap,
CustomEvent,
TypedEvent,
Function,
CallArg,
EndOfBuffer,
StateMax,
};
private:
// We keep track of the current record seen by the verifier.
State CurrentRecord = State::Unknown;
// Transitions the current record to the new record, records an error on
// invalid transitions.
Error transition(State To);
public:
Error visit(BufferExtents &) override;
Error visit(WallclockRecord &) override;
Error visit(NewCPUIDRecord &) override;
Error visit(TSCWrapRecord &) override;
Error visit(CustomEventRecord &) override;
Error visit(CallArgRecord &) override;
Error visit(PIDRecord &) override;
Error visit(NewBufferRecord &) override;
Error visit(EndBufferRecord &) override;
Error visit(FunctionRecord &) override;
Error visit(CustomEventRecordV5 &) override;
Error visit(TypedEventRecord &) override;
Error verify();
void reset();
};
} // namespace xray
} // namespace llvm
#endif // LLVM_XRAY_BLOCKVERIFIER_H
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