1//===- FDRTraceExpander.h - XRay FDR Mode Log Expander --------------------===//
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// We define an FDR record visitor which can re-constitute XRayRecord instances
10// from a sequence of FDR mode records in arrival order into a collection.
11//
12//===----------------------------------------------------------------------===//
13#ifndef LLVM_XRAY_FDRTRACEEXPANDER_H
14#define LLVM_XRAY_FDRTRACEEXPANDER_H
15
16#include "llvm/ADT/STLExtras.h"
17#include "llvm/XRay/FDRRecords.h"
18#include "llvm/XRay/XRayRecord.h"
19
20namespace llvm {
21namespace xray {
22
23class TraceExpander : public RecordVisitor {
24 // Type-erased callback for handling individual XRayRecord instances.
25 function_ref<void(const XRayRecord &)> C;
26 int32_t PID = 0;
27 int32_t TID = 0;
28 uint64_t BaseTSC = 0;
29 XRayRecord CurrentRecord{.RecordType: 0, .CPU: 0, .Type: RecordTypes::ENTER, .FuncId: 0, .TSC: 0, .TId: 0, .PId: 0, .CallArgs: {}, .Data: {}};
30 uint16_t CPUId = 0;
31 uint16_t LogVersion = 0;
32 bool BuildingRecord = false;
33 bool IgnoringRecords = false;
34
35 void resetCurrentRecord();
36
37public:
38 explicit TraceExpander(function_ref<void(const XRayRecord &)> F, uint16_t L)
39 : C(std::move(F)), LogVersion(L) {}
40
41 Error visit(BufferExtents &) override;
42 Error visit(WallclockRecord &) override;
43 Error visit(NewCPUIDRecord &) override;
44 Error visit(TSCWrapRecord &) override;
45 Error visit(CustomEventRecord &) override;
46 Error visit(CallArgRecord &) override;
47 Error visit(PIDRecord &) override;
48 Error visit(NewBufferRecord &) override;
49 Error visit(EndBufferRecord &) override;
50 Error visit(FunctionRecord &) override;
51 Error visit(CustomEventRecordV5 &) override;
52 Error visit(TypedEventRecord &) override;
53
54 // Must be called after all the records have been processed, to handle the
55 // most recent record generated.
56 Error flush();
57};
58
59} // namespace xray
60} // namespace llvm
61
62#endif // LLVM_XRAY_FDRTRACEEXPANDER_H
63

source code of llvm/include/llvm/XRay/FDRTraceExpander.h