LLVM  10.0.0svn
BlockIndexer.h
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1 //===- BlockIndexer.h - FDR Block Indexing Visitor ------------------------===//
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 // An implementation of the RecordVisitor which generates a mapping between a
10 // thread and a range of records representing a block.
11 //
12 //===----------------------------------------------------------------------===//
13 #ifndef LLVM_LIB_XRAY_BLOCKINDEXER_H_
14 #define LLVM_LIB_XRAY_BLOCKINDEXER_H_
15 
16 #include "llvm/ADT/DenseMap.h"
17 #include "llvm/XRay/FDRRecords.h"
18 #include <cstdint>
19 #include <vector>
20 
21 namespace llvm {
22 namespace xray {
23 
24 // The BlockIndexer will gather all related records associated with a
25 // process+thread and group them by 'Block'.
26 class BlockIndexer : public RecordVisitor {
27 public:
28  struct Block {
29  uint64_t ProcessID;
30  int32_t ThreadID;
32  std::vector<Record *> Records;
33  };
34 
35  // This maps the process + thread combination to a sequence of blocks.
36  using Index = DenseMap<std::pair<uint64_t, int32_t>, std::vector<Block>>;
37 
38 private:
39  Index &Indices;
40 
41  Block CurrentBlock{0, 0, nullptr, {}};
42 
43 public:
44  explicit BlockIndexer(Index &I) : RecordVisitor(), Indices(I) {}
45 
46  Error visit(BufferExtents &) override;
47  Error visit(WallclockRecord &) override;
48  Error visit(NewCPUIDRecord &) override;
49  Error visit(TSCWrapRecord &) override;
50  Error visit(CustomEventRecord &) override;
51  Error visit(CallArgRecord &) override;
52  Error visit(PIDRecord &) override;
53  Error visit(NewBufferRecord &) override;
54  Error visit(EndBufferRecord &) override;
55  Error visit(FunctionRecord &) override;
56  Error visit(CustomEventRecordV5 &) override;
57  Error visit(TypedEventRecord &) override;
58 
59  /// The flush() function will clear out the current state of the visitor, to
60  /// allow for explicitly flushing a block's records to the currently
61  /// recognized thread and process combination.
62  Error flush();
63 };
64 
65 } // namespace xray
66 } // namespace llvm
67 
68 #endif // LLVM_LIB_XRAY_BLOCKINDEXER_H_
This class represents lattice values for constants.
Definition: AllocatorList.h:23
WallclockRecord * WallclockTime
Definition: BlockIndexer.h:31
Error visit(BufferExtents &) override
std::vector< Record * > Records
Definition: BlockIndexer.h:32
Error flush()
The flush() function will clear out the current state of the visitor, to allow for explicitly flushin...
#define I(x, y, z)
Definition: MD5.cpp:58
Lightweight error class with error context and mandatory checking.
Definition: Error.h:157