1 //===- func-id-helper.h - XRay Function ID Conversion Helpers -------------===//
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 // Defines helper tools dealing with XRay-generated function ids.
10 //
11 //===----------------------------------------------------------------------===//
12 #ifndef LLVM_TOOLS_LLVM_XRAY_FUNC_ID_HELPER_H
13 #define LLVM_TOOLS_LLVM_XRAY_FUNC_ID_HELPER_H
14 
15 #include "llvm/ADT/DenseMap.h"
16 #include "llvm/DebugInfo/Symbolize/SymbolizableModule.h"
17 #include "llvm/DebugInfo/Symbolize/Symbolize.h"
18 #include <unordered_map>
19 
20 namespace llvm {
21 namespace xray {
22 
23 // This class consolidates common operations related to Function IDs.
24 class FuncIdConversionHelper {
25 public:
26   using FunctionAddressMap = std::unordered_map<int32_t, uint64_t>;
27 
28 private:
29   std::string BinaryInstrMap;
30   symbolize::LLVMSymbolizer &Symbolizer;
31   const FunctionAddressMap &FunctionAddresses;
32   mutable llvm::DenseMap<int32_t, std::string> CachedNames;
33 
34 public:
35   FuncIdConversionHelper(std::string BinaryInstrMap,
36                          symbolize::LLVMSymbolizer &Symbolizer,
37                          const FunctionAddressMap &FunctionAddresses)
38       : BinaryInstrMap(std::move(BinaryInstrMap)), Symbolizer(Symbolizer),
39         FunctionAddresses(FunctionAddresses) {}
40 
41   // Returns the symbol or a string representation of the function id.
42   std::string SymbolOrNumber(int32_t FuncId) const;
43 
44   // Returns the file and column from debug info for the given function id.
45   std::string FileLineAndColumn(int32_t FuncId) const;
46 };
47 
48 } // namespace xray
49 } // namespace llvm
50 
51 #endif // LLVM_TOOLS_LLVM_XRAY_FUNC_ID_HELPER_H
52