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  1. //===-- LookupAndRecordAddrs.h - Symbol lookup support utility --*- 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. // Record the addresses of a set of symbols into ExecutorAddr objects.
  10. //
  11. // This can be used to avoid repeated lookup (via ExecutionSession::lookup) of
  12. // the given symbols.
  13. //
  14. //===----------------------------------------------------------------------===//
  15.  
  16. #ifndef LLVM_EXECUTIONENGINE_ORC_LOOKUPANDRECORDADDRS_H
  17. #define LLVM_EXECUTIONENGINE_ORC_LOOKUPANDRECORDADDRS_H
  18.  
  19. #include "llvm/ADT/FunctionExtras.h"
  20. #include "llvm/ExecutionEngine/Orc/Core.h"
  21. #include "llvm/ExecutionEngine/Orc/Shared/ExecutorAddress.h"
  22.  
  23. #include <vector>
  24.  
  25. namespace llvm {
  26. namespace orc {
  27.  
  28. /// Record addresses of the given symbols in the given ExecutorAddrs.
  29. ///
  30. /// Useful for making permanent records of symbol addreses to call or
  31. /// access in the executor (e.g. runtime support functions in Platform
  32. /// subclasses).
  33. ///
  34. /// By default the symbols are looked up using
  35. /// SymbolLookupFlags::RequiredSymbol, and an error will be generated if any of
  36. /// the requested symbols are not defined.
  37. ///
  38. /// If SymbolLookupFlags::WeaklyReferencedSymbol is used then any missing
  39. /// symbols will have their corresponding address objects set to zero, and
  40. /// this function will never generate an error (the caller will need to check
  41. /// addresses before using them).
  42. ///
  43. /// Asynchronous version.
  44. void lookupAndRecordAddrs(
  45.     unique_function<void(Error)> OnRecorded, ExecutionSession &ES, LookupKind K,
  46.     const JITDylibSearchOrder &SearchOrder,
  47.     std::vector<std::pair<SymbolStringPtr, ExecutorAddr *>> Pairs,
  48.     SymbolLookupFlags LookupFlags = SymbolLookupFlags::RequiredSymbol);
  49.  
  50. /// Record addresses of the given symbols in the given ExecutorAddrs.
  51. ///
  52. /// Blocking version.
  53. Error lookupAndRecordAddrs(
  54.     ExecutionSession &ES, LookupKind K, const JITDylibSearchOrder &SearchOrder,
  55.     std::vector<std::pair<SymbolStringPtr, ExecutorAddr *>> Pairs,
  56.     SymbolLookupFlags LookupFlags = SymbolLookupFlags::RequiredSymbol);
  57.  
  58. /// Record addresses of given symbols in the given ExecutorAddrs.
  59. ///
  60. /// ExecutorProcessControl lookup version. Lookups are always implicitly
  61. /// weak.
  62. Error lookupAndRecordAddrs(
  63.     ExecutorProcessControl &EPC, tpctypes::DylibHandle H,
  64.     std::vector<std::pair<SymbolStringPtr, ExecutorAddr *>> Pairs,
  65.     SymbolLookupFlags LookupFlags = SymbolLookupFlags::RequiredSymbol);
  66.  
  67. } // End namespace orc
  68. } // End namespace llvm
  69.  
  70. #endif // LLVM_EXECUTIONENGINE_ORC_LOOKUPANDRECORDADDRS_H
  71.