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      1 #include "llvm/DebugInfo/PDB/Native/RawError.h"
      2 #include "llvm/Support/ErrorHandling.h"
      3 #include "llvm/Support/ManagedStatic.h"
      4 
      5 using namespace llvm;
      6 using namespace llvm::pdb;
      7 
      8 namespace {
      9 // FIXME: This class is only here to support the transition to llvm::Error. It
     10 // will be removed once this transition is complete. Clients should prefer to
     11 // deal with the Error value directly, rather than converting to error_code.
     12 class RawErrorCategory : public std::error_category {
     13 public:
     14   const char *name() const noexcept override { return "llvm.pdb.raw"; }
     15 
     16   std::string message(int Condition) const override {
     17     switch (static_cast<raw_error_code>(Condition)) {
     18     case raw_error_code::unspecified:
     19       return "An unknown error has occurred.";
     20     case raw_error_code::feature_unsupported:
     21       return "The feature is unsupported by the implementation.";
     22     case raw_error_code::invalid_format:
     23       return "The record is in an unexpected format.";
     24     case raw_error_code::corrupt_file:
     25       return "The PDB file is corrupt.";
     26     case raw_error_code::insufficient_buffer:
     27       return "The buffer is not large enough to read the requested number of "
     28              "bytes.";
     29     case raw_error_code::no_stream:
     30       return "The specified stream could not be loaded.";
     31     case raw_error_code::index_out_of_bounds:
     32       return "The specified item does not exist in the array.";
     33     case raw_error_code::invalid_block_address:
     34       return "The specified block address is not valid.";
     35     case raw_error_code::duplicate_entry:
     36       return "The entry already exists.";
     37     case raw_error_code::no_entry:
     38       return "The entry does not exist.";
     39     case raw_error_code::not_writable:
     40       return "The PDB does not support writing.";
     41     case raw_error_code::stream_too_long:
     42       return "The stream was longer than expected.";
     43     case raw_error_code::invalid_tpi_hash:
     44       return "The Type record has an invalid hash value.";
     45     }
     46     llvm_unreachable("Unrecognized raw_error_code");
     47   }
     48 };
     49 } // end anonymous namespace
     50 
     51 static ManagedStatic<RawErrorCategory> Category;
     52 
     53 char RawError::ID = 0;
     54 
     55 RawError::RawError(raw_error_code C) : RawError(C, "") {}
     56 
     57 RawError::RawError(const std::string &Context)
     58     : RawError(raw_error_code::unspecified, Context) {}
     59 
     60 RawError::RawError(raw_error_code C, const std::string &Context) : Code(C) {
     61   ErrMsg = "Native PDB Error: ";
     62   std::error_code EC = convertToErrorCode();
     63   if (Code != raw_error_code::unspecified)
     64     ErrMsg += EC.message() + "  ";
     65   if (!Context.empty())
     66     ErrMsg += Context;
     67 }
     68 
     69 void RawError::log(raw_ostream &OS) const { OS << ErrMsg << "\n"; }
     70 
     71 const std::string &RawError::getErrorMessage() const { return ErrMsg; }
     72 
     73 std::error_code RawError::convertToErrorCode() const {
     74   return std::error_code(static_cast<int>(Code), *Category);
     75 }
     76