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A common pattern in Windows is to have all your precompiled headers use an object named stdafx.obj. If you've got a project with many different static libs, you might use a separate PCH for each one of these. During the final link step, a file from A might reference the PCH object from A, but it will have the same name (stdafx.obj) as any other PCH from another project. The only difference will be the path. For example, A might be A/stdafx.obj while B is B/stdafx.obj. The existing algorithm checks only the filename that was passed on the command line (or stored in archive), but this is insufficient in the case where relative paths are used, because depending on the command line object file / library order, it might find the wrong PCH object first resulting in a signature mismatch. The fix here is to simply check whether the absolute path of the PCH object (which is stored in the input obj file for the file that references the PCH) *ends with* the full relative path of whatever is specified on the command line (or is in the archive). Differential Revision: https://reviews.llvm.org/D66431 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@374442 91177308-0d34-0410-b5e6-96231b3b80d8
52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
//===- GenericError.h - system_error extensions for PDB ---------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_DEBUGINFO_PDB_ERROR_H
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#define LLVM_DEBUGINFO_PDB_ERROR_H
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/Error.h"
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namespace llvm {
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namespace pdb {
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enum class pdb_error_code {
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invalid_utf8_path = 1,
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dia_sdk_not_present,
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dia_failed_loading,
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signature_out_of_date,
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no_matching_pch,
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unspecified,
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};
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} // namespace pdb
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} // namespace llvm
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namespace std {
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template <>
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struct is_error_code_enum<llvm::pdb::pdb_error_code> : std::true_type {};
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} // namespace std
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namespace llvm {
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namespace pdb {
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const std::error_category &PDBErrCategory();
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inline std::error_code make_error_code(pdb_error_code E) {
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return std::error_code(static_cast<int>(E), PDBErrCategory());
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}
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/// Base class for errors originating when parsing raw PDB files
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class PDBError : public ErrorInfo<PDBError, StringError> {
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public:
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using ErrorInfo<PDBError, StringError>::ErrorInfo; // inherit constructors
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PDBError(const Twine &S) : ErrorInfo(S, pdb_error_code::unspecified) {}
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static char ID;
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};
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} // namespace pdb
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} // namespace llvm
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#endif
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