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0f81feda8a
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 llvm-svn: 374442
49 lines
2.0 KiB
C++
49 lines
2.0 KiB
C++
//===- Error.cpp - 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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#include "llvm/DebugInfo/PDB/GenericError.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/ManagedStatic.h"
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using namespace llvm;
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using namespace llvm::pdb;
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namespace {
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// FIXME: This class is only here to support the transition to llvm::Error. It
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// will be removed once this transition is complete. Clients should prefer to
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// deal with the Error value directly, rather than converting to error_code.
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class PDBErrorCategory : public std::error_category {
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public:
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const char *name() const noexcept override { return "llvm.pdb"; }
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std::string message(int Condition) const override {
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switch (static_cast<pdb_error_code>(Condition)) {
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case pdb_error_code::unspecified:
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return "An unknown error has occurred.";
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case pdb_error_code::dia_sdk_not_present:
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return "LLVM was not compiled with support for DIA. This usually means "
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"that you are not using MSVC, or your Visual Studio "
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"installation is corrupt.";
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case pdb_error_code::dia_failed_loading:
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return "DIA is only supported when using MSVC.";
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case pdb_error_code::invalid_utf8_path:
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return "The PDB file path is an invalid UTF8 sequence.";
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case pdb_error_code::signature_out_of_date:
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return "The signature does not match; the file(s) might be out of date.";
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case pdb_error_code::no_matching_pch:
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return "No matching precompiled header could be located.";
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}
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llvm_unreachable("Unrecognized generic_error_code");
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}
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};
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} // namespace
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static llvm::ManagedStatic<PDBErrorCategory> PDBCategory;
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const std::error_category &llvm::pdb::PDBErrCategory() { return *PDBCategory; }
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char PDBError::ID;
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