bac69d33d0
This provides a better layering of responsibilities among different aspects of PDB writing code. Some of the MSF related code was contained in CodeView, and some was in PDB prior to this. Further, we were often saying PDB when we meant MSF, and the two are actually independent of each other since in theory you can have other types of data besides PDB data in an MSF. So, this patch separates the MSF specific code into its own library, with no dependencies on anything else, and DebugInfoCodeView and DebugInfoPDB take dependencies on DebugInfoMsf. llvm-svn: 276458
49 lines
1.9 KiB
C++
49 lines
1.9 KiB
C++
//===- MsfCommon.cpp - Common types and functions for MSF files -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/DebugInfo/Msf/MsfCommon.h"
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#include "llvm/DebugInfo/Msf/MsfError.h"
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using namespace llvm;
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using namespace llvm::msf;
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Error llvm::msf::validateSuperBlock(const SuperBlock &SB) {
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// Check the magic bytes.
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if (std::memcmp(SB.MagicBytes, Magic, sizeof(Magic)) != 0)
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return make_error<MsfError>(msf_error_code::invalid_format,
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"MSF magic header doesn't match");
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if (!isValidBlockSize(SB.BlockSize))
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return make_error<MsfError>(msf_error_code::invalid_format,
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"Unsupported block size.");
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// We don't support directories whose sizes aren't a multiple of four bytes.
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if (SB.NumDirectoryBytes % sizeof(support::ulittle32_t) != 0)
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return make_error<MsfError>(msf_error_code::invalid_format,
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"Directory size is not multiple of 4.");
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// The number of blocks which comprise the directory is a simple function of
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// the number of bytes it contains.
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uint64_t NumDirectoryBlocks =
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bytesToBlocks(SB.NumDirectoryBytes, SB.BlockSize);
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// The directory, as we understand it, is a block which consists of a list of
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// block numbers. It is unclear what would happen if the number of blocks
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// couldn't fit on a single block.
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if (NumDirectoryBlocks > SB.BlockSize / sizeof(support::ulittle32_t))
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return make_error<MsfError>(msf_error_code::invalid_format,
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"Too many directory blocks.");
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if (SB.BlockMapAddr == 0)
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return make_error<MsfError>(msf_error_code::invalid_format,
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"Block 0 is reserved");
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return Error::success();
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}
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