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f0a7a434de
We're getting to the point that some MS tools (e.g. DIA) can recognize our PDBs but others (e.g. link.exe) cannot. I think the way forward is to improve our tooling to help us find differences more easily. For example, if we can compile the same program with clang-cl and cl and have a tool tell us all the places where the PDBs differ, this could tell us what we're doing wrong. It's tricky though, because there are a lot of "benign" differences in a PDB. For example, if the string table in one PDB consists of "foo" followed by "bar" and in the other PDB it consists of "bar" followed by "foo", this is not necessarily a critical difference, as long as the uses of these strings also refer to the correct location. On the other hand, if the second PDB doesn't even contain the string "foo" at all, this is a critical difference. diff mode has been in llvm-pdbutil for quite a while, but because of the above challenge along with some others, it's been hard to make it useful. I think this patch addresses that. It looks for all the same things, but it now prints the output in tabular format (carefully formatted and aligned into tables and fields), and it highlights critical differences in red, non-critical differences in yellow, and identical fields in green. This makes it easy to spot the places we differ, and the general concept of outputting arbitrary fields in tabular format can be extended to provide analysis into many of the different types of information that show up in a PDB. Differential Revision: https://reviews.llvm.org/D35039 llvm-svn: 307421
129 lines
3.9 KiB
C++
129 lines
3.9 KiB
C++
//===- FormatUtil.h ------------------------------------------- *- 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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#ifndef LLVM_TOOLS_LLVMPDBUTIL_FORMAT_UTIL_H
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#define LLVM_TOOLS_LLVMPDBUTIL_FORMAT_UTIL_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/Endian.h"
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#include "llvm/Support/FormatAdapters.h"
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#include "llvm/Support/FormatVariadic.h"
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#include <string>
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#include <type_traits>
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namespace llvm {
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namespace pdb {
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std::string truncateStringBack(StringRef S, uint32_t MaxLen);
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std::string truncateStringMiddle(StringRef S, uint32_t MaxLen);
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std::string truncateStringFront(StringRef S, uint32_t MaxLen);
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std::string truncateQuotedNameFront(StringRef Label, StringRef Name,
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uint32_t MaxLen);
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std::string truncateQuotedNameBack(StringRef Label, StringRef Name,
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uint32_t MaxLen);
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#define PUSH_MASKED_FLAG(Enum, Mask, TheOpt, Value, Text) \
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if (Enum::TheOpt == (Value & Mask)) \
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Opts.push_back(Text);
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#define PUSH_FLAG(Enum, TheOpt, Value, Text) \
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PUSH_MASKED_FLAG(Enum, Enum::TheOpt, TheOpt, Value, Text)
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#define RETURN_CASE(Enum, X, Ret) \
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case Enum::X: \
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return Ret;
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template <typename T> std::string formatUnknownEnum(T Value) {
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return formatv("unknown ({0})",
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static_cast<typename std::underlying_type<T>::type>(Value))
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.str();
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}
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std::string formatSegmentOffset(uint16_t Segment, uint32_t Offset);
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std::string typesetItemList(ArrayRef<std::string> Opts, uint32_t IndentLevel,
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uint32_t GroupSize, StringRef Sep);
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std::string typesetStringList(uint32_t IndentLevel,
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ArrayRef<StringRef> Strings);
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/// Returns the number of digits in the given integer.
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inline int NumDigits(uint64_t N) {
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if (N < 10ULL)
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return 1;
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if (N < 100ULL)
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return 2;
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if (N < 1000ULL)
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return 3;
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if (N < 10000ULL)
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return 4;
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if (N < 100000ULL)
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return 5;
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if (N < 1000000ULL)
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return 6;
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if (N < 10000000ULL)
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return 7;
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if (N < 100000000ULL)
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return 8;
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if (N < 1000000000ULL)
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return 9;
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if (N < 10000000000ULL)
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return 10;
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if (N < 100000000000ULL)
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return 11;
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if (N < 1000000000000ULL)
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return 12;
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if (N < 10000000000000ULL)
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return 13;
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if (N < 100000000000000ULL)
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return 14;
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if (N < 1000000000000000ULL)
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return 15;
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if (N < 10000000000000000ULL)
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return 16;
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if (N < 100000000000000000ULL)
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return 17;
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if (N < 1000000000000000000ULL)
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return 18;
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if (N < 10000000000000000000ULL)
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return 19;
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return 20;
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}
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namespace detail {
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template <typename T>
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struct EndianAdapter final
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: public FormatAdapter<support::detail::packed_endian_specific_integral<
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T, support::little, support::unaligned>> {
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using EndianType =
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support::detail::packed_endian_specific_integral<T, support::little,
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support::unaligned>;
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explicit EndianAdapter(EndianType &&Item)
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: FormatAdapter<EndianType>(std::move(Item)) {}
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void format(llvm::raw_ostream &Stream, StringRef Style) {
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format_provider<T>::format(static_cast<T>(this->Item), Stream, Style);
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}
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};
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} // namespace detail
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template <typename T>
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detail::EndianAdapter<T>
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fmtle(support::detail::packed_endian_specific_integral<T, support::little,
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support::unaligned>
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Value) {
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return detail::EndianAdapter<T>(std::move(Value));
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}
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}
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} // namespace llvm
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#endif
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