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da15acbd68
For this, add a few toString() calls when printing the "undefined symbol" diagnostics; toString() already does demangling on Windows hosts. Also make lld::demangleMSVC() (called by toString(Symbol*)) call LLVM's microsoftDemangle() instead of UnDecorateSymbolName() so that it works on non-Windows hosts – this makes both updating tests easier and provides a better user experience for people doing cross-links. This doesn't yet do the right thing for symbols starting with __imp_, but that can be improved in a follow-up. Differential Revision: https://reviews.llvm.org/D52104 llvm-svn: 342332
99 lines
2.8 KiB
C++
99 lines
2.8 KiB
C++
//===- Strings.cpp -------------------------------------------------------===//
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//
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// The LLVM Linker
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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 "lld/Common/Strings.h"
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#include "lld/Common/ErrorHandler.h"
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#include "lld/Common/LLVM.h"
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#include "llvm/Demangle/Demangle.h"
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#include "llvm/Support/GlobPattern.h"
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#include <algorithm>
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#include <mutex>
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#include <vector>
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using namespace llvm;
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using namespace lld;
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// Returns the demangled C++ symbol name for Name.
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Optional<std::string> lld::demangleItanium(StringRef Name) {
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// itaniumDemangle can be used to demangle strings other than symbol
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// names which do not necessarily start with "_Z". Name can be
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// either a C or C++ symbol. Don't call itaniumDemangle if the name
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// does not look like a C++ symbol name to avoid getting unexpected
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// result for a C symbol that happens to match a mangled type name.
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if (!Name.startswith("_Z"))
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return None;
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char *Buf = itaniumDemangle(Name.str().c_str(), nullptr, nullptr, nullptr);
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if (!Buf)
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return None;
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std::string S(Buf);
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free(Buf);
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return S;
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}
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Optional<std::string> lld::demangleMSVC(StringRef Name) {
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if (!Name.startswith("?"))
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return None;
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char *Buf = microsoftDemangle(Name.str().c_str(), nullptr, nullptr, nullptr);
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if (!Buf)
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return None;
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std::string S(Buf);
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free(Buf);
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return S;
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}
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StringMatcher::StringMatcher(ArrayRef<StringRef> Pat) {
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for (StringRef S : Pat) {
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Expected<GlobPattern> Pat = GlobPattern::create(S);
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if (!Pat)
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error(toString(Pat.takeError()));
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else
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Patterns.push_back(*Pat);
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}
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}
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bool StringMatcher::match(StringRef S) const {
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for (const GlobPattern &Pat : Patterns)
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if (Pat.match(S))
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return true;
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return false;
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}
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// Converts a hex string (e.g. "deadbeef") to a vector.
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std::vector<uint8_t> lld::parseHex(StringRef S) {
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std::vector<uint8_t> Hex;
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while (!S.empty()) {
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StringRef B = S.substr(0, 2);
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S = S.substr(2);
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uint8_t H;
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if (!to_integer(B, H, 16)) {
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error("not a hexadecimal value: " + B);
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return {};
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}
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Hex.push_back(H);
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}
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return Hex;
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}
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// Returns true if S is valid as a C language identifier.
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bool lld::isValidCIdentifier(StringRef S) {
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return !S.empty() && (isAlpha(S[0]) || S[0] == '_') &&
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std::all_of(S.begin() + 1, S.end(),
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[](char C) { return C == '_' || isAlnum(C); });
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}
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// Write the contents of the a buffer to a file
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void lld::saveBuffer(StringRef Buffer, const Twine &Path) {
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std::error_code EC;
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raw_fd_ostream OS(Path.str(), EC, sys::fs::OpenFlags::F_None);
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if (EC)
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error("cannot create " + Path + ": " + EC.message());
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OS << Buffer;
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}
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