forked from OSchip/llvm-project
99 lines
2.7 KiB
C++
99 lines
2.7 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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#if defined(_MSC_VER)
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#include <DbgHelp.h>
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#include <Windows.h>
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#pragma comment(lib, "dbghelp.lib")
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#endif
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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 S) {
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#if defined(_MSC_VER)
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// UnDecorateSymbolName is not thread-safe, so we need a mutex.
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static std::mutex Mu;
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std::lock_guard<std::mutex> Lock(Mu);
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char Buf[4096];
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if (S.startswith("?"))
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if (size_t Len = UnDecorateSymbolName(S.str().c_str(), Buf, sizeof(Buf), 0))
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return std::string(Buf, Len);
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#endif
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return None;
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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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