105 lines
2.9 KiB
C++
105 lines
2.9 KiB
C++
//===- Strings.cpp -------------------------------------------------------===//
|
|
//
|
|
// The LLVM Linker
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "lld/Common/Strings.h"
|
|
#include "lld/Common/ErrorHandler.h"
|
|
#include "lld/Common/LLVM.h"
|
|
#include "llvm/Demangle/Demangle.h"
|
|
#include "llvm/Support/GlobPattern.h"
|
|
#include <algorithm>
|
|
#include <mutex>
|
|
#include <vector>
|
|
|
|
using namespace llvm;
|
|
using namespace lld;
|
|
|
|
// Returns the demangled C++ symbol name for Name.
|
|
Optional<std::string> lld::demangleItanium(StringRef Name) {
|
|
// itaniumDemangle can be used to demangle strings other than symbol
|
|
// names which do not necessarily start with "_Z". Name can be
|
|
// either a C or C++ symbol. Don't call itaniumDemangle if the name
|
|
// does not look like a C++ symbol name to avoid getting unexpected
|
|
// result for a C symbol that happens to match a mangled type name.
|
|
if (!Name.startswith("_Z"))
|
|
return None;
|
|
|
|
char *Buf = itaniumDemangle(Name.str().c_str(), nullptr, nullptr, nullptr);
|
|
if (!Buf)
|
|
return None;
|
|
std::string S(Buf);
|
|
free(Buf);
|
|
return S;
|
|
}
|
|
|
|
Optional<std::string> lld::demangleMSVC(StringRef Name) {
|
|
std::string Prefix;
|
|
if (Name.consume_front("__imp_"))
|
|
Prefix = "__declspec(dllimport) ";
|
|
|
|
// Demangle only C++ names.
|
|
if (!Name.startswith("?"))
|
|
return None;
|
|
|
|
char *Buf = microsoftDemangle(Name.str().c_str(), nullptr, nullptr, nullptr);
|
|
if (!Buf)
|
|
return None;
|
|
std::string S(Buf);
|
|
free(Buf);
|
|
return Prefix + S;
|
|
}
|
|
|
|
StringMatcher::StringMatcher(ArrayRef<StringRef> Pat) {
|
|
for (StringRef S : Pat) {
|
|
Expected<GlobPattern> Pat = GlobPattern::create(S);
|
|
if (!Pat)
|
|
error(toString(Pat.takeError()));
|
|
else
|
|
Patterns.push_back(*Pat);
|
|
}
|
|
}
|
|
|
|
bool StringMatcher::match(StringRef S) const {
|
|
for (const GlobPattern &Pat : Patterns)
|
|
if (Pat.match(S))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
// Converts a hex string (e.g. "deadbeef") to a vector.
|
|
std::vector<uint8_t> lld::parseHex(StringRef S) {
|
|
std::vector<uint8_t> Hex;
|
|
while (!S.empty()) {
|
|
StringRef B = S.substr(0, 2);
|
|
S = S.substr(2);
|
|
uint8_t H;
|
|
if (!to_integer(B, H, 16)) {
|
|
error("not a hexadecimal value: " + B);
|
|
return {};
|
|
}
|
|
Hex.push_back(H);
|
|
}
|
|
return Hex;
|
|
}
|
|
|
|
// Returns true if S is valid as a C language identifier.
|
|
bool lld::isValidCIdentifier(StringRef S) {
|
|
return !S.empty() && (isAlpha(S[0]) || S[0] == '_') &&
|
|
std::all_of(S.begin() + 1, S.end(),
|
|
[](char C) { return C == '_' || isAlnum(C); });
|
|
}
|
|
|
|
// Write the contents of the a buffer to a file
|
|
void lld::saveBuffer(StringRef Buffer, const Twine &Path) {
|
|
std::error_code EC;
|
|
raw_fd_ostream OS(Path.str(), EC, sys::fs::OpenFlags::F_None);
|
|
if (EC)
|
|
error("cannot create " + Path + ": " + EC.message());
|
|
OS << Buffer;
|
|
}
|