e16c0a9a68
This patch:
- adds an ld64.lld.darwinnew symlink for lld, to go with f2710d4b57,
so that `clang -fuse-ld=lld.darwinnew` can be used to test new
Mach-O lld while it's in bring-up. (The expectation is that we'll
remove this again once new Mach-O lld is the defauld and only Mach-O
lld.)
- lets the clang driver know if the linker is lld (currently
only triggered if `-fuse-ld=lld` or `-fuse-ld=lld.darwinnew` is
passed). Currently only used for the next point, but could be used
to implement other features that need close coordination between
compiler and linker, e.g. having a diag for calling `clang++` instead
of `clang` when link errors are caused by a missing C++ stdlib.
- lets the clang driver pass `-demangle` to Mach-O lld (both old and
new), in addition to ld64
- implements -demangle for new Mach-O lld
- changes demangleItanium() to accept _Z, __Z, ___Z, ____Z prefixes
(and updates one test added in D68014). Mach-O has an extra
underscore for symbols, and the three (or, on Mach-O, four)
underscores are used for block names.
Differential Revision: https://reviews.llvm.org/D91884
92 lines
2.8 KiB
C++
92 lines
2.8 KiB
C++
//===- Strings.cpp -------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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/FileSystem.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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std::string lld::demangleItanium(StringRef name) {
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// demangleItanium() can be called for all symbols. Only demangle C++ symbols,
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// to avoid getting unexpected result for a C symbol that happens to match a
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// mangled type name such as "Pi" (which would demangle to "int*").
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if (!name.startswith("_Z") && !name.startswith("__Z") &&
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!name.startswith("___Z") && !name.startswith("____Z"))
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return std::string(name);
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return demangle(std::string(name));
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}
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SingleStringMatcher::SingleStringMatcher(StringRef Pattern) {
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if (Pattern.size() > 2 && Pattern.startswith("\"") &&
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Pattern.endswith("\"")) {
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ExactMatch = true;
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ExactPattern = Pattern.substr(1, Pattern.size() - 2);
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} else {
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Expected<GlobPattern> Glob = GlobPattern::create(Pattern);
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if (!Glob) {
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error(toString(Glob.takeError()));
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return;
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}
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ExactMatch = false;
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GlobPatternMatcher = *Glob;
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}
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}
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bool SingleStringMatcher::match(StringRef s) const {
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return ExactMatch ? (ExactPattern == s) : GlobPatternMatcher.match(s);
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}
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bool StringMatcher::match(StringRef s) const {
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for (const SingleStringMatcher &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::OF_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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