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-rw-r--r--ELF/DriverUtils.cpp234
1 files changed, 195 insertions, 39 deletions
diff --git a/ELF/DriverUtils.cpp b/ELF/DriverUtils.cpp
index 965ed4f00a61..3f18259b4ae7 100644
--- a/ELF/DriverUtils.cpp
+++ b/ELF/DriverUtils.cpp
@@ -15,16 +15,20 @@
#include "Driver.h"
#include "Error.h"
+#include "lld/Config/Version.h"
#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/Option/Option.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/StringSaver.h"
using namespace llvm;
+using namespace llvm::sys;
using namespace lld;
-using namespace lld::elf2;
+using namespace lld::elf;
// Create OptTable
@@ -34,55 +38,208 @@ using namespace lld::elf2;
#undef PREFIX
// Create table mapping all options defined in Options.td
-static const opt::OptTable::Info infoTable[] = {
+static const opt::OptTable::Info OptInfo[] = {
#define OPTION(X1, X2, ID, KIND, GROUP, ALIAS, X6, X7, X8, X9, X10) \
{ \
X1, X2, X9, X10, OPT_##ID, opt::Option::KIND##Class, X8, X7, OPT_##GROUP, \
OPT_##ALIAS, X6 \
- } \
- ,
+ },
#include "Options.inc"
#undef OPTION
};
-class ELFOptTable : public opt::OptTable {
-public:
- ELFOptTable() : OptTable(infoTable) {}
-};
+ELFOptTable::ELFOptTable() : OptTable(OptInfo) {}
+
+static cl::TokenizerCallback getQuotingStyle(opt::InputArgList &Args) {
+ if (auto *Arg = Args.getLastArg(OPT_rsp_quoting)) {
+ StringRef S = Arg->getValue();
+ if (S != "windows" && S != "posix")
+ error("invalid response file quoting: " + S);
+ if (S == "windows")
+ return cl::TokenizeWindowsCommandLine;
+ return cl::TokenizeGNUCommandLine;
+ }
+ if (Triple(sys::getProcessTriple()).getOS() == Triple::Win32)
+ return cl::TokenizeWindowsCommandLine;
+ return cl::TokenizeGNUCommandLine;
+}
// Parses a given list of options.
-opt::InputArgList elf2::parseArgs(llvm::BumpPtrAllocator *A,
- ArrayRef<const char *> Argv) {
+opt::InputArgList ELFOptTable::parse(ArrayRef<const char *> Argv) {
// Make InputArgList from string vectors.
- ELFOptTable Table;
unsigned MissingIndex;
unsigned MissingCount;
+ SmallVector<const char *, 256> Vec(Argv.data(), Argv.data() + Argv.size());
+
+ // We need to get the quoting style for response files before parsing all
+ // options so we parse here before and ignore all the options but
+ // --rsp-quoting.
+ opt::InputArgList Args = this->ParseArgs(Vec, MissingIndex, MissingCount);
// Expand response files. '@<filename>' is replaced by the file's contents.
- SmallVector<const char *, 256> Vec(Argv.data(), Argv.data() + Argv.size());
- StringSaver Saver(*A);
- llvm::cl::ExpandResponseFiles(Saver, llvm::cl::TokenizeGNUCommandLine, Vec);
+ StringSaver Saver(Alloc);
+ cl::ExpandResponseFiles(Saver, getQuotingStyle(Args), Vec);
// Parse options and then do error checking.
- opt::InputArgList Args = Table.ParseArgs(Vec, MissingIndex, MissingCount);
+ Args = this->ParseArgs(Vec, MissingIndex, MissingCount);
if (MissingCount)
error(Twine("missing arg value for \"") + Args.getArgString(MissingIndex) +
"\", expected " + Twine(MissingCount) +
(MissingCount == 1 ? " argument.\n" : " arguments"));
- iterator_range<opt::arg_iterator> Unknowns = Args.filtered(OPT_UNKNOWN);
- for (auto *Arg : Unknowns)
- warning("warning: unknown argument: " + Arg->getSpelling());
- if (Unknowns.begin() != Unknowns.end())
- error("unknown argument(s) found");
-
+ for (auto *Arg : Args.filtered(OPT_UNKNOWN))
+ error("unknown argument: " + Arg->getSpelling());
return Args;
}
-std::string elf2::findFromSearchPaths(StringRef Path) {
+void elf::printHelp(const char *Argv0) {
+ ELFOptTable Table;
+ Table.PrintHelp(outs(), Argv0, "lld", false);
+}
+
+std::string elf::getVersionString() {
+ std::string Version = getLLDVersion();
+ std::string Repo = getLLDRepositoryVersion();
+ if (Repo.empty())
+ return "LLD " + Version + "\n";
+ return "LLD " + Version + " " + Repo + "\n";
+}
+
+// Makes a given pathname an absolute path first, and then remove
+// beginning /. For example, "../foo.o" is converted to "home/john/foo.o",
+// assuming that the current directory is "/home/john/bar".
+std::string elf::relativeToRoot(StringRef Path) {
+ SmallString<128> Abs = Path;
+ if (std::error_code EC = fs::make_absolute(Abs))
+ fatal("make_absolute failed: " + EC.message());
+ path::remove_dots(Abs, /*remove_dot_dot=*/true);
+
+ // This is Windows specific. root_name() returns a drive letter
+ // (e.g. "c:") or a UNC name (//net). We want to keep it as part
+ // of the result.
+ SmallString<128> Res;
+ StringRef Root = path::root_name(Abs);
+ if (Root.endswith(":"))
+ Res = Root.drop_back();
+ else if (Root.startswith("//"))
+ Res = Root.substr(2);
+
+ path::append(Res, path::relative_path(Abs));
+ return Res.str();
+}
+
+CpioFile::CpioFile(std::unique_ptr<raw_fd_ostream> OS, StringRef S)
+ : OS(std::move(OS)), Basename(S) {}
+
+CpioFile *CpioFile::create(StringRef OutputPath) {
+ std::string Path = (OutputPath + ".cpio").str();
+ std::error_code EC;
+ auto OS = llvm::make_unique<raw_fd_ostream>(Path, EC, fs::F_None);
+ if (EC) {
+ error(EC, "--reproduce: failed to open " + Path);
+ return nullptr;
+ }
+ return new CpioFile(std::move(OS), path::filename(OutputPath));
+}
+
+static void writeMember(raw_fd_ostream &OS, StringRef Path, StringRef Data) {
+ // The c_dev/c_ino pair should be unique according to the spec,
+ // but no one seems to care.
+ OS << "070707"; // c_magic
+ OS << "000000"; // c_dev
+ OS << "000000"; // c_ino
+ OS << "100664"; // c_mode: C_ISREG | rw-rw-r--
+ OS << "000000"; // c_uid
+ OS << "000000"; // c_gid
+ OS << "000001"; // c_nlink
+ OS << "000000"; // c_rdev
+ OS << "00000000000"; // c_mtime
+ OS << format("%06o", Path.size() + 1); // c_namesize
+ OS << format("%011o", Data.size()); // c_filesize
+ OS << Path << '\0'; // c_name
+ OS << Data; // c_filedata
+}
+
+void CpioFile::append(StringRef Path, StringRef Data) {
+ if (!Seen.insert(Path).second)
+ return;
+
+ // Construct an in-archive filename so that /home/foo/bar is stored
+ // as baz/home/foo/bar where baz is the basename of the output file.
+ // (i.e. in that case we are creating baz.cpio.)
+ SmallString<128> Fullpath;
+ path::append(Fullpath, Basename, Path);
+
+ // Use unix path separators so the cpio can be extracted on both unix and
+ // windows.
+ std::replace(Fullpath.begin(), Fullpath.end(), '\\', '/');
+
+ writeMember(*OS, Fullpath, Data);
+
+ // Print the trailer and seek back.
+ // This way we have a valid archive if we crash.
+ uint64_t Pos = OS->tell();
+ writeMember(*OS, "TRAILER!!!", "");
+ OS->seek(Pos);
+}
+
+// Quote a given string if it contains a space character.
+static std::string quote(StringRef S) {
+ if (S.find(' ') == StringRef::npos)
+ return S;
+ return ("\"" + S + "\"").str();
+}
+
+static std::string rewritePath(StringRef S) {
+ if (fs::exists(S))
+ return relativeToRoot(S);
+ return S;
+}
+
+static std::string stringize(opt::Arg *Arg) {
+ std::string K = Arg->getSpelling();
+ if (Arg->getNumValues() == 0)
+ return K;
+ std::string V = quote(Arg->getValue());
+ if (Arg->getOption().getRenderStyle() == opt::Option::RenderJoinedStyle)
+ return K + V;
+ return K + " " + V;
+}
+
+// Reconstructs command line arguments so that so that you can re-run
+// the same command with the same inputs. This is for --reproduce.
+std::string elf::createResponseFile(const opt::InputArgList &Args) {
+ SmallString<0> Data;
+ raw_svector_ostream OS(Data);
+
+ // Copy the command line to the output while rewriting paths.
+ for (auto *Arg : Args) {
+ switch (Arg->getOption().getID()) {
+ case OPT_reproduce:
+ break;
+ case OPT_INPUT:
+ OS << quote(rewritePath(Arg->getValue())) << "\n";
+ break;
+ case OPT_L:
+ case OPT_dynamic_list:
+ case OPT_rpath:
+ case OPT_alias_script_T:
+ case OPT_script:
+ case OPT_version_script:
+ OS << Arg->getSpelling() << " "
+ << quote(rewritePath(Arg->getValue())) << "\n";
+ break;
+ default:
+ OS << stringize(Arg) << "\n";
+ }
+ }
+ return Data.str();
+}
+
+std::string elf::findFromSearchPaths(StringRef Path) {
for (StringRef Dir : Config->SearchPaths) {
std::string FullPath = buildSysrootedPath(Dir, Path);
- if (sys::fs::exists(FullPath))
+ if (fs::exists(FullPath))
return FullPath;
}
return "";
@@ -90,31 +247,30 @@ std::string elf2::findFromSearchPaths(StringRef Path) {
// Searches a given library from input search paths, which are filled
// from -L command line switches. Returns a path to an existent library file.
-std::string elf2::searchLibrary(StringRef Path) {
- std::vector<std::string> Names;
- if (Path[0] == ':') {
- Names.push_back(Path.drop_front());
- } else {
- if (!Config->Static)
- Names.push_back(("lib" + Path + ".so").str());
- Names.push_back(("lib" + Path + ".a").str());
- }
- for (const std::string &Name : Names) {
- std::string S = findFromSearchPaths(Name);
- if (!S.empty())
+std::string elf::searchLibrary(StringRef Path) {
+ if (Path.startswith(":"))
+ return findFromSearchPaths(Path.substr(1));
+ for (StringRef Dir : Config->SearchPaths) {
+ if (!Config->Static) {
+ std::string S = buildSysrootedPath(Dir, ("lib" + Path + ".so").str());
+ if (fs::exists(S))
+ return S;
+ }
+ std::string S = buildSysrootedPath(Dir, ("lib" + Path + ".a").str());
+ if (fs::exists(S))
return S;
}
- error("Unable to find library -l" + Path);
+ return "";
}
// Makes a path by concatenating Dir and File.
// If Dir starts with '=' the result will be preceded by Sysroot,
// which can be set with --sysroot command line switch.
-std::string elf2::buildSysrootedPath(StringRef Dir, StringRef File) {
+std::string elf::buildSysrootedPath(StringRef Dir, StringRef File) {
SmallString<128> Path;
if (Dir.startswith("="))
- sys::path::append(Path, Config->Sysroot, Dir.substr(1), File);
+ path::append(Path, Config->Sysroot, Dir.substr(1), File);
else
- sys::path::append(Path, Dir, File);
+ path::append(Path, Dir, File);
return Path.str();
}
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