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Merge DarwinLdDriver and Driver.

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Now that DarwinLdDriver is the only derived class of Driver.
This patch merges them and actually removed the class because
they can now just be non-member functions. This change simplifies
a common header, Driver.h.

http://reviews.llvm.org/D17788

llvm-svn: 262502
This commit is contained in:
Rui Ueyama 2016-03-02 19:08:05 +00:00
parent 515025522b
commit a453c0a5ad
10 changed files with 103 additions and 179 deletions
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1
lld/COFF/Driver.cpp
View File

@ -14,6 +14,7 @@
#include "SymbolTable.h"
#include "Symbols.h"
#include "Writer.h"
#include "lld/Driver/Driver.h"
#include "llvm/ADT/Optional.h"
#include "llvm/LibDriver/LibDriver.h"
#include "llvm/Option/Arg.h"

3
lld/COFF/Driver.h
View File

@ -34,9 +34,6 @@ using llvm::COFF::WindowsSubsystem;
using llvm::Optional;
class InputFile;
// Entry point of the COFF linker.
bool link(llvm::ArrayRef<const char *> Args);
// Implemented in MarkLive.cpp.
void markLive(const std::vector<Chunk *> &Chunks);

1
lld/ELF/Driver.cpp
View File

@ -16,6 +16,7 @@
#include "SymbolTable.h"
#include "Target.h"
#include "Writer.h"
#include "lld/Driver/Driver.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/raw_ostream.h"

3
lld/ELF/Driver.h
View File

@ -21,9 +21,6 @@ namespace elf {
extern class LinkerDriver *Driver;
// Entry point of the ELF linker. Returns true on success.
bool link(ArrayRef<const char *> Args, llvm::raw_ostream &Error = llvm::errs());
class LinkerDriver {
public:
void main(ArrayRef<const char *> Args);

62
lld/include/lld/Driver/Driver.h
View File

@ -6,71 +6,27 @@
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
///
/// Interface for Drivers which convert command line arguments into
/// LinkingContext objects, then perform the link.
///
//===----------------------------------------------------------------------===//
#ifndef LLD_DRIVER_DRIVER_H
#define LLD_DRIVER_DRIVER_H
#include "lld/Core/LLVM.h"
#include "lld/Core/Node.h"
#include "llvm/ADT/Triple.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/Support/raw_ostream.h"
#include <memory>
#include <set>
#include <vector>
namespace lld {
class LinkingContext;
class MachOLinkingContext;
/// Base class for all Drivers.
class Driver {
protected:
/// Performs link using specified options
static bool link(LinkingContext &context,
raw_ostream &diag = llvm::errs());
/// Parses the LLVM options from the context.
static void parseLLVMOptions(const LinkingContext &context);
private:
Driver() = delete;
};
/// Driver for darwin/ld64 'ld' command line options.
class DarwinLdDriver : public Driver {
public:
/// Parses command line arguments same as darwin's ld and performs link.
/// Returns true iff there was an error.
static bool linkMachO(llvm::ArrayRef<const char *> args,
raw_ostream &diag = llvm::errs());
/// Uses darwin style ld command line options to update LinkingContext object.
/// Returns true iff there was an error.
static bool parse(llvm::ArrayRef<const char *> args,
MachOLinkingContext &info,
raw_ostream &diag = llvm::errs());
private:
DarwinLdDriver() = delete;
};
/// Driver for Windows 'link.exe' command line options
namespace coff {
bool link(llvm::ArrayRef<const char *> args);
bool link(llvm::ArrayRef<const char *> Args);
}
namespace elf {
bool link(llvm::ArrayRef<const char *> args, raw_ostream &diag = llvm::errs());
bool link(llvm::ArrayRef<const char *> Args,
llvm::raw_ostream &Diag = llvm::errs());
}
} // end namespace lld
namespace mach_o {
bool link(llvm::ArrayRef<const char *> Args,
llvm::raw_ostream &Diag = llvm::errs());
}
}
#endif

1
lld/lib/Driver/CMakeLists.txt
View File

@ -4,7 +4,6 @@ add_public_tablegen_target(DriverOptionsTableGen)
add_lld_library(lldDriver
DarwinLdDriver.cpp
Driver.cpp
ADDITIONAL_HEADER_DIRS
${LLD_INCLUDE_DIR}/lld/Driver

96
lld/lib/Driver/DarwinLdDriver.cpp
View File

@ -13,8 +13,11 @@
///
//===----------------------------------------------------------------------===//
#include "lld/Core/File.h"
#include "lld/Core/ArchiveLibraryFile.h"
#include "lld/Core/File.h"
#include "lld/Core/Instrumentation.h"
#include "lld/Core/PassManager.h"
#include "lld/Core/Resolver.h"
#include "lld/Core/SharedLibraryFile.h"
#include "lld/Driver/Driver.h"
#include "lld/ReaderWriter/MachOLinkingContext.h"
@ -276,20 +279,24 @@ static bool parseNumberBase16(StringRef numStr, uint64_t &baseAddress) {
return numStr.getAsInteger(16, baseAddress);
}
namespace lld {
bool DarwinLdDriver::linkMachO(llvm::ArrayRef<const char *> args,
raw_ostream &diagnostics) {
MachOLinkingContext ctx;
if (!parse(args, ctx, diagnostics))
return false;
if (ctx.doNothing())
return true;
return link(ctx, diagnostics);
static void parseLLVMOptions(const LinkingContext &ctx) {
// Honor -mllvm
if (!ctx.llvmOptions().empty()) {
unsigned numArgs = ctx.llvmOptions().size();
auto **args = new const char *[numArgs + 2];
args[0] = "lld (LLVM option parsing)";
for (unsigned i = 0; i != numArgs; ++i)
args[i + 1] = ctx.llvmOptions()[i];
args[numArgs + 1] = nullptr;
llvm::cl::ParseCommandLineOptions(numArgs + 1, args);
}
}
bool DarwinLdDriver::parse(llvm::ArrayRef<const char *> args,
MachOLinkingContext &ctx, raw_ostream &diagnostics) {
namespace lld {
namespace mach_o {
bool parse(llvm::ArrayRef<const char *> args, MachOLinkingContext &ctx,
raw_ostream &diagnostics) {
// Parse command line options using DarwinLdOptions.td
DarwinLdOptTable table;
unsigned missingIndex;
@ -1124,5 +1131,68 @@ bool DarwinLdDriver::parse(llvm::ArrayRef<const char *> args,
return ctx.validate(diagnostics);
}
/// This is where the link is actually performed.
bool link(llvm::ArrayRef<const char *> args, raw_ostream &diagnostics) {
MachOLinkingContext ctx;
if (!parse(args, ctx, diagnostics))
return false;
if (ctx.doNothing())
return true;
if (ctx.getNodes().empty())
return false;
for (std::unique_ptr<Node> &ie : ctx.getNodes())
if (FileNode *node = dyn_cast<FileNode>(ie.get()))
node->getFile()->parse();
std::vector<std::unique_ptr<File>> internalFiles;
ctx.createInternalFiles(internalFiles);
for (auto i = internalFiles.rbegin(), e = internalFiles.rend(); i != e; ++i) {
auto &members = ctx.getNodes();
members.insert(members.begin(), llvm::make_unique<FileNode>(std::move(*i)));
}
// Give target a chance to add files.
std::vector<std::unique_ptr<File>> implicitFiles;
ctx.createImplicitFiles(implicitFiles);
for (auto i = implicitFiles.rbegin(), e = implicitFiles.rend(); i != e; ++i) {
auto &members = ctx.getNodes();
members.insert(members.begin(), llvm::make_unique<FileNode>(std::move(*i)));
}
// Give target a chance to postprocess input files.
// Mach-O uses this chance to move all object files before library files.
ctx.finalizeInputFiles();
// Do core linking.
ScopedTask resolveTask(getDefaultDomain(), "Resolve");
Resolver resolver(ctx);
if (!resolver.resolve())
return false;
std::unique_ptr<SimpleFile> merged = resolver.resultFile();
resolveTask.end();
// Run passes on linked atoms.
ScopedTask passTask(getDefaultDomain(), "Passes");
PassManager pm;
ctx.addPasses(pm);
if (std::error_code ec = pm.runOnFile(*merged)) {
diagnostics << "Failed to write file '" << ctx.outputPath()
<< "': " << ec.message() << "\n";
return false;
}
passTask.end();
// Give linked atoms to Writer to generate output file.
ScopedTask writeTask(getDefaultDomain(), "Write");
if (std::error_code ec = ctx.writeFile(*merged)) {
diagnostics << "Failed to write file '" << ctx.outputPath()
<< "': " << ec.message() << "\n";
return false;
}
return true;
}
} // namespace mach_o
} // namespace lld

104
lld/lib/Driver/Driver.cpp
View File

@ -1,104 +0,0 @@
//===- lib/Driver/Driver.cpp - Linker Driver Emulator -----------*- C++ -*-===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lld/Core/ArchiveLibraryFile.h"
#include "lld/Core/File.h"
#include "lld/Core/Instrumentation.h"
#include "lld/Core/LLVM.h"
#include "lld/Core/PassManager.h"
#include "lld/Core/Reader.h"
#include "lld/Core/Resolver.h"
#include "lld/Core/Writer.h"
#include "lld/Driver/Driver.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Option/Arg.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/raw_ostream.h"
#include <mutex>
namespace lld {
void Driver::parseLLVMOptions(const LinkingContext &ctx) {
// Honor -mllvm
if (!ctx.llvmOptions().empty()) {
unsigned numArgs = ctx.llvmOptions().size();
auto **args = new const char *[numArgs + 2];
args[0] = "lld (LLVM option parsing)";
for (unsigned i = 0; i != numArgs; ++i)
args[i + 1] = ctx.llvmOptions()[i];
args[numArgs + 1] = nullptr;
llvm::cl::ParseCommandLineOptions(numArgs + 1, args);
}
}
/// This is where the link is actually performed.
bool Driver::link(LinkingContext &ctx, raw_ostream &diagnostics) {
if (ctx.getNodes().empty())
return false;
for (std::unique_ptr<Node> &ie : ctx.getNodes())
if (FileNode *node = dyn_cast<FileNode>(ie.get()))
node->getFile()->parse();
std::vector<std::unique_ptr<File>> internalFiles;
ctx.createInternalFiles(internalFiles);
for (auto i = internalFiles.rbegin(), e = internalFiles.rend(); i != e; ++i) {
auto &members = ctx.getNodes();
members.insert(members.begin(), llvm::make_unique<FileNode>(std::move(*i)));
}
// Give target a chance to add files.
std::vector<std::unique_ptr<File>> implicitFiles;
ctx.createImplicitFiles(implicitFiles);
for (auto i = implicitFiles.rbegin(), e = implicitFiles.rend(); i != e; ++i) {
auto &members = ctx.getNodes();
members.insert(members.begin(), llvm::make_unique<FileNode>(std::move(*i)));
}
// Give target a chance to postprocess input files.
// Mach-O uses this chance to move all object files before library files.
ctx.finalizeInputFiles();
// Do core linking.
ScopedTask resolveTask(getDefaultDomain(), "Resolve");
Resolver resolver(ctx);
if (!resolver.resolve())
return false;
std::unique_ptr<SimpleFile> merged = resolver.resultFile();
resolveTask.end();
// Run passes on linked atoms.
ScopedTask passTask(getDefaultDomain(), "Passes");
PassManager pm;
ctx.addPasses(pm);
if (std::error_code ec = pm.runOnFile(*merged)) {
diagnostics << "Failed to write file '" << ctx.outputPath()
<< "': " << ec.message() << "\n";
return false;
}
passTask.end();
// Give linked atoms to Writer to generate output file.
ScopedTask writeTask(getDefaultDomain(), "Write");
if (std::error_code ec = ctx.writeFile(*merged)) {
diagnostics << "Failed to write file '" << ctx.outputPath()
<< "': " << ec.message() << "\n";
return false;
}
return true;
}
} // namespace lld

2
lld/tools/lld/lld.cpp
View File

@ -109,7 +109,7 @@ int main(int Argc, const char **Argv) {
case WinLink:
return !coff::link(Args);
case Darwin:
return !DarwinLdDriver::linkMachO(Args);
return !mach_o::link(Args);
default:
die("-flavor option is missing. Available flavors are "
"gnu, darwin or link.");

9
lld/unittests/DriverTests/DarwinLdDriverTest.cpp
View File

@ -21,6 +21,13 @@
using namespace llvm;
using namespace lld;
namespace lld {
namespace mach_o {
bool parse(llvm::ArrayRef<const char *> args, MachOLinkingContext &ctx,
raw_ostream &diagnostics);
}
}
namespace {
class DarwinLdParserTest : public testing::Test {
protected:
@ -37,7 +44,7 @@ protected:
args.insert(args.begin(), "ld");
std::string errorMessage;
raw_string_ostream os(errorMessage);
return DarwinLdDriver::parse(args, _ctx, os);
return mach_o::parse(args, _ctx, os);
}
MachOLinkingContext _ctx;