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41700b03da4a7e04d8889f17cb159926a53f32ff
swift-mirror/lib/Driver/Tools.cpp
Jordan Rose 41700b03da Add a new (hidden) option -autolink-force-load. 
This option puts a special symbol into the generated object files that other
object files can reference to force the library to be loaded.

The next commit will modify the way we serialize autolinking information so
that importers of this module will always emit a reference to this symbol.
This means the library will be linked into the final binary even if no other
symbols are used (which happens for some of our overlays that just add
category methods to Objective-C classes).

Part of <rdar://problem/16829587>

Swift SVN r17750
2014-05-09 01:07:07 +00:00

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//===--- Tools.cpp - Tools Implementations --------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#include "Tools.h"
#include "ToolChains.h"
#include "swift/Basic/Dwarf.h"
#include "swift/Basic/LLVM.h"
#include "swift/Basic/Platform.h"
#include "swift/Basic/Range.h"
#include "swift/Driver/Driver.h"
#include "swift/Driver/Job.h"
#include "swift/Driver/Options.h"
#include "swift/Frontend/Frontend.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
using namespace swift;
using namespace swift::driver;
using namespace swift::driver::tools;
using namespace llvm::opt;
/// Swift Tool
static void addInputsOfType(ArgStringList &Arguments, const ActionList &Inputs,
types::ID InputType) {
for (auto &Input : Inputs) {
if (Input->getType() != InputType)
continue;
Arguments.push_back(cast<InputAction>(Input)->getInputArg().getValue());
}
}
static void addInputsOfType(ArgStringList &Arguments, const Job *J,
types::ID InputType) {
if (const Command *Cmd = dyn_cast<Command>(J)) {
auto &output = Cmd->getOutput().getAnyOutputForType(InputType);
if (!output.empty())
Arguments.push_back(output.c_str());
} else if (const JobList *JL = dyn_cast<JobList>(J)) {
for (const Job *J : *JL)
addInputsOfType(Arguments, J, InputType);
} else {
llvm_unreachable("Unable to add input arguments for unknown Job class");
}
}
static void addPrimaryInputsOfType(ArgStringList &Arguments, const Job *J,
types::ID InputType) {
if (const Command *Cmd = dyn_cast<Command>(J)) {
auto &outputInfo = Cmd->getOutput();
if (outputInfo.getPrimaryOutputType() == InputType)
Arguments.push_back(outputInfo.getPrimaryOutputFilename().c_str());
} else if (const JobList *JL = dyn_cast<JobList>(J)) {
for (const Job *J : *JL)
addPrimaryInputsOfType(Arguments, J, InputType);
} else {
llvm_unreachable("Unable to add input arguments for unknown Job class");
}
}
/// Handle arguments common to all invocations of the frontend (compilation,
/// module-merging, etc).
static void addCommonFrontendArgs(const ToolChain &TC,
const OutputInfo &OI,
CommandOutput *output,
const ArgList &inputArgs,
ArgStringList &arguments) {
arguments.push_back("-target");
std::string TripleStr = TC.getTripleString();
arguments.push_back(inputArgs.MakeArgString(TripleStr));
arguments.push_back("-module-name");
arguments.push_back(inputArgs.MakeArgString(OI.ModuleName));
if (!OI.SDKPath.empty()) {
arguments.push_back("-sdk");
arguments.push_back(inputArgs.MakeArgString(OI.SDKPath));
}
inputArgs.AddAllArgs(arguments, options::OPT_I);
inputArgs.AddAllArgs(arguments, options::OPT_F);
inputArgs.AddLastArg(arguments, options::OPT_nostdimport);
inputArgs.AddLastArg(arguments, options::OPT_AssertConfig);
inputArgs.AddLastArg(arguments, options::OPT_g);
inputArgs.AddLastArg(arguments, options::OPT_resource_dir);
inputArgs.AddLastArg(arguments, options::OPT_module_cache_path);
inputArgs.AddLastArg(arguments, options::OPT_enable_app_extension);
inputArgs.AddLastArg(arguments, options::OPT_import_objc_header);
// Pass through the values passed to -Xfrontend.
inputArgs.AddAllArgValues(arguments, options::OPT_Xfrontend);
// Pass through any subsystem flags.
inputArgs.AddAllArgs(arguments, options::OPT_Xllvm);
inputArgs.AddAllArgs(arguments, options::OPT_Xcc);
const std::string &moduleDocOutputPath =
output->getAdditionalOutputForType(types::TY_SwiftModuleDocFile);
if (!moduleDocOutputPath.empty()) {
arguments.push_back("-emit-module-doc");
arguments.push_back("-emit-module-doc-path");
arguments.push_back(moduleDocOutputPath.c_str());
}
}
// Should this be done by the tool chain?
static void configureDefaultCPU(const llvm::Triple &triple,
ArgStringList &args) {
if (triple.isOSDarwin() && triple.getArch() == llvm::Triple::arm64) {
args.push_back("-target-cpu");
args.push_back("cyclone");
args.push_back("-target-feature");
args.push_back("+neon");
}
}
// Configure the ABI default
static void configureDefaultABI(const llvm::Triple &triple,
ArgStringList &args) {
if (triple.isOSDarwin() && triple.getArch() == llvm::Triple::arm64) {
args.push_back("-target-abi");
args.push_back("darwinpcs");
}
}
Job *Swift::constructJob(const JobAction &JA, std::unique_ptr<JobList> Inputs,
std::unique_ptr<CommandOutput> Output,
const ActionList &InputActions, const ArgList &Args,
const OutputInfo &OI) const {
ArgStringList Arguments;
const char *Exec = getToolChain().getDriver().getSwiftProgramPath().c_str();
// Invoke ourselves in -frontend mode.
Arguments.push_back("-frontend");
// Determine the frontend mode option.
const char *FrontendModeOption = nullptr;
switch (OI.CompilerMode) {
case OutputInfo::Mode::StandardCompile:
case OutputInfo::Mode::SingleCompile: {
switch (Output->getPrimaryOutputType()) {
case types::TY_Object:
FrontendModeOption = "-c";
break;
case types::TY_RawSIL:
FrontendModeOption = "-emit-silgen";
break;
case types::TY_SIL:
FrontendModeOption = "-emit-sil";
break;
case types::TY_LLVM_IR:
FrontendModeOption = "-emit-ir";
break;
case types::TY_LLVM_BC:
FrontendModeOption = "-emit-bc";
break;
case types::TY_Assembly:
FrontendModeOption = "-S";
break;
case types::TY_SwiftModuleFile:
// Since this is our primary output, we need to specify the option here.
FrontendModeOption = "-emit-module";
break;
case types::TY_Nothing:
// We were told to output nothing, so get the last mode option and use that.
if (const Arg *A = Args.getLastArg(options::OPT_modes_Group))
FrontendModeOption = A->getSpelling().data();
else
llvm_unreachable("We were told to perform a standard compile, "
"but no mode option was passed to the driver.");
break;
case types::TY_Swift:
case types::TY_dSYM:
case types::TY_Dependencies:
case types::TY_SwiftModuleDocFile:
case types::TY_ClangModuleFile:
case types::TY_SerializedDiagnostics:
case types::TY_ObjCHeader:
case types::TY_Image:
llvm_unreachable("Output type can never be primary output.");
case types::TY_INVALID:
case types::TY_LAST:
llvm_unreachable("Invalid type ID");
}
break;
}
case OutputInfo::Mode::Immediate:
FrontendModeOption = "-i";
break;
case OutputInfo::Mode::REPL:
FrontendModeOption = "-repl";
break;
}
assert(FrontendModeOption != nullptr && "No frontend mode option specified!");
Arguments.push_back(FrontendModeOption);
assert(Inputs->empty() &&
"The Swift frontend does not expect to be fed any input Jobs!");
// Add input arguments.
switch (OI.CompilerMode) {
case OutputInfo::Mode::StandardCompile: {
assert(InputActions.size() == 1 &&
"The Swift frontend expects exactly one input (the primary file)!");
const InputAction *IA = dyn_cast<InputAction>(InputActions[0]);
assert(IA && "Only InputActions can be passed as inputs!");
const Arg &PrimaryInputArg = IA->getInputArg();
bool FoundPrimaryInput = false;
for (const Arg *A : make_range(Args.filtered_begin(options::OPT_INPUT),
Args.filtered_end())) {
Option Opt = A->getOption();
if (A->getOption().matches(options::OPT_INPUT)) {
// See if this input should be passed with -primary-file.
if (!FoundPrimaryInput && PrimaryInputArg.getIndex() == A->getIndex()) {
Arguments.push_back("-primary-file");
FoundPrimaryInput = true;
}
Arguments.push_back(A->getValue());
}
}
break;
}
case OutputInfo::Mode::SingleCompile:
case OutputInfo::Mode::Immediate: {
for (const Action *A : InputActions) {
const InputAction *IA = dyn_cast<InputAction>(A);
assert(IA && "Only InputActions can be passed as inputs!");
IA->getInputArg().render(Args, Arguments);
}
break;
}
case OutputInfo::Mode::REPL: {
assert(InputActions.empty() && "REPL mode accepts no inputs!");
break;
}
}
if (!Args.hasArg(options::OPT_parse_stdlib))
Arguments.push_back("-enable-objc-attr-requires-objc-module");
addCommonFrontendArgs(getToolChain(), OI, Output.get(), Args, Arguments);
Args.AddLastArg(Arguments, options::OPT_module_link_name);
Args.AddLastArg(Arguments, options::OPT_import_underlying_module);
// FIXME: Warn if -module-link-name is not present.
Args.AddLastArg(Arguments, options::OPT_autolink_force_load);
Args.AddLastArg(Arguments, options::OPT_split_objc_selectors);
Args.AddLastArg(Arguments, options::OPT_implicit_objc_with);
Args.AddLastArg(Arguments, options::OPT_strict_keyword_arguments);
// Pass the optimization level down to the frontend.
Args.AddLastArg(Arguments, options::OPT_O_Group);
// Handle the CPU and its preferences.
if (auto arg = Args.getLastArg(options::OPT_target_cpu)) {
arg->render(Args, Arguments);
} else {
configureDefaultCPU(getToolChain().getTriple(), Arguments);
}
Args.AddAllArgs(Arguments, options::OPT_target_feature);
// Default the ABI based on the triple.
configureDefaultABI(getToolChain().getTriple(), Arguments);
if (Args.hasArg(options::OPT_parse_as_library) ||
Args.hasArg(options::OPT_emit_library))
Arguments.push_back("-parse-as-library");
Args.AddLastArg(Arguments, options::OPT_parse_sil);
Args.AddLastArg(Arguments, options::OPT_parse_stdlib);
Args.AddAllArgs(Arguments, options::OPT_l, options::OPT_framework);
const std::string &ModuleOutputPath =
Output->getAdditionalOutputForType(types::ID::TY_SwiftModuleFile);
if (!ModuleOutputPath.empty()) {
Arguments.push_back("-emit-module");
Arguments.push_back("-emit-module-path");
Arguments.push_back(ModuleOutputPath.c_str());
}
const std::string &SerializedDiagnosticsPath =
Output->getAdditionalOutputForType(types::TY_SerializedDiagnostics);
if (!SerializedDiagnosticsPath.empty()) {
Arguments.push_back("-serialize-diagnostics");
Arguments.push_back("-serialize-diagnostics-path");
Arguments.push_back(SerializedDiagnosticsPath.c_str());
}
// Pass on any build config options
for (const Arg *A : make_range(Args.filtered_begin(options::OPT_D),
Args.filtered_end())) {
Arguments.push_back("-D");
Arguments.push_back(A->getValue());
}
// Add the output file argument if necessary.
if (Output->getPrimaryOutputType() != types::TY_Nothing) {
Arguments.push_back("-o");
Arguments.push_back(Output->getPrimaryOutputFilename().c_str());
}
if (OI.CompilerMode == OutputInfo::Mode::Immediate)
Args.AddLastArg(Arguments, options::OPT__DASH_DASH);
return new Command(JA, *this, std::move(Inputs), std::move(Output), Exec,
Arguments);
}
Job *MergeModule::constructJob(const JobAction &JA,
std::unique_ptr<JobList> Inputs,
std::unique_ptr<CommandOutput> Output,
const ActionList &InputActions,
const ArgList &Args,
const OutputInfo &OI) const {
ArgStringList Arguments;
const char *Exec = getToolChain().getDriver().getSwiftProgramPath().c_str();
// Invoke ourself in -frontend mode.
Arguments.push_back("-frontend");
// We just want to emit a module, so pass -emit-module without any other
// mode options.
Arguments.push_back("-emit-module");
size_t origLen = Arguments.size();
(void)origLen;
addInputsOfType(Arguments, Inputs.get(), types::TY_SwiftModuleFile);
addInputsOfType(Arguments, InputActions, types::TY_SwiftModuleFile);
assert(Arguments.size() - origLen >= Inputs->size() + InputActions.size());
assert((Arguments.size() - origLen == Inputs->size() ||
!InputActions.empty()) &&
"every input to MergeModule must generate a swiftmodule");
// Tell all files to parse as library, which is necessary to load them as
// serialized ASTs.
Arguments.push_back("-parse-as-library");
addCommonFrontendArgs(getToolChain(), OI, Output.get(), Args, Arguments);
assert(Output->getPrimaryOutputType() == types::TY_SwiftModuleFile &&
"The MergeModule tool only produces swiftmodule files!");
const std::string &ObjCHeaderOutputPath =
Output->getAdditionalOutputForType(types::TY_ObjCHeader);
if (!ObjCHeaderOutputPath.empty()) {
Arguments.push_back("-emit-objc-header");
Arguments.push_back("-emit-objc-header-path");
Arguments.push_back(ObjCHeaderOutputPath.c_str());
}
Arguments.push_back("-o");
Arguments.push_back(Args.MakeArgString(Output->getPrimaryOutputFilename()));
return new Command(JA, *this, std::move(Inputs), std::move(Output), Exec,
Arguments);
}
bool LLDB::isPresentRelativeToDriver() const {
if (!Bits.DidCheckRelativeToDriver) {
const Driver &D = getToolChain().getDriver();
llvm::SmallString<128> LLDBPath{D.getSwiftProgramPath()};
llvm::sys::path::remove_filename(LLDBPath); // swift
// First try "bin/lldb" (i.e. next to Swift).
llvm::sys::path::append(LLDBPath, "lldb");
if (llvm::sys::fs::exists(LLDBPath.str())) {
Path = LLDBPath.str().str();
} else {
// Then see if we're in an Xcode toolchain.
llvm::sys::path::remove_filename(LLDBPath); // lldb
llvm::sys::path::remove_filename(LLDBPath); // bin
llvm::sys::path::remove_filename(LLDBPath); // usr
if (llvm::sys::path::extension(LLDBPath) == ".xctoolchain") {
llvm::sys::path::remove_filename(LLDBPath); // *.xctoolchain
llvm::sys::path::remove_filename(LLDBPath); // Toolchains
llvm::sys::path::append(LLDBPath, "usr", "bin", "lldb");
if (llvm::sys::fs::exists(LLDBPath.str()))
Path = LLDBPath.str().str();
}
}
Bits.DidCheckRelativeToDriver = true;
}
return !Path.empty();
}
Job *LLDB::constructJob(const JobAction &JA,
std::unique_ptr<JobList> Inputs,
std::unique_ptr<CommandOutput> Output,
const ActionList &InputActions,
const ArgList &Args,
const OutputInfo &OI) const {
assert(Inputs->empty());
assert(InputActions.empty());
ArgStringList Arguments;
Arguments.push_back("--repl");
// FIXME: LLDB doesn't currently handle any Swift arguments.
const char *Exec;
if (isPresentRelativeToDriver()) {
Exec = Path.c_str();
} else {
auto &TC = getToolChain();
Exec = TC.getDriver().getProgramPath("lldb", TC).c_str();
}
return new Command(JA, *this, std::move(Inputs), std::move(Output), Exec,
Arguments);
}
/// Darwin Tools
llvm::Triple::ArchType darwin::getArchTypeForDarwinArchName(StringRef Arch) {
return llvm::StringSwitch<llvm::Triple::ArchType>(Arch)
.Cases("i386", "i486", "i486SX", "i586", "i686", llvm::Triple::x86)
.Cases("pentium", "pentpro", "pentIIm3", "pentIIm5", "pentium4",
llvm::Triple::x86)
.Case("x86_64", llvm::Triple::x86_64)
.Case("arm64", llvm::Triple::arm64)
.Cases("arm", "armv4t", "armv5", "armv6", "armv6m", llvm::Triple::arm)
.Cases("armv7", "armv7em", "armv7f", "armv7k", "armv7m", llvm::Triple::arm)
.Cases("armv7s", "xscale", llvm::Triple::arm)
.Default(llvm::Triple::UnknownArch);
}
void darwin::DarwinTool::anchor() {}
void darwin::DarwinTool::AddDarwinArch(const ArgList &Args,
ArgStringList &CmdArgs) const {
StringRef ArchName = getDarwinToolChain().getDarwinArchName(Args);
CmdArgs.push_back("-arch");
CmdArgs.push_back(Args.MakeArgString(ArchName));
}
Job *darwin::Linker::constructJob(const JobAction &JA,
std::unique_ptr<JobList> Inputs,
std::unique_ptr<CommandOutput> Output,
const ActionList &InputActions,
const ArgList &Args,
const OutputInfo &OI) const {
assert(Output->getPrimaryOutputType() == types::TY_Image &&
"Invalid linker output type.");
const toolchains::Darwin &TC = getDarwinToolChain();
const Driver &D = TC.getDriver();
const llvm::Triple &Triple = TC.getTriple();
ArgStringList Arguments;
addPrimaryInputsOfType(Arguments, Inputs.get(), types::TY_Object);
addInputsOfType(Arguments, InputActions, types::TY_Object);
if (Args.hasArg(options::OPT_g)) {
Arguments.push_back("-sectalign");
Arguments.push_back(MachOASTSegmentName);
Arguments.push_back(MachOASTSectionName);
Arguments.push_back("4");
Arguments.push_back("-sectcreate");
Arguments.push_back(MachOASTSegmentName);
Arguments.push_back(MachOASTSectionName);
size_t argCount = Arguments.size();
if (OI.CompilerMode == OutputInfo::Mode::SingleCompile)
addInputsOfType(Arguments, Inputs.get(), types::TY_SwiftModuleFile);
else
addPrimaryInputsOfType(Arguments, Inputs.get(),
types::TY_SwiftModuleFile);
assert(argCount + 1 == Arguments.size() && "no swiftmodule found for -g");
(void)argCount;
}
switch (cast<LinkJobAction>(JA).getKind()) {
case LinkKind::None:
llvm_unreachable("invalid link kind");
case LinkKind::Executable:
// The default for ld; no extra flags necessary.
break;
case LinkKind::DynamicLibrary:
Arguments.push_back("-dylib");
break;
}
if (Args.hasFlag(options::OPT_link_objc_runtime,
options::OPT_no_link_objc_runtime,
/*default=*/true)) {
// FIXME: Copied from Clang's ToolChains.cpp.
llvm::SmallString<128> ARCLiteLib(D.getSwiftProgramPath());
llvm::sys::path::remove_filename(ARCLiteLib); // 'swift'
llvm::sys::path::remove_filename(ARCLiteLib); // 'bin'
llvm::sys::path::append(ARCLiteLib, "lib", "arc", "libarclite_");
ARCLiteLib += getPlatformNameForTriple(Triple);
ARCLiteLib += ".a";
Arguments.push_back("-force_load");
Arguments.push_back(Args.MakeArgString(ARCLiteLib));
}
Args.AddAllArgValues(Arguments, options::OPT_Xlinker);
Args.AddAllArgs(Arguments, options::OPT_linker_option_Group);
Args.AddAllArgs(Arguments, options::OPT_F);
if (Args.hasArg(options::OPT_enable_app_extension)) {
// Keep this string fixed in case the option used by the
// compiler itself changes.
Arguments.push_back("-application_extension");
}
if (!OI.SDKPath.empty()) {
Arguments.push_back("-syslibroot");
Arguments.push_back(Args.MakeArgString(OI.SDKPath));
}
Arguments.push_back("-lSystem");
AddDarwinArch(Args, Arguments);
// Add the runtime library link path, which is platform-specific and found
// relative to the compiler.
// FIXME: Duplicated from CompilerInvocation, but in theory the runtime
// library link path and the standard library module import path don't
// need to be the same.
llvm::SmallString<128> RuntimeLibPath;
if (const Arg *A = Args.getLastArg(options::OPT_resource_dir)) {
RuntimeLibPath = A->getValue();
} else {
RuntimeLibPath = D.getSwiftProgramPath();
llvm::sys::path::remove_filename(RuntimeLibPath); // remove /swift
llvm::sys::path::remove_filename(RuntimeLibPath); // remove /bin
llvm::sys::path::append(RuntimeLibPath, "lib", "swift");
}
llvm::sys::path::append(RuntimeLibPath,
getPlatformNameForTriple(TC.getTriple()));
Arguments.push_back("-L");
Arguments.push_back(Args.MakeArgString(RuntimeLibPath));
// FIXME: We probably shouldn't be adding an rpath here unless we know ahead
// of time the standard library won't be copied.
Arguments.push_back("-rpath");
Arguments.push_back(Args.MakeArgString(RuntimeLibPath));
// FIXME: Properly handle deployment targets.
assert(Triple.isiOS() || Triple.isMacOSX());
if (Triple.isiOS()) {
if (tripleIsiOSSimulator(Triple))
Arguments.push_back("-ios_simulator_version_min");
else
Arguments.push_back("-iphoneos_version_min");
Arguments.push_back("7.0.0");
} else {
Arguments.push_back("-macosx_version_min");
Arguments.push_back("10.8.0");
}
Arguments.push_back("-no_objc_category_merging");
// This should be the last option, for convenience in checking output.
Arguments.push_back("-o");
Arguments.push_back(Output->getPrimaryOutputFilename().c_str());
std::string Exec = D.getProgramPath("ld", getToolChain());
return new Command(JA, *this, std::move(Inputs), std::move(Output),
Args.MakeArgString(Exec), Arguments);
}
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