clang  5.0.0
Fuchsia.cpp
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1 //===--- Fuchsia.cpp - Fuchsia ToolChain Implementations --------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "Fuchsia.h"
11 #include "CommonArgs.h"
12 #include "clang/Config/config.h"
14 #include "clang/Driver/Driver.h"
16 #include "clang/Driver/Options.h"
17 #include "llvm/Option/ArgList.h"
18 #include "llvm/Support/Path.h"
19 
20 using namespace clang::driver;
21 using namespace clang::driver::toolchains;
22 using namespace clang::driver::tools;
23 using namespace clang;
24 using namespace llvm::opt;
25 
26 void fuchsia::Linker::ConstructJob(Compilation &C, const JobAction &JA,
27  const InputInfo &Output,
28  const InputInfoList &Inputs,
29  const ArgList &Args,
30  const char *LinkingOutput) const {
32  static_cast<const toolchains::Fuchsia &>(getToolChain());
33  const Driver &D = ToolChain.getDriver();
34 
35  ArgStringList CmdArgs;
36 
37  // Silence warning for "clang -g foo.o -o foo"
38  Args.ClaimAllArgs(options::OPT_g_Group);
39  // and "clang -emit-llvm foo.o -o foo"
40  Args.ClaimAllArgs(options::OPT_emit_llvm);
41  // and for "clang -w foo.o -o foo". Other warning options are already
42  // handled somewhere else.
43  Args.ClaimAllArgs(options::OPT_w);
44 
45  const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
46  if (llvm::sys::path::stem(Exec).equals_lower("lld")) {
47  CmdArgs.push_back("-flavor");
48  CmdArgs.push_back("gnu");
49 
50  CmdArgs.push_back("-z");
51  CmdArgs.push_back("rodynamic");
52  }
53 
54  if (!D.SysRoot.empty())
55  CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
56 
57  if (!Args.hasArg(options::OPT_shared) && !Args.hasArg(options::OPT_r))
58  CmdArgs.push_back("-pie");
59 
60  if (Args.hasArg(options::OPT_rdynamic))
61  CmdArgs.push_back("-export-dynamic");
62 
63  if (Args.hasArg(options::OPT_s))
64  CmdArgs.push_back("-s");
65 
66  if (Args.hasArg(options::OPT_r))
67  CmdArgs.push_back("-r");
68  else
69  CmdArgs.push_back("--build-id");
70 
71  if (!Args.hasArg(options::OPT_static))
72  CmdArgs.push_back("--eh-frame-hdr");
73 
74  if (Args.hasArg(options::OPT_static))
75  CmdArgs.push_back("-Bstatic");
76  else if (Args.hasArg(options::OPT_shared))
77  CmdArgs.push_back("-shared");
78 
79  if (!Args.hasArg(options::OPT_static)) {
80  if (Args.hasArg(options::OPT_rdynamic))
81  CmdArgs.push_back("-export-dynamic");
82 
83  if (!Args.hasArg(options::OPT_shared)) {
84  CmdArgs.push_back("-dynamic-linker");
85  CmdArgs.push_back(Args.MakeArgString(D.DyldPrefix + "ld.so.1"));
86  }
87  }
88 
89  CmdArgs.push_back("-o");
90  CmdArgs.push_back(Output.getFilename());
91 
92  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
93  if (!Args.hasArg(options::OPT_shared)) {
94  CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("Scrt1.o")));
95  }
96  }
97 
98  Args.AddAllArgs(CmdArgs, options::OPT_L);
99  Args.AddAllArgs(CmdArgs, options::OPT_u);
100 
101  ToolChain.AddFilePathLibArgs(Args, CmdArgs);
102 
103  AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
104 
105  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
106  if (Args.hasArg(options::OPT_static))
107  CmdArgs.push_back("-Bdynamic");
108 
109  if (D.CCCIsCXX()) {
110  bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
111  !Args.hasArg(options::OPT_static);
112  if (OnlyLibstdcxxStatic)
113  CmdArgs.push_back("-Bstatic");
114  ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
115  if (OnlyLibstdcxxStatic)
116  CmdArgs.push_back("-Bdynamic");
117  CmdArgs.push_back("-lm");
118  }
119 
120  AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
121 
122  if (Args.hasArg(options::OPT_pthread) ||
123  Args.hasArg(options::OPT_pthreads))
124  CmdArgs.push_back("-lpthread");
125 
126  if (Args.hasArg(options::OPT_fsplit_stack))
127  CmdArgs.push_back("--wrap=pthread_create");
128 
129  CmdArgs.push_back("-lc");
130  }
131 
132  C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
133 }
134 
135 /// Fuchsia - Fuchsia tool chain which can call as(1) and ld(1) directly.
136 
137 static std::string normalizeTriple(llvm::Triple Triple) {
138  SmallString<64> T;
139  T += Triple.getArchName();
140  T += "-";
141  T += Triple.getOSName();
142  return T.str();
143 }
144 
145 static std::string getTargetDir(const Driver &D,
146  llvm::Triple Triple) {
147  SmallString<128> P(llvm::sys::path::parent_path(D.Dir));
148  llvm::sys::path::append(P, "lib", normalizeTriple(Triple));
149  return P.str();
150 }
151 
152 Fuchsia::Fuchsia(const Driver &D, const llvm::Triple &Triple,
153  const ArgList &Args)
154  : ToolChain(D, Triple, Args) {
155  getProgramPaths().push_back(getDriver().getInstalledDir());
156  if (getDriver().getInstalledDir() != D.Dir)
157  getProgramPaths().push_back(D.Dir);
158 
160  llvm::sys::path::append(P, "lib");
161  getFilePaths().push_back(P.str());
162 
163  if (!D.SysRoot.empty()) {
165  llvm::sys::path::append(P, "lib");
166  getFilePaths().push_back(P.str());
167  }
168 }
169 
170 std::string Fuchsia::ComputeEffectiveClangTriple(const ArgList &Args,
171  types::ID InputType) const {
172  llvm::Triple Triple(ComputeLLVMTriple(Args, InputType));
173  Triple.setTriple(normalizeTriple(Triple));
174  return Triple.getTriple();
175 }
176 
178  return new tools::fuchsia::Linker(*this);
179 }
180 
182  const ArgList &Args) const {
183  if (Arg *A = Args.getLastArg(clang::driver::options::OPT_rtlib_EQ)) {
184  StringRef Value = A->getValue();
185  if (Value != "compiler-rt")
186  getDriver().Diag(clang::diag::err_drv_invalid_rtlib_name)
187  << A->getAsString(Args);
188  }
189 
191 }
192 
194 Fuchsia::GetCXXStdlibType(const ArgList &Args) const {
195  if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
196  StringRef Value = A->getValue();
197  if (Value != "libc++")
198  getDriver().Diag(diag::err_drv_invalid_stdlib_name)
199  << A->getAsString(Args);
200  }
201 
202  return ToolChain::CST_Libcxx;
203 }
204 
205 void Fuchsia::addClangTargetOptions(const ArgList &DriverArgs,
206  ArgStringList &CC1Args,
207  Action::OffloadKind) const {
208  if (DriverArgs.hasFlag(options::OPT_fuse_init_array,
209  options::OPT_fno_use_init_array, true))
210  CC1Args.push_back("-fuse-init-array");
211 }
212 
213 void Fuchsia::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
214  ArgStringList &CC1Args) const {
215  const Driver &D = getDriver();
216 
217  if (DriverArgs.hasArg(options::OPT_nostdinc))
218  return;
219 
220  if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
222  llvm::sys::path::append(P, "include");
223  addSystemInclude(DriverArgs, CC1Args, P);
224  }
225 
226  if (DriverArgs.hasArg(options::OPT_nostdlibinc))
227  return;
228 
229  // Check for configure-time C include directories.
230  StringRef CIncludeDirs(C_INCLUDE_DIRS);
231  if (CIncludeDirs != "") {
233  CIncludeDirs.split(dirs, ":");
234  for (StringRef dir : dirs) {
235  StringRef Prefix =
236  llvm::sys::path::is_absolute(dir) ? StringRef(D.SysRoot) : "";
237  addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
238  }
239  return;
240  }
241 
242  if (!D.SysRoot.empty()) {
244  llvm::sys::path::append(P, "include");
245  addExternCSystemInclude(DriverArgs, CC1Args, P.str());
246  }
247 }
248 
249 void Fuchsia::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
250  ArgStringList &CC1Args) const {
251  if (DriverArgs.hasArg(options::OPT_nostdlibinc) ||
252  DriverArgs.hasArg(options::OPT_nostdincxx))
253  return;
254 
255  switch (GetCXXStdlibType(DriverArgs)) {
256  case ToolChain::CST_Libcxx: {
258  llvm::sys::path::append(P, "include", "c++", "v1");
259  addSystemInclude(DriverArgs, CC1Args, P.str());
260  break;
261  }
262 
263  default:
264  llvm_unreachable("invalid stdlib name");
265  }
266 }
267 
268 void Fuchsia::AddCXXStdlibLibArgs(const ArgList &Args,
269  ArgStringList &CmdArgs) const {
270  switch (GetCXXStdlibType(Args)) {
272  CmdArgs.push_back("-lc++");
273  CmdArgs.push_back("-lc++abi");
274  CmdArgs.push_back("-lunwind");
275  break;
276 
278  llvm_unreachable("invalid stdlib name");
279  }
280 }
281 
284  Res |= SanitizerKind::SafeStack;
285  return Res;
286 }
const llvm::Triple & getTriple() const
Definition: ToolChain.h:144
static void addExternCSystemInclude(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, const Twine &Path)
Utility function to add a system include directory with extern "C" semantics to CC1 arguments...
Definition: ToolChain.cpp:613
StringRef P
std::string DyldPrefix
Dynamic loader prefix, if present.
Definition: Driver.h:149
void AddRunTimeLibs(const ToolChain &TC, const Driver &D, llvm::opt::ArgStringList &CmdArgs, const llvm::opt::ArgList &Args)
DiagnosticBuilder Diag(unsigned DiagID) const
Definition: Driver.h:116
void AddClangCXXStdlibIncludeArgs(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const override
AddClangCXXStdlibIncludeArgs - Add the clang -cc1 level arguments to set the include paths to use for...
Definition: Fuchsia.cpp:249
virtual SanitizerMask getSupportedSanitizers() const
Return sanitizers which are available in this toolchain.
Definition: ToolChain.cpp:702
bool CCCIsCXX() const
Whether the driver should follow g++ like behavior.
Definition: Driver.h:174
path_list & getProgramPaths()
Definition: ToolChain.h:175
std::string Dir
The path the driver executable was in, as invoked from the command line.
Definition: Driver.h:127
InputInfo - Wrapper for information about an input source.
Definition: InputInfo.h:23
path_list & getFilePaths()
Definition: ToolChain.h:172
Driver - Encapsulate logic for constructing compilation processes from a set of gcc-driver-like comma...
Definition: Driver.h:65
const Driver & getDriver() const
Definition: ToolChain.h:142
Tool * buildLinker() const override
Definition: Fuchsia.cpp:177
RuntimeLibType GetRuntimeLibType(const llvm::opt::ArgList &Args) const override
Definition: Fuchsia.cpp:181
void addCommand(std::unique_ptr< Command > C)
Definition: Compilation.h:189
virtual std::string ComputeLLVMTriple(const llvm::opt::ArgList &Args, types::ID InputType=types::TY_INVALID) const
ComputeLLVMTriple - Return the LLVM target triple to use, after taking command line arguments into ac...
Definition: ToolChain.cpp:447
void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const override
AddCXXStdlibLibArgs - Add the system specific linker arguments to use for the given C++ standard libr...
Definition: Fuchsia.cpp:268
const char * getFilename() const
Definition: InputInfo.h:84
SanitizerMask getSupportedSanitizers() const override
Return sanitizers which are available in this toolchain.
Definition: Fuchsia.cpp:282
void AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const override
Add the clang cc1 arguments for system include paths.
Definition: Fuchsia.cpp:213
static void addSystemInclude(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, const Twine &Path)
Utility function to add a system include directory to CC1 arguments.
Definition: ToolChain.cpp:598
static std::string getTargetDir(const Driver &D, llvm::Triple Triple)
Definition: Fuchsia.cpp:145
uint64_t SanitizerMask
Definition: Sanitizers.h:24
void AddLinkerInputs(const ToolChain &TC, const InputInfoList &Inputs, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs, const JobAction &JA)
std::string SysRoot
sysroot, if present
Definition: Driver.h:146
Tool - Information on a specific compilation tool.
Definition: Tool.h:34
Compilation - A set of tasks to perform for a single driver invocation.
Definition: Compilation.h:34
void AddFilePathLibArgs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const
AddFilePathLibArgs - Add each thing in getFilePaths() as a "-L" option.
Definition: ToolChain.cpp:666
std::string ComputeEffectiveClangTriple(const llvm::opt::ArgList &Args, types::ID InputType) const override
ComputeEffectiveClangTriple - Return the Clang triple to use for this target, which may take into acc...
Definition: Fuchsia.cpp:170
void addClangTargetOptions(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, Action::OffloadKind DeviceOffloadKind) const override
Add options that need to be passed to cc1 for this target.
Definition: Fuchsia.cpp:205
static std::string normalizeTriple(llvm::Triple Triple)
Fuchsia - Fuchsia tool chain which can call as(1) and ld(1) directly.
Definition: Fuchsia.cpp:137
CXXStdlibType GetCXXStdlibType(const llvm::opt::ArgList &Args) const override
Definition: Fuchsia.cpp:194
std::string GetLinkerPath() const
Returns the linker path, respecting the -fuse-ld= argument to determine the linker suffix or name...
Definition: ToolChain.cpp:375
std::string GetFilePath(const char *Name) const
Definition: ToolChain.cpp:367
Fuchsia(const Driver &D, const llvm::Triple &Triple, const llvm::opt::ArgList &Args)
Definition: Fuchsia.cpp:152
ToolChain - Access to tools for a single platform.
Definition: ToolChain.h:50
std::string ResourceDir
The path to the compiler resource directory.
Definition: Driver.h:136