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"
13 #include "clang/Driver/Compilation.h"
14 #include "clang/Driver/Driver.h"
15 #include "clang/Driver/DriverDiagnostic.h"
16 #include "clang/Driver/Options.h"
17 #include "clang/Driver/SanitizerArgs.h"
18 #include "llvm/Option/ArgList.h"
19 #include "llvm/Support/Path.h"
20
21 using namespace clang::driver;
22 using namespace clang::driver::toolchains;
23 using namespace clang::driver::tools;
24 using namespace clang;
25 using namespace llvm::opt;
26
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const27 void fuchsia::Linker::ConstructJob(Compilation &C, const JobAction &JA,
28 const InputInfo &Output,
29 const InputInfoList &Inputs,
30 const ArgList &Args,
31 const char *LinkingOutput) const {
32 const toolchains::Fuchsia &ToolChain =
33 static_cast<const toolchains::Fuchsia &>(getToolChain());
34 const Driver &D = ToolChain.getDriver();
35
36 ArgStringList CmdArgs;
37
38 // Silence warning for "clang -g foo.o -o foo"
39 Args.ClaimAllArgs(options::OPT_g_Group);
40 // and "clang -emit-llvm foo.o -o foo"
41 Args.ClaimAllArgs(options::OPT_emit_llvm);
42 // and for "clang -w foo.o -o foo". Other warning options are already
43 // handled somewhere else.
44 Args.ClaimAllArgs(options::OPT_w);
45
46 const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
47 if (llvm::sys::path::filename(Exec).equals_lower("ld.lld") ||
48 llvm::sys::path::stem(Exec).equals_lower("ld.lld")) {
49 CmdArgs.push_back("-z");
50 CmdArgs.push_back("rodynamic");
51 }
52
53 if (!D.SysRoot.empty())
54 CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
55
56 if (!Args.hasArg(options::OPT_shared) && !Args.hasArg(options::OPT_r))
57 CmdArgs.push_back("-pie");
58
59 if (Args.hasArg(options::OPT_rdynamic))
60 CmdArgs.push_back("-export-dynamic");
61
62 if (Args.hasArg(options::OPT_s))
63 CmdArgs.push_back("-s");
64
65 if (Args.hasArg(options::OPT_r)) {
66 CmdArgs.push_back("-r");
67 } else {
68 CmdArgs.push_back("--build-id");
69 CmdArgs.push_back("--hash-style=gnu");
70 }
71
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 const SanitizerArgs &SanArgs = ToolChain.getSanitizerArgs();
80
81 if (!Args.hasArg(options::OPT_shared)) {
82 std::string Dyld = D.DyldPrefix;
83 if (SanArgs.needsAsanRt() && SanArgs.needsSharedRt())
84 Dyld += "asan/";
85 Dyld += "ld.so.1";
86 CmdArgs.push_back("-dynamic-linker");
87 CmdArgs.push_back(Args.MakeArgString(Dyld));
88 }
89
90 CmdArgs.push_back("-o");
91 CmdArgs.push_back(Output.getFilename());
92
93 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
94 if (!Args.hasArg(options::OPT_shared)) {
95 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("Scrt1.o")));
96 }
97 }
98
99 Args.AddAllArgs(CmdArgs, options::OPT_L);
100 Args.AddAllArgs(CmdArgs, options::OPT_u);
101
102 addSanitizerPathLibArgs(ToolChain, Args, CmdArgs);
103
104 ToolChain.AddFilePathLibArgs(Args, CmdArgs);
105
106 if (D.isUsingLTO()) {
107 assert(!Inputs.empty() && "Must have at least one input.");
108 AddGoldPlugin(ToolChain, Args, CmdArgs, Output, Inputs[0],
109 D.getLTOMode() == LTOK_Thin);
110 }
111
112 bool NeedsSanitizerDeps = addSanitizerRuntimes(ToolChain, Args, CmdArgs);
113 bool NeedsXRayDeps = addXRayRuntime(ToolChain, Args, CmdArgs);
114 AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
115 ToolChain.addProfileRTLibs(Args, CmdArgs);
116
117 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
118 if (Args.hasArg(options::OPT_static))
119 CmdArgs.push_back("-Bdynamic");
120
121 if (D.CCCIsCXX()) {
122 if (ToolChain.ShouldLinkCXXStdlib(Args)) {
123 bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
124 !Args.hasArg(options::OPT_static);
125 CmdArgs.push_back("--push-state");
126 CmdArgs.push_back("--as-needed");
127 if (OnlyLibstdcxxStatic)
128 CmdArgs.push_back("-Bstatic");
129 ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
130 if (OnlyLibstdcxxStatic)
131 CmdArgs.push_back("-Bdynamic");
132 CmdArgs.push_back("-lm");
133 CmdArgs.push_back("--pop-state");
134 }
135 }
136
137 if (NeedsSanitizerDeps)
138 linkSanitizerRuntimeDeps(ToolChain, CmdArgs);
139
140 if (NeedsXRayDeps)
141 linkXRayRuntimeDeps(ToolChain, CmdArgs);
142
143 AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
144
145 if (Args.hasArg(options::OPT_pthread) ||
146 Args.hasArg(options::OPT_pthreads))
147 CmdArgs.push_back("-lpthread");
148
149 if (Args.hasArg(options::OPT_fsplit_stack))
150 CmdArgs.push_back("--wrap=pthread_create");
151
152 CmdArgs.push_back("-lc");
153 }
154
155 C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
156 }
157
158 /// Fuchsia - Fuchsia tool chain which can call as(1) and ld(1) directly.
159
Fuchsia(const Driver & D,const llvm::Triple & Triple,const ArgList & Args)160 Fuchsia::Fuchsia(const Driver &D, const llvm::Triple &Triple,
161 const ArgList &Args)
162 : ToolChain(D, Triple, Args) {
163 getProgramPaths().push_back(getDriver().getInstalledDir());
164 if (getDriver().getInstalledDir() != D.Dir)
165 getProgramPaths().push_back(D.Dir);
166
167 if (!D.SysRoot.empty()) {
168 SmallString<128> P(D.SysRoot);
169 llvm::sys::path::append(P, "lib");
170 getFilePaths().push_back(P.str());
171 }
172 }
173
ComputeEffectiveClangTriple(const ArgList & Args,types::ID InputType) const174 std::string Fuchsia::ComputeEffectiveClangTriple(const ArgList &Args,
175 types::ID InputType) const {
176 llvm::Triple Triple(ComputeLLVMTriple(Args, InputType));
177 return (Triple.getArchName() + "-" + Triple.getOSName()).str();
178 }
179
buildLinker() const180 Tool *Fuchsia::buildLinker() const {
181 return new tools::fuchsia::Linker(*this);
182 }
183
GetRuntimeLibType(const ArgList & Args) const184 ToolChain::RuntimeLibType Fuchsia::GetRuntimeLibType(
185 const ArgList &Args) const {
186 if (Arg *A = Args.getLastArg(clang::driver::options::OPT_rtlib_EQ)) {
187 StringRef Value = A->getValue();
188 if (Value != "compiler-rt")
189 getDriver().Diag(clang::diag::err_drv_invalid_rtlib_name)
190 << A->getAsString(Args);
191 }
192
193 return ToolChain::RLT_CompilerRT;
194 }
195
196 ToolChain::CXXStdlibType
GetCXXStdlibType(const ArgList & Args) const197 Fuchsia::GetCXXStdlibType(const ArgList &Args) const {
198 if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
199 StringRef Value = A->getValue();
200 if (Value != "libc++")
201 getDriver().Diag(diag::err_drv_invalid_stdlib_name)
202 << A->getAsString(Args);
203 }
204
205 return ToolChain::CST_Libcxx;
206 }
207
addClangTargetOptions(const ArgList & DriverArgs,ArgStringList & CC1Args,Action::OffloadKind) const208 void Fuchsia::addClangTargetOptions(const ArgList &DriverArgs,
209 ArgStringList &CC1Args,
210 Action::OffloadKind) const {
211 if (DriverArgs.hasFlag(options::OPT_fuse_init_array,
212 options::OPT_fno_use_init_array, true))
213 CC1Args.push_back("-fuse-init-array");
214 }
215
AddClangSystemIncludeArgs(const ArgList & DriverArgs,ArgStringList & CC1Args) const216 void Fuchsia::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
217 ArgStringList &CC1Args) const {
218 const Driver &D = getDriver();
219
220 if (DriverArgs.hasArg(options::OPT_nostdinc))
221 return;
222
223 if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
224 SmallString<128> P(D.ResourceDir);
225 llvm::sys::path::append(P, "include");
226 addSystemInclude(DriverArgs, CC1Args, P);
227 }
228
229 if (DriverArgs.hasArg(options::OPT_nostdlibinc))
230 return;
231
232 // Check for configure-time C include directories.
233 StringRef CIncludeDirs(C_INCLUDE_DIRS);
234 if (CIncludeDirs != "") {
235 SmallVector<StringRef, 5> dirs;
236 CIncludeDirs.split(dirs, ":");
237 for (StringRef dir : dirs) {
238 StringRef Prefix =
239 llvm::sys::path::is_absolute(dir) ? StringRef(D.SysRoot) : "";
240 addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
241 }
242 return;
243 }
244
245 if (!D.SysRoot.empty()) {
246 SmallString<128> P(D.SysRoot);
247 llvm::sys::path::append(P, "include");
248 addExternCSystemInclude(DriverArgs, CC1Args, P.str());
249 }
250 }
251
AddClangCXXStdlibIncludeArgs(const ArgList & DriverArgs,ArgStringList & CC1Args) const252 void Fuchsia::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
253 ArgStringList &CC1Args) const {
254 if (DriverArgs.hasArg(options::OPT_nostdlibinc) ||
255 DriverArgs.hasArg(options::OPT_nostdincxx))
256 return;
257
258 switch (GetCXXStdlibType(DriverArgs)) {
259 case ToolChain::CST_Libcxx: {
260 SmallString<128> P(getDriver().ResourceDir);
261 llvm::sys::path::append(P, "include", "c++", "v1");
262 addSystemInclude(DriverArgs, CC1Args, P.str());
263 break;
264 }
265
266 default:
267 llvm_unreachable("invalid stdlib name");
268 }
269 }
270
AddCXXStdlibLibArgs(const ArgList & Args,ArgStringList & CmdArgs) const271 void Fuchsia::AddCXXStdlibLibArgs(const ArgList &Args,
272 ArgStringList &CmdArgs) const {
273 switch (GetCXXStdlibType(Args)) {
274 case ToolChain::CST_Libcxx:
275 CmdArgs.push_back("-lc++");
276 break;
277
278 case ToolChain::CST_Libstdcxx:
279 llvm_unreachable("invalid stdlib name");
280 }
281 }
282
getSupportedSanitizers() const283 SanitizerMask Fuchsia::getSupportedSanitizers() const {
284 SanitizerMask Res = ToolChain::getSupportedSanitizers();
285 Res |= SanitizerKind::Address;
286 Res |= SanitizerKind::Fuzzer;
287 Res |= SanitizerKind::FuzzerNoLink;
288 Res |= SanitizerKind::SafeStack;
289 Res |= SanitizerKind::Scudo;
290 return Res;
291 }
292
getDefaultSanitizers() const293 SanitizerMask Fuchsia::getDefaultSanitizers() const {
294 return SanitizerKind::SafeStack;
295 }
296