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 if (!Args.hasArg(options::OPT_shared)) {
80 std::string Dyld = D.DyldPrefix;
81 if (ToolChain.getSanitizerArgs().needsAsanRt() &&
82 ToolChain.getSanitizerArgs().needsSharedRt())
83 Dyld += "asan/";
84 Dyld += "ld.so.1";
85 CmdArgs.push_back("-dynamic-linker");
86 CmdArgs.push_back(Args.MakeArgString(Dyld));
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 if (D.isUsingLTO()) {
104 assert(!Inputs.empty() && "Must have at least one input.");
105 AddGoldPlugin(ToolChain, Args, CmdArgs, Output, Inputs[0],
106 D.getLTOMode() == LTOK_Thin);
107 }
108
109 addSanitizerRuntimes(ToolChain, Args, CmdArgs);
110
111 AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
112 ToolChain.addProfileRTLibs(Args, CmdArgs);
113
114 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
115 if (Args.hasArg(options::OPT_static))
116 CmdArgs.push_back("-Bdynamic");
117
118 if (D.CCCIsCXX()) {
119 if (ToolChain.ShouldLinkCXXStdlib(Args)) {
120 bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
121 !Args.hasArg(options::OPT_static);
122 if (OnlyLibstdcxxStatic)
123 CmdArgs.push_back("-Bstatic");
124 ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
125 if (OnlyLibstdcxxStatic)
126 CmdArgs.push_back("-Bdynamic");
127 }
128 CmdArgs.push_back("-lm");
129 }
130
131 AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
132
133 if (Args.hasArg(options::OPT_pthread) ||
134 Args.hasArg(options::OPT_pthreads))
135 CmdArgs.push_back("-lpthread");
136
137 if (Args.hasArg(options::OPT_fsplit_stack))
138 CmdArgs.push_back("--wrap=pthread_create");
139
140 CmdArgs.push_back("-lc");
141 }
142
143 C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
144 }
145
146 /// Fuchsia - Fuchsia tool chain which can call as(1) and ld(1) directly.
147
Fuchsia(const Driver & D,const llvm::Triple & Triple,const ArgList & Args)148 Fuchsia::Fuchsia(const Driver &D, const llvm::Triple &Triple,
149 const ArgList &Args)
150 : ToolChain(D, Triple, Args) {
151 getProgramPaths().push_back(getDriver().getInstalledDir());
152 if (getDriver().getInstalledDir() != D.Dir)
153 getProgramPaths().push_back(D.Dir);
154
155 if (!D.SysRoot.empty()) {
156 SmallString<128> P(D.SysRoot);
157 llvm::sys::path::append(P, "lib");
158 getFilePaths().push_back(P.str());
159 }
160 }
161
ComputeEffectiveClangTriple(const ArgList & Args,types::ID InputType) const162 std::string Fuchsia::ComputeEffectiveClangTriple(const ArgList &Args,
163 types::ID InputType) const {
164 llvm::Triple Triple(ComputeLLVMTriple(Args, InputType));
165 return (Triple.getArchName() + "-" + Triple.getOSName()).str();
166 }
167
buildLinker() const168 Tool *Fuchsia::buildLinker() const {
169 return new tools::fuchsia::Linker(*this);
170 }
171
GetRuntimeLibType(const ArgList & Args) const172 ToolChain::RuntimeLibType Fuchsia::GetRuntimeLibType(
173 const ArgList &Args) const {
174 if (Arg *A = Args.getLastArg(clang::driver::options::OPT_rtlib_EQ)) {
175 StringRef Value = A->getValue();
176 if (Value != "compiler-rt")
177 getDriver().Diag(clang::diag::err_drv_invalid_rtlib_name)
178 << A->getAsString(Args);
179 }
180
181 return ToolChain::RLT_CompilerRT;
182 }
183
184 ToolChain::CXXStdlibType
GetCXXStdlibType(const ArgList & Args) const185 Fuchsia::GetCXXStdlibType(const ArgList &Args) const {
186 if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
187 StringRef Value = A->getValue();
188 if (Value != "libc++")
189 getDriver().Diag(diag::err_drv_invalid_stdlib_name)
190 << A->getAsString(Args);
191 }
192
193 return ToolChain::CST_Libcxx;
194 }
195
addClangTargetOptions(const ArgList & DriverArgs,ArgStringList & CC1Args,Action::OffloadKind) const196 void Fuchsia::addClangTargetOptions(const ArgList &DriverArgs,
197 ArgStringList &CC1Args,
198 Action::OffloadKind) const {
199 if (DriverArgs.hasFlag(options::OPT_fuse_init_array,
200 options::OPT_fno_use_init_array, true))
201 CC1Args.push_back("-fuse-init-array");
202 }
203
AddClangSystemIncludeArgs(const ArgList & DriverArgs,ArgStringList & CC1Args) const204 void Fuchsia::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
205 ArgStringList &CC1Args) const {
206 const Driver &D = getDriver();
207
208 if (DriverArgs.hasArg(options::OPT_nostdinc))
209 return;
210
211 if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
212 SmallString<128> P(D.ResourceDir);
213 llvm::sys::path::append(P, "include");
214 addSystemInclude(DriverArgs, CC1Args, P);
215 }
216
217 if (DriverArgs.hasArg(options::OPT_nostdlibinc))
218 return;
219
220 // Check for configure-time C include directories.
221 StringRef CIncludeDirs(C_INCLUDE_DIRS);
222 if (CIncludeDirs != "") {
223 SmallVector<StringRef, 5> dirs;
224 CIncludeDirs.split(dirs, ":");
225 for (StringRef dir : dirs) {
226 StringRef Prefix =
227 llvm::sys::path::is_absolute(dir) ? StringRef(D.SysRoot) : "";
228 addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
229 }
230 return;
231 }
232
233 if (!D.SysRoot.empty()) {
234 SmallString<128> P(D.SysRoot);
235 llvm::sys::path::append(P, "include");
236 addExternCSystemInclude(DriverArgs, CC1Args, P.str());
237 }
238 }
239
AddClangCXXStdlibIncludeArgs(const ArgList & DriverArgs,ArgStringList & CC1Args) const240 void Fuchsia::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
241 ArgStringList &CC1Args) const {
242 if (DriverArgs.hasArg(options::OPT_nostdlibinc) ||
243 DriverArgs.hasArg(options::OPT_nostdincxx))
244 return;
245
246 switch (GetCXXStdlibType(DriverArgs)) {
247 case ToolChain::CST_Libcxx: {
248 SmallString<128> P(getDriver().ResourceDir);
249 llvm::sys::path::append(P, "include", "c++", "v1");
250 addSystemInclude(DriverArgs, CC1Args, P.str());
251 break;
252 }
253
254 default:
255 llvm_unreachable("invalid stdlib name");
256 }
257 }
258
AddCXXStdlibLibArgs(const ArgList & Args,ArgStringList & CmdArgs) const259 void Fuchsia::AddCXXStdlibLibArgs(const ArgList &Args,
260 ArgStringList &CmdArgs) const {
261 switch (GetCXXStdlibType(Args)) {
262 case ToolChain::CST_Libcxx:
263 CmdArgs.push_back("-lc++");
264 break;
265
266 case ToolChain::CST_Libstdcxx:
267 llvm_unreachable("invalid stdlib name");
268 }
269 }
270
getSupportedSanitizers() const271 SanitizerMask Fuchsia::getSupportedSanitizers() const {
272 SanitizerMask Res = ToolChain::getSupportedSanitizers();
273 Res |= SanitizerKind::Address;
274 Res |= SanitizerKind::Fuzzer;
275 Res |= SanitizerKind::FuzzerNoLink;
276 Res |= SanitizerKind::SafeStack;
277 Res |= SanitizerKind::Scudo;
278 return Res;
279 }
280
getDefaultSanitizers() const281 SanitizerMask Fuchsia::getDefaultSanitizers() const {
282 return SanitizerKind::SafeStack;
283 }
284