xref: /freebsd/contrib/llvm-project/clang/lib/Driver/ToolChains/Solaris.cpp (revision 7ef62cebc2f965b0f640263e179276928885e33d)
1 //===--- Solaris.cpp - Solaris ToolChain Implementations --------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "Solaris.h"
10 #include "CommonArgs.h"
11 #include "clang/Basic/LangStandard.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 "clang/Driver/ToolChain.h"
19 #include "llvm/Option/ArgList.h"
20 #include "llvm/Support/FileSystem.h"
21 #include "llvm/Support/Path.h"
22 
23 using namespace clang::driver;
24 using namespace clang::driver::tools;
25 using namespace clang::driver::toolchains;
26 using namespace clang;
27 using namespace llvm::opt;
28 
29 void solaris::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
30                                       const InputInfo &Output,
31                                       const InputInfoList &Inputs,
32                                       const ArgList &Args,
33                                       const char *LinkingOutput) const {
34   claimNoWarnArgs(Args);
35   ArgStringList CmdArgs;
36 
37   Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
38 
39   CmdArgs.push_back("-o");
40   CmdArgs.push_back(Output.getFilename());
41 
42   for (const auto &II : Inputs)
43     CmdArgs.push_back(II.getFilename());
44 
45   const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
46   C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(),
47                                          Exec, CmdArgs, Inputs, Output));
48 }
49 
50 void solaris::Linker::ConstructJob(Compilation &C, const JobAction &JA,
51                                    const InputInfo &Output,
52                                    const InputInfoList &Inputs,
53                                    const ArgList &Args,
54                                    const char *LinkingOutput) const {
55   ArgStringList CmdArgs;
56 
57   // Demangle C++ names in errors
58   CmdArgs.push_back("-C");
59 
60   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_shared)) {
61     CmdArgs.push_back("-e");
62     CmdArgs.push_back("_start");
63   }
64 
65   if (Args.hasArg(options::OPT_static)) {
66     CmdArgs.push_back("-Bstatic");
67     CmdArgs.push_back("-dn");
68   } else {
69     CmdArgs.push_back("-Bdynamic");
70     if (Args.hasArg(options::OPT_shared)) {
71       CmdArgs.push_back("-shared");
72     }
73 
74     // libpthread has been folded into libc since Solaris 10, no need to do
75     // anything for pthreads. Claim argument to avoid warning.
76     Args.ClaimAllArgs(options::OPT_pthread);
77     Args.ClaimAllArgs(options::OPT_pthreads);
78   }
79 
80   if (Output.isFilename()) {
81     CmdArgs.push_back("-o");
82     CmdArgs.push_back(Output.getFilename());
83   } else {
84     assert(Output.isNothing() && "Invalid output.");
85   }
86 
87   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,
88                    options::OPT_r)) {
89     if (!Args.hasArg(options::OPT_shared))
90       CmdArgs.push_back(
91           Args.MakeArgString(getToolChain().GetFilePath("crt1.o")));
92 
93     CmdArgs.push_back(Args.MakeArgString(getToolChain().GetFilePath("crti.o")));
94 
95     const Arg *Std = Args.getLastArg(options::OPT_std_EQ, options::OPT_ansi);
96     bool HaveAnsi = false;
97     const LangStandard *LangStd = nullptr;
98     if (Std) {
99       HaveAnsi = Std->getOption().matches(options::OPT_ansi);
100       if (!HaveAnsi)
101         LangStd = LangStandard::getLangStandardForName(Std->getValue());
102     }
103 
104     const char *values_X = "values-Xa.o";
105     // Use values-Xc.o for -ansi, -std=c*, -std=iso9899:199409.
106     if (HaveAnsi || (LangStd && !LangStd->isGNUMode()))
107       values_X = "values-Xc.o";
108     CmdArgs.push_back(Args.MakeArgString(getToolChain().GetFilePath(values_X)));
109 
110     const char *values_xpg = "values-xpg6.o";
111     // Use values-xpg4.o for -std=c90, -std=gnu90, -std=iso9899:199409.
112     if (LangStd && LangStd->getLanguage() == Language::C && !LangStd->isC99())
113       values_xpg = "values-xpg4.o";
114     CmdArgs.push_back(
115         Args.MakeArgString(getToolChain().GetFilePath(values_xpg)));
116     CmdArgs.push_back(
117         Args.MakeArgString(getToolChain().GetFilePath("crtbegin.o")));
118     // Add crtfastmath.o if available and fast math is enabled.
119     getToolChain().addFastMathRuntimeIfAvailable(Args, CmdArgs);
120   }
121 
122   getToolChain().AddFilePathLibArgs(Args, CmdArgs);
123 
124   Args.AddAllArgs(CmdArgs, {options::OPT_L, options::OPT_T_Group,
125                             options::OPT_e, options::OPT_r});
126 
127   bool NeedsSanitizerDeps = addSanitizerRuntimes(getToolChain(), Args, CmdArgs);
128   AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
129 
130   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs,
131                    options::OPT_r)) {
132     if (getToolChain().ShouldLinkCXXStdlib(Args))
133       getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
134     if (Args.hasArg(options::OPT_fstack_protector) ||
135         Args.hasArg(options::OPT_fstack_protector_strong) ||
136         Args.hasArg(options::OPT_fstack_protector_all)) {
137       // Explicitly link ssp libraries, not folded into Solaris libc.
138       CmdArgs.push_back("-lssp_nonshared");
139       CmdArgs.push_back("-lssp");
140     }
141     // LLVM support for atomics on 32-bit SPARC V8+ is incomplete, so
142     // forcibly link with libatomic as a workaround.
143     if (getToolChain().getTriple().getArch() == llvm::Triple::sparc) {
144       CmdArgs.push_back(getAsNeededOption(getToolChain(), true));
145       CmdArgs.push_back("-latomic");
146       CmdArgs.push_back(getAsNeededOption(getToolChain(), false));
147     }
148     CmdArgs.push_back("-lgcc_s");
149     CmdArgs.push_back("-lc");
150     if (!Args.hasArg(options::OPT_shared)) {
151       CmdArgs.push_back("-lgcc");
152       CmdArgs.push_back("-lm");
153     }
154     if (NeedsSanitizerDeps) {
155       linkSanitizerRuntimeDeps(getToolChain(), CmdArgs);
156 
157       // Work around Solaris/amd64 ld bug when calling __tls_get_addr directly.
158       // However, ld -z relax=transtls is available since Solaris 11.2, but not
159       // in Illumos.
160       const SanitizerArgs &SA = getToolChain().getSanitizerArgs(Args);
161       if (getToolChain().getTriple().getArch() == llvm::Triple::x86_64 &&
162           (SA.needsAsanRt() || SA.needsStatsRt() ||
163            (SA.needsUbsanRt() && !SA.requiresMinimalRuntime())))
164         CmdArgs.push_back("-zrelax=transtls");
165     }
166   }
167 
168   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,
169                    options::OPT_r)) {
170     CmdArgs.push_back(
171         Args.MakeArgString(getToolChain().GetFilePath("crtend.o")));
172     CmdArgs.push_back(
173         Args.MakeArgString(getToolChain().GetFilePath("crtn.o")));
174   }
175 
176   getToolChain().addProfileRTLibs(Args, CmdArgs);
177 
178   const char *Exec = Args.MakeArgString(getToolChain().GetLinkerPath());
179   C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(),
180                                          Exec, CmdArgs, Inputs, Output));
181 }
182 
183 static StringRef getSolarisLibSuffix(const llvm::Triple &Triple) {
184   switch (Triple.getArch()) {
185   case llvm::Triple::x86:
186   case llvm::Triple::sparc:
187     break;
188   case llvm::Triple::x86_64:
189     return "/amd64";
190   case llvm::Triple::sparcv9:
191     return "/sparcv9";
192   default:
193     llvm_unreachable("Unsupported architecture");
194   }
195   return "";
196 }
197 
198 /// Solaris - Solaris tool chain which can call as(1) and ld(1) directly.
199 
200 Solaris::Solaris(const Driver &D, const llvm::Triple &Triple,
201                  const ArgList &Args)
202     : Generic_ELF(D, Triple, Args) {
203 
204   GCCInstallation.init(Triple, Args);
205 
206   StringRef LibSuffix = getSolarisLibSuffix(Triple);
207   path_list &Paths = getFilePaths();
208   if (GCCInstallation.isValid()) {
209     // On Solaris gcc uses both an architecture-specific path with triple in it
210     // as well as a more generic lib path (+arch suffix).
211     addPathIfExists(D,
212                     GCCInstallation.getInstallPath() +
213                         GCCInstallation.getMultilib().gccSuffix(),
214                     Paths);
215     addPathIfExists(D, GCCInstallation.getParentLibPath() + LibSuffix, Paths);
216   }
217 
218   // If we are currently running Clang inside of the requested system root,
219   // add its parent library path to those searched.
220   if (StringRef(D.Dir).startswith(D.SysRoot))
221     addPathIfExists(D, D.Dir + "/../lib", Paths);
222 
223   addPathIfExists(D, D.SysRoot + "/usr/lib" + LibSuffix, Paths);
224 }
225 
226 SanitizerMask Solaris::getSupportedSanitizers() const {
227   const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
228   const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
229   SanitizerMask Res = ToolChain::getSupportedSanitizers();
230   // FIXME: Omit X86_64 until 64-bit support is figured out.
231   if (IsX86) {
232     Res |= SanitizerKind::Address;
233     Res |= SanitizerKind::PointerCompare;
234     Res |= SanitizerKind::PointerSubtract;
235   }
236   if (IsX86 || IsX86_64)
237     Res |= SanitizerKind::Function;
238   Res |= SanitizerKind::Vptr;
239   return Res;
240 }
241 
242 Tool *Solaris::buildAssembler() const {
243   return new tools::solaris::Assembler(*this);
244 }
245 
246 Tool *Solaris::buildLinker() const { return new tools::solaris::Linker(*this); }
247 
248 void Solaris::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
249                                         ArgStringList &CC1Args) const {
250   const Driver &D = getDriver();
251 
252   if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
253     return;
254 
255   if (!DriverArgs.hasArg(options::OPT_nostdlibinc))
256     addSystemInclude(DriverArgs, CC1Args, D.SysRoot + "/usr/local/include");
257 
258   if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
259     SmallString<128> P(D.ResourceDir);
260     llvm::sys::path::append(P, "include");
261     addSystemInclude(DriverArgs, CC1Args, P);
262   }
263 
264   if (DriverArgs.hasArg(options::OPT_nostdlibinc))
265     return;
266 
267   // Check for configure-time C include directories.
268   StringRef CIncludeDirs(C_INCLUDE_DIRS);
269   if (CIncludeDirs != "") {
270     SmallVector<StringRef, 5> dirs;
271     CIncludeDirs.split(dirs, ":");
272     for (StringRef dir : dirs) {
273       StringRef Prefix =
274           llvm::sys::path::is_absolute(dir) ? "" : StringRef(D.SysRoot);
275       addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
276     }
277     return;
278   }
279 
280   // Add include directories specific to the selected multilib set and multilib.
281   if (GCCInstallation.isValid()) {
282     const MultilibSet::IncludeDirsFunc &Callback =
283         Multilibs.includeDirsCallback();
284     if (Callback) {
285       for (const auto &Path : Callback(GCCInstallation.getMultilib()))
286         addExternCSystemIncludeIfExists(
287             DriverArgs, CC1Args, GCCInstallation.getInstallPath() + Path);
288     }
289   }
290 
291   addExternCSystemInclude(DriverArgs, CC1Args, D.SysRoot + "/usr/include");
292 }
293 
294 void Solaris::addLibStdCxxIncludePaths(
295     const llvm::opt::ArgList &DriverArgs,
296     llvm::opt::ArgStringList &CC1Args) const {
297   // We need a detected GCC installation on Solaris (similar to Linux)
298   // to provide libstdc++'s headers.
299   if (!GCCInstallation.isValid())
300     return;
301 
302   // By default, look for the C++ headers in an include directory adjacent to
303   // the lib directory of the GCC installation.
304   // On Solaris this usually looks like /usr/gcc/X.Y/include/c++/X.Y.Z
305   StringRef LibDir = GCCInstallation.getParentLibPath();
306   StringRef TripleStr = GCCInstallation.getTriple().str();
307   const Multilib &Multilib = GCCInstallation.getMultilib();
308   const GCCVersion &Version = GCCInstallation.getVersion();
309 
310   // The primary search for libstdc++ supports multiarch variants.
311   addLibStdCXXIncludePaths(LibDir.str() + "/../include/c++/" + Version.Text,
312                            TripleStr, Multilib.includeSuffix(), DriverArgs,
313                            CC1Args);
314 }
315