Solaris.cpp revision 360784 
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 "llvm/Option/ArgList.h"
18#include "llvm/Support/FileSystem.h"
19#include "llvm/Support/Path.h"
20
21using namespace clang::driver;
22using namespace clang::driver::tools;
23using namespace clang::driver::toolchains;
24using namespace clang;
25using namespace llvm::opt;
26
27void solaris::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
28                                      const InputInfo &Output,
29                                      const InputInfoList &Inputs,
30                                      const ArgList &Args,
31                                      const char *LinkingOutput) const {
32  claimNoWarnArgs(Args);
33  ArgStringList CmdArgs;
34
35  Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
36
37  CmdArgs.push_back("-o");
38  CmdArgs.push_back(Output.getFilename());
39
40  for (const auto &II : Inputs)
41    CmdArgs.push_back(II.getFilename());
42
43  const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
44  C.addCommand(std::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
45}
46
47void solaris::Linker::ConstructJob(Compilation &C, const JobAction &JA,
48                                   const InputInfo &Output,
49                                   const InputInfoList &Inputs,
50                                   const ArgList &Args,
51                                   const char *LinkingOutput) const {
52  ArgStringList CmdArgs;
53
54  // Demangle C++ names in errors
55  CmdArgs.push_back("-C");
56
57  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_shared)) {
58    CmdArgs.push_back("-e");
59    CmdArgs.push_back("_start");
60  }
61
62  if (Args.hasArg(options::OPT_static)) {
63    CmdArgs.push_back("-Bstatic");
64    CmdArgs.push_back("-dn");
65  } else {
66    CmdArgs.push_back("-Bdynamic");
67    if (Args.hasArg(options::OPT_shared)) {
68      CmdArgs.push_back("-shared");
69    }
70
71    // libpthread has been folded into libc since Solaris 10, no need to do
72    // anything for pthreads. Claim argument to avoid warning.
73    Args.ClaimAllArgs(options::OPT_pthread);
74    Args.ClaimAllArgs(options::OPT_pthreads);
75  }
76
77  if (Output.isFilename()) {
78    CmdArgs.push_back("-o");
79    CmdArgs.push_back(Output.getFilename());
80  } else {
81    assert(Output.isNothing() && "Invalid output.");
82  }
83
84  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
85    if (!Args.hasArg(options::OPT_shared))
86      CmdArgs.push_back(
87          Args.MakeArgString(getToolChain().GetFilePath("crt1.o")));
88
89    CmdArgs.push_back(Args.MakeArgString(getToolChain().GetFilePath("crti.o")));
90
91    const Arg *Std = Args.getLastArg(options::OPT_std_EQ, options::OPT_ansi);
92    bool HaveAnsi = false;
93    const LangStandard *LangStd = nullptr;
94    if (Std) {
95      HaveAnsi = Std->getOption().matches(options::OPT_ansi);
96      if (!HaveAnsi)
97        LangStd = LangStandard::getLangStandardForName(Std->getValue());
98    }
99
100    const char *values_X = "values-Xa.o";
101    // Use values-Xc.o for -ansi, -std=c*, -std=iso9899:199409.
102    if (HaveAnsi || (LangStd && !LangStd->isGNUMode()))
103      values_X = "values-Xc.o";
104    CmdArgs.push_back(Args.MakeArgString(getToolChain().GetFilePath(values_X)));
105
106    const char *values_xpg = "values-xpg6.o";
107    // Use values-xpg4.o for -std=c90, -std=gnu90, -std=iso9899:199409.
108    if (LangStd && LangStd->getLanguage() == Language::C && !LangStd->isC99())
109      values_xpg = "values-xpg4.o";
110    CmdArgs.push_back(
111        Args.MakeArgString(getToolChain().GetFilePath(values_xpg)));
112    CmdArgs.push_back(
113        Args.MakeArgString(getToolChain().GetFilePath("crtbegin.o")));
114  }
115
116  getToolChain().AddFilePathLibArgs(Args, CmdArgs);
117
118  Args.AddAllArgs(CmdArgs, {options::OPT_L, options::OPT_T_Group,
119                            options::OPT_e, options::OPT_r});
120
121  bool NeedsSanitizerDeps = addSanitizerRuntimes(getToolChain(), Args, CmdArgs);
122  AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
123
124  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
125    if (getToolChain().ShouldLinkCXXStdlib(Args))
126      getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
127    if (Args.hasArg(options::OPT_fstack_protector) ||
128        Args.hasArg(options::OPT_fstack_protector_strong) ||
129        Args.hasArg(options::OPT_fstack_protector_all)) {
130      // Explicitly link ssp libraries, not folded into Solaris libc.
131      CmdArgs.push_back("-lssp_nonshared");
132      CmdArgs.push_back("-lssp");
133    }
134    CmdArgs.push_back("-lgcc_s");
135    CmdArgs.push_back("-lc");
136    if (!Args.hasArg(options::OPT_shared)) {
137      CmdArgs.push_back("-lgcc");
138      CmdArgs.push_back("-lm");
139    }
140    if (NeedsSanitizerDeps)
141      linkSanitizerRuntimeDeps(getToolChain(), CmdArgs);
142  }
143
144  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
145    CmdArgs.push_back(
146        Args.MakeArgString(getToolChain().GetFilePath("crtend.o")));
147  }
148  CmdArgs.push_back(Args.MakeArgString(getToolChain().GetFilePath("crtn.o")));
149
150  getToolChain().addProfileRTLibs(Args, CmdArgs);
151
152  const char *Exec = Args.MakeArgString(getToolChain().GetLinkerPath());
153  C.addCommand(std::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
154}
155
156static StringRef getSolarisLibSuffix(const llvm::Triple &Triple) {
157  switch (Triple.getArch()) {
158  case llvm::Triple::x86:
159  case llvm::Triple::sparc:
160    break;
161  case llvm::Triple::x86_64:
162    return "/amd64";
163  case llvm::Triple::sparcv9:
164    return "/sparcv9";
165  default:
166    llvm_unreachable("Unsupported architecture");
167  }
168  return "";
169}
170
171/// Solaris - Solaris tool chain which can call as(1) and ld(1) directly.
172
173Solaris::Solaris(const Driver &D, const llvm::Triple &Triple,
174                 const ArgList &Args)
175    : Generic_ELF(D, Triple, Args) {
176
177  GCCInstallation.init(Triple, Args);
178
179  StringRef LibSuffix = getSolarisLibSuffix(Triple);
180  path_list &Paths = getFilePaths();
181  if (GCCInstallation.isValid()) {
182    // On Solaris gcc uses both an architecture-specific path with triple in it
183    // as well as a more generic lib path (+arch suffix).
184    addPathIfExists(D,
185                    GCCInstallation.getInstallPath() +
186                        GCCInstallation.getMultilib().gccSuffix(),
187                    Paths);
188    addPathIfExists(D, GCCInstallation.getParentLibPath() + LibSuffix, Paths);
189  }
190
191  // If we are currently running Clang inside of the requested system root,
192  // add its parent library path to those searched.
193  if (StringRef(D.Dir).startswith(D.SysRoot))
194    addPathIfExists(D, D.Dir + "/../lib", Paths);
195
196  addPathIfExists(D, D.SysRoot + "/usr/lib" + LibSuffix, Paths);
197}
198
199SanitizerMask Solaris::getSupportedSanitizers() const {
200  const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
201  const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
202  SanitizerMask Res = ToolChain::getSupportedSanitizers();
203  // FIXME: Omit X86_64 until 64-bit support is figured out.
204  if (IsX86) {
205    Res |= SanitizerKind::Address;
206    Res |= SanitizerKind::PointerCompare;
207    Res |= SanitizerKind::PointerSubtract;
208  }
209  if (IsX86 || IsX86_64)
210    Res |= SanitizerKind::Function;
211  Res |= SanitizerKind::Vptr;
212  return Res;
213}
214
215Tool *Solaris::buildAssembler() const {
216  return new tools::solaris::Assembler(*this);
217}
218
219Tool *Solaris::buildLinker() const { return new tools::solaris::Linker(*this); }
220
221void Solaris::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
222                                        ArgStringList &CC1Args) const {
223  const Driver &D = getDriver();
224
225  if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
226    return;
227
228  if (!DriverArgs.hasArg(options::OPT_nostdlibinc))
229    addSystemInclude(DriverArgs, CC1Args, D.SysRoot + "/usr/local/include");
230
231  if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
232    SmallString<128> P(D.ResourceDir);
233    llvm::sys::path::append(P, "include");
234    addSystemInclude(DriverArgs, CC1Args, P);
235  }
236
237  if (DriverArgs.hasArg(options::OPT_nostdlibinc))
238    return;
239
240  // Check for configure-time C include directories.
241  StringRef CIncludeDirs(C_INCLUDE_DIRS);
242  if (CIncludeDirs != "") {
243    SmallVector<StringRef, 5> dirs;
244    CIncludeDirs.split(dirs, ":");
245    for (StringRef dir : dirs) {
246      StringRef Prefix =
247          llvm::sys::path::is_absolute(dir) ? StringRef(D.SysRoot) : "";
248      addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
249    }
250    return;
251  }
252
253  // Add include directories specific to the selected multilib set and multilib.
254  if (GCCInstallation.isValid()) {
255    const MultilibSet::IncludeDirsFunc &Callback =
256        Multilibs.includeDirsCallback();
257    if (Callback) {
258      for (const auto &Path : Callback(GCCInstallation.getMultilib()))
259        addExternCSystemIncludeIfExists(
260            DriverArgs, CC1Args, GCCInstallation.getInstallPath() + Path);
261    }
262  }
263
264  addExternCSystemInclude(DriverArgs, CC1Args, D.SysRoot + "/usr/include");
265}
266
267void Solaris::addLibStdCxxIncludePaths(
268    const llvm::opt::ArgList &DriverArgs,
269    llvm::opt::ArgStringList &CC1Args) const {
270  // We need a detected GCC installation on Solaris (similar to Linux)
271  // to provide libstdc++'s headers.
272  if (!GCCInstallation.isValid())
273    return;
274
275  // By default, look for the C++ headers in an include directory adjacent to
276  // the lib directory of the GCC installation.
277  // On Solaris this usually looks like /usr/gcc/X.Y/include/c++/X.Y.Z
278  StringRef LibDir = GCCInstallation.getParentLibPath();
279  StringRef TripleStr = GCCInstallation.getTriple().str();
280  const Multilib &Multilib = GCCInstallation.getMultilib();
281  const GCCVersion &Version = GCCInstallation.getVersion();
282
283  // The primary search for libstdc++ supports multiarch variants.
284  addLibStdCXXIncludePaths(LibDir.str() + "/../include", "/c++/" + Version.Text,
285                           TripleStr,
286                           /*GCCMultiarchTriple*/ "",
287                           /*TargetMultiarchTriple*/ "",
288                           Multilib.includeSuffix(), DriverArgs, CC1Args);
289}
290