Clang Project

clang_source_code/lib/Driver/ToolChains/Solaris.cpp
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/Config/config.h"
12#include "clang/Driver/Compilation.h"
13#include "clang/Driver/Driver.h"
14#include "clang/Driver/DriverDiagnostic.h"
15#include "clang/Driver/Options.h"
16#include "llvm/Option/ArgList.h"
17#include "llvm/Support/FileSystem.h"
18#include "llvm/Support/Path.h"
19
20using namespace clang::driver;
21using namespace clang::driver::tools;
22using namespace clang::driver::toolchains;
23using namespace clang;
24using namespace llvm::opt;
25
26void solaris::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
27                                      const InputInfo &Output,
28                                      const InputInfoList &Inputs,
29                                      const ArgList &Args,
30                                      const char *LinkingOutput) const {
31  claimNoWarnArgs(Args);
32  ArgStringList CmdArgs;
33
34  Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
35
36  CmdArgs.push_back("-o");
37  CmdArgs.push_back(Output.getFilename());
38
39  for (const auto &II : Inputs)
40    CmdArgs.push_back(II.getFilename());
41
42  const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
43  C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
44}
45
46void solaris::Linker::ConstructJob(Compilation &C, const JobAction &JA,
47                                   const InputInfo &Output,
48                                   const InputInfoList &Inputs,
49                                   const ArgList &Args,
50                                   const char *LinkingOutput) const {
51  ArgStringList CmdArgs;
52
53  // Demangle C++ names in errors
54  CmdArgs.push_back("-C");
55
56  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_shared)) {
57    CmdArgs.push_back("-e");
58    CmdArgs.push_back("_start");
59  }
60
61  if (Args.hasArg(options::OPT_static)) {
62    CmdArgs.push_back("-Bstatic");
63    CmdArgs.push_back("-dn");
64  } else {
65    CmdArgs.push_back("-Bdynamic");
66    if (Args.hasArg(options::OPT_shared)) {
67      CmdArgs.push_back("-shared");
68    } else {
69      CmdArgs.push_back("--dynamic-linker");
70      CmdArgs.push_back(
71          Args.MakeArgString(getToolChain().GetFilePath("ld.so.1")));
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     (0) . __assert_fail ("Output.isNothing() && \"Invalid output.\"", "/home/seafit/code_projects/clang_source/clang/lib/Driver/ToolChains/Solaris.cpp", 84, __PRETTY_FUNCTION__))" file_link="../../../../include/assert.h.html#88" macro="true">assert(Output.isNothing() && "Invalid output.");
85  }
86
87  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
88    if (!Args.hasArg(options::OPT_shared))
89      CmdArgs.push_back(
90          Args.MakeArgString(getToolChain().GetFilePath("crt1.o")));
91
92    CmdArgs.push_back(Args.MakeArgString(getToolChain().GetFilePath("crti.o")));
93    CmdArgs.push_back(
94        Args.MakeArgString(getToolChain().GetFilePath("values-Xa.o")));
95    CmdArgs.push_back(
96        Args.MakeArgString(getToolChain().GetFilePath("crtbegin.o")));
97  }
98
99  // Provide __start___sancov_guards.  Solaris ld doesn't automatically create
100  // __start_SECNAME labels.
101  CmdArgs.push_back("--whole-archive");
102  CmdArgs.push_back(
103      getToolChain().getCompilerRTArgString(Args, "sancov_begin"));
104  CmdArgs.push_back("--no-whole-archive");
105
106  getToolChain().AddFilePathLibArgs(Args, CmdArgs);
107
108  Args.AddAllArgs(CmdArgs, {options::OPT_L, options::OPT_T_Group,
109                            options::OPT_e, options::OPT_r});
110
111  bool NeedsSanitizerDeps = addSanitizerRuntimes(getToolChain(), Args, CmdArgs);
112  AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
113
114  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
115    if (getToolChain().ShouldLinkCXXStdlib(Args))
116      getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
117    if (Args.hasArg(options::OPT_fstack_protector) ||
118        Args.hasArg(options::OPT_fstack_protector_strong) ||
119        Args.hasArg(options::OPT_fstack_protector_all)) {
120      // Explicitly link ssp libraries, not folded into Solaris libc.
121      CmdArgs.push_back("-lssp_nonshared");
122      CmdArgs.push_back("-lssp");
123    }
124    CmdArgs.push_back("-lgcc_s");
125    CmdArgs.push_back("-lc");
126    if (!Args.hasArg(options::OPT_shared)) {
127      CmdArgs.push_back("-lgcc");
128      CmdArgs.push_back("-lm");
129    }
130    if (NeedsSanitizerDeps)
131      linkSanitizerRuntimeDeps(getToolChain(), CmdArgs);
132  }
133
134  // Provide __stop___sancov_guards.  Solaris ld doesn't automatically create
135  // __stop_SECNAME labels.
136  CmdArgs.push_back("--whole-archive");
137  CmdArgs.push_back(
138      getToolChain().getCompilerRTArgString(Args, "sancov_end"));
139  CmdArgs.push_back("--no-whole-archive");
140
141  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
142    CmdArgs.push_back(
143        Args.MakeArgString(getToolChain().GetFilePath("crtend.o")));
144  }
145  CmdArgs.push_back(Args.MakeArgString(getToolChain().GetFilePath("crtn.o")));
146
147  getToolChain().addProfileRTLibs(Args, CmdArgs);
148
149  const char *Exec = Args.MakeArgString(getToolChain().GetLinkerPath());
150  C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
151}
152
153static StringRef getSolarisLibSuffix(const llvm::Triple &Triple) {
154  switch (Triple.getArch()) {
155  case llvm::Triple::x86:
156  case llvm::Triple::sparc:
157    break;
158  case llvm::Triple::x86_64:
159    return "/amd64";
160  case llvm::Triple::sparcv9:
161    return "/sparcv9";
162  default:
163    llvm_unreachable("Unsupported architecture");
164  }
165  return "";
166}
167
168/// Solaris - Solaris tool chain which can call as(1) and ld(1) directly.
169
170Solaris::Solaris(const Driver &D, const llvm::Triple &Triple,
171                 const ArgList &Args)
172    : Generic_ELF(D, Triple, Args) {
173
174  GCCInstallation.init(Triple, Args);
175
176  StringRef LibSuffix = getSolarisLibSuffix(Triple);
177  path_list &Paths = getFilePaths();
178  if (GCCInstallation.isValid()) {
179    // On Solaris gcc uses both an architecture-specific path with triple in it
180    // as well as a more generic lib path (+arch suffix).
181    addPathIfExists(D,
182                    GCCInstallation.getInstallPath() +
183                        GCCInstallation.getMultilib().gccSuffix(),
184                    Paths);
185    addPathIfExists(D, GCCInstallation.getParentLibPath() + LibSuffix, Paths);
186  }
187
188  // If we are currently running Clang inside of the requested system root,
189  // add its parent library path to those searched.
190  if (StringRef(D.Dir).startswith(D.SysRoot))
191    addPathIfExists(D, D.Dir + "/../lib", Paths);
192
193  addPathIfExists(D, D.SysRoot + "/usr/lib" + LibSuffix, Paths);
194}
195
196SanitizerMask Solaris::getSupportedSanitizers() const {
197  const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
198  SanitizerMask Res = ToolChain::getSupportedSanitizers();
199  // FIXME: Omit X86_64 until 64-bit support is figured out.
200  if (IsX86) {
201    Res |= SanitizerKind::Address;
202  }
203  Res |= SanitizerKind::Vptr;
204  return Res;
205}
206
207Tool *Solaris::buildAssembler() const {
208  return new tools::solaris::Assembler(*this);
209}
210
211Tool *Solaris::buildLinker() const { return new tools::solaris::Linker(*this); }
212
213void Solaris::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
214                                        ArgStringList &CC1Args) const {
215  const Driver &D = getDriver();
216
217  if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
218    return;
219
220  if (!DriverArgs.hasArg(options::OPT_nostdlibinc))
221    addSystemInclude(DriverArgs, CC1Args, D.SysRoot + "/usr/local/include");
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  // Add include directories specific to the selected multilib set and multilib.
246  if (GCCInstallation.isValid()) {
247    const MultilibSet::IncludeDirsFunc &Callback =
248        Multilibs.includeDirsCallback();
249    if (Callback) {
250      for (const auto &Path : Callback(GCCInstallation.getMultilib()))
251        addExternCSystemIncludeIfExists(
252            DriverArgs, CC1Args, GCCInstallation.getInstallPath() + Path);
253    }
254  }
255
256  addExternCSystemInclude(DriverArgs, CC1Args, D.SysRoot + "/usr/include");
257}
258
259void Solaris::addLibStdCxxIncludePaths(
260    const llvm::opt::ArgList &DriverArgs,
261    llvm::opt::ArgStringList &CC1Args) const {
262  // We need a detected GCC installation on Solaris (similar to Linux)
263  // to provide libstdc++'s headers.
264  if (!GCCInstallation.isValid())
265    return;
266
267  // By default, look for the C++ headers in an include directory adjacent to
268  // the lib directory of the GCC installation.
269  // On Solaris this usually looks like /usr/gcc/X.Y/include/c++/X.Y.Z
270  StringRef LibDir = GCCInstallation.getParentLibPath();
271  StringRef TripleStr = GCCInstallation.getTriple().str();
272  const Multilib &Multilib = GCCInstallation.getMultilib();
273  const GCCVersion &Version = GCCInstallation.getVersion();
274
275  // The primary search for libstdc++ supports multiarch variants.
276  addLibStdCXXIncludePaths(LibDir.str() + "/../include", "/c++/" + Version.Text,
277                           TripleStr,
278                           /*GCCMultiarchTriple*/ "",
279                           /*TargetMultiarchTriple*/ "",
280                           Multilib.includeSuffix(), DriverArgs, CC1Args);
281}
282
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