/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/tools/clang/lib/Driver/ToolChains/WebAssembly.cpp
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1 | | //===--- WebAssembly.cpp - WebAssembly ToolChain Implementation -*- 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 "WebAssembly.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/Support/FileSystem.h" |
17 | | #include "llvm/Support/Path.h" |
18 | | #include "llvm/Option/ArgList.h" |
19 | | |
20 | | using namespace clang::driver; |
21 | | using namespace clang::driver::tools; |
22 | | using namespace clang::driver::toolchains; |
23 | | using namespace clang; |
24 | | using namespace llvm::opt; |
25 | | |
26 | | /// Following the conventions in https://wiki.debian.org/Multiarch/Tuples, |
27 | | /// we remove the vendor field to form the multiarch triple. |
28 | | static std::string getMultiarchTriple(const Driver &D, |
29 | | const llvm::Triple &TargetTriple, |
30 | 17 | StringRef SysRoot) { |
31 | 17 | return (TargetTriple.getArchName() + "-" + |
32 | 17 | TargetTriple.getOSAndEnvironmentName()).str(); |
33 | 17 | } |
34 | | |
35 | 19 | std::string wasm::Linker::getLinkerPath(const ArgList &Args) const { |
36 | 19 | const ToolChain &ToolChain = getToolChain(); |
37 | 19 | if (const Arg* A = Args.getLastArg(options::OPT_fuse_ld_EQ)) { |
38 | 1 | StringRef UseLinker = A->getValue(); |
39 | 1 | if (!UseLinker.empty()) { |
40 | 1 | if (llvm::sys::path::is_absolute(UseLinker) && |
41 | 1 | llvm::sys::fs::can_execute(UseLinker)0 ) |
42 | 0 | return UseLinker; |
43 | 1 | |
44 | 1 | // Accept 'lld', and 'ld' as aliases for the default linker |
45 | 1 | if (UseLinker != "lld" && UseLinker != "ld") |
46 | 1 | ToolChain.getDriver().Diag(diag::err_drv_invalid_linker_name) |
47 | 1 | << A->getAsString(Args); |
48 | 1 | } |
49 | 1 | } |
50 | 19 | |
51 | 19 | return ToolChain.GetProgramPath(ToolChain.getDefaultLinker()); |
52 | 19 | } |
53 | | |
54 | | void wasm::Linker::ConstructJob(Compilation &C, const JobAction &JA, |
55 | | const InputInfo &Output, |
56 | | const InputInfoList &Inputs, |
57 | | const ArgList &Args, |
58 | 19 | const char *LinkingOutput) const { |
59 | 19 | |
60 | 19 | const ToolChain &ToolChain = getToolChain(); |
61 | 19 | const char *Linker = Args.MakeArgString(getLinkerPath(Args)); |
62 | 19 | ArgStringList CmdArgs; |
63 | 19 | |
64 | 19 | if (Args.hasArg(options::OPT_s)) |
65 | 0 | CmdArgs.push_back("--strip-all"); |
66 | 19 | |
67 | 19 | Args.AddAllArgs(CmdArgs, options::OPT_L); |
68 | 19 | Args.AddAllArgs(CmdArgs, options::OPT_u); |
69 | 19 | ToolChain.AddFilePathLibArgs(Args, CmdArgs); |
70 | 19 | |
71 | 19 | if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) |
72 | 19 | CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt1.o"))); |
73 | 19 | |
74 | 19 | AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA); |
75 | 19 | |
76 | 19 | if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) { |
77 | 19 | if (ToolChain.ShouldLinkCXXStdlib(Args)) |
78 | 7 | ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs); |
79 | 19 | |
80 | 19 | if (Args.hasArg(options::OPT_pthread)) { |
81 | 4 | CmdArgs.push_back("-lpthread"); |
82 | 4 | CmdArgs.push_back("--shared-memory"); |
83 | 4 | } |
84 | 19 | |
85 | 19 | CmdArgs.push_back("-lc"); |
86 | 19 | AddRunTimeLibs(ToolChain, ToolChain.getDriver(), CmdArgs, Args); |
87 | 19 | } |
88 | 19 | |
89 | 19 | CmdArgs.push_back("-o"); |
90 | 19 | CmdArgs.push_back(Output.getFilename()); |
91 | 19 | |
92 | 19 | C.addCommand(llvm::make_unique<Command>(JA, *this, Linker, CmdArgs, Inputs)); |
93 | 19 | } |
94 | | |
95 | | WebAssembly::WebAssembly(const Driver &D, const llvm::Triple &Triple, |
96 | | const llvm::opt::ArgList &Args) |
97 | 53 | : ToolChain(D, Triple, Args) { |
98 | 53 | |
99 | 53 | assert(Triple.isArch32Bit() != Triple.isArch64Bit()); |
100 | 53 | |
101 | 53 | getProgramPaths().push_back(getDriver().getInstalledDir()); |
102 | 53 | |
103 | 53 | if (getTriple().getOS() == llvm::Triple::UnknownOS) { |
104 | 46 | // Theoretically an "unknown" OS should mean no standard libraries, however |
105 | 46 | // it could also mean that a custom set of libraries is in use, so just add |
106 | 46 | // /lib to the search path. Disable multiarch in this case, to discourage |
107 | 46 | // paths containing "unknown" from acquiring meanings. |
108 | 46 | getFilePaths().push_back(getDriver().SysRoot + "/lib"); |
109 | 46 | } else { |
110 | 7 | const std::string MultiarchTriple = |
111 | 7 | getMultiarchTriple(getDriver(), Triple, getDriver().SysRoot); |
112 | 7 | getFilePaths().push_back(getDriver().SysRoot + "/lib/" + MultiarchTriple); |
113 | 7 | } |
114 | 53 | } |
115 | | |
116 | 53 | bool WebAssembly::IsMathErrnoDefault() const { return false; } |
117 | | |
118 | 53 | bool WebAssembly::IsObjCNonFragileABIDefault() const { return true; } |
119 | | |
120 | 0 | bool WebAssembly::UseObjCMixedDispatch() const { return true; } |
121 | | |
122 | 53 | bool WebAssembly::isPICDefault() const { return false; } |
123 | | |
124 | 53 | bool WebAssembly::isPIEDefault() const { return false; } |
125 | | |
126 | 53 | bool WebAssembly::isPICDefaultForced() const { return false; } |
127 | | |
128 | 226 | bool WebAssembly::IsIntegratedAssemblerDefault() const { return true; } |
129 | | |
130 | 0 | bool WebAssembly::hasBlocksRuntime() const { return false; } |
131 | | |
132 | | // TODO: Support profiling. |
133 | 106 | bool WebAssembly::SupportsProfiling() const { return false; } |
134 | | |
135 | 19 | bool WebAssembly::HasNativeLLVMSupport() const { return true; } |
136 | | |
137 | | void WebAssembly::addClangTargetOptions(const ArgList &DriverArgs, |
138 | | ArgStringList &CC1Args, |
139 | 53 | Action::OffloadKind) const { |
140 | 53 | if (DriverArgs.hasFlag(clang::driver::options::OPT_fuse_init_array, |
141 | 53 | options::OPT_fno_use_init_array, true)) |
142 | 53 | CC1Args.push_back("-fuse-init-array"); |
143 | 53 | |
144 | 53 | // '-pthread' implies atomics, bulk-memory, and mutable-globals |
145 | 53 | if (DriverArgs.hasFlag(options::OPT_pthread, options::OPT_no_pthread, |
146 | 53 | false)) { |
147 | 8 | if (DriverArgs.hasFlag(options::OPT_mno_atomics, options::OPT_matomics, |
148 | 8 | false)) |
149 | 1 | getDriver().Diag(diag::err_drv_argument_not_allowed_with) |
150 | 1 | << "-pthread" |
151 | 1 | << "-mno-atomics"; |
152 | 8 | if (DriverArgs.hasFlag(options::OPT_mno_bulk_memory, |
153 | 8 | options::OPT_mbulk_memory, false)) |
154 | 1 | getDriver().Diag(diag::err_drv_argument_not_allowed_with) |
155 | 1 | << "-pthread" |
156 | 1 | << "-mno-bulk-memory"; |
157 | 8 | if (DriverArgs.hasFlag(options::OPT_mno_mutable_globals, |
158 | 8 | options::OPT_mmutable_globals, false)) |
159 | 1 | getDriver().Diag(diag::err_drv_argument_not_allowed_with) |
160 | 1 | << "-pthread" |
161 | 1 | << "-mno-mutable-globals"; |
162 | 8 | CC1Args.push_back("-target-feature"); |
163 | 8 | CC1Args.push_back("+atomics"); |
164 | 8 | CC1Args.push_back("-target-feature"); |
165 | 8 | CC1Args.push_back("+bulk-memory"); |
166 | 8 | CC1Args.push_back("-target-feature"); |
167 | 8 | CC1Args.push_back("+mutable-globals"); |
168 | 8 | } |
169 | 53 | } |
170 | | |
171 | 38 | ToolChain::RuntimeLibType WebAssembly::GetDefaultRuntimeLibType() const { |
172 | 38 | return ToolChain::RLT_CompilerRT; |
173 | 38 | } |
174 | | |
175 | | ToolChain::CXXStdlibType |
176 | 7 | WebAssembly::GetCXXStdlibType(const ArgList &Args) const { |
177 | 7 | if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) { |
178 | 5 | StringRef Value = A->getValue(); |
179 | 5 | if (Value != "libc++") |
180 | 5 | getDriver().Diag(diag::err_drv_invalid_stdlib_name) |
181 | 5 | << A->getAsString(Args); |
182 | 5 | } |
183 | 7 | return ToolChain::CST_Libcxx; |
184 | 7 | } |
185 | | |
186 | | void WebAssembly::AddClangSystemIncludeArgs(const ArgList &DriverArgs, |
187 | 53 | ArgStringList &CC1Args) const { |
188 | 53 | if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc)) |
189 | 0 | return; |
190 | 53 | |
191 | 53 | const Driver &D = getDriver(); |
192 | 53 | |
193 | 53 | if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) { |
194 | 53 | SmallString<128> P(D.ResourceDir); |
195 | 53 | llvm::sys::path::append(P, "include"); |
196 | 53 | addSystemInclude(DriverArgs, CC1Args, P); |
197 | 53 | } |
198 | 53 | |
199 | 53 | if (DriverArgs.hasArg(options::OPT_nostdlibinc)) |
200 | 0 | return; |
201 | 53 | |
202 | 53 | // Check for configure-time C include directories. |
203 | 53 | StringRef CIncludeDirs(C_INCLUDE_DIRS); |
204 | 53 | if (CIncludeDirs != "") { |
205 | 0 | SmallVector<StringRef, 5> dirs; |
206 | 0 | CIncludeDirs.split(dirs, ":"); |
207 | 0 | for (StringRef dir : dirs) { |
208 | 0 | StringRef Prefix = |
209 | 0 | llvm::sys::path::is_absolute(dir) ? StringRef(D.SysRoot) : ""; |
210 | 0 | addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir); |
211 | 0 | } |
212 | 0 | return; |
213 | 0 | } |
214 | 53 | |
215 | 53 | if (getTriple().getOS() != llvm::Triple::UnknownOS) { |
216 | 7 | const std::string MultiarchTriple = |
217 | 7 | getMultiarchTriple(D, getTriple(), D.SysRoot); |
218 | 7 | addSystemInclude(DriverArgs, CC1Args, D.SysRoot + "/include/" + MultiarchTriple); |
219 | 7 | } |
220 | 53 | addSystemInclude(DriverArgs, CC1Args, D.SysRoot + "/include"); |
221 | 53 | } |
222 | | |
223 | | void WebAssembly::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs, |
224 | 13 | ArgStringList &CC1Args) const { |
225 | 13 | if (!DriverArgs.hasArg(options::OPT_nostdlibinc) && |
226 | 13 | !DriverArgs.hasArg(options::OPT_nostdincxx)) { |
227 | 13 | if (getTriple().getOS() != llvm::Triple::UnknownOS) { |
228 | 3 | const std::string MultiarchTriple = |
229 | 3 | getMultiarchTriple(getDriver(), getTriple(), getDriver().SysRoot); |
230 | 3 | addSystemInclude(DriverArgs, CC1Args, |
231 | 3 | getDriver().SysRoot + "/include/" + MultiarchTriple + |
232 | 3 | "/c++/v1"); |
233 | 3 | } |
234 | 13 | addSystemInclude(DriverArgs, CC1Args, |
235 | 13 | getDriver().SysRoot + "/include/c++/v1"); |
236 | 13 | } |
237 | 13 | } |
238 | | |
239 | | void WebAssembly::AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args, |
240 | 7 | llvm::opt::ArgStringList &CmdArgs) const { |
241 | 7 | |
242 | 7 | switch (GetCXXStdlibType(Args)) { |
243 | 7 | case ToolChain::CST_Libcxx: |
244 | 7 | CmdArgs.push_back("-lc++"); |
245 | 7 | CmdArgs.push_back("-lc++abi"); |
246 | 7 | break; |
247 | 7 | case ToolChain::CST_Libstdcxx: |
248 | 0 | llvm_unreachable("invalid stdlib name"); |
249 | 7 | } |
250 | 7 | } |
251 | | |
252 | 53 | SanitizerMask WebAssembly::getSupportedSanitizers() const { |
253 | 53 | SanitizerMask Res = ToolChain::getSupportedSanitizers(); |
254 | 53 | if (getTriple().isOSEmscripten()) { |
255 | 1 | Res |= SanitizerKind::Vptr | SanitizerKind::Leak | SanitizerKind::Address; |
256 | 1 | } |
257 | 53 | return Res; |
258 | 53 | } |
259 | | |
260 | 19 | Tool *WebAssembly::buildLinker() const { |
261 | 19 | return new tools::wasm::Linker(*this); |
262 | 19 | } |