clang 10.0.0git

CloudABI.cpp
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1 //===--- CloudABI.cpp - CloudABI 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 "CloudABI.h"
10 #include "InputInfo.h"
11 #include "CommonArgs.h"
12 #include "clang/Driver/Compilation.h"
13 #include "clang/Driver/Driver.h"
14 #include "clang/Driver/Options.h"
15 #include "llvm/ADT/SmallString.h"
16 #include "llvm/Option/ArgList.h"
17 #include "llvm/Support/Path.h"
18
19 using namespace clang::driver;
20 using namespace clang::driver::tools;
21 using namespace clang::driver::toolchains;
22 using namespace clang;
23 using namespace llvm::opt;
24
25 void cloudabi::Linker::ConstructJob(Compilation &C, const JobAction &JA,
26 const InputInfo &Output,
27 const InputInfoList &Inputs,
28 const ArgList &Args,
29 const char *LinkingOutput) const {
30 const ToolChain &ToolChain = getToolChain();
31 const Driver &D = ToolChain.getDriver();
32 ArgStringList CmdArgs;
33
34 // Silence warning for "clang -g foo.o -o foo"
35 Args.ClaimAllArgs(options::OPT_g_Group);
36 // and "clang -emit-llvm foo.o -o foo"
37 Args.ClaimAllArgs(options::OPT_emit_llvm);
38 // and for "clang -w foo.o -o foo". Other warning options are already
39 // handled somewhere else.
40 Args.ClaimAllArgs(options::OPT_w);
41
42 if (!D.SysRoot.empty())
43 CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
44
45 // CloudABI only supports static linkage.
46 CmdArgs.push_back("-Bstatic");
47 CmdArgs.push_back("--no-dynamic-linker");
48
49 // Provide PIE linker flags in case PIE is default for the architecture.
50 if (ToolChain.isPIEDefault()) {
51 CmdArgs.push_back("-pie");
52 CmdArgs.push_back("-zrelro");
53 }
54
55 CmdArgs.push_back("--eh-frame-hdr");
56 CmdArgs.push_back("--gc-sections");
57
58 if (Output.isFilename()) {
59 CmdArgs.push_back("-o");
60 CmdArgs.push_back(Output.getFilename());
61 } else {
62 assert(Output.isNothing() && "Invalid output.");
63 }
64
65 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
66 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
67 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtbegin.o")));
68 }
69
70 Args.AddAllArgs(CmdArgs, options::OPT_L);
71 ToolChain.AddFilePathLibArgs(Args, CmdArgs);
72 Args.AddAllArgs(CmdArgs,
73 {options::OPT_T_Group, options::OPT_e, options::OPT_s,
74 options::OPT_t, options::OPT_Z_Flag, options::OPT_r});
75
76 if (D.isUsingLTO()) {
77 assert(!Inputs.empty() && "Must have at least one input.");
78 AddGoldPlugin(ToolChain, Args, CmdArgs, Output, Inputs[0],
79 D.getLTOMode() == LTOK_Thin);
80 }
81
82 AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
83
84 if (ToolChain.ShouldLinkCXXStdlib(Args))
85 ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
86 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
87 CmdArgs.push_back("-lc");
88 CmdArgs.push_back("-lcompiler_rt");
89 }
90
91 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles))
92 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtend.o")));
93
94 const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
95 C.addCommand(std::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
96 }
97
98 // CloudABI - CloudABI tool chain which can call ld(1) directly.
99
100 CloudABI::CloudABI(const Driver &D, const llvm::Triple &Triple,
101 const ArgList &Args)
102 : Generic_ELF(D, Triple, Args) {
103 SmallString<128> P(getDriver().Dir);
104 llvm::sys::path::append(P, "..", getTriple().str(), "lib");
105 getFilePaths().push_back(P.str());
106 }
107
108 void CloudABI::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
109 llvm::opt::ArgStringList &CC1Args) const {
110 SmallString<128> P(getDriver().Dir);
111 llvm::sys::path::append(P, "..", getTriple().str(), "include/c++/v1");
112 addSystemInclude(DriverArgs, CC1Args, P.str());
113 }
114
115 void CloudABI::AddCXXStdlibLibArgs(const ArgList &Args,
116 ArgStringList &CmdArgs) const {
117 CmdArgs.push_back("-lc++");
118 CmdArgs.push_back("-lc++abi");
119 CmdArgs.push_back("-lunwind");
120 }
121
122 Tool *CloudABI::buildLinker() const {
123 return new tools::cloudabi::Linker(*this);
124 }
125
126 bool CloudABI::isPIEDefault() const {
127 // Only enable PIE on architectures that support PC-relative
128 // addressing. PC-relative addressing is required, as the process
129 // startup code must be able to relocate itself.
130 switch (getTriple().getArch()) {
131 case llvm::Triple::aarch64:
132 case llvm::Triple::x86_64:
133 return true;
134 default:
135 return false;
136 }
137 }
138
139 SanitizerMask CloudABI::getSupportedSanitizers() const {
140 SanitizerMask Res = ToolChain::getSupportedSanitizers();
141 Res |= SanitizerKind::SafeStack;
142 return Res;
143 }
144
145 SanitizerMask CloudABI::getDefaultSanitizers() const {
146 return SanitizerKind::SafeStack;
147 }
CloudABI.h
clang::driver::toolchains::CloudABI::getDefaultSanitizers
SanitizerMask getDefaultSanitizers() const override
Return sanitizers which are enabled by default.
Definition: CloudABI.cpp:145
P
StringRef P
Definition: ASTMatchersInternal.cpp:485
clang::driver::Driver::isUsingLTO
bool isUsingLTO() const
Returns true if we are performing any kind of LTO.
Definition: Driver.h:554
clang::driver::Driver::getLTOMode
LTOKind getLTOMode() const
Get the specific kind of LTO being performed.
Definition: Driver.h:557
clang::driver::ToolChain::GetLinkerPath
std::string GetLinkerPath() const
Returns the linker path, respecting the -fuse-ld= argument to determine the linker suffix or name...
Definition: ToolChain.cpp:520
clang::driver::InputInfo::getFilename
const char * getFilename() const
Definition: InputInfo.h:83
CommonArgs.h
clang::driver::JobAction
Definition: Action.h:375
clang::driver::toolchains::CloudABI::AddCXXStdlibLibArgs
void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const override
AddCXXStdlibLibArgs - Add the system specific linker arguments to use for the given C++ standard libr...
Definition: CloudABI.cpp:115
clang::driver::tools::AddGoldPlugin
void AddGoldPlugin(const ToolChain &ToolChain, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs, const InputInfo &Output, const InputInfo &Input, bool IsThinLTO)
clang::driver::tools
Definition: AIX.h:17
clang::driver::InputInfo
InputInfo - Wrapper for information about an input source.
Definition: InputInfo.h:22
clang::driver::ToolChain::GetFilePath
std::string GetFilePath(const char *Name) const
Definition: ToolChain.cpp:512
clang::driver::ToolChain::getFilePaths
path_list & getFilePaths()
Definition: ToolChain.h:237
clang::driver::Driver
Driver - Encapsulate logic for constructing compilation processes from a set of gcc-driver-like comma...
Definition: Driver.h:59
clang::driver::tools::cloudabi::Linker
Definition: CloudABI.h:22
llvm::SmallString< 128 >
Driver.h
clang::driver::toolchains::CloudABI::getSupportedSanitizers
SanitizerMask getSupportedSanitizers() const override
Return sanitizers which are available in this toolchain.
Definition: CloudABI.cpp:139
Compilation.h
clang::driver::toolchains::Generic_ELF
Definition: Gnu.h:348
llvm::opt
Definition: Action.h:23
clang::driver::Compilation::addCommand
void addCommand(std::unique_ptr< Command > C)
Definition: Compilation.h:205
clang::driver::toolchains::CloudABI::isPIEDefault
bool isPIEDefault() const override
Test whether this toolchain defaults to PIE.
Definition: CloudABI.cpp:126
clang::driver::tools::cloudabi::Linker::ConstructJob
void ConstructJob(Compilation &C, const JobAction &JA, const InputInfo &Output, const InputInfoList &Inputs, const llvm::opt::ArgList &TCArgs, const char *LinkingOutput) const override
ConstructJob - Construct jobs to perform the action JA, writing to Output and with Inputs...
Definition: CloudABI.cpp:25
clang::driver::ToolChain::getArch
llvm::Triple::ArchType getArch() const
Definition: ToolChain.h:215
clang::driver::ToolChain::AddFilePathLibArgs
void AddFilePathLibArgs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const
AddFilePathLibArgs - Add each thing in getFilePaths() as a "-L" option.
Definition: ToolChain.cpp:906
clang::driver::toolchains::CloudABI::buildLinker
Tool * buildLinker() const override
Definition: CloudABI.cpp:122
clang::driver::ToolChain::getDriver
const Driver & getDriver() const
Definition: ToolChain.h:199
clang::SanitizerMask
Definition: Sanitizers.h:29
llvm::SmallVector
Definition: LLVM.h:35
clang::driver::ToolChain::addSystemInclude
static void addSystemInclude(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, const Twine &Path)
Utility function to add a system include directory to CC1 arguments.
Definition: ToolChain.cpp:820
Options.h
clang::driver::ToolChain::ShouldLinkCXXStdlib
bool ShouldLinkCXXStdlib(const llvm::opt::ArgList &Args) const
Returns if the C++ standard library should be linked in.
Definition: ToolChain.cpp:883
clang
Dataflow Directional Tag Classes.
Definition: CFGReachabilityAnalysis.h:21
clang::driver::LTOK_Thin
Definition: Driver.h:53
clang::driver::tools::AddLinkerInputs
void AddLinkerInputs(const ToolChain &TC, const InputInfoList &Inputs, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs, const JobAction &JA)
clang::driver::Driver::SysRoot
std::string SysRoot
sysroot, if present
Definition: Driver.h:148
clang::driver::Tool
Tool - Information on a specific compilation tool.
Definition: Tool.h:33
InputInfo.h
clang::driver::ToolChain::isPIEDefault
virtual bool isPIEDefault() const =0
Test whether this toolchain defaults to PIE.
clang::driver::Compilation
Compilation - A set of tasks to perform for a single driver invocation.
Definition: Compilation.h:45
clang::driver::ToolChain::getTriple
const llvm::Triple & getTriple() const
Definition: ToolChain.h:201
clang::driver
Definition: Action.h:31
clang::driver::ToolChain::getSupportedSanitizers
virtual SanitizerMask getSupportedSanitizers() const
Return sanitizers which are available in this toolchain.
Definition: ToolChain.cpp:942
clang::driver::toolchains
Definition: AIX.h:55
clang::driver::InputInfo::isNothing
bool isNothing() const
Definition: InputInfo.h:74
clang::driver::InputInfo::isFilename
bool isFilename() const
Definition: InputInfo.h:75
clang::driver::toolchains::CloudABI::addLibCxxIncludePaths
void addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args) const override
Definition: CloudABI.cpp:108
clang::driver::ToolChain::AddCXXStdlibLibArgs
virtual void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const
AddCXXStdlibLibArgs - Add the system specific linker arguments to use for the given C++ standard libr...
Definition: ToolChain.cpp:889
clang::driver::ToolChain
ToolChain - Access to tools for a single platform.
Definition: ToolChain.h:88