CloudABI.cpp source code [clang_source_code/lib/Driver/ToolChains/CloudABI.cpp]

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	(0) . __assert_fail ("Output.isNothing() && \"Invalid output.\"", "/home/seafit/code_projects/clang_source/clang/lib/Driver/ToolChains/CloudABI.cpp", 62, __PRETTY_FUNCTION__))" file_link="../../../../include/assert.h.html#88" macro="true">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	(0) . __assert_fail ("!Inputs.empty() && \"Must have at least one input.\"", "/home/seafit/code_projects/clang_source/clang/lib/Driver/ToolChains/CloudABI.cpp", 77, __PRETTY_FUNCTION__))" file_link="../../../../include/assert.h.html#88" macro="true">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(llvm::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	}
148

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