Coverage Report

Created: 2020-11-24 06:42

/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/lib/Driver/ToolChains/AIX.cpp
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//===--- AIX.cpp - AIX ToolChain Implementations ----------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "AIX.h"
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#include "Arch/PPC.h"
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#include "CommonArgs.h"
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#include "clang/Driver/Compilation.h"
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#include "clang/Driver/Options.h"
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#include "clang/Driver/SanitizerArgs.h"
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#include "llvm/Option/ArgList.h"
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#include "llvm/Support/Path.h"
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using AIX = clang::driver::toolchains::AIX;
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using namespace clang::driver;
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using namespace clang::driver::tools;
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using namespace clang::driver::toolchains;
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using namespace llvm::opt;
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using namespace llvm::sys;
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void aix::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
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                                  const InputInfo &Output,
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                                  const InputInfoList &Inputs,
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                                  const ArgList &Args,
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                                  const char *LinkingOutput) const {
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  ArgStringList CmdArgs;
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  const bool IsArch32Bit = getToolChain().getTriple().isArch32Bit();
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  const bool IsArch64Bit = getToolChain().getTriple().isArch64Bit();
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  // Only support 32 and 64 bit.
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  if (!IsArch32Bit && 
!IsArch64Bit27
)
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    llvm_unreachable("Unsupported bit width value.");
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  // Specify the mode in which the as(1) command operates.
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  if (IsArch32Bit) {
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    CmdArgs.push_back("-a32");
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  } else {
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    // Must be 64-bit, otherwise asserted already.
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    CmdArgs.push_back("-a64");
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  }
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  // Accept any mixture of instructions.
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  // On Power for AIX and Linux, this behaviour matches that of GCC for both the
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  // user-provided assembler source case and the compiler-produced assembler
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  // source case. Yet XL with user-provided assembler source would not add this.
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  CmdArgs.push_back("-many");
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  Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
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  // Specify assembler output file.
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  assert((Output.isFilename() || Output.isNothing()) && "Invalid output.");
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  if (Output.isFilename()) {
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    CmdArgs.push_back("-o");
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    CmdArgs.push_back(Output.getFilename());
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  }
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  // Specify assembler input file.
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  // The system assembler on AIX takes exactly one input file. The driver is
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  // expected to invoke as(1) separately for each assembler source input file.
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  if (Inputs.size() != 1)
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    llvm_unreachable("Invalid number of input files.");
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  const InputInfo &II = Inputs[0];
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  assert((II.isFilename() || II.isNothing()) && "Invalid input.");
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  if (II.isFilename())
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    CmdArgs.push_back(II.getFilename());
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  const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
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  C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(),
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                                         Exec, CmdArgs, Inputs, Output));
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}
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void aix::Linker::ConstructJob(Compilation &C, const JobAction &JA,
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                               const InputInfo &Output,
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                               const InputInfoList &Inputs, const ArgList &Args,
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                               const char *LinkingOutput) const {
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  const AIX &ToolChain = static_cast<const AIX &>(getToolChain());
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  const Driver &D = ToolChain.getDriver();
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  ArgStringList CmdArgs;
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  const bool IsArch32Bit = ToolChain.getTriple().isArch32Bit();
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  const bool IsArch64Bit = ToolChain.getTriple().isArch64Bit();
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  // Only support 32 and 64 bit.
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  if (!(IsArch32Bit || 
IsArch64Bit17
))
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    llvm_unreachable("Unsupported bit width value.");
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  // Force static linking when "-static" is present.
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  if (Args.hasArg(options::OPT_static))
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    CmdArgs.push_back("-bnso");
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  // Add options for shared libraries.
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  if (Args.hasArg(options::OPT_shared)) {
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    CmdArgs.push_back("-bM:SRE");
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    CmdArgs.push_back("-bnoentry");
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  }
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  // Specify linker output file.
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  assert((Output.isFilename() || Output.isNothing()) && "Invalid output.");
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  if (Output.isFilename()) {
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    CmdArgs.push_back("-o");
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    CmdArgs.push_back(Output.getFilename());
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  }
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  // Set linking mode (i.e., 32/64-bit) and the address of
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  // text and data sections based on arch bit width.
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  if (IsArch32Bit) {
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    CmdArgs.push_back("-b32");
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    CmdArgs.push_back("-bpT:0x10000000");
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    CmdArgs.push_back("-bpD:0x20000000");
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  } else {
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    // Must be 64-bit, otherwise asserted already.
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    CmdArgs.push_back("-b64");
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    CmdArgs.push_back("-bpT:0x100000000");
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    CmdArgs.push_back("-bpD:0x110000000");
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  }
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  auto getCrt0Basename = [&Args, IsArch32Bit] {
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    // Enable gprofiling when "-pg" is specified.
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    if (Args.hasArg(options::OPT_pg))
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      return IsArch32Bit ? 
"gcrt0.o"0
: "gcrt0_64.o";
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    // Enable profiling when "-p" is specified.
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    else if (Args.hasArg(options::OPT_p))
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      return IsArch32Bit ? "mcrt0.o" : 
"mcrt0_64.o"0
;
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    else
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      return IsArch32Bit ? 
"crt0.o"17
:
"crt0_64.o"14
;
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  };
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  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,
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                   options::OPT_shared)) {
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    CmdArgs.push_back(
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        Args.MakeArgString(ToolChain.GetFilePath(getCrt0Basename())));
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    CmdArgs.push_back(Args.MakeArgString(
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        ToolChain.GetFilePath(IsArch32Bit ? "crti.o" : 
"crti_64.o"15
)));
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  }
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  // Collect all static constructor and destructor functions in both C and CXX
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  // language link invocations. This has to come before AddLinkerInputs as the
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  // implied option needs to precede any other '-bcdtors' settings or
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  // '-bnocdtors' that '-Wl' might forward.
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  CmdArgs.push_back("-bcdtors:all:0:s");
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  // Specify linker input file(s).
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  AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
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  // Add directory to library search path.
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  Args.AddAllArgs(CmdArgs, options::OPT_L);
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  ToolChain.AddFilePathLibArgs(Args, CmdArgs);
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  ToolChain.addProfileRTLibs(Args, CmdArgs);
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  if (getToolChain().ShouldLinkCXXStdlib(Args))
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    getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
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  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
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    AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
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    // Support POSIX threads if "-pthreads" or "-pthread" is present.
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    if (Args.hasArg(options::OPT_pthreads, options::OPT_pthread))
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      CmdArgs.push_back("-lpthreads");
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    if (D.CCCIsCXX())
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      CmdArgs.push_back("-lm");
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    CmdArgs.push_back("-lc");
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  }
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  const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
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  C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(),
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                                         Exec, CmdArgs, Inputs, Output));
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}
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/// AIX - AIX tool chain which can call as(1) and ld(1) directly.
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AIX::AIX(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
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    : ToolChain(D, Triple, Args) {
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  getFilePaths().push_back(getDriver().SysRoot + "/usr/lib");
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}
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// Returns the effective header sysroot path to use.
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// This comes from either -isysroot or --sysroot.
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llvm::StringRef
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AIX::GetHeaderSysroot(const llvm::opt::ArgList &DriverArgs) const {
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  if (DriverArgs.hasArg(options::OPT_isysroot))
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    return DriverArgs.getLastArgValue(options::OPT_isysroot);
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  if (!getDriver().SysRoot.empty())
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    return getDriver().SysRoot;
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  return "/";
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}
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void AIX::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
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                                    ArgStringList &CC1Args) const {
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  // Return if -nostdinc is specified as a driver option.
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  if (DriverArgs.hasArg(options::OPT_nostdinc))
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    return;
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  llvm::StringRef Sysroot = GetHeaderSysroot(DriverArgs);
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  const Driver &D = getDriver();
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  // Add the Clang builtin headers (<resource>/include).
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  if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
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    SmallString<128> P(D.ResourceDir);
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    path::append(P, "/include");
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    addSystemInclude(DriverArgs, CC1Args, P.str());
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  }
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  // Return if -nostdlibinc is specified as a driver option.
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  if (DriverArgs.hasArg(options::OPT_nostdlibinc))
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    return;
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  // Add <sysroot>/usr/include.
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  SmallString<128> UP(Sysroot);
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  path::append(UP, "/usr/include");
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  addSystemInclude(DriverArgs, CC1Args, UP.str());
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}
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void AIX::AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
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                              llvm::opt::ArgStringList &CmdArgs) const {
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  switch (GetCXXStdlibType(Args)) {
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  case ToolChain::CST_Libcxx:
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    CmdArgs.push_back("-lc++");
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    return;
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  case ToolChain::CST_Libstdcxx:
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    llvm::report_fatal_error("linking libstdc++ unimplemented on AIX");
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  }
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  llvm_unreachable("Unexpected C++ library type; only libc++ is supported.");
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}
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ToolChain::CXXStdlibType AIX::GetDefaultCXXStdlibType() const {
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  return ToolChain::CST_Libcxx;
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}
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ToolChain::RuntimeLibType AIX::GetDefaultRuntimeLibType() const {
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  return ToolChain::RLT_CompilerRT;
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}
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auto AIX::buildAssembler() const -> Tool * { return new aix::Assembler(*this); }
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auto AIX::buildLinker() const -> Tool * { return new aix::Linker(*this); }