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-rw-r--r--lib/Driver/ToolChains/WebAssembly.cpp116
1 files changed, 92 insertions, 24 deletions
diff --git a/lib/Driver/ToolChains/WebAssembly.cpp b/lib/Driver/ToolChains/WebAssembly.cpp
index 6310d5fabaec..7a40c13c065a 100644
--- a/lib/Driver/ToolChains/WebAssembly.cpp
+++ b/lib/Driver/ToolChains/WebAssembly.cpp
@@ -1,18 +1,20 @@
//===--- WebAssembly.cpp - WebAssembly ToolChain Implementation -*- C++ -*-===//
//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "WebAssembly.h"
#include "CommonArgs.h"
+#include "clang/Config/config.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/Options.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Path.h"
#include "llvm/Option/ArgList.h"
using namespace clang::driver;
@@ -21,9 +23,6 @@ using namespace clang::driver::toolchains;
using namespace clang;
using namespace llvm::opt;
-wasm::Linker::Linker(const ToolChain &TC)
- : GnuTool("wasm::Linker", "lld", TC) {}
-
/// Following the conventions in https://wiki.debian.org/Multiarch/Tuples,
/// we remove the vendor field to form the multiarch triple.
static std::string getMultiarchTriple(const Driver &D,
@@ -33,9 +32,24 @@ static std::string getMultiarchTriple(const Driver &D,
TargetTriple.getOSAndEnvironmentName()).str();
}
-bool wasm::Linker::isLinkJob() const { return true; }
+std::string wasm::Linker::getLinkerPath(const ArgList &Args) const {
+ const ToolChain &ToolChain = getToolChain();
+ if (const Arg* A = Args.getLastArg(options::OPT_fuse_ld_EQ)) {
+ StringRef UseLinker = A->getValue();
+ if (!UseLinker.empty()) {
+ if (llvm::sys::path::is_absolute(UseLinker) &&
+ llvm::sys::fs::can_execute(UseLinker))
+ return UseLinker;
+
+ // Accept 'lld', and 'ld' as aliases for the default linker
+ if (UseLinker != "lld" && UseLinker != "ld")
+ ToolChain.getDriver().Diag(diag::err_drv_invalid_linker_name)
+ << A->getAsString(Args);
+ }
+ }
-bool wasm::Linker::hasIntegratedCPP() const { return false; }
+ return ToolChain.GetProgramPath(ToolChain.getDefaultLinker());
+}
void wasm::Linker::ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output,
@@ -44,7 +58,7 @@ void wasm::Linker::ConstructJob(Compilation &C, const JobAction &JA,
const char *LinkingOutput) const {
const ToolChain &ToolChain = getToolChain();
- const char *Linker = Args.MakeArgString(ToolChain.GetLinkerPath());
+ const char *Linker = Args.MakeArgString(getLinkerPath(Args));
ArgStringList CmdArgs;
if (Args.hasArg(options::OPT_s))
@@ -63,8 +77,10 @@ void wasm::Linker::ConstructJob(Compilation &C, const JobAction &JA,
if (ToolChain.ShouldLinkCXXStdlib(Args))
ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
- if (Args.hasArg(options::OPT_pthread))
+ if (Args.hasArg(options::OPT_pthread)) {
CmdArgs.push_back("-lpthread");
+ CmdArgs.push_back("--shared-memory");
+ }
CmdArgs.push_back("-lc");
AddRunTimeLibs(ToolChain, ToolChain.getDriver(), CmdArgs, Args);
@@ -124,6 +140,32 @@ void WebAssembly::addClangTargetOptions(const ArgList &DriverArgs,
if (DriverArgs.hasFlag(clang::driver::options::OPT_fuse_init_array,
options::OPT_fno_use_init_array, true))
CC1Args.push_back("-fuse-init-array");
+
+ // '-pthread' implies atomics, bulk-memory, and mutable-globals
+ if (DriverArgs.hasFlag(options::OPT_pthread, options::OPT_no_pthread,
+ false)) {
+ if (DriverArgs.hasFlag(options::OPT_mno_atomics, options::OPT_matomics,
+ false))
+ getDriver().Diag(diag::err_drv_argument_not_allowed_with)
+ << "-pthread"
+ << "-mno-atomics";
+ if (DriverArgs.hasFlag(options::OPT_mno_bulk_memory,
+ options::OPT_mbulk_memory, false))
+ getDriver().Diag(diag::err_drv_argument_not_allowed_with)
+ << "-pthread"
+ << "-mno-bulk-memory";
+ if (DriverArgs.hasFlag(options::OPT_mno_mutable_globals,
+ options::OPT_mmutable_globals, false))
+ getDriver().Diag(diag::err_drv_argument_not_allowed_with)
+ << "-pthread"
+ << "-mno-mutable-globals";
+ CC1Args.push_back("-target-feature");
+ CC1Args.push_back("+atomics");
+ CC1Args.push_back("-target-feature");
+ CC1Args.push_back("+bulk-memory");
+ CC1Args.push_back("-target-feature");
+ CC1Args.push_back("+mutable-globals");
+ }
}
ToolChain::RuntimeLibType WebAssembly::GetDefaultRuntimeLibType() const {
@@ -143,14 +185,39 @@ WebAssembly::GetCXXStdlibType(const ArgList &Args) const {
void WebAssembly::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
ArgStringList &CC1Args) const {
- if (!DriverArgs.hasArg(options::OPT_nostdinc)) {
- if (getTriple().getOS() != llvm::Triple::UnknownOS) {
- const std::string MultiarchTriple =
- getMultiarchTriple(getDriver(), getTriple(), getDriver().SysRoot);
- addSystemInclude(DriverArgs, CC1Args, getDriver().SysRoot + "/include/" + MultiarchTriple);
+ if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
+ return;
+
+ const Driver &D = getDriver();
+
+ if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
+ SmallString<128> P(D.ResourceDir);
+ llvm::sys::path::append(P, "include");
+ addSystemInclude(DriverArgs, CC1Args, P);
+ }
+
+ if (DriverArgs.hasArg(options::OPT_nostdlibinc))
+ return;
+
+ // Check for configure-time C include directories.
+ StringRef CIncludeDirs(C_INCLUDE_DIRS);
+ if (CIncludeDirs != "") {
+ SmallVector<StringRef, 5> dirs;
+ CIncludeDirs.split(dirs, ":");
+ for (StringRef dir : dirs) {
+ StringRef Prefix =
+ llvm::sys::path::is_absolute(dir) ? StringRef(D.SysRoot) : "";
+ addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
}
- addSystemInclude(DriverArgs, CC1Args, getDriver().SysRoot + "/include");
+ return;
}
+
+ if (getTriple().getOS() != llvm::Triple::UnknownOS) {
+ const std::string MultiarchTriple =
+ getMultiarchTriple(D, getTriple(), D.SysRoot);
+ addSystemInclude(DriverArgs, CC1Args, D.SysRoot + "/include/" + MultiarchTriple);
+ }
+ addSystemInclude(DriverArgs, CC1Args, D.SysRoot + "/include");
}
void WebAssembly::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
@@ -161,7 +228,8 @@ void WebAssembly::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
const std::string MultiarchTriple =
getMultiarchTriple(getDriver(), getTriple(), getDriver().SysRoot);
addSystemInclude(DriverArgs, CC1Args,
- getDriver().SysRoot + "/include/" + MultiarchTriple + "/c++/v1");
+ getDriver().SysRoot + "/include/" + MultiarchTriple +
+ "/c++/v1");
}
addSystemInclude(DriverArgs, CC1Args,
getDriver().SysRoot + "/include/c++/v1");
@@ -181,12 +249,12 @@ void WebAssembly::AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
}
}
-std::string WebAssembly::getThreadModel() const {
- // The WebAssembly MVP does not yet support threads; for now, use the
- // "single" threading model, which lowers atomics to non-atomic operations.
- // When threading support is standardized and implemented in popular engines,
- // this override should be removed.
- return "single";
+SanitizerMask WebAssembly::getSupportedSanitizers() const {
+ SanitizerMask Res = ToolChain::getSupportedSanitizers();
+ if (getTriple().isOSEmscripten()) {
+ Res |= SanitizerKind::Vptr | SanitizerKind::Leak | SanitizerKind::Address;
+ }
+ return Res;
}
Tool *WebAssembly::buildLinker() const {
generated by cgit v1.2.3 (git 2.25.1) at 2025-08-06 13:29:30 +0000