Question

我正在尝试使用LibTooling替换C代码文件中的函数和变量名。因此，我下载了llvm并按照说明使用GMake和Visual Studio 2015在Windows中进行设置。

我想遵循许多教程（例如this one），但他们都假设您正在使用Linux / Make，因此他们提供了一个Makefile，它以某种方式管理集成到llvm源代码中

我想要做的是在Visual Studio中使用这些示例，但我真的不知道从哪里开始 - 我可以在给定的（llvn.sln）解决方案中创建一个新项目并在那里添加代码吗？如何告诉Visual Studio包含clang源（在我提到的那些Makefile中定义）？

Answer 1

最好使用Cmake生成visual studio项目文件，然后使用visual studio构建。本教程将向您展示如何完成： https://llvm.org/docs/CMake.html

您需要的部分是段落https://llvm.org/docs/CMake.html#usage

Answer 2

环境：Windows 10 X64，VS2017，CMake 3.9.3 参考文献： https://clang.llvm.org/get_started.html

创建一个工作目录，例如D：\ software \ LLVM

下载LLVM和Clang源代码（版本6.0.0）：

http://releases.llvm.org/6.0.0/llvm-6.0.0.src.tar.xz http://releases.llvm.org/6.0.0/cfe-6.0.0.src.tar.xz

将其提取到工作目录中，并将其重命名为llvm和clang（删除版本代码）：

D:\software\LLVM\llvm

D:\software\LLVM\clang

如果将版本代码保留在文件夹名称中，则稍后CMake会说找不到文件夹“ clang”

D:\software\LLVM\build-x86

和x64（仅在需要x64构建的情况下）：

D:\software\LLVM\build-x64

进入构建输出目录：

cd D:\software\LLVM\build-x86

运行cmake，用于x86构建：

cmake -DLLVM_ENABLE_PROJECTS=clang -G "Visual Studio 15 2017" -A Win32 -Thost=x64 ..\llvm

对于x64版本：

cmake -DLLVM_ENABLE_PROJECTS=clang -G "Visual Studio 15 2017" -A x64 -Thost=x64 ..\llvm

注意：最好只启用您的clang需要支持的目标，否则构建过程会非常缓慢。要仅构建您的clang支持的目标，请使用

-DLLVM_TARGETS_TO_BUILD=target_list

例如：

-DLLVM_TARGETS_TO_BUILD="X86;ARM"

所有目标的列表似乎在：

D:\software\LLVM\llvm\bindings\python\llvm\disassembler.py

它们是：

_targets = ['AArch64', 'ARM', 'Hexagon', 'MSP430', 'Mips', 'NVPTX', 'PowerPC', 'R600', 'Sparc', 'SystemZ', 'X86', 'XCore']

因此X86似乎同时包含x86和x64。

CMake将产生一个VS解决方案文件：

D:\software\LLVM\build-x86\LLVM.sln

使用VS2017打开它，您只需要构建“ Clang库”子组，我的构建是默认的Debug构建。

现在参考是https://kevinaboos.wordpress.com/2013/07/23/clang-tutorial-part-ii-libtooling-example/ 但是该页面中的代码适用于LLVM的较早版本，因此无法编译。

这是LLVM6.0.0的工作代码：

在VS2017中创建一个C ++控制台应用程序。

进入调试/ x86配置。

在项目属性对话框中，用于调试/ win32配置，

将“禁用特定警告”修改为：

将“其他包含目录”修改为：

D:\software\LLVM\clang\include;D:\software\LLVM\llvm\include;D:\software\LLVM\build-x86\include;D:\software\LLVM\build-x86\tools\clang\include;%(AdditionalIncludeDirectories)

将“其他图书馆目录”修改为：

D:\software\LLVM\build-x86\Debug\lib;%(AdditionalLibraryDirectories)

将“其他依赖项”修改为：

Mincore.lib;clangAnalysis.lib;clangARCMigrate.lib;clangAST.lib;clangASTMatchers.lib;clangBasic.lib;clangCodeGen.lib;clangCrossTU.lib;clangDriver.lib;clangDynamicASTMatchers.lib;clangEdit.lib;clangFormat.lib;clangFrontend.lib;clangFrontendTool.lib;clangHandleCXX.lib;clangIndex.lib;clangLex.lib;clangParse.lib;clangRewrite.lib;clangRewriteFrontend.lib;clangSema.lib;clangSerialization.lib;clangStaticAnalyzerCheckers.lib;clangStaticAnalyzerCore.lib;clangStaticAnalyzerFrontend.lib;clangTooling.lib;clangToolingASTDiff.lib;clangToolingCore.lib;clangToolingRefactor.lib;libclang.lib;LLVMAArch64AsmParser.lib;LLVMAArch64AsmPrinter.lib;LLVMAArch64CodeGen.lib;LLVMAArch64Desc.lib;LLVMAArch64Disassembler.lib;LLVMAArch64Info.lib;LLVMAArch64Utils.lib;LLVMAMDGPUAsmParser.lib;LLVMAMDGPUAsmPrinter.lib;LLVMAMDGPUCodeGen.lib;LLVMAMDGPUDesc.lib;LLVMAMDGPUDisassembler.lib;LLVMAMDGPUInfo.lib;LLVMAMDGPUUtils.lib;LLVMAnalysis.lib;LLVMARMAsmParser.lib;LLVMARMAsmPrinter.lib;LLVMARMCodeGen.lib;LLVMARMDesc.lib;LLVMARMDisassembler.lib;LLVMARMInfo.lib;LLVMARMUtils.lib;LLVMAsmParser.lib;LLVMAsmPrinter.lib;LLVMBinaryFormat.lib;LLVMBitReader.lib;LLVMBitWriter.lib;LLVMBPFAsmParser.lib;LLVMBPFAsmPrinter.lib;LLVMBPFCodeGen.lib;LLVMBPFDesc.lib;LLVMBPFDisassembler.lib;LLVMBPFInfo.lib;LLVMCodeGen.lib;LLVMCore.lib;LLVMDebugInfoCodeView.lib;LLVMDebugInfoMSF.lib;LLVMDemangle.lib;LLVMGlobalISel.lib;LLVMHexagonAsmParser.lib;LLVMHexagonCodeGen.lib;LLVMHexagonDesc.lib;LLVMHexagonDisassembler.lib;LLVMHexagonInfo.lib;LLVMInstCombine.lib;LLVMInstrumentation.lib;LLVMipo.lib;LLVMIRReader.lib;LLVMLanaiAsmParser.lib;LLVMLanaiAsmPrinter.lib;LLVMLanaiCodeGen.lib;LLVMLanaiDesc.lib;LLVMLanaiDisassembler.lib;LLVMLanaiInfo.lib;LLVMLinker.lib;LLVMMC.lib;LLVMMCDisassembler.lib;LLVMMCParser.lib;LLVMMipsAsmParser.lib;LLVMMipsAsmPrinter.lib;LLVMMipsCodeGen.lib;LLVMMipsDesc.lib;LLVMMipsDisassembler.lib;LLVMMipsInfo.lib;LLVMMSP430AsmPrinter.lib;LLVMMSP430CodeGen.lib;LLVMMSP430Desc.lib;LLVMMSP430Info.lib;LLVMNVPTXAsmPrinter.lib;LLVMNVPTXCodeGen.lib;LLVMNVPTXDesc.lib;LLVMNVPTXInfo.lib;LLVMObject.lib;LLVMOption.lib;LLVMPowerPCAsmParser.lib;LLVMPowerPCAsmPrinter.lib;LLVMPowerPCCodeGen.lib;LLVMPowerPCDesc.lib;LLVMPowerPCDisassembler.lib;LLVMPowerPCInfo.lib;LLVMProfileData.lib;LLVMScalarOpts.lib;LLVMSelectionDAG.lib;LLVMSparcAsmParser.lib;LLVMSparcAsmPrinter.lib;LLVMSparcCodeGen.lib;LLVMSparcDesc.lib;LLVMSparcDisassembler.lib;LLVMSparcInfo.lib;LLVMSupport.lib;LLVMSystemZAsmParser.lib;LLVMSystemZAsmPrinter.lib;LLVMSystemZCodeGen.lib;LLVMSystemZDesc.lib;LLVMSystemZDisassembler.lib;LLVMSystemZInfo.lib;LLVMTableGen.lib;LLVMTarget.lib;LLVMTransformUtils.lib;LLVMVectorize.lib;LLVMX86AsmParser.lib;LLVMX86AsmPrinter.lib;LLVMX86CodeGen.lib;LLVMX86Desc.lib;LLVMX86Disassembler.lib;LLVMX86Info.lib;LLVMX86Utils.lib;LLVMXCoreAsmPrinter.lib;LLVMXCoreCodeGen.lib;LLVMXCoreDesc.lib;LLVMXCoreDisassembler.lib;LLVMXCoreInfo.lib;

因为找不到有关要包含的库的信息，所以我将所有库都包含在D：\ software \ LLVM \ build-x86 \ Debug \ lib，以及Mincore.lib中。

这里是C＃代码，用于生成lib引用：

static void buildLLVMLibList()
{
    string s = "";
    foreach (string fn in Directory.GetFiles(
        //@"D:\software\LLVM\build-x64\Debug\lib"
        @"D:\software\LLVM\build-x86\Debug\lib"
        , "*.lib"))
    {
        s += new FileInfo(fn).Name + ";";
    }
    return;//break here
}

将pch.h修改为：

#ifndef PCH_H
#define PCH_H

// TODO: add headers that you want to pre-compile here
// Declares clang::SyntaxOnlyAction.
#include "clang/Frontend/FrontendActions.h"
#include "clang/Tooling/CommonOptionsParser.h"
#include "clang/Tooling/Tooling.h"
// Declares llvm::cl::extrahelp.
#include "llvm/Support/CommandLine.h"

#include "clang/Driver/Options.h"
#include "clang/AST/AST.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/RecursiveASTVisitor.h"
#include "clang/Frontend/ASTConsumers.h"
#include "clang/Frontend/FrontendActions.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Tooling/CommonOptionsParser.h"
#include "clang/Tooling/Tooling.h"
#include "clang/Rewrite/Core/Rewriter.h"

using namespace std;
using namespace clang;
using namespace clang::driver;
using namespace clang::tooling;
using namespace llvm;

#endif //PCH_H

将主cpp文件修改为：

#include "pch.h"
#include <iostream>



Rewriter rewriter;
int numFunctions = 0;
llvm::cl::OptionCategory MyToolCategory("my-tool options");

class ExampleVisitor : public RecursiveASTVisitor<ExampleVisitor> {
private:
    ASTContext *astContext; // used for getting additional AST info

public:
    explicit ExampleVisitor(CompilerInstance *CI)
        : astContext(&(CI->getASTContext())) // initialize private members
    {
        rewriter.setSourceMgr(astContext->getSourceManager(),
            astContext->getLangOpts());
    }

    virtual bool VisitFunctionDecl(FunctionDecl *func) {
        numFunctions++;
        string funcName = func->getNameInfo().getName().getAsString();
        if (funcName == "do_math") {
            rewriter.ReplaceText(func->getLocation(), funcName.length(), "add5");
            errs() << "** Rewrote function def: " << funcName << "\n";
        }
        return true;
    }

    virtual bool VisitStmt(Stmt *st) {
        if (ReturnStmt *ret = dyn_cast<ReturnStmt>(st)) {
            rewriter.ReplaceText(ret->getRetValue()->getLocStart(), 6, "val");
            errs() << "** Rewrote ReturnStmt\n";
        }
        if (CallExpr *call = dyn_cast<CallExpr>(st)) {
            rewriter.ReplaceText(call->getLocStart(), 7, "add5");
            errs() << "** Rewrote function call\n";
        }
        return true;
    }
};


class ExampleASTConsumer : public ASTConsumer {
private:
    ExampleVisitor *visitor; // doesn't have to be private

public:
    // override the constructor in order to pass CI
    explicit ExampleASTConsumer(CompilerInstance *CI)
        : visitor(new ExampleVisitor(CI)) // initialize the visitor
    { }

    // override this to call our ExampleVisitor on the entire source file
    virtual void HandleTranslationUnit(ASTContext &Context) {
        /* we can use ASTContext to get the TranslationUnitDecl, which is
             a single Decl that collectively represents the entire source file */
        visitor->TraverseDecl(Context.getTranslationUnitDecl());
    }

};



class ExampleFrontendAction : public ASTFrontendAction {
public:

    void EndSourceFileAction() override {
        llvm::outs() << "END OF FILE ACTION:\n";
        rewriter.getEditBuffer(rewriter.getSourceMgr().getMainFileID()).write(errs());
    }

    virtual std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &CI, StringRef file) {
        return  std::unique_ptr<ASTConsumer>(new ExampleASTConsumer(&CI)); // pass CI pointer to ASTConsumer
    }
};


extern llvm::cl::OptionCategory MyToolCategory;

int main(int argc, const char **argv) {
    // parse the command-line args passed to your code
    CommonOptionsParser op(argc, argv, MyToolCategory);
    // create a new Clang Tool instance (a LibTooling environment)
    ClangTool Tool(op.getCompilations(), op.getSourcePathList());

    // run the Clang Tool, creating a new FrontendAction (explained below)
    int result = Tool.run(newFrontendActionFactory<ExampleFrontendAction>().get());

    errs() << "\nFound " << numFunctions << " functions.\n\n";
    // print out the rewritten source code ("rewriter" is a global var.)

    std::cin.get();
    return result;
}

然后创建一个testC ++文件，例如：

D:\LLVM\TestSource.cpp

其内容如下：

void do_math(int *x) {
    *x += 5;
}

int main(void) {
    int result = -1, val = 4;
    do_math(&val);
    return result;
}

然后在项目属性中，将“命令参数”修改为：

"D:\LLVM\TestSource.cpp"

然后该项目将成功构建和调试。

对于debug / x64配置，请将项目属性修改为：

包含路径：

D:\software\LLVM\clang\include;D:\software\LLVM\llvm\include;D:\software\LLVM\build-x64\include;D:\software\LLVM\build-x64\tools\clang\include;%(AdditionalIncludeDirectories)

库路径：

D:\software\LLVM\build-x64\Debug\lib;%(AdditionalLibraryDirectories)

库（与x86库不同）：

Mincore.lib;clangAnalysis.lib;clangARCMigrate.lib;clangAST.lib;clangASTMatchers.lib;clangBasic.lib;clangCodeGen.lib;clangCrossTU.lib;clangDriver.lib;clangDynamicASTMatchers.lib;clangEdit.lib;clangFormat.lib;clangFrontend.lib;clangFrontendTool.lib;clangHandleCXX.lib;clangIndex.lib;clangLex.lib;clangParse.lib;clangRewrite.lib;clangRewriteFrontend.lib;clangSema.lib;clangSerialization.lib;clangStaticAnalyzerCheckers.lib;clangStaticAnalyzerCore.lib;clangStaticAnalyzerFrontend.lib;clangTooling.lib;clangToolingASTDiff.lib;clangToolingCore.lib;clangToolingRefactor.lib;gtest.lib;libclang.lib;LLVMAArch64AsmParser.lib;LLVMAArch64AsmPrinter.lib;LLVMAArch64CodeGen.lib;LLVMAArch64Desc.lib;LLVMAArch64Disassembler.lib;LLVMAArch64Info.lib;LLVMAArch64Utils.lib;LLVMAMDGPUAsmParser.lib;LLVMAMDGPUAsmPrinter.lib;LLVMAMDGPUCodeGen.lib;LLVMAMDGPUDesc.lib;LLVMAMDGPUDisassembler.lib;LLVMAMDGPUInfo.lib;LLVMAMDGPUUtils.lib;LLVMAnalysis.lib;LLVMARMAsmParser.lib;LLVMARMAsmPrinter.lib;LLVMARMCodeGen.lib;LLVMARMDesc.lib;LLVMARMDisassembler.lib;LLVMARMInfo.lib;LLVMARMUtils.lib;LLVMAsmParser.lib;LLVMAsmPrinter.lib;LLVMBinaryFormat.lib;LLVMBitReader.lib;LLVMBitWriter.lib;LLVMBPFAsmParser.lib;LLVMBPFAsmPrinter.lib;LLVMBPFCodeGen.lib;LLVMBPFDesc.lib;LLVMBPFDisassembler.lib;LLVMBPFInfo.lib;LLVMCodeGen.lib;LLVMCore.lib;LLVMDebugInfoCodeView.lib;LLVMDebugInfoDWARF.lib;LLVMDebugInfoMSF.lib;LLVMDebugInfoPDB.lib;LLVMDemangle.lib;LLVMGlobalISel.lib;LLVMHexagonAsmParser.lib;LLVMHexagonCodeGen.lib;LLVMHexagonDesc.lib;LLVMHexagonDisassembler.lib;LLVMHexagonInfo.lib;LLVMInstCombine.lib;LLVMInstrumentation.lib;LLVMipo.lib;LLVMIRReader.lib;LLVMLanaiAsmParser.lib;LLVMLanaiAsmPrinter.lib;LLVMLanaiCodeGen.lib;LLVMLanaiDesc.lib;LLVMLanaiDisassembler.lib;LLVMLanaiInfo.lib;LLVMLinker.lib;LLVMMC.lib;LLVMMCDisassembler.lib;LLVMMCParser.lib;LLVMMipsAsmParser.lib;LLVMMipsAsmPrinter.lib;LLVMMipsCodeGen.lib;LLVMMipsDesc.lib;LLVMMipsDisassembler.lib;LLVMMipsInfo.lib;LLVMMSP430AsmPrinter.lib;LLVMMSP430CodeGen.lib;LLVMMSP430Desc.lib;LLVMMSP430Info.lib;LLVMNVPTXAsmPrinter.lib;LLVMNVPTXCodeGen.lib;LLVMNVPTXDesc.lib;LLVMNVPTXInfo.lib;LLVMObject.lib;LLVMOption.lib;LLVMPowerPCAsmParser.lib;LLVMPowerPCAsmPrinter.lib;LLVMPowerPCCodeGen.lib;LLVMPowerPCDesc.lib;LLVMPowerPCDisassembler.lib;LLVMPowerPCInfo.lib;LLVMProfileData.lib;LLVMScalarOpts.lib;LLVMSelectionDAG.lib;LLVMSparcAsmParser.lib;LLVMSparcAsmPrinter.lib;LLVMSparcCodeGen.lib;LLVMSparcDesc.lib;LLVMSparcDisassembler.lib;LLVMSparcInfo.lib;LLVMSupport.lib;LLVMSymbolize.lib;LLVMSystemZAsmParser.lib;LLVMSystemZAsmPrinter.lib;LLVMSystemZCodeGen.lib;LLVMSystemZDesc.lib;LLVMSystemZDisassembler.lib;LLVMSystemZInfo.lib;LLVMTableGen.lib;LLVMTarget.lib;LLVMTransformUtils.lib;LLVMVectorize.lib;LLVMX86AsmParser.lib;LLVMX86AsmPrinter.lib;LLVMX86CodeGen.lib;LLVMX86Desc.lib;LLVMX86Disassembler.lib;LLVMX86Info.lib;LLVMX86Utils.lib;LLVMXCoreAsmPrinter.lib;LLVMXCoreCodeGen.lib;LLVMXCoreDesc.lib;LLVMXCoreDisassembler.lib;LLVMXCoreInfo.lib;

禁用特定警告：

命令参数：

"D:\LLVM\TestSource.cpp"

最重要的是您必须移动代码

rewriter.getEditBuffer(rewriter.getSourceMgr().getMainFileID()).write(errs());

在上述从主函数到ExampleFrontendAction :: EndSourceFileAction的引用中，否则将出现奇怪的访问异常。

Answer 3

使用VisualGDB或类似的应用程序，可以在Visual Studio上编写代码并在linux机器上编译它。这就是我现在正在做的事情。我已经在linux虚拟机上安装了clang，在我的Windows 7操作系统中，我有一个Visual Studio 2010.它运行得很好。

如何在Visual Studio中使用LibTooling / Clang？

3 个答案: