Import sectionify pass from llvm-apps
Change-Id: I3e3ac102b4898ca22ed1d9c25ec309d77bbe32de
This commit is contained in:
David van Moolenbroek
parent
3956ee9eed
commit
b5e2faaaaf
3 changed files with 281 additions and 0 deletions
37
minix/llvm/passes/include/sectionify/SectionifyPass.h
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37
minix/llvm/passes/include/sectionify/SectionifyPass.h
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#ifndef SECTIONIFY_PASS_H
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#define SECTIONIFY_PASS_H
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#define DEBUG_TYPE "sectionify"
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#include <pass.h>
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using namespace llvm;
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namespace llvm {
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class SectionifyPass : public ModulePass {
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public:
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static char ID;
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SectionifyPass();
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virtual bool runOnModule(Module &M);
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private:
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std::map<Regex*, std::string> functionRegexMap;
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std::vector<Regex*> functionRegexList;
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std::map<Regex*, std::string> dataRegexMap;
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std::vector<Regex*> dataRegexList;
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std::string moduleName;
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bool sectionifyFromRegex(GlobalValue *value, Regex *regex, std::string §ion);
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bool sectionify(GlobalValue *value, std::vector<Regex*> ®exList, std::map<Regex*, std::string> ®exMap);
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void parseAndInitRegexMap(cl::list<std::string> &stringListOpt, std::vector<Regex*> ®exList, std::map<Regex*, std::string> ®exMap, std::string regexType);
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bool initRegexMap(std::map<Regex*, std::string> ®exMap, std::vector<Regex*> ®exList, std::map<std::string, std::string> &stringMap, std::vector<std::string> &stringList, std::string regexType);
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bool parseStringMapOpt(std::map<std::string, std::string> &map, std::vector<std::string> &keyList, std::vector<std::string> &stringList);
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};
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}
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#endif
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6
minix/llvm/passes/sectionify/Makefile
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6
minix/llvm/passes/sectionify/Makefile
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PASSNAME:= sectionify
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OBJS := SectionifyPass.o
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HEADERS = $(wildcard ../include/magic/support/*.h)
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include ../Makefile.inc
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238
minix/llvm/passes/sectionify/SectionifyPass.cpp
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238
minix/llvm/passes/sectionify/SectionifyPass.cpp
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#include <sectionify/SectionifyPass.h>
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using namespace llvm;
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static cl::list<std::string>
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sectionMapOpt("sectionify-section-map",
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cl::desc("Specify all the comma-separated symbol_regex/section pairs which need to be sectionified. \"NULL\" section doesn't sectionify."),
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cl::ZeroOrMore, cl::CommaSeparated, cl::NotHidden, cl::ValueRequired);
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static cl::list<std::string>
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functionSectionMapOpt("sectionify-function-section-map",
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cl::desc("Specify all the comma-separated function_regex/section pairs which need to be sectionified"),
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cl::ZeroOrMore, cl::CommaSeparated, cl::NotHidden, cl::ValueRequired);
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static cl::list<std::string>
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dataSectionMapOpt("sectionify-data-section-map",
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cl::desc("Specify all the comma-separated data_regex/section pairs which need to be sectionified"),
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cl::ZeroOrMore, cl::CommaSeparated, cl::NotHidden, cl::ValueRequired);
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static cl::opt<std::string>
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prefixOpt("sectionify-prefix",
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cl::desc("Specify the prefix-string for prefixing names of global variables and functions"),
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cl::Optional, cl::NotHidden, cl::ValueRequired);
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static cl::opt<bool>
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sectionifyExternalFunctions("sectionify-function-external",
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llvm::cl::desc("Also sectionify external functions"),
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cl::init(false));
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static cl::opt<bool>
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sectionifyExternalData("sectionify-data-external",
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llvm::cl::desc("Also sectionify external data"),
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cl::init(false));
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static cl::opt<bool>
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sectionifySkipReadOnlyData("sectionify-data-skip-read-only",
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llvm::cl::desc("Don't sectionify read-only data"),
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cl::init(false));
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static cl::opt<bool>
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sectionifyTLSData("sectionify-data-tls",
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llvm::cl::desc("Also sectionify tls data"),
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cl::init(false));
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static cl::opt<bool>
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sectionifyNoOverride("sectionify-no-override",
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llvm::cl::desc("Do not override existing sections"),
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cl::init(false));
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STATISTIC(numSectionifiedGVs, "Number of sectionified global variables");
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STATISTIC(numSectionifiedFuncs, "Number of sectionified functions");
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namespace llvm {
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//===----------------------------------------------------------------------===//
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// Constructors, destructor, and operators
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//===----------------------------------------------------------------------===//
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SectionifyPass::SectionifyPass() : ModulePass(ID) {}
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//===----------------------------------------------------------------------===//
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// Public methods
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//===----------------------------------------------------------------------===//
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bool SectionifyPass::runOnModule(Module &M) {
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bool sectionified = false;
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Module::GlobalListType &globalList = M.getGlobalList();
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Module::FunctionListType &functionList = M.getFunctionList();
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functionSectionMapOpt.insert(functionSectionMapOpt.end(), sectionMapOpt.begin(), sectionMapOpt.end());
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dataSectionMapOpt.insert(dataSectionMapOpt.end(), sectionMapOpt.begin(), sectionMapOpt.end());
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parseAndInitRegexMap(functionSectionMapOpt, functionRegexList, functionRegexMap, "function");
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parseAndInitRegexMap(dataSectionMapOpt, dataRegexList, dataRegexMap, "data");
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moduleName = "";
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if ("" != prefixOpt && "%MODULE_NAME%" == prefixOpt)
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{
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PassUtil::getModuleName(M, NULL, NULL, &moduleName);
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}
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for (Module::global_iterator it = globalList.begin(); it != globalList.end(); ++it) {
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GlobalVariable *GV = it;
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if (GV->isDeclaration() && !sectionifyExternalData) {
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DEBUG(errs() << "Skipping external GlobalVariable " << GV->getName() << "\n");
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continue;
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}
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if (GV->isConstant() && sectionifySkipReadOnlyData) {
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DEBUG(errs() << "Skipping read-only GlobalVariable " << GV->getName() << "\n");
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continue;
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}
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if (GV->isThreadLocal() && !sectionifyTLSData) {
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DEBUG(errs() << "Skipping TLS GlobalVariable " << GV->getName() << "\n");
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continue;
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}
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if (GV->hasSection() && sectionifyNoOverride) {
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DEBUG(errs() << "Skipping sectionified GlobalVariable " << GV->getName() << "\n");
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continue;
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}
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if (GV->getName().startswith("llvm.")) {
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DEBUG(errs() << "Skipping LLVM instrinsic GlobalVariable " << GV->getName() << "\n");
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continue;
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}
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if (sectionify(GV, dataRegexList, dataRegexMap)) {
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numSectionifiedGVs++;
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sectionified = true;
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}
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}
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for (Module::iterator it = functionList.begin(); it != functionList.end(); ++it) {
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Function *F = it;
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if (F->isDeclaration() && !sectionifyExternalFunctions) {
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DEBUG(errs() << "Skipping external Function " << F->getName() << "\n");
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continue;
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}
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if (F->hasSection() && sectionifyNoOverride) {
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DEBUG(errs() << "Skipping sectionified Function " << F->getName() << "\n");
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continue;
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}
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if (F->getName().startswith("llvm.")) {
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DEBUG(errs() << "Skipping LLVM instrinsic Function " << F->getName() << "\n");
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continue;
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}
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if (sectionify(F, functionRegexList, functionRegexMap)) {
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numSectionifiedFuncs++;
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sectionified = true;
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}
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}
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return sectionified;
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}
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bool SectionifyPass::sectionifyFromRegex(GlobalValue *value, Regex *regex, std::string §ion)
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{
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bool returnValue = false;
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if("NULL" != section && regex->match(value->getName(), NULL)) {
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std::string trgSection = section;
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std::string valueStrPrefix = "";
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GlobalVariable *GV = dyn_cast<GlobalVariable>(value);
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if (GV && GV->isConstant()) {
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trgSection += "_ro";
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valueStrPrefix = "read-only ";
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}
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DEBUG(errs() << "Sectionified " << valueStrPrefix << (isa<Function>(value) ? "Function " : "GlobalVariable ") << value->getName() << " with section " << trgSection << "\n");
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value->setSection(trgSection);
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if (value->hasCommonLinkage()) {
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value->setLinkage(GlobalValue::WeakAnyLinkage);
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}
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returnValue = true;
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}
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if ("" != prefixOpt)
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{
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std::string originalName = value->getName();
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std::string prefixString = "";
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if ("" != moduleName)
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{
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prefixString = moduleName;
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}
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else
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{
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prefixString = prefixOpt;
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}
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DEBUG(errs() << "Prefixing the " << (isa<Function>(value) ? "Function name " : "GlobalVariable name ") << originalName << " with " << prefixString << "\n");
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std::string prefixedName = prefixString + originalName;
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value->setName(prefixedName);
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returnValue = true;
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}
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return returnValue;
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}
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bool SectionifyPass::sectionify(GlobalValue *value, std::vector<Regex*> ®exList, std::map<Regex*, std::string> ®exMap)
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{
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std::map<Regex*, std::string>::iterator regexMapIt;
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for (std::vector<Regex*>::iterator it = regexList.begin(); it != regexList.end(); ++it) {
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Regex *regex = *it;
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regexMapIt = regexMap.find(regex);
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assert(regexMapIt != regexMap.end());
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std::string section = regexMapIt->second;
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if (sectionifyFromRegex(value, regex, section)) {
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return true;
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}
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}
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return false;
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}
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bool SectionifyPass::parseStringMapOpt(std::map<std::string, std::string> &map, std::vector<std::string> &keyList, std::vector<std::string> &stringList)
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{
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for (std::vector<std::string>::iterator it = stringList.begin(); it != stringList.end(); ++it) {
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StringRef token = *it;
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SmallVector< StringRef, 2 > tokenVector;
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token.split(tokenVector, "/");
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if(tokenVector.size() != 2) {
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return false;
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}
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StringRef value = tokenVector.pop_back_val();
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StringRef key = tokenVector.pop_back_val();
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map.insert( std::pair<std::string, std::string>(key, value) );
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keyList.push_back(key);
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}
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return true;
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}
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void SectionifyPass::parseAndInitRegexMap(cl::list<std::string> &stringListOpt, std::vector<Regex*> ®exList, std::map<Regex*, std::string> ®exMap, std::string regexType)
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{
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std::map<std::string, std::string> sectionMap;
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std::vector<std::string> sectionList;
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if (!parseStringMapOpt(sectionMap, sectionList, stringListOpt) || !initRegexMap(regexMap, regexList, sectionMap, sectionList, regexType)) {
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stringListOpt.error("Invalid format!");
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exit(1);
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}
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}
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bool SectionifyPass::initRegexMap(std::map<Regex*, std::string> ®exMap, std::vector<Regex*> ®exList, std::map<std::string, std::string> &stringMap, std::vector<std::string> &stringList, std::string regexType)
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{
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std::map<std::string, std::string>::iterator stringMapIt;
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for (std::vector<std::string>::iterator it = stringList.begin(); it != stringList.end(); ++it) {
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std::string key = *it;
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stringMapIt = stringMap.find(key);
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assert(stringMapIt != stringMap.end());
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std::string value = stringMapIt->second;
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std::string error;
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Regex *regex = new Regex(key, 0);
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if(!regex->isValid(error)) {
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return false;
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}
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DEBUG(errs() << "Using " << regexType << " regex " << key << " with section " << value << "\n");
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regexMap.insert(std::pair<Regex*, std::string>(regex, value));
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regexList.push_back(regex);
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}
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return true;
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}
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} // end namespace
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char SectionifyPass::ID = 1;
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static RegisterPass<SectionifyPass> AP("sectionify", "Sectionify Pass");
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