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LTOModule.cpp: Fix numerous style issues.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110751 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar
parent
af08a36bd6
commit
b06913dd18
@ -4,10 +4,10 @@
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the Link Time Optimization library. This library is
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// This file implements the Link Time Optimization library. This library is
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// intended to be used by linker to optimize code at link time.
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//
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//===----------------------------------------------------------------------===//
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@ -36,495 +36,472 @@
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using namespace llvm;
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bool LTOModule::isBitcodeFile(const void* mem, size_t length)
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{
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return llvm::sys::IdentifyFileType((char*)mem, length)
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== llvm::sys::Bitcode_FileType;
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bool LTOModule::isBitcodeFile(const void *mem, size_t length) {
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return llvm::sys::IdentifyFileType((char*)mem, length)
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== llvm::sys::Bitcode_FileType;
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}
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bool LTOModule::isBitcodeFile(const char* path)
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{
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return llvm::sys::Path(path).isBitcodeFile();
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bool LTOModule::isBitcodeFile(const char *path) {
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return llvm::sys::Path(path).isBitcodeFile();
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}
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bool LTOModule::isBitcodeFileForTarget(const void* mem, size_t length,
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const char* triplePrefix)
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{
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MemoryBuffer* buffer = makeBuffer(mem, length);
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if (!buffer)
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return false;
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return isTargetMatch(buffer, triplePrefix);
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}
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bool LTOModule::isBitcodeFileForTarget(const char* path,
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const char* triplePrefix)
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{
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MemoryBuffer *buffer = MemoryBuffer::getFile(path);
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if (buffer == NULL)
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return false;
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return isTargetMatch(buffer, triplePrefix);
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}
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// takes ownership of buffer
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bool LTOModule::isTargetMatch(MemoryBuffer* buffer, const char* triplePrefix)
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{
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OwningPtr<Module> m(getLazyBitcodeModule(buffer, getGlobalContext()));
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// on success, m owns buffer and both are deleted at end of this method
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if (!m) {
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delete buffer;
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return false;
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}
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std::string actualTarget = m->getTargetTriple();
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return (strncmp(actualTarget.c_str(), triplePrefix,
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strlen(triplePrefix)) == 0);
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}
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LTOModule::LTOModule(Module* m, TargetMachine* t)
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: _module(m), _target(t), _symbolsParsed(false)
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{
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}
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LTOModule* LTOModule::makeLTOModule(const char* path,
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std::string& errMsg)
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{
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OwningPtr<MemoryBuffer> buffer(MemoryBuffer::getFile(path, &errMsg));
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if (!buffer)
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return NULL;
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return makeLTOModule(buffer.get(), errMsg);
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}
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/// makeBuffer - create a MemoryBuffer from a memory range.
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/// MemoryBuffer requires the byte past end of the buffer to be a zero.
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/// We might get lucky and already be that way, otherwise make a copy.
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/// Also if next byte is on a different page, don't assume it is readable.
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MemoryBuffer* LTOModule::makeBuffer(const void* mem, size_t length)
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{
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const char *startPtr = (char*)mem;
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const char *endPtr = startPtr+length;
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if (((uintptr_t)endPtr & (sys::Process::GetPageSize()-1)) == 0 ||
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*endPtr != 0)
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return MemoryBuffer::getMemBufferCopy(StringRef(startPtr, length));
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return MemoryBuffer::getMemBuffer(StringRef(startPtr, length));
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}
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LTOModule* LTOModule::makeLTOModule(const void* mem, size_t length,
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std::string& errMsg)
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{
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OwningPtr<MemoryBuffer> buffer(makeBuffer(mem, length));
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if (!buffer)
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return NULL;
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return makeLTOModule(buffer.get(), errMsg);
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}
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LTOModule* LTOModule::makeLTOModule(MemoryBuffer* buffer,
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std::string& errMsg)
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{
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InitializeAllTargets();
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// parse bitcode buffer
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OwningPtr<Module> m(ParseBitcodeFile(buffer, getGlobalContext(), &errMsg));
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if (!m)
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return NULL;
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std::string Triple = m->getTargetTriple();
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if (Triple.empty())
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Triple = sys::getHostTriple();
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// find machine architecture for this module
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const Target* march = TargetRegistry::lookupTarget(Triple, errMsg);
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if (!march)
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return NULL;
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// construct LTModule, hand over ownership of module and target
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SubtargetFeatures Features;
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Features.getDefaultSubtargetFeatures("" /* cpu */, llvm::Triple(Triple));
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std::string FeatureStr = Features.getString();
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TargetMachine* target = march->createTargetMachine(Triple, FeatureStr);
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return new LTOModule(m.take(), target);
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}
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const char* LTOModule::getTargetTriple()
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{
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return _module->getTargetTriple().c_str();
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}
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void LTOModule::setTargetTriple(const char *triple)
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{
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_module->setTargetTriple(triple);
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}
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void LTOModule::addDefinedFunctionSymbol(Function* f, Mangler &mangler)
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{
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// add to list of defined symbols
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addDefinedSymbol(f, mangler, true);
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// add external symbols referenced by this function.
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for (Function::iterator b = f->begin(); b != f->end(); ++b) {
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for (BasicBlock::iterator i = b->begin(); i != b->end(); ++i) {
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for (unsigned count = 0, total = i->getNumOperands();
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count != total; ++count) {
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findExternalRefs(i->getOperand(count), mangler);
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}
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}
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}
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}
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// get string that data pointer points to
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bool LTOModule::objcClassNameFromExpression(Constant* c, std::string& name)
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{
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if (ConstantExpr* ce = dyn_cast<ConstantExpr>(c)) {
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Constant* op = ce->getOperand(0);
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if (GlobalVariable* gvn = dyn_cast<GlobalVariable>(op)) {
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Constant* cn = gvn->getInitializer();
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if (ConstantArray* ca = dyn_cast<ConstantArray>(cn)) {
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if (ca->isCString()) {
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name = ".objc_class_name_" + ca->getAsString();
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return true;
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}
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}
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}
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}
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bool LTOModule::isBitcodeFileForTarget(const void *mem, size_t length,
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const char *triplePrefix) {
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MemoryBuffer *buffer = makeBuffer(mem, length);
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if (!buffer)
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return false;
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return isTargetMatch(buffer, triplePrefix);
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}
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// parse i386/ppc ObjC class data structure
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void LTOModule::addObjCClass(GlobalVariable* clgv)
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bool LTOModule::isBitcodeFileForTarget(const char *path,
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const char *triplePrefix) {
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MemoryBuffer *buffer = MemoryBuffer::getFile(path);
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if (buffer == NULL)
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return false;
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return isTargetMatch(buffer, triplePrefix);
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}
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// Takes ownership of buffer.
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bool LTOModule::isTargetMatch(MemoryBuffer *buffer, const char *triplePrefix) {
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OwningPtr<Module> m(getLazyBitcodeModule(buffer, getGlobalContext()));
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// On success, m owns buffer and both are deleted at end of this method.
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if (!m) {
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delete buffer;
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return false;
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}
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std::string actualTarget = m->getTargetTriple();
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return (strncmp(actualTarget.c_str(), triplePrefix,
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strlen(triplePrefix)) == 0);
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}
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LTOModule::LTOModule(Module *m, TargetMachine *t)
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: _module(m), _target(t), _symbolsParsed(false)
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{
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if (ConstantStruct* c = dyn_cast<ConstantStruct>(clgv->getInitializer())) {
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// second slot in __OBJC,__class is pointer to superclass name
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std::string superclassName;
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if (objcClassNameFromExpression(c->getOperand(1), superclassName)) {
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NameAndAttributes info;
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if (_undefines.find(superclassName.c_str()) == _undefines.end()) {
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const char* symbolName = ::strdup(superclassName.c_str());
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info.name = ::strdup(symbolName);
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info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
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// string is owned by _undefines
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_undefines[info.name] = info;
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}
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}
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// third slot in __OBJC,__class is pointer to class name
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std::string className;
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if (objcClassNameFromExpression(c->getOperand(2), className)) {
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const char* symbolName = ::strdup(className.c_str());
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NameAndAttributes info;
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info.name = symbolName;
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info.attributes = (lto_symbol_attributes)
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(LTO_SYMBOL_PERMISSIONS_DATA |
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LTO_SYMBOL_DEFINITION_REGULAR |
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LTO_SYMBOL_SCOPE_DEFAULT);
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_symbols.push_back(info);
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_defines[info.name] = 1;
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}
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}
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LTOModule *LTOModule::makeLTOModule(const char *path,
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std::string &errMsg) {
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OwningPtr<MemoryBuffer> buffer(MemoryBuffer::getFile(path, &errMsg));
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if (!buffer)
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return NULL;
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return makeLTOModule(buffer.get(), errMsg);
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}
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/// makeBuffer - Create a MemoryBuffer from a memory range. MemoryBuffer
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/// requires the byte past end of the buffer to be a zero. We might get lucky
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/// and already be that way, otherwise make a copy. Also if next byte is on a
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/// different page, don't assume it is readable.
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MemoryBuffer *LTOModule::makeBuffer(const void *mem, size_t length) {
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const char *startPtr = (char*)mem;
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const char *endPtr = startPtr+length;
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if (((uintptr_t)endPtr & (sys::Process::GetPageSize()-1)) == 0 ||
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*endPtr != 0)
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return MemoryBuffer::getMemBufferCopy(StringRef(startPtr, length));
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return MemoryBuffer::getMemBuffer(StringRef(startPtr, length));
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}
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LTOModule *LTOModule::makeLTOModule(const void *mem, size_t length,
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std::string &errMsg) {
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OwningPtr<MemoryBuffer> buffer(makeBuffer(mem, length));
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if (!buffer)
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return NULL;
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return makeLTOModule(buffer.get(), errMsg);
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}
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LTOModule *LTOModule::makeLTOModule(MemoryBuffer *buffer,
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std::string &errMsg) {
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InitializeAllTargets();
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// parse bitcode buffer
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OwningPtr<Module> m(ParseBitcodeFile(buffer, getGlobalContext(), &errMsg));
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if (!m)
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return NULL;
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std::string Triple = m->getTargetTriple();
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if (Triple.empty())
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Triple = sys::getHostTriple();
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// find machine architecture for this module
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const Target *march = TargetRegistry::lookupTarget(Triple, errMsg);
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if (!march)
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return NULL;
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// construct LTModule, hand over ownership of module and target
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SubtargetFeatures Features;
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Features.getDefaultSubtargetFeatures("" /* cpu */, llvm::Triple(Triple));
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std::string FeatureStr = Features.getString();
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TargetMachine *target = march->createTargetMachine(Triple, FeatureStr);
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return new LTOModule(m.take(), target);
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}
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const char *LTOModule::getTargetTriple() {
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return _module->getTargetTriple().c_str();
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}
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void LTOModule::setTargetTriple(const char *triple) {
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_module->setTargetTriple(triple);
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}
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void LTOModule::addDefinedFunctionSymbol(Function *f, Mangler &mangler) {
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// add to list of defined symbols
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addDefinedSymbol(f, mangler, true);
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// add external symbols referenced by this function.
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for (Function::iterator b = f->begin(); b != f->end(); ++b) {
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for (BasicBlock::iterator i = b->begin(); i != b->end(); ++i) {
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for (unsigned count = 0, total = i->getNumOperands();
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count != total; ++count) {
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findExternalRefs(i->getOperand(count), mangler);
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}
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}
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}
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}
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// parse i386/ppc ObjC category data structure
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void LTOModule::addObjCCategory(GlobalVariable* clgv)
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{
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if (ConstantStruct* c = dyn_cast<ConstantStruct>(clgv->getInitializer())) {
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// second slot in __OBJC,__category is pointer to target class name
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std::string targetclassName;
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if (objcClassNameFromExpression(c->getOperand(1), targetclassName)) {
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NameAndAttributes info;
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if (_undefines.find(targetclassName.c_str()) == _undefines.end()) {
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const char* symbolName = ::strdup(targetclassName.c_str());
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info.name = ::strdup(symbolName);
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info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
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// string is owned by _undefines
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_undefines[info.name] = info;
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}
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// Get string that data pointer points to.
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bool LTOModule::objcClassNameFromExpression(Constant *c, std::string &name) {
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if (ConstantExpr *ce = dyn_cast<ConstantExpr>(c)) {
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Constant *op = ce->getOperand(0);
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if (GlobalVariable *gvn = dyn_cast<GlobalVariable>(op)) {
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Constant *cn = gvn->getInitializer();
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if (ConstantArray *ca = dyn_cast<ConstantArray>(cn)) {
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if (ca->isCString()) {
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name = ".objc_class_name_" + ca->getAsString();
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return true;
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}
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}
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}
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}
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return false;
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}
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// Parse i386/ppc ObjC class data structure.
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void LTOModule::addObjCClass(GlobalVariable *clgv) {
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if (ConstantStruct *c = dyn_cast<ConstantStruct>(clgv->getInitializer())) {
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// second slot in __OBJC,__class is pointer to superclass name
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std::string superclassName;
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if (objcClassNameFromExpression(c->getOperand(1), superclassName)) {
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NameAndAttributes info;
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if (_undefines.find(superclassName.c_str()) == _undefines.end()) {
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const char *symbolName = ::strdup(superclassName.c_str());
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info.name = ::strdup(symbolName);
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info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
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// string is owned by _undefines
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_undefines[info.name] = info;
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}
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}
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// third slot in __OBJC,__class is pointer to class name
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std::string className;
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if (objcClassNameFromExpression(c->getOperand(2), className)) {
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const char *symbolName = ::strdup(className.c_str());
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NameAndAttributes info;
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info.name = symbolName;
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info.attributes = (lto_symbol_attributes)
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(LTO_SYMBOL_PERMISSIONS_DATA |
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LTO_SYMBOL_DEFINITION_REGULAR |
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LTO_SYMBOL_SCOPE_DEFAULT);
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_symbols.push_back(info);
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_defines[info.name] = 1;
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}
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}
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}
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// parse i386/ppc ObjC class list data structure
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void LTOModule::addObjCClassRef(GlobalVariable* clgv)
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{
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// Parse i386/ppc ObjC category data structure.
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void LTOModule::addObjCCategory(GlobalVariable *clgv) {
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if (ConstantStruct *c = dyn_cast<ConstantStruct>(clgv->getInitializer())) {
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// second slot in __OBJC,__category is pointer to target class name
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std::string targetclassName;
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if (objcClassNameFromExpression(clgv->getInitializer(), targetclassName)) {
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NameAndAttributes info;
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if (_undefines.find(targetclassName.c_str()) == _undefines.end()) {
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const char* symbolName = ::strdup(targetclassName.c_str());
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info.name = ::strdup(symbolName);
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info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
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// string is owned by _undefines
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_undefines[info.name] = info;
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}
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if (objcClassNameFromExpression(c->getOperand(1), targetclassName)) {
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NameAndAttributes info;
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if (_undefines.find(targetclassName.c_str()) == _undefines.end()) {
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const char *symbolName = ::strdup(targetclassName.c_str());
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info.name = ::strdup(symbolName);
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info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
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// string is owned by _undefines
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_undefines[info.name] = info;
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}
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}
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}
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}
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void LTOModule::addDefinedDataSymbol(GlobalValue* v, Mangler& mangler)
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{
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// add to list of defined symbols
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addDefinedSymbol(v, mangler, false);
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// Special case i386/ppc ObjC data structures in magic sections:
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// The issue is that the old ObjC object format did some strange
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// contortions to avoid real linker symbols. For instance, the
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// ObjC class data structure is allocated statically in the executable
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// that defines that class. That data structures contains a pointer to
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// its superclass. But instead of just initializing that part of the
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// struct to the address of its superclass, and letting the static and
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// dynamic linkers do the rest, the runtime works by having that field
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// instead point to a C-string that is the name of the superclass.
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// At runtime the objc initialization updates that pointer and sets
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// it to point to the actual super class. As far as the linker
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// knows it is just a pointer to a string. But then someone wanted the
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// linker to issue errors at build time if the superclass was not found.
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// So they figured out a way in mach-o object format to use an absolute
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// symbols (.objc_class_name_Foo = 0) and a floating reference
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// (.reference .objc_class_name_Bar) to cause the linker into erroring when
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// a class was missing.
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// The following synthesizes the implicit .objc_* symbols for the linker
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// from the ObjC data structures generated by the front end.
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if (v->hasSection() /* && isTargetDarwin */) {
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// special case if this data blob is an ObjC class definition
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if (v->getSection().compare(0, 15, "__OBJC,__class,") == 0) {
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if (GlobalVariable* gv = dyn_cast<GlobalVariable>(v)) {
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addObjCClass(gv);
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}
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||||
}
|
||||
|
||||
// special case if this data blob is an ObjC category definition
|
||||
else if (v->getSection().compare(0, 18, "__OBJC,__category,") == 0) {
|
||||
if (GlobalVariable* gv = dyn_cast<GlobalVariable>(v)) {
|
||||
addObjCCategory(gv);
|
||||
}
|
||||
}
|
||||
|
||||
// special case if this data blob is the list of referenced classes
|
||||
else if (v->getSection().compare(0, 18, "__OBJC,__cls_refs,") == 0) {
|
||||
if (GlobalVariable* gv = dyn_cast<GlobalVariable>(v)) {
|
||||
addObjCClassRef(gv);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// add external symbols referenced by this data.
|
||||
for (unsigned count = 0, total = v->getNumOperands();
|
||||
count != total; ++count) {
|
||||
findExternalRefs(v->getOperand(count), mangler);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void LTOModule::addDefinedSymbol(GlobalValue* def, Mangler &mangler,
|
||||
bool isFunction)
|
||||
{
|
||||
// ignore all llvm.* symbols
|
||||
if (def->getName().startswith("llvm."))
|
||||
return;
|
||||
|
||||
// string is owned by _defines
|
||||
const char* symbolName = ::strdup(mangler.getNameWithPrefix(def).c_str());
|
||||
|
||||
// set alignment part log2() can have rounding errors
|
||||
uint32_t align = def->getAlignment();
|
||||
uint32_t attr = align ? CountTrailingZeros_32(def->getAlignment()) : 0;
|
||||
|
||||
// set permissions part
|
||||
if (isFunction)
|
||||
attr |= LTO_SYMBOL_PERMISSIONS_CODE;
|
||||
else {
|
||||
GlobalVariable* gv = dyn_cast<GlobalVariable>(def);
|
||||
if (gv && gv->isConstant())
|
||||
attr |= LTO_SYMBOL_PERMISSIONS_RODATA;
|
||||
else
|
||||
attr |= LTO_SYMBOL_PERMISSIONS_DATA;
|
||||
}
|
||||
|
||||
// set definition part
|
||||
if (def->hasWeakLinkage() || def->hasLinkOnceLinkage()) {
|
||||
attr |= LTO_SYMBOL_DEFINITION_WEAK;
|
||||
}
|
||||
else if (def->hasCommonLinkage()) {
|
||||
attr |= LTO_SYMBOL_DEFINITION_TENTATIVE;
|
||||
}
|
||||
else {
|
||||
attr |= LTO_SYMBOL_DEFINITION_REGULAR;
|
||||
}
|
||||
|
||||
// set scope part
|
||||
if (def->hasHiddenVisibility())
|
||||
attr |= LTO_SYMBOL_SCOPE_HIDDEN;
|
||||
else if (def->hasProtectedVisibility())
|
||||
attr |= LTO_SYMBOL_SCOPE_PROTECTED;
|
||||
else if (def->hasExternalLinkage() || def->hasWeakLinkage()
|
||||
|| def->hasLinkOnceLinkage() || def->hasCommonLinkage())
|
||||
attr |= LTO_SYMBOL_SCOPE_DEFAULT;
|
||||
else
|
||||
attr |= LTO_SYMBOL_SCOPE_INTERNAL;
|
||||
|
||||
// add to table of symbols
|
||||
// Parse i386/ppc ObjC class list data structure.
|
||||
void LTOModule::addObjCClassRef(GlobalVariable *clgv) {
|
||||
std::string targetclassName;
|
||||
if (objcClassNameFromExpression(clgv->getInitializer(), targetclassName)) {
|
||||
NameAndAttributes info;
|
||||
info.name = symbolName;
|
||||
info.attributes = (lto_symbol_attributes)attr;
|
||||
_symbols.push_back(info);
|
||||
_defines[info.name] = 1;
|
||||
if (_undefines.find(targetclassName.c_str()) == _undefines.end()) {
|
||||
const char *symbolName = ::strdup(targetclassName.c_str());
|
||||
info.name = ::strdup(symbolName);
|
||||
info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
|
||||
// string is owned by _undefines
|
||||
_undefines[info.name] = info;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void LTOModule::addDefinedDataSymbol(GlobalValue *v, Mangler &mangler) {
|
||||
// Add to list of defined symbols.
|
||||
addDefinedSymbol(v, mangler, false);
|
||||
|
||||
// Special case i386/ppc ObjC data structures in magic sections:
|
||||
// The issue is that the old ObjC object format did some strange
|
||||
// contortions to avoid real linker symbols. For instance, the
|
||||
// ObjC class data structure is allocated statically in the executable
|
||||
// that defines that class. That data structures contains a pointer to
|
||||
// its superclass. But instead of just initializing that part of the
|
||||
// struct to the address of its superclass, and letting the static and
|
||||
// dynamic linkers do the rest, the runtime works by having that field
|
||||
// instead point to a C-string that is the name of the superclass.
|
||||
// At runtime the objc initialization updates that pointer and sets
|
||||
// it to point to the actual super class. As far as the linker
|
||||
// knows it is just a pointer to a string. But then someone wanted the
|
||||
// linker to issue errors at build time if the superclass was not found.
|
||||
// So they figured out a way in mach-o object format to use an absolute
|
||||
// symbols (.objc_class_name_Foo = 0) and a floating reference
|
||||
// (.reference .objc_class_name_Bar) to cause the linker into erroring when
|
||||
// a class was missing.
|
||||
// The following synthesizes the implicit .objc_* symbols for the linker
|
||||
// from the ObjC data structures generated by the front end.
|
||||
if (v->hasSection() /* && isTargetDarwin */) {
|
||||
// special case if this data blob is an ObjC class definition
|
||||
if (v->getSection().compare(0, 15, "__OBJC,__class,") == 0) {
|
||||
if (GlobalVariable *gv = dyn_cast<GlobalVariable>(v)) {
|
||||
addObjCClass(gv);
|
||||
}
|
||||
}
|
||||
|
||||
// special case if this data blob is an ObjC category definition
|
||||
else if (v->getSection().compare(0, 18, "__OBJC,__category,") == 0) {
|
||||
if (GlobalVariable *gv = dyn_cast<GlobalVariable>(v)) {
|
||||
addObjCCategory(gv);
|
||||
}
|
||||
}
|
||||
|
||||
// special case if this data blob is the list of referenced classes
|
||||
else if (v->getSection().compare(0, 18, "__OBJC,__cls_refs,") == 0) {
|
||||
if (GlobalVariable *gv = dyn_cast<GlobalVariable>(v)) {
|
||||
addObjCClassRef(gv);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// add external symbols referenced by this data.
|
||||
for (unsigned count = 0, total = v->getNumOperands();
|
||||
count != total; ++count) {
|
||||
findExternalRefs(v->getOperand(count), mangler);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void LTOModule::addDefinedSymbol(GlobalValue *def, Mangler &mangler,
|
||||
bool isFunction) {
|
||||
// ignore all llvm.* symbols
|
||||
if (def->getName().startswith("llvm."))
|
||||
return;
|
||||
|
||||
// string is owned by _defines
|
||||
const char *symbolName = ::strdup(mangler.getNameWithPrefix(def).c_str());
|
||||
|
||||
// set alignment part log2() can have rounding errors
|
||||
uint32_t align = def->getAlignment();
|
||||
uint32_t attr = align ? CountTrailingZeros_32(def->getAlignment()) : 0;
|
||||
|
||||
// set permissions part
|
||||
if (isFunction)
|
||||
attr |= LTO_SYMBOL_PERMISSIONS_CODE;
|
||||
else {
|
||||
GlobalVariable *gv = dyn_cast<GlobalVariable>(def);
|
||||
if (gv && gv->isConstant())
|
||||
attr |= LTO_SYMBOL_PERMISSIONS_RODATA;
|
||||
else
|
||||
attr |= LTO_SYMBOL_PERMISSIONS_DATA;
|
||||
}
|
||||
|
||||
// set definition part
|
||||
if (def->hasWeakLinkage() || def->hasLinkOnceLinkage()) {
|
||||
attr |= LTO_SYMBOL_DEFINITION_WEAK;
|
||||
}
|
||||
else if (def->hasCommonLinkage()) {
|
||||
attr |= LTO_SYMBOL_DEFINITION_TENTATIVE;
|
||||
}
|
||||
else {
|
||||
attr |= LTO_SYMBOL_DEFINITION_REGULAR;
|
||||
}
|
||||
|
||||
// set scope part
|
||||
if (def->hasHiddenVisibility())
|
||||
attr |= LTO_SYMBOL_SCOPE_HIDDEN;
|
||||
else if (def->hasProtectedVisibility())
|
||||
attr |= LTO_SYMBOL_SCOPE_PROTECTED;
|
||||
else if (def->hasExternalLinkage() || def->hasWeakLinkage()
|
||||
|| def->hasLinkOnceLinkage() || def->hasCommonLinkage())
|
||||
attr |= LTO_SYMBOL_SCOPE_DEFAULT;
|
||||
else
|
||||
attr |= LTO_SYMBOL_SCOPE_INTERNAL;
|
||||
|
||||
// add to table of symbols
|
||||
NameAndAttributes info;
|
||||
info.name = symbolName;
|
||||
info.attributes = (lto_symbol_attributes)attr;
|
||||
_symbols.push_back(info);
|
||||
_defines[info.name] = 1;
|
||||
}
|
||||
|
||||
void LTOModule::addAsmGlobalSymbol(const char *name) {
|
||||
// only add new define if not already defined
|
||||
if (_defines.count(name) == 0)
|
||||
return;
|
||||
|
||||
// string is owned by _defines
|
||||
const char *symbolName = ::strdup(name);
|
||||
uint32_t attr = LTO_SYMBOL_DEFINITION_REGULAR;
|
||||
attr |= LTO_SYMBOL_SCOPE_DEFAULT;
|
||||
NameAndAttributes info;
|
||||
info.name = symbolName;
|
||||
info.attributes = (lto_symbol_attributes)attr;
|
||||
_symbols.push_back(info);
|
||||
_defines[info.name] = 1;
|
||||
// only add new define if not already defined
|
||||
if (_defines.count(name) == 0)
|
||||
return;
|
||||
|
||||
// string is owned by _defines
|
||||
const char *symbolName = ::strdup(name);
|
||||
uint32_t attr = LTO_SYMBOL_DEFINITION_REGULAR;
|
||||
attr |= LTO_SYMBOL_SCOPE_DEFAULT;
|
||||
NameAndAttributes info;
|
||||
info.name = symbolName;
|
||||
info.attributes = (lto_symbol_attributes)attr;
|
||||
_symbols.push_back(info);
|
||||
_defines[info.name] = 1;
|
||||
}
|
||||
|
||||
void LTOModule::addPotentialUndefinedSymbol(GlobalValue* decl, Mangler &mangler)
|
||||
{
|
||||
// ignore all llvm.* symbols
|
||||
if (decl->getName().startswith("llvm."))
|
||||
return;
|
||||
void LTOModule::addPotentialUndefinedSymbol(GlobalValue *decl,
|
||||
Mangler &mangler) {
|
||||
// ignore all llvm.* symbols
|
||||
if (decl->getName().startswith("llvm."))
|
||||
return;
|
||||
|
||||
// ignore all aliases
|
||||
if (isa<GlobalAlias>(decl))
|
||||
return;
|
||||
// ignore all aliases
|
||||
if (isa<GlobalAlias>(decl))
|
||||
return;
|
||||
|
||||
std::string name = mangler.getNameWithPrefix(decl);
|
||||
std::string name = mangler.getNameWithPrefix(decl);
|
||||
|
||||
// we already have the symbol
|
||||
if (_undefines.find(name) != _undefines.end())
|
||||
return;
|
||||
// we already have the symbol
|
||||
if (_undefines.find(name) != _undefines.end())
|
||||
return;
|
||||
|
||||
NameAndAttributes info;
|
||||
// string is owned by _undefines
|
||||
info.name = ::strdup(name.c_str());
|
||||
if (decl->hasExternalWeakLinkage())
|
||||
info.attributes = LTO_SYMBOL_DEFINITION_WEAKUNDEF;
|
||||
else
|
||||
info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
|
||||
_undefines[name] = info;
|
||||
NameAndAttributes info;
|
||||
// string is owned by _undefines
|
||||
info.name = ::strdup(name.c_str());
|
||||
if (decl->hasExternalWeakLinkage())
|
||||
info.attributes = LTO_SYMBOL_DEFINITION_WEAKUNDEF;
|
||||
else
|
||||
info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
|
||||
_undefines[name] = info;
|
||||
}
|
||||
|
||||
|
||||
|
||||
// Find external symbols referenced by VALUE. This is a recursive function.
|
||||
void LTOModule::findExternalRefs(Value* value, Mangler &mangler) {
|
||||
void LTOModule::findExternalRefs(Value *value, Mangler &mangler) {
|
||||
if (GlobalValue *gv = dyn_cast<GlobalValue>(value)) {
|
||||
if (!gv->hasExternalLinkage())
|
||||
addPotentialUndefinedSymbol(gv, mangler);
|
||||
// If this is a variable definition, do not recursively process
|
||||
// initializer. It might contain a reference to this variable
|
||||
// and cause an infinite loop. The initializer will be
|
||||
// processed in addDefinedDataSymbol().
|
||||
return;
|
||||
}
|
||||
|
||||
if (GlobalValue* gv = dyn_cast<GlobalValue>(value)) {
|
||||
if (!gv->hasExternalLinkage())
|
||||
addPotentialUndefinedSymbol(gv, mangler);
|
||||
// If this is a variable definition, do not recursively process
|
||||
// initializer. It might contain a reference to this variable
|
||||
// and cause an infinite loop. The initializer will be
|
||||
// processed in addDefinedDataSymbol().
|
||||
return;
|
||||
// GlobalValue, even with InternalLinkage type, may have operands with
|
||||
// ExternalLinkage type. Do not ignore these operands.
|
||||
if (Constant *c = dyn_cast<Constant>(value)) {
|
||||
// Handle ConstantExpr, ConstantStruct, ConstantArry etc.
|
||||
for (unsigned i = 0, e = c->getNumOperands(); i != e; ++i)
|
||||
findExternalRefs(c->getOperand(i), mangler);
|
||||
}
|
||||
}
|
||||
|
||||
void LTOModule::lazyParseSymbols() {
|
||||
if (!_symbolsParsed) {
|
||||
_symbolsParsed = true;
|
||||
|
||||
// Use mangler to add GlobalPrefix to names to match linker names.
|
||||
MCContext Context(*_target->getMCAsmInfo());
|
||||
Mangler mangler(Context, *_target->getTargetData());
|
||||
|
||||
// add functions
|
||||
for (Module::iterator f = _module->begin(); f != _module->end(); ++f) {
|
||||
if (f->isDeclaration())
|
||||
addPotentialUndefinedSymbol(f, mangler);
|
||||
else
|
||||
addDefinedFunctionSymbol(f, mangler);
|
||||
}
|
||||
|
||||
// GlobalValue, even with InternalLinkage type, may have operands with
|
||||
// ExternalLinkage type. Do not ignore these operands.
|
||||
if (Constant* c = dyn_cast<Constant>(value)) {
|
||||
// Handle ConstantExpr, ConstantStruct, ConstantArry etc.
|
||||
for (unsigned i = 0, e = c->getNumOperands(); i != e; ++i)
|
||||
findExternalRefs(c->getOperand(i), mangler);
|
||||
// add data
|
||||
for (Module::global_iterator v = _module->global_begin(),
|
||||
e = _module->global_end(); v != e; ++v) {
|
||||
if (v->isDeclaration())
|
||||
addPotentialUndefinedSymbol(v, mangler);
|
||||
else
|
||||
addDefinedDataSymbol(v, mangler);
|
||||
}
|
||||
}
|
||||
|
||||
void LTOModule::lazyParseSymbols()
|
||||
{
|
||||
if (!_symbolsParsed) {
|
||||
_symbolsParsed = true;
|
||||
|
||||
// Use mangler to add GlobalPrefix to names to match linker names.
|
||||
MCContext Context(*_target->getMCAsmInfo());
|
||||
Mangler mangler(Context, *_target->getTargetData());
|
||||
// add asm globals
|
||||
const std::string &inlineAsm = _module->getModuleInlineAsm();
|
||||
const std::string glbl = ".globl";
|
||||
std::string asmSymbolName;
|
||||
std::string::size_type pos = inlineAsm.find(glbl, 0);
|
||||
while (pos != std::string::npos) {
|
||||
// eat .globl
|
||||
pos = pos + 6;
|
||||
|
||||
// add functions
|
||||
for (Module::iterator f = _module->begin(); f != _module->end(); ++f) {
|
||||
if (f->isDeclaration())
|
||||
addPotentialUndefinedSymbol(f, mangler);
|
||||
else
|
||||
addDefinedFunctionSymbol(f, mangler);
|
||||
}
|
||||
|
||||
// add data
|
||||
for (Module::global_iterator v = _module->global_begin(),
|
||||
e = _module->global_end(); v != e; ++v) {
|
||||
if (v->isDeclaration())
|
||||
addPotentialUndefinedSymbol(v, mangler);
|
||||
else
|
||||
addDefinedDataSymbol(v, mangler);
|
||||
}
|
||||
// skip white space between .globl and symbol name
|
||||
std::string::size_type pbegin = inlineAsm.find_first_not_of(' ', pos);
|
||||
if (pbegin == std::string::npos)
|
||||
break;
|
||||
|
||||
// add asm globals
|
||||
const std::string &inlineAsm = _module->getModuleInlineAsm();
|
||||
const std::string glbl = ".globl";
|
||||
std::string asmSymbolName;
|
||||
std::string::size_type pos = inlineAsm.find(glbl, 0);
|
||||
while (pos != std::string::npos) {
|
||||
// eat .globl
|
||||
pos = pos + 6;
|
||||
// find end-of-line
|
||||
std::string::size_type pend = inlineAsm.find_first_of('\n', pbegin);
|
||||
if (pend == std::string::npos)
|
||||
break;
|
||||
|
||||
// skip white space between .globl and symbol name
|
||||
std::string::size_type pbegin = inlineAsm.find_first_not_of(' ', pos);
|
||||
if (pbegin == std::string::npos)
|
||||
break;
|
||||
asmSymbolName.assign(inlineAsm, pbegin, pend - pbegin);
|
||||
addAsmGlobalSymbol(asmSymbolName.c_str());
|
||||
|
||||
// find end-of-line
|
||||
std::string::size_type pend = inlineAsm.find_first_of('\n', pbegin);
|
||||
if (pend == std::string::npos)
|
||||
break;
|
||||
// search next .globl
|
||||
pos = inlineAsm.find(glbl, pend);
|
||||
}
|
||||
|
||||
asmSymbolName.assign(inlineAsm, pbegin, pend - pbegin);
|
||||
addAsmGlobalSymbol(asmSymbolName.c_str());
|
||||
|
||||
// search next .globl
|
||||
pos = inlineAsm.find(glbl, pend);
|
||||
}
|
||||
|
||||
// make symbols for all undefines
|
||||
for (StringMap<NameAndAttributes>::iterator it=_undefines.begin();
|
||||
it != _undefines.end(); ++it) {
|
||||
// if this symbol also has a definition, then don't make an undefine
|
||||
// because it is a tentative definition
|
||||
if (_defines.count(it->getKey()) == 0) {
|
||||
NameAndAttributes info = it->getValue();
|
||||
_symbols.push_back(info);
|
||||
}
|
||||
}
|
||||
}
|
||||
// make symbols for all undefines
|
||||
for (StringMap<NameAndAttributes>::iterator it=_undefines.begin();
|
||||
it != _undefines.end(); ++it) {
|
||||
// if this symbol also has a definition, then don't make an undefine
|
||||
// because it is a tentative definition
|
||||
if (_defines.count(it->getKey()) == 0) {
|
||||
NameAndAttributes info = it->getValue();
|
||||
_symbols.push_back(info);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
uint32_t LTOModule::getSymbolCount()
|
||||
{
|
||||
lazyParseSymbols();
|
||||
return _symbols.size();
|
||||
uint32_t LTOModule::getSymbolCount() {
|
||||
lazyParseSymbols();
|
||||
return _symbols.size();
|
||||
}
|
||||
|
||||
|
||||
lto_symbol_attributes LTOModule::getSymbolAttributes(uint32_t index)
|
||||
{
|
||||
lazyParseSymbols();
|
||||
if (index < _symbols.size())
|
||||
return _symbols[index].attributes;
|
||||
else
|
||||
return lto_symbol_attributes(0);
|
||||
lto_symbol_attributes LTOModule::getSymbolAttributes(uint32_t index) {
|
||||
lazyParseSymbols();
|
||||
if (index < _symbols.size())
|
||||
return _symbols[index].attributes;
|
||||
else
|
||||
return lto_symbol_attributes(0);
|
||||
}
|
||||
|
||||
const char* LTOModule::getSymbolName(uint32_t index)
|
||||
{
|
||||
lazyParseSymbols();
|
||||
if (index < _symbols.size())
|
||||
return _symbols[index].name;
|
||||
else
|
||||
return NULL;
|
||||
const char *LTOModule::getSymbolName(uint32_t index) {
|
||||
lazyParseSymbols();
|
||||
if (index < _symbols.size())
|
||||
return _symbols[index].name;
|
||||
else
|
||||
return NULL;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user