//===----------------------------------------------------------------------===//
#include "llvm/ADT/SmallString.h"
-#include "llvm/Analysis/Verifier.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/AsmParser/Parser.h"
+#include "llvm/Bitcode/BitstreamReader.h"
#include "llvm/Bitcode/BitstreamWriter.h"
#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
-#include "llvm/PassManager.h"
+#include "llvm/IR/Verifier.h"
+#include "llvm/Support/DataStream.h"
+#include "llvm/Support/Debug.h"
#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/StreamingMemoryObject.h"
#include "gtest/gtest.h"
-namespace llvm {
-namespace {
-
-static Module *makeLLVMModule() {
- Module* Mod = new Module("test-mem", getGlobalContext());
+using namespace llvm;
- FunctionType* FuncTy =
- FunctionType::get(Type::getVoidTy(Mod->getContext()), false);
- Function* Func = Function::Create(FuncTy,GlobalValue::ExternalLinkage,
- "func", Mod);
+namespace {
- BasicBlock* Entry = BasicBlock::Create(Mod->getContext(), "entry", Func);
- new UnreachableInst(Mod->getContext(), Entry);
+std::unique_ptr<Module> parseAssembly(const char *Assembly) {
+ SMDiagnostic Error;
+ std::unique_ptr<Module> M =
+ parseAssemblyString(Assembly, Error, getGlobalContext());
- BasicBlock* BB = BasicBlock::Create(Mod->getContext(), "bb", Func);
- new UnreachableInst(Mod->getContext(), BB);
+ std::string ErrMsg;
+ raw_string_ostream OS(ErrMsg);
+ Error.print("", OS);
- PointerType* Int8Ptr = Type::getInt8PtrTy(Mod->getContext());
- new GlobalVariable(*Mod, Int8Ptr, /*isConstant=*/true,
- GlobalValue::ExternalLinkage,
- BlockAddress::get(BB), "table");
+ // A failure here means that the test itself is buggy.
+ if (!M)
+ report_fatal_error(OS.str().c_str());
- return Mod;
+ return M;
}
-static void writeModuleToBuffer(SmallVectorImpl<char> &Buffer) {
- OwningPtr<Module> Mod(makeLLVMModule());
+static void writeModuleToBuffer(std::unique_ptr<Module> Mod,
+ SmallVectorImpl<char> &Buffer) {
raw_svector_ostream OS(Buffer);
WriteBitcodeToFile(Mod.get(), OS);
}
+static std::unique_ptr<Module> getLazyModuleFromAssembly(LLVMContext &Context,
+ SmallString<1024> &Mem,
+ const char *Assembly) {
+ writeModuleToBuffer(parseAssembly(Assembly), Mem);
+ std::unique_ptr<MemoryBuffer> Buffer =
+ MemoryBuffer::getMemBuffer(Mem.str(), "test", false);
+ ErrorOr<std::unique_ptr<Module>> ModuleOrErr =
+ getLazyBitcodeModule(std::move(Buffer), Context);
+ return std::move(ModuleOrErr.get());
+}
+
+class BufferDataStreamer : public DataStreamer {
+ std::unique_ptr<MemoryBuffer> Buffer;
+ unsigned Pos = 0;
+ size_t GetBytes(unsigned char *Out, size_t Len) override {
+ StringRef Buf = Buffer->getBuffer();
+ size_t Left = Buf.size() - Pos;
+ Len = std::min(Left, Len);
+ memcpy(Out, Buffer->getBuffer().substr(Pos).data(), Len);
+ Pos += Len;
+ return Len;
+ }
+
+public:
+ BufferDataStreamer(std::unique_ptr<MemoryBuffer> Buffer)
+ : Buffer(std::move(Buffer)) {}
+};
+
+static std::unique_ptr<Module>
+getStreamedModuleFromAssembly(LLVMContext &Context, SmallString<1024> &Mem,
+ const char *Assembly) {
+ writeModuleToBuffer(parseAssembly(Assembly), Mem);
+ std::unique_ptr<MemoryBuffer> Buffer =
+ MemoryBuffer::getMemBuffer(Mem.str(), "test", false);
+ auto Streamer = llvm::make_unique<BufferDataStreamer>(std::move(Buffer));
+ ErrorOr<std::unique_ptr<Module>> ModuleOrErr =
+ getStreamedBitcodeModule("test", std::move(Streamer), Context);
+ return std::move(ModuleOrErr.get());
+}
+
+// Checks if we correctly detect eof if we try to read N bits when there are not
+// enough bits left on the input stream to read N bits, and we are using a data
+// streamer. In particular, it checks if we properly set the object size when
+// the eof is reached under such conditions.
+TEST(BitReaderTest, TestForEofAfterReadFailureOnDataStreamer) {
+ // Note: Because StreamingMemoryObject does a call to method GetBytes in it's
+ // constructor, using internal constant kChunkSize, we must fill the input
+ // with more characters than that amount.
+ static size_t InputSize = StreamingMemoryObject::kChunkSize + 5;
+ char *Text = new char[InputSize];
+ std::memset(Text, 'a', InputSize);
+ Text[InputSize - 1] = '\0';
+ StringRef Input(Text);
+
+ // Build bitsteam reader using data streamer.
+ auto MemoryBuf = MemoryBuffer::getMemBuffer(Input);
+ std::unique_ptr<DataStreamer> Streamer(
+ new BufferDataStreamer(std::move(MemoryBuf)));
+ auto OwnedBytes =
+ llvm::make_unique<StreamingMemoryObject>(std::move(Streamer));
+ auto Reader = llvm::make_unique<BitstreamReader>(std::move(OwnedBytes));
+ BitstreamCursor Cursor;
+ Cursor.init(Reader.get());
+
+ // Jump to two bytes before end of stream.
+ Cursor.JumpToBit((InputSize - 4) * CHAR_BIT);
+ // Try to read 4 bytes when only 2 are present, resulting in error value 0.
+ const size_t ReadErrorValue = 0;
+ EXPECT_EQ(ReadErrorValue, Cursor.Read(32));
+ // Should be at eof now.
+ EXPECT_TRUE(Cursor.AtEndOfStream());
+
+ delete[] Text;
+}
+
+TEST(BitReaderTest, MateralizeForwardRefWithStream) {
+ SmallString<1024> Mem;
+
+ LLVMContext Context;
+ std::unique_ptr<Module> M = getStreamedModuleFromAssembly(
+ Context, Mem, "@table = constant i8* blockaddress(@func, %bb)\n"
+ "define void @func() {\n"
+ " unreachable\n"
+ "bb:\n"
+ " unreachable\n"
+ "}\n");
+ EXPECT_FALSE(M->getFunction("func")->empty());
+}
+
+// Tests that lazy evaluation can parse functions out of order.
+TEST(BitReaderTest, MaterializeFunctionsOutOfOrder) {
+ SmallString<1024> Mem;
+ LLVMContext Context;
+ std::unique_ptr<Module> M = getLazyModuleFromAssembly(
+ Context, Mem, "define void @f() {\n"
+ " unreachable\n"
+ "}\n"
+ "define void @g() {\n"
+ " unreachable\n"
+ "}\n"
+ "define void @h() {\n"
+ " unreachable\n"
+ "}\n"
+ "define void @j() {\n"
+ " unreachable\n"
+ "}\n");
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+ Function *F = M->getFunction("f");
+ Function *G = M->getFunction("g");
+ Function *H = M->getFunction("h");
+ Function *J = M->getFunction("j");
+
+ // Initially all functions are not materialized (no basic blocks).
+ EXPECT_TRUE(F->empty());
+ EXPECT_TRUE(G->empty());
+ EXPECT_TRUE(H->empty());
+ EXPECT_TRUE(J->empty());
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+ // Materialize h.
+ H->materialize();
+ EXPECT_TRUE(F->empty());
+ EXPECT_TRUE(G->empty());
+ EXPECT_FALSE(H->empty());
+ EXPECT_TRUE(J->empty());
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+ // Materialize g.
+ G->materialize();
+ EXPECT_TRUE(F->empty());
+ EXPECT_FALSE(G->empty());
+ EXPECT_FALSE(H->empty());
+ EXPECT_TRUE(J->empty());
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+ // Materialize j.
+ J->materialize();
+ EXPECT_TRUE(F->empty());
+ EXPECT_FALSE(G->empty());
+ EXPECT_FALSE(H->empty());
+ EXPECT_FALSE(J->empty());
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+ // Materialize f.
+ F->materialize();
+ EXPECT_FALSE(F->empty());
+ EXPECT_FALSE(G->empty());
+ EXPECT_FALSE(H->empty());
+ EXPECT_FALSE(J->empty());
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
+}
+
TEST(BitReaderTest, MaterializeFunctionsForBlockAddr) { // PR11677
SmallString<1024> Mem;
- writeModuleToBuffer(Mem);
- MemoryBuffer *Buffer = MemoryBuffer::getMemBuffer(Mem.str(), "test", false);
- std::string errMsg;
- OwningPtr<Module> m(getLazyBitcodeModule(Buffer, getGlobalContext(), &errMsg));
- PassManager passes;
- passes.add(createVerifierPass());
- passes.run(*m);
+
+ LLVMContext Context;
+ std::unique_ptr<Module> M = getLazyModuleFromAssembly(
+ Context, Mem, "@table = constant i8* blockaddress(@func, %bb)\n"
+ "define void @func() {\n"
+ " unreachable\n"
+ "bb:\n"
+ " unreachable\n"
+ "}\n");
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
}
+TEST(BitReaderTest, MaterializeFunctionsForBlockAddrInFunctionBefore) {
+ SmallString<1024> Mem;
+
+ LLVMContext Context;
+ std::unique_ptr<Module> M = getLazyModuleFromAssembly(
+ Context, Mem, "define i8* @before() {\n"
+ " ret i8* blockaddress(@func, %bb)\n"
+ "}\n"
+ "define void @other() {\n"
+ " unreachable\n"
+ "}\n"
+ "define void @func() {\n"
+ " unreachable\n"
+ "bb:\n"
+ " unreachable\n"
+ "}\n");
+ EXPECT_TRUE(M->getFunction("before")->empty());
+ EXPECT_TRUE(M->getFunction("func")->empty());
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+ // Materialize @before, pulling in @func.
+ EXPECT_FALSE(M->getFunction("before")->materialize());
+ EXPECT_FALSE(M->getFunction("func")->empty());
+ EXPECT_TRUE(M->getFunction("other")->empty());
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
}
+
+TEST(BitReaderTest, MaterializeFunctionsForBlockAddrInFunctionAfter) {
+ SmallString<1024> Mem;
+
+ LLVMContext Context;
+ std::unique_ptr<Module> M = getLazyModuleFromAssembly(
+ Context, Mem, "define void @func() {\n"
+ " unreachable\n"
+ "bb:\n"
+ " unreachable\n"
+ "}\n"
+ "define void @other() {\n"
+ " unreachable\n"
+ "}\n"
+ "define i8* @after() {\n"
+ " ret i8* blockaddress(@func, %bb)\n"
+ "}\n");
+ EXPECT_TRUE(M->getFunction("after")->empty());
+ EXPECT_TRUE(M->getFunction("func")->empty());
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+ // Materialize @after, pulling in @func.
+ EXPECT_FALSE(M->getFunction("after")->materialize());
+ EXPECT_FALSE(M->getFunction("func")->empty());
+ EXPECT_TRUE(M->getFunction("other")->empty());
+ EXPECT_FALSE(verifyModule(*M, &dbgs()));
}
+
+} // end namespace
projects / oota-llvm.git / blobdiff