#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/Assembly/Parser.h"
#include "llvm/BasicBlock.h"
+#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/Constant.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
#include "llvm/ModuleProvider.h"
#include "llvm/Support/IRBuilder.h"
+#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/TypeBuilder.h"
#include "llvm/Target/TargetSelect.h"
return Result;
}
+#if 0
class RecordingJITMemoryManager : public JITMemoryManager {
const OwningPtr<JITMemoryManager> Base;
public:
RecordingJITMemoryManager()
: Base(JITMemoryManager::CreateDefaultMemManager()) {
+ stubsAllocated = 0;
}
virtual void setMemoryWritable() { Base->setMemoryWritable(); }
virtual void setPoisonMemory(bool poison) { Base->setPoisonMemory(poison); }
virtual void AllocateGOT() { Base->AllocateGOT(); }
virtual uint8_t *getGOTBase() const { return Base->getGOTBase(); }
- virtual void SetDlsymTable(void *ptr) { Base->SetDlsymTable(ptr); }
- virtual void *getDlsymTable() const { return Base->getDlsymTable(); }
struct StartFunctionBodyCall {
StartFunctionBodyCall(uint8_t *Result, const Function *F,
uintptr_t ActualSize, uintptr_t ActualSizeResult)
StartFunctionBodyCall(Result, F, InitialActualSize, ActualSize));
return Result;
}
+ int stubsAllocated;
virtual uint8_t *allocateStub(const GlobalValue* F, unsigned StubSize,
unsigned Alignment) {
+ stubsAllocated++;
return Base->allocateStub(F, StubSize, Alignment);
}
struct EndFunctionBodyCall {
return Base->endExceptionTable(F, TableStart, TableEnd, FrameRegister);
}
};
+#endif
+
+bool LoadAssemblyInto(Module *M, const char *assembly) {
+ SMDiagnostic Error;
+ bool success =
+ NULL != ParseAssemblyString(assembly, M, Error, M->getContext());
+ std::string errMsg;
+ raw_string_ostream os(errMsg);
+ Error.Print("", os);
+ EXPECT_TRUE(success) << os.str();
+ return success;
+}
class JITTest : public testing::Test {
protected:
virtual void SetUp() {
M = new Module("<main>", Context);
MP = new ExistingModuleProvider(M);
+#if 0
RJMM = new RecordingJITMemoryManager;
+ RJMM->setPoisonMemory(true);
+#endif
std::string Error;
TheJIT.reset(EngineBuilder(MP).setEngineKind(EngineKind::JIT)
+#if 0
.setJITMemoryManager(RJMM)
+#endif
.setErrorStr(&Error).create());
ASSERT_TRUE(TheJIT.get() != NULL) << Error;
}
void LoadAssembly(const char *assembly) {
- SMDiagnostic Error;
- bool success = NULL != ParseAssemblyString(assembly, M, Error, Context);
- std::string errMsg;
- raw_string_ostream os(errMsg);
- Error.Print("", os);
- ASSERT_TRUE(success) << os.str();
+ LoadAssemblyInto(M, assembly);
}
LLVMContext Context;
Module *M; // Owned by MP.
ModuleProvider *MP; // Owned by ExecutionEngine.
+#if 0
RecordingJITMemoryManager *RJMM;
+#endif
OwningPtr<ExecutionEngine> TheJIT;
};
ConstantInt::get(TypeBuilder<int, false>::get(Context), 7));
Builder.CreateRet(result);
- TheJIT->EnableDlsymStubs(false);
TheJIT->DisableLazyCompilation(true);
int (*TestFunctionPtr)() = reinterpret_cast<int(*)()>(
(intptr_t)TheJIT->getPointerToFunction(TestFunction));
EXPECT_EQ(8, TestFunctionPtr());
}
-#if !defined(__arm__) && !defined(__powerpc__) && !defined(__ppc__)
// Test a function C which calls A and B which call each other.
TEST_F(JITTest, NonLazyCompilationStillNeedsStubs) {
TheJIT->DisableLazyCompilation(true);
EXPECT_EQ(Func2->getNumUses(), 0u);
Func2->eraseFromParent();
}
-#endif
TEST_F(JITTest, ModuleDeletion) {
TheJIT->DisableLazyCompilation(false);
TheJIT->getPointerToFunction(func);
TheJIT->deleteModuleProvider(MP);
+#if 0
SmallPtrSet<const void*, 2> FunctionsDeallocated;
for (unsigned i = 0, e = RJMM->deallocateFunctionBodyCalls.size();
i != e; ++i) {
RJMM->deallocateFunctionBodyCalls.size());
SmallPtrSet<const void*, 2> ExceptionTablesDeallocated;
+ unsigned NumTablesDeallocated = 0;
for (unsigned i = 0, e = RJMM->deallocateExceptionTableCalls.size();
i != e; ++i) {
ExceptionTablesDeallocated.insert(
RJMM->deallocateExceptionTableCalls[i].ET);
+ if (RJMM->deallocateExceptionTableCalls[i].ET != NULL) {
+ // If JITEmitDebugInfo is off, we'll "deallocate" NULL, which doesn't
+ // appear in startExceptionTableCalls.
+ NumTablesDeallocated++;
+ }
}
for (unsigned i = 0, e = RJMM->startExceptionTableCalls.size(); i != e; ++i) {
EXPECT_TRUE(ExceptionTablesDeallocated.count(
<< RJMM->startExceptionTableCalls[i].F_dump;
}
EXPECT_EQ(RJMM->startExceptionTableCalls.size(),
- RJMM->deallocateExceptionTableCalls.size());
+ NumTablesDeallocated);
+#endif
+}
+
+// ARM and PPC still emit stubs for calls since the target may be too far away
+// to call directly. This #if can probably be removed when
+// http://llvm.org/PR5201 is fixed.
+#if !defined(__arm__) && !defined(__powerpc__) && !defined(__ppc__)
+typedef int (*FooPtr) ();
+
+TEST_F(JITTest, NoStubs) {
+ LoadAssembly("define void @bar() {"
+ "entry: "
+ "ret void"
+ "}"
+ " "
+ "define i32 @foo() {"
+ "entry:"
+ "call void @bar()"
+ "ret i32 undef"
+ "}"
+ " "
+ "define i32 @main() {"
+ "entry:"
+ "%0 = call i32 @foo()"
+ "call void @bar()"
+ "ret i32 undef"
+ "}");
+ Function *foo = M->getFunction("foo");
+ uintptr_t tmp = (uintptr_t)(TheJIT->getPointerToFunction(foo));
+ FooPtr ptr = (FooPtr)(tmp);
+
+ (ptr)();
+
+ // We should now allocate no more stubs, we have the code to foo
+ // and the existing stub for bar.
+#if 0
+ int stubsBefore = RJMM->stubsAllocated;
+#endif
+ Function *func = M->getFunction("main");
+ TheJIT->getPointerToFunction(func);
+
+ Function *bar = M->getFunction("bar");
+ TheJIT->getPointerToFunction(bar);
+
+#if 0
+ ASSERT_EQ(stubsBefore, RJMM->stubsAllocated);
+#endif
+}
+#endif // !ARM && !PPC
+
+TEST_F(JITTest, FunctionPointersOutliveTheirCreator) {
+ TheJIT->DisableLazyCompilation(true);
+ LoadAssembly("define i8()* @get_foo_addr() { "
+ " ret i8()* @foo "
+ "} "
+ " "
+ "define i8 @foo() { "
+ " ret i8 42 "
+ "} ");
+ Function *F_get_foo_addr = M->getFunction("get_foo_addr");
+
+ typedef char(*fooT)();
+ fooT (*get_foo_addr)() = reinterpret_cast<fooT(*)()>(
+ (intptr_t)TheJIT->getPointerToFunction(F_get_foo_addr));
+ fooT foo_addr = get_foo_addr();
+
+ // Now free get_foo_addr. This should not free the machine code for foo or
+ // any call stub returned as foo's canonical address.
+ TheJIT->freeMachineCodeForFunction(F_get_foo_addr);
+
+ // Check by calling the reported address of foo.
+ EXPECT_EQ(42, foo_addr());
+
+ // The reported address should also be the same as the result of a subsequent
+ // getPointerToFunction(foo).
+#if 0
+ // Fails until PR5126 is fixed:
+ Function *F_foo = M->getFunction("foo");
+ fooT foo = reinterpret_cast<fooT>(
+ (intptr_t)TheJIT->getPointerToFunction(F_foo));
+ EXPECT_EQ((intptr_t)foo, (intptr_t)foo_addr);
+#endif
+}
+
+// ARM doesn't have an implementation of replaceMachineCodeForFunction(), so
+// recompileAndRelinkFunction doesn't work.
+#if !defined(__arm__)
+TEST_F(JITTest, FunctionIsRecompiledAndRelinked) {
+ Function *F = Function::Create(TypeBuilder<int(void), false>::get(Context),
+ GlobalValue::ExternalLinkage, "test", M);
+ BasicBlock *Entry = BasicBlock::Create(Context, "entry", F);
+ IRBuilder<> Builder(Entry);
+ Value *Val = ConstantInt::get(TypeBuilder<int, false>::get(Context), 1);
+ Builder.CreateRet(Val);
+
+ TheJIT->DisableLazyCompilation(true);
+ // Compile the function once, and make sure it works.
+ int (*OrigFPtr)() = reinterpret_cast<int(*)()>(
+ (intptr_t)TheJIT->recompileAndRelinkFunction(F));
+ EXPECT_EQ(1, OrigFPtr());
+
+ // Now change the function to return a different value.
+ Entry->eraseFromParent();
+ BasicBlock *NewEntry = BasicBlock::Create(Context, "new_entry", F);
+ Builder.SetInsertPoint(NewEntry);
+ Val = ConstantInt::get(TypeBuilder<int, false>::get(Context), 2);
+ Builder.CreateRet(Val);
+ // Recompile it, which should produce a new function pointer _and_ update the
+ // old one.
+ int (*NewFPtr)() = reinterpret_cast<int(*)()>(
+ (intptr_t)TheJIT->recompileAndRelinkFunction(F));
+
+ EXPECT_EQ(2, NewFPtr())
+ << "The new pointer should call the new version of the function";
+ EXPECT_EQ(2, OrigFPtr())
+ << "The old pointer's target should now jump to the new version";
+}
+#endif // !defined(__arm__)
+
+} // anonymous namespace
+// This variable is intentionally defined differently in the statically-compiled
+// program from the IR input to the JIT to assert that the JIT doesn't use its
+// definition.
+extern "C" int32_t JITTest_AvailableExternallyGlobal;
+int32_t JITTest_AvailableExternallyGlobal = 42;
+namespace {
+
+TEST_F(JITTest, AvailableExternallyGlobalIsntEmitted) {
+ TheJIT->DisableLazyCompilation(true);
+ LoadAssembly("@JITTest_AvailableExternallyGlobal = "
+ " available_externally global i32 7 "
+ " "
+ "define i32 @loader() { "
+ " %result = load i32* @JITTest_AvailableExternallyGlobal "
+ " ret i32 %result "
+ "} ");
+ Function *loaderIR = M->getFunction("loader");
+
+ int32_t (*loader)() = reinterpret_cast<int32_t(*)()>(
+ (intptr_t)TheJIT->getPointerToFunction(loaderIR));
+ EXPECT_EQ(42, loader()) << "func should return 42 from the external global,"
+ << " not 7 from the IR version.";
+}
+
+} // anonymous namespace
+// This function is intentionally defined differently in the statically-compiled
+// program from the IR input to the JIT to assert that the JIT doesn't use its
+// definition.
+extern "C" int32_t JITTest_AvailableExternallyFunction() {
+ return 42;
+}
+namespace {
+
+TEST_F(JITTest, AvailableExternallyFunctionIsntCompiled) {
+ TheJIT->DisableLazyCompilation(true);
+ LoadAssembly("define available_externally i32 "
+ " @JITTest_AvailableExternallyFunction() { "
+ " ret i32 7 "
+ "} "
+ " "
+ "define i32 @func() { "
+ " %result = tail call i32 "
+ " @JITTest_AvailableExternallyFunction() "
+ " ret i32 %result "
+ "} ");
+ Function *funcIR = M->getFunction("func");
+
+ int32_t (*func)() = reinterpret_cast<int32_t(*)()>(
+ (intptr_t)TheJIT->getPointerToFunction(funcIR));
+ EXPECT_EQ(42, func()) << "func should return 42 from the static version,"
+ << " not 7 from the IR version.";
+}
+
+// Converts the LLVM assembly to bitcode and returns it in a std::string. An
+// empty string indicates an error.
+std::string AssembleToBitcode(LLVMContext &Context, const char *Assembly) {
+ Module TempModule("TempModule", Context);
+ if (!LoadAssemblyInto(&TempModule, Assembly)) {
+ return "";
+ }
+
+ std::string Result;
+ raw_string_ostream OS(Result);
+ WriteBitcodeToFile(&TempModule, OS);
+ OS.flush();
+ return Result;
+}
+
+// Returns a newly-created ExecutionEngine that reads the bitcode in 'Bitcode'
+// lazily. The associated ModuleProvider (owned by the ExecutionEngine) is
+// returned in MP. Both will be NULL on an error. Bitcode must live at least
+// as long as the ExecutionEngine.
+ExecutionEngine *getJITFromBitcode(
+ LLVMContext &Context, const std::string &Bitcode, ModuleProvider *&MP) {
+ // c_str() is null-terminated like MemoryBuffer::getMemBuffer requires.
+ MemoryBuffer *BitcodeBuffer =
+ MemoryBuffer::getMemBuffer(Bitcode.c_str(),
+ Bitcode.c_str() + Bitcode.size(),
+ "Bitcode for test");
+ std::string errMsg;
+ MP = getBitcodeModuleProvider(BitcodeBuffer, Context, &errMsg);
+ if (MP == NULL) {
+ ADD_FAILURE() << errMsg;
+ delete BitcodeBuffer;
+ return NULL;
+ }
+ ExecutionEngine *TheJIT = EngineBuilder(MP)
+ .setEngineKind(EngineKind::JIT)
+ .setErrorStr(&errMsg)
+ .create();
+ if (TheJIT == NULL) {
+ ADD_FAILURE() << errMsg;
+ delete MP;
+ MP = NULL;
+ return NULL;
+ }
+ return TheJIT;
+}
+
+TEST(LazyLoadedJITTest, EagerCompiledRecursionThroughGhost) {
+ LLVMContext Context;
+ const std::string Bitcode =
+ AssembleToBitcode(Context,
+ "define i32 @recur1(i32 %a) { "
+ " %zero = icmp eq i32 %a, 0 "
+ " br i1 %zero, label %done, label %notdone "
+ "done: "
+ " ret i32 3 "
+ "notdone: "
+ " %am1 = sub i32 %a, 1 "
+ " %result = call i32 @recur2(i32 %am1) "
+ " ret i32 %result "
+ "} "
+ " "
+ "define i32 @recur2(i32 %b) { "
+ " %result = call i32 @recur1(i32 %b) "
+ " ret i32 %result "
+ "} ");
+ ASSERT_FALSE(Bitcode.empty()) << "Assembling failed";
+ ModuleProvider *MP;
+ OwningPtr<ExecutionEngine> TheJIT(getJITFromBitcode(Context, Bitcode, MP));
+ ASSERT_TRUE(TheJIT.get()) << "Failed to create JIT.";
+ TheJIT->DisableLazyCompilation(true);
+
+ Module *M = MP->getModule();
+ Function *recur1IR = M->getFunction("recur1");
+ Function *recur2IR = M->getFunction("recur2");
+ EXPECT_TRUE(recur1IR->hasNotBeenReadFromBitcode());
+ EXPECT_TRUE(recur2IR->hasNotBeenReadFromBitcode());
+
+ int32_t (*recur1)(int32_t) = reinterpret_cast<int32_t(*)(int32_t)>(
+ (intptr_t)TheJIT->getPointerToFunction(recur1IR));
+ EXPECT_EQ(3, recur1(4));
}
// This code is copied from JITEventListenerTest, but it only runs once for all
projects / oota-llvm.git / blobdiff