//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "jit"
#include "JIT.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Module.h"
+#include "llvm/IR/Operator.h"
#include "llvm/IR/ValueHandle.h"
#include "llvm/IR/ValueMap.h"
#include "llvm/Support/Debug.h"
-#include "llvm/Support/Disassembler.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/Memory.h"
#endif
using namespace llvm;
+#define DEBUG_TYPE "jit"
+
STATISTIC(NumBytes, "Number of bytes of machine code compiled");
STATISTIC(NumRelos, "Number of relocations applied");
STATISTIC(NumRetries, "Number of retries with more memory");
#endif
}
- FunctionToLazyStubMapTy& getFunctionToLazyStubMap(
- const MutexGuard& locked) {
- assert(locked.holds(TheJIT->lock));
+ FunctionToLazyStubMapTy& getFunctionToLazyStubMap() {
return FunctionToLazyStubMap;
}
- GlobalToIndirectSymMapTy& getGlobalToIndirectSymMap(const MutexGuard& lck) {
- assert(lck.holds(TheJIT->lock));
+ GlobalToIndirectSymMapTy& getGlobalToIndirectSymMap() {
return GlobalToIndirectSymMap;
}
std::pair<void *, Function *> LookupFunctionFromCallSite(
- const MutexGuard &locked, void *CallSite) const {
- assert(locked.holds(TheJIT->lock));
-
+ void *CallSite) const {
// The address given to us for the stub may not be exactly right, it
// might be a little bit after the stub. As such, use upper_bound to
// find it.
return *I;
}
- void AddCallSite(const MutexGuard &locked, void *CallSite, Function *F) {
- assert(locked.holds(TheJIT->lock));
-
+ void AddCallSite(void *CallSite, Function *F) {
bool Inserted = CallSiteToFunctionMap.insert(
std::make_pair(CallSite, F)).second;
(void)Inserted;
void *FunctionBody; // Beginning of the function's allocation.
void *Code; // The address the function's code actually starts at.
void *ExceptionTable;
- EmittedCode() : FunctionBody(0), Code(0), ExceptionTable(0) {}
+ EmittedCode() : FunctionBody(nullptr), Code(nullptr),
+ ExceptionTable(nullptr) {}
};
struct EmittedFunctionConfig : public ValueMapConfig<const Function*> {
typedef JITEmitter *ExtraData;
public:
JITEmitter(JIT &jit, JITMemoryManager *JMM, TargetMachine &TM)
- : SizeEstimate(0), Resolver(jit, *this), MMI(0), CurFn(0),
+ : SizeEstimate(0), Resolver(jit, *this), MMI(nullptr), CurFn(nullptr),
EmittedFunctions(this), TheJIT(&jit) {
MemMgr = JMM ? JMM : JITMemoryManager::CreateDefaultMemManager();
if (jit.getJITInfo().needsGOT()) {
MutexGuard locked(TheJIT->lock);
// If we already have a stub for this function, recycle it.
- return state.getFunctionToLazyStubMap(locked).lookup(F);
+ return state.getFunctionToLazyStubMap().lookup(F);
}
/// getFunctionStub - This returns a pointer to a function stub, creating
MutexGuard locked(TheJIT->lock);
// If we already have a lazy stub for this function, recycle it.
- void *&Stub = state.getFunctionToLazyStubMap(locked)[F];
+ void *&Stub = state.getFunctionToLazyStubMap()[F];
if (Stub) return Stub;
// Call the lazy resolver function if we are JIT'ing lazily. Otherwise we
// must resolve the symbol now.
void *Actual = TheJIT->isCompilingLazily()
- ? (void *)(intptr_t)LazyResolverFn : (void *)0;
+ ? (void *)(intptr_t)LazyResolverFn : (void *)nullptr;
// If this is an external declaration, attempt to resolve the address now
// to place in the stub.
// If we resolved the symbol to a null address (eg. a weak external)
// don't emit a stub. Return a null pointer to the application.
- if (!Actual) return 0;
+ if (!Actual) return nullptr;
}
TargetJITInfo::StubLayout SL = TheJIT->getJITInfo().getStubLayout();
// Finally, keep track of the stub-to-Function mapping so that the
// JITCompilerFn knows which function to compile!
- state.AddCallSite(locked, Stub, F);
+ state.AddCallSite(Stub, F);
} else if (!Actual) {
// If we are JIT'ing non-lazily but need to call a function that does not
// exist yet, add it to the JIT's work list so that we can fill in the
MutexGuard locked(TheJIT->lock);
// If we already have a stub for this global variable, recycle it.
- void *&IndirectSym = state.getGlobalToIndirectSymMap(locked)[GV];
+ void *&IndirectSym = state.getGlobalToIndirectSymMap()[GV];
if (IndirectSym) return IndirectSym;
// Otherwise, codegen a new indirect symbol.
if (Stub) return Stub;
TargetJITInfo::StubLayout SL = TheJIT->getJITInfo().getStubLayout();
- JE.startGVStub(0, SL.Size, SL.Alignment);
- Stub = TheJIT->getJITInfo().emitFunctionStub(0, FnAddr, JE);
+ JE.startGVStub(nullptr, SL.Size, SL.Alignment);
+ Stub = TheJIT->getJITInfo().emitFunctionStub(nullptr, FnAddr, JE);
JE.finishGVStub();
DEBUG(dbgs() << "JIT: Stub emitted at [" << Stub
JITResolver *JR = StubToResolverMap->getResolverFromStub(Stub);
assert(JR && "Unable to find the corresponding JITResolver to the call site");
- Function* F = 0;
- void* ActualPtr = 0;
+ Function* F = nullptr;
+ void* ActualPtr = nullptr;
{
// Only lock for getting the Function. The call getPointerToFunction made
// The address given to us for the stub may not be exactly right, it might
// be a little bit after the stub. As such, use upper_bound to find it.
std::pair<void*, Function*> I =
- JR->state.LookupFunctionFromCallSite(locked, Stub);
+ JR->state.LookupFunctionFromCallSite(Stub);
F = I.second;
ActualPtr = I.first;
}
//===----------------------------------------------------------------------===//
// JITEmitter code.
//
+
+static GlobalObject *getSimpleAliasee(Constant *C) {
+ C = C->stripPointerCasts();
+ return dyn_cast<GlobalObject>(C);
+}
+
void *JITEmitter::getPointerToGlobal(GlobalValue *V, void *Reference,
bool MayNeedFarStub) {
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V))
return TheJIT->getOrEmitGlobalVariable(GV);
- if (GlobalAlias *GA = dyn_cast<GlobalAlias>(V))
- return TheJIT->getPointerToGlobal(GA->resolveAliasedGlobal(false));
+ if (GlobalAlias *GA = dyn_cast<GlobalAlias>(V)) {
+ // We can only handle simple cases.
+ if (GlobalValue *GV = getSimpleAliasee(GA->getAliasee()))
+ return TheJIT->getPointerToGlobal(GV);
+ return nullptr;
+ }
// If we have already compiled the function, return a pointer to its body.
Function *F = cast<Function>(V);
const LLVMContext &Context = EmissionDetails.MF->getFunction()->getContext();
- if (DL.getScope(Context) != 0 && PrevDL != DL) {
+ if (DL.getScope(Context) != nullptr && PrevDL != DL) {
JITEvent_EmittedFunctionDetails::LineStart NextLine;
NextLine.Address = getCurrentPCValue();
NextLine.Loc = DL;
// Resolve the relocations to concrete pointers.
for (unsigned i = 0, e = Relocations.size(); i != e; ++i) {
MachineRelocation &MR = Relocations[i];
- void *ResultPtr = 0;
+ void *ResultPtr = nullptr;
if (!MR.letTargetResolve()) {
if (MR.isExternalSymbol()) {
ResultPtr = TheJIT->getPointerToNamedFunction(MR.getExternalSymbol(),
}
}
- CurFn = 0;
+ CurFn = nullptr;
TheJIT->getJITInfo().relocate(BufferBegin, &Relocations[0],
Relocations.size(), MemMgr->getGOTBase());
}
SizeEstimate = 0;
}
- BufferBegin = CurBufferPtr = 0;
+ BufferBegin = CurBufferPtr = nullptr;
NumBytes += FnEnd-FnStart;
// Invalidate the icache if necessary.
MemMgr->setMemoryExecutable();
DEBUG({
- if (sys::hasDisassembler()) {
- dbgs() << "JIT: Disassembled code:\n";
- dbgs() << sys::disassembleBuffer(FnStart, FnEnd-FnStart,
- (uintptr_t)FnStart);
- } else {
dbgs() << "JIT: Binary code:\n";
uint8_t* q = FnStart;
for (int i = 0; q < FnEnd; q += 4, ++i) {
dbgs() << '\n';
}
dbgs()<< '\n';
- }
});
if (MMI)
ConstantPoolBase = allocateSpace(Size, Align);
ConstantPool = MCP;
- if (ConstantPoolBase == 0) return; // Buffer overflow.
+ if (!ConstantPoolBase) return; // Buffer overflow.
DEBUG(dbgs() << "JIT: Emitted constant pool at [" << ConstantPoolBase
<< "] (size: " << Size << ", alignment: " << Align << ")\n");
return;
const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
- if (JT.empty() || JumpTableBase == 0) return;
+ if (JT.empty() || !JumpTableBase) return;
switch (MJTI->getEntryKind()) {
return JE->getJITResolver().getLazyFunctionStub(F);
}
-void JIT::updateFunctionStub(Function *F) {
+void JIT::updateFunctionStubUnlocked(Function *F) {
// Get the empty stub we generated earlier.
JITEmitter *JE = static_cast<JITEmitter*>(getCodeEmitter());
void *Stub = JE->getJITResolver().getLazyFunctionStub(F);
void JIT::freeMachineCodeForFunction(Function *F) {
// Delete translation for this from the ExecutionEngine, so it will get
// retranslated next time it is used.
- updateGlobalMapping(F, 0);
+ updateGlobalMapping(F, nullptr);
// Free the actual memory for the function body and related stuff.
static_cast<JITEmitter*>(JCE)->deallocateMemForFunction(F);
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