//
//===----------------------------------------------------------------------===//
-#ifndef LLVM_EXECUTION_ENGINE_H
-#define LLVM_EXECUTION_ENGINE_H
+#ifndef LLVM_EXECUTIONENGINE_EXECUTIONENGINE_H
+#define LLVM_EXECUTIONENGINE_EXECUTIONENGINE_H
-#include "llvm/MC/MCCodeGenInfo.h"
+#include "llvm-c/ExecutionEngine.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/ValueMap.h"
-#include "llvm/ADT/DenseMap.h"
+#include "llvm/IR/ValueHandle.h"
+#include "llvm/IR/ValueMap.h"
+#include "llvm/MC/MCCodeGenInfo.h"
#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/ValueHandle.h"
#include "llvm/Support/Mutex.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
-#include <vector>
#include <map>
#include <string>
+#include <vector>
namespace llvm {
struct GenericValue;
class Constant;
+class DataLayout;
class ExecutionEngine;
class Function;
class GlobalVariable;
class MachineCodeInfo;
class Module;
class MutexGuard;
-class TargetData;
+class ObjectCache;
+class RTDyldMemoryManager;
class Triple;
class Type;
+namespace object {
+ class Archive;
+ class ObjectFile;
+}
+
/// \brief Helper class for helping synchronize access to the global address map
-/// table.
+/// table. Access to this class should be serialized under a mutex.
class ExecutionEngineState {
public:
struct AddressMapConfig : public ValueMapConfig<const GlobalValue*> {
public:
ExecutionEngineState(ExecutionEngine &EE);
- GlobalAddressMapTy &getGlobalAddressMap(const MutexGuard &) {
+ GlobalAddressMapTy &getGlobalAddressMap() {
return GlobalAddressMap;
}
std::map<void*, AssertingVH<const GlobalValue> > &
- getGlobalAddressReverseMap(const MutexGuard &) {
+ getGlobalAddressReverseMap() {
return GlobalAddressReverseMap;
}
/// \brief Erase an entry from the mapping table.
///
- /// \returns The address that \arg ToUnmap was happed to.
- void *RemoveMapping(const MutexGuard &, const GlobalValue *ToUnmap);
+ /// \returns The address that \p ToUnmap was happed to.
+ void *RemoveMapping(const GlobalValue *ToUnmap);
};
/// \brief Abstract interface for implementation execution of LLVM modules,
ExecutionEngineState EEState;
/// The target data for the platform for which execution is being performed.
- const TargetData *TD;
+ const DataLayout *DL;
/// Whether lazy JIT compilation is enabled.
bool CompilingLazily;
/// using dlsym).
bool SymbolSearchingDisabled;
+ /// Whether the JIT should verify IR modules during compilation.
+ bool VerifyModules;
+
friend class EngineBuilder; // To allow access to JITCtor and InterpCtor.
protected:
/// optimize for the case where there is only one module.
SmallVector<Module*, 1> Modules;
- void setTargetData(const TargetData *td) { TD = td; }
+ void setDataLayout(const DataLayout *Val) { DL = Val; }
/// getMemoryforGV - Allocate memory for a global variable.
virtual char *getMemoryForGV(const GlobalVariable *GV);
// To avoid having libexecutionengine depend on the JIT and interpreter
// libraries, the execution engine implementations set these functions to ctor
// pointers at startup time if they are linked in.
- static ExecutionEngine *(*JITCtor)(
- Module *M,
- std::string *ErrorStr,
- JITMemoryManager *JMM,
- bool GVsWithCode,
- TargetMachine *TM);
static ExecutionEngine *(*MCJITCtor)(
Module *M,
std::string *ErrorStr,
- JITMemoryManager *JMM,
- bool GVsWithCode,
+ RTDyldMemoryManager *MCJMM,
TargetMachine *TM);
static ExecutionEngine *(*InterpCtor)(Module *M, std::string *ErrorStr);
/// abort.
void *(*LazyFunctionCreator)(const std::string &);
- /// ExceptionTableRegister - If Exception Handling is set, the JIT will
- /// register dwarf tables with this function.
- typedef void (*EERegisterFn)(void*);
- EERegisterFn ExceptionTableRegister;
- EERegisterFn ExceptionTableDeregister;
- /// This maps functions to their exception tables frames.
- DenseMap<const Function*, void*> AllExceptionTables;
-
-
public:
- /// lock - This lock protects the ExecutionEngine, JIT, JITResolver and
+ /// lock - This lock protects the ExecutionEngine, MCJIT, JIT, JITResolver and
/// JITEmitter classes. It must be held while changing the internal state of
/// any of those classes.
sys::Mutex lock;
virtual ~ExecutionEngine();
- /// create - This is the factory method for creating an execution engine which
- /// is appropriate for the current machine. This takes ownership of the
- /// module.
- ///
- /// \param GVsWithCode - Allocating globals with code breaks
- /// freeMachineCodeForFunction and is probably unsafe and bad for performance.
- /// However, we have clients who depend on this behavior, so we must support
- /// it. Eventually, when we're willing to break some backwards compatibility,
- /// this flag should be flipped to false, so that by default
- /// freeMachineCodeForFunction works.
- static ExecutionEngine *create(Module *M,
- bool ForceInterpreter = false,
- std::string *ErrorStr = 0,
- CodeGenOpt::Level OptLevel =
- CodeGenOpt::Default,
- bool GVsWithCode = true);
-
- /// createJIT - This is the factory method for creating a JIT for the current
- /// machine, it does not fall back to the interpreter. This takes ownership
- /// of the Module and JITMemoryManager if successful.
- ///
- /// Clients should make sure to initialize targets prior to calling this
- /// function.
- static ExecutionEngine *createJIT(Module *M,
- std::string *ErrorStr = 0,
- JITMemoryManager *JMM = 0,
- CodeGenOpt::Level OptLevel =
- CodeGenOpt::Default,
- bool GVsWithCode = true,
- Reloc::Model RM = Reloc::Default,
- CodeModel::Model CMM =
- CodeModel::JITDefault);
-
/// addModule - Add a Module to the list of modules that we can JIT from.
/// Note that this takes ownership of the Module: when the ExecutionEngine is
/// destroyed, it destroys the Module as well.
Modules.push_back(M);
}
+ /// addObjectFile - Add an ObjectFile to the execution engine.
+ ///
+ /// This method is only supported by MCJIT. MCJIT will immediately load the
+ /// object into memory and adds its symbols to the list used to resolve
+ /// external symbols while preparing other objects for execution.
+ ///
+ /// Objects added using this function will not be made executable until
+ /// needed by another object.
+ ///
+ /// MCJIT will take ownership of the ObjectFile.
+ virtual void addObjectFile(std::unique_ptr<object::ObjectFile> O);
+
+ /// addArchive - Add an Archive to the execution engine.
+ ///
+ /// This method is only supported by MCJIT. MCJIT will use the archive to
+ /// resolve external symbols in objects it is loading. If a symbol is found
+ /// in the Archive the contained object file will be extracted (in memory)
+ /// and loaded for possible execution.
+ virtual void addArchive(std::unique_ptr<object::Archive> A);
+
//===--------------------------------------------------------------------===//
- const TargetData *getTargetData() const { return TD; }
+ const DataLayout *getDataLayout() const { return DL; }
/// removeModule - Remove a Module from the list of modules. Returns true if
/// M is found.
/// FindFunctionNamed - Search all of the active modules to find the one that
/// defines FnName. This is very slow operation and shouldn't be used for
/// general code.
- Function *FindFunctionNamed(const char *FnName);
+ virtual Function *FindFunctionNamed(const char *FnName);
/// runFunction - Execute the specified function with the specified arguments,
/// and return the result.
/// found, this function silently returns a null pointer. Otherwise,
/// it prints a message to stderr and aborts.
///
+ /// This function is deprecated for the MCJIT execution engine.
+ ///
+ /// FIXME: the JIT and MCJIT interfaces should be disentangled or united
+ /// again, if possible.
+ ///
virtual void *getPointerToNamedFunction(const std::string &Name,
bool AbortOnFailure = true) = 0;
/// Map the address of a JIT section as returned from the memory manager
/// to the address in the target process as the running code will see it.
/// This is the address which will be used for relocation resolution.
- virtual void mapSectionAddress(void *LocalAddress, uint64_t TargetAddress) {
+ virtual void mapSectionAddress(const void *LocalAddress, uint64_t TargetAddress) {
llvm_unreachable("Re-mapping of section addresses not supported with this "
"EE!");
}
+ /// generateCodeForModule - Run code generationen for the specified module and
+ /// load it into memory.
+ ///
+ /// When this function has completed, all code and data for the specified
+ /// module, and any module on which this module depends, will be generated
+ /// and loaded into memory, but relocations will not yet have been applied
+ /// and all memory will be readable and writable but not executable.
+ ///
+ /// This function is primarily useful when generating code for an external
+ /// target, allowing the client an opportunity to remap section addresses
+ /// before relocations are applied. Clients that intend to execute code
+ /// locally can use the getFunctionAddress call, which will generate code
+ /// and apply final preparations all in one step.
+ ///
+ /// This method has no effect for the legacy JIT engine or the interpeter.
+ virtual void generateCodeForModule(Module *M) {}
+
+ /// finalizeObject - ensure the module is fully processed and is usable.
+ ///
+ /// It is the user-level function for completing the process of making the
+ /// object usable for execution. It should be called after sections within an
+ /// object have been relocated using mapSectionAddress. When this method is
+ /// called the MCJIT execution engine will reapply relocations for a loaded
+ /// object. This method has no effect for the legacy JIT engine or the
+ /// interpeter.
+ virtual void finalizeObject() {}
+
/// runStaticConstructorsDestructors - This method is used to execute all of
/// the static constructors or destructors for a program.
///
/// \param isDtors - Run the destructors instead of constructors.
- void runStaticConstructorsDestructors(bool isDtors);
+ virtual void runStaticConstructorsDestructors(bool isDtors);
/// runStaticConstructorsDestructors - This method is used to execute all of
/// the static constructors or destructors for a particular module.
/// getPointerToGlobalIfAvailable - This returns the address of the specified
/// global value if it is has already been codegen'd, otherwise it returns
/// null.
+ ///
+ /// This function is deprecated for the MCJIT execution engine. It doesn't
+ /// seem to be needed in that case, but an equivalent can be added if it is.
void *getPointerToGlobalIfAvailable(const GlobalValue *GV);
/// getPointerToGlobal - This returns the address of the specified global
/// value. This may involve code generation if it's a function.
+ ///
+ /// This function is deprecated for the MCJIT execution engine. Use
+ /// getGlobalValueAddress instead.
void *getPointerToGlobal(const GlobalValue *GV);
/// getPointerToFunction - The different EE's represent function bodies in
/// pointer should look like. When F is destroyed, the ExecutionEngine will
/// remove its global mapping and free any machine code. Be sure no threads
/// are running inside F when that happens.
+ ///
+ /// This function is deprecated for the MCJIT execution engine. Use
+ /// getFunctionAddress instead.
virtual void *getPointerToFunction(Function *F) = 0;
- /// getPointerToBasicBlock - The different EE's represent basic blocks in
- /// different ways. Return the representation for a blockaddress of the
- /// specified block.
- virtual void *getPointerToBasicBlock(BasicBlock *BB) = 0;
-
/// getPointerToFunctionOrStub - If the specified function has been
/// code-gen'd, return a pointer to the function. If not, compile it, or use
/// a stub to implement lazy compilation if available. See
/// getPointerToFunction for the requirements on destroying F.
+ ///
+ /// This function is deprecated for the MCJIT execution engine. Use
+ /// getFunctionAddress instead.
virtual void *getPointerToFunctionOrStub(Function *F) {
// Default implementation, just codegen the function.
return getPointerToFunction(F);
}
+ /// getGlobalValueAddress - Return the address of the specified global
+ /// value. This may involve code generation.
+ ///
+ /// This function should not be called with the JIT or interpreter engines.
+ virtual uint64_t getGlobalValueAddress(const std::string &Name) {
+ // Default implementation for JIT and interpreter. MCJIT will override this.
+ // JIT and interpreter clients should use getPointerToGlobal instead.
+ return 0;
+ }
+
+ /// getFunctionAddress - Return the address of the specified function.
+ /// This may involve code generation.
+ virtual uint64_t getFunctionAddress(const std::string &Name) {
+ // Default implementation for JIT and interpreter. MCJIT will override this.
+ // JIT and interpreter clients should use getPointerToFunction instead.
+ return 0;
+ }
+
// The JIT overrides a version that actually does this.
- virtual void runJITOnFunction(Function *, MachineCodeInfo * = 0) { }
+ virtual void runJITOnFunction(Function *, MachineCodeInfo * = nullptr) { }
/// getGlobalValueAtAddress - Return the LLVM global value object that starts
/// at the specified address.
void InitializeMemory(const Constant *Init, void *Addr);
- /// recompileAndRelinkFunction - This method is used to force a function which
- /// has already been compiled to be compiled again, possibly after it has been
- /// modified. Then the entry to the old copy is overwritten with a branch to
- /// the new copy. If there was no old copy, this acts just like
- /// VM::getPointerToFunction().
- virtual void *recompileAndRelinkFunction(Function *F) = 0;
-
- /// freeMachineCodeForFunction - Release memory in the ExecutionEngine
- /// corresponding to the machine code emitted to execute this function, useful
- /// for garbage-collecting generated code.
- virtual void freeMachineCodeForFunction(Function *F) = 0;
-
/// getOrEmitGlobalVariable - Return the address of the specified global
/// variable, possibly emitting it to memory if needed. This is used by the
/// Emitter.
+ ///
+ /// This function is deprecated for the MCJIT execution engine. Use
+ /// getGlobalValueAddress instead.
virtual void *getOrEmitGlobalVariable(const GlobalVariable *GV) {
- return getPointerToGlobal((GlobalValue*)GV);
+ return getPointerToGlobal((const GlobalValue *)GV);
}
/// Registers a listener to be called back on various events within
virtual void RegisterJITEventListener(JITEventListener *) {}
virtual void UnregisterJITEventListener(JITEventListener *) {}
+ /// Sets the pre-compiled object cache. The ownership of the ObjectCache is
+ /// not changed. Supported by MCJIT but not JIT.
+ virtual void setObjectCache(ObjectCache *) {
+ llvm_unreachable("No support for an object cache");
+ }
+
+ /// setProcessAllSections (MCJIT Only): By default, only sections that are
+ /// "required for execution" are passed to the RTDyldMemoryManager, and other
+ /// sections are discarded. Passing 'true' to this method will cause
+ /// RuntimeDyld to pass all sections to its RTDyldMemoryManager regardless
+ /// of whether they are "required to execute" in the usual sense.
+ ///
+ /// Rationale: Some MCJIT clients want to be able to inspect metadata
+ /// sections (e.g. Dwarf, Stack-maps) to enable functionality or analyze
+ /// performance. Passing these sections to the memory manager allows the
+ /// client to make policy about the relevant sections, rather than having
+ /// MCJIT do it.
+ virtual void setProcessAllSections(bool ProcessAllSections) {
+ llvm_unreachable("No support for ProcessAllSections option");
+ }
+
+ /// Return the target machine (if available).
+ virtual TargetMachine *getTargetMachine() { return nullptr; }
+
/// DisableLazyCompilation - When lazy compilation is off (the default), the
/// JIT will eagerly compile every function reachable from the argument to
/// getPointerToFunction. If lazy compilation is turned on, the JIT will only
return SymbolSearchingDisabled;
}
+ /// Enable/Disable IR module verification.
+ ///
+ /// Note: Module verification is enabled by default in Debug builds, and
+ /// disabled by default in Release. Use this method to override the default.
+ void setVerifyModules(bool Verify) {
+ VerifyModules = Verify;
+ }
+ bool getVerifyModules() const {
+ return VerifyModules;
+ }
+
/// InstallLazyFunctionCreator - If an unknown function is needed, the
/// specified function pointer is invoked to create it. If it returns null,
/// the JIT will abort.
LazyFunctionCreator = P;
}
- /// InstallExceptionTableRegister - The JIT will use the given function
- /// to register the exception tables it generates.
- void InstallExceptionTableRegister(EERegisterFn F) {
- ExceptionTableRegister = F;
- }
- void InstallExceptionTableDeregister(EERegisterFn F) {
- ExceptionTableDeregister = F;
- }
-
- /// RegisterTable - Registers the given pointer as an exception table. It
- /// uses the ExceptionTableRegister function.
- void RegisterTable(const Function *fn, void* res) {
- if (ExceptionTableRegister) {
- ExceptionTableRegister(res);
- AllExceptionTables[fn] = res;
- }
- }
-
- /// DeregisterTable - Deregisters the exception frame previously registered
- /// for the given function.
- void DeregisterTable(const Function *Fn) {
- if (ExceptionTableDeregister) {
- DenseMap<const Function*, void*>::iterator frame =
- AllExceptionTables.find(Fn);
- if(frame != AllExceptionTables.end()) {
- ExceptionTableDeregister(frame->second);
- AllExceptionTables.erase(frame);
- }
- }
- }
-
- /// DeregisterAllTables - Deregisters all previously registered pointers to an
- /// exception tables. It uses the ExceptionTableoDeregister function.
- void DeregisterAllTables();
-
protected:
explicit ExecutionEngine(Module *M);
EngineKind::Kind WhichEngine;
std::string *ErrorStr;
CodeGenOpt::Level OptLevel;
+ RTDyldMemoryManager *MCJMM;
JITMemoryManager *JMM;
- bool AllocateGVsWithCode;
TargetOptions Options;
Reloc::Model RelocModel;
CodeModel::Model CMModel;
std::string MArch;
std::string MCPU;
SmallVector<std::string, 4> MAttrs;
- bool UseMCJIT;
+ bool VerifyModules;
/// InitEngine - Does the common initialization of default options.
- void InitEngine() {
- WhichEngine = EngineKind::Either;
- ErrorStr = NULL;
- OptLevel = CodeGenOpt::Default;
- JMM = NULL;
- Options = TargetOptions();
- AllocateGVsWithCode = false;
- RelocModel = Reloc::Default;
- CMModel = CodeModel::JITDefault;
- UseMCJIT = false;
- }
+ void InitEngine();
public:
/// EngineBuilder - Constructor for EngineBuilder. If create() is called and
return *this;
}
- /// setJITMemoryManager - Sets the memory manager to use. This allows
- /// clients to customize their memory allocation policies. If create() is
- /// called and is successful, the created engine takes ownership of the
- /// memory manager. This option defaults to NULL.
+ /// setMCJITMemoryManager - Sets the MCJIT memory manager to use. This allows
+ /// clients to customize their memory allocation policies for the MCJIT. This
+ /// is only appropriate for the MCJIT; setting this and configuring the builder
+ /// to create anything other than MCJIT will cause a runtime error. If create()
+ /// is called and is successful, the created engine takes ownership of the
+ /// memory manager. This option defaults to NULL. Using this option nullifies
+ /// the setJITMemoryManager() option.
+ EngineBuilder &setMCJITMemoryManager(RTDyldMemoryManager *mcjmm) {
+ MCJMM = mcjmm;
+ JMM = nullptr;
+ return *this;
+ }
+
+ /// setJITMemoryManager - Sets the JIT memory manager to use. This allows
+ /// clients to customize their memory allocation policies. This is only
+ /// appropriate for either JIT or MCJIT; setting this and configuring the
+ /// builder to create an interpreter will cause a runtime error. If create()
+ /// is called and is successful, the created engine takes ownership of the
+ /// memory manager. This option defaults to NULL. This option overrides
+ /// setMCJITMemoryManager() as well.
EngineBuilder &setJITMemoryManager(JITMemoryManager *jmm) {
+ MCJMM = nullptr;
JMM = jmm;
return *this;
}
return *this;
}
- /// setAllocateGVsWithCode - Sets whether global values should be allocated
- /// into the same buffer as code. For most applications this should be set
- /// to false. Allocating globals with code breaks freeMachineCodeForFunction
- /// and is probably unsafe and bad for performance. However, we have clients
- /// who depend on this behavior, so we must support it. This option defaults
- /// to false so that users of the new API can safely use the new memory
- /// manager and free machine code.
- EngineBuilder &setAllocateGVsWithCode(bool a) {
- AllocateGVsWithCode = a;
- return *this;
- }
-
/// setMArch - Override the architecture set by the Module's triple.
EngineBuilder &setMArch(StringRef march) {
MArch.assign(march.begin(), march.end());
return *this;
}
- /// setUseMCJIT - Set whether the MC-JIT implementation should be used
- /// (experimental).
- EngineBuilder &setUseMCJIT(bool Value) {
- UseMCJIT = Value;
+ /// setVerifyModules - Set whether the JIT implementation should verify
+ /// IR modules during compilation.
+ EngineBuilder &setVerifyModules(bool Verify) {
+ VerifyModules = Verify;
return *this;
}
ExecutionEngine *create(TargetMachine *TM);
};
+// Create wrappers for C Binding types (see CBindingWrapping.h).
+DEFINE_SIMPLE_CONVERSION_FUNCTIONS(ExecutionEngine, LLVMExecutionEngineRef)
+
} // End llvm namespace
#endif
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