/*===---------------- llvm-c/Orc.h - OrcV2 C bindings -----------*- C++ -*-===*\
|* *|
|* Part of the LLVM Project, under the Apache License v2.0 with LLVM *|
|* Exceptions. *|
|* See https://llvm.org/LICENSE.txt for license information. *|
|* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception *|
|* *|
|*===----------------------------------------------------------------------===*|
|* *|
|* This header declares the C interface to libLLVMOrcJIT.a, which implements *|
|* JIT compilation of LLVM IR. Minimal documentation of C API specific issues *|
|* (especially memory ownership rules) is provided. Core Orc concepts are *|
|* documented in llvm/docs/ORCv2.rst and APIs are documented in the C++ *|
|* headers *|
|* *|
|* Many exotic languages can interoperate with C code but have a harder time *|
|* with C++ due to name mangling. So in addition to C, this interface enables *|
|* tools written in such languages. *|
|* *|
|* Note: This interface is experimental. It is *NOT* stable, and may be *|
|* changed without warning. Only C API usage documentation is *|
|* provided. See the C++ documentation for all higher level ORC API *|
|* details. *|
|* *|
\*===----------------------------------------------------------------------===*/
#ifndef LLVM_C_ORC_H
#define LLVM_C_ORC_H
#include "llvm-c/Error.h"
#include "llvm-c/TargetMachine.h"
#include "llvm-c/Types.h"
LLVM_C_EXTERN_C_BEGIN
/**
* Represents an address in the target process.
*/
typedef uint64_t LLVMOrcJITTargetAddress;
/**
* Represents generic linkage flags for a symbol definition.
*/
typedef enum {
LLVMJITSymbolGenericFlagsExported = 1U << 0,
LLVMJITSymbolGenericFlagsWeak = 1U << 1
} LLVMJITSymbolGenericFlags;
/**
* Represents target specific flags for a symbol definition.
*/
typedef uint8_t LLVMJITTargetSymbolFlags;
/**
* Represents the linkage flags for a symbol definition.
*/
typedef struct {
uint8_t GenericFlags;
uint8_t TargetFlags;
} LLVMJITSymbolFlags;
/**
* Represents an evaluated symbol address and flags.
*/
typedef struct {
LLVMOrcJITTargetAddress Address;
LLVMJITSymbolFlags Flags;
} LLVMJITEvaluatedSymbol;
/**
* A reference to an orc::ExecutionSession instance.
*/
typedef struct LLVMOrcOpaqueExecutionSession *LLVMOrcExecutionSessionRef;
/**
* Error reporter function.
*/
typedef void (*LLVMOrcErrorReporterFunction)(void *Ctx, LLVMErrorRef Err);
/**
* A reference to an orc::SymbolStringPool.
*/
typedef struct LLVMOrcOpaqueSymbolStringPool *LLVMOrcSymbolStringPoolRef;
/**
* A reference to an orc::SymbolStringPool table entry.
*/
typedef struct LLVMOrcOpaqueSymbolStringPoolEntry
*LLVMOrcSymbolStringPoolEntryRef;
/**
* Represents a pair of a symbol name and an evaluated symbol.
*/
typedef struct {
LLVMOrcSymbolStringPoolEntryRef Name;
LLVMJITEvaluatedSymbol Sym;
} LLVMJITCSymbolMapPair;
/**
* Represents a list of (SymbolStringPtr, JITEvaluatedSymbol) pairs that can be
* used to construct a SymbolMap.
*/
typedef LLVMJITCSymbolMapPair *LLVMOrcCSymbolMapPairs;
/**
* Lookup kind. This can be used by definition generators when deciding whether
* to produce a definition for a requested symbol.
*
* This enum should be kept in sync with llvm::orc::LookupKind.
*/
typedef enum {
LLVMOrcLookupKindStatic,
LLVMOrcLookupKindDLSym
} LLVMOrcLookupKind;
/**
* JITDylib lookup flags. This can be used by definition generators when
* deciding whether to produce a definition for a requested symbol.
*
* This enum should be kept in sync with llvm::orc::JITDylibLookupFlags.
*/
typedef enum {
LLVMOrcJITDylibLookupFlagsMatchExportedSymbolsOnly,
LLVMOrcJITDylibLookupFlagsMatchAllSymbols
} LLVMOrcJITDylibLookupFlags;
/**
* Symbol lookup flags for lookup sets. This should be kept in sync with
* llvm::orc::SymbolLookupFlags.
*/
typedef enum {
LLVMOrcSymbolLookupFlagsRequiredSymbol,
LLVMOrcSymbolLookupFlagsWeaklyReferencedSymbol
} LLVMOrcSymbolLookupFlags;
/**
* An element type for a symbol lookup set.
*/
typedef struct {
LLVMOrcSymbolStringPoolEntryRef Name;
LLVMOrcSymbolLookupFlags LookupFlags;
} LLVMOrcCLookupSetElement;
/**
* A set of symbols to look up / generate.
*
* The list is terminated with an element containing a null pointer for the
* Name field.
*
* If a client creates an instance of this type then they are responsible for
* freeing it, and for ensuring that all strings have been retained over the
* course of its life. Clients receiving a copy from a callback are not
* responsible for managing lifetime or retain counts.
*/
typedef LLVMOrcCLookupSetElement *LLVMOrcCLookupSet;
/**
* A reference to an orc::MaterializationUnit.
*/
typedef struct LLVMOrcOpaqueMaterializationUnit *LLVMOrcMaterializationUnitRef;
/**
* A reference to an orc::JITDylib instance.
*/
typedef struct LLVMOrcOpaqueJITDylib *LLVMOrcJITDylibRef;
/**
* A reference to an orc::ResourceTracker instance.
*/
typedef struct LLVMOrcOpaqueResourceTracker *LLVMOrcResourceTrackerRef;
/**
* A reference to an orc::DefinitionGenerator.
*/
typedef struct LLVMOrcOpaqueDefinitionGenerator
*LLVMOrcDefinitionGeneratorRef;
/**
* An opaque lookup state object. Instances of this type can be captured to
* suspend a lookup while a custom generator function attempts to produce a
* definition.
*
* If a client captures a lookup state object then they must eventually call
* LLVMOrcLookupStateContinueLookup to restart the lookup. This is required
* in order to release memory allocated for the lookup state, even if errors
* have occurred while the lookup was suspended (if these errors have made the
* lookup impossible to complete then it will issue its own error before
* destruction).
*/
typedef struct LLVMOrcOpaqueLookupState *LLVMOrcLookupStateRef;
/**
* A custom generator function. This can be used to create a custom generator
* object using LLVMOrcCreateCustomCAPIDefinitionGenerator. The resulting
* object can be attached to a JITDylib, via LLVMOrcJITDylibAddGenerator, to
* receive callbacks when lookups fail to match existing definitions.
*
* GeneratorObj will contain the address of the custom generator object.
*
* Ctx will contain the context object passed to
* LLVMOrcCreateCustomCAPIDefinitionGenerator.
*
* LookupState will contain a pointer to an LLVMOrcLookupStateRef object. This
* can optionally be modified to make the definition generation process
* asynchronous: If the LookupStateRef value is copied, and the original
* LLVMOrcLookupStateRef set to null, the lookup will be suspended. Once the
* asynchronous definition process has been completed clients must call
* LLVMOrcLookupStateContinueLookup to continue the lookup (this should be
* done unconditionally, even if errors have occurred in the mean time, to
* free the lookup state memory and notify the query object of the failures. If
* LookupState is captured this function must return LLVMErrorSuccess.
*
* The Kind argument can be inspected to determine the lookup kind (e.g.
* as-if-during-static-link, or as-if-during-dlsym).
*
* The JD argument specifies which JITDylib the definitions should be generated
* into.
*
* The JDLookupFlags argument can be inspected to determine whether the original
* lookup included non-exported symobls.
*
* Finally, the LookupSet argument contains the set of symbols that could not
* be found in JD already (the set of generation candidates).
*/
typedef LLVMErrorRef (*LLVMOrcCAPIDefinitionGeneratorTryToGenerateFunction)(
LLVMOrcDefinitionGeneratorRef GeneratorObj, void *Ctx,
LLVMOrcLookupStateRef *LookupState, LLVMOrcLookupKind Kind,
LLVMOrcJITDylibRef JD, LLVMOrcJITDylibLookupFlags JDLookupFlags,
LLVMOrcCLookupSet LookupSet, size_t LookupSetSize);
/**
* Predicate function for SymbolStringPoolEntries.
*/
typedef int (*LLVMOrcSymbolPredicate)(void *Ctx,
LLVMOrcSymbolStringPoolEntryRef Sym);
/**
* A reference to an orc::ThreadSafeContext instance.
*/
typedef struct LLVMOrcOpaqueThreadSafeContext *LLVMOrcThreadSafeContextRef;
/**
* A reference to an orc::ThreadSafeModule instance.
*/
typedef struct LLVMOrcOpaqueThreadSafeModule *LLVMOrcThreadSafeModuleRef;
/**
* A reference to an orc::JITTargetMachineBuilder instance.
*/
typedef struct LLVMOrcOpaqueJITTargetMachineBuilder
*LLVMOrcJITTargetMachineBuilderRef;
/**
* A reference to an orc::ObjectLayer instance.
*/
typedef struct LLVMOrcOpaqueObjectLayer *LLVMOrcObjectLayerRef;
/**
* Attach a custom error reporter function to the ExecutionSession.
*
* The error reporter will be called to deliver failure notices that can not be
* directly reported to a caller. For example, failure to resolve symbols in
* the JIT linker is typically reported via the error reporter (callers
* requesting definitions from the JIT will typically be delivered a
* FailureToMaterialize error instead).
*/
void LLVMOrcExecutionSessionSetErrorReporter(
LLVMOrcExecutionSessionRef ES, LLVMOrcErrorReporterFunction ReportError,
void *Ctx);
/**
* Return a reference to the SymbolStringPool for an ExecutionSession.
*
* Ownership of the pool remains with the ExecutionSession: The caller is
* not required to free the pool.
*/
LLVMOrcSymbolStringPoolRef
LLVMOrcExecutionSessionGetSymbolStringPool(LLVMOrcExecutionSessionRef ES);
/**
* Clear all unreferenced symbol string pool entries.
*
* This can be called at any time to release unused entries in the
* ExecutionSession's string pool. Since it locks the pool (preventing
* interning of any new strings) it is recommended that it only be called
* infrequently, ideally when the caller has reason to believe that some
* entries will have become unreferenced, e.g. after removing a module or
* closing a JITDylib.
*/
void LLVMOrcSymbolStringPoolClearDeadEntries(LLVMOrcSymbolStringPoolRef SSP);
/**
* Intern a string in the ExecutionSession's SymbolStringPool and return a
* reference to it. This increments the ref-count of the pool entry, and the
* returned value should be released once the client is done with it by
* calling LLVMOrReleaseSymbolStringPoolEntry.
*
* Since strings are uniqued within the SymbolStringPool
* LLVMOrcSymbolStringPoolEntryRefs can be compared by value to test string
* equality.
*
* Note that this function does not perform linker-mangling on the string.
*/
LLVMOrcSymbolStringPoolEntryRef
LLVMOrcExecutionSessionIntern(LLVMOrcExecutionSessionRef ES, const char *Name);
/**
* Increments the ref-count for a SymbolStringPool entry.
*/
void LLVMOrcRetainSymbolStringPoolEntry(LLVMOrcSymbolStringPoolEntryRef S);
/**
* Reduces the ref-count for of a SymbolStringPool entry.
*/
void LLVMOrcReleaseSymbolStringPoolEntry(LLVMOrcSymbolStringPoolEntryRef S);
const char *LLVMOrcSymbolStringPoolEntryStr(LLVMOrcSymbolStringPoolEntryRef S);
/**
* Reduces the ref-count of a ResourceTracker.
*/
void LLVMOrcReleaseResourceTracker(LLVMOrcResourceTrackerRef RT);
/**
* Transfers tracking of all resources associated with resource tracker SrcRT
* to resource tracker DstRT.
*/
void LLVMOrcResourceTrackerTransferTo(LLVMOrcResourceTrackerRef SrcRT,
LLVMOrcResourceTrackerRef DstRT);
/**
* Remove all resources associated with the given tracker. See
* ResourceTracker::remove().
*/
LLVMErrorRef LLVMOrcResourceTrackerRemove(LLVMOrcResourceTrackerRef RT);
/**
* Dispose of a JITDylib::DefinitionGenerator. This should only be called if
* ownership has not been passed to a JITDylib (e.g. because some error
* prevented the client from calling LLVMOrcJITDylibAddGenerator).
*/
void LLVMOrcDisposeDefinitionGenerator(
LLVMOrcDefinitionGeneratorRef DG);
/**
* Dispose of a MaterializationUnit.
*/
void LLVMOrcDisposeMaterializationUnit(LLVMOrcMaterializationUnitRef MU);
/**
* Create a MaterializationUnit to define the given symbols as pointing to
* the corresponding raw addresses.
*/
LLVMOrcMaterializationUnitRef
LLVMOrcAbsoluteSymbols(LLVMOrcCSymbolMapPairs Syms, size_t NumPairs);
/**
* Create a "bare" JITDylib.
*
* The client is responsible for ensuring that the JITDylib's name is unique,
* e.g. by calling LLVMOrcExecutionSessionGetJTIDylibByName first.
*
* This call does not install any library code or symbols into the newly
* created JITDylib. The client is responsible for all configuration.
*/
LLVMOrcJITDylibRef
LLVMOrcExecutionSessionCreateBareJITDylib(LLVMOrcExecutionSessionRef ES,
const char *Name);
/**
* Create a JITDylib.
*
* The client is responsible for ensuring that the JITDylib's name is unique,
* e.g. by calling LLVMOrcExecutionSessionGetJTIDylibByName first.
*
* If a Platform is attached to the ExecutionSession then
* Platform::setupJITDylib will be called to install standard platform symbols
* (e.g. standard library interposes). If no Platform is installed then this
* call is equivalent to LLVMExecutionSessionRefCreateBareJITDylib and will
* always return success.
*/
LLVMErrorRef
LLVMOrcExecutionSessionCreateJITDylib(LLVMOrcExecutionSessionRef ES,
LLVMOrcJITDylibRef *Result,
const char *Name);
/**
* Returns the JITDylib with the given name, or NULL if no such JITDylib
* exists.
*/
LLVMOrcJITDylibRef LLVMOrcExecutionSessionGetJITDylibByName(const char *Name);
/**
* Return a reference to a newly created resource tracker associated with JD.
* The tracker is returned with an initial ref-count of 1, and must be released
* with LLVMOrcReleaseResourceTracker when no longer needed.
*/
LLVMOrcResourceTrackerRef
LLVMOrcJITDylibCreateResourceTracker(LLVMOrcJITDylibRef JD);
/**
* Return a reference to the default resource tracker for the given JITDylib.
* This operation will increase the retain count of the tracker: Clients should
* call LLVMOrcReleaseResourceTracker when the result is no longer needed.
*/
LLVMOrcResourceTrackerRef
LLVMOrcJITDylibGetDefaultResourceTracker(LLVMOrcJITDylibRef JD);
/**
* Add the given MaterializationUnit to the given JITDylib.
*
* If this operation succeeds then JITDylib JD will take ownership of MU.
* If the operation fails then ownership remains with the caller who should
* call LLVMOrcDisposeMaterializationUnit to destroy it.
*/
LLVMErrorRef LLVMOrcJITDylibDefine(LLVMOrcJITDylibRef JD,
LLVMOrcMaterializationUnitRef MU);
/**
* Calls remove on all trackers associated with this JITDylib, see
* JITDylib::clear().
*/
LLVMErrorRef LLVMOrcJITDylibClear(LLVMOrcJITDylibRef JD);
/**
* Add a DefinitionGenerator to the given JITDylib.
*
* The JITDylib will take ownership of the given generator: The client is no
* longer responsible for managing its memory.
*/
void LLVMOrcJITDylibAddGenerator(LLVMOrcJITDylibRef JD,
LLVMOrcDefinitionGeneratorRef DG);
/**
* Create a custom generator.
*/
LLVMOrcDefinitionGeneratorRef LLVMOrcCreateCustomCAPIDefinitionGenerator(
LLVMOrcCAPIDefinitionGeneratorTryToGenerateFunction F, void *Ctx);
/**
* Get a DynamicLibrarySearchGenerator that will reflect process symbols into
* the JITDylib. On success the resulting generator is owned by the client.
* Ownership is typically transferred by adding the instance to a JITDylib
* using LLVMOrcJITDylibAddGenerator,
*
* The GlobalPrefix argument specifies the character that appears on the front
* of linker-mangled symbols for the target platform (e.g. '_' on MachO).
* If non-null, this character will be stripped from the start of all symbol
* strings before passing the remaining substring to dlsym.
*
* The optional Filter and Ctx arguments can be used to supply a symbol name
* filter: Only symbols for which the filter returns true will be visible to
* JIT'd code. If the Filter argument is null then all process symbols will
* be visible to JIT'd code. Note that the symbol name passed to the Filter
* function is the full mangled symbol: The client is responsible for stripping
* the global prefix if present.
*/
LLVMErrorRef LLVMOrcCreateDynamicLibrarySearchGeneratorForProcess(
LLVMOrcDefinitionGeneratorRef *Result, char GlobalPrefx,
LLVMOrcSymbolPredicate Filter, void *FilterCtx);
/**
* Create a ThreadSafeContext containing a new LLVMContext.
*
* Ownership of the underlying ThreadSafeContext data is shared: Clients
* can and should dispose of their ThreadSafeContext as soon as they no longer
* need to refer to it directly. Other references (e.g. from ThreadSafeModules)
* will keep the data alive as long as it is needed.
*/
LLVMOrcThreadSafeContextRef LLVMOrcCreateNewThreadSafeContext(void);
/**
* Get a reference to the wrapped LLVMContext.
*/
LLVMContextRef
LLVMOrcThreadSafeContextGetContext(LLVMOrcThreadSafeContextRef TSCtx);
/**
* Dispose of a ThreadSafeContext.
*/
void LLVMOrcDisposeThreadSafeContext(LLVMOrcThreadSafeContextRef TSCtx);
/**
* Create a ThreadSafeModule wrapper around the given LLVM module. This takes
* ownership of the M argument which should not be disposed of or referenced
* after this function returns.
*
* Ownership of the ThreadSafeModule is unique: If it is transferred to the JIT
* (e.g. by LLVMOrcLLJITAddLLVMIRModule) then the client is no longer
* responsible for it. If it is not transferred to the JIT then the client
* should call LLVMOrcDisposeThreadSafeModule to dispose of it.
*/
LLVMOrcThreadSafeModuleRef
LLVMOrcCreateNewThreadSafeModule(LLVMModuleRef M,
LLVMOrcThreadSafeContextRef TSCtx);
/**
* Dispose of a ThreadSafeModule. This should only be called if ownership has
* not been passed to LLJIT (e.g. because some error prevented the client from
* adding this to the JIT).
*/
void LLVMOrcDisposeThreadSafeModule(LLVMOrcThreadSafeModuleRef TSM);
/**
* Create a JITTargetMachineBuilder by detecting the host.
*
* On success the client owns the resulting JITTargetMachineBuilder. It must be
* passed to a consuming operation (e.g. LLVMOrcCreateLLJITBuilder) or disposed
* of by calling LLVMOrcDisposeJITTargetMachineBuilder.
*/
LLVMErrorRef LLVMOrcJITTargetMachineBuilderDetectHost(
LLVMOrcJITTargetMachineBuilderRef *Result);
/**
* Create a JITTargetMachineBuilder from the given TargetMachine template.
*
* This operation takes ownership of the given TargetMachine and destroys it
* before returing. The resulting JITTargetMachineBuilder is owned by the client
* and must be passed to a consuming operation (e.g. LLVMOrcCreateLLJITBuilder)
* or disposed of by calling LLVMOrcDisposeJITTargetMachineBuilder.
*/
LLVMOrcJITTargetMachineBuilderRef
LLVMOrcJITTargetMachineBuilderCreateFromTargetMachine(LLVMTargetMachineRef TM);
/**
* Dispose of a JITTargetMachineBuilder.
*/
void LLVMOrcDisposeJITTargetMachineBuilder(
LLVMOrcJITTargetMachineBuilderRef JTMB);
/**
* Dispose of an ObjectLayer.
*/
void LLVMOrcDisposeObjectLayer(LLVMOrcObjectLayerRef ObjLayer);
LLVM_C_EXTERN_C_END
#endif /* LLVM_C_ORC_H */
