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