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e2925289c9
Adds basic support for LLJITBuilder and DynamicLibrarySearchGenerator. This allows C API clients to configure LLJIT to expose process symbols to JIT'd code. An example of this is added in llvm/examples/OrcV2CBindingsReflectProcessSymbols.
307 lines
12 KiB
C++
307 lines
12 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/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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* 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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* A reference to an orc::SymbolStringPool table entry.
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*/
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typedef struct LLVMOrcQuaqueSymbolStringPoolEntryPtr
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*LLVMOrcSymbolStringPoolEntryRef;
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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::JITDylib::DefinitionGenerator.
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*/
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typedef struct LLVMOrcOpaqueJITDylibDefinitionGenerator
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*LLVMOrcJITDylibDefinitionGeneratorRef;
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/**
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* Predicate function for SymbolStringPoolEntries.
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*/
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typedef int (*LLVMOrcSymbolPredicate)(LLVMOrcSymbolStringPoolEntryRef Sym,
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void *Ctx);
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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::LLJITBuilder instance.
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*/
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typedef struct LLVMOrcOpaqueLLJITBuilder *LLVMOrcLLJITBuilderRef;
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/**
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* A reference to an orc::LLJIT instance.
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*/
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typedef struct LLVMOrcOpaqueLLJIT *LLVMOrcLLJITRef;
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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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* 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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/**
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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 LLVMOrcDisposeJITDylibDefinitionGenerator(
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LLVMOrcJITDylibDefinitionGeneratorRef DG);
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/**
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* Add a JITDylib::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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LLVMOrcJITDylibDefinitionGeneratorRef DG);
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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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LLVMOrcJITDylibDefinitionGeneratorRef *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), in which case 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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* Dispose of a JITTargetMachineBuilder.
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*/
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void LLVMOrcDisposeJITTargetMachineBuilder(
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LLVMOrcJITTargetMachineBuilderRef JTMB);
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/**
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* Create an LLJITTargetMachineBuilder.
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*
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* The client owns the resulting LLJITBuilder and should dispose of it using
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* LLVMOrcDisposeLLJITBuilder once they are done with it.
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*/
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LLVMOrcLLJITBuilderRef LLVMOrcCreateLLJITBuilder(void);
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/**
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* Dispose of an LLVMOrcLLJITBuilderRef. This should only be called if ownership
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* has not been passed to LLVMOrcCreateLLJIT (e.g. because some error prevented
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* that function from being called).
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*/
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void LLVMOrcDisposeLLJITBuilder(LLVMOrcLLJITBuilderRef Builder);
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/**
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* Set the JITTargetMachineBuilder to be used when constructing the LLJIT
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* instance. Calling this function is optional: if it is not called then the
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* LLJITBuilder will use JITTargeTMachineBuilder::detectHost to construct a
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* JITTargetMachineBuilder.
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*/
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void LLVMOrcLLJITBuilderSetJITTargetMachineBuilder(
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LLVMOrcLLJITBuilderRef Builder, LLVMOrcJITTargetMachineBuilderRef JTMB);
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/**
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* Create an LLJIT instance from an LLJITBuilder.
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*
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* This operation takes ownership of the Builder argument: clients should not
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* dispose of the builder after calling this function (even if the function
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* returns an error). If a null Builder argument is provided then a
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* default-constructed LLJITBuilder will be used.
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*
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* On success the resulting LLJIT instance is uniquely owned by the client and
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* automatically manages the memory of all JIT'd code and all modules that are
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* transferred to it (e.g. via LLVMOrcLLJITAddLLVMIRModule). Disposing of the
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* LLJIT instance will free all memory managed by the JIT, including JIT'd code
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* and not-yet compiled modules.
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*/
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LLVMErrorRef LLVMOrcCreateLLJIT(LLVMOrcLLJITRef *Result,
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LLVMOrcLLJITBuilderRef Builder);
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/**
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* Dispose of an LLJIT instance.
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*/
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LLVMErrorRef LLVMOrcDisposeLLJIT(LLVMOrcLLJITRef J);
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/**
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* Get a reference to the ExecutionSession for this LLJIT instance.
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*
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* The ExecutionSession is owned by the LLJIT instance. The client is not
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* responsible for managing its memory.
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*/
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LLVMOrcExecutionSessionRef LLVMOrcLLJITGetExecutionSession(LLVMOrcLLJITRef J);
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/**
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* Return a reference to the Main JITDylib.
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*
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* The JITDylib is owned by the LLJIT instance. The client is not responsible
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* for managing its memory.
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*/
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LLVMOrcJITDylibRef LLVMOrcLLJITGetMainJITDylib(LLVMOrcLLJITRef J);
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/**
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* Returns the global prefix character according to the LLJIT's DataLayout.
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*/
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char LLVMOrcLLJITGetGlobalPrefix(LLVMOrcLLJITRef J);
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/**
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* Mangles the given string according to the LLJIT instance's DataLayout, then
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* interns the result in the SymbolStringPool and returns a reference to the
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* pool entry. Clients should call LLVMOrcReleaseSymbolStringPoolEntry to
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* decrement the ref-count on the pool entry once they are finished with this
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* value.
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*/
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LLVMOrcSymbolStringPoolEntryRef
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LLVMOrcLLJITMangleAndIntern(LLVMOrcLLJITRef J, const char *UnmangledName);
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/**
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* Add an IR module to the main JITDylib of the given LLJIT instance. This
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* operation takes ownership of the TSM argument which should not be disposed
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* of or referenced once this function returns.
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*/
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LLVMErrorRef LLVMOrcLLJITAddLLVMIRModule(LLVMOrcLLJITRef J,
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LLVMOrcThreadSafeModuleRef TSM);
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/**
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* Look up the given symbol in the main JITDylib of the given LLJIT instance.
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*
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* This operation does not take ownership of the Name argument.
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*/
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LLVMErrorRef LLVMOrcLLJITLookup(LLVMOrcLLJITRef J,
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LLVMOrcJITTargetAddress *Result,
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const char *Name);
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LLVM_C_EXTERN_C_END
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#endif /* LLVM_C_ORC_H */
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