93 lines
4.0 KiB
OCaml
93 lines
4.0 KiB
OCaml
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(*===-- llvm_executionengine.mli - LLVM OCaml Interface -------*- OCaml -*-===*
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*
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* Part of the LLVM Project, under the Apache License v2.0 with LLVM 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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(** JIT Interpreter.
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This interface provides an OCaml API for LLVM execution engine (JIT/
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interpreter), the classes in the [ExecutionEngine] library. *)
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exception Error of string
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(** [initialize ()] initializes the backend corresponding to the host.
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Returns [true] if initialization is successful; [false] indicates
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that there is no such backend or it is unable to emit object code
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via MCJIT. *)
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val initialize : unit -> bool
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(** An execution engine is either a JIT compiler or an interpreter, capable of
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directly loading an LLVM module and executing its functions without first
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invoking a static compiler and generating a native executable. *)
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type llexecutionengine
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(** MCJIT compiler options. See [llvm::TargetOptions]. *)
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type llcompileroptions = {
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opt_level: int;
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code_model: Llvm_target.CodeModel.t;
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no_framepointer_elim: bool;
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enable_fast_isel: bool;
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}
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(** Default MCJIT compiler options:
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[{ opt_level = 0; code_model = CodeModel.JIT_default;
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no_framepointer_elim = false; enable_fast_isel = false }] *)
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val default_compiler_options : llcompileroptions
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(** [create m optlevel] creates a new MCJIT just-in-time compiler, taking
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ownership of the module [m] if successful with the desired optimization
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level [optlevel]. Raises [Error msg] if an error occurrs. The execution
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engine is not garbage collected and must be destroyed with [dispose ee].
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Run {!initialize} before using this function.
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See the function [llvm::EngineBuilder::create]. *)
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val create : ?options:llcompileroptions -> Llvm.llmodule -> llexecutionengine
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(** [dispose ee] releases the memory used by the execution engine and must be
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invoked to avoid memory leaks. *)
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val dispose : llexecutionengine -> unit
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(** [add_module m ee] adds the module [m] to the execution engine [ee]. *)
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val add_module : Llvm.llmodule -> llexecutionengine -> unit
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(** [remove_module m ee] removes the module [m] from the execution engine
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[ee]. Raises [Error msg] if an error occurs. *)
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val remove_module : Llvm.llmodule -> llexecutionengine -> unit
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(** [run_static_ctors ee] executes the static constructors of each module in
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the execution engine [ee]. *)
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val run_static_ctors : llexecutionengine -> unit
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(** [run_static_dtors ee] executes the static destructors of each module in
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the execution engine [ee]. *)
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val run_static_dtors : llexecutionengine -> unit
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(** [data_layout ee] is the data layout of the execution engine [ee]. *)
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val data_layout : llexecutionengine -> Llvm_target.DataLayout.t
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(** [add_global_mapping gv ptr ee] tells the execution engine [ee] that
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the global [gv] is at the specified location [ptr], which must outlive
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[gv] and [ee].
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All uses of [gv] in the compiled code will refer to [ptr]. *)
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val add_global_mapping : Llvm.llvalue -> 'a Ctypes.ptr -> llexecutionengine -> unit
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(** [get_global_value_address id typ ee] returns a pointer to the
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identifier [id] as type [typ], which will be a pointer type for a
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value, and which will be live as long as [id] and [ee]
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are. Caution: this function finalizes, i.e. forces code
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generation, all loaded modules. Further modifications to the
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modules will not have any effect. *)
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val get_global_value_address : string -> 'a Ctypes.typ -> llexecutionengine -> 'a
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(** [get_function_address fn typ ee] returns a pointer to the function
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[fn] as type [typ], which will be a pointer type for a function
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(e.g. [(int -> int) typ]), and which will be live as long as [fn]
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and [ee] are. Caution: this function finalizes, i.e. forces code
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generation, all loaded modules. Further modifications to the
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modules will not have any effect. *)
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val get_function_address : string -> 'a Ctypes.typ -> llexecutionengine -> 'a
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