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a156efdf71
See http://caml.inria.fr/mantis/view.php?id=4166 If we call only external functions from a module, then its 'let _' bindings don't get executed, which means that the exceptions don't get registered for use in the C code. This in turn causes llvm_raise to call raise_with_arg() with a NULL pointer and cause a segmentation fault. The workaround is to declare all 'external' functions as 'val' in these .mli files. Also added a separate testcase (the testcase must call only external functions for the bug to occur). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122497 91177308-0d34-0410-b5e6-96231b3b80d8
164 lines
6.9 KiB
OCaml
164 lines
6.9 KiB
OCaml
(*===-- llvm_executionengine.mli - LLVM Ocaml Interface ---------*- C++ -*-===*
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*
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* The LLVM Compiler Infrastructure
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*
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* This file is distributed under the University of Illinois Open Source
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* License. See LICENSE.TXT for details.
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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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module GenericValue: sig
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(** [GenericValue.t] is a boxed union type used to portably pass arguments to
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and receive values from the execution engine. It supports only a limited
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selection of types; for more complex argument types, it is necessary to
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generate a stub function by hand or to pass parameters by reference.
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See the struct [llvm::GenericValue]. *)
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type t
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(** [of_float fpty n] boxes the float [n] in a float-valued generic value
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according to the floating point type [fpty]. See the fields
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[llvm::GenericValue::DoubleVal] and [llvm::GenericValue::FloatVal]. *)
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val of_float : Llvm.lltype -> float -> t
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(** [of_pointer v] boxes the pointer value [v] in a generic value. See the
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field [llvm::GenericValue::PointerVal]. *)
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val of_pointer : 'a -> t
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(** [of_int32 n w] boxes the int32 [i] in a generic value with the bitwidth
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[w]. See the field [llvm::GenericValue::IntVal]. *)
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val of_int32 : Llvm.lltype -> int32 -> t
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(** [of_int n w] boxes the int [i] in a generic value with the bitwidth
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[w]. See the field [llvm::GenericValue::IntVal]. *)
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val of_int : Llvm.lltype -> int -> t
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(** [of_natint n w] boxes the native int [i] in a generic value with the
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bitwidth [w]. See the field [llvm::GenericValue::IntVal]. *)
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val of_nativeint : Llvm.lltype -> nativeint -> t
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(** [of_int64 n w] boxes the int64 [i] in a generic value with the bitwidth
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[w]. See the field [llvm::GenericValue::IntVal]. *)
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val of_int64 : Llvm.lltype -> int64 -> t
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(** [as_float fpty gv] unboxes the floating point-valued generic value [gv] of
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floating point type [fpty]. See the fields [llvm::GenericValue::DoubleVal]
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and [llvm::GenericValue::FloatVal]. *)
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val as_float : Llvm.lltype -> t -> float
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(** [as_pointer gv] unboxes the pointer-valued generic value [gv]. See the
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field [llvm::GenericValue::PointerVal]. *)
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val as_pointer : t -> 'a
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(** [as_int32 gv] unboxes the integer-valued generic value [gv] as an [int32].
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Is invalid if [gv] has a bitwidth greater than 32 bits. See the field
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[llvm::GenericValue::IntVal]. *)
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val as_int32 : t -> int32
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(** [as_int gv] unboxes the integer-valued generic value [gv] as an [int].
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Is invalid if [gv] has a bitwidth greater than the host bit width (but the
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most significant bit may be lost). See the field
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[llvm::GenericValue::IntVal]. *)
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val as_int : t -> int
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(** [as_natint gv] unboxes the integer-valued generic value [gv] as a
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[nativeint]. Is invalid if [gv] has a bitwidth greater than
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[nativeint]. See the field [llvm::GenericValue::IntVal]. *)
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val as_nativeint : t -> nativeint
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(** [as_int64 gv] returns the integer-valued generic value [gv] as an [int64].
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Is invalid if [gv] has a bitwidth greater than [int64]. See the field
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[llvm::GenericValue::IntVal]. *)
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val as_int64 : t -> int64
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end
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module ExecutionEngine: sig
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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 t
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(** [create m] creates a new execution engine, taking ownership of the
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module [m] if successful. Creates a JIT if possible, else falls back to an
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interpreter. Raises [Error msg] if an error occurrs. The execution engine
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is not garbage collected and must be destroyed with [dispose ee].
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See the function [llvm::EngineBuilder::create]. *)
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val create : Llvm.llmodule -> t
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(** [create_interpreter m] creates a new interpreter, taking ownership of the
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module [m] if successful. Raises [Error msg] if an error occurrs. The
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execution engine is not garbage collected and must be destroyed with
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[dispose ee].
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See the function [llvm::EngineBuilder::create]. *)
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val create_interpreter : Llvm.llmodule -> t
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(** [create_jit m optlevel] creates a new JIT (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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See the function [llvm::EngineBuilder::create]. *)
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val create_jit : Llvm.llmodule -> int -> t
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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 : t -> 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 -> t -> unit
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(** [remove_module m ee] removes the module [m] from the execution engine
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[ee], disposing of [m] and the module referenced by [mp]. Raises
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[Error msg] if an error occurs. *)
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val remove_module : Llvm.llmodule -> t -> Llvm.llmodule
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(** [find_function n ee] finds the function named [n] defined in any of the
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modules owned by the execution engine [ee]. Returns [None] if the function
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is not found and [Some f] otherwise. *)
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val find_function : string -> t -> Llvm.llvalue option
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(** [run_function f args ee] synchronously executes the function [f] with the
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arguments [args], which must be compatible with the parameter types. *)
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val run_function : Llvm.llvalue -> GenericValue.t array -> t ->
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GenericValue.t
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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 : t -> 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 : t -> unit
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(** [run_function_as_main f args env ee] executes the function [f] as a main
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function, passing it [argv] and [argc] according to the string array
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[args], and [envp] as specified by the array [env]. Returns the integer
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return value of the function. *)
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val run_function_as_main : Llvm.llvalue -> string array ->
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(string * string) array -> t -> int
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(** [free_machine_code f ee] releases the memory in the execution engine [ee]
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used to store the machine code for the function [f]. *)
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val free_machine_code : Llvm.llvalue -> t -> unit
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(** [target_data ee] is the target data owned by the execution engine
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[ee]. *)
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val target_data : t -> Llvm_target.TargetData.t
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end
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val initialize_native_target : unit -> bool
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