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[OCaml] Expose LLVM's fatal error and stacktrace APIs

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194669 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Peter Zotov 2013-11-14 06:34:13 +00:00
parent 732cf2d598
commit a69773cead
3 changed files with 47 additions and 0 deletions
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7
bindings/ocaml/llvm/llvm.ml
View File

@ -280,6 +280,13 @@ exception IoError of string
external register_exns : exn -> unit = "llvm_register_core_exns"
let _ = register_exns (IoError "")
external install_fatal_error_handler : (string -> unit) -> unit
= "llvm_install_fatal_error_handler"
external reset_fatal_error_handler : unit -> unit
= "llvm_reset_fatal_error_handler"
external enable_pretty_stacktrace : unit -> unit
= "llvm_enable_pretty_stacktrace"
type ('a, 'b) llpos =
| At_end of 'a
| Before of 'b

15
bindings/ocaml/llvm/llvm.mli
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@ -361,6 +361,21 @@ type ('a, 'b) llrev_pos =
exception IoError of string
(** {6 Global configuration} *)
(** [enable_pretty_stacktraces ()] enables LLVM's built-in stack trace code.
This intercepts the OS's crash signals and prints which component of LLVM
you were in at the time of the crash. *)
val enable_pretty_stacktrace : unit -> unit
(** [install_fatal_error_handler f] installs [f] as LLVM's fatal error handler.
The handler will receive the reason for termination as a string. After
the handler has been executed, LLVM calls [exit(1)]. *)
val install_fatal_error_handler : (string -> unit) -> unit
(** [reset_fatal_error_handler ()] resets LLVM's fatal error handler. *)
val reset_fatal_error_handler : unit -> unit
(** {6 Contexts} *)
(** [create_context ()] creates a context for storing the "global" state in

25
bindings/ocaml/llvm/llvm_ocaml.c
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@ -33,6 +33,7 @@ static value llvm_ioerror_exn;
CAMLprim value llvm_register_core_exns(value IoError) {
llvm_ioerror_exn = Field(IoError, 0);
register_global_root(&llvm_ioerror_exn);
return Val_unit;
}
@ -50,6 +51,30 @@ static void llvm_raise(value Prototype, char *Message) {
#endif
}
static value llvm_fatal_error_handler;
static void llvm_fatal_error_trampoline(const char *Reason) {
callback(llvm_fatal_error_handler, copy_string(Reason));
}
CAMLprim value llvm_install_fatal_error_handler(value Handler) {
LLVMInstallFatalErrorHandler(llvm_fatal_error_trampoline);
llvm_fatal_error_handler = Handler;
caml_register_global_root(&llvm_fatal_error_handler);
return Val_unit;
}
CAMLprim value llvm_reset_fatal_error_handler(value Unit) {
caml_remove_global_root(&llvm_fatal_error_handler);
LLVMResetFatalErrorHandler();
return Val_unit;
}
CAMLprim value llvm_enable_pretty_stacktrace(value Unit) {
LLVMEnablePrettyStackTrace();
return Val_unit;
}
static value alloc_variant(int tag, void *Value) {
value Iter = alloc_small(1, tag);
Field(Iter, 0) = Val_op(Value);