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/**************************************************************************/
/* */
/* OCaml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* en Automatique. */
/* */
/* All rights reserved. This file is distributed under the terms of */
/* the GNU Lesser General Public License version 2.1, with the */
/* special exception on linking described in the file LICENSE. */
/* */
/**************************************************************************/
#define CAML_INTERNALS
/* Raising exceptions from C. */
#include <stdio.h>
#include <signal.h>
#include "caml/alloc.h"
#include "caml/fail.h"
#include "caml/io.h"
#include "caml/gc.h"
#include "caml/memory.h"
#include "caml/mlvalues.h"
#include "caml/printexc.h"
#include "caml/signals.h"
#include "caml/stack.h"
#include "caml/roots.h"
#include "caml/callback.h"
/* The globals holding predefined exceptions */
typedef value caml_generated_constant[1];
extern caml_generated_constant
caml_exn_Out_of_memory,
caml_exn_Sys_error,
caml_exn_Failure,
caml_exn_Invalid_argument,
caml_exn_End_of_file,
caml_exn_Division_by_zero,
caml_exn_Not_found,
caml_exn_Match_failure,
caml_exn_Sys_blocked_io,
caml_exn_Stack_overflow,
caml_exn_Assert_failure,
caml_exn_Undefined_recursive_module;
/* Exception raising */
CAMLnoreturn_start
extern void caml_raise_exception (value bucket)
CAMLnoreturn_end;
char * caml_exception_pointer = NULL;
void caml_raise(value v)
{
Unlock_exn();
if (caml_exception_pointer == NULL) caml_fatal_uncaught_exception(v);
#ifndef Stack_grows_upwards
#define PUSHED_AFTER <
#else
#define PUSHED_AFTER >
#endif
while (caml_local_roots != NULL &&
(char *) caml_local_roots PUSHED_AFTER caml_exception_pointer) {
caml_local_roots = caml_local_roots->next;
}
#undef PUSHED_AFTER
caml_raise_exception(v);
}
void caml_raise_constant(value tag)
{
caml_raise(tag);
}
void caml_raise_with_arg(value tag, value arg)
{
CAMLparam2 (tag, arg);
CAMLlocal1 (bucket);
bucket = caml_alloc_small (2, 0);
Field(bucket, 0) = tag;
Field(bucket, 1) = arg;
caml_raise(bucket);
CAMLnoreturn;
}
void caml_raise_with_args(value tag, int nargs, value args[])
{
CAMLparam1 (tag);
CAMLxparamN (args, nargs);
value bucket;
int i;
Assert(1 + nargs <= Max_young_wosize);
bucket = caml_alloc_small (1 + nargs, 0);
Field(bucket, 0) = tag;
for (i = 0; i < nargs; i++) Field(bucket, 1 + i) = args[i];
caml_raise(bucket);
CAMLnoreturn;
}
void caml_raise_with_string(value tag, char const *msg)
{
CAMLparam1(tag);
value v_msg = caml_copy_string(msg);
caml_raise_with_arg(tag, v_msg);
CAMLnoreturn;
}
void caml_failwith (char const *msg)
{
caml_raise_with_string((value) caml_exn_Failure, msg);
}
void caml_failwith_value (value msg)
{
caml_raise_with_arg((value) caml_exn_Failure, msg);
}
void caml_invalid_argument (char const *msg)
{
caml_raise_with_string((value) caml_exn_Invalid_argument, msg);
}
void caml_invalid_argument_value (value msg)
{
caml_raise_with_arg((value) caml_exn_Invalid_argument, msg);
}
void caml_raise_out_of_memory(void)
{
caml_raise_constant((value) caml_exn_Out_of_memory);
}
void caml_raise_stack_overflow(void)
{
caml_raise_constant((value) caml_exn_Stack_overflow);
}
void caml_raise_sys_error(value msg)
{
caml_raise_with_arg((value) caml_exn_Sys_error, msg);
}
void caml_raise_end_of_file(void)
{
caml_raise_constant((value) caml_exn_End_of_file);
}
void caml_raise_zero_divide(void)
{
caml_raise_constant((value) caml_exn_Division_by_zero);
}
void caml_raise_not_found(void)
{
caml_raise_constant((value) caml_exn_Not_found);
}
void caml_raise_sys_blocked_io(void)
{
caml_raise_constant((value) caml_exn_Sys_blocked_io);
}
/* We use a pre-allocated exception because we can't
do a GC before the exception is raised (lack of stack descriptors
for the ccall to [caml_array_bound_error]). */
static value * caml_array_bound_error_exn = NULL;
void caml_array_bound_error(void)
{
if (caml_array_bound_error_exn == NULL) {
caml_array_bound_error_exn =
caml_named_value("Pervasives.array_bound_error");
if (caml_array_bound_error_exn == NULL) {
fprintf(stderr, "Fatal error: exception "
"Invalid_argument(\"index out of bounds\")\n");
exit(2);
}
}
caml_raise(*caml_array_bound_error_exn);
}
int caml_is_special_exception(value exn) {
return exn == (value) caml_exn_Match_failure
|| exn == (value) caml_exn_Assert_failure
|| exn == (value) caml_exn_Undefined_recursive_module;
}
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