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Diffstat (limited to 'test/monniaux/ocaml/byterun/fail.c')
| -rw-r--r-- | test/monniaux/ocaml/byterun/fail.c | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/test/monniaux/ocaml/byterun/fail.c b/test/monniaux/ocaml/byterun/fail.c new file mode 100644 index 00000000..6b4dee5f --- /dev/null +++ b/test/monniaux/ocaml/byterun/fail.c @@ -0,0 +1,204 @@ +/**************************************************************************/ +/* */ +/* 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 <stdlib.h> +#include "caml/alloc.h" +#include "caml/fail.h" +#include "caml/io.h" +#include "caml/gc.h" +#include "caml/memory.h" +#include "caml/misc.h" +#include "caml/mlvalues.h" +#include "caml/printexc.h" +#include "caml/signals.h" +#include "caml/stacks.h" + +CAMLexport struct longjmp_buffer * caml_external_raise = NULL; +value caml_exn_bucket; + +CAMLexport void caml_raise(value v) +{ + Unlock_exn(); + caml_exn_bucket = v; + if (caml_external_raise == NULL) caml_fatal_uncaught_exception(v); + siglongjmp(caml_external_raise->buf, 1); +} + +CAMLexport void caml_raise_constant(value tag) +{ + caml_raise(tag); +} + +CAMLexport 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; +} + +CAMLexport void caml_raise_with_args(value tag, int nargs, value args[]) +{ + CAMLparam1 (tag); + CAMLxparamN (args, nargs); + value bucket; + int i; + + CAMLassert(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; +} + +CAMLexport 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; +} + +/* PR#5115: Built-in exceptions can be triggered by input_value + while reading the initial value of [caml_global_data]. + + We check against this issue here in byterun/fail.c instead of + byterun/intern.c. Having the check here means that these calls will + be slightly slower for all bytecode programs (not just the calls + coming from intern). Because intern.c is shared between byterun/ + and asmrun/, putting checks there would slow do input_value for + natively-compiled programs that do not need these checks. +*/ +static void check_global_data(char const *exception_name) +{ + if (caml_global_data == 0) { + fprintf(stderr, "Fatal error: exception %s\n", exception_name); + exit(2); + } +} + +static void check_global_data_param(char const *exception_name, char const *msg) +{ + if (caml_global_data == 0) { + fprintf(stderr, "Fatal error: exception %s(\"%s\")\n", exception_name, msg); + exit(2); + } +} + +static inline value caml_get_failwith_tag (char const *msg) +{ + check_global_data_param("Failure", msg); + return Field(caml_global_data, FAILURE_EXN); +} + +CAMLexport void caml_failwith (char const *msg) +{ + caml_raise_with_string(caml_get_failwith_tag(msg), msg); +} + +CAMLexport void caml_failwith_value (value msg) +{ + CAMLparam1(msg); + value tag = caml_get_failwith_tag(String_val(msg)); + caml_raise_with_arg(tag, msg); + CAMLnoreturn; +} + +static inline value caml_get_invalid_argument_tag (char const *msg) +{ + check_global_data_param("Invalid_argument", msg); + return Field(caml_global_data, INVALID_EXN); +} + +CAMLexport void caml_invalid_argument (char const *msg) +{ + caml_raise_with_string(caml_get_invalid_argument_tag(msg), msg); +} + +CAMLexport void caml_invalid_argument_value (value msg) +{ + CAMLparam1(msg); + value tag = caml_get_invalid_argument_tag(String_val(msg)); + caml_raise_with_arg(tag, msg); + CAMLnoreturn; +} + +CAMLexport void caml_array_bound_error(void) +{ + caml_invalid_argument("index out of bounds"); +} + +CAMLexport void caml_raise_out_of_memory(void) +{ + check_global_data("Out_of_memory"); + caml_raise_constant(Field(caml_global_data, OUT_OF_MEMORY_EXN)); +} + +CAMLexport void caml_raise_stack_overflow(void) +{ + check_global_data("Stack_overflow"); + caml_raise_constant(Field(caml_global_data, STACK_OVERFLOW_EXN)); +} + +CAMLexport void caml_raise_sys_error(value msg) +{ + check_global_data_param("Sys_error", String_val(msg)); + caml_raise_with_arg(Field(caml_global_data, SYS_ERROR_EXN), msg); +} + +CAMLexport void caml_raise_end_of_file(void) +{ + check_global_data("End_of_file"); + caml_raise_constant(Field(caml_global_data, END_OF_FILE_EXN)); +} + +CAMLexport void caml_raise_zero_divide(void) +{ + check_global_data("Division_by_zero"); + caml_raise_constant(Field(caml_global_data, ZERO_DIVIDE_EXN)); +} + +CAMLexport void caml_raise_not_found(void) +{ + check_global_data("Not_found"); + caml_raise_constant(Field(caml_global_data, NOT_FOUND_EXN)); +} + +CAMLexport void caml_raise_sys_blocked_io(void) +{ + check_global_data("Sys_blocked_io"); + caml_raise_constant(Field(caml_global_data, SYS_BLOCKED_IO)); +} + +int caml_is_special_exception(value exn) { + /* this function is only used in caml_format_exception to produce + a more readable textual representation of some exceptions. It is + better to fall back to the general, less readable representation + than to abort with a fatal error as above. */ + if (caml_global_data == 0) return 0; + return exn == Field(caml_global_data, MATCH_FAILURE_EXN) + || exn == Field(caml_global_data, ASSERT_FAILURE_EXN) + || exn == Field(caml_global_data, UNDEFINED_RECURSIVE_MODULE_EXN); +} |