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/***********************************************************************/
/* */
/* Objective Caml */
/* */
/* 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 Library General Public License, with */
/* the special exception on linking described in file ../LICENSE. */
/* */
/***********************************************************************/
/* $Id$ */
/* Print an uncaught exception and abort */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "backtrace.h"
#include "callback.h"
#include "debugger.h"
#include "fail.h"
#include "misc.h"
#include "mlvalues.h"
#include "printexc.h"
struct stringbuf {
char * ptr;
char * end;
char data[256];
};
static void add_char(struct stringbuf *buf, char c)
{
if (buf->ptr < buf->end) *(buf->ptr++) = c;
}
static void add_string(struct stringbuf *buf, char *s)
{
int len = strlen(s);
if (buf->ptr + len > buf->end) len = buf->end - buf->ptr;
if (len > 0) memmove(buf->ptr, s, len);
buf->ptr += len;
}
CAMLexport char * caml_format_exception(value exn)
{
mlsize_t start, i;
value bucket, v;
struct stringbuf buf;
char intbuf[64];
char * res;
buf.ptr = buf.data;
buf.end = buf.data + sizeof(buf.data) - 1;
add_string(&buf, String_val(Field(Field(exn, 0), 0)));
if (Wosize_val(exn) >= 2) {
/* Check for exceptions in the style of Match_failure and Assert_failure */
if (Wosize_val(exn) == 2 &&
Is_block(Field(exn, 1)) &&
Tag_val(Field(exn, 1)) == 0) {
bucket = Field(exn, 1);
start = 0;
} else {
bucket = exn;
start = 1;
}
add_char(&buf, '(');
for (i = start; i < Wosize_val(bucket); i++) {
if (i > start) add_string(&buf, ", ");
v = Field(bucket, i);
if (Is_long(v)) {
sprintf(intbuf, "%ld", Long_val(v));
add_string(&buf, intbuf);
} else if (Tag_val(v) == String_tag) {
add_char(&buf, '"');
add_string(&buf, String_val(v));
add_char(&buf, '"');
} else {
add_char(&buf, '_');
}
}
add_char(&buf, ')');
}
*buf.ptr = 0; /* Terminate string */
i = buf.ptr - buf.data + 1;
res = malloc(i);
if (res == NULL) return NULL;
memmove(res, buf.data, i);
return res;
}
void caml_fatal_uncaught_exception(value exn)
{
char * msg;
value * at_exit;
int saved_backtrace_active, saved_backtrace_pos;
/* Build a string representation of the exception */
msg = caml_format_exception(exn);
/* Perform "at_exit" processing, ignoring all exceptions that may
be triggered by this */
saved_backtrace_active = caml_backtrace_active;
saved_backtrace_pos = caml_backtrace_pos;
caml_backtrace_active = 0;
at_exit = caml_named_value("Pervasives.do_at_exit");
if (at_exit != NULL) caml_callback_exn(*at_exit, Val_unit);
caml_backtrace_active = saved_backtrace_active;
caml_backtrace_pos = saved_backtrace_pos;
/* Display the uncaught exception */
fprintf(stderr, "Fatal error: exception %s\n", msg);
free(msg);
/* Display the backtrace if available */
if (caml_backtrace_active
#ifndef NATIVE_CODE
&& !caml_debugger_in_use
#endif
) {
caml_print_exception_backtrace();
}
/* Terminate the process */
exit(2);
}
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