2 ** OSSP ex - Exception Handling (modified to fit into SimGrid)
3 ** Copyright (c) 2005 Martin Quinson
4 ** Copyright (c) 2002-2004 Ralf S. Engelschall <rse@engelschall.com>
5 ** Copyright (c) 2002-2004 The OSSP Project <http://www.ossp.org/>
6 ** Copyright (c) 2002-2004 Cable & Wireless <http://www.cw.com/>
8 ** This file is part of OSSP ex, an exception handling library
9 ** which can be found at http://www.ossp.org/pkg/lib/ex/.
11 ** Permission to use, copy, modify, and distribute this software for
12 ** any purpose with or without fee is hereby granted, provided that
13 ** the above copyright notice and this permission notice appear in all
16 ** THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
17 ** WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 ** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 ** IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
20 ** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 ** USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 ** ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 ** OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 ** OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 ** ex.c: exception handling (compiler part)
35 #include "portable.h" /* execinfo when available */
38 /* default __ex_ctx callback function */
39 ex_ctx_t *__xbt_ex_ctx_default(void) {
40 static ex_ctx_t ctx = XBT_CTX_INITIALIZER;
45 /** @brief shows an exception content and the associated stack if available */
46 void xbt_ex_display(xbt_ex_t *e) {
49 "** SimGrid: UNCAUGHT EXCEPTION: category: %s; value: %d\n"
51 "** Thrown by %s%s%s at %s:%d:%s\n",
52 xbt_ex_catname(e->category), e->value, e->msg,
53 e->procname, (e->host?"@":""),(e->host?e->host:"localhost"),
54 e->file,e->line,e->func);
56 #ifdef HAVE_EXECINFO_H
61 fprintf(stderr,"** Backtrace:\n");
62 strings = backtrace_symbols (e->bt, e->used);
64 for (i = 0; i < e->used; i++)
65 printf (" %s\n", strings[i]);
73 /* default __ex_terminate callback function */
74 void __xbt_ex_terminate_default(xbt_ex_t *e) {
80 /* the externally visible API */
81 ex_ctx_cb_t __xbt_ex_ctx = &__xbt_ex_ctx_default;
82 ex_term_cb_t __xbt_ex_terminate = &__xbt_ex_terminate_default;
84 void xbt_ex_free(xbt_ex_t e) {
85 if (e.msg) free(e.msg);
89 /** \brief returns a short name for the given exception category */
90 const char * xbt_ex_catname(xbt_errcat_t cat) {
92 case unknown_error: return "unknown_err";
93 case arg_error: return "invalid_arg";
94 case mismatch_error: return "mismatch";
95 case not_found_error: return "not found";
96 case system_error: return "system_err";
97 case network_error: return "network_err";
98 case timeout_error: return "timeout";
99 case thread_error: return "thread_err";
100 default: return "INVALID_ERR";
104 #ifndef HAVE_EXECINFO_H
105 /* dummy implementation. We won't use the result, but ex.h needs it to be defined */
106 int backtrace (void **__array, int __size) {
115 XBT_TEST_SUITE("xbt_ex","Exception Handling");
117 XBT_TEST_UNIT("controlflow",test_controlflow, "basic nested control flow") {
121 xbt_test_add0("basic nested control flow");
125 xbt_test_fail1("M1: n=%d (!= 1)", n);
129 xbt_test_fail1("M2: n=%d (!= 2)", n);
131 THROW0(unknown_error,0,"something");
134 xbt_test_fail1("M3: n=%d (!= 1)", n);
138 xbt_test_fail1("MX: n=%d (shouldn't reach this point)", n);
142 xbt_test_fail1("M4: n=%d (!= 4)", n);
147 xbt_test_fail1("M5: n=%d (!= 5)", n);
150 XBT_TEST_UNIT("value",test_value,"exception value passing") {
154 THROW0(unknown_error, 2, "toto");
156 xbt_test_add0("exception value passing");
157 if (ex.category != unknown_error)
158 xbt_test_fail1("category=%d (!= 1)", ex.category);
160 xbt_test_fail1("value=%d (!= 2)", ex.value);
161 if (strcmp(ex.msg,"toto"))
162 xbt_test_fail1("message=%s (!= toto)", ex.msg);
167 XBT_TEST_UNIT("variables",test_variables,"variable value preservation") {
172 r1 = r2 = v1 = v2 = 1234;
176 THROW0(unknown_error, 0, "toto");
178 xbt_test_add0("variable preservation");
180 xbt_test_fail1("r1=%d (!= 1234)", r1);
182 xbt_test_fail1("v1=%d (!= 1234)", v1);
183 /* r2 is allowed to be destroyed because not volatile */
185 xbt_test_fail1("v2=%d (!= 5678)", v2);
190 XBT_TEST_UNIT("cleanup",test_cleanup,"cleanup handling") {
195 xbt_test_add0("cleanup handling");
201 THROW0(1, 2, "blah");
204 xbt_test_fail1("v1 = %d (!= 5678)", v1);
208 xbt_test_fail1("v1 = %d (!= 5678)", v1);
209 if (!(ex.category == 1 && ex.value == 2 && !strcmp(ex.msg,"blah")))
210 xbt_test_fail0("unexpected exception contents");
214 xbt_test_fail0("xbt_ex_free not executed");
219 * The following is the example included in the documentation. It's a good
220 * idea to check its syntax even if we don't try to run it.
221 * And actually, it allows to put comments in the code despite doxygen.
223 static char *mallocex(int size) {
226 #define SMALLAMOUNT 10
227 #define TOOBIG 100000000
229 #if 0 /* this contains syntax errors, actually */
230 static void bad_example(void) {
231 struct {char*first;} *globalcontext;
236 char *cp1, *cp2, *cp3;
238 cp1 = mallocex(SMALLAMOUNT);
239 globalcontext->first = cp1;
240 cp2 = mallocex(TOOBIG);
241 cp3 = mallocex(SMALLAMOUNT);
245 if (cp3 != NULL) free(cp3);
246 if (cp2 != NULL) free(cp2);
247 if (cp1 != NULL) free(cp1);
249 printf("cp3=%s", cp3);
252 /* end_of_bad_example */
256 static void good_example(void) {
257 struct {char*first;} *globalcontext;
262 char * volatile /*03*/ cp1 = NULL /*02*/;
263 char * volatile /*03*/ cp2 = NULL /*02*/;
264 char * volatile /*03*/ cp3 = NULL /*02*/;
266 cp1 = mallocex(SMALLAMOUNT);
267 globalcontext->first = cp1;
268 cp1 = NULL /*05 give away*/;
269 cp2 = mallocex(TOOBIG);
270 cp3 = mallocex(SMALLAMOUNT);
274 printf("cp3=%s", cp3 == NULL /*02*/ ? "" : cp3);
279 /*05 cp1 was given away */
281 /*05 global context untouched */
285 /* end_of_good_example */
287 #endif /* SIMGRID_TEST */