1 /* ex - Exception Handling */
3 /* Copyright (c) 2005-2015. The SimGrid Team.
4 * All rights reserved. */
6 /* Copyright (c) 2002-2004 Ralf S. Engelschall <rse@engelschall.com> */
7 /* Copyright (c) 2002-2004 The OSSP Project <http://www.ossp.org/> */
8 /* Copyright (c) 2002-2004 Cable & Wireless <http://www.cw.com/> */
9 /* All rights reserved. */
11 /* This code is inspirated from the OSSP version (as retrieved back in 2004)*/
12 /* It was heavily modified to fit the SimGrid framework. */
14 /* The OSSP version has the following copyright notice:
15 ** OSSP ex - Exception Handling
16 ** Copyright (c) 2002-2004 Ralf S. Engelschall <rse@engelschall.com>
17 ** Copyright (c) 2002-2004 The OSSP Project <http://www.ossp.org/>
18 ** Copyright (c) 2002-2004 Cable & Wireless <http://www.cw.com/>
20 ** This file is part of OSSP ex, an exception handling library
21 ** which can be found at http://www.ossp.org/pkg/lib/ex/.
23 ** Permission to use, copy, modify, and distribute this software for
24 ** any purpose with or without fee is hereby granted, provided that
25 ** the above copyright notice and this permission notice appear in all
28 ** THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESSED OR IMPLIED
29 ** WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
30 ** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
31 ** IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
32 ** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
35 ** USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
36 ** ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
37 ** OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
38 ** OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 /* The extensions made for the SimGrid project can either be distributed */
43 /* under the same license, or under the LGPL v2.1 */
48 #include "src/internal_config.h" /* execinfo when available */
51 #include "xbt/synchro_core.h"
52 #include "src/xbt_modinter.h" /* backtrace initialization headers */
54 #include "src/xbt/ex_interface.h"
55 #include "simgrid/sg_config.h" /* Configuration mechanism of SimGrid */
57 #include "simgrid/simix.h" /* SIMIX_process_self_get_name() */
60 #if HAVE_EXECINFO_H && HAVE_POPEN && defined(ADDR2LINE)
61 # define HAVE_BACKTRACE 1 /* Hello linux box */
64 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_ex, xbt, "Exception mecanism");
66 XBT_EXPORT_NO_IMPORT(const xbt_running_ctx_t) __xbt_ex_ctx_initializer = XBT_RUNNING_CTX_INITIALIZER;
68 /* default __ex_ctx callback function */
69 xbt_running_ctx_t *__xbt_ex_ctx_default(void)
71 /* Don't scream: this is a default which is never used (so, yes,
72 there is one setjump container by running entity).
74 This default gets overriden in xbt/xbt_os_thread.c so that it works in
75 real life and in simulation when using threads to implement the simulation
76 processes (ie, with pthreads and on windows).
78 It also gets overriden in xbt/context.c when using ucontexts (as well as
79 in Java for now, but after the java overhaul, it will get cleaned out)
81 static xbt_running_ctx_t ctx = XBT_RUNNING_CTX_INITIALIZER;
86 /* Change raw libc symbols to file names and line numbers */
87 void xbt_ex_setup_backtrace(xbt_ex_t * e);
89 void xbt_backtrace_display(xbt_ex_t * e)
91 xbt_ex_setup_backtrace(e);
95 fprintf(stderr, "(backtrace not set)\n");
97 fprintf(stderr, "Backtrace (displayed in process %s):\n", SIMIX_process_self_get_name());
98 for (int i = 1; i < e->used; i++) /* no need to display "xbt_backtrace_display" */
99 fprintf(stderr, "---> %s\n", e->bt_strings[i] + 4);
102 /* don't fool xbt_ex_free with uninitialized msg field */
106 XBT_ERROR("No backtrace on this arch");
110 /** \brief show the backtrace of the current point (lovely while debuging) */
111 void xbt_backtrace_display_current(void)
114 xbt_backtrace_current(&e);
115 xbt_backtrace_display(&e);
118 #if HAVE_EXECINFO_H && HAVE_POPEN && defined(ADDR2LINE)
119 # include "src/xbt/backtrace_linux.c"
121 # include "src/xbt/backtrace_dummy.c"
124 /** @brief shows an exception content and the associated stack if available */
125 void xbt_ex_display(xbt_ex_t * e)
127 char *thrower = NULL;
128 if (e->pid != xbt_getpid())
129 thrower = bprintf(" on process %d",e->pid);
131 fprintf(stderr, "** SimGrid: UNCAUGHT EXCEPTION received on %s(%d): category: %s; value: %d\n"
133 "** Thrown by %s()%s\n",
134 xbt_binary_name, xbt_getpid(), xbt_ex_catname(e->category), e->value, e->msg,
135 e->procname, thrower ? thrower : " in this process");
136 XBT_CRITICAL("%s", e->msg);
139 if (xbt_initialized==0 || smx_cleaned) {
140 fprintf(stderr, "Ouch. SimGrid is not initialized yet, or already closing. No backtrace available.\n");
141 return; /* Not started yet or already closing. Trying to generate a backtrace would probably fail */
145 xbt_ex_setup_backtrace(e);
147 #ifdef HAVE_BACKTRACE
148 if (e->used && e->bt_strings) {
149 /* We have everything to build neat backtraces */
152 TRY { // We don't want to have an exception while checking how to deal with the one we already have, do we?
153 cutpath = xbt_cfg_get_boolean("exception/cutpath");
154 } CATCH_ANONYMOUS { }
156 fprintf(stderr, "\n");
157 for (i = 0; i < e->used; i++) {
160 char* p = e->bt_strings[i];
161 xbt_str_rtrim(p, ":0123456789");
162 char* filename = strrchr(p, '/')+1;
163 char* end_of_message = strrchr(p, ' ');
165 int length = strlen(p)-strlen(end_of_message);
166 char* dest = malloc(length);
168 memcpy(dest, &p[0], length);
171 fprintf(stderr, "%s %s\n", dest, filename);
176 fprintf(stderr, "%s\n", e->bt_strings[i]);
182 "** In %s() at %s:%d\n"
183 "** (no backtrace available)\n", e->func, e->file, e->line);
186 /* default __ex_terminate callback function */
187 void __xbt_ex_terminate_default(xbt_ex_t * e)
193 /* the externally visible API */
194 XBT_EXPORT_NO_IMPORT(xbt_running_ctx_fetcher_t) __xbt_running_ctx_fetch = &__xbt_ex_ctx_default;
195 XBT_EXPORT_NO_IMPORT(ex_term_cb_t) __xbt_ex_terminate = &__xbt_ex_terminate_default;
197 void xbt_ex_free(xbt_ex_t e)
202 for (int i = 0; i < e.used; i++)
203 free(e.bt_strings[i]);
208 /** \brief returns a short name for the given exception category */
209 const char *xbt_ex_catname(xbt_errcat_t cat)
213 return "unknown error";
215 return "invalid argument";
217 return "out of bounds";
220 case not_found_error:
223 return "system error";
225 return "network error";
229 return "action canceled";
231 return "thread error";
233 return "host failed";
235 return "tracing error";
241 return "INVALID ERROR";
248 XBT_TEST_SUITE("xbt_ex", "Exception Handling");
250 XBT_TEST_UNIT("controlflow", test_controlflow, "basic nested control flow")
255 xbt_test_add("basic nested control flow");
259 xbt_test_fail("M1: n=%d (!= 1)", n);
263 xbt_test_fail("M2: n=%d (!= 2)", n);
265 THROWF(unknown_error, 0, "something");
268 xbt_test_fail("M3: n=%d (!= 3)", n);
275 xbt_test_fail("M2: n=%d (!= 5)", n);
277 THROWF(unknown_error, 0, "something");
280 xbt_test_fail("M3: n=%d (!= 6)", n);
285 xbt_test_fail("MX: n=%d (shouldn't reach this point)", n);
288 xbt_test_fail("M4: n=%d (!= 7)", n);
293 xbt_test_fail("M5: n=%d (!= 8)", n);
296 XBT_TEST_UNIT("value", test_value, "exception value passing")
301 THROWF(unknown_error, 2, "toto");
303 xbt_test_add("exception value passing");
304 if (ex.category != unknown_error)
305 xbt_test_fail("category=%d (!= 1)", (int)ex.category);
307 xbt_test_fail("value=%d (!= 2)", ex.value);
308 if (strcmp(ex.msg, "toto"))
309 xbt_test_fail("message=%s (!= toto)", ex.msg);
314 XBT_TEST_UNIT("variables", test_variables, "variable value preservation")
318 int XBT_ATTRIB_UNUSED r2;
322 r1 = r2 = v1 = v2 = 1234;
326 THROWF(unknown_error, 0, "toto");
328 xbt_test_add("variable preservation");
330 xbt_test_fail("r1=%d (!= 1234)", r1);
332 xbt_test_fail("v1=%d (!= 1234)", v1);
333 /* r2 is allowed to be destroyed because not volatile */
335 xbt_test_fail("v2=%d (!= 5678)", v2);
340 XBT_TEST_UNIT("cleanup", test_cleanup, "cleanup handling")
346 xbt_test_add("cleanup handling");
352 THROWF(1, 2, "blah");
356 xbt_test_fail("v1 = %d (!= 5678)", v1);
360 xbt_test_fail("v1 = %d (!= 5678)", v1);
361 if (!(ex.category == 1 && ex.value == 2 && !strcmp(ex.msg, "blah")))
362 xbt_test_fail("unexpected exception contents");
366 xbt_test_fail("xbt_ex_free not executed");
370 * The following is the example included in the documentation. It's a good
371 * idea to check its syntax even if we don't try to run it.
372 * And actually, it allows to put comments in the code despite doxygen.
374 static char *mallocex(int size)
379 #define SMALLAMOUNT 10
380 #define TOOBIG 100000000
386 static void good_example(void)
388 global_context_t *global_context = xbt_malloc(sizeof(global_context_t));
392 char *volatile /*03 */ cp1 = NULL /*02 */ ;
393 char *volatile /*03 */ cp2 = NULL /*02 */ ;
394 char *volatile /*03 */ cp3 = NULL /*02 */ ;
396 cp1 = mallocex(SMALLAMOUNT);
397 global_context->first = cp1;
398 cp1 = NULL /*05 give away */ ;
399 cp2 = mallocex(TOOBIG);
400 cp3 = mallocex(SMALLAMOUNT);
404 TRY_CLEANUP { /*04 */
405 printf("cp3=%s", cp3 == NULL /*02 */ ? "" : cp3);
408 /*05 cp1 was given away */
411 /*05 global context untouched */
415 /* end_of_good_example */
417 #endif /* SIMGRID_TEST */