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/portable.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 defined(HAVE_EXECINFO_H) && defined(HAVE_POPEN) && defined(ADDR2LINE)
61 # define HAVE_BACKTRACE 1 /* Hello linux box */
64 #if defined(_WIN32) && defined(_M_IX86) && !defined(__GNUC__)
65 # define HAVE_BACKTRACE 1 /* Hello x86 windows box */
69 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_ex, xbt, "Exception mecanism");
71 XBT_EXPORT_NO_IMPORT(const xbt_running_ctx_t) __xbt_ex_ctx_initializer = XBT_RUNNING_CTX_INITIALIZER;
73 /* default __ex_ctx callback function */
74 xbt_running_ctx_t *__xbt_ex_ctx_default(void)
76 /* Don't scream: this is a default which is never used (so, yes,
77 there is one setjump container by running entity).
79 This default gets overriden in xbt/xbt_os_thread.c so that it works in
80 real life and in simulation when using threads to implement the simulation
81 processes (ie, with pthreads and on windows).
83 It also gets overriden in xbt/context.c when using ucontexts (as well as
84 in Java for now, but after the java overhaul, it will get cleaned out)
86 static xbt_running_ctx_t ctx = XBT_RUNNING_CTX_INITIALIZER;
91 /* Change raw libc symbols to file names and line numbers */
92 void xbt_ex_setup_backtrace(xbt_ex_t * e);
94 void xbt_backtrace_display(xbt_ex_t * e)
96 xbt_ex_setup_backtrace(e);
100 fprintf(stderr, "(backtrace not set)\n");
102 fprintf(stderr, "Backtrace (displayed in process %s):\n", SIMIX_process_self_get_name());
103 for (int i = 1; i < e->used; i++) /* no need to display "xbt_backtrace_display" */
104 fprintf(stderr, "---> %s\n", e->bt_strings[i] + 4);
107 /* don't fool xbt_ex_free with uninitialized msg field */
111 XBT_ERROR("No backtrace on this arch");
115 /** \brief show the backtrace of the current point (lovely while debuging) */
116 void xbt_backtrace_display_current(void)
119 xbt_backtrace_current(&e);
120 xbt_backtrace_display(&e);
123 #if defined(HAVE_EXECINFO_H) && defined(HAVE_POPEN) && defined(ADDR2LINE)
124 # include "src/xbt/backtrace_linux.c"
125 #elif (defined(_WIN32) && defined (_M_IX86)) && !defined(__GNUC__)
126 # include "src/xbt/backtrace_windows.c"
128 # include "src/xbt/backtrace_dummy.c"
131 /** @brief shows an exception content and the associated stack if available */
132 void xbt_ex_display(xbt_ex_t * e)
134 char *thrower = NULL;
135 if (e->pid != xbt_getpid())
136 thrower = bprintf(" on process %d",e->pid);
139 "** SimGrid: UNCAUGHT EXCEPTION received on %s(%d): category: %s; value: %d\n"
141 "** Thrown by %s()%s\n",
142 xbt_binary_name, xbt_getpid(),
143 xbt_ex_catname(e->category), e->value, e->msg,
144 e->procname, thrower ? thrower : " in this process");
145 XBT_CRITICAL("%s", e->msg);
148 if (xbt_initialized==0 || smx_cleaned) {
149 fprintf(stderr, "Ouch. SimGrid is not initialized yet, or already closing. No backtrace available.\n");
150 return; /* Not started yet or already closing. Trying to generate a backtrace would probably fail */
154 xbt_ex_setup_backtrace(e);
156 #ifdef HAVE_BACKTRACE
157 if (e->used && e->bt_strings) {
158 /* We have everything to build neat backtraces */
161 TRY { // We don't want to have an exception while checking how to deal with the one we already have, do we?
162 cutpath = sg_cfg_get_boolean("exception/cutpath");
163 } CATCH_ANONYMOUS { }
165 fprintf(stderr, "\n");
166 for (i = 0; i < e->used; i++) {
169 char* p = e->bt_strings[i];
170 xbt_str_rtrim(p, ":0123456789");
171 char* filename = strrchr(p, '/')+1;
172 char* end_of_message = strrchr(p, ' ');
174 int length = strlen(p)-strlen(end_of_message);
175 char* dest = malloc(length);
177 memcpy(dest, &p[0], length);
180 fprintf(stderr, "%s %s\n", dest, filename);
185 fprintf(stderr, "%s\n", e->bt_strings[i]);
192 "** In %s() at %s:%d\n"
193 "** (no backtrace available)\n", e->func, e->file, e->line);
197 /* default __ex_terminate callback function */
198 void __xbt_ex_terminate_default(xbt_ex_t * e)
204 /* the externally visible API */
205 XBT_EXPORT_NO_IMPORT(xbt_running_ctx_fetcher_t) __xbt_running_ctx_fetch = &__xbt_ex_ctx_default;
206 XBT_EXPORT_NO_IMPORT(ex_term_cb_t) __xbt_ex_terminate = &__xbt_ex_terminate_default;
209 void xbt_ex_free(xbt_ex_t e)
214 for (int i = 0; i < e.used; i++)
215 free(e.bt_strings[i]);
220 /** \brief returns a short name for the given exception category */
221 const char *xbt_ex_catname(xbt_errcat_t cat)
225 return "unknown error";
227 return "invalid argument";
229 return "out of bounds";
232 case not_found_error:
235 return "system error";
237 return "network error";
241 return "action canceled";
243 return "thread error";
245 return "host failed";
247 return "tracing error";
254 return "INVALID ERROR";
262 XBT_TEST_SUITE("xbt_ex", "Exception Handling");
264 XBT_TEST_UNIT("controlflow", test_controlflow, "basic nested control flow")
269 xbt_test_add("basic nested control flow");
273 xbt_test_fail("M1: n=%d (!= 1)", n);
277 xbt_test_fail("M2: n=%d (!= 2)", n);
279 THROWF(unknown_error, 0, "something");
283 xbt_test_fail("M3: n=%d (!= 3)", n);
290 xbt_test_fail("M2: n=%d (!= 5)", n);
292 THROWF(unknown_error, 0, "something");
296 xbt_test_fail("M3: n=%d (!= 6)", n);
301 xbt_test_fail("MX: n=%d (shouldn't reach this point)", n);
305 xbt_test_fail("M4: n=%d (!= 7)", n);
310 xbt_test_fail("M5: n=%d (!= 8)", n);
313 XBT_TEST_UNIT("value", test_value, "exception value passing")
318 THROWF(unknown_error, 2, "toto");
321 xbt_test_add("exception value passing");
322 if (ex.category != unknown_error)
323 xbt_test_fail("category=%d (!= 1)", (int)ex.category);
325 xbt_test_fail("value=%d (!= 2)", ex.value);
326 if (strcmp(ex.msg, "toto"))
327 xbt_test_fail("message=%s (!= toto)", ex.msg);
332 XBT_TEST_UNIT("variables", test_variables, "variable value preservation")
336 int XBT_ATTRIB_UNUSED r2;
340 r1 = r2 = v1 = v2 = 1234;
344 THROWF(unknown_error, 0, "toto");
347 xbt_test_add("variable preservation");
349 xbt_test_fail("r1=%d (!= 1234)", r1);
351 xbt_test_fail("v1=%d (!= 1234)", v1);
352 /* r2 is allowed to be destroyed because not volatile */
354 xbt_test_fail("v2=%d (!= 5678)", v2);
359 XBT_TEST_UNIT("cleanup", test_cleanup, "cleanup handling")
365 xbt_test_add("cleanup handling");
371 THROWF(1, 2, "blah");
375 xbt_test_fail("v1 = %d (!= 5678)", v1);
380 xbt_test_fail("v1 = %d (!= 5678)", v1);
381 if (!(ex.category == 1 && ex.value == 2 && !strcmp(ex.msg, "blah")))
382 xbt_test_fail("unexpected exception contents");
386 xbt_test_fail("xbt_ex_free not executed");
391 * The following is the example included in the documentation. It's a good
392 * idea to check its syntax even if we don't try to run it.
393 * And actually, it allows to put comments in the code despite doxygen.
395 static char *mallocex(int size)
400 #define SMALLAMOUNT 10
401 #define TOOBIG 100000000
407 static void good_example(void)
409 global_context_t *global_context = xbt_malloc(sizeof(global_context_t));
413 char *volatile /*03 */ cp1 = NULL /*02 */ ;
414 char *volatile /*03 */ cp2 = NULL /*02 */ ;
415 char *volatile /*03 */ cp3 = NULL /*02 */ ;
417 cp1 = mallocex(SMALLAMOUNT);
418 global_context->first = cp1;
419 cp1 = NULL /*05 give away */ ;
420 cp2 = mallocex(TOOBIG);
421 cp3 = mallocex(SMALLAMOUNT);
425 TRY_CLEANUP { /*04 */
426 printf("cp3=%s", cp3 == NULL /*02 */ ? "" : cp3);
429 /*05 cp1 was given away */
432 /*05 global context untouched */
436 /* end_of_good_example */
438 #endif /* SIMGRID_TEST */