X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/f3ef4ce507d9aa7d12da1d22373bf0bd052eb543..aecc62c76f48c4d984e4e7924a21d3d7893de589:/src/xbt/ex.c diff --git a/src/xbt/ex.c b/src/xbt/ex.c index af1e4a6838..8be446d5e3 100644 --- a/src/xbt/ex.c +++ b/src/xbt/ex.c @@ -31,8 +31,8 @@ #include #include -#include +#include "portable.h" /* execinfo when available */ #include "xbt/ex.h" /* default __ex_ctx callback function */ @@ -42,10 +42,8 @@ ex_ctx_t *__xbt_ex_ctx_default(void) { return &ctx; } -/* default __ex_terminate callback function */ -void __xbt_ex_terminate_default(xbt_ex_t *e) { - char **strings; - size_t i; +/** @brief shows an exception content and the associated stack if available */ +void xbt_ex_display(xbt_ex_t *e) { fprintf(stderr, "** SimGrid: UNCAUGHT EXCEPTION: category: %s; value: %d\n" @@ -55,6 +53,11 @@ void __xbt_ex_terminate_default(xbt_ex_t *e) { e->procname, (e->host?"@":""),(e->host?e->host:"localhost"), e->file,e->line,e->func); +#ifdef HAVE_EXECINFO_H + { + char **strings; + int i; + fprintf(stderr,"** Backtrace:\n"); strings = backtrace_symbols (e->bt, e->used); @@ -62,6 +65,15 @@ void __xbt_ex_terminate_default(xbt_ex_t *e) { printf (" %s\n", strings[i]); free (strings); + } +#endif +} + + +/* default __ex_terminate callback function */ +void __xbt_ex_terminate_default(xbt_ex_t *e) { + xbt_ex_display(e); + abort(); } @@ -70,7 +82,7 @@ ex_ctx_cb_t __xbt_ex_ctx = &__xbt_ex_ctx_default; ex_term_cb_t __xbt_ex_terminate = &__xbt_ex_terminate_default; void xbt_ex_free(xbt_ex_t e) { - free(e.msg); + if (e.msg) free(e.msg); free(e.procname); } @@ -88,3 +100,188 @@ const char * xbt_ex_catname(xbt_errcat_t cat) { default: return "INVALID_ERR"; } } + +#ifndef HAVE_EXECINFO_H +/* dummy implementation. We won't use the result, but ex.h needs it to be defined */ +int backtrace (void **__array, int __size) { + return 0; +} + +#endif + +#ifdef SIMGRID_TEST +#include "xbt/ex.h" + +XBT_TEST_SUITE("xbt_ex","Exception Handling"); + +XBT_TEST_UNIT("controlflow",test_controlflow, "basic nested control flow") { + xbt_ex_t ex; + volatile int n=1; + + xbt_test_add0("basic nested control flow"); + + TRY { + if (n != 1) + xbt_test_fail1("M1: n=%d (!= 1)", n); + n++; + TRY { + if (n != 2) + xbt_test_fail1("M2: n=%d (!= 2)", n); + n++; + THROW0(unknown_error,0,"something"); + } CATCH (ex) { + if (n != 3) + xbt_test_fail1("M3: n=%d (!= 1)", n); + n++; + RETHROW; + } + xbt_test_fail1("MX: n=%d (shouldn't reach this point)", n); + } + CATCH(ex) { + if (n != 4) + xbt_test_fail1("M4: n=%d (!= 4)", n); + n++; + xbt_ex_free(ex); + } + if (n != 5) + xbt_test_fail1("M5: n=%d (!= 5)", n); +} + +XBT_TEST_UNIT("value",test_value,"exception value passing") { + xbt_ex_t ex; + + TRY { + THROW0(unknown_error, 2, "toto"); + } CATCH(ex) { + xbt_test_add0("exception value passing"); + if (ex.category != unknown_error) + xbt_test_fail1("category=%d (!= 1)", ex.category); + if (ex.value != 2) + xbt_test_fail1("value=%d (!= 2)", ex.value); + if (strcmp(ex.msg,"toto")) + xbt_test_fail1("message=%s (!= toto)", ex.msg); + xbt_ex_free(ex); + } +} + +XBT_TEST_UNIT("variables",test_variables,"variable value preservation") { + xbt_ex_t ex; + int r1, r2; + volatile int v1, v2; + + r1 = r2 = v1 = v2 = 1234; + TRY { + r2 = 5678; + v2 = 5678; + THROW0(unknown_error, 0, "toto"); + } CATCH(ex) { + xbt_test_add0("variable preservation"); + if (r1 != 1234) + xbt_test_fail1("r1=%d (!= 1234)", r1); + if (v1 != 1234) + xbt_test_fail1("v1=%d (!= 1234)", v1); + /* r2 is allowed to be destroyed because not volatile */ + if (v2 != 5678) + xbt_test_fail1("v2=%d (!= 5678)", v2); + xbt_ex_free(ex); + } +} + +XBT_TEST_UNIT("cleanup",test_cleanup,"cleanup handling") { + xbt_ex_t ex; + volatile int v1; + int c; + + xbt_test_add0("cleanup handling"); + + v1 = 1234; + c = 0; + TRY { + v1 = 5678; + THROW0(1, 2, "blah"); + } CLEANUP { + if (v1 != 5678) + xbt_test_fail1("v1 = %d (!= 5678)", v1); + c = 1; + } CATCH(ex) { + if (v1 != 5678) + xbt_test_fail1("v1 = %d (!= 5678)", v1); + if (!(ex.category == 1 && ex.value == 2 && !strcmp(ex.msg,"blah"))) + xbt_test_fail0("unexpected exception contents"); + xbt_ex_free(ex); + } + if (!c) + xbt_test_fail0("xbt_ex_free not executed"); +} + + +/* + * The following is the example included in the documentation. It's a good + * idea to check its syntax even if we don't try to run it. + * And actually, it allows to put comments in the code despite doxygen. + */ +static char *mallocex(int size) { + return NULL; +} +#define SMALLAMOUNT 10 +#define TOOBIG 100000000 + +#if 0 /* this contains syntax errors, actually */ +static void bad_example(void) { + struct {char*first;} *globalcontext; + ex_t ex; + + /* BAD_EXAMPLE */ + TRY { + char *cp1, *cp2, *cp3; + + cp1 = mallocex(SMALLAMOUNT); + globalcontext->first = cp1; + cp2 = mallocex(TOOBIG); + cp3 = mallocex(SMALLAMOUNT); + strcpy(cp1, "foo"); + strcpy(cp2, "bar"); + } CLEANUP { + if (cp3 != NULL) free(cp3); + if (cp2 != NULL) free(cp2); + if (cp1 != NULL) free(cp1); + } CATCH(ex) { + printf("cp3=%s", cp3); + RETHROW; + } + /* end_of_bad_example */ +} +#endif + +static void good_example(void) { + struct {char*first;} *globalcontext; + xbt_ex_t ex; + + /* GOOD_EXAMPLE */ + { /*01*/ + char * volatile /*03*/ cp1 = NULL /*02*/; + char * volatile /*03*/ cp2 = NULL /*02*/; + char * volatile /*03*/ cp3 = NULL /*02*/; + TRY { + cp1 = mallocex(SMALLAMOUNT); + globalcontext->first = cp1; + cp1 = NULL /*05 give away*/; + cp2 = mallocex(TOOBIG); + cp3 = mallocex(SMALLAMOUNT); + strcpy(cp1, "foo"); + strcpy(cp2, "bar"); + } CLEANUP { /*04*/ + printf("cp3=%s", cp3 == NULL /*02*/ ? "" : cp3); + if (cp3 != NULL) + free(cp3); + if (cp2 != NULL) + free(cp2); + /*05 cp1 was given away */ + } CATCH(ex) { + /*05 global context untouched */ + RETHROW; + } + } + /* end_of_good_example */ +} +#endif /* SIMGRID_TEST */