X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/7143a7cd4af07cfcb16e49a957e8ce527fa119df..c887f0caadd5c4a3ca769c84e9f5e732e0853edb:/include/xbt/ex.h diff --git a/include/xbt/ex.h b/include/xbt/ex.h index c2d2cacca4..597ce19917 100644 --- a/include/xbt/ex.h +++ b/include/xbt/ex.h @@ -32,8 +32,8 @@ #ifndef __XBT_EX_H__ #define __XBT_EX_H__ -#include #include +#include /* do not include execinfo.h directly since it's not always available. Instead, copy the parts we need (and fake when it's not there) */ @@ -43,6 +43,33 @@ extern int backtrace (void **__array, int __size); #include #include + +/*-*-* Emergency debuging: define this when the exceptions get crazy *-*-*/ +#undef __EX_MAYDAY + +#ifdef __EX_MAYDAY +int gras_os_getpid(void); +# define MAYDAY_SAVE(m) printf("%d %s:%d save %p\n", \ + gras_os_getpid(),__FILE__,__LINE__, \ + (m)->jb \ + ), +# define MAYDAY_RESTORE(m) printf("%d %s:%d restore %p\n", \ + gras_os_getpid(),__FILE__,__LINE__, \ + (m)->jb \ + ), +# define MAYDAY_CATCH(e) printf("%d %s:%d Catched '%s'\n", \ + gras_os_getpid(),__FILE__,__LINE__, \ + e.msg \ + ), +#else +# define MAYDAY_SAVE(m) +# define MAYDAY_RESTORE(m) +# define MAYDAY_CATCH(e) +#endif + +/*-*-* end of debugging stuff *-*-*/ + + /* the machine context */ #if defined(__EX_MCTX_MCSC__) #include /* POSIX.1 ucontext(3) */ @@ -58,17 +85,17 @@ extern int backtrace (void **__array, int __size); #define __ex_mctx_restored(mctx) /* noop */ #define __ex_mctx_restore(mctx) (void)siglongjmp((mctx)->jb, 1) -#elif defined(__EX_MCTX_SJLJ__) || !defined(__EX_MCTX_CUSTOM__) +#elif defined(__EX_MCTX_SJLJ__) || !defined(__EX_MCTX_CUSTOM__) || defined(__EX_MAYDAY) #include /* ISO-C jmp_buf(3) */ #define __ex_mctx_struct jmp_buf jb; -#define __ex_mctx_save(mctx) (setjmp((mctx)->jb) == 0) +#define __ex_mctx_save(mctx) ( MAYDAY_SAVE(mctx) setjmp((mctx)->jb) == 0) #define __ex_mctx_restored(mctx) /* noop */ -#define __ex_mctx_restore(mctx) (void)longjmp((mctx)->jb, 1) +#define __ex_mctx_restore(mctx) ( MAYDAY_RESTORE(mctx) (void)longjmp((mctx)->jb, 1)) #endif /* declare the machine context type */ typedef struct { __ex_mctx_struct } __ex_mctx_t; - + /** @addtogroup XBT_ex * @brief A set of macros providing exception a la C++ in ANSI C (grounding feature) * @@ -139,9 +166,13 @@ typedef struct { __ex_mctx_struct } __ex_mctx_t; * CATCH clauses. * - it is possible to nest TRY clauses. * - * The TRY block is a regular ISO-C language statement block, but it is not + * The TRY block is a regular ISO-C language statement block, but + * + *
it is not * allowed to jump into it via "goto" or longjmp(3) or out of it via "break", - * "return", "goto" or longjmp(3) because there is some hidden setup and + * "return", "goto" or longjmp(3).
+ * + * This is because there is some hidden setup and * cleanup that needs to be done regardless of whether an exception is * caught. Bypassing these steps will break the exception handling facility. * @@ -211,6 +242,7 @@ typedef struct { __ex_mctx_struct } __ex_mctx_t; * @{ */ +/** @brief different kind of errors */ typedef enum { unknown_error=0, /**< unknown error */ arg_error, /**< Invalid argument */ @@ -231,51 +263,56 @@ typedef struct { xbt_errcat_t category; /**< category like HTTP (what went wrong) */ int value; /**< like errno (why did it went wrong) */ /* throw point */ - char *host; /* NULL for localhost; hostname:port if remote */ + short int remote; /* whether it was raised remotely */ + char *host; /* NULL for localhost; hostname if remote */ + /* FIXME: host should be hostname:port[#thread] */ char *procname; char *file; /**< to be freed only for remote exceptions */ int line; char *func; /**< to be freed only for remote exceptions */ /* Backtrace */ - void *bt[XBT_BACKTRACE_SIZE]; int used; + char **bt_strings; /* only filed on display (or before the network propagation) */ + void *bt[XBT_BACKTRACE_SIZE]; } xbt_ex_t; /* declare the context type (private) */ typedef struct { __ex_mctx_t *ctx_mctx; /* permanent machine context of enclosing try/catch */ - int ctx_caught; /* temporary flag whether exception was caught */ - volatile xbt_ex_t ctx_ex; /* temporary exception storage */ + volatile int ctx_caught; /* temporary flag whether exception was caught */ + volatile xbt_ex_t ctx_ex; /* temporary exception storage */ } ex_ctx_t; /* the static and dynamic initializers for a context structure */ #define XBT_CTX_INITIALIZER \ { NULL, 0, { /* content */ NULL, unknown_error, 0, \ - /* throw point*/ NULL, NULL, NULL, 0, NULL,\ - /* backtrace */ {NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL},0 } } + /* throw point*/ 0,NULL, NULL, NULL, 0, NULL,\ + /* backtrace */ 0,NULL,{NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL} } } #define XBT_CTX_INITIALIZE(ctx) \ do { \ - (ctx)->ctx_mctx = NULL; \ - (ctx)->ctx_caught = 0; \ - (ctx)->ctx_ex.msg = NULL; \ - (ctx)->ctx_ex.category = 0; \ - (ctx)->ctx_ex.value = 0; \ - (ctx)->ctx_ex.host = NULL; \ - (ctx)->ctx_ex.procname = NULL; \ - (ctx)->ctx_ex.file = NULL; \ - (ctx)->ctx_ex.line = 0; \ - (ctx)->ctx_ex.func = NULL; \ - (ctx)->ctx_ex.bt[0] = NULL; \ - (ctx)->ctx_ex.bt[1] = NULL; \ - (ctx)->ctx_ex.bt[2] = NULL; \ - (ctx)->ctx_ex.bt[3] = NULL; \ - (ctx)->ctx_ex.bt[4] = NULL; \ - (ctx)->ctx_ex.bt[5] = NULL; \ - (ctx)->ctx_ex.bt[6] = NULL; \ - (ctx)->ctx_ex.bt[7] = NULL; \ - (ctx)->ctx_ex.bt[8] = NULL; \ - (ctx)->ctx_ex.bt[9] = NULL; \ - (ctx)->ctx_ex.used = 0; \ + (ctx)->ctx_mctx = NULL; \ + (ctx)->ctx_caught = 0; \ + (ctx)->ctx_ex.msg = NULL; \ + (ctx)->ctx_ex.category = 0; \ + (ctx)->ctx_ex.value = 0; \ + (ctx)->ctx_ex.remote = 0; \ + (ctx)->ctx_ex.host = NULL; \ + (ctx)->ctx_ex.procname = NULL; \ + (ctx)->ctx_ex.file = NULL; \ + (ctx)->ctx_ex.line = 0; \ + (ctx)->ctx_ex.func = NULL; \ + (ctx)->ctx_ex.bt[0] = NULL; \ + (ctx)->ctx_ex.bt[1] = NULL; \ + (ctx)->ctx_ex.bt[2] = NULL; \ + (ctx)->ctx_ex.bt[3] = NULL; \ + (ctx)->ctx_ex.bt[4] = NULL; \ + (ctx)->ctx_ex.bt[5] = NULL; \ + (ctx)->ctx_ex.bt[6] = NULL; \ + (ctx)->ctx_ex.bt[7] = NULL; \ + (ctx)->ctx_ex.bt[8] = NULL; \ + (ctx)->ctx_ex.bt[9] = NULL; \ + (ctx)->ctx_ex.used = 0; \ + (ctx)->ctx_ex.bt_strings = NULL; \ } while (0) /* the exception context */ @@ -343,10 +380,18 @@ extern void __xbt_ex_terminate_default(xbt_ex_t *e); __xbt_ex_ctx_ptr->ctx_mctx = __ex_mctx_en; \ } \ if ( !(__xbt_ex_ctx()->ctx_caught) \ - || ((e) = XBT_EX_T_CPLUSPLUSCAST __xbt_ex_ctx()->ctx_ex, 0)) { \ + || ((e) = XBT_EX_T_CPLUSPLUSCAST __xbt_ex_ctx()->ctx_ex, MAYDAY_CATCH(e) 0)) { \ } \ else +#define DO_THROW(e) \ + /* deal with the exception */ \ + if (__xbt_ex_ctx()->ctx_mctx == NULL) \ + __xbt_ex_terminate((xbt_ex_t *)&(e)); /* not catched */\ + else \ + __ex_mctx_restore(__xbt_ex_ctx()->ctx_mctx); /* catched somewhere */ \ + abort()/* nope, stupid GCC, we won't survive a THROW (this won't be reached) */ + /** @brief Helper macro for THROWS0-6 * @hideinitializer * @@ -369,20 +414,16 @@ extern void __xbt_ex_terminate_default(xbt_ex_t *e); do { /* change this sequence into one block */ \ /* build the exception */ \ __xbt_ex_ctx()->ctx_ex.msg = (m); \ - __xbt_ex_ctx()->ctx_ex.category = (c); \ + __xbt_ex_ctx()->ctx_ex.category = (xbt_errcat_t)(c); \ __xbt_ex_ctx()->ctx_ex.value = (v); \ + __xbt_ex_ctx()->ctx_ex.remote = 0; \ __xbt_ex_ctx()->ctx_ex.host = (char*)NULL; \ __xbt_ex_ctx()->ctx_ex.procname = strdup(xbt_procname()); \ __xbt_ex_ctx()->ctx_ex.file = (char*)__FILE__; \ __xbt_ex_ctx()->ctx_ex.line = __LINE__; \ __xbt_ex_ctx()->ctx_ex.func = (char*)_XBT_FUNCTION; \ __xbt_ex_ctx()->ctx_ex.used = backtrace((void**)__xbt_ex_ctx()->ctx_ex.bt,XBT_BACKTRACE_SIZE);\ - /* deal with the exception */ \ - if (__xbt_ex_ctx()->ctx_mctx == NULL) \ - __xbt_ex_terminate((xbt_ex_t *)&(__xbt_ex_ctx()->ctx_ex)); /* not catched */\ - else \ - __ex_mctx_restore(__xbt_ex_ctx()->ctx_mctx); /* catched somewhere */ \ - abort();/* nope, stupid GCC, we won't survive a THROW (this won't be reached) */ \ + DO_THROW(__xbt_ex_ctx()->ctx_ex);\ } while (0) /** @brief Builds and throws an exception with a string taking no arguments @@ -467,7 +508,7 @@ extern void __xbt_ex_terminate_default(xbt_ex_t *e); #define RETHROW5(msg,a,b,c,d,e) _XBT_PRE_RETHROW msg,a,b,c,d,e _XBT_POST_RETHROW /** @brief Exception destructor */ -void xbt_ex_free(xbt_ex_t e); +void xbt_ex_free(xbt_ex_t *e); void xbt_ex_display(xbt_ex_t *e);