- Timestamp:
- May 19, 2020, 5:31:20 PM (4 years ago)
- Branches:
- ADT, arm-eh, ast-experimental, enum, forall-pointer-decay, jacob/cs343-translation, master, new-ast, new-ast-unique-expr, pthread-emulation, qualifiedEnum
- Children:
- 918b90c
- Parents:
- 7d6e01d
- Location:
- libcfa/src
- Files:
-
- 3 edited
Legend:
- Unmodified
- Added
- Removed
-
libcfa/src/exception.c
r7d6e01d r046a890 10 10 // Created On : Mon Jun 26 15:13:00 2017 11 11 // Last Modified By : Andrew Beach 12 // Last Modified On : Tue Apr 14 12:01:00 202013 // Update Count : 1 812 // Last Modified On : Tue May 19 14:17:00 2020 13 // Update Count : 19 14 14 // 15 15 … … 80 80 } 81 81 82 void __cfaehm_throw_resume(exception_t * except ) {82 void __cfaehm_throw_resume(exception_t * except, void (*defaultHandler)(exception_t *)) { 83 83 struct exception_context_t * context = this_exception_context(); 84 84 … … 96 96 } 97 97 98 // No handler found, fall back to the default operation. 98 99 __cfadbg_print_safe(exception, "Unhandled exception\n"); 99 100 // Fall back to termination: 101 __cfaehm_throw_terminate(except); 102 // TODO: Default handler for resumption. 100 defaultHandler(except); 103 101 } 104 102 … … 240 238 241 239 // The exception that is being thrown must already be stored. 242 static __attribute__((noreturn)) void __cfaehm_begin_unwind(void) {240 static void __cfaehm_begin_unwind(void(*defaultHandler)(exception_t *)) { 243 241 if ( ! this_exception_context()->current_exception ) { 244 242 printf("UNWIND ERROR missing exception in begin unwind\n"); … … 257 255 258 256 // No handler found, go to the default operation. 259 // Currently this will always be a cancellation.260 257 if ( ret == _URC_END_OF_STACK ) { 261 258 __cfadbg_print_safe(exception, "Uncaught exception %p\n", &this_exception_storage); 262 259 263 __cfaehm_cancel_stack(this_exception_context()->current_exception);260 defaultHandler( this_exception_context()->current_exception ); 264 261 } 265 262 … … 269 266 } 270 267 271 void __cfaehm_throw_terminate( exception_t * val ) {268 void __cfaehm_throw_terminate( exception_t * val, void (*defaultHandler)(exception_t *) ) { 272 269 __cfadbg_print_safe(exception, "Throwing termination exception\n"); 273 270 274 271 __cfaehm_allocate_exception( val ); 275 __cfaehm_begin_unwind(); 272 __cfaehm_begin_unwind( defaultHandler ); 273 } 274 275 static __attribute__((noreturn)) void __cfaehm_rethrow_adapter( exception_t * except ) { 276 // TODO: Print some error message. 277 (void)except; 278 abort(); 276 279 } 277 280 … … 279 282 __cfadbg_print_safe(exception, "Rethrowing termination exception\n"); 280 283 281 __cfaehm_begin_unwind(); 284 __cfaehm_begin_unwind( __cfaehm_rethrow_adapter ); 285 abort(); 282 286 } 283 287 -
libcfa/src/exception.h
r7d6e01d r046a890 10 10 // Created On : Mon Jun 26 15:11:00 2017 11 11 // Last Modified By : Andrew Beach 12 // Last Modified On : Fri Mar 27 10:16:00 202013 // Update Count : 912 // Last Modified On : Tue May 19 14:17:00 2020 13 // Update Count : 10 14 14 // 15 15 … … 41 41 42 42 // Used in throw statement translation. 43 void __cfaehm_throw_terminate(exception_t * except ) __attribute__((noreturn));43 void __cfaehm_throw_terminate(exception_t * except, void (*)(exception_t *)); 44 44 void __cfaehm_rethrow_terminate() __attribute__((noreturn)); 45 void __cfaehm_throw_resume(exception_t * except );45 void __cfaehm_throw_resume(exception_t * except, void (*)(exception_t *)); 46 46 47 47 // Function catches termination exceptions. … … 72 72 #ifdef __cforall 73 73 } 74 75 // Not all the built-ins can be expressed in C. These can't be 76 // implemented in the .c file either so they all have to be inline. 77 78 trait is_exception(dtype T) { 79 /* The first field must be a pointer to a virtual table. 80 * That virtual table must be a decendent of the base exception virtual tab$ 81 */ 82 void mark_exception(T *); 83 // This is never used and should be a no-op. 84 }; 85 86 trait is_termination_exception(dtype T | is_exception(T)) { 87 void defaultTerminationHandler(T &); 88 }; 89 90 trait is_resumption_exception(dtype T | is_exception(T)) { 91 void defaultResumptionHandler(T &); 92 }; 93 94 forall(dtype T | is_termination_exception(T)) 95 static inline void $throw(T & except) { 96 __cfaehm_throw_terminate( 97 (exception_t *)&except, 98 (void(*)(exception_t *))defaultTerminationHandler 99 ); 100 } 101 102 forall(dtype T | is_resumption_exception(T)) 103 static inline void $throwResume(T & except) { 104 __cfaehm_throw_resume( 105 (exception_t *)&except, 106 (void(*)(exception_t *))defaultResumptionHandler 107 ); 108 } 109 110 forall(dtype T | is_exception(T)) 111 static inline void cancel_stack(T & except) __attribute__((noreturn)) { 112 __cfaehm_cancel_stack( (exception_t *)&except ); 113 } 114 115 forall(dtype T | is_exception(T)) 116 static inline void defaultTerminationHandler(T & except) { 117 return cancel_stack( except ); 118 } 119 120 forall(dtype T | is_exception(T)) 121 static inline void defaultResumptionHandler(T & except) { 122 throw except; 123 } 124 74 125 #endif -
libcfa/src/exception.hfa
r7d6e01d r046a890 10 10 // Created On : Thu Apr 7 10:25:00 2020 11 11 // Last Modified By : Andrew Beach 12 // Last Modified On : Wed Apr 13 15:42:00 202013 // Update Count : 112 // Last Modified On : Tue May 19 14:17:00 2020 13 // Update Count : 2 14 14 // 15 16 trait is_exception(dtype T) {17 // The trait system can't describe the actual constrants.18 // Unused, should always be a no-op.19 void mark_exception(T *);20 };21 22 forall(dtype T | is_exception(T))23 inline void cancel_stack(T & except) __attribute__((noreturn)) {24 __cfaehm_cancel_stack( (exception_t *)&except );25 }26 15 27 16 // Everything below this line should be considered a patch while the exception
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