diff options
Diffstat (limited to 'libobjc/exception.c')
| -rw-r--r-- | libobjc/exception.c | 72 |
1 files changed, 36 insertions, 36 deletions
diff --git a/libobjc/exception.c b/libobjc/exception.c index 4883448..1ffb80b 100644 --- a/libobjc/exception.c +++ b/libobjc/exception.c @@ -33,15 +33,13 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see /* This hook allows libraries to sepecify special actions when an exception is thrown without a handler in place. This is deprecated - in favour of objc_set_uncaught_exception_handler (). - */ + in favour of objc_set_uncaught_exception_handler (). */ void (*_objc_unexpected_exception) (id exception); /* !T:SAFE */ /* 'is_kind_of_exception_matcher' is our default exception matcher - it determines if the object 'exception' is of class 'catch_class', - or of a subclass. -*/ + or of a subclass. */ static int is_kind_of_exception_matcher (Class catch_class, id exception) { @@ -49,9 +47,8 @@ is_kind_of_exception_matcher (Class catch_class, id exception) if (catch_class == Nil) return 1; - /* If exception is nil (eg, @throw nil;), then it can only be catched - * by a catch-all (eg, @catch (id object)). - */ + /* If exception is nil (eg, @throw nil;), then it can only be + catched by a catch-all (eg, @catch (id object)). */ if (exception != nil) { Class c; @@ -114,19 +111,18 @@ static const _Unwind_Exception_Class __objc_exception_class /* This is the object that is passed around by the Objective C runtime to represent the exception in flight. */ - struct ObjcException { /* This bit is needed in order to interact with the unwind runtime. */ struct _Unwind_Exception base; - /* The actual object we want to throw. Note: must come immediately after - unwind header. */ + /* The actual object we want to throw. Note: must come immediately + after unwind header. */ id value; #ifdef __ARM_EABI_UNWINDER__ - /* Note: we use the barrier cache defined in the unwind control block for - ARM EABI. */ + /* Note: we use the barrier cache defined in the unwind control + block for ARM EABI. */ #else /* Cache some internal unwind data between phase 1 and phase 2. */ _Unwind_Ptr landingPad; @@ -156,14 +152,16 @@ parse_lsda_header (struct _Unwind_Context *context, const unsigned char *p, info->Start = (context ? _Unwind_GetRegionStart (context) : 0); - /* Find @LPStart, the base to which landing pad offsets are relative. */ + /* Find @LPStart, the base to which landing pad offsets are + relative. */ lpstart_encoding = *p++; if (lpstart_encoding != DW_EH_PE_omit) p = read_encoded_value (context, lpstart_encoding, p, &info->LPStart); else info->LPStart = info->Start; - /* Find @TType, the base of the handler and exception spec type data. */ + /* Find @TType, the base of the handler and exception spec type + data. */ info->ttype_encoding = *p++; if (info->ttype_encoding != DW_EH_PE_omit) { @@ -222,7 +220,8 @@ get_ttype_entry (struct lsda_header_info *info, _Unwind_Word i) #endif /* Using a different personality function name causes link failures - when trying to mix code using different exception handling models. */ + when trying to mix code using different exception handling + models. */ #ifdef SJLJ_EXCEPTIONS #define PERSONALITY_FUNCTION __gnu_objc_personality_sj0 #define __builtin_eh_return_data_regno(x) x @@ -294,14 +293,14 @@ PERSONALITY_FUNCTION (int version, } actions |= state & _US_FORCE_UNWIND; - /* TODO: Foreign exceptions need some attention (e.g. rethrowing doesn't - work). */ + /* TODO: Foreign exceptions need some attention (e.g. rethrowing + doesn't work). */ foreign_exception = 0; - /* The dwarf unwinder assumes the context structure holds things like the - function and LSDA pointers. The ARM implementation caches these in - the exception header (UCB). To avoid rewriting everything we make the - virtual IP register point at the UCB. */ + /* The dwarf unwinder assumes the context structure holds things + like the function and LSDA pointers. The ARM implementation + caches these in the exception header (UCB). To avoid rewriting + everything we make the virtual IP register point at the UCB. */ ip = (_Unwind_Ptr) ue_header; _Unwind_SetGR (context, 12, ip); @@ -351,8 +350,8 @@ PERSONALITY_FUNCTION (int version, #ifdef SJLJ_EXCEPTIONS /* The given "IP" is an index into the call-site table, with two exceptions -- -1 means no-action, and 0 means terminate. But - since we're using uleb128 values, we've not got random access - to the array. */ + since we're using uleb128 values, we've not got random access to + the array. */ if ((int) ip < 0) return _URC_CONTINUE_UNWIND; else @@ -373,13 +372,15 @@ PERSONALITY_FUNCTION (int version, goto found_something; } #else - /* Search the call-site table for the action associated with this IP. */ + /* Search the call-site table for the action associated with this + IP. */ while (p < info.action_table) { _Unwind_Ptr cs_start, cs_len, cs_lp; _uleb128_t cs_action; - /* Note that all call-site encodings are "absolute" displacements. */ + /* Note that all call-site encodings are "absolute" + displacements. */ p = read_encoded_value (0, info.call_site_encoding, p, &cs_start); p = read_encoded_value (0, info.call_site_encoding, p, &cs_len); p = read_encoded_value (0, info.call_site_encoding, p, &cs_lp); @@ -400,8 +401,8 @@ PERSONALITY_FUNCTION (int version, #endif /* SJLJ_EXCEPTIONS */ /* If ip is not present in the table, C++ would call terminate. */ - /* ??? As with Java, it's perhaps better to tweek the LSDA to - that no-action is mapped to no-entry. */ + /* ??? As with Java, it's perhaps better to tweek the LSDA to that + no-action is mapped to no-entry. */ CONTINUE_UNWINDING; found_something: @@ -410,8 +411,8 @@ PERSONALITY_FUNCTION (int version, if (landing_pad == 0) { - /* If ip is present, and has a null landing pad, there are - no cleanups or handlers to be run. */ + /* If ip is present, and has a null landing pad, there are no + cleanups or handlers to be run. */ } else if (action_record == 0) { @@ -438,14 +439,14 @@ PERSONALITY_FUNCTION (int version, } /* During forced unwinding, we only run cleanups. With a - foreign exception class, we have no class info to match. */ + foreign exception class, we have no class info to + match. */ else if ((actions & _UA_FORCE_UNWIND) || foreign_exception) ; else if (ar_filter > 0) { /* Positive filter values are handlers. */ - Class catch_type = get_ttype_entry (&info, ar_filter); if ((*__objc_exception_matcher) (catch_type, xh->value)) @@ -476,7 +477,8 @@ PERSONALITY_FUNCTION (int version, if (!saw_handler) CONTINUE_UNWINDING; - /* For domestic exceptions, we cache data from phase 1 for phase 2. */ + /* For domestic exceptions, we cache data from phase 1 for phase + 2. */ if (!foreign_exception) { #ifdef __ARM_EABI_UNWINDER__ @@ -531,16 +533,14 @@ objc_exception_throw (id exception) #endif /* No exception handler was installed. Call the uncaught exception - handler if any is defined. - */ + handler if any is defined. */ if (__objc_uncaught_exception_handler != 0) { (*__objc_uncaught_exception_handler) (exception); } /* As a last resort support the old, deprecated way of setting an - uncaught exception handler. - */ + uncaught exception handler. */ if (_objc_unexpected_exception != 0) { (*_objc_unexpected_exception) (exception); |