diff options
Diffstat (limited to 'gcc/unwind.inc')
-rw-r--r-- | gcc/unwind.inc | 65 |
1 files changed, 64 insertions, 1 deletions
diff --git a/gcc/unwind.inc b/gcc/unwind.inc index 0422cb81a03..0938d501f5f 100644 --- a/gcc/unwind.inc +++ b/gcc/unwind.inc @@ -232,10 +232,73 @@ _Unwind_Resume (struct _Unwind_Exception *exc) uw_install_context (&this_context, &cur_context); } + +/* Resume propagation of an FORCE_UNWIND exception, or to rethrow + a normal exception that was handled. */ + +_Unwind_Reason_Code +_Unwind_Resume_or_Rethrow (struct _Unwind_Exception *exc) +{ + struct _Unwind_Context this_context, cur_context; + _Unwind_Reason_Code code; + + /* Choose between continuing to process _Unwind_RaiseException + or _Unwind_ForcedUnwind. */ + if (exc->private_1 == 0) + return _Unwind_RaiseException (exc); + + uw_init_context (&this_context); + cur_context = this_context; + + code = _Unwind_ForcedUnwind_Phase2 (exc, &cur_context); + + if (code != _URC_INSTALL_CONTEXT) + abort (); + + uw_install_context (&this_context, &cur_context); +} + + /* A convenience function that calls the exception_cleanup field. */ void _Unwind_DeleteException (struct _Unwind_Exception *exc) { - (*exc->exception_cleanup) (_URC_FOREIGN_EXCEPTION_CAUGHT, exc); + if (exc->exception_cleanup) + (*exc->exception_cleanup) (_URC_FOREIGN_EXCEPTION_CAUGHT, exc); +} + + +/* Perform stack backtrace through unwind data. */ + +_Unwind_Reason_Code +_Unwind_Backtrace(_Unwind_Trace_Fn trace, void * trace_argument) +{ + struct _Unwind_Context context; + _Unwind_Reason_Code code; + + uw_init_context (&context); + + while (1) + { + _Unwind_FrameState fs; + + /* Set up fs to describe the FDE for the caller of context. */ + code = uw_frame_state_for (&context, &fs); + if (code != _URC_NO_REASON && code != _URC_END_OF_STACK) + return _URC_FATAL_PHASE1_ERROR; + + /* Call trace function. */ + if ((*trace) (&context, trace_argument) != _URC_NO_REASON) + return _URC_FATAL_PHASE1_ERROR; + + /* We're done at end of stack. */ + if (code == _URC_END_OF_STACK) + break; + + /* Update context to describe the same frame as fs. */ + uw_update_context (&context, &fs); + } + + return code; } |