[PATCH] Cygwin: strace: ignore GCC exceptions
Corinna Vinschen
corinna-cygwin@cygwin.com
Thu Aug 20 14:06:39 GMT 2020
Hi Ken,
On Aug 20 09:54, Ken Brown via Cygwin-patches wrote:
> Any C++ app that calls 'throw' on 64-bit Cygwin results in an
> exception of type STATUS_GCC_THROW (0x20474343) generated by the C++
> runtime. Don't pollute the strace output by printing information
> about this and other GCC exceptions.
> ---
> winsup/utils/strace.cc | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/winsup/utils/strace.cc b/winsup/utils/strace.cc
> index 9b6569a70..2b317012d 100644
> --- a/winsup/utils/strace.cc
> +++ b/winsup/utils/strace.cc
> @@ -790,6 +790,13 @@ proc_child (unsigned mask, FILE *ofile, pid_t pid)
> case STATUS_BREAKPOINT:
> case 0x406d1388: /* SetThreadName exception. */
> break;
> +#ifdef __x86_64__
> + case 0x20474343: /* STATUS_GCC_THROW. */
> + case 0x21474343: /* STATUS_GCC_UNWIND. */
> + case 0x22474343: /* STATUS_GCC_FORCED. */
> + status = DBG_EXCEPTION_NOT_HANDLED;
> + break;
> +#endif
> default:
> status = DBG_EXCEPTION_NOT_HANDLED;
> if (ev.u.Exception.dwFirstChance)
> --
> 2.28.0
Wouldn't it make sense to create a header defining the GCC status values
as in libgcc/unwind-seh.c and share this between exceptions.cc and
strace.cc?
Thanks,
Corinna
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