* [PATCH] Cygwin: strace: ignore GCC exceptions
@ 2020-08-20 13:54 Ken Brown
2020-08-20 14:06 ` Corinna Vinschen
0 siblings, 1 reply; 3+ messages in thread
From: Ken Brown @ 2020-08-20 13:54 UTC (permalink / raw)
To: cygwin-patches
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
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] Cygwin: strace: ignore GCC exceptions
2020-08-20 13:54 [PATCH] Cygwin: strace: ignore GCC exceptions Ken Brown
@ 2020-08-20 14:06 ` Corinna Vinschen
2020-08-20 14:52 ` Ken Brown
0 siblings, 1 reply; 3+ messages in thread
From: Corinna Vinschen @ 2020-08-20 14:06 UTC (permalink / raw)
To: cygwin-patches
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
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] Cygwin: strace: ignore GCC exceptions
2020-08-20 14:06 ` Corinna Vinschen
@ 2020-08-20 14:52 ` Ken Brown
0 siblings, 0 replies; 3+ messages in thread
From: Ken Brown @ 2020-08-20 14:52 UTC (permalink / raw)
To: cygwin-patches
On 8/20/2020 10:06 AM, Corinna Vinschen wrote:
> 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?
Yes, thanks for the suggestion. New patch(es) on the way. I called the header
"gcc_seh.h". Feel free to suggest a better name.
Ken
^ permalink raw reply [flat|nested] 3+ messages in thread
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2020-08-20 13:54 [PATCH] Cygwin: strace: ignore GCC exceptions Ken Brown
2020-08-20 14:06 ` Corinna Vinschen
2020-08-20 14:52 ` Ken Brown
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