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* [Bug c++/11813] New: Make GCC not to assume that C functions can't throw.
@ 2003-08-05 22:53 v dot haisman at sh dot cvut dot cz
2003-08-05 22:54 ` [Bug c++/11813] " v dot haisman at sh dot cvut dot cz
` (8 more replies)
0 siblings, 9 replies; 10+ messages in thread
From: v dot haisman at sh dot cvut dot cz @ 2003-08-05 22:53 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11813
Summary: Make GCC not to assume that C functions can't throw.
Product: gcc
Version: 3.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: v dot haisman at sh dot cvut dot cz
CC: gcc-bugs at gcc dot gnu dot org,v dot haisman at sh dot
cvut dot cz
GCC build triplet: *-*-*
GCC host triplet: *-*-*
GCC target triplet: *-*-*
This test case shows that C++ exceptions are not caught across C function calls.
Although this can be cured by supplying -fexceptions for compilation of C files,
it is not always possible solution. For example when the program is linked with
third party's binary C library whose compilation flags can't be controled.
MSVC++ allows user to specify option /EHsc- that enables exceptions and also
stops the compiler from assuming that C functions can't throw. I think that some
users of GCC would like to have similar flag too.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug c++/11813] Make GCC not to assume that C functions can't throw.
2003-08-05 22:53 [Bug c++/11813] New: Make GCC not to assume that C functions can't throw v dot haisman at sh dot cvut dot cz
@ 2003-08-05 22:54 ` v dot haisman at sh dot cvut dot cz
2003-08-05 22:55 ` v dot haisman at sh dot cvut dot cz
` (7 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: v dot haisman at sh dot cvut dot cz @ 2003-08-05 22:54 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11813
------- Additional Comments From v dot haisman at sh dot cvut dot cz 2003-08-05 22:54 -------
Created an attachment (id=4565)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=4565&action=view)
build.sh
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug c++/11813] Make GCC not to assume that C functions can't throw.
2003-08-05 22:53 [Bug c++/11813] New: Make GCC not to assume that C functions can't throw v dot haisman at sh dot cvut dot cz
2003-08-05 22:54 ` [Bug c++/11813] " v dot haisman at sh dot cvut dot cz
2003-08-05 22:55 ` v dot haisman at sh dot cvut dot cz
@ 2003-08-05 22:55 ` v dot haisman at sh dot cvut dot cz
2003-08-05 22:56 ` v dot haisman at sh dot cvut dot cz
` (5 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: v dot haisman at sh dot cvut dot cz @ 2003-08-05 22:55 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11813
------- Additional Comments From v dot haisman at sh dot cvut dot cz 2003-08-05 22:55 -------
Created an attachment (id=4566)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=4566&action=view)
libx.h
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug c++/11813] Make GCC not to assume that C functions can't throw.
2003-08-05 22:53 [Bug c++/11813] New: Make GCC not to assume that C functions can't throw v dot haisman at sh dot cvut dot cz
2003-08-05 22:54 ` [Bug c++/11813] " v dot haisman at sh dot cvut dot cz
@ 2003-08-05 22:55 ` v dot haisman at sh dot cvut dot cz
2003-08-05 22:55 ` v dot haisman at sh dot cvut dot cz
` (6 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: v dot haisman at sh dot cvut dot cz @ 2003-08-05 22:55 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11813
------- Additional Comments From v dot haisman at sh dot cvut dot cz 2003-08-05 22:55 -------
Created an attachment (id=4567)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=4567&action=view)
libx.c
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug c++/11813] Make GCC not to assume that C functions can't throw.
2003-08-05 22:53 [Bug c++/11813] New: Make GCC not to assume that C functions can't throw v dot haisman at sh dot cvut dot cz
` (2 preceding siblings ...)
2003-08-05 22:55 ` v dot haisman at sh dot cvut dot cz
@ 2003-08-05 22:56 ` v dot haisman at sh dot cvut dot cz
2003-08-05 23:16 ` [Bug other/11813] " pinskia at physics dot uc dot edu
` (4 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: v dot haisman at sh dot cvut dot cz @ 2003-08-05 22:56 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11813
------- Additional Comments From v dot haisman at sh dot cvut dot cz 2003-08-05 22:56 -------
Created an attachment (id=4568)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=4568&action=view)
main.cpp
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug other/11813] Make GCC not to assume that C functions can't throw.
2003-08-05 22:53 [Bug c++/11813] New: Make GCC not to assume that C functions can't throw v dot haisman at sh dot cvut dot cz
` (3 preceding siblings ...)
2003-08-05 22:56 ` v dot haisman at sh dot cvut dot cz
@ 2003-08-05 23:16 ` pinskia at physics dot uc dot edu
2003-08-05 23:42 ` bangerth at dealii dot org
` (3 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: pinskia at physics dot uc dot edu @ 2003-08-05 23:16 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11813
pinskia at physics dot uc dot edu changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
Component|c++ |other
------- Additional Comments From pinskia at physics dot uc dot edu 2003-08-05 23:16 -------
I think the current consensus is to enable -fexceptions all the time since pthread_kill callbacks will
use exceptions but I could be wrong.
Also -fexceptions sounds like the same as /EHsc- but I could be wrong there.
The current problem with enabling -fexceptions all the time it adds size overhead in the case of
dwarf2 exceptions and size and time overhead in the case of setjmp/longjmp exceptions.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug other/11813] Make GCC not to assume that C functions can't throw.
2003-08-05 22:53 [Bug c++/11813] New: Make GCC not to assume that C functions can't throw v dot haisman at sh dot cvut dot cz
` (4 preceding siblings ...)
2003-08-05 23:16 ` [Bug other/11813] " pinskia at physics dot uc dot edu
@ 2003-08-05 23:42 ` bangerth at dealii dot org
2003-08-06 7:29 ` gdr at integrable-solutions dot net
` (2 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: bangerth at dealii dot org @ 2003-08-05 23:42 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11813
bangerth at dealii dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Priority|P2 |P3
Last reconfirmed|0000-00-00 00:00:00 |2003-08-05 23:42:54
date| |
Target Milestone|3.4 |---
Version|3.3.1 |3.4
------- Additional Comments From bangerth at dealii dot org 2003-08-05 23:42 -------
I can confirm this. However, I personally think that if you want to make
this happen (i.e. want to propagate C++ exceptions through C code), then
you should have to pay the price of giving -fexceptions to the command
line.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug other/11813] Make GCC not to assume that C functions can't throw.
2003-08-05 22:53 [Bug c++/11813] New: Make GCC not to assume that C functions can't throw v dot haisman at sh dot cvut dot cz
` (5 preceding siblings ...)
2003-08-05 23:42 ` bangerth at dealii dot org
@ 2003-08-06 7:29 ` gdr at integrable-solutions dot net
2003-08-06 7:33 ` gdr at integrable-solutions dot net
2005-01-25 16:13 ` [Bug c/11813] make -fexceptions default for c and objective-c pinskia at gcc dot gnu dot org
8 siblings, 0 replies; 10+ messages in thread
From: gdr at integrable-solutions dot net @ 2003-08-06 7:29 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11813
------- Additional Comments From gdr at integrable-solutions dot net 2003-08-06 07:29 -------
Subject: Re: New: Make GCC not to assume that C functions can't throw.
the proper way (for users) to handle this is to compile C code with
-fexceptions. But yes, that is VERY inconvenient because it requires
foeresight to know that a C function won't use a callback from C++
code. That is sad.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug other/11813] Make GCC not to assume that C functions can't throw.
2003-08-05 22:53 [Bug c++/11813] New: Make GCC not to assume that C functions can't throw v dot haisman at sh dot cvut dot cz
` (6 preceding siblings ...)
2003-08-06 7:29 ` gdr at integrable-solutions dot net
@ 2003-08-06 7:33 ` gdr at integrable-solutions dot net
2005-01-25 16:13 ` [Bug c/11813] make -fexceptions default for c and objective-c pinskia at gcc dot gnu dot org
8 siblings, 0 replies; 10+ messages in thread
From: gdr at integrable-solutions dot net @ 2003-08-06 7:33 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11813
------- Additional Comments From gdr at integrable-solutions dot net 2003-08-06 07:33 -------
Subject: Re: Make GCC not to assume that C functions can't throw.
"bangerth at dealii dot org" <gcc-bugzilla@gcc.gnu.org> writes:
| I can confirm this. However, I personally think that if you want to make
| this happen (i.e. want to propagate C++ exceptions through C code), then
| you should have to pay the price of giving -fexceptions to the command
| line.
However, that way of doing things require more foresight you can
imagine. Imagine an X11 library compiled as plain C source with
-fno-exceptions. That library cannot be used reliebly by a C++
programs because if it provides a callback (with C linkage) that might
throw directly of indirectly (most frequent), GCC will not propagate
that exception properly to the program. It will just abort. That is
an unfortunate situation.
-- Gaby
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug c/11813] make -fexceptions default for c and objective-c
2003-08-05 22:53 [Bug c++/11813] New: Make GCC not to assume that C functions can't throw v dot haisman at sh dot cvut dot cz
` (7 preceding siblings ...)
2003-08-06 7:33 ` gdr at integrable-solutions dot net
@ 2005-01-25 16:13 ` pinskia at gcc dot gnu dot org
8 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-01-25 16:13 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-01-25 16:11 -------
*** Bug 19620 has been marked as a duplicate of this bug. ***
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |jkanze at cheuvreux dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11813
^ permalink raw reply [flat|nested] 10+ messages in thread
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2003-08-05 22:53 [Bug c++/11813] New: Make GCC not to assume that C functions can't throw v dot haisman at sh dot cvut dot cz
2003-08-05 22:54 ` [Bug c++/11813] " v dot haisman at sh dot cvut dot cz
2003-08-05 22:55 ` v dot haisman at sh dot cvut dot cz
2003-08-05 22:55 ` v dot haisman at sh dot cvut dot cz
2003-08-05 22:56 ` v dot haisman at sh dot cvut dot cz
2003-08-05 23:16 ` [Bug other/11813] " pinskia at physics dot uc dot edu
2003-08-05 23:42 ` bangerth at dealii dot org
2003-08-06 7:29 ` gdr at integrable-solutions dot net
2003-08-06 7:33 ` gdr at integrable-solutions dot net
2005-01-25 16:13 ` [Bug c/11813] make -fexceptions default for c and objective-c pinskia at gcc dot gnu dot org
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