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Re: -finstrument-functions and stack unwinding on C++ exceptions
- From: Ian Lance Taylor <iant at google dot com>
- To: Earl Chew <earl_chew at agilent dot com>
- Cc: gcc-help at gcc dot gnu dot org
- Date: 13 Nov 2007 08:09:48 -0800
- Subject: Re: -finstrument-functions and stack unwinding on C++ exceptions
- References: <4737AFA8.email@example.com>
Earl Chew <firstname.lastname@example.org> writes:
> The -finstrument-functions options inserts calls to __cyg_profile_func_enter
> and __cyg_profile_func_exit into functions and methods.
> In particular __cyg_profile_func_exit is called just prior to the
> function/method epilogue.
> In C++ a method can also terminate due to an exception. This causes
> the stack to unwind as the runtime searches for an exception handler.
> As the intervening stack frames are unwound, are the related calls
> to __cyg_profile_func_exit called, or will those stack frames
> end up with an unmatched __cyg_profile_func_enter ?
Try it and see.
I would bet that you will see an unmatched __cyg_profile_func_enter.