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Re: [PATCH] Call BUILT_IN_ASAN_HANDLE_NO_RETURN before BUILT_IN_UNWIND_RESUME (PR sanitizer/81021).


On 06/13/2017 02:09 AM, Martin Liška wrote:
> Hi.
> 
> For a function that does not handle an expection (and calls BUILT_IN_UNWIND_RESUME),
> we need to emit call to BUILT_IN_ASAN_HANDLE_NO_RETURN. That will clean up stack
> which can possibly contain poisoned shadow memory that will not be cleaned-up
> in function prologue.
> 
> Patch can bootstrap on ppc64le-redhat-linux and survives regression tests.
> 
> Ready to be installed?
> Martin
> 
> gcc/testsuite/ChangeLog:
> 
> 2017-06-12  Martin Liska  <mliska@suse.cz>
> 
> 	PR sanitizer/81021
> 	* g++.dg/asan/pr81021.C: New test.
> 
> gcc/ChangeLog:
> 
> 2017-06-12  Martin Liska  <mliska@suse.cz>
> 
> 	PR sanitizer/81021
> 	* tree-eh.c (lower_resx): Call BUILT_IN_ASAN_HANDLE_NO_RETURN
> 	before BUILT_IN_UNWIND_RESUME when ASAN is used.
OK.
Jeff


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