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

[Martin Liška]

PING^2

On 06/20/2017 02:15 PM, Martin Liška wrote:
> PING^1
> 
> On 06/13/2017 10:09 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.
>> ---
>>  gcc/testsuite/g++.dg/asan/pr81021.C | 33 +++++++++++++++++++++++++++++++++
>>  gcc/tree-eh.c                       | 14 ++++++++++++++
>>  2 files changed, 47 insertions(+)
>>  create mode 100644 gcc/testsuite/g++.dg/asan/pr81021.C
>>
>>
>