[llvm] r262667 - [libFuzzer] when interrupted, call _Exit() instead of exit()

[Aaron Ballman via llvm-commits]

On Thu, Mar 3, 2016 at 5:59 PM, David Blaikie via llvm-commits
<llvm-commits at lists.llvm.org> wrote:
> Portability for one, I'd imagine - does _Exit exist in all the platforms we
> want to run on?

It should, it's part of the C standard library incorporated by
reference into C++ (aka, C99).

~Aaron

>
> On Thu, Mar 3, 2016 at 2:56 PM, Kostya Serebryany <kcc at google.com> wrote:
>>
>> Why?
>> I call this when interrupted by Ctrl-C, so I don't want any
>> std::at_quick_exit handlers to be called.
>> Otherwise it's just _Exit
>>
>> On Thu, Mar 3, 2016 at 2:46 PM, David Blaikie <dblaikie at gmail.com> wrote:
>>>
>>> quick_exit, perhaps?
>>> http://en.cppreference.com/w/cpp/utility/program/quick_exit
>>>
>>> On Thu, Mar 3, 2016 at 2:36 PM, Kostya Serebryany via llvm-commits
>>> <llvm-commits at lists.llvm.org> wrote:
>>>>
>>>> Author: kcc
>>>> Date: Thu Mar  3 16:36:37 2016
>>>> New Revision: 262667
>>>>
>>>> URL: http://llvm.org/viewvc/llvm-project?rev=262667&view=rev
>>>> Log:
>>>> [libFuzzer] when interrupted, call _Exit() instead of exit()
>>>>
>>>> Modified:
>>>>     llvm/trunk/lib/Fuzzer/FuzzerLoop.cpp
>>>>
>>>> Modified: llvm/trunk/lib/Fuzzer/FuzzerLoop.cpp
>>>> URL:
>>>> http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Fuzzer/FuzzerLoop.cpp?rev=262667&r1=262666&r2=262667&view=diff
>>>>
>>>> ==============================================================================
>>>> --- llvm/trunk/lib/Fuzzer/FuzzerLoop.cpp (original)
>>>> +++ llvm/trunk/lib/Fuzzer/FuzzerLoop.cpp Thu Mar  3 16:36:37 2016
>>>> @@ -130,7 +130,7 @@ void Fuzzer::CrashCallback() {
>>>>  void Fuzzer::InterruptCallback() {
>>>>    Printf("==%d== libFuzzer: run interrupted; exiting\n", GetPid());
>>>>    PrintFinalStats();
>>>> -  exit(0);
>>>> +  _Exit(0);  // Stop right now, don't perform any at-exit actions.
>>>>  }
>>>>
>>>>  void Fuzzer::AlarmCallback() {
>>>>
>>>>
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>>>
>>>
>>
>
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