[llvm] r281106 - [libFuzzer] one more puzzle for value profile

[Kostya Serebryany via llvm-commits]

done, r281111.


On Fri, Sep 9, 2016 at 3:21 PM, Sean Silva <chisophugis at gmail.com> wrote:

>
>
> On Fri, Sep 9, 2016 at 2:58 PM, Kostya Serebryany via llvm-commits <
> llvm-commits at lists.llvm.org> wrote:
>
>> Author: kcc
>> Date: Fri Sep  9 16:58:42 2016
>> New Revision: 281106
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=281106&view=rev
>> Log:
>> [libFuzzer] one more puzzle for value profile
>>
>> Added:
>>     llvm/trunk/lib/Fuzzer/test/AbsNegAndConstant64Test.cpp
>> Modified:
>>     llvm/trunk/lib/Fuzzer/test/CMakeLists.txt
>>     llvm/trunk/lib/Fuzzer/test/value-profile-cmp.test
>>
>> Added: llvm/trunk/lib/Fuzzer/test/AbsNegAndConstant64Test.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Fuzzer/te
>> st/AbsNegAndConstant64Test.cpp?rev=281106&view=auto
>> ============================================================
>> ==================
>> --- llvm/trunk/lib/Fuzzer/test/AbsNegAndConstant64Test.cpp (added)
>> +++ llvm/trunk/lib/Fuzzer/test/AbsNegAndConstant64Test.cpp Fri Sep  9
>> 16:58:42 2016
>> @@ -0,0 +1,23 @@
>> +// This file is distributed under the University of Illinois Open Source
>> +// License. See LICENSE.TXT for details.
>> +
>> +// abs(x) < 0 and y == Const puzzle, 64-bit variant.
>> +#include <cstring>
>> +#include <cstdint>
>> +#include <cstdlib>
>> +#include <cstddef>
>> +#include <cstdio>
>> +
>> +extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
>> +  if (Size < 16) return 0;
>> +  long x;
>> +  unsigned long y;
>> +  memcpy(&x, Data, 8);
>> +  memcpy(&y, Data + 8, 8);
>>
>
> Can you use sizeof instead of hardcoded values?
>
> -- Sean Silva
>
>
>> +  if (labs(x) < 0 && y == 0xbaddcafedeadbeefUL) {
>> +    printf("BINGO; Found the target, exiting; x = 0x%lx y 0x%lx\n", x,
>> y);
>> +    exit(1);
>> +  }
>> +  return 0;
>> +}
>> +
>>
>> Modified: llvm/trunk/lib/Fuzzer/test/CMakeLists.txt
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Fuzzer/te
>> st/CMakeLists.txt?rev=281106&r1=281105&r2=281106&view=diff
>> ============================================================
>> ==================
>> --- llvm/trunk/lib/Fuzzer/test/CMakeLists.txt (original)
>> +++ llvm/trunk/lib/Fuzzer/test/CMakeLists.txt Fri Sep  9 16:58:42 2016
>> @@ -63,6 +63,7 @@ set(TestBinaries)
>>
>>  set(Tests
>>    AbsNegAndConstantTest
>> +  AbsNegAndConstant64Test
>>    AccumulateAllocationsTest
>>    BufferOverflowOnInput
>>    CallerCalleeTest
>>
>> Modified: llvm/trunk/lib/Fuzzer/test/value-profile-cmp.test
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Fuzzer/te
>> st/value-profile-cmp.test?rev=281106&r1=281105&r2=281106&view=diff
>> ============================================================
>> ==================
>> --- llvm/trunk/lib/Fuzzer/test/value-profile-cmp.test (original)
>> +++ llvm/trunk/lib/Fuzzer/test/value-profile-cmp.test Fri Sep  9
>> 16:58:42 2016
>> @@ -2,5 +2,6 @@ CHECK: BINGO
>>  RUN: not LLVMFuzzer-SimpleCmpTest -use_value_profile=1 -runs=100000000
>> 2>&1 | FileCheck %s
>>  RUN: not LLVMFuzzer-SimpleHashTest -use_value_profile=1 -runs=100000000
>> 2>&1 | FileCheck %s
>>  RUN: not LLVMFuzzer-AbsNegAndConstantTest -use_value_profile=1
>> -runs=100000000 2>&1 | FileCheck %s
>> +RUN: not LLVMFuzzer-AbsNegAndConstant64Test -use_value_profile=1
>> -runs=100000000 2>&1 | FileCheck %s
>>
>>
>>
>>
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>>
>
>
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