6bda14b313
I did this a long time ago with a janky python script, but now clang-format has built-in support for this. I fed clang-format every line with a #include and let it re-sort things according to the precise LLVM rules for include ordering baked into clang-format these days. I've reverted a number of files where the results of sorting includes isn't healthy. Either places where we have legacy code relying on particular include ordering (where possible, I'll fix these separately) or where we have particular formatting around #include lines that I didn't want to disturb in this patch. This patch is *entirely* mechanical. If you get merge conflicts or anything, just ignore the changes in this patch and run clang-format over your #include lines in the files. Sorry for any noise here, but it is important to keep these things stable. I was seeing an increasing number of patches with irrelevant re-ordering of #include lines because clang-format was used. This patch at least isolates that churn, makes it easy to skip when resolving conflicts, and gets us to a clean baseline (again). llvm-svn: 304787
41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
|
|
// This test computes a checksum of the data (all but the last 4 bytes),
|
|
// and then compares the last 4 bytes with the computed value.
|
|
// A fuzzer with cmp traces is expected to defeat this check.
|
|
#include <cstdint>
|
|
#include <cstdio>
|
|
#include <cstdlib>
|
|
#include <cstring>
|
|
|
|
// A modified jenkins_one_at_a_time_hash initialized by non-zero,
|
|
// so that simple_hash(0) != 0. See also
|
|
// https://en.wikipedia.org/wiki/Jenkins_hash_function
|
|
static uint32_t simple_hash(const uint8_t *Data, size_t Size) {
|
|
uint32_t Hash = 0x12039854;
|
|
for (uint32_t i = 0; i < Size; i++) {
|
|
Hash += Data[i];
|
|
Hash += (Hash << 10);
|
|
Hash ^= (Hash >> 6);
|
|
}
|
|
Hash += (Hash << 3);
|
|
Hash ^= (Hash >> 11);
|
|
Hash += (Hash << 15);
|
|
return Hash;
|
|
}
|
|
|
|
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
|
|
if (Size < 14)
|
|
return 0;
|
|
|
|
uint32_t Hash = simple_hash(&Data[0], Size - 4);
|
|
uint32_t Want = reinterpret_cast<const uint32_t *>(&Data[Size - 4])[0];
|
|
if (Hash != Want)
|
|
return 0;
|
|
fprintf(stderr, "BINGO; simple_hash defeated: %x == %x\n", (unsigned int)Hash,
|
|
(unsigned int)Want);
|
|
exit(1);
|
|
return 0;
|
|
}
|