Mercurial > hg
view contrib/fuzz/bdiff.cc @ 38173:fa0ddd5e8fff
fuzz: extract some common utilities and use modern C++ idioms
Alex Gaynor suggested we should probably copy the left and right sides
of diffs to new blocks so we can detect over-reads in the diffing
code, and I agree. Once I got into that, I realized we should do
things with C++17 idioms rather than keep using malloc() and
free(). This change is the result. I tried to split it more than this
and failed.
Everything still compiles and works in the oss-fuzz container, so I
think we can count on C++17 being available!
Differential Revision: https://phab.mercurial-scm.org/D3675
author | Augie Fackler <augie@google.com> |
---|---|
date | Sat, 28 Apr 2018 22:18:50 -0400 |
parents | 2b9e2415f5b5 |
children | dbc39f028c9f |
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/* * bdiff.cc - fuzzer harness for bdiff.c * * Copyright 2018, Google Inc. * * This software may be used and distributed according to the terms of * the GNU General Public License, incorporated herein by reference. */ #include <memory> #include <stdlib.h> #include "fuzzutil.h" extern "C" { #include "bdiff.h" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { auto maybe_inputs = SplitInputs(Data, Size); if (!maybe_inputs) { return 0; } auto inputs = std::move(maybe_inputs.value()); struct bdiff_line *a, *b; int an = bdiff_splitlines(inputs.left.get(), inputs.left_size, &a); int bn = bdiff_splitlines(inputs.right.get(), inputs.right_size, &b); struct bdiff_hunk l; bdiff_diff(a, an, b, bn, &l); free(a); free(b); bdiff_freehunks(l.next); return 0; // Non-zero return values are reserved for future use. } #ifdef HG_FUZZER_INCLUDE_MAIN int main(int argc, char **argv) { const char data[] = "asdf"; return LLVMFuzzerTestOneInput((const uint8_t *)data, 4); } #endif } // extern "C"