Mercurial > hg
view contrib/fuzz/xdiff.cc @ 43131:c17a63eb5d4c
sidedata: apply basic but tight security around exchange
We don't currently have code to deal with exchange between repository using
sidedata and repository not using sidedata. Until we implement such code (eg:
dropping side data when pushing to a non-sidedata repo) we prevent the two kind
of repo to speak to each other. This is somewhere similar to what 'treemanifest'
does.
Note that sidedata exchange is broken unless one use changegroup v3 anyway. See
next changeset for details.
Differential Revision: https://phab.mercurial-scm.org/D6939
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Sun, 06 Oct 2019 23:36:51 -0400 |
parents | 2e60a77b7058 |
children | 78df32a8b6f4 |
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/* * xdiff.cc - fuzzer harness for thirdparty/xdiff * * 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 "thirdparty/xdiff/xdiff.h" #include <inttypes.h> #include <stdlib.h> #include "fuzzutil.h" extern "C" { int hunk_consumer(long a1, long a2, long b1, long b2, void *priv) { // TODO: probably also test returning -1 from this when things break? return 0; } int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { // Don't allow fuzzer inputs larger than 100k, since we'll just bog // down and not accomplish much. if (Size > 100000) { return 0; } auto maybe_inputs = SplitInputs(Data, Size); if (!maybe_inputs) { return 0; } auto inputs = std::move(maybe_inputs.value()); mmfile_t a, b; a.ptr = inputs.left.get(); a.size = inputs.left_size; b.ptr = inputs.right.get(); b.size = inputs.right_size; xpparam_t xpp = { XDF_INDENT_HEURISTIC, /* flags */ }; xdemitconf_t xecfg = { XDL_EMIT_BDIFFHUNK, /* flags */ hunk_consumer, /* hunk_consume_func */ }; xdemitcb_t ecb = { NULL, /* priv */ }; xdl_diff(&a, &b, &xpp, &xecfg, &ecb); 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"