upstream/mercurial-mirror Files · contrib/fuzz/xdiff.cc

clone: process 'lookup' return as an arbitrary symbol...

clone: process 'lookup' return as an arbitrary symbol In theory, checkout is expected to be a node here because it was returned by peer.lookup. In practice, multiple important extensions (like hg-git, hg-subversion) use peers not backed by a mercurial repository where lookup cannot return a node. Allowing arbitrary symbols is necessary to make these extensions working with 4.7. We should probably introduce a new API in Core to have these extensions to work without abusing the lookup API. In the meantime, a small change to restore compatibility in 4.7 seems in order.

Augie Fackler - - Load All Authors

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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)

      {

      	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"

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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)
				{
				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"