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

checkexec: create destination directory if necessary...

checkexec: create destination directory if necessary Since 460733327640, a "share" use the cache of the source repository. A side effect is that no `.hg/cache` directory exists in the "share" anymore. As a result, the checkexec logic can't use it to create its temporary file and have to use the working copy for that. This is suboptimal, it pollutes the working copy and prevents them to keep the file around in cache. We do not want to use the cache directory for the share target, it might be on a different file system. So instead, we (try to) create the directory if it is missing. This is a simple change that fixes the current behavior regression on stable. On default, we should probably ensure the proper directories are created when initializing the repository. We should also introduce a 'wcache' directory to hold cache file related to the working copy. This would clarify the cache situation regarding shares. The tests catch a couple of other affected cases.

Augie Fackler - - Load All Authors

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                r40703:bd087497

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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"