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

make: switch the PYTHON default to `py.exe -3` on Windows...

make: switch the PYTHON default to `py.exe -3` on Windows Python3 _is_ named `python.exe` on Windows, but that isn't necessarily on PATH when installing from python.org. I do happen to have a python.exe on PATH in `$LOCALAPPDATA/Microsoft/WindowsApps`, but it appears to be 0 bytes (likely because of permission issues), and doesn't run: $ python -V - Cannot open Pulkit hit the same error as I did though, so it isn't just my system: $ make -C . local make: Entering directory `/home/Dell/repos/hg-committed` python setup.py \ build_py -c -d . \ build_ext -i \ build_hgexe -i \ build_mo - Cannot openmake: *** [local] Error 1 The `py.exe` dispatcher lives in the Windows directory (so it is on PATH), looks up the python.org installation, and invokes that interpreter directly. I get a warning with py39, but if it's our issue, it was an existing one: $ make -C .. local make: Entering directory `/c/Users/Matt/hg' py -3 setup.py \ build_py -c -d . \ build_ext -i \ build_hgexe -i \ build_mo C:\Users\Matt\AppData\Local\Programs\Python\Python39\lib\site-packages\setuptools\distutils_patch.py:25: UserWarning: Distutils was imported before Setuptools. This usage is discouraged and may exhibit undesirable behaviors or errors. Please use Setuptools' objects directly or at least import Setuptools first. warnings.warn( The end result is a py3 based hg.exe that annoyingly won't run because it can't find python39.dll. It will run tests (the ones without the `python3` shbang line anyway), because the test runner adjusts PATH to include the python running it. Differential Revision: https://phab.mercurial-scm.org/D9361

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        Augie Fackler
    
fuzz: add a fuzzer for xdiff...

              r36697
            
      /*

       * 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>

        Augie Fackler
    
fuzz: use a more standard approach to allow local builds of fuzzers...

              r44265
            
      #include "FuzzedDataProvider.h"

        Augie Fackler
    
fuzz: extract some common utilities and use modern C++ idioms...

              r38191
            
        Augie Fackler
    
fuzz: add a fuzzer for xdiff...

              r36697
            
      extern "C" {

        Augie Fackler
    
fuzz: always define LLVMFuzzerInitialize() even if we don't need it...

              r44261
            
      int LLVMFuzzerInitialize(int *argc, char ***argv)

      {

      	return 0;

      }

        Augie Fackler
    
fuzz: add a fuzzer for xdiff...

              r36697
            
      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)

      {

        Augie Fackler
    
xdiff: don't attempt to use fuzzer inputs larger than 100k...

              r41175
            
      	// Don't allow fuzzer inputs larger than 100k, since we'll just bog

      	// down and not accomplish much.

      	if (Size > 100000) {

      		return 0;

      	}

        Augie Fackler
    
fuzz: migrate xdiff fuzzer to use FuzzedDataProvider...

              r44012
            
      	FuzzedDataProvider provider(Data, Size);

      	std::string left = provider.ConsumeRandomLengthString(Size);

      	std::string right = provider.ConsumeRemainingBytesAsString();

        Augie Fackler
    
fuzz: add a fuzzer for xdiff...

              r36697
            
      	mmfile_t a, b;

        Augie Fackler
    
fuzz: migrate xdiff fuzzer to use FuzzedDataProvider...

              r44012
            
      	a.ptr = (char *)left.c_str();

      	a.size = left.size();

      	b.ptr = (char *)right.c_str();

      	b.size = right.size();

        Augie Fackler
    
fuzz: add a fuzzer for xdiff...

              r36697
            
      	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.

      }

      } // extern "C"

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Augie Fackler fuzz: add a fuzzer for xdiff...	r36697	/*
		* 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>

Augie Fackler fuzz: use a more standard approach to allow local builds of fuzzers...	r44265	#include "FuzzedDataProvider.h"
Augie Fackler fuzz: extract some common utilities and use modern C++ idioms...	r38191
Augie Fackler fuzz: add a fuzzer for xdiff...	r36697	extern "C" {

Augie Fackler fuzz: always define LLVMFuzzerInitialize() even if we don't need it...	r44261	int LLVMFuzzerInitialize(int argc, char **argv)
		{
		return 0;
		}

Augie Fackler fuzz: add a fuzzer for xdiff...	r36697	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)
		{
Augie Fackler xdiff: don't attempt to use fuzzer inputs larger than 100k...	r41175	// Don't allow fuzzer inputs larger than 100k, since we'll just bog
		// down and not accomplish much.
		if (Size > 100000) {
		return 0;
		}
Augie Fackler fuzz: migrate xdiff fuzzer to use FuzzedDataProvider...	r44012	FuzzedDataProvider provider(Data, Size);
		std::string left = provider.ConsumeRandomLengthString(Size);
		std::string right = provider.ConsumeRemainingBytesAsString();
Augie Fackler fuzz: add a fuzzer for xdiff...	r36697	mmfile_t a, b;

Augie Fackler fuzz: migrate xdiff fuzzer to use FuzzedDataProvider...	r44012	a.ptr = (char *)left.c_str();
		a.size = left.size();
		b.ptr = (char *)right.c_str();
		b.size = right.size();
Augie Fackler fuzz: add a fuzzer for xdiff...	r36697	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.
		}

		} // extern "C"