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

doc: use an absolute path in sys.path to work around a python DLL loading bug...

doc: use an absolute path in sys.path to work around a python DLL loading bug This bug[1] was causing the zstd entry under "Available Compression Engines" to be omitted from the documentation for some versions of python3. I could upgrade, but past upgrades have broken venvs and clobbered installed packages. It's a trivial workaround, so there's no sense in leaving this subtle issue. It was flushed out by changing the module policy here from 'allow' to 'c', and seeing this error: ImportError: DLL load failed while importing parsers: The parameter is incorrect. [1] https://github.com/python/cpython/issues/87271 Differential Revision: https://phab.mercurial-scm.org/D12599

Augie Fackler - - Load All Authors

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      #include <Python.h>

      #include <assert.h>

      #include <stdlib.h>

      #include <unistd.h>

      #include "pyutil.h"

      #include <string>

      extern "C" {

      static PYCODETYPE *code;

      extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv)

      {

      	contrib::initpy(*argv[0]);

      	code = (PYCODETYPE *)Py_CompileString(R"py(

      try:

        files = mdata.split('\n')

        d = parsers.dirs(files)

        list(d)

        'a' in d

        if files:

          files[0] in d

      except Exception as e:

        pass

        # uncomment this print if you're editing this Python code

        # to debug failures.

        # print e

      )py",

      	                                      "fuzzer", Py_file_input);

      	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;

      	}

      	PyObject *mtext =

      	    PyBytes_FromStringAndSize((const char *)Data, (Py_ssize_t)Size);

      	PyObject *locals = PyDict_New();

      	PyDict_SetItemString(locals, "mdata", mtext);

      	PyObject *res = PyEval_EvalCode(code, contrib::pyglobals(), locals);

      	if (!res) {

      		PyErr_Print();

      	}

      	Py_XDECREF(res);

      	Py_DECREF(locals);

      	Py_DECREF(mtext);

      	return 0; // Non-zero return values are reserved for future use.

      }

      }

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				#include <Python.h>
				#include <assert.h>
				#include <stdlib.h>
				#include <unistd.h>

				#include "pyutil.h"

				#include <string>

				extern "C" {

				static PYCODETYPE *code;

				extern "C" int LLVMFuzzerInitialize(int argc, char **argv)
				{
				contrib::initpy(*argv[0]);
				code = (PYCODETYPE *)Py_CompileString(R"py(
				try:
				files = mdata.split('\n')
				d = parsers.dirs(files)
				list(d)
				'a' in d
				if files:
				files[0] in d
				except Exception as e:
				pass
				# uncomment this print if you're editing this Python code
				# to debug failures.
				# print e
				)py",
				"fuzzer", Py_file_input);
				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;
				}
				PyObject *mtext =
				PyBytes_FromStringAndSize((const char *)Data, (Py_ssize_t)Size);
				PyObject *locals = PyDict_New();
				PyDict_SetItemString(locals, "mdata", mtext);
				PyObject *res = PyEval_EvalCode(code, contrib::pyglobals(), locals);
				if (!res) {
				PyErr_Print();
				}
				Py_XDECREF(res);
				Py_DECREF(locals);
				Py_DECREF(mtext);
				return 0; // Non-zero return values are reserved for future use.
				}
				}