upstream/mercurial-mirror Files · contrib/fuzz/README.rst

procutil: avoid `+= None` when writing to full std{err,out} descriptor on py3...

procutil: avoid `+= None` when writing to full std{err,out} descriptor on py3 The write function returns `None` if there was no room to write the given data[1]. I don't like that this is effectively an infinite loop if there's never any progress emptying the underlying buffer, but we're no worse off than before, and it fixes random stacktrace popups seen in the py3 build of TortoiseHg. [1] https://docs.python.org/3/library/io.html#io.RawIOBase.write Differential Revision: https://phab.mercurial-scm.org/D12555

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        Augie Fackler
    
fuzz: add a quick README to try and document how to test new fuzzers...

              r36698
            
      How to add fuzzers (partially cribbed from oss-fuzz[0]):

        1) git clone https://github.com/google/oss-fuzz

        2) cd oss-fuzz

        3) python infra/helper.py build_image mercurial

        4) docker run --cap-add=SYS_PTRACE -it -v $HG_REPO_PATH:/hg-new \

               gcr.io/oss-fuzz/mercurial bash

        5) cd /src

        6) rm -r mercurial

        7) ln -s /hg-new mercurial

        8) cd mercurial

        9) compile

        Augie Fackler
    
fuzz: add some more docs about building/running fuzzers...

              r36716
            
        10) ls $OUT

      Step 9 is literally running the command "compile", which is part of

      the docker container. Once you have that working, you can build the

      fuzzers like this (in the oss-fuzz repo):

      python infra/helper.py build_fuzzers --sanitizer address mercurial $HG_REPO_PATH

      (you can also say "memory", "undefined" or "coverage" for

      sanitizer). Then run the built fuzzers like this:

      python infra/helper.py run_fuzzer mercurial -- $FUZZER

        Augie Fackler
    
fuzz: add a quick README to try and document how to test new fuzzers...

              r36698
            
      0: https://github.com/google/oss-fuzz/blob/master/docs/new_project_guide.md

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Augie Fackler fuzz: add a quick README to try and document how to test new fuzzers...	r36698	How to add fuzzers (partially cribbed from oss-fuzz[0]):

		1) git clone https://github.com/google/oss-fuzz
		2) cd oss-fuzz
		3) python infra/helper.py build_image mercurial
		4) docker run --cap-add=SYS_PTRACE -it -v $HG_REPO_PATH:/hg-new \
		gcr.io/oss-fuzz/mercurial bash
		5) cd /src
		6) rm -r mercurial
		7) ln -s /hg-new mercurial
		8) cd mercurial
		9) compile
Augie Fackler fuzz: add some more docs about building/running fuzzers...	r36716	10) ls $OUT

		Step 9 is literally running the command "compile", which is part of
		the docker container. Once you have that working, you can build the
		fuzzers like this (in the oss-fuzz repo):

		python infra/helper.py build_fuzzers --sanitizer address mercurial $HG_REPO_PATH

		(you can also say "memory", "undefined" or "coverage" for
		sanitizer). Then run the built fuzzers like this:

		python infra/helper.py run_fuzzer mercurial -- $FUZZER
Augie Fackler fuzz: add a quick README to try and document how to test new fuzzers...	r36698
		0: https://github.com/google/oss-fuzz/blob/master/docs/new_project_guide.md