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cosmopolitan/tool/plinko
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Justine Tunney 133c693650 Work around Landlock output inode in compile.com 
This change fixes Landlock Make so that only the output target file is
unveiled, rather than unveiling the directory that contains it. This
gives us a much stronger sandbox. It also helped identify problematic
build code in our repo that should have been using o/tmp instead.

Landlock isn't able to let us unveil files that don't exist. Even if
they do, then once a file is deleted, the sandboxing for it goes away.
This caused problems for Landlock Make because tools like GNU LD will
repeatedly delete and recreate the output file. This change uses the
compile.com wrapper to ensure on changes happen to the output inode.

New binary available on https://justine.lol/make/

Fixes #528
2022-08-09 07:55:44 -07:00
..
lib Remove trailing whitespace from all files (#497) 2022-07-20 20:31:16 -07:00
plinko.c Always initialize thread local storage 2022-07-19 00:21:46 -07:00
plinko.mk Work around Landlock output inode in compile.com 2022-08-09 07:55:44 -07:00
README.txt WIP: Correct all typos (#498) 2022-07-20 14:01:15 -07:00

README.txt 

DESCRIPTION

  plinko is a simple lisp interpreter that takes advantage of advanced
  operating system features irrespective of their practicality such as
  using the nsa instruction popcount for mark sweep garbage collection
  overcommit memory, segment registers, and other dirty hacks that the
  popular interpreters cannot do; this lets plinko gain a considerable
  performance edge while retaining an event greater edge in simplicity

  We hope you find these sources informative, educational, and possibly
  useful too. Lisp source code, written in its dialect is included too
  under //tool/plinko/lib and unit tests which clarify their usage can
  be found in //test/tool/plinko.

BENCHMARK

  binary trees (n=21)

    - sbcl:     200 ms (native jit;  simulated arithmetic)
    - plinko:   400 ms (interpreted; simulated arithmetic)
    - python3:  800 ms (interpreted;    native arithmetic)
    - racket:  1200 ms (interpreted; simulated arithmetic)

AUTHOR

  Justine Alexandra Roberts Tunney <jtunney@gmail.com>

LICENSE

  ISC

SEE ALSO

  SectorLISP
  SectorLambda