Commit Graph

19 Commits (db33973e0aae7ffc2537991e372e3fc5e59608a7)

Author SHA1 Message Date
Justine Tunney db33973e0a Get fork() working on Windows
This is done without using Microsoft's internal APIs. MAP_PRIVATE
mappings are copied to the subprocess via a pipe, since Microsoft
doesn't want us to have proper COW pages. MAP_SHARED mappings are
remapped without needing to do any copying. Global variables need
copying along with the stack and the whole heap of anonymous mem.
This actually improves the reliability of the redbean http server
although one shouldn't expect 10k+ connections on a home computer
that isn't running software built to serve like Linux or FreeBSD.
2020-11-13 03:14:39 -08:00
Justine Tunney 2d80bbc802 Get binaries closer to running without an o/s
blinkenlights now does a pretty good job emulating what happens when
binaries boot from BIOS into long mode. So it's been much easier to
debug the bare metal process and wrinkle out many issues.
2020-11-02 19:12:47 -08:00
Justine Tunney feed0d2b0e Add minor improvements and cleanup 2020-10-27 03:39:46 -07:00
Justine Tunney 9e3e985ae5 Make terminal ui binaries work well everywhere
Here's some screenshots of an emulator tui program that was compiled on
Linux, then scp'd it to Windows, Mac, and FreeBSD.

https://justine.storage.googleapis.com/blinkenlights-cmdexe.png
https://justine.storage.googleapis.com/blinkenlights-imac.png
https://justine.storage.googleapis.com/blinkenlights-freebsd.png
https://justine.storage.googleapis.com/blinkenlights-lisp.png

How is this even possible that we have a nontrivial ui binary that just
works on Mac, Windows, Linux, and BSD? Surely a first ever achievement.

Fixed many bugs. Bootstrapped John McCarthy's metacircular evaluator on
bare metal in half the size of Altair BASIC (about 2.5kb) and ran it in
emulator for fun and profit.
2020-10-19 06:38:31 -07:00
Justine Tunney 680daf1210 Fix build/test breakage caused by last commit 2020-10-06 12:16:17 -07:00
Justine Tunney c45e46f871 Add fixes performance and static web server 2020-10-05 23:11:49 -07:00
Justine Tunney b6793d42d5 Add The LISP Challenge
This change introduces a 2.5kb program that's comes pretty close so far
to bootstrapping John McCarthy's metacircular evaluator on bare metal.
2020-10-01 01:20:13 -07:00
Justine Tunney 23d333c090 Make more improvements
This change includes many bug fixes, for the NT polyfills, strings,
memory, boot, and math libraries which were discovered by adding more
tools for recreational programming, such as PC emulation. Lemon has also
been vendored because it works so well at parsing languages.
2020-09-28 01:20:34 -07:00
Justine Tunney 416fd86676 Make improvements
- Emulator can now test the αcτµαlly pδrταblε εxεcµταblε bootloader

- Whipped up a webserver named redbean. It services 150k requests per
  second on a single core. Bundling assets inside zip enables extremely
  fast serving for two reasons. The first is that zip central directory
  lookups go faster than stat() system calls. The second is that both
  zip and gzip content-encoding use DEFLATE, therefore, compressed
  responses can be served via the sendfile() system call which does an
  in-kernel copy directly from the zip executable structure. Also note
  that red bean zip executables can be deployed easily to all platforms,
  since these native executables work on Linux, Mac, BSD, and Windows.

- Address sanitizer now works very well
2020-09-14 00:02:34 -07:00
Justine Tunney 7327c345f9 Get address sanitizer mostly working 2020-09-03 05:44:37 -07:00
Justine Tunney bd29223891 Fix bugs and have emulator emulate itself 2020-08-31 05:17:31 -07:00
Justine Tunney 5aabacb361 Add pseudoteletypewriter to emulator
https://justine.storage.googleapis.com/emulator628.mp4
2020-08-29 23:51:09 -07:00
Justine Tunney e86cff8ba0 Fix printvideo regression and minor improvements 2020-08-26 09:41:07 -07:00
Justine Tunney f4f4caab0e Add x86_64-linux-gnu emulator
I wanted a tiny scriptable meltdown proof way to run userspace programs
and visualize how program execution impacts memory. It helps to explain
how things like Actually Portable Executable works. It can show you how
the GCC generated code is going about manipulating matrices and more. I
didn't feel fully comfortable with Qemu and Bochs because I'm not smart
enough to understand them. I wanted something like gVisor but with much
stronger levels of assurances. I wanted a single binary that'll run, on
all major operating systems with an embedded GPL barrier ZIP filesystem
that is tiny enough to transpile to JavaScript and run in browsers too.

https://justine.storage.googleapis.com/emulator625.mp4
2020-08-25 04:43:42 -07:00
Justine Tunney ac00be1a4e Make small fixes and oops ran clang-format on dtoa 2020-06-30 19:55:47 -07:00
Justine Tunney d51409ccd9 Add glob and some finer tuning of documentation 2020-06-21 15:23:35 -07:00
Justine Tunney 799e24a87b Reduce build log verbosity with preprocessor trick 2020-06-18 23:07:58 -07:00
Justine Tunney 2e979c00c3 Polish up repository and other revisions 2020-06-16 06:38:43 -07:00
Justine Tunney c91b3c5006 Initial import 2020-06-15 07:18:57 -07:00