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6 Коммитов

Автор SHA1 Сообщение Дата
Yuta Saito dff70b50d0 [wasm] vm.c: stop unwinding to main for every vm_exec call by setjmp
the original rb_wasm_setjmp implementation always unwinds to the root
call frame to have setjmp compatible interface, and simulate sjlj's
undefined behavior. Therefore, every vm_exec call unwinds to main, and
a deep call stack makes setjmp call very expensive. The following
snippet from optcarrot takes 5s even though it takes less than 0.3s on
native.

```
[0x0, 0x4, 0x8, 0xc].map do |attr|
  (0..7).map do |j|
    (0...0x10000).map do |i|
      clr = i[15 - j] * 2 + i[7 - j]
      clr != 0 ? attr | clr : 0
    end
  end
end
```

This patch adds a WASI specialized vm_exec which uses lightweight
try-catch API without unwinding to the root frame. After this patch, the
above snippet takes only 0.5s.
2022-02-18 18:28:18 +09:00
git a892e5599e * expand tabs. [ci skip]
Tabs were expanded because the file did not have any tab indentation in unedited lines.
Please update your editor config, and use misc/expand_tabs.rb in the pre-commit hook.
2022-01-19 11:19:20 +09:00
Yuta Saito 4f579ecfce [wasm] wasm/README.md: write a brief instruction to cross build 2022-01-19 11:19:06 +09:00
Yuta Saito f72f01abd8 [wasm] add unit test suite for fiber, register scan, sjlj in platform dir 2022-01-19 11:19:06 +09:00
Yuta Saito 7ee786388a [wasm] wasm/missing.{c,h}: add missing libc stubs for wasi-libc 2022-01-19 11:19:06 +09:00
Yuta Saito 65f95f26ff [wasm] add asyncify based setjmp, fiber, register scan emulation
configure.ac: setup build tools and register objects

main.c: wrap main with rb_wasm_rt_start to handle asyncify unwinds

tool/m4/ruby_wasm_tools.m4: setup default command based on WASI_SDK_PATH
environment variable. checks wasm-opt which is used for asyncify.

tool/wasm-clangw wasm/wasm-opt: a clang wrapper which replaces real
wasm-opt with do-nothing wasm-opt to avoid misoptimization before
asyncify. asyncify is performed at POSTLINK, but clang linker driver
tries to run optimization by wasm-opt unconditionally. inlining pass
at wasm level breaks asyncify's assumption, so should not optimize
before POSTLIK.

wasm/GNUmakefile.in: wasm specific rules to compile objects
2022-01-19 11:19:06 +09:00