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Supports functions with multiple results (multi-value) (#446)

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Signed-off-by: Adrian Cole <adrian@tetrate.io>
Signed-off-by: Takeshi Yoneda <takeshi@tetrate.io>
This commit is contained in:
Crypt Keeper
2022-04-13 09:22:39 +08:00
committed by GitHub
parent 927914ffb0
commit c3ff16d596
68 changed files with 5555 additions and 1155 deletions
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44
config.go
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@@ -16,25 +16,25 @@ import (
// RuntimeConfig controls runtime behavior, with the default implementation as NewRuntimeConfig
type RuntimeConfig struct {
newEngine func() wasm.Engine
ctx context.Context
enabledFeatures wasm.Features
newEngine func(wasm.Features) wasm.Engine
ctx context.Context
memoryMaxPages uint32
}
// engineLessConfig helps avoid copy/pasting the wrong defaults.
var engineLessConfig = &RuntimeConfig{
ctx: context.Background(),
enabledFeatures: wasm.Features20191205,
ctx: context.Background(),
memoryMaxPages: wasm.MemoryMaxPages,
}
// clone ensures all fields are coped even if nil.
func (c *RuntimeConfig) clone() *RuntimeConfig {
return &RuntimeConfig{
enabledFeatures: c.enabledFeatures,
newEngine: c.newEngine,
ctx: c.ctx,
enabledFeatures: c.enabledFeatures,
memoryMaxPages: c.memoryMaxPages,
}
}
@@ -89,10 +89,23 @@ func (c *RuntimeConfig) WithMemoryMaxPages(memoryMaxPages uint32) *RuntimeConfig
return ret
}
// WithFinishedFeatures enables currently supported "finished" feature proposals. Use this to improve compatibility with
// tools that enable all features by default.
//
// Note: The features implied can vary and can lead to unpredictable behavior during updates.
// Note: This only includes "finished" features, but "finished" is not an official W3C term: it is possible that
// "finished" features do not make the next W3C recommended WebAssembly core specification.
// See https://github.com/WebAssembly/spec/tree/main/proposals
func (c *RuntimeConfig) WithFinishedFeatures() *RuntimeConfig {
ret := c.clone()
ret.enabledFeatures = wasm.FeaturesFinished
return ret
}
// WithFeatureMutableGlobal allows globals to be mutable. This defaults to true as the feature was finished in
// WebAssembly 1.0 (20191205).
//
// When false, a api.Global can never be cast to a api.MutableGlobal, and any source that includes global vars
// When false, an api.Global can never be cast to an api.MutableGlobal, and any source that includes global vars
// will fail to parse.
func (c *RuntimeConfig) WithFeatureMutableGlobal(enabled bool) *RuntimeConfig {
ret := c.clone()
@@ -100,8 +113,11 @@ func (c *RuntimeConfig) WithFeatureMutableGlobal(enabled bool) *RuntimeConfig {
return ret
}
// WithFeatureSignExtensionOps enables sign-extend operations. This defaults to false as the feature was not finished in
// WebAssembly 1.0 (20191205).
// WithFeatureSignExtensionOps enables sign extension instructions ("sign-extension-ops"). This defaults to false as the
// feature was not finished in WebAssembly 1.0 (20191205).
//
// This has the following effects:
// * Adds instructions `i32.extend8_s`, `i32.extend16_s`, `i64.extend8_s`, `i64.extend16_s` and `i64.extend32_s`
//
// See https://github.com/WebAssembly/spec/blob/main/proposals/sign-extension-ops/Overview.md
func (c *RuntimeConfig) WithFeatureSignExtensionOps(enabled bool) *RuntimeConfig {
@@ -110,6 +126,20 @@ func (c *RuntimeConfig) WithFeatureSignExtensionOps(enabled bool) *RuntimeConfig
return ret
}
// WithFeatureMultiValue enables multiple values ("multi-value"). This defaults to false as the feature was not finished
// in WebAssembly 1.0 (20191205).
//
// This has the following effects:
// * Function (`func`) types allow more than one result
// * Block types (`block`, `loop` and `if`) can be arbitrary function types
//
// See https://github.com/WebAssembly/spec/blob/main/proposals/multi-value/Overview.md
func (c *RuntimeConfig) WithFeatureMultiValue(enabled bool) *RuntimeConfig {
ret := c.clone()
ret.enabledFeatures = ret.enabledFeatures.Set(wasm.FeatureMultiValue, enabled)
return ret
}
// CompiledCode is a WebAssembly 1.0 (20191205) module ready to be instantiated (Runtime.InstantiateModule) as an\
// api.Module.
//