support WASI target (#1373)

* initial commit for WASI support

* merge "time" package with wasi build tag
* override syscall package with wasi build tag
* create runtime_wasm_{js,wasi}.go files
* create syscall_wasi.go file
* create time/zoneinfo_wasi.go file as the replacement of zoneinfo_js.go
* add targets/wasi.json target

* set visbility hidden for runtime extern variables

Accodring to the WASI docs (https://github.com/WebAssembly/WASI/blob/master/design/application-abi.md#current-unstable-abi),
none of exports of WASI executable(Command) should no be accessed.

v0.19.0 of bytecodealliance/wasmetime, which is often refered to as the reference implementation of WASI,
does not accept any exports except functions and the only limited variables like "table", "memory".

* merge syscall_{baremetal,wasi}.go

* fix js target build

* mv wasi functions to syscall/wasi && implement sleepTicks

* WASI: set visibility hidden for globals variables

* mv back syscall/wasi/* to runtime package

* WASI: add test

* unexport wasi types

* WASI test: fix wasmtime path

* stop changing visibility of runtime.alloc

* use GOOS=linux, GOARCH=arm for wasi target

Signed-off-by: mathetake <[email protected]>

* WASI: fix build tags for os/runtime packages

Signed-off-by: mathetake <[email protected]>

* run WASI test only on Linux

Signed-off-by: mathetake <[email protected]>

* set InternalLinkage instead of changing visibility

Signed-off-by: mathetake <[email protected]>

1 files changed, 9 insertions, 1 deletions

diff --git a/main_test.go b/main_test.go
index f66117b90..ac01baafa 100644
--- a/main_test.go
+++ b/main_test.go
@@ -98,6 +98,10 @@ func TestCompiler(t *testing.T) {
 				runPlatTests("wasm", matches, t)
 			})
 		}
+
+		t.Run("WASI", func(t *testing.T) {
+			runPlatTests("wasi", matches, t)
+		})
 	}
 }
 
@@ -109,7 +113,6 @@ func runPlatTests(target string, matches []string, t *testing.T) {
 
 		t.Run(filepath.Base(path), func(t *testing.T) {
 			t.Parallel()
-
 			runTest(path, target, t)
 		})
 	}
@@ -161,6 +164,11 @@ func runTest(path, target string, t *testing.T) {
 		PrintSizes: "",
 		WasmAbi:    "js",
 	}
+
+	if target == "wasi" {
+		config.WasmAbi = "generic"
+	}
+
 	binary := filepath.Join(tmpdir, "test")
 	err = runBuild("./"+path, binary, config)
 	if err != nil {