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internal/task: use asyncify on webassembly

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This change implements a new "scheduler" for WebAssembly using binaryen's asyncify transform.
This is more reliable than the current "coroutines" transform, and works with non-Go code in the call stack.

runtime (js/wasm): handle scheduler nesting

If WASM calls into JS which calls back into WASM, it is possible for the scheduler to nest.
The event from the callback must be handled immediately, so the task cannot simply be deferred to the outer scheduler.
This creates a minimal scheduler loop which is used to handle such nesting.
This commit is contained in:
Nia Waldvogel
2021-07-21 14:30:01 -04:00
committed by Ron Evans
parent 523d1f28cf
commit 641dcd7c16
31 changed files with 785 additions and 62 deletions
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Makefile
+12 -3
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@@ -54,6 +54,8 @@ ifeq ($(OS),Windows_NT)
CGO_LDFLAGS += -static -static-libgcc -static-libstdc++
CGO_LDFLAGS_EXTRA += -lversion
BINARYEN_OPTION += -DCMAKE_EXE_LINKER_FLAGS='-static-libgcc -static-libstdc++'
LIBCLANG_NAME = libclang
else ifeq ($(shell uname -s),Darwin)
@@ -163,12 +165,18 @@ llvm-source: $(LLVM_PROJECTDIR)/llvm
# Configure LLVM.
TINYGO_SOURCE_DIR=$(shell pwd)
$(LLVM_BUILDDIR)/build.ninja: llvm-source
mkdir -p $(LLVM_BUILDDIR); cd $(LLVM_BUILDDIR); cmake -G Ninja $(TINYGO_SOURCE_DIR)/$(LLVM_PROJECTDIR)/llvm "-DLLVM_TARGETS_TO_BUILD=X86;ARM;AArch64;RISCV;WebAssembly" "-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=AVR;Xtensa" -DCMAKE_BUILD_TYPE=Release -DLIBCLANG_BUILD_STATIC=ON -DLLVM_ENABLE_TERMINFO=OFF -DLLVM_ENABLE_ZLIB=OFF -DLLVM_ENABLE_LIBEDIT=OFF -DLLVM_ENABLE_Z3_SOLVER=OFF -DLLVM_ENABLE_OCAMLDOC=OFF -DLLVM_ENABLE_LIBXML2=OFF -DLLVM_ENABLE_PROJECTS="clang;lld" -DLLVM_TOOL_CLANG_TOOLS_EXTRA_BUILD=OFF -DCLANG_ENABLE_STATIC_ANALYZER=OFF -DCLANG_ENABLE_ARCMT=OFF $(LLVM_OPTION)
mkdir -p $(LLVM_BUILDDIR) && cd $(LLVM_BUILDDIR) && cmake -G Ninja $(TINYGO_SOURCE_DIR)/$(LLVM_PROJECTDIR)/llvm "-DLLVM_TARGETS_TO_BUILD=X86;ARM;AArch64;RISCV;WebAssembly" "-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=AVR;Xtensa" -DCMAKE_BUILD_TYPE=Release -DLIBCLANG_BUILD_STATIC=ON -DLLVM_ENABLE_TERMINFO=OFF -DLLVM_ENABLE_ZLIB=OFF -DLLVM_ENABLE_LIBEDIT=OFF -DLLVM_ENABLE_Z3_SOLVER=OFF -DLLVM_ENABLE_OCAMLDOC=OFF -DLLVM_ENABLE_LIBXML2=OFF -DLLVM_ENABLE_PROJECTS="clang;lld" -DLLVM_TOOL_CLANG_TOOLS_EXTRA_BUILD=OFF -DCLANG_ENABLE_STATIC_ANALYZER=OFF -DCLANG_ENABLE_ARCMT=OFF $(LLVM_OPTION)
# Build LLVM.
$(LLVM_BUILDDIR): $(LLVM_BUILDDIR)/build.ninja
cd $(LLVM_BUILDDIR); ninja $(NINJA_BUILD_TARGETS)
cd $(LLVM_BUILDDIR) && ninja $(NINJA_BUILD_TARGETS)
# Build Binaryen
.PHONY: binaryen
binaryen: build/wasm-opt
build/wasm-opt:
cd lib/binaryen && cmake -G Ninja . -DBUILD_STATIC_LIB=ON $(BINARYEN_OPTION) && ninja
cp lib/binaryen/bin/wasm-opt build/wasm-opt
# Build wasi-libc sysroot
.PHONY: wasi-libc
@@ -476,7 +484,7 @@ endif
wasmtest:
$(GO) test ./tests/wasm
build/release: tinygo gen-device wasi-libc
build/release: tinygo gen-device wasi-libc binaryen
@mkdir -p build/release/tinygo/bin
@mkdir -p build/release/tinygo/lib/clang/include
@mkdir -p build/release/tinygo/lib/CMSIS/CMSIS
@@ -493,6 +501,7 @@ build/release: tinygo gen-device wasi-libc
@mkdir -p build/release/tinygo/pkg/armv7em-unknown-unknown-eabi
@echo copying source files
@cp -p build/tinygo$(EXE) build/release/tinygo/bin
@cp -p build/wasm-opt$(EXE) build/release/tinygo/bin
@cp -p $(abspath $(CLANG_SRC))/lib/Headers/*.h build/release/tinygo/lib/clang/include
@cp -rp lib/CMSIS/CMSIS/Include build/release/tinygo/lib/CMSIS/CMSIS
@cp -rp lib/CMSIS/README.md build/release/tinygo/lib/CMSIS