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Adds ModuleBuilder.ExportGlobalXXX to configure constants (#441)

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See https://github.com/summerwind/the-art-of-webassembly-go/issues/1

Signed-off-by: Adrian Cole <adrian@tetrate.io>
This commit is contained in:
Crypt Keeper
2022-04-05 15:41:19 +08:00
committed by GitHub
parent 9345a89bea
commit b1cffcc58e
8 changed files with 394 additions and 51 deletions
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197
builder_test.go
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@@ -8,6 +8,7 @@ import (
"github.com/stretchr/testify/require"
"github.com/tetratelabs/wazero/api"
"github.com/tetratelabs/wazero/internal/leb128"
"github.com/tetratelabs/wazero/internal/wasm"
)
@@ -43,18 +44,6 @@ func TestNewModuleBuilder_Build(t *testing.T) {
},
expected: &wasm.Module{NameSection: &wasm.NameSection{ModuleName: "env"}},
},
{
name: "ExportMemory",
input: func(r Runtime) ModuleBuilder {
return r.NewModuleBuilder("").ExportMemory("memory", 1)
},
expected: &wasm.Module{
MemorySection: &wasm.Memory{Min: 1, Max: wasm.MemoryMaxPages},
ExportSection: map[string]*wasm.Export{
"memory": {Name: "memory", Type: wasm.ExternTypeMemory, Index: 0},
},
},
},
{
name: "ExportFunction",
input: func(r Runtime) ModuleBuilder {
@@ -164,6 +153,190 @@ func TestNewModuleBuilder_Build(t *testing.T) {
},
},
},
{
name: "ExportMemory",
input: func(r Runtime) ModuleBuilder {
return r.NewModuleBuilder("").ExportMemory("memory", 1)
},
expected: &wasm.Module{
MemorySection: &wasm.Memory{Min: 1, Max: wasm.MemoryMaxPages},
ExportSection: map[string]*wasm.Export{
"memory": {Name: "memory", Type: wasm.ExternTypeMemory, Index: 0},
},
},
},
{
name: "ExportMemory overwrites",
input: func(r Runtime) ModuleBuilder {
return r.NewModuleBuilder("").ExportMemory("memory", 1).ExportMemory("memory", 2)
},
expected: &wasm.Module{
MemorySection: &wasm.Memory{Min: 2, Max: wasm.MemoryMaxPages},
ExportSection: map[string]*wasm.Export{
"memory": {Name: "memory", Type: wasm.ExternTypeMemory, Index: 0},
},
},
},
{
name: "ExportMemoryWithMax",
input: func(r Runtime) ModuleBuilder {
return r.NewModuleBuilder("").ExportMemoryWithMax("memory", 1, 1)
},
expected: &wasm.Module{
MemorySection: &wasm.Memory{Min: 1, Max: 1},
ExportSection: map[string]*wasm.Export{
"memory": {Name: "memory", Type: wasm.ExternTypeMemory, Index: 0},
},
},
},
{
name: "ExportMemoryWithMax overwrites",
input: func(r Runtime) ModuleBuilder {
return r.NewModuleBuilder("").ExportMemoryWithMax("memory", 1, 1).ExportMemoryWithMax("memory", 1, 2)
},
expected: &wasm.Module{
MemorySection: &wasm.Memory{Min: 1, Max: 2},
ExportSection: map[string]*wasm.Export{
"memory": {Name: "memory", Type: wasm.ExternTypeMemory, Index: 0},
},
},
},
{
name: "ExportGlobalI32",
input: func(r Runtime) ModuleBuilder {
return r.NewModuleBuilder("").ExportGlobalI32("canvas_width", 1024)
},
expected: &wasm.Module{
GlobalSection: []*wasm.Global{
{
Type: &wasm.GlobalType{ValType: wasm.ValueTypeI32},
Init: &wasm.ConstantExpression{Opcode: wasm.OpcodeI32Const, Data: leb128.EncodeUint32(1024)},
},
},
ExportSection: map[string]*wasm.Export{
"canvas_width": {Name: "canvas_width", Type: wasm.ExternTypeGlobal, Index: 0},
},
},
},
{
name: "ExportGlobalI32 overwrites",
input: func(r Runtime) ModuleBuilder {
return r.NewModuleBuilder("").ExportGlobalI32("canvas_width", 1024).ExportGlobalI32("canvas_width", 2048)
},
expected: &wasm.Module{
GlobalSection: []*wasm.Global{
{
Type: &wasm.GlobalType{ValType: wasm.ValueTypeI32},
Init: &wasm.ConstantExpression{Opcode: wasm.OpcodeI32Const, Data: leb128.EncodeUint32(2048)},
},
},
ExportSection: map[string]*wasm.Export{
"canvas_width": {Name: "canvas_width", Type: wasm.ExternTypeGlobal, Index: 0},
},
},
},
{
name: "ExportGlobalI64",
input: func(r Runtime) ModuleBuilder {
return r.NewModuleBuilder("").ExportGlobalI64("start_epoch", 1620216263544)
},
expected: &wasm.Module{
GlobalSection: []*wasm.Global{
{
Type: &wasm.GlobalType{ValType: wasm.ValueTypeI64},
Init: &wasm.ConstantExpression{Opcode: wasm.OpcodeI64Const, Data: leb128.EncodeUint64(1620216263544)},
},
},
ExportSection: map[string]*wasm.Export{
"start_epoch": {Name: "start_epoch", Type: wasm.ExternTypeGlobal, Index: 0},
},
},
},
{
name: "ExportGlobalI64 overwrites",
input: func(r Runtime) ModuleBuilder {
return r.NewModuleBuilder("").ExportGlobalI64("start_epoch", 1620216263544).ExportGlobalI64("start_epoch", 1620216263544000)
},
expected: &wasm.Module{
GlobalSection: []*wasm.Global{
{
Type: &wasm.GlobalType{ValType: wasm.ValueTypeI64},
Init: &wasm.ConstantExpression{Opcode: wasm.OpcodeI64Const, Data: leb128.EncodeUint64(1620216263544000)},
},
},
ExportSection: map[string]*wasm.Export{
"start_epoch": {Name: "start_epoch", Type: wasm.ExternTypeGlobal, Index: 0},
},
},
},
{
name: "ExportGlobalF32",
input: func(r Runtime) ModuleBuilder {
return r.NewModuleBuilder("").ExportGlobalF32("math/pi", 3.1415926536)
},
expected: &wasm.Module{
GlobalSection: []*wasm.Global{
{
Type: &wasm.GlobalType{ValType: wasm.ValueTypeF32},
Init: &wasm.ConstantExpression{Opcode: wasm.OpcodeF32Const, Data: leb128.EncodeUint64(api.EncodeF32(3.1415926536))},
},
},
ExportSection: map[string]*wasm.Export{
"math/pi": {Name: "math/pi", Type: wasm.ExternTypeGlobal, Index: 0},
},
},
},
{
name: "ExportGlobalF32 overwrites",
input: func(r Runtime) ModuleBuilder {
return r.NewModuleBuilder("").ExportGlobalF32("math/pi", 3.1415926536).ExportGlobalF32("math/pi", 3.14159)
},
expected: &wasm.Module{
GlobalSection: []*wasm.Global{
{
Type: &wasm.GlobalType{ValType: wasm.ValueTypeF32},
Init: &wasm.ConstantExpression{Opcode: wasm.OpcodeF32Const, Data: leb128.EncodeUint64(api.EncodeF32(3.14159))},
},
},
ExportSection: map[string]*wasm.Export{
"math/pi": {Name: "math/pi", Type: wasm.ExternTypeGlobal, Index: 0},
},
},
},
{
name: "ExportGlobalF64",
input: func(r Runtime) ModuleBuilder {
return r.NewModuleBuilder("").ExportGlobalF64("math/pi", math.Pi)
},
expected: &wasm.Module{
GlobalSection: []*wasm.Global{
{
Type: &wasm.GlobalType{ValType: wasm.ValueTypeF64},
Init: &wasm.ConstantExpression{Opcode: wasm.OpcodeF64Const, Data: leb128.EncodeUint64(api.EncodeF64(math.Pi))},
},
},
ExportSection: map[string]*wasm.Export{
"math/pi": {Name: "math/pi", Type: wasm.ExternTypeGlobal, Index: 0},
},
},
},
{
name: "ExportGlobalF64 overwrites",
input: func(r Runtime) ModuleBuilder {
return r.NewModuleBuilder("").ExportGlobalF64("math/pi", math.Pi).ExportGlobalF64("math/pi", 3.14159)
},
expected: &wasm.Module{
GlobalSection: []*wasm.Global{
{
Type: &wasm.GlobalType{ValType: wasm.ValueTypeF64},
Init: &wasm.ConstantExpression{Opcode: wasm.OpcodeF64Const, Data: leb128.EncodeUint64(api.EncodeF64(3.14159))},
},
},
ExportSection: map[string]*wasm.Export{
"math/pi": {Name: "math/pi", Type: wasm.ExternTypeGlobal, Index: 0},
},
},
},
}
for _, tt := range tests {