import Builder from '../Builder.js'; import * as assert from '../assert.js'; const pageSize = 64 * 1024; const maxPageCount = (2**32) / pageSize; function binaryShouldNotParse(builder, msg = "") { const bin = builder.WebAssembly().get(); let threw = false; try { const module = new WebAssembly.Module(bin); } catch(e) { assert.truthy(e instanceof WebAssembly.CompileError); if (msg) assert.truthy(e.message.indexOf(msg) !== -1); threw = true; } assert.truthy(threw); } { // Can't grow_memory if no memory is defined. const builder = (new Builder()) .Type().End() .Function().End() .Export().End() .Code() .Function({ret: "void", params: []}) .I32Const(25) .GrowMemory(0) .Drop() .End() .End(); binaryShouldNotParse(builder, "grow_memory is only valid if a memory is defined or imported"); } { // Can't current_memory if no memory is defined. const builder = (new Builder()) .Type().End() .Function().End() .Export().End() .Code() .Function({ret: "void", params: []}) .I32Const(25) .CurrentMemory(0) .Drop() .End() .End(); binaryShouldNotParse(builder, "current_memory is only valid if a memory is defined or imported"); } { const builder = (new Builder()) .Type().End() .Function().End() .Memory().InitialMaxPages(1, 1).End() .Export().End() .Code() .Function({ret: "void", params: []}) .I32Const(25) .GrowMemory(1) .Drop() .End() .End(); binaryShouldNotParse(builder, "reserved varUint1 for grow_memory must be zero"); } { const builder = (new Builder()) .Type().End() .Function().End() .Memory().InitialMaxPages(1, 1).End() .Export().End() .Code() .Function({ret: "void", params: []}) .I32Const(25) .CurrentMemory(1) .Drop() .End() .End(); binaryShouldNotParse(builder, "reserved varUint1 for current_memory must be zero"); } { const builder = (new Builder()) .Type().End() .Function().End() .Memory().InitialMaxPages(1, 1).End() .Export().End() .Code() .Function({ret: "void", params: []}) .I32Const(25) .CurrentMemory(0xffffff00) .Drop() .End() .End(); binaryShouldNotParse(builder, "can't parse reserved varUint1 for current_memory"); } { const builder = (new Builder()) .Type().End() .Function().End() .Memory().InitialMaxPages(1, 1).End() .Export().End() .Code() .Function({ret: "void", params: []}) .I32Const(25) .GrowMemory(0xffffff00) .Drop() .End() .End(); binaryShouldNotParse(builder, "can't parse reserved varUint1 for grow_memory"); } { const memoryDescription = {initial: 20, maximum: 50}; const builder = (new Builder()) .Type().End() .Import().Memory("imp", "memory", memoryDescription).End() .Function().End() .Export() .Function("foo") .End() .Code() .Function("foo", { params: ["i32"], ret: "i32"}) .GetLocal(0) .GrowMemory(0) .Return() .End() .End(); const bin = builder.WebAssembly().get(); const module = new WebAssembly.Module(bin); const instance = new WebAssembly.Instance(module, {imp: {memory: new WebAssembly.Memory(memoryDescription)}}); let currentPageSize = memoryDescription.initial; for (let i = 0; i < memoryDescription.maximum - memoryDescription.initial; i++) { assert.eq(instance.exports.foo(1), currentPageSize); ++currentPageSize; } for (let i = 0; i < 1000; i++) { assert.eq(instance.exports.foo(1), -1); assert.eq(instance.exports.foo(0), currentPageSize); } } { const memoryDescription = {initial: 20, maximum: 100}; const builder = (new Builder()) .Type().End() .Import().Memory("imp", "memory", memoryDescription).End() .Function().End() .Export() .Function("foo") .End() .Code() .Function("foo", { params: [], ret: "i32"}) .CurrentMemory(0) .Return() .End() .End(); const bin = builder.WebAssembly().get(); const module = new WebAssembly.Module(bin); const memory = new WebAssembly.Memory(memoryDescription); const instance = new WebAssembly.Instance(module, {imp: {memory}}); let currentPageSize = memoryDescription.initial; for (let i = 0; i < memoryDescription.maximum - memoryDescription.initial; i++) { assert.eq(instance.exports.foo(), currentPageSize); ++currentPageSize; memory.grow(1); } } { const memoryDescription = {initial: 20, maximum: 100}; const builder = (new Builder()) .Type().End() .Import().Memory("imp", "memory", memoryDescription).End() .Function().End() .Export() .Function("foo") .End() .Code() .Function("foo", { params: [], ret: "i32"}) .I32Const(-1) .GrowMemory(0) .Return() .End() .End(); const bin = builder.WebAssembly().get(); const module = new WebAssembly.Module(bin); const memory = new WebAssembly.Memory(memoryDescription); const instance = new WebAssembly.Instance(module, {imp: {memory}}); for (let i = 0; i < 20; i++) { assert.eq(instance.exports.foo(), -1); } }