| // Copyright 2018 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Flags: --expose-wasm --experimental-wasm-eh --allow-natives-syntax |
| |
| load("test/mjsunit/wasm/wasm-module-builder.js"); |
| load("test/mjsunit/wasm/exceptions-utils.js"); |
| |
| // First we just test that "exnref" local variables are allowed. |
| (function TestLocalExnRef() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| builder.addFunction("push_and_drop_exnref", kSig_v_v) |
| .addLocals(kWasmExnRef, 1) |
| .addBody([ |
| kExprLocalGet, 0, |
| kExprDrop, |
| ]).exportFunc(); |
| let instance = builder.instantiate(); |
| |
| assertDoesNotThrow(instance.exports.push_and_drop_exnref); |
| })(); |
| |
| // The following method doesn't attempt to catch an raised exception. |
| (function TestThrowSimple() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| let except = builder.addException(kSig_v_v); |
| builder.addFunction("throw_if_param_not_zero", kSig_i_i) |
| .addBody([ |
| kExprLocalGet, 0, |
| kExprI32Const, 0, |
| kExprI32Ne, |
| kExprIf, kWasmStmt, |
| kExprThrow, except, |
| kExprEnd, |
| kExprI32Const, 1 |
| ]).exportFunc(); |
| let instance = builder.instantiate(); |
| |
| assertEquals(1, instance.exports.throw_if_param_not_zero(0)); |
| assertWasmThrows(instance, except, [], () => instance.exports.throw_if_param_not_zero(10)); |
| assertWasmThrows(instance, except, [], () => instance.exports.throw_if_param_not_zero(-1)); |
| })(); |
| |
| // Test that empty try/catch blocks work. |
| (function TestCatchEmptyBlocks() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| builder.addFunction("catch_empty_try", kSig_v_v) |
| .addBody([ |
| kExprTry, kWasmStmt, |
| kExprCatch, |
| kExprDrop, |
| kExprEnd, |
| ]).exportFunc(); |
| let instance = builder.instantiate(); |
| |
| assertDoesNotThrow(instance.exports.catch_empty_try); |
| })(); |
| |
| // Now that we know throwing works, we test catching the exceptions we raise. |
| (function TestCatchSimple() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| let except = builder.addException(kSig_v_v); |
| builder.addFunction("simple_throw_catch_to_0_1", kSig_i_i) |
| .addBody([ |
| kExprTry, kWasmI32, |
| kExprLocalGet, 0, |
| kExprI32Eqz, |
| kExprIf, kWasmStmt, |
| kExprThrow, except, |
| kExprEnd, |
| kExprI32Const, 42, |
| kExprCatch, |
| kExprDrop, |
| kExprI32Const, 23, |
| kExprEnd |
| ]).exportFunc(); |
| let instance = builder.instantiate(); |
| |
| assertEquals(23, instance.exports.simple_throw_catch_to_0_1(0)); |
| assertEquals(42, instance.exports.simple_throw_catch_to_0_1(1)); |
| })(); |
| |
| (function TestTrapNotCaught() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| builder.addFunction('unreachable_in_try', kSig_v_v) |
| .addBody([ |
| kExprTry, kWasmStmt, |
| kExprUnreachable, |
| kExprCatch, |
| kExprDrop, |
| kExprEnd |
| ]).exportFunc(); |
| let instance = builder.instantiate(); |
| |
| assertTraps(kTrapUnreachable, () => instance.exports.unreachable_in_try()); |
| })(); |
| |
| (function TestTrapInCalleeNotCaught() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| let func_div = builder.addFunction('div', kSig_i_ii).addBody([ |
| kExprLocalGet, 0, |
| kExprLocalGet, 1, |
| kExprI32DivU |
| ]); |
| builder.addFunction('trap_in_callee', kSig_i_ii) |
| .addBody([ |
| kExprTry, kWasmI32, |
| kExprLocalGet, 0, |
| kExprLocalGet, 1, |
| kExprCallFunction, func_div.index, |
| kExprCatch, |
| kExprDrop, |
| kExprI32Const, 11, |
| kExprEnd |
| ]).exportFunc(); |
| let instance = builder.instantiate(); |
| |
| assertEquals(3, instance.exports.trap_in_callee(7, 2)); |
| assertTraps(kTrapDivByZero, () => instance.exports.trap_in_callee(1, 0)); |
| })(); |
| |
| (function TestTrapViaJSNotCaught() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| let imp = builder.addImport('imp', 'ort', kSig_i_v); |
| builder.addFunction('div', kSig_i_ii) |
| .addBody([ |
| kExprLocalGet, 0, |
| kExprLocalGet, 1, |
| kExprI32DivU |
| ]).exportFunc(); |
| builder.addFunction('call_import', kSig_i_v) |
| .addBody([ |
| kExprTry, kWasmI32, |
| kExprCallFunction, imp, |
| kExprCatch, |
| kExprDrop, |
| kExprI32Const, 11, |
| kExprEnd |
| ]).exportFunc(); |
| let exception = undefined; |
| let instance; |
| function js_import() { |
| try { |
| instance.exports.div(1, 0); |
| } catch (e) { |
| exception = e; |
| } |
| throw exception; |
| } |
| instance = builder.instantiate({imp: {ort: js_import}}); |
| let caught = undefined; |
| try { |
| let res = instance.exports.call_import(); |
| assertUnreachable('call_import should trap, but returned with ' + res); |
| } catch (e) { |
| caught = e; |
| } |
| assertSame(exception, caught); |
| assertInstanceof(exception, WebAssembly.RuntimeError); |
| assertEquals(exception.message, kTrapMsgs[kTrapDivByZero]); |
| })(); |
| |
| (function TestManuallyThrownRuntimeErrorCaught() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| let imp = builder.addImport('imp', 'ort', kSig_i_v); |
| builder.addFunction('call_import', kSig_i_v) |
| .addBody([ |
| kExprTry, kWasmI32, |
| kExprCallFunction, imp, |
| kExprCatch, |
| kExprDrop, |
| kExprI32Const, 11, |
| kExprEnd |
| ]).exportFunc(); |
| function throw_exc() { |
| throw new WebAssembly.RuntimeError('My user text'); |
| } |
| let instance = builder.instantiate({imp: {ort: throw_exc}}); |
| |
| assertEquals(11, instance.exports.call_import()); |
| })(); |
| |
| (function TestExnWithWasmProtoNotCaught() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| let except = builder.addException(kSig_v_v); |
| let imp = builder.addImport('imp', 'ort', kSig_v_v); |
| let throw_fn = builder.addFunction('throw', kSig_v_v) |
| .addBody([kExprThrow, except]) |
| .exportFunc(); |
| builder.addFunction('test', kSig_v_v) |
| .addBody([ |
| // Calling "throw" directly should produce the expected exception. |
| kExprTry, kWasmStmt, |
| kExprCallFunction, throw_fn.index, |
| kExprCatch, |
| kExprBrOnExn, 0, except, |
| kExprRethrow, |
| kExprEnd, |
| // Calling through JS produces a wrapped exceptions which does not match |
| // the br_on_exn. |
| kExprTry, kWasmStmt, |
| kExprCallFunction, imp, |
| kExprCatch, |
| kExprBrOnExn, 0, except, |
| kExprRethrow, |
| kExprEnd |
| ]).exportFunc(); |
| let instance; |
| let wrapped_exn; |
| function js_import() { |
| try { |
| instance.exports.throw(); |
| } catch (e) { |
| wrapped_exn = new Error(); |
| wrapped_exn.__proto__ = e; |
| throw wrapped_exn; |
| } |
| } |
| instance = builder.instantiate({imp: {ort: js_import}}); |
| let caught = undefined; |
| try { |
| instance.exports.test(); |
| } catch (e) { |
| caught = e; |
| } |
| assertTrue(!!caught, 'should have trapped'); |
| assertEquals(caught, wrapped_exn); |
| assertInstanceof(caught.__proto__, WebAssembly.RuntimeError); |
| })(); |
| |
| // Test that we can distinguish which exception was thrown by using a cascaded |
| // sequence of nested try blocks with a single handler in each catch block. |
| (function TestCatchComplex1() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| let except1 = builder.addException(kSig_v_v); |
| let except2 = builder.addException(kSig_v_v); |
| let except3 = builder.addException(kSig_v_v); |
| builder.addFunction("catch_complex", kSig_i_i) |
| .addBody([ |
| kExprBlock, kWasmStmt, |
| kExprBlock, kWasmStmt, |
| kExprTry, kWasmStmt, |
| kExprTry, kWasmStmt, |
| kExprLocalGet, 0, |
| kExprI32Eqz, |
| kExprIf, kWasmStmt, |
| kExprThrow, except1, |
| kExprElse, |
| kExprLocalGet, 0, |
| kExprI32Const, 1, |
| kExprI32Eq, |
| kExprIf, kWasmStmt, |
| kExprThrow, except2, |
| kExprElse, |
| kExprThrow, except3, |
| kExprEnd, |
| kExprEnd, |
| kExprI32Const, 2, |
| kExprReturn, |
| kExprCatch, |
| kExprBrOnExn, 2, except1, |
| kExprRethrow, |
| kExprEnd, |
| kExprCatch, |
| kExprBrOnExn, 2, except2, |
| kExprRethrow, |
| kExprEnd, |
| kExprEnd, |
| kExprI32Const, 3, |
| kExprReturn, |
| kExprEnd, |
| kExprI32Const, 4, |
| ]).exportFunc(); |
| let instance = builder.instantiate(); |
| |
| assertEquals(3, instance.exports.catch_complex(0)); |
| assertEquals(4, instance.exports.catch_complex(1)); |
| assertWasmThrows(instance, except3, [], () => instance.exports.catch_complex(2)); |
| })(); |
| |
| // Test that we can distinguish which exception was thrown by using a single |
| // try block with multiple handlers in the associated catch block. |
| (function TestCatchComplex2() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| let except1 = builder.addException(kSig_v_v); |
| let except2 = builder.addException(kSig_v_v); |
| let except3 = builder.addException(kSig_v_v); |
| builder.addFunction("catch_complex", kSig_i_i) |
| .addBody([ |
| kExprBlock, kWasmStmt, |
| kExprBlock, kWasmStmt, |
| kExprTry, kWasmStmt, |
| kExprLocalGet, 0, |
| kExprI32Eqz, |
| kExprIf, kWasmStmt, |
| kExprThrow, except1, |
| kExprElse, |
| kExprLocalGet, 0, |
| kExprI32Const, 1, |
| kExprI32Eq, |
| kExprIf, kWasmStmt, |
| kExprThrow, except2, |
| kExprElse, |
| kExprThrow, except3, |
| kExprEnd, |
| kExprEnd, |
| kExprI32Const, 2, |
| kExprReturn, |
| kExprCatch, |
| kExprBrOnExn, 1, except1, |
| kExprBrOnExn, 2, except2, |
| kExprRethrow, |
| kExprEnd, |
| kExprEnd, |
| kExprI32Const, 3, |
| kExprReturn, |
| kExprEnd, |
| kExprI32Const, 4, |
| ]).exportFunc(); |
| let instance = builder.instantiate(); |
| |
| assertEquals(3, instance.exports.catch_complex(0)); |
| assertEquals(4, instance.exports.catch_complex(1)); |
| assertWasmThrows(instance, except3, [], () => instance.exports.catch_complex(2)); |
| })(); |
| |
| // Test that br-on-exn also is allowed to consume values already present on the |
| // operand stack, instead of solely values being pushed by the branch itself. |
| (function TestCatchBranchWithValueOnStack() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| let except = builder.addException(kSig_v_v); |
| builder.addFunction("catch_complex", kSig_i_i) |
| .addLocals(kWasmExnRef, 1) |
| .addBody([ |
| kExprBlock, kWasmI32, |
| kExprTry, kWasmStmt, |
| kExprLocalGet, 0, |
| kExprI32Eqz, |
| kExprIf, kWasmStmt, |
| kExprThrow, except, |
| kExprEnd, |
| kExprCatch, |
| kExprLocalSet, 1, |
| kExprI32Const, 23, |
| kExprLocalGet, 1, |
| kExprBrOnExn, 1, except, |
| kExprRethrow, |
| kExprEnd, |
| kExprI32Const, 42, |
| kExprEnd, |
| ]).exportFunc(); |
| let instance = builder.instantiate(); |
| |
| assertEquals(23, instance.exports.catch_complex(0)); |
| assertEquals(42, instance.exports.catch_complex(1)); |
| })(); |
| |
| // Test throwing an exception with multiple values. |
| (function TestThrowMultipleValues() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| let except = builder.addException(kSig_v_ii); |
| builder.addFunction("throw_1_2", kSig_v_v) |
| .addBody([ |
| kExprI32Const, 1, |
| kExprI32Const, 2, |
| kExprThrow, except, |
| ]).exportFunc(); |
| let instance = builder.instantiate(); |
| |
| assertWasmThrows(instance, except, [0, 1, 0, 2], () => instance.exports.throw_1_2()); |
| })(); |
| |
| // Test throwing/catching the i32 parameter value. |
| (function TestThrowCatchParamI() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| let except = builder.addException(kSig_v_i); |
| builder.addFunction("throw_catch_param", kSig_i_i) |
| .addBody([ |
| kExprTry, kWasmI32, |
| kExprLocalGet, 0, |
| kExprThrow, except, |
| kExprI32Const, 2, |
| kExprCatch, |
| kExprBrOnExn, 0, except, |
| kExprRethrow, |
| kExprEnd, |
| ]).exportFunc(); |
| let instance = builder.instantiate(); |
| |
| assertEquals(0, instance.exports.throw_catch_param(0)); |
| assertEquals(1, instance.exports.throw_catch_param(1)); |
| assertEquals(10, instance.exports.throw_catch_param(10)); |
| })(); |
| |
| // Test the encoding of a thrown exception with an integer exception. |
| (function TestThrowParamI() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| let except = builder.addException(kSig_v_i); |
| builder.addFunction("throw_param", kSig_v_i) |
| .addBody([ |
| kExprLocalGet, 0, |
| kExprThrow, except, |
| ]).exportFunc(); |
| let instance = builder.instantiate(); |
| |
| assertWasmThrows(instance, except, [0, 5], () => instance.exports.throw_param(5)); |
| assertWasmThrows(instance, except, [6, 31026], () => instance.exports.throw_param(424242)); |
| })(); |
| |
| // Test throwing/catching the f32 parameter value. |
| (function TestThrowCatchParamF() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| let except = builder.addException(kSig_v_f); |
| builder.addFunction("throw_catch_param", kSig_f_f) |
| .addBody([ |
| kExprTry, kWasmF32, |
| kExprLocalGet, 0, |
| kExprThrow, except, |
| kExprF32Const, 0, 0, 0, 0, |
| kExprCatch, |
| kExprBrOnExn, 0, except, |
| kExprRethrow, |
| kExprEnd, |
| ]).exportFunc(); |
| let instance = builder.instantiate(); |
| |
| assertEquals(5.0, instance.exports.throw_catch_param(5.0)); |
| assertEquals(10.5, instance.exports.throw_catch_param(10.5)); |
| })(); |
| |
| // Test the encoding of a thrown exception with a float value. |
| (function TestThrowParamF() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| let except = builder.addException(kSig_v_f); |
| builder.addFunction("throw_param", kSig_v_f) |
| .addBody([ |
| kExprLocalGet, 0, |
| kExprThrow, except, |
| ]).exportFunc(); |
| let instance = builder.instantiate(); |
| |
| assertWasmThrows(instance, except, [16544, 0], () => instance.exports.throw_param(5.0)); |
| assertWasmThrows(instance, except, [16680, 0], () => instance.exports.throw_param(10.5)); |
| })(); |
| |
| // Test throwing/catching an I64 value |
| (function TestThrowCatchParamL() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| let except = builder.addException(kSig_v_l); |
| builder.addFunction("throw_catch_param", kSig_i_i) |
| .addLocals(kWasmI64, 1) |
| .addBody([ |
| kExprLocalGet, 0, |
| kExprI64UConvertI32, |
| kExprLocalSet, 1, |
| kExprTry, kWasmI64, |
| kExprLocalGet, 1, |
| kExprThrow, except, |
| kExprI64Const, 23, |
| kExprCatch, |
| kExprBrOnExn, 0, except, |
| kExprRethrow, |
| kExprEnd, |
| kExprLocalGet, 1, |
| kExprI64Eq, |
| ]).exportFunc(); |
| let instance = builder.instantiate(); |
| |
| assertEquals(1, instance.exports.throw_catch_param(5)); |
| assertEquals(1, instance.exports.throw_catch_param(0)); |
| assertEquals(1, instance.exports.throw_catch_param(-1)); |
| })(); |
| |
| // Test the encoding of a thrown exception with an I64 value. |
| (function TestThrowParamL() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| let except = builder.addException(kSig_v_l); |
| builder.addFunction("throw_param", kSig_v_ii) |
| .addBody([ |
| kExprLocalGet, 0, |
| kExprI64UConvertI32, |
| kExprI64Const, 32, |
| kExprI64Shl, |
| kExprLocalGet, 1, |
| kExprI64UConvertI32, |
| kExprI64Ior, |
| kExprThrow, except, |
| ]).exportFunc(); |
| let instance = builder.instantiate(); |
| |
| assertWasmThrows(instance, except, [0, 10, 0, 5], () => instance.exports.throw_param(10, 5)); |
| assertWasmThrows(instance, except, [65535, 65535, 0, 13], () => instance.exports.throw_param(-1, 13)); |
| })(); |
| |
| // Test throwing/catching the F64 parameter value |
| (function TestThrowCatchParamD() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| let except = builder.addException(kSig_v_d); |
| builder.addFunction("throw_catch_param", kSig_d_d) |
| .addBody([ |
| kExprTry, kWasmF64, |
| kExprLocalGet, 0, |
| kExprThrow, except, |
| kExprF64Const, 0, 0, 0, 0, 0, 0, 0, 0, |
| kExprCatch, |
| kExprBrOnExn, 0, except, |
| kExprRethrow, |
| kExprEnd, |
| ]).exportFunc(); |
| let instance = builder.instantiate(); |
| |
| assertEquals(5.0, instance.exports.throw_catch_param(5.0)); |
| assertEquals(10.5, instance.exports.throw_catch_param(10.5)); |
| })(); |
| |
| // Test the encoding of a thrown exception with an f64 value. |
| (function TestThrowParamD() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| let except = builder.addException(kSig_v_d); |
| builder.addFunction("throw_param", kSig_v_f) |
| .addBody([ |
| kExprLocalGet, 0, |
| kExprF64ConvertF32, |
| kExprThrow, except, |
| ]).exportFunc(); |
| let instance = builder.instantiate(); |
| |
| assertWasmThrows(instance, except, [16404, 0, 0, 0], () => instance.exports.throw_param(5.0)); |
| assertWasmThrows(instance, except, [16739, 4816, 0, 0], () => instance.exports.throw_param(10000000.5)); |
| })(); |
| |
| // Test the encoding of a computed parameter value. |
| (function TestThrowParamComputed() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| let except = builder.addException(kSig_v_i); |
| builder.addFunction("throw_expr_with_params", kSig_v_ddi) |
| .addBody([ |
| // p2 * (p0 + min(p0, p1))|0 - 20 |
| kExprLocalGet, 2, |
| kExprLocalGet, 0, |
| kExprLocalGet, 0, |
| kExprLocalGet, 1, |
| kExprF64Min, |
| kExprF64Add, |
| kExprI32SConvertF64, |
| kExprI32Mul, |
| kExprI32Const, 20, |
| kExprI32Sub, |
| kExprThrow, except, |
| ]).exportFunc() |
| let instance = builder.instantiate(); |
| |
| assertWasmThrows(instance, except, [65535, 65536-8], () => instance.exports.throw_expr_with_params(1.5, 2.5, 4)); |
| assertWasmThrows(instance, except, [0, 12], () => instance.exports.throw_expr_with_params(5.7, 2.5, 4)); |
| })(); |
| |
| // Now that we know catching works locally, we test catching exceptions that |
| // cross function boundaries and/or raised by JavaScript. |
| (function TestCatchCrossFunctions() { |
| print(arguments.callee.name); |
| let builder = new WasmModuleBuilder(); |
| let except = builder.addException(kSig_v_i); |
| |
| // Helper function for throwing from JS. It is imported by the Wasm module |
| // as throw_i. |
| function throw_value(value) { |
| throw value; |
| } |
| let sig_index = builder.addType(kSig_v_i); |
| let kJSThrowI = builder.addImport("", "throw_i", sig_index); |
| |
| // Helper function that throws a string. Wasm should not catch it. |
| function throw_string() { |
| throw "use wasm"; |
| } |
| sig_index = builder.addType(kSig_v_v); |
| let kJSThrowString = builder.addImport("", "throw_string", sig_index); |
| |
| // Helper function that throws undefined. Wasm should not catch it. |
| function throw_undefined() { |
| throw undefined; |
| } |
| let kJSThrowUndefined = builder.addImport("", "throw_undefined", sig_index); |
| |
| // Helper function that throws an fp. Wasm should not catch it. |
| function throw_fp() { |
| throw 10.5; |
| } |
| let kJSThrowFP = builder.addImport("", "throw_fp", sig_index); |
| |
| // Helper function that throws a large number. Wasm should not catch it. |
| function throw_large() { |
| throw 1e+28; |
| } |
| let kJSThrowLarge = builder.addImport("", "throw_large", sig_index); |
| |
| // Helper function for throwing from WebAssembly. |
| let kWasmThrowFunction = |
| builder.addFunction("throw", kSig_v_i) |
| .addBody([ |
| kExprLocalGet, 0, |
| kExprThrow, except, |
| ]) |
| .index; |
| |
| // Scenario 1: Throw and catch appear on the same function. This should |
| // happen in case of inlining, for example. |
| builder.addFunction("same_scope", kSig_i_i) |
| .addBody([ |
| kExprTry, kWasmI32, |
| kExprLocalGet, 0, |
| kExprI32Const, 0, |
| kExprI32Ne, |
| kExprIf, kWasmStmt, |
| kExprLocalGet, 0, |
| kExprThrow, except, |
| kExprUnreachable, |
| kExprEnd, |
| kExprI32Const, 63, |
| kExprCatch, |
| kExprBrOnExn, 0, except, |
| kExprRethrow, |
| kExprEnd |
| ]) |
| .exportFunc(); |
| |
| builder.addFunction("same_scope_ignore", kSig_i_i) |
| .addBody([ |
| kExprTry, kWasmI32, |
| kExprLocalGet, 0, |
| kExprThrow, except, |
| kExprUnreachable, |
| kExprCatch, |
| kExprBrOnExn, 0, except, |
| kExprRethrow, |
| kExprEnd, |
| ]) |
| .exportFunc(); |
| |
| builder.addFunction("same_scope_multiple", kSig_i_i) |
| .addLocals(kWasmI32, 1).addLocals(kWasmExnRef, 1) |
| // path = 0; |
| // |
| // try { |
| // try { |
| // try { |
| // if (p == 1) |
| // throw 1; |
| // path |= 2 |
| // } catch (v) { |
| // path |= v | 4; |
| // throw path; |
| // } |
| // if (p == 2) |
| // throw path|8; |
| // path |= 16; |
| // } catch (v) { |
| // path |= v | 32; |
| // throw path; |
| // } |
| // if (p == 3) |
| // throw path|64; |
| // path |= 128 |
| // } catch (v) { |
| // path |= v | 256; |
| // } |
| // |
| // return path; |
| // |
| // p == 1 -> path == 293 |
| // p == 2 -> path == 298 |
| // p == 3 -> path == 338 |
| // else -> path == 146 |
| .addBody([ |
| kExprTry, kWasmI32, |
| kExprTry, kWasmI32, |
| kExprTry, kWasmI32, |
| kExprLocalGet, 0, |
| kExprI32Const, 1, |
| kExprI32Eq, |
| kExprIf, kWasmStmt, |
| kExprI32Const, 1, |
| kExprThrow, except, |
| kExprUnreachable, |
| kExprEnd, |
| kExprI32Const, 2, |
| kExprCatch, |
| kExprLocalSet, 2, |
| kExprBlock, kWasmI32, |
| kExprLocalGet, 2, |
| kExprBrOnExn, 0, except, |
| kExprRethrow, |
| kExprEnd, |
| kExprI32Const, 4, |
| kExprI32Ior, |
| kExprThrow, except, |
| kExprUnreachable, |
| kExprEnd, |
| kExprLocalTee, 1, |
| kExprLocalGet, 0, |
| kExprI32Const, 2, |
| kExprI32Eq, |
| kExprIf, kWasmStmt, |
| kExprLocalGet, 1, |
| kExprI32Const, 8, |
| kExprI32Ior, |
| kExprThrow, except, |
| kExprUnreachable, |
| kExprEnd, |
| kExprI32Const, 16, |
| kExprI32Ior, |
| kExprCatch, |
| kExprLocalSet, 2, |
| kExprBlock, kWasmI32, |
| kExprLocalGet, 2, |
| kExprBrOnExn, 0, except, |
| kExprRethrow, |
| kExprEnd, |
| kExprI32Const, 32, |
| kExprI32Ior, |
| kExprThrow, except, |
| kExprUnreachable, |
| kExprEnd, |
| kExprLocalTee, 1, |
| kExprLocalGet, 0, |
| kExprI32Const, 3, |
| kExprI32Eq, |
| kExprIf, kWasmStmt, |
| kExprLocalGet, 1, |
| kExprI32Const, /*64=*/ 192, 0, |
| kExprI32Ior, |
| kExprThrow, except, |
| kExprUnreachable, |
| kExprEnd, |
| kExprI32Const, /*128=*/ 128, 1, |
| kExprI32Ior, |
| kExprCatch, |
| kExprLocalSet, 2, |
| kExprBlock, kWasmI32, |
| kExprLocalGet, 2, |
| kExprBrOnExn, 0, except, |
| kExprRethrow, |
| kExprEnd, |
| kExprI32Const, /*256=*/ 128, 2, |
| kExprI32Ior, |
| kExprEnd, |
| ]) |
| .exportFunc(); |
| |
| // Scenario 2: Catches an exception raised from the direct callee. |
| builder.addFunction("from_direct_callee", kSig_i_i) |
| .addBody([ |
| kExprTry, kWasmI32, |
| kExprLocalGet, 0, |
| kExprCallFunction, kWasmThrowFunction, |
| kExprUnreachable, |
| kExprCatch, |
| kExprBrOnExn, 0, except, |
| kExprRethrow, |
| kExprEnd, |
| ]) |
| .exportFunc(); |
| |
| // Scenario 3: Catches an exception raised from an indirect callee. |
| let sig_v_i = builder.addType(kSig_v_i); |
| builder.appendToTable([kWasmThrowFunction, kWasmThrowFunction]); |
| builder.addFunction("from_indirect_callee", kSig_i_ii) |
| .addBody([ |
| kExprTry, kWasmI32, |
| kExprLocalGet, 0, |
| kExprLocalGet, 1, |
| kExprCallIndirect, sig_v_i, kTableZero, |
| kExprUnreachable, |
| kExprCatch, |
| kExprBrOnExn, 0, except, |
| kExprRethrow, |
| kExprEnd |
| ]) |
| .exportFunc(); |
| |
| // Scenario 4: Does not catch an exception raised in JS, even if primitive |
| // values are being used as exceptions. |
| builder.addFunction("i_from_js", kSig_i_i) |
| .addBody([ |
| kExprTry, kWasmI32, |
| kExprLocalGet, 0, |
| kExprCallFunction, kJSThrowI, |
| kExprUnreachable, |
| kExprCatch, |
| kExprBrOnExn, 0, except, |
| kExprRethrow, |
| kExprEnd, |
| kExprUnreachable, |
| ]) |
| .exportFunc(); |
| |
| builder.addFunction("string_from_js", kSig_v_v) |
| .addBody([ |
| kExprTry, kWasmStmt, |
| kExprCallFunction, kJSThrowString, |
| kExprCatch, |
| kExprBrOnExn, 0, except, |
| kExprRethrow, |
| kExprEnd, |
| kExprUnreachable, |
| ]) |
| .exportFunc(); |
| |
| builder.addFunction("fp_from_js", kSig_v_v) |
| .addBody([ |
| kExprTry, kWasmStmt, |
| kExprCallFunction, kJSThrowFP, |
| kExprCatch, |
| kExprBrOnExn, 0, except, |
| kExprRethrow, |
| kExprEnd, |
| kExprUnreachable, |
| ]) |
| .exportFunc(); |
| |
| builder.addFunction("large_from_js", kSig_v_v) |
| .addBody([ |
| kExprTry, kWasmStmt, |
| kExprCallFunction, kJSThrowLarge, |
| kExprCatch, |
| kExprBrOnExn, 0, except, |
| kExprRethrow, |
| kExprEnd, |
| kExprUnreachable, |
| ]) |
| .exportFunc(); |
| |
| builder.addFunction("undefined_from_js", kSig_v_v) |
| .addBody([ |
| kExprTry, kWasmStmt, |
| kExprCallFunction, kJSThrowUndefined, |
| kExprCatch, |
| kExprBrOnExn, 0, except, |
| kExprRethrow, |
| kExprEnd, |
| kExprUnreachable, |
| ]) |
| .exportFunc(); |
| |
| let instance = builder.instantiate({"": { |
| throw_i: throw_value, |
| throw_string: throw_string, |
| throw_fp: throw_fp, |
| throw_large, throw_large, |
| throw_undefined: throw_undefined |
| }}); |
| |
| assertEquals(63, instance.exports.same_scope(0)); |
| assertEquals(1024, instance.exports.same_scope(1024)); |
| assertEquals(-3, instance.exports.same_scope(-3)); |
| assertEquals(-1, instance.exports.same_scope_ignore(-1)); |
| assertEquals(1, instance.exports.same_scope_ignore(1)); |
| assertEquals(0x7FFFFFFF, instance.exports.same_scope_ignore(0x7FFFFFFF)); |
| assertEquals(1024, instance.exports.same_scope_ignore(1024)); |
| assertEquals(-1, instance.exports.same_scope_ignore(-1)); |
| assertEquals(293, instance.exports.same_scope_multiple(1)); |
| assertEquals(298, instance.exports.same_scope_multiple(2)); |
| assertEquals(338, instance.exports.same_scope_multiple(3)); |
| assertEquals(146, instance.exports.same_scope_multiple(0)); |
| assertEquals(-10024, instance.exports.from_direct_callee(-10024)); |
| assertEquals(3334333, instance.exports.from_direct_callee(3334333)); |
| assertEquals(-1, instance.exports.from_direct_callee(0xFFFFFFFF)); |
| assertEquals(0x7FFFFFFF, instance.exports.from_direct_callee(0x7FFFFFFF)); |
| assertEquals(10, instance.exports.from_indirect_callee(10, 0)); |
| assertEquals(77, instance.exports.from_indirect_callee(77, 1)); |
| |
| assertThrowsEquals(() => instance.exports.i_from_js(10), 10); |
| assertThrowsEquals(() => instance.exports.i_from_js(-10), -10); |
| assertThrowsEquals(instance.exports.string_from_js, "use wasm"); |
| assertThrowsEquals(instance.exports.fp_from_js, 10.5); |
| assertThrowsEquals(instance.exports.large_from_js, 1e+28); |
| assertThrowsEquals(instance.exports.undefined_from_js, undefined); |
| })(); |
