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// 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-constants.js");
load("test/mjsunit/wasm/wasm-module-builder.js");
load("test/mjsunit/wasm/exceptions-utils.js");
// Test that rethrow expressions work inside catch blocks.
(function TestRethrowInCatch() {
print(arguments.callee.name);
let builder = new WasmModuleBuilder();
let except = builder.addException(kSig_v_v);
builder.addFunction("rethrow0", kSig_v_v)
.addBody([
kExprTry, kWasmStmt,
kExprThrow, except,
kExprCatch,
kExprRethrow,
kExprEnd,
]).exportFunc();
builder.addFunction("rethrow1", kSig_i_i)
.addLocals({except_count: 1})
.addBody([
kExprTry, kWasmI32,
kExprThrow, except,
kExprCatch,
kExprSetLocal, 1,
kExprGetLocal, 0,
kExprI32Eqz,
kExprIf, kWasmStmt,
kExprGetLocal, 1,
kExprRethrow,
kExprEnd,
kExprI32Const, 23,
kExprEnd
]).exportFunc();
let instance = builder.instantiate();
assertWasmThrows(instance, except, [], () => instance.exports.rethrow0());
assertWasmThrows(instance, except, [], () => instance.exports.rethrow1(0));
assertEquals(23, instance.exports.rethrow1(1));
})();
// Test that rethrow expressions work properly even in the presence of multiple
// nested handlers being involved.
(function TestRethrowNested() {
print(arguments.callee.name);
let builder = new WasmModuleBuilder();
let except1 = builder.addException(kSig_v_v);
let except2 = builder.addException(kSig_v_v);
builder.addFunction("rethrow_nested", kSig_i_i)
.addLocals({except_count: 2})
.addBody([
kExprTry, kWasmI32,
kExprThrow, except2,
kExprCatch,
kExprSetLocal, 2,
kExprTry, kWasmI32,
kExprThrow, except1,
kExprCatch,
kExprSetLocal, 1,
kExprGetLocal, 0,
kExprI32Const, 0,
kExprI32Eq,
kExprIf, kWasmStmt,
kExprGetLocal, 1,
kExprRethrow,
kExprEnd,
kExprGetLocal, 0,
kExprI32Const, 1,
kExprI32Eq,
kExprIf, kWasmStmt,
kExprGetLocal, 2,
kExprRethrow,
kExprEnd,
kExprI32Const, 23,
kExprEnd,
kExprEnd,
]).exportFunc();
let instance = builder.instantiate();
assertWasmThrows(instance, except1, [], () => instance.exports.rethrow_nested(0));
assertWasmThrows(instance, except2, [], () => instance.exports.rethrow_nested(1));
assertEquals(23, instance.exports.rethrow_nested(2));
})();
// Test that an exception being rethrow can be caught by another local catch
// block in the same function without ever unwinding the activation.
(function TestRethrowRecatch() {
print(arguments.callee.name);
let builder = new WasmModuleBuilder();
let except = builder.addException(kSig_v_v);
builder.addFunction("rethrow_recatch", kSig_i_i)
.addLocals({except_count: 1})
.addBody([
kExprTry, kWasmI32,
kExprThrow, except,
kExprCatch,
kExprSetLocal, 1,
kExprTry, kWasmI32,
kExprGetLocal, 0,
kExprI32Eqz,
kExprIf, kWasmStmt,
kExprGetLocal, 1,
kExprRethrow,
kExprEnd,
kExprI32Const, 42,
kExprCatch,
kExprDrop,
kExprI32Const, 23,
kExprEnd,
kExprEnd,
]).exportFunc();
let instance = builder.instantiate();
assertEquals(23, instance.exports.rethrow_recatch(0));
assertEquals(42, instance.exports.rethrow_recatch(1));
})();
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