aaee69584f
This switches the experimental exception handling implementation to the new proposal where 'catch' blocks behave in a catch-all fashion and a new 'br_on_exn' operation is used to check for a certain exception type and extract the exception values on a match. R=clemensh@chromium.org TEST=unittests/FunctionBodyDecoderTest,mjsunit/wasm/exceptions BUG=v8:8091 Change-Id: Ib12ba28b3aa2a7d831312a83abcb00bf56d0adc3 Reviewed-on: https://chromium-review.googlesource.com/c/1409431 Commit-Queue: Michael Starzinger <mstarzinger@chromium.org> Reviewed-by: Clemens Hammacher <clemensh@chromium.org> Cr-Commit-Position: refs/heads/master@{#58832}
122 lines
3.8 KiB
JavaScript
122 lines
3.8 KiB
JavaScript
// Copyright 2018 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --expose-wasm --experimental-wasm-eh --allow-natives-syntax
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load("test/mjsunit/wasm/wasm-constants.js");
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load("test/mjsunit/wasm/wasm-module-builder.js");
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load("test/mjsunit/wasm/exceptions-utils.js");
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// Test that rethrow expressions work inside catch blocks.
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(function TestRethrowInCatch() {
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print(arguments.callee.name);
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let builder = new WasmModuleBuilder();
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let except = builder.addException(kSig_v_v);
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builder.addFunction("rethrow0", kSig_v_v)
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.addBody([
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kExprTry, kWasmStmt,
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kExprThrow, except,
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kExprCatch,
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kExprRethrow,
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kExprEnd,
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]).exportFunc();
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builder.addFunction("rethrow1", kSig_i_i)
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.addLocals({except_count: 1})
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.addBody([
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kExprTry, kWasmI32,
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kExprThrow, except,
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kExprCatch,
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kExprSetLocal, 1,
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kExprGetLocal, 0,
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kExprI32Eqz,
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kExprIf, kWasmStmt,
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kExprGetLocal, 1,
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kExprRethrow,
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kExprEnd,
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kExprI32Const, 23,
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kExprEnd
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]).exportFunc();
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let instance = builder.instantiate();
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assertWasmThrows(instance, except, [], () => instance.exports.rethrow0());
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assertWasmThrows(instance, except, [], () => instance.exports.rethrow1(0));
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assertEquals(23, instance.exports.rethrow1(1));
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})();
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// Test that rethrow expressions work properly even in the presence of multiple
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// nested handlers being involved.
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(function TestRethrowNested() {
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print(arguments.callee.name);
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let builder = new WasmModuleBuilder();
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let except1 = builder.addException(kSig_v_v);
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let except2 = builder.addException(kSig_v_v);
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builder.addFunction("rethrow_nested", kSig_i_i)
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.addLocals({except_count: 2})
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.addBody([
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kExprTry, kWasmI32,
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kExprThrow, except2,
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kExprCatch,
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kExprSetLocal, 2,
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kExprTry, kWasmI32,
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kExprThrow, except1,
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kExprCatch,
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kExprSetLocal, 1,
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kExprGetLocal, 0,
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kExprI32Const, 0,
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kExprI32Eq,
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kExprIf, kWasmStmt,
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kExprGetLocal, 1,
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kExprRethrow,
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kExprEnd,
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kExprGetLocal, 0,
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kExprI32Const, 1,
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kExprI32Eq,
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kExprIf, kWasmStmt,
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kExprGetLocal, 2,
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kExprRethrow,
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kExprEnd,
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kExprI32Const, 23,
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kExprEnd,
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kExprEnd,
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]).exportFunc();
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let instance = builder.instantiate();
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assertWasmThrows(instance, except1, [], () => instance.exports.rethrow_nested(0));
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assertWasmThrows(instance, except2, [], () => instance.exports.rethrow_nested(1));
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assertEquals(23, instance.exports.rethrow_nested(2));
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})();
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// Test that an exception being rethrow can be caught by another local catch
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// block in the same function without ever unwinding the activation.
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(function TestRethrowRecatch() {
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print(arguments.callee.name);
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let builder = new WasmModuleBuilder();
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let except = builder.addException(kSig_v_v);
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builder.addFunction("rethrow_recatch", kSig_i_i)
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.addLocals({except_count: 1})
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.addBody([
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kExprTry, kWasmI32,
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kExprThrow, except,
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kExprCatch,
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kExprSetLocal, 1,
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kExprTry, kWasmI32,
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kExprGetLocal, 0,
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kExprI32Eqz,
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kExprIf, kWasmStmt,
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kExprGetLocal, 1,
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kExprRethrow,
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kExprEnd,
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kExprI32Const, 42,
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kExprCatch,
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kExprDrop,
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kExprI32Const, 23,
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kExprEnd,
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kExprEnd,
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]).exportFunc();
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let instance = builder.instantiate();
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assertEquals(23, instance.exports.rethrow_recatch(0));
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assertEquals(42, instance.exports.rethrow_recatch(1));
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})();
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