9ee7e4ec98
This reimplements functionality that was present before the decoder refactoring. It's implemented a bit differently though by generating the code for re-throwing an uncaught exception earlier (when generating code for the catch). R=titzer@chromium.org, kschimpf@chromium.org Bug: v8:6600 Change-Id: Ie2f11837851c0602ab31506fa63475fc2d0b5047 Reviewed-on: https://chromium-review.googlesource.com/641550 Commit-Queue: Brad Nelson <bradnelson@chromium.org> Reviewed-by: Brad Nelson <bradnelson@chromium.org> Cr-Commit-Position: refs/heads/master@{#47687}
452 lines
14 KiB
JavaScript
452 lines
14 KiB
JavaScript
// Copyright 2015 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
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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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// The following method doesn't attempt to catch an raised exception.
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var test_throw = (function () {
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var builder = new WasmModuleBuilder();
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builder.addException(kSig_v_v);
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builder.addFunction("throw_if_param_not_zero", kSig_i_i)
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.addBody([
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kExprGetLocal, 0,
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kExprI32Const, 0,
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kExprI32Ne,
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kExprIf, kWasmStmt,
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kExprThrow, 0,
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kExprEnd,
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kExprI32Const, 1
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]).exportFunc();
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return builder.instantiate();
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})();
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// Check the test_throw exists.
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assertFalse(test_throw === undefined);
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assertFalse(test_throw === null);
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assertFalse(test_throw === 0);
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assertEquals("object", typeof test_throw.exports);
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assertEquals("function", typeof test_throw.exports.throw_if_param_not_zero);
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// Test expected behavior of throws
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assertEquals(1, test_throw.exports.throw_if_param_not_zero(0));
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assertWasmThrows([], function() { test_throw.exports.throw_if_param_not_zero(10) });
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assertWasmThrows([], function() { test_throw.exports.throw_if_param_not_zero(-1) });
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// Now that we know throwing works, we test catching the exceptions we raise.
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var test_catch = (function () {
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var builder = new WasmModuleBuilder();
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builder.addException(kSig_v_v);
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builder.addFunction("simple_throw_catch_to_0_1", kSig_i_i)
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.addBody([
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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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kExprThrow, 0,
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kExprEnd,
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kExprI32Const, 1,
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kExprCatch, 0,
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kExprI32Const, 0,
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kExprEnd
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]).exportFunc();
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return builder.instantiate();
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})();
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// Check the test_catch exists.
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assertFalse(test_catch === undefined);
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assertFalse(test_catch === null);
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assertFalse(test_catch === 0);
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assertEquals("object", typeof test_catch.exports);
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assertEquals("function", typeof test_catch.exports.simple_throw_catch_to_0_1);
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// Test expected behavior of simple catch.
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assertEquals(0, test_catch.exports.simple_throw_catch_to_0_1(0));
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assertEquals(1, test_catch.exports.simple_throw_catch_to_0_1(1));
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/* TODO(kschimpf) Convert these tests to work for the proposed exceptions.
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// The following methods do not attempt to catch the exception they raise.
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var test_throw = (function () {
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var builder = new WasmModuleBuilder();
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builder.addFunction("throw_param_if_not_zero", kSig_i_i)
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.addBody([
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kExprGetLocal, 0,
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kExprI32Const, 0,
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kExprI32Ne,
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kExprIf, kWasmStmt,
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kExprGetLocal, 0,
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kExprThrow,
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kExprEnd,
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kExprI32Const, 1
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])
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.exportFunc()
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builder.addFunction("throw_20", kSig_v_v)
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.addBody([
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kExprI32Const, 20,
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kExprThrow,
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])
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.exportFunc()
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builder.addFunction("throw_expr_with_params", kSig_v_ddi)
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.addBody([
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// p2 * (p0 + min(p0, p1))|0 - 20
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kExprGetLocal, 2,
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kExprGetLocal, 0,
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kExprGetLocal, 0,
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kExprGetLocal, 1,
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kExprF64Min,
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kExprF64Add,
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kExprI32SConvertF64,
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kExprI32Mul,
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kExprI32Const, 20,
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kExprI32Sub,
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kExprThrow,
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])
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.exportFunc()
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return builder.instantiate();
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})();
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// Check the test_throw exists.
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assertFalse(test_throw === undefined);
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assertFalse(test_throw === null);
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assertFalse(test_throw === 0);
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assertEquals("object", typeof test_throw.exports);
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assertEquals("function", typeof test_throw.exports.throw_param_if_not_zero);
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assertEquals("function", typeof test_throw.exports.throw_20);
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assertEquals("function", typeof test_throw.exports.throw_expr_with_params);
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assertEquals(1, test_throw.exports.throw_param_if_not_zero(0));
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assertWasmThrows(10, function() { test_throw.exports.throw_param_if_not_zero(10) });
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assertWasmThrows(-1, function() { test_throw.exports.throw_param_if_not_zero(-1) });
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assertWasmThrows(20, test_throw.exports.throw_20);
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assertWasmThrows(
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-8, function() { test_throw.exports.throw_expr_with_params(1.5, 2.5, 4); });
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assertWasmThrows(
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12, function() { test_throw.exports.throw_expr_with_params(5.7, 2.5, 4); });
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// Now that we know throwing works, we test catching the exceptions we raise.
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var test_catch = (function () {
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var builder = new WasmModuleBuilder();
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// Helper function for throwing from js. It is imported by the Wasm module
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// as throw_i.
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function throw_value(value) {
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throw value;
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}
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var sig_index = builder.addType(kSig_v_i);
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var kJSThrowI = builder.addImport("", "throw_i", sig_index);
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// Helper function that throws a string. Wasm should not catch it.
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function throw_string() {
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throw "use wasm;";
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}
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sig_index = builder.addType(kSig_v_v);
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var kJSThrowString = builder.addImport("", "throw_string", sig_index);
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// Helper function that throws undefined. Wasm should not catch it.
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function throw_undefined() {
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throw undefined;
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}
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var kJSThrowUndefined = builder.addImport("", "throw_undefined", sig_index);
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// Helper function that throws an fp. Wasm should not catch it.
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function throw_fp() {
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throw 10.5;
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}
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var kJSThrowFP = builder.addImport("", "throw_fp", sig_index);
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// Helper function that throws a large number. Wasm should not catch it.
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function throw_large() {
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throw 1e+28;
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}
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var kJSThrowLarge = builder.addImport("", "throw_large", sig_index);
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// Helper function for throwing from WebAssembly.
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var kWasmThrowFunction =
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builder.addFunction("throw", kSig_v_i)
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.addBody([
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kExprGetLocal, 0,
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kExprThrow
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])
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.index;
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// Scenario 1: Throw and catch appear on the same function. This should
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// happen in case of inlining, for example.
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builder.addFunction("same_scope", kSig_i_i)
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.addBody([
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kExprTry, kWasmI32,
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kExprGetLocal, 0,
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kExprI32Const, 0,
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kExprI32Ne,
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kExprIf, kWasmStmt,
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kExprGetLocal, 0,
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kExprThrow,
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kExprUnreachable,
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kExprEnd,
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kExprI32Const, 63,
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kExprCatch, 1,
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kExprGetLocal, 1,
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kExprEnd
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])
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.addLocals({i32_count: 1})
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.exportFunc()
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.index;
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builder.addFunction("same_scope_ignore", kSig_i_i)
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.addBody([
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kExprTry, kWasmI32,
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kExprGetLocal, 0,
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kExprThrow,
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kExprUnreachable,
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kExprCatch, 1,
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kExprGetLocal, 0,
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kExprEnd,
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])
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.addLocals({i32_count: 1})
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.exportFunc();
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builder.addFunction("same_scope_multiple", kSig_i_i)
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// path = 0;
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//
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// try {
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// try {
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// try {
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// if (p == 1)
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// throw 1;
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// path |= 2
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// } catch (v) {
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// path |= v | 4;
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// throw path;
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// }
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// if (p == 2)
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// throw path|8;
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// path |= 16;
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// } catch (v) {
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// path |= v | 32;
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// throw path;
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// }
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// if (p == 3)
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// throw path|64;
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// path |= 128
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// } catch (v) {
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// path |= v | 256;
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// }
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//
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// return path;
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//
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// p == 1 -> path == 293
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// p == 2 -> path == 298
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// p == 3 -> path == 338
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// else -> path == 146
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.addBody([
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kExprTry, kWasmI32,
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kExprTry, kWasmI32,
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kExprTry, kWasmI32,
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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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kExprI32Const, 1,
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kExprThrow,
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kExprUnreachable,
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kExprEnd,
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kExprI32Const, 2,
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kExprCatch, 1,
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kExprGetLocal, 1,
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kExprI32Const, 4,
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kExprI32Ior,
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kExprThrow,
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kExprUnreachable,
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kExprEnd,
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kExprTeeLocal, 2,
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kExprGetLocal, 0,
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kExprI32Const, 2,
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kExprI32Eq,
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kExprIf, kWasmStmt,
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kExprGetLocal, 2,
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kExprI32Const, 8,
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kExprI32Ior,
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kExprThrow,
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kExprUnreachable,
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kExprEnd,
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kExprI32Const, 16,
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kExprI32Ior,
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kExprCatch, 1,
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kExprGetLocal, 1,
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kExprI32Const, 32,
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kExprI32Ior,
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kExprThrow,
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kExprUnreachable,
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kExprEnd,
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kExprTeeLocal, 2,
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kExprGetLocal, 0,
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kExprI32Const, 3,
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kExprI32Eq,
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kExprIf, kWasmStmt,
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kExprGetLocal, 2,
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kExprI32Const, / *64=* / 192, 0,
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kExprI32Ior,
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kExprThrow,
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kExprUnreachable,
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kExprEnd,
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kExprI32Const, / *128=* / 128, 1,
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kExprI32Ior,
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kExprCatch, 1,
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kExprGetLocal, 1,
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kExprI32Const, / *256=* / 128, 2,
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kExprI32Ior,
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kExprEnd,
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])
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.addLocals({i32_count: 2})
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.exportFunc();
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// Scenario 2: Catches an exception raised from the direct callee.
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var kFromDirectCallee =
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builder.addFunction("from_direct_callee", kSig_i_i)
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.addBody([
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kExprTry, kWasmI32,
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kExprGetLocal, 0,
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kExprCallFunction, kWasmThrowFunction,
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kExprI32Const, / *-1=* / 127,
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kExprCatch, 1,
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kExprGetLocal, 1,
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kExprEnd
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])
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.addLocals({i32_count: 1})
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.exportFunc()
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.index;
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// Scenario 3: Catches an exception raised from an indirect callee.
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var kFromIndirectCalleeHelper = kFromDirectCallee + 1;
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builder.addFunction("from_indirect_callee_helper", kSig_v_ii)
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.addBody([
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kExprGetLocal, 0,
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kExprI32Const, 0,
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kExprI32GtS,
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kExprIf, kWasmStmt,
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kExprGetLocal, 0,
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kExprI32Const, 1,
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kExprI32Sub,
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kExprGetLocal, 1,
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kExprI32Const, 1,
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kExprI32Sub,
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kExprCallFunction, kFromIndirectCalleeHelper,
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kExprEnd,
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kExprGetLocal, 1,
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kExprCallFunction, kWasmThrowFunction,
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]);
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builder.addFunction("from_indirect_callee", kSig_i_i)
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.addBody([
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kExprTry, kWasmI32,
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kExprGetLocal, 0,
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kExprI32Const, 0,
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kExprCallFunction, kFromIndirectCalleeHelper,
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kExprI32Const, / *-1=* / 127,
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kExprCatch, 1,
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kExprGetLocal, 1,
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kExprEnd
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])
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.addLocals({i32_count: 1})
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.exportFunc();
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// Scenario 4: Catches an exception raised in JS.
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builder.addFunction("from_js", kSig_i_i)
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.addBody([
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kExprTry, kWasmI32,
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kExprGetLocal, 0,
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kExprCallFunction, kJSThrowI,
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kExprI32Const, / *-1=* / 127,
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kExprCatch, 1,
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kExprGetLocal, 1,
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kExprEnd,
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])
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.addLocals({i32_count: 1})
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.exportFunc();
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// Scenario 5: Does not catch an exception raised in JS if it is not a
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// number.
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builder.addFunction("string_from_js", kSig_v_v)
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.addBody([
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kExprCallFunction, kJSThrowString
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])
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.exportFunc();
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builder.addFunction("fp_from_js", kSig_v_v)
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.addBody([
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kExprCallFunction, kJSThrowFP
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])
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.exportFunc();
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builder.addFunction("large_from_js", kSig_v_v)
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.addBody([
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kExprCallFunction, kJSThrowLarge
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])
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.exportFunc();
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builder.addFunction("undefined_from_js", kSig_v_v)
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.addBody([
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kExprCallFunction, kJSThrowUndefined
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])
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.exportFunc();
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return builder.instantiate({"": {
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throw_i: throw_value,
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throw_string: throw_string,
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throw_fp: throw_fp,
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throw_large, throw_large,
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throw_undefined: throw_undefined
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}});
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})();
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// Check the test_catch exists.
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assertFalse(test_catch === undefined);
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assertFalse(test_catch === null);
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assertFalse(test_catch === 0);
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assertEquals("object", typeof test_catch.exports);
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assertEquals("function", typeof test_catch.exports.same_scope);
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assertEquals("function", typeof test_catch.exports.same_scope_ignore);
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assertEquals("function", typeof test_catch.exports.same_scope_multiple);
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assertEquals("function", typeof test_catch.exports.from_direct_callee);
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assertEquals("function", typeof test_catch.exports.from_indirect_callee);
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assertEquals("function", typeof test_catch.exports.from_js);
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assertEquals("function", typeof test_catch.exports.string_from_js);
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assertEquals(63, test_catch.exports.same_scope(0));
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assertEquals(1024, test_catch.exports.same_scope(1024));
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assertEquals(-3, test_catch.exports.same_scope(-3));
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assertEquals(-1, test_catch.exports.same_scope_ignore(-1));
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assertEquals(1, test_catch.exports.same_scope_ignore(1));
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assertEquals(0x7FFFFFFF, test_catch.exports.same_scope_ignore(0x7FFFFFFF));
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assertEquals(1024, test_catch.exports.same_scope_ignore(1024));
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assertEquals(-1, test_catch.exports.same_scope_ignore(-1));
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assertEquals(293, test_catch.exports.same_scope_multiple(1));
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assertEquals(298, test_catch.exports.same_scope_multiple(2));
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assertEquals(338, test_catch.exports.same_scope_multiple(3));
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assertEquals(146, test_catch.exports.same_scope_multiple(0));
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assertEquals(-10024, test_catch.exports.from_direct_callee(-10024));
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assertEquals(3334333, test_catch.exports.from_direct_callee(3334333));
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assertEquals(-1, test_catch.exports.from_direct_callee(0xFFFFFFFF));
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assertEquals(0x7FFFFFFF, test_catch.exports.from_direct_callee(0x7FFFFFFF));
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assertEquals(-10, test_catch.exports.from_indirect_callee(10));
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assertEquals(-77, test_catch.exports.from_indirect_callee(77));
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assertEquals(10, test_catch.exports.from_js(10));
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assertEquals(-10, test_catch.exports.from_js(-10));
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assertThrowsEquals(test_catch.exports.string_from_js, "use wasm;");
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assertThrowsEquals(test_catch.exports.large_from_js, 1e+28);
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assertThrowsEquals(test_catch.exports.undefined_from_js, undefined);
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*/
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