60 lines
1.5 KiB
JavaScript
60 lines
1.5 KiB
JavaScript
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// Copyright 2017 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: --allow-natives-syntax
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// This tests checks some possible wrong exception handling due to,
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// for instance, the OSR loop peeling. If exception handlers are not updated
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// correctly, when we run the second iteration of the outermost loop, which
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// is the OSR optimised version, the try-catch will fail... which should not
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// fail on a correct code.
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function SingleLoop() {
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for (var a = 0; a < 2; a++) {
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try { throw 'The exception should have been caught.'; }
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catch(e) {}
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for (var b = 0; b < 1; b++) {
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%OptimizeOsr();
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}
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}
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}
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// These function could also fail if the exception handlers are not updated at
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// the right time: a JSStackCheck gets created for the print, just after the
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// bytecode for the while LoopHeader. If the OSR phase did not exit properly
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// the exception before visiting the bytecode for the print, it will fail
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// because some IfSuccess gets created for nothing (the IfException will
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// become dead code and removed).
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function EmptyBody() {
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try {; } catch(e) {; }
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var a = 0;
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while (1) {
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%OptimizeOsr();
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print("foo");
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if (a == 1) break;
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a++;
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}
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}
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function NestedLoops() {
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for (var a = 0; a < 2; a++) {
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try {; } catch(e) {; }
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%OptimizeOsr();
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var b = 0;
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while (1) {
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print("bar");
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if (b == 1) break;
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b++;
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}
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}
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}
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SingleLoop();
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EmptyBody();
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NestedLoops();
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