1 description( 2 'This test checks if repeated string concatenation causes an exception (and not a crash). From WebKit Bug <a href="http://bugs.webkit.org/show_bug.cgi?id=11131">Repeated string concatenation results in OOM crash</a>.' 3 ); 4 5 shouldThrow('s = "a"; while (1) { s += s; }', '"Error: Out of memory"'); // Expand at end of string 6 shouldThrow('s = "a"; while (1) { s += ("a" + s); }', '"Error: Out of memory"'); // Expand at beginning of string 7 shouldThrow('s = "a"; while (1) { s = [s, s].join(); }', '"Error: Out of memory"'); // Expand using UString::append. 8 9 debug(''); 10 debug( 11 'We also verify that the the string is stil functional after the out of memory exception is raised. In <a href="rdar://problem/5352887">rdar://problem/5352887</a>, accessing the string after the exception would crash.' 12 ); 13 14 function ensureStringIsUsable(testName, stringName, str) { 15 str[str.length - 1]; 16 try { [str, str].join(str); } catch (o) { } 17 try { "a" + str; } catch (o) { } 18 try { str + "a"; } catch (o) { } 19 debug('PASS: String ' + stringName + ' was functional after ' + testName + ' raised out of memory exception.'); 20 } 21 22 var s = "a"; 23 try { 24 while (1) 25 s += s; // This will expand the string at the end using UString::expandCapacity 26 } catch (o) { 27 ensureStringIsUsable('expandCapacity', 's', s); 28 } 29 30 s = "a"; 31 var t = ""; 32 try { 33 while (1) { 34 t = "a" + s; 35 s += t; // This will expand the string at the beginning using UString::expandPreCapacity 36 } 37 } catch (o) { 38 // Ensure both strings involved are unharmed 39 ensureStringIsUsable('expandPreCapacity', 's', s); 40 ensureStringIsUsable('expandPreCapacity', 't', t); 41 } 42 delete t; 43 44 s = "a"; 45 try { 46 while (1) 47 s = [s, s].join(); // This will expand the string using UString::append. 48 } catch (o) { 49 ensureStringIsUsable('append', 's', s); 50 } 51 52 var successfullyParsed = true; 53
