| <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"> |
| <html> |
| <head> |
| <script> |
| |
| function runArrayOOMTest() { |
| document.write("<p>Starting test...</p>"); |
| |
| // The index 'target' is the location in the array we expect to fault on access, should the size calculation of the realloc of the vector be allowed |
| // to overflow. The vector needs to be ((target + 1) * sizeof(JSValue*)) bytes long to hold 'target', or approximately 2/3 UINT32_MAX. Upon growing |
| // the array an additional 50% capacity will be allocated, plus the storage object header, taking the size of the allocation over UINT32_MAX. |
| var target = Math.floor(0xFFFFFFFF / 6); |
| // In order to force arr[target] to be stored in the vector, rather than the sparse map, we need ensure the vector is sufficiently densely populated. |
| var populate = Math.floor(target / 8 + 1); |
| |
| try { |
| var arr = new Array(); |
| for (i=0; i < populate; ++i) |
| arr[i] = 0; |
| arr[target] = 0; |
| } catch(e) { |
| var expect_name = "Error"; |
| var expect_message = "Out of memory"; |
| if ((e.name == expect_name) && (e.message == expect_message)) |
| document.write("<p>SUCCESS</p>"); |
| else |
| document.write("<p>FAIL - Expected \"" + expect_name + "/" + expect_message + "\", got \"" + e.name + "/" + e.message + "\".</p>"); |
| |
| return; |
| } |
| |
| document.write("<p>FAIL - Expected exception.</p>"); |
| } |
| |
| </script> |
| </head> |
| <body> |
| <p>This test checks that Array objects fail gracefully (throw exception) when array length grows large.</p> |
| <p>This test may run for over 20 seconds on a fast machine, and will consume hundereds of MB of memory.</p> |
| <input type="button" onclick="runArrayOOMTest()" value="Start"> |
| </body> |
| </html> |
