| Summary: | LLInt should update stackTraceLimit in GlobalObject | ||
|---|---|---|---|
| Product: | WebKit | Reporter: | EntryHi <entryhii> |
| Component: | JavaScriptCore | Assignee: | Nobody <webkit-unassigned> |
| Status: | NEW --- | ||
| Severity: | Normal | CC: | mark.lam, msaboff, webkit-bug-importer, ysuzuki |
| Priority: | P2 | Keywords: | InRadar |
| Version: | WebKit Local Build | ||
| Hardware: | PC | ||
| OS: | Linux | ||
function f0(a1) { try{ Error.stackTraceLimit = a1; // put_by_id throw Error() } catch(e) { return e.stack; } } for (let v14 = 0; v14 < 2; v14++) { print(f0(v14)); } With the above script as input to JSC, run JSC with the following parameters: ./jsc test.js --useConcurrentJIT=0 JSC print two "undefined". The corrent result should be an "undefined" and a stackTrace. The problem may be in LLInt. The number of loops is 2. Therefore, LLInt will execute `put_by_id` twice, the first execution is slow_path, and `stackTraceLimit` in `globalObject` will be updated, but the slow_path is not used for the second time, and `stackTraceLimit` in `globalObject` is not updated. `getStackTrace` in Error.cpp will use `stackTraceLimit`, but stackTraceLimit is always 0, so two "undefined" are printed. Safari console also prints wrong result, V8 prints correct result.