{"json_modified": "2016-03-28T08:08:43.805757", "uuid": "93e9d74e-bf6a-4aab-93bb-2c45ee556fe3", "title": "JS_GetFunctionCallback", "url": "/en-US/docs/Mozilla/Projects/SpiderMonkey/JSAPI_reference/JS_GetFunctionCallback", "tags": ["Obsolete", "SpiderMonkey", "JSAPI Reference"], "translations": [], "modified": "2014-12-27T21:42:12", "label": "JS_GetFunctionCallback", "localization_tags": [], "locale": "en-US", "id": 9116, "last_edit": "2014-12-27T21:42:06", "summary": "Returns the callback currently configured to be called when JavaScript functions are invoked or exited, as established by a prior call to <a href=\"/en-US/docs/Mozilla/Projects/SpiderMonkey/JSAPI_reference/JS_SetFunctionCallback\" title=\"Sets a callback to be run whenever a JavaScript function is invoked or exited. This lets you trace the execution of code, and is particularly useful for JavaScript tracers and profilers since it works across all run modes (interpreter, method JIT, trace JIT). Using this function may have a significant performance impact. See Function tracing for an example.\"><code>JS_SetFunctionCallback</code></a>.", "sections": [{"id": "Quick_Links", "title": null}, {"id": "Syntax", "title": "Syntax"}, {"id": "Description", "title": "Description"}, {"id": "See_Also", "title": "See Also"}], "slug": "Mozilla/Projects/SpiderMonkey/JSAPI_reference/JS_GetFunctionCallback", "review_tags": []}