We often want to know the source of a call grammatically but are not interested in profiling. It would be nice to have something like struct frame { // If we have an API to resolve the symbol in process, // otherwise you need to symbolicate it using addr2line // or a symbol server. char* symbol_name; char* library_name; void* library_offset; }; frame[] GeckoGetBacktrace(); which would return something like: main() process_event() js_foo() js_draw_canvas() or if you don't have an API to symbolicate: 0x<ADDRESS> 0x<ADDRESS> js_foo() js_draw_canvas()

Yeah, within SpiderMonkey itself we have about a dozen potential applications for a "dead stack" data structure: just a record of where execution was, not live frames or anything like that. If you can refactor this stack unwinding facility, that's what it should produce. We can make sure it can include C++ frames, too.