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LibJS+Embedders: Unify stack trace format for uncaught errors

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Previously these handlers duplicated code and used formats that
were different from the one Error.prototype.stack uses.

Now they use the same Error::stack_string function, which accepts
a new parameter for compacting stack traces with repeating frames.
This commit is contained in:
Simon Wanner 2023-10-31 21:55:17 +01:00 • committed by Andreas Kling
parent 2fb0cede9a
commit 93908fcbcb
6 changed files with 52 additions and 78 deletions
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26
Meta/Lagom/Wasm/js_repl.cpp
View file

@ -165,31 +165,7 @@ static ErrorOr<bool> parse_and_run(JS::Realm& realm, StringView source, StringVi
if (!thrown_value.is_object() || !is<JS::Error>(thrown_value.as_object()))
return;
auto& traceback = static_cast<JS::Error const&>(thrown_value.as_object()).traceback();
if (traceback.size() > 1) {
unsigned repetitions = 0;
for (size_t i = 0; i < traceback.size(); ++i) {
auto& traceback_frame = traceback[i];
if (i + 1 < traceback.size()) {
auto& next_traceback_frame = traceback[i + 1];
if (next_traceback_frame.function_name == traceback_frame.function_name) {
repetitions++;
continue;
}
}
if (repetitions > 4) {
// If more than 5 (1 + >4) consecutive function calls with the same name, print
// the name only once and show the number of repetitions instead. This prevents
// printing ridiculously large call stacks of recursive functions.
displayln(" -> {}", traceback_frame.function_name);
displayln(" {} more calls", repetitions);
} else {
for (size_t j = 0; j < repetitions + 1; ++j)
displayln(" -> {}", traceback_frame.function_name);
}
repetitions = 0;
}
}
displayln("{}", static_cast<JS::Error const&>(thrown_value.as_object()).stack_string(JS::CompactTraceback::Yes));
};
if (!result.is_error())