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LibJS: Lazily collect stack trace information

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The previous implementation was calling `backtrace()` for every
function call, which is quite slow.

Instead, this implementation provides VM::stack_trace() which unwinds
the native stack, maps it through NativeExecutable::get_source_range
and combines it with source ranges from interpreted call frames.
This commit is contained in:
Simon Wanner 2023-11-01 00:39:28 +01:00 • committed by Andreas Kling
parent 77dc7c4d36
commit 68f4d21de2
11 changed files with 96 additions and 46 deletions
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2
Userland/Libraries/LibJS/Tests/builtins/Error/Error.prototype.stack.js
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@ -5,7 +5,7 @@ const stackSetter = stackDescriptor.set;
describe("getter - normal behavior", () => {
test("basic functionality", () => {
const stackFrames = [
/^ at .*Error \(.*\/Error\.prototype\.stack\.js:\d+:\d+\)$/,
/^ at .*Error$/,
/^ at .+\/Error\/Error\.prototype\.stack\.js:\d+:\d+$/,
/^ at test \(.+\/test-common.js:\d+:\d+\)$/,
/^ at .+\/Error\/Error\.prototype\.stack\.js:6:9$/,