RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-26 20:17:44 +00:00
Code Issues Activity Actions

LibJS: Lazily collect stack trace information

Browse source 
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
Download patch file Download diff file Expand all files Collapse all files

7
Userland/Libraries/LibJS/Runtime/ExecutionContext.h
View file

@ -51,9 +51,16 @@ public:
MarkedVector<Value> local_variables;
bool is_strict_mode { false };
RefPtr<Bytecode::Executable> executable;
// https://html.spec.whatwg.org/multipage/webappapis.html#skip-when-determining-incumbent-counter
// FIXME: Move this out of LibJS (e.g. by using the CustomData concept), as it's used exclusively by LibWeb.
size_t skip_when_determining_incumbent_counter { 0 };
};
struct StackTraceElement {
ExecutionContext* execution_context;
Optional<UnrealizedSourceRange> source_range;
};
}