Hello everyone!
I'm writing a command to llnode to print all Handles and Requests on the queue of a core dump (similar to what node::GetActiveHandles and node::GetActiveRequests do). While I was working I noticed that, although there's plenty of debugging symbols to help navigate V8 structures (v8dbg_ symbols, thanks to the postmortem-metadata action on V8 build), there are no symbols to describe Node internal structures.
Using as example the command I'm implementing, I need to get the current Environment, navigate to the corresponding queue (let's say, handle_wrap_queue_), and then iterate over this queue (which was created with ListHead) to be able to get the HandleWrap objects. All of this can be done easily on a node debug build, but it's not possible to do on a common build.
I thought about implementing something similar to V8 postmortem-metadata: a script that creates a .cc file with all wanted symbols prefixed with something like nodedbg_. Would that be acceptable? I could probably publish a draft patch at the end of this week. I think this would be useful for other debugging tools, not just llnode.
I'm opened to suggestions.
In the meantime, thank you so much for your attention and participation.
Hello everyone!
I'm writing a command to llnode to print all Handles and Requests on the queue of a core dump (similar to what node::GetActiveHandles and node::GetActiveRequests do). While I was working I noticed that, although there's plenty of debugging symbols to help navigate V8 structures (
v8dbg_symbols, thanks to thepostmortem-metadataaction on V8 build), there are no symbols to describe Node internal structures.Using as example the command I'm implementing, I need to get the current
Environment, navigate to the corresponding queue (let's say,handle_wrap_queue_), and then iterate over this queue (which was created withListHead) to be able to get the HandleWrap objects. All of this can be done easily on a node debug build, but it's not possible to do on a common build.I thought about implementing something similar to V8 postmortem-metadata: a script that creates a
.ccfile with all wanted symbols prefixed with something likenodedbg_. Would that be acceptable? I could probably publish a draft patch at the end of this week. I think this would be useful for other debugging tools, not just llnode.I'm opened to suggestions.
In the meantime, thank you so much for your attention and participation.