I'm developing some features for llnode, a LLDB plugin that allows better
postmortem debugging for NodeJS, and while developing one of those features
I needed to access a Context object from an Isolate object, which is very
easy using V8 API, Unfortunately it's not possible to call any functions or
methods inside LLDB when analyzing a core dump file, so the only way I
found to access the Context object was by accessing
Isolate::thread_local_top_, and then doing the same to access
ThreadLocalTop::context_. To do so, I needed to change
gen-postmortem-metadata.py and add the following symbols that represents
the offsets of both attributes:
consts_misc = [
# ...
{ 'name': 'IsolateThreadLocalTop', 'value': '(size_t)
(((v8::internal::Isolate*)0)->thread_local_top())' },
{ 'name': 'ThreadLocalTopContext', 'value': '(size_t)
&(((v8::internal::ThreadLocalTop*)0)->context_)' },
];
Is there an easier way to access the Context object from an Isolate object?
If not, those changes I made are acceptable for submission?
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