Non-documented API & headers - c++

Question

I'm using JavaScriptCore in one of my Objective-C project, and I'd like to know at any time what's the current file & line when falling into a JS callback.
There is no way to do it with the public headers, so I took a look at the sources and it seems possible to access the file & line by using some C++ code.
// ctx is a JSContextRef, that's the only type I have an access to
JSC::JSValue jsCtx = toJS(ctx);
CodeBlock* codeBlock = jsCtx->codeBlock();
// Line
unsigned sourceOffset = codeBlock->sourceOffset();
// Source URL
SourceProvider* sourceProvider = codeBlock->source();
const String& url = sourceProvider->url();
It obviously requires the definitions of JSC, JSValue, CodeBlock, and SourceProvider. I have all these in separate headers, but it's really massive.
Should I directly include those headers?
What if those files require other headers? I might end by having multiple headers that I won't use.
Let's forget that the internal source code might change: is what I want to do even possible?

Answer 1

You can know this information from the public Headers itself. Here you go:
When the exception occurs, the exception object contains the following keys:
line, sourceId, sourceURL, name, message
You can access the values for these keys to find in which file (sourceURL) and in which line number (line) the exception has occurred.
Example:
JSObjectRef exceptionObj = JSValueToObject(context, exception, NULL);
//Convert the exceptionObj into dictionary (I leave the implementation of this to you..)
NSDictionary *exceptionDict = [self convertJSObjectToDictionary:exceptionObj];
NSString *lineNumber = [exceptionDict objectForKey:#"line"];
NSString *fileName = [exceptionDict objectForKey:#"sourceURL"];
NSLog(#"Exception has occurred in file:%# at line number:%#", fileName, lineNumber);
Hope this helps!
~ Sunil Phani Manne