[lldb/crashlog] Fix crash when loading non-symbolicated report

[mib]

Summary

This patch should address the crashes when parsing a the crash report
frame dictionary.

If the crash report is not symbolicated, the symbolLocation key will
be missing. In that case, we should just use the imageOffset.

rdar://109836386

Signed-off-by: Med Ismail Bennani <[e-mail]>

[bulbazord]

lldb/examples/python/crashlog.py

601–604

nit: Why use single quotes for 'symbol' but double quotes for "symbolLocation"? Did some python formatter gives you this?

[mib]

lldb/examples/python/crashlog.py

601–604

yep

lldb/examples/python/crashlog.py

def parse_frames(self, thread, json_frames):
                 self.crashlog.idents.append(ident)
 
             frame_offset = int(json_frame["imageOffset"])
             image_addr = self.get_used_image(image_id)["base"]
             pc = image_addr + frame_offset
 
             if "symbol" in json_frame:
                 symbol = json_frame["symbol"]
+                location = 0
+                if "symbolLocation" in json_frame and json_frame["symbolLocation"]:
                     location = int(json_frame["symbolLocation"])
                 image = self.images[image_id]
                 image.symbols[symbol] = {
                     "name": symbol,
                     "type": "code",
                     "address": frame_offset - location,
                 }
 
             thread.frames.append(self.crashlog.Frame(idx, pc, frame_offset))