[lldb/crashlog] Skip non-crashed threads in batch mode

[mib]

Summary

When using the crashlog command in batch mode, most users only care
about the crashed thread and end up having to scroll past all the
non-crashed threads, which is not a good user experience.

Now that -c|--crashed-only is set by default, we should also apply
that behavior for batch mode: Only the crashed thread and "Application
Specific Backtrace" threads will be shown to the user in batch mode.

The user will still have the ability to show all the threads if they use
--no-crashed-only which will parse the symbols from the report, or
with -a|--load-all-images which will fetch binaries and debug info
from the build record and symbolicate every thread.

rdar://106329893

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

[JDevlieghere]

LGTM

lldb/examples/python/crashlog.py

def parse(self):
                         if self.thread.index == self.crashlog.crashed_thread_idx:
                             self.thread.reason = ""
                             if hasattr(self.crashlog, "thread_exception"):
                                 self.thread.reason += self.crashlog.thread_exception
                             if hasattr(self.crashlog, "thread_exception_data"):
                                 self.thread.reason += (
                                     " (%s)" % self.crashlog.thread_exception_data
                                 )
+                            self.thread.crashed = True
                         if self.app_specific_backtrace:
                             self.crashlog.backtraces.append(self.thread)
                         else:
                             self.crashlog.threads.append(self.thread)
                     self.thread = None
 
                 empty_lines = 1
                 while (
with tempfile.TemporaryDirectory() as obj_dir:
                     loaded_images.append(image)
 
     if crash_log.backtraces:
         for thread in crash_log.backtraces:
             thread.dump_symbolicated(crash_log, options)
             print()
 
     for thread in crash_log.threads:
+        if options.crashed_only and not (
+            thread.crashed or thread.app_specific_backtrace
+        ):
+            continue
         thread.dump_symbolicated(crash_log, options)
         print()
 
     if crash_log.errors:
         print("Errors:")
         for error in crash_log.errors:
             print(error)