[lldb/crashlog] Add support for 32bit frame addresses

[mib]

Summary

This patch adds support for 32bit stack frame addresses in the crashlog
command.

For crash reports that are generated from a arm64_32 process, PAGEZERO is
loaded at 0x00004000 so no code address will be less than 0x4000.

This patch changes the crashlog frame address regex group to match
addresses as small as 4 hex characters.

rdar://100805026

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

[kastiglione]

looks good

[JDevlieghere]

LGTM

lldb/examples/python/crashlog.py

class TextCrashLogParser(CrashLogParser):
     thread_state_regex = re.compile(r'^Thread \d+ crashed with')
     thread_instrs_regex = re.compile(r'^Thread \d+ instruction stream')
     thread_regex = re.compile(r'^Thread (\d+).*:')
     app_backtrace_regex = re.compile(r'^Application Specific Backtrace (\d+).*:')
     version = r'\(.+\)|(?:arm|x86_)[0-9a-z]+'
     frame_regex = re.compile(r'^(\d+)\s+'              # id
                              r'(.+?)\s+'               # img_name
                              r'(?:' +version+ r'\s+)?' # img_version
-                             r'(0x[0-9a-fA-F]{7,})'    # addr (7 chars or more)
+                             r'(0x[0-9a-fA-F]{4,})'    # addr (4 chars or more)
                              r' +(.*)'                 # offs
                             )
-    null_frame_regex = re.compile(r'^\d+\s+\?\?\?\s+0{7,} +')
+    null_frame_regex = re.compile(r'^\d+\s+\?\?\?\s+0{4,} +')
     image_regex_uuid = re.compile(r'(0x[0-9a-fA-F]+)'          # img_lo
                                   r'\s+-\s+'                   #   -
                                   r'(0x[0-9a-fA-F]+)\s+'       # img_hi
                                   r'[+]?(.+?)\s+'              # img_name
                                   r'(?:(' +version+ r')\s+)?'  # img_version
                                   r'(?:<([-0-9a-fA-F]+)>\s+)?' # img_uuid
                                   r'(/.*)'                     # img_path
                                  )