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Small changes to diagnose_unwind. Correctly provide help text. 

Print the lldb version at the top of the output.

llvm-svn: 183289
This commit is contained in:
Jason Molenda 2013-06-05 02:56:58 +00:00
parent 7595447b15
commit 811d259bb1
1 changed files with 15 additions and 6 deletions
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21
lldb/examples/python/diagnose_unwind.py
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@ -1,8 +1,10 @@
# This implements the "diagnose-unwind" command, usually installed in the debug session like # This implements the "diagnose-unwind" command, usually installed
# in the debug session like
# command script import lldb.diagnose # command script import lldb.diagnose
# it is used when lldb's backtrace fails -- it collects and prints information about the stack frames, # it is used when lldb's backtrace fails -- it collects and prints
# and tries an alternate unwind algorithm, that will help to understand why lldb's unwind algorithm did # information about the stack frames, and tries an alternate unwind
# not succeed. # algorithm, that will help to understand why lldb's unwind algorithm
# did not succeed.
import optparse import optparse
import lldb import lldb
@ -88,8 +90,14 @@ def simple_backtrace(debugger):
backtrace_print_frame (target, frame_num, cur_pc, cur_fp) backtrace_print_frame (target, frame_num, cur_pc, cur_fp)
def diagnose_unwind(debugger, command, result, dict): def diagnose_unwind(debugger, command, result, dict):
# Use the Shell Lexer to properly parse up command options just like a """
# shell would Gather diagnostic information to help debug incorrect unwind (backtrace)
behavior in lldb. When there is a backtrace that doesn't look
correct, run this command with the correct thread selected and a
large amount of diagnostic information will be printed, it is likely
to be helpful when reporting the problem.
"""
command_args = shlex.split(command) command_args = shlex.split(command)
parser = create_diagnose_unwind_options() parser = create_diagnose_unwind_options()
try: try:
@ -110,6 +118,7 @@ def diagnose_unwind(debugger, command, result, dict):
if len(lldb_versions_match.groups()) >= 5 and lldb_versions_match.groups()[4]: if len(lldb_versions_match.groups()) >= 5 and lldb_versions_match.groups()[4]:
lldb_minor = int(lldb_versions_match.groups()[4]) lldb_minor = int(lldb_versions_match.groups()[4])
print 'LLDB version %s' % debugger.GetVersionString()
print 'Unwind diagnostics for thread %d' % thread.GetIndexID() print 'Unwind diagnostics for thread %d' % thread.GetIndexID()
print "" print ""
print "lldb's unwind algorithm:" print "lldb's unwind algorithm:"