[Lldb-commits] [lldb] r159286 - /lldb/trunk/examples/python/crashlog.py

[Greg Clayton]

Author: gclayton
Date: Wed Jun 27 15:02:04 2012
New Revision: 159286

URL: http://llvm.org/viewvc/llvm-project?rev=159286&view=rev
Log:
Added a "save_crashlog" command to the lldb.macosx.crashlog package that allow you to dump your current process state out to a crash log file. This will dump all of the target module information with all load addresses, UUID values, and shared library paths, as well as all thread stacks and the crash log header. This will make it easy for us to save the current state of a process and then reload it later into LLDB.


Modified:
    lldb/trunk/examples/python/crashlog.py

Modified: lldb/trunk/examples/python/crashlog.py
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/examples/python/crashlog.py?rev=159286&r1=159285&r2=159286&view=diff
==============================================================================
--- lldb/trunk/examples/python/crashlog.py (original)
+++ lldb/trunk/examples/python/crashlog.py Wed Jun 27 15:02:04 2012
@@ -29,9 +29,11 @@
 import lldb
 import commands
 import cmd
+import datetime
 import glob
 import optparse
 import os
+import platform
 import plistlib
 import pprint # pp = pprint.PrettyPrinter(indent=4); pp.pprint(command_args)
 import re
@@ -480,7 +482,84 @@
     interpreter.do_list()
     interpreter.cmdloop()
     
+
+def save_crashlog(debugger, command, result, dict):
+    usage = "usage: %prog [options] <output-path>"
+    description='''Export the state of current target into a crashlog file'''
+    parser = optparse.OptionParser(description=description, prog='save_crashlog',usage=usage)
+    parser.add_option('-v', '--verbose', action='store_true', dest='verbose', help='display verbose debug info', default=False)
+    try:
+        (options, args) = parser.parse_args(shlex.split(command))
+    except:
+        result.PutCString ("error: invalid options");
+        return
+    if len(args) != 1:
+        result.PutCString ("error: invalid arguments, a single output file is the only valid argument")
+        return
+    out_file = open(args[0], 'w')
+    if not out_file:
+        result.PutCString ("error: failed to open file '%s' for writing...", args[0]);
+        return
+    if lldb.target:
+        identifier = lldb.target.executable.basename
+        if lldb.process:
+            pid = lldb.process.id
+            if pid != lldb.LLDB_INVALID_PROCESS_ID:
+                out_file.write('Process:         %s [%u]\n' % (identifier, pid))
+        out_file.write('Path:            %s\n' % (lldb.target.executable.fullpath))
+        out_file.write('Identifier:      %s\n' % (identifier))
+        out_file.write('\nDate/Time:       %s\n' % (datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")))
+        out_file.write('OS Version:      Mac OS X %s (%s)\n' % (platform.mac_ver()[0], commands.getoutput('sysctl -n kern.osversion')));
+        out_file.write('Report Version:  9\n')
+        for thread_idx in range(lldb.process.num_threads):
+            thread = lldb.process.thread[thread_idx]
+            out_file.write('\nThread %u:\n' % (thread_idx))
+            for (frame_idx, frame) in enumerate(thread.frames):
+                frame_pc = frame.pc
+                frame_offset = 0
+                if frame.function:
+                    block = frame.GetFrameBlock()
+                    block_range = block.range[frame.addr]
+                    if block_range:
+                        block_start_addr = block_range[0]
+                        frame_offset = frame_pc - block_start_addr.load_addr
+                    else:
+                        frame_offset = frame_pc - frame.function.addr.load_addr
+                elif frame.symbol:
+                    frame_offset = frame_pc - frame.symbol.addr.load_addr
+                out_file.write('%-3u %-32s 0x%16.16x %s' % (frame_idx, frame.module.file.basename, frame_pc, frame.name))
+                if frame_offset > 0: 
+                    out_file.write(' + %u' % (frame_offset))
+                line_entry = frame.line_entry
+                if line_entry:
+                    if options.verbose:
+                        # This will output the fullpath + line + column
+                        out_file.write(' %s' % (line_entry))
+                    else:
+                        out_file.write(' %s:%u' % (line_entry.file.basename, line_entry.line))
+                        column = line_entry.column
+                        if column: 
+                            out_file.write(':%u' % (column))
+                out_file.write('\n')
+                
+        out_file.write('\nBinary Images:\n')
+        for module in lldb.target.modules:
+            text_segment = module.section['__TEXT']
+            if text_segment:
+                text_segment_load_addr = text_segment.GetLoadAddress(lldb.target)
+                if text_segment_load_addr != lldb.LLDB_INVALID_ADDRESS:
+                    text_segment_end_load_addr = text_segment_load_addr + text_segment.size
+                    identifier = module.file.basename
+                    module_version = '???'
+                    module_version_array = module.GetVersion()
+                    if module_version_array:
+                        module_version = '.'.join(map(str,module_version_array))
+                    out_file.write ('    0x%16.16x - 0x%16.16x  %s (%s - ???) <%s> %s\n' % (text_segment_load_addr, text_segment_end_load_addr, identifier, module_version, module.GetUUIDString(), module.file.fullpath))
+        out_file.close()
+    else:
+        result.PutCString ("error: invalid target");
         
+    
 def Symbolicate(debugger, command, result, dict):
     try:
         SymbolicateCrashLogs (shlex.split(command))
@@ -623,5 +702,6 @@
     SymbolicateCrashLogs (sys.argv[1:])
 elif getattr(lldb, 'debugger', None):
     lldb.debugger.HandleCommand('command script add -f lldb.macosx.crashlog.Symbolicate crashlog')
-    print '"crashlog" command installed, type "crashlog --help" for detailed help'
+    lldb.debugger.HandleCommand('command script add -f lldb.macosx.crashlog.save_crashlog save_crashlog')
+    print '"crashlog" and "save_crashlog" command installed, use the "--help" option for detailed help'