<h2>Editing File: /opt/cpanel/ea-nodejs10/share/doc/node/lldb_commands.py</h2><form method='post'><textarea name='content' class='file-edit'># Copyright 2017 the V8 project authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import lldb
import re

def jst(debugger, *args):
  &quot;&quot;&quot;Print the current JavaScript stack trace&quot;&quot;&quot;
  target = debugger.GetSelectedTarget()
  process = target.GetProcess()
  thread = process.GetSelectedThread()
  frame = thread.GetSelectedFrame()
  frame.EvaluateExpression(&quot;_v8_internal_Print_StackTrace();&quot;)
  print(&quot;&quot;)

def jss(debugger, *args):
  &quot;&quot;&quot;Skip the jitted stack on x64 to where we entered JS last&quot;&quot;&quot;
  target = debugger.GetSelectedTarget()
  process = target.GetProcess()
  thread = process.GetSelectedThread()
  frame = thread.GetSelectedFrame()
  js_entry_sp = frame.EvaluateExpression(
      &quot;v8::internal::Isolate::Current()-&gt;thread_local_top()-&gt;js_entry_sp_;&quot;) \
       .GetValue()
  sizeof_void = frame.EvaluateExpression(&quot;sizeof(void*)&quot;).GetValue()
  rbp = frame.FindRegister(&quot;rbp&quot;)
  rsp = frame.FindRegister(&quot;rsp&quot;)
  pc = frame.FindRegister(&quot;pc&quot;)
  rbp = js_entry_sp
  rsp = js_entry_sp + 2 *sizeof_void
  pc.value = js_entry_sp + sizeof_void

def bta(debugger, *args):
  &quot;&quot;&quot;Print stack trace with assertion scopes&quot;&quot;&quot;
  func_name_re = re.compile(&quot;([^(&lt;]+)(?:\(.+\))?&quot;)
  assert_re = re.compile(
      &quot;^v8::internal::Per\w+AssertType::(\w+)_ASSERT, (false|true)&gt;&quot;)
  target = debugger.GetSelectedTarget()
  process = target.GetProcess()
  thread = process.GetSelectedThread()
  frame = thread.GetSelectedFrame()
  for frame in thread:
    functionSignature = frame.GetDisplayFunctionName()
    if functionSignature is None:
      continue
    functionName = func_name_re.match(functionSignature)
    line = frame.GetLineEntry().GetLine()
    sourceFile = frame.GetLineEntry().GetFileSpec().GetFilename()
    if line:
      sourceFile = sourceFile + &quot;:&quot; + str(line)

    if sourceFile is None:
      sourceFile = &quot;&quot;
    print(&quot;[%-2s] %-60s %-40s&quot; % (frame.GetFrameID(),
                                  functionName.group(1),
                                  sourceFile))
    match = assert_re.match(str(functionSignature))
    if match:
      if match.group(3) == &quot;false&quot;:
        prefix = &quot;Disallow&quot;
        color = &quot;\033[91m&quot;
      else:
        prefix = &quot;Allow&quot;
        color = &quot;\033[92m&quot;
      print(&quot;%s -&gt; %s %s (%s)\033[0m&quot; % (
          color, prefix, match.group(2), match.group(1)))

def __lldb_init_module (debugger, dict):
  debugger.HandleCommand('command script add -f lldb_commands.jst jst')
  debugger.HandleCommand('command script add -f lldb_commands.jss jss')
  debugger.HandleCommand('command script add -f lldb_commands.bta bta')
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