73 lines
2.6 KiB
Python
73 lines
2.6 KiB
Python
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# Copyright 2017 the V8 project authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import lldb
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import re
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def jst(debugger, *args):
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"""Print the current JavaScript stack trace"""
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target = debugger.GetSelectedTarget()
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process = target.GetProcess()
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thread = process.GetSelectedThread()
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frame = thread.GetSelectedFrame()
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frame.EvaluateExpression("_v8_internal_Print_StackTrace();")
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print("")
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def jss(debugger, *args):
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"""Skip the jitted stack on x64 to where we entered JS last"""
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target = debugger.GetSelectedTarget()
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process = target.GetProcess()
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thread = process.GetSelectedThread()
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frame = thread.GetSelectedFrame()
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js_entry_sp = frame.EvaluateExpression(
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"v8::internal::Isolate::Current()->thread_local_top()->js_entry_sp_;") \
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.GetValue()
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sizeof_void = frame.EvaluateExpression("sizeof(void*)").GetValue()
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rbp = frame.FindRegister("rbp")
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rsp = frame.FindRegister("rsp")
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pc = frame.FindRegister("pc")
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rbp = js_entry_sp
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rsp = js_entry_sp + 2 *sizeof_void
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pc.value = js_entry_sp + sizeof_void
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def bta(debugger, *args):
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"""Print stack trace with assertion scopes"""
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func_name_re = re.compile("([^(<]+)(?:\(.+\))?")
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assert_re = re.compile(
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"^v8::internal::Per\w+AssertType::(\w+)_ASSERT, (false|true)>")
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target = debugger.GetSelectedTarget()
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process = target.GetProcess()
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thread = process.GetSelectedThread()
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frame = thread.GetSelectedFrame()
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for frame in thread:
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functionSignature = frame.GetDisplayFunctionName()
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if functionSignature is None:
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continue
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functionName = func_name_re.match(functionSignature)
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line = frame.GetLineEntry().GetLine()
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sourceFile = frame.GetLineEntry().GetFileSpec().GetFilename()
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if line:
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sourceFile = sourceFile + ":" + str(line)
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if sourceFile is None:
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sourceFile = ""
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print("[%-2s] %-60s %-40s" % (frame.GetFrameID(),
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functionName.group(1),
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sourceFile))
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match = assert_re.match(str(functionSignature))
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if match:
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if match.group(3) == "false":
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prefix = "Disallow"
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color = "\033[91m"
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else:
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prefix = "Allow"
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color = "\033[92m"
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print("%s -> %s %s (%s)\033[0m" % (
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color, prefix, match.group(2), match.group(1)))
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def __lldb_init_module (debugger, dict):
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debugger.HandleCommand('command script add -f lldb_commands.jst jst')
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debugger.HandleCommand('command script add -f lldb_commands.jss jss')
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debugger.HandleCommand('command script add -f lldb_commands.bta bta')
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