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fe15fe73c8
This commit adds lldbinit files from upstream V8 and also adds these so
that they get installed when `make install` is run.
Original commit message:
[tools] add lldbinit
The goal of this commit is to add the equivalent to gdbinit but
for lldb. I've tried to replicate the commands as close as possible
but I'm unsure about the jss command and hoping to get some feedback
on it in addition to the bta command which I'm not sure how/when
this could be used. This is probably just inexperience on my part.
The lldbinit file can be placed into a directory prefixed with dot
(.lldbinit) and the python script is currently expected to be in the
same directory. The path to the script can be changed manually if
needed as well.
NOTRY=true
Review-Url: https://codereview.chromium.org/2758373002
Cr-Commit-Position: refs/heads/master@{#44136}
PR-URL: https://github.com/nodejs/node/pull/12061
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
73 lines
2.6 KiB
Python
73 lines
2.6 KiB
Python
# 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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