llnode
Node.js v4.x-v6.x C++ plugin for LLDB - a next generation, high-performance debugger.
Demo
Install Instructions
Install with npm
npm install llnodeTo use a particular build of lldb, use the --lldb_exe option:
npm install --lldb_exe=`which lldb-3.9` llnodeInstall with Homebrew (OS X)
brew install llnodeBuild Instructions
OS X
# Clone this repo
git clone https://github.com/nodejs/llnode.git && cd llnode
# Check out source code of the LLDB that is compatible with OS X's default
# lldb
git clone --depth=1 -b release_39 https://github.com/llvm-mirror/lldb.git lldb
# Initialize GYP
git clone https://chromium.googlesource.com/external/gyp.git tools/gyp
# Configure
./gyp_llnode
# Build
make -C out/ -j9
# Install
make install-osxLinux
# Clone this repo
git clone https://github.com/nodejs/llnode.git && cd llnode
# Install lldb and headers
sudo apt-get install lldb-3.8 lldb-3.8-dev
# Initialize GYP
git clone https://chromium.googlesource.com/external/gyp.git tools/gyp
# Configure
./gyp_llnode -Dlldb_dir=/usr/lib/llvm-3.8/
# Build
make -C out/ -j9
# Install
sudo make install-linuxUsage
The llnode plugin can be loaded into LLDB using the plugin load command.
Alternatively it can be installed in the LLDB system plugin directory, in
which case LLDB will load the plugin automatically on start-up.
OS X
lldb
(lldb) plugin load ./node_modules/llnode/llnode.dylib
To install the plugin in the LLDB system plugin directory, use the
make install-osx build step above, or if installing
with npm copy node_modules/llnode/llnode.dylib to
~/Library/Application\ Support/LLDB/PlugIns/.
Linux
lldb
(lldb) plugin load ./node_modules/llnode/llnode.so
To install the plugin in the LLDB system plugin directory, use the
make install-linux build step above, or if installing with
npm copy node_modules/llnode/llnode.so to
/usr/lib/lldb/plugins.
To use llnode with a core dump the core dump needs to be loaded into lldb along with the exact executable that created the core dump. The executable contains information that lldb and llnode need to make sense of the data in the core dump.
To load the core dump when starting lldb use:
lldb /path/to/bin/node -c /path/to/core
or to load the core dump after starting lldb:
(lldb) target create /path/to/bin/node -c /path/to/core
It does not matter whether the plugin load command is issued before or after
loading a core dump.
Commands
(lldb) v8 help
Node.js helpers
Syntax: v8
The following subcommands are supported:
bt -- Show a backtrace with node.js JavaScript functions and their args. An optional argument is accepted; if
that argument is a number, it specifies the number of frames to display. Otherwise all frames will be
dumped.
Syntax: v8 bt [number]
findjsinstances -- List all objects which share the specified map.
Accepts the same options as `v8 inspect`
findjsobjects -- List all object types and instance counts grouped by map and sorted by instance count.
Requires `LLNODE_RANGESFILE` environment variable to be set to a file containing memory ranges for the
core file being debugged.
There are scripts for generating this file on Linux and Mac in the scripts directory of the llnode
repository.
findrefs -- Finds all the object properties which meet the search criteria.
The default is to list all the object properties that reference the specified value.
Flags:
* -v, --value expr - all properties that refer to the specified JavaScript object (default)
* -n, --name name - all properties with the specified name
* -s, --string string - all properties that refer to the specified JavaScript string value
inspect -- Print detailed description and contents of the JavaScript value.
Possible flags (all optional):
* -F, --full-string - print whole string without adding ellipsis
* -m, --print-map - print object's map address
* -s, --print-source - print source code for function objects
* --string-length num - print maximum of `num` characters in string
Syntax: v8 inspect [flags] expr
nodeinfo -- Print information about Node.js
print -- Print short description of the JavaScript value.
Syntax: v8 print expr
source -- Source code information
For more help on any particular subcommand, type 'help <command> <subcommand>'.
LICENSE
This software is licensed under the MIT License.
Copyright Fedor Indutny, 2016.
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent