for Linux Kernel Debugging Feng Li (李枫) hkli2013@126.com Oct 19，2019 PyCon China Hangzhou 2019 Agenda I. Linux Kernel Overview V. Practice on ARM  Development Environment  My Practice VI. Wrap-up I. Linux Kernel Debugging 1) Overview DTrace  https://en.wikipedia.org/wiki/DTrace a comprehensive oracle.com/en/operating-systems/oracle-linux/ dtrace-guide/ …  http://www.brendangregg.com/dtrace.html Linux Tracing Landscape  a

open-source package management system and environment management system that runs on Windows, macOS, and Linux. Conda quickly installs, runs, and updates packages and their dependencies. Conda easily creates, "depends": [ "depend > 1.1.1" ], "license": "BSD 3-Clause", "name": "fun-packge", "platform": "linux", "subdir": "linux-64", "timestamp": 1535416612069, "version": "0.0.0" } • paths.json – a list of files "Scripts/script2.bat" "C:/Users/username/anaconda/envs/_build" binary "Scripts/binary" EXAMPLE: On macOS or Linux: bin/script.sh /Users/username/anaconda/envs/_build binary bin/binary /Users/username/anaconda/envs/_build

open-source package management system and environment management system that runs on Windows, macOS, and Linux. Conda quickly installs, runs, and updates packages and their dependencies. Conda easily creates, "depends": [ "depend > 1.1.1" ], "license": "BSD 3-Clause", "name": "fun-packge", "platform": "linux", "subdir": "linux-64", "timestamp": 1535416612069, "version": "0.0.0" } • paths.json – a list of files "Scripts/script2.bat" "C:/Users/username/anaconda/envs/_build" binary "Scripts/binary" EXAMPLE: On macOS or Linux: bin/script.sh /Users/username/anaconda/envs/_build binary bin/binary /Users/username/anaconda/envs/_build

package from the conda- forge [https://conda-forge.org/] channel, which has up-to-date packages for Linux, Windows and OS X. To install Scrapy using conda, run: conda install -c conda-forge scrapy Alternatively [https://virtualenv.pypa.io/en/stable/userguide/] on how to create your virtualenv. Note If you use Linux or OS X, virtualenvwrapper [https://virtualenvwrapper.readthedocs.io/en/latest/install.html] is a that: pip install scrapy Note The same non-Python dependencies can be used to install Scrapy in Debian Jessie (8.0) and above. Mac OS X Building Scrapy’s dependencies requires the presence of a C compiler

“database”interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321 11.9 gdbm —GNU’s reinterpretation of dbm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322 11.10 . . . . . . . . . . . 670 16.8 readline —GNU readline 接口 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 673 16.9 rlcompleter —GNU readline 的补全函数 . . . . . . . . . . . . . . The Python Library Reference, 发布 2.7.18 对于“文件大小”的解析可因文件类型的不同而变化。对于普通文件就是文件的字节数。对于大部分种类 的 Unix（特别包括 Linux）的 FIFO 和套接字来说，“大小”则是指在调用os.stat(), os.fstat() 或os. lstat() 时等待读取的字节数；这在某些时候很有用处，特别是在一个非阻塞的打开后轮询这些特殊文件

“database”interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321 11.9 gdbm —GNU’s reinterpretation of dbm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322 11.10 . . . . . . . . . . . 670 16.8 readline —GNU readline 接口 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 673 16.9 rlcompleter —GNU readline 的补全函数 . . . . . . . . . . . . . . The Python Library Reference, 发布 2.7.18 对于“文件大小”的解析可因文件类型的不同而变化。对于普通文件就是文件的字节数。对于大部分种类 的 Unix（特别包括 Linux）的 FIFO 和套接字来说，“大小”则是指在调用os.stat(), os.fstat() 或os. lstat() 时等待读取的字节数；这在某些时候很有用处，特别是在一个非阻塞的打开后轮询这些特殊文件

“database”interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321 11.9 gdbm —GNU’s reinterpretation of dbm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322 11.10 . . . . . . . . . . . 670 16.8 readline —GNU readline 接口 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 673 16.9 rlcompleter —GNU readline 的补全函数 . . . . . . . . . . . . . . The Python Library Reference, 发布 2.7.18 对于“文件大小”的解析可因文件类型的不同而变化。对于普通文件就是文件的字节数。对于大部分种类 的 Unix（特别包括 Linux）的 FIFO 和套接字来说，“大小”则是指在调用os.stat(), os.fstat() 或os. lstat() 时等待读取的字节数；这在某些时候很有用处，特别是在一个非阻塞的打开后轮询这些特殊文件

package from the conda-forge [https://conda-forge.org/] channel, which has up-to-date packages for Linux, Windows and OS X. To install Scrapy using conda, run: conda install -c conda-forge scrapy Alternatively [https://virtualenv.pypa.io/en/stable/userguide/] on how to create your virtualenv. Note If you use Linux or OS X, virtualenvwrapper [https://virtualenvwrapper.readthedocs.io/en/latest/install.html] is a that: pip install scrapy Note The same non-Python dependencies can be used to install Scrapy in Debian Jessie (8.0) and above. Mac OS X Building Scrapy’s dependencies requires the presence of a C compiler

package from the conda-forge [https://conda-forge.org/] channel, which has up-to-date packages for Linux, Windows and macOS. To install Scrapy using conda, run: conda install -c conda-forge scrapy Alternatively that: pip install scrapy Note The same non-Python dependencies can be used to install Scrapy in Debian Jessie (8.0) and above. macOS Building Scrapy’s dependencies requires the presence of a C compiler Scrapy PyPy We recommend using the latest PyPy version. The version tested is 5.9.0. For PyPy3, only Linux installation was tested. Most Scrapy dependencides now have binary wheels for CPython, but not for

package from the conda-forge [https://conda-forge.org/] channel, which has up-to-date packages for Linux, Windows and macOS. To install Scrapy using conda, run: conda install -c conda-forge scrapy Alternatively that: pip install scrapy Note The same non-Python dependencies can be used to install Scrapy in Debian Jessie (8.0) and above. macOS Building Scrapy’s dependencies requires the presence of a C compiler Scrapy PyPy We recommend using the latest PyPy version. The version tested is 5.9.0. For PyPy3, only Linux installation was tested. Most Scrapy dependencies now have binary wheels for CPython, but not for