The LLDB Debugger in Freebsd
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Digital Technical Journal, Number 3, September 1986: Networking
Netwo;king Products Digital TechnicalJournal Digital Equipment Corporation Number 3 September I 986 Contents 8 Foreword William R. Johnson, Jr. New Products 10 Digital Network Architecture Overview Anthony G. Lauck, David R. Oran, and Radia J. Perlman 2 5 PerformanceAn alysis andModeling of Digital's Networking Architecture Raj Jain and William R. Hawe 35 The DECnetjSNA Gateway Product-A Case Study in Cross Vendor Networking John P:.. �orency, David Poner, Richard P. Pitkin, and David R. Oran ._ 54 The Extended Local Area Network Architecture and LANBridge 100 William R. Hawe, Mark F. Kempf, and Alan). Kirby 7 3 Terminal Servers on Ethernet Local Area Networks Bruce E. Mann, Colin Strutt, and Mark F. Kempf 88 The DECnet-VAXProduct -A n IntegratedAp proach to Networking Paul R. Beck and James A. Krycka 100 The DECnet-ULTRIXSoftware John Forecast, James L. Jackson, and Jeffrey A. Schriesheim 108 The DECnet-DOS System Peter 0. Mierswa, David). Mitton, and Ma�ha L. Spence 117 The Evolution of Network Management Products Nancy R. La Pelle, Mark). Seger, and Mark W. Sylor 129 The NMCCjDECnet Monitor Design Mark W. Sylor 1 Editor's Introduction The paper by Bill Hawe, Mark Kempf, and AI Kirby reports how studies of potential new broad band products led to the development of the Extended LAN Architecture. The design of the LANBridge 100, the first product incorporating that architecture, is described, along with the trade-offs made to achieve high performance. The speed of communication between terminals and systems depends on how they are connected. Bruce Mann, Colin Strutt, and Mark Kempf explain how they developed the LAT protocol to connect terminals to hosts on an Ethernet. -
Name Description Files Notes See Also Colophon
PTS(4) Linux Programmer’sManual PTS(4) NAME ptmx, pts − pseudoterminal master and slave DESCRIPTION The file /dev/ptmx is a character file with major number 5 and minor number 2, usually with mode 0666 and ownership root:root. It is used to create a pseudoterminal master and slave pair. When a process opens /dev/ptmx,itgets a file descriptor for a pseudoterminal master (PTM), and a pseu- doterminal slave (PTS) device is created in the /dev/pts directory.Each file descriptor obtained by opening /dev/ptmx is an independent PTM with its own associated PTS, whose path can be found by passing the file descriptor to ptsname(3). Before opening the pseudoterminal slave,you must pass the master’sfile descriptor to grantpt(3) and un- lockpt(3). Once both the pseudoterminal master and slave are open, the slave provides processes with an interface that is identical to that of a real terminal. Data written to the slave ispresented on the master file descriptor as input. Data written to the master is presented to the slave asinput. In practice, pseudoterminals are used for implementing terminal emulators such as xterm(1), in which data read from the pseudoterminal master is interpreted by the application in the same way a real terminal would interpret the data, and for implementing remote-login programs such as sshd(8), in which data read from the pseudoterminal master is sent across the network to a client program that is connected to a terminal or terminal emulator. Pseudoterminals can also be used to send input to programs that normally refuse to read input from pipes (such as su(1), and passwd(1)). -
A Multiplatform Pseudo Terminal
A Multi-Platform Pseudo Terminal API Project Report Submitted in Partial Fulfillment for the Masters' Degree in Computer Science By Qutaiba Mahmoud Supervised By Dr. Clinton Jeffery ABSTRACT This project is the construction of a pseudo-terminal API, which will provide a pseudo-terminal interface access to interactive programs. The API is aimed at developing an extension to the Unicon language to allow Unicon programs to easily utilize applications that require user interaction via a terminal. A pseudo-terminal is a pair of virtual devices that provide a bidirectional communication channel. This project was constructed to enable an enhancement to a collaborative virtual environment, because it will allow external tools such to be utilized within the same environment. In general the purpose of this API is to allow the UNICON runtime system to act as the user via the terminal which is provided by the API, the terminal is in turn connected to a client process such as a compiler, debugger, or an editor. It can also be viewed as a way for the UNICON environment to control and customize the input and output of external programs. Table of Contents: 1. Introduction 1.1 Pseudo Terminals 1.2 Other Terminals 1.3 Relation To Other Pseudo Terminal Applications. 2. Methodology 2.1 Pseudo Terminal API Function Description 3. Results 3.1 UNIX Implementation 3.2 Windows Implementation 4. Conclusion 5. Recommendations 6. References Acknowledgments I would like to thank my advisor, Dr. Clinton Jeffery, for his support, patience and understanding. Dr. Jeffery has always been prompt in delivering and sharing his knowledge and in providing his assistance. -
Challenges in Debugging Dynamically Compiled Languages As Exemplified by C# Debugger for Tizen
Samsung R&D Institute Russia Center of System Software Challenges in debugging dynamically compiled languages as exemplified by C# debugger for Tizen Dmitri Botcharnikov 1 Agenda Dynamically compiled languages Tizen .NET Debugging Challenges Tizen .NET Debugger internals Future plans 2 Dynamically compiled languages Dynamically (Just-In-Time) compiled languages VM manages low-level details: memory allocation, exception handling But for debuggers… 3 Tizen .NET Visual Studio Tools for Tizen preview were released C# was added to Tizen Over 1,400,000 C# developers worldwide Tizen running on 50 millions Samsung devices (TV, wearables, mobile, IoT) http://developer.tizen.org 4 Technologies Tizen OS (emulator, platform-specific APIs) Xamarin.Forms .NET Core (CoreCLR, CoreFX, Roslyn) Visual Studio 2015 (Windows) 5 C# Compilation & Execution C# source MSIL Output CLR Roslyn JIT Language-specific compiler: C# => MSIL CLR JIT compiler: MSIL => native code 6 Debugging Challenges Source code to native code mapping ◦ C# compiler generates debugging information for source code to MSIL mapping Stepping in and over ◦ Stepping into not yet compiled code ◦ Managed exception handlers ◦ Lambdas, closures & iterators Local variables & arguments inspection ◦ C# compiler generates debugging information for MSIL variables 7 LLDB Subproject of LLVM (http://lldb.llvm.org) Native debugger builds on LLVM and Clang libraries Supports X86 and ARM architectures 8 SOS debugger plug-in Plug-in for LLDB (libsosplugin.so, libsos.so) Port of SOS.dll -
LLDB Tutorial: Adding Debugger Support for Your Target LLVM 2016 Tutorial
LLDB Tutorial: Adding debugger support for your target LLVM 2016 tutorial Deepak Panickal Andrzej Warzyński Codeplay Soware @codeplayso March 18, 2016 Outline • LLDB architecture crash course I Overview of LLDB I User scenarios such as breakpoints, stack-walking etc. I Debugging ps • Both generic and specialized architectures are covered I MSP430 lldb debugging, which we have implemented for this tutorial I github.com/codeplaysoftware/lldb-msp430 I ARM architecture is also referred to for the generic cases • Focusing on debugging ELF executables on Linux EuroLLVM 2016 Outline 2 / 54 Overview Part 1: The Basics Part 2: ELF And Architecture Support Part 3: Registers Part 4: Memory and Breakpoints Part 5: Other Key Features Part 6: Debugging Tips Part 7: MSP430 Quick Recap EuroLLVM 2016 Outline 3 / 54 Part 1 The Basics EuroLLVM 2016 Part 1: The Basics 4 / 54 LLDB - Architecture lldb user driver TCP Socket GDB RSP . lldb-server debug API Architecture of LLDB LLDB offers mulple opons: I user drivers: command line, lldb-mi, Python I debug API: ptrace/simulator/runme/actual drivers EuroLLVM 2016 Part 1: The Basics 5 / 54 lldb/lldb-server lldb • Runs on host • Interacts with the user • Understands symbols, DWARF informaon, data formats, etc. • Plugin architecture I ProcessGDBRemote, DynamicLoaderPOSIXDYLD, ABISysV_msp430 are some... lldb-server • Runs on both remote and host, communicates to lldb via RSP over whichever medium is available • Interacts with the hardware/simulator • Deals with binary data and memory addresses • Plugin architecture I ObjectFileELF, ProcessLinux, are some... EuroLLVM 2016 Part 1: The Basics 6 / 54 GDB Remote Serial Protocol • Simple, ASCII message based protocol • Designed for debugging remote targets • Originally developed for gdb<->gdbserver communicaon • Extended for LLDB, see lldb-gdb-remote.txt Packet structure: checksum $. -
Openextensions POSIX Conformance Document
z/VM Version 7 Release 1 OpenExtensions POSIX Conformance Document IBM GC24-6298-00 Note: Before you use this information and the product it supports, read the information in “Notices” on page 73. This edition applies to version 7, release 1, modification 0 of IBM z/VM (product number 5741-A09) and to all subsequent releases and modifications until otherwise indicated in new editions. Last updated: 2018-09-12 © Copyright International Business Machines Corporation 1993, 2018. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents List of Tables........................................................................................................ ix About This Document............................................................................................xi Intended Audience......................................................................................................................................xi Conventions Used in This Document.......................................................................................................... xi Where to Find More Information.................................................................................................................xi Links to Other Documents and Websites.............................................................................................. xi How to Send Your Comments to IBM....................................................................xiii Summary of Changes for z/VM -
1.0', Packages=['Tester'], Install Requires=['Invoke'], Entry Points={ 'Console Scripts':['Tester = Tester.Main:Program.Run'] } )
Invoke Release Jan 10, 2020 Contents 1 Getting started 3 1.1 Getting started..............................................3 2 The invoke CLI tool 9 2.1 inv[oke] core usage..........................................9 3 Concepts 13 3.1 Configuration............................................... 13 3.2 Invoking tasks.............................................. 19 3.3 Using Invoke as a library......................................... 28 3.4 Loading collections........................................... 32 3.5 Constructing namespaces........................................ 33 3.6 Testing Invoke-using codebases..................................... 39 3.7 Automatically responding to program output.............................. 41 4 API 43 4.1 __init__ ................................................ 43 4.2 collection .............................................. 43 4.3 config ................................................. 46 4.4 context ................................................ 52 4.5 exceptions .............................................. 56 4.6 executor ................................................ 59 4.7 loader ................................................. 61 4.8 parser ................................................. 61 4.9 program ................................................ 65 4.10 runners ................................................ 68 4.11 tasks .................................................. 76 4.12 terminals ............................................... 79 4.13 util .................................................. -
Nateguyver Breakpoints LLDB Debug Toolchain More
��������������������������� ��������������������������� �������� ����������������������������������������������������������������������������������� ���������������������������������������������������������������������������������������������� ������������������������������������������������������������������������������������������� ������������������������������� ��������������������������������������������������������������������������������������� ����������������������������������������������������������������������� �������������������������������������������������������������������������������������� �������������������������������������������� ◼ Breakpoints & watchpoints ◼ Xcode's graphical debugger ◼ LLDB �������������� “ ������������������������������������������������������������������������������������ ��������������������������� ”������������������ ���������������������������� ◼ Assertions, Logging, and Debug configuration ◼ Static analysis & runtime memory tools ◼ Unit testing in xcode ���������������� ◼ Emphasis on LLDB as our debugging foundation ◼ Tips and tricks to stramline your the debuggin experience ◼ Use LLDB as an extensible investigative tool “�������������”������������ “��’���������������������������������������������������’���������������������’�������������� ��������’����������������������������������� ”������������������ ��������������������������������������������������� ���������������������������������������������������������������������������������� ���������������������������������������������������������������������������� -
Building Embedded Linux Systems ,Roadmap.18084 Page Ii Wednesday, August 6, 2008 9:05 AM
Building Embedded Linux Systems ,roadmap.18084 Page ii Wednesday, August 6, 2008 9:05 AM Other Linux resources from O’Reilly Related titles Designing Embedded Programming Embedded Hardware Systems Linux Device Drivers Running Linux Linux in a Nutshell Understanding the Linux Linux Network Adminis- Kernel trator’s Guide Linux Books linux.oreilly.com is a complete catalog of O’Reilly’s books on Resource Center Linux and Unix and related technologies, including sample chapters and code examples. ONLamp.com is the premier site for the open source web plat- form: Linux, Apache, MySQL, and either Perl, Python, or PHP. Conferences O’Reilly brings diverse innovators together to nurture the ideas that spark revolutionary industries. We specialize in document- ing the latest tools and systems, translating the innovator’s knowledge into useful skills for those in the trenches. Visit con- ferences.oreilly.com for our upcoming events. Safari Bookshelf (safari.oreilly.com) is the premier online refer- ence library for programmers and IT professionals. Conduct searches across more than 1,000 books. Subscribers can zero in on answers to time-critical questions in a matter of seconds. Read the books on your Bookshelf from cover to cover or sim- ply flip to the page you need. Try it today for free. main.title Page iii Monday, May 19, 2008 11:21 AM SECOND EDITION Building Embedded Linux SystemsTomcat ™ The Definitive Guide Karim Yaghmour, JonJason Masters, Brittain Gilad and Ben-Yossef, Ian F. Darwin and Philippe Gerum Beijing • Cambridge • Farnham • Köln • Sebastopol • Taipei • Tokyo Building Embedded Linux Systems, Second Edition by Karim Yaghmour, Jon Masters, Gilad Ben-Yossef, and Philippe Gerum Copyright © 2008 Karim Yaghmour and Jon Masters. -
UNIX System Services Z/OS Version 1 Release 7 Implementation
Front cover UNIX System Services z/OS Version 1 Release 7 Implementation z/OS UNIX overview z/OS UNIX setup z/OS UNIX usage Paul Rogers Theodore Antoff Patrick Bruinsma Paul-Robert Hering Lutz Kühner Neil O’Connor Lívio Sousa ibm.com/redbooks International Technical Support Organization UNIX System Services z/OS Version 1 Release 7 Implementation March 2006 SG24-7035-01 Note: Before using this information and the product it supports, read the information in “Notices” on page xiii. Second Edition (March 2006) This edition applies to Version 1 Release 7 of z/OS (5637-A01), and Version 1, Release 7 of z/OS.e (5655-G52), and to all subsequent releases and modifications until otherwise indicated in new editions. © Copyright International Business Machines Corporation 2003, 2006. All rights reserved. Note to U.S. Government Users Restricted Rights -- Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Notices . xiii Trademarks . xiv Preface . .xv The team that wrote this redbook. .xv Become a published author . xvi Comments welcome. xvii Chapter 1. UNIX overview. 1 1.1 UNIX fundamentals . 2 1.1.1 UNIX objectives . 2 1.1.2 What people like about UNIX . 2 1.1.3 What people don’t like about UNIX . 3 1.1.4 UNIX operating system . 3 1.1.5 UNIX file system . 4 1.1.6 Parameter files . 6 1.1.7 Daemons. 6 1.1.8 Accessing UNIX . 6 1.1.9 UNIX standards. 7 1.1.10 MVS and UNIX functional comparison . 8 1.2 z/OS UNIX System Services fundamentals . -
NSWI 0138: Advanced Unix Programming
NSWI 0138: Advanced Unix programming (c) 2011-2016 Vladim´ırKotal (c) 2009-2010 Jan Pechanec, Vladim´ırKotal SISAL MFF UK, Malostransk´en´am.25, 118 00 Praha 1 Charles University Czech Republic Vladim´ırKotal [email protected] March 10, 2016 1 Vladim´ırKotal NSWI 0138 (Advanced Unix programming) Contents 1 Overview 5 1.1 What is this lecture about? . .5 1.2 The lecture will cover... .5 1.3 A few notes on source code files . .6 2 Testing 6 2.1 Why?...........................................6 2.2 When ? . .6 2.3 Types of testing . .7 3 Debugging 8 3.1 Debuging in general . .8 3.2 Observing . .9 3.3 Helper tools . .9 3.3.1 ctags . .9 3.3.2 cscope . 10 3.3.3 OpenGrok . 11 3.3.4 Other tools . 11 3.4 Debugging data . 11 3.4.1 stabs . 11 3.4.2 DWARF . 12 3.4.3 CTF (Compact C Type Format) . 12 3.5 Resource leaks . 13 3.6 libumem . 13 3.6.1 How does libumem work . 14 3.6.2 Using libumem+mdb to find memory leaks . 14 3.6.3 How does ::findleaks work . 16 3.7 watchmalloc . 17 3.8 Call tracing . 18 3.9 Using /proc . 19 3.10 Debugging dynamic libraries . 20 3.11 Debuggers . 20 3.12 Symbol search and interposition . 20 3.13 dtrace . 21 4 Terminals 21 4.1 Terminal I/O Overview . 21 4.2 Terminal I/O Overview (cont.) . 22 4.3 Physical (Hardware) Terminal . 24 4.4 stty(1) command . 24 4.5 TTY Driver Connected To a Phy Terminal . -
Greg Kroah-Hartman [email protected] Github.Com/Gregkh/Presentation-Kdbus
kdbus IPC for the modern world Greg Kroah-Hartman [email protected] github.com/gregkh/presentation-kdbus Interprocess Communication ● signal ● synchronization ● communication standard signals realtime The Linux Programming Interface, Michael Kerrisk, page 878 POSIX semaphore futex synchronization named eventfd unnamed semaphore System V semaphore “record” lock file lock file lock mutex threads condition variables barrier read/write lock The Linux Programming Interface, Michael Kerrisk, page 878 data transfer pipe communication FIFO stream socket pseudoterminal POSIX message queue message System V message queue memory mapping System V shared memory POSIX shared memory shared memory memory mapping Anonymous mapping mapped file The Linux Programming Interface, Michael Kerrisk, page 878 Android ● ashmem ● pmem ● binder ashmem ● POSIX shared memory for the lazy ● Uses virtual memory ● Can discard segments under pressure ● Unknown future pmem ● shares memory between kernel and user ● uses physically contigous memory ● GPUs ● Unknown future binder ● IPC bus for Android system ● Like D-Bus, but “different” ● Came from system without SysV types ● Works on object / message level ● Needs large userspace library ● NEVER use outside an Android system binder ● File descriptor passing ● Used for Intents and application separation ● Good for small messages ● Not for streams of data ● NEVER use outside an Android system QNX message passing ● Tight coupling to microkernel ● Send message and control, to another process ● Used to build complex messages