This is presentation from WG.NET (May 2019), where I'm discussing different aspects of virtualization, mainly in the context of programming languages. We'll covering up what stack vs. register based virtual machines are, what is interpreter and compiler and how to build our own bytecode interpreter for a toy programming language.
eBPF has 64-bit general purpose registers, therefore 32-bit architectures normally need to use register pair to model them and need to generate extra instructions to manipulate the high 32-bit in the pair. Some of these overheads incurred could be eliminated if JIT compiler knows only the low 32-bit of a register is interested. This could be known through data flow (DF) analysis techniques. Either the classic iterative DF analysis or "path-sensitive" version based on verifier's code path walker.
In this talk, implementations for both versions of DF analyzer will be presented. We will see how a def-use chain based classic eBPF DF analyser looks first, and will see the possibility to integrate it with previous proposed eBPF control flow graph framework to make a stand-alone eBPF global DF analyser which could potentially serve as a library. Then, another "path-sensitive" DF analyser based on the existing verifier code path walker will be presented. We will discuss how function calls, path prune, path switch affect the implementation. Finally, we will summarize pros and cons for each, and will see how could each of them be adapted to 64-bit and 32-bit architecture back-ends.
Also, eBPF has 32-bit sub-register and ALU32 instructions associated, enable them (-mattr=+alu32) in LLVM code-gen could let the generated eBPF sequences carry more 32-bit information which could potentially easy flow analyser. This will be briefly discussed in the talk as well.
Pragmatic Optimization in Modern Programming - Mastering Compiler OptimizationsMarina Kolpakova
Explains compilers optimizations, gives taxanomy and examples. The examples are mostly compiler for ARM armv7-a and armv8-a targets, but most of optimizations are machine independent.
Pragmatic Optimization in Modern Programming - Ordering Optimization ApproachesMarina Kolpakova
The slides give an idea about how to look pragmatically at software optimization and order optimization approaches according to this pragmatic point of view
This is presentation from WG.NET (May 2019), where I'm discussing different aspects of virtualization, mainly in the context of programming languages. We'll covering up what stack vs. register based virtual machines are, what is interpreter and compiler and how to build our own bytecode interpreter for a toy programming language.
eBPF has 64-bit general purpose registers, therefore 32-bit architectures normally need to use register pair to model them and need to generate extra instructions to manipulate the high 32-bit in the pair. Some of these overheads incurred could be eliminated if JIT compiler knows only the low 32-bit of a register is interested. This could be known through data flow (DF) analysis techniques. Either the classic iterative DF analysis or "path-sensitive" version based on verifier's code path walker.
In this talk, implementations for both versions of DF analyzer will be presented. We will see how a def-use chain based classic eBPF DF analyser looks first, and will see the possibility to integrate it with previous proposed eBPF control flow graph framework to make a stand-alone eBPF global DF analyser which could potentially serve as a library. Then, another "path-sensitive" DF analyser based on the existing verifier code path walker will be presented. We will discuss how function calls, path prune, path switch affect the implementation. Finally, we will summarize pros and cons for each, and will see how could each of them be adapted to 64-bit and 32-bit architecture back-ends.
Also, eBPF has 32-bit sub-register and ALU32 instructions associated, enable them (-mattr=+alu32) in LLVM code-gen could let the generated eBPF sequences carry more 32-bit information which could potentially easy flow analyser. This will be briefly discussed in the talk as well.
Pragmatic Optimization in Modern Programming - Mastering Compiler OptimizationsMarina Kolpakova
Explains compilers optimizations, gives taxanomy and examples. The examples are mostly compiler for ARM armv7-a and armv8-a targets, but most of optimizations are machine independent.
Pragmatic Optimization in Modern Programming - Ordering Optimization ApproachesMarina Kolpakova
The slides give an idea about how to look pragmatically at software optimization and order optimization approaches according to this pragmatic point of view
This talk will shed some light into the intermediate language that is used inside the Hex-Rays Decompiler. The microcode is simple yet powerful to represent real world programs. We publish it and give programmatic access to it from C++.
Multiplatform JIT Code Generator for NetBSD by Alexander Nasonoveurobsdcon
Abstract
The next release of NetBSD will have a support for Just-In-Time (JIT) compilation of bpf programs in the kernel; this change will greatly speed-up traffic sniffing on multiple platforms. Unlike similar interface in other operating systems, bpfjit uses a unified programming interface for code generation which is based on Stack Less JIT Compiler library (SLJIT) and which supports x86, mips, arm, sparc and some other platforms.
The speaker will give an overview of SLJIT API and discuss some implementation details of the bpfjit code with emphasis on supported optimizations of bpf programs by JIT engine. He will also touch on unit testing of dynamically generated code running inside the kernel and on other areas in the NetBSD project where bpfjit can help in boosting performance."
Speaker bio
Alex is a software developer working in the financial sector in the City of London. He often amuses fellow tube passengers with C or Lua coding in NetBSD console and sometimes even with the green kernel debugger prompt.
Input Output programming in AVR microcontrollerRobo India
Robo India in this presentation presents the Input and Output programming in AVR Micro Controllers namely Atmega 16, Atmega 8, Atmega 328, Atmega 32 etc.
As in robotics, automation and embedded system Input and Output programming is essential. This presentation describes how to use input and output ports, resisters of AVR microcontroller.
If you have any query please write us, we are found at-
website:http://roboindia.com
mail: info@roboindia.com
How Triton can help to reverse virtual machine based software protectionsJonathan Salwan
The first part of the talk is going to be an introduction to the Triton framework to expose its components and to explain how they work together. Then, the second part will include demonstrations on how it's possible to reverse virtual machine based protections using taint analysis, symbolic execution, SMT simplifications and LLVM-IR optimizations.
Un decálogo ético reducido a cinco pautas. Es parte de una sesión impartida el jueves 26 en Vegadeo, Asturias, en el curso dirigido por Miguel Presno, Universidad de Oviedo. 2007
This talk will shed some light into the intermediate language that is used inside the Hex-Rays Decompiler. The microcode is simple yet powerful to represent real world programs. We publish it and give programmatic access to it from C++.
Multiplatform JIT Code Generator for NetBSD by Alexander Nasonoveurobsdcon
Abstract
The next release of NetBSD will have a support for Just-In-Time (JIT) compilation of bpf programs in the kernel; this change will greatly speed-up traffic sniffing on multiple platforms. Unlike similar interface in other operating systems, bpfjit uses a unified programming interface for code generation which is based on Stack Less JIT Compiler library (SLJIT) and which supports x86, mips, arm, sparc and some other platforms.
The speaker will give an overview of SLJIT API and discuss some implementation details of the bpfjit code with emphasis on supported optimizations of bpf programs by JIT engine. He will also touch on unit testing of dynamically generated code running inside the kernel and on other areas in the NetBSD project where bpfjit can help in boosting performance."
Speaker bio
Alex is a software developer working in the financial sector in the City of London. He often amuses fellow tube passengers with C or Lua coding in NetBSD console and sometimes even with the green kernel debugger prompt.
Input Output programming in AVR microcontrollerRobo India
Robo India in this presentation presents the Input and Output programming in AVR Micro Controllers namely Atmega 16, Atmega 8, Atmega 328, Atmega 32 etc.
As in robotics, automation and embedded system Input and Output programming is essential. This presentation describes how to use input and output ports, resisters of AVR microcontroller.
If you have any query please write us, we are found at-
website:http://roboindia.com
mail: info@roboindia.com
How Triton can help to reverse virtual machine based software protectionsJonathan Salwan
The first part of the talk is going to be an introduction to the Triton framework to expose its components and to explain how they work together. Then, the second part will include demonstrations on how it's possible to reverse virtual machine based protections using taint analysis, symbolic execution, SMT simplifications and LLVM-IR optimizations.
Un decálogo ético reducido a cinco pautas. Es parte de una sesión impartida el jueves 26 en Vegadeo, Asturias, en el curso dirigido por Miguel Presno, Universidad de Oviedo. 2007
This slide deck focuses on eBPF JIT compilation infrastructure and how it plays an important role in the entire eBPF life cycle inside the Linux kernel. First, it does quite a number of control flow checks to reject vulnerable programs and then JIT compiles the eBPF program to either host or offloading target instructions which boost performance. However, there is little documentation about this topic which this slide deck will dive into.
Since the emerging of the OpenStack cloud computing platform in the Ubuntu community, increasing number of public/private cloud service providers choose to deploy it all over the world. Recently, Spectre and Meltdown have caused a panic in the world and the Spectre V2 is the only one which can attack the host system from the guest VM. It's vital to know the detailed process of the attack. Gavin Guo will give a detail explanation and an example of how to attack the host system. Besides, v1/v3/v4 are also introduced in the slide.
Analysis of Haiku Operating System (BeOS Family) by PVS-Studio. Part 2PVS-Studio
This is the second and last part of the large article about analysis of the Haiku operating system. In the first article, we discussed a variety of possible errors all of which one way or another deal with conditions. In this article, we will discuss the remaining analyzer warnings I have selected for you. The bug examples are grouped into several categories.
Introduction in Security given by Bart Van Bos at Nalys.
Topics:
- Buffer overflows in C
- Counter measures
- Life demo of 2 attacks
- Shellcode generation
Encryption in Microsoft 365 - ExpertsLive Netherlands 2024Albert Hoitingh
In this session I delve into the encryption technology used in Microsoft 365 and Microsoft Purview. Including the concepts of Customer Key and Double Key Encryption.
Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
Are you looking to streamline your workflows and boost your projects’ efficiency? Do you find yourself searching for ways to add flexibility and control over your FME workflows? If so, you’re in the right place.
Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
Neuro-symbolic is not enough, we need neuro-*semantic*Frank van Harmelen
Neuro-symbolic (NeSy) AI is on the rise. However, simply machine learning on just any symbolic structure is not sufficient to really harvest the gains of NeSy. These will only be gained when the symbolic structures have an actual semantics. I give an operational definition of semantics as “predictable inference”.
All of this illustrated with link prediction over knowledge graphs, but the argument is general.
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Connector Corner: Automate dynamic content and events by pushing a buttonDianaGray10
Here is something new! In our next Connector Corner webinar, we will demonstrate how you can use a single workflow to:
Create a campaign using Mailchimp with merge tags/fields
Send an interactive Slack channel message (using buttons)
Have the message received by managers and peers along with a test email for review
But there’s more:
In a second workflow supporting the same use case, you’ll see:
Your campaign sent to target colleagues for approval
If the “Approve” button is clicked, a Jira/Zendesk ticket is created for the marketing design team
But—if the “Reject” button is pushed, colleagues will be alerted via Slack message
Join us to learn more about this new, human-in-the-loop capability, brought to you by Integration Service connectors.
And...
Speakers:
Akshay Agnihotri, Product Manager
Charlie Greenberg, Host
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
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