-2018-2019-1 20165206 "Information Security system Design Fundamentals" 3rd week Study summary-Textbook learning content Summary
Program code: The GCC command invokes a complete set of programs to convert the source code into an executable file.First, the C preprocessor expands the source code;Second, the comp
48916.3.4 process contains how many steps 49016.3.5 need to control and monitor 4911 6.3.6 when to redefine a project objective 49216.4 law Field 49216.4.1 Royce Methodology 49316.4.2 Extreme Programming (XP) 49616.4.3 Rugby methodology 50016.5 Case study 50516.5.1 XP project: ATRAC T 50616.5.2 Local main customer: FRIEND 50816.5.3 Distributed project: JAMES 51316.5.4 Case Study summary 51816.6 recommended readings 52116.7 Exercise 521 Part 4 Appendix Appendix A design Pattern 525a.1 Abstrac T
in C and Python environments 63915.9 using Swig to wrap C code 64015.10 using Cython to wrap C code 64615.11 using Cython to efficiently manipulate arrays 65215.12 Converting a function pointer to a callable object 65715.13 passing null-terminated strings to C library 65915.14 passing Unicode strings to C library 66315.15 converting C strings to Python 66715.16 dealing with a C string with an indeterminate encoding method 66915.17 passing the file name to the C extension Module 67215.18 passing
at the California Institute of Technology. Professor Knuth has received many awards and honors, including the American Computer Association Turing Award (ACM Turing Award), the Scientific Gold Award by former President Jimmy Carter (Medal of Science), the American Mathematical Society Steele Award (AMS Steele Prize), And the highly acclaimed Kyoto Award (Kyoto Prize), which was awarded in November 1996 for the invention of advanced technology. Professor Knuth now lives in Stanford campus with h
selectionAnti-color textWebsiteTips for designing a Web pageRepeatReadabilityPart Two font design9 fonts (with life)CoordinateConflictContrastSummary10 Font CategoriesOldstyleModernSlab serifSans serifScriptMake a conscious effort to doQuiz # # #: Font categoriesQuiz # #: Coarse/Fine transitionsQuiz # #: Cut LineSummary11 Font ComparisonSizeThicknessStructureShapeDirectionColorCombine multiple comparisonsSummaryQuiz: Contrast or conflictQuiz # # #: Can do and not doCombining a variety of contra
Language 1441.3.3. Applications to permutations 1641.4. Some fundamental programming Techniques 1801.4.1. Subroutines 1801.4.2. Coroutines 1931.4.3. Interpretive Routines 2001.4.3.1. A NIX Simulator 202"18.104.22.168. Trace Routines 2121.4.4. Input and Output 2151.4.5. History and Bibliography 229Chapter 2 Information Structures 2322.1. Introduction 2322.2. Linear Lists 2382.2.1. Stacks, Queues, and Deques 2382.2.2. Sequential Allocation 2442.2.3. Linked A
STRACE: Prints the trajectory of each system call that is being called by a running program and its child processes. Right
PS: Lists the processes in the current system (including zombie processes)
TOP: Prints out information about the current process resource usage.
PMAP: Displays the memory mappings for the process. Proc: A virtual file system that outputs the contents of a large number of kernel data str
more specific, but it's not quite understandable how the cache works, because there's some abstraction.This week's code hostingCode Link: https://git.oschina.net/929210354/LinuxLearning progress Bar
lines of code (new /Cumulative)
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Installing a Lin
the representation and processing of the information in the 2nd Chapter(i), three kinds of important digital representationsUnsigned number: The encoding is based on the traditional binary notation (numbers greater than or equal to zero).Complement: Encoding is the most common way to represent signed integers (numbers that are positive or negative).Floating-point number: The encoding is a two-base version of the scientific notation for real numbers.Al
its address, and the collection of all possible addresses is called the virtual address space.2.how the compiler and runtime systems divide the memory space into more manageable units to hold different program objects (program object), that is, procedural data, directives, and control information. the value of a pointer in C (whether it is pointing to an integer, a struct, or some other program object) is
20165214 2018-2017-1 "Information Security system Design Fundamentals" The third week study summary of learning Contents1. In fact, the GCC command invokes a series of programs that convert the source code into executable code.2, the actual realization of the memory system is to combine multiple hardware memory and operating system software.3. ISA: Instruction se
Int→float will not overflow but may be roundedInt/float→double results retain exact valuesDouble→float may overflow to ±∞ and may be rounded due to small accuracyThe float/double→int rounds to 0 and can overflow.Problems encountered:1. Error in compiling the 28-page code in the bookCheck the code seems to be nothing wrong, do not know why ... at last, I commented out the line . The source code is as follows2. Exercise 2.52 do not understand, I hope the teacher can explain in classI
2018-2019-1 20165228 "Fundamentals of Information Security system design" the third week of learning summary of the Learning Content Summary program machine-level representation: Two important abstractions of computer systems
ISA (Instruction set architecture): Instruction set architecture, machine-level progr
20145311 "Information Security system Design Fundamentals" The sixth Week study summary textbook Learning content SummaryThe tables in the book are still very important.
A program is compiled to run on one machine and cannot be run on another machineRegister%ESP are stack pointers, stack, call, and return instructionsProgram Counter PC holds the address of th
Floating-point arithmeticIEEE floating point representation: v= ( -1) s x M x 2E (sign S, Mantissa M, order E)Round to even (default): Rounds a number up or down, and the least significant number of results is even. Can be used in binary decimals.Rounds to 0: rounds the integer down, and the negative number rounds up.Round down: Both positive and negative numbers are rounded down.Round up: Both positive and negative numbers are rounded up.Code hosting other (sentiment, thinking, etc., opti
specified as a double word, the size of the block is the integer multiple of the double word, not the rounding to Yes.Explicit idle linked list
Difference（1）分配时间 隐式的，分配时间是块总数的线性时间 但是显式的，是空闲块数量的线性时间。（2）链表形式 隐式——隐式空闲链表 显式——双向链表，有前驱和后继，比头部脚部好使
Sorting policy:?后进先出?按照地址顺序维护Detached List of idle links
Separating storage is a popular way to reduce allocation time. The general idea is to divide all possible block sizes into equivalent class/size classes
The allocator maintains an a
The typical errors are:scanf("%d",val);
(2) Read uninitialized memory
Although the bass memory location is always initialized to 0 by the loader, it is not the case for heap storage.
A common mistake is to assume that the heap memory is initialized to 0.
(3) Allow stack buffer overflow
If a program writes to the target buffer in the stack without checking the size of the input string, the program will have a buffer overflow error.
(4) Assume t
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