so") – open and get a handle to the library • dlsym(handle, "symbol_name") – get addresses to entities • dlclose(handle) – close symbol table handle – may unload the library; varies across implementations Static linking app editor.o file.o line.o search.o source.o23 CppCon 2021 | Static linking static libraries app editor.o file.o line.o search.o source.o libed.a editor.o file.o line.o libre a search.o24 CppCon 2021 | Dynamic linking app libed.so => libre.so => source.o libed.so editor.o file.o line.o libre.so search.o25 CppCon 2021 | • Decompose an application’s material for shipping

(DLL), Dynamic Shared Library • Binary: • Executable / Shared Library , Component, Module • Symbol: • Function / Global variable • “Linux”: • Unix-like systems • Mostly MacOS too (1 important distinction DLL Name • ImportLookupTable offset • ImportAddressTable offset • … Import Lookup Table* Imported symbol names/ordinals, for loader usage … … … Import Address Table (IAT) List of import addresses names and symbol names 13lib1, lib2 f1, f2, f3, g1,g2,g3 … code data .dynamic .dynsim … code data .idata lib1: f1, f2, f3 lib2: g1, g2, g3 14Interposition • Overriding a symbol in one binary

ecosystem Extensions we’ll cover today:Code Faster with Performance Improvements • 3.6x faster symbol search + new fuzzy search • 1.5x faster time to IntelliSense + progressive IntelliSense • 2-3x time [Insiders] https://aka.ms/cpp/perfCode Faster with Performance Improvements • 3.6x faster symbol search + new fuzzy search • 1.5x faster time to IntelliSense + progressive IntelliSense • 2-3x time [Insiders] https://aka.ms/cpp/perfCode Faster with Performance Improvements • 3.6x faster symbol search + new fuzzy search • 1.5x faster time to IntelliSense + progressive IntelliSense • 2-3x

Indentation in Makefile is a tab instead of a space character. If you copy this code directly into your editor, the tab may be automatically replaced. Please ensure the indentation in the Makefile is done by the rvalue. lvalue, left value, as the name implies, is the value to the left of the assignment symbol. To be precise, an lvalue is a persistent object that still exists after an expression (not necessarily regular expression and is also the core matching syntax of a regular expression. See the table below: Symbol Description $ Matches the end position of the input string. (,) Marks the start and end of a

Dan Saks About Ben Saks Ben Saks is the chief engineer of Saks & Associates. He is the principal editor and presenter for much of Saks & Associates’ training curriculum on the use of C and C++ in embedded it stores that name and its attributes in a symbol table.  When the compiler encounters a reference to a name, it looks up the name in the symbol table to find those attributes. class widget {

todayVisual Studio Code Session coming up! #1 most used code editor [StackOverflow Developer Surveys] Free, open source code editor Runs on Windows, macOS, and Linux C++ IntelliSense, debugging, Cross-platform development 4. Developer and Team ProductivityBuild Time Improvements • 16.6 • Optimized symbol lookup. • ~2X better time to enter break state while debugging. • Up to 4X better in single-step

8Lambda Expressions ● Operator Overloading ○ any method which starts with “operator” followed by a symbol, are called overloaded operators ■ bool operator==(const T &value) ■ bool operator>(const T &value) KitchenSink ○ contains 30 demos and links with almost every CopperSpice library ● Diamond ○ programmers editor which uses the CopperSpice libraries ● DoxyPress & DoxyPressApp ○ application for generating source

连这些基础都不清楚的人，不能要求自己冒冒然就开始用Visual C++、用MFC、用对象 导向的方式去设计一个你根本就不懂其运作原理的程序。 还没学会走之前，不要跑！ Dialog Editor Image Editor Font Editor .DLG .BMP .BMP .ICO .ICO .CUR .CUR .FON .FON .RC .H .C RC Compiler LINKER C Compiler lib(thrdcore.obj) : error LNK2001: unresolved external symbol __endthreadex nafxcw.lib(thrdcore.obj) : error LNK2001: unresolved external symbol __beginthreadex mfccon.exe : fatal error LNK1120: 2 unresolved 编译器会自动为你合成一个。 说这么多，总结就是，经过所谓的data slicing，本例的mydoc 真正变成了一个完完全全 86 error LNK2001: unresolved external symbol "private: static double SavingAccount::m_rate"(?m_rate@SavingAccount@@2HA) 叫出来，修改m_rate 的值，就花掉不少时间。m_rate

enable_apacheconnector: False enable_cppparser: False enable_crypto: True enable_data: True ... The @ symbol at the end of the package name is important to search for a specific package. If you don’t add the openjpeg/2.3.1@bincrafters/stable openssl/1.0.2s ... As you can see, some of the libraries end with a @ symbol followed by two strings separated by a slash. These fields are the user and channel for the Conan different as the option value is encapsulated inside a Python class. • Explicit comparisons with the == symbol are case sensitive, so: – self.options.option = "False" satisfies assert self.options.option ==

enable_apacheconnector: False enable_cppparser: False enable_crypto: True enable_data: True ... The @ symbol at the end of the package name is important to search for a specific package. If you don’t add the openjpeg/2.3.1@bincrafters/stable openssl/1.0.2s ... As you can see, some of the libraries end with a @ symbol followed by two strings separated by a slash. These fields are the user and channel for the Conan different as the option value is encapsulated inside a Conan class. • Explicit comparisons with the == symbol are case sensitive, so: – self.options.option = "False" satisfies assert self.options.option ==