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A debug symbol is a special kind of symbol that attaches additional information to the symbol table of an object file, such as a shared library or an executable.This information allows a symbolic debugger to gain access to information from the source code of the binary, such as the names of identifiers, including variables and routines.
Using the GCC compiler on Linux, the code above must be compiled using the -g flag in order to include appropriate debug information on the binary generated, thus making it possible to inspect it using GDB. Assuming that the file containing the code above is named example.c, the command for the compilation could be: $
"current": AC (for "alternating current"); less commonly, DC (for "direct current"); or even I (the symbol used in physics and electronics) Roman numerals: for example the word "six" in the clue might be used to indicate the letters VI; The name of a chemical element may be used to signify its symbol; e.g., W for tungsten
The .debug_info section of an ELF contains information generated by compilers to describe the source code while debugging by keeping symbols and its type, scope, file, line number, etc. The .debug_info [1] section is one of the main components of DWARF [2] [3] debug info files. [4] This is generated by a compiler when -g switch or its variants ...
GCC is a key component of the GNU toolchain which is used for most projects related to GNU and the Linux kernel. With roughly 15 million lines of code in 2019, GCC is one of the largest free programs in existence. [4] It has played an important role in the growth of free software, as both a tool and an example.
The minimum information contained in a symbol table used by a translator and intermediate representation (IR) includes the symbol's name and its location or address. For a compiler targeting a platform with a concept of relocatability, it will also contain relocatability attributes (absolute, relocatable, etc.) and needed relocation information for relocatable symbols.
A PDB file is typically created from source files during compilation. It stores a list of all symbols in a module with their addresses and possibly the name of the file and the line on which the symbol was declared. This symbol information is not stored in the module itself, because it takes up a lot of space. [citation needed]
Such information can also be used by other software tools. The information must be generated by the compiler and stored in the executable file or dynamic library by the linker. Some object file formats include debugging information, but others can use generic debugging data formats such as stabs and DWARF.