Debug printf source code with GDB on Ubuntu

By default, the library function does not contain debugging information in Ubuntu, so gdb cannot be used to enter the printf () function. Solution: 1. install libc: sudoapt-getinstalllibc6-dbg2 with debugging information. download libc source code. select a directory to place the source code and enter, such as/home/kent/dev-OS/libc6-sourceb. perform sudoapt-getsourcelibc6,

By default, the library function does not contain debugging information in Ubuntu, so gdb cannot be used to enter the printf () function.

Solution:

1. install the libc: sudo apt-get install libc6-dbg with debugging information

2. Download the libc source code

A. Select a directory to place the source code and enter, such as/home/kent/dev-OS/libc6-source

B. Execute sudo apt-get source libc6 and download the source code to the current directory. The last source directory is probably:/home/kent/dev-OS/libc6-source/eglibc-2.15

3. Specify the libc source code directory when running gdb: gdb 'Find/home/kent/dev-OS/libc6-source/eglibc-2.15-type d-printf'-d % P' my_program

4. Enter the printf () function. The first line of code I see here is

Va_list arg;

For more information about Ubuntu, see Ubuntu special page http://www.linuxidc.com/topicnews.aspx? Tid = 2