![]() ![]() If ptrace() fails with -1 then it’s really likely that you’re running into GDB since ptrace() failed because your code is already being debugged using ptrace() :P. ![]() With this in mind you can just use a simple function that will try to ptrace() your code. When it debugs a binary it uses exec* family system call first, and when attaching to an already running process it uses ptrace() directly. ![]() IDLE will make you save your program first and then your code output will appear in the other (interactive) window. type your print statement a couple times on separate lines. You called me Inferior 1 (process 11391) exited with code 017 We did it The program printed, 'You called me', which means we successfully ran randomfunction( ) Exit code 017 means the process didnt exit cleanly, but that is to be expected. Another window opens that you can write longer programs in.GDB as you most likely already know is just a nice front end to ptrace(2). (gdb) jump randomfunction Continuing at 0x40056a. For 1, the answer is obvious: you need a file to debug. the file does exist, is a dynamically linked executable, and the ELF interpreter that it specifies does not exist. Right now, I’m listening to Sepultura’s Bestial Devastation and thinking about an interesting post not related to any public bugs, so here is the most common anti-debugging method for the GNU Debugger ( aka. There are two common causes of this: the file /usr/local/sbin/test doesn't exist.
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