[[!meta copyright="Copyright © 2009, 2012 Free Software Foundation, Inc."]] [[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable id="license" text="Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled [[GNU Free Documentation License|/fdl]]."]]"""]] [[!meta title="glibc: ptrace"]] [[!tag open_issue_glibc]] `ptrace` has some issues (`sysdeps/mach/hurd/ptrace.c`). * Our implementation (and the generic one in `misc/ptrace.c`) differ from the Linux one (`sysdeps/unix/sysv/linux/ptrace.c`) w.r.t. handling of... * the third argument: `int data` vs. `void *data`; * `void *addr2` -- Linux doesn't have this, but we provide some additional functionalty using this; * function declaration: Linux has **`long`** `int ptrace (enum __ptrace_request __request, ...)` **`__THROW`**, we have `int ptrace (enum __ptrace_request __request, ...)`; * interface do differ, e.g., Linux' `PTRACE_GETREGS` uses `void *data`, we use `void *addr` for returning the struct, and in Linux this is a `struct user_regs_struct` from `linux/user.h`, and for us it is a `struct i386_thread_state` from `mach/i386/thread_status.h`; * Linux provides some functionality that we don't provide: `PTRACE_GETFPXREGS` , `PTRACE_SINGLESTEP`. * Some parts are wrongly implemented, e.g., `PTRACE_GETREGS` and `PTRACE_SETREGS` both do the same thing. Also consider the `sysdeps/generic/sys/ptrace.h` and `sysdeps/unix/sysv/linux/sys/ptrace.h` files.