-Warray-bounds option to GCC compiler


 
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# 15  
Old 02-22-2018
Quote:
Originally Posted by hicksd8
No, I don't think so. I'm still scratching my head like you and the others.

Some web pages indicate that it works, others say that it doesn't.
You have to be careful with those different web pages. They are not necessarily accurate.
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GET_THREAD_AREA(2)					     Linux Programmer's Manual						GET_THREAD_AREA(2)

NAME
get_thread_area - Get a Thread Local Storage (TLS) area SYNOPSIS
#include <linux/unistd.h> #include <asm/ldt.h> int get_thread_area(struct user_desc *u_info); DESCRIPTION
get_thread_area() returns an entry in the current thread's Thread Local Storage (TLS) array. The index of the entry corresponds to the value of u_info->entry_number, passed in by the user. If the value is in bounds, get_thread_area() copies the corresponding TLS entry into the area pointed to by u_info. RETURN VALUE
get_thread_area() returns 0 on success. Otherwise, it returns -1 and sets errno appropriately. ERRORS
EFAULT u_info is an invalid pointer. EINVAL u_info->entry_number is out of bounds. VERSIONS
A version of get_thread_area() first appeared in Linux 2.5.32. CONFORMING TO
get_thread_area() is Linux-specific and should not be used in programs that are intended to be portable. NOTES
Glibc does not provide a wrapper for this system call; call it using syscall(2). SEE ALSO
modify_ldt(2), set_thread_area(2) COLOPHON
This page is part of release 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. Linux 2008-11-27 GET_THREAD_AREA(2)