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Full Discussion: C. To segmentation fault or not to segmentation fault, that is the question.
Top Forums Programming C. To segmentation fault or not to segmentation fault, that is the question. Post 303032353 by nezabudka on Friday 15th of March 2019 02:03:48 PM
Old 03-15-2019
I understood correctly?
On a 64-bit system without parameters, the code gives "Segmentation fault".
Is there no " Segmentation fault" on the 32-bit system when started without parameters?

If my assumptions are correct, when creating a stack in the "main" function of the 64-bit system, a layer in the form of a red zone from the previous stack is filled with machine zeros and the parameters get no value, which leads to segmentation. And when creating a frame in the 32-bit system of this red zone is not! And the garbage from the old frame gets into the parameters and therefore there is no segmentation. But this is still not correct.

P.S. Thanks "Auto Save Recovery" accidentally closed the tab.

--- Post updated at 21:03 ---

I apologize this line should be read like this
Quote:
Is there no " Segmentation fault" on the 32-bit system when started without parameters?
There is no " Segmentation fault" on the 32-bit system when started without parameters
Last edited by nezabudka; 03-15-2019 at 02:54 PM..
 

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LEARN ABOUT ULTRIX

pfm_enable_faults

pfm_enable_faults(3ncs) 												   pfm_enable_faults(3ncs)

Name
       pfm_enable_faults - enable asynchronous faults

Syntax
       #include <idl/c/base.h>
       #include <idl/c/pfm.h>

       void pfm_$enable_faults()

Description
       The routine enables asynchronous faults after they have been inhibited by a call to causes the operating system to pass asynchronous faults
       on to the calling process.

       While faults are inhibited, the operating system holds at most one asynchronous fault.  Consequently, when returns, there can  be  at  most
       one  fault waiting on the process.  If more than one fault was received between routines to and the process receives the first asynchronous
       fault received while faults were inhibited.

Diagnostics
       This section lists the status codes for errors returned by this routine.

       pfm_$bad_rls_order  Attempted to release a clean-up handler out of order.

       pfm_$cleanup_not_found
			   There is no pending clean-up handler.

       pfm_$cleanup_set    A clean-up handler was established successfully.

       pfm_$cleanup_set_signalled
			   Attempted to use pfm_$cleanup_set as a signal.

       pfm_$invalid_cleanup_rec
			   Passed an invalid clean-up record to a routine.

       pfm_$no_space	   Cannot allocate storage for a clean-up handler.

Files
See Also
       intro(3ncs), pfm_enable(3ncs), pfm_inhibit_faults(3ncs)

															   pfm_enable_faults(3ncs)
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