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Top Forums Programming Why does this example C code run and yet SHOULD either not compile or give a segmentation fault? Post 303033009 by Corona688 on Thursday 28th of March 2019 11:15:36 AM
Old 03-28-2019
Quote:
Originally Posted by wisecracker
7 ./cross_function_jump is obviously wrong but I have successfully got 'argv[0]'.
Because argv[0] actually exists, even in a program with no arguments - it's the name of the calling program.
Quote:
I don't care what is happening but compiling AND running without a segmentation fault is is not a fault of the programmer but of the compiler.
Again, why should it segfault? What exact fault should it be catching here? Segmentation fault means "touched memory I don't have permission to use", and if you don't do that, you don't get a segfault, even if you leap around like a flea on a hot griddle.
 

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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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