|
|
|
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
|
|
|
|
|
|
|
|
|
|
<!--Converted with LaTeX2HTML 2018 (Released Feb 1, 2018) -->
|
|
|
|
|
<HTML>
|
|
|
|
|
<HEAD>
|
|
|
|
|
<TITLE>Error handling</TITLE>
|
|
|
|
|
<META NAME="description" CONTENT="Error handling">
|
|
|
|
|
<META NAME="keywords" CONTENT="userhtml">
|
|
|
|
|
<META NAME="resource-type" CONTENT="document">
|
|
|
|
|
<META NAME="distribution" CONTENT="global">
|
|
|
|
|
|
|
|
|
|
<META NAME="Generator" CONTENT="LaTeX2HTML v2018">
|
|
|
|
|
<META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css">
|
|
|
|
|
|
|
|
|
|
<LINK REL="STYLESHEET" HREF="userhtml.css">
|
|
|
|
|
|
|
|
|
|
<LINK REL="next" HREF="node118.html">
|
|
|
|
|
<LINK REL="previous" HREF="node99.html">
|
|
|
|
|
<LINK REL="up" HREF="userhtml.html">
|
|
|
|
|
<LINK REL="next" HREF="node118.html">
|
|
|
|
|
</HEAD>
|
|
|
|
|
|
|
|
|
|
<BODY >
|
|
|
|
|
|
|
|
|
|
<DIV CLASS="navigation"><!--Navigation Panel-->
|
|
|
|
|
<A NAME="tex2html1719"
|
|
|
|
|
HREF="node118.html">
|
|
|
|
|
<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A>
|
|
|
|
|
<A NAME="tex2html1715"
|
|
|
|
|
HREF="userhtml.html">
|
|
|
|
|
<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A>
|
|
|
|
|
<A NAME="tex2html1709"
|
|
|
|
|
HREF="node116.html">
|
|
|
|
|
<IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A>
|
|
|
|
|
<A NAME="tex2html1717"
|
|
|
|
|
HREF="node1.html">
|
|
|
|
|
<IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A>
|
|
|
|
|
<BR>
|
|
|
|
|
<B> Next:</B> <A NAME="tex2html1720"
|
|
|
|
|
HREF="node118.html">Utilities</A>
|
|
|
|
|
<B> Up:</B> <A NAME="tex2html1716"
|
|
|
|
|
HREF="userhtml.html">userhtml</A>
|
|
|
|
|
<B> Previous:</B> <A NAME="tex2html1710"
|
|
|
|
|
HREF="node116.html">psb_rcv Receive</A>
|
|
|
|
|
<B> <A NAME="tex2html1718"
|
|
|
|
|
HREF="node1.html">Contents</A></B>
|
|
|
|
|
<BR>
|
|
|
|
|
<BR></DIV>
|
|
|
|
|
<!--End of Navigation Panel-->
|
|
|
|
|
|
|
|
|
|
<H1><A NAME="SECTION00090000000000000000">
|
|
|
|
|
Error handling</A>
|
|
|
|
|
</H1>
|
|
|
|
|
|
|
|
|
|
<P>
|
|
|
|
|
The PSBLAS library error handling policy has been completely rewritten
|
|
|
|
|
in version 2.0. The idea behind the design of this new error handling
|
|
|
|
|
strategy is to keep error messages on a stack allowing the user to
|
|
|
|
|
trace back up to the point where the first error message has been
|
|
|
|
|
generated. Every routine in the PSBLAS-2.0 library has, as last
|
|
|
|
|
non-optional argument, an integer <code>info</code> variable; whenever,
|
|
|
|
|
inside the routine, an error is detected, this variable is set to a
|
|
|
|
|
value corresponding to a specific error code. Then this error code is
|
|
|
|
|
also pushed on the error stack and then either control is returned to
|
|
|
|
|
the caller routine or the execution is aborted, depending on the users
|
|
|
|
|
choice. At the time when the execution is aborted, an error message is
|
|
|
|
|
printed on standard output with a level of verbosity than can be
|
|
|
|
|
chosen by the user. If the execution is not aborted, then, the caller
|
|
|
|
|
routine checks the value returned in the <code>info</code> variable and, if
|
|
|
|
|
not zero, an error condition is raised. This process continues on all the
|
|
|
|
|
levels of nested calls until the level where the user decides to abort
|
|
|
|
|
the program execution.
|
|
|
|
|
|
|
|
|
|
<P>
|
|
|
|
|
Figure <A HREF="#fig:routerr">9</A> shows the layout of a generic <code>psb_foo</code>
|
|
|
|
|
routine with respect to the PSBLAS-2.0 error handling policy. It is
|
|
|
|
|
possible to see how, whenever an error condition is detected, the
|
|
|
|
|
<code>info</code> variable is set to the corresponding error code which is,
|
|
|
|
|
then, pushed on top of the stack by means of the
|
|
|
|
|
<code>psb_errpush</code>. An error condition may be directly detected inside
|
|
|
|
|
a routine or indirectly checking the error code returned returned by a
|
|
|
|
|
called routine. Whenever an error is encountered, after it has been
|
|
|
|
|
pushed on stack, the program execution skips to a point where the
|
|
|
|
|
error condition is handled; the error condition is handled either by
|
|
|
|
|
returning control to the caller routine or by calling the
|
|
|
|
|
<code>psb\_error</code> routine which prints the content of the error stack
|
|
|
|
|
and aborts the program execution, according to the choice made by the
|
|
|
|
|
user with <code>psb_set_erraction</code>. The default is to print the error
|
|
|
|
|
and terminate the program, but the user may choose to handle the error
|
|
|
|
|
explicitly.
|
|
|
|
|
|
|
|
|
|
<P>
|
|
|
|
|
|
|
|
|
|
<DIV ALIGN="CENTER"><A NAME="fig:routerr"></A><A NAME="7481"></A>
|
|
|
|
|
<TABLE>
|
|
|
|
|
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 9:</STRONG>
|
|
|
|
|
The layout of a generic <TT>psb_foo</TT>
|
|
|
|
|
routine with respect to PSBLAS-2.0 error handling policy.</CAPTION>
|
|
|
|
|
<TR><TD>
|
|
|
|
|
<BR>
|
|
|
|
|
|
|
|
|
|
<DIV ALIGN="CENTER">
|
|
|
|
|
<!-- MATH
|
|
|
|
|
$\fbox{\TheSbox}$
|
|
|
|
|
-->
|
|
|
|
|
<SPAN CLASS="MATH"><IMG
|
|
|
|
|
WIDTH="562" HEIGHT="482" ALIGN="MIDDLE" BORDER="0"
|
|
|
|
|
SRC="img153.png"
|
|
|
|
|
ALT="\fbox{\TheSbox}"></SPAN>
|
|
|
|
|
</DIV></TD></TR>
|
|
|
|
|
</TABLE>
|
|
|
|
|
</DIV>
|
|
|
|
|
|
|
|
|
|
<P>
|
|
|
|
|
Figure <A HREF="#fig:errormsg">10</A> reports a sample error message generated by
|
|
|
|
|
the PSBLAS-2.0 library. This error has been generated by the fact that
|
|
|
|
|
the user has chosen the invalid “FOO” storage format to represent
|
|
|
|
|
the sparse matrix. From this error message it is possible to see that
|
|
|
|
|
the error has been detected inside the <code>psb_cest</code> subroutine
|
|
|
|
|
called by <code>psb_spasb</code> ... by process 0 (i.e. the root process).
|
|
|
|
|
|
|
|
|
|
<P>
|
|
|
|
|
|
|
|
|
|
<DIV ALIGN="CENTER"><A NAME="fig:errormsg"></A><A NAME="7482"></A>
|
|
|
|
|
<TABLE>
|
|
|
|
|
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 10:</STRONG>
|
|
|
|
|
A sample PSBLAS-2.0 error
|
|
|
|
|
message. Process 0 detected an error condition inside the psb_cest subroutine</CAPTION>
|
|
|
|
|
<TR><TD>
|
|
|
|
|
<BR>
|
|
|
|
|
|
|
|
|
|
<DIV ALIGN="CENTER">
|
|
|
|
|
<!-- MATH
|
|
|
|
|
$\fbox{\TheSbox}$
|
|
|
|
|
-->
|
|
|
|
|
<SPAN CLASS="MATH"><IMG
|
|
|
|
|
WIDTH="562" HEIGHT="482" ALIGN="MIDDLE" BORDER="0"
|
|
|
|
|
SRC="img153.png"
|
|
|
|
|
ALT="\fbox{\TheSbox}"></SPAN>
|
|
|
|
|
</DIV></TD></TR>
|
|
|
|
|
</TABLE>
|
|
|
|
|
</DIV>
|
|
|
|
|
|
|
|
|
|
<P>
|
|
|
|
|
ifstarsubroutinesubroutinepsb_errpushPushes an error code onto the error
|
|
|
|
|
stack
|
|
|
|
|
|
|
|
|
|
<P>
|
|
|
|
|
<BR>
|
|
|
|
|
<IMG
|
|
|
|
|
WIDTH="423" HEIGHT="16" ALIGN="BOTTOM" BORDER="0"
|
|
|
|
|
SRC="img155.png"
|
|
|
|
|
ALT="\begin{lstlisting}
|
|
|
|
|
call psb_errpush(err_c, r_name, i_err, a_err)
|
|
|
|
|
\end{lstlisting}">
|
|
|
|
|
<BR>
|
|
|
|
|
|
|
|
|
|
<P>
|
|
|
|
|
<DL>
|
|
|
|
|
<DT><STRONG>Type:</STRONG></DT>
|
|
|
|
|
<DD>Asynchronous.
|
|
|
|
|
</DD>
|
|
|
|
|
<DT><STRONG><B>On Entry</B></STRONG></DT>
|
|
|
|
|
<DD>
|
|
|
|
|
</DD>
|
|
|
|
|
<DT><STRONG>err_c</STRONG></DT>
|
|
|
|
|
<DD>the error code
|
|
|
|
|
<BR>
|
|
|
|
|
Scope: <B>local</B>
|
|
|
|
|
<BR>
|
|
|
|
|
Type: <B>required</B>
|
|
|
|
|
<BR>
|
|
|
|
|
Intent: <B>in</B>.
|
|
|
|
|
<BR>
|
|
|
|
|
Specified as: an integer.
|
|
|
|
|
</DD>
|
|
|
|
|
<DT><STRONG>r_name</STRONG></DT>
|
|
|
|
|
<DD>the soutine where the error has been caught.
|
|
|
|
|
<BR>
|
|
|
|
|
Scope: <B>local</B>
|
|
|
|
|
<BR>
|
|
|
|
|
Type: <B>required</B>
|
|
|
|
|
<BR>
|
|
|
|
|
Intent: <B>in</B>.
|
|
|
|
|
<BR>
|
|
|
|
|
Specified as: a string.
|
|
|
|
|
<BR></DD>
|
|
|
|
|
<DT><STRONG>i_err</STRONG></DT>
|
|
|
|
|
<DD>addional info for error code
|
|
|
|
|
<BR>
|
|
|
|
|
Scope: <B>local</B>
|
|
|
|
|
<BR>
|
|
|
|
|
Type: <B>optional</B>
|
|
|
|
|
<BR>
|
|
|
|
|
Specified as: an integer array
|
|
|
|
|
<BR></DD>
|
|
|
|
|
<DT><STRONG>a_err</STRONG></DT>
|
|
|
|
|
<DD>addional info for error code
|
|
|
|
|
<BR>
|
|
|
|
|
Scope: <B>local</B>
|
|
|
|
|
<BR>
|
|
|
|
|
Type: <B>optional</B>
|
|
|
|
|
<BR>
|
|
|
|
|
Specified as: a string.
|
|
|
|
|
<BR></DD>
|
|
|
|
|
</DL>
|
|
|
|
|
|
|
|
|
|
<P>
|
|
|
|
|
ifstarsubroutinesubroutinepsb_errorPrints the error stack content and aborts
|
|
|
|
|
execution
|
|
|
|
|
|
|
|
|
|
<P>
|
|
|
|
|
<BR>
|
|
|
|
|
<IMG
|
|
|
|
|
WIDTH="213" HEIGHT="16" ALIGN="BOTTOM" BORDER="0"
|
|
|
|
|
SRC="img156.png"
|
|
|
|
|
ALT="\begin{lstlisting}
|
|
|
|
|
call psb_error(icontxt)
|
|
|
|
|
\end{lstlisting}">
|
|
|
|
|
<BR>
|
|
|
|
|
|
|
|
|
|
<P>
|
|
|
|
|
<DL>
|
|
|
|
|
<DT><STRONG>Type:</STRONG></DT>
|
|
|
|
|
<DD>Asynchronous.
|
|
|
|
|
</DD>
|
|
|
|
|
<DT><STRONG><B>On Entry</B></STRONG></DT>
|
|
|
|
|
<DD>
|
|
|
|
|
</DD>
|
|
|
|
|
<DT><STRONG>icontxt</STRONG></DT>
|
|
|
|
|
<DD>the communication context.
|
|
|
|
|
<BR>
|
|
|
|
|
Scope: <B>global</B>
|
|
|
|
|
<BR>
|
|
|
|
|
Type: <B>optional</B>
|
|
|
|
|
<BR>
|
|
|
|
|
Intent: <B>in</B>.
|
|
|
|
|
<BR>
|
|
|
|
|
Specified as: an integer.
|
|
|
|
|
</DD>
|
|
|
|
|
</DL>
|
|
|
|
|
|
|
|
|
|
<P>
|
|
|
|
|
ifstarsubroutinesubroutinepsb_set_errverbositySets the verbosity of error
|
|
|
|
|
messages.
|
|
|
|
|
|
|
|
|
|
<P>
|
|
|
|
|
<BR>
|
|
|
|
|
<IMG
|
|
|
|
|
WIDTH="261" HEIGHT="16" ALIGN="BOTTOM" BORDER="0"
|
|
|
|
|
SRC="img157.png"
|
|
|
|
|
ALT="\begin{lstlisting}
|
|
|
|
|
call psb_set_errverbosity(v)
|
|
|
|
|
\end{lstlisting}">
|
|
|
|
|
<BR>
|
|
|
|
|
|
|
|
|
|
<P>
|
|
|
|
|
<DL>
|
|
|
|
|
<DT><STRONG>Type:</STRONG></DT>
|
|
|
|
|
<DD>Asynchronous.
|
|
|
|
|
</DD>
|
|
|
|
|
<DT><STRONG><B>On Entry</B></STRONG></DT>
|
|
|
|
|
<DD>
|
|
|
|
|
</DD>
|
|
|
|
|
<DT><STRONG>v</STRONG></DT>
|
|
|
|
|
<DD>the verbosity level
|
|
|
|
|
<BR>
|
|
|
|
|
Scope: <B>global</B>
|
|
|
|
|
<BR>
|
|
|
|
|
Type: <B>required</B>
|
|
|
|
|
<BR>
|
|
|
|
|
Intent: <B>in</B>.
|
|
|
|
|
<BR>
|
|
|
|
|
Specified as: an integer.
|
|
|
|
|
</DD>
|
|
|
|
|
</DL>
|
|
|
|
|
|
|
|
|
|
<P>
|
|
|
|
|
ifstarsubroutinesubroutinepsb_set_erractionSet the type of action to be
|
|
|
|
|
taken upon error condition.
|
|
|
|
|
|
|
|
|
|
<P>
|
|
|
|
|
<BR>
|
|
|
|
|
<IMG
|
|
|
|
|
WIDTH="289" HEIGHT="16" ALIGN="BOTTOM" BORDER="0"
|
|
|
|
|
SRC="img158.png"
|
|
|
|
|
ALT="\begin{lstlisting}
|
|
|
|
|
call psb_set_erraction(err_act)
|
|
|
|
|
\end{lstlisting}">
|
|
|
|
|
<BR>
|
|
|
|
|
|
|
|
|
|
<P>
|
|
|
|
|
<DL>
|
|
|
|
|
<DT><STRONG>Type:</STRONG></DT>
|
|
|
|
|
<DD>Asynchronous.
|
|
|
|
|
</DD>
|
|
|
|
|
<DT><STRONG><B>On Entry</B></STRONG></DT>
|
|
|
|
|
<DD>
|
|
|
|
|
</DD>
|
|
|
|
|
<DT><STRONG>err_act</STRONG></DT>
|
|
|
|
|
<DD>the type of action.
|
|
|
|
|
<BR>
|
|
|
|
|
Scope: <B>global</B>
|
|
|
|
|
<BR>
|
|
|
|
|
Type: <B>required</B>
|
|
|
|
|
<BR>
|
|
|
|
|
Intent: <B>in</B>.
|
|
|
|
|
<BR>
|
|
|
|
|
Specified as: an integer. Possible values: <code>psb_act_ret</code>,
|
|
|
|
|
<code>psb_act_abort</code>.
|
|
|
|
|
</DD>
|
|
|
|
|
</DL>
|
|
|
|
|
|
|
|
|
|
<P>
|
|
|
|
|
|
|
|
|
|
<DIV CLASS="navigation"><HR>
|
|
|
|
|
<!--Navigation Panel-->
|
|
|
|
|
<A NAME="tex2html1719"
|
|
|
|
|
HREF="node118.html">
|
|
|
|
|
<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A>
|
|
|
|
|
<A NAME="tex2html1715"
|
|
|
|
|
HREF="userhtml.html">
|
|
|
|
|
<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A>
|
|
|
|
|
<A NAME="tex2html1709"
|
|
|
|
|
HREF="node116.html">
|
|
|
|
|
<IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A>
|
|
|
|
|
<A NAME="tex2html1717"
|
|
|
|
|
HREF="node1.html">
|
|
|
|
|
<IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A>
|
|
|
|
|
<BR>
|
|
|
|
|
<B> Next:</B> <A NAME="tex2html1720"
|
|
|
|
|
HREF="node118.html">Utilities</A>
|
|
|
|
|
<B> Up:</B> <A NAME="tex2html1716"
|
|
|
|
|
HREF="userhtml.html">userhtml</A>
|
|
|
|
|
<B> Previous:</B> <A NAME="tex2html1710"
|
|
|
|
|
HREF="node116.html">psb_rcv Receive</A>
|
|
|
|
|
<B> <A NAME="tex2html1718"
|
|
|
|
|
HREF="node1.html">Contents</A></B> </DIV>
|
|
|
|
|
<!--End of Navigation Panel-->
|
|
|
|
|
|
|
|
|
|
</BODY>
|
|
|
|
|
</HTML>
|
