lumiera_/tests/tool/vgsuppression.c
Ichthyostega 806db414dd Copyright: clarify and simplify the file headers
* Lumiera source code always was copyrighted by individual contributors
 * there is no entity "Lumiera.org" which holds any copyrights
 * Lumiera source code is provided under the GPL Version 2+

== Explanations ==
Lumiera as a whole is distributed under Copyleft, GNU General Public License Version 2 or above.
For this to become legally effective, the ''File COPYING in the root directory is sufficient.''

The licensing header in each file is not strictly necessary, yet considered good practice;
attaching a licence notice increases the likeliness that this information is retained
in case someone extracts individual code files. However, it is not by the presence of some
text, that legally binding licensing terms become effective; rather the fact matters that a
given piece of code was provably copyrighted and published under a license. Even reformatting
the code, renaming some variables or deleting parts of the code will not alter this legal
situation, but rather creates a derivative work, which is likewise covered by the GPL!

The most relevant information in the file header is the notice regarding the
time of the first individual copyright claim. By virtue of this initial copyright,
the first author is entitled to choose the terms of licensing. All further
modifications are permitted and covered by the License. The specific wording
or format of the copyright header is not legally relevant, as long as the
intention to publish under the GPL remains clear. The extended wording was
based on a recommendation by the FSF. It can be shortened, because the full terms
of the license are provided alongside the distribution, in the file COPYING.
2024-11-17 23:42:55 +01:00

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/*
vgsuppression.c - Helper program to generate valgrind suppression files
Copyright (C)
2008, Christian Thaeter <ct@pipapo.org>
  **Lumiera** is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License as published by the
  Free Software Foundation; either version 2 of the License, or (at your
  option) any later version. See the file COPYING for further details.
*/
/** @file vgsuppression.c
** dummy executable to generate _valgrind suppressions_.
** When running code under `valgrind` to detect memory leaks, typically a well known set
** of false alarms will be reported. The reason is that some facilities, either implemented
** by our own or from third party libraries, just choose never to free some working buffers.
** To deal with this well known issue, `valgrind` allows to be "primed" with a specifically
** crafted executable, which deliberately triggers just these false memory leak alarms.
*/
/*
just place any problematic calls where valgrind whines about in main (with comments please)
*/
#include "lib/tmpbuf.h"
#include <stdint.h>
typedef const char* lumiera_err;
struct lumiera_errorcontext_struct;
struct lumiera_errorcontext_struct*
lumiera_error_get (void);
lumiera_err
lumiera_error_set (lumiera_err, const char*);
lumiera_err
lumiera_error (void);
int
main ()
{
/* debian etch glibc is lazy about cleaning up TLS */
lumiera_tmpbuf_provide (100);
lumiera_tmpbuf_freeall ();
/* tempbufs aren't freed by design */
lumiera_tmpbuf_snprintf (SIZE_MAX, "everyone loves c-strings");
/* lumiera_error_get() mallocs a LumieraErrorcontext for each thread */
lumiera_error_get();
lumiera_error_set("dummy","dummy");
lumiera_error();
return 0;
}