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which performs sanity checks on the released memory slices.
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Invalid slice adresses or slice sizes will be reported and lead to
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This option should only be used in debugging scenarios, because it
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significantly degrades GSlice performance. Extra per slice memory
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is requied to do the necessary bookeeping, and multi-thread scalability
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is given up to perform global slice validation.
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This option is mostly useful in scenarios where program crashes are encountered
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while GSlice is in use, but crashes cannot be reproduced with G_SLICE=always-malloc.
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A potential cause for such a situation that will be caught by G_SLICE=debug-blocks
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This option is for debugging scenarios.
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In particular, client packages sporting their own test suite should
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<emphasis>always enable this option when running tests</emphasis>.
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Global slice validation is ensured by storing size and address information
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for each allocated chunk, and maintaining a global hash table of that data.
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That way, multi-thread scalability is given up, and memory consumption is
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increased. However, the resulting code usually performs acceptably well,
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possibly better than with comparable memory checking carried out using
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external tools. An example of a memory corruption scenario that cannot be
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reproduced with <literal>G_SLICE=always-malloc</literal>, but will be caught
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by <literal>G_SLICE=debug-blocks</literal> is as follows:
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void *slist = g_slist_alloc(); /* void* gives up type-safety */
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g_list_free (slist); /* corruption: sizeof (GSList) != sizeof (GList) */
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<formalpara id="G_WIN32_PRETEND_WIN9X">
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<title><envar>G_WIN32_PRETEND_WIN9X</envar></title>
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Setting this variable to any value forces g_win32_get_windows_version()
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to return a version code for Windows 9x. This is mainly an internal
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debugging aid for GTK+ and GLib developers, to be able to check the
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code paths for Windows 9x.
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<refsect2 id="setlocale">
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On the other hand, there is the C library's current locale. The
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character set (code-page) used by that is not necessarily the same as
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the system default ANSI code-page. Strings in this character set are
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returned by functions like <function>strftime</function>.
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returned by functions like <function>strftime()</function>.
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docs/reference/glib/running.sgml
