2016-05-06 Basile Starynkevitch <basile@starynkevitch.net>

	{{very unstable; I had an heisenbug... -code crashing with ASLR,
	but nearly working without; The commit on 2016-05-03 commented as
	more stable as GCC5 plugin; but perhaps wrong with
	generate_runtypesupport_forwcopy_fun handle the unlikely case of
	young discriminant same as current object... etc is perhaps
	incorrect}}
	* melt-runtime.h: Add long comment about MELT_HAVE_DEBUG vs
	MELT_HAVE_RUNTIME_DEBUG and melt_flag_debug. Use more
	systematically MELT_HAVE_RUNTIME_DEBUG...
	(MELT_ENTERFRAME_AT): Test melt_flag_debug. The buffer for
	location is always needed.
	(MELT_TOUCHED_CACHE_SIZE): Raised slightly.
	(meltgc_touch): Introduce the touchgapwords constant.

	* melt-runtime.cc: Use more systematically
	MELT_HAVE_RUNTIME_DEBUG...

	(Melt_Module::Melt_Module): Copy dlerror() to some static buffer
	before showing it.
	(melt_compile_source, meltgc_readsexpr)
	(meltgc_readmacrostringsequence, meltgc_readval)
	(meltgc_read_from_rawstring, meltgc_read_from_val): Always have a
	curlocbuf..
	(meltgc_run_cc_extension): Copy dlerror() to some static buffer
	before showing it.
	(meltgc_start_module_by_index,meltgc_load_flavored_module)
	(meltgc_start_flavored_module, meltgc_load_one_module)
	(meltgc_load_module_list, meltgc_load_modules_and_do_mode): Always
	have some locbuf.
	(melt_really_initialize): Copy dlerror() to some static buffer.
	(melt_fatal_info): call melt_dbgshortbacktrace on runtime or
	flagged debugging.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/melt-branch@236035 138bc75d-0d04-0410-961f-82ee72b054a4

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