103 lines
3.4 KiB
C
103 lines
3.4 KiB
C
/*
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* Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
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* Copyright (c) 1991-1995 by Xerox Corporation. All rights reserved.
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* Copyright (c) 1997 by Silicon Graphics. All rights reserved.
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* Copyright (c) 1999 by Hewlett-Packard Company. All rights reserved.
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*
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* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
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* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
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*
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* Permission is hereby granted to use or copy this program
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* for any purpose, provided the above notices are retained on all copies.
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* Permission to modify the code and to distribute modified code is granted,
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* provided the above notices are retained, and a notice that the code was
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* modified is included with the above copyright notice.
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*/
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/*
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* This is mostly an internal header file. Typical clients should
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* not use it. Clients that define their own object kinds with
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* debugging allocators will probably want to include this, however.
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* No attempt is made to keep the namespace clean. This should not be
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* included from header filrd that are frequently included by clients.
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*/
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#ifndef _DBG_MLC_H
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#define _DBG_MLC_H
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# define I_HIDE_POINTERS
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# include "gc_priv.h"
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# ifdef KEEP_BACK_PTRS
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# include "backptr.h"
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# endif
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# define START_FLAG ((word)0xfedcedcb)
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# define END_FLAG ((word)0xbcdecdef)
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/* Stored both one past the end of user object, and one before */
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/* the end of the object as seen by the allocator. */
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/* Object header */
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typedef struct {
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# ifdef KEEP_BACK_PTRS
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ptr_t oh_back_ptr;
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# define MARKED_FOR_FINALIZATION (ptr_t)(-1)
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/* Object was marked because it is finalizable. */
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# define MARKED_FROM_REGISTER (ptr_t)(-2)
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/* Object was marked from a rgister. Hence the */
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/* source of the reference doesn't have an address. */
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# ifdef ALIGN_DOUBLE
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word oh_dummy;
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# endif
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# endif
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char * oh_string; /* object descriptor string */
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word oh_int; /* object descriptor integers */
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# ifdef NEED_CALLINFO
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struct callinfo oh_ci[NFRAMES];
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# endif
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word oh_sz; /* Original malloc arg. */
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word oh_sf; /* start flag */
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} oh;
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/* The size of the above structure is assumed not to dealign things, */
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/* and to be a multiple of the word length. */
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#define DEBUG_BYTES (sizeof (oh) + sizeof (word))
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#define USR_PTR_FROM_BASE(p) ((ptr_t)(p) + sizeof(oh))
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/* There is no reason to ever add a byte at the end explicitly, since we */
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/* already add a guard word. */
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#undef ROUNDED_UP_WORDS
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#define ROUNDED_UP_WORDS(n) BYTES_TO_WORDS((n) + WORDS_TO_BYTES(1) - 1)
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#ifdef SAVE_CALL_CHAIN
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# define ADD_CALL_CHAIN(base, ra) GC_save_callers(((oh *)(base)) -> oh_ci)
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# define PRINT_CALL_CHAIN(base) GC_print_callers(((oh *)(base)) -> oh_ci)
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#else
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# ifdef GC_ADD_CALLER
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# define ADD_CALL_CHAIN(base, ra) ((oh *)(base)) -> oh_ci[0].ci_pc = (ra)
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# define PRINT_CALL_CHAIN(base) GC_print_callers(((oh *)(base)) -> oh_ci)
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# else
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# define ADD_CALL_CHAIN(base, ra)
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# define PRINT_CALL_CHAIN(base)
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# endif
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#endif
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# ifdef GC_ADD_CALLER
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# define OPT_RA ra,
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# else
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# define OPT_RA
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# endif
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/* Check whether object with base pointer p has debugging info */
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/* p is assumed to point to a legitimate object in our part */
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/* of the heap. */
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GC_bool GC_has_debug_info(/* p */);
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/* Store debugging info into p. Return displaced pointer. */
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/* Assumes we don't hold allocation lock. */
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ptr_t GC_store_debug_info(/* p, sz, string, integer */);
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#endif /* _DBG_MLC_H */
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