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https://github.com/mozilla/gecko-dev.git
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[not part of build] added GC_mark_object, added verbose parameter to GC_trace_object to limit sheer volume of data generated, massive removal of hard tabs.
This commit is contained in:
beard%netscape.com
parent
21567a7d55
commit
c256497045
@ -17,30 +17,30 @@
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void GC_default_print_heap_obj_proc();
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GC_API void GC_register_finalizer_no_order
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GC_PROTO((GC_PTR obj, GC_finalization_proc fn, GC_PTR cd,
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GC_finalization_proc *ofn, GC_PTR *ocd));
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GC_PROTO((GC_PTR obj, GC_finalization_proc fn, GC_PTR cd,
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GC_finalization_proc *ofn, GC_PTR *ocd));
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/* Do we want to and know how to save the call stack at the time of */
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/* an allocation? How much space do we want to use in each object? */
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/* Do we want to and know how to save the call stack at the time of */
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/* an allocation? How much space do we want to use in each object? */
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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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/* 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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char * oh_string; /* object descriptor string */
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word oh_int; /* object descriptor integers */
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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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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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/* 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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#undef ROUNDED_UP_WORDS
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@ -60,9 +60,9 @@ typedef struct {
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# endif
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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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/* 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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ptr_t p;
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{
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@ -75,8 +75,8 @@ ptr_t p;
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return(FALSE);
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}
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if (ohdr -> oh_sz == sz) {
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/* Object may have had debug info, but has been deallocated */
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return(FALSE);
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/* Object may have had debug info, but has been deallocated */
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return(FALSE);
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}
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if (ohdr -> oh_sf == (START_FLAG ^ (word)body)) return(TRUE);
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if (((word *)ohdr)[BYTES_TO_WORDS(sz)-1] == (END_FLAG ^ (word)body)) {
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@ -86,10 +86,10 @@ ptr_t p;
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}
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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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/* 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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register ptr_t p; /* base pointer */
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word sz; /* bytes */
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register ptr_t p; /* base pointer */
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word sz; /* bytes */
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char * string;
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word integer;
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{
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@ -97,9 +97,9 @@ word integer;
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register word * result = (word *)(ohdr + 1);
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DCL_LOCK_STATE;
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/* There is some argument that we should dissble signals here. */
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/* But that's expensive. And this way things should only appear */
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/* inconsistent while we're in the handler. */
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/* There is some argument that we should dissble signals here. */
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/* But that's expensive. And this way things should only appear */
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/* inconsistent while we're in the handler. */
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LOCK();
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ohdr -> oh_string = string;
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ohdr -> oh_int = integer;
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@ -111,9 +111,9 @@ word integer;
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return((ptr_t)result);
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}
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/* Check the object with debugging info at p */
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/* return NIL if it's OK. Else return clobbered */
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/* address. */
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/* Check the object with debugging info at p */
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/* return NIL if it's OK. Else return clobbered */
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/* address. */
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ptr_t GC_check_annotated_obj(ohdr)
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register oh * ohdr;
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{
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@ -159,62 +159,76 @@ ptr_t p;
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#define NEXT_OBJECT(ohdr) (*(oh**)&ohdr->oh_ci[1].ci_pc)
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#define IS_PLAUSIBLE_POINTER(p) ((p >= GC_least_plausible_heap_addr) && (p < GC_greatest_plausible_heap_addr))
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void GC_mark_object(ptr_t p, word mark)
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{
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p = GC_base(p);
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if (p && GC_has_debug_info(p)) {
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oh *ohdr = (oh *)p;
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NEXT_WORD(ohdr) = mark;
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}
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}
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/**
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* Note: this can be made completely iterative, using the mark
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* field as a link to the next object to be scanned.
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* Starting from specified object, traces through the entire graph of reachable objects.
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* Uses extra word stored in debugging header for alignment purposes.
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*/
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void GC_trace_object(ptr_t p)
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void GC_trace_object(ptr_t p, int verbose)
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{
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register oh *head, *scan, *tail;
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register word *wp, *wend;
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word total = 0;
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DCL_LOCK_STATE;
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DISABLE_SIGNALS();
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LOCK();
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STOP_WORLD();
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head = scan = tail = (oh *)GC_base(p);
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if (head) {
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/* invariant: end of list always marked with value 1. */
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NEXT_WORD(tail) = 1;
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for (;;) {
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wp = (word*)((unsigned long)scan + sizeof(oh));
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p = GC_base(p);
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if (p && GC_has_debug_info(p)) {
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head = scan = tail = (oh *)p;
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GC_err_printf3("\n0x%08lX <%s> (%ld)\n", wp, getTypeName(wp),
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(unsigned long)(scan->oh_sz));
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/* invariant: end of list always marked with value 1. */
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NEXT_WORD(tail) = 1;
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/* trace through every object reachable from this starting point. */
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for (;;) {
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/* print ADDRESS <type> (size) for each object. */
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wp = (word*)((unsigned long)scan + sizeof(oh));
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GC_err_printf3("0x%08lX <%s> (%ld)\n", wp, getTypeName(wp), scan->oh_sz);
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total += scan->oh_sz;
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/* print all potential references held by this object. */
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wend = (word*)((unsigned long)wp + scan->oh_sz);
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while (wp < wend) {
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p = (ptr_t) *wp++;
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GC_err_printf1("\t0x%08lX\n", p);
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if (IS_PLAUSIBLE_POINTER(p)) {
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oh* header = (oh *)GC_base(p);
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if (header && GC_has_debug_info(header)) {
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if(NEXT_WORD(header) == 0) {
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NEXT_OBJECT(tail) = header;
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tail = header;
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/* scan/print all plausible references held by this object. */
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wend = (word*)((word)wp + scan->oh_sz);
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while (wp < wend) {
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p = (ptr_t) *wp++;
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if (verbose) GC_err_printf1("\t0x%08lX\n", p);
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if (IS_PLAUSIBLE_POINTER(p)) {
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p = GC_base(p);
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if (p && GC_has_debug_info(p)) {
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oh *ohdr = (oh *)p;
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if (NEXT_WORD(ohdr) == 0) {
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NEXT_OBJECT(tail) = ohdr;
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tail = ohdr;
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NEXT_WORD(tail) = 1;
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}
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}
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}
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}
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PRINT_CALL_CHAIN(scan);
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if (NEXT_WORD(scan) == 1)
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break;
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scan = NEXT_OBJECT(scan);
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}
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}
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if (verbose) PRINT_CALL_CHAIN(scan);
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if (NEXT_WORD(scan) == 1)
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break;
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scan = NEXT_OBJECT(scan);
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}
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GC_printf1("GC_trace_object: total = %ld\n", total);
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/* clear all marks. */
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scan = head;
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NEXT_WORD(tail) = 0;
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while (scan) {
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tail = NEXT_OBJECT(scan);
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NEXT_WORD(scan) = 0;
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scan = tail;
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}
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/* clear all marks. */
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scan = head;
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NEXT_WORD(tail) = 0;
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while (scan) {
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tail = NEXT_OBJECT(scan);
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NEXT_WORD(scan) = 0;
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scan = tail;
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}
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}
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START_WORLD();
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@ -226,9 +240,9 @@ void GC_debug_print_heap_obj_proc(p)
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ptr_t p;
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{
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if (GC_has_debug_info(p)) {
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GC_print_obj(p);
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GC_print_obj(p);
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} else {
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GC_default_print_heap_obj_proc(p);
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GC_default_print_heap_obj_proc(p);
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}
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}
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@ -238,11 +252,11 @@ ptr_t p, clobbered_addr;
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register oh * ohdr = (oh *)GC_base(p);
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GC_err_printf2("0x%lx in object at 0x%lx(", (unsigned long)clobbered_addr,
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(unsigned long)p);
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(unsigned long)p);
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if (clobbered_addr <= (ptr_t)(&(ohdr -> oh_sz))
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|| ohdr -> oh_string == 0) {
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GC_err_printf1("<smashed>, appr. sz = %ld)\n",
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(GC_size((ptr_t)ohdr) - DEBUG_BYTES));
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(GC_size((ptr_t)ohdr) - DEBUG_BYTES));
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} else {
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if (ohdr -> oh_string[0] == '\0') {
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GC_err_puts("EMPTY(smashed?)");
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@ -250,7 +264,7 @@ ptr_t p, clobbered_addr;
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GC_err_puts(ohdr -> oh_string);
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}
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GC_err_printf2(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int),
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(unsigned long)(ohdr -> oh_sz));
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(unsigned long)(ohdr -> oh_sz));
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PRINT_CALL_CHAIN(ohdr);
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}
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}
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@ -292,7 +306,7 @@ void GC_start_debugging()
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char * s;
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int i;
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# ifdef GC_ADD_CALLER
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--> GC_ADD_CALLER not implemented for K&R C
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--> GC_ADD_CALLER not implemented for K&R C
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# endif
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# endif
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{
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@ -300,13 +314,13 @@ void GC_start_debugging()
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if (result == 0) {
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GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
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(unsigned long) lb);
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(unsigned long) lb);
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GC_err_puts(s);
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GC_err_printf1(":%ld)\n", (unsigned long)i);
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return(0);
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}
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if (!GC_debugging_started) {
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GC_start_debugging();
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GC_start_debugging();
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}
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ADD_CALL_CHAIN(result, ra);
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return (GC_store_debug_info(result, (word)lb, s, (word)i));
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@ -326,13 +340,13 @@ void GC_start_debugging()
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if (result == 0) {
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GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
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(unsigned long) lb);
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(unsigned long) lb);
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GC_err_puts(s);
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GC_err_printf1(":%ld)\n", (unsigned long)i);
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return(0);
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}
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if (!GC_debugging_started) {
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GC_start_debugging();
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GC_start_debugging();
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}
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ADD_CALL_CHAIN(result, ra);
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return (GC_store_debug_info(result, (word)lb, s, (word)i));
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@ -346,13 +360,13 @@ GC_PTR p;
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if (q == 0) {
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GC_err_printf1("Bad argument: 0x%lx to GC_debug_change_stubborn\n",
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(unsigned long) p);
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(unsigned long) p);
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ABORT("GC_debug_change_stubborn: bad arg");
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}
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hhdr = HDR(q);
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if (hhdr -> hb_obj_kind != STUBBORN) {
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GC_err_printf1("GC_debug_change_stubborn arg not stubborn: 0x%lx\n",
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(unsigned long) p);
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(unsigned long) p);
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ABORT("GC_debug_change_stubborn: arg not stubborn");
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}
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GC_change_stubborn(q);
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@ -366,13 +380,13 @@ GC_PTR p;
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if (q == 0) {
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GC_err_printf1("Bad argument: 0x%lx to GC_debug_end_stubborn_change\n",
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(unsigned long) p);
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(unsigned long) p);
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ABORT("GC_debug_end_stubborn_change: bad arg");
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}
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hhdr = HDR(q);
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if (hhdr -> hb_obj_kind != STUBBORN) {
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GC_err_printf1("debug_end_stubborn_change arg not stubborn: 0x%lx\n",
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(unsigned long) p);
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(unsigned long) p);
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ABORT("GC_debug_end_stubborn_change: arg not stubborn");
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}
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GC_end_stubborn_change(q);
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@ -393,7 +407,7 @@ GC_PTR p;
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if (result == 0) {
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GC_err_printf1("GC_debug_malloc_atomic(%ld) returning NIL (",
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(unsigned long) lb);
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(unsigned long) lb);
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GC_err_puts(s);
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GC_err_printf1(":%ld)\n", (unsigned long)i);
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return(0);
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@ -418,7 +432,7 @@ GC_PTR p;
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if (result == 0) {
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GC_err_printf1("GC_debug_malloc_uncollectable(%ld) returning NIL (",
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(unsigned long) lb);
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(unsigned long) lb);
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GC_err_puts(s);
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GC_err_printf1(":%ld)\n", (unsigned long)i);
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return(0);
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@ -444,7 +458,7 @@ GC_PTR p;
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if (result == 0) {
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GC_err_printf1(
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"GC_debug_malloc_atomic_uncollectable(%ld) returning NIL (",
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"GC_debug_malloc_atomic_uncollectable(%ld) returning NIL (",
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(unsigned long) lb);
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GC_err_puts(s);
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GC_err_printf1(":%ld)\n", (unsigned long)i);
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@ -474,13 +488,13 @@ GC_PTR p;
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if (base == 0) {
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GC_err_printf1("Attempt to free invalid pointer %lx\n",
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(unsigned long)p);
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(unsigned long)p);
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if (p != 0) ABORT("free(invalid pointer)");
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}
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if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
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GC_err_printf1(
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"GC_debug_free called on pointer %lx wo debugging info\n",
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(unsigned long)p);
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"GC_debug_free called on pointer %lx wo debugging info\n",
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(unsigned long)p);
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} else {
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oh * ohdr = (oh *)base;
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clobbered = GC_check_annotated_obj(ohdr);
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@ -499,20 +513,20 @@ GC_PTR p;
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# ifdef FIND_LEAK
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GC_free(base);
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# else
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{
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register hdr * hhdr = HDR(p);
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GC_bool uncollectable = FALSE;
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{
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register hdr * hhdr = HDR(p);
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GC_bool uncollectable = FALSE;
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if (hhdr -> hb_obj_kind == UNCOLLECTABLE) {
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uncollectable = TRUE;
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}
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# ifdef ATOMIC_UNCOLLECTABLE
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if (hhdr -> hb_obj_kind == AUNCOLLECTABLE) {
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uncollectable = TRUE;
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}
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# endif
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if (uncollectable) GC_free(base);
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}
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if (hhdr -> hb_obj_kind == UNCOLLECTABLE) {
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uncollectable = TRUE;
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}
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# ifdef ATOMIC_UNCOLLECTABLE
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if (hhdr -> hb_obj_kind == AUNCOLLECTABLE) {
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uncollectable = TRUE;
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}
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# endif
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if (uncollectable) GC_free(base);
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}
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# endif
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}
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@ -541,8 +555,8 @@ GC_PTR p;
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}
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if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
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GC_err_printf1(
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"GC_debug_realloc called on pointer %lx wo debugging info\n",
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(unsigned long)p);
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"GC_debug_realloc called on pointer %lx wo debugging info\n",
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(unsigned long)p);
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return(GC_realloc(p, lb));
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}
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hhdr = HDR(base);
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@ -559,12 +573,12 @@ GC_PTR p;
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result = GC_debug_malloc_atomic(lb, OPT_RA s, i);
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break;
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case UNCOLLECTABLE:
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result = GC_debug_malloc_uncollectable(lb, OPT_RA s, i);
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break;
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result = GC_debug_malloc_uncollectable(lb, OPT_RA s, i);
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break;
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# ifdef ATOMIC_UNCOLLECTABLE
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case AUNCOLLECTABLE:
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result = GC_debug_malloc_atomic_uncollectable(lb, OPT_RA s, i);
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break;
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result = GC_debug_malloc_atomic_uncollectable(lb, OPT_RA s, i);
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break;
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# endif
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default:
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GC_err_printf0("GC_debug_realloc: encountered bad kind\n");
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@ -586,7 +600,7 @@ GC_PTR p;
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/* Check all marked objects in the given block for validity */
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/*ARGSUSED*/
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void GC_check_heap_block(hbp, dummy)
|
||||
register struct hblk *hbp; /* ptr to current heap block */
|
||||
register struct hblk *hbp; /* ptr to current heap block */
|
||||
word dummy;
|
||||
{
|
||||
register struct hblkhdr * hhdr = HDR(hbp);
|
||||
@ -597,36 +611,36 @@ word dummy;
|
||||
p = (word *)(hbp->hb_body);
|
||||
word_no = HDR_WORDS;
|
||||
if (sz > MAXOBJSZ) {
|
||||
plim = p;
|
||||
plim = p;
|
||||
} else {
|
||||
plim = (word *)((((word)hbp) + HBLKSIZE) - WORDS_TO_BYTES(sz));
|
||||
plim = (word *)((((word)hbp) + HBLKSIZE) - WORDS_TO_BYTES(sz));
|
||||
}
|
||||
/* go through all words in block */
|
||||
while( p <= plim ) {
|
||||
if( mark_bit_from_hdr(hhdr, word_no)
|
||||
&& GC_has_debug_info((ptr_t)p)) {
|
||||
ptr_t clobbered = GC_check_annotated_obj((oh *)p);
|
||||
|
||||
if (clobbered != 0) {
|
||||
GC_err_printf0(
|
||||
"GC_check_heap_block: found smashed object at ");
|
||||
GC_print_smashed_obj((ptr_t)p, clobbered);
|
||||
}
|
||||
}
|
||||
word_no += sz;
|
||||
p += sz;
|
||||
}
|
||||
while( p <= plim ) {
|
||||
if( mark_bit_from_hdr(hhdr, word_no)
|
||||
&& GC_has_debug_info((ptr_t)p)) {
|
||||
ptr_t clobbered = GC_check_annotated_obj((oh *)p);
|
||||
|
||||
if (clobbered != 0) {
|
||||
GC_err_printf0(
|
||||
"GC_check_heap_block: found smashed object at ");
|
||||
GC_print_smashed_obj((ptr_t)p, clobbered);
|
||||
}
|
||||
}
|
||||
word_no += sz;
|
||||
p += sz;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/* This assumes that all accessible objects are marked, and that */
|
||||
/* I hold the allocation lock. Normally called by collector. */
|
||||
/* This assumes that all accessible objects are marked, and that */
|
||||
/* I hold the allocation lock. Normally called by collector. */
|
||||
void GC_check_heap_proc()
|
||||
{
|
||||
# ifndef SMALL_CONFIG
|
||||
if (sizeof(oh) & (2 * sizeof(word) - 1) != 0) {
|
||||
ABORT("Alignment problem: object header has inappropriate size\n");
|
||||
}
|
||||
if (sizeof(oh) & (2 * sizeof(word) - 1) != 0) {
|
||||
ABORT("Alignment problem: object header has inappropriate size\n");
|
||||
}
|
||||
# endif
|
||||
GC_apply_to_all_blocks(GC_check_heap_block, (word)0);
|
||||
}
|
||||
@ -645,7 +659,7 @@ struct closure {
|
||||
# endif
|
||||
{
|
||||
struct closure * result =
|
||||
(struct closure *) GC_malloc(sizeof (struct closure));
|
||||
(struct closure *) GC_malloc(sizeof (struct closure));
|
||||
|
||||
result -> cl_fn = fn;
|
||||
result -> cl_data = data;
|
||||
@ -668,8 +682,8 @@ struct closure {
|
||||
|
||||
# ifdef __STDC__
|
||||
void GC_debug_register_finalizer(GC_PTR obj, GC_finalization_proc fn,
|
||||
GC_PTR cd, GC_finalization_proc *ofn,
|
||||
GC_PTR *ocd)
|
||||
GC_PTR cd, GC_finalization_proc *ofn,
|
||||
GC_PTR *ocd)
|
||||
# else
|
||||
void GC_debug_register_finalizer(obj, fn, cd, ofn, ocd)
|
||||
GC_PTR obj;
|
||||
@ -682,21 +696,21 @@ struct closure {
|
||||
ptr_t base = GC_base(obj);
|
||||
if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
|
||||
GC_err_printf1(
|
||||
"GC_register_finalizer called with non-base-pointer 0x%lx\n",
|
||||
obj);
|
||||
"GC_register_finalizer called with non-base-pointer 0x%lx\n",
|
||||
obj);
|
||||
}
|
||||
GC_register_finalizer(base, GC_debug_invoke_finalizer,
|
||||
GC_make_closure(fn,cd), ofn, ocd);
|
||||
GC_make_closure(fn,cd), ofn, ocd);
|
||||
}
|
||||
|
||||
# ifdef __STDC__
|
||||
void GC_debug_register_finalizer_no_order
|
||||
(GC_PTR obj, GC_finalization_proc fn,
|
||||
GC_PTR cd, GC_finalization_proc *ofn,
|
||||
GC_PTR *ocd)
|
||||
(GC_PTR obj, GC_finalization_proc fn,
|
||||
GC_PTR cd, GC_finalization_proc *ofn,
|
||||
GC_PTR *ocd)
|
||||
# else
|
||||
void GC_debug_register_finalizer_no_order
|
||||
(obj, fn, cd, ofn, ocd)
|
||||
(obj, fn, cd, ofn, ocd)
|
||||
GC_PTR obj;
|
||||
GC_finalization_proc fn;
|
||||
GC_PTR cd;
|
||||
@ -707,21 +721,21 @@ struct closure {
|
||||
ptr_t base = GC_base(obj);
|
||||
if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
|
||||
GC_err_printf1(
|
||||
"GC_register_finalizer_no_order called with non-base-pointer 0x%lx\n",
|
||||
obj);
|
||||
"GC_register_finalizer_no_order called with non-base-pointer 0x%lx\n",
|
||||
obj);
|
||||
}
|
||||
GC_register_finalizer_no_order(base, GC_debug_invoke_finalizer,
|
||||
GC_make_closure(fn,cd), ofn, ocd);
|
||||
GC_make_closure(fn,cd), ofn, ocd);
|
||||
}
|
||||
|
||||
# ifdef __STDC__
|
||||
void GC_debug_register_finalizer_ignore_self
|
||||
(GC_PTR obj, GC_finalization_proc fn,
|
||||
GC_PTR cd, GC_finalization_proc *ofn,
|
||||
GC_PTR *ocd)
|
||||
(GC_PTR obj, GC_finalization_proc fn,
|
||||
GC_PTR cd, GC_finalization_proc *ofn,
|
||||
GC_PTR *ocd)
|
||||
# else
|
||||
void GC_debug_register_finalizer_ignore_self
|
||||
(obj, fn, cd, ofn, ocd)
|
||||
(obj, fn, cd, ofn, ocd)
|
||||
GC_PTR obj;
|
||||
GC_finalization_proc fn;
|
||||
GC_PTR cd;
|
||||
@ -732,9 +746,9 @@ struct closure {
|
||||
ptr_t base = GC_base(obj);
|
||||
if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
|
||||
GC_err_printf1(
|
||||
"GC_register_finalizer_ignore_self called with non-base-pointer 0x%lx\n",
|
||||
obj);
|
||||
"GC_register_finalizer_ignore_self called with non-base-pointer 0x%lx\n",
|
||||
obj);
|
||||
}
|
||||
GC_register_finalizer_ignore_self(base, GC_debug_invoke_finalizer,
|
||||
GC_make_closure(fn,cd), ofn, ocd);
|
||||
GC_make_closure(fn,cd), ofn, ocd);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user