=================================================================== RCS file: /home/cvs/OpenXM_contrib2/asir2000/gc/alloc.c,v retrieving revision 1.1 retrieving revision 1.4 diff -u -p -r1.1 -r1.4 --- OpenXM_contrib2/asir2000/gc/alloc.c 1999/12/03 07:39:09 1.1 +++ OpenXM_contrib2/asir2000/gc/alloc.c 2001/04/20 07:39:18 1.4 @@ -1,7 +1,8 @@ /* * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers - * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved. + * Copyright (c) 1991-1996 by Xerox Corporation. All rights reserved. * Copyright (c) 1998 by Silicon Graphics. All rights reserved. + * Copyright (c) 1999 by Hewlett-Packard Company. All rights reserved. * * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED * OR IMPLIED. ANY USE IS AT YOUR OWN RISK. @@ -15,10 +16,10 @@ */ -# include "gc_priv.h" +# include "private/gc_priv.h" # include -# ifndef MACOS +# if !defined(MACOS) && !defined(MSWINCE) # include # include # endif @@ -61,16 +62,25 @@ word GC_non_gc_bytes = 0; /* Number of bytes not inte word GC_gc_no = 0; #ifndef SMALL_CONFIG - int GC_incremental = 0; /* By default, stop the world. */ + int GC_incremental = 0; /* By default, stop the world. */ #endif -int GC_full_freq = 4; /* Every 5th collection is a full */ - /* collection. */ +int GC_parallel = FALSE; /* By default, parallel GC is off. */ +int GC_full_freq = 19; /* Every 20th collection is a full */ + /* collection, whether we need it */ + /* or not. */ + +GC_bool GC_need_full_gc = FALSE; + /* Need full GC do to heap growth. */ + +word GC_used_heap_size_after_full = 0; + char * GC_copyright[] = {"Copyright 1988,1989 Hans-J. Boehm and Alan J. Demers ", "Copyright (c) 1991-1995 by Xerox Corporation. All rights reserved. ", "Copyright (c) 1996-1998 by Silicon Graphics. All rights reserved. ", +"Copyright (c) 1999-2000 by Hewlett-Packard Company. All rights reserved. ", "THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY", " EXPRESSED OR IMPLIED. ANY USE IS AT YOUR OWN RISK.", "See source code for details." }; @@ -111,10 +121,12 @@ int GC_n_attempts = 0; /* Number of attempts at finis GET_TIME(current_time); time_diff = MS_TIME_DIFF(current_time,GC_start_time); if (time_diff >= TIME_LIMIT) { -# ifdef PRINTSTATS +# ifdef CONDPRINT + if (GC_print_stats) { GC_printf0("Abandoning stopped marking after "); GC_printf1("%lu msecs", (unsigned long)time_diff); GC_printf1("(attempt %d)\n", (unsigned long) GC_n_attempts); + } # endif return(1); } @@ -213,13 +225,16 @@ GC_bool GC_should_collect() return(GC_adj_words_allocd() >= min_words_allocd()); } + void GC_notify_full_gc() { - if (GC_start_call_back != (void (*)())0) { + if (GC_start_call_back != (void (*) GC_PROTO((void)))0) { (*GC_start_call_back)(); } } +GC_bool GC_is_full_gc = FALSE; + /* * Initiate a garbage collection if appropriate. * Choose judiciously @@ -229,7 +244,6 @@ void GC_notify_full_gc() void GC_maybe_gc() { static int n_partial_gcs = 0; - GC_bool is_full_gc = FALSE; if (GC_should_collect()) { if (!GC_incremental) { @@ -237,19 +251,24 @@ void GC_maybe_gc() GC_gcollect_inner(); n_partial_gcs = 0; return; - } else if (n_partial_gcs >= GC_full_freq) { -# ifdef PRINTSTATS - GC_printf2( - "***>Full mark for collection %lu after %ld allocd bytes\n", - (unsigned long) GC_gc_no+1, - (long)WORDS_TO_BYTES(GC_words_allocd)); + } else if (GC_need_full_gc || n_partial_gcs >= GC_full_freq) { +# ifdef CONDPRINT + if (GC_print_stats) { + GC_printf2( + "***>Full mark for collection %lu after %ld allocd bytes\n", + (unsigned long) GC_gc_no+1, + (long)WORDS_TO_BYTES(GC_words_allocd)); + } # endif GC_promote_black_lists(); +# ifdef PARALLEL_MARK + GC_wait_for_reclaim(); +# endif (void)GC_reclaim_all((GC_stop_func)0, TRUE); GC_clear_marks(); n_partial_gcs = 0; GC_notify_full_gc(); - is_full_gc = TRUE; + GC_is_full_gc = TRUE; } else { n_partial_gcs++; } @@ -263,7 +282,7 @@ void GC_maybe_gc() # endif GC_finish_collection(); } else { - if (!is_full_gc) { + if (!GC_is_full_gc) { /* Count this as the first attempt */ GC_n_attempts++; } @@ -280,27 +299,36 @@ GC_bool GC_try_to_collect_inner(stop_func) GC_stop_func stop_func; { if (GC_incremental && GC_collection_in_progress()) { -# ifdef PRINTSTATS +# ifdef CONDPRINT + if (GC_print_stats) { GC_printf0( "GC_try_to_collect_inner: finishing collection in progress\n"); -# endif /* PRINTSTATS */ + } +# endif /* CONDPRINT */ /* Just finish collection already in progress. */ while(GC_collection_in_progress()) { if (stop_func()) return(FALSE); GC_collect_a_little_inner(1); } } -# ifdef PRINTSTATS +# ifdef CONDPRINT + if (GC_print_stats) { GC_printf2( "Initiating full world-stop collection %lu after %ld allocd bytes\n", (unsigned long) GC_gc_no+1, (long)WORDS_TO_BYTES(GC_words_allocd)); + } # endif GC_promote_black_lists(); /* Make sure all blocks have been reclaimed, so sweep routines */ /* don't see cleared mark bits. */ /* If we're guaranteed to finish, then this is unnecessary. */ - if (stop_func != GC_never_stop_func + /* In the find_leak case, we have to finish to guarantee that */ + /* previously unmarked objects are not reported as leaks. */ +# ifdef PARALLEL_MARK + GC_wait_for_reclaim(); +# endif + if ((GC_find_leak || stop_func != GC_never_stop_func) && !GC_reclaim_all(stop_func, FALSE)) { /* Aborted. So far everything is still consistent. */ return(FALSE); @@ -310,6 +338,7 @@ GC_stop_func stop_func; # ifdef SAVE_CALL_CHAIN GC_save_callers(GC_last_stack); # endif + GC_is_full_gc = TRUE; if (!GC_stopped_mark(stop_func)) { if (!GC_incremental) { /* We're partially done and have no way to complete or use */ @@ -401,19 +430,23 @@ GC_stop_func stop_func; { register int i; int dummy; -# ifdef PRINTSTATS +# ifdef PRINTTIMES CLOCK_TYPE start_time, current_time; # endif STOP_WORLD(); - GC_timerstart(); -# ifdef PRINTSTATS + GC_timerstart(); +# ifdef PRINTTIMES GET_TIME(start_time); +# endif +# ifdef CONDPRINT + if (GC_print_stats) { GC_printf1("--> Marking for collection %lu ", (unsigned long) GC_gc_no + 1); GC_printf2("after %lu allocd bytes + %lu wasted bytes\n", (unsigned long) WORDS_TO_BYTES(GC_words_allocd), (unsigned long) WORDS_TO_BYTES(GC_words_wasted)); + } # endif /* Mark from all roots. */ @@ -423,10 +456,12 @@ GC_stop_func stop_func; GC_initiate_gc(); for(i = 0;;i++) { if ((*stop_func)()) { -# ifdef PRINTSTATS +# ifdef CONDPRINT + if (GC_print_stats) { GC_printf0("Abandoned stopped marking after "); GC_printf1("%lu iterations\n", (unsigned long)i); + } # endif GC_timerstop(); GC_deficit = i; /* Give the mutator a chance. */ @@ -441,12 +476,22 @@ GC_stop_func stop_func; GC_printf2("Collection %lu reclaimed %ld bytes", (unsigned long) GC_gc_no - 1, (long)WORDS_TO_BYTES(GC_mem_found)); - GC_printf1(" ---> heapsize = %lu bytes\n", - (unsigned long) GC_heapsize); - /* Printf arguments may be pushed in funny places. Clear the */ - /* space. */ - GC_printf0(""); -# endif +# else +# ifdef CONDPRINT + if (GC_print_stats) { + GC_printf1("Collection %lu finished", (unsigned long) GC_gc_no - 1); + } +# endif +# endif /* !PRINTSTATS */ +# ifdef CONDPRINT + if (GC_print_stats) { + GC_printf1(" ---> heapsize = %lu bytes\n", + (unsigned long) GC_heapsize); + /* Printf arguments may be pushed in funny places. Clear the */ + /* space. */ + GC_printf0(""); + } +# endif /* CONDPRINT */ /* Check all debugged objects for consistency */ if (GC_debugging_started) { @@ -481,7 +526,12 @@ void GC_finish_collection() # ifdef GATHERSTATS GC_mem_found = 0; # endif -# ifdef FIND_LEAK +# if defined(LINUX) && defined(__ELF__) && !defined(SMALL_CONFIG) + if (getenv("GC_PRINT_ADDRESS_MAP") != 0) { + GC_print_address_map(); + } +# endif + if (GC_find_leak) { /* Mark all objects on the free list. All objects should be */ /* marked when we're done. */ { @@ -504,25 +554,26 @@ void GC_finish_collection() } } } - /* Check that everything is marked */ GC_start_reclaim(TRUE); -# else + /* The above just checks; it doesn't really reclaim anything. */ + } - GC_finalize(); -# ifdef STUBBORN_ALLOC - GC_clean_changing_list(); -# endif + GC_finalize(); +# ifdef STUBBORN_ALLOC + GC_clean_changing_list(); +# endif -# ifdef PRINTTIMES - GET_TIME(finalize_time); -# endif +# ifdef PRINTTIMES + GET_TIME(finalize_time); +# endif - /* Clear free list mark bits, in case they got accidentally marked */ - /* Note: HBLKPTR(p) == pointer to head of block containing *p */ - /* Also subtract memory remaining from GC_mem_found count. */ - /* Note that composite objects on free list are cleared. */ - /* Thus accidentally marking a free list is not a problem; only */ - /* objects on the list itself will be marked, and that's fixed here. */ + /* Clear free list mark bits, in case they got accidentally marked */ + /* Note: HBLKPTR(p) == pointer to head of block containing *p */ + /* (or GC_find_leak is set and they were intentionally marked.) */ + /* Also subtract memory remaining from GC_mem_found count. */ + /* Note that composite objects on free list are cleared. */ + /* Thus accidentally marking a free list is not a problem; only */ + /* objects on the list itself will be marked, and that's fixed here. */ { register word size; /* current object size */ register ptr_t p; /* pointer to current object */ @@ -548,15 +599,20 @@ void GC_finish_collection() } -# ifdef PRINTSTATS +# ifdef PRINTSTATS GC_printf1("Bytes recovered before sweep - f.l. count = %ld\n", (long)WORDS_TO_BYTES(GC_mem_found)); -# endif - +# endif /* Reconstruct free lists to contain everything not marked */ - GC_start_reclaim(FALSE); - -# endif /* !FIND_LEAK */ + GC_start_reclaim(FALSE); + if (GC_is_full_gc) { + GC_used_heap_size_after_full = USED_HEAP_SIZE; + GC_need_full_gc = FALSE; + } else { + GC_need_full_gc = + BYTES_TO_WORDS(USED_HEAP_SIZE - GC_used_heap_size_after_full) + > min_words_allocd(); + } # ifdef PRINTSTATS GC_printf2( @@ -573,6 +629,7 @@ void GC_finish_collection() # endif GC_n_attempts = 0; + GC_is_full_gc = FALSE; /* Reset or increment counters for next cycle */ GC_words_allocd_before_gc += GC_words_allocd; GC_non_gc_bytes_at_gc = GC_non_gc_bytes; @@ -640,7 +697,8 @@ word bytes; if (GC_n_heap_sects >= MAX_HEAP_SECTS) { ABORT("Too many heap sections: Increase MAXHINCR or MAX_HEAP_SECTS"); } - if (!GC_install_header(p)) { + phdr = GC_install_header(p); + if (0 == phdr) { /* This is extremely unlikely. Can't add it. This will */ /* almost certainly result in a 0 return from the allocator, */ /* which is entirely appropriate. */ @@ -649,47 +707,25 @@ word bytes; GC_heap_sects[GC_n_heap_sects].hs_start = (ptr_t)p; GC_heap_sects[GC_n_heap_sects].hs_bytes = bytes; GC_n_heap_sects++; - words = BYTES_TO_WORDS(bytes - HDR_BYTES); - phdr = HDR(p); + words = BYTES_TO_WORDS(bytes); phdr -> hb_sz = words; - phdr -> hb_map = (char *)1; /* A value != GC_invalid_map */ + phdr -> hb_map = (unsigned char *)1; /* A value != GC_invalid_map */ phdr -> hb_flags = 0; GC_freehblk(p); GC_heapsize += bytes; - if ((ptr_t)p <= GC_least_plausible_heap_addr + if ((ptr_t)p <= (ptr_t)GC_least_plausible_heap_addr || GC_least_plausible_heap_addr == 0) { - GC_least_plausible_heap_addr = (ptr_t)p - sizeof(word); + GC_least_plausible_heap_addr = (GC_PTR)((ptr_t)p - sizeof(word)); /* Making it a little smaller than necessary prevents */ /* us from getting a false hit from the variable */ /* itself. There's some unintentional reflection */ /* here. */ } - if ((ptr_t)p + bytes >= GC_greatest_plausible_heap_addr) { - GC_greatest_plausible_heap_addr = (ptr_t)p + bytes; + if ((ptr_t)p + bytes >= (ptr_t)GC_greatest_plausible_heap_addr) { + GC_greatest_plausible_heap_addr = (GC_PTR)((ptr_t)p + bytes); } } -#ifdef PRESERVE_LAST - -GC_bool GC_protect_last_block = FALSE; - -GC_bool GC_in_last_heap_sect(p) -ptr_t p; -{ - struct HeapSect * last_heap_sect; - ptr_t start; - ptr_t end; - - if (!GC_protect_last_block) return FALSE; - last_heap_sect = &(GC_heap_sects[GC_n_heap_sects-1]); - start = last_heap_sect -> hs_start; - if (p < start) return FALSE; - end = start + last_heap_sect -> hs_bytes; - if (p >= end) return FALSE; - return TRUE; -} -#endif - # if !defined(NO_DEBUGGING) void GC_print_heap_sects() { @@ -713,8 +749,8 @@ void GC_print_heap_sects() } # endif -ptr_t GC_least_plausible_heap_addr = (ptr_t)ONES; -ptr_t GC_greatest_plausible_heap_addr = 0; +GC_PTR GC_least_plausible_heap_addr = (GC_PTR)ONES; +GC_PTR GC_greatest_plausible_heap_addr = 0; ptr_t GC_max(x,y) ptr_t x, y; @@ -770,9 +806,16 @@ word n; } space = GET_MEM(bytes); if( space == 0 ) { +# ifdef CONDPRINT + if (GC_print_stats) { + GC_printf1("Failed to expand heap by %ld bytes\n", + (unsigned long)bytes); + } +# endif return(FALSE); } -# ifdef PRINTSTATS +# ifdef CONDPRINT + if (GC_print_stats) { GC_printf2("Increasing heap size by %lu after %lu allocated bytes\n", (unsigned long)bytes, (unsigned long)WORDS_TO_BYTES(GC_words_allocd)); @@ -781,6 +824,7 @@ word n; GC_print_block_list(); GC_print_hblkfreelist(); GC_printf0("\n"); # endif + } # endif expansion_slop = 8 * WORDS_TO_BYTES(min_words_allocd()); if (5 * HBLKSIZE * MAXHINCR > expansion_slop) { @@ -823,9 +867,7 @@ word n; LOCK(); if (!GC_is_initialized) GC_init_inner(); result = (int)GC_expand_hp_inner(divHBLKSZ((word)bytes)); -# ifdef PRESERVE_LAST - if (result) GC_protect_last_block = FALSE; -# endif + if (result) GC_requested_heapsize += bytes; UNLOCK(); ENABLE_SIGNALS(); return(result); @@ -839,7 +881,8 @@ GC_bool GC_collect_or_expand(needed_blocks, ignore_off word needed_blocks; GC_bool ignore_off_page; { - if (!GC_incremental && !GC_dont_gc && GC_should_collect()) { + if (!GC_incremental && !GC_dont_gc && + (GC_dont_expand && GC_words_allocd > 0 || GC_should_collect())) { GC_notify_full_gc(); GC_gcollect_inner(); } else { @@ -868,21 +911,17 @@ GC_bool ignore_off_page; GC_notify_full_gc(); GC_gcollect_inner(); } else { - WARN("Out of Memory! Returning NIL!\n", 0); +# if !defined(AMIGA) || !defined(GC_AMIGA_FASTALLOC) + WARN("Out of Memory! Returning NIL!\n", 0); +# endif return(FALSE); } } else { -# ifdef PRINTSTATS - if (GC_fail_count) { +# ifdef CONDPRINT + if (GC_fail_count && GC_print_stats) { GC_printf0("Memory available again ...\n"); } # endif -# ifdef PRESERVE_LAST - if (needed_blocks > 1) GC_protect_last_block = TRUE; - /* We were forced to expand the heap as the result */ - /* of a large block allocation. Avoid breaking up */ - /* new block into small pieces. */ -# endif } } return(TRUE);