From: Hans Boehm Date: Sat, 28 Aug 2004 00:41:41 +0000 (+0000) Subject: backgraph.c, gc_priv.h (GC_traverse_back_graph, [...]): split GC_traverse_back_graph. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3c1cbf58a609a29362ed15c322d588797f3f4cc5;p=gcc.git backgraph.c, gc_priv.h (GC_traverse_back_graph, [...]): split GC_traverse_back_graph. * backgraph.c, gc_priv.h (GC_traverse_back_graph, GC_print_back_graph_stats): split GC_traverse_back_graph. * backgraph.c: Dynamically grow in_progress_space. * finalize.c (GC_notify_or_invoke_finalizers): also call GC_print_back_graph_stats. * alloc.c, finalize.c, gc_priv.h (GC_generate_random_backtrace_no_gc, GC_print_back_height): Move delarations to header file. * configure.ac: rename --enable-full-debug to --enable-gc-debug. * configure: Regenerate. From-SVN: r86685 --- diff --git a/boehm-gc/ChangeLog b/boehm-gc/ChangeLog index 9ce395c7546..4d48b580265 100644 --- a/boehm-gc/ChangeLog +++ b/boehm-gc/ChangeLog @@ -1,3 +1,15 @@ +2004-08-27 Hans Boehm + + * backgraph.c, gc_priv.h (GC_traverse_back_graph, + GC_print_back_graph_stats): split GC_traverse_back_graph. + * backgraph.c: Dynamically grow in_progress_space. + * finalize.c (GC_notify_or_invoke_finalizers): also call + GC_print_back_graph_stats. + * alloc.c, finalize.c, gc_priv.h (GC_generate_random_backtrace_no_gc, + GC_print_back_height): Move delarations to header file. + * configure.ac: rename --enable-full-debug to --enable-gc-debug. + * configure: Regenerate. + 2004-08-23 Hans Boehm * aix_irix_threads.c: Move _THREADS checks after gc_priv.h include. diff --git a/boehm-gc/alloc.c b/boehm-gc/alloc.c index 1ac6ff8111f..45c71d3fd06 100644 --- a/boehm-gc/alloc.c +++ b/boehm-gc/alloc.c @@ -104,8 +104,6 @@ word GC_free_space_divisor = 3; extern GC_bool GC_collection_in_progress(); /* Collection is in progress, or was abandoned. */ -extern GC_bool GC_print_back_height; - int GC_never_stop_func GC_PROTO((void)) { return(0); } unsigned long GC_time_limit = TIME_LIMIT; diff --git a/boehm-gc/backgraph.c b/boehm-gc/backgraph.c index 7baf5b103e4..94757c89158 100644 --- a/boehm-gc/backgraph.c +++ b/boehm-gc/backgraph.c @@ -87,7 +87,7 @@ static back_edges * new_back_edges(void) { if (0 == back_edge_space) { back_edge_space = (back_edges *) - sbrk(MAX_BACK_EDGE_STRUCTS*sizeof(back_edges)); + GET_MEM(MAX_BACK_EDGE_STRUCTS*sizeof(back_edges)); } if (0 != avail_back_edges) { back_edges * result = avail_back_edges; @@ -115,17 +115,31 @@ static void deallocate_back_edges(back_edges *p) /* Table of objects that are currently on the depth-first search */ /* stack. Only objects with in-degree one are in this table. */ /* Other objects are identified using HEIGHT_IN_PROGRESS. */ -/* This data structure NEEDS IMPROVEMENT. */ -#define MAX_IN_PROGRESS 10000 +/* FIXME: This data structure NEEDS IMPROVEMENT. */ +#define INITIAL_IN_PROGRESS 10000 static ptr_t * in_progress_space = 0; -static int n_in_progress = 0; +static size_t in_progress_size = 0; +static size_t n_in_progress = 0; static void push_in_progress(ptr_t p) { + if (n_in_progress >= in_progress_size) + if (in_progress_size == 0) { + in_progress_size = INITIAL_IN_PROGRESS; + in_progress_space = (ptr_t *)GET_MEM(in_progress_size * sizeof(ptr_t)); + } else { + ptr_t * new_in_progress_space; + in_progress_size *= 2; + new_in_progress_space = (ptr_t *) + GET_MEM(in_progress_size * sizeof(ptr_t)); + BCOPY(in_progress_space, new_in_progress_space, + n_in_progress * sizeof(ptr_t)); + in_progress_space = new_in_progress_space; + /* FIXME: This just drops the old space. */ + } if (in_progress_space == 0) - in_progress_space = sbrk(MAX_IN_PROGRESS * sizeof(ptr_t)); - if (n_in_progress == MAX_IN_PROGRESS) - ABORT("Exceeded MAX_IN_PROGRESS"); + ABORT("MAKE_BACK_GRAPH: Out of in-progress space: " + "Huge linear data structure?"); in_progress_space[n_in_progress++] = p; } @@ -320,8 +334,8 @@ static void add_back_edges(ptr_t p, word n_words, word gc_descr) } } -/* Rebuild the reprentation of the backward reachability graph. */ -/* Does not examine mark bits. Can be called before GC. */ +/* Rebuild the representation of the backward reachability graph. */ +/* Does not examine mark bits. Can be called before GC. */ void GC_build_back_graph(void) { GC_apply_to_each_object(add_back_edges); @@ -426,15 +440,20 @@ static void update_max_height(ptr_t p, word n_words, word gc_descr) } } +word GC_max_max_height = 0; + void GC_traverse_back_graph(void) { - static word max_max_height = 0; GC_max_height = 0; GC_apply_to_each_object(update_max_height); +} + +void GC_print_back_graph_stats(void) +{ GC_printf2("Maximum backwards height of reachable objects at GC %lu is %ld\n", (unsigned long) GC_gc_no, GC_max_height); - if (GC_max_height > max_max_height) { - max_max_height = GC_max_height; + if (GC_max_height > GC_max_max_height) { + GC_max_max_height = GC_max_height; GC_printf0("The following unreachable object is last in a longest chain " "of unreachable objects:\n"); GC_print_heap_obj(GC_deepest_obj); diff --git a/boehm-gc/configure b/boehm-gc/configure index d746215432d..7cbcb5f2ac0 100755 --- a/boehm-gc/configure +++ b/boehm-gc/configure @@ -852,7 +852,7 @@ Optional Features: --enable-fast-install=PKGS optimize for fast installation default=yes --disable-libtool-lock avoid locking (might break parallel builds) --enable-parallel-mark parallelize marking and free list construction - --enable-full-debug include full support for pointer backtracing etc. + --enable-gc-debug include full support for pointer backtracing etc. Optional Packages: --with-PACKAGE[=ARG] use PACKAGE [ARG=yes] @@ -6495,10 +6495,10 @@ _ACEOF fi -# Check whether --enable-full-debug or --disable-full-debug was given. -if test "${enable_full_debug+set}" = set; then - enableval="$enable_full_debug" - if test "$enable_full_debug" = "yes"; then +# Check whether --enable-gc-debug or --disable-gc-debug was given. +if test "${enable_gc_debug+set}" = set; then + enableval="$enable_gc_debug" + if test "$enable_gc_debug" = "yes"; then { echo "$as_me:$LINENO: WARNING: \"Must define GC_DEBUG and use debug alloc. in clients.\"" >&5 echo "$as_me: WARNING: \"Must define GC_DEBUG and use debug alloc. in clients.\"" >&2;} cat >>confdefs.h <<\_ACEOF diff --git a/boehm-gc/configure.ac b/boehm-gc/configure.ac index d14b48b4a86..b98d8fbbc00 100644 --- a/boehm-gc/configure.ac +++ b/boehm-gc/configure.ac @@ -426,9 +426,9 @@ if test -n "${with_cross_host}"; then AC_DEFINE(NO_DEBUGGING) fi -AC_ARG_ENABLE(full-debug, -[ --enable-full-debug include full support for pointer backtracing etc.], -[ if test "$enable_full_debug" = "yes"; then +AC_ARG_ENABLE(gc-debug, +[ --enable-gc-debug include full support for pointer backtracing etc.], +[ if test "$enable_gc_debug" = "yes"; then AC_MSG_WARN("Must define GC_DEBUG and use debug alloc. in clients.") AC_DEFINE(KEEP_BACK_PTRS) AC_DEFINE(DBG_HDRS_ALL) @@ -444,8 +444,8 @@ AC_ARG_ENABLE(full-debug, i[3456]86-*-dgux*) AC_DEFINE(MAKE_BACK_GRAPH) ;; - esac ] - fi) + esac + fi]) if test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then diff --git a/boehm-gc/finalize.c b/boehm-gc/finalize.c index e103228c2af..893f825976f 100644 --- a/boehm-gc/finalize.c +++ b/boehm-gc/finalize.c @@ -807,24 +807,21 @@ void (* GC_finalizer_notifier)() = (void (*) GC_PROTO((void)))0; static GC_word last_finalizer_notification = 0; -#ifdef KEEP_BACK_PTRS -void GC_generate_random_backtrace_no_gc(void); -#endif - void GC_notify_or_invoke_finalizers GC_PROTO((void)) { /* This is a convenient place to generate backtraces if appropriate, */ /* since that code is not callable with the allocation lock. */ -# ifdef KEEP_BACK_PTRS - if (GC_backtraces > 0) { - static word last_back_trace_gc_no = 3; /* Skip early ones. */ - long i; +# if defined(KEEP_BACK_PTRS) || defined(MAKE_BACK_GRAPH) + static word last_back_trace_gc_no = 1; /* Skip first one. */ - LOCK(); - if (GC_gc_no > last_back_trace_gc_no) { + if (GC_gc_no > last_back_trace_gc_no) { + word i; + +# ifdef KEEP_BACK_PTRS + LOCK(); /* Stops when GC_gc_no wraps; that's OK. */ - last_back_trace_gc_no = (word)(-1); /* disable others. */ - for (i = 0; i < GC_backtraces; ++i) { + last_back_trace_gc_no = (word)(-1); /* disable others. */ + for (i = 0; i < GC_backtraces; ++i) { /* FIXME: This tolerates concurrent heap mutation, */ /* which may cause occasional mysterious results. */ /* We need to release the GC lock, since GC_print_callers */ @@ -832,10 +829,14 @@ void GC_notify_or_invoke_finalizers GC_PROTO((void)) UNLOCK(); GC_generate_random_backtrace_no_gc(); LOCK(); - } - last_back_trace_gc_no = GC_gc_no; - } - UNLOCK(); + } + last_back_trace_gc_no = GC_gc_no; + UNLOCK(); +# endif +# ifdef MAKE_BACK_GRAPH + if (GC_print_back_height) + GC_print_back_graph_stats(); +# endif } # endif if (GC_finalize_now == 0) return; diff --git a/boehm-gc/include/private/gc_priv.h b/boehm-gc/include/private/gc_priv.h index 08dd8ea247b..561e4032628 100644 --- a/boehm-gc/include/private/gc_priv.h +++ b/boehm-gc/include/private/gc_priv.h @@ -1725,6 +1725,13 @@ extern GC_bool GC_print_stats; /* Produce at least some logging output */ #ifdef KEEP_BACK_PTRS extern long GC_backtraces; + void GC_generate_random_backtrace_no_gc(void); +#endif + +extern GC_bool GC_print_back_height; + +#ifdef MAKE_BACK_GRAPH + void GC_print_back_graph_stats(void); #endif /* Macros used for collector internal allocation. */