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Classes | Defines | Functions
dbg_mlc.c File Reference
#include "gc_priv.h"

Go to the source code of this file.

Classes

struct  oh
struct  closure

Defines

#define START_FLAG   ((word)0xfedcedcb)
#define END_FLAG   ((word)0xbcdecdef)
#define DEBUG_BYTES   (sizeof (oh) + sizeof (word))
#define ROUNDED_UP_WORDS(n)   BYTES_TO_WORDS((n) + WORDS_TO_BYTES(1) - 1)
#define ADD_CALL_CHAIN(base, ra)
#define PRINT_CALL_CHAIN(base)
#define EXTRA_ARGS   char * s, int i
#define OPT_RA

Functions

void GC_default_print_heap_obj_proc ()
GC_API void
GC_register_finalizer_no_order 
GC_PROTO ((GC_PTR obj, GC_finalization_proc fn, GC_PTR cd, GC_finalization_proc *ofn, GC_PTR *ocd))
GC_bool GC_has_debug_info (ptr_t p)
ptr_t GC_store_debug_info (ptr_t p, word sz, char *string, word integer)
ptr_t GC_check_annotated_obj (oh *ohdr)
const char * getTypeName (void *ptr)
void GC_print_obj (ptr_t p)
void GC_debug_print_heap_obj_proc (ptr_t p)
void GC_print_smashed_obj (ptr_t p, ptr_t clobbered_addr)
void GC_check_heap_proc ()
void GC_start_debugging ()
void GC_debug_register_displacement (GC_word offset)
GC_PTR GC_debug_malloc (size_t lb, char *s, int i)
GC_PTR GC_debug_malloc_stubborn (size_t lb, char *s, int i)
void GC_debug_change_stubborn (GC_PTR p)
void GC_debug_end_stubborn_change (GC_PTR p)
GC_PTR GC_debug_malloc_atomic (size_t lb, char *s, int i)
GC_PTR GC_debug_malloc_uncollectable (size_t lb, char *s, int i)
void GC_debug_free (GC_PTR p)
GC_PTR GC_debug_realloc (GC_PTR p, size_t lb, char *s, int i)
void GC_check_heap_block (struct hblk *hbp, word dummy)
GC_PTR GC_make_closure (GC_finalization_proc fn, GC_PTR data)
void GC_debug_invoke_finalizer (char *obj, char *data)
void GC_debug_register_finalizer (GC_PTR obj, GC_finalization_proc fn, GC_PTR cd, GC_finalization_proc *ofn, GC_PTR *ocd)
void GC_debug_register_finalizer_no_order (GC_PTR obj, GC_finalization_proc fn, GC_PTR cd, GC_finalization_proc *ofn, GC_PTR *ocd)
void GC_debug_register_finalizer_ignore_self (GC_PTR obj, GC_finalization_proc fn, GC_PTR cd, GC_finalization_proc *ofn, GC_PTR *ocd)

Class Documentation

struct oh

Definition at line 33 of file dbg_mlc.c.

Class Members
word oh_int
word oh_sf
char * oh_string
word oh_sz
struct closure

Definition at line 695 of file dbg_mlc.c.

Class Members
GC_PTR cl_data
GC_finalization_proc cl_fn

Define Documentation

#define ADD_CALL_CHAIN (   base,
  ra 
)

Definition at line 58 of file dbg_mlc.c.

#define DEBUG_BYTES   (sizeof (oh) + sizeof (word))

Definition at line 45 of file dbg_mlc.c.

#define END_FLAG   ((word)0xbcdecdef)

Definition at line 27 of file dbg_mlc.c.

#define EXTRA_ARGS   char * s, int i

Definition at line 344 of file dbg_mlc.c.

Definition at line 345 of file dbg_mlc.c.

Definition at line 59 of file dbg_mlc.c.

Definition at line 47 of file dbg_mlc.c.

#define START_FLAG   ((word)0xfedcedcb)

Definition at line 26 of file dbg_mlc.c.


Function Documentation

Definition at line 117 of file dbg_mlc.c.

{
    register ptr_t body = (ptr_t)(ohdr + 1);
    register word gc_sz = GC_size((ptr_t)ohdr);
    if (ohdr -> oh_sz + DEBUG_BYTES > gc_sz) {
        return((ptr_t)(&(ohdr -> oh_sz)));
    }
    if (ohdr -> oh_sf != (START_FLAG ^ (word)body)) {
        return((ptr_t)(&(ohdr -> oh_sf)));
    }
    if (((word *)ohdr)[BYTES_TO_WORDS(gc_sz)-1] != (END_FLAG ^ (word)body)) {
        return((ptr_t)((word *)ohdr + BYTES_TO_WORDS(gc_sz)-1));
    }
    if (((word *)body)[ROUNDED_UP_WORDS(ohdr -> oh_sz)]
        != (END_FLAG ^ (word)body)) {
        return((ptr_t)((word *)body + ROUNDED_UP_WORDS(ohdr -> oh_sz)));
    }
    return(0);
}

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void GC_check_heap_block ( struct hblk hbp,
word  dummy 
)

Definition at line 649 of file dbg_mlc.c.

{
    register struct hblkhdr * hhdr = HDR(hbp);
    register word sz = hhdr -> hb_sz;
    register int word_no;
    register word *p, *plim;
    
    p = (word *)(hbp->hb_body);
    word_no = HDR_WORDS;
    if (sz > MAXOBJSZ) {
    plim = p;
    } else {
        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;
    }
}

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Definition at line 685 of file dbg_mlc.c.

{
#   ifndef SMALL_CONFIG
    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);
}

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Definition at line 402 of file dbg_mlc.c.

{
    register GC_PTR q = GC_base(p);
    register hdr * hhdr;
    
    if (q == 0) {
        GC_err_printf1("Bad argument: 0x%lx to GC_debug_change_stubborn\n",
                   (unsigned long) p);
        ABORT("GC_debug_change_stubborn: bad arg");
    }
    hhdr = HDR(q);
    if (hhdr -> hb_obj_kind != STUBBORN) {
        GC_err_printf1("GC_debug_change_stubborn arg not stubborn: 0x%lx\n",
                   (unsigned long) p);
        ABORT("GC_debug_change_stubborn: arg not stubborn");
    }
    GC_change_stubborn(q);
}

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Definition at line 422 of file dbg_mlc.c.

{
    register GC_PTR q = GC_base(p);
    register hdr * hhdr;
    
    if (q == 0) {
        GC_err_printf1("Bad argument: 0x%lx to GC_debug_end_stubborn_change\n",
                   (unsigned long) p);
        ABORT("GC_debug_end_stubborn_change: bad arg");
    }
    hhdr = HDR(q);
    if (hhdr -> hb_obj_kind != STUBBORN) {
        GC_err_printf1("debug_end_stubborn_change arg not stubborn: 0x%lx\n",
                   (unsigned long) p);
        ABORT("GC_debug_end_stubborn_change: arg not stubborn");
    }
    GC_end_stubborn_change(q);
}

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Definition at line 525 of file dbg_mlc.c.

{
    register GC_PTR base = GC_base(p);
    register ptr_t clobbered;
    
    /* ignore free(NULL) */
    if (p == 0)
      return;

    if (base == 0) {
        GC_err_printf1("Attempt to free invalid pointer %lx\n",
                   (unsigned long)p);
        if (p != 0) ABORT("free(invalid pointer)");
    }
    if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
        GC_err_printf1(
              "GC_debug_free called on pointer %lx wo debugging info\n",
              (unsigned long)p);
    } else {
      oh * ohdr = (oh *)base;
      clobbered = GC_check_annotated_obj(ohdr);
      if (clobbered != 0) {
        if (ohdr -> oh_sz == GC_size(base)) {
            GC_err_printf0(
                  "GC_debug_free: found previously deallocated (?) object at ");
        } else {
            GC_err_printf0("GC_debug_free: found smashed object at ");
        }
        GC_print_smashed_obj(p, clobbered);
      }
      /* Invalidate size */
      ohdr -> oh_sz = GC_size(base);
    }
#   ifdef FIND_LEAK
        GC_free(base);
#   else
    {
        register hdr * hhdr = HDR(p);
        GC_bool uncollectable = FALSE;

        if (hhdr ->  hb_obj_kind == UNCOLLECTABLE) {
        uncollectable = TRUE;
        }
#       ifdef ATOMIC_UNCOLLECTABLE
        if (hhdr ->  hb_obj_kind == AUNCOLLECTABLE) {
            uncollectable = TRUE;
        }
#       endif
        if (uncollectable) GC_free(base);
    }
#   endif
}

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void GC_debug_invoke_finalizer ( char *  obj,
char *  data 
)

Definition at line 719 of file dbg_mlc.c.

{
    register struct closure * cl = (struct closure *) data;
    
    (*(cl -> cl_fn))((GC_PTR)((char *)obj + sizeof(oh)), cl -> cl_data);
} 

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GC_PTR GC_debug_malloc ( size_t  lb,
char *  s,
int  i 
)

Definition at line 351 of file dbg_mlc.c.

{
    GC_PTR result = GC_malloc(lb + DEBUG_BYTES);
    
    if (result == 0) {
        GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
                   (unsigned long) lb);
        GC_err_puts(s);
        GC_err_printf1(":%ld)\n", (unsigned long)i);
        return(0);
    }
    if (!GC_debugging_started) {
        GC_start_debugging();
    }
    ADD_CALL_CHAIN(result, ra);
    return (GC_store_debug_info(result, (word)lb, s, (word)i));
}

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GC_PTR GC_debug_malloc_atomic ( size_t  lb,
char *  s,
int  i 
)

Definition at line 447 of file dbg_mlc.c.

{
    GC_PTR result = GC_malloc_atomic(lb + DEBUG_BYTES);
    
    if (result == 0) {
        GC_err_printf1("GC_debug_malloc_atomic(%ld) returning NIL (",
                  (unsigned long) lb);
        GC_err_puts(s);
        GC_err_printf1(":%ld)\n", (unsigned long)i);
        return(0);
    }
    if (!GC_debugging_started) {
        GC_start_debugging();
    }
    ADD_CALL_CHAIN(result, ra);
    return (GC_store_debug_info(result, (word)lb, s, (word)i));
}

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GC_PTR GC_debug_malloc_stubborn ( size_t  lb,
char *  s,
int  i 
)

Definition at line 380 of file dbg_mlc.c.

{
    GC_PTR result = GC_malloc_stubborn(lb + DEBUG_BYTES);
    
    if (result == 0) {
        GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
                   (unsigned long) lb);
        GC_err_puts(s);
        GC_err_printf1(":%ld)\n", (unsigned long)i);
        return(0);
    }
    if (!GC_debugging_started) {
        GC_start_debugging();
    }
    ADD_CALL_CHAIN(result, ra);
    return (GC_store_debug_info(result, (word)lb, s, (word)i));
}

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GC_PTR GC_debug_malloc_uncollectable ( size_t  lb,
char *  s,
int  i 
)

Definition at line 472 of file dbg_mlc.c.

{
    GC_PTR result = GC_malloc_uncollectable(lb + DEBUG_BYTES);
    
    if (result == 0) {
        GC_err_printf1("GC_debug_malloc_uncollectable(%ld) returning NIL (",
                  (unsigned long) lb);
        GC_err_puts(s);
        GC_err_printf1(":%ld)\n", (unsigned long)i);
        return(0);
    }
    if (!GC_debugging_started) {
        GC_start_debugging();
    }
    ADD_CALL_CHAIN(result, ra);
    return (GC_store_debug_info(result, (word)lb, s, (word)i));
}

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Definition at line 286 of file dbg_mlc.c.

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GC_PTR GC_debug_realloc ( GC_PTR  p,
size_t  lb,
char *  s,
int  i 
)

Definition at line 583 of file dbg_mlc.c.

{
    register GC_PTR base = GC_base(p);
    register ptr_t clobbered;
    register GC_PTR result;
    register size_t copy_sz = lb;
    register size_t old_sz;
    register hdr * hhdr;
    
    if (p == 0) return(GC_debug_malloc(lb, OPT_RA s, i));
    if (base == 0) {
        GC_err_printf1(
              "Attempt to reallocate invalid pointer %lx\n", (unsigned long)p);
        ABORT("realloc(invalid pointer)");
    }
    if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
        GC_err_printf1(
            "GC_debug_realloc called on pointer %lx wo debugging info\n",
            (unsigned long)p);
        return(GC_realloc(p, lb));
    }
    hhdr = HDR(base);
    switch (hhdr -> hb_obj_kind) {
#    ifdef STUBBORN_ALLOC
      case STUBBORN:
        result = GC_debug_malloc_stubborn(lb, OPT_RA s, i);
        break;
#    endif
      case NORMAL:
        result = GC_debug_malloc(lb, OPT_RA s, i);
        break;
      case PTRFREE:
        result = GC_debug_malloc_atomic(lb, OPT_RA s, i);
        break;
      case UNCOLLECTABLE:
    result = GC_debug_malloc_uncollectable(lb, OPT_RA s, i);
    break;
#    ifdef ATOMIC_UNCOLLECTABLE
      case AUNCOLLECTABLE:
    result = GC_debug_malloc_atomic_uncollectable(lb, OPT_RA s, i);
    break;
#    endif
      default:
        GC_err_printf0("GC_debug_realloc: encountered bad kind\n");
        ABORT("bad kind");
    }
    clobbered = GC_check_annotated_obj((oh *)base);
    if (clobbered != 0) {
        GC_err_printf0("GC_debug_realloc: found smashed object at ");
        GC_print_smashed_obj(p, clobbered);
    }
    old_sz = ((oh *)base) -> oh_sz;
    if (old_sz < copy_sz) copy_sz = old_sz;
    if (result == 0) return(0);
    BCOPY(p, result,  copy_sz);
    GC_debug_free(p);
    return(result);
}

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Definition at line 332 of file dbg_mlc.c.

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void GC_debug_register_finalizer ( GC_PTR  obj,
GC_finalization_proc  fn,
GC_PTR  cd,
GC_finalization_proc *  ofn,
GC_PTR ocd 
)

Definition at line 735 of file dbg_mlc.c.

{
    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(base, GC_debug_invoke_finalizer,
                  GC_make_closure(fn,cd), ofn, ocd);
}

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void GC_debug_register_finalizer_ignore_self ( GC_PTR  obj,
GC_finalization_proc  fn,
GC_PTR  cd,
GC_finalization_proc *  ofn,
GC_PTR ocd 
)

Definition at line 785 of file dbg_mlc.c.

{
    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(base, GC_debug_invoke_finalizer,
                          GC_make_closure(fn,cd), ofn, ocd);
}

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void GC_debug_register_finalizer_no_order ( GC_PTR  obj,
GC_finalization_proc  fn,
GC_PTR  cd,
GC_finalization_proc *  ofn,
GC_PTR ocd 
)

Definition at line 760 of file dbg_mlc.c.

{
    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(base, GC_debug_invoke_finalizer,
                          GC_make_closure(fn,cd), ofn, ocd);
 }

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Definition at line 66 of file dbg_mlc.c.

{
    register oh * ohdr = (oh *)p;
    register ptr_t body = (ptr_t)(ohdr + 1);
    register word sz = GC_size((ptr_t) ohdr);
    
    if (HBLKPTR((ptr_t)ohdr) != HBLKPTR((ptr_t)body)
        || sz < sizeof (oh)) {
        return(FALSE);
    }
    if (ohdr -> oh_sz == sz) {
        /* Object may have had debug info, but has been deallocated */
        return(FALSE);
    }
    if (ohdr -> oh_sf == (START_FLAG ^ (word)body)) return(TRUE);
    if (((word *)ohdr)[BYTES_TO_WORDS(sz)-1] == (END_FLAG ^ (word)body)) {
        return(TRUE);
    }
    return(FALSE);
}

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GC_PTR GC_make_closure ( GC_finalization_proc  fn,
GC_PTR  data 
)

Definition at line 703 of file dbg_mlc.c.

{
    struct closure * result =
            (struct closure *) GC_malloc(sizeof (struct closure));
    
    result -> cl_fn = fn;
    result -> cl_data = data;
    return((GC_PTR)result);
}

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Definition at line 140 of file dbg_mlc.c.

{
    register oh * ohdr = (oh *)GC_base(p);
    register word *wp, *wend;
    
    wp = (word*)((unsigned long)ohdr + sizeof(oh));

    GC_err_printf3("0x%08lX <%s> (%ld)\n", wp, getTypeName(wp),
                   (unsigned long)(ohdr -> oh_sz));

    /* print all potential references held by this object. */
    wend = (word*)((unsigned long)wp + ohdr -> oh_sz);
    while (wp < wend) GC_err_printf1("\t0x%08lX\n", *wp++);

    PRINT_CALL_CHAIN(ohdr);
}

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void GC_print_smashed_obj ( ptr_t  p,
ptr_t  clobbered_addr 
)

Definition at line 296 of file dbg_mlc.c.

{
    register oh * ohdr = (oh *)GC_base(p);
    
    GC_err_printf2("0x%lx in object at 0x%lx(", (unsigned long)clobbered_addr,
                                (unsigned long)p);
    if (clobbered_addr <= (ptr_t)(&(ohdr -> oh_sz))
        || ohdr -> oh_string == 0) {
        GC_err_printf1("<smashed>, appr. sz = %ld)\n",
                   (GC_size((ptr_t)ohdr) - DEBUG_BYTES));
    } else {
        if (ohdr -> oh_string[0] == '\0') {
            GC_err_puts("EMPTY(smashed?)");
        } else {
            GC_err_puts(ohdr -> oh_string);
        }
        GC_err_printf2(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int),
                              (unsigned long)(ohdr -> oh_sz));
        PRINT_CALL_CHAIN(ohdr);
    }
}

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GC_API void GC_register_finalizer_no_order GC_PROTO ( (GC_PTR obj, GC_finalization_proc fn, GC_PTR cd, GC_finalization_proc *ofn, GC_PTR *ocd)  )

Definition at line 321 of file dbg_mlc.c.

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ptr_t GC_store_debug_info ( ptr_t  p,
word  sz,
char *  string,
word  integer 
)

Definition at line 90 of file dbg_mlc.c.

{
    register oh * ohdr = (oh *)p;
    register word * result = (word *)(ohdr + 1);
    DCL_LOCK_STATE;
    
    /* There is some argument that we should dissble signals here.  */
    /* But that's expensive.  And this way things should only appear    */
    /* inconsistent while we're in the handler.             */
    LOCK();
    ohdr -> oh_string = string;
    ohdr -> oh_int = integer;
    ohdr -> oh_sz = sz;
    ohdr -> oh_sf = START_FLAG ^ (word)result;
    ((word *)p)[BYTES_TO_WORDS(GC_size(p))-1] =
         result[ROUNDED_UP_WORDS(sz)] = END_FLAG ^ (word)result;
    UNLOCK();
    return((ptr_t)result);
}

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const char* getTypeName ( void ptr)

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