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Printer.c
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Printer.c
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/* -----------------------------------------------------------------------------
*
* (c) The GHC Team, 1994-2000.
*
* Heap printer
*
* ---------------------------------------------------------------------------*/
#include "PosixSource.h"
#include "Rts.h"
#include "rts/Bytecodes.h" /* for InstrPtr */
#include "sm/Storage.h"
#include "Printer.h"
#include "RtsUtils.h"
#include <string.h>
#ifdef DEBUG
#include "Disassembler.h"
#include "Apply.h"
/* --------------------------------------------------------------------------
* local function decls
* ------------------------------------------------------------------------*/
static void printStdObjPayload( StgClosure *obj );
#ifdef USING_LIBBFD
static void reset_table ( int size );
static void prepare_table ( void );
static void insert ( StgWord value, const char *name );
#endif
#if 0 /* unused but might be useful sometime */
static rtsBool lookup_name ( char *name, StgWord *result );
static void enZcode ( char *in, char *out );
#endif
static char unZcode ( char ch );
static void printZcoded ( const char *raw );
/* --------------------------------------------------------------------------
* Printer
* ------------------------------------------------------------------------*/
void printPtr( StgPtr p )
{
const char *raw;
raw = lookupGHCName(p);
if (raw != NULL) {
printZcoded(raw);
} else {
debugBelch("%p", p);
}
}
void printObj( StgClosure *obj )
{
debugBelch("Object "); printPtr((StgPtr)obj); debugBelch(" = ");
printClosure(obj);
}
STATIC_INLINE void
printStdObjHdr( StgClosure *obj, char* tag )
{
debugBelch("%s(",tag);
printPtr((StgPtr)obj->header.info);
#ifdef PROFILING
debugBelch(", %s", obj->header.prof.ccs->cc->label);
#endif
}
static void
printStdObjPayload( StgClosure *obj )
{
StgWord i, j;
const StgInfoTable* info;
info = get_itbl(obj);
for (i = 0; i < info->layout.payload.ptrs; ++i) {
debugBelch(", ");
printPtr((StgPtr)obj->payload[i]);
}
for (j = 0; j < info->layout.payload.nptrs; ++j) {
debugBelch(", %pd#",obj->payload[i+j]);
}
debugBelch(")\n");
}
static void
printThunkPayload( StgThunk *obj )
{
StgWord i, j;
const StgInfoTable* info;
info = get_itbl((StgClosure *)obj);
for (i = 0; i < info->layout.payload.ptrs; ++i) {
debugBelch(", ");
printPtr((StgPtr)obj->payload[i]);
}
for (j = 0; j < info->layout.payload.nptrs; ++j) {
debugBelch(", %pd#",obj->payload[i+j]);
}
debugBelch(")\n");
}
static void
printThunkObject( StgThunk *obj, char* tag )
{
printStdObjHdr( (StgClosure *)obj, tag );
printThunkPayload( obj );
}
void
printClosure( StgClosure *obj )
{
obj = UNTAG_CLOSURE(obj);
StgInfoTable *info;
info = get_itbl(obj);
switch ( info->type ) {
case INVALID_OBJECT:
barf("Invalid object");
case CONSTR:
case CONSTR_1_0: case CONSTR_0_1:
case CONSTR_1_1: case CONSTR_0_2: case CONSTR_2_0:
case CONSTR_STATIC:
case CONSTR_NOCAF_STATIC:
{
StgWord i, j;
StgConInfoTable *con_info = get_con_itbl (obj);
debugBelch("%s(", GET_CON_DESC(con_info));
for (i = 0; i < info->layout.payload.ptrs; ++i) {
if (i != 0) debugBelch(", ");
printPtr((StgPtr)obj->payload[i]);
}
for (j = 0; j < info->layout.payload.nptrs; ++j) {
if (i != 0 || j != 0) debugBelch(", ");
debugBelch("%p#", obj->payload[i+j]);
}
debugBelch(")\n");
break;
}
case FUN:
case FUN_1_0: case FUN_0_1:
case FUN_1_1: case FUN_0_2: case FUN_2_0:
case FUN_STATIC:
debugBelch("FUN/%d(",(int)itbl_to_fun_itbl(info)->f.arity);
printPtr((StgPtr)obj->header.info);
#ifdef PROFILING
debugBelch(", %s", obj->header.prof.ccs->cc->label);
#endif
printStdObjPayload(obj);
break;
case PRIM:
debugBelch("PRIM(");
printPtr((StgPtr)obj->header.info);
printStdObjPayload(obj);
break;
case MUT_PRIM:
debugBelch("MUT_PRIM(");
printPtr((StgPtr)obj->header.info);
printStdObjPayload(obj);
break;
case THUNK:
case THUNK_1_0: case THUNK_0_1:
case THUNK_1_1: case THUNK_0_2: case THUNK_2_0:
case THUNK_STATIC:
/* ToDo: will this work for THUNK_STATIC too? */
#ifdef PROFILING
printThunkObject((StgThunk *)obj,GET_PROF_DESC(info));
#else
printThunkObject((StgThunk *)obj,"THUNK");
#endif
break;
case THUNK_SELECTOR:
printStdObjHdr(obj, "THUNK_SELECTOR");
debugBelch(", %p)\n", ((StgSelector *)obj)->selectee);
break;
case BCO:
disassemble( (StgBCO*)obj );
break;
case AP:
{
StgAP* ap = (StgAP*)obj;
StgWord i;
debugBelch("AP("); printPtr((StgPtr)ap->fun);
for (i = 0; i < ap->n_args; ++i) {
debugBelch(", ");
printPtr((P_)ap->payload[i]);
}
debugBelch(")\n");
break;
}
case PAP:
{
StgPAP* pap = (StgPAP*)obj;
StgWord i;
debugBelch("PAP/%d(",(int)pap->arity);
printPtr((StgPtr)pap->fun);
for (i = 0; i < pap->n_args; ++i) {
debugBelch(", ");
printPtr((StgPtr)pap->payload[i]);
}
debugBelch(")\n");
break;
}
case AP_STACK:
{
StgAP_STACK* ap = (StgAP_STACK*)obj;
StgWord i;
debugBelch("AP_STACK("); printPtr((StgPtr)ap->fun);
for (i = 0; i < ap->size; ++i) {
debugBelch(", ");
printPtr((P_)ap->payload[i]);
}
debugBelch(")\n");
break;
}
case IND:
debugBelch("IND(");
printPtr((StgPtr)((StgInd*)obj)->indirectee);
debugBelch(")\n");
break;
case IND_PERM:
debugBelch("IND(");
printPtr((StgPtr)((StgInd*)obj)->indirectee);
debugBelch(")\n");
break;
case IND_STATIC:
debugBelch("IND_STATIC(");
printPtr((StgPtr)((StgInd*)obj)->indirectee);
debugBelch(")\n");
break;
case BLACKHOLE:
debugBelch("BLACKHOLE(");
printPtr((StgPtr)((StgInd*)obj)->indirectee);
debugBelch(")\n");
break;
/* Cannot happen -- use default case.
case RET_BCO:
case RET_SMALL:
case RET_BIG:
case RET_FUN:
*/
case UPDATE_FRAME:
{
StgUpdateFrame* u = (StgUpdateFrame*)obj;
debugBelch("%s(", info_update_frame(obj));
printPtr((StgPtr)GET_INFO((StgClosure *)u));
debugBelch(",");
printPtr((StgPtr)u->updatee);
debugBelch(")\n");
break;
}
case CATCH_FRAME:
{
StgCatchFrame* u = (StgCatchFrame*)obj;
debugBelch("CATCH_FRAME(");
printPtr((StgPtr)GET_INFO((StgClosure *)u));
debugBelch(",");
printPtr((StgPtr)u->handler);
debugBelch(")\n");
break;
}
case UNDERFLOW_FRAME:
{
StgUnderflowFrame* u = (StgUnderflowFrame*)obj;
debugBelch("UNDERFLOW_FRAME(");
printPtr((StgPtr)u->next_chunk);
debugBelch(")\n");
break;
}
case STOP_FRAME:
{
StgStopFrame* u = (StgStopFrame*)obj;
debugBelch("STOP_FRAME(");
printPtr((StgPtr)GET_INFO((StgClosure *)u));
debugBelch(")\n");
break;
}
case ARR_WORDS:
{
StgWord i;
debugBelch("ARR_WORDS(\"");
for (i=0; i<arr_words_words((StgArrWords *)obj); i++)
debugBelch("%" FMT_Word, (W_)((StgArrWords *)obj)->payload[i]);
debugBelch("\")\n");
break;
}
case MUT_ARR_PTRS_CLEAN:
debugBelch("MUT_ARR_PTRS_CLEAN(size=%" FMT_Word ")\n", (W_)((StgMutArrPtrs *)obj)->ptrs);
break;
case MUT_ARR_PTRS_DIRTY:
debugBelch("MUT_ARR_PTRS_DIRTY(size=%" FMT_Word ")\n", (W_)((StgMutArrPtrs *)obj)->ptrs);
break;
case MUT_ARR_PTRS_FROZEN:
debugBelch("MUT_ARR_PTRS_FROZEN(size=%" FMT_Word ")\n", (W_)((StgMutArrPtrs *)obj)->ptrs);
break;
case SMALL_MUT_ARR_PTRS_CLEAN:
debugBelch("SMALL_MUT_ARR_PTRS_CLEAN(size=%" FMT_Word ")\n",
(W_)((StgSmallMutArrPtrs *)obj)->ptrs);
break;
case SMALL_MUT_ARR_PTRS_DIRTY:
debugBelch("SMALL_MUT_ARR_PTRS_DIRTY(size=%" FMT_Word ")\n",
(W_)((StgSmallMutArrPtrs *)obj)->ptrs);
break;
case SMALL_MUT_ARR_PTRS_FROZEN:
debugBelch("SMALL_MUT_ARR_PTRS_FROZEN(size=%" FMT_Word ")\n",
(W_)((StgSmallMutArrPtrs *)obj)->ptrs);
break;
case MVAR_CLEAN:
case MVAR_DIRTY:
{
StgMVar* mv = (StgMVar*)obj;
debugBelch("MVAR(head=%p, tail=%p, value=%p)\n", mv->head, mv->tail, mv->value);
break;
}
case TVAR:
{
StgTVar* tv = (StgTVar*)obj;
debugBelch("TVAR(value=%p, wq=%p, num_updates=%" FMT_Word ")\n", tv->current_value, tv->first_watch_queue_entry, tv->num_updates);
break;
}
case MUT_VAR_CLEAN:
{
StgMutVar* mv = (StgMutVar*)obj;
debugBelch("MUT_VAR_CLEAN(var=%p)\n", mv->var);
break;
}
case MUT_VAR_DIRTY:
{
StgMutVar* mv = (StgMutVar*)obj;
debugBelch("MUT_VAR_DIRTY(var=%p)\n", mv->var);
break;
}
case WEAK:
debugBelch("WEAK(");
debugBelch(" key=%p value=%p finalizer=%p",
(StgPtr)(((StgWeak*)obj)->key),
(StgPtr)(((StgWeak*)obj)->value),
(StgPtr)(((StgWeak*)obj)->finalizer));
debugBelch(")\n");
/* ToDo: chase 'link' ? */
break;
case TSO:
debugBelch("TSO(");
debugBelch("%lu (%p)",(unsigned long)(((StgTSO*)obj)->id), (StgTSO*)obj);
debugBelch(")\n");
break;
case STACK:
debugBelch("STACK");
break;
#if 0
/* Symptomatic of a problem elsewhere, have it fall-through & fail */
case EVACUATED:
debugBelch("EVACUATED(");
printClosure((StgEvacuated*)obj->evacuee);
debugBelch(")\n");
break;
#endif
default:
//barf("printClosure %d",get_itbl(obj)->type);
debugBelch("*** printClosure: unknown type %d ****\n",
(int)get_itbl(obj)->type );
barf("printClosure %d",get_itbl(obj)->type);
return;
}
}
// If you know you have an UPDATE_FRAME, but want to know exactly which.
char *info_update_frame(StgClosure *closure) {
// Note: We intentionally don't take the info table pointer as
// an argument. As it will be confusing whether one should pass
// it pointing to the code or struct members when compiling with
// TABLES_NEXT_TO_CODE.
const StgInfoTable *info = closure->header.info;
if (info == &stg_upd_frame_info) {
return "NORMAL_UPDATE_FRAME";
} else if (info == &stg_bh_upd_frame_info) {
return "BH_UPDATE_FRAME";
} else if (info == &stg_marked_upd_frame_info) {
return "MARKED_UPDATE_FRAME";
} else {
return "ERROR: Not an update frame!!!";
}
}
/*
void printGraph( StgClosure *obj )
{
printClosure(obj);
}
*/
StgPtr
printStackObj( StgPtr sp )
{
/*debugBelch("Stack[%d] = ", &stgStack[STACK_SIZE] - sp); */
StgClosure* c = (StgClosure*)(*sp);
printPtr((StgPtr)*sp);
if (c == (StgClosure*)&stg_ctoi_R1p_info) {
debugBelch("\t\t\tstg_ctoi_ret_R1p_info\n" );
} else
if (c == (StgClosure*)&stg_ctoi_R1n_info) {
debugBelch("\t\t\tstg_ctoi_ret_R1n_info\n" );
} else
if (c == (StgClosure*)&stg_ctoi_F1_info) {
debugBelch("\t\t\tstg_ctoi_ret_F1_info\n" );
} else
if (c == (StgClosure*)&stg_ctoi_D1_info) {
debugBelch("\t\t\tstg_ctoi_ret_D1_info\n" );
} else
if (c == (StgClosure*)&stg_ctoi_V_info) {
debugBelch("\t\t\tstg_ctoi_ret_V_info\n" );
} else
if (get_itbl(c)->type == BCO) {
debugBelch("\t\t\t");
debugBelch("BCO(...)\n");
}
else {
debugBelch("\t\t\t");
printClosure ( (StgClosure*)(*sp));
}
sp += 1;
return sp;
}
static void
printSmallBitmap( StgPtr spBottom, StgPtr payload, StgWord bitmap, nat size )
{
nat i;
for(i = 0; i < size; i++, bitmap >>= 1 ) {
debugBelch(" stk[%ld] (%p) = ", (long)(spBottom-(payload+i)), payload+i);
if ((bitmap & 1) == 0) {
printPtr((P_)payload[i]);
debugBelch("\n");
} else {
debugBelch("Word# %" FMT_Word "\n", (W_)payload[i]);
}
}
}
static void
printLargeBitmap( StgPtr spBottom, StgPtr payload, StgLargeBitmap* large_bitmap, nat size )
{
StgWord bmp;
nat i, j;
i = 0;
for (bmp=0; i < size; bmp++) {
StgWord bitmap = large_bitmap->bitmap[bmp];
j = 0;
for(; i < size && j < BITS_IN(W_); j++, i++, bitmap >>= 1 ) {
debugBelch(" stk[%" FMT_Word "] (%p) = ", (W_)(spBottom-(payload+i)), payload+i);
if ((bitmap & 1) == 0) {
printPtr((P_)payload[i]);
debugBelch("\n");
} else {
debugBelch("Word# %" FMT_Word "\n", (W_)payload[i]);
}
}
}
}
void
printStackChunk( StgPtr sp, StgPtr spBottom )
{
StgWord bitmap;
const StgInfoTable *info;
ASSERT(sp <= spBottom);
for (; sp < spBottom; sp += stack_frame_sizeW((StgClosure *)sp)) {
info = get_itbl((StgClosure *)sp);
switch (info->type) {
case UPDATE_FRAME:
case CATCH_FRAME:
case UNDERFLOW_FRAME:
case STOP_FRAME:
printObj((StgClosure*)sp);
continue;
case RET_SMALL:
debugBelch("RET_SMALL (%p)\n", info);
bitmap = info->layout.bitmap;
printSmallBitmap(spBottom, sp+1,
BITMAP_BITS(bitmap), BITMAP_SIZE(bitmap));
continue;
case RET_BCO: {
StgBCO *bco;
bco = ((StgBCO *)sp[1]);
debugBelch("RET_BCO (%p)\n", sp);
printLargeBitmap(spBottom, sp+2,
BCO_BITMAP(bco), BCO_BITMAP_SIZE(bco));
continue;
}
case RET_BIG:
barf("todo");
case RET_FUN:
{
StgFunInfoTable *fun_info;
StgRetFun *ret_fun;
ret_fun = (StgRetFun *)sp;
fun_info = get_fun_itbl(ret_fun->fun);
debugBelch("RET_FUN (%p) (type=%d)\n", ret_fun->fun, (int)fun_info->f.fun_type);
switch (fun_info->f.fun_type) {
case ARG_GEN:
printSmallBitmap(spBottom, sp+2,
BITMAP_BITS(fun_info->f.b.bitmap),
BITMAP_SIZE(fun_info->f.b.bitmap));
break;
case ARG_GEN_BIG:
printLargeBitmap(spBottom, sp+2,
GET_FUN_LARGE_BITMAP(fun_info),
GET_FUN_LARGE_BITMAP(fun_info)->size);
break;
default:
printSmallBitmap(spBottom, sp+2,
BITMAP_BITS(stg_arg_bitmaps[fun_info->f.fun_type]),
BITMAP_SIZE(stg_arg_bitmaps[fun_info->f.fun_type]));
break;
}
continue;
}
default:
debugBelch("unknown object %d\n", (int)info->type);
barf("printStackChunk");
}
}
}
void printTSO( StgTSO *tso )
{
printStackChunk( tso->stackobj->sp,
tso->stackobj->stack+tso->stackobj->stack_size);
}
/* --------------------------------------------------------------------------
* Address printing code
*
* Uses symbol table in (unstripped executable)
* ------------------------------------------------------------------------*/
/* --------------------------------------------------------------------------
* Simple lookup table
*
* Current implementation is pretty dumb!
* ------------------------------------------------------------------------*/
struct entry {
StgWord value;
const char *name;
};
static nat table_size;
static struct entry* table;
#ifdef USING_LIBBFD
static nat max_table_size;
static void reset_table( int size )
{
max_table_size = size;
table_size = 0;
table = (struct entry *)stgMallocBytes(size * sizeof(struct entry), "Printer.c:reset_table()");
}
static void prepare_table( void )
{
/* Could sort it... */
}
static void insert( StgWord value, const char *name )
{
if ( table_size >= max_table_size ) {
barf( "Symbol table overflow\n" );
}
table[table_size].value = value;
table[table_size].name = name;
table_size = table_size + 1;
}
#endif
#if 0
static rtsBool lookup_name( char *name, StgWord *result )
{
nat i;
for( i = 0; i < table_size && strcmp(name,table[i].name) != 0; ++i ) {
}
if (i < table_size) {
*result = table[i].value;
return rtsTrue;
} else {
return rtsFalse;
}
}
#endif
/* Code from somewhere inside GHC (circa 1994)
* * Z-escapes:
* "std"++xs -> "Zstd"++xs
* char_to_c 'Z' = "ZZ"
* char_to_c '&' = "Za"
* char_to_c '|' = "Zb"
* char_to_c ':' = "Zc"
* char_to_c '/' = "Zd"
* char_to_c '=' = "Ze"
* char_to_c '>' = "Zg"
* char_to_c '#' = "Zh"
* char_to_c '<' = "Zl"
* char_to_c '-' = "Zm"
* char_to_c '!' = "Zn"
* char_to_c '.' = "Zo"
* char_to_c '+' = "Zp"
* char_to_c '\'' = "Zq"
* char_to_c '*' = "Zt"
* char_to_c '_' = "Zu"
* char_to_c c = "Z" ++ show (ord c)
*/
static char unZcode( char ch )
{
switch (ch) {
case 'a' : return ('&');
case 'b' : return ('|');
case 'c' : return (':');
case 'd' : return ('/');
case 'e' : return ('=');
case 'g' : return ('>');
case 'h' : return ('#');
case 'l' : return ('<');
case 'm' : return ('-');
case 'n' : return ('!');
case 'o' : return ('.');
case 'p' : return ('+');
case 'q' : return ('\'');
case 't' : return ('*');
case 'u' : return ('_');
case 'Z' :
case '\0' : return ('Z');
default : return (ch);
}
}
#if 0
/* Precondition: out big enough to handle output (about twice length of in) */
static void enZcode( char *in, char *out )
{
int i, j;
j = 0;
out[ j++ ] = '_';
for( i = 0; in[i] != '\0'; ++i ) {
switch (in[i]) {
case 'Z' :
out[j++] = 'Z';
out[j++] = 'Z';
break;
case '&' :
out[j++] = 'Z';
out[j++] = 'a';
break;
case '|' :
out[j++] = 'Z';
out[j++] = 'b';
break;
case ':' :
out[j++] = 'Z';
out[j++] = 'c';
break;
case '/' :
out[j++] = 'Z';
out[j++] = 'd';
break;
case '=' :
out[j++] = 'Z';
out[j++] = 'e';
break;
case '>' :
out[j++] = 'Z';
out[j++] = 'g';
break;
case '#' :
out[j++] = 'Z';
out[j++] = 'h';
break;
case '<' :
out[j++] = 'Z';
out[j++] = 'l';
break;
case '-' :
out[j++] = 'Z';
out[j++] = 'm';
break;
case '!' :
out[j++] = 'Z';
out[j++] = 'n';
break;
case '.' :
out[j++] = 'Z';
out[j++] = 'o';
break;
case '+' :
out[j++] = 'Z';
out[j++] = 'p';
break;
case '\'' :
out[j++] = 'Z';
out[j++] = 'q';
break;
case '*' :
out[j++] = 'Z';
out[j++] = 't';
break;
case '_' :
out[j++] = 'Z';
out[j++] = 'u';
break;
default :
out[j++] = in[i];
break;
}
}
out[j] = '\0';
}
#endif
const char *lookupGHCName( void *addr )
{
nat i;
for( i = 0; i < table_size && table[i].value != (StgWord) addr; ++i ) {
}
if (i < table_size) {
return table[i].name;
} else {
return NULL;
}
}
static void printZcoded( const char *raw )
{
nat j = 0;
while ( raw[j] != '\0' ) {
if (raw[j] == 'Z') {
debugBelch("%c", unZcode(raw[j+1]));
j = j + 2;
} else {
debugBelch("%c", unZcode(raw[j+1]));
j = j + 1;
}
}
}
/* --------------------------------------------------------------------------
* Symbol table loading
* ------------------------------------------------------------------------*/
/* Causing linking trouble on Win32 plats, so I'm
disabling this for now.
*/
#ifdef USING_LIBBFD
#include <bfd.h>
/* Fairly ad-hoc piece of code that seems to filter out a lot of
* rubbish like the obj-splitting symbols
*/
static rtsBool isReal( flagword flags STG_UNUSED, const char *name )
{
#if 0
/* ToDo: make this work on BFD */
int tp = type & N_TYPE;
if (tp == N_TEXT || tp == N_DATA) {
return (name[0] == '_' && name[1] != '_');
} else {
return rtsFalse;
}
#else
if (*name == '\0' ||
(name[0] == 'g' && name[1] == 'c' && name[2] == 'c') ||
(name[0] == 'c' && name[1] == 'c' && name[2] == '.')) {
return rtsFalse;
}
return rtsTrue;
#endif
}
extern void DEBUG_LoadSymbols( char *name )
{
bfd* abfd;
char **matching;
bfd_init();
abfd = bfd_openr(name, "default");
if (abfd == NULL) {
barf("can't open executable %s to get symbol table", name);
}
if (!bfd_check_format_matches (abfd, bfd_object, &matching)) {
barf("mismatch");
}
{
long storage_needed;
asymbol **symbol_table;
long number_of_symbols;
long num_real_syms = 0;
long i;
storage_needed = bfd_get_symtab_upper_bound (abfd);
if (storage_needed < 0) {
barf("can't read symbol table");
}
#if 0
if (storage_needed == 0) {
debugBelch("no storage needed");
}
#endif
symbol_table = (asymbol **) stgMallocBytes(storage_needed,"DEBUG_LoadSymbols");
number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
if (number_of_symbols < 0) {
barf("can't canonicalise symbol table");
}
for( i = 0; i != number_of_symbols; ++i ) {
symbol_info info;
bfd_get_symbol_info(abfd,symbol_table[i],&info);
/*debugBelch("\t%c\t0x%x \t%s\n",info.type,(nat)info.value,info.name); */
if (isReal(info.type, info.name)) {
num_real_syms += 1;
}
}
IF_DEBUG(interpreter,
debugBelch("Loaded %ld symbols. Of which %ld are real symbols\n",
number_of_symbols, num_real_syms)
);
reset_table( num_real_syms );
for( i = 0; i != number_of_symbols; ++i ) {
symbol_info info;
bfd_get_symbol_info(abfd,symbol_table[i],&info);
if (isReal(info.type, info.name)) {
insert( info.value, info.name );
}
}
stgFree(symbol_table);
}
prepare_table();
}
#else /* HAVE_BFD_H */
extern void DEBUG_LoadSymbols( char *name STG_UNUSED )
{
/* nothing, yet */
}
#endif /* HAVE_BFD_H */
void findPtr(P_ p, int); /* keep gcc -Wall happy */
int searched = 0;
static int
findPtrBlocks (StgPtr p, bdescr *bd, StgPtr arr[], int arr_size, int i)
{
StgPtr q, r, end;
for (; bd; bd = bd->link) {
searched++;
for (q = bd->start; q < bd->free; q++) {
if (UNTAG_CLOSURE((StgClosure*)*q) == (StgClosure *)p) {
if (i < arr_size) {
for (r = bd->start; r < bd->free; r = end) {
// skip over zeroed-out slop
while (*r == 0) r++;
if (!LOOKS_LIKE_CLOSURE_PTR(r)) {
debugBelch("%p found at %p, no closure at %p\n",
p, q, r);
break;
}
end = r + closure_sizeW((StgClosure*)r);
if (q < end) {
debugBelch("%p = ", r);
printClosure((StgClosure *)r);
arr[i++] = r;
break;
}
}
if (r >= bd->free) {
debugBelch("%p found at %p, closure?", p, q);
}
} else {
return i;
}
}
}
}
return i;
}
void
findPtr(P_ p, int follow)
{
nat g, n;
bdescr *bd;
const int arr_size = 1024;
StgPtr arr[arr_size];
int i = 0;
searched = 0;
for (n = 0; n < n_capabilities; n++) {
bd = nurseries[i].blocks;
i = findPtrBlocks(p,bd,arr,arr_size,i);
if (i >= arr_size) return;
}
for (g = 0; g < RtsFlags.GcFlags.generations; g++) {
bd = generations[g].blocks;
i = findPtrBlocks(p,bd,arr,arr_size,i);
bd = generations[g].large_objects;
i = findPtrBlocks(p,bd,arr,arr_size,i);
if (i >= arr_size) return;
}
if (follow && i == 1) {
debugBelch("-->\n");
findPtr(arr[0], 1);
}
}
/* prettyPrintClosure() is for printing out a closure using the data constructor
names found in the info tables. Closures are printed in a fashion that resembles
their Haskell representation. Useful during debugging.
Todo: support for more closure types, and support for non pointer fields in the
payload.
*/
void prettyPrintClosure_ (StgClosure *);
void prettyPrintClosure (StgClosure *obj)
{
prettyPrintClosure_ (obj);
debugBelch ("\n");
}