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2ca29d208f
yap-6.3/C/save.c
Vítor Santos Costa 5a668febd9 new slot implementation
2015-02-03 02:36:51 +00:00

1879 lines
46 KiB
C
Executable File
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/*************************************************************************
* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: save.c *
* Last rev: *
* mods: *
* comments: saving and restoring a Prolog computation *
* *
*************************************************************************/
#ifdef SCCS
static char SccsId[] = "@(#)save.c 1.3 3/15/90";
#endif
#include "config.h"
#if _MSC_VER || defined(__MINGW32__)
#if HAVE_WINSOCK2_H
#include <winsock2.h>
#endif
#include <windows.h>
#include <psapi.h>
#endif
#include "absmi.h"
#include "SWI-Stream.h"
#include "alloc.h"
#if USE_DL_MALLOC
#include "dlmalloc.h"
#endif
#include "yapio.h"
#include "sshift.h"
#include "Foreign.h"
#if HAVE_STRING_H
#include <string.h>
#endif
#if !HAVE_STRNCAT
#define strncat(X,Y,Z) strcat(X,Y)
#endif
#if !HAVE_STRNCPY
#define strncpy(X,Y,Z) strcpy(X,Y)
#endif
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#include "iopreds.h"
/********* hack for accesing several kinds of terms. Should be cleaned **/
static char StartUpFile[] = "startup.yss";
static char end_msg[256] ="*** End of YAP saved state *****";
/* SWI IO, must be restarted after restore */
void initIO(void);
#ifdef DEBUG
/*
*
#FOR DEBUGGING define DEBUG_RESTORE0 to check the file stuff,
#define DEBUG_RESTORE1 to see if it is able to prepare the chain,
#define DEBUG_RESTORE2 to see how things are going,
#define DEBUG_RESTORE3 to check if the atom chain is still a working chain,
* define DEBUG_RESTORE4 if you want to set the output for some
* particular file,
* define DEBUG_RESTORE5 if you want to see how the stacks are being
* cleaned up,
* define DEBUG_RESTORE6 if you want to follow the execution in
*
* Also a file is defined where you can write things, by default stderr
*
* Good Luck
*/
#endif
static int myread(IOSTREAM *, char *, Int);
static Int mywrite(IOSTREAM *, char *, Int);
static IOSTREAM *open_file(char *, int);
static int close_file(void);
static Int putout(CELL);
static Int putcellptr(CELL *);
static CELL get_cell(void);
static CELL *get_cellptr( /* CELL * */ void);
static int put_info(int, int CACHE_TYPE);
static int save_regs(int CACHE_TYPE);
static int save_code_info(void);
static int save_heap(void);
static int save_stacks(int CACHE_TYPE);
static int save_crc(void);
static Int do_save(int CACHE_TYPE);
static Int p_save2( CACHE_TYPE1 );
static Int p_save_program( CACHE_TYPE1 );
static int check_header(CELL *, CELL *, CELL *, CELL * CACHE_TYPE);
static int get_heap_info(CACHE_TYPE1);
static int get_regs(int CACHE_TYPE);
static int get_insts(OPCODE []);
static int get_hash(void);
static int CopyCode( CACHE_TYPE1 );
static int CopyStacks( CACHE_TYPE1 );
static int get_coded(int, OPCODE [] CACHE_TYPE);
static void restore_codes(void);
static void RestoreDB(DBEntry * CACHE_TYPE);
static void RestoreDBTerm(DBTerm *, int CACHE_TYPE);
static void CleanClauses(yamop *, yamop *,PredEntry * CACHE_TYPE);
static void rehash(CELL *, int, int CACHE_TYPE);
static void CleanCode(PredEntry * CACHE_TYPE);
static void RestoreEntries(PropEntry *, int CACHE_TYPE);
static void RestoreFreeSpace( CACHE_TYPE1 );
static void restore_heap(void);
#ifdef DEBUG_RESTORE3
static void ShowAtoms(void);
static void ShowEntries(PropEntry *);
#endif
static int OpenRestore(char *, char *, CELL *, CELL *, CELL *, CELL *, IOSTREAM **);
static void CloseRestore(void);
#ifndef _WIN32
static int check_opcodes(OPCODE []);
#endif
static void RestoreHeap(OPCODE [] CACHE_TYPE);
static Int p_restore( CACHE_TYPE1 );
static void restore_heap_regs( CACHE_TYPE1 );
static void restore_regs(int CACHE_TYPE);
#ifdef MACYAP
static void NewFileInfo(long, long);
extern int DefVol;
#endif
#ifdef _WIN32
#if HAVE_IO_H
#include <io.h>
#endif
#endif
#ifdef LIGHT
#include <unix.h>
#include <strings.h>
void
LightBug(char *);
static void
LightBug(s)
char *s;
{
}
#endif /* LIGHT */
static Int
do_system_error(yap_error_number etype, const char *msg)
{
CACHE_REGS
#if HAVE_SNPRINTF
#if HAVE_STRERROR
snprintf(LOCAL_ErrorSay,MAX_ERROR_MSG_SIZE,"%s (%s when reading %s)", msg, strerror(errno), LOCAL_FileNameBuf);
#else
snprintf(LOCAL_ErrorSay,MAX_ERROR_MSG_SIZE,"%s, (system error %d when reading %s)",msg,errno,LOCAL_FileNameBuf);
#endif
#else
#if HAVE_STRERROR
sprintf(LOCAL_ErrorSay,"%s, (%s when reading %s)",msg,strerror(errno),LOCAL_FileNameBuf);
#else
sprintf(LOCAL_ErrorSay,"%s, (system error %d when reading %s)",msg,errno,LOCAL_FileNameBuf);
#endif
#endif
LOCAL_ErrorMessage = LOCAL_ErrorSay;
LOCAL_Error_TYPE = etype;
return -1;
}
inline static
int myread(IOSTREAM *fd, char *buffer, Int len) {
ssize_t nread;
while (len > 0) {
nread = Sfread(buffer, 1, (int)len, fd);
if (nread < 1) {
return do_system_error(PERMISSION_ERROR_INPUT_PAST_END_OF_STREAM,"bad read on saved state");
}
buffer += nread;
len -= nread;
}
return len;
}
inline static
Int
mywrite(IOSTREAM *fd, char *buff, Int len) {
ssize_t nwritten;
while (len > 0) {
nwritten = Sfwrite(buff, 1, (size_t)len, fd);
if (nwritten < 0) {
return do_system_error(SYSTEM_ERROR,"bad write on saved state");
}
buff += nwritten;
len -= nwritten;
}
return len;
}
#define FullSaved 1
/* Where the code was before */
typedef CELL *CELLPOINTER;
static IOSTREAM *splfild = NULL;
#ifdef DEBUG
#ifdef DEBUG_RESTORE4
static FILE *errout;
#else
#define errout GLOBAL_stderr
#endif
#endif /* DEBUG */
static Int OldHeapUsed;
static CELL which_save;
/* Open a file to read or to write */
static IOSTREAM *
open_file(char *my_file, int flag)
{
IOSTREAM *splfild;
char flags[6];
int i=0;
#if __ANDROID__
if (strstr(my_file, "/assets/") == my_file) {
if (flag == O_RDONLY) {
my_file += strlen("/assets/");
AAsset* asset = AAssetManager_open(GLOBAL_assetManager, my_file, AASSET_MODE_UNKNOWN);
if (!asset)
return NULL;
AAsset_close( asset );
return NULL; // usually the file will be compressed, so there is no point in actually trying to open it.
}
return NULL;
}
#endif
if (flag & O_RDONLY) {
flags[i++] = 'r';
}
if (flag & O_CREAT) {
flags[i++] = 'w';
}
if (flag & O_WRONLY) {
flags[i++] = 'w';
}
if (flag & O_APPEND) {
flags[i++] = 'a';
}
#if _WIN32
if (flag & O_BINARY) {
flags[i++] = 'b';
}
#endif
flags[i] = '\0';
splfild = Sopen_file( my_file, flags);
#ifdef undf0
fprintf(errout, "Opened file %s\n", my_file);
#endif
return splfild;
}
static int
close_file(void)
{
if (splfild == 0)
return 0;
if (Sclose(splfild) < 0)
return do_system_error(SYSTEM_ERROR,"bad close on saved state");
splfild = 0;
return 1;
}
/* stores a cell in a file */
static Int
putout(CELL l)
{
return mywrite(splfild, (char *) &l, sizeof(CELL));
}
/* stores a pointer to a cell in a file */
static Int
putcellptr(CELL *l)
{
return mywrite(splfild, (char *) &l, sizeof(CELLPOINTER));
}
/* gets a cell from a file */
static CELL
get_cell(void)
{
CELL l;
myread(splfild, (char *) &l, Unsigned(sizeof(CELL)));
return (l);
}
/* gets a cell from a file */
static CELL
get_header_cell(void)
{
CELL l;
size_t count = 0;
int n;
while (count < sizeof(CELL)) {
if ((n = Sfread(&l, 1, sizeof(CELL)-count, splfild)) < 0) {
do_system_error(PERMISSION_ERROR_INPUT_PAST_END_OF_STREAM,"failed to read saved state header");
return 0L;
}
count += n;
}
return l;
}
/* gets a pointer to cell from a file */
static CELL *
get_cellptr(void)
{
CELL *l;
if (myread(splfild, (char *) &l, Unsigned(sizeof(CELLPOINTER))) < 0)
return NULL;
return (l);
}
/*
* writes the header (at the moment YAPV*), info about what kind of saved
* set, the work size, and the space ocuppied
*/
static int
put_info(int info, int mode USES_REGS)
{
char msg[256];
sprintf(msg, "#!/bin/sh\nexec_dir=${YAPBINDIR:-%s}\nexec $exec_dir/yap $0 \"$@\"\n%cYAP-%s", YAP_BINDIR, 1, YAP_FULL_VERSION);
if (mywrite(splfild, msg, strlen(msg) + 1))
return -1;
if (putout(Unsigned(info)) < 0)
return -1;
/* say whether we just saved the heap or everything */
if (putout(mode) < 0)
return -1;
/* current state of stacks, to be used by SavedInfo */
/* space available in heap area */
if (putout(Unsigned(LOCAL_GlobalBase)-Unsigned(Yap_HeapBase)) < 0)
return -1;
/* space available for stacks */
if (putout(Unsigned(LOCAL_LocalBase)-Unsigned(LOCAL_GlobalBase)) < 0)
return -1;
/* space available for trail */
if (putout(Unsigned(LOCAL_TrailTop)-Unsigned(LOCAL_TrailBase)) < 0)
return -1;
/* Space used in heap area */
if (putout(Unsigned(HeapTop)-Unsigned(Yap_HeapBase)) < 0)
return -1;
/* Space used for local stack */
if (putout(Unsigned(LCL0)-Unsigned(ASP)) < 0)
return -1;
/* Space used for global stack */
if (putout(Unsigned(HR) - Unsigned(LOCAL_GlobalBase)) < 0)
return -1;
/* Space used for trail */
if (putout(Unsigned(TR) - Unsigned(LOCAL_TrailBase)) < 0)
return -1;
return 0;
}
static int
save_regs(int mode USES_REGS)
{
/* save all registers */
if (putout((CELL)compile_arrays) < 0)
return -1;
if (mode == DO_EVERYTHING) {
if (putcellptr((CELL *)CP) < 0)
return -1;
if (putcellptr(ENV) < 0)
return -1;
if (putcellptr(ASP) < 0)
return -1;
/* if (putout((CELL)N) < 0)
return -1; */
if (putcellptr(H0) < 0)
return -1;
if (putcellptr(LCL0) < 0)
return -1;
if (putcellptr(HR) < 0)
return -1;
if (putcellptr(HB) < 0)
return -1;
if (putcellptr((CELL *)B) < 0)
return -1;
if (putcellptr((CELL *)TR) < 0)
return -1;
if (putcellptr(YENV) < 0)
return -1;
if (putcellptr(S) < 0)
return -1;
if (putcellptr((CELL *)P) < 0)
return -1;
if (putout(CreepFlag) < 0)
return -1;
if (putout(EventFlag) < 0)
return -1;
if (putcellptr((CELL *)EX) < 0)
return -1;
#if defined(YAPOR_SBA) || defined(TABLING)
if (putcellptr(H_FZ) < 0)
return -1;
if (putcellptr((CELL *)B_FZ) < 0)
return -1;
if (putcellptr((CELL *)TR_FZ) < 0)
return -1;
#endif /* YAPOR_SBA || TABLING */
}
if (putout(CurrentModule) < 0)
return -1;
if (mode == DO_EVERYTHING) {
#ifdef COROUTINING
if (putout(LOCAL_WokenGoals) < 0)
return -1;
#endif
#ifdef DEPTH_LIMIT
if (putout(DEPTH) < 0)
return -1;
#endif
if (putout(LOCAL_GcGeneration) < 0)
return -1;
if (putout(LOCAL_GcPhase) < 0)
return -1;
if (putout(LOCAL_GcCurrentPhase) < 0)
return -1;
}
/* The operand base */
if (putcellptr(CellPtr(XREGS)) < 0)
return -1;
if (putout(which_save) < 0)
return -1;
/* Now start by saving the code */
/* the heap boundaries */
if (putcellptr(CellPtr(Yap_HeapBase)) < 0)
return -1;
if (putcellptr(CellPtr(HeapTop)) < 0)
return -1;
/* and the space it ocuppies */
if (putout(Unsigned(Yap_heap_regs->heap_used)) < 0)
return -1;
/* Then the start of the free code */
if (putcellptr(CellPtr(FreeBlocks)) < 0)
return -1;
if (putcellptr(CellPtr(AuxBase)) < 0)
return -1;
if (putcellptr(AuxSp) < 0)
return -1;
if (putcellptr(CellPtr(AuxTop)) < 0)
return -1;
if (putcellptr(CellPtr(LOCAL_ScratchPad.ptr)) < 0)
return -1;
if (putout(LOCAL_ScratchPad.sz) < 0)
return -1;
if (putout(LOCAL_ScratchPad.msz) < 0)
return -1;
if (mode == DO_EVERYTHING) {
/* put the old trail base, just in case it moves again */
if (putout(ARG1) < 0)
return -1;
if (which_save == 2) {
if (putout(ARG2) < 0)
return -1;
}
if (putcellptr(CellPtr(LOCAL_TrailBase)) < 0)
return -1;
}
return 0;
}
static int
save_code_info(void)
{
/* First the instructions */
{
op_numbers i;
OPCODE my_ops[_std_top+1];
for (i = _Ystop; i <= _std_top; ++i)
my_ops[i] = Yap_opcode(i);
if (mywrite(splfild, (char *)my_ops, sizeof(OPCODE)*(_std_top+1)) < 0)
return -1;
}
/* and the current character codes */
if (mywrite(splfild, Yap_chtype, NUMBER_OF_CHARS) < 0)
return -1;
return 0;
}
static int
save_heap(void)
{
#ifdef USE_SYSTEM_MALLOC
return -1;
#endif
int j;
/* Then save the whole heap */
Yap_ResetConsultStack();
j = Unsigned(HeapTop) - Unsigned(Yap_HeapBase);
/* store 10 more cells because of the memory manager */
if (mywrite(splfild, (char *) Yap_HeapBase, j) < 0)
return -1;
return 0;
}
static int
save_stacks(int mode USES_REGS)
{
int j;
switch (mode) {
case DO_EVERYTHING:
/* Now, go and save the state */
/* Save the local stack */
j = Unsigned(LCL0) - Unsigned(ASP);
if (mywrite(splfild, (char *) ASP, j) < 0)
return -1;
/* Save the global stack */
j = Unsigned(HR) - Unsigned(LOCAL_GlobalBase);
if (mywrite(splfild, (char *) LOCAL_GlobalBase, j) < 0)
return -1;
/* Save the trail */
j = Unsigned(TR) - Unsigned(LOCAL_TrailBase);
if (mywrite(splfild, (char *) LOCAL_TrailBase, j) < 0)
return -1;
break;
case DO_ONLY_CODE:
{
tr_fr_ptr tr_ptr = TR;
while (tr_ptr != (tr_fr_ptr)LOCAL_TrailBase) {
CELL val = TrailTerm(tr_ptr-1);
if (IsVarTerm(val)) {
CELL *d1 = VarOfTerm(val);
if (d1 < (CELL *)HeapTop) {
if (putout(val) < 0)
return -1;
}
} else if (IsPairTerm(val)) {
CELL *d1 = RepPair(val);
if (d1 < (CELL *)HeapTop) {
if (putout(val) < 0)
return -1;
}
}
tr_ptr--;
}
}
if (putcellptr(NULL) < 0)
return -1;
break;
}
return 0;
}
static int
save_crc(void)
{
/* Save a CRC */
return mywrite(splfild, end_msg, 256);
}
static Int
do_save(int mode USES_REGS) {
extern void Scleanup(void);
Term t1 = Deref(ARG1);
if (Yap_HoleSize) {
Yap_Error(SYSTEM_ERROR,MkAtomTerm(Yap_LookupAtom(LOCAL_FileNameBuf)),
"restore/1: address space has holes of size %ld, cannot save", (long int)Yap_HoleSize);
return FALSE;
}
if (!Yap_GetName(LOCAL_FileNameBuf, YAP_FILENAME_MAX, t1)) {
Yap_Error(TYPE_ERROR_LIST,t1,"save/1");
return FALSE;
}
Scleanup();
Yap_CloseStreams(TRUE);
if ((splfild = open_file(LOCAL_FileNameBuf, O_WRONLY | O_CREAT)) < 0) {
Yap_Error(SYSTEM_ERROR,MkAtomTerm(Yap_LookupAtom(LOCAL_FileNameBuf)),
"restore/1, open(%s)", strerror(errno));
return(FALSE);
}
if (put_info(FullSaved, mode PASS_REGS) < 0)
return -1;
if (save_regs(mode PASS_REGS) < 0)
return -1;
if (save_code_info() < 0)
return -1;
if (save_heap() < 0)
return -1;
if (save_stacks(mode PASS_REGS) < 0)
return -1;
if (save_crc() < 0)
return -1;
close_file();
return (TRUE);
}
/* Saves a complete prolog environment */
static Int
p_save2( USES_REGS1 )
{
Int res;
yhandle_t CurSlot = Yap_StartSlots();
Term t;
#ifdef YAPOR
if (GLOBAL_number_workers != 1) {
Yap_Error(SYSTEM_ERROR,TermNil,
"cannot perform save: more than a worker/thread running");
return(FALSE);
}
#endif /* YAPOR */
#ifdef THREADS
if (GLOBAL_NOfThreads != 1) {
Yap_Error(SYSTEM_ERROR,TermNil,
"cannot perform save: more than a worker/thread running");
return(FALSE);
}
#endif /* THREADS */
/* avoid double saves */
if (IsNonVarTerm(t = Deref(ARG2)))
return TRUE;
if (!Yap_unify(ARG2,MkIntTerm(1)))
return FALSE;
which_save = 2;
CurSlot = Yap_StartSlots();
res = do_save(DO_EVERYTHING PASS_REGS);
Yap_CloseSlots(CurSlot);
return res;
}
/* Just save the program, not the stacks */
static Int
p_save_program( USES_REGS1 )
{
which_save = 0;
return do_save(DO_ONLY_CODE PASS_REGS);
}
/* Now, to restore the saved code */
/* First check out if we are dealing with a valid file */
static int
check_header(CELL *info, CELL *ATrail, CELL *AStack, CELL *AHeap USES_REGS)
{
char pp[256];
char msg[256];
CELL hp_size, gb_size, lc_size, tr_size, mode;
int n;
/* make sure we always check if there are enough bytes */
/* skip the first line */
pp[0] = '\0';
do {
if ((n = Sfread(pp, 1, 1, splfild)) <= 0) {
do_system_error(PERMISSION_ERROR_INPUT_PAST_END_OF_STREAM,"failed to scan first line from saved state");
return FAIL_RESTORE;
}
} while (pp[0] != 1);
/* now check the version */
sprintf(msg, "YAP-%s", YAP_FULL_VERSION);
{
int count = 0, n, to_read = Unsigned(strlen(msg) + 1);
while (count < to_read) {
if ((n = Sfread(pp, 1, to_read-count, splfild)) <= 0) {
do_system_error(PERMISSION_ERROR_INPUT_PAST_END_OF_STREAM,"failed to scan version info from saved state");
return FAIL_RESTORE;
}
count += n;
}
}
if (strcmp(pp, msg) != 0) {
LOCAL_ErrorMessage = LOCAL_ErrorSay;
strncpy(LOCAL_ErrorMessage, "saved state ", MAX_ERROR_MSG_SIZE);
strncat(LOCAL_ErrorMessage, LOCAL_FileNameBuf, MAX_ERROR_MSG_SIZE-1);
strncat(LOCAL_ErrorMessage, " failed to match version ID", MAX_ERROR_MSG_SIZE-1);
LOCAL_Error_TYPE = CONSISTENCY_ERROR;
return FAIL_RESTORE;
}
/* check info on header */
/* ignore info on saved state */
*info = get_header_cell();
if (LOCAL_ErrorMessage)
return FAIL_RESTORE;
/* check the restore mode */
mode = get_header_cell();
if (LOCAL_ErrorMessage)
return FAIL_RESTORE;
if (mode != DO_EVERYTHING && mode != DO_ONLY_CODE) {
return FAIL_RESTORE;
}
/* ignore info on stacks size */
*AHeap = get_header_cell();
if (LOCAL_ErrorMessage) {
return FAIL_RESTORE;
}
*AStack = get_header_cell();
if (LOCAL_ErrorMessage) {
return FAIL_RESTORE;
}
*ATrail = get_header_cell();
if (LOCAL_ErrorMessage) {
return FAIL_RESTORE;
}
/* now, check whether we got enough enough space to load the
saved space */
hp_size = get_cell();
if (LOCAL_ErrorMessage)
return FAIL_RESTORE;
while (Yap_HeapBase != NULL &&
hp_size > Unsigned(HeapLim) - Unsigned(Yap_HeapBase)) {
if(!Yap_growheap(FALSE, hp_size, NULL)) {
return FAIL_RESTORE;
}
}
if (mode == DO_EVERYTHING) {
lc_size = get_cell();
if (LOCAL_ErrorMessage)
return FAIL_RESTORE;
gb_size=get_cell();
if (LOCAL_ErrorMessage)
return FAIL_RESTORE;
if (Yap_HeapBase != NULL && lc_size+gb_size > Unsigned(LOCAL_LocalBase) - Unsigned(LOCAL_GlobalBase)) {
if (LOCAL_ErrorMessage != NULL)
LOCAL_ErrorMessage = "could not allocate enough stack space";
return FAIL_RESTORE;
}
if (Yap_HeapBase != NULL && (tr_size = get_cell()) > Unsigned(LOCAL_TrailTop) - Unsigned(LOCAL_TrailBase)) {
if (LOCAL_ErrorMessage != NULL)
LOCAL_ErrorMessage = "could not allocate enough trail space";
return FAIL_RESTORE;
}
} else {
/* skip cell size */
get_header_cell();
if (LOCAL_ErrorMessage)
return FAIL_RESTORE;
get_header_cell();
if (LOCAL_ErrorMessage)
return FAIL_RESTORE;
get_header_cell();
if (LOCAL_ErrorMessage)
return FAIL_RESTORE;
}
return(mode);
}
/* Gets the state of the heap, and evaluates the related variables */
static int
get_heap_info(USES_REGS1)
{
LOCAL_OldHeapBase = (ADDR) get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
LOCAL_OldHeapTop = (ADDR) get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
OldHeapUsed = (Int) get_cell();
if (LOCAL_ErrorMessage)
return -1;
FreeBlocks = (BlockHeader *) get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
AuxBase = (ADDR)get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
AuxSp = get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
AuxTop = (ADDR)get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
LOCAL_ScratchPad.ptr = (ADDR)get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
LOCAL_ScratchPad.sz = get_cell();
if (LOCAL_ErrorMessage)
return -1;
LOCAL_ScratchPad.msz = get_cell();
if (LOCAL_ErrorMessage)
return -1;
LOCAL_HDiff = Unsigned(Yap_HeapBase) - Unsigned(LOCAL_OldHeapBase);
return 1;
}
/* Gets the register array */
/* Saves the old bases for the work areas */
/* and evaluates the difference from the old areas to the new ones */
static int
get_regs(int flag USES_REGS)
{
CELL *NewGlobalBase = (CELL *)LOCAL_GlobalBase;
CELL *NewLCL0 = LCL0;
CELL *OldXREGS;
/* Get regs */
compile_arrays = (int)get_cell();
if (LOCAL_ErrorMessage)
return -1;
if (flag == DO_EVERYTHING) {
CP = (yamop *)get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
ENV = get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
ASP = get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
/* N = get_cell(); */
H0 = get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
LCL0 = get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
HR = get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
HB = get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
B = (choiceptr)get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
TR = (tr_fr_ptr)get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
YENV = get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
S = get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
P = (yamop *)get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
CreepFlag = get_cell();
if (LOCAL_ErrorMessage)
return -1;
EventFlag = get_cell();
if (LOCAL_ErrorMessage)
return -1;
EX = (struct DB_TERM *)get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
#if defined(YAPOR_SBA) || defined(TABLING)
H_FZ = get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
B_FZ = (choiceptr)get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
TR_FZ = (tr_fr_ptr)get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
#endif /* YAPOR_SBA || TABLING */
}
CurrentModule = get_cell();
if (LOCAL_ErrorMessage)
return -1;
if (flag == DO_EVERYTHING) {
#ifdef COROUTINING
LOCAL_WokenGoals = get_cell();
if (LOCAL_ErrorMessage)
return -1;
#endif
#ifdef DEPTH_LIMIT
DEPTH = get_cell();
if (LOCAL_ErrorMessage)
return -1;
#endif
LOCAL_GcGeneration = get_cell();
if (LOCAL_ErrorMessage)
return -1;
LOCAL_GcPhase = get_cell();
if (LOCAL_ErrorMessage)
return -1;
LOCAL_GcCurrentPhase = get_cell();
if (LOCAL_ErrorMessage)
return -1;
}
/* Get the old bases */
OldXREGS = get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
which_save = get_cell();
if (LOCAL_ErrorMessage)
return -1;
LOCAL_XDiff = (CELL)XREGS - (CELL)OldXREGS;
if (LOCAL_ErrorMessage)
return -1;
if (get_heap_info( PASS_REGS1 ) < 0)
return -1;
if (flag == DO_EVERYTHING) {
ARG1 = get_cell();
if (LOCAL_ErrorMessage)
return -1;
if (which_save == 2) {
ARG2 = get_cell();
if (LOCAL_ErrorMessage)
return -1;
}
/* get old trail base */
LOCAL_OldTrailBase = (ADDR)get_cellptr();
if (LOCAL_ErrorMessage)
return -1;
/* Save the old register where we can easily access them */
LOCAL_OldASP = ASP;
LOCAL_OldLCL0 = LCL0;
LOCAL_OldGlobalBase = (CELL *)LOCAL_GlobalBase;
LOCAL_OldH = HR;
LOCAL_OldTR = TR;
LOCAL_GDiff = Unsigned(NewGlobalBase) - Unsigned(LOCAL_GlobalBase);
LOCAL_GDiff0 = 0;
LOCAL_LDiff = Unsigned(NewLCL0) - Unsigned(LCL0);
LOCAL_TrDiff = LOCAL_LDiff;
LOCAL_GlobalBase = (ADDR)NewGlobalBase;
LCL0 = NewLCL0;
}
return 1;
}
/* Get the old opcodes and place them in a hash table */
static int
get_insts(OPCODE old_ops[])
{
return myread(splfild, (char *)old_ops, sizeof(OPCODE)*(_std_top+1));
}
/* Get the old atoms hash table */
static int
get_hash(void)
{
return myread(splfild, Yap_chtype , NUMBER_OF_CHARS);
}
/* Copy all of the old code to the new Heap */
static int
CopyCode( USES_REGS1 )
{
if (myread(splfild, (char *) Yap_HeapBase, (Unsigned(LOCAL_OldHeapTop) - Unsigned(LOCAL_OldHeapBase))) < 0) {
return -1;
}
return 1;
}
/* Copy the local and global stack and also the trail to their new home */
/* In REGS we still have nonadjusted values !! */
static int
CopyStacks( USES_REGS1 )
{
Int j;
char *NewASP;
j = Unsigned(LOCAL_OldLCL0) - Unsigned(ASP);
NewASP = (char *) (Unsigned(ASP) + (Unsigned(LCL0) - Unsigned(LOCAL_OldLCL0)));
if (myread(splfild, (char *) NewASP, j) < 0)
return -1;
j = Unsigned(HR) - Unsigned(LOCAL_OldGlobalBase);
if (myread(splfild, (char *) LOCAL_GlobalBase, j) < 0)
return -1;
j = Unsigned(TR) - Unsigned(LOCAL_OldTrailBase);
if (myread(splfild, LOCAL_TrailBase, j))
return -1;
return 1;
}
/* Copy the local and global stack and also the trail to their new home */
/* In REGS we still have nonadjusted values !! */
static int
CopyTrailEntries( USES_REGS1 )
{
CELL entry, *Entries;
Entries = (CELL *)LOCAL_TrailBase;
do {
*Entries++ = entry = get_cell();
if (LOCAL_ErrorMessage)
return -1;
} while ((CODEADDR)entry != NULL);
return 1;
}
/* get things which are saved in the file */
static int
get_coded(int flag, OPCODE old_ops[] USES_REGS)
{
char my_end_msg[256];
if (get_regs(flag PASS_REGS) < 0)
return -1;
if (get_insts(old_ops) < 0)
return -1;
if (get_hash() < 0)
return -1;
if (CopyCode( PASS_REGS1 ) < 0)
return -1;
switch (flag) {
case DO_EVERYTHING:
if (CopyStacks( PASS_REGS1 ) < 0)
return -1;
break;
case DO_ONLY_CODE:
if (CopyTrailEntries( PASS_REGS1 ) < 0)
return -1;
break;
}
/* Check CRC */
if (myread(splfild, my_end_msg, 256) < 0)
return -1;
if (strcmp(end_msg,my_end_msg) != 0) {
LOCAL_ErrorMessage = "bad trailing CRC in saved state";
return -1;
}
return 1;
}
/* restore some heap registers */
static void
restore_heap_regs( USES_REGS1 )
{
if (HeapTop) {
HeapTop = AddrAdjust(HeapTop);
*((YAP_SEG_SIZE *) HeapTop) = InUseFlag;
}
HeapMax = Yap_heap_regs->heap_used = OldHeapUsed;
HeapLim = LOCAL_GlobalBase;
}
/* adjust abstract machine registers */
static void
restore_regs(int flag USES_REGS)
{
restore_heap_regs( PASS_REGS1 );
if (CurrentModule) {
CurrentModule = AtomTermAdjust(CurrentModule);;
}
if (flag == DO_EVERYTHING) {
CP = PtoOpAdjust(CP);
ENV = PtoLocAdjust(ENV);
ASP = PtoLocAdjust(ASP);
HR = PtoGloAdjust(HR);
B = (choiceptr)PtoLocAdjust(CellPtr(B));
TR = PtoTRAdjust(TR);
P = PtoOpAdjust(P);
HB = PtoLocAdjust(HB);
YENV = PtoLocAdjust(YENV);
S = PtoGloAdjust(S);
if (EX) {
EX = DBTermAdjust(EX);
RestoreDBTerm(EX, TRUE PASS_REGS);
}
LOCAL_WokenGoals = AbsAppl(PtoGloAdjust(RepAppl(LOCAL_WokenGoals)));
}
}
static void
recompute_mask(DBRef dbr)
{
if (dbr->Flags & DBNoVars) {
dbr->Mask = Yap_EvalMasks((Term) dbr->DBT.Entry, &(dbr->Key));
} else if (dbr->Flags & DBComplex) {
/* This is quite nasty, we want to recalculate the mask but
we don't want to rebuild the whole term. We'll just build whatever we
need to recompute the mask.
*/
CELL *x = (CELL *)HeapTop, *tp;
unsigned int Arity, i;
Term out;
char *tbase = CharP(dbr->DBT.Contents-1);
if (IsPairTerm(dbr->DBT.Entry)) {
out = AbsPair(x);
Arity = 2;
tp = (CELL *)(tbase + (CELL) RepPair(dbr->DBT.Entry));
} else {
Functor f;
tp = (CELL *)(tbase + (CELL) RepAppl(dbr->DBT.Entry));
f = (Functor)(*tp++);
out = AbsAppl(x);
Arity = ArityOfFunctor(f);
*x++ = (CELL)f;
if (Arity > 3) Arity = 3;
}
for (i = 0; i < Arity; i++) {
register Term tw = *tp++;
if (IsVarTerm(tw)) {
RESET_VARIABLE(x);
} else if (IsApplTerm(tw)) {
/* just fetch the functor from where it is in the data-base.
This guarantees we have access to references and friends. */
CELL offset = (CELL)RepAppl(tw);
if (offset > dbr->DBT.NOfCells*sizeof(CELL))
*x = tw;
else
*x = AbsAppl((CELL *)(tbase + offset));
} else if (IsAtomicTerm(tw)) {
*x = tw;
} else if (IsPairTerm(tw)) {
*x = AbsPair(x);
}
x++;
}
dbr->Mask = Yap_EvalMasks(out, &(dbr->Key));
}
}
#define HASH_SHIFT 6
/*
* This is used to make an hash table correct, after displacing its elements,
* HCEnd should point to an area of free space, usually in the heap. The
* routine is very dependent on the hash function used, and it destroys the
* previous "hit" order
*/
static void
rehash(CELL *oldcode, int NOfE, int KindOfEntries USES_REGS)
{
register CELL *savep, *basep;
CELL *oldp = oldcode;
int TableSize = NOfE - 1, NOfEntries;
register int i;
int hash;
CELL WorkTerm, failplace = 0;
CELL *Base = oldcode;
if (LOCAL_HDiff == 0)
return;
basep = HR;
if (HR + (NOfE*2) > ASP) {
basep = (CELL *)TR;
if (basep + (NOfE*2) > (CELL *)LOCAL_TrailTop) {
if (!Yap_growtrail((ADDR)(basep + (NOfE*2))-LOCAL_TrailTop, TRUE)) {
Yap_Error(OUT_OF_TRAIL_ERROR, TermNil,
"not enough space to restore hash tables for indexing");
Yap_exit(1);
}
}
}
for (i = 0; i < NOfE; ++i) {
if (*oldp == 0) {
failplace = oldp[1];
break;
}
oldp += 2;
}
savep = basep;
oldp = oldcode;
for (i = 0; i < NOfE; ++i) {
if (*oldp != 0) {
savep[0] = oldp[0];
savep[1] = oldp[1];
oldp[0] = 0;
oldp[1] = failplace;
savep += 2;
}
oldp += 2;
}
NOfEntries = (savep - basep)/2;
savep = basep;
for (i = 0; i < NOfEntries; ++i) {
register Int d;
CELL *hentry;
WorkTerm = savep[i*2];
hash = (Unsigned(WorkTerm) >> HASH_SHIFT) & TableSize;
hentry = Base + hash * 2;
d = TableSize & (Unsigned(WorkTerm) | 1);
while (*hentry) {
#ifdef DEBUG
#ifdef CLASHES
++clashes;
#endif /* CLASHES */
#endif /* DEBUG */
hash = (hash + d) & TableSize;
hentry = Base + hash * 2;
}
hentry[0] = WorkTerm;
hentry[1] = savep[i*2+1];
}
}
static void
RestoreSWIHash(void)
{
Yap_InitSWIHash();
}
#include "rheap.h"
/* restore the atom entries which are invisible for the user */
static void
RestoreIOStructures(void)
{
Yap_InitStdStreams();
}
static void
RestoreFreeSpace( USES_REGS1 )
{
#if USE_DL_MALLOC
Yap_av = (struct malloc_state *)AddrAdjust((ADDR)Yap_av);
Yap_RestoreDLMalloc();
if (AuxSp != NULL) {
if (AuxBase < LOCAL_OldHeapBase || AuxBase > LOCAL_OldHeapTop) {
AuxSp = NULL;
AuxBase = NULL;
AuxTop = NULL;
} else {
AuxSp = PtoHeapCellAdjust(AuxSp);
AuxBase = AddrAdjust(AuxBase);
AuxTop = AddrAdjust(AuxTop);
LOCAL_ScratchPad.ptr = AddrAdjust(LOCAL_ScratchPad.ptr);
}
}
#else
/* restores the list of free space, with its curious structure */
BlockHeader *bpt, *bsz;
if (FreeBlocks != NULL)
FreeBlocks = BlockAdjust(FreeBlocks);
bpt = FreeBlocks;
if (AuxSp != NULL)
AuxSp = CellPtoHeapAdjust(AuxSp);
if (AuxTop != NULL)
AuxTop = AddrAdjust(AuxTop);
while (bpt != NULL) {
if (bpt->b_next != NULL) {
bsz = bpt->b_next = BlockAdjust(bpt->b_next);
while (bsz != NULL) {
if (bsz->b_next_size != NULL)
bsz->b_next_size = BlockAdjust(bsz->b_next_size);
if (bsz->b_next != NULL)
bsz->b_next = BlockAdjust(bsz->b_next);
bsz = bsz->b_next;
}
}
if (bpt->b_next_size != NULL)
bpt->b_next_size = BlockAdjust(bpt->b_next_size);
bpt = bpt->b_next_size;
}
*((YAP_SEG_SIZE *) HeapTop) = InUseFlag;
#endif
}
static void
RestoreAtomList(Atom atm USES_REGS)
{
AtomEntry *at;
at = RepAtom(atm);
if (EndOfPAEntr(at))
return;
do {
RestoreAtom(at PASS_REGS);
at = RepAtom(at->NextOfAE);
} while (!EndOfPAEntr(at));
}
static void
RestoreHashPreds( USES_REGS1 )
{
UInt size = PredHashTableSize;
bool malloced = FALSE;
PredEntry **np;
UInt i;
PredEntry **oldp = PredHash;
np = (PredEntry **) Yap_AllocAtomSpace(sizeof(PredEntry *)*size);
if (!np) {
if (!(np = (PredEntry **) malloc(sizeof(PredEntry *)*size))) {
Yap_Error(FATAL_ERROR,TermNil,"Could not allocate space for pred table");
return;
}
malloced = TRUE;
}
for (i = 0; i < size; i++) {
np[i] = NULL;
}
for (i = 0; i < PredHashTableSize; i++) {
PredEntry *p = oldp[i];
if (p)
p = PredEntryAdjust(p);
while (p) {
Prop nextp;
UInt hsh;
if (p->NextOfPE)
p->NextOfPE = PropAdjust(p->NextOfPE);
nextp = p->NextOfPE;
CleanCode(p PASS_REGS);
hsh = PRED_HASH(p->FunctorOfPred, p->ModuleOfPred, size);
p->NextOfPE = AbsPredProp(np[hsh]);
np[hsh] = p;
p = RepPredProp(nextp);
}
}
for (i = 0; i < size; i++) {
PredHash[i] = np[i];
}
if (malloced)
free((ADDR)np);
else
Yap_FreeAtomSpace((ADDR)np);
}
/*
* This is the really tough part, to restore the whole of the heap
*/
static void
restore_heap(void)
{
restore_codes();
RestoreIOStructures();
}
#ifdef DEBUG_RESTORE3
static void
ShowEntries(pp)
PropEntry *pp;
{
while (!EndOfPAEntr(pp)) {
fprintf(GLOBAL_stderr,"Estou a ver a prop %x em %x\n", pp->KindOfPE, pp);
pp = RepProp(pp->NextOfPE);
}
}
static void
ShowAtoms()
{
AtomHashEntry *HashPtr = HashChain;
register int i;
for (i = 0; i < AtomHashTableSize; ++i) {
if (HashPtr->Entry != NIL) {
AtomEntry *at;
at = RepAtom(HashPtr->Entry);
do {
fprintf(GLOBAL_stderr,"Passei ao %s em %x\n", at->StrOfAE, at);
ShowEntries(RepProp(at->PropsOfAE));
} while (!EndOfPAEntr(at = RepAtom(at->NextOfAE)));
}
HashPtr++;
}
HashPtr = WideHashChain;
for (i = 0; i < WideAtomHashTableSize; ++i) {
if (HashPtr->Entry != NIL) {
AtomEntry *at;
at = RepAtom(HashPtr->Entry);
do {
fprintf(GLOBAL_stderr,"Passei ao %s em %x\n", at->StrOfAE, at);
ShowEntries(RepProp(at->PropsOfAE));
} while (!EndOfPAEntr(at = RepAtom(at->NextOfAE)));
}
HashPtr++;
}
}
#endif /* DEBUG_RESTORE3 */
#include <stdio.h>
static int
commit_to_saved_state(char *s, CELL *Astate, CELL *ATrail, CELL *AStack, CELL *AHeap) {
CACHE_REGS
int mode;
if ((mode = check_header(Astate,ATrail,AStack,AHeap PASS_REGS)) == FAIL_RESTORE)
return(FAIL_RESTORE);
LOCAL_PrologMode = BootMode;
if (Yap_HeapBase) {
extern void Scleanup(void);
if (!yap_flags[HALT_AFTER_CONSULT_FLAG] && !yap_flags[QUIET_MODE_FLAG]) {
Yap_TrueFileName(s,LOCAL_FileNameBuf2, YAP_FILENAME_MAX);
fprintf(stderr, "%% Restoring file %s\n", LOCAL_FileNameBuf2);
}
Scleanup();
Yap_CloseStreams(TRUE);
}
#ifdef DEBUG_RESTORE4
/*
* This should be another file, like the log file
*/
errout = GLOBAL_stderr;
#endif
return mode;
}
static void
cat_file_name(char *s, const char *prefix, char *name, unsigned int max_length)
{
strncpy(s, prefix, max_length);
#if _MSC_VER || defined(__MINGW32__)
strncat(s,"\\", max_length);
#else
strncat(s,"/", max_length);
#endif
strncat(s, name, max_length-1);
}
static int try_open(char *inpf, CELL *Astate, CELL *ATrail, CELL *AStack, CELL *AHeap, char *buf, IOSTREAM **streamp) {
int mode;
if (streamp) {
if ((*streamp = Sopen_file(inpf, "rb"))) {
return DO_ONLY_CODE;
}
return FAIL_RESTORE;
}
if ((splfild = open_file(inpf, O_RDONLY)) < 0) {
return FAIL_RESTORE;
}
if (buf[0] == '\0')
strncpy(buf, inpf, YAP_FILENAME_MAX);
if ((mode = commit_to_saved_state(inpf,Astate,ATrail,AStack,AHeap)) != FAIL_RESTORE) {
CACHE_REGS
LOCAL_ErrorMessage = NULL;
return mode;
}
return mode;
}
static int
OpenRestore(char *inpf, char *YapLibDir, CELL *Astate, CELL *ATrail, CELL *AStack, CELL *AHeap, IOSTREAM **streamp)
{
CACHE_REGS
int mode = FAIL_RESTORE;
char save_buffer[YAP_FILENAME_MAX+1];
#if __ANDROID__
if (!inpf)
inpf = YAPSTARTUP;
#endif
save_buffer[0] = '\0';
// LOCAL_ErrorMessage = NULL;
if (inpf == NULL) {
inpf = StartUpFile;
}
/* careful it starts from the root */
if (inpf[0] != '/') {
#if __simplescalar__
/* does not implement getcwd */
strncpy(LOCAL_FileNameBuf,GLOBAL_pwd,YAP_FILENAME_MAX);
#elif HAVE_GETCWD
if (getcwd (LOCAL_FileNameBuf, YAP_FILENAME_MAX) == NULL)
LOCAL_FileNameBuf[0] = '\0';
#else
if (getwd (LOCAL_FileNameBuf) == NULL)
LOCAL_FileNameBuf[0] = '\0';
#endif
strncat(LOCAL_FileNameBuf, "/", YAP_FILENAME_MAX-1);
strncat(LOCAL_FileNameBuf, inpf, YAP_FILENAME_MAX-1);
} else {
strncpy(LOCAL_FileNameBuf, inpf, YAP_FILENAME_MAX-1);
}
if (inpf != NULL &&
!((splfild = open_file(inpf, O_RDONLY)) < 0))
{
if ((mode = try_open(inpf,Astate,ATrail,AStack,AHeap,save_buffer,streamp)) != FAIL_RESTORE) {
return mode;
}
}
if (!Yap_dir_separator(inpf[0]) && !Yap_volume_header(inpf)) {
/*
we have a relative path for the file, try to do somewhat better
using YAPLIBDIR or friends.
*/
if (YapLibDir != NULL) {
cat_file_name(LOCAL_FileNameBuf, Yap_LibDir, inpf, YAP_FILENAME_MAX);
if ((mode = try_open(LOCAL_FileNameBuf,Astate,ATrail,AStack,AHeap,save_buffer,streamp)) != FAIL_RESTORE) {
return mode;
}
} else {
if ((mode = try_open(LOCAL_FileNameBuf,Astate,ATrail,AStack,AHeap,save_buffer,streamp)) != FAIL_RESTORE) {
return mode;
}
}
#if HAVE_GETENV
{
const char *yap_env = getenv("YAPLIBDIR");
if (yap_env != NULL) {
cat_file_name(LOCAL_FileNameBuf, yap_env, inpf, YAP_FILENAME_MAX);
if ((mode = try_open(LOCAL_FileNameBuf,Astate,ATrail,AStack,AHeap,save_buffer,streamp)) != FAIL_RESTORE) {
return mode;
}
}
}
#endif
if (YAP_LIBDIR != NULL) {
cat_file_name(LOCAL_FileNameBuf, YAP_LIBDIR, inpf, YAP_FILENAME_MAX);
if (!((splfild = open_file(LOCAL_FileNameBuf, O_RDONLY)) < 0)) {
if ((mode = try_open(LOCAL_FileNameBuf,Astate,ATrail,AStack,AHeap,save_buffer,streamp)) != FAIL_RESTORE) {
return mode;
}
}
}
}
#if __WINDOWS__
if ((inpf = Yap_RegistryGetString("startup"))) {
if (!((splfild = Sopen_file(inpf, "r")) < 0)) {
if ((mode = try_open(inpf,Astate,ATrail,AStack,AHeap,save_buffer,streamp)) != FAIL_RESTORE) {
return mode;
}
}
}
{
DWORD fatts;
int buflen;
char *pt;
/* try to get it from current executable */
if ((fatts = GetFileAttributes(LOCAL_FileNameBuf)) == 0xFFFFFFFFL ||
!(fatts & FILE_ATTRIBUTE_DIRECTORY)) {
/* couldn't find it where it was supposed to be,
let's try using the executable */
if (!GetModuleFileName( NULL, LOCAL_FileNameBuf, YAP_FILENAME_MAX)) {
/* do nothing */
goto end;
}
buflen = strlen(LOCAL_FileNameBuf);
pt = LOCAL_FileNameBuf+buflen;
while (*--pt != '\\') {
/* skip executable */
if (pt == LOCAL_FileNameBuf) {
/* do nothing */
goto end;
}
}
while (*--pt != '\\') {
/* skip parent directory "bin\\" */
if (pt == LOCAL_FileNameBuf) {
goto end;
}
}
/* now, this is a possible location for the ROOT_DIR, let's look for a share directory here */
pt[1] = '\0';
strncat(LOCAL_FileNameBuf,"lib/Yap/startup.yss",YAP_FILENAME_MAX);
}
if ((mode = try_open(LOCAL_FileNameBuf,Astate,ATrail,AStack,AHeap,save_buffer,streamp)) != FAIL_RESTORE) {
return mode;
}
}
end:
#endif
/* try to open from current directory */
/* could not open file */
if (LOCAL_ErrorMessage == NULL) {
if (save_buffer[0]) {
strncpy(LOCAL_FileNameBuf, save_buffer, YAP_FILENAME_MAX-1);
do_system_error(PERMISSION_ERROR_OPEN_SOURCE_SINK,"incorrect saved state");
} else {
strncpy(LOCAL_FileNameBuf, inpf, YAP_FILENAME_MAX-1);
do_system_error(PERMISSION_ERROR_OPEN_SOURCE_SINK,"could not open saved state");
}
}
return FAIL_RESTORE;
}
IOSTREAM *
Yap_OpenRestore(char *inpf, char *YapLibDir)
{
IOSTREAM *stream = NULL;
OpenRestore(inpf, YapLibDir, NULL, NULL, NULL, NULL, &stream);
return stream;
}
static void
CloseRestore(void)
{
CACHE_REGS
#ifdef DEBUG_RESTORE3
ShowAtoms();
#endif
close_file();
LOCAL_PrologMode = UserMode;
}
#if !defined(_WIN32)
static int
check_opcodes(OPCODE old_ops[])
{
#if USE_THREADED_CODE
bool have_shifted = FALSE;
op_numbers op = _Ystop;
for (op = _Ystop; op < _std_top; op++) {
if (Yap_opcode(op) != old_ops[op]) {
have_shifted = TRUE;
break;
}
}
return have_shifted;
#else
/* be conservative */
return TRUE;
#endif
}
#endif
static void
RestoreHeap(OPCODE old_ops[] USES_REGS)
{
bool heap_moved = (LOCAL_OldHeapBase != Yap_HeapBase ||
LOCAL_XDiff), opcodes_moved;
Term mod = CurrentModule;
CurrentModule = PROLOG_MODULE;
#if defined(_WIN32)
/* It seems that under WIN32 opcodes may not have moved but the
remaining code may have bmoved */
opcodes_moved = TRUE;
#else
opcodes_moved = check_opcodes(old_ops);
#endif
/* opcodes_moved has side-effects and should be tried first */
if (heap_moved) {
opcodes_moved = TRUE;
RestoreFreeSpace( PASS_REGS1 );
}
if (heap_moved || opcodes_moved) {
restore_heap();
}
/* This must be done after restore_heap */
Yap_InitAbsmi();
if (opcodes_moved) {
Yap_InitCPreds();
Yap_InitBackCPreds();
}
if (!(Yap_ReInitConstExps() &&
Yap_ReInitUnaryExps() &&
Yap_ReInitBinaryExps())) {
Yap_Error(SYSTEM_ERROR, TermNil, "arithmetic operator not in saved state");
}
#ifdef DEBUG_RESTORE1
fprintf(errout, "phase 1 done\n");
#endif
CurrentModule = mod;
}
/*
* This function is called to know about the parameters of the last saved
* state
*/
int
Yap_SavedInfo(char *FileName, char *YapLibDir, CELL *ATrail, CELL *AStack, CELL *AHeap)
{
return DO_ONLY_CODE;
CELL MyTrail, MyStack, MyHeap, MyState;
int mode;
mode = OpenRestore(FileName, YapLibDir, &MyState, &MyTrail, &MyStack, &MyHeap, NULL);
if (mode == FAIL_RESTORE) {
return -1;
}
close_file();
if (! *AHeap)
*AHeap = MyHeap / 1024;
if (mode != DO_ONLY_CODE && *AStack)
*AStack = MyStack / 1024;
if (mode != DO_ONLY_CODE && *ATrail)
*ATrail = MyTrail / 1024;
return (MyState);
}
static void
UnmarkTrEntries( USES_REGS1 )
{
CELL entry, *Entries;
/* initialise a choice point */
B = (choiceptr)LCL0;
B--;
B->cp_ap = NOCODE;
Entries = (CELL *)LOCAL_TrailBase;
while ((entry = *Entries++) != (CELL)NULL) {
if (!IsVarTerm(entry)) {
if(IsPairTerm(entry)) {
CELL *ent = CellPtoHeapAdjust(RepPair(entry));
register CELL flags;
flags = *ent;
ResetFlag(InUseMask, flags);
*ent = flags;
if (FlagOn((DirtyMask|ErasedMask), flags)) {
if (FlagOn(DBClMask, flags)) {
Yap_ErDBE(DBStructFlagsToDBStruct(ent));
} else {
if (flags & LogUpdMask) {
if (flags & IndexMask) {
if (FlagOn(ErasedMask, flags))
Yap_ErLogUpdIndex(ClauseFlagsToLogUpdIndex(ent));
else
Yap_CleanUpIndex(ClauseFlagsToLogUpdIndex(ent));
} else {
Yap_ErLogUpdCl(ClauseFlagsToLogUpdClause(ent));
}
} else {
Yap_ErCl(ClauseFlagsToDynamicClause(ent));
}
}
}
#ifdef MULTI_ASSIGNMENT_VARIABLES
} else /* if (IsApplTerm(d1)) */ {
Entries += 2;
#endif
}
}
}
B = NULL;
}
int in_limbo = FALSE;
/* cleanup any records we had in the saved state. They are now inaccessible */
static void
FreeRecords(void) {
struct record_list *ptr;
ptr = Yap_Records;
Yap_Records = NULL;
while (ptr) {
struct record_list *optr = ptr;
Yap_ReleaseTermFromDB(ptr->dbrecord);
ptr = ptr->next_rec;
Yap_FreeCodeSpace((void *)optr);
}
}
/*
* This function is called when wanting only to restore the heap and
* associated registers
*/
static int
Restore(char *s, char *lib_dir USES_REGS)
{
int restore_mode;
OPCODE old_ops[_std_top+1];
CELL MyTrail, MyStack, MyHeap, MyState;
if ((restore_mode = OpenRestore(s, lib_dir, &MyState, &MyTrail, &MyStack, &MyHeap, NULL)) == FAIL_RESTORE)
return(FALSE);
Yap_ShutdownLoadForeign();
in_limbo = TRUE;
if (get_coded(restore_mode, old_ops PASS_REGS) < 0)
return FAIL_RESTORE;
restore_regs(restore_mode PASS_REGS);
in_limbo = FALSE;
/*#endif*/
RestoreHeap(old_ops PASS_REGS);
switch(restore_mode) {
case DO_EVERYTHING:
if (LOCAL_OldHeapBase != Yap_HeapBase ||
LOCAL_OldLCL0 != LCL0 ||
LOCAL_OldGlobalBase != (CELL *)LOCAL_GlobalBase ||
LOCAL_OldTrailBase != LOCAL_TrailBase) {
Yap_AdjustStacksAndTrail();
if (which_save == 2) {
Yap_AdjustRegs(2);
} else {
Yap_AdjustRegs(1);
}
break;
#ifdef DEBUG_RESTORE2
fprintf(errout, "phase 2 done\n");
#endif
}
break;
case DO_ONLY_CODE:
UnmarkTrEntries( PASS_REGS1 );
Yap_InitYaamRegs( 0 );
break;
}
Yap_ReOpenLoadForeign();
FreeRecords();
/* restart IO */
initIO();
/* reset time */
Yap_ReInitWallTime();
#if USE_DL_MALLOC || USE_SYSTEM_MALLOC
if (!AuxSp) {
Yap_InitPreAllocCodeSpace( 0 );
}
#endif
CloseRestore();
if (which_save == 2) {
Yap_unify(ARG2, MkIntTerm(0));
}
return restore_mode;
}
int
Yap_SavedStateRestore(char *s, char *lib_dir)
{
CACHE_REGS
return Restore(s, lib_dir PASS_REGS);
}
static Int
p_restore( USES_REGS1 )
{
int mode;
char s[YAP_FILENAME_MAX+1];
Term t1 = Deref(ARG1);
#ifdef YAPOR
if (GLOBAL_number_workers != 1) {
Yap_Error(SYSTEM_ERROR,TermNil,"cannot perform save: more than a worker/thread running");
return(FALSE);
}
#endif /* YAPOR */
#ifdef THREADS
if (GLOBAL_NOfThreads != 1) {
Yap_Error(SYSTEM_ERROR,TermNil,"cannot perform save: more than a worker/thread running");
return(FALSE);
}
#endif /* THREADS */
if (!Yap_GetName(s, YAP_FILENAME_MAX, t1)) {
Yap_Error(TYPE_ERROR_LIST,t1,"restore/1");
return(FALSE);
}
if ((mode = Restore(s, NULL PASS_REGS)) == DO_ONLY_CODE) {
Yap_RestartYap( 3 );
}
return(mode != FAIL_RESTORE);
}
void
Yap_InitSavePreds(void)
{
Yap_InitCPred("$save", 2, p_save2, SyncPredFlag);
Yap_InitCPred("$save_program", 1, p_save_program, SyncPredFlag);
Yap_InitCPred("$restore", 1, p_restore, SyncPredFlag);
}
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