a7f550d667
Fix thread support (at least don't deadlock with oneself) small fixes for coroutining predicates force Yap to recover space in arrays of dbrefs use private predicates in debugger. git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1084 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
1490 lines
36 KiB
C
1490 lines
36 KiB
C
/*************************************************************************
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* *
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* YAP Prolog *
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* *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: save.c *
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* Last rev: *
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* mods: *
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* comments: saving and restoring a Prolog computation *
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* *
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*************************************************************************/
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#ifdef SCCS
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static char SccsId[] = "@(#)save.c 1.3 3/15/90";
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#endif
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#if _MSC_VER || defined(__MINGW32__)
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#include <windows.h>
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#endif
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#include "absmi.h"
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#include "alloc.h"
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#include "yapio.h"
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#include "sshift.h"
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#include "Foreign.h"
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#if HAVE_STRING_H
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#include <string.h>
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#endif
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#if !HAVE_STRNCAT
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#define strncat(X,Y,Z) strcat(X,Y)
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#endif
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#if !HAVE_STRNCPY
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#define strncpy(X,Y,Z) strcpy(X,Y)
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#endif
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#if HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#include "iopreds.h"
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/********* hack for accesing several kinds of terms. Should be cleaned **/
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static char StartUpFile[] = "startup";
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static char end_msg[256] ="*** End of YAP saved state *****";
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#ifdef DEBUG
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/*
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*
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#FOR DEBUGGING define DEBUG_RESTORE0 to check the file stuff,
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#define DEBUG_RESTORE1 to see if it is able to prepare the chain,
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#define DEBUG_RESTORE2 to see how things are going,
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#define DEBUG_RESTORE3 to check if the atom chain is still a working chain,
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* define DEBUG_RESTORE4 if you want to set the output for some
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* particular file,
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* define DEBUG_RESTORE5 if you want to see how the stacks are being
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* cleaned up,
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* define DEBUG_RESTORE6 if you want to follow the execution in
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*
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* Also a file is defined where you can write things, by default stderr
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*
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* Good Luck
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*/
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#endif
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STATIC_PROTO(void myread, (int, char *, Int));
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STATIC_PROTO(void mywrite, (int, char *, Int));
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STATIC_PROTO(int open_file, (char *, int));
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STATIC_PROTO(void close_file, (void));
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STATIC_PROTO(void putout, (CELL));
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STATIC_PROTO(void putcellptr, (CELL *));
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STATIC_PROTO(CELL get_cell, (void));
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STATIC_PROTO(CELL *get_cellptr, ( /* CELL * */ void));
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STATIC_PROTO(void put_info, (int, int));
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STATIC_PROTO(void save_regs, (int));
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STATIC_PROTO(void save_code_info, (void));
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STATIC_PROTO(void save_heap, (void));
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STATIC_PROTO(void save_stacks, (int));
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STATIC_PROTO(void save_crc, (void));
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STATIC_PROTO(Int do_save, (int));
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STATIC_PROTO(Int p_save, (void));
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STATIC_PROTO(Int p_save_program, (void));
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STATIC_PROTO(int check_header, (CELL *, CELL *, CELL *, CELL *));
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STATIC_PROTO(void get_heap_info, (void));
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STATIC_PROTO(void get_regs, (int));
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STATIC_PROTO(void get_insts, (OPCODE []));
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STATIC_PROTO(void get_hash, (void));
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STATIC_PROTO(void CopyCode, (void));
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STATIC_PROTO(void CopyStacks, (void));
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STATIC_PROTO(void get_coded, (int, OPCODE []));
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STATIC_PROTO(void restore_codes, (void));
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STATIC_PROTO(Term AdjustDBTerm, (Term, Term *));
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STATIC_PROTO(void RestoreDB, (DBEntry *));
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STATIC_PROTO(void CleanClauses, (yamop *, yamop *,PredEntry *));
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STATIC_PROTO(void rehash, (CELL *, int, int));
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STATIC_PROTO(void CleanCode, (PredEntry *));
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STATIC_PROTO(void RestoreEntries, (PropEntry *));
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STATIC_PROTO(void RestoreInvisibleAtoms, (void));
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STATIC_PROTO(void RestoreFreeSpace, (void));
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STATIC_PROTO(void restore_heap, (void));
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#ifdef DEBUG_RESTORE3
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STATIC_PROTO(void ShowAtoms, (void));
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STATIC_PROTO(void ShowEntries, (PropEntry *));
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#endif
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STATIC_PROTO(int OpenRestore, (char *, char *, CELL *, CELL *, CELL *, CELL *));
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STATIC_PROTO(void CloseRestore, (void));
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STATIC_PROTO(int check_opcodes, (OPCODE []));
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STATIC_PROTO(void RestoreHeap, (OPCODE []));
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STATIC_PROTO(Int p_restore, (void));
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STATIC_PROTO(void restore_heap_regs, (void));
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STATIC_PROTO(void restore_regs, (int));
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#ifdef MACYAP
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STATIC_PROTO(void NewFileInfo, (long, long));
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extern int DefVol;
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#endif
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#if HAVE_IO_H
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#include <io.h>
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#endif
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#ifdef LIGHT
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#include <unix.h>
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#include <strings.h>
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void
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LightBug(char *);
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static void
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LightBug(s)
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char *s;
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{
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}
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#endif /* LIGHT */
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#if SHORT_INTS
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#ifdef M_WILLIAMS
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#include <fcntl.h>
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#endif
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static void
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myread(int fd, char *buff, Int len)
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{
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while (len > 16000) {
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int nchars = read(fd, buff, 16000);
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if (nchars <= 0)
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Yap_Error(FATAL_ERROR,TermNil,"bad saved state, system corrupted");
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len -= 16000;
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buff += 16000;
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}
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read(fd, buff, (unsigned) len);
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}
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static void
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mywrite(int fd, char *buff, Int len)
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{
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while (len > 16000) {
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write(fd, buff, 16000);
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len -= 16000;
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buff += 16000;
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}
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write(fd, buff, (unsigned) len);
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}
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#else /* SHORT_INTS */
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inline static
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void myread(int fd, char *buffer, Int len) {
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int nread;
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while (len > 0) {
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nread = read(fd, buffer, (int)len);
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if (nread < 1) {
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Yap_Error(FATAL_ERROR,TermNil,"bad saved state, system corrupted");
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}
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buffer += nread;
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len -= nread;
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}
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}
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inline static
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void mywrite(int fd, char *buff, Int len) {
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Int nwritten;
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while (len > 0) {
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nwritten = (Int)write(fd, buff, (int)len);
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if (nwritten == -1) {
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Yap_Error(SYSTEM_ERROR,TermNil,"write error while saving");
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}
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buff += nwritten;
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len -= nwritten;
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}
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}
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#endif /* SHORT_INTS */
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#define FullSaved 1
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/* Where the code was before */
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typedef CELL *CELLPOINTER;
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static int splfild = 0;
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#ifdef DEBUG
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#ifdef DEBUG_RESTORE4
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static FILE *errout;
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#else
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#define errout Yap_stderr
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#endif
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#endif /* DEBUG */
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static Int OldHeapUsed;
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static CELL which_save;
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/* Open a file to read or to write */
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static int
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open_file(char *my_file, int flag)
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{
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int splfild;
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#ifdef M_WILLIAMS
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if (flag & O_CREAT)
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splfild = creat(my_file, flag);
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else
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splfild = open(my_file, flag);
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if (splfild < 0) {
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#else
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#ifdef O_BINARY
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#if _MSC_VER
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if ((splfild = _open(my_file, flag | O_BINARY), _S_IREAD | _S_IWRITE) < 0)
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#else
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if ((splfild = open(my_file, flag | O_BINARY, 0775)) < 0)
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#endif
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#else /* O_BINARY */
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if ((splfild = open(my_file, flag, 0755)) < 0)
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#endif /* O_BINARY */
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#endif /* M_WILLIAMS */
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{
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splfild = 0; /* We do not have an open file */
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return(-1);
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}
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#ifdef undf0
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fprintf(errout, "Opened file %s\n", my_file);
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#endif
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return(splfild);
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}
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static void
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close_file(void)
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{
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if (splfild == 0)
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return;
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close(splfild);
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splfild = 0;
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}
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/* stores a cell in a file */
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static void
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putout(CELL l)
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{
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mywrite(splfild, (char *) &l, sizeof(CELL));
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}
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/* stores a pointer to a cell in a file */
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static void
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putcellptr(CELL *l)
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{
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mywrite(splfild, (char *) &l, sizeof(CELLPOINTER));
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}
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/* gets a cell from a file */
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static CELL
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get_cell(void)
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{
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CELL l;
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myread(splfild, (char *) &l, Unsigned(sizeof(CELL)));
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return (l);
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}
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/* gets a cell from a file */
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static CELL
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get_header_cell(void)
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{
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CELL l;
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int count = 0, n;
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while (count < sizeof(CELL)) {
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if ((n = read(splfild, &l, sizeof(CELL)-count)) < 0) {
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Yap_ErrorMessage = "corrupt saved state (too short)";
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return(0L);
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}
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count += n;
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}
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return(l);
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}
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/* gets a pointer to cell from a file */
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static CELL *
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get_cellptr(void)
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{
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CELL *l;
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myread(splfild, (char *) &l, Unsigned(sizeof(CELLPOINTER)));
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return (l);
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}
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/*
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* writes the header (at the moment YAPV*), info about what kind of saved
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* set, the work size, and the space ocuppied
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*/
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static void
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put_info(int info, int mode)
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{
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char msg[256];
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sprintf(msg, "#!/bin/sh\nexec_dir=${YAPBINDIR:-%s}\nexec $exec_dir/yap $0 \"$@\"\n%cYAPV%s", BIN_DIR, 1, YAP_VERSION);
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mywrite(splfild, msg, strlen(msg) + 1);
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putout(Unsigned(info));
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/* say whether we just saved the heap or everything */
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putout(mode);
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/* current state of stacks, to be used by SavedInfo */
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/* space available in heap area */
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putout(Unsigned(Yap_GlobalBase)-Unsigned(Yap_HeapBase));
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/* space available for stacks */
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putout(Unsigned(Yap_LocalBase)-Unsigned(Yap_GlobalBase));
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/* space available for trail */
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putout(Unsigned(Yap_TrailTop)-Unsigned(Yap_TrailBase));
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/* Space used in heap area */
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putout(Unsigned(HeapTop)-Unsigned(Yap_HeapBase));
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/* Space used for local stack */
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putout(Unsigned(LCL0)-Unsigned(ASP));
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/* Space used for global stack */
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putout(Unsigned(H) - Unsigned(Yap_GlobalBase));
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/* Space used for trail */
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putout(Unsigned(TR) - Unsigned(Yap_TrailBase));
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}
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static void
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save_regs(int mode)
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{
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/* save all registers */
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putout((CELL)compile_arrays);
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if (mode == DO_EVERYTHING) {
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putcellptr((CELL *)CP);
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putcellptr(ENV);
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putcellptr(ASP);
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/* putout((CELL)N); */
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putcellptr(H0);
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putcellptr(LCL0);
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putcellptr(H);
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putcellptr(HB);
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putcellptr((CELL *)B);
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putcellptr((CELL *)TR);
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putcellptr(YENV);
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putcellptr(S);
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putcellptr((CELL *)P);
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putout(CreepFlag);
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putout(EX);
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#ifdef COROUTINING
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putout(DelayedVars);
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#endif
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}
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putout(CurrentModule);
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if (mode == DO_EVERYTHING) {
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#ifdef COROUTINING
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putout(WokenGoals);
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#endif
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#ifdef DEPTH_LIMIT
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putout(DEPTH);
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#endif
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}
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/* The operand base */
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putcellptr(CellPtr(XREGS));
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putout(which_save);
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/* Now start by saving the code */
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/* the heap boundaries */
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putcellptr(CellPtr(Yap_HeapBase));
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putcellptr(CellPtr(HeapTop));
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/* and the space it ocuppies */
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putout(Unsigned(HeapUsed));
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/* Then the start of the free code */
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putcellptr(CellPtr(FreeBlocks));
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if (mode == DO_EVERYTHING) {
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/* put the old trail base, just in case it moves again */
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putout(ARG1);
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if (which_save == 2) {
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putout(ARG2);
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}
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putcellptr(CellPtr(Yap_TrailBase));
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}
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}
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static void
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save_code_info(void)
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{
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/* First the instructions */
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{
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op_numbers i;
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OPCODE my_ops[_std_top+1];
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for (i = _Ystop; i <= _std_top; ++i)
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my_ops[i] = Yap_opcode(i);
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mywrite(splfild, (char *)my_ops, sizeof(OPCODE)*(_std_top+1));
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}
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/* and the current character codes */
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mywrite(splfild, Yap_chtype, NUMBER_OF_CHARS);
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}
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static void
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save_heap(void)
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{
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int j;
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/* Then save the whole heap */
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#if defined(YAPOR) || defined(TABLING)
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/* skip the local and global data structures */
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j = Unsigned(&GLOBAL) - Unsigned(Yap_HeapBase);
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putout(j);
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mywrite(splfild, (char *) Yap_HeapBase, j);
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#ifdef USE_HEAP
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j = Unsigned(HeapTop) - Unsigned(&HashChain);
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putout(j);
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mywrite(splfild, (char *) &HashChain, j);
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#else
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j = Unsigned(BaseAllocArea) - Unsigned(&HashChain);
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putout(j);
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mywrite(splfild, (char *) &HashChain, j);
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j = Unsigned(HeapTop) - Unsigned(TopAllocBlockArea);
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putout(j);
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mywrite(splfild, (char *) TopAllocBlockArea, j);
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#endif
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#else
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j = Unsigned(HeapTop) - Unsigned(Yap_HeapBase);
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/* store 10 more cells because of the memory manager */
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mywrite(splfild, (char *) Yap_HeapBase, j);
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#endif /* YAPOR || TABLING */
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}
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static void
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save_stacks(int mode)
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{
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int j;
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switch (mode) {
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case DO_EVERYTHING:
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/* Now, go and save the state */
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/* Save the local stack */
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j = Unsigned(LCL0) - Unsigned(ASP);
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mywrite(splfild, (char *) ASP, j);
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/* Save the global stack */
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j = Unsigned(H) - Unsigned(Yap_GlobalBase);
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mywrite(splfild, (char *) Yap_GlobalBase, j);
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/* Save the trail */
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j = Unsigned(TR) - Unsigned(Yap_TrailBase);
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mywrite(splfild, (char *) Yap_TrailBase, j);
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break;
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case DO_ONLY_CODE:
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{
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tr_fr_ptr tr_ptr = TR;
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while (tr_ptr != (tr_fr_ptr)Yap_TrailBase) {
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CELL val = TrailTerm(tr_ptr-1);
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if (IsVarTerm(val)) {
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CELL *d1 = VarOfTerm(val);
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if (d1 < (CELL *)HeapTop)
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putout(val);
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} else if (IsPairTerm(val)) {
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CELL *d1 = RepPair(val);
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if (d1 < (CELL *)HeapTop)
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putout(val);
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}
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tr_ptr--;
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}
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}
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putcellptr(NULL);
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break;
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}
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}
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static void
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save_crc(void)
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{
|
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/* Save a CRC */
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mywrite(splfild, end_msg, 256);
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#ifdef MACYAP
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NewFileInfo('TEXT', 'MYap');
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if (DefVol)
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SetVol(0l, DefVol);
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DefVol = 0;
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#endif
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}
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static Int
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do_save(int mode) {
|
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#ifdef MACYAP
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NewFileInfo('YAPS', 'MYap');
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#endif
|
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Term t1 = Deref(ARG1);
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if (!Yap_GetName(Yap_FileNameBuf, YAP_FILENAME_MAX, t1)) {
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Yap_Error(TYPE_ERROR_LIST,t1,"save/1");
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return(FALSE);
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}
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|
Yap_CloseStreams(TRUE);
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|
if ((splfild = open_file(Yap_FileNameBuf, O_WRONLY | O_CREAT)) < 0) {
|
|
Yap_Error(SYSTEM_ERROR,MkAtomTerm(Yap_LookupAtom(Yap_FileNameBuf)),
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"restore/1, open(%s)", strerror(errno));
|
|
return(FALSE);
|
|
}
|
|
put_info(FullSaved, mode);
|
|
save_regs(mode);
|
|
save_code_info();
|
|
save_heap();
|
|
save_stacks(mode);
|
|
save_crc();
|
|
close_file();
|
|
return (TRUE);
|
|
}
|
|
|
|
/* Saves a complete prolog environment */
|
|
static Int
|
|
p_save(void)
|
|
{
|
|
#if defined(YAPOR) || defined(THREADS)
|
|
if (NOfThreads != 1) {
|
|
Yap_Error(SYSTEM_ERROR,TermNil,"cannot perform save: more than a worker/thread running");
|
|
return(FALSE);
|
|
}
|
|
#endif
|
|
which_save = 1;
|
|
return(do_save(DO_EVERYTHING));
|
|
}
|
|
|
|
/* Saves a complete prolog environment */
|
|
static Int
|
|
p_save2(void)
|
|
{
|
|
#if defined(YAPOR) || defined(THREADS)
|
|
if (NOfThreads != 1) {
|
|
Yap_Error(SYSTEM_ERROR,TermNil,
|
|
"cannot perform save: more than a worker/thread running");
|
|
return(FALSE);
|
|
}
|
|
#endif
|
|
which_save = 2;
|
|
return(do_save(DO_EVERYTHING) && Yap_unify(ARG2,MkIntTerm(1)));
|
|
}
|
|
|
|
/* Just save the program, not the stacks */
|
|
static Int
|
|
p_save_program(void)
|
|
{
|
|
which_save = 0;
|
|
return(do_save(DO_ONLY_CODE));
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
char pp[80];
|
|
char msg[256];
|
|
CELL hp_size, gb_size, lc_size, tr_size, mode;
|
|
|
|
/* make sure we always check if there are enough bytes */
|
|
/* skip the first line */
|
|
do {
|
|
if (read(splfild, pp, 1) < 0) {
|
|
Yap_ErrorMessage = "corrupt saved state (failed to read first line)";
|
|
return(FAIL_RESTORE);
|
|
}
|
|
} while (pp[0] != 1);
|
|
/* now check the version */
|
|
sprintf(msg, "YAPV%s", YAP_VERSION);
|
|
{
|
|
int count = 0, n, to_read = Unsigned(strlen(msg) + 1);
|
|
while (count < to_read) {
|
|
if ((n = read(splfild, pp, to_read-count)) < 0) {
|
|
Yap_ErrorMessage = "corrupt saved state (header too short)";
|
|
return(FAIL_RESTORE);
|
|
}
|
|
count += n;
|
|
}
|
|
}
|
|
if (pp[0] != 'Y' && pp[1] != 'A' && pp[0] != 'P') {
|
|
Yap_ErrorMessage = "corrupt saved state (should say YAP)";
|
|
return(FAIL_RESTORE);
|
|
}
|
|
if (strcmp(pp, msg) != 0) {
|
|
Yap_ErrorMessage = "corrupt saved state (different version of YAP)";
|
|
return(FAIL_RESTORE);
|
|
}
|
|
/* check info on header */
|
|
/* ignore info on saved state */
|
|
*info = get_header_cell();
|
|
if (Yap_ErrorMessage)
|
|
return(FAIL_RESTORE);
|
|
/* check the restore mode */
|
|
mode = get_header_cell();
|
|
if (Yap_ErrorMessage)
|
|
return(FAIL_RESTORE);
|
|
if (mode != DO_EVERYTHING && mode != DO_ONLY_CODE) {
|
|
Yap_ErrorMessage = "corrupt saved state (bad type)";
|
|
return(FAIL_RESTORE);
|
|
}
|
|
/* ignore info on stacks size */
|
|
*AHeap = get_header_cell();
|
|
*AStack = get_header_cell();
|
|
*ATrail = get_header_cell();
|
|
if (Yap_ErrorMessage)
|
|
return(FAIL_RESTORE);
|
|
/* now, check whether we got enough enough space to load the
|
|
saved space */
|
|
hp_size = get_cell();
|
|
if (Yap_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 (Yap_ErrorMessage)
|
|
return(FAIL_RESTORE);
|
|
gb_size=get_cell();
|
|
if (Yap_ErrorMessage)
|
|
return(FAIL_RESTORE);
|
|
if (Yap_HeapBase != NULL && lc_size+gb_size > Unsigned(Yap_LocalBase) - Unsigned(Yap_GlobalBase)) {
|
|
Yap_ErrorMessage = "not enough stack space for restore";
|
|
return(FAIL_RESTORE);
|
|
}
|
|
if (Yap_HeapBase != NULL && (tr_size = get_cell()) > Unsigned(Yap_TrailTop) - Unsigned(Yap_TrailBase)) {
|
|
Yap_ErrorMessage = "not enough trail space for restore";
|
|
return(FAIL_RESTORE);
|
|
}
|
|
} else {
|
|
/* skip cell size */
|
|
get_header_cell();
|
|
if (Yap_ErrorMessage)
|
|
return(FAIL_RESTORE);
|
|
get_header_cell();
|
|
if (Yap_ErrorMessage)
|
|
return(FAIL_RESTORE);
|
|
get_header_cell();
|
|
if (Yap_ErrorMessage)
|
|
return(FAIL_RESTORE);
|
|
}
|
|
return(mode);
|
|
}
|
|
|
|
/* Gets the state of the heap, and evaluates the related variables */
|
|
static void
|
|
get_heap_info(void)
|
|
{
|
|
OldHeapBase = (ADDR) get_cellptr();
|
|
OldHeapTop = (ADDR) get_cellptr();
|
|
OldHeapUsed = (Int) get_cell();
|
|
FreeBlocks = (BlockHeader *) get_cellptr();
|
|
HDiff = Unsigned(Yap_HeapBase) - Unsigned(OldHeapBase);
|
|
}
|
|
|
|
/* 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 void
|
|
get_regs(int flag)
|
|
{
|
|
CELL *NewGlobalBase = (CELL *)Yap_GlobalBase;
|
|
CELL *NewLCL0 = LCL0;
|
|
CELL *OldXREGS;
|
|
|
|
/* Get regs */
|
|
compile_arrays = (int)get_cell();
|
|
if (flag == DO_EVERYTHING) {
|
|
CP = (yamop *)get_cellptr();
|
|
ENV = get_cellptr();
|
|
ASP = get_cellptr();
|
|
/* N = get_cell(); */
|
|
H0 = get_cellptr();
|
|
LCL0 = get_cellptr();
|
|
H = get_cellptr();
|
|
HB = get_cellptr();
|
|
B = (choiceptr)get_cellptr();
|
|
TR = (tr_fr_ptr)get_cellptr();
|
|
YENV = get_cellptr();
|
|
S = get_cellptr();
|
|
P = (yamop *)get_cellptr();
|
|
CreepFlag = get_cell();
|
|
#ifdef COROUTINING
|
|
DelayedVars = get_cell();
|
|
#endif
|
|
}
|
|
CurrentModule = get_cell();
|
|
if (flag == DO_EVERYTHING) {
|
|
#ifdef COROUTINING
|
|
WokenGoals = get_cell();
|
|
#endif
|
|
#ifdef DEPTH_LIMIT
|
|
DEPTH = get_cell();
|
|
#endif
|
|
}
|
|
/* Get the old bases */
|
|
OldXREGS = get_cellptr();
|
|
which_save = get_cell();
|
|
XDiff = (CELL)XREGS - (CELL)OldXREGS;
|
|
get_heap_info();
|
|
if (flag == DO_EVERYTHING) {
|
|
ARG1 = get_cell();
|
|
if (which_save == 2) {
|
|
ARG2 = get_cell();
|
|
}
|
|
/* get old trail base */
|
|
OldTrailBase = (ADDR)get_cellptr();
|
|
/* Save the old register where we can easily access them */
|
|
OldASP = ASP;
|
|
OldLCL0 = LCL0;
|
|
OldGlobalBase = (CELL *)Yap_GlobalBase;
|
|
OldH = H;
|
|
OldTR = TR;
|
|
GDiff = Unsigned(NewGlobalBase) - Unsigned(Yap_GlobalBase);
|
|
LDiff = Unsigned(NewLCL0) - Unsigned(LCL0);
|
|
TrDiff = LDiff;
|
|
Yap_GlobalBase = (ADDR)NewGlobalBase;
|
|
LCL0 = NewLCL0;
|
|
}
|
|
}
|
|
|
|
/* Get the old opcodes and place them in a hash table */
|
|
static void
|
|
get_insts(OPCODE old_ops[])
|
|
{
|
|
myread(splfild, (char *)old_ops, sizeof(OPCODE)*(_std_top+1));
|
|
}
|
|
|
|
/* Get the old atoms hash table */
|
|
static void
|
|
get_hash(void)
|
|
{
|
|
myread(splfild, Yap_chtype , NUMBER_OF_CHARS);
|
|
}
|
|
|
|
/* Copy all of the old code to the new Heap */
|
|
static void
|
|
CopyCode(void)
|
|
{
|
|
#if defined(YAPOR) || defined(TABLING)
|
|
/* skip the local and global data structures */
|
|
CELL j = get_cell();
|
|
if (j != Unsigned(&GLOBAL) - Unsigned(Yap_HeapBase)) {
|
|
Yap_Error(FATAL_ERROR,TermNil,"bad saved state (code space size does not match)");
|
|
}
|
|
myread(splfild, (char *) Yap_HeapBase, j);
|
|
#ifdef USE_HEAP
|
|
j = get_cell();
|
|
myread(splfild, (char *) &HashChain, j);
|
|
#else
|
|
j = get_cell();
|
|
if (j != Unsigned(BaseAllocArea) - Unsigned(&HashChain)) {
|
|
Yap_Error(FATAL_ERROR,TermNil,"bad saved state (Base to Hash does not match)");
|
|
}
|
|
myread(splfild, (char *) &HashChain, j);
|
|
j = get_cell();
|
|
myread(splfild, (char *) TopAllocBlockArea, j);
|
|
#endif
|
|
#else
|
|
myread(splfild, (char *) Yap_HeapBase,
|
|
(Unsigned(OldHeapTop) - Unsigned(OldHeapBase)));
|
|
#endif /* YAPOR || TABLING */
|
|
}
|
|
|
|
/* Copy the local and global stack and also the trail to their new home */
|
|
/* In REGS we still have nonadjusted values !! */
|
|
static void
|
|
CopyStacks(void)
|
|
{
|
|
Int j;
|
|
char *NewASP;
|
|
|
|
j = Unsigned(OldLCL0) - Unsigned(ASP);
|
|
NewASP = (char *) (Unsigned(ASP) + (Unsigned(LCL0) - Unsigned(OldLCL0)));
|
|
myread(splfild, (char *) NewASP, j);
|
|
j = Unsigned(H) - Unsigned(OldGlobalBase);
|
|
myread(splfild, (char *) Yap_GlobalBase, j);
|
|
j = Unsigned(TR) - Unsigned(OldTrailBase);
|
|
myread(splfild, Yap_TrailBase, j);
|
|
}
|
|
|
|
/* Copy the local and global stack and also the trail to their new home */
|
|
/* In REGS we still have nonadjusted values !! */
|
|
static void
|
|
CopyTrailEntries(void)
|
|
{
|
|
CELL entry, *Entries;
|
|
|
|
Entries = (CELL *)Yap_TrailBase;
|
|
do {
|
|
*Entries++ = entry = get_cell();
|
|
} while ((CODEADDR)entry != NULL);
|
|
}
|
|
|
|
/* get things which are saved in the file */
|
|
static void
|
|
get_coded(int flag, OPCODE old_ops[])
|
|
{
|
|
char my_end_msg[256];
|
|
|
|
get_regs(flag);
|
|
get_insts(old_ops);
|
|
get_hash();
|
|
CopyCode();
|
|
switch (flag) {
|
|
case DO_EVERYTHING:
|
|
CopyStacks();
|
|
break;
|
|
case DO_ONLY_CODE:
|
|
CopyTrailEntries();
|
|
break;
|
|
}
|
|
/* Check CRC */
|
|
myread(splfild, my_end_msg, 256);
|
|
if (strcmp(end_msg,my_end_msg) != 0)
|
|
Yap_Error(FATAL_ERROR,TermNil,"corrupt saved state (bad trailing CRC)");
|
|
}
|
|
|
|
/* restore some heap registers */
|
|
static void
|
|
restore_heap_regs(void)
|
|
{
|
|
HeapTop = AddrAdjust(HeapTop);
|
|
*((YAP_SEG_SIZE *) HeapTop) = InUseFlag;
|
|
HeapMax = HeapUsed = OldHeapUsed;
|
|
restore_codes();
|
|
}
|
|
|
|
/* adjust abstract machine registers */
|
|
static void
|
|
restore_regs(int flag)
|
|
{
|
|
restore_heap_regs();
|
|
if (flag == DO_EVERYTHING) {
|
|
CP = PtoOpAdjust(CP);
|
|
ENV = PtoLocAdjust(ENV);
|
|
ASP = PtoLocAdjust(ASP);
|
|
H = PtoGloAdjust(H);
|
|
B = (choiceptr)PtoLocAdjust(CellPtr(B));
|
|
TR = PtoTRAdjust(TR);
|
|
P = PtoOpAdjust(P);
|
|
HB = PtoLocAdjust(HB);
|
|
YENV = PtoLocAdjust(YENV);
|
|
S = PtoGloAdjust(S);
|
|
#ifdef COROUTINING
|
|
DelayedVars = AbsAppl(PtoGloAdjust(RepAppl(DelayedVars)));
|
|
#ifdef MULTI_ASSIGNMENT_VARIABLES
|
|
WokenGoals = AbsAppl(PtoGloAdjust(RepAppl(WokenGoals)));
|
|
#endif
|
|
#endif
|
|
}
|
|
}
|
|
|
|
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)
|
|
{
|
|
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 (HDiff == 0)
|
|
return;
|
|
basep = H;
|
|
if (H + (NOfE*2) > ASP) {
|
|
basep = (CELL *)TR;
|
|
if (basep + (NOfE*2) > (CELL *)Yap_TrailTop) {
|
|
if (!Yap_growtrail((ADDR)(basep + (NOfE*2))-Yap_TrailTop)) {
|
|
Yap_Error(SYSTEM_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];
|
|
}
|
|
}
|
|
|
|
#include "rheap.h"
|
|
|
|
/* restore the atom entries which are invisible for the user */
|
|
static void
|
|
RestoreForeignCodeStructure(void)
|
|
{
|
|
ForeignObj *f_code;
|
|
|
|
if (ForeignCodeLoaded != NULL)
|
|
ForeignCodeLoaded = (void *)AddrAdjust((ADDR)ForeignCodeLoaded);
|
|
f_code = ForeignCodeLoaded;
|
|
while (f_code != NULL) {
|
|
StringList objs, libs;
|
|
if (f_code->objs != NULL)
|
|
f_code->objs = (StringList)AddrAdjust((ADDR)f_code->objs);
|
|
objs = f_code->objs;
|
|
while (objs != NULL) {
|
|
if (objs->next != NULL)
|
|
objs->next = (StringList)AddrAdjust((ADDR)objs->next);
|
|
if (objs->s != NULL)
|
|
objs->s = (char *)AddrAdjust((ADDR)objs->s);
|
|
objs = objs->next;
|
|
}
|
|
if (f_code->libs != NULL)
|
|
f_code->libs = (StringList)AddrAdjust((ADDR)f_code->libs);
|
|
libs = f_code->libs;
|
|
while (libs != NULL) {
|
|
if (libs->next != NULL)
|
|
libs->next = (StringList)AddrAdjust((ADDR)libs->next);
|
|
if (libs->s != NULL)
|
|
libs->s = (char *)AddrAdjust((ADDR)libs->s);
|
|
libs = libs->next;
|
|
}
|
|
if (f_code->f != NULL)
|
|
f_code->f = (char *)AddrAdjust((ADDR)f_code->f);
|
|
if (f_code->next != NULL)
|
|
f_code->next = (ForeignObj *)AddrAdjust((ADDR)f_code->f);
|
|
f_code = f_code->next;
|
|
}
|
|
}
|
|
|
|
/* restore the atom entries which are invisible for the user */
|
|
static void
|
|
RestoreIOStructures(void)
|
|
{
|
|
Yap_InitStdStreams();
|
|
}
|
|
|
|
/* restores the list of free space, with its curious structure */
|
|
static void
|
|
RestoreFreeSpace(void)
|
|
{
|
|
register BlockHeader *bpt, *bsz;
|
|
if (FreeBlocks != NULL)
|
|
FreeBlocks = BlockAdjust(FreeBlocks);
|
|
bpt = FreeBlocks;
|
|
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;
|
|
}
|
|
|
|
/* restore the atom entries which are invisible for the user */
|
|
static void
|
|
RestoreInvisibleAtoms(void)
|
|
{
|
|
AtomEntry *at;
|
|
Atom atm = INVISIBLECHAIN.Entry;
|
|
|
|
INVISIBLECHAIN.Entry = atm = AtomAdjust(atm);
|
|
at = RepAtom(atm);
|
|
if (EndOfPAEntr(at))
|
|
return;
|
|
do {
|
|
#ifdef DEBUG_RESTORE2 /* useful during debug */
|
|
fprintf(errout, "Restoring %s\n", at->StrOfAE);
|
|
#endif
|
|
at->PropsOfAE = PropAdjust(at->PropsOfAE);
|
|
RestoreEntries(RepProp(at->PropsOfAE));
|
|
atm = at->NextOfAE;
|
|
at->NextOfAE = atm = AtomAdjust(atm);
|
|
at = RepAtom(atm);
|
|
}
|
|
while (!EndOfPAEntr(at));
|
|
}
|
|
|
|
/*
|
|
* This is the really tough part, to restore the whole of the heap
|
|
*/
|
|
static void
|
|
restore_heap(void)
|
|
{
|
|
AtomHashEntry *HashPtr = HashChain;
|
|
register int i;
|
|
for (i = 0; i < AtomHashTableSize; ++i) {
|
|
Atom atm = HashPtr->Entry;
|
|
if (atm) {
|
|
AtomEntry *at;
|
|
HashPtr->Entry = atm = AtomAdjust(atm);
|
|
at = RepAtom(atm);
|
|
do {
|
|
#ifdef DEBUG_RESTORE2 /* useful during debug */
|
|
fprintf(errout, "Restoring %s\n", at->StrOfAE);
|
|
#endif
|
|
at->PropsOfAE = PropAdjust(at->PropsOfAE);
|
|
RestoreEntries(RepProp(at->PropsOfAE));
|
|
atm = at->NextOfAE = AtomAdjust(at->NextOfAE);
|
|
at = RepAtom(atm);
|
|
} while (!EndOfPAEntr(at));
|
|
}
|
|
HashPtr++;
|
|
}
|
|
RestoreInvisibleAtoms();
|
|
RestoreForeignCodeStructure();
|
|
RestoreIOStructures();
|
|
}
|
|
|
|
|
|
#ifdef DEBUG_RESTORE3
|
|
static void
|
|
ShowEntries(pp)
|
|
PropEntry *pp;
|
|
{
|
|
while (!EndOfPAEntr(pp)) {
|
|
fprintf(Yap_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(Yap_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) {
|
|
int mode;
|
|
|
|
if ((mode = check_header(Astate,ATrail,AStack,AHeap)) == FAIL_RESTORE)
|
|
return(FAIL_RESTORE);
|
|
Yap_PrologMode = BootMode;
|
|
if (Yap_HeapBase) {
|
|
if (!yap_flags[HALT_AFTER_CONSULT_FLAG]) {
|
|
Yap_TrueFileName(s,Yap_FileNameBuf2, YAP_FILENAME_MAX);
|
|
fprintf(stderr, "%% Restoring file %s\n", Yap_FileNameBuf2);
|
|
}
|
|
Yap_CloseStreams(TRUE);
|
|
}
|
|
#ifdef DEBUG_RESTORE4
|
|
/*
|
|
* This should be another file, like the log file
|
|
*/
|
|
errout = Yap_stderr;
|
|
#endif
|
|
return(mode);
|
|
}
|
|
|
|
static void
|
|
cat_file_name(char *s, 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);
|
|
}
|
|
|
|
static int
|
|
OpenRestore(char *inpf, char *YapLibDir, CELL *Astate, CELL *ATrail, CELL *AStack, CELL *AHeap)
|
|
{
|
|
int mode = FAIL_RESTORE;
|
|
|
|
Yap_ErrorMessage = NULL;
|
|
if (inpf == NULL)
|
|
inpf = StartUpFile;
|
|
if (inpf != NULL && (splfild = open_file(inpf, O_RDONLY)) > 0) {
|
|
if ((mode = commit_to_saved_state(inpf,Astate,ATrail,AStack,AHeap)) != FAIL_RESTORE) {
|
|
Yap_ErrorMessage = NULL;
|
|
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(Yap_FileNameBuf, Yap_LibDir, inpf, YAP_FILENAME_MAX);
|
|
if ((splfild = open_file(Yap_FileNameBuf, O_RDONLY)) > 0) {
|
|
if ((mode = commit_to_saved_state(Yap_FileNameBuf,Astate,ATrail,AStack,AHeap)) != FAIL_RESTORE) {
|
|
Yap_ErrorMessage = NULL;
|
|
return(mode);
|
|
}
|
|
}
|
|
}
|
|
#if HAVE_GETENV
|
|
{
|
|
char *yap_env = getenv("YAPLIBDIR");
|
|
if (yap_env != NULL) {
|
|
cat_file_name(Yap_FileNameBuf, yap_env, inpf, YAP_FILENAME_MAX);
|
|
if ((splfild = open_file(Yap_FileNameBuf, O_RDONLY)) > 0) {
|
|
if ((mode = commit_to_saved_state(Yap_FileNameBuf,Astate,ATrail,AStack,AHeap)) != FAIL_RESTORE) {
|
|
Yap_ErrorMessage = NULL;
|
|
return(mode);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
if (LIB_DIR != NULL) {
|
|
cat_file_name(Yap_FileNameBuf, LIB_DIR, inpf, YAP_FILENAME_MAX);
|
|
if ((splfild = open_file(Yap_FileNameBuf, O_RDONLY)) > 0) {
|
|
if ((mode = commit_to_saved_state(Yap_FileNameBuf,Astate,ATrail,AStack,AHeap)) != FAIL_RESTORE) {
|
|
Yap_ErrorMessage = NULL;
|
|
return(mode);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* could not open file */
|
|
if (Yap_ErrorMessage == NULL) {
|
|
Yap_Error(SYSTEM_ERROR,TermNil,"could not open %s,",inpf);
|
|
} else {
|
|
Yap_Error(SYSTEM_ERROR, TermNil, Yap_ErrorMessage);
|
|
}
|
|
Yap_ErrorMessage = NULL;
|
|
return(FAIL_RESTORE);
|
|
}
|
|
|
|
static void
|
|
CloseRestore(void)
|
|
{
|
|
#ifdef DEBUG_RESTORE3
|
|
ShowAtoms();
|
|
#endif
|
|
close_file();
|
|
Yap_PrologMode = UserMode;
|
|
}
|
|
|
|
static int
|
|
check_opcodes(OPCODE old_ops[])
|
|
{
|
|
#if USE_THREADED_CODE
|
|
int 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
|
|
return(FALSE);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
RestoreHeap(OPCODE old_ops[])
|
|
{
|
|
int heap_moved = (OldHeapBase != Yap_HeapBase), opcodes_moved;
|
|
|
|
opcodes_moved = check_opcodes(old_ops);
|
|
/* opcodes_moved has side-effects and should be tried first */
|
|
if (heap_moved || opcodes_moved) {
|
|
restore_heap();
|
|
}
|
|
/* This must be done after restore_heap */
|
|
if (heap_moved) {
|
|
RestoreFreeSpace();
|
|
}
|
|
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
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
CELL MyTrail, MyStack, MyHeap, MyState;
|
|
int mode;
|
|
|
|
mode = OpenRestore(FileName, YapLibDir, &MyState, &MyTrail, &MyStack, &MyHeap);
|
|
close_file();
|
|
if (mode == FAIL_RESTORE) {
|
|
Yap_ErrorMessage = NULL;
|
|
return(0);
|
|
}
|
|
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(void)
|
|
{
|
|
CELL entry, *Entries;
|
|
|
|
/* initialise a choice point */
|
|
B = (choiceptr)LCL0;
|
|
B--;
|
|
B->cp_ap = NOCODE;
|
|
Entries = (CELL *)Yap_TrailBase;
|
|
while ((entry = *Entries++) != (CELL)NULL) {
|
|
if (IsVarTerm(entry)) {
|
|
RESET_VARIABLE((CELL *)entry);
|
|
} else if (IsPairTerm(entry)) {
|
|
CELL *ent = CellPtoHeapAdjust(RepPair(entry));
|
|
register CELL flags;
|
|
|
|
flags = *ent;
|
|
ResetFlag(InUseMask, flags);
|
|
*ent = flags;
|
|
if (FlagOn(ErasedMask, flags)) {
|
|
if (FlagOn(DBClMask, flags)) {
|
|
Yap_ErDBE(DBStructFlagsToDBStruct(ent));
|
|
} else {
|
|
if (flags & LogUpdMask) {
|
|
Yap_ErLogUpdCl(ClauseFlagsToLogUpdClause(ent));
|
|
} else {
|
|
Yap_ErCl(ClauseFlagsToDynamicClause(ent));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
B = NULL;
|
|
}
|
|
|
|
|
|
int in_limbo = FALSE;
|
|
|
|
|
|
/*
|
|
* This function is called when wanting only to restore the heap and
|
|
* associated registers
|
|
*/
|
|
static int
|
|
Restore(char *s, char *lib_dir)
|
|
{
|
|
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)) == FAIL_RESTORE)
|
|
return(FALSE);
|
|
Yap_ShutdownLoadForeign();
|
|
in_limbo = TRUE;
|
|
get_coded(restore_mode, old_ops);
|
|
restore_regs(restore_mode);
|
|
in_limbo = FALSE;
|
|
/*#endif*/
|
|
RestoreHeap(old_ops);
|
|
switch(restore_mode) {
|
|
case DO_EVERYTHING:
|
|
if (OldHeapBase != Yap_HeapBase ||
|
|
OldLCL0 != LCL0 ||
|
|
OldGlobalBase != (CELL *)Yap_GlobalBase ||
|
|
OldTrailBase != Yap_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();
|
|
Yap_InitYaamRegs();
|
|
break;
|
|
}
|
|
|
|
Yap_ReOpenLoadForeign();
|
|
Yap_InitPlIO();
|
|
/* reset time */
|
|
Yap_ReInitWallTime();
|
|
CloseRestore();
|
|
if (which_save == 2) {
|
|
Yap_unify(ARG2, MkIntTerm(0));
|
|
}
|
|
return(restore_mode);
|
|
}
|
|
|
|
int
|
|
Yap_Restore(char *s, char *lib_dir)
|
|
{
|
|
return Restore(s, lib_dir);
|
|
}
|
|
|
|
static Int
|
|
p_restore(void)
|
|
{
|
|
int mode;
|
|
|
|
Term t1 = Deref(ARG1);
|
|
#if defined(YAPOR) || defined(THREADS)
|
|
if (NOfThreads != 1) {
|
|
Yap_Error(SYSTEM_ERROR,TermNil,"cannot perform save: more than a worker/thread running");
|
|
return(FALSE);
|
|
}
|
|
#endif
|
|
if (!Yap_GetName(Yap_FileNameBuf, YAP_FILENAME_MAX, t1)) {
|
|
Yap_Error(TYPE_ERROR_LIST,t1,"restore/1");
|
|
return(FALSE);
|
|
}
|
|
if ((mode = Restore(Yap_FileNameBuf, NULL)) == DO_ONLY_CODE) {
|
|
#if PUSH_REGS
|
|
restore_absmi_regs(&Yap_standard_regs);
|
|
#endif
|
|
/* back to the top level we go */
|
|
siglongjmp(Yap_RestartEnv,3);
|
|
}
|
|
return(mode != FAIL_RESTORE);
|
|
}
|
|
|
|
void
|
|
Yap_InitSavePreds(void)
|
|
{
|
|
Yap_InitCPred("$save", 1, p_save, SafePredFlag|SyncPredFlag);
|
|
Yap_InitCPred("$save", 2, p_save2, SafePredFlag|SyncPredFlag);
|
|
Yap_InitCPred("$save_program", 1, p_save_program, SafePredFlag|SyncPredFlag);
|
|
Yap_InitCPred("$restore", 1, p_restore, SyncPredFlag);
|
|
}
|