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Huge atoms in scanner may generate heap overflow. 

git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1532 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
This commit is contained in:
vsc 2006-02-01 13:58:30 +00:00
parent 9e697d5bee
commit b6b8366698
3 changed files with 10 additions and 1 deletions
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7
C/iopreds.c
View File

@ -3073,6 +3073,11 @@ static Int
if (!Yap_ExpandPreAllocCodeSpace(0, NULL)) {
return FALSE;
}
} else if (Yap_Error_TYPE == OUT_OF_HEAP_ERROR) {
Yap_Error_TYPE = YAP_NO_ERROR;
if (!Yap_growheap(FALSE, 0, NULL)) {
return FALSE;
}
} else if (Yap_Error_TYPE == OUT_OF_STACK_ERROR) {
Yap_Error_TYPE = YAP_NO_ERROR;
if (!Yap_gc(nargs, ENV, CP)) {
@ -4142,7 +4147,7 @@ format(volatile Term otail, volatile Term oargs, int sno)
if (IsIntegerTerm(t)) {
Int il = IntegerOfTerm(t);
#if HAVE_SNPRINTF
snprintf(tmp1, 256, "%ld", il);
snprintf(tmp1, 256, "%ld", (long int)il);
#else
sprintf(tmp1, "%ld", (long int)il);
#endif

2
C/scanner.c
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@ -752,6 +752,7 @@ Yap_tokenizer(int inp_stream)
/* huge atom or variable, we are in trouble */
Yap_ErrorMessage = "Code Space Overflow due to huge atom";
Yap_Error_TYPE = OUT_OF_AUXSPACE_ERROR;
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
if (p)
p->Tok = Ord(kind = eot_tok);
/* serious error now */
@ -764,6 +765,7 @@ Yap_tokenizer(int inp_stream)
/* don't do this in iso */
Atom ae = Yap_LookupAtom(TokImage);
if (ae == NIL) {
Yap_Error_TYPE = OUT_OF_HEAP_ERROR;
Yap_ErrorMessage = "Code Space Overflow";
if (p)
t->Tok = Ord(kind = eot_tok);

2
changes-5.1.html
View File

@ -16,6 +16,8 @@
<h2>Yap-5.1.0:</h2>
<ul>
<li> FIXED: handle heap overflow from huge atoms in
Yap_LookupAtom/scanner (Nuno Fonseca).</li>
<li> FIXED: bignum was using int where should be long int (Roberto Bagnara).</li>
<li> NEW: x86_64 should have registers, right? First cut at using them.</li>
<li> FIXED: call_n would break under 64 bits, an int problem.</li>