/*
-** LCLint - annotation-assisted static program checker
-** Copyright (C) 1994-2001 University of Virginia,
+** Splint - annotation-assisted static program checker
+** Copyright (C) 1994-2002 University of Virginia,
** Massachusetts Institute of Technology
**
** This program is free software; you can redistribute it and/or modify it
** the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
** MA 02111-1307, USA.
**
-** For information on lclint: lclint-request@cs.virginia.edu
-** To report a bug: lclint-bug@cs.virginia.edu
-** For more information: http://lclint.cs.virginia.edu
+** For information on splint: info@splint.org
+** To report a bug: splint-bug@splint.org
+** For more information: http://www.splint.org
*/
/*
** exprNode.c
*/
# include <ctype.h> /* for isdigit */
-# include "lclintMacros.nf"
+# include "splintMacros.nf"
# include "basic.h"
# include "cgrammar.h"
# include "cgrammar_tokens.h"
# include "transferChecks.h"
# include "exprNodeSList.h"
+static bool exprNode_sameStorage (exprNode p_e1, exprNode p_e2) /*@*/ ;
static bool exprNode_isEmptyStatement (exprNode p_e);
static /*@exposed@*/ exprNode exprNode_firstStatement (/*@returned@*/ exprNode p_e);
static bool exprNode_isFalseConstant (exprNode p_e) /*@*/ ;
-static bool exprNode_isBlock (exprNode p_e);
+static bool exprNode_isStatement (exprNode p_e);
static void checkGlobUse (uentry p_glob, bool p_isCall, /*@notnull@*/ exprNode p_e);
static void exprNode_addUse (exprNode p_e, /*@exposed@*/ sRef p_s);
static bool exprNode_matchArgType (ctype p_ct, exprNode p_e);
static ctype filelocType;
static bool initMod = FALSE;
-static void exprNode_defineConstraints(/*@sef@*/ /*@special@*/ /*@notnull@*/ exprNode p_e)
- /*@defines p_e->requiresConstraints, p_e->ensuresConstraints, p_e->trueEnsuresConstraints, p_e->falseEnsuresConstraints @*/
- ;
-
-# define exprNode_defineConstraints(e) \
-do{ (e)->requiresConstraints = constraintList_makeNew(); \
- (e)->ensuresConstraints = constraintList_makeNew(); \
- (e)->trueEnsuresConstraints = constraintList_makeNew(); \
- (e)->falseEnsuresConstraints = constraintList_makeNew(); } while(FALSE)
+/*@function void exprNode_swap (sef exprNode, sef exprNode)@*/
+/*@-macroassign@*/
+# define exprNode_swap(e1,e2) do { exprNode m_tmp = (e1); (e1) = (e2); (e2) = m_tmp; } while (FALSE)
+/*@=macroassign@*/
+static void exprNode_defineConstraints(/*@sef@*/ /*@special@*/ /*@notnull@*/ exprNode e)
+ /*@defines e->requiresConstraints, e->ensuresConstraints,
+ e->trueEnsuresConstraints, e->falseEnsuresConstraints @*/
+{
+ e->requiresConstraints = constraintList_makeNew ();
+ e->ensuresConstraints = constraintList_makeNew ();
+ e->trueEnsuresConstraints = constraintList_makeNew ();
+ e->falseEnsuresConstraints = constraintList_makeNew ();
+}
/*
** must occur after library has been read
while (e->kind == XPR_PARENS)
{
e = exprData_getUopNode (e->edata);
- llassert (exprNode_isDefined (e));
+
+ if (!exprNode_isDefined (e))
+ {
+ return FALSE;
+ }
+
+ /* evans 2002-02-05: was llassert (exprNode_isDefined (e)); but this can fail */
}
if (e->kind == XPR_CONST)
exprNode_rawStringLiteral (/*@only@*/ cstring t, /*@only@*/ fileloc loc)
{
exprNode e = exprNode_createLoc (ctype_string, loc);
- int len = cstring_length (t);
+ size_t len = cstring_length (t);
if (context_getFlag (FLG_STRINGLITERALLEN))
{
- if (len > context_getValue (FLG_STRINGLITERALLEN))
+ if (len > size_fromInt (context_getValue (FLG_STRINGLITERALLEN)))
{
voptgenerror (FLG_STRINGLITERALLEN,
message
("String literal length (%d) exceeds maximum "
"length (%d): \"%s\"",
- len,
+ size_toInt (len),
context_getValue (FLG_STRINGLITERALLEN),
t),
e->loc);
e->kind = XPR_STRINGLITERAL;
e->val = multiVal_makeString (cstring_copy (t));
e->edata = exprData_makeLiteral (t);
- e->sref = sRef_makeType (ctype_string);
+ e->sref = sRef_makeConst (ctype_string);
if (context_getFlag (FLG_READONLYSTRINGS))
{
return (e); /* s released */
}
+/*@only@*/ exprNode
+exprNode_wideStringLiteral (/*@only@*/ cstring t, /*@only@*/ fileloc loc)
+{
+ exprNode res = exprNode_stringLiteral (t, loc);
+ res->typ = ctype_makeWideString ();
+ return res;
+}
+
/*@only@*/ exprNode
exprNode_stringLiteral (/*@only@*/ cstring t, /*@only@*/ fileloc loc)
{
- int len = cstring_length (t) - 2;
+ size_t len = size_fromInt (cstring_length (t) - 2);
char *ts = cstring_toCharsSafe (t);
char *s = cstring_toCharsSafe (cstring_create (len + 1));
llassert (*ts == '\"' && *(ts + len + 1) == '\"');
- strncpy (s, ts+1, size_fromInt (len));
+ strncpy (s, ts+1, len);
*(s + len) = '\0';
cstring_free (t);
return exprNode_rawStringLiteral (cstring_fromCharsO (s), loc);
return (e);
}
+exprNode exprNode_makeConstantString (cstring c, /*@only@*/ fileloc loc)
+{
+ exprNode e = exprNode_createPlain (ctype_unknown);
+ e->kind = XPR_VAR;
+ e->loc = loc;
+ e->sref = sRef_makeConst (ctype_string);
+ e->edata = exprData_makeId (uentry_makeUnrecognized (c, fileloc_copy (loc)));
+ e->typ = ctype_string;
+
+ /* No alias errors for unrecognized identifiers */
+ sRef_setAliasKind (e->sref, AK_STATIC, loc);
+ sRef_setExKind (e->sref, XO_OBSERVER, loc);
+
+ return (e);
+}
+
exprNode exprNode_createId (/*@observer@*/ uentry c)
{
if (uentry_isValid (c))
{
exprNode e = exprNode_new ();
-
+
+ DPRINTF (("create id: %s", uentry_unparse (c)));
+
e->typ = uentry_getType (c);
if (uentry_isFunction (c)
/*
** yoikes! leaving this out was a heinous bug...that would have been
- ** caught if i had lclint working first. gag!
+ ** caught if i had splint working first. gag!
*/
e->etext = cstring_undefined;
e->msets = sRefSet_new ();
e->uses = sRefSet_new ();
- /*> missing fields, detected by lclint <*/
+ /*> missing fields, detected by splint <*/
e->exitCode = XK_NEVERESCAPE;
e->isJumpPoint = FALSE;
e->canBreak = FALSE;
}
ret = exprNode_fromIdentifierAux (c);
-
return ret;
}
+static void exprNode_checkStringLiteralLength (ctype t1, exprNode e2)
+{
+ multiVal mval = exprNode_getValue (e2);
+ cstring slit;
+ int len;
+
+ if (ctype_isFixedArray (t1))
+ {
+ int nelements = long_toInt (ctype_getArraySize (t1));
+
+ llassert (multiVal_isString (mval));
+ slit = multiVal_forceString (mval);
+
+ len = cstring_lengthExpandEscapes (slit);
+
+ llassert (exprNode_isDefined (e2));
+
+ if (len == nelements)
+ {
+ mstring temp;
+
+ temp = cstring_expandEscapes (slit);
+
+ if (temp[len-1] == '\0')
+ {
+ voptgenerror
+ (FLG_STRINGLITNOROOMFINALNULL,
+ message ("String literal with %d character%& "
+ "is assigned to %s (no room for final null terminator): %s",
+ len + 1,
+ ctype_unparse (t1),
+ exprNode_unparse (e2)),
+ e2->loc);
+ }
+ else
+ {
+ voptgenerror
+ (FLG_STRINGLITNOROOM,
+ message ("String literal with %d character%& "
+ "is assigned to %s (no room for null terminator): %s",
+ len + 1,
+ ctype_unparse (t1),
+ exprNode_unparse (e2)),
+ e2->loc);
+ }
+ }
+ else if (len > nelements)
+ {
+ voptgenerror
+ (FLG_STRINGLITTOOLONG,
+ message ("String literal with %d character%& (counting null terminator) "
+ "is assigned to %s (insufficient storage available): %s",
+ len + 1,
+ ctype_unparse (t1),
+ exprNode_unparse (e2)),
+ e2->loc);
+ }
+ else if (len < nelements - 1)
+ {
+ voptgenerror
+ (FLG_STRINGLITSMALLER,
+ message ("String literal with %d character%& is assigned to %s (possible waste of storage): %s",
+ len + 1,
+ ctype_unparse (t1),
+ exprNode_unparse (e2)),
+ e2->loc);
+ }
+ else
+ {
+ ; /* okay */
+ }
+ }
+}
+
static /*@only@*/ /*@notnull@*/ exprNode
exprNode_fromIdentifierAux (/*@observer@*/ uentry c)
{
{
return (multiVal_forceInt (m) >= 0);
}
+
+ /*
+ ** This is not always true if programmer defines enum
+ ** values, but then the constant should be known.
+ */
+
+ if (ctype_isEnum (ctype_realType (e->typ)))
+ {
+ return TRUE;
+ }
}
return FALSE;
** error in ind, assume valid and continue
*/
+ DPRINTF (("Array fetch: %s / %s",
+ exprNode_unparse (e1), exprNode_unparse (e2)));
+
if (exprNode_isError (e1))
{
exprNode_free (e2);
/*
** this sets up funny aliasing, that leads to spurious
- ** lclint errors. Hence, the i2 comments.
+ ** splint errors. Hence, the i2 comments.
*/
- if (!ctype_isRealArray (crarr)
+ /* evans 2001-09-09 added ctype_isKnown so there is no swap when e1 type is unknown */
+ if (ctype_isKnown (crarr)
+ && !ctype_isRealArray (crarr)
&& ctype_isRealNumeric (crarr)
&& !exprNode_isError (e2)
&& ctype_isRealAP (exprNode_getType (e2))) /* fetch like 3[a] */
ind = e2;
}
+ DPRINTF (("arr: %s", exprNode_unparse (arr)));
+
if (sRef_possiblyNull (arr->sref))
{
if (!usymtab_isGuarded (arr->sref))
exprNode_unparse (arr)),
arr->loc))
{
+ DPRINTF (("ref: %s", sRef_unparseFull (arr->sref)));
sRef_showNullInfo (arr->sref);
/* suppress future messages */
/*@switchbreak@*/ break;
case 'c': /* int converted to char (check its a char?) */
- expecttype = ctype_makeConj (ctype_char, ctype_uchar);
+ expecttype = ctype_makeConj (ctype_int,
+ ctype_makeConj (ctype_char,
+ ctype_uchar));
+ /*@i231@*/
+ /* evans 2001-10-05 - changed to reflect correct ISO spec:
+ int converted to char */
+
+ /* expecttype = ctype_makeConj (ctype_char, ctype_uchar); */
/*@switchbreak@*/ break;
case 's': /* string */
hasError = optgenerror
(FLG_EVALORDER,
message ("Expression has undefined behavior "
- "(value of left operand is modified "
- "by right operand): %s %s %s",
+ "(value of left operand %s is modified "
+ "by right operand %s): %s %s %s",
+ exprNode_unparse (e1),
+ exprNode_unparse (e2),
exprNode_unparse (e1), lltok_unparse (op),
exprNode_unparse (e2)),
e2->loc);
if (freshMods)
{
/*
- ** Spurious errors reported, because lclint can't tell
+ ** Spurious errors reported, because splint can't tell
** mods must be fresh if freshMods is true.
*/
}
static void
-reflectEnsuresClause (uentry le, exprNode f, exprNodeList args)
+reflectEnsuresClause (exprNode ret, uentry le, exprNode f, exprNodeList args)
{
DPRINTF (("Reflect ensures clause: %s(%s) / %s / %s",
exprNode_unparse (f), exprNodeList_unparse (args),
if (sRef_isResult (sRef_getRootBase (sel)))
{
- ; /*@i423 what do we do about results */
+ s = exprNode_getSref (ret);
}
else
{
s = sRef_fixBaseParam (sel, args);
- DPRINTF (("Reflecting state clause on: %s / %s",
- sRef_unparse (sel), sRef_unparse (s)));
-
- sRef_setMetaStateValueComplete (s, key, mvalue, exprNode_loc (f));
}
+
+ DPRINTF (("Reflecting state clause on: %s / %s",
+ sRef_unparse (sel), sRef_unparse (s)));
+
+ sRef_setMetaStateValueComplete (s, key, mvalue, exprNode_loc (f));
} end_sRefSet_elements;
sRefSet_free (osrs);
sRefSet srs = stateClause_getRefs (cl);
sRefModVal modf = stateClause_getEnsuresFunction (cl);
int eparam = stateClause_getStateParameter (cl);
-
+
+ llassert (modf != NULL);
+
DPRINTF (("Reflect after clause: %s / %s",
stateClause_unparse (cl),
sRefSet_unparse (srs)));
if (sRef_isResult (sRef_getRootBase (sel)))
{
- ; /*@i423 what do we do about results */
+ DPRINTF (("Fix base: %s / %s",
+ sRef_unparse (sel), sRef_unparse (exprNode_getSref (ret))));
+ s = sRef_fixBase (sel, exprNode_getSref (ret));
+ DPRINTF (("==> %s", sRef_unparseFull (s)));
}
else
{
s = sRef_fixBaseParam (sel, args);
+ }
+
+ DPRINTF (("elements: %s", sRef_unparse (s)));
+ DPRINTF (("elements: %s", sRef_unparseFull (s)));
+
+ DPRINTF (("Reflecting state clause on: %s / %s",
+ sRef_unparseFull (sel), sRef_unparseFull (s)));
+
+ /* evans 2001-08-24 - added aliasSetCompleteParam */
+ sRef_aliasSetCompleteParam (modf, s, eparam, exprNode_loc (f));
+
+ DPRINTF (("After reflecting state clause on: %s / %s",
+ sRef_unparseFull (sel), sRef_unparseFull (s)));
+ } end_sRefSet_elements;
+ }
+ }
+ } end_stateClauseList_elements ;
+ }
+
+ DPRINTF (("Here: %s / %s",
+ uentry_unparseFull (le),
+ bool_unparse (uentry_hasMetaStateEnsures (le))));
+
+ if (uentry_hasMetaStateEnsures (le))
+ {
+ fileloc loc = exprNode_loc (f);
+
+ metaStateConstraintList mscl = uentry_getMetaStateEnsures (le);
+
+ metaStateConstraintList_elements (mscl, msc)
+ {
+ metaStateSpecifier msspec = metaStateConstraint_getSpecifier (msc);
+ metaStateInfo msinfo = metaStateSpecifier_getMetaStateInfo (msspec);
+ metaStateExpression msexpr = metaStateConstraint_getExpression (msc);
+ cstring key = metaStateInfo_getName (msinfo);
+ sRef mlsr = metaStateSpecifier_getSref (msspec);
+ sRef s;
+ sRef lastref = sRef_undefined;
+ stateValue sval = stateValue_undefined;
+
+ DPRINTF (("Meta state constraint for %s: %s", uentry_unparse (le),
+ metaStateConstraint_unparse (msc)));
+ DPRINTF (("Matches left: %s", sRef_unparseDebug (mlsr)));
+
+ if (sRef_isResult (sRef_getRootBase (mlsr)))
+ {
+ s = exprNode_getSref (ret);
+ }
+ else
+ {
+ s = sRef_fixBaseParam (mlsr, args);
+ }
+
+ DPRINTF (("Setting state: %s", sRef_unparseFull (s)));
+
+ while (metaStateExpression_isDefined (msexpr))
+ {
+ metaStateSpecifier ms = metaStateExpression_getSpecifier (msexpr);
+ metaStateInfo msi = metaStateSpecifier_getMetaStateInfo (ms);
+ sRef msr, fs;
+
+ DPRINTF (("Check expression: %s", metaStateExpression_unparse (msexpr)));
+
+ if (metaStateExpression_isMerge (msexpr))
+ {
+ msexpr = metaStateExpression_getRest (msexpr);
+ }
+ else
+ {
+ msexpr = metaStateExpression_undefined;
+ }
+
+ if (metaStateInfo_isDefined (msi))
+ {
+ /* Must match lhs state */
+ llassert (metaStateInfo_equal (msinfo, msi));
+ }
+
+ if (metaStateSpecifier_isElipsis (ms))
+ {
+ /*
+ ** For elipsis, we need to merge all the relevant elipsis parameters
+ **
+ */
+
+ uentryList params = uentry_getParams (le);
+ int paramno = uentryList_size (params) - 1;
+
+ if (!uentry_isElipsisMarker (uentryList_getN (params, paramno)))
+ {
+ voptgenerror
+ (FLG_TYPE,
+ message ("Ensures clauses uses ... for function without ... in parameter list: %q",
+ uentry_getName (le)),
+ uentry_whereLast (le));
+ /*@innerbreak@*/ break;
+ }
+
+ while (paramno < exprNodeList_size (args))
+ {
+ exprNode arg = exprNodeList_getN (args, paramno);
+ fs = exprNode_getSref (arg);
+ DPRINTF (("Merge arg: %s", exprNode_unparse (arg)));
+
+ /* cut and pasted... gack*/
+ if (stateValue_isDefined (sval))
+ {
+ /* Use combination table to merge old state value with new one: */
+ stateValue tval = sRef_getMetaStateValue (fs, key);
- DPRINTF (("elements: %s", sRef_unparse (s)));
- DPRINTF (("elements: %s", sRef_unparseFull (s)));
+ if (stateValue_isDefined (tval))
+ {
+ stateCombinationTable sctable = metaStateInfo_getMergeTable (msinfo);
+ cstring msg = cstring_undefined;
+ int nval = stateCombinationTable_lookup (sctable,
+ stateValue_getValue (sval),
+ stateValue_getValue (tval),
+ &msg);
+ DPRINTF (("Combining: %s + %s -> %d",
+ stateValue_unparseValue (sval, msinfo),
+ stateValue_unparseValue (tval, msinfo),
+ nval));
+
+ if (nval == stateValue_error)
+ {
+ if (optgenerror
+ (FLG_STATEMERGE,
+ message
+ ("Attributes merged in ensures clause in states that "
+ "cannot be combined (%q is %q, %q is %q)%q",
+ sRef_unparse (lastref),
+ stateValue_unparseValue (sval, msinfo),
+ sRef_unparse (fs),
+ stateValue_unparseValue (tval, msinfo),
+ cstring_isDefined (msg) ?
+ message (": %s", msg) : cstring_undefined),
+ exprNode_loc (f)))
+ {
+ sRef_showMetaStateInfo (fs, key);
+ }
+ }
+
+ stateValue_updateValueLoc (sval, nval, fileloc_undefined);
+ loc = exprNode_loc (arg);
+ }
+ else
+ {
+ DPRINTF (("No value for: %s:%s", sRef_unparse (fs), key));
+ }
+ }
+ else
+ {
+ sval = sRef_getMetaStateValue (fs, key);
+ }
+
+ lastref = fs;
+
+ if (stateValue_isError (sval))
+ {
+ /*@innerbreak@*/ break; /* Don't merge any more values if here was an error */
+ }
+
+
+ paramno++;
+ }
+ }
+ else
+ {
+ msr = metaStateSpecifier_getSref (ms);
+
+
+ llassert (sRef_isParam (sRef_getRootBase (msr)));
+ fs = sRef_fixBaseParam (msr, args);
+
+ if (stateValue_isDefined (sval))
+ {
+ /* Use combination table to merge old state value with new one: */
+ stateValue tval = sRef_getMetaStateValue (fs, key);
+
+ if (stateValue_isDefined (tval))
+ {
+ stateCombinationTable sctable = metaStateInfo_getMergeTable (msinfo);
+ cstring msg = cstring_undefined;
+ int nval = stateCombinationTable_lookup (sctable,
+ stateValue_getValue (sval),
+ stateValue_getValue (tval),
+ &msg);
+ DPRINTF (("Combining: %s + %s -> %d",
+ stateValue_unparseValue (sval, msinfo),
+ stateValue_unparseValue (tval, msinfo),
+ nval));
- DPRINTF (("Reflecting state clause on: %s / %s",
- sRef_unparse (sel), sRef_unparse (s)));
+ if (nval == stateValue_error)
+ {
+ if (optgenerror
+ (FLG_STATEMERGE,
+ message
+ ("Attributes merged in ensures clause in states that "
+ "cannot be combined (%q is %q, %q is %q)%q",
+ sRef_unparse (lastref),
+ stateValue_unparseValue (sval, msinfo),
+ sRef_unparse (fs),
+ stateValue_unparseValue (tval, msinfo),
+ cstring_isDefined (msg)
+ ? message (": %s", msg) : cstring_undefined),
+ exprNode_loc (f)))
+ {
+ sRef_showMetaStateInfo (fs, key);
+ }
+ }
- modf (s, eparam, exprNode_loc (f));
+ stateValue_updateValueLoc (sval, nval, fileloc_undefined);
}
- } end_sRefSet_elements;
+ else
+ {
+ DPRINTF (("No value for: %s:%s", sRef_unparse (fs), key));
+ }
+ }
+ else
+ {
+ sval = sRef_getMetaStateValue (fs, key);
+ }
+
+ lastref = fs;
+
+ if (stateValue_isError (sval))
+ {
+ /*@innerbreak@*/ break; /* Don't merge any more values if here was an error */
+ }
}
}
- } end_stateClauseList_elements ;
-
+
+ DPRINTF (("Setting: %s:%s <- %s", sRef_unparse (s), key, stateValue_unparse (sval)));
+
+ if (stateValue_isDefined (sval))
+ {
+ sRef_setMetaStateValueComplete (s, key, stateValue_getValue (sval), loc);
+ }
+ else
+ {
+ DPRINTF (("Undefined state: %s", cstring_toCharsSafe (sRef_unparse (s))));
+ }
+ } end_metaStateConstraintList_elements ;
+
+ metaStateConstraintList_free (mscl);
}
}
}
if (sRef_isResult (sRef_getRootBase (sel)))
{
- ; /*@i423 what do we do about results */
+ BADBRANCH;
}
else
{
stateClause_unparse (cl),
sRefSet_unparse (srs)));
+ llassert (modf != NULL);
+
sRefSet_elements (srs, sel)
{
sRef s;
checkRequiresClause (le, f, args);
setCodePoint ();
- DPRINTF (("Reflect: %s", uentry_unparseFull (le)));
- reflectEnsuresClause (le, f, args);
- setCodePoint ();
-
if (uentry_isValid (le)
&& (uentry_isFunction (le)
|| (uentry_isVariable (le)
/* f->typ is already set to the return type */
+ DPRINTF (("Function: %s", uentry_unparseFull (le)));
ret->sref = uentry_returnedRef (le, args);
DPRINTF (("Returned: %s / %s",
uentry_unparseFull (le),
sRef_unparseFull (ret->sref)));
-
+
if (uentry_isFunction (le) && exprNodeList_size (args) >= 1)
{
qual nullPred = uentry_nullPred (le);
exprNode_checkSetAny (ret, uentry_rawName (le));
}
+ DPRINTF (("Before reflect: %s", sRef_unparseFull (ret->sref)));
+ DPRINTF (("Reflect: %s", uentry_unparseFull (le)));
+ reflectEnsuresClause (ret, le, f, args);
+ setCodePoint ();
+
return (ret);
}
** this is yucky! should keep the uentry as part of exprNode!
*/
-/*@observer@*/ uentry
-exprNode_getUentry (exprNode e)
+uentry exprNode_getUentry (exprNode e)
{
if (exprNode_isError (e))
{
}
}
+/*
+** Returns true iff e1 and e2 are both exactly the same storage
+** (conservative).
+*/
+
+static bool exprNode_sameStorage (exprNode e1, exprNode e2)
+{
+ sRef s1 = exprNode_getSref (e1);
+ sRef s2 = exprNode_getSref (e2);
+
+ return (sRef_realSame (s1, s2));
+}
+
exprNode
exprNode_makeInitBlock (lltok brace, /*@only@*/ exprNodeList inits)
{
/* added 7/11/2000 D.L */
/*@i223*/
- /*DRL 6/8/01 I decided to disable all LCLint Warning here since the code
+ /*DRL 6/8/01 I decided to disable all Splint warnings here since the code
probably needs a rewrite any way */
+ /*@i65234@*/
/*@ignore@*/
- // updateEnvironmentForPostOp (e);
-
- /* start modifications */
- /* added by Seejo on 4/16/2000 */
-
- /* Arithmetic operations on pointers wil modify the size/len/null terminated
- status */
- if ((sRef_isPossiblyNullTerminated (e->sref)) || (sRef_isNullTerminated(e->sref))) {
-
- ret->sref = sRef_copy (e->sref);
-
- /* Operator : ++ */
- if (lltok_getTok (op) == INC_OP) {
- if (sRef_getSize(e->sref) > 0) {
-
- sRef_setSize (ret->sref, sRef_getSize(e->sref) - 1);
-
- if (sRef_getLen(e->sref) == 1) { /* i.e. the first character is \0 */
- /* Assumption: there is only 1 \0 in the buffer */
- /* This will not be correct if there are 2 \0's in the buffer */
- sRef_setNotNullTerminatedState(ret->sref);
- sRef_resetLen(ret->sref);
- } else {
- sRef_setNullTerminatedState(ret->sref);
- sRef_setLen (ret->sref, sRef_getLen(e->sref) - 1);
- }
- if (sRef_isNullTerminated (ret->sref))
- printf ("ret->sref is Null Terminated\n");
- else if (sRef_isPossiblyNullTerminated (ret->sref))
- printf ("ret->sref is Possibly Null Terminated\n");
- else if (sRef_isNotNullTerminated (ret->sref))
- printf ("ret->sref is Not Null Terminated\n");
- }
- }
-
- /* Operator : -- */
- if (lltok_getTok (op) == DEC_OP) {
- if (sRef_getSize(e->sref) >= 0) {
- sRef_setSize (ret->sref, sRef_getSize(e->sref) + 1);
- sRef_setLen (ret->sref, sRef_getLen(e->sref) + 1);
- }
- }
- }
- /*@end@*/
- /* end modifications */
+ /* updateEnvironmentForPostOp (e); */
+
+ /* start modifications */
+ /* added by Seejo on 4/16/2000 */
+
+ /* Arithmetic operations on pointers wil modify the size/len/null terminated
+ status */
+ if ((sRef_isPossiblyNullTerminated (e->sref)) || (sRef_isNullTerminated(e->sref))) {
+
+ ret->sref = sRef_copy (e->sref);
+
+ /* Operator : ++ */
+ if (lltok_getTok (op) == INC_OP) {
+ if (sRef_getSize(e->sref) > 0) {
+
+ sRef_setSize (ret->sref, sRef_getSize(e->sref) - 1);
+
+ if (sRef_getLen(e->sref) == 1) { /* i.e. the first character is \0 */
+ /* Assumption: there is only 1 \0 in the buffer */
+ /* This will not be correct if there are 2 \0's in the buffer */
+ sRef_setNotNullTerminatedState(ret->sref);
+ sRef_resetLen(ret->sref);
+ } else {
+ sRef_setNullTerminatedState(ret->sref);
+ sRef_setLen (ret->sref, sRef_getLen(e->sref) - 1);
+ }
+ if (sRef_isNullTerminated (ret->sref))
+ printf ("ret->sref is Null Terminated\n");
+ else if (sRef_isPossiblyNullTerminated (ret->sref))
+ printf ("ret->sref is Possibly Null Terminated\n");
+ else if (sRef_isNotNullTerminated (ret->sref))
+ printf ("ret->sref is Not Null Terminated\n");
+ }
+ }
+
+ /* Operator : -- */
+ if (lltok_getTok (op) == DEC_OP) {
+ if (sRef_getSize(e->sref) >= 0) {
+ sRef_setSize (ret->sref, sRef_getSize(e->sref) + 1);
+ sRef_setLen (ret->sref, sRef_getLen(e->sref) + 1);
+ }
+ }
+ }
+ /*@end@*/
+ /* end modifications */
return ret;
}
if (sRef_isKnown (e->sref))
{
+ DPRINTF (("Checking possibly null: %s", sRef_unparseFull (e->sref)));
+
if (sRef_possiblyNull (e->sref))
{
+ DPRINTF (("Checking possibly null: %s", sRef_unparse (e->sref)));
if (!usymtab_isGuarded (e->sref) && !context_inProtectVars ())
{
if (optgenerror
}
else
{
- sizet = ctype_ulint;
+ sizet = ctype_ulint;
}
}
return sizet;
}
ret->val = multiVal_undefined;
+
ret->kind = XPR_OP;
ret->edata = exprData_makeOp (e1, e2, op);
tret = ctype_unknown;
te1 = exprNode_getType (e1);
+
DPRINTF (("te1 = %s / %s", exprNode_unparse (e1), ctype_unparse (te1)));
te2 = exprNode_getType (e2);
case TDIV: /* */
case MUL_ASSIGN: /* numeric, numeric -> numeric */
case DIV_ASSIGN: /* */
-
+
+ if (opid == TMULT || opid == MUL_ASSIGN)
+ {
+ ret->val = multiVal_multiply (exprNode_getValue (e1),
+ exprNode_getValue (e2));
+ }
+ else
+ {
+ ret->val = multiVal_divide (exprNode_getValue (e1),
+ exprNode_getValue (e2));
+ }
+
tret = checkNumerics (tr1, tr2, te1, te2, e1, e2, op);
break;
case TMINUS: /* pointer, int -> pointer */
case SUB_ASSIGN: /* int, pointer -> pointer */
case ADD_ASSIGN: /* numeric, numeric -> numeric */
-
+
+ if (opid == TPLUS || opid == ADD_ASSIGN)
+ {
+ ret->val = multiVal_add (exprNode_getValue (e1),
+ exprNode_getValue (e2));
+ }
+ else
+ {
+ ret->val = multiVal_subtract (exprNode_getValue (e1),
+ exprNode_getValue (e2));
+ }
+
tr1 = ctype_fixArrayPtr (tr1);
if ((ctype_isRealPointer (tr1) && !exprNode_isNullValue (e1))
e1->loc);
}
+ /*
+ ** Swap terms so e1 is always the pointer
+ */
+
+ if (ctype_isRealPointer (tr1))
+ {
+ ;
+ }
+ else
+ {
+ exprNode_swap (e1, e2);
+ }
+
+
if (sRef_possiblyNull (e1->sref)
&& !usymtab_isGuarded (e1->sref))
{
ret->sref = sRef_copy (e1->sref);
- /* start modifications */
- /* added by Seejo on 4/16/2000 */
-
- /* Arithmetic operations on pointers wil modify the size/len/null terminated
- status */
- if ((sRef_isPossiblyNullTerminated (e1->sref)) || (sRef_isNullTerminated(e1->sref))) {
- //if (sRef_isKnown (e->sref)) {
- //ret->sref = sRef_makeAddress (e->sref);
- //}
-
- int val;
- /*drl 1-4-2001
- added ugly fixed to stop
- program from crashing on point + int +int
- one day I'll fix this or ask Seejo wtf the codes supposed to do. */
-
- if (!multiVal_isInt (e2->val) )
- break;
- /*end drl*/
+ /* start modifications */
+ /* added by Seejo on 4/16/2000 */
+
+ /* Arithmetic operations on pointers wil modify the size/len/null terminated
+ status */
+ if ((sRef_isPossiblyNullTerminated (e1->sref)) || (sRef_isNullTerminated(e1->sref))) {
+ int val;
+ /*drl 1-4-2002
+ added ugly fixed to stop
+ program from crashing on point + int +int
+ one day I'll fix this or ask Seejo wtf the codes supposed to do. */
+
+ if (!multiVal_isInt (e2->val) )
+ break;
+ /*end drl*/
+
+ val = (int) multiVal_forceInt (e2->val);
+
+ /* Operator : + or += */
+ if ((lltok_getTok (op) == TPLUS) || (lltok_getTok(op) == ADD_ASSIGN)) {
+ if (sRef_getSize(e1->sref) >= val) {/* Incrementing the pointer by
+ val should not result in a
+ size < 0 (size = 0 is ok !) */
+
+ sRef_setSize (ret->sref, sRef_getSize(e1->sref) - val);
+
+ if (sRef_getLen(e1->sref) == val) { /* i.e. the character at posn val is \0 */
+ sRef_setNotNullTerminatedState(ret->sref);
+ sRef_resetLen (ret->sref);
+ } else {
+ sRef_setNullTerminatedState(ret->sref);
+ sRef_setLen (ret->sref, sRef_getLen(e1->sref) - val);
+ }
+ }
+ }
+
+ /* Operator : - or -= */
+ if ((lltok_getTok (op) == TMINUS) || (lltok_getTok (op) == SUB_ASSIGN)) {
+ if (sRef_getSize(e1->sref) >= 0) {
+ sRef_setSize (ret->sref, sRef_getSize(e1->sref) + val);
+ sRef_setLen (ret->sref, sRef_getLen(e1->sref) + val);
+ }
+ }
+ }
- val = (int) multiVal_forceInt (e2->val);
-
- /* Operator : + or += */
- if ((lltok_getTok (op) == TPLUS) || (lltok_getTok(op) == ADD_ASSIGN)) {
- if (sRef_getSize(e1->sref) >= val) {/* Incrementing the pointer by
- val should not result in a
- size < 0 (size = 0 is ok !) */
-
- sRef_setSize (ret->sref, sRef_getSize(e1->sref) - val);
-
- if (sRef_getLen(e1->sref) == val) { /* i.e. the character at posn val is \0 */
- sRef_setNotNullTerminatedState(ret->sref);
- sRef_resetLen (ret->sref);
- } else {
- sRef_setNullTerminatedState(ret->sref);
- sRef_setLen (ret->sref, sRef_getLen(e1->sref) - val);
- }
- }
- }
-
- /* Operator : - or -= */
- if ((lltok_getTok (op) == TMINUS) || (lltok_getTok (op) == SUB_ASSIGN)) {
- if (sRef_getSize(e1->sref) >= 0) {
- sRef_setSize (ret->sref, sRef_getSize(e1->sref) + val);
- sRef_setLen (ret->sref, sRef_getLen(e1->sref) + val);
- }
- }
- }
-
- /* end modifications */
+ /* end modifications */
sRef_setNullError (ret->sref);
(FLG_NULLPOINTERARITH,
message ("Pointer arithmetic involving possibly "
"null pointer %s: %s",
- exprNode_unparse (e2),
- exprNode_unparse (ret)),
- e2->loc);
- }
-
- ret->sref = sRef_copy (e2->sref);
-
- /* start modifications */
- /* added by Seejo on 4/16/2000 */
-
- /* Arithmetic operations on pointers wil modify the size/len/null terminated
- status */
-
- if ((sRef_isPossiblyNullTerminated (e2->sref)) || (sRef_isNullTerminated(e2->sref))) {
- //if (sRef_isKnown (e->sref)) {
- //ret->sref = sRef_makeAddress (e->sref);
- //}
-
- int val = (int) multiVal_forceInt (e1->val);
-
- /* Operator : + or += */
- if ((lltok_getTok (op) == TPLUS) || (lltok_getTok(op) == ADD_ASSIGN)) {
- if (sRef_getSize(e2->sref) >= val) {/* Incrementing the pointer by
- val should not result in a
- size < 0 (size = 0 is ok !) */
-
- sRef_setSize (ret->sref, sRef_getSize(e2->sref) - val);
-
- if (sRef_getLen(e2->sref) == val) { /* i.e. the character at posn val is \0 */
- sRef_setNotNullTerminatedState(ret->sref);
- sRef_resetLen (ret->sref);
- } else {
- sRef_setNullTerminatedState(ret->sref);
- sRef_setLen (ret->sref, sRef_getLen(e2->sref) - val);
- }
- }
- }
-
- /* Operator : - or -= */
- if ((lltok_getTok (op) == TMINUS) || (lltok_getTok (op) == SUB_ASSIGN)) {
- if (sRef_getSize(e2->sref) >= 0) {
- sRef_setSize (ret->sref, sRef_getSize(e2->sref) + val);
- sRef_setLen (ret->sref, sRef_getLen(e2->sref) + val);
- }
- }
- }
+ exprNode_unparse (e2),
+ exprNode_unparse (ret)),
+ e2->loc);
+ }
- /* end modifications */
+ ret->sref = sRef_copy (e2->sref);
+ /* start modifications */
+ /* added by Seejo on 4/16/2000 */
+
+ /* Arithmetic operations on pointers wil modify the size/len/null terminated
+ status */
+
+ if ((sRef_isPossiblyNullTerminated (e2->sref)) || (sRef_isNullTerminated(e2->sref))) {
+ int val = (int) multiVal_forceInt (e1->val);
+
+ /* Operator : + or += */
+ if ((lltok_getTok (op) == TPLUS) || (lltok_getTok(op) == ADD_ASSIGN)) {
+ if (sRef_getSize(e2->sref) >= val) {/* Incrementing the pointer by
+ val should not result in a
+ size < 0 (size = 0 is ok !) */
+
+ sRef_setSize (ret->sref, sRef_getSize(e2->sref) - val);
+
+ if (sRef_getLen(e2->sref) == val) { /* i.e. the character at posn val is \0 */
+ sRef_setNotNullTerminatedState(ret->sref);
+ sRef_resetLen (ret->sref);
+ } else {
+ sRef_setNullTerminatedState(ret->sref);
+ sRef_setLen (ret->sref, sRef_getLen(e2->sref) - val);
+ }
+ }
+ }
+
+ /* Operator : - or -= */
+ if ((lltok_getTok (op) == TMINUS) || (lltok_getTok (op) == SUB_ASSIGN)) {
+ if (sRef_getSize(e2->sref) >= 0) {
+ sRef_setSize (ret->sref, sRef_getSize(e2->sref) + val);
+ sRef_setLen (ret->sref, sRef_getLen(e2->sref) + val);
+ }
+ }
+ }
+ /* end modifications */
+
sRef_setNullError (ret->sref);
-
+
/*
** Fixed for 2.2c: the alias state of ptr + int is dependent,
** since is points to storage that should not be deallocated
** through this pointer.
*/
-
+
if (sRef_isOnly (ret->sref)
|| sRef_isFresh (ret->sref)) {
sRef_setAliasKind (ret->sref, AK_DEPENDENT, exprNode_loc (ret));
}
-
+
tret = e2->typ;
ret->sref = e2->sref;
}
break;
- case LEFT_ASSIGN: /* Shifts: should be unsigned values */
+ case LEFT_ASSIGN:
case RIGHT_ASSIGN:
case LEFT_OP:
case RIGHT_OP:
case OR_ASSIGN:
{
bool reported = FALSE;
- flagcode code = FLG_BITWISEOPS;
- if (opid == LEFT_OP || opid == LEFT_ASSIGN
- || opid == RIGHT_OP || opid == RIGHT_ASSIGN) {
- code = FLG_SHIFTSIGNED;
- }
+ /*
+ ** Shift Operator
+ */
- if (!ctype_isUnsigned (tr1))
+ if (opid == LEFT_OP || opid == LEFT_ASSIGN
+ || opid == RIGHT_OP || opid == RIGHT_ASSIGN)
{
- if (exprNode_isNonNegative (e1)) {
- ;
- } else {
- reported = optgenerror
- (code,
- message ("Left operand of %s is not unsigned value (%t): %s",
- lltok_unparse (op), te1,
- exprNode_unparse (ret)),
- e1->loc);
-
- if (reported) {
- te1 = ctype_uint;
+ /*
+ ** evans 2002-01-01: fixed this to follow ISO 6.5.7.
+ */
+
+ if (!ctype_isUnsigned (tr2)
+ && !exprNode_isNonNegative (e2))
+ {
+ reported = optgenerror
+ (FLG_SHIFTNEGATIVE,
+ message ("Right operand of %s may be negative (%t): %s",
+ lltok_unparse (op), te2,
+ exprNode_unparse (ret)),
+ e2->loc);
}
- }
+
+ if (!ctype_isUnsigned (tr1)
+ && !exprNode_isNonNegative (e1))
+ {
+ reported = optgenerror
+ (FLG_SHIFTIMPLEMENTATION,
+ message ("Left operand of %s may be negative (%t): %s",
+ lltok_unparse (op), te1,
+ exprNode_unparse (ret)),
+ e1->loc);
+ }
+
+ /*
+ ** Should check size of right operand also...
+ */
+
}
- else
+ else
{
- /* right need not be signed for shifts */
- if (code != FLG_SHIFTSIGNED
- && !ctype_isUnsigned (tr2))
+ if (!ctype_isUnsigned (tr1))
{
- if (!exprNode_isNonNegative (e2)) {
+ if (exprNode_isNonNegative (e1)) {
+ ;
+ } else {
reported = optgenerror
- (code,
- message ("Right operand of %s is not unsigned value (%t): %s",
- lltok_unparse (op), te2,
+ (FLG_BITWISEOPS,
+ message ("Left operand of %s is not unsigned value (%t): %s",
+ lltok_unparse (op), te1,
exprNode_unparse (ret)),
- e2->loc);
+ e1->loc);
+
+ if (reported) {
+ te1 = ctype_uint;
+ }
}
}
+ else
+ {
+ if (!ctype_isUnsigned (tr2))
+ {
+ if (!exprNode_isNonNegative (e2)) {
+ reported = optgenerror
+ (FLG_BITWISEOPS,
+ message ("Right operand of %s is not unsigned value (%t): %s",
+ lltok_unparse (op), te2,
+ exprNode_unparse (ret)),
+ e2->loc);
+ }
+ }
+ }
}
-
+
if (!reported)
{
if (!checkIntegral (e1, e2, ret, op)) {
case NE_OP:
case TLT: /* comparisons */
case TGT: /* numeric, numeric -> bool */
+
+ DPRINTF (("Here we go: %s / %s",
+ ctype_unparse (tr1), ctype_unparse (tr2)));
+
if ((ctype_isReal (tr1) && !ctype_isInt (tr1))
|| (ctype_isReal (tr2) && !ctype_isInt (tr2)))
{
** Types should match.
*/
+ DPRINTF (("Match types: %s / %s", exprNode_unparse (e1),
+ exprNode_unparse (e2)));
+
if (!exprNode_matchTypes (e1, e2))
{
hasError = gentypeerror
tret = ctype_bool;
}
+ /* certain comparisons on unsigned's and zero look suspicious */
+
+ if (opid == TLT || opid == LE_OP || opid == GE_OP)
+ {
+ if ((ctype_isUnsigned (tr1) && exprNode_isZero (e2))
+ || (ctype_isUnsigned (tr2) && exprNode_isZero (e1)))
+ {
+ voptgenerror
+ (FLG_UNSIGNEDCOMPARE,
+ message ("Comparison of unsigned value involving zero: %s",
+ exprNode_unparse (ret)),
+ e1->loc);
+ }
+ }
+
/* EQ_OP should NOT be used with booleans (unless one is FALSE) */
if ((opid == EQ_OP || opid == NE_OP) &&
llfatalbug
(cstring_makeLiteral
("There has been a problem in the parser. This is believed to result "
- "from a problem with bison v. 1.25. Please try rebuidling LCLint "
+ "from a problem with bison v. 1.25. Please try rebuidling Splint "
"using the pre-compiled grammar files by commenting out the "
"BISON= line in the top-level Makefile."));
}
}
exprNode
-exprNode_assign (/*@only@*/ exprNode e1,
- /*@only@*/ exprNode e2, /*@only@*/ lltok op)
+exprNode_assign (/*@only@*/ exprNode e1, /*@only@*/ exprNode e2, /*@only@*/ lltok op)
{
bool isalloc = FALSE;
bool isjustalloc = FALSE;
+ bool noalias = FALSE;
exprNode ret;
DPRINTF (("%s [%s] <- %s [%s]",
if (lltok_getTok (op) != TASSIGN)
{
ret = exprNode_makeOp (e1, e2, op);
- }
+
+ DPRINTF (("Here goes: %s %s",
+ ctype_unparse (e1->typ),
+ ctype_unparse (e2->typ)));
+
+ if (exprNode_isDefined (e1)
+ && exprNode_isDefined (e2))
+ {
+ if (ctype_isNumeric (e2->typ)
+ || ctype_isNumeric (e1->typ))
+ {
+ /* Its a pointer arithmetic expression like ptr += i */
+ noalias = TRUE;
+ }
+ }
+ }
else
{
ret = exprNode_createPartialCopy (e1);
sRef_unparse (e1->sref)),
g_currentloc);
}
+
+ exprNode_checkAssignMod (e1, ret); /* evans 2001-07-22 */
}
}
else
ctype te1 = exprNode_getType (e1);
ctype te2 = exprNode_getType (e2);
- if (!ctype_forceMatch (te1, te2))
+ if (ctype_isVoid (te2))
+ {
+ (void) gentypeerror
+ (te2, e2, te1, e1,
+ message ("Assignment of void value to %t: %s %s %s",
+ te1, exprNode_unparse (e1),
+ lltok_unparse (op),
+ exprNode_unparse (e2)),
+ e1->loc);
+ }
+ else if (!ctype_forceMatch (te1, te2))
{
if (exprNode_matchLiteral (te1, e2))
{
e1->loc);
}
}
+ else
+ {
+ /* Type checks okay */
+ }
}
exprNode_mergeUSs (ret, e2);
exprNode_checkUse (ret, e2->sref, e2->loc);
- doAssign (e1, e2, FALSE);
+ DPRINTF (("Do assign! %s %s", exprNode_unparse (e1), exprNode_unparse (e2)));
+ if (noalias)
+ {
+ ;
+ }
+ else
+ {
+ doAssign (e1, e2, FALSE);
+ }
+
ret->sref = e1->sref;
}
else
if (exprNode_isDefined (e2))
{
exprNode_mergeUSs (ret, e2);
- exprNode_checkUse (ret, e2->sref, e2->loc);
+ exprNode_checkUse (ret, e2->sref, e2->loc);
}
}
/*
** be careful! this defines e1->sref.
*/
-
- if (!sRef_isMacroParamRef (e1->sref))
- {
- exprNode_checkSet (ret, e1->sref);
- }
+
+ /* evans 2001-07-22: removed if (!sRef_isMacroParamRef (e1->sref)) */
+
+ DPRINTF (("Setting: %s -> %s", exprNode_unparse (ret), sRef_unparse (e1->sref)));
+ exprNode_checkSet (ret, e1->sref);
if (isjustalloc)
{
}
else /* all errors! */
{
- ret = exprNode_createLoc (ctype_unknown, g_currentloc);
+ ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
}
}
{
return e->mustBreak;
}
+
return FALSE;
}
{
voptgenerror (FLG_CASEBREAK,
cstring_makeLiteral
- ("Fall through case (no preceeding break)"),
+ ("Fall through case (no preceding break)"),
e2->loc);
}
}
usymtab_setMustBreak ();
}
+ DPRINTF (("==> %s", exprNode_unparse (ret)));
return ret;
}
{
if (!exprNode_isError (e))
{
- exprNode_checkStatement(e);
+ exprChecks_checkStatementEffect(e);
}
return (exprNode_statementError (e, t));
}
}
+exprNode exprNode_compoundStatementExpression (/*@only@*/ lltok tlparen, /*@only@*/ exprNode e)
+{
+ exprNode laststmt;
+
+ DPRINTF (("Compound: %s", exprNode_unparse (e)));
+
+ if (!context_flagOn (FLG_GNUEXTENSIONS, exprNode_loc (e)))
+ {
+ (void) llgenhinterror
+ (FLG_SYNTAX,
+ message ("Compound statement expressions is not supported by ISO C99"),
+ message ("Use +gnuextensions to allow compound statement expressions (and other GNU language extensions) "
+ "without this warning"),
+ exprNode_loc (e));
+ }
+
+ /*
+ ** The type of a compoundStatementExpression is the type of the last statement
+ */
+
+ llassert (exprNode_isBlock (e));
+ laststmt = exprNode_lastStatement (e);
+
+ DPRINTF (("Last statement: %s / %s", exprNode_unparse (laststmt), ctype_unparse (exprNode_getType (laststmt))));
+ DPRINTF (("e: %s", exprNode_unparse (e)));
+ e->typ = exprNode_getType (laststmt);
+ return exprNode_addParens (tlparen, e);
+}
+
+
exprNode exprNode_makeBlock (/*@only@*/ exprNode e)
{
exprNode ret = exprNode_createPartialCopy (e);
ret->mustBreak = e->mustBreak;
}
+ DPRINTF (("Block e: %s", exprNode_unparse (e)));
ret->edata = exprData_makeSingle (e);
ret->kind = XPR_BLOCK;
+ DPRINTF (("Block: %s", exprNode_unparse (ret)));
return ret;
}
return (exprNode_isDefined (e)
&& ((e)->kind == XPR_BLOCK));
}
+
+bool exprNode_isStatement (exprNode e)
+{
+ return (exprNode_isDefined (e)
+ && ((e)->kind == XPR_STMT));
+}
bool exprNode_isAssign (exprNode e)
{
&& (lltok_isSemi (exprData_getTok (e->edata))));
}
+bool exprNode_isMultiStatement (exprNode e)
+{
+ return (exprNode_isDefined (e)
+ && ((e->kind == XPR_FOR)
+ || (e->kind == XPR_FORPRED)
+ || (e->kind == XPR_IF)
+ || (e->kind == XPR_IFELSE)
+ || (e->kind == XPR_WHILE)
+ || (e->kind == XPR_WHILEPRED)
+ || (e->kind == XPR_DOWHILE)
+ || (e->kind == XPR_BLOCK)
+ || (e->kind == XPR_STMT)
+ || (e->kind == XPR_STMTLIST)
+ || (e->kind == XPR_SWITCH)));
+}
+
+void exprNode_checkIfPred (exprNode pred)
+{
+ exprNode_checkPred (cstring_makeLiteralTemp ("if"), pred);
+}
+
exprNode exprNode_if (/*@only@*/ exprNode pred, /*@only@*/ exprNode tclause)
{
exprNode ret;
{
if (exprNode_isError (tclause))
{
- ret = exprNode_createLoc (ctype_unknown, g_currentloc);
+ ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
}
else
{
message ("Predicate always exits: %s", exprNode_unparse (pred)),
exprNode_loc (pred));
}
-
- exprNode_checkPred (cstring_makeLiteralTemp ("if"), pred);
+
+ /*! exprNode_checkPred (cstring_makeLiteralTemp ("if"), pred); */ /*@i523@*/
exprNode_checkUse (pred, pred->sref, pred->loc);
if (!exprNode_isError (tclause))
{
if (exprNode_isError (eclause))
{
- ret = exprNode_createLoc (ctype_unknown, g_currentloc);
+ ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
}
else
{
exprNode_loc (pred));
}
- exprNode_checkPred (cstring_makeLiteralTemp ("if"), pred);
+ /*@i3423 exprNode_checkPred (cstring_makeLiteralTemp ("if"), pred);*/
exprNode_checkUse (ret, pred->sref, pred->loc);
exprNode_mergeCondUSs (ret, tclause, eclause);
exprNodeSList_elements (el, current)
{
+
+ DPRINTF ((message("checkSwitchExpr current = %s ", exprNode_unparse(current) ) ));
+
if (exprNode_isDefined (current))
{
switch (current->kind)
if (hasDefault)
{
voptgenerror
- (FLG_CONTROL,
+ (FLG_DUPLICATECASES,
message ("Duplicate default cases in switch"),
exprNode_loc (current));
}
(/*@-usedef@*/usedEnums/*@=usedef@*/, cname))
{
voptgenerror
- (FLG_CONTROL,
+ (FLG_DUPLICATECASES,
message ("Duplicate case in switch: %s",
cname),
current->loc);
g_currentloc);
enumNameSList_free (unused);
+ *allpaths = FALSE; /* evans 2002-01-01 */
}
else
{
{
if (exprNode_isError (b))
{
- ret = exprNode_createLoc (ctype_unknown, g_currentloc);
+ ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
}
else
{
if (exprNode_isDefined (t) && exprNode_mustEscape (t))
{
voptgenerror
- (FLG_CONTROL,
+ (FLG_ALWAYSEXITS,
message ("Predicate always exits: %s", exprNode_unparse (t)),
exprNode_loc (t));
}
exprNode exprNode_doWhile (/*@only@*/ exprNode b, /*@only@*/ exprNode t)
{
exprNode ret;
-
+
+ DPRINTF (("Do while: %s / %s",
+ exprNode_unparse (b), exprNode_unparse (t)));
+
if (exprNode_isError (t))
{
if (exprNode_isError (b))
{
- ret = exprNode_createLoc (ctype_unknown, g_currentloc);
+ ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
}
else
{
exprNode_checkUse (ret, b->sref, b->loc);
ret->exitCode = b->exitCode;
ret->canBreak = b->canBreak;
- ret->mustBreak = b->mustBreak;
+ ret->mustBreak = FALSE;
}
}
else
{
+ DPRINTF (("Do while: %s / %s",
+ exitkind_unparse (t->exitCode),
+ exitkind_unparse (b->exitCode)));
+
ret = exprNode_createPartialCopy (t);
exprNode_checkPred (cstring_makeLiteralTemp ("while"), t);
exprNode_mergeUSs (ret, t);
exprNode_checkUse (ret, t->sref, t->loc);
- ret->exitCode = b->exitCode;
+ /* evans 2001-10-05: while loop can break */
+ ret->exitCode = exitkind_makeConditional (b->exitCode);
+
+ DPRINTF (("Do while: %s",
+ exitkind_unparse (ret->exitCode)));
+
ret->canBreak = b->canBreak;
- ret->mustBreak = b->mustBreak;
+
+ /* Always FALSE for doWhile loops - break's when test is false */
+ ret->mustBreak = FALSE; /* b->mustBreak; */
}
}
ret->kind = XPR_DOWHILE;
ret->edata = exprData_makePair (t, b);
- return ret;
+ return ret;
+}
+
+bool exprNode_loopMustExec (exprNode forPred)
+{
+ /*
+ ** Returns true if it is obvious that the loop always executes at least once
+ **
+ ** For now, we only identify the most obvious cases. Should be true anytime
+ ** we can prove init => !test.
+ */
+
+ if (exprNode_isDefined (forPred))
+ {
+ exprNode init, test, inc;
+ exprData edata;
+
+ llassert (forPred->kind == XPR_FORPRED);
+
+ edata = forPred->edata;
+ init = exprData_getTripleInit (edata);
+ test = exprData_getTripleTest (edata);
+ inc = exprData_getTripleInc (edata);
+
+ if (exprNode_isAssign (init))
+ {
+ exprNode loopVar = exprData_getOpA (init->edata);
+ exprNode loopInit = exprData_getOpB (init->edata);
+
+ if (exprNode_isDefined (test) && test->kind == XPR_OP)
+ {
+ exprNode testVar = exprData_getOpA (test->edata);
+ exprNode testVal = exprData_getOpB (test->edata);
+ lltok comp = exprData_getOpTok (test->edata);
+ int opid = lltok_getTok (comp);
+
+ DPRINTF (("Same storage: %s / %s", exprNode_unparse (loopVar),
+ exprNode_unparse (testVar)));
+
+ if (exprNode_sameStorage (loopVar, testVar))
+ {
+ multiVal valinit = exprNode_getValue (loopInit);
+ multiVal valtest = exprNode_getValue (testVal);
+
+ DPRINTF (("Values: %s / %s", multiVal_unparse (valinit),
+ multiVal_unparse (valtest)));
+
+ if (multiVal_isInt (valinit) && multiVal_isInt (valtest))
+ {
+ long v1 = multiVal_forceInt (valinit);
+ long v2 = multiVal_forceInt (valtest);
+
+ DPRINTF (("Here: %ld %ld", v1, v2));
+
+ if ((opid == EQ_OP && v1 < v2)
+ || (opid == NE_OP && v1 != v2)
+ || (opid == TLT && v1 <= v2)
+ || (opid == TGT && v1 >= v2)
+ || (opid == LE_OP && v1 < v2)
+ || (opid == GE_OP && v1 > v2))
+ {
+ DPRINTF (("mustexec if inc"));
+ return TRUE;
+ }
+ }
+ }
+ }
+ }
+ }
+
+ DPRINTF (("loop must exec: FALSE"));
+ return FALSE;
}
exprNode exprNode_for (/*@keep@*/ exprNode inc, /*@keep@*/ exprNode body)
ret->exitCode = exitkind_makeConditional (body->exitCode);
- exprNode_mergeUSs (inc, body);
+ exprNode_mergeUSs (inc, body);
if (exprNode_isDefined (inc))
{
exprNode tmp;
context_setMessageAnnote (cstring_makeLiteral ("in post loop increment"));
-
tmp = exprNode_effect (exprData_getTripleInc (inc->edata));
exprNode_freeShallow (tmp);
{
if (exprNode_isError (e2))
{
- ret = exprNode_createLoc (ctype_unknown, g_currentloc);
+ ret = exprNode_createLoc (ctype_unknown, fileloc_copy (g_currentloc));
}
else
{
ctype t2 = exprNode_getType (val);
bool hasError = FALSE;
+ DPRINTF (("Check one init: %s / %s",
+ exprNode_unparse (el),
+ exprNode_unparse (val)));
+
if (ctype_isUnknown (t1))
{
voptgenerror (FLG_IMPTYPE,
if (exprNode_isDefined (val) && val->kind == XPR_INITBLOCK)
{
exprNodeList vals = exprData_getArgs (val->edata);
+
+ DPRINTF (("Check one init: %s", exprNodeList_unparse (vals)));
+ DPRINTF (("Type: %s", ctype_unparse (t1)));
if (ctype_isRealAP (t1))
{
int i = 0;
int nerrors = 0;
+ if (ctype_isFixedArray (t1))
+ {
+ int nelements = long_toInt (ctype_getArraySize (t1));
+
+ DPRINTF (("Checked array: %s / %d",
+ ctype_unparse (t1), nelements));
+
+ if (exprNode_isStringLiteral (val))
+ {
+ exprNode_checkStringLiteralLength (t1, val);
+ }
+ else
+ {
+ if (exprNodeList_size (vals) != nelements)
+ {
+ hasError = optgenerror
+ (exprNodeList_size (vals) > nelements ? FLG_INITSIZE : FLG_INITALLELEMENTS,
+ message ("Initializer block for "
+ "%s has %d element%&, but declared as %s: %q",
+ exprNode_unparse (el),
+ exprNodeList_size (vals),
+ ctype_unparse (t1),
+ exprNodeList_unparse (vals)),
+ val->loc);
+ }
+ }
+ }
+
exprNodeList_elements (vals, oneval)
{
cstring istring = message ("%d", i);
} end_exprNodeList_elements;
}
}
+ /* evans 2001-12-30: added to fix bug reported by Jim Zelenka */
+ else if (ctype_isUnion (ctype_realType (t1)))
+ {
+ uentryList fields = ctype_getFields (t1);
+ int i = 0;
+
+ /*
+ ** Union initializers set the first member always.
+ */
+
+ DPRINTF (("Union initializer: %s / %s",
+ exprNode_unparse (el), ctype_unparse (ctype_realType (t1))));
+
+ if (exprNodeList_size (vals) != 1)
+ {
+ hasError = optgenerror
+ (FLG_TYPE,
+ message ("Initializer block for union "
+ "%s has %d elements, union initializers should have one element: %q",
+ exprNode_unparse (el),
+ exprNodeList_size (vals),
+ exprNodeList_unparse (vals)),
+ val->loc);
+ }
+ else
+ {
+ exprNode oneval = exprNodeList_head (vals);
+ uentry thisfield = uentryList_getN (fields, i);
+ exprNode newel =
+ exprNode_fieldAccessAux (exprNode_fakeCopy (el),
+ exprNode_loc (el),
+ uentry_getName (thisfield));
+
+ if (exprNode_isDefined (newel))
+ {
+ if (exprNode_checkOneInit (newel, oneval))
+ {
+ hasError = TRUE;
+ }
+
+ exprNode_freeIniter (newel);
+ }
+ }
+ }
else
{
hasError = optgenerror
return hasError;
}
-static exprNode
+static /*@notnull@*/ exprNode
exprNode_makeInitializationAux (/*@temp@*/ idDecl t)
{
exprNode ret;
+ DPRINTF (("Initialization: %s", idDecl_unparse (t)));
+
if (usymtab_exists (idDecl_observeId (t)))
{
uentry ue = usymtab_lookup (idDecl_observeId (t));
}
else
{
- uentry ue = uentry_makeUnrecognized (idDecl_observeId (t),
- g_currentloc);
+ uentry ue;
+
+ DPRINTF (("Unrecognized: %s", idDecl_unparse (t)));
+
+ ue = uentry_makeUnrecognized (idDecl_observeId (t), fileloc_copy (g_currentloc));
+ /*!! fileloc_copy (g_currentloc)); */
+ /*@i32!!! should get error without this */
+
ret = exprNode_fromIdentifierAux (ue);
/*
exprData_free (ret->edata, ret->kind);
ret->edata = exprData_undefined;
+
ret->exitCode = XK_NEVERESCAPE;
ret->mustBreak = FALSE;
ret->kind = XPR_INIT;
uentry ue = usymtab_lookup (idDecl_observeId (t));
exprNode ret = exprNode_makeInitializationAux (t);
fileloc loc = exprNode_loc (e);
-
+
if (exprNode_isError (e))
{
e = exprNode_createUnknown ();
{
sRef_setDefState (lhs->sref, SS_PARTIAL, fileloc_undefined);
}
-
+
(void) exprNode_checkOneInit (lhs, e);
if (uentry_isStatic (ue))
if (uentry_isInvalid (end))
{
- llerror (FLG_ITER,
+ llerror (FLG_ITERBALANCE,
message ("Iter %s not balanced with end_%s", iname, iname));
}
else
{
cstring ename = uentry_getName (end);
- if (!cstring_equalPrefix (ename, "end_"))
+ if (!cstring_equalPrefixLit (ename, "end_"))
{
- llerror (FLG_ITER, message ("Iter %s not balanced with end_%s: %s",
+ llerror (FLG_ITERBALANCE, message ("Iter %s not balanced with end_%s: %s",
iname, iname, ename));
}
else
{
if (!cstring_equal (iname, cstring_suffix (ename, 4)))
{
- llerror (FLG_ITER,
+ llerror (FLG_ITERBALANCE,
message ("Iter %s not balanced with end_%s: %s",
iname, iname, ename));
}
e->isJumpPoint = FALSE;
e->exitCode = XK_NEVERESCAPE;
- /*> missing fields, detected by lclint <*/
+ /*> missing fields, detected by splint <*/
e->canBreak = FALSE;
e->mustBreak = FALSE;
e->etext = cstring_undefined;
if (fileloc_isDefined (e->loc))
{
voptgenerror
- (FLG_ITER,
+ (FLG_ITERYIELD,
message ("Yield parameter is not simple identifier: %s",
exprNode_unparse (e)),
e->loc);
else
{
voptgenerror
- (FLG_ITER,
+ (FLG_ITERYIELD,
message ("Yield parameter is not simple identifier: %s",
exprNode_unparse (e)),
g_currentloc);
if (!context_inHeader ())
{
if (optgenerror
- (FLG_ITER,
+ (FLG_ITERYIELD,
message ("Yield parameter shadows local declaration: %q",
uentry_getName (c)),
fileloc_isDefined (e->loc) ? e->loc : g_currentloc))
case XPR_VAR:
ret = exprData_getId (data);
break;
+ case XPR_INIT:
+ ret = idDecl_getName (exprData_getInitId (data));
+ break;
case XPR_LABEL:
case XPR_TOK:
case XPR_ITERCALL:
case XPR_BLOCK:
case XPR_STMT:
case XPR_STMTLIST:
- case XPR_INIT:
case XPR_FACCESS:
case XPR_ARROW:
case XPR_NODE:
break;
case XPR_BLOCK:
- ret = message ("{ %s }", exprNode_unparseFirst (exprData_getSingle (data)));
+ ret = message ("{ %s }", exprNode_unparse (exprData_getSingle (data)));
+ /* evans 2002-02-20 was unparseFirst! */
break;
case XPR_STMT:
- ret = cstring_copy (exprNode_unparse (exprData_getUopNode (data)));
+ ret = message ("%s;", exprNode_unparse (exprData_getUopNode (data)));
break;
case XPR_STMTLIST:
- ret = message ("%s; %s",
- exprNode_unparse (exprData_getPairA (data)),
- exprNode_unparse (exprData_getPairB (data)));
+ if (exprNode_isStatement (exprData_getPairA (data)))
+ {
+ /*
+ ** statement expressions already print the ;
+ */
+
+ ret = message ("%s %s",
+ exprNode_unparse (exprData_getPairA (data)),
+ exprNode_unparse (exprData_getPairB (data)));
+ }
+ else
+ {
+ ret = message ("%s; %s",
+ exprNode_unparse (exprData_getPairA (data)),
+ exprNode_unparse (exprData_getPairB (data)));
+ }
break;
case XPR_FTDEFAULT:
break;
case XPR_STRINGLITERAL:
- ret = message ("\"%s\"", exprData_getLiteral (data));
+ if (ctype_isWideString (e->typ))
+ {
+ ret = message ("L\"%s\"", exprData_getLiteral (data));
+ }
+ else
+ {
+ ret = message ("\"%s\"", exprData_getLiteral (data));
+ }
break;
case XPR_NUMLIT:
}
else if (ctype_isArrayPtr (expected))
{
- return (val == 0);
+ /*
+ ** evans 2001-10-14: We allow 0 to match any pointer, but only if the type matches or is void *.
+ */
+
+ if (val == 0)
+ {
+ if (ctype_match (exprNode_getType (e), expected)
+ || ctype_isVoidPointer (exprNode_getType (e)))
+ {
+ return TRUE;
+ }
+ }
+ else
+ {
+ return FALSE;
+ }
}
else if (ctype_isAnyFloat (expected))
{
return TRUE;
}
+ DPRINTF (("Matching literal! %s %s %s %s",
+ ctype_unparse (t1), exprNode_unparse (e2),
+ ctype_unparse (t2), exprNode_unparse (e1)));
+
return (exprNode_matchLiteral (t1, e2) || exprNode_matchLiteral (t2, e1));
}
while (sRef_isValid (s) && sRef_isKnown (s))
{
- ynm readable = sRef_isReadable (s);
+ ynm readable = sRef_isValidLvalue (s);
DPRINTF (("Readable: %s / %s",
sRef_unparseFull (s), ynm_unparse (readable)));
{
lastRef = errorRef;
errorRef = s;
+ DPRINTF (("Setting ERROR: %s", sRef_unparseFull (s)));
deadRef = sRef_isPossiblyDead (errorRef);
unuseable = sRef_isUnuseable (errorRef);
errorMaybe = TRUE;
if (!sRef_isPartial (s))
{
+ DPRINTF (("Defining! %s", sRef_unparseFull (s)));
sRef_setDefined (s, fileloc_undefined);
}
}
sRef_unparseOpt (errorRef),
cstring_makeLiteral (errorMaybe ? "may be " : "")),
loc);
+
+ DPRINTF (("Error: %s", sRef_unparseFull (errorRef)));
}
sRef_setDefined (errorRef, loc);
}
if (sRef_isMeaningful (s))
- {
-
+ {
if (sRef_isDead (s))
{
sRef base = sRef_getBaseSafe (s);
}
}
- checkPassTransfer (current, ucurrent, isSpec, fcn, argno, totargs);
+ transferChecks_passParam (current, ucurrent, isSpec, fcn, argno, totargs);
exprNode_mergeUSs (fcn, current);
}
}
if ((ctype_isRealInt (tr1) || ctype_isReal (tr1)) &&
(ctype_isRealInt (tr2) || ctype_isReal (tr2)))
{
- ;
+ DPRINTF (("No error: [%s] %s / [%s] %s",
+ exprNode_unparse (e1), ctype_unparse (tr1),
+ exprNode_unparse (e2), ctype_unparse (tr2)));
}
else
{
sRef s2b)
{
if (!(sRef_isOnly (ysr) || sRef_isKeep (ysr)
- || sRef_isOwned (ysr) || sRef_isExposed (ysr)))
+ || sRef_isOwned (ysr)
+ || sRef_isExposed (ysr)))
{
- if (sRef_isAnyParam (base) && !sRef_isExposed (base))
+ if (sRef_isAnyParam (base) && !sRef_isExposed (base)
+ && !sRef_isObserver (base)) /* evans 2001-07-11: added isObserver */
+
{
if (sRef_isIReference (ysr))
{
static void
doAssign (/*@notnull@*/ exprNode e1, /*@notnull@*/ exprNode e2, bool isInit)
{
+ DPRINTF (("Do assign: %s <- %s",
+ exprNode_unparse (e1), exprNode_unparse (e2)));
+ DPRINTF (("Ctype: %s", ctype_unparse (exprNode_getType (e1))));
+
if (ctype_isRealFunction (exprNode_getType (e1))
&& !ctype_isRealPointer (exprNode_getType (e1)))
{
{
DPRINTF (("Check init: %s / %s",
exprNode_unparse (e1), exprNode_unparse (e2)));
- checkInitTransfer (e1, e2);
+ transferChecks_initialization (e1, e2);
}
else
{
- checkAssignTransfer (e1, e2);
+ transferChecks_assign (e1, e2);
}
}
else
}
}
+ if (exprNode_isStringLiteral (e2))
+ {
+ exprNode_checkStringLiteralLength (exprNode_getType (e1), e2);
+ }
+
if (isInit && sRef_isFileOrGlobalScope (e1->sref))
{
;
}
else
{
+ /*@!! BADBRANCH;*/
value = 0;
}
lltok t = exprData_getUopTok (e->edata);
return fileloc_copy(lltok_getLoc (t));
} else {
- //drl possible problem : warning fix
- // llcontbug (message ("Cannot get next sequence point: %s", exprNode_unparse (e)));
+ /* drl possible problem : warning fix
+ llcontbug (message ("Cannot get next sequence point: %s", exprNode_unparse (e)));
+ */
return fileloc_undefined;
}
}
return ret;
}
+
+bool exprNode_isInitBlock (exprNode e)
+{
+ return (exprNode_isDefined(e) && e->kind == XPR_INITBLOCK);
+}
andersk / splint.git / blobdiff