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CheckBufferOverrun: Refactoring and made the checking smarter

This commit is contained in:
Daniel Marjamäki 2008-05-10 13:48:15 +00:00
parent aef0278e43
commit ece441d952
1 changed files with 64 additions and 59 deletions
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123
CheckBufferOverrun.cpp
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@ -336,70 +336,75 @@ static void CheckBufferOverrun_StructVariable()
if ( tok2->str[0] == '}' )
break;
if ( strchr( ";{,(", tok2->str[0] ) )
if ( ! strchr( ";{,(", tok2->str[0] ) )
continue;
int ivar = 0;
if ( Match(tok2->next, "%type% %var% [ %num% ] ;") )
ivar = 2;
else if ( Match(tok2->next, "%type% %type% %var% [ %num% ] ;") )
ivar = 3;
else if ( Match(tok2->next, "%type% * %var% [ %num% ] ;") )
ivar = 3;
else if ( Match(tok2->next, "%type% %type% * %var% [ %num% ] ;") )
ivar = 4;
else
continue;
const char *varname[3] = {0,0,0};
varname[1] = getstr(tok2, ivar);
int arrsize = atoi(getstr(tok2, ivar+2));
int total_size = arrsize * SizeOfType(tok2->next->str);
if (total_size == 0)
continue;
for ( const TOKEN *tok3 = tokens; tok3; tok3 = tok3->next )
{
// Declare array..
if ( Match(tok2->next, "%type% %var% [ %num% ] ;") ||
Match(tok2->next, "%type% * %var% [ %num% ] ;") )
if ( strcmp(tok3->str, structname) )
continue;
// Declare variable: Fred fred1;
if ( Match( tok3->next, "%var% ;" ) )
varname[0] = getstr(tok3, 1);
// Declare pointer: Fred *fred1
else if ( Match(tok3->next, "* %var% [,);=]") )
varname[0] = getstr(tok3, 2);
else
continue;
// Goto end of statement.
const TOKEN *CheckTok = NULL;
while ( tok3 )
{
const char *varname[3] = {0,0,0};
int ivar = IsName(getstr(tok2, 2)) ? 2 : 3;
varname[1] = getstr(tok2, ivar);
int arrsize = atoi(getstr(tok2, ivar+2));
int total_size = arrsize * SizeOfType(tok2->next->str);
if (total_size == 0)
continue;
for ( const TOKEN *tok3 = tokens; tok3; tok3 = tok3->next )
// End of statement.
if ( tok3->str[0] == ';' )
{
if ( strcmp(tok3->str, structname) )
continue;
// Declare variable: Fred fred1;
if ( Match( tok3->next, "%var% ;" ) )
varname[0] = getstr(tok3, 1);
// Declare pointer: Fred *fred1
else if ( Match(tok3->next, "* %var% [,);=]") )
varname[0] = getstr(tok3, 2);
else
continue;
// Goto end of statement.
const TOKEN *CheckTok = NULL;
while ( tok3 )
{
// End of statement.
if ( tok3->str[0] == ';' )
{
CheckTok = tok3;
break;
}
// End of function declaration..
if ( Match(tok3, ") ;") )
break;
// Function implementation..
if ( Match(tok3, ") {") )
{
CheckTok = gettok(tok3, 2);
break;
}
tok3 = tok3->next;
}
if ( ! CheckTok )
continue;
// Check variable usage..
CheckBufferOverrun_CheckScope( CheckTok, varname, arrsize, total_size );
CheckTok = tok3;
break;
}
// End of function declaration..
if ( Match(tok3, ") ;") )
break;
// Function implementation..
if ( Match(tok3, ") {") )
{
CheckTok = gettok(tok3, 2);
break;
}
tok3 = tok3->next;
}
if ( ! CheckTok )
continue;
// Check variable usage..
CheckBufferOverrun_CheckScope( CheckTok, varname, arrsize, total_size );
}
}
}