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Merge remote-tracking branch 'origin/topic/timw/2131-no-redef-segfault'

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* origin/topic/timw/2131-no-redef-segfault:
  Return an error if redef'ing a variable without redef attribute
This commit is contained in:
Tim Wojtulewicz 2022-07-25 09:43:44 -07:00
commit ac4b7f9f02
6 changed files with 44 additions and 1 deletions
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4
CHANGES
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@ -1,3 +1,7 @@
5.1.0-dev.292 | 2022-07-25 09:43:44 -0700
* Return an error if redef'ing a variable without redef attribute (Tim Wojtulewicz, Corelight)
5.1.0-dev.289 | 2022-07-21 11:54:12 -0700
* Add comments for specialized versions of util::split (Tim Wojtulewicz, Corelight)

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VERSION
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@ -1 +1 @@
5.1.0-dev.289
5.1.0-dev.292

6
src/Var.cc
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@ -223,6 +223,12 @@ static void make_var(const IDPtr& id, TypePtr t, InitClass c, ExprPtr init,
id->Warn("redefinition requires \"redef\"", redef_obj, true);
}
else if ( dt == VAR_REDEF && ! id->IsRedefinable() )
{
id->Error("cannot redefine a variable not marked with &redef", init.get());
return;
}
else if ( dt != VAR_REDEF || init || ! attr )
{
if ( IsFunc(id->GetType()->Tag()) )

2
testing/btest/Baseline/language.redef-global-function/.stderr Normal file
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@ -0,0 +1,2 @@
### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
error in <...>/redef-global-function.zeek, line 22 and <command line>, line 1: cannot redefine a variable not marked with &redef (funca)

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testing/btest/Baseline/language.redef-global-function/out Normal file
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@ -0,0 +1,2 @@
### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
func2()

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testing/btest/language/redef-global-function.zeek Normal file
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@ -0,0 +1,29 @@
# @TEST-EXEC: zeek -b %INPUT -e "redef funcb = func2;" > out
# @TEST-EXEC-FAIL: zeek -b %INPUT -e "redef funca = func2;" >> out
# @TEST-EXEC: TEST_DIFF_CANONIFIER=$SCRIPTS/diff-remove-abspath btest-diff out
# @TEST-EXEC: TEST_DIFF_CANONIFIER=$SCRIPTS/diff-remove-abspath btest-diff .stderr
export {
global func1: function();
global func2: function();
}
function func1()
{
print "func1()";
}
function func2()
{
print "func2()";
}
export {
global funca = func1;
global funcb = func1 &redef;
}
event zeek_init()
{
funcb();
}