Skip to content

Regression tests demonstrating spurious pointer overflow check failure #5283

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Apr 1, 2020
Merged

Regression tests demonstrating spurious pointer overflow check failure #5283

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
10 changes: 10 additions & 0 deletions regression/cbmc/pointer-overflow2/main.c
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,10 @@
#include <stdlib.h>

void main()
{
char *p = (char *)10;
p -= 1;
p += 1;
p += -1; // spurious pointer overflow report
p -= -1; // spurious pointer overflow report
}
11 changes: 11 additions & 0 deletions regression/cbmc/pointer-overflow2/test.desc
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,11 @@
KNOWNBUG
main.c
--pointer-overflow-check
^EXIT=0$
^SIGNAL=0$
\[main.overflow.1\] line \d+ pointer arithmetic overflow on - in p - \(signed long int\)1: SUCCESS
\[main.overflow.2\] line \d+ pointer arithmetic overflow on \+ in p \+ \(signed long int\)1: SUCCESS
\[main.overflow.3\] line \d+ pointer arithmetic overflow on \+ in p \+ \(signed long int\)-1: SUCCESS
\[main.overflow.4\] line \d+ pointer arithmetic overflow on - in p - \(signed long int\)-1: SUCCESS
--
Comment on lines +8 to +10
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

At the moment, these two fail?

^warning: ignoring
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

⛏️ Please add description to the bottom of each test explaining what its purpose is (and in this case - linking to the issue to fix it?)