Option -val-signed-overflow-alarms misses some overflow
ID0000893: This issue was created automatically from Mantis Issue 893. Further discussion may take place here.
| Id | Project | Category | View | Due Date | Updated |
|---|---|---|---|---|---|
| ID0000893 | Frama-C | Plug-in > Eva | public | 2011-07-26 | 2011-07-26 |
| Reporter | yakobowski | Assigned To | pascal | Resolution | no change required |
| Priority | normal | Severity | minor | Reproducibility | always |
| Platform | - | OS | - | OS Version | - |
| Product Version | Frama-C Carbon-20110201 | Target Version | - | Fixed in Version | - |
Description :
The value analysis does not emit an alarm on c++, even with option -val-signed-overflow-alarms. This is because c+1 is done on an int, which is cast back into unsigned char afterwards.
void main () { signed char c=0; while(1) c++; }