"volatile" ignored
ID0001076: This issue was created automatically from Mantis Issue 1076. Further discussion may take place here.
| Id | Project | Category | View | Due Date | Updated |
|---|---|---|---|---|---|
| ID0001076 | Frama-C | Plug-in > Eva | public | 2012-01-30 | 2012-09-19 |
| Reporter | Jochen | Assigned To | pascal | Resolution | fixed |
| Priority | normal | Severity | minor | Reproducibility | always |
| Platform | - | OS | - | OS Version | - |
| Product Version | Frama-C Nitrogen-20111001 | Target Version | - | Fixed in Version | Frama-C Oxygen-20120901 |
Description :
Running "frama-c -val exm22.c" on the attached program produces the output "a in {0}". Running the same command after deleting the initialization of "a" in line 2 reports a run-time error (uninitialized variable access) in line 3. Both would be ok if "a" wasn't declared "volatile".
In contrast to the 1st analysis result, the value-analysis manual says on p.43: "the analyzer does not assume that the value read from a volatile variable is identical to the last value written there."