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A value-returning function must return a value from all code paths; otherwise, it will result in undefined behavior. This includes returning through less-common code paths, such as from a function-try-block, as explained in the C++ Standard, [except.handle], paragraph 15:
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Failing to return a value from a code path in a value-returning function results in undefined behavior that might be exploited to cause data integrity violations.
Rule | Severity | Likelihood | Detectable | RepairableRemediation Cost | Priority | Level |
|---|---|---|---|---|---|---|
MSC52-CPP | Medium | Probable | Yes | MediumNo | P8 | L2 |
Automated Detection
Tool | Version | Checker | Description | |||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Astrée |
| return-implicit | Fully checked | |||||||||||||||||||||||
| Axivion Bauhaus Suite |
| CertC++-MSC52 | ||||||||||||||||||||||||
| Clang |
| -Wreturn-type | Does not catch all instances of this rule, such as function-try-blocks | |||||||||||||||||||||||
| CodeSonar |
| LANG.STRUCT.MRS | Missing return statement Non-void noreturn, | |||||||||||||||||||||||
| Helix QAC |
| DF2888 | ||||||||||||||||||||||||
| Klocwork |
| FUNCRET.GEN FUNCRET.IMPLICIT | ||||||||||||||||||||||||
| LDRA tool suite |
| 2 D, 36 S | Fully implemented | |||||||||||||||||||||||
| Parasoft C/C++test |
| CERT_CPP-MSC52-a | All exit paths from a function, except main(), with non-void return type shall have an explicit return statement with an expression | |||||||||||||||||||||||
| Polyspace Bug Finder |
| CERT C++: MSC52-CPP | Checks for missing return statements (rule partially covered) | SonarQube C/C++ Plugin|||||||||||||||||||||||
| PVS-Studio |
| SonarQube C/C++ Plugin
| SonarQube C/C++ Plugin
| S935 | PRQA QA-C++V591 | |||||||||||||||||||||
| RuleChecker |
| PRQA QA-C++
| PRQA QA-C++
| 1510 | PVS-Studioreturn-implicit | Fully checked | ||||||||||||||||||||
| Security Reviewer - Static Reviewer |
| PVS
| Studio
| PVS
| Studio
| V591 | RuleChecker | |||||||||||||||||||
| Include Page | RuleChecker_V | RuleChecker_V | return-implicitRTOS_09 RTOS_10 RTOS_11 RTOS_12 | Fully implemented | ||||||||||||||||||||||
| SonarQube C/C++ Plugin |
| S935 |
Related Vulnerabilities
Search for vulnerabilities resulting from the violation of this rule on the CERT website.
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