SEI CERT C++ Coding Standard

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Comment: Fix typo in code example; add #include <cstddef> to same example

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Code Block
bgColor#FFcccc
langcpp
#include <cstddef>
#include <new>

struct S {
  S ();
  ~S ();
};

void f() {
  const unsigned N = 32;
  alignas(S) unsigned char buffer[sizeof(S) * N];
  S *sp = ::new (buffer) S[N];
 
  // ...
  // Destroy elements of the array.
  for (size_t i = 0; i != nN; ++i) {
    sp[i].~S();
  }
}

Compliant Solution (Clang/GCC)

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Passing improperly aligned pointers or pointers to insufficient storage to placement new expressions can result in undefined behavior, including buffer overflow and abnormal termination.

Rule

Severity

Likelihood

Detectable

Remediation CostRepairable

Priority

Level

MEM54-CPP

High

Likely

No

MediumNo

P18P9

L1 L2

Automated Detection

Tool

Version

Checker

Description

Axivion Bauhaus Suite

Include Page
Axivion Bauhaus Suite_V
Axivion Bauhaus Suite_V

CertC++-MEM54
CodeSonar
Include Page
CodeSonar_V
CodeSonar_V

LANG.MEM.BO

Buffer Overrun

Helix QAC

Include Page
Helix QAC_V
Helix QAC_V

C++3119, C++3128, DF3520, DF3521, DF3522, DF3523


Klocwork
Include Page
Klocwork_V
Klocwork_V

CERT.MEM.PLACEMENTNEW.MISALIGNED
CERT.MEM.PLACEMENTNEW.TOOSMALL


LDRA tool suite
Include Page
LDRA_V
LDRA_V

597 S

Enhanced Enforcement

Parasoft C/C++test

Include Page
Parasoft_V
Parasoft_V

CERT_CPP-MEM54-a
CERT_CPP-MEM54-b

Do not pass a pointer that has insufficient storage capacity or that is not suitably aligned for the object being constructed to placement 'new'
An overhead should be used when an array of objects is passed to the placement 'new' allocation function

Polyspace Bug Finder

Include Page
Polyspace Bug Finder_V
Polyspace Bug Finder_V

CERT C++: MEM54-CPPChecks for placement new used with insufficient storage or misaligned pointers (rule fully covered)
PVS-Studio

Include Page
PVS-Studio_V
PVS-Studio_V

V752

Related Vulnerabilities

Search for vulnerabilities resulting from the violation of this rule on the CERT website.

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