LANG.STRUCT.EXCP.MTON : Missing throw in operator new

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CodeSonar^® 9.2p0

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C and C++

LANG.STRUCT.EXCP.MTON : Missing throw in operator new

Summary

A user-defined operator new() is non-throwing, but does not include the noexcept specifier.

Properties

Class Name

Missing throw in operator new

Significance

reliability

Mnemonic

LANG.STRUCT.EXCP.MTON

Categories

AUTOSARC++14	AUTOSARC++14:A15-4-4	A declaration of non-throwing function shall contain noexcept specification.
	AUTOSARC++14:A18-5-9	Custom implementations of dynamic memory allocation and deallocation functions shall meet the semantic requirements specified in the corresponding "Required behaviour" clause from the C++ Standard.
CERT-CPP	CERT-CPP:MEM55-CPP	Honor replacement dynamic storage management requirements

Availability

Available for C++ only (not C).

Enabling

Checks for this warning class are disabled by default, and require the unnormalized C ASTs for the project. To enable them, add the following WARNING_FILTER rule and RETAIN_UNNORMALIZED_C_AST specification to the project configuration file.

RETAIN_UNNORMALIZED_C_AST = Yes
WARNING_FILTER += allow class="Missing throw in operator new"

Note that retaining the unnormalized ASTs will increase the disk space used to store the project representation, and may make the analysis take longer.

Example

#include <new>

extern void * my_alloc(std::size_t s);                     // May return std::nullptr

void * operator new(std::size_t count) { // 'Missing throw in operator new' warning issued here
    return my_alloc(count);
}

Relevant Configuration File Parameters

The following configuration file parameters affect checks for this warning class.

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