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GetExceptionCode info Overview Group

The GetExceptionCode function retrieves a code that identifies the type of exception that occurred. The function can be called only from within the filter expression or exception-handler block of a try-except exception handler.

DWORD GetExceptionCode(VOID)

Parameters

This function has no parameters.

Return Values

The return value identifies the type of exception. Following are the exception codes likely to occur due to common programming errors:

Value	Meaning
EXCEPTION_ACCESS_VIOLATION
	The thread attempted to read from or write to a virtual address for which it does not have the appropriate access.
EXCEPTION_BREAKPOINT
	A breakpoint was encountered.
EXCEPTION_DATATYPE_MISALIGNMENT
	The thread attempted to read or write data that is misaligned on hardware that does not provide alignment. For example, 16-bit values must be aligned on 2-byte boundaries, 32-bit values on 4-byte boundaries, and so on.
EXCEPTION_SINGLE_STEP
	A trace trap or other single-instruction mechanism signaled that one instruction has been executed.
EXCEPTION_ARRAY_BOUNDS_EXCEEDED
	The thread attempted to access an array element that is out of bounds, and the underlying hardware supports bounds checking.
EXCEPTION_FLT_DENORMAL_OPERAND
	One of the operands in a floating-point operation is denormal. A denormal value is one that is too small to represent as a standard floating-point value.
EXCEPTION_FLT_DIVIDE_BY_ZERO
	The thread attempted to divide a floating-point value by a floating-point divisor of zero.
EXCEPTION_FLT_INEXACT_RESULT
	The result of a floating-point operation cannot be represented exactly as a decimal fraction.
EXCEPTION_FLT_INVALID_OPERATION
	This exception represents any floating-point exception not included in this list.
EXCEPTION_FLT_OVERFLOW
	The exponent of a floating-point operation is greater than the magnitude allowed by the corresponding type.
EXCEPTION_FLT_STACK_CHECK
	The stack overflowed or underflowed as the result of a floating-point operation.
EXCEPTION_FLT_UNDERFLOW
	The exponent of a floating-point operation is less than the magnitude allowed by the corresponding type.
EXCEPTION_INT_DIVIDE_BY_ZERO
	The thread attempted to divide an integer value by an integer divisor of zero.
EXCEPTION_INT_OVERFLOW
	The result of an integer operation caused a carry out of the most significant bit of the result.
EXCEPTION_PRIV_INSTRUCTION
	The thread attempted to execute an instruction whose operation is not allowed in the current machine mode.
EXCEPTION_NONCONTINUABLE_EXCEPTION
	The thread attempted to continue execution after a noncontinuable exception occurred.

Remarks

The GetExceptionCode function can be called only from within the filter expression or exception-handler block of a try-except statement. The filter expression is evaluated if an exception occurs during execution of the try block, and it determines whether the except block is executed. The following example shows the structure of a try-except statement.

try { 

 

    /* try block */ 

 

} 

except (filter-expression) { 

 

    /* exception handler block */ 

 

}

The filter expression can invoke a filter function. The filter function cannot call GetExceptionCode. However, the return value of GetExceptionCode can be passed as a parameter to a filter function. The return value of the GetExceptionInformation function can also be passed as a parameter to a filter function. GetExceptionInformation returns a pointer to a structure that includes the exception-code information.

In the case of nested try-except statements, each statement’s filter expression is evaluated until one is evaluated as EXCEPTION_EXECUTE_HANDLER or EXCEPTION_CONTINUE_EXECUTION. Each filter expression can invoke GetExceptionCode to get the exception code.

The exception code returned is the code generated by a hardware exception, or the code specified in the RaiseException function for a software-generated exception.

GetExceptionCode info Overview Group

Parameters

Return Values

Remarks

See Also

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