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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| Yes
| Import Library
| -
| Header File
| -
| Unicode
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| Platform Notes
| None
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GetExceptionCode
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:
EXCEPTION_ACCESS_VIOLATION
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| The thread attempted to read from or write to a virtual address for which it
does not have the appropriate access.
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| A breakpoint was encountered.
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EXCEPTION_DATATYPE_MISALIGNMENT
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| 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.
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| A trace trap or other single-instruction mechanism signaled that one
instruction has been executed.
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EXCEPTION_ARRAY_BOUNDS_EXCEEDED
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| The thread attempted to access an array element that is out of bounds, and the
underlying hardware supports bounds checking.
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EXCEPTION_FLT_DENORMAL_OPERAND
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| 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.
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EXCEPTION_FLT_DIVIDE_BY_ZERO
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| The thread attempted to divide a floating-point value by a floating-point
divisor of zero.
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EXCEPTION_FLT_INEXACT_RESULT
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| The result of a floating-point operation cannot be represented exactly as a
decimal fraction.
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EXCEPTION_FLT_INVALID_OPERATION
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| This exception represents any floating-point exception not included in this
list.
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| The exponent of a floating-point operation is greater than the magnitude
allowed by the corresponding type.
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EXCEPTION_FLT_STACK_CHECK
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| The stack overflowed or underflowed as the result of a floating-point
operation.
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| The exponent of a floating-point operation is less than the magnitude allowed
by the corresponding type.
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EXCEPTION_INT_DIVIDE_BY_ZERO
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| The thread attempted to divide an integer value by an integer divisor of zero.
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| The result of an integer operation caused a carry out of the most significant
bit of the result.
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EXCEPTION_PRIV_INSTRUCTION
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| The thread attempted to execute an instruction whose operation is not allowed
in the current machine mode.
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EXCEPTION_NONCONTINUABLE_EXCEPTION
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| The thread attempted to continue execution after a noncontinuable exception
occurred.
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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.
See Also
GetExceptionInformation, RaiseException
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