Microsoft SDK for Java

IJavaEventMonitorIDInfo3::
GetMethodEntryParameters

The GetMethodEntryParameters method of the IJavaEventMonitorIDInfo3 interface can be used to retrieve the entry parameters that are passed to a method before execution of the method begins.

A profiler can only call GetMethodEntryParameters during a MethodEntry callback notification.

The GetMethodEntryParameters method is implemented only by the IJavaEventMonitorIDInfo3 interface.

Syntax

HRESULT GetMethodEntryParameters(DWORD **ppslots, DWORD **ppreserved, JVM_CALLING_CONVENTION *pcalling_convention, DWORD *pflags);

Return Value

A pointer to the base of an array of the parameters passed to the current method, a bitmask of call flags, and value that represents the calling convention for the method.

Parameters

[out] **ppslots A pointer to the base of an array of the parameters passed to the current method.
[out] **ppreserved A pointer to an array of reserved elements.
[out] *pcalling_convention The calling convention for the method.
[out] *pflags A bitmask of JVM_CALL_FLAGS.

Remarks

The calling convention for the method about to be executed can be any of the values defined in the JVM_CALLING_CONVENTION enumeration.

JVM_CALLING_CONVENTION

Constant Value Description
JVM_CALL_PASCAL 1 This method uses the Pascal calling convention where the parameters are pushed on the stack in the order that they appear in the method's prototype.
JVM_CALL_CDECL 2 This method uses the C calling convention where the parameters are pushed on the stack in the reverse order that they appear in the method's prototype.

To properly interpret method parameters, a profiler application would need to parse the signature for this method. This parameter signature can be retrieved by calling the MethodInformation method.

Only the JVM_CALL_THIS value of the JVM_CALL_FLAGS enumeration is defined for the call flags for a method.

JVM_CALL_FLAGS

Constant Value Description
JVM_CALL_THIS 1 When this call flag is set, it indicates that the method is non-static. When this flag is clear, it indicates that the method is static.

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