Class VMStackWalker

public static ClassLoader firstNonNullClassLoader()

Walk up the stack and return the first non-null class loader. If there aren't any non-null class loaders on the stack, return null.

public static Class<T> getCallingClass()

Get the class associated with the method invoking the method invoking this method, or null if the stack is not that deep (e.g., invoked via JNI invocation API). This method is an optimization for the expression getClassContext()[1] and should return the same result.

When compiling to native code gcj translates calls to this method into calls to getCallingClass(addr), with addr being the address of the method calling this method. getCallingClass(addr) does not unwind the stack, so is therefore more efficient.

public static ClassLoader getCallingClassLoader()

Get the class loader associated with the Class returned by getCallingClass(), or null if no such class exists or it is the boot loader. This method is an optimization for the expression VMStackWalker.getClassLoader(getClassContext()[1]) and should return the same result.

When compiling to native code gcj translates calls to this method into calls to getCallingClassLoader(addr), with addr being the address of the method calling this method. getCallingClassLoader(addr) does not unwind the stack, so is therefore more efficient.

public static Class<T>[] getClassContext()

Get a list of all the classes currently executing methods on the Java stack. getClassContext()[0] is the class associated with the currently executing method, i.e., the method that called VMStackWalker.getClassContext() (possibly through reflection). So you may need to pop off these stack frames from the top of the stack:

• VMStackWalker.getClassContext()
• Method.invoke()

Returns:

an array of the declaring classes of each stack frame

public static ClassLoader getClassLoader(Class<T> cl)

Retrieve the class's ClassLoader, or null if loaded by the bootstrap loader. I.e., this should return the same thing as java.lang.VMClass.getClassLoader. This duplicate version is here to work around access permissions.