Examples with FrameInstance com.oracle.truffle.api.frame.FrameInstance used on opensource projects

Example 6 with FrameInstance

use of com.oracle.truffle.api.frame.FrameInstance in project graal by oracle.

the class StackTraceTest method testStackTraversal.

@Test
public void testStackTraversal() {
    CallTarget callTarget = createCallTarget(new TestCallWithCallTargetNode(null));
    CallTarget indirect = createCallTarget(new TestCallWithIndirectTargetNode(callTarget));
    CallTarget direct = createCallTarget(new TestCallWithDirectTargetNode(indirect));
    CallTarget test = createCallTarget(new TestCallNode(null) {

        int visitCount = 0;

        @Override
        Object execute(VirtualFrame frame) {
            Object result = Truffle.getRuntime().iterateFrames(new FrameInstanceVisitor<Object>() {

                public Object visitFrame(FrameInstance frameInstance) {
                    visitCount++;
                    return "foobar";
                }
            });
            Assert.assertEquals(1, visitCount);
            Assert.assertEquals("foobar", result);
            visitCount = 0;
            result = Truffle.getRuntime().iterateFrames(new FrameInstanceVisitor<Object>() {

                public Object visitFrame(FrameInstance frameInstance) {
                    visitCount++;
                    if (visitCount == 2) {
                        return "foobar";
                    } else {
                        // continue traversing
                        return null;
                    }
                }
            });
            Assert.assertEquals(2, visitCount);
            Assert.assertEquals("foobar", result);
            return null;
        }
    });
    findTestCallNode(callTarget).setNext(test);
    direct.call();
}