The following test excludes a Java method from compilation with a compiler directive first. It clears the directive stack second. It expects to be able to compile the method.
```
/**
 * @test ClearDirectivesTest
 * @requires vm.compiler1.enabled & vm.compiler2.enabled
 * @library /test/lib /
 * @modules java.base/jdk.internal.misc
 *
 * @build jdk.test.whitebox.WhiteBox
 * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
 *
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
 * -Xlog:codecache=trace
 * serviceability.dcmd.compiler.ClearDirectivesTest
 */

package serviceability.dcmd.compiler;

import jdk.test.lib.dcmd.JMXExecutor;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.whitebox.WhiteBox;

import java.lang.reflect.Method;

import static jdk.test.lib.Asserts.assertEQ;

import static compiler.whitebox.CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION;
import static compiler.whitebox.CompilerWhiteBoxTest.COMP_LEVEL_NONE;

public class ClearDirectivesTest {

    static int calc(int v) {
        int result = 0;
        for (int i = 0; i < v; ++i) {
          result += result * v + i;
        }
        return result;
    }

    public static void main(String[] args) throws Exception {
        Method method = ClearDirectivesTest.class.getDeclaredMethod("calc", int.class);
        String dirs = """
        [{
           match: "*::calc",
           c2: {Exclude: true}
        }]""";
        WhiteBox wb = WhiteBox.getWhiteBox();
        wb.addCompilerDirective(dirs);
        new JMXExecutor().execute("Compiler.directives_print");
        wb.enqueueMethodForCompilation(method, COMP_LEVEL_FULL_OPTIMIZATION);
        while (wb.isMethodQueuedForCompilation(method)) {
            Thread.onSpinWait();
        }
        assertEQ(COMP_LEVEL_NONE, wb.getMethodCompilationLevel(method), "Compilation level");
        new JMXExecutor().execute("Compiler.directives_clear");
        new JMXExecutor().execute("Compiler.directives_print");
        wb.enqueueMethodForCompilation(method, COMP_LEVEL_FULL_OPTIMIZATION);
        while (wb.isMethodQueuedForCompilation(method)) {
            Thread.onSpinWait();
        }
        assertEQ(COMP_LEVEL_FULL_OPTIMIZATION, wb.getMethodCompilationLevel(method), "Compilation level");
    }
}
```

The test failed:
```
STDOUT:
1 compiler directives added
Running DCMD 'Compiler.directives_print' through 'JMXExecutor'
---------------- stdout ----------------

Directive:
 matching: *.calc
 c1 directives:
  inline: -
  Enable:false Exclude:false BreakAtExecute:false BreakAtCompile:false Log:false MemLimit:0 MemStat:0 PrintAssembly:false PrintCompilation:false PrintInlining:false PrintNMethods:false BackgroundCompilation:true ReplayInline:false DumpRep
lay:false DumpInline:false CompilerDirectivesIgnoreCompileCommands:false RepeatCompilation:0 DisableIntrinsic: ControlIntrinsic: BlockLayoutByFrequency:true PrintOptoAssembly:false PrintIntrinsics:false TraceOptoPipelining:false TraceOpto
Output:false TraceEscapeAnalysis:false PrintIdeal:false TraceSpilling:false Vectorize:false CloneMapDebug:false IGVPrintLevel:0 IncrementalInlineForceCleanup:false MaxNodeLimit:80000 TraceAutoVectorization: PrintIdealPhase:

 c2 directives:
  inline: -
  Enable:true Exclude:true BreakAtExecute:false BreakAtCompile:false Log:false MemLimit:0 MemStat:0 PrintAssembly:false PrintCompilation:false PrintInlining:false PrintNMethods:false BackgroundCompilation:true ReplayInline:false DumpRepla
y:false DumpInline:false CompilerDirectivesIgnoreCompileCommands:false RepeatCompilation:0 DisableIntrinsic: ControlIntrinsic: BlockLayoutByFrequency:true PrintOptoAssembly:false PrintIntrinsics:false TraceOptoPipelining:false TraceOptoOu
tput:false TraceEscapeAnalysis:false PrintIdeal:false TraceSpilling:false Vectorize:false CloneMapDebug:false IGVPrintLevel:0 IncrementalInlineForceCleanup:false MaxNodeLimit:80000 TraceAutoVectorization: PrintIdealPhase:


Directive: (default)
 matching: *.*
 c1 directives:
  inline: -
  Enable:true Exclude:false BreakAtExecute:false BreakAtCompile:false Log:false MemLimit:0 MemStat:0 PrintAssembly:false PrintCompilation:false PrintInlining:false PrintNMethods:false BackgroundCompilation:true ReplayInline:false DumpRepl
ay:false DumpInline:false CompilerDirectivesIgnoreCompileCommands:false RepeatCompilation:0 DisableIntrinsic: ControlIntrinsic: BlockLayoutByFrequency:true PrintOptoAssembly:false PrintIntrinsics:false TraceOptoPipelining:false TraceOptoO
utput:false TraceEscapeAnalysis:false PrintIdeal:false TraceSpilling:false Vectorize:false CloneMapDebug:false IGVPrintLevel:0 IncrementalInlineForceCleanup:false MaxNodeLimit:80000 TraceAutoVectorization: PrintIdealPhase:

 c2 directives:
  inline: -
  Enable:true Exclude:false BreakAtExecute:false BreakAtCompile:false Log:false MemLimit:0 MemStat:0 PrintAssembly:false PrintCompilation:false PrintInlining:false PrintNMethods:false BackgroundCompilation:true ReplayInline:false DumpRepl
ay:false DumpInline:false CompilerDirectivesIgnoreCompileCommands:false RepeatCompilation:0 DisableIntrinsic: ControlIntrinsic: BlockLayoutByFrequency:true PrintOptoAssembly:false PrintIntrinsics:false TraceOptoPipelining:false TraceOptoO
utput:false TraceEscapeAnalysis:false PrintIdeal:false TraceSpilling:false Vectorize:false CloneMapDebug:false IGVPrintLevel:0 IncrementalInlineForceCleanup:false MaxNodeLimit:80000 TraceAutoVectorization: PrintIdealPhase:


---------------- stderr ----------------

----------------------------------------

WB error: failed to compile at level 4 method serviceability.dcmd.compiler.ClearDirectivesTest::calc
Running DCMD 'Compiler.directives_clear' through 'JMXExecutor'
---------------- stdout ----------------

---------------- stderr ----------------

----------------------------------------

Running DCMD 'Compiler.directives_print' through 'JMXExecutor'
---------------- stdout ----------------

Directive: (default)
 matching: *.*
 c1 directives:
  inline: -
  Enable:true Exclude:false BreakAtExecute:false BreakAtCompile:false Log:false MemLimit:0 MemStat:0 PrintAssembly:false PrintCompilation:false PrintInlining:false PrintNMethods:false BackgroundCompilation:true ReplayInline:false DumpRepl
ay:false DumpInline:false CompilerDirectivesIgnoreCompileCommands:false RepeatCompilation:0 DisableIntrinsic: ControlIntrinsic: BlockLayoutByFrequency:true PrintOptoAssembly:false PrintIntrinsics:false TraceOptoPipelining:false TraceOptoO
utput:false TraceEscapeAnalysis:false PrintIdeal:false TraceSpilling:false Vectorize:false CloneMapDebug:false IGVPrintLevel:0 IncrementalInlineForceCleanup:false MaxNodeLimit:80000 TraceAutoVectorization: PrintIdealPhase:

 c2 directives:
  inline: -
  Enable:true Exclude:false BreakAtExecute:false BreakAtCompile:false Log:false MemLimit:0 MemStat:0 PrintAssembly:false PrintCompilation:false PrintInlining:false PrintNMethods:false BackgroundCompilation:true ReplayInline:false DumpRepl
ay:false DumpInline:false CompilerDirectivesIgnoreCompileCommands:false RepeatCompilation:0 DisableIntrinsic: ControlIntrinsic: BlockLayoutByFrequency:true PrintOptoAssembly:false PrintIntrinsics:false TraceOptoPipelining:false TraceOptoO
utput:false TraceEscapeAnalysis:false PrintIdeal:false TraceSpilling:false Vectorize:false CloneMapDebug:false IGVPrintLevel:0 IncrementalInlineForceCleanup:false MaxNodeLimit:80000 TraceAutoVectorization: PrintIdealPhase:


---------------- stderr ----------------

----------------------------------------

WB error: failed to compile at level 4 method serviceability.dcmd.compiler.ClearDirectivesTest::calc
[4.725s][debug][codecache] failed to find oopmap for cb: 0x00007f982c23fc08 offset: 531
STDERR:
java.lang.RuntimeException: Compilation level expected: 4 but was: 0
        at jdk.test.lib.Asserts.fail(Asserts.java:691)
        at jdk.test.lib.Asserts.assertEquals(Asserts.java:204)
        at jdk.test.lib.Asserts.assertEQ(Asserts.java:180)
        at serviceability.dcmd.compiler.ClearDirectivesTest.main(ClearDirectivesTest.java:59)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
        at java.base/java.lang.reflect.Method.invoke(Method.java:580)
        at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
        at java.base/java.lang.Thread.run(Thread.java:1575)
```