8187289: NotifyFramePop request is not cleared if JVMTI_EVENT_FRAME_POP is disabled
Reviewed-by: sspitsyn, cjplummer
--- a/src/hotspot/share/prims/jvmtiEventController.cpp Mon Jun 04 08:56:41 2018 -0700
+++ b/src/hotspot/share/prims/jvmtiEventController.cpp Mon Jun 04 10:25:44 2018 -0700
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@@ -508,14 +508,19 @@
julong was_any_env_enabled = state->thread_event_enable()->_event_enabled.get_bits();
julong any_env_enabled = 0;
+ // JVMTI_EVENT_FRAME_POP can be disabled (in the case FRAME_POP_BIT is not set),
+ // but we need to set interp_only if some JvmtiEnvThreadState has frame pop set
+ // to clear the request
+ bool has_frame_pops = false;
{
- // This iteration will include JvmtiEnvThreadStates whoses environments
+ // This iteration will include JvmtiEnvThreadStates whose environments
// have been disposed. These JvmtiEnvThreadStates must not be filtered
// as recompute must be called on them to disable their events,
JvmtiEnvThreadStateIterator it(state);
for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
any_env_enabled |= recompute_env_thread_enabled(ets, state);
+ has_frame_pops |= ets->has_frame_pops();
}
}
@@ -523,23 +528,23 @@
// mark if event is truly enabled on this thread in any environment
state->thread_event_enable()->_event_enabled.set_bits(any_env_enabled);
- // compute interp_only mode
- bool should_be_interp = (any_env_enabled & INTERP_EVENT_BITS) != 0;
- bool is_now_interp = state->is_interp_only_mode();
-
- if (should_be_interp != is_now_interp) {
- if (should_be_interp) {
- enter_interp_only_mode(state);
- } else {
- leave_interp_only_mode(state);
- }
- }
-
// update the JavaThread cached value for thread-specific should_post_on_exceptions value
bool should_post_on_exceptions = (any_env_enabled & SHOULD_POST_ON_EXCEPTIONS_BITS) != 0;
state->set_should_post_on_exceptions(should_post_on_exceptions);
}
+ // compute interp_only mode
+ bool should_be_interp = (any_env_enabled & INTERP_EVENT_BITS) != 0 || has_frame_pops;
+ bool is_now_interp = state->is_interp_only_mode();
+
+ if (should_be_interp != is_now_interp) {
+ if (should_be_interp) {
+ enter_interp_only_mode(state);
+ } else {
+ leave_interp_only_mode(state);
+ }
+ }
+
return any_env_enabled;
}
--- a/src/hotspot/share/prims/jvmtiExport.cpp Mon Jun 04 08:56:41 2018 -0700
+++ b/src/hotspot/share/prims/jvmtiExport.cpp Mon Jun 04 10:25:44 2018 -0700
@@ -1576,9 +1576,9 @@
}
}
- if (state->is_enabled(JVMTI_EVENT_FRAME_POP)) {
- JvmtiEnvThreadStateIterator it(state);
- for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
+ JvmtiEnvThreadStateIterator it(state);
+ for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
+ if (ets->has_frame_pops()) {
int cur_frame_number = state->cur_stack_depth();
if (ets->is_frame_pop(cur_frame_number)) {
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/serviceability/jvmti/NotifyFramePop/NotifyFramePopTest.java Mon Jun 04 10:25:44 2018 -0700
@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * @test
+ * @summary Verifies NotifyFramePop request is cleared if JVMTI_EVENT_FRAME_POP is disabled
+ * @compile NotifyFramePopTest.java
+ * @run main/othervm/native -agentlib:NotifyFramePopTest NotifyFramePopTest
+ */
+
+public class NotifyFramePopTest {
+ static {
+ try {
+ System.loadLibrary("NotifyFramePopTest");
+ } catch (UnsatisfiedLinkError ex) {
+ System.err.println("Could not load NotifyFramePopTest library");
+ System.err.println("java.library.path:"
+ + System.getProperty("java.library.path"));
+ throw ex;
+ }
+ }
+
+ public static void main(String args[]) {
+ if (!canGenerateFramePopEvents()) {
+ log("FramePop event is not supported - skipping the test");
+ return;
+ }
+
+ // Sanity testing that FRAME_POP works.
+ test("sanity", true, () -> {
+ setFramePopNotificationMode(true);
+ notifyFramePop(null);
+ });
+
+ // Request notification and then disable FRAME_POP event notification.
+ // This should not prevent the notification for the frame being cleared
+ // when we return from the method.
+ test("requestAndDisable", false, () -> {
+ setFramePopNotificationMode(true);
+ notifyFramePop(null);
+ setFramePopNotificationMode(false);
+ });
+
+ // Ensure there is no pending event
+ test("ensureCleared", false, () -> {
+ setFramePopNotificationMode(true);
+ });
+
+ log("Test PASSED");
+ }
+
+ private native static boolean canGenerateFramePopEvents();
+ private native static void setFramePopNotificationMode(boolean enabled);
+ private native static void notifyFramePop(Thread thread);
+ private native static boolean framePopReceived();
+
+ private static void log(String msg) {
+ System.out.println(msg);
+ }
+
+ private interface Test {
+ void test();
+ }
+
+ private static void test(String name, boolean framePopExpected, Test theTest) {
+ log("test: " + name);
+ theTest.test();
+ boolean actual = framePopReceived();
+ if (framePopExpected != actual) {
+ throw new RuntimeException("unexpected notification:"
+ + " FramePop expected: " + (framePopExpected ? "yes" : "no")
+ + ", actually received: " + (actual ? "yes" : "no"));
+ }
+ log(" - OK (" + (actual ? "received" : "NOT received") + ")");
+ }
+
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/serviceability/jvmti/NotifyFramePop/libNotifyFramePopTest.c Mon Jun 04 10:25:44 2018 -0700
@@ -0,0 +1,173 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include "jvmti.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef JNI_ENV_ARG
+
+#ifdef __cplusplus
+#define JNI_ENV_ARG(x, y) y
+#define JNI_ENV_PTR(x) x
+#else
+#define JNI_ENV_ARG(x,y) x, y
+#define JNI_ENV_PTR(x) (*x)
+#endif
+
+#endif
+
+static jvmtiEnv *jvmti = NULL;
+static jvmtiCapabilities caps;
+static jvmtiEventCallbacks callbacks;
+static jboolean framePopReceived = JNI_FALSE;
+
+static jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved);
+
+JNIEXPORT
+jint JNICALL Agent_OnLoad(JavaVM *jvm, char *options, void *reserved) {
+ return Agent_Initialize(jvm, options, reserved);
+}
+
+JNIEXPORT
+jint JNICALL Agent_OnAttach(JavaVM *jvm, char *options, void *reserved) {
+ return Agent_Initialize(jvm, options, reserved);
+}
+
+JNIEXPORT
+jint JNICALL JNI_OnLoad(JavaVM *jvm, void *reserved) {
+ return JNI_VERSION_9;
+}
+
+
+static void reportError(const char *msg, int err) {
+ fprintf(stdout, "%s, error: %d\n", msg, err);
+ fflush(stdout);
+}
+
+
+static void JNICALL
+FramePop(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thread,
+ jmethodID method, jboolean wasPoppedByException)
+{
+ jvmtiError err;
+ jclass cls = NULL;
+ char* csig = NULL;
+ char* name = NULL;
+ char* sign = NULL;
+
+ framePopReceived = JNI_TRUE;
+
+ err = (*jvmti_env)->GetMethodDeclaringClass(jvmti_env, method, &cls);
+ if (err != JVMTI_ERROR_NONE) {
+ reportError("FramePop: GetMethodDeclaringClass failed", err);
+ }
+ err = (*jvmti_env)->GetClassSignature(jvmti_env, cls, &csig, NULL);
+ if (err != JVMTI_ERROR_NONE) {
+ reportError("FramePop: GetClassSignature failed", err);
+ }
+ err = (*jvmti_env)->GetMethodName(jvmti_env, method, &name, &sign, NULL);
+ if (err != JVMTI_ERROR_NONE) {
+ reportError("FramePop: GetMethodName failed", err);
+ }
+ fprintf(stdout, "FramePop event from method: %s %s%s\n", csig, name, sign);
+ fflush(stdout);
+
+ (*jvmti_env)->Deallocate(jvmti_env, (unsigned char*)csig);
+ (*jvmti_env)->Deallocate(jvmti_env, (unsigned char*)name);
+ (*jvmti_env)->Deallocate(jvmti_env, (unsigned char*)sign);
+}
+
+static
+jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
+ jint res;
+ jvmtiError err;
+
+ res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti), JVMTI_VERSION_9);
+ if (res != JNI_OK || jvmti == NULL) {
+ reportError("GetEnv(JVMTI_VERSION_9) failed", res);
+ return JNI_ERR;
+ }
+ err = (*jvmti)->GetPotentialCapabilities(jvmti, &caps);
+ if (err != JVMTI_ERROR_NONE) {
+ reportError("GetPotentialCapabilities failed", err);
+ return JNI_ERR;
+ }
+ err = (*jvmti)->AddCapabilities(jvmti, &caps);
+ if (err != JVMTI_ERROR_NONE) {
+ reportError("AddCapabilities failed",err);
+ return JNI_ERR;
+ }
+ err = (*jvmti)->GetCapabilities(jvmti, &caps);
+ if (err != JVMTI_ERROR_NONE) {
+ reportError("GetCapabilities failed", err);
+ return JNI_ERR;
+ }
+ if (caps.can_generate_frame_pop_events) {
+ callbacks.FramePop = &FramePop;
+ err = (*jvmti)->SetEventCallbacks(jvmti, &callbacks, sizeof(callbacks));
+ if (err != JVMTI_ERROR_NONE) {
+ reportError("SetEventCallbacks failed", err);
+ return JNI_ERR;
+ }
+ }
+ return JNI_OK;
+}
+
+JNIEXPORT jboolean JNICALL
+Java_NotifyFramePopTest_canGenerateFramePopEvents(JNIEnv *env, jclass cls) {
+ return caps.can_generate_frame_pop_events ? JNI_TRUE : JNI_FALSE;
+}
+
+JNIEXPORT void JNICALL
+Java_NotifyFramePopTest_setFramePopNotificationMode(JNIEnv *env, jclass cl, jboolean enable) {
+ jvmtiEventMode mode = enable ? JVMTI_ENABLE : JVMTI_DISABLE;
+ jvmtiError err = (*jvmti)->SetEventNotificationMode(jvmti, mode, JVMTI_EVENT_FRAME_POP, NULL);
+ if (err != JVMTI_ERROR_NONE) {
+ reportError("Failed to set notification mode for FRAME_POP events", err);
+ }
+}
+
+JNIEXPORT void JNICALL
+Java_NotifyFramePopTest_notifyFramePop(JNIEnv *env, jclass cls, jthread thread)
+{
+ jvmtiError err= (*jvmti)->NotifyFramePop(jvmti, thread, 1);
+ if (err != JVMTI_ERROR_NONE) {
+ reportError("NotifyFramePop failed", err);
+ }
+}
+
+JNIEXPORT jboolean JNICALL
+Java_NotifyFramePopTest_framePopReceived(JNIEnv *env, jclass cls) {
+ jboolean result = framePopReceived;
+ framePopReceived = JNI_FALSE;
+ return result;
+}
+
+#ifdef __cplusplus
+}
+#endif