8222072: JVMTI GenerateEvents() sends CompiledMethodLoad events to wrong jvmtiEnv
Summary: Fix GenerateEvents() to send CompiledMethodLoad events to requesting agent only
Reviewed-by: jcbeyler, amenkov
--- a/src/hotspot/share/prims/jvmtiCodeBlobEvents.cpp Thu Apr 11 01:21:11 2019 +0200
+++ b/src/hotspot/share/prims/jvmtiCodeBlobEvents.cpp Wed Apr 10 17:29:03 2019 -0700
@@ -236,7 +236,7 @@
// Don't hold the lock over the notify or jmethodID creation
MutexUnlockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
current->get_and_cache_jmethod_id();
- JvmtiExport::post_compiled_method_load(current);
+ JvmtiExport::post_compiled_method_load(env, current);
}
return JVMTI_ERROR_NONE;
}
--- a/src/hotspot/share/prims/jvmtiExport.cpp Thu Apr 11 01:21:11 2019 +0200
+++ b/src/hotspot/share/prims/jvmtiExport.cpp Wed Apr 10 17:29:03 2019 -0700
@@ -2170,61 +2170,37 @@
JvmtiEnvIterator it;
for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
- if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
- if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
- continue;
- }
- EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
- ("[%s] class compile method load event sent %s.%s ",
- JvmtiTrace::safe_get_thread_name(thread),
- (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(),
- (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string()));
- ResourceMark rm(thread);
- HandleMark hm(thread);
-
- // Add inlining information
- jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm);
- // Pass inlining information through the void pointer
- JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord);
- JvmtiJavaThreadEventTransition jet(thread);
- jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
- if (callback != NULL) {
- (*callback)(env->jvmti_external(), jem.jni_methodID(),
- jem.code_size(), jem.code_data(), jem.map_length(),
- jem.map(), jem.compile_info());
- }
- }
+ post_compiled_method_load(env, nm);
}
}
-
// post a COMPILED_METHOD_LOAD event for a given environment
-void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length,
- const void *code_begin, const jint map_length,
- const jvmtiAddrLocationMap* map)
-{
- if (env->phase() <= JVMTI_PHASE_PRIMORDIAL) {
+void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, nmethod *nm) {
+ if (env->phase() == JVMTI_PHASE_PRIMORDIAL || !env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
+ return;
+ }
+ jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
+ if (callback == NULL) {
return;
}
JavaThread* thread = JavaThread::current();
- EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
- ("[%s] method compile load event triggered (by GenerateEvents)",
- JvmtiTrace::safe_get_thread_name(thread)));
- if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
-
- EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
- ("[%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT,
- JvmtiTrace::safe_get_thread_name(thread), p2i(method)));
-
- JvmtiEventMark jem(thread);
- JvmtiJavaThreadEventTransition jet(thread);
- jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
- if (callback != NULL) {
- (*callback)(env->jvmti_external(), method,
- length, code_begin, map_length,
- map, NULL);
- }
- }
+
+ EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
+ ("[%s] method compile load event sent %s.%s ",
+ JvmtiTrace::safe_get_thread_name(thread),
+ (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(),
+ (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string()));
+ ResourceMark rm(thread);
+ HandleMark hm(thread);
+
+ // Add inlining information
+ jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm);
+ // Pass inlining information through the void pointer
+ JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord);
+ JvmtiJavaThreadEventTransition jet(thread);
+ (*callback)(env->jvmti_external(), jem.jni_methodID(),
+ jem.code_size(), jem.code_data(), jem.map_length(),
+ jem.map(), jem.compile_info());
}
void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) {
--- a/src/hotspot/share/prims/jvmtiExport.hpp Thu Apr 11 01:21:11 2019 +0200
+++ b/src/hotspot/share/prims/jvmtiExport.hpp Wed Apr 10 17:29:03 2019 -0700
@@ -165,9 +165,7 @@
// DynamicCodeGenerated events for a given environment.
friend class JvmtiCodeBlobEvents;
- static void post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length,
- const void *code_begin, const jint map_length,
- const jvmtiAddrLocationMap* map) NOT_JVMTI_RETURN;
+ static void post_compiled_method_load(JvmtiEnv* env, nmethod *nm) NOT_JVMTI_RETURN;
static void post_dynamic_code_generated(JvmtiEnv* env, const char *name, const void *code_begin,
const void *code_end) NOT_JVMTI_RETURN;
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/serviceability/jvmti/GenerateEvents/MyPackage/GenerateEventsTest.java Wed Apr 10 17:29:03 2019 -0700
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2019, 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
+ * @bug 8222072
+ * @summary Send CompiledMethodLoad events only to the environment requested it with GenerateEvents
+ * @compile GenerateEventsTest.java
+ * @run main/othervm/native -agentlib:GenerateEvents1 -agentlib:GenerateEvents2 MyPackage.GenerateEventsTest
+ */
+
+package MyPackage;
+
+public class GenerateEventsTest {
+ static native void agent1GenerateEvents();
+ static native void agent2SetThread(Thread thread);
+ static native boolean agent1FailStatus();
+ static native boolean agent2FailStatus();
+
+ public static void main(String[] args) {
+ agent2SetThread(Thread.currentThread());
+ agent1GenerateEvents(); // Re-generate CompiledMethodLoad events
+ if (agent1FailStatus()|| agent2FailStatus()) {
+ throw new RuntimeException("GenerateEventsTest failed!");
+ }
+ System.out.println("GenerateEventsTest passed!");
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/serviceability/jvmti/GenerateEvents/libGenerateEvents1.cpp Wed Apr 10 17:29:03 2019 -0700
@@ -0,0 +1,137 @@
+/*
+ * Copyright (c) 2019, 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 <string.h>
+#include "jvmti.h"
+
+extern "C" {
+
+#define AGENT_NAME "agent1"
+
+static JavaVM *java_vm = NULL;
+static jthread exp_thread = NULL;
+static jvmtiEnv *jvmti1 = NULL;
+static jint agent1_event_count = 0;
+static bool fail_status = false;
+
+static void
+check_jvmti_status(JNIEnv* env, jvmtiError err, const char* msg) {
+ if (err != JVMTI_ERROR_NONE) {
+ printf("check_jvmti_status: JVMTI function returned error: %d\n", err);
+ fail_status = true;
+ env->FatalError(msg);
+ }
+}
+
+static void JNICALL
+CompiledMethodLoad(jvmtiEnv* jvmti, jmethodID method,
+ jint code_size, const void* code_addr,
+ jint map_length, const jvmtiAddrLocationMap* map,
+ const void* compile_info) {
+ JNIEnv* env = NULL;
+ jthread thread = NULL;
+ char* name = NULL;
+ char* sign = NULL;
+ jvmtiError err;
+
+ // Posted on JavaThread's, so it is legal to obtain JNIEnv*
+ if (java_vm->GetEnv((void **) (&env), JNI_VERSION_9) != JNI_OK) {
+ printf("CompiledMethodLoad: failed to obtain JNIEnv*\n");
+ fail_status = true;
+ return;
+ }
+
+ jvmti->GetCurrentThread(&thread);
+ if (!env->IsSameObject(thread, exp_thread)) {
+ return; // skip events from unexpected threads
+ }
+ agent1_event_count++;
+
+ err = jvmti->GetMethodName(method, &name, &sign, NULL);
+ check_jvmti_status(env, err, "CompiledMethodLoad: Error in JVMTI GetMethodName");
+
+ printf("%s: CompiledMethodLoad: %s%s\n", AGENT_NAME, name, sign);
+ fflush(0);
+}
+
+JNIEXPORT jint JNICALL
+Agent_OnLoad(JavaVM *jvm, char *options, void *reserved) {
+ jvmtiEventCallbacks callbacks;
+ jvmtiCapabilities caps;
+ jvmtiError err;
+
+ java_vm = jvm;
+ if (jvm->GetEnv((void **) (&jvmti1), JVMTI_VERSION) != JNI_OK) {
+ printf("Agent_OnLoad: Error in GetEnv in obtaining jvmtiEnv*\n");
+ fail_status = true;
+ return JNI_ERR;
+ }
+
+ memset(&callbacks, 0, sizeof(callbacks));
+ callbacks.CompiledMethodLoad = &CompiledMethodLoad;
+
+ err = jvmti1->SetEventCallbacks(&callbacks, sizeof(jvmtiEventCallbacks));
+ if (err != JVMTI_ERROR_NONE) {
+ printf("Agent_OnLoad: Error in JVMTI SetEventCallbacks: %d\n", err);
+ fail_status = true;
+ return JNI_ERR;
+ }
+
+ memset(&caps, 0, sizeof(caps));
+ caps.can_generate_compiled_method_load_events = 1;
+
+ err = jvmti1->AddCapabilities(&caps);
+ if (err != JVMTI_ERROR_NONE) {
+ printf("Agent_OnLoad: Error in JVMTI AddCapabilities: %d\n", err);
+ fail_status = true;
+ return JNI_ERR;
+ }
+ return JNI_OK;
+}
+
+JNIEXPORT void JNICALL
+Java_MyPackage_GenerateEventsTest_agent1GenerateEvents(JNIEnv *env, jclass cls) {
+ jthread thread = NULL;
+ jvmtiError err;
+
+ err = jvmti1->GetCurrentThread(&thread);
+ check_jvmti_status(env, err, "generateEvents1: Error in JVMTI GetCurrentThread");
+
+ exp_thread = (jthread)env->NewGlobalRef(thread);
+
+ err = jvmti1->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_COMPILED_METHOD_LOAD, NULL);
+ check_jvmti_status(env, err, "generateEvents1: Error in JVMTI SetEventNotificationMode: JVMTI_ENABLE");
+
+ err = jvmti1->GenerateEvents(JVMTI_EVENT_COMPILED_METHOD_LOAD);
+ check_jvmti_status(env, err, "generateEvents1: Error in JVMTI GenerateEvents");
+
+ err = jvmti1->SetEventNotificationMode(JVMTI_DISABLE, JVMTI_EVENT_COMPILED_METHOD_LOAD, NULL);
+ check_jvmti_status(env, err, "generateEvents1: Error in JVMTI SetEventNotificationMode: JVMTI_DISABLE");
+}
+
+JNIEXPORT jboolean JNICALL
+Java_MyPackage_GenerateEventsTest_agent1FailStatus(JNIEnv *env, jclass cls) {
+ return fail_status;
+}
+
+} // extern "C"
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/serviceability/jvmti/GenerateEvents/libGenerateEvents2.cpp Wed Apr 10 17:29:03 2019 -0700
@@ -0,0 +1,140 @@
+/*
+ * Copyright (c) 2019, 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 <string.h>
+#include "jvmti.h"
+
+extern "C" {
+
+#define AGENT_NAME "agent2"
+
+static JavaVM *java_vm = NULL;
+static jthread exp_thread = NULL;
+static jvmtiEnv *jvmti2 = NULL;
+static jint agent2_event_count = 0;
+static bool fail_status = false;
+
+static void
+check_jvmti_status(JNIEnv* env, jvmtiError err, const char* msg) {
+ if (err != JVMTI_ERROR_NONE) {
+ printf("check_jvmti_status: JVMTI function returned error: %d\n", err);
+ fail_status = true;
+ env->FatalError(msg);
+ }
+}
+
+static void JNICALL
+CompiledMethodLoad(jvmtiEnv* jvmti, jmethodID method,
+ jint code_size, const void* code_addr,
+ jint map_length, const jvmtiAddrLocationMap* map,
+ const void* compile_info) {
+ JNIEnv* env = NULL;
+ jthread thread = NULL;
+ char* name = NULL;
+ char* sign = NULL;
+ jvmtiError err;
+
+ // Posted on JavaThread's, so it is legal to obtain JNIEnv*
+ if (java_vm->GetEnv((void **) (&env), JNI_VERSION_9) != JNI_OK) {
+ fail_status = true;
+ return;
+ }
+
+ err = jvmti->GetCurrentThread(&thread);
+ check_jvmti_status(env, err, "CompiledMethodLoad: Error in JVMTI GetCurrentThread");
+ if (!env->IsSameObject(thread, exp_thread)) {
+ return; // skip events from unexpected threads
+ }
+ agent2_event_count++;
+
+ err = jvmti->GetMethodName(method, &name, &sign, NULL);
+ check_jvmti_status(env, err, "CompiledMethodLoad: Error in JVMTI GetMethodName");
+
+ printf("%s: CompiledMethodLoad: %s%s\n", AGENT_NAME, name, sign);
+ fflush(0);
+}
+
+JNIEXPORT jint JNICALL
+Agent_OnLoad(JavaVM *jvm, char *options, void *reserved) {
+ jvmtiEventCallbacks callbacks;
+ jvmtiCapabilities caps;
+ jvmtiError err;
+
+ java_vm = jvm;
+ if (jvm->GetEnv((void **) (&jvmti2), JVMTI_VERSION_9) != JNI_OK) {
+ return JNI_ERR;
+ }
+
+ memset(&callbacks, 0, sizeof(callbacks));
+ callbacks.CompiledMethodLoad = &CompiledMethodLoad;
+
+ err = jvmti2->SetEventCallbacks(&callbacks, sizeof(jvmtiEventCallbacks));
+ if (err != JVMTI_ERROR_NONE) {
+ printf("Agent_OnLoad: Error in JVMTI SetEventCallbacks: %d\n", err);
+ fail_status = true;
+ return JNI_ERR;
+ }
+
+ memset(&caps, 0, sizeof(caps));
+ caps.can_generate_compiled_method_load_events = 1;
+
+ err = jvmti2->AddCapabilities(&caps);
+ if (err != JVMTI_ERROR_NONE) {
+ printf("Agent_OnLoad: Error in JVMTI AddCapabilities: %d\n", err);
+ fail_status = true;
+ return JNI_ERR;
+ }
+ return JNI_OK;
+}
+
+JNIEXPORT void JNICALL
+Java_MyPackage_GenerateEventsTest_agent2SetThread(JNIEnv *env, jclass cls, jthread thread) {
+ jvmtiError err;
+
+ exp_thread = (jthread)env->NewGlobalRef(thread);
+
+ err = jvmti2->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_COMPILED_METHOD_LOAD, NULL);
+ check_jvmti_status(env, err, "setThread2: Error in JVMTI SetEventNotificationMode: JVMTI_ENABLE");
+}
+
+JNIEXPORT jboolean JNICALL
+Java_MyPackage_GenerateEventsTest_agent2FailStatus(JNIEnv *env, jclass cls) {
+ jvmtiError err;
+
+ err = jvmti2->SetEventNotificationMode(JVMTI_DISABLE, JVMTI_EVENT_COMPILED_METHOD_LOAD, NULL);
+ check_jvmti_status(env, err, "check2: Error in JVMTI SetEventNotificationMode: JVMTI_DISABLE");
+
+ printf("\n");
+ if (agent2_event_count == 0) {
+ printf("check2: Zero events in agent2 as expected\n");
+ } else {
+ fail_status = true;
+ printf("check2: Unexpected non-zero event count in agent2: %d\n", agent2_event_count);
+ }
+ printf("\n");
+ fflush(0);
+
+ return fail_status;
+}
+
+} // extern "C"