--- a/test/hotspot/jtreg/serviceability/jvmti/HeapMonitor/libHeapMonitorTest.c Thu Mar 14 10:58:53 2019 -0400
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,1217 +0,0 @@
-/*
- * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2018, Google 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 <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "jvmti.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#ifndef JNI_ENV_ARG
-
-#ifdef __cplusplus
-#define JNI_ENV_ARG(x)
-#define JNI_ENV_ARG2(x, y) y
-#define JNI_ENV_ARG3(x, y, z) y, z
-#define JNI_ENV_ARG4(x, y, z, w) y, z, w
-#define JNI_ENV_PTR(x) x
-#else
-#define JNI_ENV_ARG(x) x
-#define JNI_ENV_ARG2(x, y) x, y
-#define JNI_ENV_ARG3(x, y, z) x, y, z
-#define JNI_ENV_ARG4(x, y, z, w) x, y, z, w
-#define JNI_ENV_PTR(x) (*x)
-#endif
-
-#endif
-
-#define TRUE 1
-#define FALSE 0
-#define PRINT_OUT 0
-
-static jvmtiEnv *jvmti = NULL;
-static jvmtiEnv *second_jvmti = NULL;
-
-typedef struct _ObjectTrace{
- jweak object;
- jlong size;
- jvmtiFrameInfo* frames;
- size_t frame_count;
- jthread thread;
-} ObjectTrace;
-
-typedef struct _EventStorage {
- int live_object_additions;
- int live_object_size;
- int live_object_count;
- ObjectTrace** live_objects;
-
- int garbage_history_size;
- int garbage_history_index;
- ObjectTrace** garbage_collected_objects;
-
- // Two separate monitors to separate storage data race and the compaction field
- // data race.
- jrawMonitorID storage_monitor;
-
- int compaction_required;
- jrawMonitorID compaction_monitor;
-} EventStorage;
-
-typedef struct _ExpectedContentFrame {
- const char *name;
- const char *signature;
- const char *file_name;
- int line_number;
-} ExpectedContentFrame;
-
-static
-void event_storage_lock(EventStorage* storage) {
- (*jvmti)->RawMonitorEnter(jvmti, storage->storage_monitor);
-}
-
-static
-void event_storage_unlock(EventStorage* storage) {
- (*jvmti)->RawMonitorExit(jvmti, storage->storage_monitor);
-}
-
-static
-void event_storage_lock_compaction(EventStorage* storage) {
- (*jvmti)->RawMonitorEnter(jvmti, storage->compaction_monitor);
-}
-
-static
-void event_storage_unlock_compaction(EventStorage* storage) {
- (*jvmti)->RawMonitorExit(jvmti, storage->compaction_monitor);
-}
-
-// Given a method and a location, this method gets the line number.
-static
-jint get_line_number(jvmtiEnv* jvmti, jmethodID method,
- jlocation location) {
- // Read the line number table.
- jvmtiLineNumberEntry *table_ptr = 0;
- jint line_number_table_entries;
- int l;
- jlocation last_location;
- int jvmti_error = (*jvmti)->GetLineNumberTable(jvmti, method,
- &line_number_table_entries,
- &table_ptr);
-
- if (JVMTI_ERROR_NONE != jvmti_error) {
- return -1;
- }
- if (line_number_table_entries <= 0) {
- return -1;
- }
- if (line_number_table_entries == 1) {
- return table_ptr[0].line_number;
- }
-
- // Go through all the line numbers...
- last_location = table_ptr[0].start_location;
- for (l = 1; l < line_number_table_entries; l++) {
- // ... and if you see one that is in the right place for your
- // location, you've found the line number!
- if ((location < table_ptr[l].start_location) &&
- (location >= last_location)) {
- return table_ptr[l - 1].line_number;
- }
- last_location = table_ptr[l].start_location;
- }
-
- if (location >= last_location) {
- return table_ptr[line_number_table_entries - 1].line_number;
- } else {
- return -1;
- }
-}
-
-static void print_out_frames(JNIEnv* env, ObjectTrace* trace) {
- jvmtiFrameInfo* frames = trace->frames;
- size_t i;
- for (i = 0; i < trace->frame_count; i++) {
- // Get basic information out of the trace.
- jlocation bci = frames[i].location;
- jmethodID methodid = frames[i].method;
- char *name = NULL, *signature = NULL, *file_name = NULL;
- jclass declaring_class;
- int line_number;
- jvmtiError err;
-
- if (bci < 0) {
- fprintf(stderr, "\tNative frame\n");
- continue;
- }
-
- // Transform into usable information.
- line_number = get_line_number(jvmti, methodid, bci);
- if (JVMTI_ERROR_NONE !=
- (*jvmti)->GetMethodName(jvmti, methodid, &name, &signature, 0)) {
- fprintf(stderr, "\tUnknown method name\n");
- continue;
- }
-
- if (JVMTI_ERROR_NONE !=
- (*jvmti)->GetMethodDeclaringClass(jvmti, methodid, &declaring_class)) {
- fprintf(stderr, "\tUnknown class\n");
- continue;
- }
-
- err = (*jvmti)->GetSourceFileName(jvmti, declaring_class,
- &file_name);
- if (err != JVMTI_ERROR_NONE) {
- fprintf(stderr, "\tUnknown file\n");
- continue;
- }
-
- // Compare now, none should be NULL.
- if (name == NULL) {
- fprintf(stderr, "\tUnknown name\n");
- continue;
- }
-
- if (file_name == NULL) {
- fprintf(stderr, "\tUnknown file\n");
- continue;
- }
-
- if (signature == NULL) {
- fprintf(stderr, "\tUnknown signature\n");
- continue;
- }
-
- fprintf(stderr, "\t%s%s (%s: %d)\n",
- name, signature, file_name, line_number);
- }
-}
-
-static jboolean check_sample_content(JNIEnv* env,
- ObjectTrace* trace,
- ExpectedContentFrame *expected,
- size_t expected_count,
- jboolean check_lines,
- int print_out_comparisons) {
- jvmtiFrameInfo* frames;
- size_t i;
-
- if (expected_count > trace->frame_count) {
- return FALSE;
- }
-
- frames = trace->frames;
- for (i = 0; i < expected_count; i++) {
- // Get basic information out of the trace.
- jlocation bci = frames[i].location;
- jmethodID methodid = frames[i].method;
- char *name = NULL, *signature = NULL, *file_name = NULL;
- jclass declaring_class;
- int line_number;
- jboolean differ;
- jvmtiError err;
-
- if (bci < 0 && expected[i].line_number != -1) {
- return FALSE;
- }
-
- // Transform into usable information.
- line_number = get_line_number(jvmti, methodid, bci);
- (*jvmti)->GetMethodName(jvmti, methodid, &name, &signature, 0);
-
- if (JVMTI_ERROR_NONE !=
- (*jvmti)->GetMethodDeclaringClass(jvmti, methodid, &declaring_class)) {
- return FALSE;
- }
-
- err = (*jvmti)->GetSourceFileName(jvmti, declaring_class,
- &file_name);
- if (err != JVMTI_ERROR_NONE) {
- return FALSE;
- }
-
- // Compare now, none should be NULL.
- if (name == NULL) {
- return FALSE;
- }
-
- if (file_name == NULL) {
- return FALSE;
- }
-
- if (signature == NULL) {
- return FALSE;
- }
-
- differ = (strcmp(name, expected[i].name) ||
- strcmp(signature, expected[i].signature) ||
- strcmp(file_name, expected[i].file_name) ||
- (check_lines && line_number != expected[i].line_number));
-
- if (print_out_comparisons) {
- fprintf(stderr, "\tComparing: (check_lines: %d)\n", check_lines);
- fprintf(stderr, "\t\tNames: %s and %s\n", name, expected[i].name);
- fprintf(stderr, "\t\tSignatures: %s and %s\n", signature, expected[i].signature);
- fprintf(stderr, "\t\tFile name: %s and %s\n", file_name, expected[i].file_name);
- fprintf(stderr, "\t\tLines: %d and %d\n", line_number, expected[i].line_number);
- fprintf(stderr, "\t\tResult is %d\n", differ);
- }
-
- if (differ) {
- return FALSE;
- }
- }
-
- return TRUE;
-}
-
-// Static native API for various tests.
-static int fill_native_frames(JNIEnv* env, jobjectArray frames,
- ExpectedContentFrame* native_frames, size_t size) {
- size_t i;
- for (i = 0; i < size; i++) {
- jclass frame_class = NULL;
- jfieldID line_number_field_id = 0;
- int line_number = 0;
- jfieldID string_id = 0;
- jstring string_object = NULL;
- const char* method = NULL;
- const char* file_name = NULL;
- const char* signature = NULL;
-
- jobject obj = JNI_ENV_PTR(env)->GetObjectArrayElement(
- JNI_ENV_ARG3(env, frames, (jsize) i));
-
- if (JNI_ENV_PTR(env)->ExceptionOccurred(JNI_ENV_ARG(env))) {
- fprintf(stderr, "fill_native_frames: Exception in jni GetObjectArrayElement\n");
- return -1;
- }
-
- frame_class = JNI_ENV_PTR(env)->GetObjectClass(JNI_ENV_ARG2(env, obj));
-
- if (JNI_ENV_PTR(env)->ExceptionOccurred(JNI_ENV_ARG(env))) {
- fprintf(stderr, "fill_native_frames: Exception in jni GetObjectClass\n");
- return -1;
- }
-
- line_number_field_id =
- JNI_ENV_PTR(env)->GetFieldID(JNI_ENV_ARG4(env, frame_class, "lineNumber", "I"));
-
- if (JNI_ENV_PTR(env)->ExceptionOccurred(JNI_ENV_ARG(env))) {
- fprintf(stderr, "fill_native_frames: Exception in jni GetFieldID\n");
- return -1;
- }
-
- line_number = JNI_ENV_PTR(env)->GetIntField(JNI_ENV_ARG3(env, obj, line_number_field_id));
-
- if (JNI_ENV_PTR(env)->ExceptionOccurred(JNI_ENV_ARG(env))) {
- fprintf(stderr, "fill_native_frames: Exception in jni GetIntField\n");
- return -1;
- }
-
- string_id = JNI_ENV_PTR(env)->GetFieldID(
- JNI_ENV_ARG4(env, frame_class, "method", "Ljava/lang/String;"));
-
- if (JNI_ENV_PTR(env)->ExceptionOccurred(JNI_ENV_ARG(env))) {
- fprintf(stderr, "fill_native_frames: Exception in jni GetFieldID\n");
- return -1;
- }
-
- string_object = (jstring) JNI_ENV_PTR(env)->GetObjectField(
- JNI_ENV_ARG3(env, obj, string_id));
-
- if (JNI_ENV_PTR(env)->ExceptionOccurred(JNI_ENV_ARG(env))) {
- fprintf(stderr, "fill_native_frames: Exception in jni GetObjectField\n");
- return -1;
- }
-
- method = JNI_ENV_PTR(env)->GetStringUTFChars(JNI_ENV_ARG3(env, string_object, 0));
-
- if (JNI_ENV_PTR(env)->ExceptionOccurred(JNI_ENV_ARG(env))) {
- fprintf(stderr, "Exception in jni GetStringUTFChars\n");
- return -1;
- }
-
- string_id = JNI_ENV_PTR(env)->GetFieldID(
- JNI_ENV_ARG4(env, frame_class, "fileName", "Ljava/lang/String;"));
-
- if (JNI_ENV_PTR(env)->ExceptionOccurred(JNI_ENV_ARG(env))) {
- fprintf(stderr, "Exception in jni GetFieldID\n");
- return -1;
- }
-
- string_object =
- (jstring) (JNI_ENV_PTR(env)->GetObjectField(
- JNI_ENV_ARG3(env, obj, string_id)));
-
- if (JNI_ENV_PTR(env)->ExceptionOccurred(JNI_ENV_ARG(env))) {
- fprintf(stderr, "fill_native_frames: Exception in second jni GetObjectField\n");
- return -1;
- }
-
- file_name = JNI_ENV_PTR(env)->GetStringUTFChars(
- JNI_ENV_ARG3(env, string_object, 0));
-
- if (JNI_ENV_PTR(env)->ExceptionOccurred(JNI_ENV_ARG(env))) {
- fprintf(stderr, "fill_native_frames: Exception in jni GetStringUTFChars\n");
- return -1;
- }
-
- string_id = JNI_ENV_PTR(env)->GetFieldID(
- JNI_ENV_ARG4(env, frame_class, "signature", "Ljava/lang/String;"));
-
- if (JNI_ENV_PTR(env)->ExceptionOccurred(JNI_ENV_ARG(env))) {
- fprintf(stderr, "fill_native_frames: Exception in second jni GetFieldID\n");
- return -1;
- }
-
- string_object =
- (jstring) (JNI_ENV_PTR(env)->GetObjectField(
- JNI_ENV_ARG3(env, obj, string_id)));
-
- if (JNI_ENV_PTR(env)->ExceptionOccurred(JNI_ENV_ARG(env))) {
- fprintf(stderr, "fill_native_frames: Exception in third jni GetObjectField\n");
- return -1;
- }
-
- signature = JNI_ENV_PTR(env)->GetStringUTFChars(
- JNI_ENV_ARG3(env, string_object, 0));
-
- if (JNI_ENV_PTR(env)->ExceptionOccurred(JNI_ENV_ARG(env))) {
- fprintf(stderr, "fill_native_frames: Exception in jni GetStringUTFChars\n");
- return -1;
- }
-
- native_frames[i].name = method;
- native_frames[i].file_name = file_name;
- native_frames[i].signature = signature;
- native_frames[i].line_number = line_number;
- }
-
- return 0;
-}
-
-// Internal storage system implementation.
-static EventStorage global_event_storage;
-static EventStorage second_global_event_storage;
-
-static void event_storage_set_compaction_required(EventStorage* storage) {
- event_storage_lock_compaction(storage);
- storage->compaction_required = 1;
- event_storage_unlock_compaction(storage);
-}
-
-static int event_storage_get_compaction_required(EventStorage* storage) {
- int result;
- event_storage_lock_compaction(storage);
- result = storage->compaction_required;
- event_storage_unlock_compaction(storage);
- return result;
-}
-
-static void event_storage_set_garbage_history(EventStorage* storage, int value) {
- size_t size;
- event_storage_lock(storage);
- global_event_storage.garbage_history_size = value;
- free(global_event_storage.garbage_collected_objects);
- size = sizeof(*global_event_storage.garbage_collected_objects) * value;
- global_event_storage.garbage_collected_objects = malloc(size);
- memset(global_event_storage.garbage_collected_objects, 0, size);
- event_storage_unlock(storage);
-}
-
-// No mutex here, it is handled by the caller.
-static void event_storage_add_garbage_collected_object(EventStorage* storage,
- ObjectTrace* object) {
- int idx = storage->garbage_history_index;
- ObjectTrace* old_object = storage->garbage_collected_objects[idx];
- if (old_object != NULL) {
- free(old_object->frames);
- free(storage->garbage_collected_objects[idx]);
- }
-
- storage->garbage_collected_objects[idx] = object;
- storage->garbage_history_index = (idx + 1) % storage->garbage_history_size;
-}
-
-static int event_storage_get_count(EventStorage* storage) {
- int result;
- event_storage_lock(storage);
- result = storage->live_object_count;
- event_storage_unlock(storage);
- return result;
-}
-
-static double event_storage_get_average_size(EventStorage* storage) {
- double accumulation = 0;
- int max_size;
- int i;
-
- event_storage_lock(storage);
- max_size = storage->live_object_count;
-
- for (i = 0; i < max_size; i++) {
- accumulation += storage->live_objects[i]->size;
- }
-
- event_storage_unlock(storage);
- return accumulation / max_size;
-}
-
-static jboolean event_storage_contains(JNIEnv* env,
- EventStorage* storage,
- ExpectedContentFrame* frames,
- size_t size,
- jboolean check_lines) {
- int i;
- event_storage_lock(storage);
- fprintf(stderr, "Checking storage count %d\n", storage->live_object_count);
- for (i = 0; i < storage->live_object_count; i++) {
- ObjectTrace* trace = storage->live_objects[i];
-
- if (check_sample_content(env, trace, frames, size, check_lines, PRINT_OUT)) {
- event_storage_unlock(storage);
- return TRUE;
- }
- }
- event_storage_unlock(storage);
- return FALSE;
-}
-
-static jlong event_storage_get_size(JNIEnv* env,
- EventStorage* storage,
- ExpectedContentFrame* frames,
- size_t size,
- jboolean check_lines) {
- int i;
- event_storage_lock(storage);
- fprintf(stderr, "Getting element from storage count, size %d\n", storage->live_object_count);
- for (i = 0; i < storage->live_object_count; i++) {
- ObjectTrace* trace = storage->live_objects[i];
-
- if (check_sample_content(env, trace, frames, size, check_lines, PRINT_OUT)) {
- jlong result = trace->size;
- event_storage_unlock(storage);
- return result;
- }
- }
- event_storage_unlock(storage);
- return 0;
-}
-
-static jboolean event_storage_garbage_contains(JNIEnv* env,
- EventStorage* storage,
- ExpectedContentFrame* frames,
- size_t size,
- jboolean check_lines) {
- int i;
- event_storage_lock(storage);
- fprintf(stderr, "Checking garbage storage count %d\n",
- storage->garbage_history_size);
- for (i = 0; i < storage->garbage_history_size; i++) {
- ObjectTrace* trace = storage->garbage_collected_objects[i];
-
- if (trace == NULL) {
- continue;
- }
-
- if (check_sample_content(env, trace, frames, size, check_lines, PRINT_OUT)) {
- event_storage_unlock(storage);
- return TRUE;
- }
- }
- event_storage_unlock(storage);
- return FALSE;
-}
-
-// No mutex here, handled by the caller.
-static void event_storage_augment_storage(EventStorage* storage) {
- int new_max = (storage->live_object_size * 2) + 1;
- ObjectTrace** new_objects = malloc(new_max * sizeof(*new_objects));
-
- int current_count = storage->live_object_count;
- memcpy(new_objects, storage->live_objects, current_count * sizeof(*new_objects));
- free(storage->live_objects);
- storage->live_objects = new_objects;
- storage->live_object_size = new_max;
-}
-
-static void event_storage_add(EventStorage* storage,
- JNIEnv* jni,
- jthread thread,
- jobject object,
- jclass klass,
- jlong size) {
- jvmtiFrameInfo frames[64];
- jint count;
- jvmtiError err;
-
- err = (*jvmti)->GetStackTrace(jvmti, thread, 0, 64, frames, &count);
- if (err == JVMTI_ERROR_NONE && count >= 1) {
- ObjectTrace* live_object;
- jvmtiFrameInfo* allocated_frames = (jvmtiFrameInfo*) malloc(count * sizeof(*allocated_frames));
- memcpy(allocated_frames, frames, count * sizeof(*allocated_frames));
-
- live_object = (ObjectTrace*) malloc(sizeof(*live_object));
- live_object->frames = allocated_frames;
- live_object->frame_count = count;
- live_object->size = size;
- live_object->thread = thread;
- live_object->object = (*jni)->NewWeakGlobalRef(jni, object);
-
- if (JNI_ENV_PTR(jni)->ExceptionOccurred(JNI_ENV_ARG(jni))) {
- JNI_ENV_PTR(jni)->FatalError(
- JNI_ENV_ARG2(jni, "Error in event_storage_add: Exception in jni NewWeakGlobalRef"));
- }
-
- // Only now lock and get things done quickly.
- event_storage_lock(storage);
-
- storage->live_object_additions++;
-
- if (storage->live_object_count >= storage->live_object_size) {
- event_storage_augment_storage(storage);
- }
- assert(storage->live_object_count < storage->live_object_size);
-
- if (PRINT_OUT) {
- fprintf(stderr, "Adding trace for thread %p, frame_count %d, storage %p\n",
- thread, count, storage);
- print_out_frames(jni, live_object);
- }
- storage->live_objects[storage->live_object_count] = live_object;
- storage->live_object_count++;
-
- event_storage_unlock(storage);
- }
-}
-
-static void event_storage_compact(EventStorage* storage, JNIEnv* jni) {
- int max, i, dest;
- ObjectTrace** live_objects;
-
- event_storage_lock_compaction(storage);
- storage->compaction_required = 0;
- event_storage_unlock_compaction(storage);
-
- event_storage_lock(storage);
-
- max = storage->live_object_count;
- live_objects = storage->live_objects;
-
- for (i = 0, dest = 0; i < max; i++) {
- ObjectTrace* live_object = live_objects[i];
- jweak object = live_object->object;
-
- if (!(*jni)->IsSameObject(jni, object, NULL)) {
- if (dest != i) {
- live_objects[dest] = live_object;
- dest++;
- }
- } else {
- (*jni)->DeleteWeakGlobalRef(jni, object);
- live_object->object = NULL;
-
- event_storage_add_garbage_collected_object(storage, live_object);
- }
- }
-
- storage->live_object_count = dest;
- event_storage_unlock(storage);
-}
-
-static void event_storage_free_objects(ObjectTrace** array, int max) {
- int i;
- for (i = 0; i < max; i++) {
- free(array[i]), array[i] = NULL;
- }
-}
-
-static void event_storage_reset(EventStorage* storage) {
- event_storage_lock(storage);
-
- // Reset everything except the mutex and the garbage collection.
- event_storage_free_objects(storage->live_objects,
- storage->live_object_count);
- storage->live_object_additions = 0;
- storage->live_object_size = 0;
- storage->live_object_count = 0;
- free(storage->live_objects), storage->live_objects = NULL;
-
- event_storage_free_objects(storage->garbage_collected_objects,
- storage->garbage_history_size);
-
- storage->compaction_required = 0;
- storage->garbage_history_index = 0;
-
- event_storage_unlock(storage);
-}
-
-static int event_storage_number_additions(EventStorage* storage) {
- int result;
- event_storage_lock(storage);
- result = storage->live_object_additions;
- event_storage_unlock(storage);
- return result;
-}
-
-// Start of the JVMTI agent code.
-static const char *EXC_CNAME = "java/lang/Exception";
-
-static int check_error(jvmtiError err, const char *s) {
- if (err != JVMTI_ERROR_NONE) {
- printf(" ## %s error: %d\n", s, err);
- return 1;
- }
- return 0;
-}
-
-static int check_capability_error(jvmtiError err, const char *s) {
- if (err != JVMTI_ERROR_NONE) {
- if (err == JVMTI_ERROR_MUST_POSSESS_CAPABILITY) {
- return 0;
- }
- fprintf(stderr, " ## %s error: %d\n", s, err);
- }
- return 1;
-}
-
-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_1_8;
-}
-
-#define MAX_THREADS 500
-
-typedef struct ThreadStats {
- int thread_count;
- int counts[MAX_THREADS];
- char* threads[MAX_THREADS];
-} ThreadStats;
-
-static ThreadStats thread_stats;
-
-JNIEXPORT jboolean JNICALL
-Java_MyPackage_HeapMonitorThreadDisabledTest_checkThreadSamplesOnlyFrom(
- JNIEnv* env, jclass cls, jthread thread) {
- jvmtiThreadInfo info;
- jvmtiError err;
- char* expected_name;
- int found_thread = FALSE;
-
- err = (*jvmti)->GetThreadInfo(jvmti, thread, &info);
- expected_name = info.name;
-
- if (err != JVMTI_ERROR_NONE) {
- fprintf(stderr, "Failed to get thread information\n");
- return FALSE;
- }
-
- if (thread_stats.thread_count != 1) {
- fprintf(stderr, "Wrong thread number: %d (expected 1)\n",
- thread_stats.thread_count);
- return FALSE;
- }
-
- if (strcmp(expected_name, thread_stats.threads[0]) != 0) {
- fprintf(stderr, "Unexpected thread name: '%s' (expected '%s')\n",
- thread_stats.threads[0], expected_name);
- return FALSE;
- }
-
- return TRUE;
-}
-
-static void add_thread_count(jthread thread) {
- int i;
- jvmtiThreadInfo info;
- jvmtiError err;
-
- err = (*jvmti)->GetThreadInfo(jvmti, thread, &info);
- if (err != JVMTI_ERROR_NONE) {
- fprintf(stderr, "Thread info for %p failed, ignoring thread count\n",
- thread);
- return;
- }
-
- event_storage_lock(&global_event_storage);
- for (i = 0; i < thread_stats.thread_count; i++) {
- if (!strcmp(thread_stats.threads[i], info.name)) {
- thread_stats.counts[i]++;
- event_storage_unlock(&global_event_storage);
- return;
- }
- }
-
- thread_stats.threads[thread_stats.thread_count] = info.name;
- thread_stats.counts[thread_stats.thread_count]++;
- thread_stats.thread_count++;
- event_storage_unlock(&global_event_storage);
-}
-
-JNIEXPORT void JNICALL
-Java_MyPackage_HeapMonitorThreadDisabledTest_enableSamplingEvents(
- JNIEnv* env, jclass cls, jthread thread) {
- fprintf(stderr, "Enabling for %p\n", thread);
- check_error((*jvmti)->SetEventNotificationMode(
- jvmti, JVMTI_ENABLE, JVMTI_EVENT_SAMPLED_OBJECT_ALLOC, thread),
- "Set event notifications for a single thread");
-}
-
-static void print_thread_stats() {
- int i;
- event_storage_lock(&global_event_storage);
- fprintf(stderr, "Thread count:\n");
- for (i = 0; i < thread_stats.thread_count; i++) {
- fprintf(stderr, "\t%s: %d\n", thread_stats.threads[i], thread_stats.counts[i]);
- }
- event_storage_unlock(&global_event_storage);
-}
-
-JNIEXPORT
-void JNICALL SampledObjectAlloc(jvmtiEnv *jvmti_env,
- JNIEnv* jni_env,
- jthread thread,
- jobject object,
- jclass object_klass,
- jlong size) {
- add_thread_count(thread);
-
- if (event_storage_get_compaction_required(&global_event_storage)) {
- event_storage_compact(&global_event_storage, jni_env);
- }
-
- event_storage_add(&global_event_storage, jni_env, thread, object,
- object_klass, size);
-}
-
-JNIEXPORT
-void JNICALL VMObjectAlloc(jvmtiEnv *jvmti_env,
- JNIEnv* jni_env,
- jthread thread,
- jobject object,
- jclass object_klass,
- jlong size) {
- event_storage_add(&second_global_event_storage, jni_env, thread, object,
- object_klass, size);
-}
-
-JNIEXPORT
-void JNICALL GarbageCollectionFinish(jvmtiEnv *jvmti_env) {
- event_storage_set_compaction_required(&global_event_storage);
-}
-
-static int enable_notifications() {
- if (check_error((*jvmti)->SetEventNotificationMode(
- jvmti, JVMTI_ENABLE, JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, NULL),
- "Set event notifications")) {
- return 1;
- }
-
- return check_error((*jvmti)->SetEventNotificationMode(
- jvmti, JVMTI_ENABLE, JVMTI_EVENT_SAMPLED_OBJECT_ALLOC, NULL),
- "Set event notifications");
-}
-
-static
-jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
- jint res;
- jvmtiEventCallbacks callbacks;
- jvmtiCapabilities caps;
-
- res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG3(jvm, (void **) &jvmti,
- JVMTI_VERSION_9));
- if (res != JNI_OK || jvmti == NULL) {
- fprintf(stderr, "Error: wrong result of a valid call to GetEnv!\n");
- return JNI_ERR;
- }
-
- // Get second jvmti environment.
- res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG3(jvm, (void **) &second_jvmti,
- JVMTI_VERSION_9));
- if (res != JNI_OK || second_jvmti == NULL) {
- fprintf(stderr, "Error: wrong result of a valid second call to GetEnv!\n");
- return JNI_ERR;
- }
-
- if (PRINT_OUT) {
- fprintf(stderr, "Storage is at %p, secondary is at %p\n",
- &global_event_storage, &second_global_event_storage);
- }
-
- (*jvmti)->CreateRawMonitor(jvmti, "storage_monitor",
- &global_event_storage.storage_monitor);
- (*jvmti)->CreateRawMonitor(jvmti, "second_storage_monitor",
- &second_global_event_storage.storage_monitor);
-
- (*jvmti)->CreateRawMonitor(jvmti, "compaction_monitor",
- &global_event_storage.compaction_monitor);
- (*jvmti)->CreateRawMonitor(jvmti, "second_compaction_monitor",
- &second_global_event_storage.compaction_monitor);
-
- event_storage_set_garbage_history(&global_event_storage, 200);
- event_storage_set_garbage_history(&second_global_event_storage, 200);
-
- memset(&callbacks, 0, sizeof(callbacks));
- callbacks.SampledObjectAlloc = &SampledObjectAlloc;
- callbacks.VMObjectAlloc = &VMObjectAlloc;
- callbacks.GarbageCollectionFinish = &GarbageCollectionFinish;
-
- memset(&caps, 0, sizeof(caps));
- // Get line numbers, sample events, filename, and gc events for the tests.
- caps.can_get_line_numbers = 1;
- caps.can_get_source_file_name = 1;
- caps.can_generate_garbage_collection_events = 1;
- caps.can_generate_sampled_object_alloc_events = 1;
- caps.can_generate_vm_object_alloc_events = 1;
- if (check_error((*jvmti)->AddCapabilities(jvmti, &caps), "Add capabilities")) {
- return JNI_ERR;
- }
-
- if (check_error((*jvmti)->SetEventCallbacks(jvmti, &callbacks,
- sizeof(jvmtiEventCallbacks)),
- " Set Event Callbacks")) {
- return JNI_ERR;
- }
- return JNI_OK;
-}
-
-JNIEXPORT void JNICALL
-Java_MyPackage_HeapMonitor_setSamplingInterval(JNIEnv* env, jclass cls, jint value) {
- (*jvmti)->SetHeapSamplingInterval(jvmti, value);
-}
-
-JNIEXPORT jboolean JNICALL
-Java_MyPackage_HeapMonitor_eventStorageIsEmpty(JNIEnv* env, jclass cls) {
- return event_storage_get_count(&global_event_storage) == 0;
-}
-
-JNIEXPORT jint JNICALL
-Java_MyPackage_HeapMonitor_getEventStorageElementCount(JNIEnv* env, jclass cls) {
- return event_storage_get_count(&global_event_storage);
-}
-
-JNIEXPORT void JNICALL
-Java_MyPackage_HeapMonitor_enableSamplingEvents(JNIEnv* env, jclass cls) {
- enable_notifications();
-}
-
-JNIEXPORT void JNICALL
-Java_MyPackage_HeapMonitor_disableSamplingEvents(JNIEnv* env, jclass cls) {
- check_error((*jvmti)->SetEventNotificationMode(
- jvmti, JVMTI_DISABLE, JVMTI_EVENT_SAMPLED_OBJECT_ALLOC, NULL),
- "Set event notifications");
-
- check_error((*jvmti)->SetEventNotificationMode(
- jvmti, JVMTI_DISABLE, JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, NULL),
- "Garbage Collection Finish");
-}
-
-static ExpectedContentFrame *get_native_frames(JNIEnv* env, jclass cls,
- jobjectArray frames) {
- ExpectedContentFrame *native_frames;
- jsize size = JNI_ENV_PTR(env)->GetArrayLength(JNI_ENV_ARG2(env, frames));
-
- if (JNI_ENV_PTR(env)->ExceptionOccurred(JNI_ENV_ARG(env))) {
- JNI_ENV_PTR(env)->FatalError(
- JNI_ENV_ARG2(env, "get_native_frames failed with the GetArrayLength call"));
- }
-
- native_frames = malloc(size * sizeof(*native_frames));
-
- if (native_frames == NULL) {
- JNI_ENV_PTR(env)->FatalError(
- JNI_ENV_ARG2(env,
- "Error in get_native_frames: malloc returned NULL\n"));
- }
-
- if (fill_native_frames(env, frames, native_frames, size) != 0) {
- JNI_ENV_PTR(env)->FatalError(
- JNI_ENV_ARG2(env,
- "Error in get_native_frames: fill_native_frames returned failed status\n"));
- }
-
- return native_frames;
-}
-
-JNIEXPORT jboolean JNICALL
-Java_MyPackage_HeapMonitor_obtainedEvents(JNIEnv* env, jclass cls,
- jobjectArray frames,
- jboolean check_lines) {
- jboolean result;
- jsize size = JNI_ENV_PTR(env)->GetArrayLength(JNI_ENV_ARG2(env, frames));
- ExpectedContentFrame *native_frames = get_native_frames(env, cls, frames);
-
- result = event_storage_contains(env, &global_event_storage, native_frames,
- size, check_lines);
-
- free(native_frames), native_frames = NULL;
- return result;
-}
-
-JNIEXPORT jboolean JNICALL
-Java_MyPackage_HeapMonitor_garbageContains(JNIEnv* env, jclass cls,
- jobjectArray frames,
- jboolean check_lines) {
- jboolean result;
- jsize size = JNI_ENV_PTR(env)->GetArrayLength(JNI_ENV_ARG2(env, frames));
- ExpectedContentFrame *native_frames = get_native_frames(env, cls, frames);
-
- result = event_storage_garbage_contains(env, &global_event_storage,
- native_frames, size, check_lines);
-
- free(native_frames), native_frames = NULL;
- return result;
-}
-
-JNIEXPORT jlong JNICALL
-Java_MyPackage_HeapMonitor_getSize(JNIEnv* env, jclass cls,
- jobjectArray frames,
- jboolean check_lines) {
- jlong result = 0;
- jsize size = JNI_ENV_PTR(env)->GetArrayLength(JNI_ENV_ARG2(env, frames));
- ExpectedContentFrame *native_frames = get_native_frames(env, cls, frames);
-
- result = event_storage_get_size(env, &global_event_storage,
- native_frames, size, check_lines);
-
- free(native_frames), native_frames = NULL;
- return result;
-}
-
-JNIEXPORT void JNICALL
-Java_MyPackage_HeapMonitor_forceGarbageCollection(JNIEnv* env, jclass cls) {
- check_error((*jvmti)->ForceGarbageCollection(jvmti),
- "Forced Garbage Collection");
-}
-
-JNIEXPORT void JNICALL
-Java_MyPackage_HeapMonitor_resetEventStorage(JNIEnv* env, jclass cls) {
- event_storage_reset(&global_event_storage);
- event_storage_reset(&second_global_event_storage);
-}
-
-JNIEXPORT jboolean JNICALL
-Java_MyPackage_HeapMonitorNoCapabilityTest_allSamplingMethodsFail(JNIEnv *env,
- jclass cls) {
- jvmtiCapabilities caps;
- memset(&caps, 0, sizeof(caps));
- caps.can_generate_sampled_object_alloc_events = 1;
- if (check_error((*jvmti)->RelinquishCapabilities(jvmti, &caps),
- "Add capabilities\n")){
- return FALSE;
- }
-
- if (check_capability_error((*jvmti)->SetHeapSamplingInterval(jvmti, 1<<19),
- "Set Heap Sampling Interval")) {
- return FALSE;
- }
- return TRUE;
-}
-
-JNIEXPORT jboolean JNICALL
-Java_MyPackage_HeapMonitorIllegalArgumentTest_testIllegalArgument(JNIEnv *env,
- jclass cls) {
- if (check_error((*jvmti)->SetHeapSamplingInterval(jvmti, 0),
- "Sampling interval 0 failed\n")){
- return FALSE;
- }
-
- if (check_error((*jvmti)->SetHeapSamplingInterval(jvmti, 1024),
- "Sampling interval 1024 failed\n")){
- return FALSE;
- }
-
- if (!check_error((*jvmti)->SetHeapSamplingInterval(jvmti, -1),
- "Sampling interval -1 passed\n")){
- return FALSE;
- }
-
- if (!check_error((*jvmti)->SetHeapSamplingInterval(jvmti, -1024),
- "Sampling interval -1024 passed\n")){
- return FALSE;
- }
-
- return TRUE;
-}
-
-JNIEXPORT jdouble JNICALL
-Java_MyPackage_HeapMonitor_getAverageSize(JNIEnv *env, jclass cls) {
- return event_storage_get_average_size(&global_event_storage);
-}
-
-typedef struct sThreadsFound {
- jthread* threads;
- int num_threads;
-} ThreadsFound;
-
-JNIEXPORT jboolean JNICALL
-Java_MyPackage_HeapMonitorThreadTest_checkSamples(JNIEnv* env, jclass cls,
- jint num_threads) {
- print_thread_stats();
- // Ensure we got stacks from at least num_threads.
- return thread_stats.thread_count >= num_threads;
-}
-
-JNIEXPORT
-void JNICALL SampledObjectAlloc2(jvmtiEnv *jvmti_env,
- JNIEnv* jni_env,
- jthread thread,
- jobject object,
- jclass object_klass,
- jlong size) {
- // Nop for now, two agents are not yet implemented.
- assert(0);
-}
-
-JNIEXPORT jboolean JNICALL
-Java_MyPackage_HeapMonitorTwoAgentsTest_enablingSamplingInSecondaryAgent(
- JNIEnv* env, jclass cls) {
- // Currently this method should be failing directly at the AddCapability step
- // but the implementation is correct for when multi-agent support is enabled.
- jvmtiCapabilities caps;
- jvmtiEventCallbacks callbacks;
-
- memset(&caps, 0, sizeof(caps));
- caps.can_generate_sampled_object_alloc_events = 1;
- if (check_error((*second_jvmti)->AddCapabilities(second_jvmti, &caps),
- "Set the capability for second agent")) {
- return FALSE;
- }
-
- memset(&callbacks, 0, sizeof(callbacks));
- callbacks.SampledObjectAlloc = &SampledObjectAlloc2;
-
- if (check_error((*second_jvmti)->SetEventCallbacks(second_jvmti, &callbacks,
- sizeof(jvmtiEventCallbacks)),
- " Set Event Callbacks for second agent")) {
- return FALSE;
- }
-
- return TRUE;
-}
-
-JNIEXPORT void JNICALL
-Java_MyPackage_HeapMonitor_enableVMEvents(JNIEnv* env, jclass cls) {
- check_error((*jvmti)->SetEventNotificationMode(
- jvmti, JVMTI_ENABLE, JVMTI_EVENT_VM_OBJECT_ALLOC, NULL),
- "Set vm event notifications");
-}
-
-JNIEXPORT jint JNICALL
-Java_MyPackage_HeapMonitorVMEventsTest_vmEvents(JNIEnv* env, jclass cls) {
- return event_storage_number_additions(&second_global_event_storage);
-}
-
-JNIEXPORT jint JNICALL
-Java_MyPackage_HeapMonitor_sampledEvents(JNIEnv* env, jclass cls) {
- return event_storage_number_additions(&global_event_storage);
-}
-
-static jobject allocate_object(JNIEnv* env) {
- // Construct an Object.
- jclass cls = JNI_ENV_PTR(env)->FindClass(JNI_ENV_ARG2(env, "java/lang/Object"));
- jmethodID constructor;
- jobject result;
-
- if (JNI_ENV_PTR(env)->ExceptionOccurred(JNI_ENV_ARG(env)) || cls == NULL) {
- JNI_ENV_PTR(env)->FatalError(
- JNI_ENV_ARG2(env, "Error in jni FindClass: Cannot find Object class\n"));
- }
-
- constructor = JNI_ENV_PTR(env)->GetMethodID(JNI_ENV_ARG4(env, cls, "<init>", "()V"));
- if (JNI_ENV_PTR(env)->ExceptionOccurred(JNI_ENV_ARG(env)) || constructor == NULL) {
- JNI_ENV_PTR(env)->FatalError(
- JNI_ENV_ARG2(env, "Error in jni GetMethodID: Cannot find Object class constructor\n"));
- }
-
- // Call back constructor to allocate a new instance, with an int argument
- result = JNI_ENV_PTR(env)->NewObject(JNI_ENV_ARG3(env, cls, constructor));
-
- if (JNI_ENV_PTR(env)->ExceptionOccurred(JNI_ENV_ARG(env)) || result == NULL) {
- JNI_ENV_PTR(env)->FatalError(
- JNI_ENV_ARG2(env, "Error in jni NewObject: Cannot allocate an object\n"));
- }
- return result;
-}
-
-// Ensure we got a callback for the test.
-static int did_recursive_callback_test;
-
-JNIEXPORT
-void JNICALL RecursiveSampledObjectAlloc(jvmtiEnv *jvmti_env,
- JNIEnv* jni_env,
- jthread thread,
- jobject object,
- jclass object_klass,
- jlong size) {
- // Basically ensure that if we were to allocate objects, we would not have an
- // infinite recursion here.
- int i;
- for (i = 0; i < 1000; i++) {
- if (allocate_object(jni_env) == NULL) {
- JNI_ENV_PTR(jni_env)->FatalError(JNI_ENV_ARG2(jni_env, "allocate_object returned NULL\n"));
- }
- }
-
- did_recursive_callback_test = 1;
-}
-
-JNIEXPORT jboolean JNICALL
-Java_MyPackage_HeapMonitorRecursiveTest_didCallback(JNIEnv* env, jclass cls) {
- return did_recursive_callback_test != 0;
-}
-
-JNIEXPORT void JNICALL
-Java_MyPackage_HeapMonitorRecursiveTest_setCallbackToCallAllocateSomeMore(JNIEnv* env, jclass cls) {
- jvmtiEventCallbacks callbacks;
-
- memset(&callbacks, 0, sizeof(callbacks));
- callbacks.SampledObjectAlloc = &RecursiveSampledObjectAlloc;
-
- if (check_error((*jvmti)->SetEventCallbacks(jvmti, &callbacks,
- sizeof(jvmtiEventCallbacks)),
- " Set Event Callbacks")) {
- JNI_ENV_PTR(env)->FatalError(JNI_ENV_ARG2(env, "Cannot reset the callback."));
- }
-}
-
-#ifdef __cplusplus
-}
-#endif
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/serviceability/jvmti/HeapMonitor/libHeapMonitorTest.cpp Thu Mar 14 09:35:45 2019 -0700
@@ -0,0 +1,1165 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, Google 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 <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "jvmti.h"
+
+extern "C" {
+
+#define TRUE 1
+#define FALSE 0
+#define PRINT_OUT 0
+
+static jvmtiEnv *jvmti = NULL;
+static jvmtiEnv *second_jvmti = NULL;
+
+typedef struct _ObjectTrace{
+ jweak object;
+ jlong size;
+ jvmtiFrameInfo* frames;
+ size_t frame_count;
+ jthread thread;
+} ObjectTrace;
+
+typedef struct _EventStorage {
+ int live_object_additions;
+ int live_object_size;
+ int live_object_count;
+ ObjectTrace** live_objects;
+
+ int garbage_history_size;
+ int garbage_history_index;
+ ObjectTrace** garbage_collected_objects;
+
+ // Two separate monitors to separate storage data race and the compaction field
+ // data race.
+ jrawMonitorID storage_monitor;
+
+ int compaction_required;
+ jrawMonitorID compaction_monitor;
+} EventStorage;
+
+typedef struct _ExpectedContentFrame {
+ const char *name;
+ const char *signature;
+ const char *file_name;
+ int line_number;
+} ExpectedContentFrame;
+
+static
+void event_storage_lock(EventStorage* storage) {
+ jvmti->RawMonitorEnter(storage->storage_monitor);
+}
+
+static
+void event_storage_unlock(EventStorage* storage) {
+ jvmti->RawMonitorExit(storage->storage_monitor);
+}
+
+static
+void event_storage_lock_compaction(EventStorage* storage) {
+ jvmti->RawMonitorEnter(storage->compaction_monitor);
+}
+
+static
+void event_storage_unlock_compaction(EventStorage* storage) {
+ jvmti->RawMonitorExit(storage->compaction_monitor);
+}
+
+// Given a method and a location, this method gets the line number.
+static
+jint get_line_number(jmethodID method, jlocation location) {
+ // Read the line number table.
+ jvmtiLineNumberEntry *table_ptr = 0;
+ jint line_number_table_entries;
+ int l;
+ jlocation last_location;
+ int jvmti_error = jvmti->GetLineNumberTable(method,
+ &line_number_table_entries,
+ &table_ptr);
+
+ if (JVMTI_ERROR_NONE != jvmti_error) {
+ return -1;
+ }
+ if (line_number_table_entries <= 0) {
+ return -1;
+ }
+ if (line_number_table_entries == 1) {
+ return table_ptr[0].line_number;
+ }
+
+ // Go through all the line numbers...
+ last_location = table_ptr[0].start_location;
+ for (l = 1; l < line_number_table_entries; l++) {
+ // ... and if you see one that is in the right place for your
+ // location, you've found the line number!
+ if ((location < table_ptr[l].start_location) &&
+ (location >= last_location)) {
+ return table_ptr[l - 1].line_number;
+ }
+ last_location = table_ptr[l].start_location;
+ }
+
+ if (location >= last_location) {
+ return table_ptr[line_number_table_entries - 1].line_number;
+ } else {
+ return -1;
+ }
+}
+
+static void print_out_frames(JNIEnv* env, ObjectTrace* trace) {
+ jvmtiFrameInfo* frames = trace->frames;
+ size_t i;
+ for (i = 0; i < trace->frame_count; i++) {
+ // Get basic information out of the trace.
+ jlocation bci = frames[i].location;
+ jmethodID methodid = frames[i].method;
+ char *name = NULL, *signature = NULL, *file_name = NULL;
+ jclass declaring_class;
+ int line_number;
+ jvmtiError err;
+
+ if (bci < 0) {
+ fprintf(stderr, "\tNative frame\n");
+ continue;
+ }
+
+ // Transform into usable information.
+ line_number = get_line_number(methodid, bci);
+ if (JVMTI_ERROR_NONE != jvmti->GetMethodName(methodid, &name, &signature, 0)) {
+ fprintf(stderr, "\tUnknown method name\n");
+ continue;
+ }
+
+ if (JVMTI_ERROR_NONE != jvmti->GetMethodDeclaringClass(methodid, &declaring_class)) {
+ fprintf(stderr, "\tUnknown class\n");
+ continue;
+ }
+
+ err = jvmti->GetSourceFileName(declaring_class, &file_name);
+ if (err != JVMTI_ERROR_NONE) {
+ fprintf(stderr, "\tUnknown file\n");
+ continue;
+ }
+
+ // Compare now, none should be NULL.
+ if (name == NULL) {
+ fprintf(stderr, "\tUnknown name\n");
+ continue;
+ }
+
+ if (file_name == NULL) {
+ fprintf(stderr, "\tUnknown file\n");
+ continue;
+ }
+
+ if (signature == NULL) {
+ fprintf(stderr, "\tUnknown signature\n");
+ continue;
+ }
+
+ fprintf(stderr, "\t%s%s (%s: %d)\n", name, signature, file_name, line_number);
+ }
+}
+
+static jboolean check_sample_content(JNIEnv* env,
+ ObjectTrace* trace,
+ ExpectedContentFrame *expected,
+ size_t expected_count,
+ jboolean check_lines,
+ int print_out_comparisons) {
+ jvmtiFrameInfo* frames;
+ size_t i;
+
+ if (expected_count > trace->frame_count) {
+ return FALSE;
+ }
+
+ frames = trace->frames;
+ for (i = 0; i < expected_count; i++) {
+ // Get basic information out of the trace.
+ jlocation bci = frames[i].location;
+ jmethodID methodid = frames[i].method;
+ char *name = NULL, *signature = NULL, *file_name = NULL;
+ jclass declaring_class;
+ int line_number;
+ jboolean differ;
+ jvmtiError err;
+
+ if (bci < 0 && expected[i].line_number != -1) {
+ return FALSE;
+ }
+
+ // Transform into usable information.
+ line_number = get_line_number(methodid, bci);
+ jvmti->GetMethodName(methodid, &name, &signature, 0);
+
+ if (JVMTI_ERROR_NONE != jvmti->GetMethodDeclaringClass(methodid, &declaring_class)) {
+ return FALSE;
+ }
+
+ err = jvmti->GetSourceFileName(declaring_class, &file_name);
+ if (err != JVMTI_ERROR_NONE) {
+ return FALSE;
+ }
+
+ // Compare now, none should be NULL.
+ if (name == NULL) {
+ return FALSE;
+ }
+
+ if (file_name == NULL) {
+ return FALSE;
+ }
+
+ if (signature == NULL) {
+ return FALSE;
+ }
+
+ differ = (strcmp(name, expected[i].name) ||
+ strcmp(signature, expected[i].signature) ||
+ strcmp(file_name, expected[i].file_name) ||
+ (check_lines && line_number != expected[i].line_number));
+
+ if (print_out_comparisons) {
+ fprintf(stderr, "\tComparing: (check_lines: %d)\n", check_lines);
+ fprintf(stderr, "\t\tNames: %s and %s\n", name, expected[i].name);
+ fprintf(stderr, "\t\tSignatures: %s and %s\n", signature, expected[i].signature);
+ fprintf(stderr, "\t\tFile name: %s and %s\n", file_name, expected[i].file_name);
+ fprintf(stderr, "\t\tLines: %d and %d\n", line_number, expected[i].line_number);
+ fprintf(stderr, "\t\tResult is %d\n", differ);
+ }
+
+ if (differ) {
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
+// Static native API for various tests.
+static int fill_native_frames(JNIEnv* env, jobjectArray frames,
+ ExpectedContentFrame* native_frames, size_t size) {
+ size_t i;
+ for (i = 0; i < size; i++) {
+ jclass frame_class = NULL;
+ jfieldID line_number_field_id = 0;
+ int line_number = 0;
+ jfieldID string_id = 0;
+ jstring string_object = NULL;
+ const char* method = NULL;
+ const char* file_name = NULL;
+ const char* signature = NULL;
+
+ jobject obj = env->GetObjectArrayElement(frames, (jsize) i);
+
+ if (env->ExceptionOccurred()) {
+ fprintf(stderr, "fill_native_frames: Exception in jni GetObjectArrayElement\n");
+ return -1;
+ }
+
+ frame_class = env->GetObjectClass(obj);
+
+ if (env->ExceptionOccurred()) {
+ fprintf(stderr, "fill_native_frames: Exception in jni GetObjectClass\n");
+ return -1;
+ }
+
+ line_number_field_id = env->GetFieldID(frame_class, "lineNumber", "I");
+
+ if (env->ExceptionOccurred()) {
+ fprintf(stderr, "fill_native_frames: Exception in jni GetFieldID\n");
+ return -1;
+ }
+
+ line_number = env->GetIntField(obj, line_number_field_id);
+
+ if (env->ExceptionOccurred()) {
+ fprintf(stderr, "fill_native_frames: Exception in jni GetIntField\n");
+ return -1;
+ }
+
+ string_id = env->GetFieldID(frame_class, "method", "Ljava/lang/String;");
+
+ if (env->ExceptionOccurred()) {
+ fprintf(stderr, "fill_native_frames: Exception in jni GetFieldID\n");
+ return -1;
+ }
+
+ string_object = (jstring) env->GetObjectField(obj, string_id);
+
+ if (env->ExceptionOccurred()) {
+ fprintf(stderr, "fill_native_frames: Exception in jni GetObjectField\n");
+ return -1;
+ }
+
+ method = env->GetStringUTFChars(string_object, 0);
+
+ if (env->ExceptionOccurred()) {
+ fprintf(stderr, "Exception in jni GetStringUTFChars\n");
+ return -1;
+ }
+
+ string_id = env->GetFieldID(frame_class, "fileName", "Ljava/lang/String;");
+
+ if (env->ExceptionOccurred()) {
+ fprintf(stderr, "Exception in jni GetFieldID\n");
+ return -1;
+ }
+
+ string_object = (jstring) (env->GetObjectField(obj, string_id));
+
+ if (env->ExceptionOccurred()) {
+ fprintf(stderr, "fill_native_frames: Exception in second jni GetObjectField\n");
+ return -1;
+ }
+
+ file_name = env->GetStringUTFChars(string_object, 0);
+
+ if (env->ExceptionOccurred()) {
+ fprintf(stderr, "fill_native_frames: Exception in jni GetStringUTFChars\n");
+ return -1;
+ }
+
+ string_id = env->GetFieldID(frame_class, "signature", "Ljava/lang/String;");
+
+ if (env->ExceptionOccurred()) {
+ fprintf(stderr, "fill_native_frames: Exception in second jni GetFieldID\n");
+ return -1;
+ }
+
+ string_object = (jstring) (env->GetObjectField(obj, string_id));
+
+ if (env->ExceptionOccurred()) {
+ fprintf(stderr, "fill_native_frames: Exception in third jni GetObjectField\n");
+ return -1;
+ }
+
+ signature = env->GetStringUTFChars(string_object, 0);
+
+ if (env->ExceptionOccurred()) {
+ fprintf(stderr, "fill_native_frames: Exception in jni GetStringUTFChars\n");
+ return -1;
+ }
+
+ native_frames[i].name = method;
+ native_frames[i].file_name = file_name;
+ native_frames[i].signature = signature;
+ native_frames[i].line_number = line_number;
+ }
+
+ return 0;
+}
+
+// Internal storage system implementation.
+static EventStorage global_event_storage;
+static EventStorage second_global_event_storage;
+
+static void event_storage_set_compaction_required(EventStorage* storage) {
+ event_storage_lock_compaction(storage);
+ storage->compaction_required = 1;
+ event_storage_unlock_compaction(storage);
+}
+
+static int event_storage_get_compaction_required(EventStorage* storage) {
+ int result;
+ event_storage_lock_compaction(storage);
+ result = storage->compaction_required;
+ event_storage_unlock_compaction(storage);
+ return result;
+}
+
+static void event_storage_set_garbage_history(EventStorage* storage, int value) {
+ size_t size;
+ event_storage_lock(storage);
+ global_event_storage.garbage_history_size = value;
+ free(global_event_storage.garbage_collected_objects);
+ size = sizeof(*global_event_storage.garbage_collected_objects) * value;
+ global_event_storage.garbage_collected_objects = reinterpret_cast<ObjectTrace**>(malloc(size));
+ memset(global_event_storage.garbage_collected_objects, 0, size);
+ event_storage_unlock(storage);
+}
+
+// No mutex here, it is handled by the caller.
+static void event_storage_add_garbage_collected_object(EventStorage* storage,
+ ObjectTrace* object) {
+ int idx = storage->garbage_history_index;
+ ObjectTrace* old_object = storage->garbage_collected_objects[idx];
+ if (old_object != NULL) {
+ free(old_object->frames);
+ free(storage->garbage_collected_objects[idx]);
+ }
+
+ storage->garbage_collected_objects[idx] = object;
+ storage->garbage_history_index = (idx + 1) % storage->garbage_history_size;
+}
+
+static int event_storage_get_count(EventStorage* storage) {
+ int result;
+ event_storage_lock(storage);
+ result = storage->live_object_count;
+ event_storage_unlock(storage);
+ return result;
+}
+
+static double event_storage_get_average_size(EventStorage* storage) {
+ double accumulation = 0;
+ int max_size;
+ int i;
+
+ event_storage_lock(storage);
+ max_size = storage->live_object_count;
+
+ for (i = 0; i < max_size; i++) {
+ accumulation += storage->live_objects[i]->size;
+ }
+
+ event_storage_unlock(storage);
+ return accumulation / max_size;
+}
+
+static jboolean event_storage_contains(JNIEnv* env,
+ EventStorage* storage,
+ ExpectedContentFrame* frames,
+ size_t size,
+ jboolean check_lines) {
+ int i;
+ event_storage_lock(storage);
+ fprintf(stderr, "Checking storage count %d\n", storage->live_object_count);
+ for (i = 0; i < storage->live_object_count; i++) {
+ ObjectTrace* trace = storage->live_objects[i];
+
+ if (check_sample_content(env, trace, frames, size, check_lines, PRINT_OUT)) {
+ event_storage_unlock(storage);
+ return TRUE;
+ }
+ }
+ event_storage_unlock(storage);
+ return FALSE;
+}
+
+static jlong event_storage_get_size(JNIEnv* env,
+ EventStorage* storage,
+ ExpectedContentFrame* frames,
+ size_t size,
+ jboolean check_lines) {
+ int i;
+ event_storage_lock(storage);
+ fprintf(stderr, "Getting element from storage count, size %d\n", storage->live_object_count);
+ for (i = 0; i < storage->live_object_count; i++) {
+ ObjectTrace* trace = storage->live_objects[i];
+
+ if (check_sample_content(env, trace, frames, size, check_lines, PRINT_OUT)) {
+ jlong result = trace->size;
+ event_storage_unlock(storage);
+ return result;
+ }
+ }
+ event_storage_unlock(storage);
+ return 0;
+}
+
+static jboolean event_storage_garbage_contains(JNIEnv* env,
+ EventStorage* storage,
+ ExpectedContentFrame* frames,
+ size_t size,
+ jboolean check_lines) {
+ int i;
+ event_storage_lock(storage);
+ fprintf(stderr, "Checking garbage storage count %d\n",
+ storage->garbage_history_size);
+ for (i = 0; i < storage->garbage_history_size; i++) {
+ ObjectTrace* trace = storage->garbage_collected_objects[i];
+
+ if (trace == NULL) {
+ continue;
+ }
+
+ if (check_sample_content(env, trace, frames, size, check_lines, PRINT_OUT)) {
+ event_storage_unlock(storage);
+ return TRUE;
+ }
+ }
+ event_storage_unlock(storage);
+ return FALSE;
+}
+
+// No mutex here, handled by the caller.
+static void event_storage_augment_storage(EventStorage* storage) {
+ int new_max = (storage->live_object_size * 2) + 1;
+ ObjectTrace** new_objects = reinterpret_cast<ObjectTrace**>(malloc(new_max * sizeof(*new_objects)));
+
+ int current_count = storage->live_object_count;
+ memcpy(new_objects, storage->live_objects, current_count * sizeof(*new_objects));
+ free(storage->live_objects);
+ storage->live_objects = new_objects;
+ storage->live_object_size = new_max;
+}
+
+static void event_storage_add(EventStorage* storage,
+ JNIEnv* jni,
+ jthread thread,
+ jobject object,
+ jclass klass,
+ jlong size) {
+ jvmtiFrameInfo frames[64];
+ jint count;
+ jvmtiError err;
+
+ err = jvmti->GetStackTrace(thread, 0, 64, frames, &count);
+ if (err == JVMTI_ERROR_NONE && count >= 1) {
+ ObjectTrace* live_object;
+ jvmtiFrameInfo* allocated_frames = (jvmtiFrameInfo*) malloc(count * sizeof(*allocated_frames));
+ memcpy(allocated_frames, frames, count * sizeof(*allocated_frames));
+
+ live_object = (ObjectTrace*) malloc(sizeof(*live_object));
+ live_object->frames = allocated_frames;
+ live_object->frame_count = count;
+ live_object->size = size;
+ live_object->thread = thread;
+ live_object->object = jni->NewWeakGlobalRef(object);
+
+ if (jni->ExceptionOccurred()) {
+ jni->FatalError("Error in event_storage_add: Exception in jni NewWeakGlobalRef");
+ }
+
+ // Only now lock and get things done quickly.
+ event_storage_lock(storage);
+
+ storage->live_object_additions++;
+
+ if (storage->live_object_count >= storage->live_object_size) {
+ event_storage_augment_storage(storage);
+ }
+ assert(storage->live_object_count < storage->live_object_size);
+
+ if (PRINT_OUT) {
+ fprintf(stderr, "Adding trace for thread %p, frame_count %d, storage %p\n",
+ thread, count, storage);
+ print_out_frames(jni, live_object);
+ }
+ storage->live_objects[storage->live_object_count] = live_object;
+ storage->live_object_count++;
+
+ event_storage_unlock(storage);
+ }
+}
+
+static void event_storage_compact(EventStorage* storage, JNIEnv* jni) {
+ int max, i, dest;
+ ObjectTrace** live_objects;
+
+ event_storage_lock_compaction(storage);
+ storage->compaction_required = 0;
+ event_storage_unlock_compaction(storage);
+
+ event_storage_lock(storage);
+
+ max = storage->live_object_count;
+ live_objects = storage->live_objects;
+
+ for (i = 0, dest = 0; i < max; i++) {
+ ObjectTrace* live_object = live_objects[i];
+ jweak object = live_object->object;
+
+ if (!jni->IsSameObject(object, NULL)) {
+ if (dest != i) {
+ live_objects[dest] = live_object;
+ dest++;
+ }
+ } else {
+ jni->DeleteWeakGlobalRef(object);
+ live_object->object = NULL;
+
+ event_storage_add_garbage_collected_object(storage, live_object);
+ }
+ }
+
+ storage->live_object_count = dest;
+ event_storage_unlock(storage);
+}
+
+static void event_storage_free_objects(ObjectTrace** array, int max) {
+ int i;
+ for (i = 0; i < max; i++) {
+ free(array[i]), array[i] = NULL;
+ }
+}
+
+static void event_storage_reset(EventStorage* storage) {
+ event_storage_lock(storage);
+
+ // Reset everything except the mutex and the garbage collection.
+ event_storage_free_objects(storage->live_objects,
+ storage->live_object_count);
+ storage->live_object_additions = 0;
+ storage->live_object_size = 0;
+ storage->live_object_count = 0;
+ free(storage->live_objects), storage->live_objects = NULL;
+
+ event_storage_free_objects(storage->garbage_collected_objects,
+ storage->garbage_history_size);
+
+ storage->compaction_required = 0;
+ storage->garbage_history_index = 0;
+
+ event_storage_unlock(storage);
+}
+
+static int event_storage_number_additions(EventStorage* storage) {
+ int result;
+ event_storage_lock(storage);
+ result = storage->live_object_additions;
+ event_storage_unlock(storage);
+ return result;
+}
+
+// Start of the JVMTI agent code.
+static const char *EXC_CNAME = "java/lang/Exception";
+
+static int check_error(jvmtiError err, const char *s) {
+ if (err != JVMTI_ERROR_NONE) {
+ printf(" ## %s error: %d\n", s, err);
+ return 1;
+ }
+ return 0;
+}
+
+static int check_capability_error(jvmtiError err, const char *s) {
+ if (err != JVMTI_ERROR_NONE) {
+ if (err == JVMTI_ERROR_MUST_POSSESS_CAPABILITY) {
+ return 0;
+ }
+ fprintf(stderr, " ## %s error: %d\n", s, err);
+ }
+ return 1;
+}
+
+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_1_8;
+}
+
+#define MAX_THREADS 500
+
+typedef struct ThreadStats {
+ int thread_count;
+ int counts[MAX_THREADS];
+ char* threads[MAX_THREADS];
+} ThreadStats;
+
+static ThreadStats thread_stats;
+
+JNIEXPORT jboolean JNICALL
+Java_MyPackage_HeapMonitorThreadDisabledTest_checkThreadSamplesOnlyFrom(
+ JNIEnv* env, jclass cls, jthread thread) {
+ jvmtiThreadInfo info;
+ jvmtiError err;
+ char* expected_name;
+ int found_thread = FALSE;
+
+ err = jvmti->GetThreadInfo(thread, &info);
+ expected_name = info.name;
+
+ if (err != JVMTI_ERROR_NONE) {
+ fprintf(stderr, "Failed to get thread information\n");
+ return FALSE;
+ }
+
+ if (thread_stats.thread_count != 1) {
+ fprintf(stderr, "Wrong thread number: %d (expected 1)\n",
+ thread_stats.thread_count);
+ return FALSE;
+ }
+
+ if (strcmp(expected_name, thread_stats.threads[0]) != 0) {
+ fprintf(stderr, "Unexpected thread name: '%s' (expected '%s')\n",
+ thread_stats.threads[0], expected_name);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+static void add_thread_count(jthread thread) {
+ int i;
+ jvmtiThreadInfo info;
+ jvmtiError err;
+
+ err = jvmti->GetThreadInfo(thread, &info);
+ if (err != JVMTI_ERROR_NONE) {
+ fprintf(stderr, "Thread info for %p failed, ignoring thread count\n",
+ thread);
+ return;
+ }
+
+ event_storage_lock(&global_event_storage);
+ for (i = 0; i < thread_stats.thread_count; i++) {
+ if (!strcmp(thread_stats.threads[i], info.name)) {
+ thread_stats.counts[i]++;
+ event_storage_unlock(&global_event_storage);
+ return;
+ }
+ }
+
+ thread_stats.threads[thread_stats.thread_count] = info.name;
+ thread_stats.counts[thread_stats.thread_count]++;
+ thread_stats.thread_count++;
+ event_storage_unlock(&global_event_storage);
+}
+
+JNIEXPORT void JNICALL
+Java_MyPackage_HeapMonitorThreadDisabledTest_enableSamplingEvents(
+ JNIEnv* env, jclass cls, jthread thread) {
+ fprintf(stderr, "Enabling for %p\n", thread);
+ check_error(jvmti->SetEventNotificationMode(
+ JVMTI_ENABLE, JVMTI_EVENT_SAMPLED_OBJECT_ALLOC, thread),
+ "Set event notifications for a single thread");
+}
+
+static void print_thread_stats() {
+ int i;
+ event_storage_lock(&global_event_storage);
+ fprintf(stderr, "Thread count:\n");
+ for (i = 0; i < thread_stats.thread_count; i++) {
+ fprintf(stderr, "\t%s: %d\n", thread_stats.threads[i], thread_stats.counts[i]);
+ }
+ event_storage_unlock(&global_event_storage);
+}
+
+JNIEXPORT
+void JNICALL SampledObjectAlloc(jvmtiEnv *jvmti_env,
+ JNIEnv* jni_env,
+ jthread thread,
+ jobject object,
+ jclass object_klass,
+ jlong size) {
+ add_thread_count(thread);
+
+ if (event_storage_get_compaction_required(&global_event_storage)) {
+ event_storage_compact(&global_event_storage, jni_env);
+ }
+
+ event_storage_add(&global_event_storage, jni_env, thread, object,
+ object_klass, size);
+}
+
+JNIEXPORT
+void JNICALL VMObjectAlloc(jvmtiEnv *jvmti_env,
+ JNIEnv* jni_env,
+ jthread thread,
+ jobject object,
+ jclass object_klass,
+ jlong size) {
+ event_storage_add(&second_global_event_storage, jni_env, thread, object,
+ object_klass, size);
+}
+
+JNIEXPORT
+void JNICALL GarbageCollectionFinish(jvmtiEnv *jvmti_env) {
+ event_storage_set_compaction_required(&global_event_storage);
+}
+
+static int enable_notifications() {
+ if (check_error(jvmti->SetEventNotificationMode(
+ JVMTI_ENABLE, JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, NULL),
+ "Set event notifications")) {
+ return 1;
+ }
+
+ return check_error(jvmti->SetEventNotificationMode(
+ JVMTI_ENABLE, JVMTI_EVENT_SAMPLED_OBJECT_ALLOC, NULL),
+ "Set event notifications");
+}
+
+static
+jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
+ jint res;
+ jvmtiEventCallbacks callbacks;
+ jvmtiCapabilities caps;
+
+ res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION);
+ if (res != JNI_OK || jvmti == NULL) {
+ fprintf(stderr, "Error: wrong result of a valid call to GetEnv!\n");
+ return JNI_ERR;
+ }
+
+ // Get second jvmti environment.
+ res = jvm->GetEnv((void **) &second_jvmti, JVMTI_VERSION);
+ if (res != JNI_OK || second_jvmti == NULL) {
+ fprintf(stderr, "Error: wrong result of a valid second call to GetEnv!\n");
+ return JNI_ERR;
+ }
+
+ if (PRINT_OUT) {
+ fprintf(stderr, "Storage is at %p, secondary is at %p\n",
+ &global_event_storage, &second_global_event_storage);
+ }
+
+ jvmti->CreateRawMonitor("storage_monitor",
+ &global_event_storage.storage_monitor);
+ jvmti->CreateRawMonitor("second_storage_monitor",
+ &second_global_event_storage.storage_monitor);
+
+ jvmti->CreateRawMonitor("compaction_monitor",
+ &global_event_storage.compaction_monitor);
+ jvmti->CreateRawMonitor("second_compaction_monitor",
+ &second_global_event_storage.compaction_monitor);
+
+ event_storage_set_garbage_history(&global_event_storage, 200);
+ event_storage_set_garbage_history(&second_global_event_storage, 200);
+
+ memset(&callbacks, 0, sizeof(callbacks));
+ callbacks.SampledObjectAlloc = &SampledObjectAlloc;
+ callbacks.VMObjectAlloc = &VMObjectAlloc;
+ callbacks.GarbageCollectionFinish = &GarbageCollectionFinish;
+
+ memset(&caps, 0, sizeof(caps));
+ // Get line numbers, sample events, filename, and gc events for the tests.
+ caps.can_get_line_numbers = 1;
+ caps.can_get_source_file_name = 1;
+ caps.can_generate_garbage_collection_events = 1;
+ caps.can_generate_sampled_object_alloc_events = 1;
+ caps.can_generate_vm_object_alloc_events = 1;
+ if (check_error(jvmti->AddCapabilities(&caps), "Add capabilities")) {
+ return JNI_ERR;
+ }
+
+ if (check_error(jvmti->SetEventCallbacks(&callbacks,
+ sizeof(jvmtiEventCallbacks)),
+ " Set Event Callbacks")) {
+ return JNI_ERR;
+ }
+ return JNI_OK;
+}
+
+JNIEXPORT void JNICALL
+Java_MyPackage_HeapMonitor_setSamplingInterval(JNIEnv* env, jclass cls, jint value) {
+ jvmti->SetHeapSamplingInterval(value);
+}
+
+JNIEXPORT jboolean JNICALL
+Java_MyPackage_HeapMonitor_eventStorageIsEmpty(JNIEnv* env, jclass cls) {
+ return event_storage_get_count(&global_event_storage) == 0;
+}
+
+JNIEXPORT jint JNICALL
+Java_MyPackage_HeapMonitor_getEventStorageElementCount(JNIEnv* env, jclass cls) {
+ return event_storage_get_count(&global_event_storage);
+}
+
+JNIEXPORT void JNICALL
+Java_MyPackage_HeapMonitor_enableSamplingEvents(JNIEnv* env, jclass cls) {
+ enable_notifications();
+}
+
+JNIEXPORT void JNICALL
+Java_MyPackage_HeapMonitor_disableSamplingEvents(JNIEnv* env, jclass cls) {
+ check_error(jvmti->SetEventNotificationMode(
+ JVMTI_DISABLE, JVMTI_EVENT_SAMPLED_OBJECT_ALLOC, NULL),
+ "Set event notifications");
+
+ check_error(jvmti->SetEventNotificationMode(
+ JVMTI_DISABLE, JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, NULL),
+ "Garbage Collection Finish");
+}
+
+static ExpectedContentFrame *get_native_frames(JNIEnv* env, jclass cls,
+ jobjectArray frames) {
+ ExpectedContentFrame *native_frames;
+ jsize size = env->GetArrayLength(frames);
+
+ if (env->ExceptionOccurred()) {
+ env->FatalError("get_native_frames failed with the GetArrayLength call");
+ }
+
+ native_frames = reinterpret_cast<ExpectedContentFrame*> (malloc(size * sizeof(*native_frames)));
+
+ if (native_frames == NULL) {
+ env->FatalError("Error in get_native_frames: malloc returned NULL\n");
+ }
+
+ if (fill_native_frames(env, frames, native_frames, size) != 0) {
+ env->FatalError("Error in get_native_frames: fill_native_frames returned failed status\n");
+ }
+
+ return native_frames;
+}
+
+JNIEXPORT jboolean JNICALL
+Java_MyPackage_HeapMonitor_obtainedEvents(JNIEnv* env, jclass cls,
+ jobjectArray frames,
+ jboolean check_lines) {
+ jboolean result;
+ jsize size = env->GetArrayLength(frames);
+ ExpectedContentFrame *native_frames = get_native_frames(env, cls, frames);
+
+ result = event_storage_contains(env, &global_event_storage, native_frames,
+ size, check_lines);
+
+ free(native_frames), native_frames = NULL;
+ return result;
+}
+
+JNIEXPORT jboolean JNICALL
+Java_MyPackage_HeapMonitor_garbageContains(JNIEnv* env, jclass cls,
+ jobjectArray frames,
+ jboolean check_lines) {
+ jboolean result;
+ jsize size = env->GetArrayLength(frames);
+ ExpectedContentFrame *native_frames = get_native_frames(env, cls, frames);
+
+ result = event_storage_garbage_contains(env, &global_event_storage,
+ native_frames, size, check_lines);
+
+ free(native_frames), native_frames = NULL;
+ return result;
+}
+
+JNIEXPORT jlong JNICALL
+Java_MyPackage_HeapMonitor_getSize(JNIEnv* env, jclass cls,
+ jobjectArray frames,
+ jboolean check_lines) {
+ jlong result = 0;
+ jsize size = env->GetArrayLength(frames);
+ ExpectedContentFrame *native_frames = get_native_frames(env, cls, frames);
+
+ result = event_storage_get_size(env, &global_event_storage,
+ native_frames, size, check_lines);
+
+ free(native_frames), native_frames = NULL;
+ return result;
+}
+
+JNIEXPORT void JNICALL
+Java_MyPackage_HeapMonitor_forceGarbageCollection(JNIEnv* env, jclass cls) {
+ check_error(jvmti->ForceGarbageCollection(),
+ "Forced Garbage Collection");
+}
+
+JNIEXPORT void JNICALL
+Java_MyPackage_HeapMonitor_resetEventStorage(JNIEnv* env, jclass cls) {
+ event_storage_reset(&global_event_storage);
+ event_storage_reset(&second_global_event_storage);
+}
+
+JNIEXPORT jboolean JNICALL
+Java_MyPackage_HeapMonitorNoCapabilityTest_allSamplingMethodsFail(JNIEnv *env,
+ jclass cls) {
+ jvmtiCapabilities caps;
+ memset(&caps, 0, sizeof(caps));
+ caps.can_generate_sampled_object_alloc_events = 1;
+ if (check_error(jvmti->RelinquishCapabilities(&caps),
+ "Add capabilities\n")){
+ return FALSE;
+ }
+
+ if (check_capability_error(jvmti->SetHeapSamplingInterval(1<<19),
+ "Set Heap Sampling Interval")) {
+ return FALSE;
+ }
+ return TRUE;
+}
+
+JNIEXPORT jboolean JNICALL
+Java_MyPackage_HeapMonitorIllegalArgumentTest_testIllegalArgument(JNIEnv *env,
+ jclass cls) {
+ if (check_error(jvmti->SetHeapSamplingInterval(0),
+ "Sampling interval 0 failed\n")){
+ return FALSE;
+ }
+
+ if (check_error(jvmti->SetHeapSamplingInterval(1024),
+ "Sampling interval 1024 failed\n")){
+ return FALSE;
+ }
+
+ if (!check_error(jvmti->SetHeapSamplingInterval(-1),
+ "Sampling interval -1 passed\n")){
+ return FALSE;
+ }
+
+ if (!check_error(jvmti->SetHeapSamplingInterval(-1024),
+ "Sampling interval -1024 passed\n")){
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+JNIEXPORT jdouble JNICALL
+Java_MyPackage_HeapMonitor_getAverageSize(JNIEnv *env, jclass cls) {
+ return event_storage_get_average_size(&global_event_storage);
+}
+
+typedef struct sThreadsFound {
+ jthread* threads;
+ int num_threads;
+} ThreadsFound;
+
+JNIEXPORT jboolean JNICALL
+Java_MyPackage_HeapMonitorThreadTest_checkSamples(JNIEnv* env, jclass cls,
+ jint num_threads) {
+ print_thread_stats();
+ // Ensure we got stacks from at least num_threads.
+ return thread_stats.thread_count >= num_threads;
+}
+
+JNIEXPORT
+void JNICALL SampledObjectAlloc2(jvmtiEnv *jvmti_env,
+ JNIEnv* jni_env,
+ jthread thread,
+ jobject object,
+ jclass object_klass,
+ jlong size) {
+ // Nop for now, two agents are not yet implemented.
+ assert(0);
+}
+
+JNIEXPORT jboolean JNICALL
+Java_MyPackage_HeapMonitorTwoAgentsTest_enablingSamplingInSecondaryAgent(
+ JNIEnv* env, jclass cls) {
+ // Currently this method should be failing directly at the AddCapability step
+ // but the implementation is correct for when multi-agent support is enabled.
+ jvmtiCapabilities caps;
+ jvmtiEventCallbacks callbacks;
+
+ memset(&caps, 0, sizeof(caps));
+ caps.can_generate_sampled_object_alloc_events = 1;
+ if (check_error(second_jvmti->AddCapabilities(&caps),
+ "Set the capability for second agent")) {
+ return FALSE;
+ }
+
+ memset(&callbacks, 0, sizeof(callbacks));
+ callbacks.SampledObjectAlloc = &SampledObjectAlloc2;
+
+ if (check_error(second_jvmti->SetEventCallbacks(&callbacks,
+ sizeof(jvmtiEventCallbacks)),
+ " Set Event Callbacks for second agent")) {
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+JNIEXPORT void JNICALL
+Java_MyPackage_HeapMonitor_enableVMEvents(JNIEnv* env, jclass cls) {
+ check_error(jvmti->SetEventNotificationMode(
+ JVMTI_ENABLE, JVMTI_EVENT_VM_OBJECT_ALLOC, NULL),
+ "Set vm event notifications");
+}
+
+JNIEXPORT jint JNICALL
+Java_MyPackage_HeapMonitorVMEventsTest_vmEvents(JNIEnv* env, jclass cls) {
+ return event_storage_number_additions(&second_global_event_storage);
+}
+
+JNIEXPORT jint JNICALL
+Java_MyPackage_HeapMonitor_sampledEvents(JNIEnv* env, jclass cls) {
+ return event_storage_number_additions(&global_event_storage);
+}
+
+static jobject allocate_object(JNIEnv* env) {
+ // Construct an Object.
+ jclass cls = env->FindClass("java/lang/Object");
+ jmethodID constructor;
+ jobject result;
+
+ if (env->ExceptionOccurred() || cls == NULL) {
+ env->FatalError("Error in jni FindClass: Cannot find Object class\n");
+ }
+
+ constructor = env->GetMethodID(cls, "<init>", "()V");
+ if (env->ExceptionOccurred() || constructor == NULL) {
+ env->FatalError("Error in jni GetMethodID: Cannot find Object class constructor\n");
+ }
+
+ // Call back constructor to allocate a new instance, with an int argument
+ result = env->NewObject(cls, constructor);
+
+ if (env->ExceptionOccurred() || result == NULL) {
+ env->FatalError("Error in jni NewObject: Cannot allocate an object\n");
+ }
+ return result;
+}
+
+// Ensure we got a callback for the test.
+static int did_recursive_callback_test;
+
+JNIEXPORT
+void JNICALL RecursiveSampledObjectAlloc(jvmtiEnv *jvmti_env,
+ JNIEnv* jni_env,
+ jthread thread,
+ jobject object,
+ jclass object_klass,
+ jlong size) {
+ // Basically ensure that if we were to allocate objects, we would not have an
+ // infinite recursion here.
+ int i;
+ for (i = 0; i < 1000; i++) {
+ if (allocate_object(jni_env) == NULL) {
+ jni_env->FatalError("allocate_object returned NULL\n");
+ }
+ }
+
+ did_recursive_callback_test = 1;
+}
+
+JNIEXPORT jboolean JNICALL
+Java_MyPackage_HeapMonitorRecursiveTest_didCallback(JNIEnv* env, jclass cls) {
+ return did_recursive_callback_test != 0;
+}
+
+JNIEXPORT void JNICALL
+Java_MyPackage_HeapMonitorRecursiveTest_setCallbackToCallAllocateSomeMore(JNIEnv* env, jclass cls) {
+ jvmtiEventCallbacks callbacks;
+
+ memset(&callbacks, 0, sizeof(callbacks));
+ callbacks.SampledObjectAlloc = &RecursiveSampledObjectAlloc;
+
+ if (check_error(jvmti->SetEventCallbacks(&callbacks,
+ sizeof(jvmtiEventCallbacks)),
+ "Set Event Callbacks")) {
+ env->FatalError("Cannot reset the callback.");
+ }
+}
+
+}