feat: add a new tab for env variables in heapdump

analysis/heap-dump/api/src/main/java/org/eclipse/jifa/hda/api/HeapDumpAnalyzer.java

@@ -1,5 +1,5 @@
 /********************************************************************************
- * Copyright (c) 2021, 2023 Contributors to the Eclipse Foundation
+ * Copyright (c) 2021, 2023, 2024 Contributors to the Eclipse Foundation
  *
  * See the NOTICE file(s) distributed with this work for additional
  * information regarding copyright ownership.
@@ -34,6 +34,8 @@ public interface HeapDumpAnalyzer {
 
     Map<String, String> getSystemProperties();
 
+    Map<String, String> getEnvVariables();
+
     List<Overview.BigObject> getBiggestObjects();
 
     @ApiMeta(aliases = "object")

analysis/heap-dump/impl/src/main/java/org/eclipse/jifa/hda/impl/HeapDumpAnalyzerImpl.java

@@ -1,5 +1,5 @@
 /********************************************************************************
- * Copyright (c) 2021, 2023 Contributors to the Eclipse Foundation
+ * Copyright (c) 2021, 2023, 2024 Contributors to the Eclipse Foundation
  *
  * See the NOTICE file(s) distributed with this work for additional
  * information regarding copyright ownership.
@@ -72,17 +72,7 @@
 import java.lang.ref.SoftReference;
 import java.net.URL;
 import java.nio.file.Path;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.Comparator;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Optional;
-import java.util.Set;
-import java.util.StringTokenizer;
+import java.util.*;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.regex.Pattern;
@@ -271,6 +261,27 @@ public Map<String, String> getSystemProperties() {
         });
     }
 
+    @Override
+    public Map<String, String> getEnvVariables() {
+        return $(() -> {
+            Map<String, String> env = new HashMap<>();
+            Collection<IClass> classes = context.snapshot.getClassesByName("java.lang.ProcessEnvironment", true);
+            if(classes == null || classes.isEmpty()){
+                return env;
+            }
+            IClass systemClass = classes.iterator().next();
+            IObject iObject = (IObject) systemClass.resolveValue("theEnvironment");
+            IResultTable result = (IResultTable) SnapshotQuery.lookup("hash_entries", context.snapshot)
+                    .setArgument("objects", iObject).execute(new ProgressListenerImpl(NoOpProgressListener));
+            int rowCount = result.getRowCount();
+            for(int i = 0; i< rowCount; i++){
+                Object row = result.getRow(i);
+                env.put((String) result.getColumnValue(row, 1), (String) result.getColumnValue(row, 2));
+            }
+            return env;
+        });
+    }
+
     @Override
     public JavaObject getObjectInfo(int objectId) {
         return $(() -> {

frontend/src/components/heapdump/EnvVariables.vue

@@ -0,0 +1,85 @@
+<!--
+    Copyright (c) 2024 Contributors to the Eclipse Foundation
+
+    See the NOTICE file(s) distributed with this work for additional
+    information regarding copyright ownership.
+
+    This program and the accompanying materials are made available under the
+    terms of the Eclipse Public License 2.0 which is available at
+    http://www.eclipse.org/legal/epl-2.0
+
+    SPDX-License-Identifier: EPL-2.0
+ -->
+<script setup lang="ts">
+import CommonTable from '@/components/heapdump/CommonTable.vue';
+import { Search } from '@element-plus/icons-vue';
+import { hdt } from '@/components/heapdump/utils';
+import { t } from '@/i18n/i18n';
+
+const search = ref('');
+
+const tableProps = ref({
+  columns: [
+    {
+      label: () => hdt('column.key'),
+      width: '40%',
+      property: 'key'
+    },
+    {
+      label: () => hdt('column.value'),
+      width: '60%',
+      property: 'value'
+    }
+  ],
+
+  apis: [
+    {
+      api: 'envVariables',
+      respMapper: (d) => {
+        let result = [];
+        for (let key in d) {
+          result.push({
+            key,
+            value: d[key]
+          });
+        }
+        return result;
+      },
+      paged: false
+    }
+  ],
+
+  showOverflowTooltip: false,
+
+  dataFilter: (d) =>
+    !search.value ||
+    d.key.toLowerCase().includes(search.value.toLowerCase()) ||
+    d.value.toLowerCase().includes(search.value.toLowerCase())
+});
+</script>
+<template>
+  <div style="height: 100%; position: relative">
+    <div
+      style="
+        position: absolute;
+        right: 10px;
+        z-index: 10;
+        height: 32px;
+        flex-shrink: 0;
+        margin-bottom: 8px;
+        overflow: hidden;
+        display: flex;
+        align-items: center;
+      "
+    >
+      <el-input
+        v-model="search"
+        size="small"
+        style="width: 180px"
+        :placeholder="t('common.search')"
+        :suffix-icon="Search as any"
+      />
+    </div>
+    <CommonTable ref="table" v-bind="tableProps" />
+  </div>
+</template>

frontend/src/components/heapdump/HeapDump.vue

@@ -18,6 +18,7 @@ import DominatorTree from '@/components/heapdump/DominatorTree.vue';
 import Histogram from '@/components/heapdump/Histogram.vue';
 import Threads from '@/components/heapdump/Threads.vue';
 import SystemProperties from '@/components/heapdump/SystemProperties.vue';
+import EnvVariables from '@/components/heapdump/EnvVariables.vue';
 import Query from '@/components/heapdump/Query.vue';
 import GCRoots from '@/components/heapdump/GCRoots.vue';
 import UnreachableObjects from '@/components/heapdump/UnreachableObjects.vue';
@@ -56,7 +57,8 @@ const tabs = {
   DirectByteBuffers,
   DuplicateClasses,
   UnreachableObjects,
-  SystemProperties
+  SystemProperties,
+  EnvVariables
 };
 
 const width = useDebouncedRef(window.innerWidth);

frontend/src/i18n/heapdump/en.ts

@@ -1,5 +1,5 @@
 /********************************************************************************
- * Copyright (c) 2023 Contributors to the Eclipse Foundation
+ * Copyright (c) 2023, 2024 Contributors to the Eclipse Foundation
  *
  * See the NOTICE file(s) distributed with this work for additional
  * information regarding copyright ownership.
@@ -40,6 +40,7 @@ export default {
     threads: 'Threads',
     unreachableObjects: 'Unreachable Objects',
     systemProperties: 'System Properties',
+    envVariables: 'Environment Variables',
     directByteBuffers: 'Direct Byte Buffers',
     classLoaders: 'Class Loaders',
     duplicateClasses: 'Duplicated Classes',

frontend/src/i18n/heapdump/zh.ts

@@ -1,5 +1,5 @@
 /********************************************************************************
- * Copyright (c) 2023 Contributors to the Eclipse Foundation
+ * Copyright (c) 2023, 2024 Contributors to the Eclipse Foundation
  *
  * See the NOTICE file(s) distributed with this work for additional
  * information regarding copyright ownership.
@@ -40,6 +40,7 @@ export default {
     threads: '线程',
     unreachableObjects: '不可达对象',
     systemProperties: '系统属性',
+    envVariables: '环境变量',
     directByteBuffers: '堆外内存',
     classLoaders: '类加载器',
     duplicateClasses: '重复类',