support ognl strict. #2955

core/src/main/java/com/taobao/arthas/core/GlobalOptions.java

@@ -1,6 +1,11 @@
 package com.taobao.arthas.core;
 
+import java.lang.reflect.Field;
+
 import com.taobao.arthas.common.JavaVersionUtils;
+import com.taobao.arthas.common.UnsafeUtils;
+
+import ognl.OgnlRuntime;
 
 /**
  * 全局开关
@@ -128,7 +133,8 @@ public class GlobalOptions {
     public static volatile boolean verbose = false;
 
     /**
-     * 是否打开strict 开关
+     * 是否打开strict 开关。更新时注意 ognl 里的配置需要同步修改
+     * @see ognl.OgnlRuntime#getUseStricterInvocationValue()
      */
     @Option(level = 1,
             name = "strict",
@@ -136,4 +142,20 @@ public class GlobalOptions {
             description = STRICT_MESSAGE
     )
     public static volatile boolean strict = true;
+
+    public static void updateOnglStrict(boolean strict) {
+        try {
+            Field field = OgnlRuntime.class.getDeclaredField("_useStricterInvocation");
+            field.setAccessible(true);
+            // 获取字段的内存偏移量和基址
+            Object staticFieldBase = UnsafeUtils.UNSAFE.staticFieldBase(field);
+            long staticFieldOffset = UnsafeUtils.UNSAFE.staticFieldOffset(field);
+
+            // 修改字段的值
+            UnsafeUtils.UNSAFE.putBoolean(staticFieldBase, staticFieldOffset, strict);
+        } catch (NoSuchFieldException | SecurityException e) {
+            // ignore
+        }
+    }
+
 }

core/src/main/java/com/taobao/arthas/core/command/basic1000/OptionsCommand.java

@@ -155,6 +155,11 @@ public class OptionsCommand extends AnnotatedCommand {
                 return ExitStatus.failure(-1, format("Options[%s] type[%s] was unsupported.", optionName, type.getSimpleName()));
             }
 
+            // FIXME hack for ongl strict
+            if (field.getName().equals("strict")) {
+                GlobalOptions.updateOnglStrict(Boolean.valueOf(optionValue));
+                logger.info("update ongl strict to: {}", optionValue);
+            }
         } catch (Throwable t) {
             return ExitStatus.failure(-1, format("Cannot cast option value[%s] to type[%s].", optionValue, type.getSimpleName()));
         }

core/src/test/java/com/taobao/arthas/core/GlobalOptionsTest.java

@@ -0,0 +1,18 @@
+package com.taobao.arthas.core;
+
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import ognl.OgnlRuntime;
+
+class GlobalOptionsTest {
+
+    @Test
+    void test() {
+        GlobalOptions.updateOnglStrict(true);
+        Assertions.assertThat(OgnlRuntime.getUseStricterInvocationValue()).isTrue();
+        GlobalOptions.updateOnglStrict(false);
+        Assertions.assertThat(OgnlRuntime.getUseStricterInvocationValue()).isFalse();
+    }
+
+}