test native leak

baiiu · May 20, 2021 · 491bb3e · 491bb3e
1 parent a34c8f0
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diff --git a/jni/nativeleak/.gitignore b/jni/nativeleak/.gitignore
@@ -0,0 +1 @@
+/build
diff --git a/jni/nativeleak/build.gradle b/jni/nativeleak/build.gradle
@@ -0,0 +1,45 @@
+plugins {
+    id 'com.android.application'
+}
+
+android {
+    compileSdkVersion 30
+    buildToolsVersion "30.0.3"
+
+    defaultConfig {
+        applicationId "com.baiiu.nativeleak"
+        minSdkVersion 16
+        targetSdkVersion 30
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+    externalNativeBuild {
+        cmake {
+            path 'src/main/cpp/CMakeLists.txt'
+            version "3.6.0"
+        }
+    }
+}
+
+dependencies {
+
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'com.google.android.material:material:1.3.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    testImplementation 'junit:junit:4.+'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+}
diff --git a/jni/nativeleak/proguard-rules.pro b/jni/nativeleak/proguard-rules.pro
@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
diff --git a/jni/nativeleak/src/androidTest/java/com/baiiu/nativeleak/ExampleInstrumentedTest.java b/jni/nativeleak/src/androidTest/java/com/baiiu/nativeleak/ExampleInstrumentedTest.java
@@ -0,0 +1,26 @@
+package com.baiiu.nativeleak;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        assertEquals("com.baiiu.nativeleak", appContext.getPackageName());
+    }
+}
diff --git a/jni/nativeleak/src/main/AndroidManifest.xml b/jni/nativeleak/src/main/AndroidManifest.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.baiiu.nativeleak">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.AndroidModule">
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>
diff --git a/jni/nativeleak/src/main/cpp/CMakeLists.txt b/jni/nativeleak/src/main/cpp/CMakeLists.txt
@@ -0,0 +1,25 @@
+# For more information about using CMake with Android Studio, read the
+# documentation: https://d.android.com/studio/projects/add-native-code.html
+
+# Sets the minimum version of CMake required to build the native library.
+
+cmake_minimum_required(VERSION 3.4.1)
+
+# 添加动态库
+add_library(
+        test-lib
+
+        SHARED
+
+        testLeak.cpp
+)
+
+# 从某路径下找到动态库并命名
+find_library(
+        log-lib
+        log)
+
+# 关联动态库
+target_link_libraries(
+        test-lib
+        ${log-lib})
diff --git a/jni/nativeleak/src/main/cpp/native-lib.cpp b/jni/nativeleak/src/main/cpp/native-lib.cpp
@@ -0,0 +1,4 @@
+//
+// Created by baiiu on 2021/5/20.
+//
+
diff --git a/jni/nativeleak/src/main/cpp/testLeak.cpp b/jni/nativeleak/src/main/cpp/testLeak.cpp
@@ -0,0 +1,90 @@
+//
+// Created by baiiu on 2021/5/20.
+//
+
+#include <android/log.h>
+#include <malloc.h>
+#include "jni.h"
+#include "string.h"
+
+/*
+ *
+ *
+这段代码：
+char *p = (char *) malloc(sizeof(char) * 1024 * 1024);
+__android_log_print(ANDROID_LOG_DEBUG, "mLogU", "%p has leaked 1M", p);
+每次分配1M，当虚拟内存分配完后，返回指针为null；
+点Home键后，直接崩溃了；
+
+adb shell cat proc/27581/statm
+363265 25825 17479 5 0 38044 0
+624514 26183 17810 5 0 299292 0
+886658 26352 17953 5 0 561436 0
+1044866 26447 18021 5 0 719644 0
+1044866 26457 18037 5 0 719644 0
+1044866 26460 18037 5 0 719644 0
+通过proc/[pid]/statm查看，当虚拟内存全部分配后，第一列vmSize已经不再变化，因为没有引用该值，索引
+
+
+05-20 17:16:54.259 27435 27435 E AndroidRuntime: FATAL EXCEPTION: main
+05-20 17:16:54.259 27435 27435 E AndroidRuntime: Process: com.baiiu.nativeleak, PID: 27435
+05-20 17:16:54.259 27435 27435 E AndroidRuntime: java.lang.OutOfMemoryError: pthread_create (1040KB stack) failed: Try again
+05-20 17:16:54.259 27435 27435 E AndroidRuntime: 	at java.lang.Thread.nativeCreate(Native Method)
+05-20 17:16:54.259 27435 27435 E AndroidRuntime: 	at java.lang.Thread.start(Thread.java:733)
+05-20 17:16:54.259 27435 27435 E AndroidRuntime: 	at android.app.QueuedWork.getHandler(QueuedWork.java:104)
+05-20 17:16:54.259 27435 27435 E AndroidRuntime: 	at android.app.QueuedWork.waitToFinish(QueuedWork.java:153)
+05-20 17:16:54.259 27435 27435 E AndroidRuntime: 	at android.app.ActivityThread.handleStopActivity(ActivityThread.java:4207)
+05-20 17:16:54.259 27435 27435 E AndroidRuntime: 	at android.app.servertransaction.StopActivityItem.execute(StopActivityItem.java:41)
+05-20 17:16:54.259 27435 27435 E AndroidRuntime: 	at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:145)
+05-20 17:16:54.259 27435 27435 E AndroidRuntime: 	at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:70)
+05-20 17:16:54.259 27435 27435 E AndroidRuntime: 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
+05-20 17:16:54.259 27435 27435 E AndroidRuntime: 	at android.os.Handler.dispatchMessage(Handler.java:106)
+05-20 17:16:54.259 27435 27435 E AndroidRuntime: 	at android.os.Looper.loop(Looper.java:193)
+05-20 17:16:54.259 27435 27435 E AndroidRuntime: 	at android.app.ActivityThread.main(ActivityThread.java:6669)
+05-20 17:16:54.259 27435 27435 E AndroidRuntime: 	at java.lang.reflect.Method.invoke(Native Method)
+05-20 17:16:54.259 27435 27435 E AndroidRuntime: 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
+05-20 17:16:54.259 27435 27435 E AndroidRuntime: 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
+
+
+
+char *p = (char *) malloc(sizeof(char) * 1024 * 1024);
+char *s = "hello_world";
+strcpy(p, s);
+__android_log_print(ANDROID_LOG_DEBUG, "mLogU", "%p has leaked 1M", p);
+每次分配1M，当虚拟内存分配完后，返回指针为null；为null时调用strcpy因空指针崩溃
+当修复空指针问题后，按Home键崩溃时候日志和第一种一样
+
+generic_x86_arm:/ $ cat proc/27850/statm
+363265 25782 17421 5 0 38044 0
+624514 27164 17735 5 0 299292 0
+886786 28203 17741 5 0 561564 0
+
+
+05-20 17:46:57.373 27945 27945 F DEBUG   : Build fingerprint: 'google/sdk_gphone_x86_arm/generic_x86_arm:9/PSR1.180720.117/5875966:user/release-keys'
+05-20 17:46:57.373 27945 27945 F DEBUG   : Revision: '0'
+05-20 17:46:57.373 27945 27945 F DEBUG   : ABI: 'x86'
+05-20 17:46:57.373 27945 27945 F DEBUG   : pid: 27850, tid: 27850, name: aiiu.nativeleak  >>> com.baiiu.nativeleak <<<
+05-20 17:46:57.373 27945 27945 F DEBUG   : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0
+05-20 17:46:57.373 27945 27945 F DEBUG   : Cause: null pointer dereference
+05-20 17:46:57.373 27945 27945 F DEBUG   :     eax 00000000  ebx d9211fdc  ecx f349f2a0  edx 00646c72
+05-20 17:46:57.373 27945 27945 F DEBUG   :     edi 00000000  esi d9210652
+05-20 17:46:57.373 27945 27945 F DEBUG   :     ebp ff7fc328  esp ff7fc2c4  eip f349f2a7
+05-20 17:46:57.479 27945 27945 F DEBUG   :
+05-20 17:46:57.479 27945 27945 F DEBUG   : backtrace:
+05-20 17:46:57.479 27945 27945 F DEBUG   :     #00 pc 0001e2a7  /system/lib/libc.so (strcpy+1591)
+05-20 17:46:57.479 27945 27945 F DEBUG   :     #01 pc 00000619  /data/app/com.baiiu.nativeleak-wL45YswCp5R9mJtUY58XoQ==/lib/x86/libnative-lib.so (Java_com_baiiu_nativeleak_MainActivity_testLeak+137)
+
+由此可见虚拟内存使用完了造成的影响很大，无法mallcoc，正常业务无法运行；
+首先应当尽量避免内存泄露，然后看看能否使用64位so，增大虚拟内存寻址空间；
+ */
+
+extern "C"
+JNIEXPORT void JNICALL
+Java_com_baiiu_nativeleak_MainActivity_testLeak(JNIEnv *env, jobject thiz) {
+    char *p = (char *) malloc(sizeof(char) * 1024 * 1024);
+    char *s = "hello_world";
+    if (p) {
+        strcpy(p, s);
+    }
+    __android_log_print(ANDROID_LOG_DEBUG, "mLogU", "%p has leaked 1M", p);
+}