From c22e138c878eb9d8cbc41b6556fba1ec420ecfc0 Mon Sep 17 00:00:00 2001
From: Ioannis Tsakpinis <iotsakp@gmail.com>
Date: Sun, 13 Sep 2020 16:38:02 +0300
Subject: [PATCH] feat(core): report mismatching native jars. Close #587

---
 build.xml                                     |  7 ++-
 .../main/java/org/lwjgl/system/Library.java   | 50 ++++++++++++++++++-
 2 files changed, 55 insertions(+), 2 deletions(-)

diff --git a/build.xml b/build.xml
index 8be9c5ebbe..157951b5b1 100644
--- a/build.xml
+++ b/build.xml
@@ -881,8 +881,12 @@
     <macrodef name="lwjgl-jar">
         <attribute name="destfile"/>
         <attribute name="title"/>
+        <attribute name="platform" default=""/>
         <element name="content" optional="true" implicit="true"/>
         <sequential>
+            <local name="platform-attrib"/>
+            <condition property="platform-attrib" value="true" else="false"><not><length string="@{platform}" length="0"/></not></condition>
+
             <jar destfile="@{destfile}" level="9" index="true" indexmetainf="true" whenmanifestonly="skip">
                 <manifest>
                     <attribute name="Specification-Title" value="Lightweight Java Game Library - @{title}"/>
@@ -891,6 +895,7 @@
                     <attribute name="Implementation-Title" value="${module}"/>
                     <attribute name="Implementation-Version" value="${revision}"/>
                     <attribute name="Implementation-Vendor" value="lwjgl.org"/>
+                    <attribute name="LWJGL-Platform" value="@{platform}" if:true="${platform-attrib}"/>
                     <attribute name="Multi-Release" value="true" if:set="jdk9"/>
                 </manifest>
                 <content/>
@@ -913,7 +918,7 @@
                 </resourcecount>
             </condition>
 
-            <lwjgl-jar destfile="${release}/${module}/${module}-natives-@{platform}.jar" title="@{title}" unless:set="platform.skip">
+            <lwjgl-jar destfile="${release}/${module}/${module}-natives-@{platform}.jar" platform="@{path}" title="@{title}" unless:set="platform.skip">
                 <fileset dir="${release}/${module}/native" includes="@{path}/${module.path}/*.@{type}*"/>
                 <fileset dir="${release}/${module}/native/@{path}" includes="META-INF/versions/9/module-info.class" if:set="jdk9"/>
                 <content/>
diff --git a/modules/lwjgl/core/src/main/java/org/lwjgl/system/Library.java b/modules/lwjgl/core/src/main/java/org/lwjgl/system/Library.java
index c7798d9739..dd40c87644 100644
--- a/modules/lwjgl/core/src/main/java/org/lwjgl/system/Library.java
+++ b/modules/lwjgl/core/src/main/java/org/lwjgl/system/Library.java
@@ -15,6 +15,7 @@
 import java.security.*;
 import java.util.*;
 import java.util.function.*;
+import java.util.jar.*;
 import java.util.regex.*;
 
 import static org.lwjgl.system.APIUtil.*;
@@ -41,7 +42,7 @@ public final class Library {
         if (DEBUG) {
             apiLog("Version: " + Version.getVersion());
             apiLog("\t OS: " + System.getProperty("os.name") + " v" + System.getProperty("os.version"));
-            apiLog("\tJRE: " + System.getProperty("java.version") + " " + System.getProperty("os.arch"));
+            apiLog("\tJRE: " + Platform.get().getName() + " " + System.getProperty("os.arch") + " " + System.getProperty("java.version"));
             apiLog(
                 "\tJVM: " + System.getProperty("java.vm.name") + " v" + System.getProperty("java.vm.version") + " by " + System.getProperty("java.vm.vendor")
             );
@@ -158,6 +159,7 @@ public static void loadSystem(
             apiLog(String.format("\t%s not found in %s", libName, JAVA_LIBRARY_PATH));
         }
 
+        detectPlatformMismatch(context, module);
         printError(true);
         throw new UnsatisfiedLinkError("Failed to locate library: " + libName);
     }
@@ -319,6 +321,7 @@ private static SharedLibrary loadNative(Class<?> context, String module, String
         }
 
         if (printError) {
+            detectPlatformMismatch(context, module);
             printError(bundledWithLWJGL);
         }
         throw new UnsatisfiedLinkError("Failed to locate library: " + libName);
@@ -478,6 +481,51 @@ private static Path findFile(String path, String file) {
         return null;
     }
 
+    private static void detectPlatformMismatch(Class<?> context, String module) {
+        String moduleTitle = module.equals("org.lwjgl") ? "lwjgl" : "lwjgl-" + module.substring("org.lwjgl.".length());
+
+        List<String> platforms = new ArrayList<>(8);
+        try {
+            Enumeration<URL> manifests = context.getClassLoader().getResources(JarFile.MANIFEST_NAME);
+            while (manifests.hasMoreElements()) {
+                try (InputStream is = manifests.nextElement().openStream()) {
+                    Manifest   manifest = new Manifest(is);
+                    Attributes attribs  = manifest.getMainAttributes();
+
+                    if (moduleTitle.equals(attribs.getValue("Implementation-Title"))) {
+                        String jarPlatform = attribs.getValue("LWJGL-Platform");
+                        if (jarPlatform != null) {
+                            platforms.add(jarPlatform);
+                        }
+                    }
+                }
+            }
+        } catch (IOException ignored) {
+        }
+
+        if (!platforms.isEmpty()) {
+            DEBUG_STREAM.println("[LWJGL] Platform/architecture mismatch detected for module: " + module);
+            DEBUG_STREAM.println("\tJVM platform:");
+            DEBUG_STREAM.format(
+                "\t\t%s %s %s\n",
+                Platform.get().getName(),
+                System.getProperty("os.arch"),
+                System.getProperty("java.version")
+            );
+            DEBUG_STREAM.format(
+                "\t\t%s v%s by %s\n",
+                System.getProperty("java.vm.name"),
+                System.getProperty("java.vm.version"),
+                System.getProperty("java.vm.vendor")
+            );
+            DEBUG_STREAM.format(
+                "\tPlatform%s available on classpath:\n\t\t%s\n",
+                (platforms.size() == 1 ? "" : "s"),
+                String.join("\n\t\t", platforms)
+            );
+        }
+    }
+
     private static void printError(boolean bundledWithLWJGL) {
         printError(
             "[LWJGL] Failed to load a library. Possible solutions:\n" + (bundledWithLWJGL