From 13cec07fa39ec52a183f99e66df547d4c488146f Mon Sep 17 00:00:00 2001
From: tomikun <60690056+alexytomi@users.noreply.github.com>
Date: Thu, 30 Jul 2026 19:02:11 +0800
Subject: [PATCH] feat: Set env vars for JavaVM pointers

For use primarily by mods who want to control android runtime for some
reason.
---
 .../src/main/jni/input_bridge_v3.c              | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/app_pojavlauncher/src/main/jni/input_bridge_v3.c b/app_pojavlauncher/src/main/jni/input_bridge_v3.c
index 409f72c03..f6805b98a 100644
--- a/app_pojavlauncher/src/main/jni/input_bridge_v3.c
+++ b/app_pojavlauncher/src/main/jni/input_bridge_v3.c
@@ -41,6 +41,15 @@ jint JNI_OnLoad(JavaVM* vm, __attribute__((unused)) void* reserved) {
         LOGI("Saving DVM environ...");
         //Save dalvik global JavaVM pointer
         pojav_environ->dalvikJavaVMPtr = vm;
+        char buf[32] = "-1";
+        int ret = snprintf(buf, sizeof(buf), "%p", pojav_environ->dalvikJavaVMPtr);
+        if (ret < 0 || ret >= sizeof(buf)) {
+            LOGE("Failed to set DALVIK_JAVAVM to pointer");
+            setenv("DALVIK_JAVAVM", "-1", 1);
+        } else {
+            setenv("DALVIK_JAVAVM", buf, 1);
+        }
+
         // Sets up the stuff that GLFW/JVM needs to communicate to Android
         // These methods are called from GLFW/JVM and connect to Android-side impls
         // These aren't separated out into a method because these can be ran so long as we are in Android-land
@@ -57,6 +66,14 @@ jint JNI_OnLoad(JavaVM* vm, __attribute__((unused)) void* reserved) {
     } else if (pojav_environ->dalvikJavaVMPtr != vm) {
         LOGI("Saving JVM environ...");
         pojav_environ->runtimeJavaVMPtr = vm;
+        char buf[32] = "-1";
+        int ret = snprintf(buf, sizeof(buf), "%p", pojav_environ->runtimeJavaVMPtr);
+        if (ret < 0 || ret >= sizeof(buf)) {
+            LOGE("Failed to set OPENJDK_JAVAVM to pointer");
+            setenv("OPENJDK_JAVAVM", "-1", 1);
+        } else {
+            setenv("OPENJDK_JAVAVM", buf, 1);
+        }
         JNIEnv *vmEnv;
         (*pojav_environ->runtimeJavaVMPtr)->GetEnv(pojav_environ->runtimeJavaVMPtr, (void**) &vmEnv, JNI_VERSION_1_4);
         hookExec(vmEnv);