openjdk-17: use dlopen

android_mallopt seems not availabke in API 24 libc

packages/openjdk-17/android11.patch

@@ -1,34 +1,36 @@
 diff -uNr mobile-ec285598849a27f681ea6269342cf03cf382eb56/src/java.base/share/native/libjli/java.c mobile-ec285598849a27f681ea6269342cf03cf382eb56.mod/src/java.base/share/native/libjli/java.c
 --- mobile-ec285598849a27f681ea6269342cf03cf382eb56/src/java.base/share/native/libjli/java.c	2021-07-06 14:29:24.000000000 +0300
-+++ mobile-ec285598849a27f681ea6269342cf03cf382eb56.mod/src/java.base/share/native/libjli/java.c	2021-07-30 13:28:40.900486911 +0300
-@@ -50,7 +50,7 @@
-  * the CreateExecutionEnviroment will remove the -d<n> flags.
-  */
- 
--
-+#include <stdbool.h>
++++ mobile-ec285598849a27f681ea6269342cf03cf382eb56.mod/src/java.base/share/native/libjli/java.c	2021-07-30 15:23:39.352949077 +0300
+@@ -54,6 +54,24 @@
  #include "java.h"
  #include "jni.h"
  
-@@ -219,6 +219,10 @@
- #define STACK_SIZE_MINIMUM (64 * KB)
- #endif
- 
 +#ifdef __TERMUX__
-+extern bool android_mallopt(int opcode, void* arg, size_t arg_size);
++#include <stdbool.h>
++#include <dlfcn.h>
++static void android_disable_tags() {
++    void *lib_handle = dlopen("libc.so", RTLD_LAZY);
++    if (lib_handle) {
++        bool (*android_mallopt)(int opcode, void* arg, size_t arg_size) = dlsym(lib_handle, "android_mallopt");
++        if (android_mallopt) {
++            int android_malloc_tag_level = 0;
++            android_mallopt(8, &android_malloc_tag_level, sizeof(android_malloc_tag_level));
++        }
++        dlclose(lib_handle);
++    }
++}
++#else
++static void android_disable_tags(){}
 +#endif
 +
  /*
-  * Entry point.
-  */
-@@ -252,6 +256,11 @@
+  * A NOTE TO DEVELOPERS: For performance reasons it is important that
+  * the program image remain relatively small until after SelectVersion
+@@ -252,6 +270,8 @@
      _is_java_args = javaargs;
      _wc_enabled = cpwildcard;
  
-+#ifdef __TERMUX__
-+    int android_malloc_tag_level = 0;
-+    android_mallopt(8, &android_malloc_tag_level, sizeof(android_malloc_tag_level));
-+#endif
++    android_disable_tags();
 +
      InitLauncher(javaw);
      DumpState();