JNI_GetCreatedJavaVMs

[char-ptr]

When using this i get linker errors.

The code which i used

        let mut jvm = null_mut();
        let mut found:jsize = 0;
        let mut jvm_worky = jni::sys::JNI_GetCreatedJavaVMs( &mut jvm,1,&mut found);

error

error: linking with link.exe failed: exit code: 1120
|
= note: "E:\Applications\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.30.30705\bin\HostX64\x64\link.exe" "/DEF:C:\Users\Luna\AppData\Local\Temp\rustc2LoRkl\lib.def" "/NOLOGO" "X:\meta\dev\rust\Shimakaze\target\debug\deps\Shimakaze.1byzs9aaoeboij1f.rcgu.o" "X:\meta\dev\rust\Shimakaze\target\debug\deps\Shimakaze.23idsa2h5m4re0n7.rcgu.o" "X:\meta\dev\rust\Shimakaze\target\debug\deps\Shimakaze.2u6h2lnoz1tkqhvf.rcgu.o" "X:\meta\dev\rust\Shimakaze\target\debug\deps\Shimakaze.3tbrj5df0601ijj4.rcgu.o" "X:\meta\dev\rust\Shimakaze\target\debug\deps\Shimakaze.3wjcuz3qbx2gbnyl.rcgu.o" "X:\meta\dev\rust\Shimakaze\target\debug\deps\Shimakaze.3x2g0e2hwqmehtp8.rcgu.o" "X:\meta\dev\rust\Shimakaze\target\debug\deps\Shimakaze.57k2cudsxfgkp4pr.rcgu.o" "X:\meta\dev\rust\Shimakaze\target\debug\deps\Shimakaze.6b40e381e4fagx6.rcgu.o" "X:\meta\dev\rust\Shimakaze\target\debug\deps\Shimakaze.az2bwusxx6ld47f.rcgu.o" "X:\meta\dev\rust\Shimakaze\target\debug\deps\Shimakaze.3q890reoho8keq5z.rcgu.o" "/LIBPATH:X:\meta\dev\rust\Shimakaze\target\debug\deps" "/LIBPATH:X:\meta\dev\rust\Shimakaze\target\debug\build\libudis86-sys-cf96a0ee695f5f98\out" "/LIBPATH:C:\Users\Luna\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-msvc\lib" "X:\meta\dev\rust\Shimakaze\target\debug\deps\libwinapi-bb0ca2babfa2b4a5.rlib" "X:\meta\dev\rust\Shimakaze\target\debug\deps\libjni-1de0fc098823e7b5.rlib" "X:\meta\dev\rust\Shimakaze\target\debug\deps\libcesu8-a7f08aae99a2104d.rlib" "X:\meta\dev\rust\Shimakaze\target\debug\deps\liblog-97e4acb7b95be317.rlib" "X:\meta\dev\rust\Shimakaze\target\debug\deps\libcfg_if-b01931459ea167fc.rlib" "X:\meta\dev\rust\Shimakaze\target\debug\deps\libcombine-cbc02205a55fd8f3.rlib" "X:\meta\dev\rust\Shimakaze\target\debug\deps\libmemchr-665d2c8c4b4cfe12.rlib" "X:\meta\dev\rust\Shimakaze\target\debug\deps\libbytes-49090a364b4888f6.rlib" "X:\meta\dev\rust\Shimakaze\target\debug\deps\libthiserror-500c731b3379430b.rlib" "X:\meta\dev\rust\Shimakaze\target\debug\deps\libjni_sys-dd815645ea921445.rlib" "C:\Users\Luna\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-msvc\lib\libstd-2915a6598b644f05.rlib" "C:\Users\Luna\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-msvc\lib\libpanic_unwind-600ba5171389b19e.rlib" "C:\Users\Luna\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-msvc\lib\libstd_detect-9551a16e5791cc07.rlib" "C:\Users\Luna\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-msvc\lib\librustc_demangle-9accc95c56c66c72.rlib" "C:\Users\Luna\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-msvc\lib\libhashbrown-174e0bf43a687c69.rlib" "C:\Users\Luna\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-msvc\lib\librustc_std_workspace_alloc-c67793bd74cdc09e.rlib" "C:\Users\Luna\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-msvc\lib\libunwind-f28b8bbd63ca4a61.rlib" "C:\Users\Luna\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-msvc\lib\libcfg_if-4242b0a6ddf9db60.rlib" "C:\Users\Luna\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-msvc\lib\liblibc-5c6e234e3431724c.rlib" "C:\Users\Luna\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-msvc\lib\liballoc-ef0d43e84d25019c.rlib" "C:\Users\Luna\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-msvc\lib\librustc_std_workspace_core-665ed95809278e59.rlib" "C:\Users\Luna\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-msvc\lib\libcore-c2100e40c13f915d.rlib" "C:\Users\Luna\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-msvc\lib\libcompiler_builtins-9fa99e8814512f70.rlib" "advapi32.lib" "cfgmgr32.lib" "gdi32.lib" "kernel32.lib" "msimg32.lib" "opengl32.lib" "user32.lib" "winspool.lib" "kernel32.lib" "ws2_32.lib" "bcrypt.lib" "advapi32.lib" "userenv.lib" "kernel32.lib" "msvcrt.lib" "/NXCOMPAT" "/LIBPATH:C:\Users\Luna\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\x86_64-pc-windows-msvc\lib" "/OUT:X:\meta\dev\rust\Shimakaze\target\debug\deps\Shimakaze.dll" "/OPT:REF,NOICF" "/DLL" "/IMPLIB:X:\meta\dev\rust\Shimakaze\target\debug\deps\Shimakaze.dll.lib" "/DEBUG" "/NATVIS:C:\Users\Luna\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\etc\intrinsic.natvis" "/NATVIS:C:\Users\Luna\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\etc\liballoc.natvis" "/NATVIS:C:\Users\Luna\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\etc\libcore.natvis" "/NATVIS:C:\Users\Luna\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\etc\libstd.natvis"
= note: Creating library X:\meta\dev\rust\Shimakaze\target\debug\deps\Shimakaze.dll.lib and object X:\meta\dev\rust\Shimakaze\target\debug\deps\Shimakaze.dll.exp
Shimakaze.23idsa2h5m4re0n7.rcgu.o : error LNK2019: unresolved external symbol JNI_GetCreatedJavaVMs referenced in function _ZN9Shimakaze10dll_attach17h80d4ba29a706405fE
X:\meta\dev\rust\Shimakaze\target\debug\deps\Shimakaze.dll : fatal error LNK1120: 1 unresolved externals

[fpoli]

Could you add a complete minimal example? JNI_GetCreatedJavaVMs works fine when used in duchess with OpenJDK 20.0.1.

[NiiightmareXD]

Could you add a complete minimal example? JNI_GetCreatedJavaVMs works fine when used in duchess with OpenJDK 20.0.1.

it doesn't work for me neither here is a example

[dependencies]
jni = { version = "0.21.1", features = ["invocation"] }
toy-arms = { git = "https://github.com/pseuxide/toy-arms" }

[lib]
crate-type = ["cdylib"]

use std::slice;
use toy_arms::internal;

internal::create_entrypoint!(client);

fn client() {
    unsafe {
        let vms = get_created_java_vms().unwrap();
        let mut _jvm;
        for vm in vms {
            match jni::JavaVM::from_raw(vm) {
                Ok(java_vm) => _jvm = java_vm,
                Err(_) => println!("Failed to create jvm"),
            };
        }
    };
}

unsafe fn get_created_java_vms() -> Result<Vec<*mut jni::sys::JavaVM>, String> {
    let vm_buf: *mut *mut jni::sys::JavaVM = std::ptr::null_mut();
    let buf_len: jni::sys::jsize = 0;
    let mut n_vms: jni::sys::jsize = 0;

    let result = jni::sys::JNI_GetCreatedJavaVMs(vm_buf, buf_len, &mut n_vms);

    if result != 0 {
        return Err(format!(
            "JNI_GetCreatedJavaVMs failed with error code {}",
            result
        ));
    }

    if buf_len < n_vms {
        return Err(format!(
            "Buffer length ({}) is smaller than the number of VMs ({})",
            buf_len, n_vms
        ));
    }

    let vms: Vec<_> = slice::from_raw_parts(vm_buf, n_vms as usize).to_vec();

    Ok(vms)
}

error: linking with `rust-lld.exe` failed: exit code: 1
note: rust-lld: error: undefined symbol: JNI_GetCreatedJavaVMs