jvmti_rs/wrapper/jvmtifns/
system_properties.rs

1use std::{
2    os::raw::c_char,
3    ptr,
4};
5
6use jni::strings::JNIString;
7
8use crate::{errors::*, JVMTIEnv, slice_raw, sys::*};
9
10impl<'a> JVMTIEnv<'a> {
11    pub fn get_system_properties(&self) -> Result<Vec<String>> {
12        let mut count: jint = 0 as jint;
13        let mut properties: *mut *mut c_char = ptr::null_mut();
14
15        let res = jvmti_call_result!(self.jvmti_raw(), GetSystemProperties,
16            &mut count,
17            &mut properties
18        );
19        jvmti_error_code_to_result(res)?;
20
21        if count == 0 {
22            return Ok(vec![]);
23        }
24
25        let items = slice_raw(properties, count);
26        let mut strings: Vec<String> = Vec::with_capacity(count as usize);
27        for &item in items.iter() {
28            strings.push(self.build_string(item)?.into())
29        }
30        self.deallocate_raw(properties as jmemory)?;
31        Ok(strings)
32    }
33
34    pub fn get_system_property<S>(&self, property: S) -> Result<String>
35        where
36            S: Into<JNIString> {
37        let ffi_name = property.into();
38
39        let mut value = ptr::null_mut();
40        let res = jvmti_call_result!(self.jvmti_raw(), GetSystemProperty,
41            ffi_name.as_ptr(),
42            &mut value
43        );
44        jvmti_error_code_to_result(res)?;
45        Ok(self.build_string(value)?.into())
46    }
47
48    pub fn set_system_property<S>(&self, property: S, value: S) -> Result<()>
49        where
50            S: Into<JNIString> {
51        let ffi_name = property.into();
52        let ffi_value = value.into();
53        jvmti_call!(self.jvmti_raw(), SetSystemProperty,
54            ffi_name.as_ptr(),
55            ffi_value.as_ptr()
56        );
57    }
58}
jvmti_rs/wrapper/jvmtifns/system_properties.rs

jvmti_rs/wrapper/jvmtifns/
system_properties.rs
