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Use mod real_fn instead of impl real_fn (for cdylib) #14

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Use mod real_fn instead of impl real_fn (for cdylib) #14

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16 changes: 6 additions & 10 deletions src/ld_preload.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -23,13 +23,9 @@ pub static INITIALIZE_CTOR: extern "C" fn() = ::initialize;
#[macro_export]
macro_rules! hook {
(unsafe fn $real_fn:ident ( $($v:ident : $t:ty),* ) -> $r:ty => $hook_fn:ident $body:block) => {
#[allow(non_camel_case_types)]
pub struct $real_fn {__private_field: ()}
#[allow(non_upper_case_globals)]
static $real_fn: $real_fn = $real_fn {__private_field: ()};

impl $real_fn {
fn get(&self) -> unsafe extern fn ( $($v : $t),* ) -> $r {
mod $real_fn {
use super::*; //required for parameter types
pub fn get_dlsym_next() -> unsafe extern fn ( $($v : $t),* ) -> $r {
use ::std::sync::{Once, ONCE_INIT};

static mut REAL: *const u8 = 0 as *const u8;
Expand All @@ -46,10 +42,10 @@ macro_rules! hook {
#[no_mangle]
pub unsafe extern fn $real_fn ( $($v : $t),* ) -> $r {
if $crate::initialized() {
::std::panic::catch_unwind(|| $hook_fn ( $($v),* )).ok()
::std::panic::catch_unwind(|| super::$hook_fn ( $($v),* )).ok()
} else {
None
}.unwrap_or_else(|| $real_fn.get() ( $($v),* ))
}.unwrap_or_else(|| get_dlsym_next() ( $($v),* ))
}
}

Expand All @@ -66,6 +62,6 @@ macro_rules! hook {
#[macro_export]
macro_rules! real {
($real_fn:ident) => {
$real_fn.get()
$real_fn::get_dlsym_next()
};
}