Add GNU/Hurd support (#567)

Author: sthibaul

src/symbolize/gimli.rs

@@ -35,6 +35,7 @@ cfg_if::cfg_if! {
         target_os = "freebsd",
         target_os = "fuchsia",
         target_os = "haiku",
+        target_os = "hurd",
         target_os = "ios",
         target_os = "linux",
         target_os = "macos",
@@ -231,6 +232,7 @@ cfg_if::cfg_if! {
             target_os = "linux",
             target_os = "fuchsia",
             target_os = "freebsd",
+            target_os = "hurd",
             target_os = "openbsd",
             target_os = "netbsd",
             all(target_os = "android", feature = "dl_iterate_phdr"),

src/symbolize/gimli/elf.rs

@@ -308,7 +308,7 @@ const DEBUG_PATH: &[u8] = b"/usr/lib/debug";
 
 fn debug_path_exists() -> bool {
     cfg_if::cfg_if! {
-        if #[cfg(any(target_os = "freebsd", target_os = "linux"))] {
+        if #[cfg(any(target_os = "freebsd", target_os = "hurd", target_os = "linux"))] {
             use core::sync::atomic::{AtomicU8, Ordering};
             static DEBUG_PATH_EXISTS: AtomicU8 = AtomicU8::new(0);
 

src/symbolize/gimli/libs_dl_iterate_phdr.rs

@@ -18,14 +18,18 @@ pub(super) fn native_libraries() -> Vec<Library> {
 }
 
 fn infer_current_exe(base_addr: usize) -> OsString {
-    if let Ok(entries) = super::parse_running_mmaps::parse_maps() {
-        let opt_path = entries
-            .iter()
-            .find(|e| e.ip_matches(base_addr) && e.pathname().len() > 0)
-            .map(|e| e.pathname())
-            .cloned();
-        if let Some(path) = opt_path {
-            return path;
+    cfg_if::cfg_if! {
+        if #[cfg(not(target_os = "hurd"))] {
+                if let Ok(entries) = super::parse_running_mmaps::parse_maps() {
+                let opt_path = entries
+                    .iter()
+                    .find(|e| e.ip_matches(base_addr) && e.pathname().len() > 0)
+                    .map(|e| e.pathname())
+                    .cloned();
+                if let Some(path) = opt_path {
+                    return path;
+                }
+            }
         }
     }
     env::current_exe().map(|e| e.into()).unwrap_or_default()