erts: Disable native stack if we can't make it signal-safe

erlang · Nov 19, 2020 · 5d98ec5 · 5d98ec5
1 parent f206974
commit 5d98ec5
Showing 1 changed file with 19 additions and 3 deletions.
diff --git a/erts/configure.in b/erts/configure.in
@@ -2900,9 +2900,25 @@ if test ${enable_jit} != no; then
       # https://undeadly.org/cgi?action=article;sid=20180310000858
       ;;
     *)
-      # By default, BEAMASM will use the native stack.
-      AC_DEFINE(NATIVE_ERLANG_STACK, [],
-                [Define if we can use the native stack for Erlang code])
+      # Use the native stack if we can safely redirect OS signals to a
+      # different stack.
+      AC_MSG_CHECKING([for safe signal delivery])
+      AC_TRY_COMPILE(
+        [#include <signal.h>],
+        [#if defined(__APPLE__) && defined(__MACH__) && !defined(__DARWIN__)
+         #define __DARWIN__ 1
+         #endif
+         #if !(defined(__GLIBC__) || defined(__DARWIN__) ||
+               defined(__NetBSD__) || defined(__FreeBSD__) ||
+               defined(__sun__) || defined(__WIN32__))
+         /* Unknown libc -- assume musl, which does not allow safe signals. */
+         #error "unknown libc"
+         #endif],
+        [AC_MSG_RESULT([yes])
+         AC_DEFINE(NATIVE_ERLANG_STACK, [],
+                   [Define if we can use the native stack for Erlang code])],
+        [AC_MSG_WARN([no, disabling native stack in JIT])]
+      )
       ;;
   esac
 fi