runtime: For c-archive/c-shared, install signal handlers synchronously.

    
    This is a port of https://golang.org/cl/18150 to the gccgo runtime.
    
    The previous behaviour of installing the signal handlers in a separate
    thread meant that Go initialization raced with non-Go initialization if
    the non-Go initialization also wanted to install signal handlers.  Make
    installing signal handlers synchronous so that the process-wide behavior
    is predictable.
    
    Reviewed-on: https://go-review.googlesource.com/19494

From-SVN: r233393

1 files changed, 4 insertions, 2 deletions

diff --git a/libgo/runtime/go-libmain.c b/libgo/runtime/go-libmain.c
index f578aab..6884f3a 100644
--- a/libgo/runtime/go-libmain.c
+++ b/libgo/runtime/go-libmain.c
@@ -59,6 +59,10 @@ initfn (int argc, char **argv, char** env __attribute__ ((unused)))
   struct args *a;
   pthread_t tid;
 
+  runtime_isarchive = true;
+
+  runtime_initsig(true);
+
   a = (struct args *) malloc (sizeof *a);
   if (a == NULL)
     die ("malloc", errno);
@@ -88,8 +92,6 @@ gostart (void *arg)
 {
   struct args *a = (struct args *) arg;
 
-  runtime_isarchive = true;
-
   if (runtime_isstarted)
     return NULL;
   runtime_isstarted = true;