mjit: provide more diagnostics for waitpid failures

Also, enable check for defined(_WIN32) macro for SIGCHLD_LOSSY, too.

[Bug #14867]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63796 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 2 deletions

diff --git a/mjit.c b/mjit.c
index fb4b153cc3..49bac227a0 100644
--- a/mjit.c
+++ b/mjit.c
@@ -422,8 +422,9 @@ exec_process(const char *path, char *const argv[])
                      : waitpid(pid, &stat, 0);
         if (r == -1) {
             if (errno == EINTR) continue;
-            fprintf(stderr, "[%d] waitpid(%d): %s\n",
-                    getpid(), pid, strerror(errno));
+            fprintf(stderr, "[%d] waitpid(%d): %s (SIGCHLD=%d,%u)\n",
+                    getpid(), pid, strerror(errno),
+                    RUBY_SIGCHLD, SIGCHLD_LOSSY);
             break;
         }
         else if (r == pid) {