[binutils-gdb] [gdb/testsuite] Fix waitpid testing in next-fork-other-thread.c

[Tom de Vries <vries@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=4cfa9edb35736ddf4efd2bd8ccc885349dc69b8e

commit 4cfa9edb35736ddf4efd2bd8ccc885349dc69b8e
Author: Tom de Vries <tdevries@suse.de>
Date:   Sun Oct 2 20:18:00 2022 +0200

    [gdb/testsuite] Fix waitpid testing in next-fork-other-thread.c
    
    In next-fork-other-thread.c, there's this loop:
    ...
          do
            {
              ret = waitpid (pid, &stat, 0);
            } while (ret == EINTR);
    ...
    
    The loop condition tests for "ret == EINTR" but waitpid signals EINTR by
    returning -1 and setting errno to EINTR.
    
    Fix this by changing the loop condition to "ret == -1 && errno == EINTR".
    
    Tested on x86_64-linux.

Diff:
---
 gdb/testsuite/gdb.threads/next-fork-other-thread.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gdb/testsuite/gdb.threads/next-fork-other-thread.c b/gdb/testsuite/gdb.threads/next-fork-other-thread.c
index 377c1bc1a31..5bcdabe0464 100644
--- a/gdb/testsuite/gdb.threads/next-fork-other-thread.c
+++ b/gdb/testsuite/gdb.threads/next-fork-other-thread.c
@@ -44,7 +44,7 @@ forker (void *arg)
       do
 	{
 	  ret = waitpid (pid, &stat, 0);
-	} while (ret == EINTR);
+	} while (ret == -1 && errno == EINTR);
 
       assert (ret == pid);
       assert (WIFEXITED (stat));