Use sched_yield instead of pthread_yield

pthread_yield is not a standard POSIX function, and is not available
in musl libc. The man page says to "Use the standardized sched_yield(2)
instead"[0].

On glibc, pthread_yield is exactly equivalent to sched_yield[1].

On bionic, pthread_yield is also not available, so on Android, the
tests define a wrapper that just calls sched_yield. This wrapper
is no longer necessary if we just use sched_yield in the first
place.

[0] http://man7.org/linux/man-pages/man3/pthread_yield.3.html
[1] https://sourceware.org/git/?p=glibc.git;a=blob;f=nptl/pthread_yield.c

Bug: google-breakpad:631
Change-Id: Ie4c6be8c17cdc2f5396a7fe972fa51a97573b049
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/2097340
Reviewed-by: Mike Frysinger <vapier@chromium.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/common/linux/tests/crash_generator.cc b/src/common/linux/tests/crash_generator.cc
index 36319676..6896a688 100644
--- a/src/common/linux/tests/crash_generator.cc
+++ b/src/common/linux/tests/crash_generator.cc
@@ -33,6 +33,7 @@
 #include "common/linux/tests/crash_generator.h"
 
 #include <pthread.h>
+#include <sched.h>
 #include <signal.h>
 #include <stdio.h>
 #include <sys/mman.h>
@@ -88,7 +89,7 @@ void *thread_function(void *data) {
     exit(1);
   }
   while (true) {
-    pthread_yield();
+    sched_yield();
   }
 }