From 593aab732da2860a8394906dda0cdfbeda42b520 Mon Sep 17 00:00:00 2001
From: Narayan Kamath <narayan@google.com>
Date: Tue, 9 Aug 2016 17:23:31 +0100
Subject: [PATCH] Zygote: Better logging for setgroups failures.

bug: 28865594
Change-Id: I88590afe6a05e2d1967c9bca74c79de3871440b8
---
 core/jni/com_android_internal_os_Zygote.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/core/jni/com_android_internal_os_Zygote.cpp b/core/jni/com_android_internal_os_Zygote.cpp
index 3f4b2a61321b8..a04fc2a70686a 100644
--- a/core/jni/com_android_internal_os_Zygote.cpp
+++ b/core/jni/com_android_internal_os_Zygote.cpp
@@ -176,7 +176,9 @@ static void SetGids(JNIEnv* env, jintArray javaGids) {
   }
   int rc = setgroups(gids.size(), reinterpret_cast<const gid_t*>(&gids[0]));
   if (rc == -1) {
-    RuntimeAbort(env, __LINE__, "setgroups failed");
+    std::ostringstream oss;
+    oss << "setgroups failed: " << strerror(errno) << ", gids.size=" << gids.size();
+    RuntimeAbort(env, __LINE__, oss.str().c_str());
   }
 }