commit 5d9a7ba0dc9c24ed4e4efa9cac0e796fd524b308
author Elliott Hughes <enh@google.com> Fri May 30 19:00:03 2014 -0700
committer Elliott Hughes <enh@google.com> Mon Jun 02 10:32:55 2014 -0700
tree 4674df3b5064cb38211453b6e887c364f0c66f05
parent 831405b749d15a11fb947a40d61fd858e952d860

Avoid a system call in 'gettid'.

System calls can be pretty slow. This is mako, which has one of our
lowest latencies:

                       iterations      ns/op
  BM_unistd_getpid       10000000        209
  BM_unistd_gettid      200000000          8

Bug: 15297299 (kernel panic from too many gettid calls)
Bug: 15315766 (excessive gettid overhead in liblogd)
Change-Id: I49656c0fc5b5d092390264a59e4f2c0d8a8b1aeb

libc/Android.mk

diff --git a/libc/Android.mk b/libc/Android.mk
index c573e30..4783bd3 100644
--- a/libc/Android.mk
+++ b/libc/Android.mk
@@ -128,6 +128,7 @@
     bionic/getauxval.cpp \
     bionic/getcwd.cpp \
     bionic/getpgrp.cpp \
+    bionic/gettid.cpp \
     bionic/inotify_init.cpp \
     bionic/lchown.cpp \
     bionic/lfs64_support.cpp \