commit 3e4590143904057bdc62b7bd7f38bd7429fff8e6
author Josh Gao <jmgao@google.com> Fri Jun 24 16:13:33 2016 -0700
committer Josh Gao <jmgao@google.com> Tue Jun 28 15:52:59 2016 -0700
tree 09422d3505631f04ee6ebac8e1f79d213e04db2e
parent 250667aaf69bcb701fea099caef6204ad84b1d32

Make getpid work before the main thread is initialized.

Bug: http://b/29622562
Test: code dependent on this change no longer crashes
Change-Id: I40936f7b35d9e58182aeb2e34e52f54088700825

libc/bionic/getpid.cpp

diff --git a/libc/bionic/getpid.cpp b/libc/bionic/getpid.cpp
index a3d5b35..779b147 100644
--- a/libc/bionic/getpid.cpp
+++ b/libc/bionic/getpid.cpp
@@ -35,10 +35,12 @@
 pid_t getpid() {
   pthread_internal_t* self = __get_thread();
 
-  // Do we have a valid cached pid?
-  pid_t cached_pid;
-  if (__predict_true(self->get_cached_pid(&cached_pid))) {
-    return cached_pid;
+  if (__predict_true(self)) {
+    // Do we have a valid cached pid?
+    pid_t cached_pid;
+    if (__predict_true(self->get_cached_pid(&cached_pid))) {
+      return cached_pid;
+    }
   }
 
   // We're still in the dynamic linker or we're in the middle of forking, so ask the kernel.