commit 4c5231d2cd83536584f7f1063d0afffa124fcec4
author Elliott Hughes <enh@google.com> Wed Apr 18 16:54:31 2012 -0700
committer Elliott Hughes <enh@google.com> Wed Apr 18 16:54:31 2012 -0700
tree 73287cf769bd5214812be6da87e33809818198f2
parent a7e6cb4efd9384ac1520976f2d620c72bb08b758

Work around a Mac OS libc bug.

If you're dismantling the alternate signal stack the ss_size field should be
ignored, but isn't on Mac OS.

Change-Id: Id6e93ed5089e375f0bd84a68efee36c34462cdf0

src/thread.cc

diff --git a/src/thread.cc b/src/thread.cc
index 24697ce..04c5105 100644
--- a/src/thread.cc
+++ b/src/thread.cc
@@ -220,7 +220,7 @@
   // Tell the kernel to stop using it.
   ss.ss_sp = NULL;
   ss.ss_flags = SS_DISABLE;
-  ss.ss_size = 0;
+  ss.ss_size = SIGSTKSZ; // Avoid ENOMEM failure with Mac OS' buggy libc.
   SigAltStack(&ss, NULL);
 
   // Free it.