Actually ask the pthread implementation for the stack guard size.
(cherry-pick 307091dc306c34ce9e4ee6cc3b467807b3a3bd12.)
Bug: 17111575
Change-Id: I23919b1e8aeff627a65daf57f1109bec60b196cc
diff --git a/runtime/utils.h b/runtime/utils.h
index c89c41f..ad08697 100644
--- a/runtime/utils.h
+++ b/runtime/utils.h
@@ -414,7 +414,7 @@
std::string GetThreadName(pid_t tid);
// Returns details of the given thread's stack.
-void GetThreadStack(pthread_t thread, void** stack_base, size_t* stack_size);
+void GetThreadStack(pthread_t thread, void** stack_base, size_t* stack_size, size_t* guard_size);
// Reads data from "/proc/self/task/${tid}/stat".
void GetTaskStats(pid_t tid, char* state, int* utime, int* stime, int* task_cpu);