Ensure alternate signal stack is minimum size.
On Mac a sigaltstack may need to be 32KB, setting it to 16KB causes
sigaltstack to fail.
Change-Id: I87f315ae2fb6be4db40a34b350ad5789ff76c113
diff --git a/runtime/thread_linux.cc b/runtime/thread_linux.cc
index 9aacb30..1254056 100644
--- a/runtime/thread_linux.cc
+++ b/runtime/thread_linux.cc
@@ -33,8 +33,11 @@
}
// The default SIGSTKSZ on linux is 8K. If we do any logging in a signal
-// handler this is too small. We allocate 16K instead.
-static constexpr int kHostAltSigStackSize = 16*1024; // 16K signal stack.
+// handler this is too small. We allocate 16K instead or the minimum signal
+// stack size.
+// TODO: We shouldn't do logging (with locks) in signal handlers.
+static constexpr int kHostAltSigStackSize =
+ 16 * KB < MINSIGSTKSZ ? MINSIGSTKSZ : 16 * KB;
void Thread::SetUpAlternateSignalStack() {
// Create and set an alternate signal stack.