diff src/cpu/x86/vm/sharedRuntime_x86_32.cpp @ 17780:606acabe7b5c

8031320: Use Intel RTM instructions for locks Summary: Use RTM for inflated locks and stack locks. Reviewed-by: iveresov, twisti, roland, dcubed
author kvn
date Thu, 20 Mar 2014 17:49:27 -0700
parents 55fb97c4c58d
children 62c54fcc0a35
line wrap: on
line diff
--- a/src/cpu/x86/vm/sharedRuntime_x86_32.cpp	Sat Mar 22 00:26:48 2014 +0400
+++ b/src/cpu/x86/vm/sharedRuntime_x86_32.cpp	Thu Mar 20 17:49:27 2014 -0700
@@ -1815,6 +1815,13 @@
   // Frame is now completed as far as size and linkage.
   int frame_complete = ((intptr_t)__ pc()) - start;
 
+  if (UseRTMLocking) {
+    // Abort RTM transaction before calling JNI
+    // because critical section will be large and will be
+    // aborted anyway. Also nmethod could be deoptimized.
+    __ xabort(0);
+  }
+
   // Calculate the difference between rsp and rbp,. We need to know it
   // after the native call because on windows Java Natives will pop
   // the arguments and it is painful to do rsp relative addressing
@@ -3168,6 +3175,12 @@
   };
 
   address start = __ pc();
+
+  if (UseRTMLocking) {
+    // Abort RTM transaction before possible nmethod deoptimization.
+    __ xabort(0);
+  }
+
   // Push self-frame.
   __ subptr(rsp, return_off*wordSize);     // Epilog!
 
@@ -3353,6 +3366,14 @@
   address call_pc = NULL;
   bool cause_return = (poll_type == POLL_AT_RETURN);
   bool save_vectors = (poll_type == POLL_AT_VECTOR_LOOP);
+
+  if (UseRTMLocking) {
+    // Abort RTM transaction before calling runtime
+    // because critical section will be large and will be
+    // aborted anyway. Also nmethod could be deoptimized.
+    __ xabort(0);
+  }
+
   // If cause_return is true we are at a poll_return and there is
   // the return address on the stack to the caller on the nmethod
   // that is safepoint. We can leave this return on the stack and