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diff src/share/vm/opto/output.cpp @ 17980:0bf37f737702

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8032410: compiler/uncommontrap/TestStackBangRbp.java times out on Solaris-Sparc V9 Summary: make compiled code bang the stack by the worst case size of the interpreter frame at deoptimization points. Reviewed-by: twisti, kvn
author roland
date Tue, 01 Apr 2014 09:36:49 +0200
parents 17b2fbdb6637
children 52b4284cb496 b6a8cc1e0d92
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--- a/src/share/vm/opto/output.cpp	Mon Jun 09 15:42:31 2014 -0700
+++ b/src/share/vm/opto/output.cpp	Tue Apr 01 09:36:49 2014 +0200
@@ -165,8 +165,13 @@
   // Determine if we need to generate a stack overflow check.
   // Do it if the method is not a stub function and
   // has java calls or has frame size > vm_page_size/8.
+  // The debug VM checks that deoptimization doesn't trigger an
+  // unexpected stack overflow (compiled method stack banging should
+  // guarantee it doesn't happen) so we always need the stack bang in
+  // a debug VM.
   return (UseStackBanging && stub_function() == NULL &&
-          (has_java_calls() || frame_size_in_bytes > os::vm_page_size()>>3));
+          (has_java_calls() || frame_size_in_bytes > os::vm_page_size()>>3
+           DEBUG_ONLY(|| true)));
 }
 
 bool Compile::need_register_stack_bang() const {