src/cpu/x86/vm/sharedRuntime_x86_64.cpp
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*** old/src/cpu/x86/vm/sharedRuntime_x86_64.cpp Thu Mar 6 11:59:53 2014
--- new/src/cpu/x86/vm/sharedRuntime_x86_64.cpp Thu Mar 6 11:59:53 2014
*** 3475,3489 ****
--- 3475,3493 ----
// Pick up the initial fp we should save
// restore rbp before stack bang because if stack overflow is thrown it needs to be pushed (and preserved)
__ movptr(rbp, Address(rdi, Deoptimization::UnrollBlock::initial_info_offset_in_bytes()));
// Stack bang to make sure there's enough room for these interpreter frames.
+ #ifdef ASSERT
+ // Compilers generate code that bang the stack by as much as the
+ // interpreter would need. So this stack banging should never
+ // trigger a fault. Verify that it does not on non product builds.
if (UseStackBanging) {
__ movl(rbx, Address(rdi, Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes()));
__ bang_stack_size(rbx, rcx);
}
+ #endif
// Load address of array of frame pcs into rcx
__ movptr(rcx, Address(rdi, Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes()));
// Trash the old pc
*** 3668,3682 ****
--- 3672,3690 ----
// Pick up the initial fp we should save
// restore rbp before stack bang because if stack overflow is thrown it needs to be pushed (and preserved)
__ movptr(rbp, Address(rdi, Deoptimization::UnrollBlock::initial_info_offset_in_bytes()));
// Stack bang to make sure there's enough room for these interpreter frames.
+ #ifdef ASSERT
+ // Compilers generate code that bang the stack by as much as the
+ // interpreter would need. So this stack banging should never
+ // trigger a fault. Verify that it does not on non product builds.
if (UseStackBanging) {
__ movl(rbx, Address(rdi ,Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes()));
__ bang_stack_size(rbx, rcx);
}
+ #endif
// Load address of array of frame pcs into rcx (address*)
__ movptr(rcx, Address(rdi, Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes()));
// Trash the return pc
src/cpu/x86/vm/sharedRuntime_x86_64.cpp
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