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8155980: ARM InterpreterMacroAssembler::get_method_counters() should not be saving caller saved registers

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Make get_method_counters() only save registers specified by caller, not all of them

Reviewed-by: dlong, jiangli
This commit is contained in:
Chris Plummer 2017-03-01 14:59:36 -08:00
parent 7519b299b3
commit 57f866aaeb
5 changed files with 56 additions and 65 deletions
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8
hotspot/src/cpu/arm/vm/templateInterpreterGenerator_arm.cpp
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@ -1401,7 +1401,13 @@ address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) {
#ifdef AARCH64
// setup RmaxStack
__ ldrh(RmaxStack, Address(RconstMethod, ConstMethod::max_stack_offset()));
__ add(RmaxStack, RmaxStack, MAX2(1, Method::extra_stack_entries())); // reserve slots for exception handler and JSR292 appendix argument
// We have to add extra reserved slots to max_stack. There are 3 users of the extra slots,
// none of which are at the same time, so we just need to make sure there is enough room
// for the biggest user:
// -reserved slot for exception handler
// -reserved slots for JSR292. Method::extra_stack_entries() is the size.
// -3 reserved slots so get_method_counters() can save some registers before call_VM().
__ add(RmaxStack, RmaxStack, MAX2(3, Method::extra_stack_entries()));
#endif // AARCH64
// see if we've got enough room on the stack for locals plus overhead.