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8255606: Enable concurrent stack processing on x86_32 platforms

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Reviewed-by: shade, rkennke, eosterlund
This commit is contained in:
Zhengyu Gu 2020-11-03 17:23:47 +00:00
parent ca216bae1a
commit 134e22a00f
7 changed files with 49 additions and 29 deletions
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18
src/hotspot/cpu/x86/c1_CodeStubs_x86.cpp
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@ -80,19 +80,29 @@ void ConversionStub::emit_code(LIR_Assembler* ce) {
#endif // !_LP64
void C1SafepointPollStub::emit_code(LIR_Assembler* ce) {
#ifdef _LP64
__ bind(_entry);
InternalAddress safepoint_pc(ce->masm()->pc() - ce->masm()->offset() + safepoint_offset());
#ifdef _LP64
__ lea(rscratch1, safepoint_pc);
__ movptr(Address(r15_thread, JavaThread::saved_exception_pc_offset()), rscratch1);
#else
const Register tmp1 = rcx;
const Register tmp2 = rdx;
__ push(tmp1);
__ push(tmp2);
__ lea(tmp1, safepoint_pc);
__ get_thread(tmp2);
__ movptr(Address(tmp2, JavaThread::saved_exception_pc_offset()), tmp1);
__ pop(tmp2);
__ pop(tmp1);
#endif /* _LP64 */
assert(SharedRuntime::polling_page_return_handler_blob() != NULL,
"polling page return stub not created yet");
address stub = SharedRuntime::polling_page_return_handler_blob()->entry_point();
__ jump(RuntimeAddress(stub));
#else
ShouldNotReachHere();
#endif /* _LP64 */
}
void CounterOverflowStub::emit_code(LIR_Assembler* ce) {