394 |
394 |
395 void TemplateInterpreterGenerator::generate_stack_overflow_check(Register Rframe_size, |
395 void TemplateInterpreterGenerator::generate_stack_overflow_check(Register Rframe_size, |
396 Register Rscratch, |
396 Register Rscratch, |
397 Register Rscratch2) { |
397 Register Rscratch2) { |
398 const int page_size = os::vm_page_size(); |
398 const int page_size = os::vm_page_size(); |
399 Address saved_exception_pc(G2_thread, JavaThread::saved_exception_pc_offset()); |
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400 Label after_frame_check; |
399 Label after_frame_check; |
401 |
400 |
402 assert_different_registers(Rframe_size, Rscratch, Rscratch2); |
401 assert_different_registers(Rframe_size, Rscratch, Rscratch2); |
403 |
402 |
404 __ set(page_size, Rscratch); |
403 __ set(page_size, Rscratch); |
434 |
433 |
435 // the frame is greater than one page in size, so check against |
434 // the frame is greater than one page in size, so check against |
436 // the bottom of the stack |
435 // the bottom of the stack |
437 __ cmp_and_brx_short(SP, Rscratch, Assembler::greater, Assembler::pt, after_frame_check); |
436 __ cmp_and_brx_short(SP, Rscratch, Assembler::greater, Assembler::pt, after_frame_check); |
438 |
437 |
439 // Save the return address as the exception pc |
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440 __ st_ptr(O7, saved_exception_pc); |
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441 |
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442 // the stack will overflow, throw an exception |
438 // the stack will overflow, throw an exception |
443 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError)); |
439 |
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440 // Note that SP is restored to sender's sp (in the delay slot). This |
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441 // is necessary if the sender's frame is an extended compiled frame |
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442 // (see gen_c2i_adapter()) and safer anyway in case of JSR292 |
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443 // adaptations. |
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444 |
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445 // Note also that the restored frame is not necessarily interpreted. |
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446 // Use the shared runtime version of the StackOverflowError. |
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447 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated"); |
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448 AddressLiteral stub(StubRoutines::throw_StackOverflowError_entry()); |
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449 __ jump_to(stub, Rscratch); |
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450 __ delayed()->mov(O5_savedSP, SP); |
444 |
451 |
445 // if you get to here, then there is enough stack space |
452 // if you get to here, then there is enough stack space |
446 __ bind( after_frame_check ); |
453 __ bind( after_frame_check ); |
447 } |
454 } |
448 |
455 |