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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 63c5920a038d
children f6bde7889409
comparison
equal deleted inserted replaced
17978:ad51f24671c2 17980:0bf37f737702
1 // 1 //
2 // Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved. 2 // Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.
3 // Copyright 2012, 2013 SAP AG. All rights reserved. 3 // Copyright 2012, 2014 SAP AG. All rights reserved.
4 // DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 // DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 // 5 //
6 // This code is free software; you can redistribute it and/or modify it 6 // This code is free software; you can redistribute it and/or modify it
7 // under the terms of the GNU General Public License version 2 only, as 7 // under the terms of the GNU General Public License version 2 only, as
8 // published by the Free Software Foundation. 8 // published by the Free Software Foundation.
1361 1361
1362 void MachPrologNode::emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const { 1362 void MachPrologNode::emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const {
1363 Compile* C = ra_->C; 1363 Compile* C = ra_->C;
1364 MacroAssembler _masm(&cbuf); 1364 MacroAssembler _masm(&cbuf);
1365 1365
1366 const long framesize = ((long)C->frame_slots()) << LogBytesPerInt; 1366 const long framesize = C->frame_size_in_bytes();
1367 assert(framesize%(2*wordSize) == 0, "must preserve 2*wordSize alignment"); 1367 assert(framesize % (2 * wordSize) == 0, "must preserve 2*wordSize alignment");
1368 1368
1369 const bool method_is_frameless = false /* TODO: PPC port C->is_frameless_method()*/; 1369 const bool method_is_frameless = false /* TODO: PPC port C->is_frameless_method()*/;
1370 1370
1371 const Register return_pc = R20; // Must match return_addr() in frame section. 1371 const Register return_pc = R20; // Must match return_addr() in frame section.
1372 const Register callers_sp = R21; 1372 const Register callers_sp = R21;
1387 // Calls to C2R adapters often do not accept exceptional returns. 1387 // Calls to C2R adapters often do not accept exceptional returns.
1388 // We require that their callers must bang for them. But be 1388 // We require that their callers must bang for them. But be
1389 // careful, because some VM calls (such as call site linkage) can 1389 // careful, because some VM calls (such as call site linkage) can
1390 // use several kilobytes of stack. But the stack safety zone should 1390 // use several kilobytes of stack. But the stack safety zone should
1391 // account for that. See bugs 4446381, 4468289, 4497237. 1391 // account for that. See bugs 4446381, 4468289, 4497237.
1392 if (C->need_stack_bang(framesize) && UseStackBanging) { 1392
1393 int bangsize = C->bang_size_in_bytes();
1394 assert(bangsize >= framesize || bangsize <= 0, "stack bang size incorrect");
1395 if (C->need_stack_bang(bangsize) && UseStackBanging) {
1393 // Unfortunately we cannot use the function provided in 1396 // Unfortunately we cannot use the function provided in
1394 // assembler.cpp as we have to emulate the pipes. So I had to 1397 // assembler.cpp as we have to emulate the pipes. So I had to
1395 // insert the code of generate_stack_overflow_check(), see 1398 // insert the code of generate_stack_overflow_check(), see
1396 // assembler.cpp for some illuminative comments. 1399 // assembler.cpp for some illuminative comments.
1397 const int page_size = os::vm_page_size(); 1400 const int page_size = os::vm_page_size();
1398 int bang_end = StackShadowPages*page_size; 1401 int bang_end = StackShadowPages * page_size;
1399 1402
1400 // This is how far the previous frame's stack banging extended. 1403 // This is how far the previous frame's stack banging extended.
1401 const int bang_end_safe = bang_end; 1404 const int bang_end_safe = bang_end;
1402 1405
1403 if (framesize > page_size) { 1406 if (bangsize > page_size) {
1404 bang_end += framesize; 1407 bang_end += bangsize;
1405 } 1408 }
1406 1409
1407 int bang_offset = bang_end_safe; 1410 int bang_offset = bang_end_safe;
1408 1411
1409 while (bang_offset <= bang_end) { 1412 while (bang_offset <= bang_end) {
1445 // R11 trashed 1448 // R11 trashed
1446 } // C->need_stack_bang(framesize) && UseStackBanging 1449 } // C->need_stack_bang(framesize) && UseStackBanging
1447 1450
1448 unsigned int bytes = (unsigned int)framesize; 1451 unsigned int bytes = (unsigned int)framesize;
1449 long offset = Assembler::align_addr(bytes, frame::alignment_in_bytes); 1452 long offset = Assembler::align_addr(bytes, frame::alignment_in_bytes);
1450 ciMethod *currMethod = C -> method(); 1453 ciMethod *currMethod = C->method();
1451 1454
1452 // Optimized version for most common case. 1455 // Optimized version for most common case.
1453 if (UsePower6SchedulerPPC64 && 1456 if (UsePower6SchedulerPPC64 &&
1454 !method_is_frameless && Assembler::is_simm((int)(-offset), 16) && 1457 !method_is_frameless && Assembler::is_simm((int)(-offset), 16) &&
1455 !(false /* ConstantsALot TODO: PPC port*/)) { 1458 !(false /* ConstantsALot TODO: PPC port*/)) {