view src/share/vm/opto/c2_globals.hpp @ 2346:e1162778c1c8

7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error Summary: A referent object that is only weakly reachable at the start of concurrent marking but is re-attached to the strongly reachable object graph during marking may not be marked as live. This can cause the reference object to be processed prematurely and leave dangling pointers to the referent object. Implement a read barrier for the java.lang.ref.Reference::referent field by intrinsifying the Reference.get() method, and intercepting accesses though JNI, reflection, and Unsafe, so that when a non-null referent object is read it is also logged in an SATB buffer. Reviewed-by: kvn, iveresov, never, tonyp, dholmes
author johnc
date Thu, 07 Apr 2011 09:53:20 -0700
parents b92c45f2bc75
children 1d1603768966
line wrap: on
line source
/*
 * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

#ifndef SHARE_VM_OPTO_C2_GLOBALS_HPP
#define SHARE_VM_OPTO_C2_GLOBALS_HPP

#include "runtime/globals.hpp"
#ifdef TARGET_ARCH_x86
# include "c2_globals_x86.hpp"
#endif
#ifdef TARGET_ARCH_sparc
# include "c2_globals_sparc.hpp"
#endif
#ifdef TARGET_ARCH_arm
# include "c2_globals_arm.hpp"
#endif
#ifdef TARGET_OS_FAMILY_linux
# include "c2_globals_linux.hpp"
#endif
#ifdef TARGET_OS_FAMILY_solaris
# include "c2_globals_solaris.hpp"
#endif
#ifdef TARGET_OS_FAMILY_windows
# include "c2_globals_windows.hpp"
#endif

//
// Defines all globals flags used by the server compiler.
//

#define C2_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct) \
                                                                            \
  notproduct(intx, CompileZapFirst, 0,                                      \
          "If +ZapDeadCompiledLocals, "                                     \
          "skip this many before compiling in zap calls")                   \
                                                                            \
  notproduct(intx, CompileZapLast, -1,                                      \
          "If +ZapDeadCompiledLocals, "                                     \
          "compile this many after skipping (incl. skip count, -1 = all)")  \
                                                                            \
  notproduct(intx, ZapDeadCompiledLocalsFirst, 0,                           \
          "If +ZapDeadCompiledLocals, "                                     \
          "skip this many before really doing it")                          \
                                                                            \
  notproduct(intx, ZapDeadCompiledLocalsLast, -1,                           \
          "If +ZapDeadCompiledLocals, "                                     \
          "do this many after skipping (incl. skip count, -1 = all)")       \
                                                                            \
  develop(intx, OptoPrologueNops, 0,                                        \
          "Insert this many extra nop instructions "                        \
          "in the prologue of every nmethod")                               \
                                                                            \
  product_pd(intx, InteriorEntryAlignment,                                  \
          "Code alignment for interior entry points "                       \
          "in generated code (in bytes)")                                   \
                                                                            \
  product(intx, MaxLoopPad, (OptoLoopAlignment-1),                          \
          "Align a loop if padding size in bytes is less or equal to this value") \
                                                                            \
  product(intx, NumberOfLoopInstrToAlign, 4,                                \
          "Number of first instructions in a loop to align")                \
                                                                            \
  notproduct(intx, IndexSetWatch, 0,                                        \
          "Trace all operations on this IndexSet (-1 means all, 0 none)")   \
                                                                            \
  develop(intx, OptoNodeListSize, 4,                                        \
          "Starting allocation size of Node_List data structures")          \
                                                                            \
  develop(intx, OptoBlockListSize, 8,                                       \
          "Starting allocation size of Block_List data structures")         \
                                                                            \
  develop(intx, OptoPeepholeAt, -1,                                         \
          "Apply peephole optimizations to this peephole rule")             \
                                                                            \
  notproduct(bool, PrintIdeal, false,                                       \
          "Print ideal graph before code generation")                       \
                                                                            \
  notproduct(bool, PrintOpto, false,                                        \
          "Print compiler2 attempts")                                       \
                                                                            \
  notproduct(bool, PrintOptoInlining, false,                                \
          "Print compiler2 inlining decisions")                             \
                                                                            \
  notproduct(bool, VerifyOpto, false,                                       \
          "Apply more time consuming verification during compilation")      \
                                                                            \
  notproduct(bool, VerifyOptoOopOffsets, false,                             \
          "Check types of base addresses in field references")              \
                                                                            \
  develop(bool, IdealizedNumerics, false,                                   \
          "Check performance difference allowing FP "                       \
          "associativity and commutativity...")                             \
                                                                            \
  develop(bool, OptoBreakpoint, false,                                      \
          "insert breakpoint at method entry")                              \
                                                                            \
  notproduct(bool, OptoBreakpointOSR, false,                                \
          "insert breakpoint at osr method entry")                          \
                                                                            \
  notproduct(intx, BreakAtNode, 0,                                          \
          "Break at construction of this Node (either _idx or _debug_idx)") \
                                                                            \
  notproduct(bool, OptoBreakpointC2R, false,                                \
          "insert breakpoint at runtime stub entry")                        \
                                                                            \
  notproduct(bool, OptoNoExecute, false,                                    \
          "Attempt to parse and compile but do not execute generated code") \
                                                                            \
  notproduct(bool, PrintOptoStatistics, false,                              \
          "Print New compiler statistics")                                  \
                                                                            \
  notproduct(bool, PrintOptoAssembly, false,                                \
          "Print New compiler assembly output")                             \
                                                                            \
  develop_pd(bool, OptoPeephole,                                            \
          "Apply peephole optimizations after register allocation")         \
                                                                            \
  develop(bool, OptoRemoveUseless, true,                                    \
          "Remove useless nodes after parsing")                             \
                                                                            \
  notproduct(bool, PrintFrameConverterAssembly, false,                      \
          "Print New compiler assembly output for frame converters")        \
                                                                            \
  notproduct(bool, PrintParseStatistics, false,                             \
          "Print nodes, transforms and new values made per bytecode parsed")\
                                                                            \
  notproduct(bool, PrintOptoPeephole, false,                                \
          "Print New compiler peephole replacements")                       \
                                                                            \
  develop(bool, PrintCFGBlockFreq, false,                                   \
          "Print CFG block freqencies")                                     \
                                                                            \
  develop(bool, TraceOptoParse, false,                                      \
          "Trace bytecode parse and control-flow merge")                    \
                                                                            \
  product_pd(intx,  LoopUnrollLimit,                                        \
          "Unroll loop bodies with node count less than this")              \
                                                                            \
  product(intx,  LoopUnrollMin, 4,                                          \
          "Minimum number of unroll loop bodies before checking progress"   \
          "of rounds of unroll,optimize,..")                                \
                                                                            \
  develop(intx, UnrollLimitForProfileCheck, 1,                              \
          "Don't use profile_trip_cnt() to restrict unrolling until "       \
          "unrolling would push the number of unrolled iterations above "   \
          "UnrollLimitForProfileCheck. A higher value allows more "         \
          "unrolling. Zero acts as a very large value." )                   \
                                                                            \
  product(intx, MultiArrayExpandLimit, 6,                                   \
          "Maximum number of individual allocations in an inline-expanded " \
          "multianewarray instruction")                                     \
                                                                            \
  notproduct(bool, TraceProfileTripCount, false,                            \
          "Trace profile loop trip count information")                      \
                                                                            \
  product(bool, UseLoopPredicate, true,                                     \
          "Generate a predicate to select fast/slow loop versions")         \
                                                                            \
  develop(bool, TraceLoopPredicate, false,                                  \
          "Trace generation of loop predicates")                            \
                                                                            \
  develop(bool, TraceLoopOpts, false,                                       \
          "Trace executed loop optimizations")                              \
                                                                            \
  product(bool, OptimizeFill, false,                                        \
          "convert fill/copy loops into intrinsic")                         \
                                                                            \
  develop(bool, TraceOptimizeFill, false,                                   \
          "print detailed information about fill conversion")               \
                                                                            \
  develop(bool, OptoCoalesce, true,                                         \
          "Use Conservative Copy Coalescing in the Register Allocator")     \
                                                                            \
  develop(bool, UseUniqueSubclasses, true,                                  \
          "Narrow an abstract reference to the unique concrete subclass")   \
                                                                            \
  develop(bool, UseExactTypes, true,                                        \
          "Use exact types to eliminate array store checks and v-calls")    \
                                                                            \
  product(intx, TrackedInitializationLimit, 50,                             \
          "When initializing fields, track up to this many words")          \
                                                                            \
  product(bool, ReduceFieldZeroing, true,                                   \
          "When initializing fields, try to avoid needless zeroing")        \
                                                                            \
  product(bool, ReduceInitialCardMarks, true,                               \
          "When initializing fields, try to avoid needless card marks")     \
                                                                            \
  product(bool, ReduceBulkZeroing, true,                                    \
          "When bulk-initializing, try to avoid needless zeroing")          \
                                                                            \
  product(bool, UseFPUForSpilling, false,                                   \
          "Spill integer registers to FPU instead of stack when possible")  \
                                                                            \
  develop_pd(intx, RegisterCostAreaRatio,                                   \
          "Spill selection in reg allocator: scale area by (X/64K) before " \
          "adding cost")                                                    \
                                                                            \
  develop_pd(bool, UseCISCSpill,                                            \
          "Use ADLC supplied cisc instructions during allocation")          \
                                                                            \
  notproduct(bool, VerifyGraphEdges , false,                                \
          "Verify Bi-directional Edges")                                    \
                                                                            \
  notproduct(bool, VerifyDUIterators, true,                                 \
          "Verify the safety of all iterations of Bi-directional Edges")    \
                                                                            \
  notproduct(bool, VerifyHashTableKeys, true,                               \
          "Verify the immutability of keys in the VN hash tables")          \
                                                                            \
  notproduct(bool, VerifyRegisterAllocator , false,                         \
          "Verify Register Allocator")                                      \
                                                                            \
  develop_pd(intx, FLOATPRESSURE,                                           \
          "Number of float LRG's that constitute high register pressure")   \
                                                                            \
  develop_pd(intx, INTPRESSURE,                                             \
          "Number of integer LRG's that constitute high register pressure") \
                                                                            \
  notproduct(bool, TraceOptoPipelining, false,                              \
          "Trace pipelining information")                                   \
                                                                            \
  notproduct(bool, TraceOptoOutput, false,                                  \
          "Trace pipelining information")                                   \
                                                                            \
  product_pd(bool, OptoScheduling,                                          \
          "Instruction Scheduling after register allocation")               \
                                                                            \
  product(bool, PartialPeelLoop, true,                                      \
          "Partial peel (rotate) loops")                                    \
                                                                            \
  product(intx, PartialPeelNewPhiDelta, 0,                                  \
          "Additional phis that can be created by partial peeling")         \
                                                                            \
  notproduct(bool, TracePartialPeeling, false,                              \
          "Trace partial peeling (loop rotation) information")              \
                                                                            \
  product(bool, PartialPeelAtUnsignedTests, true,                           \
          "Partial peel at unsigned tests if no signed test exists")        \
                                                                            \
  product(bool, ReassociateInvariants, true,                                \
          "Enable reassociation of expressions with loop invariants.")      \
                                                                            \
  product(bool, LoopUnswitching, true,                                      \
          "Enable loop unswitching (a form of invariant test hoisting)")    \
                                                                            \
  notproduct(bool, TraceLoopUnswitching, false,                             \
          "Trace loop unswitching")                                         \
                                                                            \
  product(bool, UseSuperWord, true,                                         \
          "Transform scalar operations into superword operations")          \
                                                                            \
  develop(bool, SuperWordRTDepCheck, false,                                 \
          "Enable runtime dependency checks.")                              \
                                                                            \
  product(bool, TraceSuperWord, false,                                      \
          "Trace superword transforms")                                     \
                                                                            \
  product_pd(bool, OptoBundling,                                            \
          "Generate nops to fill i-cache lines")                            \
                                                                            \
  product_pd(intx, ConditionalMoveLimit,                                    \
          "Limit of ops to make speculative when using CMOVE")              \
                                                                            \
  /* Set BranchOnRegister == false. See 4965987. */                         \
  product(bool, BranchOnRegister, false,                                    \
          "Use Sparc V9 branch-on-register opcodes")                        \
                                                                            \
  develop(bool, SparcV9RegsHiBitsZero, true,                                \
          "Assume Sparc V9 I&L registers on V8+ systems are zero-extended") \
                                                                            \
  product(bool, UseRDPCForConstantTableBase, false,                         \
          "Use Sparc RDPC instruction for the constant table base.")        \
                                                                            \
  develop(intx, PrintIdealGraphLevel, 0,                                    \
          "Print ideal graph to XML file / network interface. "             \
          "By default attempts to connect to the visualizer on a socket.")  \
                                                                            \
  develop(intx, PrintIdealGraphPort, 4444,                                  \
          "Ideal graph printer to network port")                            \
                                                                            \
  notproduct(ccstr, PrintIdealGraphAddress, "127.0.0.1",                    \
          "IP address to connect to visualizer")                            \
                                                                            \
  notproduct(ccstr, PrintIdealGraphFile, NULL,                              \
          "File to dump ideal graph to.  If set overrides the "             \
          "use of the network")                                             \
                                                                            \
  product(bool, UseOldInlining, true,                                       \
          "Enable the 1.3 inlining strategy")                               \
                                                                            \
  product(bool, UseBimorphicInlining, true,                                 \
          "Profiling based inlining for two receivers")                     \
                                                                            \
  product(bool, UseOnlyInlinedBimorphic, true,                              \
          "Don't use BimorphicInlining if can't inline a second method")    \
                                                                            \
  product(bool, InsertMemBarAfterArraycopy, true,                           \
          "Insert memory barrier after arraycopy call")                     \
                                                                            \
  develop(bool, SubsumeLoads, true,                                         \
          "Attempt to compile while subsuming loads into machine instructions.") \
                                                                            \
  develop(bool, StressRecompilation, false,                                 \
          "Recompile each compiled method without subsuming loads or escape analysis.") \
                                                                            \
  /* controls for tier 1 compilations */                                    \
                                                                            \
  develop(bool, Tier1CountInvocations, true,                                \
          "Generate code, during tier 1, to update invocation counter")     \
                                                                            \
  product(intx, Tier1Inline, false,                                         \
          "enable inlining during tier 1")                                  \
                                                                            \
  product(intx, Tier1MaxInlineSize, 8,                                      \
          "maximum bytecode size of a method to be inlined, during tier 1") \
                                                                            \
  product(intx, Tier1FreqInlineSize, 35,                                    \
          "max bytecode size of a frequent method to be inlined, tier 1")   \
                                                                            \
  develop(intx, ImplicitNullCheckThreshold, 3,                              \
          "Don't do implicit null checks if NPE's in a method exceeds limit") \
                                                                            \
 /* controls for loop optimization */                                       \
  product(intx, Tier1LoopOptsCount, 0,                                      \
          "Set level of loop optimization for tier 1 compiles")             \
                                                                            \
  product(intx, LoopOptsCount, 43,                                          \
          "Set level of loop optimization for tier 1 compiles")             \
                                                                            \
  /* controls for heat-based inlining */                                    \
                                                                            \
  develop(intx, NodeCountInliningCutoff, 18000,                             \
          "If parser node generation exceeds limit stop inlining")          \
                                                                            \
  develop(intx, NodeCountInliningStep, 1000,                                \
          "Target size of warm calls inlined between optimization passes")  \
                                                                            \
  develop(bool, InlineWarmCalls, false,                                     \
          "Use a heat-based priority queue to govern inlining")             \
                                                                            \
  develop(intx, HotCallCountThreshold, 999999,                              \
          "large numbers of calls (per method invocation) force hotness")   \
                                                                            \
  develop(intx, HotCallProfitThreshold, 999999,                             \
          "highly profitable inlining opportunities force hotness")         \
                                                                            \
  develop(intx, HotCallTrivialWork, -1,                                     \
          "trivial execution time (no larger than this) forces hotness")    \
                                                                            \
  develop(intx, HotCallTrivialSize, -1,                                     \
          "trivial methods (no larger than this) force calls to be hot")    \
                                                                            \
  develop(intx, WarmCallMinCount, -1,                                       \
          "number of calls (per method invocation) to enable inlining")     \
                                                                            \
  develop(intx, WarmCallMinProfit, -1,                                      \
          "number of calls (per method invocation) to enable inlining")     \
                                                                            \
  develop(intx, WarmCallMaxWork, 999999,                                    \
          "execution time of the largest inlinable method")                 \
                                                                            \
  develop(intx, WarmCallMaxSize, 999999,                                    \
          "size of the largest inlinable method")                           \
                                                                            \
  product(intx, MaxNodeLimit, 65000,                                        \
          "Maximum number of nodes")                                        \
                                                                            \
  product(intx, NodeLimitFudgeFactor, 1000,                                 \
          "Fudge Factor for certain optimizations")                         \
                                                                            \
  product(bool, UseJumpTables, true,                                        \
          "Use JumpTables instead of a binary search tree for switches")    \
                                                                            \
  product(bool, UseDivMod, true,                                            \
          "Use combined DivMod instruction if available")                   \
                                                                            \
  product(intx, MinJumpTableSize, 18,                                       \
          "Minimum number of targets in a generated jump table")            \
                                                                            \
  product(intx, MaxJumpTableSize, 65000,                                    \
          "Maximum number of targets in a generated jump table")            \
                                                                            \
  product(intx, MaxJumpTableSparseness, 5,                                  \
          "Maximum sparseness for jumptables")                              \
                                                                            \
  product(bool, EliminateLocks, true,                                       \
          "Coarsen locks when possible")                                    \
                                                                            \
  notproduct(bool, PrintLockStatistics, false,                              \
          "Print precise statistics on the dynamic lock usage")             \
                                                                            \
  diagnostic(bool, PrintPreciseBiasedLockingStatistics, false,              \
          "Print per-lock-site statistics of biased locking in JVM")        \
                                                                            \
  notproduct(bool, PrintEliminateLocks, false,                              \
          "Print out when locks are eliminated")                            \
                                                                            \
  diagnostic(bool, EliminateAutoBox, false,                                 \
          "Private flag to control optimizations for autobox elimination")  \
                                                                            \
  product(intx, AutoBoxCacheMax, 128,                                       \
          "Sets max value cached by the java.lang.Integer autobox cache")   \
                                                                            \
  product(bool, DoEscapeAnalysis, true,                                     \
          "Perform escape analysis")                                        \
                                                                            \
  notproduct(bool, PrintEscapeAnalysis, false,                              \
          "Print the results of escape analysis")                           \
                                                                            \
  product(bool, EliminateAllocations, true,                                 \
          "Use escape analysis to eliminate allocations")                   \
                                                                            \
  notproduct(bool, PrintEliminateAllocations, false,                        \
          "Print out when allocations are eliminated")                      \
                                                                            \
  product(intx, EliminateAllocationArraySizeLimit, 64,                      \
          "Array size (number of elements) limit for scalar replacement")   \
                                                                            \
  product(bool, UseOptoBiasInlining, true,                                  \
          "Generate biased locking code in C2 ideal graph")                 \
                                                                            \
  product(bool, OptimizeStringConcat, false,                                \
          "Optimize the construction of Strings by StringBuilder")          \
                                                                            \
  notproduct(bool, PrintOptimizeStringConcat, false,                        \
          "Print information about transformations performed on Strings")   \
                                                                            \
  product(intx, ValueSearchLimit, 1000,                                     \
          "Recursion limit in PhaseMacroExpand::value_from_mem_phi")        \
                                                                            \
  product(intx, MaxLabelRootDepth, 1100,                                    \
          "Maximum times call Label_Root to prevent stack overflow")        \
                                                                            \
  diagnostic(intx, DominatorSearchLimit, 1000,                              \
          "Iterations limit in Node::dominates")                            \
                                                                            \
  product(bool, BlockLayoutByFrequency, true,                               \
          "Use edge frequencies to drive block ordering")                   \
                                                                            \
  product(intx, BlockLayoutMinDiamondPercentage, 20,                        \
          "Miniumum %% of a successor (predecessor) for which block layout "\
          "a will allow a fork (join) in a single chain")                   \
                                                                            \
  product(bool, BlockLayoutRotateLoops, true,                               \
          "Allow back branches to be fall throughs in the block layour")    \

C2_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG)

#endif // SHARE_VM_OPTO_C2_GLOBALS_HPP