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org.jikesrvm.ia32
Class LazyCompilationTrampoline

java.lang.Object
  extended by org.jikesrvm.ia32.LazyCompilationTrampoline
All Implemented Interfaces:
Constants, HeapLayoutConstants, ArchConstants, BaselineConstants, RegisterConstants, StackframeLayoutConstants, TrapConstants, ThinLockConstants, TIBLayoutConstants, SizeConstants
Direct Known Subclasses:
ArchitectureSpecific.LazyCompilationTrampoline
public abstract class LazyCompilationTrampoline
extends Object
implements BaselineConstants

Generate a "trampoline" that jumps to the shared lazy compilation stub. This is then copied into individual TIBs.

We do this to enable the optimizing compiler to use ptr equality of target instructions to imply logical (source) equality of target methods. This is used to perform guarded inlining using the "method test." Without per-class lazy compilation trampolines, ptr equality of target instructions does not imply source equality, since both targets may in fact be the globally shared lazy compilation stub.

Nested Class Summary
 
Nested classes/interfaces inherited from interface org.jikesrvm.ia32.RegisterConstants
RegisterConstants.FloatingPointMachineRegister, RegisterConstants.FPR, RegisterConstants.GPR, RegisterConstants.MachineRegister, RegisterConstants.MM, RegisterConstants.XMM
 
Field Summary
static ArchitectureSpecific.CodeArray instructions
           
 
Fields inherited from interface org.jikesrvm.ia32.BaselineConstants
BRIDGE_FRAME_EXTRA_SIZE, EBP_SAVE_OFFSET, EBX_SAVE_OFFSET, EDI_SAVE_OFFSET, FPU_SAVE_OFFSET, LG_WORDSIZE, S0, S1, SAVED_GPRS, SAVED_GPRS_FOR_SAVE_LS_REGISTERS, SP, STACKFRAME_FIRST_PARAMETER_OFFSET, STACKFRAME_REG_SAVE_OFFSET, T0, T0_int, T0_SAVE_OFFSET, T1, T1_int, T1_SAVE_OFFSET, TR, WORDSIZE, XMM_SAVE_OFFSET
 
Fields inherited from interface org.jikesrvm.Constants
NOT_REACHED, REFLECTION_FPRS_BITS, REFLECTION_FPRS_MASK, REFLECTION_GPRS_BITS, REFLECTION_GPRS_MASK
 
Fields inherited from interface org.jikesrvm.objectmodel.ThinLockConstants
TL_DEDICATED_U16_OFFSET, TL_DEDICATED_U16_SHIFT, TL_LOCK_COUNT_MASK, TL_LOCK_COUNT_SHIFT, TL_LOCK_COUNT_UNIT, TL_LOCK_ID_MASK, TL_LOCK_ID_SHIFT, TL_NUM_BITS_RC, TL_NUM_BITS_STAT, TL_NUM_BITS_TID, TL_STAT_BIASABLE, TL_STAT_FAT, TL_STAT_MASK, TL_STAT_SHIFT, TL_STAT_THIN, TL_THREAD_ID_MASK, TL_THREAD_ID_SHIFT, TL_UNLOCK_MASK
 
Fields inherited from interface org.jikesrvm.SizeConstants
BITS_IN_ADDRESS, BITS_IN_BOOLEAN, BITS_IN_BYTE, BITS_IN_CHAR, BITS_IN_DOUBLE, BITS_IN_EXTENT, BITS_IN_FLOAT, BITS_IN_INT, BITS_IN_LONG, BITS_IN_OFFSET, BITS_IN_PAGE, BITS_IN_SHORT, BITS_IN_WORD, BYTES_IN_ADDRESS, BYTES_IN_BOOLEAN, BYTES_IN_BYTE, BYTES_IN_CHAR, BYTES_IN_DOUBLE, BYTES_IN_EXTENT, BYTES_IN_FLOAT, BYTES_IN_INT, BYTES_IN_LONG, BYTES_IN_OFFSET, BYTES_IN_PAGE, BYTES_IN_SHORT, BYTES_IN_WORD, LOG_BITS_IN_ADDRESS, LOG_BITS_IN_BOOLEAN, LOG_BITS_IN_BYTE, LOG_BITS_IN_CHAR, LOG_BITS_IN_DOUBLE, LOG_BITS_IN_EXTENT, LOG_BITS_IN_FLOAT, LOG_BITS_IN_INT, LOG_BITS_IN_LONG, LOG_BITS_IN_OFFSET, LOG_BITS_IN_PAGE, LOG_BITS_IN_SHORT, LOG_BITS_IN_WORD, LOG_BYTES_IN_ADDRESS, LOG_BYTES_IN_BOOLEAN, LOG_BYTES_IN_BYTE, LOG_BYTES_IN_CHAR, LOG_BYTES_IN_DOUBLE, LOG_BYTES_IN_EXTENT, LOG_BYTES_IN_FLOAT, LOG_BYTES_IN_INT, LOG_BYTES_IN_LONG, LOG_BYTES_IN_OFFSET, LOG_BYTES_IN_PAGE, LOG_BYTES_IN_SHORT, LOG_BYTES_IN_WORD
 
Fields inherited from interface org.jikesrvm.objectmodel.TIBLayoutConstants
IMT_METHOD_SLOTS, NEEDS_DYNAMIC_LINK, TIB_ARRAY_ELEMENT_TIB_INDEX, TIB_DOES_IMPLEMENT_INDEX, TIB_FIRST_SPECIALIZED_METHOD_INDEX, TIB_FIRST_VIRTUAL_METHOD_INDEX, TIB_INTERFACE_DISPATCH_TABLE_INDEX, TIB_SUPERCLASS_IDS_INDEX, TIB_TYPE_INDEX
 
Fields inherited from interface org.jikesrvm.HeapLayoutConstants
BAD_MAP_COMPRESSION, BOOT_IMAGE_CODE_END, BOOT_IMAGE_CODE_SIZE, BOOT_IMAGE_CODE_START, BOOT_IMAGE_DATA_END, BOOT_IMAGE_DATA_SIZE, BOOT_IMAGE_DATA_START, BOOT_IMAGE_END, BOOT_IMAGE_RMAP_END, BOOT_IMAGE_RMAP_START, MAX_BOOT_IMAGE_RMAP_SIZE, MAXIMUM_MAPPABLE
 
Fields inherited from interface org.jikesrvm.ia32.ArchConstants
SSE2_BASE, SSE2_FULL
 
Fields inherited from interface org.jikesrvm.ia32.StackframeLayoutConstants
BYTES_IN_STACKSLOT, FPU_STATE_SIZE, INVISIBLE_METHOD_ID, LOG_BYTES_IN_STACKSLOT, STACK_SIZE_BOOT, STACK_SIZE_COLLECTOR, STACK_SIZE_DLOPEN, STACK_SIZE_GCDISABLED, STACK_SIZE_GROW, STACK_SIZE_GUARD, STACK_SIZE_JNINATIVE_GROW, STACK_SIZE_MAX, STACK_SIZE_NORMAL, STACK_SIZE_SYSCALL, STACKFRAME_ALIGNMENT, STACKFRAME_BODY_OFFSET, STACKFRAME_FRAME_POINTER_OFFSET, STACKFRAME_HEADER_SIZE, STACKFRAME_METHOD_ID_OFFSET, STACKFRAME_RETURN_ADDRESS_OFFSET, STACKFRAME_SENTINEL_FP, XMM_STATE_SIZE
 
Fields inherited from interface org.jikesrvm.ia32.RegisterConstants
ALL_FPRS, ALL_GPRS, EAX, EBP, EBX, ECX, EDI, EDX, ESI, ESP, FP0, FP1, FP2, FP3, FP4, FP5, FP6, FP7, INSTRUCTION_WIDTH, LG_INSTRUCTION_WIDTH, MM0, MM1, MM10, MM11, MM12, MM13, MM14, MM15, MM2, MM3, MM4, MM5, MM6, MM7, MM8, MM9, NATIVE_NONVOLATILE_FPRS, NATIVE_NONVOLATILE_GPRS, NATIVE_PARAMETER_FPRS, NATIVE_PARAMETER_GPRS, NATIVE_VOLATILE_FPRS, NATIVE_VOLATILE_GPRS, NONVOLATILE_FPRS, NONVOLATILE_GPRS, NUM_FPRS, NUM_GPRS, NUM_NONVOLATILE_FPRS, NUM_NONVOLATILE_GPRS, NUM_PARAMETER_FPRS, NUM_PARAMETER_GPRS, NUM_RETURN_FPRS, NUM_RETURN_GPRS, NUM_VOLATILE_FPRS, NUM_VOLATILE_GPRS, PARAMETER_FPRS, PARAMETER_GPRS, R0, R1, R10, R11, R12, R13, R14, R15, R2, R3, R4, R5, R6, R7, R8, R9, RETURN_FPRS, RETURN_GPRS, STACK_POINTER, THREAD_REGISTER, VOLATILE_FPRS, VOLATILE_GPRS, XMM0, XMM1, XMM10, XMM11, XMM12, XMM13, XMM14, XMM15, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7, XMM8, XMM9
 
Fields inherited from interface org.jikesrvm.ia32.TrapConstants
RVM_TRAP_BASE
 
Constructor Summary
LazyCompilationTrampoline()
           
 
Method Summary
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

instructions

public static final ArchitectureSpecific.CodeArray instructions
Constructor Detail

LazyCompilationTrampoline

public LazyCompilationTrampoline()
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