com.newrelic.agent.instrumentation.tracing

Class FlyweightTraceMethodVisitor

java.lang.Object

org.objectweb.asm.MethodVisitor

org.objectweb.asm.commons.LocalVariablesSorter

org.objectweb.asm.commons.GeneratorAdapter

org.objectweb.asm.commons.AdviceAdapter

com.newrelic.agent.instrumentation.tracing.FlyweightTraceMethodVisitor

All Implemented Interfaces:

org.objectweb.asm.Opcodes

public class FlyweightTraceMethodVisitor
extends org.objectweb.asm.commons.AdviceAdapter

Flyweight timers can be created when an instrumented method doesn't participate in transaction traces and is a leaf (no children). Instead of creating a Tracer object, we create local variables to store the timing information and the details of the traced method.

See Also:

Transaction.startFlyweightTracer(), Transaction.finishFlyweightTracer(TracedMethod, long, long, String, String, String, String, String[])

Field Summary

Fields inherited from class org.objectweb.asm.commons.AdviceAdapter

methodAccess, methodDesc

Fields inherited from class org.objectweb.asm.commons.GeneratorAdapter

ADD, AND, DIV, EQ, GE, GT, LE, LT, MUL, NE, NEG, OR, REM, SHL, SHR, SUB, USHR, XOR

Fields inherited from class org.objectweb.asm.commons.LocalVariablesSorter

firstLocal, nextLocal

Fields inherited from class org.objectweb.asm.MethodVisitor

api, mv

Fields inherited from interface org.objectweb.asm.Opcodes

AALOAD, AASTORE, ACC_ABSTRACT, ACC_ANNOTATION, ACC_BRIDGE, ACC_DEPRECATED, ACC_ENUM, ACC_FINAL, ACC_INTERFACE, ACC_MANDATED, ACC_MODULE, ACC_NATIVE, ACC_OPEN, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_RECORD, ACC_STATIC, ACC_STATIC_PHASE, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_TRANSITIVE, ACC_VARARGS, ACC_VOLATILE, ACONST_NULL, ALOAD, ANEWARRAY, ARETURN, ARRAYLENGTH, ASM10_EXPERIMENTAL, ASM4, ASM5, ASM6, ASM7, ASM8, ASM9, ASTORE, ATHROW, BALOAD, BASTORE, BIPUSH, CALOAD, CASTORE, CHECKCAST, D2F, D2I, D2L, DADD, DALOAD, DASTORE, DCMPG, DCMPL, DCONST_0, DCONST_1, DDIV, DLOAD, DMUL, DNEG, DOUBLE, DREM, DRETURN, DSTORE, DSUB, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, F_APPEND, F_CHOP, F_FULL, F_NEW, F_SAME, F_SAME1, F2D, F2I, F2L, FADD, FALOAD, FASTORE, FCMPG, FCMPL, FCONST_0, FCONST_1, FCONST_2, FDIV, FLOAD, FLOAT, FMUL, FNEG, FREM, FRETURN, FSTORE, FSUB, GETFIELD, GETSTATIC, GOTO, H_GETFIELD, H_GETSTATIC, H_INVOKEINTERFACE, H_INVOKESPECIAL, H_INVOKESTATIC, H_INVOKEVIRTUAL, H_NEWINVOKESPECIAL, H_PUTFIELD, H_PUTSTATIC, I2B, I2C, I2D, I2F, I2L, I2S, IADD, IALOAD, IAND, IASTORE, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, ICONST_M1, IDIV, IF_ACMPEQ, IF_ACMPNE, IF_ICMPEQ, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ICMPLT, IF_ICMPNE, IFEQ, IFGE, IFGT, IFLE, IFLT, IFNE, IFNONNULL, IFNULL, IINC, ILOAD, IMUL, INEG, INSTANCEOF, INTEGER, INVOKEDYNAMIC, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL, IOR, IREM, IRETURN, ISHL, ISHR, ISTORE, ISUB, IUSHR, IXOR, JSR, L2D, L2F, L2I, LADD, LALOAD, LAND, LASTORE, LCMP, LCONST_0, LCONST_1, LDC, LDIV, LLOAD, LMUL, LNEG, LONG, LOOKUPSWITCH, LOR, LREM, LRETURN, LSHL, LSHR, LSTORE, LSUB, LUSHR, LXOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, NULL, POP, POP2, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, SOURCE_DEPRECATED, SOURCE_MASK, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, TOP, V_PREVIEW, V1_1, V1_2, V1_3, V1_4, V1_5, V1_6, V1_7, V1_8, V10, V11, V12, V13, V14, V15, V16, V17, V18, V19, V20, V21, V22, V23, V24, V9

Constructor Summary

Constructors

Constructor and Description
FlyweightTraceMethodVisitor(java.lang.String className, org.objectweb.asm.MethodVisitor mv, int access, java.lang.String name, java.lang.String desc, TraceDetails trace, java.lang.Class<?> classBeingRedefined)

Method Summary

Modifier and Type	Method and Description
protected void	onMethodEnter()
protected void	onMethodExit(int opcode)
void	visitFieldInsn(int opcode, java.lang.String owner, java.lang.String name, java.lang.String desc) Remove references to any fields in TracedMethod.
void	visitMaxs(int maxStack, int maxLocals)
void	visitMethodInsn(int opcode, java.lang.String owner, java.lang.String name, java.lang.String desc, boolean itf) Replace invocations of TracerMethod methods with instructions with store and load local variables.

Methods inherited from class org.objectweb.asm.commons.AdviceAdapter

visitCode, visitInsn, visitIntInsn, visitInvokeDynamicInsn, visitJumpInsn, visitLabel, visitLdcInsn, visitLookupSwitchInsn, visitMultiANewArrayInsn, visitTableSwitchInsn, visitTryCatchBlock, visitTypeInsn, visitVarInsn

Methods inherited from class org.objectweb.asm.commons.GeneratorAdapter

arrayLength, arrayLoad, arrayStore, box, cast, catchException, checkCast, dup, dup2, dup2X1, dup2X2, dupX1, dupX2, endMethod, getAccess, getArgumentTypes, getField, getLocalType, getName, getReturnType, getStatic, goTo, ifCmp, ifICmp, ifNonNull, ifNull, ifZCmp, iinc, instanceOf, invokeConstructor, invokeDynamic, invokeInterface, invokeStatic, invokeVirtual, loadArg, loadArgArray, loadArgs, loadArgs, loadLocal, loadLocal, loadThis, mark, mark, math, monitorEnter, monitorExit, newArray, newInstance, newLabel, not, pop, pop2, push, push, push, push, push, push, push, push, push, putField, putStatic, ret, returnValue, setLocalType, storeArg, storeLocal, storeLocal, swap, swap, tableSwitch, tableSwitch, throwException, throwException, unbox, valueOf

Methods inherited from class org.objectweb.asm.commons.LocalVariablesSorter

newLocal, newLocalMapping, updateNewLocals, visitFrame, visitIincInsn, visitLocalVariable, visitLocalVariableAnnotation

Methods inherited from class org.objectweb.asm.MethodVisitor

getDelegate, visitAnnotableParameterCount, visitAnnotation, visitAnnotationDefault, visitAttribute, visitEnd, visitInsnAnnotation, visitLineNumber, visitMethodInsn, visitParameter, visitParameterAnnotation, visitTryCatchAnnotation, visitTypeAnnotation

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FlyweightTraceMethodVisitor

public FlyweightTraceMethodVisitor(java.lang.String className,
                                   org.objectweb.asm.MethodVisitor mv,
                                   int access,
                                   java.lang.String name,
                                   java.lang.String desc,
                                   TraceDetails trace,
                                   java.lang.Class<?> classBeingRedefined)

Method Detail

onMethodEnter

protected void onMethodEnter()

Overrides:

onMethodEnter in class org.objectweb.asm.commons.AdviceAdapter

See Also:

Transaction.startFlyweightTracer()

visitMaxs

public void visitMaxs(int maxStack,
                      int maxLocals)

Overrides:

visitMaxs in class org.objectweb.asm.commons.LocalVariablesSorter

onMethodExit

protected void onMethodExit(int opcode)

Overrides:

onMethodExit in class org.objectweb.asm.commons.AdviceAdapter

visitFieldInsn

public void visitFieldInsn(int opcode,
                           java.lang.String owner,
                           java.lang.String name,
                           java.lang.String desc)

Remove references to any fields in TracedMethod. This field was removed from our api so we remove references to it to support old weave modules written outside of the agent.

Overrides:

visitFieldInsn in class org.objectweb.asm.commons.AdviceAdapter

visitMethodInsn

public void visitMethodInsn(int opcode,
                            java.lang.String owner,
                            java.lang.String name,
                            java.lang.String desc,
                            boolean itf)

Replace invocations of TracerMethod methods with instructions with store and load local variables. Also ignore calls to Agent.getTracedMethod().

Overrides:

visitMethodInsn in class org.objectweb.asm.commons.AdviceAdapter