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Example 6 with PUTFIELD

use of org.apache.bcel.generic.PUTFIELD in project jop by jop-devel.

the class ObjectCacheAnalysis method getHandleType.

public static String getHandleType(WCETTool project, ControlFlowGraph cfg, InstructionHandle ih) {
    ConstantPoolGen constPool = cfg.getMethodInfo().getConstantPoolGen();
    Instruction instr = ih.getInstruction();
    if (instr instanceof GETFIELD) {
        GETFIELD gf = (GETFIELD) instr;
        ReferenceType refty = gf.getReferenceType(constPool);
        return refty.toString();
    }
    if (!ALL_HANDLE_ACCESSES)
        return null;
    if (instr instanceof PUTFIELD) {
        PUTFIELD pf = (PUTFIELD) instr;
        ReferenceType refty = pf.getReferenceType(constPool);
        return refty.toString();
    }
    if (instr instanceof ArrayInstruction) {
        //ArrayInstruction ainstr = (ArrayInstruction) instr;
        return "[]";
    }
    if (instr instanceof ARRAYLENGTH) {
        //ARRAYLENGTH ainstr = (ARRAYLENGTH) instr;
        return "[]";
    }
    if (instr instanceof INVOKEINTERFACE || instr instanceof INVOKEVIRTUAL) {
        return "$header";
    }
    return null;
}
Also used : ConstantPoolGen(org.apache.bcel.generic.ConstantPoolGen) GETFIELD(org.apache.bcel.generic.GETFIELD) ArrayInstruction(org.apache.bcel.generic.ArrayInstruction) ARRAYLENGTH(org.apache.bcel.generic.ARRAYLENGTH) INVOKEINTERFACE(org.apache.bcel.generic.INVOKEINTERFACE) PUTFIELD(org.apache.bcel.generic.PUTFIELD) Instruction(org.apache.bcel.generic.Instruction) FieldInstruction(org.apache.bcel.generic.FieldInstruction) ArrayInstruction(org.apache.bcel.generic.ArrayInstruction) ReferenceType(org.apache.bcel.generic.ReferenceType) INVOKEVIRTUAL(org.apache.bcel.generic.INVOKEVIRTUAL)

Example 7 with PUTFIELD

use of org.apache.bcel.generic.PUTFIELD in project jop by jop-devel.

the class ReplaceNativeAndCPIdx method replace.

private Method replace(Method method) {
    MethodGen mg = new MethodGen(method, clazz.getClassName(), cpoolgen);
    InstructionList il = mg.getInstructionList();
    InstructionFinder f = new InstructionFinder(il);
    String methodId = method.getName() + method.getSignature();
    OldMethodInfo mi = getCli().getMethodInfo(methodId);
    // find invokes first and replace call to Native by
    // JOP native instructions.
    String invokeStr = "InvokeInstruction";
    for (Iterator i = f.search(invokeStr); i.hasNext(); ) {
        InstructionHandle[] match = (InstructionHandle[]) i.next();
        InstructionHandle first = match[0];
        InvokeInstruction ii = (InvokeInstruction) first.getInstruction();
        if (ii.getClassName(cpoolgen).equals(JOPizer.nativeClass)) {
            short opid = (short) JopInstr.getNative(ii.getMethodName(cpoolgen));
            if (opid == -1) {
                System.err.println(method.getName() + ": cannot locate " + ii.getMethodName(cpoolgen) + ". Replacing with NOP.");
                first.setInstruction(new NOP());
            } else {
                first.setInstruction(new NativeInstruction(opid, (short) 1));
                ((JOPizer) ai).outTxt.println("\t" + first.getPosition());
                // then we remove pc+2 and pc+1 from the MGCI info
                if (JOPizer.dumpMgci) {
                    il.setPositions();
                    int pc = first.getPosition();
                    // important: take the high one first
                    GCRTMethodInfo.removePC(pc + 2, mi);
                    GCRTMethodInfo.removePC(pc + 1, mi);
                }
            }
        }
        if (ii instanceof INVOKESPECIAL) {
            // not an initializer
            if (!ii.getMethodName(cpoolgen).equals("<init>")) {
                // check if this is a super invoke
                // TODO this is just a hack, use InvokeSite.isInvokeSuper() when this is ported to the new framework!
                boolean isSuper = false;
                String declaredType = ii.getClassName(cpoolgen);
                JopClassInfo cls = getCli();
                OldClassInfo superClass = cls.superClass;
                while (superClass != null) {
                    if (superClass.clazz.getClassName().equals(declaredType)) {
                        isSuper = true;
                        break;
                    }
                    if ("java.lang.Object".equals(superClass.clazz.getClassName())) {
                        break;
                    }
                    superClass = superClass.superClass;
                }
                if (isSuper) {
                    Integer idx = ii.getIndex();
                    int new_index = getCli().cpoolUsed.indexOf(idx) + 1;
                    first.setInstruction(new JOPSYS_INVOKESUPER((short) new_index));
                // System.err.println("invokesuper "+ii.getClassName(cpoolgen)+"."+ii.getMethodName(cpoolgen));
                }
            }
        }
    }
    if (JOPizer.CACHE_INVAL) {
        f = new InstructionFinder(il);
        // find volatile reads and insert cache invalidation bytecode
        String fieldInstr = "GETFIELD|GETSTATIC|PUTFIELD|PUTSTATIC";
        for (Iterator i = f.search(fieldInstr); i.hasNext(); ) {
            InstructionHandle[] match = (InstructionHandle[]) i.next();
            InstructionHandle ih = match[0];
            FieldInstruction fi = (FieldInstruction) ih.getInstruction();
            JavaClass jc = JOPizer.jz.cliMap.get(fi.getClassName(cpoolgen)).clazz;
            Field field = null;
            while (field == null) {
                Field[] fields = jc.getFields();
                for (int k = 0; k < fields.length; k++) {
                    if (fields[k].getName().equals(fi.getFieldName(cpoolgen))) {
                        field = fields[k];
                        break;
                    }
                }
                if (field == null) {
                    try {
                        jc = jc.getSuperClass();
                    } catch (ClassNotFoundException e) {
                        e.printStackTrace();
                        throw new Error();
                    }
                }
            }
            if (field.isVolatile()) {
                if (field.getType().getSize() < 2) {
                    if (fi instanceof GETFIELD || fi instanceof GETSTATIC) {
                        ih.setInstruction(new InvalidateInstruction());
                        ih = il.append(ih, fi);
                    }
                } else {
                    // this only works because we do not throw a
                    // NullPointerException for monitorenter/-exit!
                    ih.setInstruction(new ACONST_NULL());
                    ih = il.append(ih, new MONITORENTER());
                    ih = il.append(ih, fi);
                    ih = il.append(ih, new ACONST_NULL());
                    ih = il.append(ih, new MONITOREXIT());
                }
            }
        }
    }
    f = new InstructionFinder(il);
    // find instructions that access the constant pool
    // and replace the index by the new value from ClassInfo
    String cpInstr = "CPInstruction";
    for (Iterator it = f.search(cpInstr); it.hasNext(); ) {
        InstructionHandle[] match = (InstructionHandle[]) it.next();
        InstructionHandle ih = match[0];
        CPInstruction cpii = (CPInstruction) ih.getInstruction();
        int index = cpii.getIndex();
        // we have to grab the information before we change
        // the CP index.
        FieldInstruction fi = null;
        Type ft = null;
        if (cpii instanceof FieldInstruction) {
            fi = (FieldInstruction) ih.getInstruction();
            ft = fi.getFieldType(cpoolgen);
        }
        Integer idx = new Integer(index);
        // pos is the new position in the reduced constant pool
        // idx is the position in the 'original' unresolved cpool
        int pos = getCli().cpoolUsed.indexOf(idx);
        int new_index = pos + 1;
        // and putfield and by address for getstatic and putstatic
        if (cpii instanceof GETFIELD || cpii instanceof PUTFIELD || cpii instanceof GETSTATIC || cpii instanceof PUTSTATIC) {
            // we use the offset instead of the CP index
            new_index = getFieldOffset(cp, index);
        } else {
            if (pos == -1) {
                System.out.println("Error: constant " + index + " " + cpoolgen.getConstant(index) + " not found");
                System.out.println("new cpool: " + getCli().cpoolUsed);
                System.out.println("original cpool: " + cpoolgen);
                System.exit(-1);
            }
        }
        // set new index, position starts at
        // 1 as cp points to the length of the pool
        cpii.setIndex(new_index);
        if (cpii instanceof FieldInstruction) {
            boolean isRef = ft instanceof ReferenceType;
            boolean isLong = ft == BasicType.LONG || ft == BasicType.DOUBLE;
            if (fi instanceof GETSTATIC) {
                if (isRef) {
                    ih.setInstruction(new GETSTATIC_REF((short) new_index));
                } else if (isLong) {
                    ih.setInstruction(new GETSTATIC_LONG((short) new_index));
                }
            } else if (fi instanceof PUTSTATIC) {
                if (isRef) {
                    if (!com.jopdesign.build.JOPizer.USE_RTTM) {
                        ih.setInstruction(new PUTSTATIC_REF((short) new_index));
                    }
                } else if (isLong) {
                    ih.setInstruction(new PUTSTATIC_LONG((short) new_index));
                }
            } else if (fi instanceof GETFIELD) {
                if (isRef) {
                    ih.setInstruction(new GETFIELD_REF((short) new_index));
                } else if (isLong) {
                    ih.setInstruction(new GETFIELD_LONG((short) new_index));
                }
            } else if (fi instanceof PUTFIELD) {
                if (isRef) {
                    if (!com.jopdesign.build.JOPizer.USE_RTTM) {
                        ih.setInstruction(new PUTFIELD_REF((short) new_index));
                    }
                } else if (isLong) {
                    ih.setInstruction(new PUTFIELD_LONG((short) new_index));
                }
            }
        }
    }
    Method m = mg.getMethod();
    il.dispose();
    return m;
}
Also used : InstructionList(org.apache.bcel.generic.InstructionList) InstructionFinder(org.apache.bcel.util.InstructionFinder) MONITORENTER(org.apache.bcel.generic.MONITORENTER) MethodGen(org.apache.bcel.generic.MethodGen) InstructionHandle(org.apache.bcel.generic.InstructionHandle) ReferenceType(org.apache.bcel.generic.ReferenceType) PUTSTATIC(org.apache.bcel.generic.PUTSTATIC) Field(org.apache.bcel.classfile.Field) CPInstruction(org.apache.bcel.generic.CPInstruction) Iterator(java.util.Iterator) MONITOREXIT(org.apache.bcel.generic.MONITOREXIT) ACONST_NULL(org.apache.bcel.generic.ACONST_NULL) PUTFIELD(org.apache.bcel.generic.PUTFIELD) Method(org.apache.bcel.classfile.Method) INVOKESPECIAL(org.apache.bcel.generic.INVOKESPECIAL) NOP(org.apache.bcel.generic.NOP) InvokeInstruction(org.apache.bcel.generic.InvokeInstruction) GETFIELD(org.apache.bcel.generic.GETFIELD) ReferenceType(org.apache.bcel.generic.ReferenceType) Type(org.apache.bcel.generic.Type) BasicType(org.apache.bcel.generic.BasicType) ConstantNameAndType(org.apache.bcel.classfile.ConstantNameAndType) JavaClass(org.apache.bcel.classfile.JavaClass) FieldInstruction(org.apache.bcel.generic.FieldInstruction) GETSTATIC(org.apache.bcel.generic.GETSTATIC)

Example 8 with PUTFIELD

use of org.apache.bcel.generic.PUTFIELD in project jop by jop-devel.

the class SimpleInliner method analyzeInvokee.

/**
     * @param cs the callstring from the invoker to the invoke to inline (if recursive). Used to check DFA results.
     * @param invokee the invoked method to analyze
     * @param inlineData the map to populate with the parameters and the instructions to inline.
     * @return true if inlining is possible
     */
private boolean analyzeInvokee(CallString cs, MethodInfo invokee, InlineData inlineData) {
    // we allow loading of parameters, loading of constants, some instruction, and a return
    ValueMapAnalysis values = new ValueMapAnalysis(invokee);
    values.loadParameters();
    InstructionList il = invokee.getCode().getInstructionList(true, false);
    InstructionHandle ih = il.getStart();
    // we should at least have a return instruction, so even for empty methods we should fall through
    // generate the parameter mapping
    int count = 0;
    while (true) {
        Instruction instruction = ih.getInstruction();
        if (instruction instanceof PushInstruction || instruction instanceof NOP) {
            values.transfer(instruction);
            ih = ih.getNext();
            count++;
        } else {
            break;
        }
    }
    // store the mapping
    for (ValueInfo value : values.getValueTable().getStack()) {
        inlineData.addParam(value);
    }
    inlineData.setInlineStart(count);
    // if we do not need an NP check, we can also inline code which does not throw an exception in the same way
    boolean needsNPCheck = helper.needsNullpointerCheck(cs, invokee, false);
    boolean hasNPCheck = false;
    // we allow up to 5 instructions and one return before assuming that the resulting code will be too large
    for (int i = 0; i < 6; i++) {
        // now lets see what we have here as non-push instructions
        Instruction instruction = ih.getInstruction();
        if (instruction instanceof InvokeInstruction) {
            if (inlineData.getInvokeSite() != null) {
                // only inline at most one invoke
                return false;
            }
            InvokeSite is = invokee.getCode().getInvokeSite(ih);
            inlineData.setInvokeSite(is);
            hasNPCheck |= !is.isInvokeStatic();
        } else if (instruction instanceof FieldInstruction) {
            if (instruction instanceof GETFIELD) {
                hasNPCheck |= values.getValueTable().top().isThisReference();
            }
            if (instruction instanceof PUTFIELD) {
                int down = values.getValueTable().top().isContinued() ? 2 : 1;
                hasNPCheck |= values.getValueTable().top(down).isThisReference();
            }
        } else if (instruction instanceof ArithmeticInstruction || instruction instanceof ConversionInstruction || instruction instanceof StackInstruction || instruction instanceof LDC || instruction instanceof LDC2_W || instruction instanceof ARRAYLENGTH || instruction instanceof CHECKCAST || instruction instanceof NOP) {
        // nothing to do, just copy them
        } else if (instruction instanceof ReturnInstruction) {
            if (needsNPCheck && !hasNPCheck) {
                // We were nearly finished.. but NP check test failed
                this.requiresNPCheck++;
                if (logger.isTraceEnabled()) {
                    logger.trace("Not inlining " + invokee + " because it requires a NP check.");
                }
                return false;
            }
            // else we need to add pop instructions
            if (instruction instanceof RETURN) {
                // we do not return anything, so we must empty the stack
                while (values.getValueTable().getStackSize() > 0) {
                    Instruction pop;
                    if (values.getValueTable().top().isContinued()) {
                        pop = new POP2();
                    } else {
                        pop = new POP();
                    }
                    inlineData.addEpilogue(pop);
                    values.transfer(pop);
                }
                return true;
            } else {
                Type type = ((ReturnInstruction) instruction).getType();
                // javac anyway)
                return values.getValueTable().getStackSize() == type.getSize();
            }
        } else {
            // if we encounter an instruction which we do not handle, we do not inline
            unhandledInstructions++;
            if (logger.isTraceEnabled()) {
                logger.trace("Not inlining " + invokee + " because of unhandled instruction " + instruction.toString(invokee.getClassInfo().getConstantPoolGen().getConstantPool()));
            }
            return false;
        }
        // update the stack map since we need it to handle RETURN
        values.transfer(instruction);
        ih = ih.getNext();
    }
    // too many instructions, do not inline
    return false;
}
Also used : ArithmeticInstruction(org.apache.bcel.generic.ArithmeticInstruction) ValueMapAnalysis(com.jopdesign.jcopter.analysis.ValueMapAnalysis) ARRAYLENGTH(org.apache.bcel.generic.ARRAYLENGTH) POP2(org.apache.bcel.generic.POP2) InstructionList(org.apache.bcel.generic.InstructionList) CHECKCAST(org.apache.bcel.generic.CHECKCAST) StackInstruction(org.apache.bcel.generic.StackInstruction) ConversionInstruction(org.apache.bcel.generic.ConversionInstruction) LDC(org.apache.bcel.generic.LDC) InvokeInstruction(org.apache.bcel.generic.InvokeInstruction) StackInstruction(org.apache.bcel.generic.StackInstruction) Instruction(org.apache.bcel.generic.Instruction) FieldInstruction(org.apache.bcel.generic.FieldInstruction) ArithmeticInstruction(org.apache.bcel.generic.ArithmeticInstruction) ConversionInstruction(org.apache.bcel.generic.ConversionInstruction) ReturnInstruction(org.apache.bcel.generic.ReturnInstruction) PushInstruction(org.apache.bcel.generic.PushInstruction) InstructionHandle(org.apache.bcel.generic.InstructionHandle) ReturnInstruction(org.apache.bcel.generic.ReturnInstruction) RETURN(org.apache.bcel.generic.RETURN) LDC2_W(org.apache.bcel.generic.LDC2_W) ValueInfo(com.jopdesign.common.type.ValueInfo) PUTFIELD(org.apache.bcel.generic.PUTFIELD) PushInstruction(org.apache.bcel.generic.PushInstruction) NOP(org.apache.bcel.generic.NOP) POP(org.apache.bcel.generic.POP) InvokeInstruction(org.apache.bcel.generic.InvokeInstruction) GETFIELD(org.apache.bcel.generic.GETFIELD) Type(org.apache.bcel.generic.Type) InvokeSite(com.jopdesign.common.code.InvokeSite) FieldInstruction(org.apache.bcel.generic.FieldInstruction)

Aggregations

GETFIELD (org.apache.bcel.generic.GETFIELD)8 PUTFIELD (org.apache.bcel.generic.PUTFIELD)8 FieldInstruction (org.apache.bcel.generic.FieldInstruction)6 Instruction (org.apache.bcel.generic.Instruction)6 ReferenceType (org.apache.bcel.generic.ReferenceType)6 Type (org.apache.bcel.generic.Type)6 GETSTATIC (org.apache.bcel.generic.GETSTATIC)5 InvokeInstruction (org.apache.bcel.generic.InvokeInstruction)5 PUTSTATIC (org.apache.bcel.generic.PUTSTATIC)5 LDC (org.apache.bcel.generic.LDC)4 CallString (com.jopdesign.common.code.CallString)3 DFATool (com.jopdesign.dfa.DFATool)3 Context (com.jopdesign.dfa.framework.Context)3 ContextMap (com.jopdesign.dfa.framework.ContextMap)3 Set (java.util.Set)3 INVOKEINTERFACE (org.apache.bcel.generic.INVOKEINTERFACE)3 INVOKEVIRTUAL (org.apache.bcel.generic.INVOKEVIRTUAL)3 LoadInstruction (org.apache.bcel.generic.LoadInstruction)3 StoreInstruction (org.apache.bcel.generic.StoreInstruction)3 MethodInfo (com.jopdesign.common.MethodInfo)2